CN219277100U - Automatic pencil sharpener - Google Patents

Abstract

The utility model discloses an automatic pencil sharpener, which comprises: a pen feeding assembly; the driving fluted disc is in meshed connection with the pen feeding assembly and is used for driving the pen feeding assembly to feed and withdraw a pen; a pencil sharpening assembly movable in a direction toward or away from the driving toothed disc between a connected position in which the pencil sharpening assembly maintains torque transmission with the driving toothed disc and a disconnected position in which the pencil sharpening assembly disconnects torque transmission with the driving toothed disc; the first elastic piece is positioned between the pencil sharpening assembly and the middle shell and has an elastic trend for keeping the pencil sharpening assembly at the connecting position. The utility model provides an automatic pencil sharpener, which is characterized in that a first elastic piece is added between a pencil sharpening assembly and a middle shell to enable the pencil sharpening assembly to float, and the pencil feeding is utilized to drive the pencil sharpening assembly to integrally move to a disconnection position, so that power transmission between a disconnection driving fluted disc and the pencil sharpening assembly is realized, and the pencil point is protected.

Description

Automatic pencil sharpener

Technical Field

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

Background

The automatic pencil sharpener is also called an electric pencil sharpener, and the pencil sharpener is generally driven by a motor to drive a pencil sharpening assembly to rotate, the pencil sharpening assembly frame drives a pencil feeding assembly to feed a pencil in the rotating process, and the pencil is driven by the pencil feeding assembly to perform pencil sharpening.

In order to make the cut nib have a smooth surface, it is necessary to perform time-lapse pencil sharpening between pencil sharpening completion. Because the pencil feeding of the pencil feeding component and the pencil sharpening of the pencil sharpening component are synchronously carried out. In the time-delay pencil sharpening process, if the power transmission between the pencil feeding component and the pencil sharpening component is not timely disconnected to stop pencil feeding, the pressure of the cut pencil feeding and the pencil blocking block are offset, and the broken pencil is easy to generate.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, the utility model provides an automatic pencil sharpener, wherein a first elastic piece is added between a pencil sharpening assembly and a middle shell to enable the pencil sharpening assembly to float, and the pencil feeding of a pencil is utilized to drive the pencil sharpening assembly to integrally move to a disconnection position, so that power transmission between a disconnection driving fluted disc and the pencil sharpening assembly is realized, and the pencil point is protected.

The technical scheme adopted by the utility model is as follows: provided is an automatic pencil sharpener, comprising:

a pen feeding assembly;

the driving fluted disc is in meshed connection with the pen feeding assembly and is used for driving the pen feeding assembly to feed and withdraw a pen;

a pencil sharpening assembly movable in a direction toward or away from the driving toothed disc between a connected position in which the pencil sharpening assembly maintains torque transmission with the driving toothed disc and a disconnected position in which the pencil sharpening assembly disconnects torque transmission with the driving toothed disc;

the first elastic piece is positioned between the pencil sharpening assembly and the middle shell and has an elastic trend for keeping the pencil sharpening assembly at the connecting position.

After the structure is adopted, the pencil sharpening assembly is kept at a position close to the driving fluted disc under the action of the first elastic piece, namely, the pencil sharpening assembly is kept at a connecting position, and the pencil sharpening assembly has a suspension effect. In the pencil feeding process, the pencil sharpening assembly is continuously driven to move from the connecting position to the disconnecting position, the first elastic piece is compressed until the pencil sharpening assembly integrally moves to the disconnecting position, and power transmission between the disconnecting driving fluted disc and the pencil sharpening assembly is realized. The pencil sharpening assembly continues to sharpen pencil for delayed pencil sharpening, and the pencil feeding assembly loses the driving force of the driving fluted disc to stop pencil feeding, so that the cut pencil lead does not move opposite to the pencil blocking block to cause the occurrence of pencil breakage, and the pencil lead is protected.

According to one embodiment of the utility model, a transmission shaft is inserted into the pencil sharpening assembly, moves along with the pencil sharpening assembly, and the transmission shaft keeps torque transmission with the pencil sharpening assembly during the movement; the drive shaft is used for transmitting power from the drive assembly to the pencil sharpening assembly.

According to one embodiment of the utility model, a drive shaft is mated with the pencil sharpener assembly, the pencil sharpener assembly maintaining torque transfer with the drive shaft during movement between the connected and disconnected positions.

According to one embodiment of the utility model, the outer periphery of the transmission shaft is outwards protruded to form a boss part, a second elastic piece is sleeved on the outer periphery of the transmission shaft, and the upper end of the second elastic piece is abutted with the boss part; the boss portion is arranged to provide a supporting point for the second elastic member to bear force.

According to one embodiment of the utility model, the automatic pencil sharpener further comprises a support member, an upper portion of the first elastic member being in abutment with a lower portion of the support member, an upper portion of the support member being for abutment with the pencil sharpening assembly; the support piece is used for increasing the contact area with the bottom of the pencil sharpening assembly, so that the first elastic piece can support the pencil sharpening assembly more stably.

According to one embodiment of the utility model, a first connecting part is arranged on one side, far away from the pen feeding assembly, of the driving fluted disc, and a second connecting part matched with the first connecting part is arranged at the upper end of the cutter rest in the pen cutting assembly; the first connecting part and the second connecting part are spliced, so that the first connecting part and the second connecting part can axially move and circumferentially remain fixed, and even if the first connecting part and the second connecting part form a clutch connecting structure, the transmission of torque can be kept or disconnected.

According to one embodiment of the utility model, a turbine part for meshed connection with the pen feeding assembly is arranged on one side, close to the pen feeding assembly, of the driving fluted disc.

According to one embodiment of the utility model, the automatic pencil sharpener comprises a housing and an upper cover in cover connection with the housing, wherein the driving fluted disc and the pencil inlet assembly are both arranged in the upper cover.

According to one embodiment of the utility model, the shell is provided with a scrap cavity, the middle shell is positioned at the bottom of the scrap cavity, a supporting table is fixedly installed in the shell, the supporting table and the middle shell cover form an installation space, and a gear seat coaxially arranged with the transmission shaft is arranged in the installation space.

According to one embodiment of the utility model, the drive shaft remains in torque transmission with the gear seat during movement.

Drawings

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

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

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

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a partial enlarged view at B in FIG. 3;

FIG. 5 is an enlarged view of a portion of FIG. 3 at C;

FIG. 6 is a partial exploded view of the automatic pencil sharpener according to the present utility model;

FIG. 7 is a partial exploded view of the automatic pencil sharpener of FIG. 6 after removal of the center housing;

FIG. 8 is a partial enlarged view at D in FIG. 7;

FIG. 9 is a partial perspective view of an automatic pencil sharpener according to an embodiment of the present utility model;

FIG. 10 is a partial cross-sectional view of an automatic pencil sharpener in accordance with an embodiment of the present utility model;

FIG. 11 is a perspective view of a pencil sharpener assembly according to an embodiment of the present utility model;

FIG. 12 is a perspective view of a driving cog according to an embodiment of the present utility model;

FIG. 13 is a schematic view of a driving gear disc according to an embodiment of the present utility model;

FIG. 14 is a cross-sectional view of an automatic pencil sharpener in accordance with an embodiment of the present utility model;

fig. 15 is a partial enlarged view at E in fig. 14.

The reference numerals in the figures illustrate:

1. a housing; 2. an upper cover; 3. driving the fluted disc; 4. a pencil sharpening assembly; 5. a middle shell; 6. a transmission shaft; 7. a first elastic member; 8. a support; 9. a second elastic member; 10. a gear seat; 11. a support table; 12. a pen feeding assembly;

1a, a scrap cavity;

31. a turbine section; 32. a first connection portion;

41. a tool holder; 42. a second connecting portion;

61. a boss portion; 62. a free end.

Description of the embodiments

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 to 15, an automatic pencil sharpener is disclosed in this embodiment, comprising:

a pen feed assembly 12;

the driving fluted disc 3 is in meshed connection with the pen feeding assembly 12 and is used for driving the pen feeding assembly 12 to feed and withdraw a pen;

a pencil sharpening assembly 4 movable in a direction approaching or separating from the driving toothed disc 3 between a connection position in which the pencil sharpening assembly 4 maintains torque transmission with the driving toothed disc 3 and a disconnection position in which the pencil sharpening assembly 4 disconnects torque transmission with the driving toothed disc 3;

a first elastic member 7 located between the pencil sharpener assembly 4 and the middle case 5, and the first elastic member 7 has an elastic tendency to keep the pencil sharpener assembly 4 in a connected position.

Further, as shown in fig. 2 to 4, the pencil sharpener is vertically placed and comprises an upper cover 2, a housing 1, a middle cover and a supporting table 11 from top to bottom. Wherein upper cover 2 is connected with casing 1 lid, and upper cover 2, casing 1 and well lid enclose and form sweeps chamber 1a. The pencil sharpening assembly 4 is positioned in the scrap cavity 1a, the lower end of the pencil sharpening assembly is spliced with the transmission shaft 6, and the upper end of the pencil sharpening assembly is spliced with the driving fluted disc 3. The driving fluted disc 3 and the pen feeding assembly 12 are both arranged in the upper cover 2.

Further, in this embodiment, a driving assembly is mounted on the support table 11, the driving assembly includes a motor and a reduction gear set, a spur gear engaged with an input gear of the reduction gear set is disposed on the motor shaft, and the reduction gear set is engaged with a gear seat 10 disposed on the support table 11.

Further, as shown in connection with fig. 3 and 5, the pencil sharpener assembly 4 of fig. 5 is shown in the attached position. The pencil sharpening assembly 4 includes a cutter holder 41, a hob mounted on the cutter holder 41, and a pencil block slidably mounted on the cutter holder 41. The upper shell is provided with a gear ring which is meshed with the hob.

The pencil sharpener assembly 4 of fig. 15 is shown in a disconnected position in combination with fig. 14 and 15. The bottom of the driving fluted disc 3 is provided with a first connecting part 32, and the upper end of the tool rest 41 is provided with a second connecting part 42. In this embodiment, the first connecting portion 32 adopts a socket structure, the second connecting portion 42 adopts a plug structure, and a spline structure is provided therebetween, so that the two can move axially while keeping the circumferential direction fixed.

In another embodiment, the first connecting portion 32 is in a plug structure, the second connecting portion 42 is in a socket structure, and a spline structure is arranged between the first connecting portion and the second connecting portion, so that the first connecting portion and the second connecting portion can move axially while being kept circumferentially fixed.

Specifically, as shown in fig. 9 and 10, the driving shaft 6 inserted into the pencil sharpening assembly 4 moves along with the pencil sharpening assembly 4, and the driving shaft 6 keeps torque transmission with the pencil sharpening assembly 4 in the moving process, a boss portion 61 is formed by protruding outwards of the periphery of the driving shaft 6, a second elastic member 9 is sleeved on the periphery of the driving shaft 6, and the upper end of the second elastic member 9 abuts against the boss portion 61, and the lower end abuts against the gear seat 10.

Further, as shown in connection with fig. 8, in the present embodiment, a boss portion 61 is formed to protrude outward from the middle of the drive shaft 6, and the drive shaft 6 at the upper portion of the boss portion 61 has a free end 62 for engagement with the pencil assembly 4. The transmission shaft 6 at the lower part of the boss part 61 is axially movably inserted into the gear seat 10, and the transmission shaft 6 keeps torque transmission with the gear seat 10 in the process of axially moving relative to the gear seat 10.

Specifically, the automatic pencil sharpener further comprises a support member 8, wherein the upper part of the first elastic member 7 is abutted against the lower part of the support member 8, and the upper part of the support member 8 is used for being abutted against the pencil sharpening assembly 4.

Further, in the present embodiment, the supporting member 8 is fitted around the outer circumference of the transmission shaft 6 and is movable up and down with respect to the middle housing 5. The upper part of the first elastic piece 7 is abutted with the lower part of the supporting piece 8, the upper surface of the middle shell 5 is downwards sunken to form a groove, and the lower part of the first elastic piece 7 is abutted with the bottom of the groove.

Further, in the present embodiment, the support 8 is hollow, and the free end 62 of the drive shaft 6 extends beyond the support 8.

Specifically, as shown in fig. 12 and 13, a first connecting portion 32 is provided on a side of the driving fluted disc 3 away from the pen feeding assembly 12, a second connecting portion 42 adapted to the first connecting portion 32 is provided at an upper end of the tool holder 41 in the pen cutting assembly 4, and a turbine portion 31 for engaging and connecting with the pen feeding assembly 12 is provided on a side of the driving fluted disc 3 close to the pen feeding assembly 12.

Specifically, the casing 1 has sweeps chamber 1a, well shell 5 is located the bottom in sweeps chamber 1a, fixed mounting has supporting bench 11 in the casing 1, supporting bench 11 with well shell 5 lid closes and forms the installation space, and be equipped with in the installation space with gear seat 10 that transmission shaft 6 coaxial setting.

In this embodiment, the working principle of the automatic pencil sharpener is as follows:

after the pencil is inserted into the pencil inlet hole on the upper cover 2, the pencil body triggers the sliding block, and the sliding block triggers the pencil inlet switch through the connecting rod. The control circuit on the automatic pencil sharpener receives the coupling signal from the pencil inlet switch, controls the driving motor in the driving assembly to work, and the motor shaft of the driving motor drives the reduction gear set, and the output gear in the reduction gear set drives the pencil sharpening assembly 4 to rotate through the connection of the gear seat 10 and the transmission shaft 6 in sequence. The tool rest 41 in the connecting position drives the pen feeding assembly 12 to perform pen feeding action through the driving fluted disc 3. The pencil feeding assembly 12 drives the pencil to automatically feed, and the pencil enters the tool rest 41 and is cut by the pencil cutting assembly 4, and the cut scraps are thrown into the scrap cavity 1a.

After the pencil advances and cuts the nib of preset thickness, the pencil top moves the pencil sharpening assembly 4 wholly downwards, the first elastic piece 7 and the second elastic piece 9 are gradually compressed, and when the pencil sharpening assembly 4 moves from the connecting position to the disconnecting position, the pencil sharpening assembly 4 and the driving gear disconnect the transmission of torque. The drive shaft 6 follows the downward movement of the pencil assembly 4 and maintains torque transmission with the pencil assembly 4. The pencil sharpening assembly 4 is driven by the driving assembly to continue rotating to sharpen the pencil, and the pencil feeding assembly 12 stops feeding the pencil, and at this time, the pencil enters a time delay pencil sharpening stage.

Finally, after the end of the time delay pencil sharpening stage, the motor shaft of the driving motor reversely rotates, and the pencil sharpening assembly 4 moves from the disconnection position to the connection position under the action of the first elastic piece 7 and the second elastic piece 9. The cutter rest 41 drives the driving fluted disc 3 to reversely rotate, and the pen feeding assembly 12 is driven by the driving fluted disc 3 to perform pen withdrawal, so that the pencil is driven to withdraw until the pencil body triggers the sliding block, and the sliding block triggers the pen feeding switch through the connecting rod. A control circuit on the automatic pencil sharpener receives the coupling signal from the pencil feeding switch and controls a driving motor in the driving assembly to stop working.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

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 (10)

1. An automatic pencil sharpener, comprising:

a pen feed assembly (12);

the driving fluted disc (3) is in meshed connection with the pen feeding assembly (12) and is used for driving the pen feeding assembly (12) to feed and withdraw a pen;

a pencil sharpening assembly (4) movable in a direction approaching or separating from the driving fluted disc (3) between a connection position in which the pencil sharpening assembly (4) maintains torque transmission with the driving fluted disc (3) and a disconnection position in which the pencil sharpening assembly (4) disconnects torque transmission with the driving fluted disc (3);

a first elastic member (7) located between the pencil sharpener assembly (4) and the middle case (5), and the first elastic member (7) has an elastic tendency to keep the pencil sharpener assembly (4) in a connected position.

2. An automatic pencil sharpener as in claim 1, wherein: a transmission shaft (6) inserted into the pencil sharpening assembly (4) and moving along with the pencil sharpening assembly (4), and the transmission shaft (6) keeps torque transmission with the pencil sharpening assembly (4) in the moving process.

3. An automatic pencil sharpener as in claim 1, wherein: and the transmission shaft (6) is spliced with the pencil sharpening assembly (4), and the pencil sharpening assembly (4) keeps torque transmission with the transmission shaft (6) in the process of moving between a connection position and a disconnection position.

4. An automatic pencil sharpener as in claim 2, wherein: the outer periphery of the transmission shaft (6) is outwards protruded to form a boss portion (61), a second elastic piece (9) is sleeved on the outer periphery of the transmission shaft (6), and the upper end of the second elastic piece (9) is abutted to the boss portion (61).

5. An automatic pencil sharpener as in claim 1, wherein: the pencil sharpener further comprises a support piece (8), wherein the upper part of the first elastic piece (7) is abutted with the lower part of the support piece (8), and the upper part of the support piece (8) is used for being abutted with the pencil sharpener assembly (4).

6. An automatic pencil sharpener as in claim 1, wherein: the upper end of the tool rest (41) in the pencil sharpening assembly (4) is provided with a second connecting part (42) which is matched with the first connecting part (32).

7. The automatic pencil sharpener of claim 6, wherein: the side of the driving fluted disc (3) close to the pen feeding assembly (12) is provided with a turbine part (31) which is used for being meshed and connected with the pen feeding assembly (12).

8. An automatic pencil sharpener as in claim 2, wherein: the pen feeding device comprises a shell (1) and an upper cover (2) which is connected with the shell (1) in a covering mode, wherein the driving fluted disc (3) and the pen feeding assembly (12) are installed in the upper cover (2).

9. The automatic pencil sharpener of claim 8, wherein: the shell (1) is provided with a scrap cavity (1 a), the middle shell (5) is positioned at the bottom of the scrap cavity (1 a), a supporting table (11) is fixedly installed in the shell (1), the supporting table (11) and the middle shell (5) are covered to form an installation space, and a gear seat (10) coaxially arranged with the transmission shaft (6) is arranged in the installation space.

10. The automatic pencil sharpener of claim 9, wherein: the drive shaft (6) maintains torque transmission with the gear seat (10) during movement.

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