Cosmetic pencil structure with self-locking threads

Abstract

The utility model relates to the technical field of cosmetic pencils, in particular to a cosmetic pencil structure with self-locking threads, which comprises a pencil cap, a pencil point seat, a pencil lead seat, a pencil holder, a screw and a pencil lead. The pen cap is installed on the pen holder, the pen point seat is installed in the pen holder, the pen refill seat is installed in the pen point seat, the pen refill is installed in the pen refill seat, the screw rod is installed in the pen holder, and the two ends of the pen point seat are each provided with a self-locking thread structure. By means of optimization design, including the measures of adopting interference assembly and complete loose assembly modes, arranging a bottom supporting three-face open structure, reinforcing supporting ribs and the like, the stability of the refill is remarkably improved, shaking in the using process is reduced, meanwhile, a threaded structure is effectively protected against damage, the service life is prolonged, the assembly process is simplified, and the production cost is reduced. And high efficiency and reliability of the product in use are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of cosmetic brushes, in particular to a cosmetic brush structure with a self-locking thread. Background Art

[0002] With the rapid development of the personal care and beauty industries, cosmetic brushes, as an essential beauty tool, are experiencing increasing frequency of use and demand. Traditional cosmetic brushes typically use a simple threaded connection to adjust the extension of the refill. However, this structure is prone to the following issues over long-term use: thread wear leading to unstable refill fixation, refill movement affecting application precision, and improper assembly that can damage internal components. These issues not only reduce the user experience but also shorten the product's lifespan. Utility Model Content

[0003] (1) Technical problems solved

[0004] In view of the deficiencies in the prior art, the utility model provides a cosmetic pen structure with a self-locking thread.

[0005] (2) Technical solution

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a self-locking threaded cosmetic pen structure, comprising a pen cover, a pen tip holder, a refill holder, a pen barrel, a screw and a refill; the pen cover is installed on the pen barrel, the pen tip holder is installed inside the pen barrel, the refill holder is installed inside the pen tip holder, a refill is installed in the refill holder, the screw is installed in the pen barrel, and both ends of the pen tip holder have self-locking thread structures.

[0007] Furthermore, the present invention is improved in that the self-locking thread structure is fitted with the inner hole of the pen barrel through interference.

[0008] Furthermore, the present invention is improved in that the self-locking thread structure and the screw rod are assembled in a completely loose fit.

[0009] Furthermore, the present invention is improved in that the self-locking thread structure is provided with a bottom supporting three-sided open structure.

[0010] Furthermore, the present invention is improved in that the side holes of the self-locking thread structure are provided with a side core ejection mold mechanism.

[0011] Furthermore, the present invention is improved in that the self-locking thread structure and the inner hole of the pen barrel are matched with each other to form a large arc-shaped support point.

[0012] Furthermore, the present invention is improved in that the bottom support surface of the self-locking thread structure is provided with a reinforcing support rib structure.

[0013] Furthermore, the present invention is improved in that the refill holder is provided with a two-end assembly structure.

[0014] (3) Beneficial effects

[0015] Compared with the existing technology, the utility model provides a self-locking threaded cosmetic pen structure with the following beneficial effects: through optimized design, including the use of interference fit and completely loose fitting, setting a three-sided open structure for bottom support and strengthening support ribs, etc., the stability of the pen core is significantly improved, and the shaking during use is reduced. At the same time, it effectively protects the threaded structure from damage, extends the service life, simplifies the assembly process, and ensures the efficiency and reliability of the product in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 It is a structural diagram of the pen head holder, pen barrel and screw;

[0018] Figure 3 It is a structural diagram of a self-locking thread structure;

[0019] Figure 4 It is a structural diagram of the pen head holder and the side core ejection mold mechanism;

[0020] Figure 5 It is a structural diagram of the pen head base and the large arc-shaped support point;

[0021] Figure 6 It is a structural diagram of the pen head seat and the reinforcing support rib structure;

[0022] Figure 7 It is a structural diagram of a structure that can be assembled at both ends;

[0023] Figure 8 It is a structural diagram of a bottom-supported three-sided open structure;

[0024] Markings in the attached figure: 1. Pen cover; 2. Pen tip holder; 3. Pen refill holder; 4. Pen body; 5. Screw; 6. Pen refill; 7. Large arc-shaped support point; 8. Strengthened support rib structure; 9. Lateral core ejection mold mechanism; 10. Bottom support three-sided open structure; 11. Self-locking thread structure; 12. Two-end assembly structure. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figures 1-8 The utility model is a cosmetic pen structure with a self-locking thread, comprising a pen cover 1, a pen head seat 2, a refill seat 3, a pen barrel 4, a screw 5 and a refill 6; the pen cover 1 is installed on the pen barrel 4, the pen head seat 2 is installed inside the pen barrel 4, the refill seat 3 is installed inside the pen head seat 2, the refill 6 is installed in the refill seat 3, the screw 5 is installed in the pen barrel 4, and both ends of the pen head seat 2 are provided with a self-locking thread structure 11; by arranging self-locking threads at both ends of the pen head seat, the stability of the refill fixation is enhanced to prevent loosening or falling off during use.

[0027] Furthermore, the utility model has the following improvements: the self-locking thread structure 11 is interference-fitted with the inner hole of the pen body 4. When the pen tip holder 2 and the screw 5 are installed in the pen body 4, the radial directions of the two self-locking thread structures 11 on the left and right sides of the pen tip holder 2 can rebound in unison, so that the two self-locking thread structures 11 of the pen tip holder 2 and the screw 5 can achieve a self-locking effect, so that the inner threads of the two self-locking thread structures 11 on the left and right sides and the outer threads of the screw 5 fit more tightly, and the force between the threads is more balanced, thereby reducing the damage to the self-locking thread when the screw 5 is driven up and down, and further effectively protecting the self-locking thread structure 11, thereby reducing the shaking of the pen core 6 during use and increasing stability.

[0028] Furthermore, the utility model is improved in that the self-locking thread structure 11 and the screw 5 are assembled in a completely loose manner. When the screw 5 is installed in the pen head holder 2, the outer shape of the screw 5 and the two left and right self-locking thread structures 11 inside the pen head holder 2 are completely loose, thereby completely avoiding damage to the thread when the screw 5 is assembled, further effectively protecting the self-locking thread structure 11, and increasing the stability of the thread.

[0029] Furthermore, the utility model has improvements in that the self-locking thread structure 11 is provided with a three-sided open structure 10 supporting the bottom, so that the left and right self-locking thread pieces can rebound to the left and right in the same direction and with uniform elastic force. When the screw 5 is screwed to the top and bottom positions, the left and right self-locking thread structures 11 on the pen tip holder 2 can effectively rebound with uniform elastic force, so that the screw 5 can have a stable and clear hysteresis force.

[0030] Furthermore, the utility model has the following improvements: the side holes of the self-locking thread structure 11 are provided with a lateral core-outlet mold mechanism 9, which is beneficial to the integrity and stability of the two self-locking thread structures 11 symmetrical on the left and right sides, and is beneficial to protecting the damage of the self-locking threads on the self-locking thread structure 11, so that the internal threads of the left and right self-locking thread structures 11 and the external threads of the screw 5 fit more tightly, and the force between the threads is more balanced, thereby reducing the damage to the threads when the screw 5 is driven up and down, and further effectively protecting the self-locking thread structure 11, thereby reducing the shaking of the pen core 6 during use and increasing stability.

[0031] Furthermore, the utility model has the following improvements: the self-locking thread structure 11 cooperates with the inner hole of the pen barrel 4 and is provided with a large arc-shaped support point 7. More specifically, the large arc-shaped support point 7 is a large-angle piece. The use of the large arc-shaped support point 7 is conducive to reducing the wear on the inner hole of the pen barrel 4, and the self-locking thread structure 11 rebounds more smoothly. The large-angle piece makes the radial rebound force of the self-locking thread structure 11 more balanced and effective, so that the left and right self-locking thread structures 11 cooperate more closely with the screw 5, further effectively protecting the thread structure, thereby reducing the shaking of the pen core 6 during use and increasing stability.

[0032] Furthermore, the utility model has been improved in that the bottom support surface of the self-locking thread structure 11 is provided with a reinforcing support rib structure 8, which can effectively enhance the structural stability of the left and right self-locking thread structures 11, thereby effectively improving the stability and balance of the radial rebound force of the self-locking thread structure 11, so that the internal threads of the left and right self-locking thread structures 11 and the external threads of the screw 5 fit more tightly, and the force between the threads is more balanced, thereby reducing the damage to the threads when the screw 5 is transmitted up and down, and further effectively protecting the self-locking thread structure 11, thereby reducing the shaking of the pen core 6 during use and increasing stability.

[0033] Furthermore, the utility model is improved in that the refill holder 3 is provided with a two-end assembly structure 12, and the internal structure of the refill holder 3 is the same at the upper and lower ends, so that the refill 6 and the screw 5 can be assembled at both the upper and lower ends of the refill holder 3, which is conducive to the convenience of assembly, thereby effectively avoiding the hidden dangers of loosening of the screw 5 and shaking of the refill 6 caused by the wrong installation of the refill 6, the screw 5 and the refill holder 3, thereby increasing the matching stability between the refill holder 3 and the refill 6 and the screw 5, and the screw 5 can be rotated after being installed in the refill holder 3, and the outer shape of the refill holder 3 and the inner hole of the pen head holder 2 are stagnant. When in use, the pen head is rotated up and down, and the refill holder 3 equipped with the refill 6 can move up and down.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-locking threaded cosmetic pen structure, comprising a pen cap (1), a pen head seat (2), a refill seat (3), a pen body (4), a screw (5) and a refill (6); characterized in that: The pen cap (1) is mounted on the pen shaft (4), the pen head seat (2) is mounted inside the pen shaft (4), the refill seat (3) is mounted inside the pen head seat (2), a refill (6) is mounted inside the refill seat (3), the screw (5) is mounted inside the pen shaft (4), and both ends of the pen head seat (2) are provided with self-locking thread structures (11).

2. A self-locking thread cosmetic pen structure according to claim 1, characterized in that: The self-locking thread structure (11) is interference-fitted with the inner hole of the pen holder (4).

3. A self-locking thread cosmetic pen structure according to claim 2, characterized in that: The self-locking thread structure (11) and the screw rod (5) are assembled in a completely loose fit manner.

4. A self-locking thread cosmetic pen structure according to claim 3, characterized in that: The self-locking thread structure (11) is provided with a bottom supporting three-sided open structure (10).

5. A cosmetic pen structure with self-locking thread according to claim 4, characterized in that: The side hole of the self-locking thread structure (11) is provided with a side core ejection mold mechanism (9).

6. A cosmetic pen structure with self-locking thread according to claim 5, characterized in that: The self-locking thread structure (11) and the inner hole of the pen holder (4) are matched with each other in the outer shape and are provided with a large arc-shaped supporting point (7).

7. A cosmetic pen structure with self-locking thread according to claim 6, characterized in that: A reinforcing support rib structure (8) is provided on the bottom support surface of the self-locking thread structure (11).

8. A cosmetic pen structure with self-locking thread according to claim 7, characterized in that: The refill holder (3) is provided with a two-end assembly structure (12).

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