Automatic pen feeding mechanism for a pencil sharpener

Abstract

The present invention discloses an automatic pencil-feeding mechanism for a pencil sharpener, comprising a gear seat and a gear cover that are fixed together, a transmission chamber formed between the gear seat and the gear cover, an upper pin shaft and a lower pin shaft are arranged in parallel on the front outer side wall of the gear seat, the upper transmission gear and the upper friction wheel are installed on the upper pin shaft, the lower transmission gear and the lower friction wheel are installed on the lower pin shaft, the upper transmission gear is located at the left end position of the upper pin shaft, and the lower transmission gear is located at the right end position of the lower pin shaft. An outer gear, an inner gear and a cam are sequentially sleeved from right front to rear in the transmission chamber,

Description

Technical Field

[0001] The invention relates to a pencil sharpener component, in particular to an automatic pen-feeding mechanism of a pencil sharpener. Background Art

[0002] Pencil sharpener is a tool for sharpening pencils quickly. Existing pencil sharpeners, particularly hand-cranked pencil sharpeners or electric automatic pencil sharpeners, need to manually push the pencil when sharpening the pencil to achieve the entry of the pencil, which is inconvenient to operate. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide an automatic pen feeding mechanism for a pencil sharpener in view of the deficiencies in the prior art.

[0004] In order to achieve the above object, the measures taken by the present invention are:

[0005] A pencil sharpener automatic feeding mechanism includes a tooth seat and a tooth cover fixed together, wherein a pencil insertion hole corresponding to the position is opened in the middle position of the tooth seat and the tooth cover, and a transmission chamber is formed between the tooth seat and the tooth cover. An upper pin shaft and a lower pin shaft are arranged in parallel on the front outer side wall of the tooth seat, an upper transmission tooth and an upper friction wheel are installed on the upper pin shaft, and a lower transmission tooth and a lower friction wheel are installed on the lower pin shaft. The upper transmission tooth is located at the left end position of the upper pin shaft, and the lower transmission tooth is located at the right end position of the lower pin shaft. A distance for a pencil to pass through is left between the upper friction wheel and the lower friction wheel, and the pencil contacts the upper friction wheel and the lower friction wheel when passing through. , the transmission chamber is sequentially sleeved with an outer gear, an inner gear and a cam from the right front to the rear, and a pencil insertion hole is opened at the center position of the outer gear, the inner gear and the cam, and a front side gear ring and an inner gear ring are provided on the outer gear, and the front side gear ring passes through the hole in the middle of the gear seat and is meshed with the upper transmission tooth and the lower transmission tooth, and the inner gear with a small tooth difference is meshed in the inner gear ring, and the cam part of the cam is sleeved in the inner gear, and the power input end of the cam is exposed from the center hole of the gear cover, and four limiting posts are evenly distributed on the inner side of the gear cover, and limiting holes corresponding to the limiting posts are provided on the outer side of the inner gear, and the aperture of the limiting holes is twice the diameter of the limiting posts;

[0006] The front outer side wall of the gear holder is integrally formed with two sets of shaft holes for installing the upper pin and the lower pin, and in each set of shaft holes, one shaft hole is set as an open shaft hole;

[0007] The two sides of the tooth cover are integrally formed with assembly fixing hooks for hooking onto the tooth seat, and the tooth seat is provided with hooking grooves for cooperating with the assembly fixing hooks;

[0008] A driving hole is provided at the end of the power input end;

[0009] The tooth seat and the tooth cover are provided with mounting holes corresponding to the positions;

[0010] The internal gear is designed as teeth, and the internal gear ring is designed as teeth.

[0011] The invention has the following beneficial effects: practicality, novel structure, and good transmission effect. When the pencil sharpener is sharpening a pencil, the pencil can be automatically fed in, which makes pencil sharpening more convenient, reduces the feeding speed, and reduces excessive friction of the pencil, thereby extending the service life of the feeding structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the exploded structure of one side of the present invention.

[0013] Figure 2 It is a schematic diagram of the exploded structure of the other side of the present invention.

[0014] Figure 3 This is a schematic diagram of the external structure of one side of the present invention.

[0015] Figure 4 This is a schematic diagram of the external structure of the other side of the present invention. DETAILED DESCRIPTION

[0016] A pencil sharpener automatic feeding mechanism includes a tooth seat 1 and a tooth cover 2 fixed together, wherein a pencil insertion hole corresponding to the position is opened in the middle position of the tooth seat 1 and the tooth cover 2, and a transmission chamber is formed between the tooth seat 1 and the tooth cover 2. An upper pin shaft 3 and a lower pin shaft 4 are arranged in parallel on the front outer side wall of the tooth seat 1, an upper transmission tooth 3-1 and an upper friction wheel 3-2 are installed on the upper pin shaft 3, and a lower transmission tooth 4-1 and a lower friction wheel 4-2 are installed on the lower pin shaft 4. The upper transmission tooth 3-1 is located at the left end position of the upper pin shaft 3, and the lower transmission tooth 4-1 is located at the right end position of the lower pin shaft 4. A distance for a pencil 5 to pass through is left between the upper friction wheel 3-2 and the lower friction wheel 4-2. When the pencil 5 passes through, it frictionally contacts the upper friction wheel 3-2 and the lower friction wheel 4-2, and the transmission The outer gear 6, the inner gear 7 and the cam 8 are sequentially sleeved from the right front to the rear in the chamber. The center positions of the outer gear 6, the inner gear 7 and the cam 8 are all provided with a pencil insertion hole. The outer gear 6 is provided with a front side gear ring 6-1 and an inner gear ring 6-2. The front side gear ring 6-1 passes through the hole in the middle of the gear seat 1 and is meshed with the upper transmission tooth 3-1 and the lower transmission tooth 4-1. The small tooth difference structure of the inner gear 7 is meshed in the inner gear ring 6-2. The cam part of the cam 8 is sleeved in the inner gear 7. The power input end 8-1 of the cam 8 is exposed from the center hole of the gear cover 2. Four limiting columns 2-9 are evenly distributed on the inner side of the gear cover 2. The outer side of the inner gear 7 is provided with a limiting hole 7-9 corresponding to the limiting column 2-9. The aperture of the limiting hole 7-9 is twice the diameter of the limiting column 2-9.

[0017] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, the automatic pen feeding mechanism of this mechanism is installed in a hand-crank pencil sharpener or an electric automatic pencil sharpener. The power input end 8-1 of the cam 8 is connected to the power output end of the hand-crank pencil sharpener or the power output end of the electric automatic pencil sharpener. The cam 8 is driven to rotate, and the cam portion of the cam 8 drives the internal gear 7 to realize a small tooth difference planetary gear transmission in the inner gear ring 6-2 of the outer gear 6, driving the outer gear 6 to rotate. When the outer gear 6 rotates, the front side gear ring 6-1 on the outer gear 6 drives the upper transmission teeth 3-1 and the lower transmission teeth 4-1 to rotate. Specifically, Figure 1 The figure is for reference only and illustrates the rotation and transmission direction of the embodiment. When the outer gear 6 rotates counterclockwise, the front side ring gear 6-1 of the outer gear 6 drives the upper transmission gear 3-1 to rotate downward and drives the lower transmission gear 4-1 to rotate upward. The upper transmission gear 3-1 drives the upper friction wheel 3-2 to rotate downward, and the lower transmission gear 4-1 drives the lower friction wheel 4-2 to rotate upward. The pencil 5 clamped between the upper friction wheel 3-2 and the lower friction wheel 4-2 can be pushed toward one end of the tooth cover 2 by the upper friction wheel 3-2 and the lower friction wheel 4-2, thereby realizing automatic pencil feeding when sharpening the pencil.

[0018] The front outer wall of the gear holder 1 is integrally formed with two sets of axial holes for mounting the upper and lower pins 3 and 4. In each set of axial holes, one of the holes is designed as an open hole. This structure facilitates the installation of the upper and lower pins 3 and 4. During installation, one end of the upper pin 3 is inserted into the axial hole, and the other end is snapped into the open hole.

[0019] The two sides of the tooth cover 2 are integrally formed with assembly fixing hooks 2-1 for hooking onto the tooth seat 1, and the tooth seat 1 is provided with hooking grooves 1-1 for cooperating with the assembly fixing hooks 2-1, so as to facilitate quick assembly between the tooth cover 2 and the tooth seat 1.

[0020] The end of the power input end 8-1 is provided with a driving hole, which is usually a square hole, to facilitate transmission connection with the power output mechanism.

[0021] The tooth seat 1 and the tooth cover 2 are provided with corresponding mounting holes, which facilitate the installation of the mechanism into the pencil sharpener.

[0022] The internal gear 7 is designed with 19 teeth, and the inner ring gear 6-2 is designed with 20 teeth. This conveniently and quickly implements a planetary gear transmission structure with a small tooth difference. This structure reduces speed, lowers pencil feed speed, and reduces excessive pencil friction, thereby extending the life of the pencil feed mechanism.

Claims

1. An automatic pen feeding mechanism for a pencil sharpener, comprising a tooth seat (1) and a tooth cover (2) fixed together, characterized in that: A pencil insertion hole corresponding to the position is provided in the middle of the tooth seat (1) and the tooth cover (2), and a transmission chamber is formed between the tooth seat (1) and the tooth cover (2). An upper pin shaft (3) and a lower pin shaft (4) are arranged in parallel on the front outer side wall of the tooth seat (1). An upper transmission tooth (3-1) and an upper friction wheel (3-2) are installed on the upper pin shaft (3), and a lower transmission tooth (4-1) and a lower friction wheel (4-2) are installed on the lower pin shaft (4). The upper transmission tooth (3-1) Located at the left end of the upper pin shaft (3), the lower transmission tooth (4-1) is located at the right end of the lower pin shaft (4), and a distance for a pencil (5) to pass through is left between the upper friction wheel (3-2) and the lower friction wheel (4-2). When the pencil (5) passes through, it is in friction contact with the upper friction wheel (3-2) and the lower friction wheel (4-2). The transmission chamber is provided with an outer gear (6), an inner gear (7) and a cam (8) in sequence from the right front to the rear. The outer gear (6), the inner gear (7) and The center position of the cam (8) is provided with a pencil insertion hole, and the outer gear (6) is provided with a front side gear ring (6-1) and an inner gear ring (6-2). The front side gear ring (6-1) passes through the hole in the middle of the gear seat (1) and is engaged with the upper transmission tooth (3-1) and the lower transmission tooth (4-1). The inner gear (7) with a small tooth difference is engaged with the inner gear ring (6-2). The cam portion of the cam (8) is set in the inner gear (7). The power input end (8) of the cam (8) is connected to the upper transmission tooth (3-1) and the lower transmission tooth (4-1). -1) is exposed from the center hole of the gear cover (2), four limiting posts (2-9) are evenly distributed on the inner side of the gear cover (2), and limiting holes (7-9) corresponding to the limiting posts (2-9) are provided on the outer side of the internal gear (7), and the aperture of the limiting hole (7-9) is twice the diameter of the limiting post (2-9); the gear seat (1) and the gear cover (2) are provided with mounting holes corresponding to the positions; the internal gear (7) is designed to have 19 teeth, and the inner gear ring (6-2) is designed to have 20 teeth.

2. The automatic pen-feeding mechanism for a pencil sharpener according to claim 1, characterized in that: Two sets of shaft holes for installing the upper pin shaft (3) and the lower pin shaft (4) are integrally formed on the front outer side wall of the gear seat (1), and one shaft hole in each set of shaft holes is set as an open shaft hole.

3. The automatic pen-feeding mechanism for a pencil sharpener according to claim 1 or 2, characterized in that: Both sides of the tooth cover (2) are integrally formed with assembly fixing hooks (2-1) for hooking onto the tooth seat (1), and the tooth seat (1) is provided with hooking grooves (1-1) for cooperating with the assembly fixing hooks (2-1).

4. The automatic pen-feeding mechanism for a pencil sharpener according to claim 3, characterized in that: A driving hole is provided at the end of the power input end (8-1).

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