A shearing module and a pin breaker thereof

Abstract

This invention discloses a cutting module and its needle cutter. The needle cutter features an independent inner box design for single use, allowing for direct replacement once the inner box is full of needles. This not only reduces the probability of magnetic fields but also greatly simplifies use. Furthermore, this invention employs compression blocks and compression microswitches. Two upper and lower compression blocks respectively press the two sides of the needle cutting point, effectively improving cutting efficiency and speed. Simultaneously, the first and second blades work together for rapid cutting, effectively ensuring the cutting effect. Additionally, it utilizes inductive microswitches and compression microswitches for detection. The compression of the inductive microswitches determines whether the motor is running, and the compression microswitches determine whether cutting needs to be completed or has not been completed. The simultaneous triggering of the upper and lower compression microswitches determines whether cutting can proceed. Therefore, this invention, by using inductive microswitches to control the motor's start and stop, greatly improves safety.

Description

Technical Field

[0001] This utility model relates to medical auxiliary devices, and in particular to a cutting module and its needle cutter. Background Technology

[0002] After use, medical devices with sharp needles, such as infusion sets, need to have the needles cut off and stored separately before being disposed of as waste. Currently, the main method is to cut the needles with scissors, which is low-cost and reasonably efficient. However, this method carries the risk of needle prick for the operator, thus requiring a specialized device to assist in cutting the needles. Similar needle cutters exist, but they primarily employ a scissor-like design, simply with the scissors built into a box. After the needle is inserted, it is cut or severed by the blade. During this process, one end of the needle is suspended without restraint or support, leading to unsatisfactory cutting efficiency. Because the needle end is unrestrained, it drifts during the cutting process, resulting in a low success rate.

[0003] Therefore, how to achieve binding or fixation during needle cutting is a technical problem that needs to be solved. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a cutting module and a needle cutter, wherein the cutting module can clamp both sides of the needle cutting point before cutting.

[0005] To achieve the above objectives, this utility model provides a cutting module for cutting needles, comprising a mounting base, two cutting units, and a push block. The mounting base is fixed to a partition plate; the push block is mounted on one end of a push rod, and the other end of the push rod passes through the mounting base and is assembled and fixed to one end of a rack. A push block spring is fitted on the portion of the push rod located between the push block and the mounting base, and the push block spring applies a spring force to the push block away from the mounting base. The push block is close to a cam. The cutting unit includes a first link, a second link, and a third link. One end of the first link and the third link are respectively hinged to the mounting base. The other end of the third link is hinged to one end of the second link. The other ends of the second link and the first link are respectively hinged to the hinge seat. A half-tooth is provided or installed on the third link, and the third link is hinged to the mounting base through the half-tooth shaft. The half-tooth meshes with a gear for transmission, and the gear is assembled to the mounting base through a gear shaft. The gears of the two cutting units mesh with both sides of the rack for transmission. The hinge seat is fixedly mounted on the cutting frame, and a blade is installed on the cutting frame. The blades on the two cutting frames are the first blade and the second blade, which cooperate to cut the needle or the tubing connected to the needle.

[0006] As a further improvement of this utility model, the shearing unit also includes two extrusion boxes, the blade is installed between the two extrusion boxes, and the extrusion boxes are hollow inside and have extrusion blocks installed in a snap-fit ​​and sliding manner.

[0007] As a further improvement of this utility model, an extrusion block rod is installed on the extrusion block, the extrusion block rod is directly opposite the trigger end of the extrusion micro switch, the extrusion micro switch is installed inside the extrusion box, the extrusion block rod is assembled with one end of the extrusion spring, and the other end of the extrusion spring is pressed against the inner wall of the extrusion box.

[0008] This utility model also discloses a needle breaker, which includes the above-mentioned cutting module.

[0009] As a further improvement of this utility model, it also includes a housing, a top cover, and a touch switch. The housing has a hollow interior with an open top, and the top cover is mounted on the housing. A motor is installed inside the housing. A worm gear is installed or provided on the motor shaft of the motor. The worm gear meshes with a worm wheel for transmission. The worm wheel is fixedly mounted on one end of the transmission shaft. The other end of the transmission shaft enters the clutch hole and is assembled and fixed with the clutch head. The transmission shaft is assembled with the housing. The clutch hole is provided on the housing. The top cover is equipped with a partition, and a camshaft is installed on the partition. One end of the camshaft passes through the partition and is fixed to the clutch sleeve, while the other end enters the top cover and is fixed to the cam. A roller is installed on the cam. The clutch sleeve is fitted outside the clutch head, and the clutch sleeve and clutch head are pressed together for transmission.

[0010] As a further improvement of this utility model, a button base is also installed on the partition plate. A micro-switch is installed on one end of the mounting base. The mounting base is inserted into the button and can be axially slidably assembled with the inner side of the button. A button spring is installed between the inner closed end of the button and the end of the button base. The button spring applies a spring force to the button to move it away from the button base.

[0011] As a further improvement of this utility model, a button protrusion is installed on the inner side of the button, and the button protrusion is directly opposite the trigger end of the inductive micro switch.

[0012] As a further improvement of this utility model, the top cover is also provided with a top cover hole, which penetrates the top cover and the partition; an inner box is installed inside the outer shell cavity, the inner box is a hollow inner box cavity, and a through inner box hole is provided on the end of the inner box facing the partition, the inner box hole is directly opposite the top cover hole.

[0013] As a further improvement of this utility model, a flange is provided on the top of the outer shell, which is used to snap and assemble with the inner side of the top cover to achieve the top cover snap and fix it on the outer shell; the inner box is also provided with an inner box flange, and the inner box flange is close to the end face of the flange.

[0014] As a further improvement of this utility model, a sealing shaft is also installed on the inner box. One end of the sealing shaft enters the inner box cavity and is assembled with the sealing cover, while the other end is assembled and fixed with the knob. The sealing cover can close the inner box hole. The beneficial effects of this utility model are: This invention features an independent inner box design for single use, allowing for direct replacement once the inner box is full of needles. This not only reduces the probability of magnetic fields but also greatly facilitates use. Furthermore, this invention employs a squeezing block and a squeezing microswitch. Two upper and lower squeezing blocks respectively press the two sides of the needle cutting point, effectively improving cutting efficiency and speed. Simultaneously, the first and second blades work together for rapid cutting, effectively ensuring the cutting effect. Additionally, it utilizes inductive and squeezing microswitches for detection. The squeezing of the inductive microswitch determines whether the motor is running, and the squeezing microswitch determines whether cutting is necessary or not. Simultaneously triggering the upper and lower squeezing microswitches determines whether cutting is permissible. Since inserting a finger between the two squeezing blocks during use could easily cause the blade to cut and injure the user, this invention uses an inductive microswitch to control the motor's start and stop, and uses the simultaneous triggering of both upper and lower squeezing microswitches to determine whether the needle is clamped and cut, minimizing the possibility of user injury, thus greatly improving safety. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ; Figure 3 This is the explosive of this utility model. Figure 1 ; Figure 4 This is the explosive of this utility model. Figure 2 ; Figure 5 This is a cross-sectional view of the present invention located at the center plane of the axis of the transmission shaft 510; Figure 6 This is a cross-sectional view of the present invention located at the center plane of the inner box 200 axis; Figure 7 yes Figure 6 Enlarged view of point A in the middle; Figure 8 This is a partial structural schematic diagram of the present invention. Figure 1 ; Figure 9 This is a partial structural schematic diagram of the present invention. Figure 2 ; Figure 10 This is a partial structural schematic diagram of the present invention. Figure 3 ; Figure 11 This is a schematic diagram of the structure of the cutting module of this utility model; Figure 12 This is a partial structural diagram of the shearing module of this utility model. Figure 1 ; Figure 13 This is a partial structural diagram of the shearing module of this utility model. Figure 2 ; Figure 14 This is a structural diagram of the inner box with 200 points. Figure 1 ; Figure 15 This is a structural diagram of the inner box with 200 points. Figure 2 . Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] See Figures 1-10 The needle breaker of this embodiment includes a housing 110, a top cover 120, and a touch switch 130. The housing 110 has a hollow cavity 111 with an open top. A flange 112 is provided on the top of the housing 110. The flange 112 is used to clamp and assemble with the inside of the top cover 120 to achieve the top cover 120 being clamped and fixed on the housing 110.

[0018] A motor 410 is installed inside the housing 110. A worm gear 321 is installed or provided on the motor shaft 411 of the motor 410. The worm gear 321 meshes with a worm wheel 322 for transmission. The worm wheel 322 is fitted and fixed on one end of the transmission shaft 510. The other end of the transmission shaft 510 enters the clutch hole 113 and is assembled and fixed with the clutch head 311. The transmission shaft 510 and the housing 110 are rotatable but not axially movable. The clutch hole 113 is provided on the housing 110.

[0019] A partition 140 is installed inside the top cover 120. A camshaft 520 is mounted on the partition 140 in a circumferentially rotatable manner but not axially movable manner. One end of the camshaft 520 passes through the partition 140 and is assembled and fixed with the clutch sleeve 312. The other end enters the top cover 120 and is assembled and fixed with the cam 330. A roller 331 is mounted on the cam 330 in a circumferentially rotatable manner. The clutch sleeve 312 is fitted outside the clutch head 311. The clutch sleeve 312 and the clutch head 311 are pressed together for transmission.

[0020] A button base 142 is also mounted on the partition 140. A micro switch 420 is mounted on one end of the mounting base 142. The mounting base 142 is inserted into the button 130 and is axially slidably assembled with the inner side of the button 130. A button spring 101 is installed between the inner closed end of the button 130 and the end of the button base 142. The button spring 101 applies a spring force to the button 130 to move it away from the button base 142. A button protrusion 131 is mounted on the inner side of the button 130, and the button protrusion 131 is directly opposite the trigger end 420 of the micro switch 420. (See also...) Figure 5 When button 130 is pressed down, it overcomes the elastic force of button spring 101 and moves downward. The button protrusion 131 then presses the inductive microswitch 420. Once triggered, the inductive microswitch 420 sends a signal to the controller, which determines that button 130 has been triggered. In this embodiment, the controller is installed inside the housing 110, and the controller can be an MCU, CPU, PLC, etc.

[0021] The top cover 120 is also provided with a top cover hole 121, which penetrates the top cover 120 and the partition 140 to facilitate the passage of the needle 01.

[0022] An inner box 200 is installed inside the outer shell cavity 111. The inner box has a hollow inner box cavity 202. A through inner box hole 201 is provided on the end of the inner box 200 facing the partition 140. The inner box hole 201 is aligned with the top cover hole 121 to facilitate the insertion of the needle.

[0023] Combination Figures 14-15 The inner box 200 is also provided with an inner box flange 210, which is closely fitted to the end face of the flange 112 to facilitate the removal of the inner box 200. A sealing shaft 230 can also be rotatably mounted on the inner box 200. One end of the sealing shaft 230 enters the inner box cavity 202 and is assembled with the sealing cover 240, while the other end is assembled and fixed with the knob 220. In use, the sealing shaft 230 can be rotated by the knob, thereby driving the sealing cover 240 to rotate, so that the sealing cover 240 closes the inner box hole 201, or moves the sealing cover away from the inner box hole 201 to open the inner box hole 201. When in use, the sealing cover 240 is moved away from the inner box hole 201 to facilitate needle insertion. When it is necessary to remove the inner box 200, the knob is rotated to close the inner box hole 201 with the sealing cover 240 to prevent the needle from falling out. The inner box 200 is made of a transparent hard material, which can effectively prevent punctures. Furthermore, the inner box 200 is for single use, so the needles can be protected when discarding them, preventing them from being punctured by waste disposal personnel.

[0024] Combination Figures 1-15A cutting module is installed inside the top cover 120. The cutting module is used to cut the needle tip. The cutting module includes a mounting base 141, a cutting unit, and a push block 340. The mounting base 141 is fixed on the partition plate 140. The push block 340 is installed on one end of the push rod 530. The other end of the push rod 530 passes through the mounting base 141 and is assembled and fixed to one end of the rack 350. A push block spring 501 is fitted on the part of the push rod 530 located between the push block 340 and the mounting base 141. The push block spring 501 applies a spring force to the push block 340 away from the mounting base 141. The push block 340 is close to the cam 330. When the long shaft end of the cam 330 rotates to press against the push block 340, it will gradually squeeze the push block 340 until the long shaft end of the cam 330 separates from the push block. This allows the cam to intermittently push the push block and push rod to overcome the elastic force of the push block spring 501 when it rotates, which in turn drives the rack 360 to move.

[0025] The shearing unit includes a first connecting rod 710, a second connecting rod 720, and a third connecting rod 730. One end of the first connecting rod 710 and the third connecting rod 730 are respectively hinged to the mounting base 141, and the other end of the third connecting rod 730 is hinged to one end of the second connecting rod 720. The other ends of the second connecting rod 720 and the first connecting rod 710 are respectively hinged to the hinge seat 611. A half tooth 370 is provided or installed on the third connecting rod 730, and the third connecting rod 730 is hinged to the mounting base 141 through the half tooth shaft 371. The half tooth 370 meshes with the gear 360 for transmission, and the gear 360 is rotatably assembled with the mounting base 141 through the gear shaft 361. The gears 360 of the two shearing units mesh with both sides of the rack 350 for transmission. When the rack moves, it drives the gear to rotate. The rotation of the gear drives the half gear 370 and the third connecting rod 730 to rotate, thereby causing the hinge seats 611 of the two shearing units to move closer or further away synchronously.

[0026] The hinge seat 611 is fixedly mounted on the shearing frame 610. Two compression boxes 620 and a blade are mounted on the shearing frame 610. The blade is installed between the two compression boxes 620. Each compression box 620 is hollow and has a compression block 630 that is engaged and slidably mounted. A compression block rod 631 is mounted on the compression block 630, and the compression block rod 631 is directly opposite the trigger end of a compression microswitch 430. The compression microswitch 430 is installed inside the compression box 620. One end of the compression block rod 631 is fitted with a compression spring 601, and the other end of the compression spring 601 is pressed against the inner wall of the compression box 620, thereby applying a spring force to the compression block 630 to prevent it from moving towards the compression microswitch 430, so that the compression microswitch 430 is not triggered in the initial state. The signal from the compression microswitch 430 is connected to the controller. When the compression microswitch 430 is triggered, it inputs a signal to the controller, which determines whether the corresponding compression block 630 is pressed against the needle or tubing.

[0027] The blade is divided into a first blade 641 and a second blade 642, which are respectively mounted on two cutting frames 610. In use, the first blade 641 and the second blade 642 are used to cut the needle or the tubing connected to the needle. When the rack moves, the two cutting frames 610 move closer to or further away from each other.

[0028] The usage process of this embodiment is as follows: S1. Pass one end of the needle through the top cover hole 121, and press the button switch 130 with the hand holding the needle. After the button switch 130 is triggered, it sends a signal to the controller. The controller controls the motor to start, which drives the transmission shaft 510 to rotate. The transmission shaft drives the cam shaft 520 to rotate. The long shaft end of the cam 520 gradually squeezes the push block, thereby driving the two shearing frames 610 to move closer to each other.

[0029] S2. If all four microswitches are triggered, it means that the first and second blades have completed cutting, and the motor will then reverse and reset. (See also...) Figure 7 If at least one of the two upper pressure microswitches is triggered while the lower pressure microswitch is not triggered, the motor reverses, and the two shear brackets 610 move away from each other, as there is a possibility that the user's finger may be inserted. When the user presses the inductive microswitch again, the motor restarts. If the situation persists, the user is alerted via indicator light or voice prompts. If the user confirms there is no problem, they can force operation by quickly pressing the pressure switch 130 twice. This design is primarily for user safety. The pressure switch 130 is designed for ease of use, as the motor only runs while the pressure switch 130 is pressed; it stops immediately upon release. When using the device, holding the needle or its connecting tube will inevitably press the pressure switch 130. Once the pressure switch stops, it indicates a potential danger to the user, and the motor stops to ensure safety.

[0030] S3, see also Figure 5 The severed needle falls into the inner box cavity 202 for storage. When the inner box needs to be removed later, pull up the top cover 120 to open it, then turn the knob to close the inner box hole 201 with the sealing cover 240, allowing the inner box 200 to be removed and replaced with a new one. In this embodiment, the top cover 120 and the outer shell 110 can be made of transparent material for easy observation by the user.

[0031] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application pertains.

[0032] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0033] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly defined.

[0034] In this application, a circumferentially rotatable assembly is a connection assembly that can rotate relative to each other, such as an assembly using bearings; a circumferentially rotatable but axially movable assembly is one that can rotate relative to each other but cannot move axially, such as by installing shaft clips on both sides of the shaft and the mounting device to prevent the shaft from moving axially; a circumferentially rotatable and axially movable assembly is a movable assembly, such as an assembly where the shaft passes through a shaft hole; an assembly that cannot rotate circumferentially but can move axially can be an assembly using spline grooves or spline mating.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A cutting module for cutting off needles, characterized in that: The device includes a mounting base, two shearing units, and a push block. The mounting base is fixed to a partition plate. The push block is mounted on one end of a push rod, and the other end of the push rod passes through the mounting base and is assembled and fixed to one end of a rack. A push block spring is fitted on the part of the push rod located between the push block and the mounting base. The push block spring applies a spring force to the push block away from the mounting base, and the push block is close to the cam. The cutting unit includes a first link, a second link, and a third link. One end of the first link and the third link are respectively hinged to the mounting base. The other end of the third link is hinged to one end of the second link. The other ends of the second link and the first link are respectively hinged to the hinge seat. A half-tooth is provided or installed on the third link, and the third link is hinged to the mounting base through the half-tooth shaft. The half-tooth meshes with a gear for transmission, and the gear is assembled to the mounting base through a gear shaft. The gears of the two cutting units mesh with both sides of the rack for transmission. The hinge seat is fixedly mounted on the cutting frame, and a blade is installed on the cutting frame. The blades on the two cutting frames are the first blade and the second blade, which cooperate to cut the needle or the tubing connected to the needle.

2. The cutting module as described in claim 1, characterized in that: The shearing unit also includes two compression boxes, with the blade installed between the two compression boxes. The compression boxes are hollow and have compression blocks that are engaged and slidably installed inside.

3. The cutting module as described in claim 2, characterized in that: An extrusion block rod is installed on the extrusion block, and the extrusion block rod is directly opposite the trigger end of the extrusion micro switch. The extrusion micro switch is installed inside the extrusion box. One end of the extrusion block rod is assembled with one end of the extrusion spring, and the other end of the extrusion spring is pressed against the inner wall of the extrusion box.

4. A needle breaker, characterized in that: Includes the cutting module as described in any one of claims 1-3.

5. The needle breaker as described in claim 4, characterized in that: It also includes a housing, a top cover, and a touch switch. The housing has a hollow interior with an open top, and the top cover is mounted on the housing. A motor is installed inside the housing. A worm gear is installed or provided on the motor shaft of the motor. The worm gear meshes with a worm wheel for transmission. The worm wheel is fixedly mounted on one end of the transmission shaft. The other end of the transmission shaft enters the clutch hole and is assembled and fixed with the clutch head. The transmission shaft is assembled with the housing. The clutch hole is provided on the housing. The top cover is equipped with a partition, and a camshaft is installed on the partition. One end of the camshaft passes through the partition and is fixed to the clutch sleeve, while the other end enters the top cover and is fixed to the cam. A roller is installed on the cam. The clutch sleeve is fitted outside the clutch head, and the clutch sleeve and clutch head are pressed together for transmission.

6. The needle breaker as described in claim 4, characterized in that: A button base is also installed on the partition. A micro switch is installed on one end of the mounting base. The mounting base is inserted into the button and can be axially slidably assembled with the inner side of the button. A button spring is installed between the inner closed end of the button and the end of the button base. The button spring applies a spring force to the button to move it away from the button base.

7. The needle breaker as described in claim 6, characterized in that: The button has a button protrusion installed on its inner side, which is directly opposite the trigger end of the inductive micro switch.

8. The needle breaker as described in claim 5, characterized in that: The top cover is also provided with a top cover hole, which penetrates the top cover and the partition; an inner box is installed inside the outer shell cavity, the inner box is a hollow inner box cavity, and a through inner box hole is provided on the end of the inner box facing the partition, the inner box hole is directly opposite the top cover hole.

9. The needle breaker as described in claim 8, characterized in that: The top of the outer shell is provided with a flange, which is used to snap and assemble with the inside of the top cover to achieve the top cover being snapped and fixed on the outer shell; the inner box is also provided with an inner box flange, which is in close contact with the end face of the flange.

10. The needle breaker as described in claim 8 or 9, characterized in that: The inner box is also equipped with a sealing shaft. One end of the sealing shaft enters the inner box cavity and is assembled with the sealing cover, while the other end is assembled and fixed with the knob. The sealing cover can close the inner box hole.

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