A refillable eyeliner

Abstract

This utility model relates to an eyeliner pencil. A replaceable eyeliner pencil includes a barrel and a refill inside a cap. The barrel comprises an upper barrel and a lower barrel, with an upper cavity formed in the upper barrel and a lower cavity formed in the lower barrel. The upper and lower cavities form a receiving cavity to accommodate the refill. The diameter d of the receiving cavity at the intersection of the upper and lower cavities is variable; when d is at its minimum, it is an interference fit with the outer diameter of the refill; when d is at its maximum, it is a clearance fit with the outer diameter of the refill. This utility model provides a replaceable eyeliner pencil with a simple structure and convenient operation, allowing replacement using the refill's own weight. It solves the technical problems of existing eyeliner pencils where refill replacement is complex, inconvenient, and prone to smudging.

Description

Technical Field

[0001] This utility model relates to an eyeliner, and more particularly to a replaceable eyeliner. Background Technology

[0002] Eyeliner is a type of makeup product used to enhance and accentuate the eye makeup, making the eyes appear more vibrant. Currently, eyeliners come in two types: liquid eyeliner, which stores liquid eyeliner in the tube and has a tip at the end to control the flow of the liquid, and solid eyeliner, which contains a retractable solid gel in the tube.

[0003] Pen refills, whether storing liquids or solids, need to be replaced after use. Existing patent documents also mention such replacement structures, such as the Chinese patent "Dual-ended Replaceable Eyeliner Pen (CN 218832189 U)," which includes a pen tube with intermediate sleeves fixed to the inner walls of both ends. Each intermediate sleeve contains a detachable pen tip assembly. The pen tip assembly includes a pen body with an annular limiting groove on its outer wall and a central protrusion on the inner wall of the intermediate sleeve. The pen body is inserted into the intermediate sleeve so that the central protrusion is positioned within the limiting groove. The two sides of the central protrusion are inclined surfaces so that the pen body can be pulled out under external force. The front section of the pen body has a placement cavity for sliding the solidified paste, and the pen body contains a telescopic component for extending and retracting the solidified paste. However, this structure is relatively complex and requires forced removal, which can easily result in eyeliner ink getting on one's body, making it time-consuming and laborious. Summary of the Invention

[0004] This invention provides a replaceable eyeliner pen with a simple structure and convenient operation, which can be replaced by the weight of the pen tip itself; it solves the technical problems of complex pen tip replacement structure, inconvenient operation, and easy smudging of users in the prior art.

[0005] The above-mentioned technical problem of this utility model is solved by the following technical solution: a replaceable eyeliner pen, including a pen barrel, and a pen core is provided in the pen cap. The pen barrel includes an upper pen barrel and a lower pen barrel. An upper cavity is formed in the upper pen barrel, and a lower cavity is formed in the lower pen barrel. The upper cavity and the lower cavity form a receiving cavity to accommodate the pen core. The diameter d of the receiving cavity at the intersection of the upper cavity and the lower cavity is variable. When d is at its minimum, it is in an interference fit with the outer diameter of the pen core. When d is at its maximum, it is in a clearance fit with the outer diameter of the pen core. The pen refill structure is a conventional one. After the refill is placed in the receiving cavity, the relative positions of the upper and lower pen barrels are changed, altering the diameter d at the intersection of the upper and lower cavities. When the upper and lower cavities are not perfectly aligned, the value of d decreases, thus providing an interference fit with the pen refill and preventing it from falling out. When the pen refill is used up and needs to be replaced, the relative positions of the upper and lower pen barrels are changed again, increasing the value of d and providing a gap fit with the pen refill. With the refill no longer restrained, it can be easily removed from the receiving cavity by gravity. The operation is simple and convenient, and it won't make the user dirty, saving time and effort.

[0006] Preferably, the upper and lower cavities are arranged eccentrically. In this eccentric arrangement, the d-value is largest when the center lines of the two cavities coincide, and the d-value begins to decrease when they are eccentric, gradually securing the pen refill.

[0007] Preferably, a shoulder is provided at the junction of the upper and lower pen barrels. The axial relative positions of the upper and lower pen barrels are fixed, and the circumferential relative rotation of the upper and lower pen barrels changes the size of d. The shoulder can form a stop and positioning function, and the two will not move in the axial direction. By rotating, the relative position of the center lines of the upper and lower cavities is changed, achieving eccentricity or coaxiality, thereby controlling the size of d.

[0008] Preferably, the outer circumferential surface of the upper pen barrel has a groove, and the inner wall of the lower pen barrel has a protrusion. The groove and the protrusion are located in the same plane and cooperate with each other. The groove and the protrusion limit the axial position of the upper and lower pen barrels, so that they will not move axially. The lower and upper pen barrels can rotate relative to each other through the cooperation of the protrusion and the groove.

[0009] Preferably, a limiting structure is provided at the junction of the upper and lower pen barrels. This limiting structure allows the diameter d to reach its maximum or minimum after rotating the two barrels 180°.

[0010] Preferably, the limiting structure includes a limiting protrusion and a limiting groove. The limiting protrusion is located on the inner wall of the lower pen barrel, and the outer circumferential surface of the upper pen barrel is provided with an annular limiting groove. The bottom of the limiting groove is formed with two limiting protrusions, and the limiting groove is formed between the two limiting protrusions. After the limiting protrusion passes over the limiting protrusion, it falls into the limiting groove. The undulating sensation during operation allows the operator to perceive that the rotation has reached the correct position.

[0011] Preferably, the end where the upper and lower pen barrels meet is provided with two parallel annular grooves, and the end where the lower pen barrel meets the upper pen barrel is provided with an annular protrusion and a limiting protrusion. The plane of the annular protrusion and the plane of the limiting protrusion are parallel to each other. One annular groove is used for axial positioning rotation, and the other annular groove is used to allow the limiting protrusion to slide inside.

[0012] Preferably, the diameter of the upper cavity is the same as the diameter of the lower cavity, and the diameters of the upper and lower cavities are larger than the diameter of the pen refill.

[0013] Therefore, the replaceable eyeliner of this utility model has the following advantages: by using the eccentrically designed upper and lower cavities, the diameter of the joint between the upper and lower pen barrels is controlled, thereby changing the fit between the joint and the pen tip, allowing the pen tip to fall off freely or be locked in place. The structure is simple and the operation is convenient. Attached Figure Description

[0014] Figure 1 This is a 3D image of a replaceable eyeliner pencil with the lead protruding from the pencil barrel.

[0015] Figure 2 It is a cross-sectional view of the upper and lower pen barrels holding the pen refill in place.

[0016] Figure 3 It is a cross-sectional view of the upper and lower pen barrels with the pen refill released.

[0017] Figure 4 yes Figure 2 Enlarged view of point A.

[0018] Figure 5 yes Figure 3 Enlarged view of point B.

[0019] Figure 6 It is a 3D diagram of the pen barrel.

[0020] Figure 7 It is a 3D diagram of the penholder. Detailed Implementation

[0021] The technical solution of the utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0022] Example: like Figure 1 and 2As shown in Figure 3, a replaceable eyeliner includes a pen barrel containing a refill. The refill has an existing structure and will not be described in detail here. The refill structure is shown in the figure. The refill includes a refill rod 4 for storing or fixing liquid. The refill rod 4 is a cylinder with a uniform diameter, which is also a conventional structure. There is a protrusion 3 on the top of the refill rod 4 for snapping the refill onto the outside of the pen barrel, so that the brush part 2 of the refill is located outside the pen barrel. After the refill is installed inside the pen barrel, the pen cap 1 is put on, which covers the brush part of the refill. The connection and mating structure between the pen cap 1, the pen barrel, and the refill is also commonly used in the prior art. For example, the pen cap 1 is directly snapped onto the outside of the pen barrel, or the pen cap 1 is connected to the pen barrel by threads. These are all possible and will not be described in detail here. This is not part of the technical features of this patent application.

[0023] like Figure 4 and 5 As shown, the pen barrel includes an upper pen barrel 5 and a lower pen barrel 6, both of which are cylindrical. The upper pen barrel 5 has an upper cavity 7 at its center, which is an open cavity at both ends. The lower pen barrel 6 has a lower cavity 8 at its center, which is an open cavity at one end and closed at the other end, enclosing the pen refill. The upper cavity 7 and the lower cavity 8 form a receiving cavity for the pen refill, and the pen refill 4 is inserted from the upper opening of the upper pen barrel 5 and extends into the lower cavity 8. The upper cavity 7 and the lower cavity 8 are eccentrically arranged, and the diameter d of the receiving cavity at the intersection of the upper cavity 7 and the lower cavity 8 is variable. When d is at its minimum, it is an interference fit with the outer diameter of the pen refill 4; when d is at its maximum, it is a clearance fit with the outer diameter of the pen refill 4.

[0024] like Figure 6 and 7 As shown, a shoulder is provided at the junction of the upper pen barrel 5 and the lower pen barrel 6, allowing the upper pen barrel 5 to be inserted into the lower pen barrel 6. The shoulder also prevents axial over-installation during installation. Two parallel annular grooves are provided at the junction of the upper and lower pen barrels. One groove 11 engages with an annular protrusion 10 on the inner wall of the lower pen barrel, limiting the axial position of both and providing a rotational track for relative rotation. The other annular groove is a limiting groove 12, with two limiting protrusions 14 forming limiting slots 13 within the limiting groove 12. These two limiting slots 13 are located on the same diameter. Two limiting protrusions 9 are evenly distributed on the inner wall of the lower pen barrel 6. After rotating 180°, the limiting protrusions 9 engage with the limiting slots 13.

[0025] To use, insert the pen refill into the receiving cavity. The protrusion on the refill engages at the end of the upper pen barrel, at which point the value of d is at its maximum, allowing the refill to move freely within the cavity. Then, rotate the upper or lower pen barrel 180°. The limiting protrusion engages in the limiting slot, causing the upper and lower cavities to become eccentric. At this point, the value of d is at its minimum, and the diameter of the receiving cavity at the intersection of the upper and lower pen barrels decreases, achieving an interference fit and securing the refill. When replacement is needed, rotate the upper or lower pen barrel 180° again, making the upper and lower cavities coaxial. At this point, the value of d is at its maximum, and the refill and receiving cavity have a clearance fit. With the pen tip facing down, the refill will fall out directly due to gravity, preventing soiling the user.

[0026] The specific embodiments described herein are merely illustrative of the concept of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A replaceable eyeliner, comprising a pen barrel and a refill inside a cap, characterized in that: The pen barrel includes an upper pen barrel and a lower pen barrel. An upper cavity is formed inside the upper pen barrel, and a lower cavity is formed inside the lower pen barrel. The upper cavity and the lower cavity form a receiving cavity to accommodate the pen refill. The diameter d of the receiving cavity at the intersection of the upper cavity and the lower cavity is variable. When d is at its minimum, it is an interference fit with the outer diameter of the pen refill. When d is at its maximum, it is a clearance fit with the outer diameter of the pen refill.

2. The replaceable eyeliner according to claim 1, characterized in that: The upper and lower cavities are arranged eccentrically.

3. A replaceable eyeliner according to claim 1, characterized in that: The upper and lower pen barrels are connected by a shoulder. The axial relative positions of the upper and lower pen barrels are fixed, and the circumferential relative rotation of the upper and lower pen barrels changes the value of d.

4. A replaceable eyeliner according to claim 1, 2, or 3, characterized in that: The outer circumferential surface of the upper pen barrel is provided with a groove, and the inner wall of the lower pen barrel is provided with a protrusion. The groove and the protrusion are located in the same plane and cooperate with each other.

5. A replaceable eyeliner according to claim 1, 2, or 3, characterized in that: A limiting structure is provided at the junction of the upper and lower pen barrels.

6. A replaceable eyeliner according to claim 5, characterized in that: The limiting structure includes a limiting protrusion and a limiting groove. The limiting protrusion is located on the inner wall of the lower pen barrel, and the outer circumferential surface of the upper pen barrel is provided with an annular limiting groove. The bottom of the limiting groove is formed with two limiting protrusions, and a limiting groove is formed between the two limiting protrusions.

7. A replaceable eyeliner according to claim 1, 2, or 3, characterized in that: The upper pen barrel and the lower pen barrel are connected at one end with two parallel annular grooves. The lower pen barrel and the upper pen barrel are connected at one end with an annular protrusion and a limiting protrusion. The plane of the annular protrusion and the plane of the limiting protrusion are parallel to each other.

8. A replaceable eyeliner according to claim 1, 2, or 3, characterized in that: The diameter of the upper cavity is the same as the diameter of the lower cavity, and the diameters of the upper and lower cavities are larger than the diameter of the pen refill.

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