A portable pencil

Abstract

This utility model belongs to the field of stationery technology, specifically relating to a portable pencil, including a pencil barrel with a rotating handle rotatably mounted on it, and a pencil tip threadedly connected to the rotating handle; it also includes: a lifting cylinder slidably disposed within the pencil barrel, the lifting cylinder being threadedly connected to the rotating handle, and a pencil tip disposed at the lower end of the lifting cylinder; a lead feeding mechanism disposed within the lifting cylinder; and a pressing handle slidably disposed on the lead feeding mechanism. This portable pencil, through the threaded connection between the rotating handle and the threaded portion of the lifting cylinder, combined with a sliding limit design of a sliding strip on the lifting cylinder within the pencil barrel, allows for easy and flexible adjustment of the pencil tip extension or retraction by simply rotating the rotating handle during use. When the pencil is not in use, the pencil tip can be retracted, effectively preventing damage from impacts; during writing, the pencil tip can be adjusted to a suitable length according to personal usage habits.

Description

Technical Field

[0001] This utility model belongs to the field of stationery technology, specifically relating to a portable pencil. Background Technology

[0002] Portable pencils, also known as mechanical pencils, are ideal tools for modern writing and drawing. They require no manual sharpening; the press-to-expend design allows for easy control of the lead length, making them convenient and smooth to use. Their compact and lightweight design makes them easy to carry, taking up minimal space in pockets, pencil cases, or backpacks. They are also compatible with various lead sizes, including HB and 2B, to meet diverse needs such as daily writing, drawing, and exam marking.

[0003] Most existing mechanical pencils have fixed, non-extendable tips, which are easily damaged by collisions during transport, shortening the lifespan of the pencil. In addition, different users have different preferences for the length of the extended tip, but existing products cannot meet personalized needs and cannot take into account different scenarios such as smooth writing with a long tip and precise drawing with a short tip. Therefore, a portable pencil is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a portable pencil that can be adjusted and has its tip stored in order to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A portable pencil includes a barrel, a rotating handle rotatably disposed on the barrel, and a pencil tip threadedly connected to the rotating handle;

[0007] It also includes:

[0008] A lifting cylinder is slidably disposed in the pen barrel, the lifting cylinder is threadedly connected to the rotating handle, and a pen tip is provided at the lower end of the lifting cylinder;

[0009] A core feeding mechanism, wherein the core feeding mechanism is disposed in a lifting cylinder;

[0010] The pressing handle is slidably mounted on the core feeding mechanism.

[0011] As a further optimization of this utility model, the lifting cylinder is provided with a threaded part, the lifting cylinder is threadedly connected to the rotating handle through the threaded part, the lifting cylinder is provided with an array of sliding bars, the lifting cylinder is slidably disposed in the pen barrel through the sliding bars, and a locking hoop is fixedly provided inside the lifting cylinder.

[0012] As a further optimization of this utility model, the core feeding mechanism includes a push rod, which is slidably disposed in the lifting cylinder. A spring is sleeved on the push rod, and both ends of the spring are respectively connected to a locking clamp and the push rod. A claw is provided at the lower end of the push rod, and the locking clamp is sleeved on the claw.

[0013] As a further optimization of this utility model, inclined blocks B are provided on both sides of the upper end of the push rod, and inclined blocks A are provided on both sides of the pressing handle. The inclined blocks A and inclined blocks B cooperate with each other. A spring is provided between the pressing handle and the push rod. A positioning post is provided on the push rod, and a hollow post is sleeved on the positioning post. The hollow post is fixedly installed on the pressing handle.

[0014] As a further optimization of this utility model, the pen tip is slidably disposed on the pen head.

[0015] As a further optimization of this utility model, the pen barrel is provided with an avoidance groove, and the pressing handle is slidably disposed in the avoidance groove, and the pressing handle passes through the pen barrel through the avoidance groove.

[0016] The beneficial effects of this utility model are as follows:

[0017] Unlike existing technologies, this product utilizes a threaded connection between the rotating handle and the threaded part of the lifting cylinder, combined with a sliding limit design for the sliding bar on the lifting cylinder within the pen barrel. During use, simply rotating the handle allows for easy and flexible adjustment of the pen tip's extension or retraction. When the pencil is not in use, the tip can be retracted, effectively preventing damage from impacts. During writing, the tip can be adjusted to a suitable length according to personal preference, providing a more comfortable user experience for both those who prefer a long tip for smooth writing and those who prefer a short tip for precise drawing, greatly enhancing the product's practicality and applicability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a utility model Figure 1 Schematic diagram of partial cross-section;

[0020] Figure 3 This is a utility model Figure 1 Explosion structure diagram;

[0021] Figure 4 This is a partial cross-sectional structural diagram of the lifting cylinder of this utility model.

[0022] In the diagram: 1. Pen barrel; 11. Pen tip; 12. Clearance groove; 2. Rotating handle; 3. Lifting cylinder; 31. Threaded part; 32. Sliding bar; 33. Locking clamp; 4. Press handle; 41. Inclined block A; 42. Inclined block B; 43. Spring one; 44. Hollow column; 441. Positioning column; 5. Core feeding mechanism; 51. Push rod; 52. Claw plate; 53. Spring two; 6. Pen tip. Detailed Implementation

[0023] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0024] Example 1

[0025] like Figure 1 - Figure 4 As shown, a portable pencil includes a barrel 1, a rotating handle 2 rotatably mounted on the barrel 1, and a pencil tip 11 threadedly connected to the rotating handle 2. It also includes a lifting cylinder 3 slidably mounted within the barrel 1, threadedly connected to the rotating handle 2, with a pencil tip 6 at its lower end. The pencil tip 6 slidably passes through the pencil tip 11. A lead-feeding mechanism 5 is located within the lifting cylinder 3, and a pressing handle 4 is slidably mounted on the lead-feeding mechanism 5. A clearance groove 12 is provided on the barrel 1, and the pressing handle 4 slidably resides within the clearance groove 12, passing through the barrel 1. This structure, through the threaded transmission between the rotating handle 2 and the lifting cylinder 3, converts rotational motion into linear motion, achieving precise control of the extension and retraction of the pencil tip 6. This avoids damage to the exposed pencil tip and allows adjustment of the extension length according to writing needs. The design of the clearance groove 12 allows the pressing handle 4 to operate without being restricted by the barrel 1, improving ease of use.

[0026] The lifting cylinder 3 is provided with a threaded part 31, which is threadedly connected to the rotating handle 2. The lifting cylinder 3 is provided with an array of sliding bars 32, which are slidably disposed in the pen barrel 1. A locking clamp 33 is fixedly installed inside the lifting cylinder 3. The cooperation between the threaded part 31 and the rotating handle 2 forms a helical transmission pair, providing a stable lifting driving force. The sliding cooperation between the sliding bars 32 and the pen barrel 1 restricts the rotational freedom of the lifting cylinder 3, ensuring its smooth axial movement. The locking clamp 33 provides stable support for the core feeding mechanism 5, ensuring the reliability of the lead core feeding.

[0027] The core feeding mechanism 5 includes a push rod 51, which is slidably disposed in the lifting cylinder 3. A spring 53 is sleeved on the push rod 51, and the two ends of the spring 53 are respectively connected to the locking clamp 33 and the push rod 51. A claw 52 is provided at the lower end of the push rod 51, and the locking clamp 33 is sleeved on the claw 52. The elastic force of the spring 53 enables the push rod 51 to have an automatic reset function, ensuring the continuity of the core feeding action. The cooperation between the claw 52 and the locking clamp 33 forms an elastic clamp structure. When the claw 52 extends out of the locking clamp 33, the outer diameter expands to release the lead core, and when it retracts, the inner diameter contracts to clamp the lead core, thereby achieving precise control of lead core clamping and release.

[0028] The push rod 51 has inclined blocks B42 on both sides of its upper end, and the pressing handle 4 has inclined blocks A41 on both sides. The inclined blocks A41 and B42 cooperate with each other. A spring 43 is installed between the pressing handle 4 and the push rod 51. The push rod 51 has a positioning post 441, and a hollow post 44 is sleeved on the positioning post 441. The hollow post 44 is fixedly installed on the pressing handle 4. The inclined blocks A41 and B42 form an inclined plane transmission mechanism, which converts the vertical movement of the pressing handle 4 into the horizontal displacement of the push rod 51, realizing the conversion of the force direction. The spring 43 provides a buffering effect to avoid the lead core breaking due to excessive impact force at the moment of pressing. The sleeve structure of the positioning post 441 and the hollow post 44 ensures the relative movement accuracy of the pressing handle 4 and the push rod 51 and improves the core feeding stability.

[0029] It should be noted that the working principle of this portable pencil is as follows: When the rotating handle 2 is rotated, the rotating handle 2 is connected to the lifting cylinder 3 through the threaded part 31, and the lifting cylinder 3 slides and is limited in the pen barrel 1 through the sliding bar 32. When the rotating handle 2 is rotated, it will drive the lifting cylinder 3 to slide up and down in the pen barrel 1, so that the lower end of the pen tip 6 extends or retracts through the pen head 11, realizing the extension and retraction adjustment of the pen tip 6. When in use, press the pressing handle 4. The inclined block A41 on the pressing handle 4 and the inclined block B42 on the push rod 51 cooperate with each other to push the push rod 51 to slide down in the lifting cylinder 3. The claw 52 moves down accordingly. When the claw 52 extends out of the locking clamp 33, it opens and releases the lead core. When the pressing handle 4 is released, the push rod 51 returns to its original position under the action of the spring 53, and the claw 52 retracts into the locking clamp 33 to clamp the lead core, completing one lead feeding.

[0030] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A portable pencil comprising a pencil shaft (1), characterized in that: The pen barrel (1) is rotatably provided with a rotating handle (2), and the pen tip (11) is threadedly connected to the rotating handle (2); It also includes: The lifting cylinder (3) is slidably disposed in the pen barrel (1), the lifting cylinder (3) is threadedly connected to the rotating handle (2), and the lower end of the lifting cylinder (3) is provided with a pen tip (6); Core feeding mechanism (5), wherein the core feeding mechanism (5) is disposed in the lifting cylinder (3); Press handle (4), which is slidably disposed on core feeding mechanism (5).

2. A portable pencil according to claim 1, characterized in that: The lifting cylinder (3) is provided with a threaded part (31), and the lifting cylinder (3) is threadedly connected to the rotating handle (2) through the threaded part (31). The lifting cylinder (3) is provided with an array of sliding bars (32), and the lifting cylinder (3) is slidably disposed in the pen barrel (1) through the sliding bars (32). A locking clamp (33) is fixedly disposed inside the lifting cylinder (3).

3. A portable pencil according to claim 2, wherein: The core feeding mechanism (5) includes a push rod (51), which is slidably disposed in the lifting cylinder (3). A spring (53) is sleeved on the push rod (51), and the two ends of the spring (53) are respectively connected to the locking clamp (33) and the push rod (51). A claw plate (52) is provided at the lower end of the push rod (51), and the locking clamp (33) is sleeved on the claw plate (52).

4. A portable pencil according to claim 3, wherein: The push rod (51) has inclined blocks B (42) on both sides of its upper end, and the pressing handle (4) has inclined blocks A (41) on both sides. The inclined blocks A (41) and B (42) cooperate with each other. A spring (43) is provided between the pressing handle (4) and the push rod (51). The push rod (51) has a positioning post (441). A hollow post (44) is sleeved on the positioning post (441). The hollow post (44) is fixedly installed on the pressing handle (4).

5. A portable pencil according to claim 1, wherein: The pen tip (6) is slidably disposed on the pen head (11).

6. A portable pencil according to claim 1, wherein: The pen barrel (1) is provided with a relief groove (12), and the pressing handle (4) is slidably disposed in the relief groove (12). The pressing handle (4) passes through the pen barrel (1) through the relief groove (12).

Images