阅读说明：本技术 一种智能调节式病理科取材器 (Intelligent adjustment formula pathology department ware of drawing materials ) 是由 丁伟山 于 2020-06-18 设计创作，主要内容包括：本发明公开了一种智能调节式病理科取材器,一种智能调节式病理科取材器,包括外管体,所述外管体内部套设有内管体,所述外管体的顶部设置有卡头,且卡头的顶部套设有卡口,并且卡口的上方设置有第一铰接轴,所述第一铰接轴的上方铰接有莲花爪切割刀,且莲花爪切割刀的内部固定连接有第一铰接座。本发明通过设置有莲花爪切割刀,可以在切割好组织后,反向转动内管体,让内管体在外管体内部后退,进而带动限位支撑杆的后退,莲花爪切割刀闭合后可以把组织留在莲花爪切割刀的内部,避免组织在取出取出口的过程中对周边的组织造成污染,减少病症细胞扩散的可能。(The invention discloses an intelligent adjustment type pathologist material drawing device which comprises an outer tube body, wherein an inner tube body is sleeved inside the outer tube body, a clamping head is arranged at the top of the outer tube body, a clamping opening is sleeved at the top of the clamping head, a first hinge shaft is arranged above the clamping opening, a lotus claw cutting knife is hinged to the upper portion of the first hinge shaft, and a first hinge seat is fixedly connected to the inner portion of the lotus claw cutting knife. According to the lotus claw cutting knife, the inner tube body can be rotated reversely after the tissues are cut, the inner tube body is retracted inside the outer tube body, the limiting supporting rod is driven to retract, the tissues can be remained inside the lotus claw cutting knife after the lotus claw cutting knife is closed, the tissues on the periphery are prevented from being polluted in the process of taking out the tissues from the taking-out opening, and the possibility of disease cell diffusion is reduced.)

1. The utility model provides an intelligent regulation formula pathology department ware of drawing materials, includes outer body (1), its characterized in that: the inner pipe body (2) is sleeved in the outer pipe body (1), the top of the outer pipe body (1) is provided with a clamping head (3), the top of the clamping head (3) is sleeved with a clamping opening (4), a first hinged shaft (5) is arranged above the clamping opening (4), a lotus claw cutting knife (6) is hinged above the first hinged shaft (5), a first hinged seat (7) is fixedly connected in the lotus claw cutting knife (6), a first hinged rod (8) is hinged on one side, away from the lotus claw cutting knife (6), of the first hinged seat (7), a second hinged seat (9) is hinged on one end, away from the first hinged seat (7), of the first hinged rod (8), a sliding sleeve rod (10) is fixedly connected on one side, away from the first hinged rod (8), of the sliding sleeve rod (10), and a limiting support rod (11) is inserted in the sliding sleeve rod (10), the surface of the inner part of the sliding sleeve rod (10) which is positioned on the limiting support rod (11) is provided with a sliding bead (12), one side of the sliding sleeve rod (10) far away from the second hinged seat (9) is fixedly connected with a third hinged seat (13), one side of the third hinged seat (13) far away from the sliding sleeve rod (10) is hinged with a second hinged rod (14), one side of the second hinged rod (14) far away from the third hinged seat (13) is provided with a second hinged shaft (15), one side is hinged with a connecting block (16), the inner part of the connecting block (16) is fixedly connected with a needle head (17), the bottom end of the needle head (17) is fixedly connected with an outer needle tube (18), the inner part of the outer needle tube (18) is provided with an inner needle tube (19), the inner part of the inner needle tube (19) is provided with a piston (20), the middle part of the piston (20) is inserted with a hollow, and the bottom of the hollow piston pull rod (21) is fixedly connected with a pull rod handle (22).

2. The intelligent regulating type pathological sampling device as claimed in claim 1, wherein: the inner wall of outer body (1) is provided with the internal thread, the outer wall of interior body (2) is provided with the external screw thread, the external screw thread of outer body (1) and the external screw thread looks adaptation of interior body (2), outer body (1) and interior body (2) constitute threaded connection, rotate interior body (2) and can let interior body (2) reciprocate outside body (1) is inside.

3. The intelligent regulating type pathological sampling device as claimed in claim 1, wherein: the size of the outer surface of the clamping head (3) is matched with the size of a groove formed in the bayonet (4), and the clamping head (3) is connected with the bayonet (4) in a rotating and sliding mode.

4. The intelligent regulating type pathological sampling device as claimed in claim 1, wherein: first articulated shaft (5) and lotus flower claw cut cutting knife (6) set up to six groups, six groups first articulated shaft (5) and lotus flower claw cut cutting knife (6) evenly distributed at the top of outer pipe body (1), lotus flower claw cut cutting knife (6) set up to the arc, and the inside edge of lotus flower claw cut cutting knife (6) sets up to the blade, lotus flower claw cut cutting knife (6) can open and shut through the support of first articulated shaft (5).

5. The intelligent regulating type pathological sampling device as claimed in claim 1, wherein: first articulated seat (7), first articulated rod (8), the articulated seat of second (9) and slip loop bar (10) all set up to six groups, and six first articulated seat of group (7), first articulated rod (8), the articulated seat of second (9) and slip loop bar (10) evenly distributed are in the inboard of lotus flower claw cutting knife (6), the removal of slip loop bar (10) can drive the opening and shutting of lotus flower claw cutting knife (6) through the articulated of first articulated seat (7), first articulated rod (8) and the articulated seat of second (9), singly organize slip loop bar (10) inside be provided with four groups slip pearl (12), and the distance between slip pearl (12) and the diameter looks adaptation of spacing bracing piece (11).

6. The intelligent regulating type pathological sampling device as claimed in claim 1, wherein: the utility model discloses a syringe needle, including body (2), spacing bracing piece (11) set up to six groups, and six groups spacing bracing piece (11) evenly distributed including the top of body (2), six groups spacing bracing piece (11) in the middle of, be connected with the ring, and the middle part of ring is inserted and is equipped with syringe needle (17), spacing bracing piece (11) can drive slip loop bar (10) and rotate after being driven by interior body (2).

7. The intelligent regulating type pathological sampling device as claimed in claim 1, wherein: third articulated seat (13), second articulated rod (14) and second articulated shaft (15) all set up to six groups, six groups third articulated seat (13), second articulated rod (14) and second articulated shaft (15) evenly distributed in the bottom of six groups spacing bracing piece (11), slip loop bar (10) move at the articulated connecting block (16) of driving of spacing bracing piece (11) surface slip accessible third articulated seat (13), second articulated rod (14), second articulated shaft (15), and then drive syringe needle (17) and remove.

8. The intelligent regulating type pathological sampling device as claimed in claim 1, wherein: the top height of the needle head (17) is matched with the top height of the lotus flower claw cutting knife (6), and after the lotus flower claw cutting knife (6) is opened, the needle head (17) can be driven to move upwards, so that the height of the needle head (17) is higher than that of the lotus flower claw cutting knife (6).

9. The intelligent regulating type pathological sampling device as claimed in claim 1, wherein: the bottom of interior needle tubing (19) is provided with the hole, interior needle tubing (19) lets its inner space and outer needle tubing (18) intercommunication through the hole, interior needle tubing (19) inner wall diameter and piston (20) outer wall diameter looks adaptation, interior needle tubing (19) and piston (20) constitute sliding connection.

10. The intelligent regulating type pathological sampling device as claimed in claim 1, wherein: the hollow piston pull rod (21) is internally provided with a hollow pipeline, and the pull rod handle (22) can allow the space to enter the inner needle tube (19) through the hollow pipeline inside the hollow piston pull rod (21).

Technical Field

The invention relates to the technical field of specimen taking in pathology department, in particular to an intelligent adjusting type pathology department specimen taking device.

Background

In modern society, people choose to perform pathological tests after illness to determine the type and cause of illness and propose treatment schemes, and the pathological tests sometimes require patients to be biopsied.

Biopsy refers to the direct excision or clamping of a portion of diseased tissue from a patient, followed by an assay of the diseased tissue and a definitive diagnosis of the pathology.

As a final step in clinical diagnosis, biopsy will draw local material from the patient. The existing material taking mode is direct cutting, clamping or extracting, the operation process is complex and fine, serious pain is often caused to a patient, and in the cutting process, because the blade is cut vertically, the patient is easy to cut unclean, and extra injury is caused to the patient; the extracted tissue has diseased cells and is likely to cause contamination of surrounding tissue during the clamping out of the body. Therefore, in order to solve the above problems, an intelligent adjustable type material drawing device for pathology department is provided.

Disclosure of Invention

The invention aims to provide an intelligent adjusting type pathology department material drawing device, which solves the problems that serious pain is caused to a patient in the existing pathology department test material drawing process, a blade is inconvenient to operate in the cutting process, lesion tissues are easy to be cut unclean, and lesion cells are easy to diffuse into tissues at the edge of a taking-out opening in the taking-out process, which are proposed in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: an intelligent adjusting type pathology department material drawing device comprises an outer tube body, wherein an inner tube body is sleeved inside the outer tube body, a clamping head is arranged at the top of the outer tube body, a clamping opening is sleeved at the top of the clamping head, a first hinge shaft is arranged above the clamping opening, a lotus flower claw cutting knife is hinged above the first hinge shaft, a first hinge seat is fixedly connected inside the lotus flower claw cutting knife, a first hinge rod is hinged on one side, away from the lotus flower claw cutting knife, of the first hinge seat, a second hinge seat is hinged on one end, away from the first hinge seat, of the first hinge rod, a sliding sleeve rod is fixedly connected on one side, away from the first hinge rod, of the second hinge seat, a limiting support rod is inserted inside the sliding sleeve rod, a sliding bead is arranged on the surface, located inside the limiting support rod, of the sliding sleeve rod, a third hinge seat is fixedly connected on one side, away from the second hinge seat, of the, and one side that slip loop bar was kept away from to third articulated seat articulates there is the second articulated rod to one side that the third articulated seat was kept away from to the second articulated rod is provided with the second articulated shaft, one side articulated have the connecting block, and the inside fixedly connected with syringe needle of connecting block, the outer needle tubing of bottom fixedly connected with of syringe needle, and the inside of outer needle tubing is provided with interior needle tubing to interior needle tubing's inside is provided with the piston, the piston middle part is inserted and is equipped with the cavity piston pull rod, and the bottom fixedly connected with pull rod handle of cavity piston pull rod.

Preferably, the inner wall of the outer pipe body is provided with an internal thread, the outer wall of the inner pipe body is provided with an external thread, the external thread of the outer pipe body is matched with the external thread of the inner pipe body, the outer pipe body and the inner pipe body form a threaded connection, and the inner pipe body can be moved up and down in the outer pipe body by rotating the inner pipe body.

Preferably, the size of the outer surface of the clamping head is matched with the size of a groove formed in the bayonet, and the clamping head is in rotating sliding connection with the bayonet.

Preferably, first articulated shaft and lotus flower claw cutting knife set up to six groups, six groups first articulated shaft and lotus flower claw cutting knife evenly distributed at the top of outer body, lotus flower claw cutting knife sets up to the arc, and the inside edge of lotus flower claw cutting knife sets up to the blade, lotus flower claw cutting knife can open and shut through the support of first articulated shaft.

Preferably, first articulated seat, first articulated rod, the articulated seat of second and slip loop bar all set up to six groups, and six first articulated seats of group, first articulated rod, the articulated seat of second and slip loop bar evenly distributed are in the inboard of lotus flower claw cutting knife, the removal of slip loop bar can drive the opening and shutting of lotus flower claw cutting knife through the articulated of first articulated seat, first articulated rod and the articulated seat of second, singly organize slip loop bar inside be provided with four groups of slip pearls, and the diameter looks adaptation of distance between the slip pearl and spacing bracing piece.

Preferably, the limiting support rods are arranged into six groups, the six groups of limiting support rods are uniformly distributed at the top end of the inner tube body, a circular ring is connected in the middle of the six groups of limiting support rods, a needle head is inserted in the middle of the circular ring, and the limiting support rods can drive the sliding sleeve rods to rotate after being driven by the inner tube body.

Preferably, third articulated seat, second articulated rod and second articulated shaft all set up to six groups, six groups third articulated seat, second articulated rod and second articulated shaft evenly distributed in the bottom of six groups spacing bracing pieces, the slip loop pole slides the articulated connecting block that drives of accessible third articulated seat, second articulated rod, second articulated shaft on spacing bracing piece surface and removes, and then drives the syringe needle and remove.

Preferably, the top height of the needle head is matched with the top height of the lotus claw cutting knife, and after the lotus claw cutting knife is opened, the needle head can be driven to move upwards, so that the height of the needle head is higher than that of the lotus claw cutting knife.

Preferably, the bottom of interior needle tubing is provided with the hole, interior needle tubing lets its inner space and outer needle tubing intercommunication through the hole, interior needle tubing inner wall diameter and piston outer wall diameter looks adaptation, interior needle tubing and piston constitute sliding connection.

Preferably, a hollow pipeline is arranged inside the hollow piston pull rod, and the pull rod handle can enable the space to enter the inner needle tube through the hollow pipeline inside the hollow piston pull rod.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, the pull rod handle is arranged, the piston can be pulled through the hollow piston pull rod, so that anesthetic placed in the inner needle tube and the outer needle tube is injected to peripheral tissues needing to be taken materials through the needle heads, and the pain of a patient needing biopsy taking materials in the material taking process is reduced;

2. the inner pipe body is arranged, the inner pipe body can rotate and advance in the outer pipe body, the inner pipe body drives the limiting support rod to rotate in the advancing process, the sliding sleeve rod can move towards the outer direction of the limiting support rod in the advancing process, the lotus claw cutting knife is pushed outwards through the hinging of the first hinging seat, the lotus claw cutting knife is opened under the hinging and fixing of the first hinging shaft, the lotus claw cutting knife is provided with a lotus-shaped cutting knife with a blade at the edge and can rotate along with the rotation of the inner pipe body, after local tissues are anesthetized, the opened lotus claw cutting knife is attached to the tissues, the lotus claw cutting knife is rotated reversely, the lotus claw cutting knife is cut at the periphery of the tissues, the operation is more convenient, and residues are avoided;

3. according to the lotus claw cutting knife, after the tissues are cut, the inner tube body can be rotated reversely, the inner tube body is retracted inside the outer tube body, the limiting supporting rod is driven to retract, the sliding sleeve rod is drawn towards the needle head, the third hinge seat and the second hinge rod can be retracted when the sliding sleeve rod is drawn, the connecting block is pushed backwards, the needle head is constrained inside the lotus claw cutting knife, the phenomenon that the edge of a taking-out opening is damaged additionally in the taking-out process is avoided, the tissues can be retained inside the lotus claw cutting knife after the lotus claw cutting knife is closed, the phenomenon that the tissues pollute the surrounding tissues in the taking-out process is avoided, and the possibility of diffusion of disease cells is reduced;

description of the drawings:

in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic front sectional view of a closed structure of a lotus claw cutting knife of the invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A in accordance with the present invention;

FIG. 3 is a front view showing a section view of the structure of the lotus claw cutting knife of the invention;

FIG. 4 is an enlarged view of the structure of FIG. 3 at B according to the present invention;

FIG. 5 is a schematic top view of the closing structure of the lotus claw cutting knife of the present invention;

FIG. 6 is a schematic top view of the structure of the lotus claw cutting knife of the present invention.

In the figure: 1. an outer tubular body; 2. an inner tube body; 3. clamping a head; 4. a bayonet; 5. a first hinge shaft; 6. lotus claw cutting knife; 7. a first hinge mount; 8. a first hinge lever; 9. a second hinge mount; 10. sliding the loop bar; 11. a limiting support rod; 12. a sliding bead; 13. a third hinge mount; 14. a second hinge lever; 15. a second hinge shaft; 16. connecting blocks; 17. a needle head; 18. an outer needle tube; 19. an inner needle tube; 20. a piston; 21. a hollow piston rod; 22. a pull rod handle.

The specific implementation mode is as follows:

the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, an embodiment of the present invention is shown: the utility model provides an intelligence regulation formula pathology department's ware of drawing materials, including outer body 1, the inside cover of outer body 1 is equipped with interior body 2, the inner wall of outer body 1 is provided with the internal thread, the outer wall of interior body 2 is provided with the external screw thread, the external screw thread of outer body 1 and the external screw thread looks adaptation of interior body 2, outer body 1 and interior body 2 constitute threaded connection, rotate interior body 2 and can let interior body 2 reciprocate in body 1 is inside outside, can push the device inside taking out the mouth through being provided with outer body 1, let near the device contacts patient's tissue, examine with drawing materials to the patient, through being provided with interior body 2, can control opening of lotus flower claw cutting knife 6 closed, and the lift of syringe needle 17, let the operation more convenient, convenience when having improved the user and used and the accuracy of operation.

The top of the outer tube body 1 is provided with a chuck 3, the top of the chuck 3 is sleeved with a bayonet 4, the size of the outer surface of the chuck 3 is matched with the size of a groove formed in the bayonet 4, the chuck 3 and the bayonet 4 form a rotary sliding connection, a first articulated shaft 5 is arranged above the bayonet 4, a lotus flower claw cutting knife 6 is hinged above the first articulated shaft 5, the first articulated shaft 5 and the lotus flower claw cutting knife 6 are arranged into six groups, the six groups of first articulated shaft 5 and lotus flower claw cutting knife 6 are uniformly distributed on the top of the outer tube body 1, the lotus flower claw cutting knife 6 is arranged into an arc shape, the inner edge of the lotus flower claw cutting knife 6 is arranged into a blade, the lotus flower claw cutting knife 6 can be opened and closed through the support of the first articulated shaft 5, the lotus flower claw cutting knife 6 can drive the first articulated shaft 5 to follow the rotation of the inner tube body 2 through the arrangement of the chuck 3 and the bayonet 4, and the lotus flower, the opening and closing of the lotus claw cutting knife 6 at the top end of the outer tube body 1 can be supported by the first articulated shaft 5, and the lotus claw cutting knife 6 with the edge as the knife edge is arranged, the tissue which needs to be taken can be cut, the lotus claw cutting knife 6 is arranged to be a cambered surface, the pain of a patient can be reduced when the patient enters the taking-out opening, and the lotus claw cutting knives 6 are arranged, the lotus claw cutting knife 6 can be in a clamping structure when being closed, cut tissues are clamped by the lotus claw cutting knife 6, the tissues with pathological changes are prevented from contacting with the tissues around the taking-out opening, the possibility of pollution of the surrounding tissues is reduced, after the lotus claw cutting knife 6 is closed, the needle head 17 can be wrapped, so that the needle head 17 is prevented from scratching human tissues when entering the taking-out port, the pain of a patient is reduced, and the injection accuracy of the needle head 17 is improved.

The inner part of the lotus claw cutting knife 6 is fixedly connected with a first hinge seat 7, one side of the first hinge seat 7, which is far away from the lotus claw cutting knife 6, is hinged with a first hinge rod 8, one end of the first hinge rod 8, which is far away from the first hinge seat 7, is hinged with a second hinge seat 9, one side of the second hinge seat 9, which is far away from the first hinge rod 8, is fixedly connected with a sliding sleeve rod 10, the first hinge seat 7, the first hinge rod 8, the second hinge seat 9 and the sliding sleeve rod 10 are all arranged into six groups, the six groups of the first hinge seat 7, the first hinge rod 8, the second hinge seat 9 and the sliding sleeve rod 10 are uniformly distributed on the inner side of the lotus claw cutting knife 6, the sliding sleeve rod 10 moves to drive the opening and closing of the lotus claw cutting knife 6 through the hinging of the first hinge seat 7, the first hinge rod 8 and the second hinge seat 9, through the arrangement of the sliding sleeve rod 10, when the limiting support rod 11 moves forwards, the two sides are expanded, the limiting support rods 11 are converged towards the middle when retreating, and then the lotus claw cutting knife 6 is driven to be opened and closed through the transmission of the first hinge seat 7, the first hinge rod 8 and the second hinge seat 9, so that the device becomes an opening cutting and closing clamping structure.

The limiting support rods 11 are inserted into the sliding sleeve rods 10, the limiting support rods 11 are arranged into six groups, the six groups of limiting support rods 11 are uniformly distributed at the top end of the inner tube body 2, the middle parts of the six groups of limiting support rods 11 are connected with a circular ring, a needle head 17 is inserted into the middle part of the circular ring, the limiting support rods 11 can drive the sliding sleeve rods 10 to rotate after being driven by the inner tube body 2, sliding beads 12 are arranged on the surfaces, located on the limiting support rods 11, inside the sliding sleeve rods 10 in a single group, four groups of sliding beads 12 are arranged inside the sliding sleeve rods 10, the distance between the sliding beads 12 is matched with the diameter of the limiting support rods 11, the inner tube body 2 can move forwards and backwards to change the opening and closing of the lotus claw cutting knife 6, rotating power can be provided for the lotus claw cutting knife 6 in the cutting process, and the sliding beads 12 are arranged, the sliding sleeve rod 10 can move more smoothly on the surface of the limiting support rod 11, the clamping is avoided, the flexibility and the operability are improved, and the device fault is avoided.

A third hinge seat 13 is fixedly connected to one side of the sliding sleeve rod 10 far away from the second hinge seat 9, a second hinge rod 14 is hinged to one side of the third hinge seat 13 far away from the sliding sleeve rod 10, a second hinge shaft 15 is arranged on one side of the second hinge rod 14 far away from the third hinge seat 13, the second hinge rod 14 and the second hinge shaft 15 are all arranged into six groups, the six groups of the third hinge seat 13, the second hinge rod 14 and the second hinge shaft 15 are uniformly distributed at the bottom of the six groups of limiting support rods 11, a connecting block 16 is hinged to one side of the six groups of the limiting support rods 11, a needle 17 is fixedly connected inside the connecting block 16, the sliding sleeve rod 10 can slide on the surface of the limiting support rods 11 and can drive the connecting block 16 to move through the hinging of the third hinge seat 13, the second hinge rod 14 and the second hinge shaft 15, so as to drive the needle 17 to move, the top height of the needle 17 is set to be matched with the top height of the, after lotus claw cutting knife 6 is opened, can drive syringe needle 17 and up move, let the height of syringe needle 17 be higher than lotus claw cutting knife 6, through being provided with third hinge seat 13, second hinge rod 14 and second hinge shaft 15, let slip loop bar 10 when spacing bracing piece 11 surface removes, drive third hinge seat 13, connecting block 16 that second hinge rod 14 and second hinge shaft 15 bottom set up reciprocates, through being provided with connecting block 16, can let its fixed connection's syringe needle 17 reciprocate, let the anterior segment of syringe needle 17 can visit and contract in the inside of lotus claw cutting knife 6, let the process of injection more laborsaving, simultaneously can reduce because syringe needle 17 does not wrap up the protection, produce fish tail and harm to peripheral tissue when getting into and taking out the mouth, improve security and protectiveness.

The bottom end of the needle head 17 is fixedly connected with an outer needle tube 18, an inner needle tube 19 is arranged inside the outer needle tube 18, a piston 20 is arranged inside the inner needle tube 19, a hole is arranged at the bottom of the inner needle tube 19, the inner space of the inner needle tube 19 is communicated with the outer needle tube 18 through the hole, the diameter of the inner wall of the inner needle tube 19 is matched with the diameter of the outer wall of the piston 20, the inner needle tube 19 is in sliding connection with the piston 20, a hollow piston pull rod 21 is inserted in the middle of the piston 20, a pull rod handle 22 is fixedly connected to the bottom of the hollow piston pull rod 21, a hollow pipeline is arranged inside the hollow piston pull rod 21, the space can enter the inner needle tube 19 through the hollow pipeline inside the hollow piston pull rod 21 by pulling the pull rod handle 22, the traditional push injection is changed by arranging the piston 20, the injection of the traditional injection is limited in injection, the advancing depth of the needle head is easy to deteriorate in the injection process, the pulling pull rod handle 22 can pass through the hollow piston pull rod 21 and pull the piston 20 outwards, the hollow piston pull rod 21 is arranged to be a hollow pipeline, air can enter the top end of the inner portion of the inner needle tube 19, the space for storing liquid inside the inner needle tube 19 is reduced, liquid inside the inner needle tube 19 enters the outer needle tube 18 through the hole formed in the bottom of the inner needle tube 19, the needle head 17 injects the material-taking part of the pathology department requiring injection anesthesia, the injection deviation is reduced, meanwhile, the pain of a patient is reduced, and extra damage to the patient in the cutting process is avoided.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.