A nipple and a gas return tube cutting tool and method for the same

Abstract

The application relates to a nipple and a processing tool and a processing method for a gas return pipe cut of the nipple, which comprise a base, a supporting column, a sliding ring and a cutter. The supporting column is fixed to the base, the sliding ring is sleeved outside the supporting column, the cutter is arranged at the top of the supporting column and protrudes to the side, the upper edge of the cutter is an inclined non-edge surface, and the lower edge is a cutter edge. A slot hole corresponding to the cutter is arranged at the top of the sliding ring and is matched with the gas return pipe, and an inside wall is provided with a cutter entry gap which is communicated with the inside of the slot hole. The screw holes in the side wall of the supporting column and the strip-shaped holes in the sliding ring are matched through bolts to define a downward limit position, at which the cutter is lower than the upper surface of the sliding ring and the cutter edge extends into the slot hole. During work, the gas return pipe is inserted into the slot hole, the sliding ring is lowered to the limit position, the cutter guide inclined surface pushes away the gas return pipe without cutting, the nipple is pulled up, and the cutter edge cuts the inside wall of the gas return pipe in a tight state from top to bottom to form a cut. The cutter only acts on the inside wall, and the cut position is accurate, neat and consistent.

Description

Technical Field

[0001] This invention relates to the field of nipple processing technology, specifically to a nipple and a tool and method for processing the air return tube cut. Background Technology

[0002] A nipple is a feeding product attached to a baby bottle for infants to suckle, and it is usually made of silicone. To balance the air pressure inside and outside the bottle and prevent infants from swallowing too much air and causing bloating due to negative pressure generated during sucking, the nipple connection usually has a venting tube structure.

[0003] Chinese utility model patent CN202387000U discloses an automatic venting nipple. The bottom of its venting tube is sealed, and the side wall of the venting tube has a slit. Automatic venting is achieved by opening and closing the slit in the side wall. Compared to setting a slit at the bottom of the venting tube, the slit in the side wall offers superior fatigue resistance and sealing performance. In actual production, the venting tube of the nipple is usually formed into a closed tubular structure during molding, and the slit in the side wall of the venting tube needs to be formed through secondary processing after molding.

[0004] Currently, the processing of the sidewall incisions in the vent tube mainly relies on manual cutting of each vent tube with a blade. Since the vent tube is a small tubular structure protruding from the underside of the nipple, and its wall is made of soft silicone, the following problems arise during cutting: The soft silicone is prone to bending and deformation under the pressure of the blade, making it impossible for the tube wall to remain flat. This results in difficulty for the blade to cut smoothly, leading to uneven cut edges and affecting the sealing performance. During manual cutting, the cutting force and depth depend on the operator's feel, making it difficult to maintain consistent cut depth and length between different cuts. Manual cutting makes it difficult to precisely control the circumferential position of the cut on the vent tube's sidewall, easily resulting in misaligned cuts or even cutting through the opposite sidewall of the vent tube, leading to sealing failure.

[0005] To address the problems of existing soft silicone air return tube incisions relying on manual cutting, resulting in uneven cut edges, difficulty in precisely controlling the cut position, and easy misalignment of the cut, this invention provides a nipple and its air return tube incision processing tool and processing method.

[0006] The technical solution of this invention is as follows: A tool for cutting the vent tube of a nipple, comprising: Base and support column mounted on the base; A sliding ring is fitted onto the support column; At least one cutter is disposed at the top of the support column and protrudes to the side of the support column, the lower edge of the cutter is configured as a cutting edge, and the upper edge of the cutter is configured as an inclined non-cutting surface; The top of the sliding ring near the inner ring opening has a slot corresponding to the position of each cutter. The inner sidewall of the sliding ring has a cutter inlet gap corresponding to each slot. The cutter inlet gap extends from the bottom to the top of the inner sidewall of the sliding ring along the axial direction of the sliding ring and communicates with the inner side of the slot. The side wall of the support column is provided with a screw hole, and the sliding ring is provided with a strip hole that penetrates the ring body. After the bolt passes through the strip hole, it is installed in the screw hole. The bolt abuts against the upper end of the strip hole to limit the downward limit position of the sliding ring. When the sliding ring is at the downward limit position, the cutter is lower than the upper surface of the sliding ring and the cutting edge of the cutter extends into the slot.

[0007] As a preferred embodiment of the present invention, there are three cutters, which are evenly distributed along the circumference of the support column; there are three corresponding slots and three corresponding cutter inlets.

[0008] As a preferred embodiment of the present invention, the diameter of the slot is adapted to the outer diameter of the nipple air return tube, and the depth of the slot is not less than the length of the nipple air return tube.

[0009] As a preferred embodiment of the present invention, the length of the cutter protruding toward the side of the support column is such that the cutter extends at least into the slot and does not exceed the center of the slot.

[0010] As a preferred embodiment of the present invention, the strip-shaped hole is disposed between two adjacent slots.

[0011] As a preferred embodiment of the present invention, it further includes a spring disposed between the sliding ring and the base, one end of the spring abutting against the lower surface of the sliding ring and the other end abutting against the base; the spring pushes the sliding ring upward along the support column, and the bolt abuts against the lower end of the strip hole to limit the upward limit position of the sliding ring.

[0012] As a preferred embodiment of the present invention, the top surface of the support column is provided with three tool holder protrusions, the three tool holder protrusions are fan-shaped and distributed along the circumference of the support column; each tool holder protrusion is provided with an assembly groove on the same side wall, and the cutter is embedded in the assembly groove.

[0013] Furthermore, it also includes a locking block; the locking block is disc-shaped and has three fan-shaped notches, the three fan-shaped notches correspond to the three blade holder bosses, and the locking block and the three blade holder bosses are assembled to form a complete disc; the locking block has a through hole in the center, the support column has a screw hole in the center of the top surface, the locking block is locked to the top surface of the support column by bolts, and each cutter is clamped and fixed between the corresponding blade holder boss and the locking block.

[0014] This invention also provides a method for processing a nipple vent tube cut, using the nipple vent tube cut processing tool described above, including the following steps: Step S1: Place the nipple connector on the upper surface of the sliding ring so that the nipple's air return tube is inserted into the corresponding slot. Step S2: When the sliding ring is placed at the downward limit position, during the downward movement of the nipple's air return tube relative to the cutter, the inclined upper edge of the cutter pushes the air return tube away without cutting it when it contacts the side wall of the air return tube. Step S3: Pull the nipple upwards. As the air return tube moves upwards relative to the cutter, the lower edge of the cutter makes a cut from top to bottom on the inner wall of the air return tube facing the center of the support column.

[0015] Furthermore, a spring is provided between the sliding ring and the base. Step S2 is specifically as follows: Press down on the nipple to drive the sliding ring down along the support column to the lower limit position; during the descent, the sliding ring compresses the spring, and the cutter enters the slot from bottom to top relative to the sliding ring through the cutter gap. When the inclined upper edge of the cutter contacts the side wall of the return air pipe, it pushes the return air pipe away without cutting the return air pipe.

[0016] Furthermore, a spring is provided between the sliding ring and the base. During the process of pulling up the nipple in step S3, the spring rebounds and drives the sliding ring to move upward along the support column; the spring lifts the sliding ring to the upper limit position, and the cutter is located in the inlet gap and below the slot.

[0017] The present invention also provides a nipple, including a nipple body and a connecting part. At least one air return tube is provided on the lower surface of the connecting part where it connects with the nipple body. The side wall of the air return tube is provided with a cut. The cut is located on the inner side of the air return tube facing the center of the nipple body. The cut is formed on the air return tube by the nipple air return tube cutting processing method described above.

[0018] Preferably, there are three return air pipes, which are evenly distributed around the circumference of the connection; the cut is a vertical cut extending along the axial direction of the return air pipe.

[0019] According to the above-described solution, the beneficial effects of this invention are as follows: The cutter of the present invention is fixed to the top of the support column. The lower edge of the cutter is set as the blade and the upper edge is set as an inclined non-blade surface. This structure allows the nipple air return tube to descend relative to the cutter. The inclined upper edge of the cutter first contacts the side wall of the air return tube. Since the upper edge is a non-blade surface and is inclined, the inclined surface pushes the side wall of the air return tube outward without cutting the air return tube, and the air return tube safely passes the cutter. When the nipple air return tube ascends relative to the cutter, the lower edge of the cutter contacts the side wall of the air return tube, and the blade cuts from top to bottom on the side wall of the air return tube to form a cut.

[0020] During the upward cutting process, the return air pipe moves upward, while the blade of the cutter exerts a downward resistance force on the side wall of the return air pipe. The two opposing forces cause the side wall of the return air pipe to be in a stretched and taut state in the cutting area. The silicone wall surface in the taut state is flat and has tension, which is conducive to the blade cutting smoothly and forming a neat cut edge. Compared with the situation where the side wall of the return air pipe is squeezed and bent during the downward cutting process, which is not conducive to cutting, the cutting quality is significantly improved.

[0021] The inlet slit and the cutter form a guiding fit in the sliding direction. The cutter is fitted into the inlet slit and slides axially. This fit restricts the circumferential freedom of the sliding ring relative to the support column, preventing the sliding ring from rotating during sliding and causing misalignment between the slot and the cutter, thus ensuring cutting accuracy. The fit between the strip hole and the bolt further provides circumferential constraint, forming a double anti-rotation structure together with the inlet slit. This avoids the risk of the cutter breaking when the sliding ring is subjected to sudden circumferential force, as relying solely on the thin-plate cutter and the inlet slit to resist rotation could lead to the cutter breaking. This protects the cutter.

[0022] Furthermore, after installing a spring between the sliding ring and the base, the spring will lift the sliding ring to the upper limit position in its natural state. At this time, the cutter is located in the cutter gap and below the slot, and the cutter is completely hidden. When the operator inserts the nipple air return tube into the slot, his / her fingers will not touch the blade, ensuring the safety of the operation during the nipple placement process. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an exploded view of the structure of the present invention; Figure 3 This is a schematic diagram of the structure at the top of the support column; Figure 4 This is a cross-sectional view of the sliding ring at its upper limit position. Figure 5 This is a cross-sectional view of the sliding ring at its downward limit position. Figure 6 A schematic diagram of a tool equipped with a spring, showing the sliding ring at its upper limit position. Figure 7A schematic diagram of a tool equipped with a spring, showing the sliding ring at its downward limit position. Figure 8 This is a schematic diagram of the nipple structure in a specific embodiment.

[0024] In the diagram, 10 is the base; 20 is the support column; 21 is the blade holder boss; 22 is the assembly slot; 23 is the center screw hole; 24 is the side wall screw hole; 30 is the sliding ring; 31 is the slot; 32 is the blade entry gap; 33 is the strip hole; 40 is the spring; 50 is the cutter; 51 is the blade edge; 52 is the non-blade surface; 60 is the locking block; 61 is the fan-shaped notch; 62 is the through hole; 70 is the first bolt; 80 is the second bolt; 90 is the nipple; 91 is the nipple body; 92 is the connecting part; 93 is the air return pipe; and 94 is the cut. Detailed Implementation

[0025] To better understand the purpose, technical solution, and technical effects of this invention, the invention will be further explained and described below in conjunction with the accompanying drawings and embodiments. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. It is also stated that the embodiments described below are only for explaining this invention and are not intended to limit this invention.

[0026] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is referred to as "connected to" another component, it can be directly connected to the other component or there may be an intermediate component.

[0027] The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed when in use, or the orientation or positional relationship in which a person skilled in the art would normally understand it, or the orientation or positional relationship in which the product is usually placed when in use. It is only for the purpose of facilitating the description of this application and simplifying the description, and is not intended to 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.

[0028] like Figure 1 and Figure 8As shown, this invention provides a tool for cutting the vent tube of a nipple, including a base 10, a support column 20, a sliding ring 30, a spring 40, and a cutter 50. The base 10 is a disc-shaped structure used to place on a workbench, providing a stable support base for the entire tool. The support column 20 is vertically mounted at the center of the upper surface of the base 10. The support column 20 is a cylinder, and its outer diameter is smaller than the inner diameter of the sliding ring 30, allowing the sliding ring 30 to be fitted onto the outside of the support column 20. The sliding ring 30 is fitted onto the support column 20 and can slide up and down along the axial direction of the support column 20. The spring 40 is fitted onto the support column 20, located between the sliding ring 30 and the base 10. The upper end of the spring 40 abuts against the lower surface of the sliding ring 30, and the lower end abuts against the upper surface of the base 10. In its natural state, the spring 40 pushes the sliding ring 30 upwards to its initial position.

[0029] like Figure 2 and Figure 3 As shown, the cutter 50 is located at the top of the support column 20 and protrudes to the side of the support column 20. In this embodiment, there are three cutters 50, which are evenly distributed along the circumference of the support column 20. The three cutters 50 are arranged at equal angles along the circumference of the support column 20, so that the force state of the three cutters 50 when cutting the return air pipe 93 is completely symmetrical, and the forming conditions and cutting quality of each cut 94 are completely consistent, thus ensuring the symmetry and consistency of the three cuts 94 structurally.

[0030] like Figure 3 As shown, the lower edge of each cutter 50 is configured as a cutting edge 51, and the upper edge is configured as an inclined non-cutting surface 52. Specifically, the cutting edge 51 is a sharp cutting edge used to cut the side wall of the return air pipe 93 during its upward movement relative to the cutter 50; the inclined non-cutting surface 52 extends outward and upward from the upper edge of the cutter 50, forming a smooth guiding slope. This slope pushes the return air pipe 93 outward without cutting the pipe wall when it contacts the side wall during its downward movement relative to the cutter 50. The cutting edge design of the cutter 50 of this invention is fundamentally different from the cutting methods of the prior art that directly use double-sided cutting edges or simple cutting edges. In the traditional cutter structure, the operator holds the blade and presses it directly to cut, and the cutting action occurs the moment the blade contacts the pipe wall, and the timing of the cutting depends entirely on the operator's judgment. However, this invention, through the asymmetrical cutting edge design, locks the cutting timing at the specific stage of removing the nipple.

[0031] The top surface of the support column 20 is provided with three tool holder bosses 21. The three tool holder bosses 21 are fan-shaped and evenly distributed along the circumference of the support column 20. Each tool holder boss 21 has an assembly groove 22 on the same side wall. The three assembly grooves 22 are all located on the same side of each tool holder boss 21 (for example, all located on the side wall in a clockwise direction) to ensure that the three cutters 50 are evenly distributed on the support column 20. Structurally, this ensures the uniformity of the angle of the three cutters at the top of the support column, providing a reliable positioning basis for the simultaneous forming of the three subsequent cuts 94. The cutter 50 is embedded in the assembly groove 22, with the cutter body of the cutter 50 housed in the assembly groove 22. The cutting edge 51 and the inclined non-cutting surface 52 protrude toward the side of the support column 20.

[0032] like Figure 2 As shown, the present invention also includes a locking block 60. The locking block 60 is disc-shaped with three fan-shaped notches 61. The three fan-shaped notches 61 correspond one-to-one with the three tool holder protrusions 21. After aligning the three fan-shaped notches 61 of the locking block 60 with the three tool holder protrusions 21, it is placed on the top surface of the support column 20 from top to bottom. The disc body of the locking block 60 fills the gap between two adjacent tool holder protrusions 21, and the locking block 60 and the three tool holder protrusions 21 are assembled to form a complete disc. From an external visual perspective, the locking block and the tool holder protrusions are assembled into a complete disc, which seals the top surface of the support column, preventing dust and debris from entering the support column and affecting the tool's accuracy, and also making the tool's appearance neat and beautiful. Functionally, the disc body of the locking block fills the gap between the three tool holder protrusions, forming a lateral constraint on each tool holder protrusion. Together with the locking block pressing from above, they achieve the clamping and positioning of the cutting blade 50.

[0033] The locking block 60 has a through hole 62 at its center, and the support column 20 has a central screw hole 23 at its top center. A bolt (defined as the first bolt 70) passes through the through hole 62 and is screwed into the central screw hole 23, thus locking the locking block 60 to the top surface of the support column 20. Each cutter 50 is clamped and fixed between the corresponding cutter head boss 21 and the locking block 60, achieving a stable installation of the cutter 50. The cutter 50 will not loosen, shift, or fall off due to vibrations caused by repeated operation, ensuring that the tool maintains its cutting accuracy throughout long-term use.

[0034] The top of the sliding ring 30, near the inner ring opening, has a slot 31 corresponding to each cutter 50. In this embodiment, there are three slots 31, which are evenly distributed along the circumference of the sliding ring 30. The diameter of the slot 31 is adapted to the outer diameter of the nipple air return tube 93, allowing the air return tube 93 to be inserted into the slot 31. The depth of the slot 31 is not less than the length of the air return tube 93, ensuring that the air return tube 93 can be fully inserted into the slot 31.

[0035] The inner wall of the sliding ring 30 is provided with a cutting slot 32 corresponding to each slot 31. The cutting slot 32 extends from the bottom to the top of the inner wall of the sliding ring 30 along the axial direction and communicates with the inner side of the slot 31. The width of the cutting slot 32 is adapted to the thickness of the cutter 50, so that the cutter 50 can pass smoothly within the cutting slot 32. When the sliding ring 30 is fitted onto the support column 20, each cutter 50 is inserted into a corresponding cutting slot 32, and the cutter 50 can slide relative to each other in the axial direction within the cutting slot 32.

[0036] The length of the cutter 50 protruding towards the side of the support column 20 ensures that the cutter 50 extends at least into the slot 31, but does not exceed half the radial radius of the slot 31. This limited protrusion length ensures that the cutter 50 can only contact the inner wall of the return air pipe 93 inserted into the slot 31, and cannot reach the bottom of the return air pipe 93 or the outer wall away from the center, thus ensuring that the cut 94 is formed only on the inner surface of the return air pipe 93. Therefore, as long as the return air pipe is correctly inserted into the slot 31, the cutter 50 cannot cut the outer wall of the return air pipe regardless of the operator's operation.

[0037] like Figure 2 As shown, the sidewall of the support column 20 is provided with a sidewall screw hole 24, and the sliding ring 30 is provided with a strip-shaped hole 33 that penetrates the ring body. The strip-shaped hole 33 extends along the axial direction of the sliding ring 30 and is located between two adjacent slots 31, without interfering with any slot 31 or the cutter gap 32. A bolt (this bolt is defined as the second bolt 80) passes through the strip-shaped hole 33 and is screwed into the sidewall screw hole 24.

[0038] As the sliding ring 30 descends along the support column 20, the second bolt 80 moves upward relative to the slot 33. When the head of the second bolt 80 abuts against the upper end of the slot 33, the sliding ring 30 is restricted from continuing to descend; this is the downward limit position of the sliding ring 30.

[0039] When the sliding ring 30 is at its downward limit position, the cutter 50 is below the upper surface of the sliding ring 30, and the blade 51 of the cutter 50 has extended into the slot 31. This design has two functions: first, the cutter 50 is hidden inside the slot 31 and does not protrude above the upper surface of the sliding ring 30, avoiding damage to other parts of the nipple 90; second, the blade 51 has extended into the slot 31 and is at the upper edge of the cut to be made, so that cutting can begin immediately when the operator pulls it upward, without the need for alignment adjustment.

[0040] The engagement of the slotted hole 33 with the second bolt 80 also provides circumferential constraint on the sliding ring 30. The slotted hole 33 extends axially, and the second bolt 80 is embedded in it. When the sliding ring 30 is subjected to circumferential force, the second bolt 80 abuts against the sidewall of the slotted hole 33 to prevent rotation. This circumferential constraint, together with the guiding engagement between the inlet slit 32 and the cutter 50, constitutes a dual anti-rotation structure: the engagement of the inlet slit 32 and the cutter 50 provides basic circumferential positioning, while the engagement of the slotted hole 33 and the second bolt 80 provides reinforcing circumferential constraint. This avoids the risk of the cutter 50 breaking when subjected to sudden circumferential force, as it relies solely on the thin-plate cutter 50 and the inlet slit 32 to resist rotation. This protects the cutter 50.

[0041] As a preferred embodiment, the present invention further includes a spring 40. The spring 40 is sleeved on the support column 20, located between the sliding ring 30 and the base 10. The upper end of the spring 40 abuts against the lower surface of the sliding ring 30, and the lower end abuts against the upper surface of the base 10. The spring 40 pushes the sliding ring 30 upward along the support column 20. The second bolt 80 abuts against the lower end of the slotted hole 33 to limit the upward limit position of the sliding ring 30, preventing the spring 40 from pushing the sliding ring 30 out of the support column 20.

[0042] In its natural state, the spring 40 lifts the sliding ring 30 to its upper limit position. At this point, the cutter 50 is located within the entry gap 32 and below the slot 31, completely concealed within the sliding ring 30. Compared to the springless design where the cutter 50 is below the upper surface but already inserted into the slot 31 when the sliding ring 30 is at its lower limit position, the spring-loaded design further retracts the cutter 50 into the entry gap 32 in the initial standby state, completely disengaging it from the slot 31 area. This eliminates the risk of the operator contacting the blade 51 at any time, further enhancing safety.

[0043] At this point, the upper and lower ends of the second bolt 80 and the strip hole 33 respectively define the downward limit position and the upward limit position, and the length of the strip hole 33 is the complete sliding stroke of the sliding ring 30. The stroke limiting structure allows the operator to press quickly to the downward limit position without having to carefully control the pressing depth.

[0044] The assembly sequence of this invention is as follows: First, the three cutters 50 are respectively embedded into the mounting slots 22 of the three cutter head protrusions 21 on the top surface of the support column 20. Then, the three fan-shaped notches 61 of the locking block 60 are aligned with the three cutter head protrusions 21 and placed on the top surface of the support column 20 from top to bottom. The locking block 60 is locked and fixed by the first bolt 70, so that each cutter 50 is clamped between the cutter head protrusion 21 and the locking block 60.

[0045] If spring 40 is used, spring 40 is placed on support column 20 before sliding ring 30 is installed, with the lower end of spring 40 abutting against base 10.

[0046] Finally, the sliding ring 30 is fitted onto the support column 20 from top to bottom. During the fitting process, the three cutters 50 are aligned with and enter the three cutter slots 32 on the inner side wall of the sliding ring 30, and the sliding ring 30 falls into place. Then, the second bolt 80 is screwed into the side wall screw hole 24 through the strip hole 33 to complete the installation of the limiting structure.

[0047] like Figure 1 , Figure 6 and Figure 7 As shown, the method for processing the nipple air return tube cut of the present invention is as follows: Step S1: Place the connecting part 92 of the nipple 90 on the upper surface of the sliding ring 30, so that the three air return tubes 93 of the nipple 90 are respectively inserted into the three slots 31 at the top of the sliding ring 30. Since the diameter of the slot 31 matches the outer diameter of the air return tube 93, the air return tube 93 is positioned and constrained by the slot 31.

[0048] Step S2: Position the sliding ring 30 at its downward limit. During the downward movement of the sliding ring 30 to its downward limit, the return air pipe 93 moves downward relative to the cutter 50, and the cutter 50 enters the slot 31 through the entry gap 32. The inclined non-cutting surface 52 of the cutter 50 first contacts the inner wall of the return air pipe 93. Because the inclined non-cutting surface 52 is a smooth inclined surface rather than a cutting edge, the inclined surface pushes the pipe wall of the return air pipe 93 outward without cutting it. After elastic deformation, the return air pipe 93 safely passes the cutter 50. When the sliding ring 30 reaches its downward limit, the cutter 50 is below the upper surface of the sliding ring 30, and the cutting edge 51 extends into the slot 31.

[0049] Step S3: Pull the nipple 90 upwards. The cutter 50 remains fixed at the top of the support column 20. The vent tube 93 moves upwards relative to the cutter 50. The blade 51 of the cutter 50 contacts the inner wall of the vent tube 93 facing the center of the support column 20. The blade 51 generates downward cutting resistance against the tube wall. The two opposing forces cause the inner wall of the vent tube 93 to be stretched and taut in the cutting area. The blade 51 cuts downwards on the taut tube wall, forming a vertical cut 94 extending along the axial direction of the vent tube 93. The cuts 94 of the three vent tubes 93 are completed simultaneously in the same pulling operation. The cuts 94 are all located on the inner side of each vent tube 93 facing the center of the nipple body 91, and the cuts are symmetrical in position and consistent in size. Since the depth of the cutter 50 inserted into the slot 31 does not exceed half of the radial radius of the slot 31, the cutter 50 only cuts the inner wall of the return pipe 93 facing the center, and will not contact the bottom of the return pipe 93 or the outer wall away from the center, so the bottom and outer wall of the return pipe 93 remain completely closed.

[0050] like Figure 1 , Figure 4 and Figure 5 As shown, in the embodiment with a spring, the method for processing the nipple air return tube cutout of the present invention is as follows: In the initial state, the spring 40 lifts the sliding ring 30 to the upper limit position, the cutter 50 is located inside the cutter gap 32 and below the slot 31, and the cutter 50 is completely hidden.

[0051] Step S1: Place the connecting part 92 of the nipple 90 on the upper surface of the sliding ring 30, so that the air return tube 93 is inserted into the slot 31 accordingly. Since the cutter 50 is hidden below the slot 31, the operator will not come into contact with the blade 51 when placing the nipple 90.

[0052] Step S2: Press down on the nipple 90, causing the sliding ring 30 to descend along the support column 20 to its downward limit position. During the descent, the sliding ring 30 compresses the spring 40, and the cutter 50 enters the slot 31 through the inlet gap 32. The inclined non-cutting surface 52 of the cutter 50 pushes the wall of the return air pipe 93 outward without cutting it, allowing the return air pipe 93 to safely pass over the cutter 50. The operator presses down until the second bolt 80 abuts against the upper end of the strip hole 33, reaching the downward limit position; no manual judgment of the pressing depth is required.

[0053] Step S3: Pull the nipple 90 upwards. The air return tube 93 moves upwards relative to the cutter 50. The blade 51 of the cutter 50 cuts downwards on the inner wall of the air return tube 93, forming a slit 94. During the cutting process, the inner wall of the air return tube 93 is also stretched and taut. After the nipple 90 is pulled away, the spring 40 pushes the sliding ring 30 back to its upper limit position. The cutter 50 retracts into the cutting gap 32 and is lower than the slot 31. The cutter 50 is completely hidden again, and the tool returns to its initial standby state.

[0054] In the spring 40 scheme, the cutting is still completed by pulling up the nipple 90. The spring 40 does not participate in the cutting process. Its function is to automatically drive the sliding ring 30 to reset and hide the cutter 50 after the nipple 90 is pulled out, so that the tool is always in standby state and the cutter 50 is not exposed. The operator will not come into contact with the blade 51 during the entire process of placing and removing the nipple 90.

[0055] The nipple structure of the present invention can be obtained by using the above-described processing tools and methods.

[0056] like Figure 8As shown, a nipple includes a nipple body 91 and a connecting part 92. At least one air return tube 93 is provided on the lower surface of the connecting part 92 where it connects with the nipple body 91. Using the nipple air return tube cutting tool of the above scheme and the nipple air return tube cutting method of the above scheme, a vertical cut 94 is cut on the inner side of the air return tube 93 facing the center of the nipple body 91, that is, the cut 94 extends along the axial direction of the air return tube 93.

[0057] In this embodiment, three air return tubes 93 are located below the nipple, and the three air return tubes 93 are evenly distributed along the circumference of the connecting part 92. The nipple air return tube cutting tool has three cutters 50, and the inner surface of each of the three air return tubes 93 is formed with a vertical cut 94.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. 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 all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A tool for processing the vent tube of a nipple, characterized in that, include: Base and support column mounted on the base; A sliding ring is fitted onto the support column; At least one cutter is disposed at the top of the support column and protrudes to the side of the support column, the lower edge of the cutter is configured as a cutting edge, and the upper edge of the cutter is configured as an inclined non-cutting surface; The top of the sliding ring near the inner ring opening has a slot corresponding to the position of each cutter. The inner sidewall of the sliding ring has a cutter inlet gap corresponding to each slot. The cutter inlet gap extends from the bottom to the top of the inner sidewall of the sliding ring along the axial direction of the sliding ring and communicates with the inner side of the slot. The side wall of the support column is provided with a screw hole, and the sliding ring is provided with a strip hole that penetrates the ring body. After the bolt passes through the strip hole, it is installed in the screw hole. The bolt abuts against the upper end of the strip hole to limit the downward limit position of the sliding ring. When the sliding ring is at the downward limit position, the cutter is lower than the upper surface of the sliding ring and the cutting edge of the cutter extends into the slot.

2. The nipple air return tube cutting tool according to claim 1, characterized in that, The three cutters are evenly distributed along the circumference of the support column; the three slots are provided accordingly; and the three cutter inlets are provided accordingly.

3. The nipple air return tube cutting tool according to claim 1, characterized in that, The diameter of the slot is adapted to the outer diameter of the nipple air return tube, and the depth of the slot is not less than the length of the nipple air return tube.

4. The nipple air return tube cutting tool according to claim 1, characterized in that, The length of the cutter protruding towards the side of the support column is such that the cutter extends at least into the slot and does not exceed the center of the slot.

5. The nipple air return tube cutting tool according to claim 1, characterized in that, The strip-shaped hole is positioned between two adjacent slots.

6. The nipple air return tube cutting tool according to claim 1, characterized in that, It also includes a spring disposed between the sliding ring and the base, one end of the spring abutting against the lower surface of the sliding ring and the other end abutting against the base; the spring pushes the sliding ring upward along the support column, and the bolt abuts against the lower end of the strip hole to limit the upward limit position of the sliding ring.

7. The nipple air return tube cutting tool according to claim 1, characterized in that, The top surface of the support column is provided with three tool holder protrusions, which are fan-shaped and distributed along the circumference of the support column; each tool holder protrusion has an assembly groove on the same side wall, and the cutter is embedded in the assembly groove.

8. The nipple air return tube cutting tool according to claim 7, characterized in that, It also includes a locking block; the locking block is disc-shaped and has three fan-shaped notches, the three fan-shaped notches correspond to the three blade holder bosses, and the locking block and the three blade holder bosses are assembled to form a complete disc; the locking block has a through hole in the center, the support column has a screw hole in the center of the top surface, the locking block is locked to the top surface of the support column by bolts, and each cutter is clamped and fixed between the corresponding blade holder boss and the locking block.

9. A method for processing a nipple air return tube cut, using the nipple air return tube cutting tool as described in any one of claims 1 to 8, characterized in that, Includes the following steps: Step S1: Place the nipple connector on the upper surface of the sliding ring so that the nipple's air return tube is inserted into the corresponding slot. Step S2: When the sliding ring is placed at the downward limit position, during the downward movement of the nipple's air return tube relative to the cutter, the inclined upper edge of the cutter pushes the air return tube away without cutting it when it contacts the side wall of the air return tube. Step S3: Pull the nipple upwards. As the air return tube moves upwards relative to the cutter, the lower edge of the cutter makes a cut from top to bottom on the inner wall of the air return tube facing the center of the support column.

10. A pacifier, characterized in that, The device includes a nipple body and a connecting part. At least one air return tube is provided on the lower surface of the connecting part where it connects with the nipple body. The side wall of the air return tube is provided with a cut. The cut is located on the inner side of the air return tube facing the center of the nipple body. The cut is formed on the air return tube by the nipple air return tube cutting processing method as described in claim 9.

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