Knife rest of pencil sharpener and pencil sharpener

Abstract

The knife rest of the pencil sharpener comprises a knife rest body, the knife rest body is provided with a first base and a second base which are used for assembling pencil sharpening tools, the knife rest body is provided with a pencil sharpening area between the first base and the second base, one end of the knife rest body is provided with a pencil inserting hole channel, and the other end of the knife rest body is provided with a pencil inserting hole channel. A pencil sharpening groove and a bearing block are arranged in the pencil sharpening area in the axis direction of the pencil inserting hole channel, a guide groove and a bearing groove are formed in the bearing block, the pencil sharpening groove, the guide groove and the bearing groove are sequentially and coaxially arranged with the pencil inserting hole channel and are all conical grooves, and the taper of the guide groove is larger than that of the bearing groove. By means of the pencil sharpener, a pencil lead sharpened by the pencil sharpener is long and thin, and the pencil lead is not prone to being broken in the pencil sharpening process.

Description

Technical Field

[0001] This utility model relates to the technical field of pencil sharpeners, and more specifically to a pencil sharpener blade holder and a pencil sharpener. Background Technology

[0002] Existing pencil sharpeners typically produce pencil leads that are 3-4mm long, which is only sufficient for ordinary pencils. However, for sketching pencils, which are worn down during drawing and require long, thin leads, the lead is generally required to protrude at least 8mm from the wooden casing of the pencil's cone-shaped head, and sometimes even more than 1.5cm. In addition, sketching pencil leads are very soft and easily break during sharpening. Existing pencil sharpeners clearly cannot meet the needs of sketching pencils. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a blade holder for a pencil sharpener, which can be used in a pencil sharpener to sharpen sketch pencils, producing fine and long leads that are not easily broken during the sharpening process.

[0004] The technical solution of this utility model is to provide a tool holder for a pencil sharpener, including a tool holder body, a first base and a second base for assembling pencil sharpeners on the tool holder body, a pencil sharpening area between the first base and the second base on the tool holder body, a pencil insertion hole at one end of the tool holder body, a pencil sharpening groove and a support block arranged along the axial direction of the pencil insertion hole in the pencil sharpening area, a guide groove and a support groove arranged on the support block, the pencil sharpening groove, the guide groove and the support groove being arranged coaxially with the pencil insertion hole and all being conical grooves, the taper of the guide groove being greater than the taper of the support groove.

[0005] Compared with the prior art, the blade holder of the pencil sharpener of this utility model has the following advantages: a support block is added in the pencil sharpening area, the guide groove guides the conical head of the pencil, and the support groove supports the pencil lead. This not only makes the sharpened lead thin and long, but also prevents the lead from breaking during the sharpening process. The taper of the guide groove is greater than that of the support groove, which adapts to the structural characteristics of the pencil lead and the conical head of the pencil, making the support groove more suitable for the lead and reducing the probability of lead breakage.

[0006] Preferably, the angle between the generatrix of the conical groove surface of the guide groove and the central axis is 15° to 25°, and the angle between the generatrix of the conical groove surface of the support groove and the central axis is 10° to 15°. With this structure, the guide groove is better suited to the conical head shape of the pencil, and the support groove is better suited to the lead shape, reducing the probability of lead breakage.

[0007] Preferably, a connecting surface for reducing the inner diameter is provided between the guide groove and the support groove. With this structure, the connecting surface adapts to the structural features of the transition area from the pencil's conical tip to the lead, making the support groove more suitable for the lead and reducing the probability of lead breakage.

[0008] Preferably, the main body of the pencil holder has a lead retention area behind the sharpening area, which is located behind the support block. With this structure, the lead retention area provides space for the slender lead to extend beyond the support groove, preventing the lead from touching other components and breaking.

[0009] This utility model also provides a pencil sharpener, including a housing, a pencil feeding mechanism, and a blade holder as described above. A first base and a second base are provided with pencil sharpening blades, which are opposite to the sharpening groove. With this structure, the pencil sharpener of this utility model can be used to sharpen sketch pencils, producing long and thin leads that are less prone to breakage during sharpening. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the blade holder of the pencil sharpener of this utility model.

[0011] Figure 2 This is a left view of the blade holder of the pencil sharpener of this utility model.

[0012] As shown in the figure: 1. Knife holder body, 2. Pen insertion hole, 3. Pen sharpening groove, 4. Support block, 4-1. Guide groove, 4-2. Connecting surface, 4-3. Support groove, 6. Pen refill retention area, 7. First base, 8. Second base. Detailed Implementation

[0013] To better understand this application, various aspects of this application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely illustrative of exemplary embodiments of this application and are not intended to limit the scope of this application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0014] In the accompanying drawings, the thickness, size, and shape of the objects have been slightly exaggerated for illustrative purposes. The drawings are for illustrative purposes only and are not drawn to scale.

[0015] It should also be understood that the terms "comprising," "having," "including," and "containing," when used in this specification, indicate the presence of the stated features, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or combinations thereof. Furthermore, when expressions such as "...at least one" appear after a list of listed features, they modify the entire listed feature, not individual elements in the list.

[0016] Example 1:

[0017] like Figure 1As shown, the pencil sharpener of this utility model includes a pencil holder body 1, on which a first base 7 and a second base 8 for assembling pencil sharpeners are provided, and a sharpening area is provided on the pencil holder body 1 between the first base 7 and the second base 8. Figure 1 and Figure 2 As shown, one end of the pencil holder body 1 is provided with a pencil insertion channel 2. Within the pencil sharpening area, a pencil sharpening groove 3 and a support block 4 are sequentially arranged along the axial direction of the pencil insertion channel 2. The support block 4 is provided with a guide groove 4-1 and a support groove 4-3. The pencil sharpening groove 3, guide groove 4-1, and support groove 4-3 are conical grooves arranged coaxially with the pencil insertion channel 2. The taper of the guide groove 4-1 is greater than the taper of the support groove 4-3. In this embodiment, the angle between the generatrix of the conical groove surface of the guide groove 4-1 and the central axis is 15° to 25°, and the angle between the generatrix of the conical groove surface of the support groove 4-3 and the central axis is 10° to 15°. A connecting surface 4-2 for narrowing the inner diameter is provided between the guide groove 4-1 and the support groove 4-3. The pencil sharpening groove 3 is used to guide the pencil cutting and advancing, the guide groove 4-1 is used to guide the conical head of the pencil after cutting, and the support groove 4-3 is used to support the pencil lead. The pencil holder body 1 has a pencil lead retention area 6 behind the pencil sharpening area. The pencil lead retention area 6 is located behind the support block 4, and the pencil lead can extend above the pencil lead retention area 6 under the support of the support groove 4-3.

[0018] The pencil sharpener of this utility model includes a housing, a pencil feeding mechanism, and a blade holder as described above. A pencil sharpening tool is provided on the first base 7 and the second base 8, and the pencil sharpening tool is opposite to the pencil sharpening groove 3.

[0019] When the pencil sharpener of this invention is working, the pencil is inserted into the sharpening groove 3 through the pencil insertion hole 2 and is cut by the sharpening tool, making the front part of the pencil gradually thinner. As the sharpening tool rotates, the feeding mechanism gradually pushes the pencil forward along the sharpening groove 3, so that the conical head of the pencil enters the guide groove 4-1. The feeding mechanism continues to push the pencil forward, and the conical head of the pencil moves along the guide groove 4-1, so that the lead smoothly enters the supporting groove 4-3. The supporting groove 4-3 supports the pencil lead. In this way, the pencil lead can be made thin and sharp, and the lead is not easy to break during the sharpening process.

[0020] In the cutting performance test, the pencil sharpener using the blade holder of this utility model only experienced 9 core breakages in 1500 tests, compared to 39 core breakages in 1500 tests using other blade holders, demonstrating a significant improvement in core breakage prevention performance.

[0021] The above are merely specific embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Any modifications or equivalent substitutions to this utility model without departing from its spirit and scope should be covered within the protection scope of the claims of this utility model.

Claims

1. A knife holder of a pencil sharpener, comprising a knife holder body (1) provided with a first base (7) and a second base (8) for assembling a pencil sharpener knife, the knife holder body (1) being provided with a pencil sharpening area between the first base (7) and the second base (8), one end of the knife holder body (1) being provided with a pencil insertion channel (2), characterized in that, The pencil sharpening area is provided with a pencil sharpening groove (3) and a supporting block (4) along the axis direction of the pencil inserting channel (2), the supporting block (4) is provided with a guide groove (4-1) and a supporting groove (4-3), the pencil sharpening groove (3), the guide groove (4-1) and the supporting groove (4-3) are coaxially provided with the pencil inserting channel (2) in sequence and are all conical grooves, and the taper of the guide groove (4-1) is greater than that of the supporting groove (4-3).

2. A sharpener knife holder according to claim 1, characterized in that The included angle between the generatrix of the conical groove surface of the guide groove (4-1) and the central axis is 15° to 25°, and the included angle between the generatrix of the conical groove surface of the supporting groove (4-3) and the central axis is 10° to 15°.

3. The sharpener of claim 1, wherein, A connecting surface (4-2) for shrinking the inner diameter is arranged between the guide groove (4-1) and the supporting groove (4-3).

4. The sharpener of claim 1, wherein, A pencil core retaining area (6) is arranged on the cutter holder main body (1) behind the pencil sharpening area, and the pencil core retaining area (6) is located behind the supporting block (4).

5. A pencil sharpener characterized by The cutter holder comprises a shell, a pencil inserting mechanism and a pencil sharpener as claimed in any one of claims 1 to 4, the first base (7) and the second base (8) are provided with pencil sharpening cutters, and the pencil sharpening cutters are opposite to the pencil sharpening groove (3).

Images