Blood extraction equipment for primary auxiliary examination of liver cancer

Abstract

The invention relates to the technical field of blood extraction, and discloses blood extraction equipment for preliminary auxiliary examination of liver cancer, which comprises a base, an arc-shaped cushion fixedly arranged at the top of the base, a cavity formed in the bottom of the base, two fixing belts movably arranged at the top of the base and symmetrically distributed, and a fixing unit arranged on the base, the fixing unit comprises a winding component and a buffering component which are arranged on the base. According to the blood extraction equipment for the preliminary auxiliary examination of the liver cancer, by rotating a rocker, driving a rotating disc and a winding shaft to rotate, driving two winding rollers to rotate, winding a fixing belt on the winding rollers, tightening the fixing belt and tightening the arm of a patient, the situation that the patient swings and shakes during blood extraction, and the blood extraction difficulty of medical staff is increased is avoided; meanwhile, multiple times of blood drawing may increase pain and discomfort of a patient and increase safety risks faced by medical staff, for example, the patient is accidentally injured by a needle, and threats are caused to the body health of the medical staff.

Description

Technical Field

[0001] The present invention relates to the technical field of blood extraction, and in particular to a blood extraction device for preliminary auxiliary examination of liver cancer. Background Art

[0002] The purpose of blood test is to understand the background of hepatitis B, because 90% of Chinese primary liver cancer have a background of hepatitis B. The patient's liver function, hepatitis B two-and-a-half, HBV-DNA, that is, the replication of hepatitis B virus, are checked to confirm whether the patient has a background of hepatitis B. In addition, blood draws can also understand the patient's tumor indicators, including whether alpha-fetoprotein is abnormal, etc. If the indicators are significantly elevated, it also supports the diagnosis of liver cancer. Venous blood collection is the most common blood collection method for routine examinations in hospitals. Venous blood collection is to draw a certain amount of venous blood through a blood collection needle as a blood sample for medical testing. Venous blood collection uses a disposable blood collection needle. The disposable blood collection needle is composed of a venous needle, a front needle seat, a rear needle seat, and a blood collection needle through a hose. The venous needle punctures into the vein, and the blood collection needle is inserted into the negative pressure blood collection tube. Under the action of the negative pressure blood collection tube, the blood sample enters the negative pressure blood collection tube.

[0003] A blood drawing device is disclosed in the patent publication number CN216907978U, which adjusts the insertion angle of the blood drawing needle through a servo motor, and then the driving mechanism drives the blood drawing needle to move to the blood vessel in the patient's arm and insert it. After the insertion, the linear driving device inserts the tail needle corresponding to the blood drawing needle into the vacuum blood collection tube, and the blood is sucked into the vacuum blood collection tube under the action of the negative pressure in the vacuum blood collection tube. After the blood collection is completed, the driving mechanism extracts the blood drawing needle from the patient's blood vessel, and the linear driving device pulls the tail needle out of the vacuum blood collection tube.

[0004] The existing patents have the following defects:

[0005] When drawing blood for testing, especially for those with mental illness, there may be cases of non-cooperation during blood drawing; when the patient does not cooperate with blood drawing, if there is no device to fix the arm, the patient's hand may swing or shake when blood is drawn, which will make it difficult for medical staff to accurately find a suitable blood vessel for puncture, increasing the difficulty of blood drawing. Multiple blood draws may increase the pain and discomfort of the patient; in the case of patient non-cooperation, medical staff may face greater safety risks, such as accidental injury by needles, posing a threat to the health of medical staff. And when the patient's body or arm moves randomly, the patient may cause tissue coagulation factors to mix into the blood drawing tube due to poor blood flow, causing platelet aggregation, destruction, and even microclotting; the patient's constant movement during blood drawing may lead to elevated hormones, resulting in an increase in white blood cells in the sample, affecting the judgment of clinicians. Summary of the invention

[0006] In view of the problem in the prior art that it is difficult to draw blood when the patient does not cooperate, a blood drawing device for preliminary auxiliary examination of liver cancer is proposed.

[0007] The present application provides a blood extraction device for preliminary auxiliary examination of liver cancer, the purpose of which is to solve the problem that the patient's non-cooperation during the blood collection process may affect the judgment of the clinician and increase the difficulty and risk of operation for medical workers.

[0008] The technical solution of the present invention is: a blood extraction device for preliminary auxiliary examination of liver cancer, comprising a base, an arc-shaped cushion fixedly arranged on the top of the base, a cavity opened at the bottom of the base, and two symmetrically distributed fixing belts movably arranged on the top of the base, and also comprising a fixing unit arranged on the base;

[0009] The fixing unit includes a winding component and a buffer component arranged on the base, the winding component includes a winding assembly arranged in the cavity, and a fixing assembly arranged on one side of the top of the base;

[0010] The winding assembly includes a winding shaft rotatably connected to the inner side of the cavity, two winding rollers are fixedly sleeved on the shaft wall of the winding shaft, one end of two fixing belts are respectively fixedly wrapped around the outside of the two winding rollers, one end of the winding shaft passes through the inner wall of the cavity and extends to the outside of the cavity and is rotatably connected to a turntable, and a rocker is fixedly connected to the side of the turntable away from the winding shaft.

[0011] Furthermore, the fixing assembly includes two symmetrically distributed first through holes opened on the base and connected to the inner side of the cavity, the inner sides of the two first through holes are fixedly connected to fixing rollers, and the two fixing belts are fixedly connected to the outer sides of the two fixing rollers at one end away from the winding roller.

[0012] Furthermore, the winding component further includes a transmission assembly arranged on one side of the base, and a first limit assembly arranged on the shaft wall of the winding shaft;

[0013] The transmission assembly includes a fixed cylinder fixedly connected to the side wall of the base, a fixed ring fixedly connected to the inner side of the fixed cylinder, a transmission block is slidably connected to the top of the fixed ring on the shaft wall of the winding shaft, a first spring is sleeved on the bottom of the fixed ring on the shaft wall of the winding shaft, one end of the first spring passes through the fixed ring and is rotatably connected to the transmission block, the other end of the first spring is fixedly connected to the side wall of the base, two symmetrically distributed V-shaped grooves are opened on the top of the transmission block, two symmetrically distributed V-shaped blocks are fixedly connected to the bottom of the turntable, the two V-shaped blocks are respectively slidably connected to the inner sides of the two V-shaped grooves, an outer gear ring is fixedly connected to the top side wall of the transmission block, an inner gear ring is fixedly connected to the inner top of the fixed cylinder, the outer gear ring and the inner gear ring are meshed with each other, and the top and bottom of the teeth of the outer gear ring and the inner gear ring are both arranged in a V-shaped structure.

[0014] Furthermore, the first limiting assembly includes two symmetrically distributed first limiting grooves opened on the shaft wall of the winding shaft, the inner sides of the two first limiting grooves are slidably connected with first limiting blocks, and the two first limiting blocks are fixedly connected to the transmission block.

[0015] Furthermore, the buffer component includes a guide assembly arranged on the base, a pushing assembly arranged on the inner side of the guide assembly, a clamping assembly arranged on one side of the pushing assembly, and a second limiting assembly arranged on the clamping assembly;

[0016] The guide assembly includes two symmetrically distributed second through holes opened on the base and connected to the inner side of the cavity, fixed guide rollers are rotatably connected to the inner sides of the two second through holes, two symmetrically distributed slide grooves are opened on the inner sides of the two second through holes, sliders are slidably connected to the inner sides of the multiple slide grooves, a movable guide roller is rotatably connected between the two opposing sliders, and a fixed belt passes between the fixed guide roller and the movable guide roller.

[0017] Furthermore, the pushing assembly includes a pushing rod fixedly connected to one of the sliders, a second spring is sleeved on the wall of the pushing rod, one end of the second spring is fixedly connected to the slider, the other end of the second spring is fixedly connected to the inner wall of the slide groove, a pushing groove is provided on the inner wall of the second through hole, the end of the pushing rod away from the slider is slidably connected to the inner side of the pushing groove, a first inclined surface is provided at one end of the pushing rod located on the inner side of the pushing groove, a pushing cavity connected to the inner side of the pushing groove is provided on the base, a connecting rod is slidingly connected to the inner side of the pushing cavity, second inclined surfaces are provided at both ends of the connecting rod, one end of the connecting rod extends to the inner side of the pushing groove, and one of the second inclined surfaces is slidably connected to the first inclined surface.

[0018] Furthermore, the clamping assembly includes a sliding groove opened on the inner side of the second through hole and connected to the inner side of the pushing cavity, a clamping rod is connected to the inner side of the sliding groove in a limited sliding manner, a fixing plate is fixedly connected to the rod wall of the clamping rod, a reset spring is fixedly connected between the fixing plate and the inner wall of the second through hole, the reset spring is sleeved on the outer side of the clamping rod, a third inclined surface is opened at one end of the clamping rod, a fourth inclined surface is opened at the other end of the clamping rod, the fourth inclined surface is slidably connected to the other second inclined surface, a plurality of evenly distributed clamping holes are opened on the fixing belt, and the end of the clamping rod away from the sliding groove is clamped to the inner side of one of the clamping holes.

[0019] Furthermore, the second limiting assembly includes a second limiting groove opened inside the sliding groove, a second limiting block is slidably connected inside the second limiting groove, and the second limiting block is fixedly connected to the wall of the clamping rod.

[0020] Beneficial effects of the present invention:

[0021] 1. By placing the patient's arm on the curved soft cushion, the curved soft cushion can protect the patient's arm. One end of the fixing belt is fixed by the fixing roller. The medical staff holds the joystick and rotates the joystick to drive the turntable and the winding shaft to rotate, drive the two winding rollers to rotate, reel the fixing belt on the winding roller, tighten the fixing belt, and tie the patient's arm tightly to prevent the patient from swinging and shaking during blood drawing, which increases the difficulty of blood drawing for medical staff. At the same time, multiple blood drawings may increase the pain and discomfort of the patient, and increase the safety risks faced by medical staff, such as accidental injury by needles, posing a threat to the physical health of medical staff.

[0022] 2. By rotating the rocker, the turntable is driven to rotate, and the two V-shaped blocks are driven to rotate, so that the two V-shaped blocks slide out of the two V-shaped grooves, and the transmission block is driven to slide on the winding shaft, so that the inner gear ring is separated from the outer gear ring, and the first spring is compressed, so that the V-shaped block is completely separated from the V-shaped groove. When the V-shaped block is not completely separated from the V-shaped groove, when the turntable drives the V-shaped block to rotate, with the cooperation of the V-shaped groove, the transmission block is driven to rotate, and the winding shaft is driven to rotate, and then the fixing belt is wound up, so that the patient's arm is tied tightly when blood is drawn, and the patient's arm is loosened after blood is drawn, which reduces the patient's pain during blood drawing and improves the accuracy of blood drawing results.

[0023] 3. The fixed belt will drive the guide roller to move, so that the slider slides in the slide groove, and the slider will drive the push rod to move, compressing the second spring, so that the first inclined surface slides on the second inclined surface, driving the connecting rod to limit the sliding in the push cavity, so that the second inclined surface slides on the fourth inclined surface, and then driving the clamping rod to limit the sliding in the sliding groove, driving the fixed plate to move, so that the reset spring is stretched, so that the clamping rod is away from one end of the sliding groove and is clamped with one of the clamping holes, limiting the position of the fixed belt, so that the fixed belt will not continue to be reeled up, playing a buffering role in the reeling process, avoiding continuous tightening of the fixed belt, which will hurt the patient's arm and cause discomfort to the patient, thereby protecting the patient's arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0025] Figure 2 It is a bottom view structural schematic diagram of the present invention;

[0026] Figure 3 It is a partial cross-sectional structural schematic diagram of the present invention;

[0027] Figure 4 It is a schematic diagram of the partial structure of the buffer component of the present invention;

[0028] Figure 5 It is a schematic diagram of the structure of the fixing unit of the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of the winding assembly of the present invention;

[0030] Figure 7 It is a schematic diagram of the transmission assembly structure of the present invention;

[0031] Figure 8 It is a schematic diagram of the exploded structure of the transmission assembly of the present invention;

[0032] Fig. 9 For the present invention Figure 4 The enlarged structural diagram at A in the middle;

[0033] Fig.10 It is a schematic diagram of the connection structure between the pushing component and the clamping component of the present invention;

[0034] Fig.11 It is a schematic diagram of the exploded structure of the pushing assembly and the clamping assembly of the present invention.

[0035] In the figure:

[0036] 1. Base; 11. Arc cushion; 12. Cavity; 13. Fixed belt; 2. Winding assembly; 21. Winding shaft; 22. Winding roller; 23. Turntable; 24. Rocker; 3. Fixed assembly; 31. Fixed roller; 32. First through hole; 4. Transmission assembly; 41. Fixed cylinder; 42. First spring; 43. Fixed ring; 44. Transmission block; 45. V-shaped groove; 46. V-shaped block; 5. First limit assembly; 51. First limit block; 52. First limit groove; 6. Guide assembly; 61. Moving Guide roller; 62, second through hole; 63, fixed guide roller; 64, slider; 65, slide groove; 7, pushing assembly; 71, pushing rod; 72, second spring; 73, pushing groove; 74, connecting rod; 75, pushing cavity; 76, first inclined surface; 77, second inclined surface; 8, snap-fit ​​assembly; 81, reset spring; 82, fixing plate; 83, snap-fit ​​rod; 84, snap-fit ​​hole; 85, third inclined surface; 86, fourth inclined surface; 9, second limiting assembly; 91, second limiting groove; 92, second limiting block. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0038] Example 1, reference Figure 1-Figure 3 and Figure 5-Figure 8, which is the first embodiment of the present invention, provides a blood extraction device for preliminary auxiliary examination of liver cancer, including a base 1, an arc-shaped cushion 11 fixedly mounted on the top of the base 1, a cavity 12 opened at the bottom of the base 1, and two symmetrically distributed fixing belts 13 movably mounted on the top of the base 1, and also includes a fixing unit mounted on the base 1; the fixing unit includes a winding component and a buffer component mounted on the base 1, the winding component includes a winding assembly 2 installed in the cavity 12, and a fixing assembly 3 installed on one side of the top of the base 1; the winding assembly 2 includes a winding shaft 21 rotatably connected to the inner side of the cavity 12, two winding rollers 22 are fixedly sleeved on the shaft wall of the winding shaft 21, one end of the two fixing belts 13 are respectively fixedly wound around the outside of the two winding rollers 22, one end of the winding shaft 21 passes through the inner wall of the cavity 12 and extends to the outside of the cavity 12 and is rotatably connected to a turntable 23, and a rocker 24 is fixedly connected to the side of the turntable 23 away from the winding shaft 21.

[0039] Specifically, during use, the curved soft pad 11 protects the patient's arm and prevents the patient's arm from directly contacting the base 1, which may easily cause discomfort to the arm. The patient's arm is fixed by the fixing unit to prevent the patient from moving around during blood drawing and affecting the blood drawing result. The fixing belt 13 is rolled up by the winding component, and the fixing belt 13 is buffered by the buffer component during the winding process to prevent the fixing belt 13 from being wound too tightly and causing pain to the patient. The medical staff holds the rocker 24 and rotates the rocker 24 to drive the turntable 23 and the winding shaft 21 to rotate, drive the two winding rollers 22 to rotate, and wind the fixing belt 13 on the winding roller 22, tighten the fixing belt 13, and tie the patient's arm tightly to prevent the patient from swinging and shaking during blood drawing, which increases the difficulty of blood drawing for the medical staff. At the same time, multiple blood drawing may increase the pain and discomfort of the patient, and will increase the safety risks faced by the medical staff, such as accidental injury by the needle, posing a threat to the physical health of the medical staff.

[0040] Reference Figure 2 , Figure 3 and Figure 5 The fixing component 3 includes two symmetrically distributed first through holes 32 opened on the base 1 and connected to the inner side of the cavity 12. The inner sides of the two first through holes 32 are fixedly connected with fixing rollers 31, and the ends of the two fixing belts 13 away from the winding roller 22 are respectively fixedly connected to the outer sides of the two fixing rollers 31.

[0041] Specifically, one end of the fixing belt 13 is fixed by the fixing roller 31, so that when the fixing belt 13 is rolled up, one end of the fixing belt 13 is fixed and the other end is rolled up, so that the fixing belt 13 can quickly tie the patient's arm tightly to prevent the patient from moving around, affecting blood drawing and bringing safety risks to medical staff.

[0042] Example 2, reference Figure 2 and Figure 5-Figure 8 , which is the second embodiment of the present invention, and this embodiment is different from the first embodiment in that: the winding component also includes a transmission assembly 4 installed on one side of the base 1, and a first limiting assembly 5 installed on the shaft wall of the winding shaft 21; the transmission assembly 4 includes a fixed cylinder 41 fixedly connected to the side wall of the base 1, a fixed ring 43 is fixedly connected to the inner side of the fixed cylinder 41, a transmission block 44 is slidably connected to the top of the fixed ring 43 on the shaft wall of the winding shaft 21, and a first spring 42 is sleeved on the bottom of the fixed ring 43 on the shaft wall of the winding shaft 21, and one end of the first spring 42 penetrates The first spring 42 passes through the fixing ring 43 and is rotatably connected to the transmission block 44. The other end of the first spring 42 is fixedly connected to the side wall of the base 1. Two symmetrically distributed V-shaped grooves 45 are provided on the top of the transmission block 44. Two symmetrically distributed V-shaped blocks 46 are fixedly connected to the bottom of the turntable 23. The two V-shaped blocks 46 are respectively slidably connected to the inner sides of the two V-shaped grooves 45. An outer gear ring is fixedly connected to the top side wall of the transmission block 44. An inner gear ring is fixedly connected to the top of the inner side of the fixing cylinder 41. The outer gear ring and the inner gear ring are meshed with each other, and the top and bottom of the teeth of the outer gear ring and the inner gear ring are both arranged in a V-shaped structure.

[0043] Specifically, when in use, the rocker 24 is rotated to drive the rotating disk 23 to rotate, and the two V-shaped blocks 46 are driven to rotate, so that the two V-shaped blocks 46 slide out of the two V-shaped grooves 45, and the transmission block 44 slides on the winding shaft 21, so that the inner gear ring is separated from the outer gear ring, and the first spring 42 is compressed. Under the action of the fixing ring 43, the transmission block 44 is blocked to prevent the transmission block 44 from continuing to slide on the winding shaft 21, so that the V-shaped block 46 is completely separated from the V-shaped groove 45. When the V-shaped block 46 is not completely separated from the V-shaped groove 45, when the rotating disk 23 drives the V-shaped block 46 to rotate, the transmission block 44 is driven to rotate with the cooperation of the V-shaped groove 45. Since the transmission block 44 and the winding shaft 21 are in a limited sliding connection, when the transmission block 44 rotates, it can drive the winding shaft 21 to rotate, and then the fixed belt 13 is wound. Stop rotating the rocker 24. At this time, the first spring 42 resets and drives the transmission block 44 to move away from the fixing ring 43, so that the outer gear ring approaches the inner gear ring. Since the top and bottom of the teeth of the outer gear ring and the inner gear ring are both arranged in a V-shaped structure, the outer gear ring and the inner gear ring can mesh again. Since the fixing cylinder 41 is fixedly connected to the side wall of the base 1, with the cooperation of the inner gear ring and the outer gear ring, the transmission block 44 is limited, and then the winding shaft 21 is limited, so that the winding shaft 21 will not rotate again, and the fixing belt 13 will not be loosened. When the rocker 24 is rotated, the winding shaft 21 is driven to rotate, and the fixing belt 13 will be wound up. When the rocker 24 is stopped, the winding shaft 21 is limited and the fixing belt 13 will not be loosened. The patient's arm is tied tightly when blood is drawn, and the patient's arm is loosened after blood is drawn, which reduces the patient's pain during blood drawing and improves the accuracy of the blood drawing results.

[0044] Reference Figure 8 The first limiting assembly 5 includes two first limiting grooves 52 symmetrically distributed on the shaft wall of the winding shaft 21 , and the inner sides of the two first limiting grooves 52 are slidably connected with first limiting blocks 51 , and the two first limiting blocks 51 are fixedly connected to the transmission block 44 .

[0045] Specifically, the transmission block 44 slides on the winding shaft 21, and the first limit block 51 slides in the first limit groove 52, so that the transmission block 44 slides on the winding shaft 21 within the limit position. When the transmission block 44 rotates, the winding shaft 21 is driven to rotate under the cooperation of the first limit block 51 and the first limit groove 52, so that the rocker 24 is turned, and then the winding shaft 21 is driven to rotate, and the rocker 24 is stopped, so that the winding shaft 21 is limited. The rest of the structure is the same as that of the first embodiment.

[0046] Example 3, reference Figure 3-Figure 5 and Figure 9-11 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: the buffer component includes a guide component 6 installed on the base 1, a pushing component 7 installed on the inner side of the guide component 6, a clamping component 8 installed on one side of the pushing component 7, and a second limiting component 9 installed on the clamping component 8; the guide component 6 includes two symmetrically distributed second through holes 62 opened on the base 1 and connected to the inner side of the cavity 12, the inner sides of the two second through holes 62 are both rotatably connected with fixed guide rollers 63, the inner sides of the two second through holes 62 are each opened with two symmetrically distributed slide grooves 65, the inner sides of the multiple slide grooves 65 are all slidably connected with sliders 64, a movable guide roller 61 is rotatably connected between the two opposing sliders 64, and the fixed belt 13 passes between the fixed guide roller 63 and the movable guide roller 61.

[0047] Specifically, when in use, the fixed guide roller 63 and the movable guide roller 61 cooperate to guide the fixing belt 13 when it is rolled up, so that the fixing belt 13 slides in the second through hole 62, thereby achieving a guiding function of the fixing belt 13 during the process of tightening and loosening, so that the fixing belt 13 can be rolled up in a specific direction, making it easier to tie the fixing belt 13 to the patient's arm.

[0048] Reference Figure 9-10The pushing assembly 7 includes a pushing rod 71 fixedly connected to one of the sliders 64, a second spring 72 is sleeved on the rod wall of the pushing rod 71, one end of the second spring 72 is fixedly connected to the slider 64, the other end of the second spring 72 is fixedly connected to the inner wall of the slide groove 65, a pushing groove 73 is provided on the inner wall of the second through hole 62, the pushing rod 71 is slidably connected to the inner side of the pushing groove 73 at one end away from the slider 64, a first inclined surface 76 is provided at one end of the pushing rod 71 located on the inner side of the pushing groove 73, a pushing cavity 75 communicating with the inner side of the pushing groove 73 is provided on the base 1, a connecting rod 74 is slidingly connected to the inner side of the pushing cavity 75, second inclined surfaces 77 are provided at both ends of the connecting rod 74, one end of the connecting rod 74 extends to the inner side of the pushing groove 73, and one of the second inclined surfaces 77 is slidably connected to the first inclined surface 76.

[0049] Specifically, when in use, when the fixing belt 13 is tied around the patient's arm tighter and tighter, the fixing belt 13 will drive the guide roller 61 to move, so that the slider 64 slides in the slide groove 65, and the slider 64 will drive the push rod 71 to move, compressing the second spring 72, so that the first inclined surface 76 slides on the second inclined surface 77, driving the connecting rod 74 to slide within the push cavity 75, and then pushing the clamping assembly 8 to move, limiting the fixing belt 13, so that the fixing belt 13 will not continue to be reeled in, and playing a buffering role for the fixing belt 13 during the reeling process, so that the fixing belt 13 will not be tied to the patient's arm too tightly, and will not cause pain to the patient.

[0050] Reference Figure 9-10 The clamping assembly 8 includes a sliding groove opened on the inner side of the second through hole 62 and connected to the inner side of the pushing cavity 75. A clamping rod 83 is slidingly connected to the inner side of the sliding groove. A fixing plate 82 is fixedly connected to the rod wall of the clamping rod 83. A reset spring 81 is fixedly connected between the fixing plate 82 and the inner wall of the second through hole 62. The reset spring 81 is sleeved on the outer side of the clamping rod 83. A third inclined surface 85 is opened at one end of the clamping rod 83, and a fourth inclined surface 86 is opened at the other end of the clamping rod 83. The fourth inclined surface 86 is slidingly connected to the other second inclined surface 77. A plurality of evenly distributed clamping holes 84 are opened on the fixing belt 13. The end of the clamping rod 83 away from the sliding groove is clamped to the inner side of one of the clamping holes 84.

[0051] When the arm 72 is in the closed position, the second guide roller 74 is in the closed position, and the second guide roller 74 is in the closed position, so that the arm 72 is in the closed position, and the second guide roller 74 is in the closed position, so that the arm 72 is in the closed position, and the second guide roller 74 is in the closed position, so that the arm 72 is in the closed position, and the arm 72 ... Under the reset action of the second spring 72, the push rod 71 drives the slider 64 to move in the slide groove 65 away from the connecting rod 74. Under the reset action of the reset spring 81, the fixing plate 82 is driven to move close to the connecting rod 74, and then the clamping rod 83 is driven to move away from the fixing belt 13. Under the action of the third inclined surface 85, the clamping rod 83 is separated from the inner side of the clamping hole 84, so that the fixing belt 13 can be loosened, so that the fixing belt 13 can be buffered when it is rolled up, thereby preventing the fixing belt 13 from being continuously tightened, which will hurt the patient's arm and cause discomfort to the patient.

[0052] Reference Figure 9-10 The second limiting assembly 9 includes a second limiting groove 91 opened inside the sliding groove, a second limiting block 92 is slidably connected inside the second limiting groove 91, and the second limiting block 92 is fixedly connected to the rod wall of the clamping rod 83.

[0053] Specifically, when the clamping rod 83 slides in the sliding groove, the second limit block 92 will slide in the second limit groove 91, thereby playing a guiding and limiting role for the clamping rod 83 when sliding, so that the clamping rod 83 will not rotate in a circle when sliding, resulting in changes in the positions of the third inclined surface 85 and the fourth inclined surface 86, thereby affecting the movement and clamping of the clamping rod 83. The rest of the structure is the same as that of Example 2.

[0054] Based on the embodiments 1-3, the working principle of the present invention is as follows: when in use, the patient's arm is placed on the arc-shaped soft cushion 11, and the arc-shaped soft cushion 11 protects and supports the patient's arm. One end of the fixing belt 13 is fixed by the fixing roller 31. The medical staff rotates the rocker 24 to drive the turntable 23 and the winding shaft 21 to rotate, and drives the two winding rollers 22 to rotate, and the fixing belt 13 is wound on the winding roller 22. The fixing belt 13 is tightened and the patient's arm is tied tightly to prevent the patient from swinging and shaking during blood drawing, which increases the difficulty of blood drawing for medical staff. At the same time, multiple blood drawing may increase the pain and discomfort of the patient, and increase the safety risks faced by medical staff, such as accidental injury by the needle, which poses a threat to the health of medical staff.

[0055] The rocker 24 is rotated to drive the rotating disk 23 to rotate, and the two V-shaped blocks 46 are driven to rotate, so that the two V-shaped blocks 46 slide out of the two V-shaped grooves 45, and the transmission block 44 is driven to slide on the winding shaft 21, so that the inner gear ring is separated from the outer gear ring, and the first spring 42 is compressed. Under the action of the fixing ring 43, the transmission block 44 is blocked to prevent the transmission block 44 from continuously sliding on the winding shaft 21, so that the V-shaped block 46 is completely separated from the V-shaped groove 45. When the V-shaped block 46 is not completely separated from the V-shaped groove 45, when the rotating disk 23 drives the V-shaped block 46 to rotate, the transmission block 44 is driven to rotate with the cooperation of the V-shaped groove 45, and the first limit block 51 and the first limit block 51 are connected. With the cooperation of a limiting groove 52, when the transmission block 44 rotates, it can drive the winding shaft 21 to rotate, and then the fixed belt 13 is wound up. After the fixed belt 13 is tightened, the rocker 24 stops rotating. At this time, the first spring 42 is reset, driving the transmission block 44 to move away from the fixed ring 43, so that the outer gear ring approaches the inner gear ring. Since the top and bottom of the teeth of the outer gear ring and the inner gear ring are both arranged in a V-shaped structure, the outer gear ring and the inner gear ring can mesh again. Since the fixed cylinder 41 is fixedly connected to the side wall of the base 1, with the cooperation of the inner gear ring and the outer gear ring, the transmission block 44 is limited, and then the winding shaft 21 is limited, so that the winding shaft 21 will not rotate again.

[0056] The cooperation between the fixed guide roller 63 and the movable guide roller 61 plays a guiding role when the fixing belt 13 is rolled up. When the fixing belt 13 is tied to the patient's arm more and more tightly, the fixing belt 13 will drive the movable guide roller 61 to move, so that the slider 64 slides in the slide groove 65, and the slider 64 will drive the push rod 71 to move, compressing the second spring 72, so that the first inclined surface 76 slides on the second inclined surface 77, driving the connecting rod 74 to limit the sliding in the pushing cavity 75, so that the second inclined surface 77 slides on the fourth inclined surface 86, and then drives the clamping rod 83 to limit the sliding in the sliding groove. When sliding in the sliding groove, the second limit block 92 will slide in the second limit groove 91, and then play a guiding and limiting role for the clamping rod 83 when sliding, so that the clamping rod 83 will not rotate in a circle when sliding, driving the fixing plate 82 to move, so that the reset spring 81 is stretched, so that the clamping rod 83 is clamped with one of the clamping holes 84 away from one end of the sliding groove, and the fixing belt 13 is limited, so that the fixing belt 13 will not continue to be reeled in, and a buffering effect is played on the fixing belt 13 during the reeling process, so as to avoid the fixing belt 13 being continuously tightened, which will hurt the patient's arm and cause discomfort to the patient.

[0057] It should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A blood extraction device for preliminary auxiliary examination of liver cancer, comprising a base (1), an arc-shaped cushion (11) fixedly arranged on the top of the base (1), a cavity (12) opened at the bottom of the base (1), and two symmetrically distributed fixing belts (13) movably arranged on the top of the base (1), characterized in that: It also includes a fixing unit arranged on the base (1); The fixing unit comprises a winding component and a buffer component arranged on the base (1); the winding component comprises a winding assembly (2) arranged in the cavity (12), and a fixing assembly (3) arranged on one side of the top of the base (1); The winding assembly (2) comprises a winding shaft (21) rotatably connected to the inner side of the cavity (12); two winding rollers (22) are fixedly sleeved on the shaft wall of the winding shaft (21); one end of two fixing belts (13) are respectively fixedly wound around the outer sides of the two winding rollers (22); one end of the winding shaft (21) penetrates the inner wall of the cavity (12) and extends to the outer side of the cavity (12) and is rotatably connected to a rotating disk (23); and a rocker (24) is fixedly connected to the side of the rotating disk (23) away from the winding shaft (21).

2. The blood extraction device for preliminary auxiliary examination of liver cancer according to claim 1, characterized in that: The fixing assembly (3) comprises two symmetrically distributed first through holes (32) opened on the base (1) and communicating with the inner side of the cavity (12); the inner sides of the two first through holes (32) are fixedly connected to fixing rollers (31); and the ends of the two fixing belts (13) away from the winding rollers (22) are respectively fixedly connected to the outer sides of the two fixing rollers (31).

3. The blood extraction device for preliminary auxiliary examination of liver cancer according to claim 1, characterized in that: The winding component further comprises a transmission assembly (4) arranged on one side of the base (1), and a first limit assembly (5) arranged on the shaft wall of the winding shaft (21); The transmission assembly (4) comprises a fixed cylinder (41) fixedly connected to the side wall of the base (1), a fixed ring (43) fixedly connected to the inner side of the fixed cylinder (41), a transmission block (44) located on the shaft wall of the winding shaft (21) and slidably connected to the top of the fixed ring (43), a first spring (42) sleeved on the shaft wall of the winding shaft (21) and located at the bottom of the fixed ring (43), one end of the first spring (42) passes through the fixed ring (43) and is rotatably connected to the transmission block (44), and the other end of the first spring (42) is connected to the base (1) The side walls are fixedly connected, two symmetrically distributed V-shaped grooves (45) are opened on the top of the transmission block (44), and two symmetrically distributed V-shaped blocks (46) are fixedly connected to the bottom of the rotating disk (23), and the two V-shaped blocks (46) are respectively slidably connected to the inner sides of the two V-shaped grooves (45), and the top side wall of the transmission block (44) is fixedly connected to an outer gear ring, and the inner top of the fixed cylinder (41) is fixedly connected to an inner gear ring, and the outer gear ring and the inner gear ring are meshed with each other, and the top and bottom of the teeth of the outer gear ring and the inner gear ring are both arranged in a V-shaped structure.

4. The blood extraction device for preliminary auxiliary examination of liver cancer according to claim 3, characterized in that: The first limiting assembly (5) comprises two symmetrically distributed first limiting grooves (52) opened on the shaft wall of the winding shaft (21), the inner sides of the two first limiting grooves (52) are both slidably connected with first limiting blocks (51), and the two first limiting blocks (51) are both fixedly connected to the transmission block (44).

5. The blood extraction device for preliminary auxiliary examination of liver cancer according to claim 1, characterized in that: The buffer component comprises a guide assembly (6) arranged on the base (1), a pushing assembly (7) arranged on the inner side of the guide assembly (6), a clamping assembly (8) arranged on one side of the pushing assembly (7), and a second limiting assembly (9) arranged on the clamping assembly (8); The guide assembly (6) comprises two symmetrically distributed second through holes (62) opened on the base (1) and communicating with the inner side of the cavity (12); a fixed guide roller (63) is rotatably connected to the inner side of each of the two second through holes (62); two symmetrically distributed slide grooves (65) are opened on the inner side of each of the two second through holes (62); a slider (64) is slidably connected to the inner side of each of the plurality of slide grooves (65); a movable guide roller (61) is rotatably connected between two opposing sliders (64); and a fixed belt (13) passes between the fixed guide roller (63) and the movable guide roller (61).

6. The blood extraction device for preliminary auxiliary examination of liver cancer according to claim 5, characterized in that: The pushing assembly (7) comprises a pushing rod (71) fixedly connected to one of the sliders (64); a second spring (72) is sleeved on the rod wall of the pushing rod (71); one end of the second spring (72) is fixedly connected to the slider (64); the other end of the second spring (72) is fixedly connected to the inner wall of the slide groove (65); a pushing groove (73) is provided on the inner wall of the second through hole (62); the end of the pushing rod (71) away from the slider (64) slides with the inner side of the pushing groove (73) The push rod (71) is connected to the push groove (73) at one end thereof and is provided with a first inclined surface (76); a push cavity (75) communicating with the inner side of the push groove (73) is provided on the base (1); a connecting rod (74) is slidably connected to the inner side of the push cavity (75); second inclined surfaces (77) are provided at both ends of the connecting rod (74); one end of the connecting rod (74) extends to the inner side of the push groove (73); one of the second inclined surfaces (77) is slidably connected to the first inclined surface (76).

7. The blood extraction device for preliminary auxiliary examination of liver cancer according to claim 6, characterized in that: The clamping assembly (8) comprises a sliding groove which is provided on the inner side of the second through hole (62) and communicates with the inner side of the pushing cavity (75); a clamping rod (83) is slidably connected to the inner side of the sliding groove; a fixing plate (82) is fixedly connected to the rod wall of the clamping rod (83); a reset spring (81) is fixedly connected between the fixing plate (82) and the inner wall of the second through hole (62); the reset spring (81) is sleeved on the outer side of the clamping rod (83); a third inclined surface (85) is provided at one end of the clamping rod (83); a fourth inclined surface (86) is provided at the other end of the clamping rod (83); the fourth inclined surface (86) is slidably connected to another second inclined surface (77); a plurality of evenly distributed clamping holes (84) are provided on the fixing belt (13); an end of the clamping rod (83) away from the sliding groove is clamped to the inner side of one of the clamping holes (84).

8. The blood extraction device for preliminary auxiliary examination of liver cancer according to claim 7, characterized in that: The second limiting assembly (9) comprises a second limiting groove (91) formed inside the sliding groove, a second limiting block (92) being slidably connected inside the second limiting groove (91), and the second limiting block (92) is fixedly connected to the rod wall of the clamping rod (83).

Images