Pencil feeding mechanism and electric pencil sharpener

Abstract

The utility model relates to the technical field of pencil sharpeners, in particular to a pencil feeding mechanism and an electric pencil sharpener, the pencil feeding mechanism comprises a support, a first pencil clamping assembly and a second pencil clamping assembly, the first pencil clamping assembly and the second pencil clamping assembly are arranged on the support, and the first pencil clamping assembly comprises a first main shaft; the first pen clamping assembly comprises a first main shaft, a first transmission wheel, a first clamping wheel, a first limiting sleeve and a first elastic piece are sequentially arranged on the first main shaft, a first fixing plate and a second fixing plate are arranged on the support, and the two ends of the first elastic piece abut against the first limiting sleeve and the first fixing plate respectively. A second transmission wheel, a second clamping wheel, a second limiting sleeve and a second elastic piece are sequentially arranged on the second main shaft, and the two ends of the second elastic piece abut against the second limiting sleeve and the second fixing plate correspondingly; and the first clamping wheel and the second clamping wheel synchronously and reversely rotate.

Description

Technical Field

[0001] The present disclosure relates to the technical field of pencil sharpeners, and in particular, to a pen feeding mechanism and an electric pencil sharpener. Background Art

[0002] An automatic pencil sharpener is a new type of stationery that combines the functions of pencil sharpening and automatic pen feeding and retracting. The pen feeding structure is an important component of the pencil sharpener, which is used to clamp and feed the pencil to the pencil sharpening hob so that the pencil sharpening hob can cut the pencil. After the cutting is completed, the tip of the pencil abuts against the pen blocking block, and the pen feeding structure stops feeding the pencil, allowing the user to take out the pencil.

[0003] The working mode of the pencil sharpener is that when the pencil is inserted into the pen inlet hole, the pen body triggers the start contact at the opening of the pen inlet hole. The start contact is used to trigger the micro switch to close the circuit, and the motor starts to work. The pen feeding mechanism feeds the pen inward, and at the same time, the tool holder rotates self, thus starting automatic pencil sharpening. After the pencil sharpening is completed, the pen feeding mechanism retracts the pen outward, the pen body disengages from the start contact at the opening of the pen inlet hole, the micro switch disconnects the circuit, and the motor stops working.

[0004] The utility model patent with the patent number ZL202323491064.X applied by the present applicant discloses a misaligned clamping mechanism and a pencil sharpener using the same. By the misaligned movement of the first clamping wheel and the second clamping wheel, pens with different sizes can be clamped, and the clamping area is large, which is convenient for realizing the pen feeding operation of pencils with different sizes and has a large applicable range for different pen bodies. However, during the pen feeding process, the first clamping wheel is prone to move towards the direction of the first limiting sleeve, causing the first clamping wheel to move too far axially along the first rotating shaft. Similarly, the second clamping wheel is also prone to move towards the direction of the second limiting sleeve, causing the second clamping wheel to move too far axially along the second rotating shaft. This results in an excessive misalignment distance between the first clamping wheel and the second clamping wheel, making it difficult to feed the pen. Summary of the Utility Model

[0005] Aiming at the deficiencies or problems existing in the prior art, the present disclosure provides a pen feeding mechanism and an electric pencil sharpener, and the electric pencil sharpener has a high pen feeding efficiency.

[0006] The technical solution adopted by the present disclosure to solve the above technical problems is as follows: A pen feeding mechanism includes a bracket, a first pen clamping assembly, and a second pen clamping assembly. The first pen clamping assembly and the second pen clamping assembly are arranged on the bracket. The first pen clamping assembly includes a first main shaft, on which a first transmission wheel, a first clamping wheel, a first limiting sleeve, and a first elastic member are sequentially arranged. On the bracket, a first fixing plate and a second fixing plate are arranged. Two ends of the first elastic member are respectively abutted against the first limiting sleeve and the first fixing plate. The second pen clamping assembly includes a second main shaft, on which a second transmission wheel, a second clamping wheel, a second limiting sleeve, and a second elastic member are sequentially arranged. Two ends of the second elastic member are respectively abutted against the second limiting sleeve and the second fixing plate; the first clamping wheel and the second clamping wheel rotate synchronously and in opposite directions.

[0007] As a preferred embodiment, both the first elastic member and the second elastic member are springs.

[0008] As a preferred embodiment, a gear assembly is arranged on the bracket. A spiral section is arranged on the gear assembly, and the spiral section rotates together with the gear assembly. The first transmission wheel and the second transmission wheel are arranged on the movement path of the spiral section. The first transmission wheel and the second transmission wheel rotate as the spiral section rotates. The arrangement of the spiral section not only has a simpler structure but also makes the transmission of the first transmission wheel and the second transmission wheel more stable and reliable.

[0009] As a preferred embodiment, the gear assembly includes a first gear and a second gear. The first gear is arranged on the upper surface of the second gear, and the spiral section is arranged on the upper surface of the first gear.

[0010] As a preferred embodiment, both the first gear and the second gear are circular gears. The diameter of the first gear is smaller than that of the second gear. The first gear and the second gear are rotatably connected. The second gear is connected with a motor, and the motor drives the second gear to rotate.

[0011] As a preferred embodiment, the motor is arranged below the second gear. The second gear is further connected with a passive gear, and the passive gear is connected with the first gear. The rotation of the second gear drives the passive gear to rotate, and the rotation of the passive gear drives the first gear to rotate.

[0012] As a preferred embodiment, the passive gear includes a first passive wheel and a second passive wheel. The second passive wheel meshes with the second gear to drive the passive gear to rotate, and the first passive wheel meshes with the first gear to drive the first gear to rotate.

[0013] As a preferred embodiment, the first fixing plate and the second fixing plate are respectively fixedly connected with the bracket. The first fixing plate is higher than the lower edge of the first elastic member, and the second fixing plate is higher than the lower edge of the second elastic member.

[0014] As a preferred embodiment, one end face of the first clamping wheel is in contact with the first driving wheel, one end face of the second clamping wheel is in contact with the second driving wheel. There is a concave in the middle of the first clamping wheel and the second clamping wheel, and the diameters at both ends of the first clamping wheel and the second clamping wheel are larger than the diameter in the middle.

[0015] Another object of the present disclosure is to provide an electric pencil sharpener, including the pen feeding mechanism described above.

[0016] Compared with existing products, since a first elastic member is provided on the first main shaft, a first fixing plate and a second fixing plate are provided on the bracket, and both ends of the first elastic member are respectively abutted against the first limiting sleeve and the first fixing plate, the first limiting sleeve is tightly attached to the end face of the first clamping wheel under the action of the first elastic member, so that the first clamping wheel cannot move towards the direction of the first limiting sleeve; a second elastic member is provided on the second main shaft, and both ends of the second elastic member are respectively abutted against the second limiting sleeve and the second fixing plate, and the second limiting sleeve is tightly attached to the end face of the second clamping wheel under the action of the second elastic member, so that the second clamping wheel cannot move towards the direction of the second limiting sleeve. In this way, the dislocation of the first clamping wheel and the second clamping wheel can be avoided, thereby making the pen feeding more convenient and efficient. Description of the Drawings

[0017] Hereinafter, the present application will be further described in detail with reference to the drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are only drawn for the purpose of explaining the preferred embodiments and should not be used as a limitation to the scope of the present application. In addition, unless otherwise specified, the drawings only schematically show the composition or structure of the described object and may include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 is one of the structural schematic diagrams of a pen feeding mechanism of the present disclosure;

[0019] Figure 2 is another structural schematic diagram of a pen feeding mechanism of the present disclosure;

[0020] Figure 3 is the structural schematic diagram of the first pen clamping assembly and the second pen clamping assembly of the present disclosure;

[0021] Figure 4 is the structural schematic diagram of the bracket of the present disclosure;

[0022] Figure 5 is the structural schematic diagram of the first gear of the present disclosure;

[0023] Figure 6 is the structural schematic diagram of the driven gear of the present disclosure;

[0024] Figure 7This is a schematic structural diagram of the electric pencil sharpener of the present disclosure.

[0025] Explanation of reference numerals in the drawings:

[0026] 1. First pencil clamping assembly; 11. First main shaft; 12. First transmission wheel; 13. First clamping wheel; 14. First limiting sleeve; 15. First elastic member; 2. Second pencil clamping assembly; 21. Second main shaft; 22. Second transmission wheel; 23. Second clamping wheel; 24. Second limiting sleeve; 25. Second elastic member; 3. Second fixing plate; 4. First fixing plate; 5. Bracket; 6. Gear assembly; 61. First gear; 62. Second gear; 7. Driven gear; 71. First driven wheel; 72. Second driven wheel; 8. Second through hole; 10. Spiral section; 101. First arc section; 102. Second arc section; 103. Third arc section; 104. Fourth arc section. Detailed implementation manners

[0027] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure will be described in detail, clearly and completely below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure.

[0028] Those skilled in the art should understand that in the disclosure of the present utility model, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present utility model.

[0029] Please refer to Figures 1 - 3As shown in the figure, the present disclosure provides a pen feeding mechanism, which includes a bracket 5, a first pen clamping assembly 1 and a second pen clamping assembly 2. The first pen clamping assembly 1 and the second pen clamping assembly 2 are arranged on the bracket 5. The first pen clamping assembly 1 includes a first main shaft 11, and a first transmission wheel 12, a first clamping wheel 13, a first limiting sleeve 14 and a first elastic member 15 are sequentially arranged on the first main shaft 11. A first fixing plate 4 and a second fixing plate 3 are arranged on the bracket 5. Two ends of the first elastic member 15 respectively abut against the first limiting sleeve 14 and the first fixing plate 4. The second pen clamping assembly 2 includes a second main shaft 21, and a second transmission wheel 22, a second clamping wheel 23, a second limiting sleeve 24 and a second elastic member 25 are sequentially arranged on the second main shaft 21. Two ends of the second elastic member 25 respectively abut against the second limiting sleeve 24 and the second fixing plate 3; the first clamping wheel 13 and the second clamping wheel 23 rotate synchronously and in opposite directions. A first through hole for a pencil to pass through is formed on the bracket 5. The first main shaft 11 and the second main shaft 21 are respectively located on two sides of the first through hole. The first clamping wheel 13 and the second clamping wheel 23 are oppositely arranged and rotate synchronously and in opposite directions to clamp the body of the pencil for pen feeding or pen retracting. Since the first elastic member 15 is arranged on the first main shaft 11, the first fixing plate 4 and the second fixing plate 3 are arranged on the bracket 5, two ends of the first elastic member 15 respectively abut against the first limiting sleeve 14 and the first fixing plate 4, and the first limiting sleeve 14 is closely attached to the end face of the first clamping wheel 13 under the action of the first elastic member 15, so that the first clamping wheel 13 cannot move towards the direction of the first limiting sleeve 14; the second elastic member 25 is arranged on the second main shaft 21, two ends of the second elastic member 25 respectively abut against the second limiting sleeve 24 and the second fixing plate 3, and the second limiting sleeve 24 is closely attached to the end face of the second clamping wheel 23 under the action of the second elastic member 25, so that the second clamping wheel 23 cannot move towards the direction of the second limiting sleeve 24. In this way, the dislocation of the first clamping wheel 13 and the second clamping wheel 23 can be avoided, and the pen feeding is made more convenient and efficient.

[0030] It should be noted that both the first elastic member 15 and the second elastic member 25 are springs. The first fixing plate 4 and the second fixing plate 3 are respectively fixedly connected to the bracket 5. The first fixing plate 4 is higher than the lower edge of the first elastic member 15, and the second fixing plate 3 is higher than the lower edge of the second elastic member 25, so that the first elastic member 15 can effectively abut against the first fixing plate 4 to apply a force to the first limiting sleeve 14 towards the direction of the first clamping wheel 13; the second elastic member 25 can effectively abut against the second fixing plate 3 to apply a force to the second limiting sleeve 24 towards the direction of the second clamping wheel 23, and the excessive dislocation of the first clamping wheel 13 and the second clamping wheel 23 is avoided, which affects the pen feeding efficiency.

[0031] Please refer to Figures 2 - 4As shown, in an embodiment of the present disclosure, a gear assembly 6 is provided on a bracket 5, and a spiral section 10 is provided on the gear assembly 6. The spiral section 10 rotates together with the gear assembly 6, and a first transmission wheel 12 and a second transmission wheel 22 are arranged on the movement path of the spiral section 10. The first transmission wheel 12 and the second transmission wheel 22 rotate as the spiral section 10 rotates. The arrangement of the spiral section 10 not only has a simpler structure but also provides a more stable and reliable transmission for the first transmission wheel 12 and the second transmission wheel 22. Specifically, the gear assembly 6 includes a circular first gear 61 and a second gear 62. The first gear 61 is arranged on the upper surface of the second gear 62, and the spiral section 10 is arranged on the upper surface of the first gear 61. A second through hole 8 corresponding to the first through hole is provided on the first gear 61 for the insertion of a pencil. The spiral section 10 is composed of four arc segments arranged around the second through hole 8.

[0032] Please refer to Figure 5 As shown, further, the arc segments are respectively a first arc segment 101, a second arc segment 102, a third arc segment 103, and a fourth arc segment 104. The first arc segment 101, the second arc segment 102, the third arc segment 103, and the fourth arc segment 104 are respectively provided with a head end and a tail end, and its tail end is closer to the second through hole 8 than the head end. More specifically, the tail end of the second arc segment 102 is arranged close to the head end of the first arc segment 101 and is located inside the first arc segment 101. The projection of the head end of the first arc segment 101 in the radial direction of the first gear 61 is on the second arc segment 102; the tail end of the third arc segment 103 is arranged close to the head end of the second arc segment 102 and is located inside the second arc segment 102. The projection of the head end of the second arc segment 102 in the radial direction of the first gear 61 is on the third arc segment 103; the tail end of the fourth arc segment 104 is arranged close to the head end of the third arc segment 103 and is located inside the third arc segment 103. The projection of the head end of the third arc segment 103 in the radial direction of the first gear 61 is on the fourth arc segment 104; the tail end of the first arc segment 101 is arranged close to the head end of the fourth arc segment 104 and is located inside the fourth arc segment 104. The projection of the head end of the fourth arc segment 104 in the radial direction of the first gear 61 is on the first arc segment 101. This enables the first transmission wheel 12 and the second transmission wheel 22 to always maintain a highly meshed state with the spiral section 10 during operation, avoiding the situation of jamming and pausing of the first transmission wheel 12 and the second transmission wheel 22 during operation, and ensuring the stability of the first transmission wheel 12 and the second transmission wheel 22 during rotation with the gear assembly 6 and the uniformity of the rotational speed.

[0033] To make the gear assembly 6 operate more smoothly, the diameter of the first gear 61 is smaller than that of the second gear 62. The first gear 61 and the second gear 62 are rotatably connected. The second gear 62 is connected to a motor, and the output shaft of the motor is connected to the second gear 62. The motor drives the second gear 62 to rotate. Specifically, the motor is arranged below the second gear 62. The second gear 62 is also connected to a driven gear 7, and the driven gear 7 is connected to the first gear 61. The rotation of the second gear 62 drives the rotation of the driven gear 7, and the rotation of the driven gear 7 drives the rotation of the first gear 61.

[0034] As Figure 6 shown, preferably, the driven gear 7 includes an integrally formed first driven wheel 71 and a second driven wheel 72. The diameter of the first driven wheel 71 is larger than that of the second driven wheel 72, and the first driven wheel 71 is arranged on the upper surface of the second driven wheel 72. Specifically, the second driven wheel 72 meshes with the second gear 62 to drive the rotation of the driven gear 7, and the first driven wheel 71 meshes with the first gear 61 to drive the rotation of the first gear 61. That is, under the drive of the motor, the second gear 62 rotates, the rotation of the second gear 62 drives the rotation of the driven gear 7, and the rotation of the driven gear 7 drives the rotation of the first gear 61. The spiral section 10 is arranged on the upper surface of the first gear 61 and rotates together with the first gear 61. The spiral section 10 is equivalent to a "track", and the first transmission wheel 12 and the second transmission wheel 22 rotate along this "track" accordingly. One end face of the first clamping wheel 13 contacts the first transmission wheel 12, and the first transmission wheel 12 drives the first clamping wheel 13 to rotate by the friction force between it and the first clamping wheel 13. One end face of the second clamping wheel 23 contacts the second transmission wheel 22, and the second transmission wheel 22 drives the second clamping wheel 23 to rotate by the friction force between it and the second clamping wheel 23. The first clamping wheel 13 and the second clamping wheel 23 rotate synchronously and in opposite directions to clamp the body of the pencil for feeding or retracting the pencil.

[0035] A concave is provided in the middle of both the first clamping wheel 13 and the second clamping wheel 23, and the diameters of both ends of the first clamping wheel 13 and the second clamping wheel 23 are greater than the diameter of the middle. When sharpening a pencil, the pencil extends between the concaves of the first clamping wheel 13 and the second clamping wheel 23 and is clamped. The first clamping wheel 13 and the second clamping wheel 23 rotate synchronously and in opposite directions under the action of the first driving wheel 12 and the second driving wheel 22 respectively. In this application, due to the provision of the first elastic member 15 and the second elastic member 25, the first clamping wheel 13 is closely attached to the first driving wheel 12 under the action of the first elastic member 15 and rotates therewith under the action of friction. The second clamping wheel 23 is closely attached to the second driving wheel 22 under the action of the second elastic member 25 and rotates therewith under the action of friction, so that the rotation speeds of the first clamping wheel 13 and the second clamping wheel 23 are stable and uniform. In addition, due to the provision of the first elastic member 15 and the second elastic member 25, the concaves of the first clamping wheel 13 and the second clamping wheel 23 can always be in an aligned state, avoiding difficulty in inserting the pen caused by misalignment between the two.

[0036] Preferably, the first clamping wheel 13 and the second clamping wheel 23 are made of elastic materials such as rubber, silica gel, etc., and no specific limitation is made here. The use of elastic materials for the first clamping wheel 13 and the second clamping wheel 23 endows them with a certain elastic deformation ability to adapt to pencils of different thicknesses of the pen body, so that the pen feeding mechanism has a larger scope of use. In addition, the elastic material has a large friction force, which can enhance the friction force between the end face of the first clamping wheel 13 and the first driving wheel 12, and the friction force between the end face of the second clamping wheel 23 and the second driving wheel 22, so that the first driving wheel 12 and the second driving wheel 22 can better drive the first clamping wheel 13 and the second clamping wheel 23, improving the transmission efficiency.

[0037] As Figure 7 shown, this application also provides an electric pencil sharpener, including the above-mentioned pen feeding mechanism.

[0038] The above has introduced this application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand this application and the core idea. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of this application, several improvements and modifications can still be made to this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A pen delivery mechanism, characterized in that, It includes a bracket (5), a first pen - clamping component (1) and a second pen - clamping component (2). The first pen - clamping component (1) and the second pen - clamping component (2) are arranged on the bracket (5). The first pen - clamping component (1) includes a first main shaft (11). A first transmission wheel (12), a first clamping wheel (13), a first limiting sleeve (14) and a first elastic component (15) are sequentially arranged on the first main shaft (11). A first fixed plate (4) and a second fixed plate (3) are arranged on the bracket (5). Two ends of the first elastic component (15) are respectively abutted against the first limiting sleeve (14) and the first fixed plate (4). The second pen - clamping component (2) includes a second main shaft (21). A second transmission wheel (22), a second clamping wheel (23), a second limiting sleeve (24) and a second elastic component (25) are sequentially arranged on the second main shaft (21). Two ends of the second elastic component (25) are respectively abutted against the second limiting sleeve (24) and the second fixed plate (3). The first clamping wheel (13) and the second clamping wheel (23) rotate synchronously and in opposite directions.

2. The pen delivery mechanism according to claim 1, wherein, Both the first elastic component (15) and the second elastic component (25) are springs.

3. The pen delivery mechanism according to claim 1, characterized in that, A gear component (6) is arranged on the bracket (5). A spiral section (10) is arranged on the gear component (6). The spiral section (10) rotates together with the gear component (6). The first transmission wheel (12) and the second transmission wheel (22) are arranged on the movement path of the spiral section (10).

4. The pen delivery mechanism according to claim 3, characterized in that, The gear component (6) includes a first gear (61) and a second gear (62). The first gear (61) is arranged on the upper surface of the second gear (62). The spiral section (10) is arranged on the upper surface of the first gear (61).

5. The pen delivery mechanism according to claim 4, characterized in that, Both the first gear (61) and the second gear (62) are circular gears. The diameter of the first gear (61) is smaller than that of the second gear (62). The first gear (61) and the second gear (62) are rotationally connected. The second gear (62) is connected with a motor, and the motor drives the second gear (62) to rotate.

6. The pen delivery mechanism according to claim 5, wherein, The motor is arranged below the second gear (62). The second gear (62) is also connected with a passive gear (7). The passive gear (7) is connected with the first gear (61). The rotation of the second gear (62) drives the passive gear (7) to rotate, and the rotation of the passive gear (7) drives the first gear (61) to rotate.

7. The pen delivery mechanism according to claim 6, wherein The passive gear (7) includes a first passive wheel (71) and a second passive wheel (72). The second passive wheel (72) meshes with the second gear (62) to drive the passive gear (7) to rotate. The first passive wheel (71) meshes with the first gear (61) to drive the first gear (61) to rotate.

8. The pen delivery mechanism according to claim 1, wherein, The first fixed plate (4) and the second fixed plate (3) are respectively fixedly connected with the bracket (5). The first fixed plate (4) is higher than the lower edge of the first elastic component (15), and the second fixed plate (3) is higher than the lower edge of the second elastic component (25).

9. The pen feeding mechanism according to claim 1, characterized in that, One end face of the first clamping wheel (13) is in contact with the first driving wheel (12), one end face of the second clamping wheel (23) is in contact with the second driving wheel (22), a concave is provided in the middle of the first clamping wheel (13) and the second clamping wheel (23), and the diameters at both ends of the first clamping wheel (13) and the second clamping wheel (23) are larger than the diameter in the middle.

10. An electric pencil sharpener, characterized in that, It includes the pen feeding mechanism according to any one of claims 1 to 9.

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