CN113952001B

CN113952001B - Bone marrow puncture needle

Info

Publication number: CN113952001B
Application number: CN202111237512.6A
Authority: CN
Inventors: 周潇; 董婷婷; 王思; 韩斌如
Original assignee: Xuanwu Hospital
Current assignee: Xuanwu Hospital
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2023-04-07
Anticipated expiration: 2041-10-22
Also published as: CN113952001A

Abstract

The invention relates to a marrow puncture needle, which at least comprises a needle head used for medical puncture; the supporting piece is used for fixing all the sections of the needle head; the control device is used for controlling the incapability of the supporting piece; the pinhead comprises a pinhead section, a plurality of pinhead sections and a pinhead end section, the pinhead sections and the pinhead end section are connected in an inserting mode, the pinhead penetrates through the supporting pieces of the sections inside to limit the relative displacement of the joints of the pinhead section, the pinhead section and the pinhead end section, and the supporting pieces can lose energy under the action of the control device, so that the sections forming the pinhead are mutually disassembled.

Description

Bone marrow puncture needle

Technical Field

The invention relates to the technical field of medical puncture needle heads, in particular to a marrow puncture needle.

Background

Since the medical bone marrow puncture needle is a medical product which can contact human tissues or blood, the medical bone marrow puncture needle is basically a product which is discarded after being used once, the needle is recycled and reused, and the bone marrow puncture needle is quite dangerous for a patient and is frequently broken because bone is extremely hard, so that the needle head is stuck in the body of the patient, which is frequently generated clinically.

In the prior art, as proposed in patent document with publication number CN113082390A, a hidden self-destruction syringe needle includes an injection syringe needle and a hidden needle device, the hidden needle device includes a hidden needle cap, a protective cap, a guide sleeve and an elastic element, the guide sleeve is provided with a slot set, the slot set includes a guide slot and a locking slot, inner ends of which are mutually communicated, the protective cap is provided with a toothed column, and the toothed column is located in the guide slot; the first inclined plane matching structure and the second inclined plane matching structure are used for enabling the protective cap to rotate in the same direction while axially displacing, the locking groove is used for blocking a tooth column in the locking groove, and the protective cap cannot axially displace inwards.

CN112807523A discloses a self-destruction pull-shrink safety needle, which comprises an injection needle comprising a needle cylinder and a push cylinder, wherein a clamping and releasing choke part is defined at the side of the needle cylinder adjacent to the outlet part of the needle cylinder, a needle cylinder combination containing area is defined in the needle cylinder, a push cylinder sealing soft sleeve is combined and positioned on the push cylinder, an integral function combination is arranged at the side of the outlet part of the needle cylinder, a combination liquid outlet and a combination combining part capable of combining a needle head are arranged on the integral function combination, a clamping and releasing device and a limiting and stopping device are arranged between the needle cylinder and the integral function combination, a self-destruction device is arranged between the push cylinder and the integral function combination, the self-destruction device comprises a self-destruction joint component and a self-destruction positioning component, and a needle head tilting device and an air-sealing device are defined on the integral function combination, so that the push cylinder and the integral function combination are combined through the self-destruction device to pull the needle head into the needle cylinder, and the needle head tilting device can prevent reuse and improve the safety.

CN207693657U discloses an improved bone marrow puncture needle, which comprises a puncture tube, a puncture needle, a fixed sleeve structure, a stress disc structure and a protective head structure, wherein one end of the puncture needle is inserted in the puncture tube, and the other end of the puncture needle is connected with the stress disc structure; the fixed sleeve structure is sleeved at the left end of the outer wall of the puncture tube; the protective head structure is fixed in the middle of the outer wall of the puncture tube; the protection head structure comprises a protection head, a fixing plate, a clamping block, a fixing nut and a protection pad, wherein the fixing plate is respectively blow-molded at the left end of the protection head. The utility model has the advantages that: through the setting of protection head structure, be favorable to preventing this marrow pjncture needle overlength and misoperation when using and cause the problem of injury to the patient, increase the security of this marrow pjncture needle simultaneously, through the setting of atress dish structure, be favorable to when striking this marrow pjncture needle, can make more accurate striking of strength on this marrow pjncture needle.

The self-destruction needle head provided by the technology has a complex structure, the operation required during self-destruction is complicated, the needle head cannot be completely self-destroyed through mechanical force, the needle head still has the possibility of being detached for reuse, the purpose of limiting the reuse of the needle head cannot be achieved, and the bone marrow puncture needle is broken off due to the fact that bone is particularly hard.

Furthermore, on the one hand, due to the differences in understanding to the person skilled in the art; on the other hand, since the inventor has studied a lot of documents and patents when making the present invention, but the space is not limited to the details and contents listed in the above, however, the present invention is by no means free of the features of the prior art, but the present invention has been provided with all the features of the prior art, and the applicant reserves the right to increase the related prior art in the background.

Disclosure of Invention

In order to solve at least a part of the defects in the prior art, the application provides a marrow puncture needle, which at least comprises a needle head used for medical puncture; the supporting piece is used for fixing all the sections of the needle head; the control device is used for controlling the incapability of the supporting piece; the pinhead comprises a pinhead section, a plurality of pinhead sections and a pinhead end section, the pinhead section and the pinhead end section are connected in an inserting mode, the pinhead penetrates through the supporting pieces of the sections inside to limit the relative displacement of the joints of the pinhead section, the pinhead section and the pinhead end section, and the supporting pieces can lose energy under the action of the control device, so that the pinhead is disassembled.

Preferably, the needle head has fixing channels with the same diameter and the same axis in the same line, the fixing channels are parallel to the channel, the fixing channels are buried in the wall of the needle head, the fixing channels penetrate the needle pipe section from the end section of the needle to the inside of the needle head section, and the fixing channels are arranged in the end section of the needle head in a manner of incomplete penetration.

Preferably, mutually matched joint parts are arranged on the periphery sides of the mutually opposite end parts of the needle head section and the needle tube end and the needle tail section, wherein the joint parts comprise circumferential notches and circumferential protrusions corresponding to the circumferential notches, and the circumferential notches and the circumferential protrusions can connect the needle bodies of the needle head sections through mutual insertion.

Preferably, the needle head section and the needle tube section and the joint between the needle tube section and the needle tail section are of a sawtooth structure, the circumferential notch is provided with the sawtooth structure, the circumferential bulge corresponding position is provided with an anti-sawtooth structure matched with the sawtooth structure on the circumferential notch, and the sawtooth structure and the anti-sawtooth structure can further limit the joint to generate displacement in the first direction and the third direction through mutual meshing.

Preferably, the displacement of the needle head section and the needle tube section and the needle end section in the second direction is limited by a support.

Preferably, support piece mainly includes the steel wire bolt, and the steel wire bolt is located fixed passage, and steel wire one end is connected with the bottom plate, and the steel wire bolt other end passes through the terminal screw thread of steel wire bolt and the terminal female connection that corresponds of fixed passage for the junction of each needle body can be right based on the steel wire bolt the pulling force realization pulling force of syringe needle section transmits step by step and then as an organic whole with syringe needle section, syringe needle section and needle end-to-end connection, thereby restriction syringe needle section, syringe needle section and needle end for the ascending displacement disintegration of second side.

Preferably, the bore diameter of the fixing channel varies from the proximal end to the distal end, in particular axially, wherein the bore diameter at the proximal end is the largest and the bore diameter at the distal end is the smallest, the bore diameter at the middle section preferably tapers in a stepped manner from the proximal section to the distal end, the fixing channel being provided with a cut at the needle end section for external cutting of the wire bolt, the cut having a corresponding slice which enables cutting of the wire bolt under pressure of the switch.

Preferably, the bore diameter of the fixation channel is smaller than the bore diameter of the channel, in particular the bore diameter of the channel is five times the bore diameter of said fixation channel.

Preferably, the bottom plate is connected with the spring, the spring is in an extension state, and the left upper end of the bottom plate is provided with a limiting block for controlling the bottom plate to drive the bottom plate to move leftwards under the elastic force of the spring.

Preferably, the switch mainly includes button, pivot, spring and switch board, the button is in switch board surface right side, both sides mid point department about the switch board have and are used for the switch board rotatory the pivot, the lower extreme is connected with the stopper about the switch board, and the maximum displacement distance when the contact height cooperation button of stopper and bottom plate pushes down sets up for when the button pushes down, the stopper can the rebound and no longer keep the limiting displacement to the bottom plate.

Preferably, the section is located switch board right side below, and the pointed sawtooth of even densely covered range is arranged to section week side, and the upper end is connected to the switch board, and the lower extreme passes the syringe needle outer wall, and is adjacent with steel wire bolt, and the section should crescent by the length on the first direction of going up down for the section can be close to gradually and cut steel wire bolt when the button drives down.

Preferably, the button is cylindric structure, and the lower extreme is connected with the switch board, and the diameter cooperation finger of button covers the area size completely and sets up, and wherein, the high cooperation of button surpasss the shrink shell at its place and sets up, and the upper surface align to grid of button has arranged a plurality of protruding small dots that increase frictional force.

The invention has at least the following advantages:

the self-destruction of the used needle head is realized by adopting a more thorough disintegration method, the operation of driving the self-destruction is simple, the needle head after the self-destruction can not be assembled again, and the risk that the needle head is dismantled for reuse is avoided; and a switch for controlling the self-destruction of the needle head is arranged, so that the self-destruction of the needle head is convenient to control; the length of the segmented combining part is long enough, so that the bending capacity of the bone marrow puncture needle is increased; the bending resistance of the needle head is further increased by the design of arranging the channel in the needle head; through steel wire bolt flexonics between each section needle body, even break also can take out from the human body under steel wire bolt's flexonics in the use, can not break inside the human body.

Drawings

FIG. 1 is a simplified overall schematic of the bone marrow puncture needle of the present invention;

FIG. 2 is a cross-sectional view in a second direction of the bone marrow puncture needle of the present invention;

FIG. 3 is a schematic view of the construction of the needle segments of the bone marrow puncture needle of the present invention;

FIG. 4 is a schematic structural view of the self-locking device of the bone marrow puncture needle of the present invention;

fig. 5 is a schematic view showing the construction of a wire bolt of the bone marrow puncture needle of the present invention.

List of reference numerals

10: a needle head; 11: a needle section; 12: a needle tube segment; 13: needle end segment; 14 channels; 15: a circumferential notch; 16: a circumferential projection; 17: a fixed channel; 20: a support member; 21: a connecting shaft; 22: a steel wire bolt; 23: cutting; 25: a base plate; 26: a self-locking device; 261: a ring body; 262: a drive plate; 263: a drive shaft; 264: a small opening; 265: a small spring; 30: a control device; 31: a spring; 32: a switch; 33: a limiting block; 34: retracting the housing; 35: slicing; 36: a spring mount; 361: an access port; 321: a button; 322: a rotating shaft; 323: a spring; 324: a switch plate; 341: a channel; 40: a puncture tube.

Detailed description of the preferred embodiments

The present invention will be described in detail with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that, if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are used for indicating the orientation or positional relationship indicated based on the drawings, they are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that "first direction" refers to a direction parallel to the axis X, "second direction" refers to a direction parallel to the axis Y, and "third direction" refers to a direction parallel to the axis Z.

Examples

The invention provides a marrow puncture needle, which at least comprises a needle head 10, a support 20 and a control device 30, wherein the needle head 10 is used for medical puncture; a support 20 for fixing the sections of needle 10; and the control device 30 is used for controlling the support 20 to break, the needle head 10 comprises a needle head section 11, a plurality of needle tube sections 12 and a needle end section 13, the needle head section 11, the needle tube sections 12 and the needle end section 13 are connected in an inserting mode, the needle head 10 limits the relative displacement of the joint of the needle head section 11 and the needle tube sections 12 and the needle end section 13 through the support passing through the sections internally, and the support 20 can break under the action of the control device 30, so that the sections forming the needle head are mutually disassembled.

In the bone marrow puncture needle described in the attached drawings, the needle head 10 can be divided into a needle head section 11, a plurality of needle tube sections 12 and a needle end section 13, a channel 14 corresponding to liquid such as blood and the like is arranged at the axis of each section of the needle body, and mutually matched joint parts are arranged on the periphery sides of the mutually opposite ends of the needle head section 11, the needle tube section 12 and the needle end section 13, wherein the joint parts comprise a circumferential notch 15 and a circumferential protrusion 16 corresponding to the circumferential notch 15, preferably, the inner walls of the left ends of the needle tube section 12 and the needle head section 11 are provided with the circumferential notch 15, correspondingly, the periphery sides of the right ends of the needle tube section 12 and the needle end section 13 are also provided with the circumferential protrusion 16 corresponding to the left end notches of the needle tube section 12 and the needle head section 11, and the circumferential protrusion 16 and the circumferential notch 16 can be mutually engaged and limit the movement of the two corresponding joint parts relative to the first direction.

According to a preferred embodiment, syringe needle section 11, the length of needle tubing section 12 is the same with needle end section 13, the length of the joint between each corresponding syringe needle section 11 and needle tubing section 12 and needle end section 13 is one third needle section length, the benefit of sectional type design lies in, the syringe needle can be decomposed into the multistage under the manual control after using, self-destruction is thorough, this has increased recycle's technological means to a great extent, and the design of adoption sectional type has reduced the bending moment when using to a certain extent, the stress dispersion that receives when using original syringe needle is to each section needle body in, greatly increased the bending resistance of syringe needle, make the difficult emergence rupture of needle when using.

The circumferential notch 15 is a hollow thick-wall cylindrical structure, the inner walls of the left ends of the needle tube section 12 and the needle head section 11 are provided with the circumferential notches 15, the diameter of each circumferential notch 15 is larger than that of the channel 14 and smaller than that of the needle head 10, the length of each circumferential notch 15 is no more than two thirds of that of each needle body, correspondingly, the circumferential sides of the right ends of the needle tube section 12 and the needle tail end 13 are provided with circumferential protrusions 16 corresponding to small holes, the inner diameter of each circumferential protrusion 16 is the same as that of the channel 14, the outer diameter of each circumferential protrusion 16 is the same as that of each small hole, and preferably, the circumferential protrusions 16 can be integrally formed with the needle tube section 12 or the needle tail end 13.

The connection part of the circumferential notch 15 and the circumferential bulge 16 is a sawtooth connection in a first direction, the right side of the circumferential notch 15 is provided with a sawtooth structure, correspondingly, the right side of the circumferential bulge 16 is provided with an anti-sawtooth structure matched with the sawtooth structure of the circumferential notch 15, the two can be meshed and fixed with each other, and preferably, the sawtooth connection can be replaced by an arc connection, so that the corresponding two connectors are limited to rotate by taking a second direction as a rotating shaft in a sawtooth connection or arc connection mode.

The inner wall of the needle head 10 is embedded with a fixing channel 17, the fixing channel 17 penetrates through the needle pipe section 12 to the needle head section 13 from the needle tail section 13 in a linear shape and is arranged in the needle head section 13 in an incomplete penetration mode, the fixing channel 17 is used for connecting the needle head section 11, the needle pipe section 12 and the needle tail end 13 to the same line in the axis direction, and the diameter of the fixing channel 17 is far smaller than that of the channel 14.

According to a preferred embodiment, the fixing channel 17 is embedded in the inner wall of the needle 10, the aperture of the fixing channel 17 is smaller than the aperture of the channel 14, especially, one fifth of the aperture of the fixing channel 17 is smaller than the aperture of the channel 14, especially, one tenth of the aperture of the fixing channel 17 is smaller than the aperture of the channel 14, by forming the fixing channel 17 in the same direction with the needle 10 on the needle 10, although the tensile strength of the needle 10 is reduced to a certain extent, the bending strength is improved, especially, when one tenth of the aperture of the fixing channel 17 is smaller than the aperture of the channel 14, the corresponding bending strength and shearing strength are significantly increased, and at this time, even if the needle 10 is influenced by harder and larger stress of bone under the setting of the fixing channel 17, the needle 10 is bent and will not break in the patient.

According to a preferred embodiment, the bore diameter of the fixing channel 17 varies from the proximal end to the distal end, in particular in the axial direction, wherein the bore diameter at the proximal end is the largest and the bore diameter at the distal end is the smallest, the bore diameter at the intermediate section preferably tapers in a stepped manner from the proximal section to the distal end, the distal end of the needle 10 being the stressed end in use, and the bore diameter of the fixing channel 17 should decrease in a stepped manner from the proximal end to the distal end in order to ensure the shear resistance of the sections of the needle 10.

The support member 20 mainly includes a steel wire bolt 22, the fixing channel 17 is provided with a steel wire bolt 22 for limiting the displacement of the needle head section 11, the needle tube section 12 and the needle tail end 13 in the second direction, the rightmost end of the steel wire bolt 22 is connected to the needle head section 11, the leftmost end of the steel wire bolt 22 is connected to the bottom plate 25, the steel wire bolt 22 connected to the needle head section 11 and the bottom plate 25 is arranged inside the fixing channel 21, the steel wire bolt 22 can be driven by the bottom plate 25 to make horizontal displacement in the fixing channel 17 in the second direction, the left end of the steel wire bolt 22 is connected to the bottom plate 25, the right end of the steel wire bolt 22 is connected to the needle head section 11 and keeps in a contracting and tensioning state, so that the connection of each needle body can realize gradual tension transmission based on the tension of the steel wire bolt 22 on the needle head section 11 to further connect and fix the needle head section 11, the needle tube section 12 and the needle tail end 13 into a whole, and accordingly limit the displacement disassembly of the needle head section 11, the needle tube section 12 and the needle tail end 13 in the second direction.

Wire bolt 22 is rectangular shape cylinder structure, and wire bolt 22's diameter slightly is lighter than fixed passage 17 for based on wire bolt 22 runs through each needle section and remove the gliding displacement in the second direction under the condition of whole fixed passage 17, wire bolt 22 is connected with bottom plate 25, and steel wire 21 can be taken out in fixed passage 17 under the drive of bottom plate 25, and wire bolt 22 is located the needle end section 13 part and is provided with the incision 23 that supplies the outside to cut off wire bolt 22.

The right end of the steel wire bolt 22 is provided with an external thread connecting the steel wire bolt 22 to the rightmost end of the fixed channel 17, preferably, the external thread can be integrally generated with the steel wire bolt 22, the rightmost side of the fixed channel 17 is provided with an internal thread connected with the external thread in a matching manner, the length of the internal thread is matched with the external thread in a matching manner, so that the steel wire bolt 22 can penetrate through each needle section to be connected into the needle head section 11, and the length of the steel wire bolt 22 is slightly smaller than that of the fixed channel 17, so that the steel wire bolt 22 is in a tightening state under the tension of the bottom plate 25 and the thread, and the steel wire bolt 22 can limit the sliding of each needle section in the second direction.

The bottom plate 25 is a flat cylindrical structure, the diameter of the bottom plate 25 is matched to enable the steel wire bolt 22 to be inserted into the fixing channel 17 and then to be tightly attached to the fixing channel 17, the right end of the bottom plate 25 is connected with the steel wire bolt 22, preferably, the steel wire bolt 22 can be integrally formed with the bottom plate 25, the steel wire bolt 22 can be connected to the right end of the bottom plate 25 through clamping, inserting, bonding and the like, the shaft center of the left end of the bottom plate 25 is connected with the spring 31, and the upper left end of the bottom plate 25 is provided with a stopper 33 for limiting the bottom plate 25 to perform contraction movement in the opposite direction of the second direction under the spring tension, so that the bottom plate 25 can be clamped by the stopper 33 and kept static when the contraction trend of the spring 31 exists.

The cut 23 extends upward from the steel wire bolt 22 through the fixing channel 17 and the needle end section 13 and is connected to the switch 32, so that the steel wire bolt 22 can be cut off from the cut 23 after the needle head 10 is used, and the length of the cut 23 in the second direction is 2 times as long as that of the stopper 33, so that the steel wire 21 can be drawn out from the fixing channel 17 when the stopper 33 moves upward and no longer limits the bottom plate 25.

The control device 30 comprises a spring 31 and a switch 32, one end of the spring 31 is connected with a contraction shell 34, the other end of the spring 31 is connected to a bottom plate 25, the spring 31 is in a stretching state before the needle is used, the spring 31 drives the bottom plate 25 to drive the steel wire bolt 22 to be drawn out from the fixed channel 17 under the action of self elastic potential energy, the contraction shell 34 is provided with a spring base 36 for fixing the spring at the position of the spring 31, the spring base 36 is in a circular platform-shaped cavity structure with the bottom surface coplanar with the contraction shell 34 and the axis line in the second direction, an access opening 361 for allowing the spring to be rotatably placed in is arranged on the first bottom surface of the spring base 36, the access opening 361 is a circular through hole with the diameter being one third of the diameter of the spring 31, and the spring 31 can be fixed in the contraction shell 34 by placing part of the spring 31 in the access opening 361.

The switch 32 mainly comprises a button 321, a rotating shaft 322, a spring 323 and a switch board 324, wherein the button 321 is arranged on the right side of the surface of the switch board 324, the periphery of the switch board 324 is provided with a contraction shell 34 for limiting the switch board to generate large-amplitude displacement, the middle point of the upper side and the lower side of the switch board 324 is provided with the rotating shaft 322 for rotating the switch board 324, the left lower end of the switch board 324 is connected with a limit block 33, and the contact height of the limit block 33 and the switch board 324 is smaller than the maximum moving distance when the button 321 is pressed down. Preferably, switch board 324 can be generated with stopper 33 integral type, spring 323 is located between switch board 324 and the shrink shell, spring 323 is in the shrink state, under the spring action of spring 323, switch board 323 right side can be a little higher than the left side for button 321 on displacement switch board 324 right side can be higher than shrink shell 34 constantly, simultaneously, under the effect of spring 323, button 321 need accept the external elasticity that exceeds spring 323 and just can take place the displacement downwards, this has avoided in the very big degree because button 321 mistake that the staff bumps causes pushes down.

The rotating shaft 322 is used for providing a limiting device for the switch board 324 when the switch board 324 rotates along the first direction, two ends of the rotating shaft 322 are connected to the shrink shell 34, the rotating shaft 322 is located on two sides of the same position of the switch board 324 in the upper direction and the lower direction, the axis of the rotating shaft 322 is along the first direction, so that the switch board 324 can rotate along the first direction with the middle point of a bolt of the rotating shaft 322 as an axis, an arc-shaped groove matched with the rotating shaft 322 to rotate is arranged at the joint of the switch board 324 and the rotating shaft 322, the arc-shaped groove penetrates through the switch board 324 along the first direction, the arc section of the arc-shaped groove is one third of the circumference of the rotating shaft 322, and friction force generated when the arc-shaped groove and the rotating shaft 322 rotate is reduced while the switch board 324 slides relative to the rotating shaft 322.

The section 35 is located below the right of the switch board 324, the sharp sawteeth which are uniformly and densely arranged are arranged on the peripheral side of the section 35, the upper end of the section is connected to the switch board 324, the lower end of the section passes through the outer wall of the needle 10 and the outer wall of the steel wire 21 and is adjacent to the steel wire bolt 22, the length of the section 35 from bottom to top in the first direction is gradually increased, the section 35 is gradually close to and cuts the steel wire bolt 22 when being driven by a button to press downwards, preferably, the section 35 is of a sheet structure with a triangular transverse section in the second direction, the top end of the section 35 is connected to the switch board 324, the sharp sawteeth which are uniform in shape are arranged on two side edges of the section 35, the side edges of the section 35 are located at the adjacent connection position of the steel wire bolt 22, the length of the section 35 is matched with the diameter of the fixing channel 17 to be arranged, and the section can rub against the bolt 22 when being pressed downwards to be displaced by the button 321, and the steel wire bolt 22 is in a tightening connection state at the moment and can be broken when being cut by the section 35.

Button 321 is cylindric structure, the lower extreme is connected with switch board 324, preferably, button 321 can generate with switch board 324 integral type, the area size that the diameter cooperation finger of button 321 covers completely sets up, wherein, the high cooperation of button 321 surpasss its shrink shell 34 that belongs to and sets up, and the upper surface align to grid of button 321 arranges protruding dot for its surface can increase the frictional force with user's finger when using, can play the effect of conveniently pressing during the use, button 321 can keep upwards protruding under the spring action of spring 323, can drive switch board 324 right-hand member under button 321 to shift downwards when receiving the external pressure who is greater than elastic force, further with section 35 displacement downwards in order to cut steel wire bolt 22, make steel wire bolt 22 under the state of tightening take place the fracture.

The through hole which is located at the position where the button 321 is located and matched with the button 321 to be sunken inwards is formed in the contraction shell 34, the through hole penetrates through the contraction shell 34, the diameter of the through hole is matched with the button 321 to be arranged in a sliding mode up and down in the channel, the channel 343 through which the puncture tube 40 penetrates is arranged on the left side of the contraction shell 34, and the channel 343 is matched with the diameter of the puncture tube 40 to be arranged, so that the puncture tube 40 can penetrate out of the contraction shell 34 from the channel 343.

After syringe needle 10 uses the completion, can press button 321 to drive section 35 and cut off steel wire bolt 22, and the perk under the limiting action of pivot 322 of button 321 left end, drive stopper 33 upwards displacement, steel wire bolt 22 fracture part has lost the limiting action of stopper 33, take out from fixed passage under spring 31's contractile action, syringe needle 10 each section that has lost steel wire bolt 22 takes place to disintegrate under self gravity or external effort, disintegrate into syringe needle section 11, needle tubing section 12 and needle end 13, unable reuse, steel wire bolt 22 can't be connected syringe needle section 11 and bottom plate 25 once more, make the unable reuse of this device, the institute that has reduced the secondary use in the very big degree and has caused feels.

Examples

The invention provides a marrow puncture needle, which at least comprises a needle head 10, a support 20 and a control device 30, wherein the needle head 10 is used for medical puncture; a support 20 for fixing the sections of needle 10; and the control device 30 is used for controlling the support 20 to contract, the needle head 10 comprises a needle head section 11, a plurality of needle tube sections 12 and a needle end section 13, the needle head section 11, the needle tube sections 12 and the needle end section 13 are connected in a riveting mode, the needle head 10 limits the relative displacement of the joint of the needle head section and the needle tube sections 12 through the support 20 internally penetrating through the sections, and the support 20 can be extracted from the needle head 10 under the action of the control device 30 so that the needle head is disassembled.

It comprises at least a needle 10, a support 20 and a control device 30, the needle 10 being intended for medical puncture; a support 20 for fixing the sections of needle 10; and the control device 30 is used for controlling the support 20 to contract, the needle head 10 comprises a needle head section 11, a plurality of needle tube sections 12 and a needle end section 13, the needle head section 11, the needle tube sections 12 and the needle end section 13 are connected in a riveting mode, the needle head 10 limits the relative displacement of the joint of the needle head section and the needle tube section 12 through the support internally penetrating through each section, and the support 20 can be drawn out of the needle head 10 under the action of the control device 30, so that the needle head is disassembled.

The bone marrow puncture needle described with reference to the drawings can be disassembled into a needle head section 11, a plurality of needle tube sections 12 and a needle tail section 13, wherein a channel 14 for passing liquid such as blood and the like is correspondingly arranged at the axis of each needle body section, the joint of the needle head section 11 and the needle tube section 12 and the joint of the needle tube section 12 and the needle tail section 13 are connected in a riveting mode, preferably, a circumferential notch 15 is arranged on the inner wall of the left end of the needle tube section 12 and the needle head section 11, correspondingly, a circumferential bulge 16 corresponding to the left end notch of the needle tube section 12 and the needle head section 11 is also arranged on the circumferential side of the right end of the needle tube section 12 and the needle tail end 13, and the circumferential bulge 16 and the circumferential notch 16 can be mutually engaged and limit the movement of the two corresponding connectors at the joints relative to the first direction.

The inner wall of the needle head 10 is embedded with a fixing channel 17, the fixing channel 17 penetrates through the needle pipe section 12 to the needle head section 13 from the needle tail section 13 in a linear shape and is arranged in the needle head section 13 in an incomplete penetration mode, and the fixing channel 17 is used for connecting the needle head section 11, the needle pipe section 12 and the needle tail end 13 to the same line in the axis direction.

The supporting member 20 mainly includes a connecting shaft 21 and a self-locking device 26, the fixing channel 17 is provided with the connecting shaft 21 for limiting the displacement of the needle head section 11, the needle tube section 12 and the needle tail end 13 in the second direction, the rightmost end of the connecting shaft 21 is connected to the needle head section 11, the leftmost end of the connecting shaft 21 is connected to the bottom plate 25, and the connecting shaft 21 can be driven by the bottom plate 25 to make horizontal displacement in the fixing channel 17 relative to the second direction.

Self-locking device 26 buries in needle head section 11 and needle tubing section 12 left end, self-locking device 26 includes ring body 261, driving plate 262, transmission shaft 263 and little spring 265, the angle of driving plate 26 and syringe needle 10 inner wall is the acute angle on the second direction, driving plate 262 is close to syringe needle 10 inner wall one side and is connected with ring body 261, the lower extreme of driving plate 262 is connected with the transmission shaft 263 who buries in the syringe needle 10 inner wall, driving plate 262 can be pressed into syringe needle 10 inner wall when connecting axle 21 passes needle tube section 12 and needle end section 13 right-hand member under the restriction of transmission shaft 263, drive ring body 261 that links to each other with driving plate 262 and wear out to needle end section 13 and needle tube section 13 right-hand member reservation in the osculum 264, thereby restrict the displacement of needle head section 11, connecting axle section 12 and needle end 13 and disintegrate, and little spring 265 that the elasticity coefficient is less in the osculum 264, push ring body 261 out the osculum once more when taking out, make syringe needle 10 take place and disintegrate.

The connecting shaft 21 is a long strip-shaped cylindrical structure, the diameter of the connecting shaft 21 is slightly smaller than the fixing channel 17, so that the needle segments are limited to move in the second direction under the condition that the connecting shaft 21 penetrates through the whole fixing channel 17, the connecting shaft 21 is connected with the bottom plate 25, and the connecting shaft 21 can be pulled out from the fixing channel 17 under the driving of the bottom plate 25.

The bottom plate 25 is a flat cylindrical structure, the diameter of the bottom plate 25 is matched with the connecting shaft 21 to be inserted into the fixing channel 17 and then tightly attached to the fixing channel 17, the right end of the bottom plate 25 is connected with the connecting shaft 21, preferably, the connecting shaft 21 and the bottom plate 25 are integrally formed, the left end of the bottom plate 25 is connected with the spring 31, and the left upper end of the bottom plate 25 is provided with a limiting block 33 which limits the bottom plate 25 to perform contraction movement in the opposite direction of the second direction under the tension of the spring, so that the bottom plate 25 can be clamped by the limiting block 33 and kept static when the bottom plate 25 tends to contract under the tension of the spring 31.

The control device 30 comprises a spring 31 and a switch 32, one end of the spring 31 is connected with a contraction casing 34, the other end of the spring 31 is connected to the bottom plate 25, the spring 31 is in a stretching state before the needle is used, the spring 31 drives the bottom plate 25 to drive the connecting shaft 21 to be drawn out from the fixed channel 17 under the action of self-generated elastic potential energy, the contraction casing 34 is provided with a spring base 36 for fixing the spring at the position of the spring 31, the spring base 36 is in a circular platform-shaped cavity structure with the bottom surface coplanar with the contraction casing 34 and the axis line in the second direction, an access opening 361 for allowing the spring to be rotatably placed in is arranged on the first bottom surface of the spring base 36, the access opening 361 is a circular through hole with the diameter being one third of the diameter of the spring 31, and the spring 31 can be fixed in the contraction casing 34 by placing part of the spring 31 in the access opening 361.

The switch 32 mainly comprises a button 321, a rotating shaft 322, a spring 323 and a switch board 324, wherein the button 321 is arranged on the right side of the surface of the switch board 324, the periphery of the switch board 324 is provided with a retractable shell 34 for limiting the switch board to generate large-amplitude displacement, the rotating shaft 322 for rotating the switch board 324 is arranged on two sides of the switch board 324 in the third direction, the left lower end of the switch board 324 is connected with a limit block 33, and the contact height of the limit block 33 and the switch board 324 is smaller than the maximum moving distance when the button 321 is pressed down. Preferably, switch board 324 can be generated with stopper 33 integral type, spring 323 is located between switch board 324 and the shrink shell, spring 323 is in the shrink state, under the spring action of spring 323, switch board 323 right side can be a little higher than the left side for button 321 on displacement switch board 324 right side can be higher than shrink shell 34 constantly, simultaneously, under the effect of spring 323, button 321 need accept the external elasticity that exceeds spring 323 and just can take place the displacement downwards, this has avoided in the very big degree because button 321 mistake that the staff bumps causes pushes down.

The rotating shaft 322 is used for providing a limiting device for the switch board 324 when the rotating shaft rotates along the first direction, two ends of the rotating shaft 322 are connected to the shrinkage shell 34, the rotating shaft 322 is located on two sides of the same position above and below the switch board 324, the axis of the rotating shaft 322 is along the first direction, so that the switch board 324 can rotate along the first direction with the midpoint of a connecting line of the rotating shaft 322 as an axis, an arc-shaped groove matched with the rotating shaft 322 for rotation is arranged at the connecting position of the switch board 324 and the rotating shaft 322, the arc-shaped groove penetrates through the switch board 324 along the first direction, the arc-shaped section of the arc-shaped groove is one third of the circumference of the rotating shaft 322, and friction force generated when the arc-shaped groove and the rotating shaft 322 rotate is reduced while the switch board 324 slides relative to the rotating shaft 322.

Button 321 is cylindric structure, the lower extreme is connected with switch board 324, preferably, button 321 can generate with switch board 324 integral type, the area size that the diameter cooperation finger of button 321 covers completely sets up, wherein, the high cooperation of button 321 surpasss its shrink shell 34 at place and sets up, and the upper surface align to grid of button 321 arranges protruding dot, make its surface can increase the frictional force with user's finger when using, can play the effect of conveniently pressing during the use, button 321 can keep upwards protruding under the spring action of spring 323, can drive switch board 324 left end perk upwards under button 321 when receiving the external pressure who is greater than elasticity, thereby drive stopper 33 rebound, make connecting axle 21 take out in fixed passage 17 under the pulling force of spring 31.

After the pinhead 10 is used and is accomplished, can press button 321 to drive stopper 33 and upwards remove, connecting axle 21 is taken out from fixed passage 17 under spring 31's elasticity, the driving plate 262 that loses the restriction of connecting axle 21 drives ring body 261 and pops out from xiaokou 264 under little spring 265's elasticity, two connecting pieces are no longer connected, make each section of constituteing pinhead 10 take place to disintegrate, and connecting axle 21 is pulled into in shrink shell 34 completely, can no longer independently pop out, make the unable reuse of this device, the institute that has reduced the overuse in the very big degree and has caused feels.

It should be noted that the above-mentioned embodiments are exemplary, and that those skilled in the art, having benefit of the present disclosure, may devise various arrangements that are within the scope of the present disclosure and that fall within the scope of the invention. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents.

Claims

1. A bone marrow puncture needle at least comprises,

a needle (10) for medical puncturing,

a support (20) for fixing the sections of the needle (10),

a control device (30) for controlling the disabling of the support (20),

the novel needle is characterized in that the needle head (10) comprises a needle head section (11), a plurality of needle pipe sections (12) and a needle end section (13), the needle head section (11), the needle pipe sections (12) and the needle end section (13) are connected in an inserting mode, the needle head (10) limits relative displacement of joints of the needle head section (11), the needle pipe sections (12) and the needle end section (13) through supporting pieces (20) which penetrate through the sections internally, and the supporting pieces (20) can lose energy under the action of the control device (30) so that the sections forming the needle head (10) are mutually disassembled;

the needle head (10) is internally provided with fixing channels (17) which have the same diameter and the same axis center and can be penetrated by the supporting piece (20), and the fixing channels (17) are parallel to the channel (14);

the support piece (20) comprises a steel wire bolt (22), the steel wire bolt (22) is located in the fixed channel (17), one end of the steel wire bolt (22) is connected with the bottom plate (25), the other end of the steel wire bolt (22) is connected with the corresponding internal thread at the tail end of the fixed channel (17) through the thread at the tail end of the steel wire bolt (22), so that the connection position of each needle body can realize gradual transmission of pulling force based on the pulling force of the steel wire bolt (22) on the needle head section (11) so as to connect the needle head section (11), the needle tube section (12) and the needle tail section (13) into a whole, and further limit the displacement disassembly of the needle head section (11), the needle tube section (12) and the needle tail section (13) relative to the second direction;

the control device (30) comprises a spring (31) and a switch (32);

the part of the fixing channel (17) positioned at the needle tail section (13) is provided with a notch (23) for cutting off the steel wire bolt (22) from the outside, and a cut sheet (35) capable of cutting the steel wire bolt (22) under the pressure of a switch (32) is correspondingly arranged at the notch (23);

the bottom plate (25) is connected with a spring (31), and a limiting block (33) for controlling the bottom plate (25) to drive the bottom plate (25) to move under the elastic force of the spring (31) is arranged at the upper left end of the bottom plate (25);

the switch (32) mainly comprises a button (321), a rotating shaft (322), a spring (323) and a switch plate (324), and when the button is pressed down, the limiting block (33) can move upwards and no longer keep limiting effect on the bottom plate (25).

2. Bone marrow puncture needle according to claim 1, characterized in that the fixing channel (17) is embedded in the wall of the needle head (10), the fixing channel (17) extends from the needle end section (13) through the needle tube section (12) to the interior of the needle head section (11), and the fixing channel (17) is arranged in such a way that the fixing channel is not completely penetrated in the needle head section (11) part.

3. Bone marrow puncture needle according to claim 2, characterized in that on the circumferential sides of the ends of the needle head section (11) and the needle tube section (12) and the needle end section (13) facing each other, there are provided mutually cooperating engaging portions, wherein the engaging portions comprise a circumferential notch (15) and a circumferential projection (16) corresponding to the circumferential notch (15), and the circumferential notch (15) and the circumferential projection (16) can connect the segments of the needle head (10) by mutual insertion.

4. A bone marrow puncture needle according to claim 3, characterized in that the joints between the needle head section (11) and the needle tube section (12) and between the needle tube section (12) and the needle end section (13) are of a sawtooth structure, the circumferential notch (15) is provided with a sawtooth structure, the corresponding position of the circumferential protrusion (16) is provided with an anti-sawtooth structure matched with the sawtooth structure on the circumferential notch (15), and the sawtooth structure and the anti-sawtooth structure can mutually engage to further limit the displacement of the joints in the first direction and the third direction.

5. Bone marrow puncture needle according to claim 4, characterized in that the relative displacement between the needle head section (11) and the needle tube section (12) and between the needle tube section (12) and the needle end section (13) is limited by the support (20).

6. Bone marrow puncture needle according to claim 5, characterized in that the bore diameter of the fixing channel (17) varies from the proximal end to the distal end, in particular in the axial direction, wherein the bore diameter at the proximal end is the largest and the bore diameter at the distal end is the smallest, the bore diameter at the middle section tapering in a stepped manner from the proximal section to the distal end.

7. A bone marrow puncture needle according to claim 6, characterized in that the aperture of the fixing channel (17) is smaller than the aperture of the channel (14), and the aperture of the channel (14) is five times the aperture of the fixing channel (17).

8. Bone marrow puncture needle according to claim 7, characterized in, that the spring (31) is in an extended state.

9. The bone marrow puncture needle according to claim 8, characterized in that the button (321) is arranged on the surface of the switch board (324), the middle point of the upper side and the lower side of the switch board (324) is provided with the rotating shaft (322) for rotating the switch board (324), the lower end of the switch board (324) is connected with the stopper (33), and the contact height of the stopper (33) and the bottom plate (25) is matched with the maximum moving distance when the button (321) is pressed down.