CN220374861U - Safety double-blade blood taking needle winding and binding device - Google Patents

Abstract

The utility model relates to a blood taking needle packing technical field provides a safe type double leaf blood taking needle is wound and is wrapped device, installs in the workstation, including winding a book mechanism, wind a book mechanism including the first clamping structure that is used for fixed double leaf structural position, be used for fixed transfusion needle end position's second clamping structure and be used for winding a winding structure, winding structure installs the fastener, the fastener is used for the centre gripping blood taking needle to accomplish around one side hose after rolling up. The utility model provides a safe type double leaf blood taking needle winds and wraps device, blood taking needle winding finishes the back, and in the hose grafting of one side after winding gets into the centre gripping space to use the grip block to support tightly one side of hose, make one side hose after the hose is accomplished firm centre gripping and second splint and clamp plate between, thereby can reduce winding structure's winding pole break away from in the hose back hose take place loose possibility, and then in being convenient for transfer mechanism put into the pricking bag with the blood taking needle, keep work efficiency.

Description

Safety double-blade blood taking needle winding and binding device

Technical Field

The application relates to the technical field of blood taking needle packaging, in particular to a safe double-blade blood taking needle winding and wrapping device.

Background

The safe double-leaf blood taking needle is an instrument for collecting blood samples in the medical examination process, and consists of a blood taking needle end, a double-leaf structure, a hose and an infusion needle end which are sequentially connected.

The safety double-blade blood taking needle is disposable and belongs to the consumable material with great use in medical apparatus. The double-blade blood taking needle is packaged by a winding and binding device to form a finished product, the existing winding and binding device comprises a transfer mechanism, a winding mechanism and a binding mechanism, and when the double-blade blood taking needle works, the transfer mechanism conveys the blood taking needle to the winding mechanism, and the winding mechanism winds two ends of the blood taking needle along a winding rod after clamping, so that a hose of the blood taking needle is wound to form a round shape, and the blood taking needle end and the infusion needle end are positioned in the same direction; and transferring the wound blood taking needle to a binding mechanism through a transfer mechanism, opening the binding mechanism by a binding bag, placing the wound blood taking needle into the binding mechanism, sealing, and conveying a finished product after sealing to a next station.

After the winding mechanism finishes winding the blood taking needle, the winding mechanism needs to pause winding and take out the winding rod from the hose so as to conveniently transport the blood taking needle to the wrapping mechanism for packaging by using the transfer mechanism; however, the winding rod is separated from the winding rod and can cause the loose phenomenon of the wound blood taking needle after being abutted against the winding rod, so that the transfer mechanism is affected to put the blood taking needle into the pricking bag, the situation of unsmooth packaging occurs, and the working efficiency is reduced.

Disclosure of Invention

In order to be convenient for carry out bagging and sealing with the blood taking needle of coiling shaping, the application provides a safe double-blade blood taking needle is coiled and is wrapped device.

The application provides a safe double-bladed blood taking needle is wrapped around a roll and is wrapped device adopts following technical scheme:

the safe double-blade blood taking needle winding and binding device is arranged on a workbench and comprises a winding mechanism, wherein the winding mechanism comprises a first clamping structure for fixing the position of a double-blade structure, a second clamping structure for fixing the position of an infusion needle end and a winding structure for winding;

the winding structure is provided with a fastener, the fastener comprises a driving plate, a first clamping plate and a second clamping plate, the driving plate is slidably arranged on the winding structure, the first clamping plate and the second clamping plate are arranged on the driving plate at intervals, an opening formed by encircling the first clamping plate, the driving plate and the second clamping plate faces upwards, the winding structure is provided with a first air cylinder, and a driving shaft of the first air cylinder is fixed with the driving plate;

a clamping plate is slidably arranged between the first clamping plate and the second clamping plate, and a gap is reserved between the clamping plate and the clamping plate, and a clamping space for clamping a hose is formed; the clamping plate is connected with the first clamping plate through a sliding rod; a first spring is arranged between the sliding rod and the first clamping plate of the clamping plate, and the first spring is kept in a compressed state in a normal state.

Through adopting foretell technical scheme, carry out the centre gripping through first clamping structure and second clamping structure respectively to the both ends of blood taking needle, start winding structure and wind its hose this moment. When the blood taking needle is wound, the first cylinder is started, the driving plate, the first clamping plate and the second clamping plate move upwards, so that the hose on one side after the winding is completed enters a clamping space between the second clamping plate and the clamping plate through the opening; and the clamping plate moves to one side far away from the first clamping plate and abuts against one side of the hose under the elasticity of the first spring, so that the hose on one side after the hose is completed is firmly clamped between the second clamping plate and the clamping plate, the possibility that the hose is loose after a winding rod of a winding structure is separated from the hose can be reduced, and the transfer mechanism is convenient to put a blood taking needle into a pricking bag, so that the working efficiency is kept.

Optionally, the baffle is installed to one side that the clamping plate is close to first splint, the baffle is located the clamping plate is kept away from the one end of drive plate, first splint has seted up the movable groove that is used for pegging graft the baffle.

Through adopting foretell technical scheme, through setting up the baffle, reduce the drive plate and upwards move, the partial hose after the reel gets into the condition between clamping plate and the first splint, reduces the hose and receives the possibility that pulls the emergence damage.

Optionally, a distance from one end of the clamping plate, which is close to the driving plate, to the second clamping plate is smaller than a distance from the clamping plate, which is far away from the driving plate, to the second clamping plate.

Through adopting foretell technical scheme, through being close to the clamping plate and be less than the clamping plate and keep away from the spacing of driving plate one end to second splint to the spacing of second splint, the internal diameter at clamping space both ends is different promptly, in the hose entering clamping space after being convenient for when first cylinder drive driving plate upwards moves, the winding.

Optionally, the fasteners are provided with a plurality of groups, and driving plates of all the fasteners are connected through a connecting plate.

Through adopting foretell technical scheme, through setting up multiunit fastener, can carry out the rolling to the hose of rolling receipts different directions, further reduce the hose and wind the loose possibility of hair emergence.

Optionally, the first clamping structure includes the grip block, the grip block install in winding structure, the grip block has seted up the centre gripping groove, the hose be close to double leaf structure peg graft in the grip groove, the double leaf structure be close to the one end butt of hose in the grip block lateral wall.

Through adopting foretell technical scheme, when carrying out the centre gripping to the blood taking needle, peg graft the hose through transfer mechanism and get into the centre gripping inslot. Clamping the infusion needle end by using a second clamping structure, and starting the linear module at the moment to enable the second clamping structure to move to one side far away from the first clamping structure; because the outer diameter of the double-blade structure is larger than that of the hose, the double-blade structure is abutted against the side wall of the clamping block, and the hose of the blood taking needle is in a tensioning state; at this time, the winding structure is started to wind the hose, the clamping block rotates along with the winding structure, and the second clamping structure moves to one side close to the winding structure under the driving of the linear module, so that the hose is wound.

Optionally, a reinforcing groove is formed in the inner wall of the clamping groove, a reinforcing block is slidably arranged in the reinforcing groove, and a half ball head is arranged on one side, close to the clamping groove, of the reinforcing block; a second spring is arranged between the reinforcing block and the reinforcing groove, and the semi-ball head is enabled to be in normal abutting connection with the inner wall of one side of the reinforcing groove, which is far away from the reinforcing block, through the elastic force of the second spring.

By adopting the technical scheme, the hose is abutted against the half ball head in the process of being inserted into the clamping groove by arranging the half ball head, and the reinforcing block is moved to one side close to the second spring; after the hose gets into clamping groove bottom, consolidate the piece and take place to remove and make the bulb and clamping groove inner wall looks butt under the elasticity of second spring, can reduce winding structure working process, the hose takes place to remove in the clamping groove and influences the effect of coiling.

Optionally, the second clamping structure includes the board that slides and install in two grip blocks of slide, the board that slides install in through linear module the workstation, the board that slides is installed and is used for with infusion needle end centre gripping two the second cylinder between the grip blocks.

Through adopting foretell technical scheme, when needs are connected infusion syringe needle and second clamping structure, transfer mechanism places infusion syringe needle between two grip blocks, makes two grip blocks be close to each other/keep away from through driving the second cylinder to can carry out the centre gripping to infusion set fixedly.

Optionally, a groove matched with the infusion needle end is arranged on one side, close to each other, of the two clamping plates.

Through adopting foretell technical scheme, through setting up the recess, can reduce the blood taking needle around the book in-process, the condition that takes place to break away from between two grip blocks at transfusion needle end, increase transfusion needle end steadiness between two grip blocks.

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

1. through setting up the fastener, after the blood taking needle is coiled, one side hose after coiling is spliced into the clamping space, and one side of the hose is propped tightly by using the clamping plate, so that one side hose after the hose is completed is firmly clamped between the second clamping plate and the clamping plate, the possibility that the hose is loose after a winding rod of a winding structure is separated from the hose can be reduced, and the transfer mechanism is convenient for placing the blood taking needle into a binding bag, so that the working efficiency is kept;

2. through setting up the hemisphere head, can make the hose peg graft between hemisphere head and centre gripping tank bottom wall, reduce winding structure working process in, the hose takes place to remove in the centre gripping groove and influences around rolling up the effect.

Drawings

Fig. 1 is a schematic view of the overall structure of the present embodiment, mainly showing the winding structure;

FIG. 2 is a schematic view of another angle of the present embodiment, mainly showing the position of the fastener on the winding structure;

FIG. 3 is an enlarged view of a portion of FIG. 1 at A, showing primarily the first cylinder;

FIG. 4 is a schematic view of another angle of the present embodiment, mainly showing the connection plate;

FIG. 5 is an enlarged partial view at B of FIG. 2, primarily showing the fastener;

FIG. 6 is a partial cross-sectional view of the fastener of the present embodiment;

FIG. 7 is an enlarged partial view at C of FIG. 2, primarily showing a first clamping structure;

FIG. 8 is a partial cross-sectional view of the clamping block of the present embodiment;

FIG. 9 is an enlarged view of a portion of FIG. 2 at D, primarily showing a second clamping structure;

fig. 10 is a schematic structural diagram of the second clamping structure of the present embodiment, mainly showing the grooves.

Reference numerals illustrate: 1. a work table; 11. a first mounting frame; 12. a rotation hole; 13. a second mounting frame; 14. a first cylinder; 15. a sleeve; 16. a movable rod; 17. a winding mechanism; 2. a first clamping structure; 21. a clamping block; 22. a clamping groove; 23. a reinforcing groove; 24. a reinforcing block; 25. a second spring; 26. a semi-ball head; 3. a second clamping structure; 31. a linear module; 32. a slip plate; 33. a clamping plate; 34. a second cylinder; 35. a groove; 4. a fastener; 41. a driving plate; 42. a first clamping plate; 421. a chute; 422. a slide bar; 423. a first spring; 424. a movable groove; 43. a second clamping plate; 44. a connecting plate; 45. a clamping plate; 46. a clamping space; 47. a baffle; 5. a winding structure; 51. a rotating disc; 511. a drive hole; 512. a limit groove; 513. a movable hole; 52. a servo motor; 53. a third cylinder; 531. a connecting block; 54. a driving rod; 55. a limit bar; 551. an anti-falling groove.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-10.

The embodiment of the application discloses a safe double-blade blood taking needle winding and wrapping device.

Referring to fig. 1 and 2, a safe double-blade lancet winding and binding device is installed on a workbench 1, and comprises a winding mechanism 17, wherein the winding mechanism 17 comprises a first clamping structure 2, a second clamping structure 3, a fastener 4 and a winding structure 5, the first clamping structure 2 is used for fixing the position of the double-blade structure, the second clamping structure 3 is used for fixing the position of the infusion needle end of the lancet, the fastener 4 is used for clamping a hose on one side of the rear end of the winding, and the winding structure 5 is used for winding the lancet.

Referring to fig. 1 and 2, the winding structure 5 includes a rotating disc 51, a servo motor 52, a third cylinder 53, and a driving rod 54, the first mounting frame 11 is mounted at the bottom of the table 1, the servo motor 52 is fixed to the first mounting frame 11, and an output shaft of the servo motor 52 faces the bottom of the table 1; the third cylinder 53 is connected with the output shaft of the servo motor 52 through a connecting block 531, and a driving rod 54 is fixed on the driving shaft of the third cylinder 53; the surface of the workbench 1 is provided with a rotary hole 12, the rotary disc 51 is rotatably arranged on the rotary hole 12, the rotary disc 51 is provided with a driving hole 511, one end of a driving rod 54 is penetrated through the driving hole 511 and exposed out of the surface of the workbench 1, the outer wall of the driving rod 54 is fixedly provided with a limit strip 55, the extending direction of the limit strip 55 is the same as that of the driving rod 54, and the inner wall of the driving hole 511 is provided with a limit groove 512 matched with the limit strip 55; by providing the limit bar 55, the rotation of the rotation disk 51 can be driven to rotate synchronously when the output shaft of the servo motor 52 rotates.

Referring to fig. 3, an anti-falling groove 551 is formed on the outer wall of the limit bar 55, and an anti-falling block (not shown in the figure) matched with the anti-falling groove 551 is formed on the inner wall of the limit groove 512; when the third cylinder 53 controls the driving shaft to move toward one side close to the servo motor 52, the anti-falling block moves in the anti-falling groove 551, and when the anti-falling block abuts against the top wall of the anti-falling groove 551, the driving shaft stops to move downwards continuously, so that the possibility that the driving shaft is completely separated from the driving hole 511 is reduced.

Two second mounting frames 13 are fixed at the bottom of the rotating disc 51, and the two second mounting frames 13 are symmetrically arranged on two opposite sides of the driving rod 54; one of the second mounting frames 13 is provided with a first air cylinder 14, the other mounting frame is fixedly provided with a sleeve 15, and a movable rod 16 is movably arranged in the sleeve 15.

Referring to fig. 4, the fasteners 4 are provided with a plurality of groups, the fasteners 4 include driving plates 41, a first clamping plate 42 and a second clamping plate 43, the driving plates 41 of all the fasteners 4 are connected through connecting plates 44, the driving shaft of the first cylinder 14 and the movable rod 16 are respectively connected with the connecting plates 44, and by controlling the driving shaft of the first cylinder 14, all the driving plates 41 can be simultaneously controlled to move; and by providing the movable lever 16 and the sleeve 15, stability when all the driving plates 41 are moved can be increased.

Referring to fig. 5 and 6, the first clamping plate 42 and the second clamping plate 43 are both mounted on one side of the driving plate 41 away from the first cylinder 14, and the second clamping plate 43 abuts against the side wall of the driving rod 54; the rotating plate is provided with a movable hole 513 for the first clamping plate 42 and the second clamping plate 43 to move, one side of the first clamping plate 42 close to the second clamping plate 43 is provided with a sliding groove 421, a sliding rod 422 is slidably arranged in the sliding groove 421, and the extending direction of the sliding rod 422 is perpendicular to the extending direction of the first clamping plate 42; a first spring 423 is arranged between the slide bar 422 and the inner wall of the slide groove 421, and the first spring 423 is kept in a compressed state; a clamping plate 45 is fixed on one side of the slide bar 422 away from the first clamping plate 42, and a gap is reserved between the clamping plate 45 and the second clamping plate 43 to form a clamping space 46; in this embodiment, the distance from the end of the clamping plate 45 close to the driving plate 41 to the second clamping plate 43 is smaller than the distance from the end of the clamping plate 45 far away from the driving plate 41 to the second clamping plate 43, so that the coiled hose enters the clamping space when the driving plate 41 is driven by the first air cylinder 14 to move upwards.

Referring to fig. 6, a movable slot 424 is formed on a side of the first clamping plate 42, which is close to the clamping plate 45, the movable slot 424 is located at one end of the first clamping plate 42, which is far away from the driving plate 41, a baffle 47 is fixed on a side of the clamping plate 45, which is close to the first clamping plate 42, and one end of the baffle 47, which is far away from the clamping plate 45, is movably inserted into the movable slot 424. By providing the baffle 47, the portion of the hose after reeling is inserted between the clamping plate 45 and the first clamping plate 42, reducing the possibility of damage to the hose by pulling.

Referring to fig. 2 and 7, the first clamping structure 2 includes a clamping block 21, the clamping block 21 is fixed on the rotating disc 51, and a distance from a side of the first clamping away from the driving rod 54 to a surface of the driving rod 54 and a distance from a side of the limiting bar 55 away from the driving rod 54 to the surface of the driving rod 54 are set; the side wall of one side of the clamping block 21 is abutted against the driving rod 54, one end of the clamping block 21 far away from the rotating disc 51 is provided with a clamping groove 22, and two ends of the clamping groove 22 are respectively communicated with two opposite side walls of the clamping block 21; the clamping groove 22 is used to insert a hose near one end of the double-bladed structure.

Referring to fig. 8, a reinforcing groove 23 is formed at one end of the clamping groove 22, which is close to the driving rod 54, a reinforcing block 24 and a second spring 25 are movably installed in the reinforcing groove 23, and a half ball head 26 is fixed at one end of the reinforcing block 24, which is far away from the reinforcing groove 23; one end of the second spring 25 is fixed with the inner wall of the reinforcing groove 23, and the other end of the second spring 25 is fixed with one end of the reinforcing block 24 close to the reinforcing groove 23; the elastic force of the second spring 25 enables the half ball head 26 to be abutted against the inner wall of the clamping groove 22 at one side far away from the driving rod 54.

By arranging the half ball head 26 and the reinforcing block 24, when the hose is inserted into the clamping block 21 through the moving mechanism, the hose is abutted against the half ball head 26, and the reinforcing block 24 moves to the side close to the second spring 25 in the abutting process of the hose and the half ball head 26, and the second spring 25 is in a compressed state; when the hose continues to move to the side close to the rotating disc 51 and passes through the half ball head 26, the elastic force of the second spring 25 enables the half ball head 26 to be abutted against the inner wall of the clamping groove 22, that is, the possibility that the hose moves freely in the clamping groove 22 in the winding process can be reduced, and the winding effect of the hose is maintained.

Referring to fig. 9 and 10, the second clamping structure 3 includes a linear module 31, a sliding plate 32, and two clamping plates 33, the linear module 31 is mounted on the surface of the workbench 1, the sliding plate 32 is mounted on the linear module 31, and the linear module 31 is used for driving the sliding plate 32 to move away from/approach to one side of the driving rod 54; the two clamping plates 33 are arranged on one side, far away from the workbench 1, of the sliding plate 32, grooves 35 matched with the infusion needle ends are formed in one side, close to each other, of the two clamping plates 33, a second air cylinder 34 is arranged on one side, far away from each other, of the two clamping plates 33, a driving shaft of the second air cylinder 34 is connected with the clamping plates 33, and the second air cylinder 34 can control the two clamping plates 33 to be close to/far away from each other. By providing the groove 35, the condition that the infusion needle end is separated after being clamped by the two clamping plates 33 can be reduced, and the stability of the blood taking needle winding is improved.

When the blood taking needle is clamped, one end, close to the double-leaf structure, of the hose is inserted into the clamping groove 22 and the end of the infusion needle is placed between the two clamping plates 33 through the transfer mechanism, the two clamping plates 33 are mutually close by driving the second air cylinder 34, and the infusion assembly is clamped and fixed; at this time, the linear module 31 is started to enable the second clamping structure 3 to move to the side far away from the first clamping structure 2; because the outer diameter of the double-blade structure is larger than that of the hose, the double-blade structure is abutted against the side wall of the clamping block 21, and the hose of the blood taking needle is in a tensioning state; at this time, the winding structure 5 is started to wind up the hose, the clamping block 21 rotates along with the rotating disc 51, and the second clamping structure 3 moves to one side close to the rotating disc 51 under the driving of the linear module 31, so that the hose winds up the limiting strip 55 and the outer wall of the clamping block 21.

The implementation principle of the safe double-blade blood taking needle winding and binding device is as follows:

when the flexible tube of the blood taking needle is wound on the outer walls of the limiting bar 55 and the clamping block 21, a gap exists between the flexible tube and the driving rod 54 because the flexible tube is wound on the outer walls of the limiting bar 55 and the second clamping block 21. Starting the first air cylinder 14, wherein the driving shaft of the first air cylinder 14 drives all the fasteners 4 to move upwards, and the second clamping plate 43 passes through the gap between the hose and the driving rod 54, so that the hose on one side of the winding circle is inserted into the clamping hole piece between the second clamping plate 43 and the clamping plate 45; the clamping plate 45 moves to the side far away from the first clamping plate 42 under the elasticity of the first spring 423 and abuts against one side of the hose, so that the hose on one side after the hose is completed is firmly clamped between the second clamping plate 43 and the clamping plate 45; at this time, the third cylinder 53 is started to enable the driving rod 54 to move to the side far away from the rotating disc 51, so that the limiting strip 55 is out of abutting connection with the side wall of the hose; the clamping of the fastener 4 can reduce the possibility that the flexible pipe is loosened after the winding rod of the winding structure 5 is separated from the flexible pipe, so that the transfer mechanism is convenient to put the blood taking needle into the pricking bag, and the working efficiency is kept.

The foregoing is a preferred embodiment of the present application, and is not intended to limit the scope of the present application in this way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. The utility model provides a safe type double leaf blood taking needle is wound up and is wrapped device installs in workstation (1), its characterized in that: the infusion needle comprises a winding mechanism (17), wherein the winding mechanism (17) comprises a first clamping structure (2) for fixing the position of the double-blade structure, a second clamping structure (3) for fixing the position of the infusion needle end and a winding structure (5) for winding;

the winding structure (5) is provided with a fastener (4), the fastener (4) comprises a driving plate (41), a first clamping plate (42) and a second clamping plate (43), the driving plate (41) is slidably arranged on the winding structure (5), the first clamping plate (42) and the second clamping plate (43) are arranged on the driving plate (41) at intervals, openings formed by the surrounding of the first clamping plate (42), the driving plate (41) and the second clamping plate (43) are upward, the winding structure (5) is provided with a first air cylinder (14), and a driving shaft of the first air cylinder (14) is fixed with the driving plate (41);

a clamping plate (45) is slidably arranged between the first clamping plate (42) and the second clamping plate (43), and a clamping space (46) for clamping a hose is formed between the second clamping plate (43) and the clamping plate (45); the clamping plate (45) is connected with the first clamping plate (42) through a sliding rod (422); a first spring (423) is arranged between the sliding rod (422) and the first clamping plate (42) of the clamping plate (45), and the first spring (423) is kept in a compressed state in a normal state.

2. A safety double-bladed lancet roll-up dressing according to claim 1, wherein: the baffle (47) is installed to one side that is close to first splint (42) of clamping plate (45), baffle (47) are located clamping plate (45) keep away from the one end of drive plate (41), movable groove (424) that are used for pegging graft baffle (47) are seted up to first splint (42).

3. A safety double-bladed lancet roll-up dressing according to claim 1, wherein: the distance from one end of the clamping plate (45) close to the driving plate (41) to the second clamping plate (43) is smaller than the distance from one end of the clamping plate (45) far away from the driving plate (41) to the second clamping plate (43).

4. A safety double-bladed lancet roll-up dressing according to claim 1, wherein: the fasteners (4) are provided with a plurality of groups, and the driving plates (41) of all the fasteners (4) are connected through connecting plates (44).

5. A safety double-bladed lancet roll-up dressing according to claim 1, wherein: the first clamping structure (2) comprises a clamping block (21), the clamping block (21) is mounted on the winding structure (5), a clamping groove (22) is formed in the clamping block (21), one side, close to the double-blade structure, of the hose is inserted into the clamping groove (22), and one end, close to the hose, of the double-blade structure is abutted to the side wall of the clamping block (21); the second clamping structure (3) is connected with the workbench (1) through a linear module (31).

6. The safety double-bladed lancet roll packing device of claim 5, wherein: the inner wall of the clamping groove (22) is provided with a reinforcing groove (23), a reinforcing block (24) is slidably arranged in the reinforcing groove (23), and a half ball head (26) is arranged on one side, close to the clamping groove (22), of the reinforcing block (24); a second spring (25) is arranged between the reinforcing block (24) and the reinforcing groove (23), and the semi-ball head (26) is normally abutted against the inner wall of the reinforcing groove (23) at one side far away from the reinforcing block (24) by the elastic force of the second spring (25).

7. The safety double-bladed lancet roll packing device of claim 5, wherein: the second clamping structure (3) comprises a sliding plate (32) and two clamping plates (33) which are installed on the sliding plate (32) in a sliding mode, the sliding plate (32) is connected with the linear module (31), and the sliding plate (32) is provided with a second air cylinder (34) which is used for clamping the infusion needle end between the two clamping plates (33).

8. The safety double-bladed lancet reel packaging apparatus of claim 7, wherein: and a groove (35) matched with the infusion needle end is formed in one side, close to each other, of the two clamping plates (33).