Modularized lancing pen with replaceable needle head

Abstract

The invention discloses a modularized blood lancing pen with a replaceable needle head, and belongs to the field of blood lancing pens. Comprising a pressing module, and a puncturing module is arranged on the left side of the pressing module; the pressing module comprises a barrel, a lifting piece is slidably connected to the interior of the barrel, a push rod is fixedly connected to the interior of the lifting piece, and a first spring is fixedly connected to the position, located on the outer side of the push rod, between the lower surface of the lifting piece and the lower surface of the interior of the barrel. According to the lancet, the structural design is optimized, the blood sampling operation process is greatly simplified, the two hands of a collection person do not need to support the limbs of a patient and an operation device respectively, the position of the L-shaped finger support can be adjusted through rotation, the L-shaped finger support is rotated to the position below the push rod during use, and the arc-shaped support opening can stably support the fingers of the patient; collecting personnel can complete the whole process of puncturing and blood sampling by pressing the push rod with a single hand, additional hand assistance is not needed, the operation difficulty is effectively reduced, the blood sampling efficiency is improved, and the device is particularly suitable for a single-person operation scene.

Description

Technical Field

[0001] This invention relates to the field of lancets, and more particularly to a modular lancet with replaceable needles. Background Technology

[0002] A blood sampling pen is a tool used in medical and laboratory settings, primarily for collecting blood samples from veins or fingertips; Patent CN216394133U relates to an adjustable-depth blood-prick pen for piercing the human body to collect blood. It includes: an internally arranged annular guide block, with a first annular protrusion on its outward-facing end face; a first baffle plate disposed on the inner wall of the cylinder; a second baffle plate disposed on the inner wall of the cylinder between the first baffle plate and a conical surface; an inner rod, cylindrical in shape, slidably disposed inside the cylinder, inside the first and second baffle plates; a button, one end of which is circular, and the other end is hollow cylindrical; the circular end of the button is located inside the cylinder, and the hollow cylindrical end is slidably disposed within a circular opening at the upper end of the cylinder and connected to the top of the inner rod; a spring disposed between the button and the first baffle plate; a connecting block with a needle attached to its bottom; and a bottom extension block connected to the bottom of the cylinder. This device allows for adjustment of the needle piercing length. When using the above-mentioned techniques, the operator needs to hold the patient's finger with one hand and operate the device with the other hand to collect the blood. This is inconvenient. Furthermore, the above techniques cannot limit the pressure point, which can easily lead to accidental needle protrusion. In addition, the above techniques only have a single needle, which makes it difficult to flexibly adjust and replace the puncture needle when collecting blood from multiple patients. Therefore, we propose a modular lancet pen with a replaceable needle. Summary of the Invention

[0003] Purpose of the Invention: The purpose of this invention is to provide a modular lancet with replaceable needles, optimizing the convenience of blood collection operations. It eliminates the need for the collector to hold the patient's limb and the operating device separately with both hands, allowing the blood collection process to be completed with just one hand, reducing operational difficulty and improving efficiency. Another purpose of this invention is to provide a modular lancet with a press-limiting structure. By adding an anti-accidental contact limiting mechanism, it prevents accidental needle extension during non-operational states, ensuring safety. Furthermore, another purpose of this invention is to achieve rapid modular needle replacement. By flexibly changing needles for multiple patient collection scenarios, it simplifies the operation process, improves hygiene and versatility, and solves problems such as inconvenient operation, easy accidental contact, and difficulty in needle replacement in existing technologies.

[0004] Technical solution: A modular lancet with replaceable needles, including a pressing module, wherein a puncture module is provided on the left side of the pressing module; The pressing module includes a cylinder, a lifting plate is slidably connected inside the cylinder, a push rod is fixedly connected inside the lifting plate, and a spring is fixedly connected between the lower surface of the lifting plate and the lower inner surface of the cylinder, and outside the push rod. The right side of the cylinder is rotatably connected to a shaft, and an L-shaped finger support is fixedly connected to the right end of the shaft. The puncture module includes a fixing block, the right side of which is fixedly connected to the right side of the cylinder, a vertical rod is fixedly connected to the lower surface of the fixing block, and a disc is rotatably connected to the bottom end of the vertical rod via a rotating shaft. The upper surface of the disc has multiple through-holes for dispensing. A storage tube is engaged inside the delivery hole. A pressure plate is slidably connected inside the storage tube. A puncture needle is fixedly connected to the bottom of the pressure plate. A spring is fixedly connected between the pressure plate and the storage tube, and outside the puncture needle.

[0005] Furthermore, a trapezoidal pressure strip is provided on the right side of the cylinder, and two springs are fixedly connected to the trapezoidal pressure strip and the opposite side of the cylinder. A stop block is fixedly connected to the left side of the trapezoidal pressure strip, and the left end of the stop block passes through the right side of the cylinder and is slidably connected to the cylinder. The trapezoidal pressure strip is adapted to the L-shaped finger support.

[0006] Furthermore, a rubber pressure block is fixedly connected to the top of the push rod.

[0007] Furthermore, a gear is fixedly connected to the left end of the shaft inside the cylinder, and a guide block is fixedly connected to the right side of the cylinder below the gear. A toothed block is slidably installed on the outside of the guide block, and the toothed block meshes with the gear. A spring is fixedly connected between the toothed block and the guide block.

[0008] Furthermore, the inner lower surface of the L-shaped finger support is integrally formed with an arc-shaped support opening.

[0009] Furthermore, the outer wall of the disc is provided with a plurality of limiting holes, the number of which is the same as the number of delivery holes, and their positions correspond one-to-one.

[0010] Furthermore, a cover plate is slidably connected to the outer wall of the vertical rod and above the plurality of storage cylinders, and a spring five is fixedly connected to the cover plate and the opposite side of the fixing block and located on the outer side of the vertical rod.

[0011] Furthermore, a through hole is provided on the upper surface of the cover plate and at the bottom end of the push rod.

[0012] Furthermore, an L-shaped bracket is fixedly connected to the left side of the cover plate, and a positioning post is slidably connected to the inner side of the L-shaped bracket. A spring is fixedly connected between the positioning post and the L-shaped bracket. The right end of the positioning post is inserted into the limiting hole located on the left side of the outer wall of the disc.

[0013] Beneficial effects: This lancet, through its optimized structural design, greatly simplifies the blood collection process. It eliminates the need for the collector to hold the patient's limb and the operating device with both hands. The L-shaped finger support can be rotated to adjust its position. When in use, it is rotated to the underside of the push rod, and the arc-shaped support provides stable support for the patient's finger. The collector can complete the entire process of pressing the push rod to perform puncture and blood collection with just one hand, without the need for additional hand assistance. This effectively reduces the difficulty of operation and improves blood collection efficiency, making it especially suitable for single-person operation scenarios. The rubber pressure block in the pressing module increases the contact friction, making the pressing process more comfortable and effortless, further optimizing the user experience; The device is equipped with a sophisticated press-limiting mechanism, which effectively prevents the needle from accidentally extending due to accidental contact when not in use, significantly improving safety. When not in use, the L-shaped finger support presses against the trapezoidal pressure strip, causing the stop block to abut against the lower part of the lifting plate, thus creating a stable limit on the lifting plate. Even if the rubber pressure block is accidentally touched, the push rod cannot be pushed down, eliminating the risk of accidental triggering from the source. At the same time, the gear and tooth block on the left end of the shaft mesh with each other, which can limit the L-shaped finger support from rotating freely, ensuring the stability of the limit state and preventing limit failure due to accidental rotation, providing double protection for medical operation safety. The multi-station puncture module design enables rapid and flexible needle replacement, adapting to the needs of continuous blood collection from multiple patients. Multiple insertion holes are provided on the disc, each pre-loaded with a storage tube containing the puncture needle. Different storage tubes can be switched by rotating the disc. Combined with precise positioning of the positioning post and limiting hole, needle switching can be completed quickly without cumbersome disassembly steps. Furthermore, the old storage tube can be removed and replaced by pulling up the cover. The modular design not only simplifies the needle replacement process but also avoids needle contamination during replacement, improving operational convenience while ensuring hygiene and safety. Attached Figure Description

[0014] Figure 1 This is a front view structural diagram of the present invention; Figure 2 This is a schematic diagram of the internal structure of the pressing module of the present invention; Figure 3 This is a schematic diagram of the L-shaped finger support of the present invention; Figure 4 This is a side view schematic diagram of the connection structure between the tooth block and the guide block of the present invention; Figure 5This is a side view schematic diagram of the connection structure between the stop block and the trapezoidal pressure strip of the present invention; Figure 6 This is a schematic diagram of the puncture module of the present invention; Figure 7 This is a top view of the disk structure of the present invention; Figure 8 This is a schematic diagram of the cover plate of the present invention; Figure 9 This is a schematic diagram of the internal structure of the storage tube of the present invention.

[0015] In the diagram: 1. Pressing module; 2. Puncture module; 101. Cylinder; 102. Lifting plate; 103. Push rod; 104. Spring 1; 105. Shaft column; 106. L-shaped finger support; 107. Trapezoidal pressure strip; 108. Spring 3; 109. Stop block; 110. Rubber pressure block; 111. Gear; 112. Guide block; 113. Tooth block; 114. Spring 4; 115. Arc-shaped support opening; 201. Fixing block; 202. Vertical rod; 203. Disc; 204. Dispensing hole; 205. Storage cylinder; 206. Pressure plate; 207. Puncture needle; 208. Spring 2; 209. Limiting hole; 210. Cover plate; 211. Spring 5; 212. Through hole; 213. L-shaped bracket; 214. Positioning post; 215. Spring 6. Detailed Implementation

[0016] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Example like Figures 1-5 As shown, a modular lancet with replaceable needles is provided, including a press module 1; The pressing module 1 includes a cylinder 101, a lifting plate 102 is slidably connected inside the cylinder 101, a push rod 103 is fixedly connected inside the lifting plate 102, and a spring 104 is fixedly connected between the lower surface of the lifting plate 102 and the lower surface of the cylinder 101, and outside the push rod 103. A shaft column 105 is rotatably connected to the right side of the cylinder 101 via a rotating shaft, and an L-shaped finger support 106 is fixedly connected to the right end of the shaft column 105. A trapezoidal pressure strip 107 is provided on the right side of the cylinder 101. Two springs 108 are fixedly connected to the trapezoidal pressure strip 107 and the opposite side of the cylinder 101. A stop block 109 is fixedly connected to the left side of the trapezoidal pressure strip 107. The left end of the stop block 109 passes through the right side of the cylinder 101 and is slidably connected to the cylinder 101. The trapezoidal pressure strip 107 is adapted to the L-shaped finger support 106. A rubber pressure block 110 is fixedly connected to the top of the push rod 103; A gear 111 is fixedly connected to the left end of the shaft 105 inside the cylinder 101. A guide block 112 is fixedly connected to the right side of the cylinder 101 and below the gear 111. A toothed block 113 is slidably installed on the outside of the guide block 112. The toothed block 113 meshes with the gear 111. A spring 114 is fixedly connected between the toothed block 113 and the guide block 112. The inner lower surface of the L-shaped finger support 106 is integrally formed with an arc-shaped support opening 115; Under normal conditions, the L-shaped finger support 106 rotates to the right side of the cylinder 101. At this time, the inner side of the L-shaped finger support 106 will press the trapezoidal pressure strip 107 to bring the stop block 109 to the bottom of the cylinder 101, and make the stop block 109 below the lifting plate 102, which will limit the lifting plate 102. At this time, the finger pressing against the rubber pressure block 110 cannot drive the push rod 103 to press down, thereby effectively avoiding touching the subsequent puncture module 2 and preventing the needle from protruding. Among them, the gear 111 at the left end of the shaft 105 meshes with the tooth block 113 to achieve a limiting effect, preventing the L-shaped finger support 106 from rotating arbitrarily. During the rotation of the L-shaped finger support 106, the tooth block 113 will move up and down repeatedly by squeezing the spring 114, so as not to affect the manual adjustment of the L-shaped finger support 106. When puncture is required, rotate the L-shaped finger support 106 so that the arc-shaped support opening 115 rotates to the position below the push rod 103. At this time, the L-shaped finger support 106 will disengage from the trapezoidal pressure bar 107, and under the push of the spring 108, the stop block 109 will disengage from below the lifting plate 102. At this time, the push rod 103 can be pressed down by pressing against the rubber pressure block 110, thereby driving the needle in the puncture module 2 to extend for puncture and achieve the effect of puncture and blood collection.

[0018] like Figures 6-9 As shown, a puncture module 2 is provided on the left side of the pressing module 1; The puncture module 2 includes a fixing block 201. The right side of the fixing block 201 is fixedly connected to the right side of the cylinder 101. A vertical rod 202 is fixedly connected to the lower surface of the fixing block 201. A disc 203 is rotatably connected to the bottom end of the vertical rod 202 via a rotating shaft. Multiple through-holes 204 are provided on the upper surface of the disc 203. A storage cylinder 205 is engaged inside the storage hole 204. A pressure plate 206 is slidably connected inside the storage cylinder 205. A puncture needle 207 is fixedly connected to the bottom of the pressure plate 206. A spring 208 is fixedly connected between the pressure plate 206 and the storage cylinder 205 and outside the puncture needle 207. The outer wall of the disc 203 is provided with a plurality of limiting holes 209. The number of limiting holes 209 is the same as the number of delivery holes 204, and their positions correspond one to one. A cover plate 210 is slidably connected to the outer wall of the vertical rod 202 and above the multiple storage cylinders 205. The cover plate 210 and the fixing block 201 are fixedly connected together to a spring 211 on the opposite side of the vertical rod 202. A through hole 212 is provided on the upper surface of the cover plate 210 and at the bottom end of the push rod 103; An L-shaped bracket 213 is fixedly connected to the left side of the cover plate 210. A positioning post 214 is slidably connected to the inner side of the L-shaped bracket 213. A spring 215 is fixedly connected between the positioning post 214 and the L-shaped bracket 213. The right end of the positioning post 214 is inserted into the interior of the limiting hole 209 located on the left side of the outer wall of the disc 203. When the push rod 103 in the pressing module 1 moves downward, the bottom end of the push rod 103 passes through the through hole 212 on the cover plate 210 and presses the pressure plate 206 in the storage cylinder 205. The pressure plate 206 slides downward and compresses the second spring 208, while driving the puncture needle 207 to extend from the bottom of the storage cylinder 205 to puncture and collect blood from the patient's finger. After blood collection is completed, the push rod 103 resets, the spring 208 recovers its deformation and pushes the pressure plate 206 and the puncture needle 207 to reset, and the puncture needle 207 is retracted into the storage tube 205; When the puncture needle 207 needs to be replaced, pull the positioning post 214 to the left to move the positioning post 214 out of the limiting hole 209, compress the spring six 215, release the limiting of the disc 203, and then rotate the disc 203 to rotate the storage tube 205 containing the new puncture needle 207 to the corresponding delivery hole 204 directly below the through hole 212. At this time, release the positioning post 214, and the spring six 215 will restore its deformation and push the positioning post 214 to the right, re-inserting it into the corresponding limiting hole 209 to complete the fixing of the disc 203, and the next blood collection operation can be performed. If the storage tube 205 needs to be replaced, the cover plate 210 can be pulled upwards, causing the cover plate 210 to slide upwards along the vertical rod 202 and compress the spring 211. The cover plate 210 will no longer limit the storage tube 205. Then, the old storage tube 205 can be taken out from the delivery hole 204. After replacing the new storage tube 205, the cover plate 210 can be released. The spring 211 will restore its deformation and push the cover plate 210 downwards to limit and fix the storage tube 205.

[0019] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A modular lancing device with replaceable needle comprising a pressing module (1), characterized in that: A puncture module (2) is provided on the left side of the pressing module (1); The pressing module (1) includes a cylinder (101), a lifting plate (102) is slidably connected inside the cylinder (101), a push rod (103) is fixedly connected inside the lifting plate (102), and a spring (104) is fixedly connected between the lower surface of the lifting plate (102) and the lower surface of the cylinder (101) and outside the push rod (103). The right side of the cylinder (101) is rotatably connected to a shaft (105), and an L-shaped finger support (106) is fixedly connected to the right end of the shaft (105). The puncture module (2) includes a fixing block (201), the right side of the fixing block (201) is fixedly connected to the right side of the cylinder (101), a vertical rod (202) is fixedly connected to the lower surface of the fixing block (201), and a disc (203) is rotatably connected to the bottom end of the vertical rod (202) through a rotating shaft. The upper surface of the disc (203) is provided with multiple through-holes (204). The inner side of the delivery hole (204) is fitted with a storage tube (205), and a pressure plate (206) is slidably connected inside the storage tube (205). A puncture needle (207) is fixedly connected to the bottom of the pressure plate (206). A spring (208) is fixedly connected between the pressure plate (206) and the storage tube (205) and outside the puncture needle (207).

2. A modular lancing device with replaceable lancet as defined in claim 1, wherein: A trapezoidal pressure strip (107) is provided on the right side of the cylinder (101). Two springs (108) are fixedly connected to the trapezoidal pressure strip (107) and the opposite side of the cylinder (101). A stop block (109) is fixedly connected to the left side of the trapezoidal pressure strip (107). The left end of the stop block (109) passes through the right side of the cylinder (101) and is slidably connected to the cylinder (101). The trapezoidal pressure strip (107) is adapted to the L-shaped finger support (106).

3. The modular lancing device with replaceable lancet of claim 1, wherein: A rubber pressure block (110) is fixedly connected to the top of the push rod (103).

4. The modular lancing device with replaceable lancet of claim 1, wherein: The left end of the shaft (105) is fixedly connected to a gear (111) inside the cylinder (101). A guide block (112) is fixedly connected to the right side of the cylinder (101) below the gear (111). A toothed block (113) is slidably installed on the outside of the guide block (112). The toothed block (113) meshes with the gear (111). A spring (114) is fixedly connected between the toothed block (113) and the guide block (112).

5. A modular lancet pen with replaceable needles according to claim 1, characterized in that: The inner lower surface of the L-shaped finger support (106) is integrally formed with an arc-shaped support opening (115).

6. A modular lancet pen with replaceable needles according to claim 1, characterized in that: The outer wall of the disc (203) is provided with a plurality of limiting holes (209), the number of the limiting holes (209) is the same as the number of the delivery holes (204), and their positions correspond one to one.

7. A modular lancet pen with replaceable needles according to claim 6, characterized in that: A cover plate (210) is slidably connected to the outer wall of the vertical rod (202) and above the plurality of storage cylinders (205). The cover plate (210) and the fixing block (201) on the opposite side and on the outer side of the vertical rod (202) are jointly fixedly connected to a spring five (211).

8. A modular lancet pen with a replaceable needle according to claim 7, characterized in that: A through hole (212) is provided on the upper surface of the cover plate (210) and at the bottom end of the push rod (103).

9. A modular lancet pen with a replaceable needle according to claim 7, characterized in that: An L-shaped bracket (213) is fixedly connected to the left side of the cover plate (210). A positioning post (214) is slidably connected to the inner side of the L-shaped bracket (213). A spring (215) is fixedly connected between the positioning post (214) and the L-shaped bracket (213). The right end of the positioning post (214) is inserted into the interior of the limiting hole (209) located on the left side of the outer wall of the disc (203).

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