CN219544392U

CN219544392U - Automatic pencil sharpener capable of preventing dust leakage

Info

Publication number: CN219544392U
Application number: CN202320565298.5U
Authority: CN
Inventors: 郑高伟; 曹锋; 张俊峰
Original assignee: Ningbo Tiantian Stationery Co ltd
Current assignee: Ningbo Tiantian Stationery Co ltd
Priority date: 2023-03-21
Filing date: 2023-03-21
Publication date: 2023-08-18
Anticipated expiration: 2033-03-21

Abstract

The utility model discloses an automatic pencil sharpener capable of preventing dust leakage, which comprises an upper cover and a pencil rest cover, wherein the upper cover is provided with a matching groove, the matching groove is used for enabling the upper end of a worm to extend into the upper cover and is in transmission connection with a pencil feeding and withdrawing assembly, and the pencil rest cover is provided with a shoulder part used for covering an opening at the lower end of the matching groove. The utility model provides an automatic pencil sharpener capable of preventing ash leakage, which is characterized in that a shoulder part for covering an opening at the lower end of a matching groove is arranged on a knife rest cover, so that the entry of pencil ash or wood dust in the matching groove is reduced, and the cleanliness in an upper cover is improved.

Description

Automatic pencil sharpener capable of preventing dust leakage

Technical Field

The utility model relates to the technical field of pencil sharpener, in particular to an automatic pencil sharpener capable of preventing dust leakage.

Background

The automatic pencil sharpener is a novel stationery with automatic pencil feeding and returning functions, and the pencil feeding and returning assembly comprises two pencil feeding rubber rollers which are arranged in parallel, and the two pencil feeding rubber rollers synchronously and reversely rotate to feed pencil or return pencil. The driving modes of the existing pen feeding and retracting assembly are roughly divided into the following modes:

1. the bottom of the pen feeding and withdrawing assembly is provided with a turbine, the turbine is connected with the upper end of the cutter frame assembly when the upper cover is covered, and the turbine synchronously rotates along with the cutter frame assembly to drive the pen feeding and withdrawing assembly to operate, wherein the pen feeding and withdrawing mode is switched by changing the rotating direction of the cutter frame assembly;

2. a second driving unit is additionally arranged in the upper cover, the pen feeding and retreating assembly is directly driven to operate by the second driving unit, and the pen feeding and retreating mode is switched by changing the steering direction of an output shaft of the second driving unit;

the company develops a new scheme different from the two driving modes, and the worm is additionally arranged, so that when the upper cover is covered, the worm extends into the upper cover and is meshed with the pen feeding and retreating assembly. The motor is used for driving the worm to rotate to drive the pen feeding and withdrawing assembly to operate, and the pen feeding and withdrawing mode is switched by changing the steering direction of the worm. However, during the test, designers find that pencil dust or wood chips cut by the cutter holder assembly easily enter the spiral tooth portion of the worm, and the cleanliness inside the pencil sharpener is affected.

Disclosure of Invention

The present utility model aims to solve one of the technical problems in the related art to a certain extent. Therefore, the utility model provides an automatic pencil sharpener capable of preventing dust leakage, which is characterized in that a shoulder part for covering the opening at the lower end of a matching groove is arranged on a pencil rest cover, so that the entry of pencil dust or wood dust in the matching groove is reduced, and the cleanliness in an upper cover is improved.

The technical scheme adopted by the utility model is as follows: the utility model provides an automatic pencil sharpener of ash leakage prevention, including upper cover and knife rest cover, the upper cover has the cooperation groove, the cooperation groove is used for supplying worm upper end to stretch into its inside and with advance and withdraw the pen subassembly transmission to be connected, the knife rest cover is last to have and is used for covering cooperation groove lower extreme open-ended shoulder.

After adopting above structure, when the upper cover is closed, the worm can stretch into inside the upper cover and link to each other with advancing and moving back the pen subassembly, and the effect of worm is with power transmission to advance on moving back the pen subassembly. By changing the direction of the worm, the pen-feeding and withdrawing modes can be switched. At this time, the shoulder on the holder cover can cover the opening of the lower end of the matching groove to reduce the entry of pencil dust or wood dust into the matching groove, thereby improving the cleanliness of the inside of the upper cover.

According to one embodiment of the utility model, the upper surface of the shoulder extends upwards to form an ash blocking cover, and the spiral tooth part of the worm is positioned in the ash blocking cover; the spiral teeth are positioned in the ash blocking cover, and the exposed area of the spiral teeth is reduced, so that the probability of staining pencil ash on the surface of the worm is reduced, and the cleaning degree is improved.

According to one embodiment of the utility model, the side wall of the ash blocking cover is provided with a notch; the spiral tooth part is in transmission connection with the pen feeding and retreating assembly through the notch.

According to one embodiment of the utility model, the inner wall of the matching groove extends to form an ash blocking rib; the dust blocking ribs can prevent dust from entering the upper cover to a certain extent.

According to one embodiment of the utility model, the head housing is rotatably connected to the upper cover.

According to one embodiment of the utility model, the upper cover is provided with a positioning part, and the tool rest cover is provided with a fastening part which is in snap connection with the positioning part.

According to one embodiment of the utility model, at least one pen feeding rubber roller in the pen feeding and retreating assembly is coaxially provided with a connecting gear.

According to one embodiment of the utility model, the tool rest cover further comprises a shifting fork rod which is arranged in parallel with the worm, and the tool rest cover is provided with a matching hole.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic view of an automatic pencil sharpener according to an embodiment of the present utility model;

FIG. 2 is a perspective view of an automatic pencil sharpener according to an embodiment of the present utility model;

FIG. 3 is a perspective view of a tool post cover in an embodiment of the utility model;

FIG. 4 is a schematic view of the structure of the bottom of the upper cover according to the embodiment of the utility model;

FIG. 5 is a schematic view of the connection of the lower housing to the worm in an embodiment of the present utility model;

fig. 6 is a schematic structural diagram of the lower housing according to an embodiment of the utility model.

The reference numerals in the figures illustrate:

1. an upper cover; 2. a carriage assembly; 3. a head cover; 4. a worm; 5. a fork lever; 6. a connecting gear; 7. a pen feeding and retracting assembly;

11. a lower housing; 12. an upper housing; 13. a mating groove; 14. ash blocking ribs; 15. a positioning part;

31. a main body; 32. a shoulder; 33. an ash blocking cover; 34. a mating hole; 35. a notch; 36. a fastening part;

41. helical teeth.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

As shown in fig. 1-6, in this embodiment, an automatic pencil sharpener capable of preventing dust leakage is disclosed, which comprises an upper cover 1 and a pencil rest cover 3, wherein the upper cover 1 is provided with a matching groove 13, the matching groove 13 is used for allowing the upper end of a worm 4 to extend into the upper cover and be in transmission connection with a pencil feeding and withdrawing component 7, and the pencil rest cover 3 is provided with a shoulder 32 for covering the opening at the lower end of the matching groove 13.

Further, as shown in fig. 4, in this embodiment, the cutter holder assembly 2 is located inside the cutter holder cover 3, and the upper cover 1 is rotatably connected to the pencil sharpener body. In order to increase the binding force between the upper cover 1 and the tool rest cover 3, the reaction force generated when the worm 4 and the pen feeding and withdrawing assembly 7 are driven is reduced. The upper cover 1 and the tool rest cover 3 are also connected in a rotary way. A matching groove 13 which is approximately arc-shaped is formed at the bottom of the upper cover 1, and the arc takes the central axis of the upper cover 1 as the center of a circle, namely takes the center of a pen inlet hole in the upper cover 1 as the center of a circle.

Further, in the present embodiment, the upper cover 1 includes a lower housing 11 and an upper housing 12, and the upper housing 12 and the lower housing 11 are covered to form a hollow shell structure. As shown in fig. 5, two pen feed rollers of the pen feed/withdrawal assembly 7 are rotatably mounted on the lower housing 11. One of the pen feeding rubber rollers is coaxially provided with a connecting gear 6. When the upper cover 1 is covered, the upper end of the worm 4 stretches into the matching groove 13, and the spiral tooth part 41 of the worm 4 is meshed with the connecting gear 6.

Further, as shown in fig. 1 and 2, in this embodiment, the worm 4 is vertically disposed, and a gear is sleeved at the bottom, the gear is in spline connection with the worm 4, and the gear can move relative to the worm 4 along the axial direction of the worm 4. During the moving process, the shifting gears are meshed with various stages of gears with different steering directions in the reduction gear set. When the motor drives the reduction gear set, the worm 4 is driven to synchronously rotate through the gear shifting gear. The pen feeding and retracting assembly 7 is driven to work by the meshing connection of the spiral tooth part 41 and the connecting gear 6.

Further, in the present embodiment, since the bottom surface of the lower case 11 has a planar structure, the upper end surface of the main body 31 of the head cover 3 has a plane that is bonded to the planar structure. The shoulder 32 is formed by extending horizontally outward from the upper edge of the body 31 of the head cover 3, and the upper surface of the shoulder 32 is flush with the upper surface of the head cover 3.

Specifically, as shown in connection with fig. 3, the upper surface of the shoulder 32 extends upward to form an ash blocking cover 33, and the spiral tooth portion 41 of the worm 4 is located in the ash blocking cover 33.

Further, when the upper cover 1 is rotatably connected to the holder cover 3, the entirety of the ash blocking cover 33 needs to be inserted into the fitting groove 13. Part of the upper surface of the shoulder 32 extends upward to form an ash blocking cover 33, and the side wall of the ash blocking cover 33 encloses a circle. Wherein, the bottom of the ash blocking cover 33 is provided with a through hole, and the bottom end of the worm 4 passes through and extends out of the through hole by penetrating through the two ends of the upper end of the tool rest cover 3.

Specifically, a notch 35 is provided on the side wall of the ash blocking cover 33; the screw tooth 41 is in driving connection with the pen feeding and retracting assembly 7 through the notch 35.

Specifically, as shown in fig. 5 and 6, the inner wall of the matching groove 13 extends to form an ash blocking rib 14; the provision of the ash blocking rib 14 can prevent dust from entering the inside of the upper cover 1 to some extent.

Specifically, as shown in fig. 3 and fig. 4, the upper cover 1 is provided with a positioning portion 15, and the holder cover 3 is provided with a fastening portion 36 that is in snap connection with the positioning portion 15.

Further, in the present embodiment, the bottom of the lower housing 11 is symmetrically provided with the positioning portion 15, two sides of the upper end edge of the main body 31 of the tool rest cover 3 horizontally extend outwards to form the fastening portion 36, and the rotational connection between the tool rest cover 3 and the upper cover 1 is realized through the rotational cooperation of the positioning portion 15 and the fastening portion 36.

Specifically, as shown in fig. 2, the automatic pencil sharpener further comprises a shifting fork 5 parallel to the worm 4, and the holder cover 3 is provided with a matching hole 34.

Further, in this embodiment, the shift rod 5 may rotate around its own axis relative to the head rest cover 3, and in the process of rotation, the cam mechanism on the shift rod 5 drives the shift gears to move up and down, so that the shift gears are respectively meshed with the gears of different stages with different steering directions in the reduction gear set. The steering direction of the worm 4 is changed along with the change, so that the pen feeding operation and the pen withdrawing operation of the pen feeding and withdrawing assembly 7 are switched.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims

1. An automatic pencil sharpener of leak protection ash, its characterized in that: the automatic pen feeding and withdrawing device comprises an upper cover and a knife rest cover, wherein the upper cover is provided with a matching groove, the matching groove is used for enabling the upper end of a worm to extend into the upper cover and is in transmission connection with a pen feeding and withdrawing assembly, and the knife rest cover is provided with a shoulder part used for covering the opening of the lower end of the matching groove.

2. The automatic pencil sharpener against ash leakage according to claim 1, wherein: the upper surface of the shoulder extends upwards to form an ash blocking cover, and the spiral tooth part of the worm is positioned in the ash blocking cover.

3. The automatic pencil sharpener against ash leakage according to claim 2, wherein: the side wall of the ash blocking cover is provided with a notch.

4. The automatic pencil sharpener against ash leakage according to claim 1, wherein: the inner wall of the matching groove extends to form an ash blocking rib.

5. The automatic pencil sharpener against ash leakage according to claim 1, wherein: the tool rest cover is rotatably connected with the upper cover.

6. The automatic pencil sharpener against leakage of dust as in claim 5, wherein: the upper cover is provided with a positioning part, and the tool rest cover is provided with a fastening part which is in buckling connection with the positioning part.

7. The automatic pencil sharpener against ash leakage according to claim 1, wherein: at least one pen feeding rubber roller in the pen feeding and retreating assembly is coaxially provided with a connecting gear.

8. The automatic pencil sharpener against ash leakage according to claim 1, wherein: the tool rest cover is characterized by further comprising a shifting fork rod which is arranged in parallel with the worm, and the tool rest cover is provided with a matching hole.