A plug-in type pencil sharpener

Abstract

The utility model relates to a kind of plug-in type pencil sharpener, including shell, inner core and blade, shell is sleeve-like structure, its inside is equipped with inner core installation cavity, the opening gap for guiding shaving is discharged to right end, right end is equipped with plug-in structure and constitutes chip space;Inner core is installed in middle region, and it is hollow column structure, with insertion port and the axial through-hole that penetrates, through-hole is equipped with multiple cambered surface sections of different taper, and shaving space is formed in through-hole inside;Blade is fixed to inner core inner wall, it is arranged along axial direction obliquely, cutting edge is oriented radial outer side and forms predetermined angle with middle axis line.The utility model solves the technical problems that pencil sharpener is difficult to integrate with pen holder, shaving is not easy to be collected and stored and is difficult to adapt to multiple specifications of pencil core.

Description

Technical Field

[0001] This utility model relates to the field of stationery technology, and in particular to a plug-in pencil sharpener. Background Technology

[0002] A pencil sharpener is a common stationery tool used to sharpen pencil leads, colored pencil leads, and other pencil leads. A typical pencil sharpener includes a blade, a guide hole, and an external structure to collect the shavings. To use it, the pencil lead is inserted from one end, and by rotating or pushing it forward, the lead moves relative to the blade, thus sharpening the pencil.

[0003] In existing technologies, pencil sharpeners are mostly freestanding structures, typically requiring separate holding or attachment to an external casing. Their structure and usage still present certain shortcomings in practical applications. Lack of integrated compatibility with pen barrels: Most existing pencil sharpeners are individual components or independent shell structures, which cannot be directly plugged into the barrels of mechanical pencils, colored pencils, etc. to form an integrated usage mode, thus limiting the convenience of carrying and using them.

[0004] The shavings collection method is not concentrated enough: the shavings of traditional pencil sharpeners usually accumulate near the blade and are then poured out or disassembled for cleaning. They fail to form a stable integrated shavings collection structure with the pen barrel or end space, which can easily cause shavings to scatter or be inconvenient to clean when sharpening continuously.

[0005] Insufficient structural expandability and versatility: Many pencil sharpeners have fixed blades and main body structures, making it difficult to replace end caps, decorative parts, or adapt to different types of pen barrel installation scenarios without changing the main body; at the same time, the compatibility with different diameter pen refills is also relatively limited, making it difficult to meet the needs of using multiple pen refill sizes.

[0006] Therefore, there is a need for a pencil sharpener structure that is compact, can be integrated with the pen barrel, can centrally collect shavings, and is compatible with multiple pen refill sizes, in order to improve ease of use, versatility, and cleanliness. Utility Model Content

[0007] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a plug-in pencil sharpener that is compact in structure, can be integrated with a pen barrel, can realize the centralized collection of shavings, and is compatible with multiple specifications of pen refills.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: A plug-in pencil sharpener includes: a shell, an inner core, and a blade. The shell has a sleeve-like structure with an inner core mounting cavity inside. The inner core mounting cavity has an opening gap on its upper side to guide the chips out to the right. The right end of the shell forms a plug-in structure, and the inside of the plug-in structure forms a chip-collecting space for collecting chips. The inner core is installed in the middle region of the inner core mounting cavity and has a columnar hollow structure with an insertion port at the left end and a through axial hole. The axial hole has multiple arc-shaped segments with different tapers in sequence, and a chip-collecting space is formed inside the through hole. The blade is fixedly installed on the inner wall of the inner core and is arranged obliquely along the axial direction of the inner core. The cutting edge of the blade faces the radially outward side of the inner core and forms a predetermined angle with the central axis of the inner core.

[0009] In one possible implementation, two arc-shaped segments with different tapers are used to accommodate lead cores of different diameters, one arc-shaped segment accommodating a lead core with a diameter of 2.0 mm and the other arc-shaped segment accommodating a lead core with a diameter of 3.0 mm.

[0010] In one possible implementation, a plurality of axially extending first guide portions are evenly distributed circumferentially on the inner wall of the plug-in structure, and the first guide portions are in the form of strips.

[0011] In one possible implementation, the left end of the inner core mounting cavity is a planar structure, which is integrally formed with the inner wall of the outer shell, and the left end area of ​​the outer shell is divided into a mounting end cap cavity.

[0012] In one possible implementation, a plurality of axially extending second guide portions are evenly distributed circumferentially on the inner wall of the mounting end cap cavity, and the second guide portions are in the form of strips.

[0013] In one possible implementation, the right end of the inner core is provided with a radially extending slot structure, and the right end of the inner core mounting cavity is provided with a radially extending strip-shaped snap-fit ​​part. The strip-shaped snap-fit ​​part is inserted into the slot structure and fits and snaps against it to achieve the limiting positioning between the inner core and the outer shell.

[0014] The aforementioned plug-in pencil sharpener achieves integrated use with the pencil barrel by incorporating a detachable hollow core structure, an angled blade, and openings and shavings space for guiding and collecting shavings within the outer casing. It also supports shavings from various pencil leads, improving the efficiency of shavings collection and the adaptability and versatility of the structure. This effectively solves the shortcomings of traditional pencil sharpeners in terms of portability, shavings removal, and compatibility with different pencil barrels. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the internal structure of the plug-in pencil sharpener provided by this utility model; Figure 2This is a structural schematic diagram of the inner core and blade provided by this utility model; Figure 3 This is a left view of the plug-in pencil sharpener provided according to this utility model. Detailed Implementation

[0016] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] In addition, to clearly illustrate the technical solution of this application, the following are also defined: Figure 1 The top, bottom, left, right, front, and back sides are shown.

[0018] like Figures 1 to 3 As shown, this application provides a plug-in pencil sharpener, which includes: a housing 1, an inner core 3, and a blade 4. Specifically, the outer shell 1 has a sleeve-shaped structure, and an inner core mounting cavity 2 is provided inside. The inner core mounting cavity 2 has an opening gap on the upper side to guide the chips to be discharged to the right. The right end of the outer shell 1 forms a plug-in structure, and the inside of the plug-in structure forms a chip-collecting space for collecting chips. The inner core 3 is installed in the middle area of ​​the inner core mounting cavity 2. It has a columnar hollow structure with an insertion port at the left end and a through axial hole. The axial hole has multiple arc-shaped sections 31 with different tapers in sequence, and a chip-collecting space is formed inside the through hole. The blade 4 is fixedly installed on the inner wall of the inner core 3 and is arranged obliquely along the axial direction of the inner core 3. The cutting edge of the blade 4 faces the radially outer side of the inner core 3 and forms a predetermined angle with the central axis of the inner core 3.

[0019] This plug-in pencil sharpener features an inner core mounting cavity 2 inside the outer casing 1, with a plug-in structure at its right end, allowing direct use with mechanical pencils, colored pencils, and other pencils. The inner core 3 has a cylindrical hollow structure with multiple tapered arc segments 31 within its internal axial through-hole, guiding pencil leads of different sizes gradually towards the blade 4 for chipping. The blade 4 is mounted on the inner wall of the inner core 3 and arranged obliquely along the axial direction, with the cutting edge facing radially outward. This allows the pencil lead to chip along the blade during advancement, and the chips are discharged and collected through the gap in the opening into the chip-collecting space within the plug-in structure at the right end, preventing chips from overflowing or scattering.

[0020] Two curved sections 31 with different tapers are used to accommodate lead cores of different diameters. One curved section 31 is adapted to lead cores with a diameter of 2.0mm, and the other curved section 31 is adapted to lead cores with a diameter of 3.0mm. This design effectively improves the pencil sharpener's compatibility with various lead core sizes, especially enabling quick adaptation between common 2.0mm and 3.0mm lead cores without the need to change the blade or inner core, meeting diverse user needs and enhancing the product's versatility and practicality. Based on the above solution, the number and size of the tapered sections 31 can be expanded according to the mainstream lead core sizes on the market, for example, by adding curved sections to accommodate 0.5mm, 0.7mm, or 1.0mm diameter lead cores, to achieve broader compatibility.

[0021] Multiple axially extending first guide portions 11 are evenly distributed circumferentially on the inner wall of the plug-in structure. The first guide portions 11 are strip-shaped. By setting the first guide portions 11, the plug-in structure can achieve the guiding and stabilizing functions for pen barrels of different shapes or sizes, enhance the adaptability and reliability between the pencil sharpener and the pen barrel, effectively improve the connection strength and reduce shaking.

[0022] The left end of the inner core mounting cavity 2 is a planar structure, integrally formed with the inner wall of the outer shell 1, and it divides the left end area of ​​the outer shell 1 into a mounting end cap cavity. Using an integrally formed planar structure to divide the left end area into a mounting end cap cavity helps improve the overall modular design capability and structural stability of the pencil sharpener, facilitating the expansion of end functions, such as mounting pen barrel connectors, dust covers, storage compartments, etc., thus enhancing the product's functionality and adaptability. Furthermore, this structure reduces performance degradation caused by component misalignment or loosening, extending its service life.

[0023] Multiple axially extending second guide portions 12 are evenly distributed circumferentially on the inner wall of the end cap mounting cavity. These second guide portions 12 are strip-shaped. By providing the second guide portions 12, the guiding and stability of the end cap installation can be effectively improved, avoiding detachment or missed machining due to installation errors. Simultaneously, the strip-shaped structure is easy to process, has high material utilization, and helps reduce manufacturing costs. Furthermore, this structure enhances the modularity and maintainability of the product, facilitating user replacement or upgrades of the end cap assembly.

[0024] The inner core 3 has a radially extending slot structure 32 at its right end, and a radially extending strip-shaped snap-fit ​​part 21 at its right end. The strip-shaped snap-fit ​​part 21 is inserted into and engaged with the slot structure 32 to achieve positioning between the inner core 3 and the outer shell 1. This snap-fit ​​structure achieves an efficient and secure positioning connection between the inner core 3 and the outer shell 1, preventing a decrease in chipping accuracy or structural damage due to component loosening. Simultaneously, the strip-shaped snap-fit ​​design simplifies assembly operations and reduces the difficulty of manual assembly.

[0025] The above description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A plug-in pencil sharpener, characterized in that, include: The outer shell (1) has a sleeve-shaped structure and an inner core mounting cavity (2) inside. The inner core mounting cavity (2) has an opening gap on the upper side to guide the chips to be discharged to the right. The right end of the outer shell (1) forms a plug-in structure, and the plug-in structure forms a chip-containing space for collecting chips. The inner core (3) is installed in the middle region of the inner core mounting cavity (2), and has a columnar hollow structure. It has an insertion port at the left end and a through axial hole. The through hole is provided with multiple arc surface segments (31) with different tapers in sequence, and a chip space is formed inside the through hole. The blade (4) is fixedly installed on the inner wall of the inner core (3) and is arranged obliquely along the axial direction of the inner core (3). The cutting edge of the blade (4) faces the radial outer side of the inner core (3) and forms a predetermined angle with the central axis of the inner core (3).

2. The plug-in pencil sharpener as described in claim 1, characterized in that, The two arc-shaped sections (31) with different tapers are used to adapt to lead cores of different diameters. One arc-shaped section (31) is adapted to lead cores with a diameter of 2.0 mm, and the other arc-shaped section (31) is adapted to lead cores with a diameter of 3.0 mm.

3. The plug-in pencil sharpener as described in claim 1, characterized in that, The inner wall of the plug structure has a plurality of axially extending first guide portions (11) evenly distributed along the circumference, and the first guide portions (11) are in the form of strips.

4. The plug-in pencil sharpener as described in claim 1, characterized in that, The left end of the inner core mounting cavity (2) is a planar structure, which is integrally formed with the inner wall of the outer shell (1) and divides the left end area of ​​the outer shell (1) into a mounting end cap cavity.

5. The plug-in pencil sharpener as described in claim 4, characterized in that, The inner wall of the mounting end cap cavity is evenly distributed with multiple axially extending second guide portions (12) along the circumferential direction, and the second guide portions (12) are in the form of strips.

6. The plug-in pencil sharpener as described in claim 1, characterized in that, The inner core (3) has a radially extending slot structure (32) at its right end, and the inner core mounting cavity (2) has a radially extending strip-shaped snap-fit ​​part (21) at its right end. The strip-shaped snap-fit ​​part (21) is inserted into the slot structure (32) and snaps against it, which is used to realize the limiting positioning between the inner core (3) and the outer shell (1).

Images