阅读说明：本技术 一种测定造血干细胞移植后患者骨髓微循环环境检测装置 (Survey patient's marrow microcirculation environment detection device after hemopoietic stem cell transplantation ) 是由 石光 于琼 李冬 郝书弘 胡春梅 曲荣锋 于 2019-08-26 设计创作，主要内容包括：本发明公开了一种测定造血干细胞移植后患者骨髓微循环环境检测装置,包括外壳,所述外壳的右侧固定连接有定位座,所述定位座的正面固定连接有固定把手,所述固定把手的正面活动连接有活动把手,所述固定把手和活动把手之间活动连接有复位弹簧,所述活动把手的左端活动连接有推块,所述外壳的左侧固定连接有限位座,所述限位座的正面活动连接有顶块,所述顶块的下方活动连接有限位弹片,该测定造血干细胞移植后患者骨髓微循环环境检测装置,通过行程标尺和行程刻度的配合使用,可对穿刺针推杆的运动行程进行指示,以确保穿刺针穿刺深度的准确,提高了操作时的安全性和准确性,保证患者安全的同时降低了手术的风险。(the invention discloses a device for detecting the microcirculation environment of bone marrow of a patient after hematopoietic stem cell transplantation, which comprises a shell, wherein the right side of the shell is fixedly connected with a positioning seat, the front side of the positioning seat is fixedly connected with a fixed handle, the front side of the fixed handle is movably connected with a movable handle, a reset spring is movably connected between the fixed handle and the movable handle, the left end of the movable handle is movably connected with a push block, the left side of the shell is fixedly connected with a limit seat, the front side of the limit seat is movably connected with an ejector block, the lower part of the ejector block is movably connected with a limit elastic sheet, the device for detecting the microcirculation environment of bone marrow of the patient after hematopoietic stem cell transplantation can indicate the movement stroke of the push rod penetrating puncture needle through the matching use of a stroke scale and a stroke scale, so as to ensure the accuracy of the puncture depth of the puncture needle and improve the safety, the risk of operation is reduced while ensuring the safety of the patient.)

1. the utility model provides a survey patient's marrow microcirculation environment detection device after hemopoietic stem cell transplantation, includes shell (1), its characterized in that: the right side of the shell (1) is fixedly connected with a positioning seat (2), the front of the positioning seat (2) is fixedly connected with a fixed handle (3), the front of the fixed handle (3) is movably connected with a movable handle (4), a reset spring (5) is movably connected between the fixed handle (3) and the movable handle (4), the left end of the movable handle (4) is movably connected with a push block (6), the left side of the shell (1) is fixedly connected with a limiting seat (7), the front of the limiting seat (7) is movably connected with a top block (8), and a limiting elastic sheet (9) is movably connected below the top block (8);

The top of the shell (1) is movably connected with a progress scale (10), the bottom of the shell (1) is movably connected with a travel scale (11), a clamping mechanism (12) is movably connected below the travel scale (11), and two rotating shafts (13) are movably connected inside the clamping mechanism (12);

A process marker post (14) is movably connected inside the shell (1), process scales (15) are arranged on the surface of the process marker post (14), a stroke block (16) is movably connected to the bottom of the process marker post (14), a puncture needle push rod (17) is movably connected to the bottom of the stroke block (16), and stroke scales (18) are arranged on the surface of the puncture needle push rod (17);

chucking mechanism (12) are including drive block (121), the positive swing joint of drive block (121) has two gangbar (122), the one end swing joint that drive block (121) was kept away from in gangbar (122) has driven lever (123), the inboard swing joint of driven lever (123) has fixture block (124), two the articulated department swing joint of driven lever (123) has stopper (125).

2. The apparatus for measuring the bone marrow microcirculation environment of a patient after hematopoietic stem cell transplantation according to claim 1, wherein: the outer shell (1) is of a cylindrical structure, the process marker post (14) and the puncture needle push rod (17) are cylindrical, and the central line of the outer shell (1) is the same as the central lines of the process marker post (14) and the puncture needle push rod (17).

3. the apparatus for measuring the bone marrow microcirculation environment of a patient after hematopoietic stem cell transplantation according to claim 1, wherein: the middle parts of the fixed handle (3) and the movable handle (4) are hinged with each other through a hinge column, the hinge column is fixedly connected with the positioning seat (2), and the movable handle (4) can rotate by taking the hinge column as a fulcrum.

4. the apparatus for measuring the bone marrow microcirculation environment of a patient after hematopoietic stem cell transplantation according to claim 1, wherein: the push block (6) is curved, and one end of the push block (6) far away from the movable handle (4) is in mutual contact with the stroke block (16) and is matched with the stroke block in shape.

5. the apparatus for measuring the bone marrow microcirculation environment of a patient after hematopoietic stem cell transplantation according to claim 1, wherein: the ejector block (8) is movably hinged with the limiting seat (7) through a hinge block, the ejector block (8) can rotate as a fulcrum through the hinge block, the lower portion of the ejector block (8) is curved, the main body shape of the limiting elastic sheet (9) is attached to the curved surface of the ejector block (8), and one end, far away from the hinge block, of the ejector block (8) is in contact with the stroke block (16) and is clamped with the stroke block.

6. The apparatus for measuring the bone marrow microcirculation environment of a patient after hematopoietic stem cell transplantation according to claim 1, wherein: the stroke scale (10) and the stroke scale (11) are identical in specification and size, are annular in shape, the size of the inner ring is matched with that of the stroke mark rod (14) and the puncture needle push rod (17), two pointers are arranged on the surfaces of the stroke scale (10) and the stroke scale, and are identical in height and specification.

7. The apparatus for measuring the bone marrow microcirculation environment of a patient after hematopoietic stem cell transplantation according to claim 1, wherein: the stroke scale is characterized in that the unit of the stroke scale (15) is the same as that of the stroke scale (18), the stroke block (16) is provided with a plurality of serial numbers on the surface of each stroke block (16), the specification and the size of each stroke block (16) are the same, a threaded hole is formed in the upper portion inside each stroke block (16), the bottom of each stroke block is fixedly connected with a threaded ring, the threaded hole is matched with the threaded ring, and the upper stroke block (16) and the lower stroke block (16) are movably connected through the threaded hole and the threaded ring.

8. The apparatus for measuring the bone marrow microcirculation environment of a patient after hematopoietic stem cell transplantation according to claim 1, wherein: the bottom of the progress marker post (14) is fixedly connected with a thread block, the thread block is matched with a thread hole formed in the stroke block (16), the progress marker post (14) is movably connected with the uppermost stroke block (16) through the thread block, a screw hole is formed in the inner top of the puncture needle push rod (17), the screw hole is matched with a thread ring at the bottom of the stroke block (16), and the puncture push rod (17) is movably connected with the lowermost stroke block (16) through the screw hole.

Technical Field

The invention relates to the technical field of medical equipment, in particular to a detection device for determining the microcirculation environment of bone marrow of a patient after hematopoietic stem cell transplantation.

background

Hematopoietic stem cell transplantation is a treatment method for patients to firstly receive ultra-high dose radiotherapy or chemotherapy (usually lethal dose radiotherapy and chemotherapy), sometimes in combination with other immunosuppressive drugs, to eliminate tumor cells and abnormal clone cells in vivo, and then to recover hematopoietic stem cells collected from the patients or other people to restore normal hematopoietic and immune functions.

In order to evaluate the body and rehabilitation condition of a transplanted patient and monitor the transplantation effect, the microcirculation environment of the bone marrow of the patient needs to be detected after the bone marrow transplantation operation, and the detection method generally comprises the steps of extracting a certain amount of samples by using a bone marrow puncture technique and then detecting the samples. When the bone marrow puncture operation is performed, puncture is needed to be performed in vivo on a patient, and due to different thicknesses of subcutaneous fat and muscle layers of different patients, the puncture depth needs to be adjusted according to the actual condition of the patient, and the operation is basically performed manually by a doctor at present.

in the puncturing process, because doctors need to take into account all indexes of patients at the same time, the attention of the doctors needs to be highly concentrated, but various sudden situations are very easy to occur in the operation process, the attention of the doctors is possibly dispersed, so that the puncturing depth can not reach a preset plan, if the depth is insufficient, a tissue sample can not be extracted, secondary puncturing is needed, the patients suffer additional pain, and if the depth is excessive, the puncturing needle can puncture the tissue, thereby causing certain influence on the safety of the patients. Meanwhile, the patient needs to be kept awake in the puncturing process, so that a doctor can inquire the condition of the patient at any time, the patient needs to bear severe pain during the puncturing operation, the involuntary body twisting of the patient can be caused, at the moment, if the puncturing speed of the doctor is not uniform, the pain of the patient is easily aggravated, and even the skin at the puncturing position is torn or the subcutaneous nerve tissue is damaged, and certain potential safety hazards exist for the patient.

In order to solve the above problems, the inventor proposes a device for detecting the bone marrow microcirculation environment of a patient after hematopoietic stem cell transplantation, which has the advantages of controllable puncture depth and stable puncture speed, and can indicate the movement stroke of the puncture needle push rod by matching a stroke scale and a stroke scale, so as to ensure the accuracy of the puncture depth of the puncture needle, improve the safety and accuracy during operation, ensure the safety of the patient and reduce the risk of the operation.

disclosure of Invention

The invention aims to solve the problems of controllable puncture depth, stable puncture speed and the like in the background technology, and provides a device for detecting the microcirculation environment of the bone marrow of a patient after hematopoietic stem cell transplantation.

A device for detecting the microcirculation environment of bone marrow of a patient after hematopoietic stem cell transplantation comprises a shell, a positioning seat, a fixed handle, a movable handle, a reset spring, a push block, a limiting seat, a top block, a limiting elastic sheet, a process scale, a stroke scale, a clamping mechanism, a rotating shaft, a process marker post, process scales, a stroke block, a puncture needle push rod, stroke scales, a driving block, a linkage rod, a driven rod, a clamping block and a limiting block;

The positions and the connection relations of the structures are as follows:

The right side of the shell is fixedly connected with a positioning seat, the front side of the positioning seat is fixedly connected with a fixed handle, the front side of the fixed handle is movably connected with a movable handle, a reset spring is movably connected between the fixed handle and the movable handle, the left end of the movable handle is movably connected with a push block, the left side of the shell is fixedly connected with a limiting seat, the front side of the limiting seat is movably connected with a top block, and a limiting elastic sheet is movably connected below the top block;

the top of the shell is movably connected with a process scale, the bottom of the shell is movably connected with the process scale, a clamping mechanism is movably connected below the process scale, and two rotating shafts are movably connected inside the clamping mechanism;

The inner part of the shell is movably connected with a process marker post, the surface of the process marker post is provided with process scales, the bottom of the process marker post is movably connected with a stroke block, the bottom of the stroke block is movably connected with a puncture needle push rod, and the surface of the puncture needle push rod is provided with the stroke scales;

The clamping mechanism comprises a driving block, the front surface of the driving block is movably connected with two linkage rods, one ends of the linkage rods, far away from the driving block, are movably connected with driven rods, the inner sides of the driven rods are movably connected with clamping blocks, and the hinged parts of the two driven rods are movably connected with limiting blocks;

Preferably, the stroke blocks are vertically arranged from top to bottom, and the serial numbers of the stroke blocks are sequentially arranged from small to large;

preferably, the top of the driving block is movably connected with the movable handle, and the movable handle can drive the driving block to synchronously move in the same direction when moving;

preferably, the two linkage rods have the same specification and size, the two linkage rods are movably hinged with the two driven rods respectively, and the height of the hinged part of the left linkage rod and the driving rod is higher than that of the hinged part of the right linkage rod and the driving rod in an initial state;

Preferably, the two fixture blocks are the same in specification and size, are of semicircular structures and are symmetrically distributed by taking the middle point of the limiting block as a reference, and semicircular grinding discs are arranged on the inner sides of the fixture blocks, and the inner diameter sizes of the grinding discs are matched with the outer diameter size of the puncture needle push rod;

the invention has the beneficial effects that:

1. This survey patient's marrow microcirculation environment detection device after hemopoietic stem cell transplantation, specification and dimension through making process scale and stroke scale are all the same, its shape is the size of annular and inner ring and the size looks adaptation of process sighting rod and pjncture needle push rod, its surface all is provided with two pointers, the highly uniform and the specification of two pointers are the same, can audio-visually carry out real-time supervision to the motion condition of device, the cooperation of process scale and process scale is used, the motion range of the demonstration process sighting rod that can be accurate, the operator of being convenient for observes.

2. This survey patient's marrow microcirculation environment detection device after hemopoietic stem cell transplants uses through the cooperation of stroke scale and stroke scale, can instruct the motion stroke of puncture needle push rod to ensure the accuracy of puncture needle puncture depth, security and accuracy when having improved the operation have reduced the risk of operation when guaranteeing patient's safety.

3. The device for detecting the bone marrow microcirculation environment of the patient after the hematopoietic stem cell transplantation is characterized in that a plurality of stroke blocks are arranged, the surface of each stroke block is sequentially provided with serial numbers, the specification and the size of the stroke blocks are the same, the upper part inside each stroke block is provided with a threaded hole, the bottom of each stroke block is fixedly connected with a threaded ring, the threaded hole is matched with the threaded ring, the upper stroke block and the lower stroke block are movably connected through the threaded hole and the threaded ring, a certain number of stroke blocks can be selected according to actual needs in the operation process, when all the stroke blocks are not in contact with the push block, namely, the device reaches the preset puncture depth, the design can ensure the accuracy of the puncture depth in the operation process, avoid the insufficient puncture depth or the excessive puncture depth, improve the safety of patients, meanwhile, the puncture depth of the puncture needle does not need to be concerned at all times in the operation, and the concentration degree of medical staff in the operation process can be improved.

4. This survey patient's marrow microcirculation environment detection device after hematopoietic stem cell transplantation, through the actuating lever, the gangbar, the driven lever, the cooperation of fixture block and activity handle is used, can guarantee the stability of pjncture needle at the puncture in-process, when the upward movement of activity handle, back-to-back motion is done to two fixture blocks, do not restrict the position of pjncture needle push rod, when the downward movement of activity handle, relative motion is made to two fixture blocks, the position of restriction pjncture needle push rod, the stability of pjncture needle position at the operation in-process can be guaranteed to above-mentioned structure, the security of operation has been improved, the risk of medical accident has been reduced to appear.

Drawings

FIG. 1 is a cross-sectional view of a connection structure of the present invention, with each structure in an initial state;

FIG. 2 is a schematic view of the movement locus of the structure of the present invention, at this time, the process marker post, the stroke block and the puncture needle push rod move downward synchronously;

FIG. 3 is a schematic view of the connection structure of the chucking mechanism according to the present invention;

FIG. 4 is a schematic diagram of the movement locus of the chucking mechanism structure according to the present invention;

FIG. 5 is a partial enlarged view of the attachment structure of the housing and the progress scale according to the present invention;

FIG. 6 is a partial enlarged view of the connecting structure of the housing, the top block and the limiting elastic sheet of the present invention;

FIG. 7 is an enlarged view of the structure of FIG. 1 at A according to the present invention;

FIG. 8 is an enlarged view of the structure of FIG. 1 at B in accordance with the present invention;

FIG. 9 is a cross-sectional view of the trip block structure of the present invention;

FIG. 10 is a schematic view of the connection structure of the fixed handle, the movable handle and the push block of the present invention:

FIG. 11 is a schematic diagram of the movement traces of the fixed handle, the movable handle and the pushing block according to the present invention.

In the figure: 1-shell, 2-positioning seat, 3-fixed handle, 4-movable handle, 5-reset spring, 6-push block, 7-limiting seat, 8-top block, 9-limiting elastic sheet, 10-progress scale, 11-travel scale, 12-clamping mechanism, 13-rotating shaft, 14-progress marking rod, 15-progress scale, 16-travel block, 17-puncture needle push rod, 18-travel scale, 121-driving block, 122-linkage rod, 123-driven rod, 124-clamping block, 125-limiting block

Detailed Description

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.

Please refer to fig. 1 to 11:

The device for detecting the bone marrow microcirculation environment of the patient after hematopoietic stem cell transplantation comprises a shell 1, a positioning seat 2, a fixed handle 3, a movable handle 4, a reset spring 5, a push block 6, a limiting seat 7, a top block 8, a limiting elastic sheet 9, a progress scale 10, a travel scale 11, a clamping mechanism 12, a rotating shaft 13, a progress marking rod 14, progress scales 15, a travel block 16, a puncture needle push rod 17 and travel scales 18.

wherein: the clamping mechanism 12 comprises a driving block 121, a linkage rod 122, a driven rod 123, a clamping block 124 and a limiting block 125.

The initial positions and the connection relations of the structures are as follows:

The right side fixedly connected with positioning seat 2 of shell 1, the positive fixedly connected with fixed handle 3 of positioning seat 2, the positive swing joint of fixed handle 3 has movable handle 4, swing joint has reset spring 5 between fixed handle 3 and the movable handle 4, the left end swing joint of movable handle 4 has ejector pad 6, the spacing seat of left side fixedly connected with 7 of shell 1, the positive swing joint of spacing seat 7 has kicking block 8, the below swing joint of kicking block 8 has spacing shell fragment 9.

the top swing joint of shell 1 has process scale 10, and the bottom swing joint of shell 1 has stroke scale 11, and the below swing joint of stroke scale 11 has chucking mechanism 12, and the inside swing joint of chucking mechanism 12 has two pivots 13.

The inside swing joint of casing 1 has process benchmark 14, and the surface of process benchmark 14 has seted up process scale 15, and the bottom swing joint of process benchmark 14 has stroke piece 16, and the bottom swing joint of stroke piece 16 has pjncture needle push rod 17, and the surface of pjncture needle push rod 17 has seted up stroke scale 18.

the clamping mechanism 12 comprises a driving block 121, the front of the driving block 121 is movably connected with two linkage rods 122, one end of each linkage rod 122, far away from the driving block 121, is movably connected with a driven rod 123, the inner side of each driven rod 123 is movably connected with a clamping block 124, and the hinged part of each driven rod 123 is movably connected with a limiting block 125.

wherein:

a. The shell 1 is of a cylindrical structure, the process marker post 14 and the puncture needle push rod 17 are cylindrical, the central line of the shell 1 is in the same straight line with the central lines of the process marker post 14 and the puncture needle push rod 17, the stroke blocks 16 are vertically arranged from top to bottom, and the serial numbers of the stroke blocks are sequentially arranged from small to large.

b. The middle parts of the fixed handle 3 and the movable handle 4 are hinged with each other through hinge columns, the hinge columns are fixedly connected with the positioning seat 2, the movable handle 4 can rotate by taking the hinge columns as fulcrums, the top of the driving block 121 is movably connected with the movable handle 4, and the movable handle 4 can drive the driving block 121 to synchronously move in the same direction when moving.

c. The pushing block 6 is curved, one end of the pushing block 6, which is far away from the movable handle 4, is in mutual contact with the stroke block 16, the shape of the pushing block is matched with that of the stroke block, the specification and the size of the two linkage rods 122 are the same, the two linkage rods 122 are movably hinged with the two driven rods 123 respectively, and in an initial state, the height of the hinged part of the left linkage rod 122 and the driving rod 121 is higher than that of the hinged part of the right linkage rod 122 and the driving rod 121.

wherein:

d. the top block 8 is movably hinged with the limiting seat 7 through a hinge block, the top block 8 can rotate by taking the hinge block as a fulcrum, the lower part of the top block 8 is curved, the main body shape of the limiting elastic sheet 9 is attached to the curved surface of the top block 8, and one end, far away from the hinge block, of the top block 8 is in contact with the stroke block 16 and is clamped with the stroke block.

e. the process scale 10 and the stroke scale 11 are identical in specification and size, the shapes of the process scale 10 and the stroke scale 11 are annular, the size of an inner ring is matched with the size of the process marker post 14 and the size of the puncture needle push rod 17, two pointers are arranged on the surfaces of the process scale and the stroke scale, the heights of the two pointers are identical and the sizes of the two clamping blocks 124 are identical, the process scale and the stroke scale are of semicircular structures and are symmetrically distributed by taking the middle point of the limiting block 125 as a reference, semicircular grinding plates are arranged on the inner sides of the clamping blocks 124, and the inner diameter of each grinding plate is matched with the.

f. The unit of process scale 15 and stroke scale 18 is the same and the specification is unanimous, and stroke piece 16 has a plurality ofly and the surface of every stroke piece 16 all is provided with the serial number according to the order, and stroke piece 16's specification and size is all the same, and the inside top of stroke piece 16 has seted up threaded hole, and bottom fixedly connected with screw ring, this screw hole and screw ring looks adaptation pass through screw hole and screw ring swing joint between two upper and lower stroke pieces 16.

g. the bottom of the process marker post 14 is fixedly connected with a thread block which is matched with a thread hole formed in the stroke block 16, the process marker post 14 is movably connected with the uppermost stroke block 16 through the thread block, the inner top of the puncture needle push rod 17 is provided with a screw hole which is matched with a thread ring at the bottom of the stroke block 16, and the puncture push rod 17 is movably connected with the lowermost stroke block 16 through the screw hole.

The working principle and the process of the invention are as follows:

When in use, the stroke blocks 16 are vertically arranged from top to bottom according to the preset quantity, and the serial numbers are sequentially arranged from small to large, because the upper part inside the stroke block 16 is provided with a threaded hole, the bottom is fixedly connected with a threaded ring, the threaded hole is matched with the threaded ring, the upper stroke block 16 and the lower stroke block 16 are movably connected through the threaded hole and the threaded ring, because the bottom of the process marker post 14 is fixedly connected with a threaded block, the threaded block is matched with the threaded hole arranged inside the stroke block 16, the process marker post 14 is movably connected with the uppermost stroke block 16 through the threaded block, the inner top of the puncture needle push rod 17 is provided with a threaded hole, the threaded hole is matched with the threaded ring at the bottom of the stroke block 16, the puncture push rod 17 is movably connected with the lowermost stroke block 16 through the threaded hole, after the process marker post 14, the stroke block 16 and the puncture needle push rod 17 are connected, the puncture needle is inserted into the shell 1, and the puncture needle is movably connected with the puncture needle push rod 17, so that the device is installed.

please refer to fig. 1 and fig. 9 for the above structure and process.

Under the initial condition, because ejector pad 6 is the curved surface form to the one end that movable handle 4 was kept away from to ejector pad 6 and stroke piece 16 mutual contact and shape looks adaptation, ejector pad 8 is through hinge piece and spacing seat 7 swing joint, so ejector pad 8 can be this hinge piece for the fulcrum rotation, the below of ejector pad 8 is the curved surface form, the major structure of spacing shell fragment 9 is laminated with the curved surface of ejector pad 8, the one end that hinge piece was kept away from to ejector pad 8 contacts and mutual joint with stroke piece 16, so ejector pad 8 and spacing shell fragment 9 can block stroke piece 16 this moment, prevent that it from taking place to remove.

The fixed handle 3 and the movable handle 4 are held, pressure is manually applied to enable the movable handle 4 to move close to the fixed handle 3, the push block 6 is movably connected with the movable handle 4, the push block 6 can be driven by the movable handle 4 at the moment, the middle parts of the fixed handle 3 and the movable handle 4 are hinged with each other through a hinge post, the hinge post is fixedly connected with the positioning seat 2, the movable handle 4 can rotate by taking the hinge post as a fulcrum, the moving direction of the push block 6 is downward, the stroke block 16 can be pushed to synchronously move downward, the stroke block 16 can drive the process mark rod 14 and the puncture needle push rod 17 connected with the stroke block to synchronously move downward, the downward moving numerical value of the device can be obtained by means of the process scale 10 and the process scale 15, and similarly, the downward moving scale of the puncture needle push rod 17 can be obtained by means of the process scale 11 and the process scale 18.

When the movable handle 4 is contacted with the fixed handle 3, the movable handle 4 is loosened, the return spring 5 recovers elastic deformation and pushes the movable handle 4 to return to the original position, and because the angle and the distance between the movable handle 4 and the fixed handle 3 are the same, the displacement generated by pushing the stroke block 16 by the movable handle 4 and the fixed handle in one movement period is always the same.

When the stroke block 16 moves downwards, the compressible top block 8 rotates clockwise by taking the hinged part of the compressible top block and the limiting seat 7 as a fulcrum, and the limiting elastic sheet 9 is positioned below the top block 8, so that the top block 8 does not limit the position of the top block 8 when rotating clockwise.

please refer to fig. 1 to 2, fig. 6 to 8, and fig. 10 to 11 for the above structure and process.

Because the top of the driving block 121 is movably connected with the movable handle 4, the movable handle 4 can drive the driving block 121 to synchronously move in the same direction when moving, that is, when the movable handle 4 moves upwards, the driving block 121 rotates counterclockwise, when the movable handle 4 moves downwards, the driving block 121 rotates clockwise, because the specification and size of the two linkage rods 122 are the same, the two linkage rods 122 are respectively movably hinged with the two driven rods 123, in an initial state, the height of the hinged part of the left linkage rod 122 and the driving rod 121 is higher than the height of the hinged part of the right linkage rod 122 and the driving rod 121, the specification and size of the two fixture blocks 124 are the same, the two fixture blocks are semicircular structures and are symmetrically distributed by taking the midpoint of the limiting block 125 as a reference, the inner side of the fixture block 124 is provided with a semicircular abrasive disc, the inner diameter size of the abrasive disc is matched with the outer diameter size of the puncture needle push rod 17, so when the driving block 121 rotates, the two linkage rods 122 can be driven to move back and forth, and when the driving block 121 rotates clockwise, the two linkage rods 12 can be driven to move relatively.

When the two linkage rods 122 move back to back, the two blocks 124 can be driven to synchronously move in the same direction, and the abrasive disc on the inner side of the blocks 124 is not contacted with the surface of the puncture needle push rod 17, namely, the puncture needle push rod 17 can move freely; when the two linkage rods 122 move relatively, the opposite process is performed, and the abrasive sheet inside the two blocks 124 contacts with the surface of the puncture needle push rod 17 to limit the position.

That is, when the movable handle 4 moves upward, the two blocks 124 move back to each other without restricting the position of the puncture needle plunger 17, and when the movable handle 4 moves downward, the two blocks 124 move relatively to each other to restrict the position of the puncture needle plunger 17.

the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.