Automatic broken core removal mechanism of pencil sharpener

Abstract

The invention discloses an automatic broken core removal mechanism for a pencil sharpener, comprising a tool holder (1), wherein the tool holder (1) is provided with a channel (2) for inserting a pen, and is characterized in that: the tool holder (1) is further provided with a pen tip limiting block (3), wherein the pen tip limiting block (3) comprises a spring piece (3.1), wherein the spring piece (3.1) is located at the outlet of the channel (2), and when the pen tip (4) is in a normal state, a portion of the outer wall of the sharpened pen tip (4) is in close contact with the spring piece (3.1) and squeezes the spring piece (3.1) to deform; when the pen tip (4) is in a broken state, the spring piece (3.1) is reset and squeezes the broken pen tip (4). The automatic broken core removal mechanism for a pencil sharpener directly removes broken cores and does not affect the broken core rate.

Description

Technical Field

[0001] The invention relates to the technical field of stationery, in particular to an automatic broken pencil removal mechanism for a pencil sharpener. Background Art

[0002] Currently, there is a disclosed pencil sharpener that does not break pencil leads. The sharpener comprises a sharpener frame and a sharpener blade. The sharpener frame is provided with a guide tube having a tapered guide groove. The sharpener blade is located above the guide tube. The upper surface of the guide tube has a sharpening groove. The guide tube includes a sleeve portion at the front end of the guide tube and a support portion at the rear end of the guide tube. The distance from the upper surface of the side wall of the support portion on at least one side of the guide groove to the sharpener blade is greater than the diameter of the pencil lead, forming a gap through which the broken pencil lead can be dropped out laterally. The above structure adds a gap to allow the broken pencil lead to be adjusted out through the gap. However, there is still a problem. The broken pencil lead needs to be aligned with the gap in order to be dropped. The position relationship must be correct, that is, the pencil lead is on top and the gap is on the bottom. The pencil lead falls by its own weight, which is still inconvenient in actual use.

[0003] Also disclosed is a pencil sharpener tool holder, comprising a tool holder body, the tool holder body being provided with a fixing frame and a stopper, the fixing frame being provided with a passage for pencils to pass through, the passage being open at the upper end near the stopper, the passage being provided with at least one notch, the notch being located on one side of the passage near the stopper, the notch being located on the right side of the tool holder when the tool holder rotates counterclockwise, and being located on the left side of the tool holder when the tool holder rotates clockwise. The utility model provides a pencil sharpener tool holder that is convenient for removing broken pencil leads without the need for other auxiliary tools. By adding the notch and the chip box, broken pencil leads fall from the notch into the chip box. This structure also relies on gravity and the rotation of the tool holder itself to fall into the chip box, so that when in use, the lead will only fall in the correct position; otherwise, it will remain blocked in the channel, affecting normal pencil sharpening. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an automatic broken core removal mechanism for a pencil sharpener which can directly remove broken cores without affecting the broken core rate.

[0005] The technical solution of the present invention is to provide an automatic broken core removal mechanism for a pencil sharpener with the following structure, including a tool holder, wherein the tool holder is provided with a channel for inserting a pen, and is characterized in that: the tool holder is also provided with a pen tip limiting block, the pen tip limiting block includes a spring piece, and the spring piece is located at the outlet of the channel. When the pen tip is in a normal state, a part of the outer wall of the sharpened pen tip is in close contact with the spring piece and squeezes the spring piece to deform; when the pen tip is in a broken state, the spring piece is reset and squeezes the broken pen tip.

[0006] The side wall of the spring is provided with a curved surface, and the curved surface fits the sharpened pen tip.

[0007] A protrusion is provided at the end of the elastic piece, the curved surface is provided on the side wall of the protrusion, and the inner end surface of the protrusion is a step surface and a distance is provided between the inner end surface of the protrusion and the end surface of the channel.

[0008] The pen tip limiting block also includes a fixed plate. The fixed end of the spring extends in a direction close to the channel and is connected to one end of the fixed plate with a certain angle between them. The free end of the spring fits the pen tip.

[0009] One end of the fixing plate is bent toward the free end of the elastic sheet, and a distance is provided between the end and the free end of the elastic sheet.

[0010] The fixing plate is provided with two fixing feet, and the two fixing feet are both fixed on the tool holder.

[0011] The pen tip limiting block also includes a fixing plate, the fixing end of the spring extends in a direction away from the channel and is connected to one end of the fixing plate, the middle portion of the fixing plate is bent, and the free end of the spring fits the pen tip.

[0012] The pen tip limiting block further includes a connecting shaft, a first connecting plate, a second connecting plate and a third connecting plate;

[0013] The fixed end of the spring sheet extends in a direction away from the channel and is connected to one end of the first connecting plate, the connecting shaft is located at the end of the spring sheet close to the channel, the connecting shaft is rotatably connected to the tool holder, the other end of the first connecting plate is connected to one end of the second connecting plate, the other end of the second connecting plate is connected to one end of the third connecting plate, and the other end of the third connecting plate is against the outer side of the side wall where the channel is located. The connections between the spring sheet, the first connecting plate, the second connecting plate and the third connecting plate are all bent in a direction close to the channel, and the spring sheet swings with the connecting shaft as the center of the circle.

[0014] After adopting the above structure, the technology of the present invention has the following advantages compared with the existing technology: the pen tip limit block plays the role of a pencil backer and plays the role of ejecting the pencil, when sharpening the pencil, the pen tip hits the pen tip limit block and squeezes the pen tip limit block backwards, and after it reaches the bottom, the pen tip limit block has the function of a pencil tip backer, which can reduce pencil breakage; when the pencil tip breaks, the broken pencil loses the supporting force of the lead behind it and will be directly ejected by the pen tip limit block or pushed away from the pen tip stopper. When the lead is pushed away from the pen tip stopper, the broken pencil can be ejected from the tool holder by the pencil to be cut next time, so that the broken pencil can be directly eliminated without affecting the lead breakage rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Attachment Figure 1 The figure is an exploded schematic diagram of the automatic broken core removal mechanism of the pencil sharpener of the present invention.

[0016] Attachment Figure 2 The figure is a schematic diagram of the normal state of the pencil refill of the automatic broken refill removal mechanism of the pencil sharpener of the present invention.

[0017] Attachment Figure 3 The figure is a schematic diagram of the broken lead state of the automatic lead removal mechanism of the pencil sharpener of the present invention.

[0018] Attachment Figure 4 The figure is a schematic diagram of the pen tip limiting block of the automatic broken core removal mechanism of the pencil sharpener of the present invention.

[0019] Attachment Figure 5 Schematic diagram of the normal state of the pencil refill of the automatic broken refill removal mechanism of a pencil sharpener according to another embodiment of the present invention.

[0020] Attachment Figure 6 Schematic diagram of a broken lead state of an automatic lead-removing mechanism of a pencil sharpener according to another embodiment of the present invention.

[0021] Attachment Figure 7 The figure is a schematic diagram of a pen tip limiting block of an automatic broken core removal mechanism of a pencil sharpener according to another embodiment of the present invention.

[0022] Shown in the figure: 1. Tool holder, 2. Channel, 3. Pen tip limit block, 3.1. Spring piece, 3.1.1. Curved surface, 3.2. Fixed plate, 3.2.1. Fixed foot, 3.3. Connecting shaft, 3.4. First connecting plate, 3.5. Second connecting plate, 3.6. Third connecting plate, 4. Pen tip. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] like Figure 1-7 As shown, the automatic broken core removal mechanism of a pencil sharpener of the present invention includes a tool holder 1 having a conical channel 2 for inserting a pen and a pen tip stopper 3 including a spring 3.1 located at the outlet of the channel 2. When squeezed, the spring 3.1 can swing freely or swing around a center of a circle.

[0025] In the normal state of the pen tip 4, a portion of the outer wall of the sharpened pen tip 4 is in close contact with the spring piece 3.1 and squeezes the spring piece 3.1 to deform; when sharpening the pen, the pen tip hits the pen tip stop block and pushes the pen tip stop block backward. After the pen tip stops, the pen tip stop block has the function of supporting the pen tip, which can reduce the risk of the pen tip breaking.

[0026] When the nib 4 is broken, the spring 3.1 returns to its original position and compresses the broken nib 4. When the nib breaks, the broken lead loses the support force of the lead behind it and is directly ejected by the nib stopper or deviates from the nib stopper. When the lead deviates from the nib stopper, the broken lead can be ejected from the tool holder by the next pencil being cut, thereby directly removing the broken lead without affecting the lead breakage rate.

[0027] The sidewall of the spring piece 3.1 is provided with a curved surface 3.1.1, which mates with the sharpened pen tip 4 and is a portion of a conical surface. The end of the spring piece 3.1 is provided with a protrusion, and the curved surface 3.1.1 is located on the sidewall of the protrusion, so that the curved surface 3.1.1 is aligned with the channel, thereby compressing the spring piece 3.1 when the pen refill is inserted. The inner end surface of the protrusion is a stepped surface, and there is a gap between it and the end surface of the channel 2, so that the spring piece 3.1 has room to swing.

[0028] The pen tip stopper 3 also includes a fixed plate 3.2. The fixed end of the spring clip 3.1 extends in a direction close to the channel 2 and is connected to one end of the fixed plate 3.2 at a certain angle. The angle is acute, allowing it to be installed inside the tool holder 1. The free end of the spring clip 3.1 is in contact with the pen tip 4. One end of the fixed plate 3.2 is bent toward the free end of the spring clip 3.1, and a gap is provided between the end and the free end of the spring clip 3.1. The fixed plate 3.2 is provided with two fixed feet 3.2.1, both of which are fixed to the tool holder 1.

[0029] Example 1 of the pen tip limit block: Figure 1-4 As shown, the pen tip limit block 3 also includes a fixed plate 3.2, the fixed end of the spring piece 3.1 extends in a direction away from the channel 2 and is connected to one end of the fixed plate 3.2, the middle part of the fixed plate 3.2 is bent, and the free end of the spring piece 3.1 fits with the pen tip 4.

[0030] Since the spring piece 3.1 and the fixing plate 3.2 have an angle, the spring piece 3.1 is closer to the channel 2 when no external force is applied to the spring piece 3.1. After the pen refill is inserted, the pen refill fits against the curved surface 3.1.1 of the spring piece 3.1, so that the pen refill has the function of a backrest and limit. At this time, the angle between the spring piece 3.1 and the fixing plate 3.2 changes, so that the spring piece 3.1 has a certain elasticity. When the pen tip breaks, the broken tip loses the supporting force of the lead behind it and will be directly pushed out by the pen tip limit block or pushed away from the pen tip stop block.

[0031] Example 2 of the pen tip limit block: Figure 5-7As shown, the pen tip limit block 3 also includes a connecting shaft 3.3, a first connecting plate 3.4, a second connecting plate 3.5 and a third connecting plate 3.6; the fixed end of the spring piece 3.1 extends in a direction away from the channel 2 and is connected to one end of the first connecting plate 3.4, and the connection between the two is bent approximately 90 degrees. The connecting shaft 3.3 is located at the end of the spring piece 3.1 close to the channel 2, and the connecting shaft 3.3 is rotatably connected to the tool holder 1, and the other end of the first connecting plate 3.4 is connected to one end of the second connecting plate 3.5, and the connection between the two is bent approximately 90 degrees; the other end of the second connecting plate 3.5 is connected to one end of the third connecting plate 3.6, and the connection between the two is bent approximately 90 degrees; the other end of the third connecting plate 3.6 abuts against the outer side of the side wall where the channel 2 is located, and the connections between the spring piece 3.1, the first connecting plate 3.4, the second connecting plate 3.5 and the third connecting plate 3.6 are all bent in a direction close to the channel 2, and the spring piece 3.1 swings with the connecting shaft 3.3 as the center of the circle.

[0032] The second connecting plate 3.5 is longer than the spring clip 3.1 and is connected to the spring clip 3.1 at one end through the first connecting plate 3.4 and the third connecting plate 3.6, while the other end abuts the outside of the side wall of the channel 2. Because the third connecting plate 3.6 abuts the outside of the side wall of the channel 2, the first connecting plate 3.4 and the second connecting plate 3.5 provide an elastic force to the spring clip 3.1. When the spring clip 3.1 is not subjected to external forces, it is pulled closer to the channel 2. After the pen refill is inserted, the pen refill is aligned with the curved surface 3.1.1 of the spring clip 3.1, providing a support and position-limiting function. At this time, the angle between the spring clip 3.1 and the fixed plate 3.2 changes, giving the spring clip 3.1 a certain degree of elasticity. When the pen tip breaks, the broken refill loses the support force of the lead behind it and is directly ejected from the pen tip limit block or pushed away from the pen tip stop block.

Claims

1. An automatic broken core removal mechanism for a pencil sharpener, comprising a tool holder (1), wherein the tool holder (1) is provided with a channel (2) for inserting a pen, and wherein: The tool holder (1) is further provided with a pen tip limiting block (3), the pen tip limiting block (3) comprising a spring piece (3.1), the spring piece (3.1) being located at the outlet of the channel (2), and the pen tip (4) being in a normal state, a portion of the outer wall of the sharpened pen tip (4) being in close contact with the spring piece (3.1) and squeezing the spring piece (3.1) to deform; and the pen tip (4) being in a broken state, the spring piece (3.1) being reset and squeezing the broken pen tip (4); The side wall of the spring piece (3.1) is provided with a curved surface (3.1.1), and the curved surface (3.1.1) fits with the sharpened pen tip (4); the end of the spring piece (3.1) is provided with a protrusion, and the curved surface (3.1.1) is arranged on the side wall of the protrusion.

2. The automatic broken core removal mechanism for a pencil sharpener according to claim 1, characterized in that: The inner end surface of the protrusion is a step surface and a distance is provided between the inner end surface of the protrusion and the end surface of the channel (2).

3. The automatic broken core removal mechanism for a pencil sharpener according to any one of claims 1 or 2, characterized in that: The pen tip limiting block (3) further comprises a fixed plate (3.2); the fixed end of the spring piece (3.1) extends in a direction close to the channel (2) and is connected to one end of the fixed plate (3.2) with the two forming a certain angle; the free end of the spring piece (3.1) is in contact with the pen tip (4).

4. The automatic broken core removal mechanism for a pencil sharpener according to claim 3, characterized in that: One end of the fixing plate (3.2) is bent toward the free end of the elastic sheet (3.1), and a distance is provided between the end and the free end of the elastic sheet (3.1).

5. The automatic broken core removal mechanism for a pencil sharpener according to claim 4, characterized in that: The fixed plate (3.2) is provided with two fixed feet (3.2.1), and the two fixed feet (3.2.1) are both fixed on the tool holder (1).

6. The automatic broken core removal mechanism for a pencil sharpener according to any one of claims 1 or 2, characterized in that: The pen tip limiting block (3) further comprises a connecting shaft (3.3), a first connecting plate (3.4), a second connecting plate (3.5) and a third connecting plate (3.6); the fixed end of the spring piece (3.1) extends in a direction away from the channel (2) and is connected to one end of the first connecting plate (3.4); the connecting shaft (3.3) is located at the end of the spring piece (3.1) close to the channel (2); the connecting shaft (3.3) is rotatably connected to the tool holder (1); the other end of the first connecting plate (3.4) is connected to the tool holder (1). One end of the second connecting plate (3.5) is connected, the other end of the second connecting plate (3.5) is connected to one end of the third connecting plate (3.6), the other end of the third connecting plate (3.6) abuts against the outer side of the side wall where the channel (2) is located, the connections between the spring plate (3.1), the first connecting plate (3.4), the second connecting plate (3.5) and the third connecting plate (3.6) are all bent in a direction close to the channel (2), and the spring plate (3.1) swings with the connecting shaft (3.3) as the center of the circle.

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