A sanded tip with an air-tight structure

Abstract

The utility model is suitable for the technical field of pen head, a sanding pen head with air -tight structure, including shell subassembly, the shell subassembly top inner wall is connected with connecting piece, the shell subassembly bottom position sliding connection has the support piece, the support piece bottom is connected with the push -out structure for pushing the support piece and carries out axial movement, the bottom of connecting piece is clamped with base, the base top is placed with sealing element, the inner wall of connecting piece forms has installed platform, the installed platform top fixed connection has sanding pen head, the installed platform bottom is connected with mounting, the cavity formed by mounting and base is placed with the spring of discharging, the spring of discharging one end abuts to mounting bottom surface, the other end abuts to sealing element outer wall. This device solved the problem that the traditional pen head for smearing viscous material is easy to leak, reached the purpose that the material air -tightness and one -way screwing out were realized under the cooperation of sealing element and spring.

Description

Technical Field

[0001] This utility model relates to the field of pen tip technology, and more specifically, to a frosted pen tip with an airtight structure. Background Technology

[0002] In the cosmetics industry, for materials with a certain viscosity, such as lipsticks, lip glosses, and concealers, a pen tip structure with a twist-out mechanism is often used so that the material can be gradually squeezed out of the storage cavity by rotating during use, and evenly applied.

[0003] However, while some existing screw-out pen tips can dispense materials, they still have certain drawbacks. First, viscous materials often backflow under residual pressure after dispensing. Some of this backflowed material has already come into contact with the external environment and returns to the storage chamber, contaminating the inner wall of the chamber, affecting the purity of the material, the user experience, and reducing the material's shelf life. Second, some structures lack sufficient sealing, and the pen tip is prone to leakage or dripping when stationary or carried, not only wasting material but also potentially contaminating the user's belongings. Third, some screw-out mechanisms lack effective one-way limit control, which may cause internal material to be sucked back or the structure to loosen during reverse rotation or vibration, affecting the stability and safety of use.

[0004] Therefore, based on the above-mentioned technical problems, this application provides a frosted pen tip with an airtight structure. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a frosted stone pen tip with an airtight structure that can seal and prevent material leakage.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A frosted pen tip with an airtight structure includes a housing assembly. A connector is connected to the inner wall of the top of the housing assembly. A support is slidably connected to the bottom of the housing assembly. A push-out structure for pushing the support to move axially is connected to the bottom of the support. A base is snapped into the bottom of the connector. A seal is placed on the top of the base. A mounting platform is formed on the inner wall of the connector. A frosted pen tip is fixedly connected to the top of the mounting platform. A mounting component is connected to the bottom of the mounting platform. A discharge spring is placed in the cavity formed by the mounting component and the base. One end of the discharge spring abuts against the bottom surface of the mounting component, and the other end abuts against the outer wall of the seal.

[0008] The present invention is further configured such that: the top surface of the frosted pen tip is inclined, the outer surface of the frosted pen tip is made of frosted material, a discharge hole is opened at the center of the frosted pen tip, a through hole is opened at the center of the mounting component, and the discharge hole and the through hole of the mounting component are coaxially arranged.

[0009] The present invention is further configured such that: a limiting post is provided around the through hole of the mounting component, and the limiting post is arranged in the axial direction to prevent the seal from abutting against the through hole of the mounting component and causing blockage.

[0010] The present invention is further configured such that: the ejection structure adopts a torsion component, and the torsion component achieves the ejection of the support member by rotation.

[0011] The present invention is further configured such that: the ejection structure adopts a push-button component, and the push-button component achieves the ejection of the support member by pressing.

[0012] The present invention is further configured such that: the ejection structure adopts a screw-out assembly, the screw-out assembly includes a rotating component, the rotating component is rotatably connected to the bottom of the outer shell assembly, the inner wall of the rotating component is provided with ribs, and the rotating component is also provided with a boss inside.

[0013] The present invention is further configured such that: a rotating column is connected inside the rotating component, the rotating column is threaded, the rotating column is axially grooved, the rotating column is connected to the boss by the groove, and a screw-out spring is sleeved on the outer wall of the rotating column.

[0014] The present invention is further configured such that: a fixing member is connected to the top of the rotating member, the outer wall of the fixing member is fixedly connected to the outer shell assembly, and a threaded groove is provided at the center of the fixing member, the threaded groove being adapted to the thread shape of the rotating column.

[0015] The present invention is further configured such that: the rotating column is threadedly connected to the fixing member, the top of the rotating column is provided through the fixing member, a support member is connected to the top of the rotating column, and the support member is slidably connected to the outer shell assembly.

[0016] The present invention is further configured such that: a buffer member is placed in the cavity formed by the rotating member and the fixed member, the buffer member can move axially relative to the rotating member, the buffer member is sleeved on the outer wall of the unscrewed spring, the outer wall of the buffer member is provided with a matching rib, the matching rib is adapted to the shape of the rib, and the top of the buffer member is provided with an inclined protrusion, the inclined protrusion is adapted to the shape of the bottom of the fixed member.

[0017] In summary, this application includes at least one of the following beneficial technical effects:

[0018] 1. This utility model, through the tight fit between the sealing element and the through hole of the base, and the continuous pressing action provided by the discharge spring, ensures that the through hole of the base remains closed when not in operation. This structure effectively prevents outside air from entering the cavity, avoiding material concentration due to evaporation, failure due to drying, or contamination by impurities in the air, thereby significantly improving the storage stability and service life of the material.

[0019] 2. After the material is extruded, the discharge spring immediately returns to its compressed deformation, quickly pushing the seal back to the through-hole sealing position. This process can cut off the material flow channel at the first moment, preventing material backflow due to internal residual pressure or backflow effect, ensuring a clean and efficient discharge action, and avoiding dripping and waste.

[0020] 3. The unscrewing assembly achieves unidirectional rotation through the engagement of the inclined protrusion of the buffer component and the inclined-steep surface at the bottom of the fixing component. The operator experiences smooth unscrewing during normal rotation, while attempting reverse rotation results in rigid contact between the buffer component and the fixing component, preventing reverse movement. This design effectively avoids material backflow and internal gas mixing caused by reverse rotation, and also prevents structural loosening due to misoperation or vibration, ensuring the stability and safety of the entire device. Attached Figure Description

[0021] Figure 1 This is a front view of a frosted pen tip with an airtight structure according to the present invention.

[0022] Figure 2 This is an exploded view of the unscrewing component in this utility model.

[0023] Figure 3 for Figure 1 A sectional view taken along section line AA.

[0024] Figure 4 for Figure 3 A magnified view of a portion of region B in the middle.

[0025] Figure 5 for Figure 3 A magnified view of a portion of region C.

[0026] Figure 6 This is a cross-sectional schematic diagram of the torsion component in Embodiment 2.

[0027] Figure 7 This is a cross-sectional schematic diagram of the torsion component in Embodiment 2.

[0028] Figure 8 This is a cross-sectional schematic diagram of the pressing component in Embodiment 3.

[0029] Explanation of reference numerals in the attached drawings: 1. Outer shell assembly; 11. Connector; 111. Mounting platform; 12. Base; 13. Mounting component; 131. Limiting post; 14. Sealing component; 15. Discharge spring; 16. Frosted pen tip; 161. Discharge hole; 2. Top cover; 3. Unscrewing assembly; 31. Rotating component; 311. Rib; 312. Boss; 32. Rotating post; 321. Groove; 33. Unscrewing spring; 34. Buffer component; 341. Mating rib; 342. Inclined protrusion; 35. Fixing component; 3 51. Threaded groove; 4. Support component; 5. Torsion assembly; 51. Grip component; 52. Torsion module; 521. Rotating collar; 522. Waist-shaped rotating component; 5221. Protrusion; 523. Rotating component; 5231. Rotating groove; 524. Transmission component; 5241. Protrusion; 525. Threaded rod; 54. Retaining ring; 6. Press assembly; 61. Press component; 62. Intermediate component; 63. Transmission kit; 64. Stud; 65. Waist-shaped hole transmission component; 66. Limiting spring; 67. Mating component. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

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

[0032] Example 1, please refer to Figure 1-5 The present invention provides the following technical solution:

[0033] Specifically, it refers to a frosted pen tip with an airtight structure, including a housing assembly 1, a top cover 2 snapped to the top of the housing assembly 1, and a screw-out assembly 3 rotatably connected to the bottom of the housing assembly 1. The screw-out assembly 3 is used to screw out and squeeze the material inside the housing assembly 1.

[0034] The outer casing assembly 1 is configured as a hollow cylindrical structure. The middle cavity of the outer casing assembly 1 is used to place materials, typically viscous liquids, which can be extruded through a mechanism connected to the top of the outer casing assembly 1. A connector 11 is snapped onto the inner wall of the top of the outer casing assembly 1. The top of the connector 11 is inclined, and a base 12 is snapped onto the bottom of the connector 11. A through hole is opened at the bottom of the base 12, and a sealing element 14 is placed on the top of the base 12. The diameter of the through hole at the bottom of the base 12 is smaller than the diameter of the sealing element 14, thereby achieving a seal under natural conditions. The material placed inside the outer casing assembly 1 can be extruded through the through hole at the base 12.

[0035] A mounting platform 111 is formed around the inner wall of the connector 11. A sanding pen tip 16 is fixedly connected to the top of the mounting platform 111. A mounting component 13 is connected to the bottom of the mounting platform 111. A through hole is opened at the center of the mounting component 13, and a limiting post 131 is provided around the circumference of the through hole. The limiting post 131 extends in the axial direction to limit the movement trajectory of the seal 14, so as to prevent the seal 14 from shifting laterally under the impact of the material and blocking the through hole of the mounting component 13, thereby ensuring the stability and smoothness of the material discharge.

[0036] A discharge spring 15 is placed within the cavity formed by the mounting component 13 and the base 12. One end of the discharge spring 15 abuts against the outer wall of the sealing component 14 and is naturally fitted against the base 12, while the other end abuts against the top surface of the base 12 and is always in a compressed state. The sealing component 14 is located within the inner ring of the discharge spring 15, and the two are fixed and guided by an interference fit. The discharge spring 15 not only provides a stable elastic restoring force to the sealing component 14 but also ensures that the axial movement of the sealing component 14 is controlled, preventing lateral swaying. In its natural state, the discharge spring 15 presses the sealing component 14 tightly against the through hole of the base 12, thereby preventing material leakage. When material is extruded, the discharge spring 15 can be compressed, causing the sealing component 14 to disengage from the through hole, thus completing the discharge. After discharge, it quickly resets to reseal the through hole.

[0037] The top surface of the abrasive brush tip 16 is designed with an inclined structure, and its inclination angle is consistent with that of the connector 11. The outer surface of the abrasive brush tip 16 is made of a frosted material, including: frosted stone material, fiber head material, and sintered metal head material, so as to produce uniform distribution during application. A discharge hole 161 is opened at the center of the abrasive brush tip 16. The discharge hole 161 is coaxially arranged with the central through hole of the mounting component 13 and the through hole of the base 12, and the three together form a continuous through discharge channel. When the material inside the outer shell assembly 1 moves upward under the push of the unscrewing component 3, the material first presses the sealing component 14, causing the sealing component 14 to drive the discharge spring 15 to compress and disengage from the through hole sealing opening of the base 12. Then the material is discharged sequentially through the through hole of the base 12, the central through hole of the mounting component 13, and the discharge hole 161 of the abrasive brush tip 16, and finally covers the top surface of the abrasive brush tip 16. The user can apply the abrasive brush tip 16 to the target surface to make the material evenly distributed on the target area.

[0038] The unscrewing assembly 3 includes a rotating component 31, which is rotatably connected to the bottom of the outer shell assembly 1 and can rotate freely relative to the outer shell assembly 1. The inner wall of the rotating component 31 is provided with several sets of ribs 311, and the interior of the rotating component 31 is also formed with several sets of bosses 312.

[0039] A rotating column 32 is inserted inside the rotating component 31. The rotating column 32 has a thread and an axial groove 321. The rotating column 32 is connected to the boss 312 by the groove 321. A screw-out spring 33 is sleeved on the outer wall of the rotating column 32. The screw-out spring 33 is axially oriented.

[0040] A fixing member 35 is installed on the top of the rotating component 31. The outer wall of the fixing member 35 is fixedly connected to the outer shell assembly 1, thereby forming a stable overall limiting support. A threaded groove 351 is formed at the center of the fixing member 35. The threaded groove 351 is adapted to the thread shape on the rotating column 32, so that the rotating column 32 can be threadedly connected to the fixing member 35. Furthermore, the top of the rotating column 32 passes through the fixing member 35 and extends upward. A support member 4 is fixedly connected to the top of the rotating column 32. The support member 4 forms a sliding connection with the outer shell assembly 1 and is used to support the material inside the cavity of the outer shell assembly 1.

[0041] A buffer member 34 is placed within the cavity formed by the rotating member 31 and the fixed member 35. The buffer member 34 is capable of axial movement relative to the rotating member 31. A mating rib 341 is provided on the outer wall of the buffer member 34. The shape of the mating rib 341 matches that of the rib 311, thereby restricting the radial rotation of the buffer member 34 while allowing axial movement. The buffer member 34 is fitted onto the outer wall of the unscrewed spring 33. One end of the unscrewed spring 33 abuts against the inner wall of the buffer member 34, and the other end abuts against the boss 312 of the rotating member 31. The unscrewed spring 33 provides elastic support for the vertical movement of the buffer member 34.

[0042] An inclined protrusion 342 is also formed on the top of the buffer member 34, and the inclined protrusion 342 is adapted to the bottom shape of the fixing member 35. When the operator rotates the rotating member 31, the buffer member 34 abuts against the bottom of the fixing member 35 under the elastic action of the spring 33 and abuts against the fixing member 35 through the inclined protrusion 342. When the rotating member 31 rotates in the first direction, the buffer member 34 is compressed by the spring 33 and slides down the fixing member 35 under the guidance of the inclined surface of the inclined protrusion 342, so as to achieve smooth rotation; when the rotating member 31 attempts to rotate in the opposite direction, the steep surface of the inclined protrusion 342 forms a rigid abutment with the bottom of the fixing member 35, and the buffer member 34 cannot avoid it, thereby preventing the reverse rotation.

[0043] Therefore, through the inclined protrusion 342 of the buffer 34 and the bottom of the fixing member 35 forming a slope-steep surface structure, combined with the pre-tightening effect of the unscrewing spring 33, the unscrewing assembly 3 can only be unscrewed in the first direction, which is preferably clockwise in this embodiment. This function not only provides buffer protection during rotation, but also ensures that the cavity of the outer shell assembly 1 is fully filled with material during unscrewing, preventing external gas from entering, thereby improving the reliability and sealing of use.

[0044] The working principle of the frosted pen tip with an airtight structure provided in this embodiment is as follows:

[0045] See Figure 1-5 The operator first rotates and unscrews component 3. Under the action of the one-way limiting mechanism, component 3 can only rotate clockwise, thereby driving the rotating column 32 to gradually rise. The rotating column 32 pushes upward against the support component 4, causing the material in the cavity of the outer shell component 1 to be continuously squeezed in the axial direction. As the pressure in the cavity increases, the material exerts an upward thrust on the seal 14 at the base 12. The seal 14 drives the discharge spring 15 to compress and disengage from the sealing port of the through hole of the base 12. At this time, the material enters the central through hole of the mounting component 13 through the through hole of the base 12, and then flows into the discharge hole 161 of the abrasive pen tip 16, and is evenly distributed on the inclined top surface of the abrasive pen tip 16. The user can apply the material evenly to the application area by applying it to the target surface. As the unscrewing operation stops and the material is released, the pressure in the cavity gradually decreases. The seal 14 quickly returns to its original position under the elastic restoring force of the discharge spring 15 and re-presses the through hole of the base 12, thereby forming a seal again and preventing the material from flowing out or the gas from flowing back in. At the same time, the buffer 34 is reset under the action of the unscrewing spring 33, so that the unscrewing assembly 3 remains in its initial standby state.

[0046] Example 2, please refer to Figure 6 , Figure 7 When the pushing structure uses the torsion assembly 5, the torsion assembly 5 includes a gripper 51 and a torsion module 52. The torsion module 52 includes a rotating collar 521, a waist-shaped rotating member 522, a rotating member 523, a transmission member 524, and a threaded rod 525. The transmission member 524 is snap-fitted to the gripper 51, and the gripper 51 is rotatably connected to the outer wall of the outer shell assembly 1. The rotation of the gripper 51 can drive the transmission member 524 to rotate. The transmission member 524 is a hollow cylindrical shape, with a protrusion 5245 on the upper half of the transmission member 524 and a wave-shaped top. The rotating member 523 is sleeved on the outer side of the transmission member 524, and several sets of rotating grooves 5235 are opened on the inner wall of the rotating member 523. The transmission member 524 and the rotating member 523 are snap-fitted together through the protrusion 5241 and the rotating grooves 5231. A waist-shaped rotating component 522 is connected to the top of the transmission component 524. A protrusion 5221 is provided on the outer wall of the waist-shaped rotating component 522. The bottom surface of the protrusion 5221 is inclined and matches the wavy top surface shape of the transmission component 524, allowing them to be interlocked. Simultaneously, the outer wall of the waist-shaped rotating component 522 is fixed to the inner wall of the rotating component 523. A rotating collar 521 is connected to the top of the rotating component 523. The outer wall of the rotating collar 521 is fixedly connected to the housing 5, and a threaded groove is formed on the inner wall of the rotating collar 521. The top surface of the rotating component 523 abuts against the bottom surface of the rotating collar 521, and the bottom surface of the rotating component 523 abuts against the top surface of the fixing ring 54. Therefore, the rotating component 523 cannot achieve vertical displacement.

[0047] A threaded rod 525 is disposed between the rotating collar 521, the waist-shaped rotating component 522, the rotating component 523, and the transmission component 524. The waist-shaped rotating component 522 has a through-hole in its center, and this hole matches the shape of the threaded rod 525, allowing for a slidable connection between the threaded rod 525 and the waist-shaped rotating component 522. The threaded rod 525 has an overall waist-shaped structure, with threaded grooves at both ends of its arc-shaped portion. These threaded grooves match the corresponding threaded grooves inside the rotating collar 525, achieving a threaded connection between the two.

[0048] During operation, when the user grips component 51, the gripping component 51 drives the transmission component 524 to rotate, which in turn drives the waist-shaped rotating component 522 to rotate through the rotating component 523. The waist-shaped rotating component 522 drives the threaded rod 525 to rotate through its internal waist-shaped hole. Since there is a threaded engagement between the threaded rod 525 and the fixed rotating ring 525, the threaded rod 525 will gradually move upward along the axial direction during rotation, thereby driving the support component 4 connected to it to push out, realizing the gradual ejection of the material. This allows the material to be squeezed upward from the hollow wall of the outer shell component 1. Subsequently, the material is discharged sequentially through the through hole of the base 12, the central through hole of the mounting component 13, and the discharge hole 161 of the abrasive pen tip 16, finally covering the top surface of the abrasive pen tip 16.

[0049] Example 3, please refer to Figure 8 When the push structure adopts the push assembly 6, the push assembly 6 includes a pusher 61, an intermediate part 62, a transmission kit 63, a stud 64, a waist-shaped hole transmission part 65, a limit spring 66, and a mating part 67.

[0050] The pusher 61 is rotatably connected to the intermediate part 62. The outer wall of the intermediate part 62 is engaged with the transmission kit 63 by an inclined protrusion. The bottom surface of the transmission kit 63 abuts against the protrusion of the outer shell assembly 1, and the top of the transmission kit 63 abuts against the bottom of the mating part 67. Therefore, the transmission kit 63 can only rotate circumferentially and cannot move axially.

[0051] The intermediate component 62 has a toothed surface at its top, which meshes with the waist-shaped hole transmission component 65. The outer wall of the waist-shaped hole transmission component 65 is engaged with the transmission kit 63. The mating component 67 is fixedly connected to the outer shell assembly 1. When the actuating component 61 is pressed, the intermediate component 62 moves axially synchronously. Due to its engagement with the inclined protrusion of the transmission kit 63, the intermediate component 62 moves axially downward while simultaneously forcing the transmission kit 63 to rotate along the inclined surface, thereby causing itself to rotate circumferentially. Specifically, the intermediate component 62 both extends axially and rotates circumferentially in conjunction with the transmission kit 63.

[0052] During this process, the waist-shaped hole transmission component 65, due to its meshing with the tooth surface of the intermediate component 62, will also generate a combined motion of axial displacement and circumferential rotation under the combined action of the axial movement and rotation of the intermediate component 62. At the same time, the transmission kit 63 provides circumferential rotational force to the waist-shaped hole transmission component 65. Therefore, the waist-shaped hole transmission component 65 rotates synchronously with the intermediate component 62 and the rotation kit 63, and is pushed along with the axial movement of the intermediate component 62.

[0053] The waist-shaped hole transmission component 65 is provided with a waist-shaped hole structure, and one end of the stud 64 passes through the waist-shaped hole. Under the guidance of the waist-shaped hole, the stud 64 is gradually rotated and screwed out under the constraint of the mating part 67. As the stud 64 continues to rotate and rise, the support part 4 connected to it is gradually lifted, thereby pushing the material it carries upward.

[0054] As the support 4 continues to rise, the material is gradually delivered to the upper end of the hollow cavity of the outer shell assembly 1, and passes through the through hole of the base 12, the central through hole of the mounting part 13, and the discharge hole 161 of the abrasive pen tip 16 in sequence, finally evenly covering the top surface of the abrasive pen tip 16, so as to achieve stable material ejection.

[0055] Furthermore, since the limiting spring 66 is located between the mating part 67 and the waist-shaped hole transmission part 65, when the external force is released, the limiting spring 66 applies a reverse force to the pusher 61, the intermediate part 62 and the waist-shaped hole transmission part 65, causing them to reset axially and drive their rotating parts back to the initial state, thereby ensuring the cyclic operation of the device.

[0056] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical 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 utility model according to the specific circumstances.

[0057] It should be understood that the terms "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and are 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. Therefore, they should not be construed as limitations on this utility model.

[0058] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A frosted pen tip with an airtight structure, characterized in that: The device includes a housing assembly (1), a connector (11) connected to the inner wall of the top of the housing assembly (1), a support (4) slidably connected to the bottom of the housing assembly (1), a push-out structure for pushing the support (4) to move axially connected to the bottom of the support (4), a base (12) snapped into the bottom of the connector (11), a seal (14) placed on the top of the base (12), an mounting platform (111) formed on the inner wall of the connector (11), a sanding pen tip (16) fixedly connected to the top of the mounting platform (111), an installation component (13) connected to the bottom of the mounting platform (111), and a discharge spring (15) placed in the cavity formed by the installation component (13) and the base (12), with one end of the discharge spring (15) abutting the bottom surface of the installation component (13) and the other end abutting the outer wall of the seal (14).

2. The frosted pen tip with an airtight structure according to claim 1, characterized in that: The top surface of the frosted pen tip (16) is inclined, the outer surface of the frosted pen tip (16) is made of frosted material, the center of the frosted pen tip (16) is provided with a discharge hole (161), the center of the mounting part (13) is provided with a through hole, and the discharge hole (161) and the through hole of the mounting part (13) are coaxially arranged.

3. The frosted pen tip with an airtight structure according to claim 2, characterized in that: The mounting component (13) is provided with a limiting post (131) around the through hole. The limiting post (131) is arranged in the axial direction to prevent the seal (14) from abutting against the through hole of the mounting component (13) and causing blockage.

4. The frosted pen tip with an airtight structure according to claim 1, characterized in that: The ejection structure employs a twisting component (5), which ejects the support member (4) by rotating.

5. A frosted pen tip with an airtight structure according to claim 1, characterized in that: The ejection structure employs a push-button assembly (6), which ejects the support member (4) by pressing.

6. The frosted pen tip with an airtight structure according to claim 1, characterized in that: The ejection structure adopts a screw-out assembly (3), which includes a rotating part (31). The rotating part (31) is rotatably connected to the bottom of the outer shell assembly (1). The inner wall of the rotating part (31) is provided with ribs (311), and the rotating part (31) is also provided with a boss (312).

7. A frosted pen tip with an airtight structure according to claim 6, characterized in that: The rotating component (31) is internally connected to a rotating column (32), which is threaded and has an axial groove (321). The rotating column (32) is connected to the boss (312) through the groove (321). The outer wall of the rotating column (32) is fitted with a screw-out spring (33).

8. A frosted pen tip with an airtight structure according to claim 7, characterized in that: The top of the rotating component (31) is connected to a fixing component (35). The outer wall of the fixing component (35) is fixedly connected to the outer shell assembly (1). A threaded groove (351) is provided at the center of the fixing component (35). The threaded groove (351) is adapted to the thread shape of the rotating column (32).

9. A frosted pen tip with an airtight structure according to claim 7, characterized in that: The rotating column (32) is threadedly connected to the fixing member (35), the top of the rotating column (32) is provided through the fixing member (35), and the top of the rotating column (32) is connected to the support member (4), which is slidably connected to the outer shell assembly (1).

10. A frosted pen tip with an airtight structure according to claim 7, characterized in that: A buffer (34) is placed in the cavity formed by the rotating member (31) and the fixed member (35). The buffer (34) can move axially relative to the rotating member (31). The buffer (34) is sleeved on the outer wall of the unscrewed spring (33). The outer wall of the buffer (34) is provided with a mating rib (341). The mating rib (341) is adapted to the shape of the rib (311). The top of the buffer (34) is provided with an inclined protrusion (342). The inclined protrusion (342) is adapted to the shape of the bottom of the fixed member (35).

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