Pen feeding mechanism and electric pencil sharpener having the same

Abstract

The invention discloses a pen feeding mechanism and an electric pencil sharpener having the pen feeding mechanism. The electric pencil sharpener comprises the pen feeding mechanism, the pen feeding mechanism comprises a base, the base is provided with a pen clamping assembly, the pen clamping assembly comprises two rollers movably connected to the base, the two rollers are arranged in parallel and spaced apart, the two rollers are sleeved with gears, the base is provided with a spiral toothed disk, the two gears are meshed with the toothed disk, at least one of the two rollers can shake in the inner hole of the gear sleeved thereon, at least one of the two ends of the roller can deviate from the other roller in the horizontal direction to expand the gap between the two rollers, and at least one clamping structure for preventing the gear from shifting is provided on the base. The electric pencil sharpener changes the matching clearance between the roller and the gear in the pen feeding mechanism so that when the roller is offset, the gear can still be precisely meshed with the toothed disk to ensure the normal operation of the pencil sharpener.

Description

Technical Field

[0001] The invention relates to the technical field of stationery products, in particular to a pen feeding mechanism and an electric pencil sharpener having the pen feeding mechanism. Background Art

[0002] The utility model patent with application number CN201921397996.9 discloses an automatic pen feeding mechanism, which includes a bracket and a pen feeding assembly, the bracket includes a base, the base includes a bottom surface, the pen feeding assembly is elastically connected to the bottom surface through a spring mechanism, a turbine is connected to the base, the pen feeding assembly includes a first pen feeding assembly and a second pen feeding assembly, the first pen feeding assembly includes a clutch, a first impeller engaged on the turbine, and a first impeller shaft connected to the first impeller through a clutch, the second pen feeding assembly includes a second impeller engaged on the turbine and a second impeller shaft fixedly connected to the second impeller.

[0003] In the above-mentioned pen feeding mechanism, the pen feeding assembly has a closing force toward the middle under the action of the elastic connection. When the pencil enters the pen feeding assembly, the first impeller shaft and the second impeller shaft are respectively acted upon by the first spring and the second spring, so that the mechanism has the ability to change the pen feeding gap according to the size of the pencil, and the pen feeding assembly has a closing force on the inserted pencil to fix the pencil. However, the mechanism still has certain defects. After the pencil is inserted into the gap, the first impeller shaft and the second impeller shaft will shake sideways, making the first impeller and the second impeller easy to shift in the turbine, and the first impeller and the second impeller cannot be accurately meshed with the turbine, affecting the normal operation of the pencil sharpener. Summary of the invention

[0004] The object of the present invention is to provide a pen feeding mechanism, which can change the matching clearance between the roller and the gear so that the gear can still accurately mesh with the toothed disc when the roller is offset.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is: a pen feeding mechanism, including a base, the base is provided with a pen clamping assembly, the pen clamping assembly includes two rollers movably connected to the base, the two rollers are arranged side by side and in parallel with each other, the two rollers are both sleeved with gears, the base is provided with a spiral toothed disk, the two gears are meshed with the toothed disk, at least one of the two rollers can swing in the inner hole of the gear it is sleeved with, at least one of the two ends of the roller can deviate from the other roller in the horizontal direction to expand the gap between the two rollers, and the base is provided with at least one clamping structure for preventing the gear from being displaced.

[0006] As a preferred embodiment, the inner hole is trumpet-shaped, the diameter of the inner hole gradually decreases from one side to the other side, and the minimum diameter of the inner hole matches one end of the roller sleeved thereon. The trumpet-shaped inner hole matches the roller more reasonably, which can not only make the roller shake in the inner hole of the gear, but also ensure that the amplitude of the roller shaking is not too large.

[0007] As a preferred embodiment, the clamping structure includes two clamping rods erected on the base, the two clamping rods are respectively located on both sides of the gear, and the gear is clamped between the two clamping rods. The clamping rod is fixed on the base, and the gear is clamped by the clamping rod to prevent the gear from displacement.

[0008] As a preferred embodiment, the two rollers are sleeved with rubber wheels, the two rubber wheels are arranged side by side and a gap for inserting a pencil is formed between the two rollers, at least one of the two rollers moves in a horizontal direction and drives the sleeved rubber wheel away from the other rubber wheel. A pencil can be inserted into the gap between the two rubber wheels.

[0009] As a preferred embodiment, the base is provided with at least one retaining rib for applying a force in the closing direction of the two rubber wheels, and the retaining rib applies a force to the pencil clamping assembly to fix the pencil.

[0010] As a preference, the retaining rib is elastic, and one end of the retaining rib is fixedly connected to the base, and the other end of the retaining rib abuts against a side portion of the deviated end of the roller.

[0011] As a preferred embodiment, the base is provided with a plurality of holes connected to the two rollers, and at least one of the plurality of holes is a waist-shaped hole. The holes connected to the rollers are designed as waist-shaped holes so that the ends of the rollers can translate horizontally in the waist-shaped holes, and the waist-shaped holes play a guiding role.

[0012] As a preferred embodiment, the retaining rib is erected on the base, and the retaining rib is integrally formed with the base. The retaining rib and the base are integrally formed, which not only increases the firmness of the connection between the retaining rib and the base, but also enables the base to be manufactured by mold injection. In the process of designing the mold, the retaining rib is designed into the mold. In the subsequent assembly of the base, there is no need to add or process additional accessories, thereby reducing accessories and processing procedures and reducing production costs.

[0013] As a preferred embodiment, the invention further comprises an upper cover connected to the base, wherein the upper cover is provided with a pen-feeding hole corresponding to the position of the aperture, and a telescopic member for clamping a pen is provided at the pen-feeding hole. The aperture of the pen-feeding hole is larger than the maximum width of the aperture, so that pencils of different diameters can be inserted into the aperture from the pen-feeding hole. The telescopic member provided in the pen-feeding hole can adjust the opening size of the pen-feeding hole. When the pencil is inserted into the pen-feeding hole, the telescopic member abuts against the pencil, and the telescopic member and the hole wall of the pen-feeding hole jointly act on (squeeze) the pencil to fix (clamp) the pencil.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the gear and the roller are movably matched, and the roller can swing in the gear. When the roller is offset within a certain range, the gear will not be displaced, and the meshing state of the gear and the toothed disc will not be affected, thereby ensuring the smooth operation of the pencil sharpener. In addition, a clamping structure is provided on the base, and the gear is clamped and fixed by the clamping structure to further prevent the gear from being displaced.

[0015] Another object of the present invention is to provide an electric pencil sharpener to solve the problem of abnormal operation of the pencil sharpener due to its inability to adapt to the insertion of pencils with different diameters.

[0016] In order to solve the above technical problem, another technical solution provided by the present invention is: an electric pencil sharpener, comprising a housing, wherein the pen feeding mechanism of the above structure is arranged inside the housing.

[0017] The advantages of the present invention over the prior art are that the roller of the pen feeding mechanism of the present invention is movably matched with the gear, the roller can swing in the gear, even if the position of the roller is offset within a certain range, the gear will not be offset together, and the gear is limited by the clamping structure, so that the meshing state of the gear and the toothed disc will not be affected, so that the pencil sharpener can adapt to the insertion of pencils with different diameters within a certain diameter range, ensuring the normal operation of the pencil sharpener. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 It is a partial structural schematic diagram of the present invention;

[0020] Figure 3 This is a schematic diagram of the base structure of the present invention;

[0021] Figure 4 It is a schematic diagram of the exploded view of the base and the pen holder assembly of the present invention;

[0022] Figure 5 It is a schematic diagram of the axial section of the gear and roller matching of the present invention;

[0023] Figure 6 This is a schematic diagram of the axial section of the gear.

[0024] In the figure: 1, base; 2, upper cover; 201, pen feeding hole; 202, telescopic member; 3, roller; 4, rubber wheel; 5, retaining rib; 6, toothed disc; 7, hole; 8, gear; 10, clamping rod; 11, inner hole. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0026] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0028] The terms "including" and "having" and any variations thereof in the description and claims of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0029] like Figure 1-6 As shown, a pen feeding mechanism includes an upper cover 2 and a base 1, wherein the upper cover 2 is connected to the base 1, and the upper cover 2 is provided with a pen feeding hole 201, and a telescopic member 202 for fixing a pencil is provided at the pen feeding hole 201, and the telescopic member 202 is connected to the upper cover 2, and the opening of the pen feeding hole 201 can be adjusted by pressing the telescopic member 202 to adapt pencils of different diameters to be inserted into the pen feeding hole 201.

[0030] The base 1 is provided with a pen clamping assembly, which includes two rollers 3 movably connected to the base 1, the two rollers 3 are arranged side by side and spaced apart, and each roller 3 is sleeved with a gear 8 and a rubber wheel 4, each roller 3 can swing in the inner hole 11 of the gear 8 sleeved therewith, the inner holes 11 of all gears 8 are trumpet-shaped, and the aperture of the inner hole 11 gradually decreases from one side to the other side, and the minimum aperture of the inner hole 11 matches with one side end of the roller 3 sleeved therewith, the base 1 is provided with a spiral toothed disk 6, all gears 8 are meshed with the toothed disk 6, the gap between the two rollers 3 can be reduced / expanded as the two rollers 3 are closed / separated, and a clamping structure for preventing the gear 8 from shifting is also connected to the base 1.

[0031] The clamping structure includes two clamping rods 10 erected on the base 1 . Both clamping rods 10 are elastic. The two clamping rods 10 are respectively located on both sides of the gear 8 and one clamping rod 10 faces the other clamping rod 10 . The gear 8 is clamped between the two clamping rods 10 .

[0032] The two rubber wheels 4 are arranged side by side and a gap for inserting a pencil is formed between the two. The two rollers 3 move in the horizontal direction and drive the rubber wheel 4 connected thereto to move away from / close to the other rubber wheel 4. A pencil can be inserted into the gap, and the gap can shrink / expand as the two rubber wheels 4 close / separate.

[0033] The base 1 is connected with two retaining ribs 5 for applying force to the closing direction of the two rubber wheels 4. The retaining ribs 5 are elastic and abut against the side of the roller 3. The retaining ribs 5 are integrally formed with the base 1, and the retaining ribs 5 are elastic and can be bent to a certain extent.

[0034] The base 1 is provided with a plurality of holes 7 connected to the two rollers 3 .

[0035] The two rollers 3 are rollers 3a and rollers 3b, the two rubber wheels 4 are rubber wheels 4a and rubber wheels 4b, the two gears 8 are gears 8a and gears 8b, the gears 8a and rubber wheels 4a are sleeved on the front end of the roller 3a in sequence, and the rubber wheels 4a and rubber wheels 4b are sleeved on the rear end of the roller 3b in sequence, wherein the rubber wheels 4a and rubber wheels 4b are arranged side by side, and the rollers 3a and 3b can be shaken in the gears 8a and 8b, respectively. The base 1 is provided with a plurality of openings 7, respectively, openings 7a, openings 7b, openings 7c and openings 7d, wherein the openings 7a and openings 7c are waist-shaped holes, and the openings 7a and openings 7c are waist-shaped holes. 7b and the opening 7d are U-shaped holes; the two ends of the roller 3a are respectively inserted into the opening 7a and the opening 7b, and the two ends of the roller 3b are respectively inserted into the opening 7c and the opening 7d, wherein the end of the roller 3a connected to the opening 7a and the end of the roller 3b connected to the opening 7c can both move in the horizontal direction; the multiple retaining ribs 5 arranged on the base 1 are respectively the retaining ribs 5a and the retaining ribs 5b, the retaining rib 5a is arranged close to the opening 7a and abuts against the left side of the roller 3a, and the retaining rib 5b is arranged close to the opening 7c and abuts against the right side of the roller 3b; in addition, the base 1 is provided with a plurality of clamping rods 10 for clamping the gears 8a and the gears 8b.

[0036] The invention also discloses an electric pencil sharpener, comprising a shell, in which the pen feeding mechanism of the structure mentioned above is arranged.

[0037] The above describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention to be protected. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A pen feeding mechanism, comprising a base (1), the base (1) being provided with a pen clamping assembly, the pen clamping assembly comprising two rollers (3) movably connected to the base (1), the two rollers (3) being arranged side by side in parallel and spaced apart, the two rollers (3) being sleeved with gears (8), the base (1) being provided with a spiral toothed disc (6), the two gears (8) being meshed with the toothed disc (6), characterized in that: At least one of the two rollers (3) can rock in the inner hole (11) of the gear (8) on which it is sleeved, and at least one of the two ends of the roller (3) can deviate from the other roller (3) in the horizontal direction to expand the gap between the two rollers (3). The base (1) is provided with at least one clamping structure for preventing the gear (8) from being displaced.

2. A pen feeding mechanism as claimed in claim 1, characterized in that: The inner hole (11) is trumpet-shaped, and the diameter of the inner hole (11) gradually decreases from one side to the other side, and the minimum diameter of the inner hole (11) matches one end of the roller (3) to which it is sleeved.

3. A pen feeding mechanism as claimed in claim 2, characterized in that: The clamping structure comprises two clamping rods (10) erected on a base (1), the two clamping rods (10) being respectively located on two sides of the gear (8), and the gear (8) being clamped between the two clamping rods (10).

4. A pen feeding mechanism as claimed in claim 1, characterized in that: The two rollers (3) are both sleeved with a rubber wheel (4), the two rubber wheels (4) are arranged side by side and a gap for inserting a pencil is formed between the two rollers (3), and at least one of the two rollers (3) moves in a horizontal direction and drives the sleeved rubber wheel (4) away from the other rubber wheel (4).

5. A pen feeding mechanism as claimed in claim 4, characterized in that: The base (1) is provided with at least one retaining rib (5) for applying a force in the closing direction of the two rubber wheels (4).

6. A pen feeding mechanism as claimed in claim 5, characterized in that: The retaining rib (5) is elastic, and one end of the retaining rib (5) is fixed to the base (1), while the other end of the retaining rib (5) abuts against the side of the end of the roller (3) where the roller (3) deviates.

7. A pen feeding mechanism as claimed in claim 6, characterized in that: The base (1) is provided with a plurality of holes (7) connected to the two rollers (3), and at least one hole (7) among the plurality of holes (7) is a waist-shaped hole.

8. A pen feeding mechanism as claimed in claim 5, characterized in that: The retaining rib (5) stands upright on the base (1), and the retaining rib (5) and the base (1) are integrally formed.

9. A pen feeding mechanism as claimed in claim 4, characterized in that: It also comprises an upper cover (2) connected to the base (1), wherein the upper cover (2) is provided with a pen inlet hole (201) corresponding to the position of the pore, and a telescopic member (202) for clamping a pen is provided at the pen inlet hole (201).

10. An electric pencil sharpener, comprising a housing, characterized in that: The housing is provided with a pen feeding mechanism as described in any one of claims 1 to 9.

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