阅读说明：本技术 一种用于血液透析穿刺的护理设备 (A care apparatus for hemodialysis puncture ) 是由 兰丽君 陶惠琴 董静 于 2021-09-02 设计创作，主要内容包括：本发明涉及透析穿刺护理设备技术领域,具体涉及一种用于血液透析穿刺的护理设备,包括固定机构,所述固定机构包括底板,所述底板的顶面两侧均滑动连接有臂板,所述臂板的外侧壁中间位置开设有安置槽,所述安置槽的两侧内侧壁开设有弧槽,所述安置槽内滑动连接有绷紧机构。本发明中,通过臂板、拉绳和绷紧板的设置,两个臂板向中间靠拢对手臂进行夹持的过程中,绷紧板首先与手臂接触挤压,臂板移动带动绷紧板向下偏转,使得绷紧板下移时能够带动与之接触的皮肤下移,两个绷紧板分别带动两侧皮肤下移,从而使得手臂待穿刺部皮肤绷紧,方便准确定位血管和进行穿刺,减少的下针次数。(The invention relates to the technical field of dialysis puncture nursing equipment, in particular to nursing equipment for hemodialysis puncture, which comprises a fixing mechanism, wherein the fixing mechanism comprises a bottom plate, two sides of the top surface of the bottom plate are both connected with arm plates in a sliding manner, a placement groove is formed in the middle position of the outer side wall of each arm plate, arc grooves are formed in the inner side walls of the two sides of the placement groove, and a tightening mechanism is connected in the placement groove in a sliding manner. According to the invention, through the arrangement of the arm plates, the pull rope and the tightening plates, when the two arm plates are drawn close to the middle to clamp the arm, the tightening plates are firstly contacted and extruded with the arm, the arm plates move to drive the tightening plates to deflect downwards, so that the tightening plates can drive the skin contacted with the tightening plates to move downwards when moving downwards, and the two tightening plates respectively drive the skin at two sides to move downwards, so that the skin at the part to be punctured of the arm is tightened, the blood vessel is conveniently and accurately positioned, the puncture is carried out, and the needle inserting times are reduced.)

1. The nursing equipment for hemodialysis puncture is characterized by comprising a fixing mechanism (100), wherein the fixing mechanism (100) comprises a bottom plate (110), arm plates (120) are connected to two sides of the top surface of the bottom plate (110) in a sliding manner, a placement groove (122) is formed in the middle position of the outer side wall of each arm plate (120), arc grooves (124) are formed in the inner side walls of two sides of the placement groove (122), a tightening mechanism (200) is connected in the placement groove (122) in a sliding manner, the tightening mechanism (200) comprises a sliding sleeve (220), a sleeve (211) is fixedly sleeved at one end of the sliding sleeve (220), a sliding block (210) is fixedly sleeved on the outer side wall of the sleeve (211), the sliding block (210) is connected with the inner wall of the corresponding arc groove (124) in a sliding manner, a first return spring (127) is connected to the inner wall of the arc groove (124) in a sliding manner, an inserted rod (240) is sleeved on the inner wall of the sliding sleeve (220) in a sliding manner, the one end of inserted bar (240) has linked firmly tightening plate (242), the lateral wall slip of inserted bar (240) has cup jointed reset spring two (243), pulley (126) are installed to the bottom inside wall of settling groove (122), bottom plate (110) top surface both sides intermediate position has all linked firmly lug (114), the top of lug (114) has linked firmly the stay cord, and the one end of stay cord passes pulley (126) and links firmly with slider (210) bottom.

2. The nursing device for hemodialysis penetration according to claim 1, wherein an internal threaded sleeve (125) is fixedly connected to the middle position of the bottom end of the arm plate (120), a bottom groove (111) is formed between the top surfaces of the bottom plates (110), a bidirectional screw (112) is rotatably connected between two ends of the bottom groove (111), and the bidirectional screw (112) is rotatably connected with the internal threaded sleeve (125).

3. The nursing device for hemodialysis penetration according to claim 1, wherein a first sliding groove (113) is formed at each end of the top surface of the bottom plate (110), a guide rail (121) is fixedly connected to the bottom end of the arm plate (120) corresponding to the two first sliding grooves (113), and the guide rail (121) is slidably connected to the first sliding groove (113) at the corresponding position.

4. The nursing device for hemodialysis penetration according to claim 1, wherein a first limit groove (221) is formed in an inner side wall of the sliding sleeve (220), a limit block (241) is fixedly connected to an annular outer side wall of the other end of the insertion rod (240), the limit block (241) is slidably connected with the first limit groove (221), a limit ring (230) is rotatably connected to the other end of the sliding sleeve (220), and a second limit groove (231) is formed in an inner side wall of the limit ring (230).

5. The nursing device for hemodialysis penetration according to claim 1, wherein a second sliding groove (123) is formed at the top end of each arm plate (120), a pressing mechanism (300) is slidably connected between the top ends of the two arm plates (120), the pressing mechanism (300) comprises a middle plate (320), secondary plates (321) are formed at two ends of the middle plate (320), a sheathing plate (310) is slidably sleeved at one end of each secondary plate (321), a sliding member (330) is rotatably connected at one end of the sheathing plate (310), the two sliding members (330) are respectively slidably connected with the second sliding grooves (123) at the top ends of the two arm plates (120), telescopic rods (342) are fixedly connected to four vertex angles of the bottom surface of the middle plate (320), frame plates (340) are fixedly connected between the bottom ends of the four telescopic rods (342), a first extrusion spring (343) is slidably sleeved on the outer side walls of the telescopic rods (342), the top surface of framed panel (340) has been seted up square hole (341), four apex angle positions of the top surface correspondence square hole (341) of framed panel (340) have linked firmly round bar (354), the downside of square hole (341) is provided with oppression plate (350), the top surface apex angle of oppression plate (350) has all linked firmly connecting rod (351) with round bar (354) one-to-one, the top of connecting rod (351) has linked firmly gleitbretter (352), round bar (354) have been cup jointed in the one end slip of gleitbretter (352), the annular lateral wall slip of round bar (354) has cup jointed two extrusion springs (355), the top and round bar (354) of two extrusion springs (355) link firmly, and the bottom of two extrusion springs (355) and the top surface contact that corresponds gleitbretter (352).

6. The nursing device for hemodialysis penetration according to claim 5, wherein the top surface of the middle plate (320) is opened with a circular hole (322), and the middle of the top surface of the compression plate (350) is fixed with a pulling rod (353).

7. The nursing device for hemodialysis penetration according to claim 1, wherein an inner liner (128) is attached to the inner side wall of the arm plate (120), and the thickness of the inner liner (128) is the same as that of the tightening plate (242).

8. A care apparatus for hemodialysis penetration according to claim 5, wherein the inner contour of the square hole (341) is the same as the outer contour of the compression plate (350).

Technical Field

The invention relates to the technical field of dialysis puncture nursing equipment, in particular to nursing equipment for hemodialysis puncture.

Background

Dialysis is achieved by establishing a blood purification system outside the body of a patient, so that the blood of the patient is purified outside the body and then is infused into the body again to make up for and replace the deficiency of the renal function of the patient, and therefore the patient needs to be treated by dialysis regularly before the renal function is recovered, and one dialysis process generally lasts for 4 to 5 hours.

A doctor needs to accurately insert a puncture needle into a venous blood vessel of a small arm of a patient during dialysis, the blood vessel position of the arm of the patient is difficult to clearly observe and position due to loose skin or thick subcutaneous fat of the arm of the patient, certain difficulty is brought to puncture, the skin of the arm of the patient needs to be tightened, but medical care personnel need to tighten the skin of the arm of the patient and puncture the arm of the patient during actual operation and do not operate well, and the conventional nursing equipment for hemodialysis puncture only clamps and fixes the arm and cannot tighten the skin of the arm to assist in puncture.

Disclosure of Invention

In order to overcome the technical problems, the invention aims to provide a nursing device for hemodialysis puncture, through the arrangement of arm plates, a pull rope and tightening plates, when the two arm plates are drawn close to the middle to clamp an arm, the tightening plates are firstly contacted with the arm, the arm plates move to drive the tightening plates to deflect downwards, the pressure and the friction force of the tightening plates and the skins on the two sides of the part to be punctured of the arm are increased under the pressure action of a second reset spring, so that the tightening plates can drive the skins contacted with the tightening plates to move downwards when moving downwards, the two tightening plates respectively drive the skins on the two sides to move downwards, the skin on the part to be punctured of the arm is tightened, blood vessels are conveniently and accurately positioned for puncture, the number of times of needle inserting is reduced, the arm is clamped and fixed through the two arm plates, the unintentional movement of the arm is effectively reduced, and the risk that a puncture needle is separated from the arm is reduced.

The purpose of the invention can be realized by the following technical scheme:

a nursing device for hemodialysis puncture comprises a fixing mechanism, wherein the fixing mechanism comprises a bottom plate, two sides of the top surface of the bottom plate are respectively connected with an arm plate in a sliding manner, a placement groove is formed in the middle position of the outer side wall of the arm plate, arc grooves are formed in the inner side walls of the two sides of the placement groove, a tightening mechanism is connected in the placement groove in a sliding manner and comprises a sliding sleeve, one end of the sliding sleeve is fixedly sleeved with a sleeve, the outer side wall of the sleeve is fixedly sleeved with a sliding block, the sliding block is connected with the inner wall of the corresponding arc groove in a sliding manner, a first reset spring is connected with the inner wall of the arc groove in a sliding manner and used for enabling the sliding block to move upwards and reset, an inserted bar is sleeved on the inner wall of the sliding sleeve in a sliding manner, one end of the inserted bar is fixedly connected with a tightening plate, a second reset spring is sleeved on the outer side wall of the bottom end of the placement groove in a sliding manner, pulleys are installed on the inner side walls of the bottom of the placement groove, and two sides of the top surface of the bottom plate are fixedly connected with bumps, the top end of the lug is fixedly connected with a pull rope, one end of the pull rope penetrates through the pulley to be fixedly connected with the bottom end of the sliding block, a part to be punctured of an arm of a patient is placed between the two arm plates upwards, the part to be punctured of the arm is aligned with the placement groove of the arm plates, the two arm plates are drawn together and slide towards the middle along the bottom plate, when the arm plates move, one end of the pull rope pulls the sliding block to move towards the pulley along the arc groove, the sliding block drives the tightening plate to deflect downwards, the tightening plate is firstly contacted with the arm through the support of the inserted rod and the second reset spring, in the process that the two arm plates are drawn together, the pressure and the friction force of the tightening plate and the skins at the two sides of the part to be punctured of the arm are increased under the pressure action of the second reset spring, the skin contacted with the tightening plate can be driven to move downwards when the tightening plate moves downwards, the two arm plates clamp and fix the arm, and simultaneously, the two tightening plates respectively drive the skins at the two sides to move downwards, so that the skins at the part to be punctured of the arm are tightened, the blood vessel can be conveniently and accurately positioned and punctured, and the needle inserting times are reduced.

Further, the method comprises the following steps: the bottom intermediate position of arm board links firmly the internal thread cover, the kerve has been seted up to the position between the top surface of bottom plate, it is connected with two-way screw rod to rotate between the both ends of kerve, two-way screw rod closes with the internal thread cover soon and is connected, rotates two-way screw rod, and two-way screw rod closes through soon with the internal thread cover and is connected two arm boards and draws close the slip to the centre along the bottom plate, realizes carrying out the centre gripping to the arm of different thicknesses, effectively reduces the unconscious removal of arm, reduces the danger that the pjncture needle shifted or drops.

Further, the method comprises the following steps: the top surface both ends of bottom plate have all been seted up spout one, the bottom of arm board corresponds two spout positions and has all linked firmly the guide rail, the guide rail with correspond position spout sliding connection, make things convenient for and slide between arm board and the bottom plate.

Further, the method comprises the following steps: the limiting groove I is formed in the inner side wall of the sliding sleeve, the limiting block is fixedly connected to the annular outer side wall of the other end of the inserting rod, the limiting block is connected with the limiting groove I in a sliding mode, the other end of the sliding sleeve is connected with the limiting ring in a rotating mode, the limiting groove II is formed in the inner side wall of the limiting ring, one end of the inserting rod is pulled outwards, the limiting block at one end of the inserting rod is moved to the outer side of the limiting ring, the limiting ring is rotated, the limiting groove II in the limiting ring is staggered with the limiting block, the tightening plate is limited and fixed, the tightening plate does not continue to extrude skin on two sides of the arm, the skin moved downwards can automatically recover to the position, and the tightening plate is prevented from continuously tightening and extruding the skin.

Further, the method comprises the following steps: the top ends of the two arm plates are provided with a second sliding groove, a compression mechanism is connected between the top ends of the two arm plates in a sliding manner and comprises a middle plate, two ends of the middle plate are provided with auxiliary plates, one end of each auxiliary plate is sleeved with a sleeving plate in a sliding manner, one end of the sleeving plate is connected with a sliding piece in a rotating manner, the two sliding pieces are respectively connected with the second sliding grooves at the top ends of the two arm plates in a sliding manner, four vertex angle positions on the bottom surface of the middle plate are fixedly connected with telescopic rods, frame plates are fixedly connected between the bottom ends of the four telescopic rods, the outer side wall of each telescopic rod is sleeved with a first extrusion spring in a sliding manner, the top surface of each frame plate is provided with a square hole, the top surface of each frame plate is fixedly connected with round rods corresponding to the four vertex angle positions of the square hole, compression plates are arranged on the lower sides of the square holes, connecting rods corresponding to the round rods are fixedly connected to the vertex angles of the compression plates, and sliding pieces are fixedly connected to the top ends of the connecting rods, one end of the sliding sheet is sleeved with a round rod in a sliding mode, the annular outer side wall of the round rod is sleeved with a second extrusion spring in a sliding mode, the top end of the second extrusion spring is fixedly connected with the round rod, the bottom end of the second extrusion spring is in contact with the top face of the corresponding sliding sheet, sliding parts at two ends of the compression mechanism respectively slide into the second sliding grooves, the frame plate is in downward contact and extrudes the arm under the action of the first extrusion spring, the compression plate is also in contact with the arm under the driving of the frame plate, the compression mechanism is matched with the two arm plates to clamp the arm, so that the fixation of the arm is increased, the arm is prevented from being separated from the arm plates, the compression plate is moved to the positions above the needle hole and the swab head, the frame plate is in extrusion fit with the arm, the bottom end of the round rod is fixedly connected with the frame plate, the compression plate is downwards extruded on the basis of the frame plate, the swab head is extruded and fixed on the needle hole by the compression plate, and the long-time hand-held cotton swab is replaced to press and stop bleeding of the needle hole, the slide through subplate and cover joint plate cup joints and cup joints the rotation that board and slider are connected for oppression mechanism can adapt to the distance between the two armboards, makes the deckle board and the laminating of arm contact through telescopic link and extrusion spring one, and the oppression board extrudees downwards on the basis of deckle board, thereby makes the oppression board the dynamics that it pressed the cotton swab head the arm to different thicknesses the same, thereby avoids the pressing force degree of oppression board too big or the undersize.

Further, the method comprises the following steps: the round hole has been seted up to the top surface of medium plate, the dead lever has been linked firmly in the middle of the top surface of oppression board, upwards stimulates the dead lever for thereby oppression board and frame plate shift up and break away from with the arm, conveniently remove oppression mechanism.

Further, the method comprises the following steps: the inside wall of arm board has linked firmly the inner liner, and the thickness of inner liner is unanimous with the plate thickness that tightens, and the setting up of inner liner can keep warm to the arm at the dialysis in-process, reduces the arm and catches a cold, and convenient receipts to tightening the board simultaneously are inlayed, and the convenient tightening board breaks away from the extrusion with the arm.

Further, the method comprises the following steps: the inner contour of the square hole is the same as the outer contour of the compression plate, so that the compression plate is prevented from interfering with the frame plate, and the compression plate is convenient to move upwards.

The invention has the beneficial effects that:

1. through the arrangement of the arm plates, the pull rope and the tightening plates, in the process that the two arm plates are drawn close to the middle to clamp the arms, the tightening plates are firstly contacted with the arms, when the arm plates move, one end of the pull rope pulls the sliding block to move along the arc groove and close to the pulley, the sliding block drives the tightening plates to deflect downwards, the pressure and the friction force of the tightening plates and the skins on the two sides of the part to be punctured of the arms are increased under the pressure action of the second reset spring, so that the skins in contact with the tightening plates can be driven to move downwards when the tightening plates move downwards, the two tightening plates respectively drive the skins on the two sides to move downwards, the skins on the part to be punctured of the arms are tightened, blood vessels can be conveniently and accurately positioned, puncture is carried out, and the needle inserting times are reduced;

2. through the arrangement of the arm plates, the inner liner and the compression mechanism, the two arm plates are fixed to clamp the arms by rotating the bidirectional screw, the unintentional movement of the arms is effectively reduced, the inserted rods are pulled outwards and the limiting rings are rotated, so that the tightening plates do not continuously extrude skins on two sides of the arms, the tightening plates are prevented from continuously tightening and extruding the skins, the dialysis process is facilitated, meanwhile, the inner liner can keep the temperature of the arms in the dialysis process, the cooling of the arms is reduced, the sliding pieces at two ends of the compression mechanism respectively slide into the sliding grooves II, the frame plates are contacted downwards and extrude the arms under the action of the extrusion springs I, the compression plates are also contacted with the arms under the driving of the frame plates, and the compression mechanism is matched with the two arm plates to clamp the arms, so that the fixation of the arms is increased, and the separation of the arms and the arm plates is avoided;

3. through the setting of frame plate and oppression board, the back is accomplished in the dialysis, take the pjncture needle out, press the pinhole position on the arm with the cotton swab and stanch, move the oppression board to pinhole and cotton swab head top, release the dead lever, make frame plate and arm contact laminating through telescopic link and extrusion spring one, the oppression board extrudees downwards on the basis of frame plate, thereby it is the same at the arm to different thicknesses its dynamics of pressing the cotton swab head to make the oppression board, thereby avoid the pressing force degree of oppression board too big or undersize, realize replacing to press the hemostasis for a long time handheld cotton swab to the pinhole.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the pressing mechanism of the present invention;

FIG. 3 is an exploded view of the compression mechanism of the present invention;

FIG. 4 is a schematic view of the fixing mechanism of the present invention;

FIG. 5 is a schematic view of the bottom plate structure of the present invention;

FIG. 6 is a schematic view of the arm plate structure of the present invention;

FIG. 7 is a schematic view of the tightening mechanism of the present invention;

fig. 8 is a schematic view of the explosive structure of the tightening mechanism of the present invention.

In the figure: 100. a fixing mechanism; 110. a base plate; 111. a bottom groove; 112. a bidirectional screw; 113. a first sliding chute; 114. a bump; 120. an arm plate; 121. a guide rail; 122. a placing groove; 123. a second chute; 124. an arc groove; 125. an internal thread sleeve; 126. a pulley; 127. a first return spring; 128. an inner liner layer; 200. a tightening mechanism; 210. a slider; 211. a sleeve; 220. a sliding sleeve; 221. a first limiting groove; 230. a limiting ring; 231. a second limiting groove; 240. inserting a rod; 241. a limiting block; 242. tightening the plate; 243. a second return spring; 300. a pressing mechanism; 310. sleeving and connecting plates; 320. a middle plate; 321. a sub-board; 322. a circular hole; 330. a slider; 340. a frame plate; 341. a square hole; 342. a telescopic rod; 343. a first spring is extruded; 350. a compression plate; 351. a connecting rod; 352. sliding blades; 353. pulling a rod; 354. a round bar; 355. and a second spring is extruded.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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. 1-8, a nursing device for hemodialysis puncture includes a fixing mechanism 100, the fixing mechanism 100 includes a bottom plate 110, two sides of a top surface of the bottom plate 110 are slidably connected with arm plates 120, a placement groove 122 is disposed in a middle position of an outer side wall of the arm plate 120, two inner side walls of the placement groove 122 are disposed with arc grooves 124, the placement groove 122 is slidably connected with a tightening mechanism 200, the tightening mechanism 200 includes a sliding sleeve 220, one end of the sliding sleeve 220 is fixedly sleeved with a sleeve 211, an outer side wall of the sleeve 211 is fixedly sleeved with a sliding block 210, the sliding block 210 is slidably connected with an inner wall of the corresponding arc groove 124, an inner wall of the arc groove 124 is slidably connected with a first return spring 127, an inner wall of the sliding sleeve 220 is slidably sleeved with an insertion rod 240, one end of the insertion rod 240 is fixedly connected with a tightening plate 242, an outer side wall of the insertion rod 240 is slidably sleeved with a second return spring 243, a pulley 126 is installed at a bottom end of the inner side wall of the placement groove 122, the middle positions of two sides of the top surface of the bottom plate 110 are fixedly connected with the convex blocks 114, the top ends of the convex blocks 114 are fixedly connected with pull ropes, one ends of the pull ropes penetrate through the pulleys 126 to be fixedly connected with the bottom ends of the sliding blocks 210, the parts to be punctured of the arms of a patient are placed between the two arm plates 120 upwards, the parts to be punctured of the arms are aligned with the placing grooves 122 of the arm plates 120, the two arm plates 120 are drawn together and slide towards the middle along the bottom plate 110, when the arm plates 120 move, one ends of the pull ropes pull the sliding blocks 210 to move towards the pulleys 126 along the arc grooves 124, the sliding blocks 210 drive the tightening plates 242 to deflect downwards, the tightening plates 242 are firstly contacted with the arms through the support of the inserting rods 240 and the two return springs 243, in the process that the two arm plates 120 are drawn together, the tightening plates 242 increase the pressure and the friction force between the tightening plates 242 and the skin on two sides of the parts to be punctured of the arms under the pressure of the two return springs 243, so that the tightening plates 242 can drive the skin contacted with the tightening plates to move downwards when moving downwards, when the two arm plates 120 clamp and fix the arms, the two tightening plates 242 respectively drive the skins at the two sides to move downwards, so that the skins at the parts to be punctured of the arms are tightened, blood vessels are conveniently and accurately positioned and punctured, and the number of times of needle inserting is reduced.

The middle position of the bottom end of the arm plate 120 is fixedly connected with an internal thread sleeve 125, a bottom groove 111 is arranged between the top surfaces of the base plates 110, two ends of the bottom groove 111 are rotatably connected with two-way screw rods 112, the two-way screw rods 112 are rotatably connected with the internal thread sleeve 125, the two-way screw rods 112 are rotated, the two-way screw rods 112 are rotatably connected with the internal thread sleeve 125 to drive the two arm plates 120 to move towards the middle along the base plates 110 to slide, so that arms with different thicknesses can be clamped, the unintentional movement of the arms is effectively reduced, the danger of shifting or falling of the puncture needle is reduced, the two ends of the top surface of the base plate 110 are respectively provided with a first chute 113, the bottom ends of the arm plates 120 corresponding to the two first chutes 113 are fixedly connected with guide rails 121, the guide rails 121 are slidably connected with the first chutes 113 corresponding to the positions, the arm plates 120 and the base plates 110 can conveniently slide, the inner side wall of the sliding sleeve 220 is provided with a first limiting groove 221, and the annular outer side wall of the other end of the insertion rod 240 is fixedly connected with a limiting block 241, stopper 241 and spacing groove 221 sliding connection, the other end of sliding sleeve 220 rotates and is connected with spacing ring 230, spacing groove two 231 has been seted up to the inside wall of spacing ring 230, the one end of outside pulling inserted bar 240, make stopper 241 of inserted bar 240 one end move to the outside of spacing ring 230, rotate spacing ring 230, make spacing groove two 231 and stopper 241 dislocation on the spacing ring 230, thereby spacing fixed to tightening plate 242, make tightening plate 242 not continuing to extrude arm both sides skin, thereby make the skin that is moved down can resume the position by oneself, avoid tightening plate 242 to last to tighten and extrude skin.

The top end of the arm plate 120 is provided with a second sliding groove 123, the top ends of the two arm plates 120 are connected with a pressing mechanism 300 in a sliding manner, the pressing mechanism 300 comprises a middle plate 320, both ends of the middle plate 320 are provided with auxiliary plates 321, one end of each auxiliary plate 321 is slidably sleeved with a sleeved plate 310, one end of each sleeved plate 310 is rotatably connected with a sliding part 330, the two sliding parts 330 are respectively and slidably connected with the second sliding grooves 123 at the top ends of the two arm plates 120, four vertex angles of the bottom surface of the middle plate 320 are fixedly connected with telescopic rods 342, frame plates 340 are fixedly connected between the bottom ends of the four telescopic rods 342, an extrusion spring 343 is slidably sleeved on the outer side wall of each telescopic rod 342, the top surface of each frame plate 340 is provided with a square hole 341, the top surfaces of the frame plates 340 corresponding to the four vertex angles of the square hole 341 are fixedly connected with round rods 354, the lower sides of the square holes 341 are provided with pressing plates 350, the top vertex angles of the pressing plates 350 are fixedly connected with connecting rods 351 corresponding to the round rods 354 one by one to one, the top ends of the connecting rods 351 are fixedly connected with sliding pieces 352, one end of the sliding sheet 352 is sleeved with a round rod 354 in a sliding manner, the annular outer side wall of the round rod 354 is sleeved with a second extrusion spring 355 in a sliding manner, the top end of the second extrusion spring 355 is fixedly connected with the round rod 354, the bottom end of the second extrusion spring 355 is contacted with the top surface of the corresponding sliding sheet 352, the sliding parts 330 at two ends of the pressing mechanism 300 are respectively slid into the second sliding grooves 123, the frame plate 340 is contacted downwards and presses the arm under the action of the first extrusion spring 343, the pressing plate 350 is also contacted with the arm under the driving of the frame plate 340, the pressing mechanism 300 is matched with the two arm plates 120 to clamp the arm, so that the fixation of the arm is increased, the arm is prevented from being separated from the arm plate 120, the pressing plate 350 is moved to the position above the needle hole and the cotton swab head, the frame plate 340 is pressed and jointed with the arm, because the bottom end of the round rod 354 is fixedly connected with the frame plate 340, the pressing plate 350 is pressed downwards on the basis of the frame plate 340, and presses and fixes the cotton swab head on the needle hole, realize replacing the handheld cotton swab of long-time to press down hemostasis to the pinhole, the slip through subplate 321 and cover joint board 310 cup joints and cup joints board 310 and is connected with slider 330's rotation, make oppression mechanism 300 can adapt to the distance between two arm boards 120, make framed lamella 340 and arm contact laminating through telescopic link 342 and extrusion spring 343, oppression board 350 extrudees downwards on framed lamella 340's basis, thereby make oppression board 350 the arm to different thicknesses its dynamics of pressing the cotton swab head the same, thereby avoid oppressing board 350 press the pressure degree too big or undersize.

Round hole 322 has been seted up to the top surface of medium plate 320, dead man 353 has been linked firmly in the middle of the top surface of oppression plate 350, upwards stimulate dead man 353, thereby it breaks away from with the arm to make oppression plate 350 shift up with frame plate 340, conveniently remove oppression mechanism 300, the inside wall of arm plate 120 has linked firmly inner liner 128, and the thickness of inner liner 128 is unanimous with the thickness of tightening plate 242, the setting of inner liner 128 can keep warm to the arm at the dialysis in-process, it catches a cold to reduce the arm, the convenient receipts of tightening plate 242 are inlayed simultaneously, make things convenient for tightening plate 242 to break away from the extrusion with the arm, the interior profile of square hole 341 is the same with the outline of oppression plate 350, avoid oppression plate 350 to interfere with frame plate 340, make things convenient for oppression plate 350 to shift up.

The working principle is as follows: when the device is used, the part to be punctured of the arm of a patient is placed between the two arm plates 120 upwards, the part to be punctured of the arm is aligned with the placement groove 122 of the arm plate 120, the bidirectional screw 112 is rotated, the bidirectional screw 112 drives the two arm plates 120 to move towards the middle along the bottom plate 110 through screwing connection with the internal thread sleeve 125, when the arm plates 120 move, one end of the pull rope pulls the slider 210 to move towards the pulley 126 along the arc groove 124, the slider 210 drives the tightening plate 242 to deflect downwards, the tightening plate 242 is firstly contacted with the arm through the support of the insertion rod 240 and the return spring II 243, in the process that the two arm plates 120 are mutually closed, the pressure and the friction force between the tightening plate 242 and the skin on the two sides of the part to be punctured of the arm are increased under the pressure of the return spring II 243, the skin contacted with the tightening plate 242 can be driven to move downwards when the tightening plate 242 moves downwards, the lining layer 128 on the arm plates 120 is rotated to be contacted with the arm, thereby realize that two armplates 120 are fixed to the centre gripping of arm, effectively reduce the unconscious removal of arm, two tightening plate 242 drive both sides skin respectively and move down to make the arm treat that the portion skin of puncture is tight, convenient accurate location blood vessel and puncture, the lower needle number of times that reduces.

When the inner liner 128 on the arm plate 120 is in contact with the arm in a fitting manner, the arm presses the tightening plate 242 and enables the tightening plate 242 to be communicated with the insertion rod 240 to move outwards along the sliding sleeve 220, the elastic force of the second return spring 243 is overcome, one end of the insertion rod 240 is moved to the outer side of the limiting ring 230 and exposed, after the arm puncture is completed and the infusion tube is fixed, one end of the insertion rod 240 is pulled outwards, the limiting block 241 at one end of the insertion rod 240 is moved to the outer side of the limiting ring 230, the limiting ring 230 is rotated, the second limiting groove 231 on the limiting ring 230 is staggered with the limiting block 241, the tightening plate 242 is limited and fixed, the tightening plate 242 does not continuously press the skin on the two sides of the arm, the moved-down skin can automatically recover to the position, the tightening plate 242 is prevented from continuously tightening and pressing the skin, the dialysis process is facilitated, and the inner liner 128 can keep the temperature of the arm in the dialysis process, reduce the cold catching on the arms.

The sliding parts 330 at the two ends of the pressing mechanism 300 respectively slide into the second sliding groove 123, the frame plate 340 contacts downwards and presses the arm under the action of the first pressing spring 343, the pressing plate 350 contacts with the arm under the drive of the frame plate 340, the pressing mechanism 300 is matched with the two arm plates 120 to clamp the arm, so as to fix the arm and prevent the arm from separating from the arm plate 120, after the dialysis is completed, the puncture needle is drawn out to press the cotton swab at the position of the pinhole on the arm for hemostasis, the pull rod 353 is pulled upwards to move the pressing plate 350 and the frame plate 340 upwards so as to separate from the arm, the middle plate 320 is moved along the second sliding groove 123 to move the pressing plate 350 to the position above the pinhole and the cotton swab head, the pull rod 353 is released, the frame plate 340 is pressed and attached to the arm, because the bottom end of the round rod 354 is fixedly connected with the frame plate 340, the pressing plate 350 presses downwards on the basis of the frame plate 340, the cotton swab head is fixed on the pinhole by the pressing plate 350, realize replacing the handheld cotton swab of long-time to press down hemostasis to the pinhole, realize carrying out the centre gripping to the arm of different thickness through two slidable arm boards 120, the slip through subplate 321 and cover board 310 cup joints and cup joints board 310 and is connected with slider 330's rotation, make oppression mechanism 300 can adapt to the distance between two arm boards 120, make framed bent 340 and arm contact laminating through telescopic link 342 and extrusion spring 343, oppression board 350 extrudees downwards on framed bent 340's basis, thereby make oppression board 350 the same at its dynamics of pressing the cotton swab head to the arm of different thicknesses, thereby avoid pressing of oppression board 350 to press the pressure degree too big or undersize.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.