Pencil sharpener with self-locking type scrap collecting box

Abstract

The utility model discloses a pencil sharpener with a self-locking type scrap collecting box, which comprises a pencil sharpener main body and a drawing type scrap collecting box, and the pencil sharpener main body at the bottom of the box comprises a shell and a pencil sharpening mechanism; the box bottom pencil sharpening mechanism is arranged in the upper space of the shell, and a cabin is arranged in the lower space of the shell. The box bottom cabin is provided with a concave cavity allowing the scrap collecting box to move in or out, the box bottom cabin comprises an inlet and outlet, and the box bottom concave cavity is communicated with the upper space of the shell; the box bottom cabin body comprises a shell bottom, and an arc-shaped elastic piece arching upwards is integrally formed at the shell bottom of the box bottom. The arc-shaped extending direction of the box bottom arc-shaped elastic sheet is consistent with the moving direction of the scrap collecting box; the box bottom scrap collecting box comprises a box bottom, an arc-shaped arching part is integrally formed at the box bottom, an arc-shaped inner recess is formed in the lower side of the arc-shaped arching part at the box bottom, and the arc-shaped extending direction of the arc-shaped arching part at the box bottom is kept consistent with the moving direction of the scrap collecting box; therefore, the chip collecting box can be freely locked and quickly unlocked.

Description

Technical Field

[0001] The utility model relates to a pencil sharpener, in particular to a pencil sharpener with a self-locking chip collecting box. The drawer-type chip collecting box of the pencil sharpener is provided with a self-locking structure so that the chip collecting box can be self-locked in a closed state, thereby avoiding the situation that the chip collecting box moves outward or cannot be completely closed. Background Art

[0002] As a common school supplies and office supplies, pencil sharpeners are mainly used to sharpen ordinary pencils, colored pencils, sketch pens, etc. In the design of traditional pencil sharpeners, the chip box is a key component, which is used to collect the pencil shavings generated after cutting pencils to keep the environment clean. However, the chip box of the prior art has some limitations and problems. The following is a detailed description of the prior art background:

[0003] Design of traditional chip box: The chip box of traditional pencil sharpeners usually adopts a pull-out design and is located below the pencil sharpener housing. This design makes it relatively easy to clean the chip box, but it also brings some problems. For example, there is a certain movable gap between the chip box and the housing, which will cause the pencil shavings (including pencil lead powder and wood chips) generated when sharpening the pencil not only to fall into the chip box, but also to enter the housing outside the chip box. At the same time, due to the gap between the chip box and the pencil sharpener housing, this not only reduces the chip collection efficiency, but may also cause the pencil shavings to scatter into the external environment when cleaning the chip box, causing inconvenience in cleaning.

[0004] Some patent documents have proposed technical solutions for improving the chip box structure. For example, a thread or buckle structure is used to achieve close contact between the chip box and the upper housing, thereby preventing pencil shavings from escaping to the outside of the chip box through the movable gap, thereby improving the convenience and cleanliness of the pencil sharpener. Utility Model Content

[0005] Based on the problem that pencil chips leak out due to the movable gap between the existing pull-out chip box and the pencil sharpener shell, the technical problem to be solved by the utility model is to provide a pencil sharpener with a self-locking chip box, in which a self-locking structure is arranged between the pull-out chip box and the shell, and when the chip box is pushed into the shell, the chip box can be self-locked and closed under the action of the self-locking structure.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: a pencil sharpener with a self-locking chip collection box, comprising a pencil sharpener body and a pull-out chip collection box, the pencil sharpener body comprising a shell and a pencil sharpening mechanism; the pencil sharpening mechanism is arranged in the upper space of the shell, and the lower space of the shell is provided with a cabin; the cabin has a concave cavity for the chip collection box to be moved in or out, the cabin comprises an inlet and outlet, and the concave cavity is communicated with the upper space of the shell;

[0007] The cabin body comprises a shell bottom, and the shell bottom is integrally formed with an arc-shaped elastic sheet arched upward; the arc-shaped extension direction of the arc-shaped elastic sheet is consistent with the moving direction of the chip collecting box;

[0008] The chip collecting box includes a box bottom, the box bottom is integrally formed with an arc-shaped arched portion, and an arc-shaped inner depression is formed on the lower side of the arc-shaped arched portion, and the arc-shaped extension direction of the arc-shaped arched portion is consistent with the moving direction of the chip collecting box; in the process of moving the chip collecting box into the concave cavity of the cabin body, when the arc-shaped elastic sheet enters the arc-shaped inner depression, the chip collecting box is locked in the concave cavity by the arc-shaped elastic sheet.

[0009] A further preferred technical solution of the utility model is: the arc-shaped elastic piece includes a root portion connected to the bottom of the shell and a free end, and the horizontal height of the free end is greater than that of the root portion.

[0010] A further preferred technical solution of the utility model is that the free end is closer to the entrance and exit of the cavity than the root.

[0011] A further preferred technical solution of the utility model is: the arc-shaped elastic sheet is located in the middle of the shell bottom, and forms a flat bottom inside the shell and a flat bottom outside the shell at the shell bottom;

[0012] The arc-shaped arched portion is located in the middle of the bottom of the box, and forms an inner flat bottom and an outer flat bottom on the bottom of the box;

[0013] The chip collecting box completely falls into the concave cavity, the inner flat bottom of the box is located above the inner flat bottom of the shell, and the outer flat bottom of the box is located above the outer flat bottom of the shell.

[0014] A further preferred technical solution of the utility model is: the chip collecting box comprises a box bottom and a peripheral side wall, the chip collecting box comprises an upper opening, and the peripheral side wall comprises a rear wall, a left wall, a right wall and a front wall;

[0015] An arc-shaped transition surface is provided between the rear wall and the bottom of the box, so as to guide the free end of the arc-shaped elastic sheet to enter the bottom of the box.

[0016] Another preferred subject: a pencil sharpener with a self-locking chip collection box, comprising a pencil sharpener body and a pull-out chip collection box, wherein the pencil sharpener body comprises a shell and a pencil sharpening mechanism; the pencil sharpening mechanism is arranged in the upper space of the shell, and the lower space of the shell is provided with a cabin; the cabin has a concave cavity for the chip collection box to be moved in or out, the cabin comprises an inlet and outlet, and the concave cavity is communicated with the upper space of the shell;

[0017] The cabin body comprises a shell bottom, and the shell bottom is integrally formed with an arc-shaped elastic sheet arched upward; the arc-shaped elastic sheet comprises a root portion connected to the shell bottom, a highest position and a free end;

[0018] The arc-shaped extension direction of the arc-shaped elastic sheet is consistent with the moving direction of the chip collecting box;

[0019] The chip collecting box comprises a box bottom and peripheral side walls, the chip collecting box comprises an upper opening, and the peripheral side walls comprise a rear wall, a left wall, a right wall and a front wall;

[0020] The bottom of the box is integrally formed with an arc-shaped arched portion, and an arc-shaped inner depression is formed on the lower side of the arc-shaped arched portion, and the arc-shaped extension direction of the arc-shaped arched portion is consistent with the moving direction of the chip collecting box;

[0021] During the process of pushing the chip box into the concave cavity of the cabin body, when the highest position of the arc-shaped elastic sheet passes the inner starting point of the arc-shaped inner recess, the arc-shaped elastic sheet will automatically slide into the arc-shaped inner recess, and the chip box is locked in the concave cavity of the cabin body by the arc-shaped elastic sheet.

[0022] A further preferred technical solution of the utility model is: the horizontal height of the free end is greater than the root;

[0023] The free end is closer to the entrance and exit of the cavity than the root.

[0024] A further preferred technical solution of the utility model is: an arc-shaped transition surface is provided between the rear wall and the bottom of the box to facilitate guiding the free end of the arc-shaped elastic sheet to enter the bottom of the box.

[0025] Another preferred topic: Pencil sharpener with self-locking chip collection box, including:

[0026] A pencil sharpener body and a pull-out chip collecting box, the pencil sharpener body comprising a shell and a pencil sharpening mechanism; the pencil sharpening mechanism is arranged in the upper space of the shell, and a cabin is arranged in the lower space of the shell; the cabin has a concave cavity for the chip collecting box to be moved in or out, the cabin comprises an inlet and outlet, and the concave cavity is communicated with the upper space of the shell;

[0027] The cabin body comprises a shell bottom, the shell bottom is integrally formed with an upwardly arched arc-shaped elastic sheet, the arc-shaped elastic sheet is located in the middle of the shell bottom, and forms a flat bottom inside the shell and a flat bottom outside the shell at the shell bottom; the arc-shaped elastic sheet comprises a root connected to the shell bottom, a highest position and a free end;

[0028] The arc-shaped extension direction of the arc-shaped elastic sheet is consistent with the moving direction of the chip collecting box;

[0029] The bottom of the chip collecting box is integrally formed with an arc-shaped arched portion, the arc-shaped arched portion is located in the middle of the bottom of the box, and forms an inner flat bottom and an outer flat bottom at the bottom of the box; and an arc-shaped inner depression is formed on the lower side of the arc-shaped arched portion, and the arc-shaped extension direction of the arc-shaped arched portion is consistent with the moving direction of the chip collecting box;

[0030] In the process of pushing the chip box into the concave cavity of the cabin body, when the highest position of the arc-shaped elastic sheet passes the inner starting point of the arc-shaped inner depression, the arc-shaped elastic sheet will automatically slide into the arc-shaped inner depression, and at the same time, the chip box is locked in the concave cavity of the cabin body by the arc-shaped elastic sheet; at this time, the flat bottom inside the box is located above the flat bottom inside the shell, and the flat bottom outside the box is located above the flat bottom outside the shell.

[0031] A further preferred technical solution of the utility model is: the horizontal height of the free end is greater than the root;

[0032] The free end is closer to the entrance and exit of the cavity than the root;

[0033] An arc-shaped transition surface is provided between the rear wall of the chip collecting box and the bottom of the box, so as to guide the free end of the arc-shaped elastic sheet to enter the bottom of the box.

[0034] A further preferred technical solution of the utility model is: an arc-shaped concave portion inclined inward is provided on the outer walls on both sides of the entrance and exit of the cabin body; an extension portion is designed on both sides of the front wall of the chip collecting box, and the extension portion is covered on the front side of the arc-shaped concave portion;

[0035] The outer edge of the extension portion cooperates with the corresponding arc-shaped recessed portion to form a force application area for finger operation, so as to facilitate the user to insert and extract the chip collection box.

[0036] A further preferred technical solution of the utility model is: the middle area of ​​the shell bottom of the cabin body is hollowed out, the arc-shaped elastic sheets are distributed in the hollowed-out area, and the size of the hollowed-out area is larger than the size of the arc-shaped elastic sheets;

[0037] When the chip collecting box is inserted into the concave cavity of the cabin body, the arc-shaped elastic sheet and the bottom wall of the cabin body are in the same plane.

[0038] Compared with the prior art, the advantages of the utility model are: the arc-shaped elastic sheet of the chip box in the utility model cooperates with the arc-shaped inner depression of the bottom wall of the cabin body, ensuring that the chip box can achieve stable and reliable self-locking when inserted into the concave cavity of the cabin body; the user only needs to perform simple pushing and pulling actions to complete the loading and unloading of the chip box.

[0039] The locking mechanism of the chip box reduces or even avoids the spillage of pencil shavings during cutting, reduces the cleaning and maintenance work caused by the scattered pencil shavings, and the user does not need to frequently clean the area around the pencil sharpener. In addition, the self-locking mechanism ensures that during transportation, no matter how the direction changes, the chip box will not accidentally fall out of the cavity of the cabin; because the chip box is firmly locked during transportation, the risk of damage caused by vibration or impact is reduced, and the overall reliability of the pencil sharpener is enhanced. Users do not need to worry about accidental unlocking during transportation, and can carry the pencil sharpener with more confidence, which improves users' trust and satisfaction with the product.

[0040] In addition, the shell bottom of the cabin adopts one-piece molding technology, so that there is no gap at the connection between the arc-shaped elastic sheet and the shell bottom, which enhances the stability and durability of the overall structure. Feeling the smoothness and precision of the self-locking mechanism, this instant feedback improves the overall satisfaction of users with the product.

[0041] Furthermore, the outer edge of the extension part cooperates with the corresponding arc-shaped recessed part to form a force application area for finger operation, so that the user can insert and extract the chip collection box easily. The cooperation between the arc-shaped recessed part and the extension part provides an intuitive force application point, and the user can easily insert and extract the chip collection box through the force application area.

[0042] The design of the hollow area at the bottom of the cabin not only reduces the weight of the structure, but also provides the necessary space for the arc-shaped elastic sheet to float up and down freely, ensuring the smooth operation of the self-locking mechanism. The free floating of the arc-shaped elastic sheet can quickly respond to the insertion of the chip collection box and achieve instant self-locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described object and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0044] Figure 1 The overall structure of the utility model pencil sharpener is shown in FIG. Figure 1 ;

[0045] Figure 2 The overall structure of the utility model pencil sharpener is shown in FIG. Figure 2 ;

[0046] Figure 3 The overall structure of the pencil sharpener is shown in Figure 1. Figure 1 ;

[0047] Figure 4 The overall structure of the pencil sharpener is shown in Figure 1. Figure 2 ;

[0048] Figure 5 It is a schematic diagram of the bottom structure of the pencil sharpener body;

[0049] Figure 6 It is a schematic diagram of the overall structure of the chip collecting box of the pencil sharpener;

[0050] Figure 7 It is a schematic diagram of the bottom structure of the chip collecting box of the pencil sharpener;

[0051] Figure 8 Schematic diagram of the assembly structure of the chip box and cabin Figure 1 ;

[0052] Fig. 9 Schematic diagram of the assembly structure of the chip box and cabin Figure 2 ;

[0053] Fig.10 Schematic diagram of the assembly structure of the chip box and cabin Figure 3 ;

[0054] Fig.11 Schematic diagram of the assembly structure of the chip box and cabin Figure 4 ;

[0055] Fig.12 for Fig.10 A magnified view of the local structure at point A in the middle;

[0056] Fig.13 for Fig.11 A magnified view of the local structure at B in the middle;

[0057] Fig.14 Schematic diagram of the assembly structure of the chip box and cabin Figure 5 ;

[0058] Fig.15 Schematic diagram of the assembly structure of the chip box and cabin Figure 6 . DETAILED DESCRIPTION

[0059] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It will be appreciated by those skilled in the art that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0060] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0061] like Figure 1As shown in the figure, a pencil sharpener 100 with a self-locking chip box includes a pencil sharpener body 10 and a pull-out chip box 20. The pencil sharpener body 10 includes a shell 11 and a pencil sharpening mechanism 12; the pencil sharpening mechanism 12 is arranged in the upper space of the shell 11, and the lower space of the shell 11 is provided with a cabin 13; the cabin 13 has a concave cavity for the chip box 20 to be moved in or out, and the cabin 13 includes an entrance and exit, and the concave cavity is connected to the upper space of the shell 11.

[0062] The upper space of the housing 11 is designed to accommodate the pencil sharpening mechanism 12, which has a compact structure and is easy for users to operate. The cabin 13 of the lower space is designed with a cavity for storing the chip box 20, and the size of the cavity precisely matches the size of the chip box 20, ensuring that the chip box can be smoothly moved in and out.

[0063] The technical means in this embodiment utilizes the interaction between the arc-shaped elastic piece s and the chip collecting box 20 to achieve self-locking without the need for an additional locking element. The arc-shaped elastic piece s allows the chip collecting box 20 to be automatically locked when inserted and easily released when removed, thereby improving the user experience.

[0064] Specifically, Figures 3 to 5 As shown, the cabin 13 includes a shell bottom, and the shell bottom is integrally formed with an upwardly arched arc-shaped elastic piece s; the arc-shaped elastic piece s includes a root s1 connected to the shell bottom, a highest position s3 and a free end s2. The shell bottom of the cabin 13 adopts an integral molding technology, so that there is no gap at the connection between the arc-shaped elastic piece s and the shell bottom, thereby enhancing the stability and durability of the overall structure.

[0065] The arc extension direction of the arc elastic piece s is consistent with the moving direction of the chip box 20; the chip box 20 includes a box bottom 21 and a peripheral side wall 22, the chip box 20 includes an upper opening, and the peripheral side wall 22 includes a rear wall, a left wall, a right wall and a front wall.

[0066] Preferably, the middle area of ​​the shell bottom of the cabin body 13 is hollowed out t, and the arc-shaped elastic sheet s is distributed in the hollowed-out area t, and the size of the hollowed-out area t is larger than the size of the arc-shaped elastic sheet s. The design of the hollowed-out area t not only reduces the weight of the structure, but also provides the necessary activity space for the arc-shaped elastic sheet s, so that the arc-shaped elastic sheet s can float up and down freely and elastically, ensuring the smooth operation of the self-locking mechanism. The free floating of the arc-shaped elastic sheet s can quickly respond to the insertion action of the chip box 20 and achieve instant self-locking. When inserting or extracting the chip box 20, the user will feel the smoothness and precision of the self-locking mechanism. This instant feedback improves the user's overall satisfaction with the product.

[0067] When the chip collecting box 20 is inserted into the concave cavity of the cabin 13, the arc-shaped elastic piece s is in the same plane as the bottom wall of the cabin 13. The coplanarity of the arc-shaped elastic piece s and the bottom wall provides a solid foundation, making the pencil sharpener as a whole more stable on the placement plane, reducing shaking or movement caused by pencil sharpening.

[0068] like Figure 6 and Figure 7 As shown, the bottom 21 of the box is integrally formed with an arcuate arch a, and an arcuate inner depression a1 is formed on the lower side of the arcuate arch a, and the arcuate extension direction of the arcuate arch a is consistent with the moving direction of the chip collecting box 20. This ensures that the chip collecting box 20 can be accurately positioned when inserted into the cabin 13; moreover, when the arcuate elastic sheet s slides into the arcuate inner depression a1, the generated locking force is more evenly distributed on the bottom of the chip collecting box 20, thereby enhancing the locking stability.

[0069] like Figures 7 to 14 As shown, in the process of pushing the chip box 20 into the concave cavity of the cabin body 13, when the highest position s3 of the arc-shaped elastic piece s passes over the inner starting point of the arc-shaped inner concave a1 - that is, as shown in FIG. Fig.11 and Fig.12 At the critical point shown, the arc-shaped elastic sheet s will automatically slide into the arc-shaped inner depression a1, and at the same time, the chip box 20 is locked in the concave cavity of the cabin 13 by the arc-shaped elastic sheet s. This self-locking mechanism is the creative contribution of the utility model. It can not only realize the flexible self-locking of the chip box 20, but also easily pull the chip box 20 outward under a small external force; it can also effectively prevent the pencil shavings in the chip box 20 from overflowing. Including when cutting, the locking mechanism between the chip box 20 and the cabin 13 reduces the cleaning and maintenance work caused by the scattering of pencil shavings, and the user does not need to frequently clean the area around the pencil sharpener. Also, during transportation, the chip box 20 can avoid accidentally falling out of the concave cavity of the cabin 13 based on the self-locking mechanism.

[0070] When in use, the user only needs to simply push the chip collecting box 20 to achieve automatic locking without performing complicated operations or using additional locking devices.

[0071] In addition, the self-locking mechanism ensures that the chip box 20 will not accidentally fall out of the cavity of the cabin 13 regardless of the direction during transportation; since the chip box 20 is firmly locked during transportation, the risk of damage caused by vibration or impact is reduced, and the overall reliability of the pencil sharpener is enhanced. Users do not need to worry about accidental unlocking during transportation, and can carry the pencil sharpener with more confidence, which improves users' trust and satisfaction with the product.

[0072] Preferably, the horizontal height of the free end s2 is greater than the root s1; when the chip box 20 is inserted, the free end s2 can automatically adapt to the bottom 21 of the chip box and provide additional locking force during the self-locking process. The free end s2 is closer to the entrance and exit of the cavity than the root s1. The higher horizontal height design of the free end s2 ensures that when the chip box 20 is inserted, the free end s2 can be more effectively engaged with the arc-shaped inner recess a1 to form a more secure locking state.

[0073] Since the free end s2 is closer to the entrance and exit of the cavity, it can contact the bottom 21 of the chip box 20 earlier during the insertion or extraction of the chip box 20, thereby providing a more stable guiding effect. When inserting the chip box 20, the user will feel clear feedback that the free end s2 contacts the bottom 21.

[0074] An arc-shaped transition surface r is provided between the rear wall and the bottom 21 of the box to guide the free end of the arc-shaped elastic sheet into the arc-shaped inner recess a1 of the bottom of the box. The provision of the arc-shaped transition surface r enables the free end s2 of the arc-shaped elastic sheet s to slide more smoothly into the arc-shaped inner recess a1, thereby reducing the resistance during the locking process and improving the locking efficiency.

[0075] The user will feel a smoother operation process when inserting the chip collecting box 20, and the existence of the arc-shaped transition surface r makes the entire insertion action more natural without the need for additional force, thereby reducing the occurrence of friction and extrusion between components caused by improper operation.

[0076] The arc-shaped elastic sheet s is located in the middle of the bottom of the shell, and forms an inner flat bottom and an outer flat bottom at the bottom of the shell; the arc-shaped arched portion a is located in the middle of the bottom of the box, and forms an inner flat bottom and an outer flat bottom at the bottom of the box; the chip collecting box falls completely into the concave cavity a1, the inner flat bottom of the box is located above the inner flat bottom of the shell, and the outer flat bottom of the box is located above the outer flat bottom of the shell.

[0077] The corresponding relationship between the flat bottom inside the shell and the flat bottom inside the box, as well as the corresponding relationship between the flat bottom outside the shell and the flat bottom outside the box, and the overlapping relationship between the bottom walls of the two components strengthen the locking relationship between the cabin body 13 and the chip collection box 20, provide an additional mechanical support effect, and enhance the locking strength between the chip collection box 20 and the cabin body 13.

[0078] The outer walls on both sides of the entrance and exit of the cabin 13 are provided with arc-shaped recessed parts v2 inclined inwardly; the front walls of the chip collecting box 20 are designed with extension parts v1 on both sides, and the extension parts v1 cover the front side of the arc-shaped recessed parts v2. The arc-shaped recessed parts v2 are ergonomically designed to ensure that the user feels comfortable when operating.

[0079] The outer edge v3 of the extension v1 cooperates with the corresponding arc-shaped recessed portion v2 to form a force application area p for finger operation, so that the user can insert and extract the chip box 20. The cooperation between the arc-shaped recessed portion v2 and the extension v1 provides an intuitive force application point, and the user can easily insert and extract the chip box 20 through the force application area p.

[0080] In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or the directions or positional relationships in which the utility model product is usually placed when in use, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. "First" and "second" are only for the purpose of making the description easier to understand, without any other directional meaning, and cannot be used as a limitation on the present utility model.

[0081] The above is an introduction to the pencil sharpener with a self-locking chip collection box provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the utility model and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A pencil sharpener with a self-locking chip collection box, characterized in that: The utility model comprises a pencil sharpener body and a pull-out chip collecting box, wherein the pencil sharpener body comprises a shell and a pencil sharpening mechanism; the pencil sharpening mechanism is arranged in the upper space of the shell, and a cabin is arranged in the lower space of the shell; the cabin has a concave cavity for the chip collecting box to be moved in or out, the cabin comprises an inlet and outlet, and the concave cavity is communicated with the upper space of the shell; The cabin body comprises a shell bottom, and the shell bottom is integrally formed with an arc-shaped elastic sheet arched upward; the arc-shaped extension direction of the arc-shaped elastic sheet is consistent with the moving direction of the chip collecting box; The chip collecting box comprises a box bottom, the box bottom is integrally formed with an arc-shaped arched portion, and an arc-shaped inner depression is formed on the lower side of the arc-shaped arched portion, and the arc-shaped extension direction of the arc-shaped arched portion is consistent with the moving direction of the chip collecting box; During the process of moving the chip collecting box into the concave cavity of the cabin body, when the arc-shaped elastic sheet enters into the arc-shaped inner depression, the chip collecting box is locked in the concave cavity by the arc-shaped elastic sheet.

2. The pencil sharpener with a self-locking chip collection box according to claim 1, characterized in that: The arc-shaped elastic piece includes a root portion connected to the bottom of the shell and a free end, and the horizontal height of the free end is greater than that of the root portion.

3. The pencil sharpener with a self-locking chip box according to claim 2, characterized in that: The free end is closer to the entrance and exit of the cavity than the root.

4. The pencil sharpener with a self-locking chip collection box according to claim 1, characterized in that: The arc-shaped elastic sheet is located in the middle of the shell bottom, and forms a flat bottom inside the shell and a flat bottom outside the shell at the shell bottom; The arc-shaped arched portion is located in the middle of the bottom of the box, and forms an inner flat bottom and an outer flat bottom on the bottom of the box; The chip collecting box completely falls into the concave cavity, the inner flat bottom of the box is located above the inner flat bottom of the shell, and the outer flat bottom of the box is located above the outer flat bottom of the shell.

5. The pencil sharpener with a self-locking chip collection box according to claim 1, characterized in that: The chip box includes a box bottom and surrounding side walls, the chip box includes an upper opening, and the surrounding side walls include a rear wall, a left wall, a right wall and a front wall; an arc-shaped transition surface is provided between the rear wall and the box bottom to facilitate guiding the free end of the arc-shaped elastic sheet to enter the box bottom.

6. Pencil sharpener with self-locking chip box, characterized in that include: A pencil sharpener body and a pull-out chip collection box, wherein the pencil sharpener body comprises a housing and a pencil sharpening mechanism; The pencil sharpening mechanism is arranged in the upper space of the shell, and the lower space of the shell is provided with a cabin; the cabin has a concave cavity for the chip collecting box to be moved in or out, the cabin includes an inlet and outlet, and the concave cavity is communicated with the upper space of the shell; The cabin body comprises a shell bottom, and the shell bottom is integrally formed with an arc-shaped elastic sheet arched upward; the arc-shaped elastic sheet comprises a root portion connected to the shell bottom, a highest position and a free end; The arc-shaped extension direction of the arc-shaped elastic sheet is consistent with the moving direction of the chip collecting box; The chip collecting box comprises a box bottom and peripheral side walls, the chip collecting box comprises an upper opening, and the peripheral side walls comprise a rear wall, a left wall, a right wall and a front wall; The bottom of the box is integrally formed with an arc-shaped arched portion, and an arc-shaped inner depression is formed on the lower side of the arc-shaped arched portion, and the arc-shaped extension direction of the arc-shaped arched portion is consistent with the moving direction of the chip collecting box; During the process of pushing the chip box into the concave cavity of the cabin body, when the highest position of the arc-shaped elastic sheet passes the inner starting point of the arc-shaped inner recess, the arc-shaped elastic sheet will automatically slide into the arc-shaped inner recess, and the chip box is locked in the concave cavity of the cabin body by the arc-shaped elastic sheet.

7. The pencil sharpener with a self-locking chip box according to claim 6, characterized in that: The horizontal height of the free end is greater than that of the root; The free end is closer to the entrance and exit of the cavity than the root.

8. The pencil sharpener with a self-locking chip box according to claim 6, characterized in that: An arc-shaped transition surface is provided between the rear wall and the bottom of the box, so as to guide the free end of the arc-shaped elastic sheet to enter the bottom of the box.

9. A pencil sharpener with a self-locking chip box, characterized in that include: A pencil sharpener body and a pull-out chip collection box, wherein the pencil sharpener body comprises a housing and a pencil sharpening mechanism; The pencil sharpening mechanism is arranged in the upper space of the shell, and the lower space of the shell is provided with a cabin; the cabin has a concave cavity for the chip collecting box to be moved in or out, the cabin includes an inlet and outlet, and the concave cavity is communicated with the upper space of the shell; The cabin body comprises a shell bottom, the shell bottom is integrally formed with an upwardly arched arc-shaped elastic sheet, the arc-shaped elastic sheet is located in the middle of the shell bottom, and forms a flat bottom inside the shell and a flat bottom outside the shell at the shell bottom; the arc-shaped elastic sheet comprises a root connected to the shell bottom, a highest position and a free end; The arc-shaped extension direction of the arc-shaped elastic sheet is consistent with the moving direction of the chip collecting box; The bottom of the chip collecting box is integrally formed with an arc-shaped arched portion, the arc-shaped arched portion is located in the middle of the bottom of the box, and forms an inner flat bottom and an outer flat bottom at the bottom of the box; and an arc-shaped inner depression is formed on the lower side of the arc-shaped arched portion, and the arc-shaped extension direction of the arc-shaped arched portion is consistent with the moving direction of the chip collecting box; In the process of pushing the chip box into the concave cavity of the cabin body, when the highest position of the arc-shaped elastic sheet passes the inner starting point of the arc-shaped inner depression, the arc-shaped elastic sheet will automatically slide into the arc-shaped inner depression, and at the same time, the chip box is locked in the concave cavity of the cabin body by the arc-shaped elastic sheet; at this time, the flat bottom inside the box is located above the flat bottom inside the shell, and the flat bottom outside the box is located above the flat bottom outside the shell.

10. The pencil sharpener with a self-locking chip box according to claim 9, characterized in that: The horizontal height of the free end is greater than that of the root; The free end is closer to the entrance and exit of the cavity than the root; An arc-shaped transition surface is provided between the rear wall of the chip collecting box and the bottom of the box, so as to guide the free end of the arc-shaped elastic sheet to enter the bottom of the box.

11. The pencil sharpener with a self-locking chip box according to claim 9, characterized in that: The outer walls on both sides of the entrance and exit of the cabin body are provided with arc-shaped recessed parts inclined inwards; the front wall of the chip collecting box is designed with extension parts on both sides, and the extension parts are covered on the front side of the arc-shaped recessed parts; The outer edge of the extension portion cooperates with the corresponding arc-shaped recessed portion to form a force application area for finger operation, so as to facilitate the user to insert and extract the chip collection box.

12. The pencil sharpener with a self-locking chip box according to claim 11, characterized in that: The middle area of ​​the shell bottom of the cabin body is hollowed out, the arc-shaped elastic sheets are distributed in the hollowed-out area, and the size of the hollowed-out area is larger than the size of the arc-shaped elastic sheets; When the chip collecting box is inserted into the concave cavity of the cabin body, the arc-shaped elastic sheet and the bottom wall of the cabin body are in the same plane.

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