An applicator for a porous material refill

Abstract

The utility model discloses a kind of smearing tools of porous material refill, including hollow pen barrel (5), the roll package core (6) in the pen barrel (5) of the described pen barrel (5) is equipped with, it is characterized by: the opening end of the pen barrel (5) is equipped with porous material refill, and the porous material refill has head (1) and the handle portion (2) connected therewith;The head (1) and handle portion (2) are both porous quality component and are constituted.This utility model has the advantages of fluent smearing, ink supply continuity, color development uniformity, tough and durable.

Description

Technical Field

[0001] This utility model relates to the field of porous materials, and more particularly to a porous material pen refill applicator. Background Technology

[0002] Writing instruments such as paint markers and underline markers have nibs that can draw wider lines due to their wider lead, and are widely used because of their excellent visibility and ease of use. In the case of nibs for writing instruments such as line markers, writing is typically achieved by applying capillary action to a porous component, thereby directing ink supplied from the rod body (which is the main body of the writing instrument) to the nib. This porous component is typically a component made by aggregating synthetic resin fibers into a rod shape, or a sintered polymer body. Porous plastic structures, including writing pen nibs, are usually manufactured from sintered thermoplastic material particles.

[0003] Prior art, such as publication number CN112888576B, discloses a writing instrument whose nib is a nib with a refill containing a masking material, the refill having a brightness of 80 or higher in the L*a*b* (CIE LAB) color system. This writing instrument includes: a holder having a visible portion, for example, capable of visually confirming the writing direction; and a nib with the aforementioned structure mounted on the holder. Similarly, US20220041006A1 discloses a nib and a related writing instrument, the nib having a nib housing including a flexible upper writing portion and a lower portion communicating with the flexible upper writing portion. The lower portion of the nib housing is configured to deliver ink to the flexible upper writing portion, and the flexible upper writing portion is configured to deliver ink to the writing surface. The flexible upper writing portion of the nib housing includes a flat, chisel-shaped tip at the upper end of the flexible upper writing portion. When a force of less than about 0.1 lbs is applied, the nib can effectively deliver ink to the writing surface.

[0004] Publication No. JP7420905B2 also discloses a writing instrument with a pen core porosity of 30-70%. The ink composition for the writing instrument contains coloring resin particles with an average particle size of 1-10 μm. The ink viscosity is 8-20 mPa·s·A, and the particle size distribution (Mv / Mn) of the coloring resin particles is 1-3. Publication No. US3942903A discloses an integral porous thermoplastic writing pen tip, which provides an improved writing pen tip that offers a porous thermoplastic product with uniform pore size. All of the above prior art are single-material technologies. Summary of the Invention

[0005] The purpose of this invention is to provide a tool for applying porous material pen refills that offers smooth application, continuous ink supply, uniform color development, and durability, in contrast to existing technologies.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a tool for applying porous material pen refills, comprising a hollow pen barrel and a rolled core disposed inside the pen barrel, wherein: a porous material pen refill is installed at the open end of the pen barrel, and the porous material pen refill has a head and a handle connected thereto; the head and handle are both composed of porous materials.

[0007] There is a connecting surface between the head and the handle; the side of the head or the side of the handle has a groove; the bottom of the groove is flush with a part of the side of the handle.

[0008] The aforementioned porous material pen refill is U-shaped, and the handle of the U-shaped porous material pen refill is connected to the open end of the pen barrel via a positioning plug; the plug has a fixing post that can cooperate with the open end of the pen barrel; the fixing post has a through hole that can pass through the handle of the U-shaped porous material pen refill; the plug has a transparent sheet that can be wrapped by the U-shaped porous material pen refill; the edge of the transparent sheet has a fixing groove for fixing the U-shaped porous material pen refill.

[0009] The porous components of the head and the handle have different average pore diameters; the porous component of the head has a first average pore diameter, and the porous component of the handle has a second average pore diameter; the first average pore diameter is less than or equal to the second average pore diameter; the ratio of the first average pore diameter to the second average pore diameter is 1:5 to 1:50. The porous components of the head and the handle have different average particle sizes; the porous component of the head has a first average particle size, and the porous component of the handle has a second average particle size; the first average particle size is smaller than the second average particle size; the ratio of the first average particle size to the second average particle size is 1:2 to 1:60; and there is a connecting surface between the head and the handle.

[0010] The aforementioned porous components of the head and the handle have different porosities; the porous component of the head has a first porosity, and the porous component of the handle has a second porosity; the first porosity is less than the second porosity; the ratio of the first porosity to the second porosity is 1:1.1 to 1:40.

[0011] The aforementioned porous material pen refill has a head made of a porous component and a handle connected thereto; the aforementioned porous component has at least one connecting surface; at least a portion of the aforementioned head is a different color from the aforementioned handle or the rest of the head.

[0012] The two sides of the aforementioned interface have different porosities; the two sides of the aforementioned interface have different average particle sizes.

[0013] This utility model also provides a tool for applying porous material pen refills, comprising a hollow pen barrel and a rolled core disposed within the pen barrel, wherein: a porous material pen refill is installed at the open end of the pen barrel, and the porous material pen refill has a head and a connected handle, both of which are composed of porous components; the porous components of the head and the handle have different average pore diameters; the porous component of the head has a first average pore diameter, and the porous component of the handle has a second average pore diameter; the first average pore diameter is smaller than the second average pore diameter; the porous components of the head and the handle are made of the same specification of granular material; the difference between the average particle size of the head and the average particle size of the handle is less than 20%.

[0014] Because this invention uses porous components for both the head and the handle—the head being the part near the writing tip, and the handle being the part that connects to the pen tube and draws ink—this invention offers advantages such as smooth application, continuous ink supply, uniform color development, and durability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model; Figure 2 This is a schematic diagram of the structure of Embodiment 2 of this utility model; Figure 3 This is a schematic diagram of the cross-sectional structure of the pen refill in Embodiment 3 of this utility model; Figure 4 This is a schematic diagram of the cross-sectional structure of the pen refill in Embodiment 1 of this utility model; Figure 5 This is a schematic diagram of the main structure of the pen refill in Embodiment 1 of this utility model; Figure 6 This is a schematic diagram of the cross-sectional structure of the pen refill in Embodiment 2 of this utility model; Figure 7 This is a schematic diagram of the cross-sectional structure of the pen refill in Embodiment 2 of this utility model; Figure 8 This is a schematic diagram of the cross-sectional structure of the pen refill in Embodiment 3 of this utility model; Figure 9 This is an enlarged schematic diagram of part of the structure of Embodiment 3 of this utility model; Figure 10 This is a schematic diagram of the main structure of the pen refill in Embodiment 4 of this utility model; Figure 11 This is a schematic diagram of the cross-sectional structure of the pen refill in Embodiment 4 of this utility model; Figure 12 This is a schematic diagram of the cross-sectional structure of the pen refill in Embodiment 5 of this utility model. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying embodiments.

[0017] The following are the symbols and their meanings: 1. Head; 2. Handle; 3. Connecting surface; 4. Groove; 5. Pen barrel; 6. Core wrapping; 7. Positioning plug; 71. Fixing plug; 71. Through hole; 71a; 72. Transparent sheet; 72a. Fixing groove; 73. Transparent window.

[0018] Example 1: Refer to Figure 1 , Figure 4 , Figure 5 A tool for applying a porous material pen refill includes a hollow pen barrel 5 and a rolled core 6 disposed within the pen barrel 5. The pen barrel 5 has a porous material pen refill mounted at its open end, and the pen refill has a head 1 and a connected handle 2. Both the head 1 and the handle 2 are composed of porous materials. One or two connecting surfaces (3) are located between the head (1) and the handle (2). The connecting surfaces (3) are approximately perpendicular to the axial direction of the porous material pen refill. Of course, those skilled in the art should understand that any deviations in perpendicularity due to manufacturing processes should still be considered perpendicular, for example, 90 degrees ± 10 degrees.

[0019] There is a connecting surface 3 between the head 1 and the handle 2; the side of the head 1 or the side of the handle 2 has a groove 4; the bottom of the groove 4 is flush with part of the side of the handle 2.

[0020] The porous components of the head 1 and the handle 2 have different average pore diameters; the porous component of the head 1 has a first average pore diameter, and the porous component of the handle 2 has a second average pore diameter; the first average pore diameter is less than or equal to the second average pore diameter; the ratio of the first average pore diameter to the second average pore diameter is 1:5 to 1:50. The porous components of the head 1 and the handle 2 have different average particle sizes; the porous component of the head 1 has a first average particle size, and the porous component of the handle 2 has a second average particle size; the first average particle size is smaller than the second average particle size; the ratio of the first average particle size to the second average particle size is 1:2 to 1:60; there is a connecting surface 3 between the head 1 and the handle 2.

[0021] The porous components of the head 1 and the handle 2 have different porosities; the porous component of the head 1 has a first porosity and the porous component of the handle 2 has a second porosity; the first porosity is less than the second porosity; the ratio of the first porosity to the second porosity is 1:1.1 to 1:40.

[0022] The porous material pen refill has a head 1 and a handle 2 connected thereto, which are made of porous material components; the porous material components have at least one connecting surface 3; at least a portion of the head 1 is a different color from the handle 2 or the rest of the head 1.

[0023] The two sides of the interface have different porosities; the two sides of the interface have different average particle sizes.

[0024] A tool for applying a porous material pen refill includes a hollow pen barrel 5 and a rolled core 6 disposed within the pen barrel 5. The pen barrel 5 has an open end fitted with a porous material pen refill, which has a head 1 and a connected handle 2. Both the head 1 and the handle 2 are composed of porous components. The porous components of the head 1 and the handle 2 have different average pore diameters. The porous component of the head 1 has a first average pore diameter, and the porous component of the handle 2 has a second average pore diameter. The first average pore diameter is smaller than the second average pore diameter. The porous components of the head 1 and the handle 2 are made of the same specification of granular material. The difference between the average particle size of the head 1 and the average particle size of the handle 2 is less than 20%.

[0025] A porous material pen refill includes a head 1 and a connected handle 2, wherein both the head 1 and the handle 2 are made of porous materials. The head 1 refers to the portion near the writing end, while the handle 2 is the portion connected to the pen tube and draws ink. An application tool made of this porous material pen refill is also provided, with at least a portion of the handle 2 inserted into the pen barrel. The pen barrel is hollow and can store ink or cosmetic liquid. The design can be referenced in US20220041006A1. An optimized solution is to accommodate a sponge-based liquid storage device within the pen barrel. All technical solutions of this utility model involve two sections of material.

[0026] The porous components of the head 1 and the handle 2 have different average pore diameters; Preferably, the porous component of the head 1 has a first average pore diameter, and the porous component of the handle 2 has a second average pore diameter; the first average pore diameter is less than or equal to the second average pore diameter. Preferably, the ratio of the first average pore size to the second average pore size is 1:5 to 1:50; more preferably, the ratio of the first average pore size to the second average pore size further includes: 1:6, 1:7, 1:8, 1:9, 1:10, 1:11, 1:12, 1:13, 1:14, 1:15, 1:16, 1:17, 1:18, 1:19, 1:20, 1:21, and 1:22. 1:23, 1:24, 1:25, 1:26, 1:27, 1:28, 1:29, 1:30, 1:31, 1:32, 1:33, 1:34, 1:35, 1:36, 1:37, 1:38, 1:39, 1:40, 1:41, 1:42, 1:43, 1:44, 1:45, 1:46, 1:47, 1:48, 1:49.

[0027] Preferably, the ratio of the first average aperture to the second average aperture is 1:1 to 1:4.999. Preferably, the ratio of the first average aperture to the second average aperture also includes: 1:1.2, 1:1.3, 1:1.4, 1:1.5, 1:1.6, 1:1.7, 1:1.8, 1:1.9, 1:2, 1:2.1, 1:2.2, 1:2.3, 1:2.4, 1:2.5, 1:2.6, 1:2.7, 1:2.8, 1:2.9, 1:3, 1:3.1, 1:3.2, 1:3.3, 1:3.4, 1:3.5, 1:3.6, 1:3.7, 1:3.8, 1:3.9, 1:4, 1:4.1, 1:4.2, 1:4.3, 1:4.4, 1:4.5, 1:4.6, 1:4.7, 1:4.8, and 1:4.9.

[0028] Preferably, the average pore size of the porous component of the head 1 is from 1µm to 300µm; the average pore size of the porous component of the handle 2 is from 5µm to 300µm. More preferably, the average pore size of the porous component of the head 1 and the average pore size of the porous component of the handle 2 are 5µm, 10µm, 15µm, 20µm, 25µm, 30µm, 35µm, 40µm, 45µm, 50µm, 55µm, 60µm, 65µm, 70µm, 75µm, 80µm, 85µm, 90µm, 95µm, 100µm, 105µm, 110µm, 115µm, 120µm, 125µm, 130µm, 135µm, 140µm, 145µm, etc. The average pore size of the porous component in head 1 can be 2µm, 3µm, or 4µm. The statistical method for calculating the average pore size is micropore size statistics, a conventional measurement method, and will not be elaborated further.

[0029] Porous material pen refills with different properties are made from sintered porous polymer particles through a sintering process. The pen refills are formed by sintering in a single heating process. The pen refills provide a comfortable writing experience and good writing performance. In a typical pen refill, the handle 2 and the head 1 are composed of the same material properties, such as pore size, porosity, flow rate, and capillary force. In the embodiments of this invention, two or more types of performance materials with different properties, having lower and higher pore sizes, are used in a single pen refill; for example, the pore size of the handle is larger than that of the head. The porous components of the head 1 and the handle 2 have different average particle sizes. Preferably, the porous component of the head 1 has a first average particle size, and the porous component of the handle 2 has a second average particle size; the first average particle size is less than or equal to the second average particle size. Preferably, the ratio of the first average particle size to the second average particle size is 1:2 to 1:60; more preferably, the ratio of the first average particle size to the second average particle size further includes: 1:3, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, 1:10, 1:11, 1:12, 1:13, 1:14, 1:15, 1:16, 1:17, 1:18, 1:19, 1:20, 1:21, 1:22, 1:23, 1:24, 1:25, 1:2 6, 1:27, 1:28, 1:29, 1:30, 1:31, 1:32, 1:33, 1:34, 1:35, 1:36, 1:37, 1:38, 1:39, 1:40, 1:41, 1:42, 1:43, 1:44, 1:45, 1:46, 1:47, 1:48, 1:49, 1:50, 1:51, 1:52, 1:53, 1:54, 1:55, 1:56, 1:57, 1:58, 1:59.

[0030] Preferably, the ratio of the first average particle size to the second average particle size is 1:1 to 1:1.999. More preferably, the ratio of the first average particle size to the second average particle size further includes: 1:15, 1:20, 1:25, 1:30, 1:35, 1:40, 1:45, 1:50, 1:55, 1:60, 1:65, 1:70, 1:75, 1:80, 1:85, 1:90, and 1:95.

[0031] Preferably, the average particle size of the porous component in the head 1 is from 3µm to 900µm; the average particle size of the porous component in the handle 2 is from 6µm to 990µm; more preferably, the average particle size of the porous component in the head 1 and the average particle size of the porous component in the handle 2 further include: 7µm, 8µm, 9µm, 10µm, 11µm, 12µm, 13µm, 14µm, 15µm, 16µm, 17µm, 18µm, 19µm, 20µm, 25µm, 30µm, 35µm, 40µm, 45µm, 50µm, 55µm, 60µm. 65µm, 70µm, 75µm, 80µm, 85µm, 90µm, 95µm, 100µm, 105µm, 110µm, 115µm, 120µm, 125µm, 130µm, 135µm, 140µm, 145µm, 150µm , 160µm, 170µm, 180µm, 190µm, 200µm, 210µm, 220µm, 230µm, 240µm, 250µm, 260µm, 270µm, 280µm, 290µm, 300µm, 310µm, 320 µm, 330µm, 340µm, 350µm, 360µm, 370µm, 380µm, 390µm, 400µm, 410µm, 420µm, 430µm, 440µm, 450µm, 460µm, 470µm, 480µm, 490µm, 500µm, 510µm, 520µm, 530µm, 540µm, 550µm, 560µm, 570µm, 580µm, 590µm, 600µm, 610µm, 620µm, 630µm, 640µm, 650µ m, 660µm, 670µm, 680µm, 690µm, 700µm, 710µm, 720µm, 730µm, 740µm, 750µm, 760µm, 770µm, 780µm, 790µm, 800µm, 810µm, 82 0µm, 830µm, 840µm, 850µm, 860µm, 870µm, 880µm, 890µm, 900µm, 910µm, 920µm, 930µm, 940µm, 950µm, 960µm, 970µm, 980µm. The average particle diameter of the porous member of the head 1 may also be 4µm, 5µm, or 6µm.

[0032] Preferably, the particles in the head 1 and the particles in the handle 2 have different particle size distributions. The handle 2 of the pen refill needs to have a high flow rate and low capillary force, which allows liquid to be drawn from the reservoir to the head 1 of the pen refill. The head 1 of the pen refill is designed to have a lower liquid flow rate but a higher capillary force. This design aims to smoothly draw liquid from the handle 2 to the writing surface, providing a comfortable writing experience and good writing results. This pen refill design allows capillary force to move liquid from the reservoir to the handle 2, through the handle 2 to the head 1, and then to the writing surface at the end of the head 1. The porous components of the head 1 and the handle 2 have different porosities. Preferably, the porous component of the head 1 has a first porosity, and the porous component of the handle 2 has a second porosity; the first porosity is less than or equal to the second porosity. Preferably, the ratio of the first porosity to the second porosity is 1:1.1 to 1:40; more preferably, the ratio of the first porosity to the second porosity also includes: 1:1.11, 1:1.12, 1:1.13, 1:1.14, 1:1.15, 1:1.16, 1:1.17, 1:1.18, 1:1.19, 1:1.20, 1:1.21, and 1:1. 22, 1:1.23, 1:1.24, 1:1.25, 1:1.26, 1:1.27, 1:1.28, 1:1.29, 1:1.30, 1:1.31, 1:1.32, 1:1.33, 1:1.34, 1:1.35, 1:1.36, 1:1.37, 1:1.38, 1:1.39, 1:1.40, 1:1.41 1:1.42, 1:1.43, 1:1.44, 1:1.45, 1:1.46, 1:1.47, 1:1.48, 1:1.49, 1:1.5, 1:1.6, 1:1.7, 1:1.8, 1:1.9, 1:2, 1:3, 1:4, 1:5, 1:6, 1:7, 1:8, 1:9, 1:10, 1:11, 1:12 1:13, 1:14, 1:15, 1:16, 1:17, 1:18, 1:19, 1:20, 1:21, 1:22, 1:23, 1:24, 1:25, 1:26, 1:27, 1:28, 1:29, 1:30, 1:31, 1:32, 1:33, 1:34, 1:35, 1:36, 1:37, 1:38, 1:39.

[0033] Preferably, the ratio of the first porosity to the second porosity is 1:1 to 1:1.109; Preferably, the porosity of the porous component of the head 1 is 2.5% to 90%; the porosity of the porous component of the handle 2 is 5% to 78%; as a further preferred embodiment, the porosity of the porous component of the head 1 and the porous component of the handle 2 also includes: 2.5%, 2.6%, 2.7%, 2.8%, 2.9%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 12%, 14%, 16%, 18%, 20%, 22%, 24%, 26%, 28%, 30%, 32%, 34%, 36%, 38%, 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58%, 60%, 62%, 64%, 66%, 68%, 70%, 72%, 74%, 76%, 78%, 80%, 82%, 84%, 86%, 88%, 89%.

[0034] Preferably, the head 1 and the handle 2 have different stiffnesses; Preferably, the head 1 and the handle 2 are different colors; Preferably, the porous components of the head 1 and the handle 2 have different capillary forces, with the capillary force of the head 1 being greater than that of the handle 2. The handle 2 of the pen refill needs to have a high flow rate and low capillary force, which allows liquid to be drawn from the reservoir to the head 1 of the pen refill. The head 1 of the pen refill is designed to have a lower liquid flow rate but a higher capillary force. This design aims to smoothly draw liquid from the handle to the writing surface, providing a comfortable writing experience and good writing results. This pen refill design allows capillary force to move liquid from the pen's reservoir to the handle 2, through the handle 2 to the head 1, allowing the head 1 to contact the writing surface.

[0035] A porous material pen refill, which is composed of a porous component. The porous component has at least one connecting surface 3; Preferably, the two sides of the interface have different porosities; Preferably, the two sides of the interface have different average particle sizes; Preferably, the two sides of the connecting surface have different average pore sizes and / or capillary forces; Preferably, in the n segments of the pen refill body, the i-th segment near the head 1 has a different porosity compared to the j-th segment near the handle 2; and / or, They have different average particle sizes; and / or, They have different average apertures; and / or, Have different capillary forces; where n is a natural number less than 100, i < n and j < n. The specific measurement method is exemplified as follows. Divide the pen core body into n equal segments along the ink flow direction. For example, n = 5. Among them, the first segment contains the writing surface contact end of the pen tip 1, and so on, and the fifth segment contains the end of the handle. Under this definition, compare the parameters of the second segment (i.e., i = 2) and the fourth segment (i.e., j = 4), such as average pore size, average particle size, porosity, etc., and measure and judge whether they are the same or different.

[0036] A porous material pen core, which is made of a porous body formed by sintering plastic powder. The plastic includes polyolefin, polyamide, polyester, rigid polyurethane, polyacrylonitrile, polycarbonate, polyvinyl chloride, polymethyl methacrylate, polyvinylidene fluoride, polytetrafluoroethylene, polyethersulfone, polystyrene, polyetherimide, polyetheretherketone or polysulfone and their combinations and / or their copolymers; Preferably, the plastic powders of the porous body forming the pen tip 1 and the plastic powders of the porous body forming the handle 2 have different particle size distributions. The particle size distribution is measured by Mv / Mn.

[0037] A writing tool made of a porous material pen core. That is, a pen made of a porous material containing the technical solution of the present invention.

[0038] In the present invention, the porosity is calculated as follows: First, immerse a pen core or a pen core segment with a known mass and apparent volume (for example, separate the pen core into the pen tip and the handle) in water. After the water has fully penetrated, measure the mass in the state after taking it out of the water. From the measured mass, derive the volume of water immersed in the pen core. Consider the volume of this water to be the same as the pore volume of the pen core, and calculate the porosity by the following formula A.

[0039] Porosity (unit: %) = (volume of water) / (apparent volume of pen core) × 100 (Formula A) In the present invention, "average particle size" refers to the average value of the diameters of particles measured by an electron microscope, which is the average value of the particle sizes measured for 20 particles projected into the image of the electron microscope. When the particles are non-circular, add the lengths of the longest and shortest line segments connecting any two points on the contour forming the pores and divide by 2, and set the obtained value as the particle size of the particle.

[0040] The present invention selects an axe-shaped pen core, a U-shaped pen core, and a conical pen core as examples for further illustration. This embodiment takes the axe-shaped pen core as an example. In Figure 5 the connecting surface 3 is exactly located at the connecting part between the pen tip 1 and the handle 2.

[0041] Example 2: Refer to Figure 2 、 Figure 8 、 Figure 9 This embodiment is based on the previous embodiment, with a tapered pen tip.

[0042] Example 3: Refer to Figure 3 , Figure 6 , Figure 7 Based on the aforementioned embodiments, this embodiment uses a U-shaped pen refill. Figure 7 In the middle, the connecting surface 3 is located near the part where the cross-sectional areas of the two handles 2 and the head 1 are converted. The porous material pen refill is U-shaped, and the handle 2 of the U-shaped porous material pen refill is connected to the open end of the pen barrel 5 via a positioning plug 7; the plug 7 has a fixing plug 71 that can cooperate with the open end of the pen barrel 5; the fixing plug 71 has a through hole 71a through which the handle 2 of the U-shaped porous material pen refill can pass; the plug 7 has a transparent sheet 72 that can be wrapped by the U-shaped porous material pen refill; the edge of the transparent sheet 72 has a fixing groove 72a for fixing the U-shaped porous material pen refill.

[0043] Through comparative experiments, the present invention, with its smaller particle size, pore size, and porosity at the tip, demonstrated superior abrasion resistance under the same ink supply (water absorption) conditions. The test method involved installing the pen refill on a uniform pen barrel, measuring the initial thickness (Xa) of the writing tip, then inserting it into a writing machine, setting a writing distance of 200m, and starting the writing machine. The thickness (Xb) of the writing tip was then measured again. The wear degree of the pen tip after writing 200m was then (Xa - Xb). The wear degree of the tested embodiment of this invention ranged from 0.0647mm to 0.1997mm, with an average of 0.1148mm; while the average wear degree of the prior art was 0.1731mm. All comparative experiments were conducted under the same conditions, structure, and method, which will not be elaborated upon further below.

[0044] To compare water absorption performance, the pen tip can be placed vertically in water (dyed with color for easy inspection). When the pen tip 1 is placed in water, with the water level submerged 3mm from the end of the handle 2, water will be drawn from the handle end (handle 2) to the writing end (pen tip 1). The absorption time is recorded. The test embodiment of this utility model ranges from 5.44s to 10.91s, with an average of 7.26s; while the average of the prior art is 7.99s.

[0045] A preferred embodiment of this plot shows the product test results as follows (Table 1):

[0046] Hardness Comparison: A simple testing method is used. The pen refill sample from the example is placed in a fixture (two hard plates), with approximately half of the pen tip 1 exposed. In the longitudinal direction (along the pen tip 1 to the handle 2 and parallel to the axis of the handle 2), a displacement distance (0.81 mm) is applied to the pressure block, and the hardness (N) is recorded. The testing method of this utility model ranges from 11.04 N to 13.85 N, with an average of 11.978 N; the average value of existing technologies is 9.938 N.

[0047] Stiffness range: A simple testing method is used. The pen refill sample from the example is placed in a fixture (two hard plates), with approximately half of the pen tip 1 exposed. In the transverse direction (perpendicular to the axis of the handle 2 and perpendicular to the pen tip plane), a pressing displacement distance (0.20 mm) is set on the cutting plate. Pressing is initiated, and then the pen tip is removed. The bending angle (stiffness) is measured using a microscope. The testing technology of this utility model ranges from 0.42° to 1.56°, with an average of 1.04°; the average of existing technologies is 4.39°.

[0048] In summary, the present invention has advantages over existing technologies in terms of pen tip hardness, rigidity, and strength because the pen tip has smaller porosity, smaller pore size, and smaller particle size.

[0049] Example 4: Refer to Figure 10 , Figure 11 The head 1 has at least a portion that is a different color from the handle 2 or the rest of the head 1. This means that during the pen refill manufacturing process, color is added to small-particle-size plastic powder raw materials and sintered into a porous pen refill. This uses different colors to indicate the location of the fine-particle plastic powder, allowing the user to distinguish whether the fine-particle plastic has been worn. It also distinguishes this invention from products using other technologies. Of course, larger-particle-size plastic powder raw materials can also be colored. Alternatively, raw material powders of different particle sizes can be colored differently.

[0050] In actual products, irregular transition surfaces may also appear. That is, transition surface 3 may be a roughly flat surface, an irregular surface, or a distinct particle transition zone. A particle transition zone refers to an area formed by the interweaving of different powders, but there are distinct individual areas composed of different powders on both sides of this area.

[0051] Example 5: Refer to Figure 12The porous material pen refill of this embodiment includes a head 1 and a handle 2 connected thereto, wherein both the head 1 and the handle 2 are composed of porous components; the porous components of the head 1 and the handle 2 have different average pore diameters; in this embodiment, the porous component of the head 1 has a first average pore diameter, and the porous component of the handle 2 has a second average pore diameter, and the first average pore diameter is smaller than the second average pore diameter; there is no significant boundary surface between the pore diameter of the head 1 and the pore diameter of the handle 2. That is, the pore diameter of the handle 2 is larger than the pore diameter of the head 1, and the pore diameter decreases regularly or irregularly along the direction from the handle 2 to the head 1, rather than as... Figure 2 The embodiments shown have an interface between the handle 2 and the head 1 where there is a relatively obvious change in particle size and / or pore size.

[0052] The porous components of the head 1 and the handle 2 are made of the same size granular material, so that the parts of the entire pen refill after sintering have roughly the same average particle size.

[0053] Preferably, the average particle size of the head 1 differs from the average particle size of the handle 2 by less than 20%. The aforementioned difference in average particle size can also be 19%, 18%, 17%, 16%, 15%, 14%, 13%, 12%, 11%, 10%, 9%, 8%, 7%, 6%, 5%, 4%, 3%, 2%, 1%, 0.5%, 0.3%, or 0.1%. This embodiment can have an axe-shaped pen tip, a U-shaped pen tip, a conical pen tip, or other shapes, which will not be illustrated further.

[0054] Although the present invention has been described in conjunction with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various changes, substitutions and modifications to the subject matter listed herein without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A cosmetic applicator of the type comprising a porous material refill, comprising a hollow barrel (5), a roll pack refill (6) disposed within said barrel (5), characterized in that: The open end of the pen barrel (5) is fitted with a porous material pen core, which has a head (1) and a handle (2) connected thereto; the head (1) and the handle (2) are both made of porous materials; there is one or two connecting surfaces (3) between the head (1) and the handle (2); the connecting surface (3) and the axial direction of the porous material pen core are at an angle of 80 degrees to 100 degrees; the two sides of the connecting surface have different porosities; the two sides of the connecting surface have different average particle sizes.

2. A porous material applicator according to claim 1, wherein: The head (1) side or the handle (2) side has a groove (4); the bottom of the groove (4) is flush with a part of the side of the handle (2).

3. A porous material pen refill applicator according to claim 1, characterized in that: The porous material pen refill is U-shaped, and the handle (2) of the U-shaped porous material pen refill is connected to the open end of the pen barrel (5) via a positioning plug (7); the plug (7) has a fixing plug (71) that can cooperate with the open end of the pen barrel (5); the fixing plug (71) has a through hole (71a) through which the handle (2) of the U-shaped porous material pen refill can pass; the plug (7) has a transparent sheet (72) that can be wrapped by the U-shaped porous material pen refill; the edge of the transparent sheet (72) has a fixing groove (72a) for fixing the U-shaped porous material pen refill.

4. A porous material pen refill applicator according to claim 1, characterized in that: The porous components of the head (1) and the handle (2) have different average pore diameters; the porous component of the head (1) has a first average pore diameter, and the porous component of the handle (2) has a second average pore diameter; the first average pore diameter is less than or equal to the second average pore diameter; the ratio of the first average pore diameter to the second average pore diameter is 1:5 to 1:

50.

5. A porous material pen refill applicator according to claim 1, characterized in that: The porous components of the head (1) and the handle (2) have different average particle sizes; the porous component of the head (1) has a first average particle size, and the porous component of the handle (2) has a second average particle size; the first average particle size is smaller than the second average particle size; the ratio of the first average particle size to the second average particle size is 1:2 to 1:

60.

6. A porous material pen refill applicator according to claim 1, characterized in that: The porous components of the head (1) and the handle (2) have different porosities; the porous component of the head (1) has a first porosity, and the porous component of the handle (2) has a second porosity; the first porosity is less than the second porosity; the ratio of the first porosity to the second porosity is 1:1.1 to 1:

40.

7. A porous material pen refill according to claim 1, characterized in that: The porous material pen refill has a head (1) formed by a porous component and a handle (2) connected thereto; the porous component has at least one connecting surface (3); at least a portion of the head (1) is a different color from the handle (2) or the rest of the head (1).

8. A cosmetic applicator of the type comprising a hollow barrel (5) and a roll-up core (6) housed in said barrel (5), characterized in that: The pen barrel (5) has a porous material pen core installed at its open end. The porous material pen core has a head (1) and a handle (2) connected thereto. Both the head (1) and the handle (2) are made of porous components. The porous components of the head (1) and the handle (2) have different average pore diameters. The porous component of the head (1) has a first average pore diameter, and the porous component of the handle (2) has a second average pore diameter. The first average pore diameter is smaller than the second average pore diameter. The porous components of the head (1) and the handle (2) are made of the same specification of granular material. The average particle size of the head (1) and the average particle size of the handle (2) differ by less than 20%.

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