Multi-color inner core makeup pen

Abstract

This utility model relates to a multi-color refill makeup pen, which includes a pen shell and a refill mechanism. The pen shell includes a pen tip and a pen body. The pen tip has a refill hole inside, and the outer side of the pen body has an elongated groove and a sliding button along the axial direction of the pen body. The refill mechanism includes a refill rotating bracket and a refill rod assembly. The refill rod assembly includes a refill rod, a refill holder, a refill protective sleeve, and a spring. When the rotating bracket rotates to the point where the refill rod assembly is aligned with the refill hole of the pen tip, the corresponding refill protective sleeve extends into the refill hole under the action of the spring and forms a sliding seal with the refill hole through a second annular sealing ring. The remaining refill protective sleeves abut against the inner end of the pen tip under the action of the spring to form a planar seal. When the refill is not protruding from the refill hole, the end of the pen tip is fitted with a sealing cap to seal the corresponding refill inside the refill hole. This makeup pen effectively realizes the switching of multi-color refills, is quick and convenient to carry and use, and the refill has a reliable sealing structure, effectively preventing refill oxidation and improving the refill's lifespan.

Description

Technical Field

[0001] This utility model relates to cosmetic products, specifically a multi-color inner core makeup pen. Background Technology

[0002] Currently, makeup pencils, including eyebrow pencils, eyeliner pencils, and lip pencils, are mainly used for makeup application. These pencils typically have a single-core structure, meaning they contain only one lead. If you need to apply makeup, you need to prepare multiple pencils of different colors, which is relatively inconvenient to carry. To overcome this problem, existing patents, such as the Chinese patent publication CN208909210U (authorization announcement date May 31, 2019), entitled "A Novel Three-Color Eyeliner Pen," disclose a structure similar to existing three-color ballpoint pens. It features three sliding springs, each corresponding to one of the three colors of the lead. When needed, pressing one of the sliding springs ejects the corresponding lead. While this structure achieves the purpose of switching between multiple colors, the overall structure remains complex, requiring three sets of sliding springs and overcoming spring resistance, thus still presenting some inconvenience in use. Similar to this type of makeup pen, there is also the utility model entitled "A Push-Type Eyebrow Pencil" (authorization announcement number CN209073645U, authorized on July 9, 2019), which also uses an independent multi-set lead-out structure. These multiple sets of lead-out structures are arranged side-by-side, significantly impacting the grip and making them inconvenient to carry and use. Furthermore, existing multi-color makeup pens lack a proper sealing structure for the lead, causing it to be exposed to air for extended periods, leading to oxidation and affecting its lifespan and effectiveness. Therefore, improvements to the lead-out and sealing structures of existing makeup pens are needed. Summary of the Invention

[0003] To overcome the aforementioned shortcomings, the purpose of this utility model is to provide a multi-color refill makeup pen that addresses the technical problems of existing makeup pens having relatively complex refill switching structures, large sizes, inconvenient carrying and use, and lacking a good sealing structure, leading to easy oxidation and affecting the pen's lifespan and effectiveness. This objective is achieved through the following technical solution.

[0004] A multi-color refill makeup pen includes a pen shell and a refill mechanism. The pen shell includes a pen tip and a pen body. The pen tip is fixed to the bottom of the pen body and has a refill hole inside. The refill mechanism includes a rotating refill bracket rotatably placed inside the pen body, and a refill rod assembly evenly distributed on the circumference of the rotating refill bracket and slidingly engaged with it axially. A knob is positioned at the top of the pen body to drive the rotating refill bracket to rotate. The top of the refill rod assembly has an operating part, and the bottom is where the refill is fixed. An elongated groove is provided along the axial direction of the pen body on the outer side, and a sliding button is slidably engaged with the elongated groove. When the sliding button is at the top of the elongated groove, the inner end of the sliding button rotates with the rotating refill bracket. The pen body has an inner hole with a limit flange in the pen body, which provides axial positioning of the operating part at the top of the pen core assembly that is not engaged with the inner end of the sliding button. When the sliding button engages with the operating part of the corresponding pen core assembly, the pen core of the pen core assembly is aligned with the lead outlet hole of the pen tip. The pen core assembly includes a pen core, a pen core holder, and a pen core protective sleeve. The operating part is located at the top of the pen core, and an insertion hole is located at the bottom of the pen core. The pen core holder is cylindrical in shape and has a first annular sealing ring on its circumference. One end of the pen core holder has an insertion rod, and the other end holds the pen core. The pen core protective sleeve... One end is open, with an inner hole forming an internal hole that slides and seals with the main body of the pen refill holder and the first annular sealing ring. The other end of the pen refill protective sleeve has a through hole that slides and fits with the refill rod. The bottom of the refill rod extends into the through hole and is inserted and fixed with the insertion rod of the pen refill holder. The outer diameter of the pen refill protective sleeve near the open end has a second annular sealing ring. The rotating refill bracket has stepped grooves evenly distributed around its circumference that slide and fit with the refill rod assembly. A spring that fits the refill rod is installed in the stepped groove. One end of the spring is limited to one step of the stepped groove, and the other end of the spring elastically abuts against the through hole end of the pen refill protective sleeve. When the rotating refill bracket rotates to the stepped groove... When the bottom of the groove is opposite to the lead outlet hole of the pen tip, the corresponding lead protective sleeve extends into the lead outlet hole under the action of the spring, and forms a sliding seal with the lead outlet hole through the second annular sealing ring. The open ends of the remaining lead protective sleeves abut against the inner end of the pen tip under the action of the spring to form a planar seal. When the lead outlet hole does not extend out of the pen tip, the end of the pen tip is fitted with a sealing end cap to form a seal on the corresponding lead in the lead outlet hole. When the slider moves the lead rod to the top of the elongated groove, the lead rod moves the corresponding lead holder, and the lead holder moves the lead protective sleeve away from the lead outlet hole and compresses the spring.

[0005] With the above structure, there is no need for multiple sets of sliding buttons; only one sliding button, in conjunction with the knob on the top of the pen body, enables the switching and extension of the pen refill, making it quick and convenient to use. Furthermore, by improving the pen refill assembly, the pen refill is housed within a protective sleeve when not in use. A seal is provided between the pen refill holder and the protective sleeve, and a seal is also formed between the protective sleeve and the refill outlet when the refill is inserted into the pen tip. This, combined with the seal between the open end of the protective sleeve and the inner surface of the pen tip, and the sealing cap fitted onto the pen tip end, effectively seals and protects all the pen refills within the pen body, reducing contact with air, preventing oxidation, extending pen refill lifespan, and ensuring optimal performance.

[0006] The stepped groove of the rotating core support includes a core rod groove for sliding, a protective sleeve groove for sliding, and a sealing ring groove for sliding. The spring is located inside the protective sleeve groove, with one end of the spring positioned at the step between the protective sleeve groove and the core rod groove, and the other end of the spring elastically abutting against the through hole end of the protective sleeve. The diameter of the lead outlet hole of the pen tip matches the outer diameter of the pen tip. With this structure, the core rod groove of the rotating core support provides a stable guide for the core rod assembly, and the pen tip provides a stable guide for the pen tip, making the overall lead outlet operation more reliable and stable.

[0007] The inner end of the sliding button has an elastic locking block with a deformation groove in the middle and limiting slots on both sides that mate with the sides of the elongated sliding groove. The inner end of the elastic locking block has an arc-shaped recess, and the operating part at the top of the core rod is an annular recess that mates with the arc-shaped recess. The limiting flange is adapted to the annular recess. This structure enables the linkage between the inner end of the sliding button and the core rod. The core rod slides together with the sliding button, and the annular recess of the core rod can easily engage or disengage with the arc-shaped recess of the sliding button when the core rod rotates with the rotating core support.

[0008] The sliding button has elastic latches on both sides, and the long, narrow groove of the pen body has teeth on both sides that engage with the elastic latches. This structure ensures that the sliding button self-locks when it slides into position relative to the long, narrow groove, preventing the button, the refill rod, and the pen tip from sliding easily, making it more reliable and convenient to use.

[0009] The cylindrical hole at the top of the pen body has at least one annular groove, and the circumference of the knob has an annular rib that mates with the annular groove. Through the engagement of the annular rib and the annular groove, the knob and the pen body form a positioning rotation. This structure enables quick connection between the knob and the pen refill, and allows the knob to rotate freely.

[0010] The cylindrical hole at the top of the pen body has an array of positioning grooves along its annular inner wall, corresponding to the number of core rods in the refill bracket. The circumference of the knob has spring grooves that alternately align with each of the positioning grooves during rotation. Each spring groove contains a tension spring and a ball bearing. When the spring groove aligns with a positioning groove, the ball bearing, under the action of the tension spring, partially protrudes from the spring groove and engages with the positioning groove to form an elastic locking state. In this elastic locking state, the operating part of one of the core rods of the refill bracket engages with the overlapping part of the sliding knob. Through this structure, when the knob drives the refill bracket to rotate, each time the operating part of the core rod engages with the operating part of the sliding knob, the ball bearing in the spring groove engages with the positioning groove in the cylindrical hole of the pen body to form a locking limit state, making it easy to determine when the core rod has rotated to the correct position and facilitating the switching of pen refills.

[0011] The end of the pen refill holder has a side-opening elastic clip that holds the pen refill. This structure facilitates quick connection between the pen refill holder and the pen refill.

[0012] The insertion hole of the core rod is replaced with a threaded hole, and the insertion rod of the pen refill holder is replaced with a screw. This structure not only achieves effective connection between the core rod and the pen refill holder but also provides length adjustment to meet the actual installation position requirements of the core rod and pen refill holder.

[0013] The bottom of the pen body has an irregularly shaped opening with at least one retaining groove. One end of the pen tip is pointed, and the other end has an irregularly shaped head that mates with the irregularly shaped opening. The irregularly shaped head has a retaining rib that mates with the retaining groove. Thus, the pen body and pen tip are fixed together by the retaining groove and retaining rib. This structure allows for a detachable and quick connection between the pen body and pen tip, facilitating the replacement of the pen refill.

[0014] The knob has a ring-shaped array of teeth on its circumference, and a cap is fitted onto the outside of the knob in an interference fit with the teeth. This structure not only makes the addition of the cap more aesthetically pleasing, but also allows the knob to be installed first and then the cap to be installed, minimizing the gap between the cap and the pen body. It is both aesthetically pleasing and provides good dust protection.

[0015] This utility model features a compact and reasonable overall structure, effectively enabling the switching of multiple color refills. It is quick and convenient to carry and use, and the refill has a reliable sealing structure, effectively preventing oxidation and extending its lifespan. It is suitable for use as a multi-color refill makeup pen in the cosmetics industry, or as an improvement on the structure of similar makeup pens. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the partial explosion structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the pen body structure of this utility model.

[0018] Figure 3 This is a partial structural schematic diagram of the present invention.

[0019] Figure 4 This is a schematic diagram of the assembly structure of the rotating core bracket and core rod assembly of this utility model.

[0020] Figure 5 This is a schematic diagram of the internal cross-sectional structure of this utility model.

[0021] Figure 6 This is a schematic diagram of the inner structure of the slider of this utility model.

[0022] Figure 7 yes Figure 6 A schematic diagram of the structure in which the sliding button and the operating part of the core rod overlap and cooperate.

[0023] Figure 8 This is a schematic diagram of the assembly structure of the pen body and pen tip of this utility model.

[0024] The numbers and names in the diagram are as follows: 1. Pen tip; 101. Irregularly shaped tip; 102. Core outlet hole; 103. Buckling rib; 2. Sealing end cap; 3. Pen body; 301. Long strip groove; 302. Annular groove; 303. Positioning groove; 304. Limiting flange; 305. Irregularly shaped opening; 306. Buckling groove; 4. Core rotating bracket; 401. Stepped groove; 4011. Core rod groove; 4012. Protective sleeve groove; 4013. Sealing ring groove; 5. Core rod assembly; 501. Core rod; 5011. Annular notch; 5 012, Insertion hole; 502, Pen refill holder; 5021, Insert rod; 5022, Elastic clamp; 5023, First annular sealing ring; 503, Pen refill protective sleeve; 5031, Second annular sealing ring; 504, Spring; 505, Pen refill; 6, Sliding button; 601, Elastic block; 602, Elastic buckle; 603, Limiting buckle groove; 604, Deformation groove; 605, Arc-shaped notch; 7, Knob; 701, Annular rib; 702, Spring groove; 703, Ball bearing; 704, Toothed rib; 8, Screw cap. Implementation

[0025] The present invention will now be further described with reference to the accompanying drawings.

[0026] like Figures 1-8 As shown, the multi-color inner core makeup pen includes a pen shell and a pen core mechanism. The pen shell includes a pen tip 1 and a pen body 3. The bottom of the pen body is provided with an irregular opening 305, and two locking grooves 306 are provided inside the irregular opening. The pen tip is provided with a core outlet hole 102. One end of the pen tip is pointed, and the other end is provided with an irregular head 101 that mates with the irregular opening at the bottom of the pen body. The irregular head is provided with two locking ribs 103, and the two locking ribs mate with the two locking grooves inside the irregular opening at the bottom of the pen body to form a locking and fixing position.

[0027] The aforementioned pen refill mechanism includes a refill bracket 4 and a refill rod assembly 5. The pen body has a cylindrical hole except for the irregular opening at the bottom. A rotating refill bracket is housed within this cylindrical hole. The bottom of the refill bracket is positioned against the pen tip 1, providing a planar restraint. A coupling connecting the top of the refill bracket is inserted into a knob 7. An annular groove 302 is located within the cylindrical hole at the top of the pen body. An annular rib 701 mates with the annular groove on the circumference of the knob. Through the engagement of the annular rib and the annular groove, the knob and pen body achieve a fixed rotation. Evenly distributed toothed ribs 704 are present on the circumference of the knob. A cap 8 is connected via an interference fit between the toothed ribs and the cap. The refill bracket can be rotated by turning the cap.

[0028] The aforementioned rotating core support has three sets of core rod assemblies 5 arranged in an axial sliding fit with the rotating core support in a uniform array on its four circumferences. The core rod assembly includes a core rod 501, a pen refill holder 502, and a pen refill protective sleeve 503. The top of the core rod is provided with an operating part, which is an annular notch 5011. The bottom of the core rod is provided with an insertion hole 5012. The main body of the pen refill holder is cylindrical and has a first annular sealing ring 5023 on its circumference. One end of the pen refill holder is provided with an insertion rod 5021, and the other end is provided with an elastic clamp 5022 with a side opening. The pen refill 505 is clamped in the elastic clamp. One end of the pen refill protective sleeve is open, with an inner hole forming an internal hole that slides and seals with the main body of the pen refill holder and the first annular sealing ring. The other end of the pen refill protective sleeve has a through hole that slides and fits with the refill rod. The bottom of the refill rod extends into the through hole and is inserted and fixed with the insertion rod of the pen refill holder. In the initial state, the pen refill clamped by the pen refill holder is located inside the pen refill protective sleeve. A second annular sealing ring 5031 is provided on the outer diameter of the pen refill protective sleeve near the open end. The rotating refill bracket has stepped grooves 401 evenly distributed on its circumference that slide and fit with the refill rod assembly. The stepped grooves include a refill rod groove 4011 corresponding to the sliding of the refill rod, a protective sleeve groove 4012 corresponding to the sliding of the pen refill protective sleeve, and a sealing ring groove 4013 corresponding to the sliding of the second annular sealing ring. A spring is located in the protective sleeve groove, with one end of the spring limited to the step between the protective sleeve groove and the refill rod groove, and the other end of the spring elastically pressing against the through hole end of the pen refill protective sleeve.

[0029] The pen body 3 has an elongated groove 301 along its axial direction on the outer side. The groove has evenly spaced teeth on both sides and a sliding button 6 is mounted on it. When the button is at the top of the groove, its inner end has an overlapping part that alternately engages with the top operating part of the core rod 501 of the core rod assembly 5 as the core support 4 rotates. This overlapping part is an elastic block 601 with a deformation groove 604 in the center. Limiting grooves 603 engage with the sides of the groove. Below the limiting grooves are elastic buckles 602 that elastically engage with the teeth on both sides of the groove. The engagement of the elastic buckles with the teeth creates a self-locking effect after the button slides into position, requiring external force to unlock it. The inner end of the elastic block forms an arc-shaped recess 605 that matches the annular recess 5011 of the operating part; the inner hole of the pen body is provided with a limiting flange 304 that axially limits the operating part at the top of the core rod assembly that does not overlap with the inner end of the sliding button, and the limiting flange matches the aforementioned annular recess.

[0030] Based on the above structure, when the rotating core support 4 rotates to the point where the bottom of the stepped slide 401 is opposite to the core outlet hole 102 of the pen tip 1, the top operating part of the core rod 501 in the stepped slide 301 overlaps with the inner end of the sliding button 6 at the top of the elongated slide 301. At this time, under the action of the spring 504, the pen tip protective sleeve 503 extends into the core outlet hole and forms a sliding seal with the core outlet hole through the second annular sealing ring 5031. At the same time as the pen tip protective sleeve moves, it pulls the pen tip holder 502 and the core rod 501 to slide synchronously. That is, the core rod drives the sliding button to slide along the elongated slide 301 for the same distance (the same distance as the pen tip protective sleeve). Under the action of the corresponding spring, the open end of the remaining pen tip protective sleeves abuts against the inner end of the pen tip to form a planar seal, that is, to seal the pen tip inside the pen tip protective sleeve. When the core outlet hole does not extend out of the pen tip 505, the end of the pen tip is fitted with the sealing end cap 2, that is, a sealing ring is provided at the fitting point, to seal the corresponding pen tip inside the core outlet hole. When the pen refill is needed, the aforementioned slider continues to slide along the bottom of the elongated groove. The pen refill moves the refill rod, which in turn moves the refill holder and the pen refill towards the refill outlet hole in the pen tip until the refill extends out of the outlet hole. The diameter of the pen tip's outlet hole is designed to match the outer diameter of the pen refill, ensuring a stable and reliable refill extension. When the slider returns to its original position and slides to the top of the elongated groove, the refill rod moves the corresponding refill holder, pushing the refill protective sleeve out of the outlet hole and compressing the spring.

[0031] Furthermore, to facilitate the rotation of the knob 7 to the rotating core support 4, three evenly distributed vertical positioning grooves 303 are provided in the cylindrical hole at the top of the pen body. The circumference of the knob is provided with spring grooves 702 that alternately face each positioning groove when rotating. A tension spring and a ball bearing 703 are provided in the spring groove. When the spring groove faces the positioning groove, the ball bearing is partially exposed in the spring groove under the action of the tension spring and cooperates with the positioning groove to form an elastic locking state. In this elastic locking state, the annular notch 5011 of one of the core rods 501 of the rotating core support overlaps with the arc-shaped notch 605 at the inner end of the sliding knob 6.

[0032] Furthermore, the insertion hole 5012 of the core rod 501 is replaced with a threaded hole, and the insertion rod 5021 of the pen refill holder 502 is replaced with a screw rod, which can also realize the connection between the core rod and the pen refill holder, and can adjust the length of the core rod and the pen refill holder to meet the actual installation requirements.

[0033] The multi-color refill makeup pen is used as follows: When the makeup pen needs to be used, remove the sealing end cap 2, slide the slider 6 towards the pen tip 1, the slider drives the refill rod 501, the refill rod pushes the pen tip holder 502 and the pen tip 505 towards the pen tip's lead outlet hole 102 until the pen tip extends out of the lead outlet hole. The slider relies on the elastic buckle 602 on the inner side to elastically engage with the teeth on both sides of the elongated groove 301, thereby achieving a position holding effect. At this time, the pen tip can be used normally. When it is necessary to switch the pen tip, slide the slider to the top of the elongated groove. During the sliding process, the slider drives the refill rod and the pen tip holder. The pen tip holder drives the pen tip to extend into the pen tip protective sleeve 503, and the pen tip holder drives the pen tip protective sleeve to disengage from the pen tip's lead outlet hole and return to the protective sleeve groove 5012. At this point, rotating the cap 8 causes the knob 7 and the core support to rotate until the ball bearing 703 in the circumferential spring groove and the other positioning groove 303 in the cylindrical hole at the top of the pen body 3 are locked together. This completes one switching operation. The other pen refill assembly 5 is aligned with the pen tip's core outlet hole. Under the action of the spring 504 in the pen refill assembly, the open end of the pen refill protective sleeve extends into the core outlet hole and forms a seal with the core outlet hole through the second annular sealing ring 5031. Simultaneously, as the pen refill protective sleeve slides, it drives the pen refill holder and the core rod to slide the same distance. The core rod drives the sliding knob to slide the same distance along the long strip groove. If the end cap 2 is connected to the pen tip, it provides effective sealing protection for the pen refill. If the end cap is removed and the sliding knob is further slid, the pen refill can be extended out of the pen tip's core outlet hole for use.

[0034] The above description is intended to illustrate the technical means of this utility model and is not intended to limit the technical scope of this utility model. Any obvious improvements or substitutions made to this utility model by those skilled in the art based on existing common knowledge also fall within the protection scope of the claims of this utility model.

Claims

1. A multi-color inner core makeup pen, the makeup pen comprising a pen shell and a pen core mechanism, the pen shell comprising a pen tip (1) and a pen body (3), the pen tip being fixed to the bottom of the pen body and having a core outlet hole (102) inside the pen tip, the pen core mechanism comprising a rotating core support (4) rotatably placed in the inner hole of the pen body, a core rod assembly (5) evenly distributed on the circumference of the rotating core support and slidably engaged with the rotating core support axially, a knob (7) positioned at the top of the pen body to drive the rotating core support to rotate; the core rod assembly having an operating part at the top and a pen core (505) fixed at the bottom, and the outer edge of the pen body along the... The pen body is provided with an elongated groove (301) along its axial direction, and a sliding button (6) that slides in cooperation with the elongated groove; when the sliding button is located at the top of the elongated groove, the inner end of the sliding button is provided with an overlapping part that alternately overlaps with the top operating part of the core rod assembly when the core rod bracket rotates, and the inner hole of the pen body is provided with a limiting flange (304) that axially limits the operating part of the top of the core rod assembly that does not overlap with the inner end of the sliding button; when the sliding button overlaps with the operating part of the corresponding core rod assembly, the pen core of the core rod assembly is aligned with the core outlet hole of the pen tip; characterized in that The core rod assembly (5) includes a core rod (501), a pen refill holder (502), and a pen refill protective sleeve (503). The core rod has an operating part at its top and an insertion hole (5012) at its bottom. The pen refill holder has a cylindrical body with a first annular sealing ring (5023) on its circumference. One end of the pen refill holder has an insertion rod (5021), and the other end holds a pen refill (505). One end of the pen refill protective sleeve is open, and an inner hole is formed inside that slides and seals with the body of the pen refill holder and the first annular sealing ring. The other end of the pen refill protective sleeve has a through hole that slides with the core rod. The bottom of the core rod extends into the through hole and is inserted and fixed with the insertion rod of the pen refill holder. The outer diameter of the pen refill protective sleeve near the open end has a second annular sealing ring (5031). The rotating core bracket has stepped grooves (401) that slide with the core rod assembly evenly distributed on its circumference. A spring (504) for connecting the core rod is provided in the slide groove. One end of the spring is limited to a step of the stepped slide groove, and the other end of the spring elastically abuts against the through hole end of the pen refill protective sleeve. When the rotating core bracket rotates to the bottom of the stepped slide groove and is opposite to the core outlet hole (102) of the pen tip (1), the corresponding pen refill protective sleeve extends into the core outlet hole under the action of the spring and forms a sliding seal with the core outlet hole through the second annular sealing ring. The open end of the remaining pen refill protective sleeve abuts against the inner end of the pen tip under the action of the spring to form a planar seal. When the core outlet hole does not extend out of the pen refill, the end of the pen tip is fitted with a sealing end cap (2) to form a seal on the corresponding pen refill in the core outlet hole. When the sliding button drives the core rod to slide to the top of the long strip slide groove, the core rod drives the corresponding pen refill holder, and the pen refill holder drives the pen refill protective sleeve to disengage from the core outlet hole and compress the spring.

2. The multi-color inner core makeup pen according to claim 1, characterized in that... The stepped groove (401) of the rotating core bracket (4) includes a core rod groove (4011) corresponding to the sliding of the core rod (501), a protective sleeve groove (4012) corresponding to the sliding of the pen refill protective sleeve (503), and a sealing ring groove (4013) corresponding to the sliding of the second annular sealing ring (5031). The spring is located in the protective sleeve groove, one end of the spring is limited to the step between the protective sleeve groove and the core rod groove, and the other end of the spring elastically abuts against the through hole end of the pen refill protective sleeve. The orifice diameter of the core outlet hole (102) of the pen tip (1) matches the outer diameter of the pen refill (505).

3. The multi-color inner core makeup pen according to claim 1, characterized in that... The inner end of the sliding button (6) has an elastic locking block (601), the middle part of the elastic locking block has a deformation groove (604), and the two sides are provided with limiting buckle grooves (603) that cooperate with the two sides of the long strip sliding groove (301). The inner end of the elastic locking block forms an arc-shaped notch (605). The operating part at the top of the core rod (501) is an annular notch (5011) that cooperates with the arc-shaped notch. The limiting flange (304) of the inner hole of the pen body (3) is adapted to the annular notch.

4. The multi-color inner core makeup pen according to claim 3, characterized in that... The elastic latch (601) of the sliding button (6) is provided with elastic buckles (602) on both sides, and the long strip groove (301) of the pen body (3) is provided with teeth that elastically engage with the elastic buckles on both sides.

5. The multi-color inner core makeup pen according to claim 1, characterized in that... At least one annular groove (302) is provided in the cylindrical hole at the top of the pen body (3), and an annular rib (701) is provided on the circumference of the knob (7) to cooperate with the annular groove. The knob and the pen body form a positioning rotation through the cooperation of the annular rib and the annular groove.

6. The multi-color inner core makeup pen according to claim 5, characterized in that... The cylindrical hole at the top of the pen body (3) is provided with positioning grooves (303) arranged along the annular inner wall, corresponding to the number of core rods (501) in the rotating core bracket (4). The circumferential surface of the knob (7) is provided with spring grooves (702) that alternately face each positioning groove when rotating. A tension spring and a ball (703) are provided in the spring groove. When the spring groove faces the positioning groove, the ball is partially exposed in the spring groove under the action of the tension spring and cooperates with the positioning groove to form an elastic locking state. In this elastic locking state, the operating part of one of the core rods of the rotating core bracket and the overlapping part of the sliding knob (6) form an overlapping cooperation.

7. The multi-color inner core makeup pen according to claim 1, characterized in that... The end of the pen refill holder (502) is provided with a side-opening elastic clamp (5022), and the pen refill (505) is clamped in the elastic clamp.

8. The multi-color inner core makeup pen according to claim 1, characterized in that... The insertion hole (5012) of the core rod (501) is replaced with a threaded hole, and the insertion rod (5021) of the pen refill holder (502) is replaced with a screw.

9. The multi-color inner core makeup pen according to claim 1, characterized in that... The bottom of the pen body (3) is an irregular opening (305), and at least one groove (306) is provided inside the irregular opening. One end of the pen tip (1) is pointed, and the other end is provided with an irregular head (101) that cooperates with the irregular opening. The irregular head is provided with a rib (103) that cooperates with the groove. That is, the pen body and the pen tip are fixed together by the groove and the rib.

10. The multi-color inner core makeup pen according to claim 1, characterized in that... The knob (7) has a ring-shaped array of teeth (704) on its circumference, and a knob cap (8) is sleeved on the outside of the knob and is in an interference fit with the teeth.

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