A retractable pen

Abstract

The utility model relates to a telescopic pen, include: pen holder, pen paste body, tail plug and pen cover, accommodate the cavity that is set up on pen holder, pen paste body and tail plug set up in accommodate the cavity respectively, the first end of pen paste body mobile convex to the first end of accommodating cavity, the outside surface of tail plug and the lateral wall of accommodating cavity mobile abut, and tail plug and the second end of pen paste body abut, cooperate pen cover and set up the ejection part, when needing to use, the user will separate pen cover and pen holder after, can through the ejection part act on the second end of tail plug, and then drive pen paste body to move convex to the outside of accommodating cavity, make the ejection operation of pen paste body quick and convenient, and can adjust the length flexibly, thereby can satisfy the requirement of different pen paste body length when telescopic pen writes or marks, simple and reliable structure, convenient for production at the same time, greatly promoted the practicality and use flexibility of telescopic pen.

Description

Technical Field

[0001] This utility model relates to the field of pen technology, and in particular to a retractable pen. Background Technology

[0002] Paste pencils typically refer to writing or drawing tools with a thick paste-like lead. They are made of wax as the main binder, mixed with pigment powder to form stick or cylindrical solid pigments. By directly applying or rubbing, the wax and pigment mixture can adhere to the surface of paper, wood, etc., to form a color layer. They are characterized by their thick texture and resistance to smudging. Due to their convenience, safety, and rich color selection, they have become a widely used tool from children to professional artists, and are widely used in children's education, art creation, beauty, and industrial marking.

[0003] To improve the durability and hygiene of paste pens, a mechanical structure enables the refill to extend and retract. By reducing the exposed portion of the refill, the probability of breakage and the risk of contamination are reduced. Existing retractable structures for paste pens typically use a threaded adjustment rod connected to the pen barrel. When the adjustment rod is rotated, the refill moves along the axial direction of the pen barrel under the push of the adjustment rod. However, this type of structure has high production requirements, requiring the thread precision to avoid jamming, which makes production difficult. At the same time, because the pen barrel has internal threads, it is difficult to demold after injection molding, resulting in a low yield and significantly increasing production costs. Summary of the Invention

[0004] Therefore, it is necessary to provide a retractable pen.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A retractable pen, comprising:

[0006] The pen barrel has a receiving cavity that extends through both ends of the pen barrel;

[0007] The pen paste is disposed within the receiving cavity, and the first end of the pen paste protrudes movably to the outside of the receiving cavity;

[0008] The tail plug is disposed in the receiving cavity, and the outer surface of the tail plug is in movable contact with the side wall of the receiving cavity, and the first end of the tail plug is in contact with the second end of the pen paste.

[0009] The pen cap has a first end fitted onto the pen barrel, which closes the first end of the pen paste. The second end of the pen cap has an ejector. When the pen cap is separated from the pen barrel, the ejector is inserted into the receiving cavity and acts on the second end of the tail plug to move the pen paste and protrude to the outside of the receiving cavity.

[0010] In one embodiment, an abutment protrusion is provided on the outer surface of the tail plug, and the tail plug moves against the side wall of the receiving cavity through the abutment protrusion.

[0011] In one embodiment, the first end of the ejector is connected to the pen cap, the second end of the ejector is inserted into the receiving cavity, and the width of the ejector gradually decreases along the direction from the first end to the second end.

[0012] In one embodiment, the ejector is integrally formed with the pen cap.

[0013] In one embodiment, the cross-sectional shape of the receiving cavity is circular, and the cross-sectional shapes of the tail plug and the pen paste are adapted to the cross-sectional shape of the receiving cavity.

[0014] In one embodiment, the ejector includes an ejector rod and a plurality of ejector tabs. The ejector rod is connected to the second end of the pen cap, and each ejector tab is evenly distributed circumferentially on the outer surface of the ejector rod, and each ejector tab is connected to the second end of the pen cap.

[0015] In one embodiment, the ejector rod and each of the ejector plates are integrally formed.

[0016] In one embodiment, the first end of the pen paste protrudes movably to the first end of the receiving cavity, and the width of the second end of the receiving cavity is greater than the width of the first end of the receiving cavity.

[0017] In one embodiment, a retrieval groove is provided on the side wall of the receiving cavity, and the retrieval groove is located at the second end of the receiving cavity.

[0018] In one embodiment, a weight-reducing groove is provided on the second end of the tail plug.

[0019] The beneficial effects of this utility model are as follows: The telescopic pen provided by this utility model has a receiving cavity on the pen barrel, in which the pen paste and the tail plug are respectively set. The first end of the pen paste protrudes to the first end of the receiving cavity, and the outer surface of the tail plug abuts against the side wall of the receiving cavity. The tail plug also abuts against the second end of the pen paste. With the help of an ejector on the pen cap, when it is needed, the user can separate the pen cap from the pen barrel, and the ejector can act on the second end of the tail plug, thereby moving the pen paste to protrude to the outside of the receiving cavity. This makes the ejection of the pen paste quick and convenient, and the length can be flexibly adjusted, so as to meet the requirements of different pen paste lengths when writing or marking with the telescopic pen. The structure is simple and reliable, easy to produce, and greatly improves the practicality and flexibility of the telescopic pen. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a retractable pen according to one embodiment;

[0022] Figure 2 This is a cross-sectional structural diagram of a retractable pen according to one embodiment;

[0023] Figure 3 An exploded view of the three-dimensional structure of a retractable pen according to one embodiment;

[0024] Figure 4 An exploded view of the three-dimensional structure of a retractable pen according to one embodiment;

[0025] Figure 5 This is a three-dimensional exploded view of a retractable pen according to one embodiment.

[0026] In the attached diagram, 10 is a telescopic pen; 100 is a pen barrel; 110 is a receiving cavity; 120 is a retrieval slot; 200 is pen paste; 300 is a tail plug; 310 is an abutment protrusion; 320 is a weight-reducing groove; 400 is a pen cap; 500 is an ejector; 510 is an ejector rod; and 520 is an ejector plate. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0028] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0029] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a retractable pen 10 includes: a pen barrel 100, a pen paste 200, a tail plug 300, and a pen cap 400. The pen barrel 100 has a receiving cavity 110 extending through both ends of the pen barrel 100. The pen paste 200 is disposed within the receiving cavity 110, with its first end protruding movably to the outside of the receiving cavity 110. The tail plug 300 is disposed within the receiving cavity 110, and its outer surface movably abuts against the side wall of the receiving cavity 110. The first end of the tail plug 300 abuts against the second end of the pen paste 200. The first end of the pen cap 400 is sleeved on the pen barrel 100. The pen cap 400 is configured to close the first end of the pen paste 200. The second end of the pen cap 400 is provided with an ejector 500. When the pen cap 400 is separated from the pen barrel 100, the ejector 500 is used to insert into the receiving cavity 110 and act on the second end of the tail plug 300 to drive the pen paste 200 to move and protrude to the outside of the receiving cavity 110.

[0030] In this embodiment, a receiving cavity 110 is provided on the pen barrel 100. The pen paste 200 and the end cap 300 are respectively disposed in the receiving cavity 110. The first end of the pen paste 200 protrudes movably to the first end of the receiving cavity 110. The outer surface of the end cap 300 abuts against the side wall of the receiving cavity 110, and the end cap 300 abuts against the second end of the pen paste 200. This provides stable support for the pen paste 200, ensuring that the pen paste 200 will not shake arbitrarily during use, thus guaranteeing the accuracy of writing or marking. At the same time, the movable abutment method also ensures that the end cap 300... Under the action of the ejector 500, the pen tube moves smoothly, which can drive the first end of the pen tube 200 to protrude to the first end of the receiving cavity 110, thus achieving a coordinated unity of structural stability and functional flexibility. With the ejector 500 provided on the pen cap 400, the pen cap 400 can effectively protect and seal the first end of the pen tube 200, preventing the exposed part of the pen tube 200 from breaking or becoming contaminated, and extending the service life of the pen tube 200. At the same time, when the pen cap 400 is fitted on the pen barrel 100, it can also press part of the pen tube 200 back into the receiving cavity 110.

[0031] In this embodiment, when the telescopic pen 10 is needed, after separating the pen cap 400 from the pen barrel 100, the ejector 500 acts on the second end of the tail plug 300, which can drive the pen paste 200 to move and protrude to the outside of the receiving cavity 110. This makes the ejection operation of the pen paste 200 quick and convenient, and the length can be flexibly adjusted, so as to meet the requirements of different pen paste 200 lengths when writing or marking with the telescopic pen 10. The structure is simple and reliable, easy to produce, and greatly improves the practicality and flexibility of the telescopic pen 10.

[0032] It is worth noting that retractable pens can be cosmetic gel pens, such as eyeliner gel pens, lip liner gel pens, concealer gel pens, or contour gel pens. Retractable pens can also be stationery pens, such as crayons, oil pastel pens, water-soluble powder pens, or solid glue pens. Retractable pens can also be industrial gel pens, such as lubricating gel pens, marking gel pens, or conductive gel pens.

[0033] In one embodiment, such as Figure 3 As shown, an abutment protrusion 310 is provided on the outer surface of the tail plug 300, and the tail plug 300 abuts against the side wall of the receiving cavity 110 through the abutment protrusion 310. Specifically, by providing the abutment protrusion 310 on the outer surface of the tail plug 300, the abutment protrusion 310 is an arc-shaped protrusion, which can effectively reduce the contact area between the tail plug 300 and the side wall of the receiving cavity 110. During the movement of the tail plug 300 in the receiving cavity 110, the abutment protrusion 310 can contact the side wall of the receiving cavity 110 in a point or line form, which can greatly reduce the friction. This makes it smoother and less strenuous when the tail plug 300 is pushed by the ejector 500 on the pen cap 400, thereby moving the pen paste 200. At the same time, it can also ensure that there is still sufficient connection stability between the tail plug 300 and the side wall of the receiving cavity 110, which can provide stable support for the pen paste 200.

[0034] In one embodiment, the first end of the ejector 500 is connected to the pen cap 400, and the second end of the ejector 500 is inserted into the receiving cavity 110. The width of the ejector 500 gradually decreases along the direction from the first end to the second end. Specifically, by setting the width of the second end of the ejector 500 to be smaller than the width of the first end, the ejector 500 can be guided into the receiving cavity 110 more easily, facilitating its insertion and reducing operational difficulty. Simultaneously, it reduces the contact area between the ejector 500 and the end cap 300, allowing for more precise control of the force applied to the end cap 300. This makes it easier to eject the first end of the pen paste 200 by applying force to the end cap 300 through the ejector 500.

[0035] In one embodiment, such as Figure 1 and Figure 2 As shown, the ejector 500 and the pen cap 400 are integrally formed. Specifically, the integral injection molding of the ejector 500 and the pen cap 400 reduces production steps and assembly errors, improves production efficiency and quality stability, and the integrally formed ejector 500 and pen cap 400 can better distribute stress, improve the stability of the overall structure, have good mechanical strength, and extend service life.

[0036] In one embodiment, the cross-sectional shape of the receiving cavity 110 is circular, and the cross-sectional shapes of the tail plug 300 and the pen paste 200 are adapted to the cross-sectional shape of the receiving cavity 110. Specifically, by setting the cross-sectional shapes of the receiving cavity 110, the tail plug 300, and the pen paste 200 to be circular, the movement of the tail plug 300 and the pen paste 200 within the receiving cavity 110 can be smoother. When the tail plug 300 and the pen paste 200 are pushed by the ejector 500, they can move freely axially within the receiving cavity 110, reducing friction and jamming caused by shape mismatch.

[0037] In one embodiment, such as Figure 3 As shown, the ejector 500 includes an ejector rod 510 and multiple ejector plates 520. The ejector rod 510 is connected to the second end of the pen cap 400. Each ejector plate 520 is evenly distributed circumferentially on the outer surface of the ejector rod 510, and each ejector plate 520 is connected to the second end of the pen cap 400. Specifically, the ejector 500 structure formed by the evenly distributed circumferential ejector plates 520 on the outer surface of the ejector rod 510 makes the ejector 500 structure more compact. This not only reduces material usage and production costs but also makes the overall volume of the ejector 500 smaller, making it easier to carry and store. Furthermore, the evenly distributed circumferential distribution of the multiple ejector plates 520 enhances the contact area and force distribution uniformity between the ejector 500 and the tail plug 300, thereby ensuring the ejection action of the ejector 500.

[0038] It is worth noting that the ejector structure, which is formed by multiple ejector plates evenly distributed circumferentially on the outer surface of the ejector rod and integrated with the pen cap, reduces the internal space of the pen cap compared to an ejector structure that is hollow and connected to the inside of the pen cap. This reduces the space at the first end of the pen cap that seals the pen paste. Due to the reduced space, the airflow inside the pen cap is restricted, which limits the environmental conditions for the wax in the pen paste to evaporate. This slows down the evaporation rate of the wax in the pen paste and reduces the amount of wax that evaporates. This helps maintain the color and hardness of the pen paste and ensures the quality stability of the pen paste during long-term storage and use, thereby improving the quality reliability and durability of the retractable pen.

[0039] In one embodiment, such as Figure 3 As shown, the ejector rod 510 and each of the ejector plates 520 are integrally molded. Specifically, the integral injection molding of the ejector rod 510 and each ejector plate 520 can reduce production steps and assembly errors, improve production efficiency and quality stability. At the same time, the integrally molded ejector rod 510 and each ejector plate 520 can better disperse stress, improve the stability of the overall structure, have better mechanical strength, and extend service life.

[0040] In one embodiment, such as Figure 2 As shown, the first end of the pen paste 200 protrudes movably to the first end of the receiving cavity 110, and the width of the second end of the receiving cavity 110 is greater than the width of the first end of the receiving cavity 110. Specifically, by making the width of the second end of the receiving cavity 110 greater than the width of the first end of the receiving cavity 110, the wider second end can provide more space for the ejector 500 to be inserted, making it easier to insert the ejector 500 into the receiving cavity 110, reducing the difficulty of operation, and thus making it easier to eject the first end of the pen paste 200 by the ejector 500 acting on the tail plug 300.

[0041] In one embodiment, such as Figure 2 and Figure 3 As shown, a retrieval groove 120 is provided on the side wall of the receiving cavity 110, and the retrieval groove 120 is located on the second end of the receiving cavity 110. Specifically, the number of retrieval grooves 120 is set to multiple, and each retrieval groove 120 is evenly distributed on the second end of the receiving cavity 110. The retrieval groove 120 provides operating space, making it convenient for the operator to remove the tail cap 300 from the receiving cavity 110, facilitating the replacement of the pen paste 200, and providing convenience for the replacement of components of the retractable pen 10.

[0042] In one embodiment, such as Figure 2 and Figure 3 As shown, a weight-reducing groove 320 is provided on the second end of the tail plug 300. Specifically, by providing a weight-reducing groove 320 on the tail plug 300, the weight of the tail plug 300 is effectively reduced, which can reduce the overall weight of the telescopic pen 10. It can also reduce the consumption of raw materials without affecting the normal use of the telescopic pen 10. At the same time, it helps to adjust the center of gravity of the telescopic pen 10, so that the center of gravity of the telescopic pen 10 is closer to the hand holding position, improving the stability and accuracy of operation, which is beneficial for users to write or mark.

[0043] Compared with the prior art, the present invention has at least the following advantages:

[0044] This utility model provides a telescopic pen with a receiving cavity on the pen barrel. The pen paste and the end cap are respectively disposed in the receiving cavity. The first end of the pen paste protrudes movably to the first end of the receiving cavity, and the outer surface of the end cap abuts against the side wall of the receiving cavity. The end cap also abuts against the second end of the pen paste. A push-out component is provided on the pen cap. When needed, the user separates the pen cap from the pen barrel, and the push-out component acts on the second end of the end cap, thereby moving the pen paste to protrude to the outside of the receiving cavity. This makes the ejection of the pen paste quick and convenient, and the length can be flexibly adjusted to meet the requirements of different pen paste lengths when writing or marking with the telescopic pen. The structure is simple and reliable, easy to manufacture, and greatly improves the practicality and flexibility of the telescopic pen.

[0045] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A retractable pen, characterized in that, include: The pen barrel has a receiving cavity that extends through both ends of the pen barrel; The pen paste is disposed within the receiving cavity, and the first end of the pen paste protrudes movably to the outside of the receiving cavity; The tail plug is disposed in the receiving cavity, and the outer surface of the tail plug is in movable contact with the side wall of the receiving cavity, and the first end of the tail plug is in contact with the second end of the pen paste. The pen cap has a first end fitted onto the pen barrel, which closes the first end of the pen paste. The second end of the pen cap has an ejector. When the pen cap is separated from the pen barrel, the ejector is inserted into the receiving cavity and acts on the second end of the tail plug to move the pen paste and protrude to the outside of the receiving cavity.

2. The telescopic pen according to claim 1, characterized in that, The outer surface of the tail plug is provided with an abutment protrusion, and the tail plug moves against the side wall of the receiving cavity through the abutment protrusion.

3. The retractable pen according to claim 1, characterized in that, The first end of the ejector is connected to the pen cap, and the second end of the ejector is used to be inserted into the receiving cavity. The width of the ejector gradually decreases along the direction from the first end to the second end.

4. The telescopic pen according to claim 1, characterized in that, The ejector is integrally formed with the pen cap.

5. The telescopic pen according to claim 1, characterized in that, The cross-sectional shape of the receiving cavity is circular, and the cross-sectional shapes of the tail plug and the pen paste are adapted to the cross-sectional shape of the receiving cavity.

6. The retractable pen according to claim 1, characterized in that, The ejector includes an ejector rod and a plurality of ejector tabs. The ejector rod is connected to the second end of the pen cap. Each ejector tab is evenly distributed circumferentially on the outer surface of the ejector rod, and each ejector tab is connected to the second end of the pen cap.

7. The retractable pen according to claim 6, characterized in that, The ejector rod and each ejector plate are integrally formed.

8. The telescopic pen according to claim 1, characterized in that, The first end of the pen paste protrudes movably to the first end of the receiving cavity, and the width of the second end of the receiving cavity is greater than the width of the first end of the receiving cavity.

9. The telescopic pen according to claim 8, characterized in that, A retrieval groove is provided on the side wall of the receiving cavity, and the retrieval groove is located at the second end of the receiving cavity.

10. The retractable pen according to claim 1, characterized in that, A weight-reducing groove is provided on the second end of the tail plug.

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