Anti-puncture device for a port

Abstract

This invention belongs to the field of medical device technology, specifically relating to an anti-puncture device for infusion ports, comprising: a needle holder, on which a needle body is fixedly mounted, the needle holder and the needle body being perpendicular to each other, and a gripping part on the needle holder; a pressing plate, on which a through-hole is formed, and the needle body passing through the through-hole; a connecting rod, one end of which is rotatably mounted on the needle holder and the other end slidably mounted on the pressing plate, wherein when the needle holder moves upward relative to the pressing plate to its maximum position, the free end of the needle body is located within the through-hole; and a sealing mechanism, movably mounted on the pressing plate, the sealing mechanism being drivenly connected to the connecting rod, used to seal the lower part of the through-hole below the needle body after the lower end of the needle body has disengaged from the infusion port injection seat and the patient's skin and entered the through-hole. Its purpose is to solve the problem of needle puncture injuries to medical personnel caused by existing infusion port needle removal methods.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to an anti-puncture device for infusion ports. Background Technology

[0002] An infusion port is a closed infusion device that is completely implanted in the human body. It consists of a catheter with its tip located in the superior vena cava and an injection port implanted under the skin. Currently, for patients with indwelling infusion ports, the procedure for removing the needle requires wearing clean gloves, disinfecting the skin, fixing the injection port injection port with the index, thumb, and middle fingers of the left hand, and removing the needle with the right hand.

[0003] In clinical practice, the flexibility of the infusion port injection seat material creates a certain resistance when removing the needle, requiring a certain amount of force to pull out the non-traumatic needle. After the needle is completely removed, the hand used to remove the needle often rebounds involuntarily due to inertia, which can cause the medical staff to be pricked by the hand that is holding the infusion port injection seat. Summary of the Invention

[0004] The purpose of this invention is to provide an anti-puncture device for infusion ports to solve the problem of medical staff being easily injured by needles due to the existing methods of removing needles from infusion ports.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0006] A puncture prevention device for infusion ports, comprising:

[0007] A needle holder, on which a needle body is fixedly mounted, the needle holder and the needle body being perpendicular to each other, and a gripping part being provided on the needle holder;

[0008] The pressing plate has a through hole, and the needle body is inserted into the through hole;

[0009] A connecting rod, one end of which is rotatably mounted on the needle holder and the other end is slidably mounted on the pressing plate. When the needle holder moves upward relative to the pressing plate to the maximum position, the free end of the needle body is located inside the perforation hole.

[0010] A sealing mechanism is movably mounted on a pressing plate and is connected to a connecting rod for sealing the lower part of the perforation after the lower end of the needle body disengages from the infusion port injection seat and the patient's skin and enters the perforation.

[0011] Further defined, the pressing disc includes a disc body and a connecting arm that are fixedly connected;

[0012] The connecting arm is located above the disk body;

[0013] One end of the connecting rod is slidably mounted on the connecting arm.

[0014] This structural design, through the sliding connection between the connecting arm and the connecting rod, achieves a sliding connection between the connecting rod and the pressing plate. This reduces the structural strength requirements of the plate body, thereby reducing the thickness of the plate body, making it highly practical.

[0015] Further specified, the upper end face of the connecting arm is provided with a receiving groove, and the connecting rod passes through the receiving groove;

[0016] The side wall of the connecting arm is provided with a sliding groove, and the lower end of the connecting rod is fixed with a sliding column, which passes through the sliding groove.

[0017] This structural design, through the cooperation of the connecting rod, receiving groove, sliding column and sliding groove, completes the sliding connection between the connecting arm and the connecting rod. The receiving groove with limited length limits the sliding distance of the sliding column, thereby achieving the purpose of limiting the maximum upward movement distance of the needle seat relative to the pressing plate. The structure is simple, easy to use and highly practical.

[0018] Furthermore, the pressing plate also includes a base fixedly mounted on the pressing plate.

[0019] The perforation extends through both the pressing plate and the base.

[0020] This structural design, through the setting of the base, can increase the overall height of the pressing plate, thereby increasing the length of the perforation. When the needle seat moves upward relative to the pressing plate to its maximum position, the free end of the needle is located inside the perforation, and the sealing mechanism forms a sealing state at the lower end of the perforation, which has a greater fault tolerance. In this way, while meeting the usage requirements, the overall precision requirements of the anti-puncture device are reduced, making it highly practical.

[0021] Furthermore, the base body is provided with a transverse groove;

[0022] The blocking mechanism includes a blocking plate, which is laterally slidably installed in a transverse groove;

[0023] The sealing plate is equipped with a stop block;

[0024] The stop block is located on the movement path of the lower end of the connecting rod.

[0025] This structural design uses a sealing plate that is slidably installed in the transverse groove and a stop block located on the movement path of the lower end of the connecting rod to form a sealing mechanism. During the needle removal process, the lower end of the connecting rod pushes the stop block, causing the sealing plate to seal the lower part of the perforation. The structure is simple, easy to manufacture, and highly practical.

[0026] Furthermore, the sealing plate is provided with elastic teeth and clearance grooves for accommodating the elastic teeth;

[0027] The seat body has a locking notch at the top of the transverse groove that matches the elastic locking teeth;

[0028] The elastic locking teeth are inclined downwards along the direction of movement of the sealing plate.

[0029] This structural design, through the matching of elastic teeth and locking notches, completes the fixation between the sealing mechanism and the pressing plate after the sealing plate forms a seal on the lower part of the perforation. This prevents the sealing plate from sliding under external force, which could cause the end of the needle to be exposed again and create a safety hazard for others. At the same time, it also prevents the anti-puncture device from being reused, making it highly practical.

[0030] Further, it also includes an elastic locking ring, which is C-shaped, and a locking mechanism is provided between the two ends of the elastic locking ring;

[0031] The outer wall of the elastic locking ring is provided with a fixing groove;

[0032] The connecting arms are two in number and are symmetrically arranged along the needle body. The free ends of the two connecting arms extend downward to form extension arms. The inner wall of the extension arms is provided with fixing teeth.

[0033] When the elastic locking ring secures the infusion port injection seat, the outer diameter of the elastic locking ring is smaller than the inner diameter between the two extension arms.

[0034] When the elastic locking ring is in a free state, the outer diameter of the elastic locking ring is greater than or equal to the inner diameter between the two extension arms.

[0035] This structural design, through the C-shaped elastic locking ring, allows the inward compression of the elastic locking ring during needle insertion into the port-a-cath to replace the medical staff's fingers in contact with the patient's skin. This, combined with the locking mechanism, locks the elastic locking ring, providing continuous fixation to the subcutaneous port-a-cath. The medical staff can then further secure the elastic locking ring by pressing it towards the patient. In this way, the medical staff's fingers do not need to exert force towards the needle, thus reducing the risk of needle puncture during insertion due to finger slippage.

[0036] Meanwhile, by matching the cooperation between the fixed slot and the fixed teeth, the elasticity and outer diameter of the elastic locking ring are limited, so as to form a connection between the pressing plate and the elastic locking ring after the needle is inserted without affecting the insertion of the needle into the infusion port injection seat. This makes it more convenient to use, as the elastic locking ring, the pressing plate and the needle seat with the needle can be discarded together after the needle is removed.

[0037] The locking mechanism includes a locking arm and a locking seat, which are respectively disposed at both ends of the elastic locking ring;

[0038] The outer wall of the locking arm is evenly provided with several one-way slots, and the one-way slots are inclined from the inside to the outside towards one end of the elastic locking ring of the locking arm.

[0039] The locking seat has a through groove, the locking arm passes through the through groove, and the locking seat has an elastic locking piece fixed on the outside of the locking arm. The elastic locking piece has a one-way locking tooth that is engaged in a one-way slot.

[0040] This structural design, through the cooperation of the locking arm and the locking seat, and the cooperation of the one-way slot and the one-way tooth, forms a locking component with a one-way locking function. When closing the two ends of the elastic locking ring, there is no need to operate the locking mechanism. After closing, it automatically locks the elastic locking ring, making it more convenient to use.

[0041] Furthermore, the outer walls on both sides of the elastic locking ring are provided with sub-plates.

[0042] This structural design, through the setting of the sub-plates, allows the medical staff's non-needle hand to press on the two sub-plates to fix the elastic locking ring when the needle is inserted, thereby further increasing the distance between the medical staff's fingers and the needle, thus further reducing the risk of the medical staff's fingers being pricked by the needle. It is highly practical.

[0043] Further, the sub-plate is provided with a fan-shaped groove, and the fixing slot is located in the fan-shaped groove.

[0044] This structural design, with its fan-shaped groove, accommodates the fixing slot and avoids the extension arm. It allows for a larger arc length on the sub-plate, providing a wider range of pressing options for the hand not holding the needle, while also ensuring the fixing slot has a larger arc length, making it more convenient to use.

[0045] The invention employing the above technical solution has the following advantages:

[0046] 1. Through the cooperation of the connecting rod, needle seat, and pressing plate, the connecting rod limits the maximum upward movement of the needle seat relative to the pressing plate, thereby preventing the needle tip from detaching from the perforation. Then, the sealing mechanism is connected to the connecting rod to allow the lower end of the needle to detach from the infusion port injection seat and the patient's skin and enter the perforation, thus sealing the lower end of the perforation. This avoids the risk of medical staff being pricked when removing the needle and fixing the infusion port injection seat.

[0047] 2. Through the cooperation of the connecting rod, receiving groove, sliding column and sliding groove, the sliding connection between the connecting arm and the connecting rod is completed. The sliding distance of the sliding column is limited by the receiving groove with limited length, thereby achieving the purpose of limiting the maximum upward movement distance of the needle seat relative to the pressing plate. The structure is simple, easy to use and highly practical.

[0048] 3. By setting the base, the overall height of the pressing plate can be increased, thereby increasing the length of the perforation. When the needle seat moves upward relative to the pressing plate to the maximum position, the free end of the needle is located inside the perforation. The sealing mechanism forms a sealing state at the lower end of the perforation, which has a greater fault tolerance. In this way, while meeting the usage requirements, the overall precision requirements of the anti-puncture device are reduced, making it more practical.

[0049] 4. The sealing mechanism is formed by the sealing plate that is slidably installed in the transverse groove and the stop block located on the movement path of the lower end of the connecting rod. During the needle removal process, the lower end of the connecting rod pushes the stop block, which drives the sealing plate to seal the lower part of the perforation. The structure is simple, easy to manufacture, and highly practical.

[0050] 5. By matching the elastic teeth and the locking notch, the sealing plate seals the lower part of the perforation, thus fixing the sealing mechanism and the pressing plate. This prevents the sealing plate from sliding under external force, which could cause the end of the needle to be exposed again and pose a safety hazard to others. At the same time, it also prevents the anti-puncture device from being reused, making it highly practical.

[0051] 6. With the C-shaped elastic locking ring, when inserting the needle into the port-a-cath, the elastic locking ring can be squeezed inward to replace the medical staff's fingers and make contact with the patient's skin. The locking mechanism locks the elastic locking ring, forming a continuous fixation on the subcutaneous port-a-cath. The medical staff can then press the elastic locking ring towards the patient to fix it in place. At this time, the medical staff's fingers do not need to exert force towards the needle body, thereby reducing the risk of needle puncture caused by finger slippage during needle insertion.

[0052] Meanwhile, by matching the cooperation between the fixed slot and the fixed tooth, the elasticity and outer diameter of the elastic locking ring are limited, so as to form a connection between the pressing plate and the elastic locking ring after the needle is inserted without affecting the insertion of the needle into the infusion port injection seat. This makes it more convenient to use, as the elastic locking ring, the pressing plate and the needle seat with the needle can be discarded together after the needle is removed.

[0053] 7. By cooperating with the locking arm and locking seat, and utilizing the cooperation of the one-way slot and one-way tooth, a locking component with one-way locking function is formed. When closing the two ends of the elastic locking ring, there is no need to operate the locking mechanism. After closing in place, it automatically locks the elastic locking ring, making it more convenient to use. Attached Figure Description

[0054] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0055] Figure 1 This is a schematic diagram of an embodiment of the anti-puncture device for infusion ports according to the present invention;

[0056] Figure 2 for Figure 1 Enlarged structural diagram at point A;

[0057] Figure 3 This is a cross-sectional structural schematic diagram of an embodiment of an anti-puncture device for infusion ports according to the present invention;

[0058] Figure 4 for Figure 3 Enlarged structural diagram at point B;

[0059] Figure 5 This is a schematic diagram of the sealing mechanism in an embodiment of an anti-puncture device for infusion ports according to the present invention;

[0060] Figure 6 This is a schematic diagram of the structure of the needle body before puncture in an embodiment of the anti-puncture device for infusion ports according to the present invention;

[0061] Figure 7 This is a cross-sectional view of the elastic locking ring portion in an embodiment of an anti-puncture device for an infusion port according to the present invention.

[0062] Figure 8 for Figure 7 Enlarged structural diagram at point C;

[0063] Figure 9 This is a cross-sectional view of the anti-puncture device for infusion ports of the present invention before needle removal.

[0064] Figure 10 for Figure 9 Enlarged structural diagram at point D;

[0065] Figure 11 This is a cross-sectional view of an embodiment of the anti-puncture device for infusion ports of the present invention after needle removal.

[0066] Figure 12 for Figure 11 Enlarged structural diagram at point E;

[0067] The symbols for the main components are explained below:

[0068] Needle base 1, needle body 10, wing plate 11, hinge base 12

[0069] Pressing plate 2, plate body 20, base 21, perforation 210

[0070] Connecting arm 22, receiving groove 221, sliding groove 222, extension arm 223, fixing tooth 2230,

[0071] Connecting rod 23, hinged column 231, sliding column 232

[0072] 3. Blocking mechanism; 30. Horizontal groove; 31. Blocking plate; 32. Elastic locking teeth; 320. Clearance groove; 33. Stop block.

[0073] 4. Elastic locking ring, 40. Fixed slot, 401. Pulley, 402. Pressure ring, 403. Sub-plate, 404. Clearance hole, 405. Sector groove.

[0074] Locking arm 41, one-way slot 410

[0075] Locking seat 42, elastic locking plate 421, one-way locking tooth 422. Detailed Implementation

[0076] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that similar or identical parts are referred to by the same reference numerals in the drawings or description. Implementations not shown or described in the drawings are forms known to those skilled in the art. In addition, directional terms mentioned in the embodiments, such as "up," "down," "top," "bottom," "left," "right," "front," and "back," are only for reference to the directions in the drawings and are not intended to limit the scope of protection of the present invention.

[0077] like Figures 1-12 As shown, an anti-puncture device for infusion ports according to the present invention includes:

[0078] Needle holder 1, needle body 10 is fixedly mounted on needle holder 1, needle holder 1 and needle body 10 are perpendicular to each other, and needle holder 1 is provided with a gripping part;

[0079] Pressing plate 2, the pressing plate 2 has a through hole 210 that passes through the pressing plate 2, and the needle body 10 passes through the through hole 210;

[0080] The connecting rod 23 has one end rotatably mounted on the needle seat 1 and the other end slidably mounted on the pressing plate 2. When the needle seat 1 moves upward relative to the pressing plate 2 to the maximum position, the free end of the needle body 10 is located in the through hole 210.

[0081] The sealing mechanism 3 is movably mounted on the pressing plate 2. The sealing mechanism 3 is connected to the connecting rod 23 for transmission. It is used to seal the lower part of the perforation 210 below the needle body 10 after the lower end of the needle body 10 is separated from the infusion port injection seat and the patient's skin and enters the perforation 210.

[0082] When removing the needle, the medical staff presses the pressure plate 2 towards the infusion port injection seat with one hand, and pulls it upward with the other hand until the lower end of the needle body 10 is separated from the infusion port injection seat and the patient's skin and enters the perforation 210. At this time, the connecting rod 23 begins to drive the sealing mechanism 3 to move towards the perforation 210 until the needle seat 1 moves upward relative to the pressure plate 2 to the maximum position. The sealing mechanism 3 is then driven to the bottom of the needle body 10 to form a blockage of the lower part of the perforation 210.

[0083] The gripping part includes two flaps 11 hinged to the needle seat 1.

[0084] In practice, depending on the actual situation, a gripping part can be formed by a structure that can be detachably installed on the needle holder 1 to achieve the gripping function. In this embodiment, the gripping part is formed by two wings 11 hinged to the needle holder 1. When the needle holder 1 is inserted or removed, the wings 11 can be flipped to a vertical state to achieve the gripping function. When using an dressing to fix the needle holder 1 to the patient's skin, the wings 11 can be flipped to rest against the pressure plate 2, reducing the overall height of the anti-puncture device. The structure is simple, easy to use, and highly practical.

[0085] The pressing disc 2 includes a disc body 20 and a connecting arm 22 that are fixedly connected;

[0086] The connecting arm 22 is located above the disk body 20;

[0087] One end of the connecting rod 23 is slidably mounted on the connecting arm 22.

[0088] In practice, depending on the actual situation, the free end of the connecting rod 23 can also be directly slidably mounted on the disc body 20. In this embodiment, the sliding connection between the connecting rod 23 and the pressing disc 2 is achieved through the sliding connection between the connecting arm 22 and the connecting rod 23, which reduces the structural strength requirements of the disc body 20 and thus reduces the thickness of the disc body 20, making it more practical.

[0089] The upper end face of the connecting arm 22 is provided with a receiving groove 221, and the connecting rod 23 passes through the receiving groove 221;

[0090] The side wall of the connecting arm 22 is provided with a sliding groove 222, and the lower end of the connecting rod 23 is fixedly provided with a sliding column 232, which passes through the sliding groove 222.

[0091] In practice, depending on the actual situation, a sliding connection between the connecting rod 23 and the connecting arm 22 can be achieved by setting a U-shaped arm at the lower end of the connecting rod 23, placing the connecting arm 22 inside the U-shaped arm, and then setting a crossbar at the lower end of the U-shaped arm below the connecting arm 22. In this embodiment, the sliding connection between the connecting arm 22 and the connecting rod 23 is achieved through the cooperation of the connecting rod 23, the receiving groove 221, the sliding column 232 and the sliding groove 222. The receiving groove 221 with a limited length dimension restricts the sliding distance of the sliding column 232, thereby achieving the purpose of limiting the maximum upward movement distance of the needle seat 1 relative to the pressing plate 2. The structure is simple, easy to use and highly practical.

[0092] The sliding groove 222 slopes downwards from the inside out.

[0093] In practice, the sliding groove 222 can also be set to a horizontal state according to the actual situation. In this embodiment, the sliding groove 222 is tilted so that the end of the sliding groove 222 close to the needle body 10 is at the top of the horizontal height, which makes the sliding column 232 slide more smoothly in the sliding groove 222 when the needle seat 1 is pulled out, and has strong practicality.

[0094] A hinge post 231 is fixedly provided at the upper end of the connecting rod 23;

[0095] A hinge seat 12 is fixedly provided on the needle seat 1, and an opening with a width smaller than the diameter of the hinge post 231 is opened at the top of the hinge seat 12.

[0096] The hinge post 231 is hung inside the hinge seat 12 through an opening.

[0097] In practice, depending on the actual situation, a hinge rod can be fixedly installed on the needle seat 1, and a hook can be installed on the connecting rod 23. The hook is hung on the hinge rod to realize the hinge between the connecting rod 23 and the needle seat 1. In this embodiment, the hinge between the connecting rod 23 and the needle seat 1 is completed by rotating the hinge column 231 and the hinge seat 12. The structure is simple, the assembly is convenient, and the practicality is strong.

[0098] The press plate 2 also includes a base 21 fixedly mounted on the press plate 2.

[0099] The perforation 210 passes through both the pressing plate 2 and the base 21.

[0100] By setting the seat 21, the overall height of the pressing plate 2 can be increased, thereby increasing the length of the perforation 210. When the needle seat 1 moves upward relative to the pressing plate 2 to the maximum position, the free end of the needle body 10 is located inside the perforation 210, and the sealing mechanism 3 forms a sealing state on the lower end of the perforation 210, which has a greater fault tolerance rate. In this way, while meeting the usage requirements, the overall precision requirements of the anti-puncture device are reduced, making it more practical.

[0101] The connecting arm 22 is fixedly connected to the disc body 20 via the base 21.

[0102] A transverse groove 30 is provided on the seat body 21;

[0103] The sealing mechanism 3 includes a sealing plate 31, which is laterally slidably installed in the transverse groove 30;

[0104] The sealing plate 31 is provided with a stop block 33;

[0105] The stop block 33 is located on the movement path of the lower end of the connecting rod 23.

[0106] In practice, depending on the actual situation, a combination of spring, sealing plate 31, and locking element can be selected. The locking element fixes the sealing plate 31, and the movement of the connecting rod 23 unlocks the locking element. The spring then pushes the sealing plate 31 to seal the perforation 210. In this embodiment, the sealing mechanism 3 is formed by the sealing plate 31, which is slidably installed in the transverse groove 30, and the stop block 33 located on the lower end of the connecting rod 23. During the needle removal process, the lower end of the connecting rod 23 pushes the stop block 33, which drives the sealing plate 31 to seal the lower part of the perforation 210. The structure is simple, easy to manufacture, and highly practical.

[0107] The sealing plate 31 is provided with elastic teeth 32 and clearance grooves 320 for accommodating the elastic teeth 32;

[0108] The seat 21 has a locking notch at the top of the transverse groove 30 that matches the elastic locking tooth 32;

[0109] The elastic locking teeth 32 are inclined downward along the direction of movement of the sealing plate 31.

[0110] By matching the elastic locking teeth 32 with the locking notch, the sealing plate 31 forms a seal on the lower part of the perforation 210, thus completing the fixation between the sealing mechanism 3 and the pressing plate 2. This prevents the sealing plate 31 from sliding under external force, which would cause the end of the needle body 10 to be exposed again, thus posing a safety hazard to others. At the same time, it also prevents the anti-puncture device from being reused, making it highly practical.

[0111] There are two elastic locking teeth 32, and the two elastic locking teeth 32 are arranged linearly along the movement direction of the sealing plate 31;

[0112] Before the connecting rod 23 contacts the stop block 33, the elastic locking teeth 32 away from the stop block 33 are engaged in the locking notch;

[0113] After the sealing plate 31 blocks the lower part of the through hole 210, the elastic locking tooth 32 near the stop block 33 is engaged in the locking notch.

[0114] In practice, depending on the actual situation, only one elastic locking tooth 32 can be set to fix the sealing mechanism 3 and the pressing plate 2 after the sealing mechanism has sealed the perforation 210. In this embodiment, two elastic locking teeth 32 are used to fix the sealing mechanism 3 and the pressing plate 2 before and after the sealing mechanism has sealed the perforation 210. The structure is simple, easy to use, and highly practical.

[0115] It also includes an elastic locking ring 4, which is C-shaped and has a locking mechanism between its two ends;

[0116] The outer wall of the elastic locking ring 4 is provided with a fixing groove 40;

[0117] There are two connecting arms 22, which are symmetrically arranged along the needle body 10. The free ends of the two connecting arms 22 extend downward to form extension arms 223. The inner wall of the extension arm 223 is provided with fixing teeth 2230.

[0118] When the elastic locking ring 4 forms a fixation on the infusion port injection seat, the outer diameter of the elastic locking ring 4 is smaller than the inner diameter between the two extension arms 223.

[0119] When the elastic locking ring 4 is in a free state, the outer diameter of the elastic locking ring 4 is greater than or equal to the inner diameter between the two extension arms 223.

[0120] With the C-shaped elastic locking ring 4, when inserting a needle into the port-a-cath, the elastic locking ring 4 can be squeezed inward to replace the medical staff's fingers and contact the patient's skin. The locking mechanism locks the elastic locking ring 4, thus continuously fixing the port-a-cath located under the patient's skin. The medical staff can then press the elastic locking ring 4 towards the patient to fix it. At this time, the medical staff's fingers do not need to exert force towards the needle body 10, thereby reducing the risk of being pricked by the needle body 10 during needle insertion due to finger slippage.

[0121] Meanwhile, through the mutual cooperation of the fixed slot 40 and the fixed tooth 2230, the elasticity and outer diameter of the elastic locking ring 4 are matched and limited, so that the connection between the pressing plate 2 and the elastic locking ring 4 is formed after the needle insertion is completed without affecting the insertion of the needle body 10 into the infusion port injection seat. This makes it more convenient to use, as the elastic locking ring 4, the pressing plate 2 and the needle seat 1 with the needle body 10 can be discarded together after the needle is removed.

[0122] The locking mechanism includes a locking arm 41 and a locking seat 42, which are respectively disposed at both ends of the elastic locking ring 4;

[0123] The outer wall of the locking arm 41 is evenly provided with several one-way slots 410, and one end of the one-way slot 410 is inclined from the inside to the outside of the elastic locking ring 4 of the locking arm 41.

[0124] The locking seat 42 has a through groove, the locking arm 41 passes through the through groove, and the locking seat 42 has an elastic locking piece 421 fixed on the outside of the locking arm 41. The elastic locking piece 421 has a one-way locking tooth 422 that is engaged in the one-way locking groove 410.

[0125] In practice, depending on the actual situation, bolts such as those used to connect the two ends of the elastic locking ring 4 can be selected. The rotation of the bolts can lock the two ends of the elastic locking ring 4. In this embodiment, the locking arm 41 and the locking seat 42 cooperate with each other, and the one-way slot 410 and the one-way tooth 422 cooperate with each other to form a locking component with one-way locking function. When closing the two ends of the elastic locking ring 4, there is no need to operate the locking mechanism. After closing, the elastic locking ring 4 is automatically locked, which is more convenient to use.

[0126] The free end of the elastic locking piece 421 protrudes outward from the locking seat 42.

[0127] In practice, depending on the actual situation, a pull ring can be set at the free end of the elastic locking piece 421 to operate the elastic locking piece 421. In this embodiment, the free end of the elastic locking piece 421 protrudes outward, so that after the needle body 10 is punctured, the elastic locking piece 421 can be moved by the free end of the elastic locking piece 421 protruding outward from the locking seat 42, thereby causing the one-way locking tooth 422 to disengage from the one-way locking groove 410, thus completing the unlocking, which is highly practical.

[0128] Both ends of the elastic locking ring 4 are provided with a dial ring 401.

[0129] With the setting of the dial ring 401, when the two ends of the elastic locking ring 4 are squeezed together, two fingers can be inserted into the two dial rings 401 respectively, and the dial ring 401 provides a force point for medical staff, making it more convenient to use.

[0130] A pressure ring 402 is provided on the outer wall of the middle part of the elastic locking ring 4.

[0131] By setting the pressure ring 402 and cooperating with the two lever rings 401, when the elastic locking ring 4 is locked and the needle body 10 is being punctured, the medical staff's non-needle hand can press the two lever rings 401 with the index and middle fingers and press the pressure ring 402 with the thumb to fix the elastic locking ring 4. This further increases the distance between the medical staff's fingers and the needle body 10, thereby further reducing the risk of the medical staff's fingers being pricked by the needle body 10. It is highly practical.

[0132] The outer walls on both sides of the elastic locking ring 4 are provided with sub-plates 403.

[0133] With the sub-plate 403 in place, when the elastic locking ring 4 is locked and the needle body 10 is being punctured, the medical staff's hand that is not holding the needle can be pressed on the two sub-plates 403 to fix the elastic locking ring 4. This further increases the distance between the medical staff's fingers and the needle body 10, thereby further reducing the risk of the medical staff's fingers being pricked by the needle body 10. It is highly practical.

[0134] The sub-plate 403 is provided with a clearance hole 404 for avoiding the locking arm 41.

[0135] In practice, the arc length of the sub-plate 403 can be shortened according to the actual situation to avoid the sub-plate 403 interfering with the movement of the locking arm 41. In this embodiment, the locking arm 41 is avoided by the avoidance hole 404. When the arc length of the sub-plate 403 is large and the hand not holding the needle has a larger pressing range, the sub-plate 403 can avoid interfering with the movement of the locking arm 41, which is highly practical.

[0136] The sub-plate 403 has a fan-shaped groove 405, and the fixing slot 40 is located in the fan-shaped groove 405.

[0137] In practice, depending on the actual situation, the fixing slot 40 can be set outside the setting range of the sub-plate 403. In this embodiment, the fixing slot 40 is accommodated by the setting of the fan-shaped slot 405, and the extension arm 223 is avoided. When the arc length of the sub-plate 403 is large and the hand not holding the needle has a larger pressing range, the fixing slot 40 also has a large arc length, making it more convenient to use.

[0138] In this embodiment, before puncture, the elastic locking ring 4 is fitted onto the outer wall of the infusion port injection seat, and the lower end face of the elastic locking ring 4 is pressed tightly against the patient's skin. Then, two fingers are inserted into the two dials 401 respectively, and the dials 401 provide the force points for the medical staff, causing the two ends of the elastic locking ring 4 to be squeezed together. At the same time, the other hand simultaneously squeezes the middle of both sides of the elastic locking ring 4 towards the center until the inner wall of the elastic locking ring 4 and the outer wall of the infusion port injection seat form a pressure on the patient's skin.

[0139] During this process, the elastic locking ring 4 undergoes elastic deformation under external force, the locking arm 41 slides in the through groove of the locking seat 42, and pushes the elastic locking piece 421 to deform away from the locking arm 41, thereby causing the one-way locking tooth 422 to disengage from the one-way locking groove 410 until the extrusion ends. At this time, the one-way locking tooth 422 is locked in the new one-way locking groove 410, forming a lock on the elastic locking ring 4.

[0140] Then, the medical staff, without holding the needle, press their index and middle fingers on the two dial rings 401 and their thumb on the pressure ring 402; or press on the two auxiliary plates 403 to fix the elastic locking ring 4.

[0141] Then, medical staff hold the two flaps 11 that have been flipped to the vertical position, and with the extension arm 223 aligned with the angle of the fan-shaped groove 405, insert the needle body 10 into the infusion port injection seat through the patient's skin.

[0142] After the puncture, the free end of the elastic locking piece 421 is moved, causing it to deform elastically. This causes the one-way locking tooth 422 to disengage from the one-way locking groove 410. At this time, the elastic locking ring 4 automatically expands outward under its own elasticity, releasing the pressure on the infusion port injection seat under the patient's skin. Simultaneously, the fixing groove 40 of the elastic locking ring 4 engages with the fixing teeth 2230 of the two extension arms 223, forming a connection between the pressure plate 2 and the elastic locking ring 4 (e.g., Figure 9 and Figure 10 (as shown)

[0143] Finally, flip the wing 11 so that it rests against the pressure plate 2, and then use the dressing to fix the needle body 10 together with the elastic locking ring 4 that automatically expands outward to the patient's skin.

[0144] When removing the needle, the medical staff presses the two lever rings 401 with the index and middle fingers of one hand and presses the pressure ring 402 with the thumb; or presses the two auxiliary plates 403 to fix the elastic locking ring 4. The connection between the pressure plate 2 and the elastic locking ring 4 is used to fix the pressure plate 2.

[0145] With the other hand, grasp the two flaps 11 that have been flipped to a vertical position again, and then pull the needle seat 1 upward. During this process, the sliding column 232 of the connecting rod 23 slides within the sliding groove 222 of the connecting arm 22 until the lower end of the needle body 10 disengages from the infusion port injection seat and the patient's skin and enters the perforation 210. At this point, the lower end of the connecting rod 23 contacts the stop block 33 of the sealing mechanism 3 (e.g., Figures 1-4 (as shown)

[0146] Continue pulling the needle holder 1 upwards. The lower end of the connecting rod 23 moves closer to the seat body 21, squeezing the stop block 33 and overcoming the prestress of the elastic locking teeth 32 located in the locking notch. This causes the stop block 33 to move laterally towards the through hole 210 until the needle holder 1 moves upwards relative to the pressing plate 2 to its maximum position, i.e., the sliding column 232 slides to the top of the sliding groove 222. At this time, the elastic locking teeth 32 on the right side are located in the locking notch, and the free end of the needle body 10 is still located in the through hole 210. The sealing plate 31 is driven to the bottom of the needle body 10, forming a seal on the lower part of the through hole 210 (e.g., Figure 11 and Figure 12 (As shown).

[0147] The foregoing has provided a detailed description of the anti-puncture device for infusion ports provided by the present invention. The specific embodiments described are merely for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A puncture prevention device for infusion ports, characterized in that: include: A needle holder (1) is provided with a needle body (10) fixed on it. The needle holder (1) and the needle body (10) are perpendicular to each other. A gripping part is provided on the needle holder (1). The pressing plate (2) has a through hole (210) that passes through it, and the needle body (10) passes through the through hole (210). Connecting rod (23), one end of which is rotatably mounted on needle seat (1) and the other end is slidably mounted on pressing plate (2). When the needle seat (1) moves upward relative to the pressing plate (2) to the maximum position, the free end of the needle body (10) is located in the through hole (210). The sealing mechanism (3) is movably mounted on the pressing plate (2). The sealing mechanism (3) is connected to the connecting rod (23) for transmission. After the lower end of the needle body (10) is separated from the infusion port injection seat and the patient's skin and enters the perforation (210), the lower part of the perforation (210) is sealed below the needle body (10). The pressing disc (2) includes a disc body (20) and a connecting arm (22) that are fixedly connected. The connecting arm (22) is located above the disk body (20); One end of the connecting rod (23) is slidably mounted on the connecting arm (22); It also includes an elastic locking ring (4), which is C-shaped and has a locking mechanism between its two ends; The outer wall of the elastic locking ring (4) is provided with a fixing groove (40); The connecting arms (22) are two in number and are symmetrically arranged along the needle body (10). The free ends of the two connecting arms (22) extend downward to form extension arms (223). The inner wall of the extension arm (223) is provided with fixing teeth (2230) that match the fixing slot (40). When the elastic locking ring (4) is squeezed inward to fix the infusion port injection seat through the skin, the outer diameter of the elastic locking ring (4) is smaller than the inner diameter between the two extension arms (223). When the elastic locking ring (4) is in a free state, the outer diameter of the elastic locking ring (4) is greater than or equal to the inner diameter between the two extension arms (223).

2. The anti-puncture device for infusion ports according to claim 1, characterized in that: The upper end face of the connecting arm (22) is provided with a receiving groove (221), and the connecting rod (23) passes through the receiving groove (221); The side wall of the connecting arm (22) is provided with a sliding groove (222), and the lower end of the connecting rod (23) is fixedly provided with a sliding column (232), which passes through the sliding groove (222).

3. The anti-puncture device for infusion ports according to claim 1, characterized in that: The pressing plate (2) also includes a base (21) fixedly mounted on the pressing plate (2). The perforation (210) extends through both the pressing plate (2) and the seat (21).

4. The anti-puncture device for infusion ports according to claim 3, characterized in that: A transverse groove (30) is provided on the seat (21); The sealing mechanism (3) includes a sealing plate (31), which is laterally slidably installed in the transverse groove (30); The sealing plate (31) is provided with a stop (33); The stop (33) is located on the movement path of the lower end of the connecting rod (23).

5. The anti-puncture device for infusion ports according to claim 4, characterized in that: The sealing plate (31) is provided with elastic teeth (32) and clearance grooves (320) for accommodating the elastic teeth (32). The seat (21) has a locking notch at the top of the transverse groove (30) that matches the elastic locking tooth (32); The elastic locking teeth (32) are inclined downward along the direction of movement of the sealing plate (31).

6. The anti-puncture device for infusion ports according to claim 1, characterized in that: The locking mechanism includes a locking arm (41) and a locking seat (42), which are respectively disposed at both ends of the elastic locking ring (4); The outer wall of the locking arm (41) is evenly provided with a number of one-way slots (410), and the one-way slots (410) are inclined from the inside to the outside towards one end of the elastic locking ring (4) of the locking arm (41). The locking seat (42) has a through groove, the locking arm (41) passes through the through groove, and the locking seat (42) has an elastic locking piece (421) fixed on the outside of the locking arm (41). The elastic locking piece (421) has a one-way locking tooth (422) that is engaged in the one-way slot (410).

7. The anti-puncture device for infusion ports according to claim 1, characterized in that: The elastic locking ring (4) has a secondary plate (403) on both outer walls. The sub-plate (403) has a fan-shaped groove (405), and the fixing slot (40) is located in the fan-shaped groove (405).

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