Butterfly needle removal device

Abstract

The present application relates to the field of infusion port, disclose a kind of butterfly needle removal device, including fixed mechanism, needle removal mechanism and anti-rebound mechanism, fixed mechanism can be fixed on arm, needle removal mechanism includes clamping block and pull rod, clamping block can be fixed butterfly needle, pull rod is vertically slidingly connected with fixed mechanism, pull rod bottom is connected with clamping block, anti-rebound mechanism includes slider unit, slider unit includes first slider, horizontal spring is arranged between first slider and fixed mechanism, after clamping block moves upward, horizontal spring can make first slider move horizontally to the clamping block directly below, to avoid needle stick injury event occurs.

Description

Technical Field

[0001] This invention relates to the field of infusion ports, and more specifically to a butterfly needle removal device. Background Technology

[0002] A port-a-cath is an intravenous infusion technology, a fully implanted, closed infusion system embedded in the human body. The system involves placing a puncture port in the subcutaneous tissue of the chest wall and suturing it in place. During treatment, a butterfly needle is inserted through the skin into the reservoir of the puncture port, allowing for convenient injection, as well as prolonged continuous infusion and blood collection.

[0003] Port-a-cath are classified into thoracic ports and upper arm ports depending on the puncture site. Upper arm ports are located in the basilic vein of the arm. Compared with thoracic ports, they avoid complications such as pneumothorax, hemothorax, accidental arterial puncture, and catheter clipping syndrome caused by placing the port in the chest.

[0004] However, due to the dense texture of the silicone septum at the top of the infusion port base, after each infusion, the nurse often needs to use force with her right hand to remove the infusion needle while pressing the base with her left thumb and forefinger. Immediately after the needle is removed, the right hand often involuntarily retracts, easily leading to needlestick injuries to the nurse's fingers pressing the base or to the patient's skin at the puncture site.

[0005] Patent CN207012374U discloses an infusion port needle removal device, including an inner cylinder and an outer cylinder, with a return spring between the inner and outer cylinders. The butterfly needle is removed by sliding the inner cylinder upwards along the outer cylinder. This patent has the following drawbacks:

[0006] 1. Because the inner tube is slidably mounted on the outer tube, when the infusion port needle is pulled out, the top wall of the outer tube exerts a reaction force on the inner tube, and the doctor may still slip. Under the action of the reset spring, the inner tube will bounce back along the original path, which will also cause needle stick injury to the patient's arm.

[0007] 2. This patent is not practical. During the needle removal process, one hand needs to hold the patient's arm to prevent the patient from shaking, and the other hand needs to hold the outer tube to fix the sliding trajectory of the inner tube. Another hand is needed to slide the inner tube to remove the butterfly needle. In actual operation, it is impossible to send two people for just one needle removal operation, and one person with one pair of hands cannot complete the above operations. Summary of the Invention

[0008] The present invention aims to provide a butterfly needle removal device that is convenient and practical and can prevent needlestick injuries.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a butterfly needle removal device, comprising a fixing mechanism, a needle removal mechanism, and an anti-rebound mechanism. The fixing mechanism can be fixed on the arm. The needle removal mechanism includes a clamping block and a pull rod. The clamping block can fix the butterfly needle. The pull rod is vertically slidably connected to the fixing mechanism. The bottom of the pull rod is connected to the clamping block. The anti-rebound mechanism includes a slider unit. The slider unit includes a first slider. A horizontal spring is provided between the first slider and the fixing mechanism. After the clamping block moves upward, the horizontal spring can cause the first slider to move horizontally to directly below the clamping block.

[0010] The beneficial effects of this plan are:

[0011] 1. The fixation mechanism can be fixed to the arm, thereby preventing the needle removal mechanism from slipping during the needle removal process, thus avoiding damage to the patient's skin when the butterfly needle is removed. Compared with existing technologies, medical staff only need one hand to fix the removal device and the patient's arm at the same time, and one person can complete the operation, which is convenient and practical.

[0012] 2. Fix the butterfly needle to the clamp block, pull the lever, and the clamp block will move upward through the lever, thereby pulling the butterfly needle out of the patient's skin through the clamp block.

[0013] 3. After the butterfly needle is removed, and the clamping block moves upward, the horizontal spring causes the first slider to move horizontally directly below the clamping block. Even if the medical staff slips and the butterfly needle pierces the patient's skin, the first slider can block the butterfly needle, thereby preventing the butterfly needle from causing needlestick injury to the patient's skin.

[0014] Preferably, as an improvement, the fixation mechanism includes a fixation part and a handheld part. The lower side of the fixation part has a semi-cylindrical notch and a fixation strap. The semi-cylindrical notch and the fixation strap cooperate to fix the fixation part to the arm. The fixation part has a fixation groove on the side closest to the medical staff, and both the needle removal mechanism and the anti-rebound mechanism are located within the fixation groove. The handheld part is located above the fixation part and is cylindrical. This configuration produces the following effects:

[0015] 1. Medical staff use a semi-cylindrical notch and a fixation strap to place the fixation device on the patient's arm to prevent the arm from moving around, thus preventing the butterfly needle from causing secondary damage to the patient's arm during needle removal.

[0016] 2. Medical staff can fix the fixation part and the arm together by holding the hand part and pressing down on it. The operation can be completed by one person, which is convenient and practical.

[0017] 3. The fixing slot is set close to the side of medical staff to facilitate observation of the needle removal process and enable timely response in case of accidents.

[0018] 4. Both the needle removal mechanism and the anti-rebound mechanism are located in the lower fixing groove, which increases the weight of the lower part of the fixing mechanism and forms a self-righting structure to reduce the shaking of the hand and increase the stability of the fixing mechanism during needle removal, preventing the butterfly needle from causing secondary damage to the patient's arm.

[0019] Preferably, as an improvement, the clamping block is plate-shaped with a first slit. One end of the first slit is located at the edge of the clamping block, and the width of the other end gradually decreases, eventually forming a wedge shape. A first spring is fixed to the upper side of the clamping block, and the upper end of the first spring is fixed to the lower end of the hand-held part. With this configuration, the butterfly needle includes a butterfly wing and a steel needle. Before fixing the fixing part to the arm, the clamping block is slid into the space between the arm and the butterfly wing, allowing the steel needle to pass through the slit. The clamping block continues to slide until the slit narrows, thus clamping the steel needle. After the clamping block is pulled out and the butterfly needle is removed, the first spring can reset the clamping block.

[0020] Preferably, as an improvement, the first slider is disposed between the clamping block and the side wall of the fixing groove. A first abutting plate is provided on the side of the first slider near the side wall of the fixing groove. A horizontal spring is disposed between the first abutting plate and the side wall of the fixing groove. A second abutting plate is provided on the side of the first slider near the clamping block, and a third abutting plate is provided on the side of the clamping block near the first slider. A abutting strip is provided on the side wall of the fixing groove, disposed on the side of the clamping block away from the first slider. In the initial state, the second and third abutting plates are horizontally abutting, and the clamping block abuts against the abutting strip. With this configuration, the horizontal spring pushes the first abutting plate, thereby causing the second abutting plate of the first slider to abut against the third abutting plate of the clamping block, which in turn causes the clamping block to abut against the abutting strip. Thus, in the initial state, the clamping block remains horizontal, allowing it to vertically pull out the butterfly needle, preventing the steel needle from tilting and scratching the arm, and protecting the arm from secondary injury.

[0021] Preferably, as an improvement, a pressure block is provided on the upper side of the first slider, and a second slot is provided in the middle of the pressure block. The first slot can be vertically aligned with the second slot, and the width of the second slot is less than the maximum width of the first slot. With this configuration, after the butterfly needle is pulled out, the clamping block rebounds under the action of the first spring, and the clamping block contacts the pressure block. The steel needle is driven by the clamping block to insert into the second slot, so that the lower end of the steel needle is in a suspended state. Since the steel needle is covered with the patient's body fluids and skin tissue after being pulled out, it needs to be treated before it can be recycled according to medical and health regulations. Before that, it is necessary to avoid the steel needle from contacting other items. This solution not only avoids the steel needle from contacting other items, but also prevents the steel needle from inserting into and damaging the first slider after rebounding, thus ensuring the hygiene and durability of the first slider.

[0022] Preferably, as an improvement, a sterile cotton ball is detachably connected to the bottom of the first slider, a vertical groove is provided on the side wall of the fixing groove, the top of the vertical groove is located at the bottom of the handheld part, the slider unit includes a second slider, the second slider is slidably disposed in the vertical groove, a second spring is provided between the top of the second slider and the bottom of the handheld part, and a horizontal spring is connected to the fixing groove through the second slider. This arrangement can produce the following effects:

[0023] 1. After removing the butterfly needle, it is usually necessary to press the patient's wound with a sterile cotton ball for a few minutes to prevent bleeding and speed up wound healing. However, this procedure fixes the removal device to the patient's arm. The arm will move during the removal of the removal device, which will accelerate the bleeding of the wound. Therefore, it is necessary to press the wound before removing the removal device to promote wound healing.

[0024] 2. After the butterfly needle is removed, the first spring causes the clamping block to rebound downwards, which in turn exerts downward pressure on the first slider. The first slider causes the second slider to move downwards, and the vertical groove guides the second slider, thus ensuring that the sterile cotton ball under the first slider is horizontally attached to the patient's wound. At this time, the medical staff presses down through the pull rod, and then transmits the pressure to the sterile cotton ball through the clamping block, the pressure-bearing block, and the first slider, thereby adjusting the pressure to press on the patient's wound.

[0025] 3. After the patient's wound has healed, pull the lever upward to release the pressure. The second spring drives the second slider to rise, which in turn drives the first slider to rise, thus causing the sterile cotton ball to leave the patient's wound.

[0026] Preferably, as an improvement, the first slider is provided with arc-shaped baffles on both sides, each baffle including an arc-shaped surface. The anti-rebound mechanism also includes two reset units, which are symmetrically arranged on both sides of the first slider. Each reset unit includes a first rocker arm, which is horizontally rotatable within a fixed groove. After the first slider moves to directly below the clamping block, the first rocker arm engages with the arc-shaped surface, thereby rotating forward and pushing the first slider back to its initial position. This arrangement produces the following effects:

[0027] 1. After the patient's wound has healed, drive the first rocker arm to rotate forward. The first rocker arm cooperates with the arc-shaped baffle to push the first slider to move horizontally. The second spring drives the second slider to rise, which in turn drives the first slider back to its initial position. At this time, the clamping block also returns to its initial position under the action of gravity. Remove the butterfly needle on the clamping block and the sterile cotton ball at the bottom of the first slider for the next use of the needle removal device.

[0028] 2. The first slider is prone to tilting during its up-and-down sliding, which prevents the clamp from returning to its initial position under the influence of gravity. In this solution, the first rockers on both sides of the first slider interact with the arc-shaped surface, thereby generating a pushing force on the first slider to straighten the tilted slider. Specifically, the direction of horizontal movement of the first slider is defined as the direction of movement. Since the trajectory of the end of the first rocker is arc-shaped, the first rocker not only generates a first horizontal force parallel to the direction of movement, thus returning the first slider to its initial position, but also generates a second horizontal force perpendicular to the direction of movement. Under the combined action of the symmetrical second horizontal forces on both sides of the first slider, the tilted first slider is straightened.

[0029] Preferably, as an improvement, the sidewall of the fixing groove includes a limiting part that can restrict the first slider directly below the clamping block. The arc-shaped baffle includes a flat surface, and the first rocker arm, when rotated in the opposite direction, can push the flat surface and the limiting part to engage, thereby clamping the first slider. This configuration produces the following effects:

[0030] 1. After the butterfly needle is removed, the first slider moves horizontally to directly below the clamping block, drives the first rocker arm to rotate in the opposite direction, and pushes the flat surface. The flat surface and the limiting part clamp the first slider, thereby reducing the impact force of the clamping block rebounding under the action of the first spring. This reduces the impact force transmitted to the handle through the pressure-bearing part and the first slider, thus preventing discomfort in the patient's arm.

[0031] 2. If the side of the first slider near the limiting part tilts downward due to lack of support, the edge of the first slider near the limiting part will preferentially contact the patient's arm, resulting in a small contact area and thus high pressure, which in turn causes discomfort to the patient's arm. In this solution, under the clamping action of the flat surface and the limiting part, the first slider at the limiting part provides vertical friction, the first slider falls horizontally, and the lower surface of the first slider contacts the arm simultaneously, resulting in lower pressure and greater patient comfort.

[0032] Preferably, as an improvement, the anti-rebound mechanism further includes two pressing units, which are located on both sides of the clamping block. Each pressing unit includes a second rocker arm, which is vertically rotatable within a fixed groove. The end of the second rocker arm has a triangular portion, the tip of which can press the middle position of the butterfly needle downwards. With this configuration, since the sterile cotton ball needs to be pressed for several minutes, if medical staff are too busy, they can drive the second rocker arm. The tips of the triangular portions on both sides of the clamping block simultaneously press the middle position of the butterfly needle downwards. At the same time, the sides of the triangular portions and the sidewalls of the first clamping slit squeeze the butterfly wings, generating a downward frictional force on the butterfly wings, thereby pressing the sterile cotton ball. At this time, medical staff do not need to press the sterile cotton ball by pulling the lever, thus freeing up one hand and improving the efficiency of medical staff. Attached Figure Description

[0033] Figure 1 This is a top view of Example 1;

[0034] Figure 2 for Figure 1 Sectional view of section AA;

[0035] Figure 3 for Figure 2 Sectional view of section BB;

[0036] Figure 4 for Figure 3 Enlarged view of the first slider and clamping block;

[0037] Figure 5 This is a three-dimensional isometric view of the first slider in Example 1;

[0038] Figure 6 for Figure 3 Sectional view of the C-section;

[0039] Figure 7 In Example 1, when the first slider moves to directly below the clamping block, Figure 3 Sectional view of section DD;

[0040] Figure 8 In Example 2, corresponding to Figure 3 A sectional view of the location of section DD in the middle section;

[0041] Figure 9 This is a front view of a butterfly needle. Detailed Implementation

[0042] The following detailed description illustrates the specific implementation method:

[0043] The reference numerals in the accompanying drawings include: butterfly needle 1, steel needle 101, butterfly wing 102, fixing part 2, clamping strip 210, third slot 211, semi-cylindrical notch 201, fixing strap 202, buckle 203, card seat 204, main cavity 205, reset cavity 206, limiting part 207, vertical groove 208, pressing cavity 209, handheld part 3, pull rod 401, clamping block 402, first spring 403, first clamp 404 seam, 405 third abutment plate, 5 first slider, 510 arc-shaped baffle, 511 arc-shaped surface, 512 flat surface, 520 first abutment plate, 530 second abutment plate, 540 pressure block, 541 second gap, 6 second slider, 601 second spring, 602 horizontal spring, 701 first rotating shaft, 702 first rocker arm, 703 free end, 801 second rotating shaft, 802 second rocker arm, 803 triangular part.

[0044] Example 1

[0045] Example 1 is basically as follows Figure 1-7As shown: A butterfly needle removal device includes a fixing mechanism, a needle removal mechanism, and an anti-rebound mechanism. The object to be removed is, for example, a butterfly needle removal device. Figure 9 The butterfly needle 1 shown includes a steel needle 101 and a butterfly wing 102. For ease of display, Figure 6 and Figure 7 Only the profile lines of the fixed mechanism are displayed.

[0046] like Figure 1 As shown, the fixation mechanism includes a fixing part 2 and a handheld part 3. The fixing part 2 is a cuboid, and the handheld part 3 is a cylinder, so that medical personnel can easily hold the handheld part 3 with one hand. Figure 2 As shown, a horizontally oriented semi-cylindrical notch 201 is provided on the lower side of the fixing part 2. A fixing strap 202 and a retainer 204 are respectively fixed to the lower sides of the fixing part 2 on the left and right sides of the semi-cylindrical notch 201. A buckle 203 is provided at the right end of the fixing strap 202, which can engage with the retainer 204. The fixing strap 202 is elastic, and the semi-cylindrical notch 201 and the fixing strap 202 cooperate to fix the fixing part 2 to the arm. A fixing groove is provided on the side of the fixing part 2 closest to the medical staff. Figure 3 As shown, the fixing groove includes a main cavity 205 and two reset cavities 206. Both reset cavities 206 are horizontally arranged discs, symmetrically positioned on both sides of the main cavity 205. The portion between the reset cavities 206 and the main cavity 205 forms a limiting part 207, which restricts the movement range of the anti-rebound mechanism. Both the needle removal mechanism and the anti-rebound mechanism are located within the main cavity 205. Figure 2 As shown, the main cavity 205 vertically penetrates the fixing part 2, and the upper end of the main cavity 205 is located at the bottom of the handheld part 3, as... Figure 3 As shown, a vertical groove 208 is opened on the upper side of the main cavity 205, and the opening of the main cavity 205 faces downward, that is, the side closer to the medical staff, so that the medical staff can observe the needle removal process and react in time in case of an accident. A retaining strip 210 is provided on the lower side of the bottom of the main cavity 205, and a third slot 211 for the steel needle 101 to pass through is opened in the middle of the retaining strip 210.

[0047] The needle removal mechanism is located inside the main cavity 205, such as Figure 2 As shown, it includes a clamping block 402 and a pull rod 401. The pull rod 401 is vertically slidably connected to both the fixing part 2 and the handheld part 3. The top of the pull rod 401 extends beyond the top of the handheld part 3, and the bottom of the pull rod 401 is welded to the clamping block 402. Two first springs 403 are welded to the upper side of the clamping block 402, and the upper ends of the two first springs 403 are welded to the lower side of the handheld part 3. The clamping block 402 can fix the butterfly needle 1, as shown. Figure 3 , Figure 4 As shown, the clamping block 402 is plate-shaped, and a first clamping slot 404 is opened on the clamping block 402. The lower end of the first clamping slot 404 is located at the edge of the clamping block 402, and the width of the upper end of the first clamping slot 404 gradually decreases, eventually forming a wedge shape. A third abutting plate 405 is provided on the upper side of the clamping block 402.

[0048] The anti-rebound mechanism includes a slider unit and two reset units. The slider unit includes a first slider 5 and a second slider 6. The second slider 6 is slidably disposed within the vertical groove 208. Two second springs 601 are welded onto the second slider 6. Figure 6 As shown, the upper ends of both second springs 601 are welded to the bottom of the handheld part 3, as... Figure 4 As shown, two horizontal springs 602 are welded to the lower side of the second slider 6, and an arc-shaped baffle 510 is welded to the left and right sides of the first slider 5. The lower side of the arc-shaped baffle 510 is an arc-shaped surface 511, and the upper side is a flat surface 512. The first slider 5 has a first abutting plate 520 and a second abutting plate 530 welded to the upper and lower sides, respectively. The lower ends of the two horizontal springs 602 are welded to the first abutting plate 520. In the initial state, the second abutting plate 530 and the third abutting plate 405 abut against each other in the horizontal direction, and the clamping block 402 abuts against the abutting strip 210. A pressure block 540 is welded in the middle of the first slider 5. A second slit 541 is opened in the middle of the pressure block 540. The width of the second slit 541 is smaller than that of the first slit 404. A sterile cotton ball (not shown in the figure) is attached to the bottom of the first slider 5.

[0049] After the butterfly needle 1 is pulled out, the second abutment plate 530 and the third abutment plate 405 no longer abut against each other. The horizontal spring 602 pushes the first slider 5 until the first slider 5 abuts against the limiting part 207. At this time, as Figure 7 As shown, the first slider 5 is located directly below the clamping block 402, and the first clamping slot 404 and the second clamping slot 541 are vertically aligned. For ease of display, Figure 7 The lever 401 and the first spring 403 are omitted.

[0050] like Figure 3 As shown, two reset units are respectively disposed in two reset cavities 206. Each reset unit includes a first rotating shaft 701, a first motor, and a first rocker arm 702. Taking the left-hand rocker arm 702 as an example, the first motor is bolted to the side wall of the reset cavity 206 (not shown in the figure). The output shaft of the first motor is welded to one end of the first rotating shaft 701, and the other end of the first rotating shaft 701 is horizontally rotatably connected to the side wall of the reset cavity 206. One end of the first rocker arm 702 is welded to the first rotating shaft 701, and the other end is a free end 70. 3. The free end 703 rotates counterclockwise for forward rotation. At this time, the free end 703 can push the arc surface 511 to move upward. Even if the first slider 5 returns to the initial position, the free end 703 rotates clockwise for reverse rotation. The free end 703 can push the flat surface 512 to move downward, that is, cooperate with the limiting part 207 to clamp the first slider 5. The first motor is a servo motor, model Louis Vuitton 12V micro servo motor. The first motor can drive the free end 703 to rotate in reverse and also drive the free end 703 to rotate in forward.

[0051] To fit the patient's arm, the lower side of the clamping block 402 and the lower side of the first slider 5 are both arc-shaped, and the upper surface of the pressure block 540 is an inclined or arc-shaped surface that matches the shape of the lower side of the clamping block 402.

[0052] The specific implementation steps are as follows:

[0053] 1. Slide the clamping block 402 into the space between the arm and the butterfly wing 102, so that the steel needle 101 passes through the third gap 211 and the first gap 404 in sequence. Continue to slide the clamping block 402 until the width of the first gap 404 decreases, thereby clamping the steel needle 101. After the clamping block 402 is pulled out and the butterfly needle 1 is removed, the first spring 403 can reset the clamping block 402.

[0054] 2. By fixing the fixation mechanism to the arm, medical staff only need one hand to simultaneously fix the removal device and the patient's arm, and one person can complete the operation.

[0055] 3. The free end 703 is driven to rotate in the opposite direction by the first motor, which pulls the lever 401. The lever 401 drives the clamping block 402 to move upward, and then the clamping block 402 pulls the butterfly needle 1 out of the patient's skin.

[0056] 4. After the butterfly needle 1 is pulled out, that is, after the clamping block 402 moves upward, the second abutting plate 530 and the third abutting plate 405 no longer abut against each other. The horizontal spring 602 pushes the first slider 5 to move horizontally to directly below the clamping block 402. The free end 703 pushes the flat surface 512 and the limiting part 207 to cooperate and clamp the first slider 5. At the same time, the clamping block 402 rebounds under the action of the first spring 403. The clamping block 402 exerts downward pressure on the first slider 5 through the pressure block 540. At the same time, the steel needle 101 is inserted into the second gap 541 under the action of the clamping block 402, so that the lower end of the steel needle 101 is in a suspended state.

[0057] 5. The first slider 5 drives the second slider 6 to move downwards. The vertical groove 208 guides the second slider 6. The first slider 5 drives the sterile cotton ball to press down on the wound on the arm. Medical staff control the pressure channel through the lever 401. The transmission path of the pressure channel is: lever 401, clamp 402, pressure block 540, first slider 5, sterile cotton ball and wound.

[0058] 6. After the wound heals, the free end 703 is driven to rotate forward by the first motor. The free end 703 pushes the arc-shaped surface 511 to move horizontally, and the first spring 403 drives the second slider 6 to move vertically, thereby causing the first slider 5 to return to its original position. Figure 3 and Figure 6 At the same time, the clamping block 402 returns to its initial position under the action of gravity, and the butterfly needle 1 and the sterile cotton ball at the bottom of the first slider 5 are removed from the clamping block 402 so that the needle removal device can be used next time.

[0059] Example 2

[0060] Example 2 is basically as follows Figure 8 As shown, based on Embodiment 1: the fixing groove further includes two pressing cavities 209, both of which are vertically fan-shaped and located above the reset cavity 206. The anti-rebound mechanism also includes two pressing units, which are respectively located in the pressing cavities 209. Each pressing unit includes a second rotating shaft 801, a second motor, and a second rocker arm 802. The second motor is the same model as the first motor. The second motor is bolted to the side wall of the pressing cavity 209 (not shown in the figure). The output shaft of the second motor is welded to one end of the second rotating shaft 801. The other end of the second rotating shaft 801 is vertically rotatably connected to the side wall of the pressing cavity 209. One end of the second rocker arm 802 is welded to the second rotating shaft 801, and the other end is provided with a triangular part 803. The handheld part 3 is provided with a control button (not shown in the figure). Pressing the control button can control the second motor to drive the second rotating shaft 801 to rotate.

[0061] Since the disinfectant cotton ball needs to be pressed for several minutes, if medical staff are too busy, they can press the second control button to drive the second rocker 802. The tips of the triangular parts 803 on both sides of the clamping block 402 simultaneously press the middle position of the butterfly needle 1 downward. The butterfly wings 102 on both sides of the butterfly needle 1 tilt upward under the reaction force of the side wall of the first clamping slit 404. At the same time, the side of the triangular part 803 and the side wall of the first clamping slit 404 squeeze the butterfly wings 102. The side of the triangular part 803 and the side wall of the first clamping slit 404 generate a downward friction force on the butterfly wings 102, thereby pressing the disinfectant cotton ball. At this time, medical staff do not need to press the disinfectant cotton ball through the lever 401, thus freeing up one hand and improving the efficiency of medical staff.

[0062] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A butterfly needle removal device, characterized in that: It includes a fixing mechanism, a needle removal mechanism, and an anti-rebound mechanism. The fixing mechanism can be fixed to the arm. The needle removal mechanism includes a clamping block and a pull rod. The clamping block can fix the butterfly needle. The pull rod is vertically slidably connected to the fixing mechanism. The bottom of the pull rod is connected to the clamping block. The anti-rebound mechanism includes a slider unit. The slider unit includes a first slider. A horizontal spring is provided between the first slider and the fixing mechanism. After the clamping block moves upward, the horizontal spring can make the first slider move horizontally to directly below the clamping block. The first slider has a pressure block on its upper side, and a second gap is provided in the middle of the pressure block. The first gap can be vertically aligned with the second gap, and the width of the second gap is less than the maximum width of the first gap. The bottom of the first slider is detachably connected to a disinfectant cotton ball. A vertical groove is provided on the side wall of the fixing groove. The top of the vertical groove is located at the bottom of the handheld part. The slider unit includes a second slider. The second slider is slidably disposed in the vertical groove. A second spring is provided between the top of the second slider and the bottom of the handheld part. The horizontal spring is connected to the fixing groove through the second slider. After the butterfly needle is removed, and the clamping block moves upward, the second and third clamping plates no longer abut against each other. The horizontal spring pushes the first slider to move horizontally directly below the clamping block. At the same time, the clamping block rebounds under the action of the first spring, and the clamping block exerts downward pressure on the first slider through the pressure block. Meanwhile, the steel needle is inserted into the second clamping gap under the action of the clamping block, so that the lower end of the steel needle is suspended in the air. The first slider moves the sterile cotton ball down to press on the wound on the arm, and the medical staff controls the pressure channel through the lever. The first slider is provided with arc-shaped baffles on both sides. The arc-shaped baffles include arc-shaped surfaces. The anti-rebound mechanism also includes two reset units. The two reset units are symmetrically arranged on both sides of the first slider. Each reset unit includes a first rocker arm. The first rocker arm is horizontally rotatably arranged in the fixed groove. After the first slider moves to the bottom of the clamping block, the first rocker arm can cooperate with the arc-shaped surface and then rotate forward to push the first slider back to the initial position. The side wall of the fixed groove includes a limiting part that can restrict the first slider to be directly below the clamping block. The arc-shaped baffle includes a flat surface. The first rocker arm can rotate in the opposite direction to push the flat surface and the limiting part to cooperate, thereby clamping the first slider.

2. The butterfly needle removal device according to claim 1, characterized in that: The fixation mechanism includes a fixation part and a handheld part. The lower side of the fixation part has a semi-cylindrical notch and a fixation strap. The semi-cylindrical notch and the fixation strap work together to fix the fixation part to the arm. The fixation part has a fixation groove on the side of the fixation part closer to the medical staff. The needle removal mechanism and the anti-rebound mechanism are both set in the fixation groove. The handheld part is set above the fixation part and is cylindrical.

3. The butterfly needle removal device according to claim 2, characterized in that: The clamping block is plate-shaped and has a first clamping slot. One end of the first clamping slot is located at the edge of the clamping block, and the width of the other end of the first clamping slot gradually decreases, eventually forming a wedge shape. A first spring is fixed on the upper side of the clamping block, and the upper end of the first spring is fixed to the lower end of the hand-held part.

4. The butterfly needle removal device according to claim 3, characterized in that: The first slider is disposed between the clamping block and the side wall of the fixing groove. The first slider is provided with a first abutting plate on the side of the fixing groove near the side wall of the fixing groove. A horizontal spring is disposed between the first abutting plate and the side wall of the fixing groove. The first slider is provided with a second abutting plate on the side of the clamping block near the side wall of the clamping block. A third abutting plate is provided on the side wall of the fixing groove. Abutting strip is disposed on the side of the clamping block away from the first slider. In the initial state, the second abutting plate and the third abutting plate abut against each other in the horizontal direction, and the clamping block abuts against the abutting strip.

5. The butterfly needle removal device according to claim 1, characterized in that: The anti-rebound mechanism also includes two clamping units, which are located on both sides of the clamping block. Each clamping unit includes a second rocker arm, which is vertically rotatable in a fixed groove. The end of the second rocker arm is provided with a triangular part, the tip of which can press the middle position of the butterfly needle downward.

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