Makeup pen and manufacturing method therefor
By incorporating a lead sleeve and friction pusher into the makeup brush, the problem of lead deformation, detachment, and breakage due to temperature changes is solved, achieving stable lead extension and retraction, and improving reliability and flexibility of use.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- SHANGHAI RONGAO PACKAGING TECHNOLOGY CO LTD
- Filing Date
- 2025-02-27
- Publication Date
- 2026-06-18
Smart Images
Figure CN2025079491_18062026_PF_FP_ABST
Abstract
Description
A cosmetic pen and its manufacturing method Technical Field
[0001] This invention belongs to the field of cosmetic technology, and in particular relates to a cosmetic pen and its assembly method. Background Technology
[0002] In modern society, people use makeup pens to draw their eyebrows for beauty purposes. Existing eyebrow makeup pens typically consist of a pen body and a cap. Inside the pen body is a lead and a pushing mechanism that ejects the lead. The pushing mechanism usually includes a push rod. Only a very short portion of the lead is fixed to the front end of the push rod, while the vast majority of the lead, except for the rear end, is unsupported within the pen body. This makes the lead prone to deformation when temperatures change. Once deformed, it becomes difficult to eject the lead and the eyebrow drawing effect deteriorates. Furthermore, the lead is at risk of detaching from the push rod or breaking if dropped or impacted. Summary of the Invention
[0003] The technical problem to be solved by this invention is to provide a cosmetic pen with a retractable, non-deformable, and non-risk-of-falling-off or breakage tip, thereby overcoming the shortcomings of the existing technology.
[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0005] A makeup brush, comprising:
[0006] The pen body has a pen core cavity inside, and the front end of the pen core cavity has a pen core outlet;
[0007] The pen refill is disposed within the pen refill cavity;
[0008] The propulsion mechanism, which is disposed within the pen body, has a push rod capable of moving forward or backward within the pen body, characterized in that:
[0009] The pen refill cavity is also provided with a pen refill sleeve that covers the entire pen refill. The pen refill cavity is also provided with a stop structure for limiting the movement stroke of the pen refill sleeve. The push rod has a friction push head at its front end that extends into the pen refill sleeve and rubs against the inner wall of the pen refill sleeve.
[0010] Using the above technical solution, the present invention provides a pen refill sleeve inside the pen refill cavity to enclose the entire pen refill. Due to the support and enclosure of the pen refill sleeve, the pen refill will not deform due to temperature changes, and there is no risk of it falling off or breaking. Since a stop structure is also provided inside the pen refill cavity to limit the movement of the pen refill sleeve, and the push rod has a friction push head at its front end that extends into the pen refill sleeve and rubs against the inner wall of the pen refill sleeve, initially, the push rod advances through the action of the propulsion mechanism. The friction push head of the push rod, using the friction force with the inner wall of the pen refill sleeve, can drive the pen refill sleeve to move the pen refill along with it. When the pen tip reaches the stop structure within the pen tip cavity, even if the push rod continues to push, the pen tip will be stopped and unable to move forward. The friction push head, however, will overcome the friction with the inner wall of the pen tip and continue moving forward, thus pushing the pen tip forward within the pen tip cavity until it is expelled from the pen tip outlet at the front of the pen body. Once the desired length is reached, the pushing mechanism stops, and the user can then use the protruding portion of the pen tip for makeup application. After the user finishes applying makeup, the push mechanism is activated, causing the push rod to retract. The friction push head on the push rod then again uses friction with the inner wall of the pen tip to drive the pen tip cavity back into the pen body. Of course, during use, if the pen tip is pushed into place by the push mechanism and then stopped by the stop mechanism, and the portion of the pen tip protruding from the pen body is too short, the user can use the push mechanism to continue pushing the push rod forward to squeeze more of the pen tip out of the pen tip cavity to achieve the required protruding length.
[0011] As can be seen, the present invention uses a pen refill sleeve to completely wrap and support the pen refill. The pen refill can be squeezed out to the required length of the pen body according to the usage needs, and the pen refill can be retracted back into the pen body when not in use. It has the advantages that the pen refill will not deform due to temperature changes and there is no risk of breakage or falling off.
[0012] In addition, the present invention also provides a method for manufacturing a cosmetic pen, including a pen core filling step and a parts assembly step. The pen core filling step involves filling a gel-like pen core material into the pen core sleeve to form a pen core. The parts assembly step includes inserting the friction pusher of the push rod into the pen core sleeve from the rear end of the pen core sleeve.
[0013] In this invention, the front end face of the pen refill sleeve has a specific shape. The pen refill filling step involves sealing the front end of the pen refill sleeve with a mold, and then injecting the pen refill material into the pen refill sleeve from the rear end. The mold has a sealing surface with the same shape as the front end face of the pen refill sleeve. This allows for direct filling to achieve the desired shape of the pen refill's front end face. Attached Figure Description
[0014] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:
[0015] Figure 1 is a structural cross-sectional view of Embodiment 1;
[0016] Figure 2 is an enlarged view of point A in Figure 1;
[0017] Figure 3 is an enlarged view of point B in Figure 1;
[0018] Figure 4 is an enlarged view of point C in Figure 1;
[0019] Figure 5 is a schematic diagram of the pen tip structure in Example 1;
[0020] Figure 6 is a schematic diagram of the bushing structure in Example 1;
[0021] Figure 7 is a schematic diagram of the pen barrel structure of Example 1;
[0022] Figure 8 is a schematic diagram of the spiral sleeve in Example 1;
[0023] Figure 9 is a cross-sectional view along direction AA in Figure 1;
[0024] Figure 10 is a cross-sectional view along the BB direction in Figure 1;
[0025] Figure 11 is a cross-sectional view along the CC direction in Figure 1;
[0026] Figure 12 is a cross-sectional view along the DD direction in Figure 1;
[0027] Figure 13 is a structural cross-sectional view of Embodiment 2;
[0028] Figure 14 is an enlarged view of point D in Figure 13;
[0029] Figure 15 is an enlarged view of point E in Figure 13;
[0030] Figure 16 is a schematic diagram of the pen barrel structure in Example 2;
[0031] Figure 17 is a schematic diagram of the pen tip structure in Example 2;
[0032] Figure 18 is a structural schematic diagram of the bushing and spiral sleeve integrated in Example 2;
[0033] Figure 19 is a schematic diagram of the push rod structure in Example 2;
[0034] Figure 20 is a cross-sectional view along the EE direction in Figure 13;
[0035] Figure 21 is a cross-sectional view along the FF direction in Figure 13;
[0036] Figure 22 is a cross-sectional view along the GG direction in Figure 13;
[0037] Figure 23 is a cross-sectional view along the HH direction in Figure 13. Detailed Implementation
[0038] Example 1
[0039] As shown in Figure 1, the makeup pen of this embodiment includes a pen body 100, a pen core 200 disposed in the pen body 100 and a propulsion mechanism 300, and a pen cap 400 sleeved with the pen body 100.
[0040] The pen body 100 consists of a pen tip 110, a bushing 120, and a pen barrel 130.
[0041] As shown in Figure 5, the pen tip 110 has a through-hole pen core cavity 500 inside, and its outer periphery is divided into a conical section 111 and a cylindrical section 112 located at the rear end from front to back. The pen core cavity 500 is formed from front to back into an outlet section 510, a main body section 520, a stroke section 530, and a socket section 540 with progressively increasing apertures.
[0042] As shown in Figure 1 and Figure 2, a first step 531 is formed at the junction of the travel segment 530 and the main body segment 520. This first step 531 is the stop structure of the present invention. A second step 511 is formed at the junction of the outlet segment 510 and the main body segment 520.
[0043] It also includes a refill sleeve 600 installed in the refill cavity 500. The inner wall of the refill sleeve 600 forms a through refill hole 601, and the entire refill 200 is completely filled into the refill hole 601 of the refill sleeve 600, that is, the refill sleeve 600 can cover the entire refill. The main body of the refill sleeve 600 is located in the main body section 520 of the refill cavity 500, and the rear end has a flange 602 with a raised circumferential surface located in the stroke section 530.
[0044] The sleeve section 540 of the pen tip 110 is sleeved on the front section 121 of the bushing 120. A circumferential stop structure and an axial stop structure are provided between the sleeve section 540 and the front section 121. The circumferential stop structure prevents the pen tip 110 from rotating relative to the bushing 120, and the axial stop structure prevents the pen tip 110 from moving axially relative to the bushing 120, thus fixing the pen tip 110 to the front section 121 of the bushing 120.
[0045] As shown in Figure 1, combined with Figures 3, 7, 8, and 12, the pen barrel 130 is a cylindrical rod with an internal pen barrel cavity 700 that is closed at the rear and open at the front. This pen barrel cavity 700 is divided into an open section 710, a middle section 720, and a rear section 730 from front to back. The open section 710 is fitted onto the rear section 122 of the bushing 120, and there is an axial stop structure between them, but no circumferential stop structure, meaning the pen barrel 130 can rotate relative to the bushing 120.
[0046] The propulsion mechanism 300 includes a push rod 310 and a spiral sleeve 320 that drives the push rod 310 forward and backward. The spiral sleeve 320 is located in the pen barrel 130.
[0047] The push rod 310 is divided into a smooth section 311 and a threaded section 312 from front to back. The smooth section 311 extends out of the bushing 120 and has a friction pusher 311a at its front end that inserts into the refill hole 601 from the rear end of the refill sleeve 600. The threaded section 312 is located in the rear section 730 of the pen barrel cavity 700. The inner wall of the rear section 730 has circumferentially evenly spaced protrusions 731. The front end of the protrusions 731 has a stop step 731a and a flat protrusion 731b extending in front of its stop step 731a. The screw sleeve 320 is located in the middle section 720 and is fitted onto the threaded section 312. Its front end face is stopped by the rear end face of the bushing 120, and its rear end face is stopped by the stop step 731a. The circumferential surface of the screw sleeve 320 also has a protruding strip 321 located in the gap between two adjacent flat protrusions 731b. With this structure, the spiral sleeve 320 will rotate together with the pen barrel 130.
[0048] As shown in Figures 4, 8, and 12, the spiral sleeve 320 also has two symmetrical spring pieces 322. The inner surface of the spring piece 322 has threads 323 that engage with the threaded section 312. The outer surface of the spring piece 322 has spherical protrusions 324 that limit the degree of spring opening of the spring piece 322 when blocked by the pen barrel.
[0049] Using the above technical solution, when in use, the pen barrel 130 is rotated forward relative to the pen barrel 110. The pen barrel 110 will drive the spiral sleeve 320 inside the pen barrel 130 to rotate together. The spiral sleeve 320, through engagement with the threaded section 312 of the push rod 310, drives the push rod 310 to move forward along the axial direction of the bushing 120, but does not drive the push rod 310 to rotate relative to the bushing 120. The friction push head 311a at the front end of the push rod 310 will drive the pen refill sleeve 600 and the pen refill 200 forward through friction with the inner wall of the pen refill sleeve 600. When the flange 602 at the rear end of the pen refill sleeve 600 touches the first step 531, which serves as a stop structure... Continuing to rotate the pen barrel forward, the pen refill sleeve 600 will be stopped by the stop structure and unable to move forward. The friction pusher head 311a will overcome the friction with the inner wall of the pen refill sleeve 600 and continue to move forward, thus pushing the pen refill 200 forward within the sleeve 600 until it is squeezed out through the refill outlet 513 at the front end of the refill cavity 500 and protrudes beyond the pen tip 110. Once the desired protruding length is reached, rotation of the pen barrel 130 stops. At this point, the user can use the protruding portion of the pen refill 200 beyond the pen tip 110 for makeup application. After the user finishes applying makeup, reversing the pen barrel causes the spiral sleeve 320 to drive the push rod 310 backward. At this time, the friction push head 311a of the push rod 310 again uses friction with the inner wall of the pen refill sleeve 600 to drive the pen refill sleeve 600 back, causing the pen refill 200 to retract from the pen tip 110, retracting the portion of the pen refill 200 protruding from the pen tip 110 back into the pen tip cavity 500 of the pen tip 110. When the pen barrel 130 is rotated forward again, the pen refill 200 can be pushed out of the pen tip again. Of course, during use, if it is found that the portion of the pen refill 200 protruding from the pen tip is too short, continuing to rotate the pen barrel 130 forward can extend the pen refill 200 further out of the pen tip 110 to achieve the desired protrusion length.
[0050] It should be noted that when the flange 602 at the rear end of the pen refill sleeve 600 touches the first step 531, there should still be a gap between the front end face of the pen refill sleeve 600 and the second step 513 to prevent the pen refill sleeve 600 from being interfered with by the second step 613 when it moves in the pen refill cavity 500.
[0051] When the pen is rotated, only the pen barrel 130 and the spiral sleeve 320 rotate relative to the push rod 310. The push rod 310 does not rotate relative to the bushing 120, the refill sleeve 600, and the pen tip 110; it only moves forward and backward relative to the bushing 120, the refill sleeve 600, and the pen tip 110. Therefore, in this embodiment, the cross-sectional shape of the refill 200 is not required; the cross-sectional shape of the refill can be circular or irregular. For example, in this embodiment, as shown in Figures 9 to 11, the cross-sectional shape of the refill 200 is flat. Correspondingly, the cross-sectional shapes of the refill outlet 513, the refill cavity 500, the refill sleeve 600, the refill hole 601, the smooth rod section 311, and the friction push head 311a are all flat.
[0052] When the pen refill 200 is a viscous, soft gel, directly squeezing the pen refill with the friction pusher 200 will cause the friction pusher 200 to get stuck inside the pen refill, making it impossible to scrape the pen refill material off the inner wall of the pen refill sleeve 600. The pen refill material will then stick to the inner wall of the pen refill sleeve 600. To overcome this defect, as shown in Figure 2, a first sealing ring groove 313 is provided on the circumferential surface of the friction pusher 311a. A first sealing ring 314 is provided within this first sealing ring groove 313, which tightly fits against the inner wall of the pen refill sleeve 600. This first sealing ring 314 achieves friction and airtightness with the inner wall of the pen refill sleeve 600. This creates a sealed space within the pen refill sleeve 600 between the rear end face of the pen refill 200 and the friction pusher head 311a. This sealed space contains trapped air. Once the pen refill sleeve is stopped by the stop structure, the friction pusher head 311a compresses the air in the sealed space as it continues to push forward, turning the air into high-pressure gas. This high-pressure gas pushes the pen refill 200 as the friction pusher head 311a moves forward, preventing the pen refill 200 from being directly pushed by the friction pusher head 311a. When the pen refill 200 is a viscous, soft gel, the high-pressure gas can push the pen refill material on the inner wall of the pen refill sleeve forward, thus preventing the pen refill material from adhering to the inner wall of the pen refill sleeve.
[0053] In this embodiment, as shown in Figures 3 and 5 to 7, the circumferential stop structure between the sleeve section 540 and the front section 121 consists of a positioning groove 541 on the inner wall of the opening of the sleeve section 540 and a positioning protrusion 121a on the front section 121 and engaged in the positioning groove 541. The axial stop structure between the sleeve section 540 and the front section 121 consists of a first annular groove 542 on the inner wall of the sleeve section 540 and a first annular protrusion 121b on the outer surface of the front section 121 and engaged in the first annular groove 542. The axial stop structure between the opening section 710 and the rear section 122 consists of a second annular groove 711 on the inner wall of the opening section 710 and a second annular protrusion 122a on the outer surface of the rear section 122 and engaged in the second annular groove 711.
[0054] In order to ensure that the pen barrel 130 rotates smoothly on the bushing 120, a second sealing ring groove 122b is provided on the outer surface of the rear section 122 in front of the second annular protrusion 122a. A second sealing ring 712 that contacts the inner wall of the opening section 710 of the pen barrel 130 is fixed in the second sealing ring groove 122b.
[0055] As shown in Figure 2, the pen cap 400 is fastened onto the conical segment 111 of the pen tip 110, and there is an anti-detachment positioning structure between them to prevent the pen cap 400 from falling off the conical segment 111. After fastening, the open end face of the pen cap 400 abuts against the front end face of the cylindrical segment 112. This anti-detachment positioning structure consists of a third annular protrusion 111a on the outer surface of the conical segment 111 and a fourth annular protrusion 401 on the inner wall of the pen cap 400 that interlocks with the third annular protrusion 111a. A fifth annular protrusion 402 is also provided on the inner wall of the pen cap 400 near the opening. After the pen cap 400 is fastened onto the conical segment 111 of the pen tip 110, the fifth annular protrusion 402 abuts against the circumferential surface of the conical segment 111. In addition, the inner surface of the sleeve section 540 of the pen refill cavity 500 also has a sixth annular protrusion 542 that abuts against the front section 121 of the bushing 120. The fifth annular protrusion 402 and the sixth annular protrusion 542 play an airtight role, ensuring that after the pen cap 400 is fastened to the pen tip 110, a sealed space is formed between the pen cap 400 and the pen tip 110, preventing the evaporation of moisture in the pen refill 200, preventing the pen refill 200 from drying out, and improving the service life of the pen refill.
[0056] In this embodiment, as shown in Figure 1, the front end face of the pen refill sleeve 600 is set as a shaped surface. By setting the front end face of the pen refill sleeve 600 into a desired shape, the front end of the pen refill can be directly filled into the corresponding shape when filling the pen refill. In this embodiment, the front end face of the pen refill sleeve 600 is set as a curved surface in the shape of a cleaver, the same as the front end face of the pen tip 110. Setting the front end face of the pen refill sleeve 600 as a curved surface allows the front end of the pen refill 200 to be directly filled into a cleaver shape when filling the pen refill. Similarly, when the front end face of the pen refill sleeve 600 is set with other shapes, the front end of the pen refill 200 will be directly filled into the corresponding other shapes.
[0057] The above is the cosmetic pen of this embodiment, and its manufacturing method includes a refilling step and a parts assembly step:
[0058] The pen refill filling process is as follows: A mold is used to seal the front end of the pen refill sleeve, and gel-like pen refill material is poured into the sleeve from the rear end to form the pen refill. The mold has a sealing surface with the same shape as the front end of the pen refill sleeve.
[0059] Referring to Figure 1, the assembly steps for the parts are as follows:
[0060] S1. Install the spiral sleeve 320 in the middle section 720 of the pen barrel, so that the protrusion 321 on the spiral sleeve 320 is engaged in the gap between adjacent flat protrusions 731b in the pen barrel cavity 700, and the rear end face of the spiral sleeve 320 contacts the stop step 731a at the front end of the protrusion 731.
[0061] S2. Insert the threaded section 312 of the push rod 310 through the screw sleeve 320 into the pen barrel cavity 700, so that the rear end of the push rod 310 abuts against the bottom of the pen barrel cavity 700.
[0062] S3. Place the bushing 120 onto the smooth section 311 of the push rod 310 and insert the rear section 122 of the bushing 120 into the open section 710 of the pen barrel 130, so that the second annular protrusion 122a on the rear section 122 is stuck in the second annular groove 711 of the open section 710.
[0063] S4. Insert the friction pusher 120a, which is exposed outside the bushing 120, into the pen refill hole 601 from the rear end of the pen refill sleeve 600.
[0064] S5. The pen tip cavity 500 of the pen tip 110 is fitted onto the pen tip sleeve 600 and installed on the front section 121 of the bushing 120, so that the positioning protrusion 121a and the first annular protrusion 121b on the front section 121 are respectively engaged in the positioning groove 541 and the first annular groove 541 of the sleeve portion 540 of the pen tip cavity 500.
[0065] S6. Snap the pen cap 400 onto the pen tip 110, so that the fourth annular protrusion 401 inside the pen cap 400 is engaged with the third annular protrusion 111a on the pen tip 110.
[0066] Example 2
[0067] As shown in Figures 13 to 19 and Figure 23, the difference between this embodiment and Embodiment 2 is that the push rod 310 can rotate relative to the bushing 120 and the pen tip 110, and can also move forward and backward relative to the bushing 120 and the pen tip 110. The pen barrel 130 cannot rotate relative to the push rod 310; the push rod 310 can only move forward and backward along the pen barrel 130. Because the push rod 310 needs to rotate relative to the pen tip 110, the cross-section of the pen core 200 and the smooth rod portion 311 of the push rod 310 can only be circular, not irregular.
[0068] Specifically, the spiral sleeve 320 needs to be fixedly connected to the rear section of the bushing 120. In this embodiment, the spiral sleeve 320 and the rear section 122 of the bushing 120 are integrated. The surface of the spiral sleeve 320 does not have a protruding strip that engages between adjacent protruding ribs 731, and there is a gap between the rear end face of the spiral sleeve 320 and the protruding rib 731 of the pen barrel 130. The rear end surface of the threaded rod 312 has a protruding slider 312a that engages between adjacent protruding ribs 731. In this way, the pen barrel 130 can drive the push rod 310 to rotate in the spiral sleeve 310, that is, the push rod 310 rotates relative to the bushing 120 and the pen tip 110, and moves forward and backward relative to the bushing 120 and the pen tip 110.
[0069] In this embodiment, as shown in Figures 20 to 22, the cross-sections of the pen tip outlet 513, pen tip 200, pen tip cavity 500, pen tip sleeve 600, pen tip hole 601, and the smooth rod portion 311 of the push rod 310 are all circular.
[0070] The other structures and embodiments are the same, and will not be described again here.
[0071] Because the raised slider 312a is engaged between adjacent protruding ridges 731 in the pen barrel cavity 700, rotating the pen barrel 130 will cause the push rod 310 to rotate relative to the spiral sleeve 320, bushing 120, and pen tip 110, causing the push rod 310 to move forward and backward within the spiral sleeve 320 and bushing 120. Similarly, when the pen barrel 130 rotates clockwise, the friction push head 311a at the front end of the push rod 310 will drive the pen refill sleeve 600 and the pen refill 200 forward through friction with the inner wall of the pen refill sleeve 600. When the flange 602 at the rear end of the pen refill sleeve 600 touches the first step 531, which serves as a stop structure... Continuing to rotate the pen barrel forward, the pen refill sleeve 600 will be stopped by the stop structure and unable to move forward. The friction pusher head 311a will overcome the friction with the inner wall of the pen refill sleeve 600 and continue to move forward, thus pushing the pen refill 200 forward within the sleeve 600 until it is squeezed out through the refill outlet 513 at the front end of the refill cavity 500 and protrudes beyond the pen tip 110. Once the desired protruding length is reached, rotation of the pen barrel 130 stops. At this point, the user can use the protruding portion of the pen refill 200 beyond the pen tip 110 for makeup application. After the user finishes applying makeup, reversing the pen barrel causes the spiral sleeve 320 to drive the push rod 310 backward. At this time, the friction push head 311a of the push rod 310 again uses friction with the inner wall of the pen refill sleeve 600 to drive the pen refill sleeve 600 back, causing the pen refill 200 to retract from the pen tip 110, retracting the portion of the pen refill 200 protruding from the pen tip 110 into the pen tip cavity 500. When the pen barrel 130 is rotated forward again, the pen refill 200 can be pushed out of the pen tip again. Of course, during use, if it is found that the portion of the pen refill 200 protruding from the pen tip is too short, continuing to rotate the pen barrel 130 forward will allow the pen refill 200 to protrude further from the pen tip to achieve the desired length.
[0072] The makeup brush in this embodiment is only applicable to cylindrical brush tips with a circular cross-section.
[0073] Similarly, the manufacturing method of the cosmetic pen in this embodiment also includes a pen core filling step and a parts assembly step:
[0074] The pen refill filling process is as follows: The front end of the pen refill sleeve is sealed with a mold, and a gel-like pen refill material is poured into the sleeve from the rear end to form the pen refill. In this embodiment, the sealing surface of the mold can be a flat surface.
[0075] Referring to Figure 13, the assembly steps for the parts are as follows:
[0076] S1. The bushing 120 with the spiral sleeve 320 is fitted onto the push rod 310, so that the spiral sleeve 320 engages with the threaded rod 312 of the push rod 310.
[0077] S2. Insert the rear section 122 of the push rod 310 and bushing 320 into the pen barrel 130, so that the protruding slider 312a at the rear end of the threaded rod 312 of the push rod 310 is engaged in the gap between the adjacent protruding ridges 731, and the second annular protrusion 122a on the rear section 122 is engaged in the second annular groove 711 of the opening section 710, so that the rear end of the push rod 310 abuts against the bottom of the pen barrel cavity 700.
[0078] S3. Insert the friction pusher 120a, which is exposed outside the bushing 120, into the pen refill hole 601 from the rear end of the pen refill sleeve 600.
[0079] S4. The pen tip cavity 500 of the pen tip 110 is fitted onto the pen tip sleeve 600 and installed on the front section 121 of the bushing 120, so that the positioning protrusion 121a and the first annular protrusion 121b on the front section 121 are respectively engaged in the positioning groove 541 and the first annular groove 541 of the sleeve portion 540 of the pen tip cavity 500.
[0080] S5. Snap the pen cap 400 onto the pen tip 110, so that the fourth annular protrusion 401 inside the pen cap 400 is engaged with the third annular protrusion 111a on the pen tip 110.
Claims
1. A makeup brush, comprising: The pen body has a pen core cavity inside, and the front end of the pen core cavity has a pen core outlet; The pen refill is disposed within the pen refill cavity; The propulsion mechanism, which is disposed within the pen body, has a push rod capable of moving forward or backward within the pen body, characterized in that: The pen refill cavity is also provided with a pen refill sleeve that covers the entire pen refill. The pen refill cavity is also provided with a stop structure for limiting the movement stroke of the pen refill sleeve. The push rod has a friction push head at its front end that extends into the pen refill sleeve and rubs against the inner wall of the pen refill sleeve.
2. The cosmetic pen according to claim 1, characterized in that: The peripheral surface of the friction pusher is provided with a sealing ring that makes frictional contact with the inner wall of the pen refill sleeve and provides an airtight seal.
3. The cosmetic pen according to claim 1, characterized in that: The pen body consists of a bushing, a pen tip fixed to the front section of the bushing, and a pen barrel rotatably disposed at the rear section of the bushing.
4. The cosmetic pen according to claim 3, characterized in that: The pen refill cavity is located inside the pen tip and is divided into an outlet section, a main body section, a travel section, and a connecting section from front to back. The connecting section is fixed on the front section of the bushing. The junction of the main body section and the travel section forms a first step as a stop structure. The rear end of the pen refill sleeve has a flange located within the travel section.
5. The cosmetic pen according to claim 4, characterized in that: The push rod is located in the bushing and the pen barrel, and is divided into a smooth rod section and a threaded section from front to back. The propulsion mechanism also includes a spiral sleeve installed in the pen barrel and fitted on the threaded section. By rotating the pen barrel, the push rod is driven to move forward and backward by the spiral sleeve.
6. The cosmetic pen according to claim 5, characterized in that: The spiral sleeve is fixed inside the pen barrel cavity, and the pen barrel drives the spiral sleeve to rotate.
7. The cosmetic pen according to claim 6, characterized in that: The pen refill and the pen refill cavity have a circular or irregular cross-section.
8. The cosmetic pen according to claim 5, characterized in that: The spiral sleeve is fixedly connected to the rear section of the bushing. The pen barrel cavity has circumferentially spaced protrusions. The rear end of the threaded section has a protruding slider that is engaged in the gap between adjacent protrusions. The pen barrel drives the push rod to rotate.
9. A method for manufacturing a cosmetic pen according to claim 1, characterized in that: The device includes a refilling step and a parts assembly step. The refilling step involves filling the refill sleeve with a gel-like refill material to form the refill. The parts assembly step includes inserting the friction pusher of the push rod into the refill sleeve from the rear end of the refill sleeve.
10. The method for manufacturing a cosmetic brush according to claim 9, characterized in that: The front end of the pen refill sleeve has a shape. The pen refill filling step is to seal the front end of the pen refill sleeve with a mold and pour the pen refill material into the pen refill sleeve from the rear end of the pen refill sleeve. The mold has a sealing surface with the same shape as the front end of the pen refill sleeve.