Propelling pencil
By incorporating a connecting tube and clamping assembly into the mechanical pencil, and utilizing elastic elements to provide support, the problem of easily broken leads is solved, ensuring continuous and efficient writing.
Patent Information
- Application Number
- CN202520635830.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-07
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-04-07
Smart Images
Figure CN223934430U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of school stationery technology, specifically to a mechanical pencil. Background Technology
[0002] Pencils can be categorized into traditional pencils and mechanical pencils based on their manufacturing process. Mechanical pencils offer significant advantages over traditional pencils in terms of convenience, economy, environmental friendliness, and smooth writing. However, the leads in mechanical pencils are generally thinner, making them prone to breakage during writing. This necessitates frequent lead ejection, which significantly impacts writing efficiency. Utility Model Content
[0003] The purpose of this invention is to solve the problem that the lead of existing mechanical pencils is prone to breakage during writing. Without changing the quality of the lead, this invention provides a mechanical pencil that has the function of preventing lead breakage, thereby ensuring writing efficiency.
[0004] To achieve the above objectives, this utility model provides a mechanical pencil, comprising a pencil barrel, a connecting tube, and a pencil tip connected sequentially from top to bottom. The connecting tube has a first channel extending vertically through the pencil barrel for the lead to extend from the pencil barrel to the pencil tip. At least a portion of the first channel is formed as a tapered section from bottom to top. A clamping assembly is disposed within the first channel. The clamping assembly has a second channel extending vertically through the pencil tip for the lead to pass through. A plurality of clamping portions are formed on the upper part of the clamping assembly. The plurality of clamping portions are evenly and spaced around the lead in a circumferential direction. An elastic element is disposed between the clamping assembly and the pencil tip. The elastic element is used to drive the plurality of clamping portions of the clamping assembly to move upward along the tapered section of the first channel and clamp the lead.
[0005] Preferably, the pen barrel is provided with a refill compartment for accommodating the refill, the lower end of the refill compartment is in contact with the upper end of the clamping assembly, and the upper end of the refill compartment extends out of the upper end of the pen barrel and is provided with a removable pressure cap.
[0006] Preferably, the refill compartment includes a receiving section, a dispensing section, and a refill supply section connected sequentially from top to bottom. The receiving section is used to receive multiple refills, the inner diameter of the refill supply section is set to allow only a single refill to pass through, and the dispensing section is funnel-shaped to allow the refill in the receiving section to enter the refill supply section.
[0007] Preferably, the lower part of the core supply section is provided with a plurality of recesses spaced apart along its circumference.
[0008] Preferably, the receiving section, the leaking section, and the core supply section are integrally formed.
[0009] Preferably, the elastic element is a spring that extends and contracts in the vertical direction, and the pen lead passes through the middle of the spring and extends to the pen tip.
[0010] Preferably, the outside of the connecting tube has a downward-opening connecting groove for the upper end of the pen tip to be inserted, and a threaded structure is provided on the outer wall of the connecting groove for cooperating with the threaded structure on the upper part of the pen tip.
[0011] Preferably, the upper part of the connecting tube is connected to the lower end of the pen barrel by a thread.
[0012] Preferably, the mechanical pencil further includes a grip sleeve, which is fitted over the outside of the connecting tube, with its upper and lower ends extending to cover the connection between the connecting tube and the pencil barrel and the pencil tip.
[0013] Preferably, a pen clip is connected to the upper part of the pen barrel.
[0014] Through the above technical solution, by setting a connecting tube between the pen barrel and the pen tip, and setting a clamping component in the first channel of the connecting tube, the second channel of the clamping component allows the pen lead to pass through. With the help of the elastic element set between the clamping component and the pen tip to provide elastic force, the multiple clamping parts on the upper part of the clamping component achieve clamping of the pen lead under the guiding and limiting action of the tapered section. The mechanical pencil provided by this utility model effectively avoids the problem of the pen lead easily breaking due to lack of support during the transition from the pen barrel to the pen tip, thereby ensuring the continuity of writing and avoiding the problem of writing efficiency being affected by pen lead breakage. Attached Figure Description
[0015] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:
[0016] Figure 1 This is a schematic diagram of the structure of a mechanical pencil provided by this utility model;
[0017] Figure 2 This is a partial exploded view of a mechanical pencil provided by this utility model.
[0018] Explanation of reference numerals in the attached figures
[0019] 10. Pen barrel; 11. Pen refill compartment; 111. Receiving section; 112. Discharge section; 113. Refill supply section; 1131. Notch; 12. Cap; 13. Pen clip; 20. Connecting tube; 21. First channel; 211. Tapered section; 22. Connecting groove; 30. Pen tip; 40. Pen refill; 50. Clamping assembly; 51. Second channel; 52. Clamping part; 60. Spring; 70. Pen grip. Detailed Implementation
[0020] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model. Example
[0021] like Figure 1 and Figure 2 As shown, this utility model provides a mechanical pencil, which includes a pencil barrel 10, a connecting tube 20, and a pencil tip 30 connected sequentially from top to bottom. The connecting tube 20 has a first channel 21 extending in the vertical direction for the lead 40 to extend from the pencil barrel 10 to the pencil tip 30. At least a portion of the first channel 21 is formed as a tapered section 211 from bottom to top. A clamping assembly 50 is provided in the first channel 21. The clamping assembly 50 has a second channel 51 extending in the vertical direction for the lead 40 to pass through. A plurality of clamping parts 52 are formed on the upper part of the clamping assembly 50. The plurality of clamping parts 52 are evenly and spaced around the lead 40 in the circumferential direction. An elastic member is provided between the clamping assembly 50 and the pencil tip 30. The elastic member is used to drive the plurality of clamping parts 52 of the clamping assembly 50 to move upward along the tapered section 211 of the first channel 21 and clamp the lead 40.
[0022] In the technical solution provided by this utility model, a connecting tube 20 is provided between the pen barrel 10 and the pen tip 30, and a clamping component 50 is provided in the first channel 21 of the connecting tube 20. The second channel 51 of the clamping component 50 allows the lead 40 to pass through. With the help of the elastic member provided between the clamping component 50 and the pen tip 30, elastic force is provided, so that the multiple clamping parts 52 on the upper part of the clamping component 50 clamp the lead 40 under the guiding and limiting action of the tapered section 211. The mechanical pencil provided by this utility model effectively avoids the problem that the lead 40 is prone to breakage due to lack of support during the transition from the pen barrel 10 to the pen tip 30, thereby ensuring the continuity of writing and avoiding the problem of writing efficiency being affected by the breakage of the lead 40.
[0023] In this utility model, the pen barrel 10 is provided with a pen refill compartment 11 for accommodating the pen refill 40. The lower end of the pen refill compartment 11 is in contact with the upper end of the clamping assembly 50. The upper end of the pen refill compartment 11 extends out of the upper end of the pen barrel 10 and is provided with a detachable pressure cap 12.
[0024] It is understandable that the lead compartment 11 is designed to hold a certain number of leads 40 to meet the needs of mechanical pencils for extended use. After all the leads 40 in the lead compartment 11 have been used up, the cap 12 at the top of the lead compartment 11 can be opened to insert more leads 40 into the lead compartment 11. After inserting all leads, the cap 12 can be closed again.
[0025] In some embodiments of this utility model, the refill compartment 11 includes a receiving section 111, a dispensing section 112, and a refill supply section 113 connected sequentially from top to bottom. The receiving section 111 is used to receive multiple refills 40. The inner diameter of the refill supply section 113 is set to allow only a single refill 40 to pass through. The dispensing section 112 is funnel-shaped to allow the refills 40 in the receiving section 111 to enter the refill supply section 113. With the above configuration, when the refills 40 in the refill supply section 113 are used up, the refills 40 in the receiving section 111 can slide down the funnel-shaped dispensing section 112 into the refill supply section 113, ensuring the continuity of refill use.
[0026] Furthermore, in this utility model, the lower part of the core-supplying section 113 is provided with a plurality of recesses 1131 spaced apart along its circumference. Combined with... Figure 1 As shown, a stop is provided on the outer wall of the refill compartment 11 to form a stop engagement with the upper end of the pen barrel 11, preventing the refill compartment 11 from detaching from the upper end of the pen barrel 11. In actual use, pressing down on the refill compartment 11 can push the clamping assembly 50 downward elastic element. After losing the limiting effect of the tapered section 211, the multiple clamping parts 52 on the upper part of the clamping assembly 50 can expand outward, thereby releasing the clamping fixation on the refill 40. At this time, the length of the refill 40 extending outward through the pen tip 30 can be adjusted. By providing a recess 1131 at the lower part of the refill supply section 113, the outward expansion of the clamping parts 52 on the upper part of the clamping assembly 50 can be accommodated.
[0027] In this invention, the receiving section 111, the material leakage section 112, and the core supply section 113 are integrally formed.
[0028] In this invention, the elastic element can be any suitable structural form, as long as it can provide a force to drive the clamping assembly 50 to move upward, so that the multiple clamping parts 52 on the upper part of the clamping assembly 50 approach each other under the guidance of the tapered section 211, thereby achieving clamping and fixing of the pen refill 40. In some embodiments of this invention, the elastic element is a spring 60 that extends and contracts in the vertical direction, and the pen refill 40 passes through the middle of the spring 60 and extends to the pen tip 30.
[0029] In this invention, the connecting tube 20 has a downward-opening connecting groove 22 on its outer side for the upper end of the pen tip 30 to be inserted into. A threaded structure is provided on the outer wall of the connecting groove 22 to mate with the threaded structure on the upper part of the pen tip 30. This design ensures that the connecting tube 20 extends into the pen tip 30, thereby providing better support for the pen refill 40 between the pen barrel 10 and the pen tip 30 through the clamping assembly 50, preventing the pen refill 40 from breaking.
[0030] In this invention, the upper part of the connecting tube 20 is connected to the lower end of the pen barrel 10 by a thread.
[0031] In this invention, the mechanical pencil further includes a grip sleeve 70, which is fitted over the connecting tube 20. The upper and lower ends of the grip sleeve 70 extend to cover the connection points between the connecting tube 20 and the pencil barrel 10 and the pencil tip 30, respectively. The grip sleeve 70 provides anti-slip, cushioning, and comfortable grip, reducing friction between fingers and the mechanical pencil, preventing slippage due to hand sweat, and enhancing grip stability. Furthermore, by extending the upper and lower ends of the grip sleeve 70 to cover the connection points between the connecting tube 20 and the pencil barrel 10 and the pencil tip 30, it also enhances aesthetics. In this invention, the grip sleeve 70 can be made of materials commonly used in the prior art, such as rubber or silicone.
[0032] In this invention, a pen clip 13 is connected to the upper part of the pen barrel 10. The pen clip 13 facilitates the fixing of the mechanical pencil in this invention.
[0033] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings; however, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately. However, these simple modifications and combinations should also be considered as the content disclosed in the present invention and are all within the protection scope of the present invention.
Claims
1. A mechanical pencil, characterized in that, The device includes a pen barrel (10), a connecting tube (20), and a pen tip (30) connected sequentially from top to bottom. The connecting tube (20) has a first channel (21) extending in the vertical direction for the pen refill (40) to extend from the pen barrel (10) to the pen tip (30). At least a portion of the first channel (21) is formed as a tapered section (211) from bottom to top. A clamping assembly (50) is provided in the first channel (21). The clamping assembly (50) has a second channel extending in the vertical direction. 51) The pen refill (40) passes through the pen refill. The upper part of the clamping assembly (50) has a plurality of clamping parts (52). The plurality of clamping parts (52) are evenly and spaced around the pen refill (40) in the circumferential direction. An elastic member is provided between the clamping assembly (50) and the pen tip (30). The elastic member is used to drive the plurality of clamping parts (52) of the clamping assembly (50) to move upward along the tapered section (211) of the first channel (21) and clamp the pen refill (40).
2. The mechanical pencil according to claim 1, characterized in that, The pen barrel (10) is provided with a refill compartment (11) for accommodating the refill (40). The lower end of the refill compartment (11) is in contact with the upper end of the clamping assembly (50). The upper end of the refill compartment (11) extends out of the upper end of the pen barrel (10) and is provided with a removable pressure cap (12).
3. The mechanical pencil according to claim 2, characterized in that, The refill compartment (11) includes a receiving section (111), a dispensing section (112), and a refill supply section (113) connected sequentially from top to bottom. The receiving section (111) is used to receive multiple refills (40). The inner diameter of the refill supply section (113) is set to allow only a single refill (40) to pass through. The dispensing section (112) is funnel-shaped so that the refill (40) in the receiving section (111) can enter the refill supply section (113).
4. The mechanical pencil according to claim 3, characterized in that, The lower part of the core supply section (113) is provided with a plurality of recesses (1131) spaced apart along its circumference.
5. The mechanical pencil according to claim 3, characterized in that, The receiving section (111), the leaking section (112), and the core supply section (113) are made as a single unit.
6. The mechanical pencil according to claim 1, characterized in that, The elastic element is a spring (60) that extends and contracts in the vertical direction, and the pen core (40) passes through the middle of the spring (60) and extends to the pen tip (30).
7. The mechanical pencil according to claim 1, characterized in that, The connecting tube (20) has a downward-opening connecting groove (22) on its outside for the upper end of the pen tip (30) to be inserted, and a threaded structure is provided on the outer wall of the connecting groove (22) for cooperating with the threaded structure on the upper part of the pen tip (30).
8. The mechanical pencil according to claim 1, characterized in that, The upper part of the connecting tube (20) is connected to the lower end of the pen barrel (10) by a thread.
9. The mechanical pencil according to any one of claims 1-8, characterized in that, The mechanical pencil also includes a grip sleeve (70), which is fitted over the outside of the connecting tube (20). The upper and lower ends of the grip sleeve (70) extend to cover the connection between the connecting tube (20) and the pencil barrel (10) and the pencil tip (30).
10. The mechanical pencil according to claim 9, characterized in that, The upper part of the pen barrel (10) is connected to a pen clip (13).