Limiting device of pencil feeding assembly and automatic pencil sharpener applying limiting device

Abstract

The utility model discloses a limiting device of a pencil feeding assembly and an automatic pencil sharpener using the same, and the limiting device of the pencil feeding assembly is used for being matched with a machine body provided with a transmission rod, and comprises the pencil feeding assembly, the pencil feeding assembly comprises a rotating disc and a transmission gear; the upper cover is detachably connected with the machine body; concave-convex structures which are matched with each other are arranged between the upper cover and the pen feeding assembly, and the concave-convex structures are used for limiting relative rotation of the upper cover and the pen feeding assembly. According to the limiting device of the pen feeding assembly, the position of the upper cover and the position of the machine body are fixed through the concave-convex structure, it is ensured that the pen feeding assembly is kept at the installation position, the situation that a transmission rod and a transmission gear are prone to disengagement due to stress, and consequently slipping and non-transmission are caused is avoided, and stable connection of the pen feeding assembly and the machine body is ensured; and normal operation of the pencil sharpener is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic pencil sharpeners, and more specifically to a limiting device of a pen feeding component and an automatic pencil sharpener using the same. Background Art

[0002] The pen feed assembly of the automatic pencil sharpener is one of the core components for realizing the automatic pencil sharpening function. It includes a turntable and a pair of parallel pen feed and retract rubber rollers. The working principle of the pen feed assembly is as follows: the gear structure on the pen feed and retract rubber rollers is meshed and connected with the raised structure on the turntable surface, so that the rotation of the turntable can drive the two pen feed and retract rubber rollers to rotate synchronously and in opposite directions. The change in the rotation direction of the turntable will cause the pen feed and retract rubber rollers to switch between the pen feed mode and the pen retract mode, thereby realizing the automatic pencil sharpening function.

[0003] In traditional automatic pencil sharpeners, the motor drives the turntable to rotate through the tool holder. Our company adopts a new transmission structure, namely the transmission rod + transmission gear structure: the motor drives the transmission rod to rotate, and the transmission gear installed on the pen feed assembly always keeps meshing with the turntable. When the pen feed assembly is installed in place, the transmission gear meshes with the transmission rod, converting the power output of the motor into the driving force of the turntable.

[0004] Although the transmission rod + transmission gear structure has advantages, there are also some potential problems:

[0005] The transmission rod and the transmission gear are easily disengaged due to force, resulting in slippage and failure of transmission, which may affect the normal operation of the automatic pencil sharpener. Summary of the invention

[0006] The utility model aims to solve one of the technical problems in the related art to a certain extent. To this end, the utility model proposes a limiting device for the pen feed assembly, which ensures that the pen feed assembly is kept in the installation position through the concave-convex structure and the upper cover and the machine body, thereby avoiding the occurrence of slipping and non-transmission caused by the transmission rod and the transmission gear being easily disengaged due to force, ensuring the stable connection between the pen feed assembly and the machine body, and ensuring the normal operation of the pencil sharpener.

[0007] The utility model also provides an automatic pencil sharpener with the limiting device.

[0008] The technical solution adopted by the utility model is: to provide a limiting device for a pen feeding assembly, which is used in conjunction with a body provided with a transmission rod, and includes:

[0009] A pen feeding assembly, the pen feeding assembly comprising a rotating disk and a transmission gear;

[0010] An upper cover detachably connected to the body;

[0011] A concave-convex structure that cooperates with each other is provided between the upper cover and the pen feeding assembly, and the concave-convex structure is used to limit the relative rotation between the upper cover and the pen feeding assembly.

[0012] When the upper cover is installed in place, the concave-convex structure can limit the relative rotation between the upper cover and the pen feed assembly, that is, the pen feed assembly is fixed in the circumferential position with the machine body through the concave-convex structure and the upper cover. This avoids the transmission rod and the transmission gear being easily disengaged due to force, causing slippage and non-transmission, ensures the stable connection between the pen feed assembly and the machine body, and further improves the reliability and safety of the automatic pencil sharpener.

[0013] According to one embodiment of the utility model, the concave-convex structure includes a limiting groove and a limiting protrusion, the limiting groove is arranged on one of the upper cover and the pen feeding assembly, and the limiting protrusion is arranged on the other; when the upper cover is connected to the body, the limiting protrusion is inserted into the limiting groove, thereby limiting the relative rotation of the upper cover and the pen feeding assembly.

[0014] According to an embodiment of the present invention, the upper cover is connected to the body via a rotating buckle; that is, the upper cover can be installed or removed by tightening or loosening the upper cover.

[0015] According to an embodiment of the utility model, a tactile buckle is provided between the upper cover and the body; that is, one of the upper cover and the body is provided with a tactile protrusion, and the other is provided with a tactile groove. When the upper cover is installed in place on the body, the tactile protrusion is snapped into the tactile groove and is directly snapped and pulled out. Whether the buckle is installed in place can be judged by tactile feel and sound. The tactile buckle not only has a position indicating function, but also can strengthen the locking force of the buckle connection between the upper cover and the body.

[0016] According to one embodiment of the utility model, the pen feeder assembly has a positioning portion, and when the upper cover is connected to the body, the positioning portion abuts between the upper cover and the body to limit the axial position of the pen feeder assembly; that is, the positioning portion is used to limit the movement of the pen feeder assembly toward or away from the upper cover.

[0017] According to an embodiment of the utility model, a groove is provided on the side of the positioning portion facing the fuselage, and the fuselage has an abutment portion adapted to the groove; the arrangement of the groove and the abutment portion is used to prevent misalignment between the positioning portion and the fuselage.

[0018] According to one embodiment of the utility model, the positioning portion is provided with a sloped surface on one side facing the upper cover; when the upper cover is connected to the fuselage, the inner surface of the upper cover abuts against the sloped surface, so that the groove is firmly fixed on the abutting portion, thereby completing the abutment of the positioning portion between the upper cover and the fuselage when the upper cover is connected to the fuselage.

[0019] According to one embodiment of the utility model, a waste chip chamber is provided on one side of the body, and a lateral stop is provided on the side of the upper cover facing the waste chip chamber; the waste chip chamber is detachably connected to a waste chip box, and the lateral stop is used to limit the assembly of the waste chip box.

[0020] According to one embodiment of the utility model, the side stop has a guide surface, and the fuselage is provided with a protrusion corresponding to the guide surface; when the upper cover is connected to the fuselage by a rotation buckle, the guide surface contacts the protrusion on the fuselage to guide the positioning part to rotate into a predetermined position.

[0021] An automatic pencil sharpener comprises a machine body and any one of the above-mentioned limiting devices of the pen feeding assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A perspective view of a pen feed assembly in an embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the pen feeding assembly in the embodiment of the utility model;

[0025] Figure 3 A perspective view of an automatic pencil sharpener according to an embodiment of the utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the pen feeding assembly in the embodiment of the utility model;

[0027] Figure 5 A three-dimensional diagram of the upper cover in the embodiment of the utility model;

[0028] Figure 6 A perspective view of the upper cover in the embodiment of the utility model;

[0029] Figure 7 A three-dimensional diagram of the body of the automatic pencil sharpener in the embodiment of the utility model;

[0030] Figure 8 It is a partial enlarged view of the body of the automatic pencil sharpener in the embodiment of the utility model;

[0031] Fig. 9 It is a side view of the body of the automatic pencil sharpener in the embodiment of the utility model;

[0032] Fig.10It is a schematic structural diagram of an automatic pencil sharpener in an embodiment of the utility model.

[0033] Description of the numbers in the figure:

[0034] 10. Pen feeding assembly; 20. Body; 30. Upper cover; 40. Waste box;

[0035] 11. Housing; 12. Turntable; 13. Rubber roller for pen advance and retract; 14. Transmission gear; 15. Positioning part; 16. Pen feed hole; 17. Limiting groove;

[0036] 151, groove; 152, slope;

[0037] 21. Screw-in groove; 22. Abutment portion; 23. Protrusion; 24. Waste chip chamber; 25. Transmission rod; 26. Tool holder cover;

[0038] 211, feel raised;

[0039] 31. Limiting protrusion; 32. Screw-in buckle; 33. Side stopper;

[0040] 321, hand-feel groove;

[0041] 331. Guide surface. DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention. Embodiment 1

[0043] like Figure 1-10 As shown, in this embodiment, a limiting device of a pen feeding assembly 10 is disclosed, which is used in conjunction with a body 20 provided with a transmission rod 25, and includes:

[0044] A pen feeding assembly 10, wherein the pen feeding assembly 10 comprises a rotating disk 12 and a transmission gear 14;

[0045] An upper cover 30 detachably connected to the body 20;

[0046] A concave-convex structure that cooperates with each other is provided between the upper cover 30 and the pen feeding assembly 10 , and the concave-convex structure is used to limit the relative rotation of the upper cover 30 and the pen feeding assembly 10 .

[0047] Combination Figure 1-2As shown, in this embodiment, the pen feed assembly 10 includes a housing 11, a turntable 12 and a pen advance and retreat rubber roller 13. The turntable 12 and the pen advance and retreat rubber roller 13 are both arranged inside the housing 11, and the gear structure on the pen advance and retreat rubber roller 13 is meshed and connected with the raised structure on the surface of the turntable 12. An outer tooth is provided on the outer ring of the turntable 12, and a transmission gear 14 is rotatably provided on the surface of the housing 11. The housing 11 is provided with an opening, and the transmission gear 14 meshes with the outer tooth of the turntable 12 through the opening. A pen feed hole 16 is provided through the center position of the housing 11, and the pen advance and retreat rubber roller 13 is symmetrically arranged with the pen feed hole 16 as the center. A transmission rod 25 and a tool holder cover 26 are provided in the body 20, and the transmission rod 25 is connected to the output shaft of the motor (not shown in the figure) in a transmission manner. A tool holder is provided in the tool holder cover 26, and the tool holder is connected to the output shaft of the motor in a transmission manner. When the motor is working, it synchronously drives the tool holder and the transmission rod 25 to rotate. When the pen feeding assembly 10 is installed in place, the gear on the upper end of the transmission rod 25 is meshed and connected with the transmission gear 14. The transmission rod 25 drives the pen feeding and retracting rubber roller 13 to feed or retract the pen through the transmission gear 14 and the rotating disk 12.

[0048] Furthermore, a limiting groove 17 is provided on the side of the shell 11 facing the upper cover 30, and correspondingly, a limiting protrusion 31 is provided on the side of the shell 11 facing the upper cover 30. When the upper cover 30 is connected to the edge of the mouth of the body 20, the limiting protrusion 31 is inserted into the limiting groove 17, thereby limiting the relative rotation of the upper cover 30 and the pen feeding assembly 10.

[0049] Specifically, combined Figure 5-8 As shown, in this embodiment, the upper cover 30 is connected to the body 20 by a rotating buckle, and a hand-feel buckle is provided between the upper cover 30 and the body 20. That is, a screw-in groove 21 is provided at the edge of the mouth of the body 20, and a screw-in buckle 32 is provided on the inner wall of the shell 11. The screw-in groove 21 and the screw-in buckle 32 form a rotating buckle structure, and the upper cover 30 is detachably connected to the body 20 by rotating. A hand-feel protrusion 211 is provided in the screw-in groove 21, and a hand-feel groove 321 is provided in the screw-in buckle 32. The hand-feel protrusion 211 is inserted into the hand-feel groove 321, and the buckle is directly buckled and pulled out, and the buckle is judged by hand feel and sound whether it is installed in place.

[0050] Specifically, combined Figure 2 and Figure 4As shown, the pen feeding assembly 10 has a positioning portion 15, which is located on the surface of the housing 11 and is formed by the housing 11 extending outward. When the upper cover 30 is connected to the body 20, the positioning portion 15 abuts between the upper cover 30 and the body 20, and is used for axial positioning of the pen feeding assembly 10; that is, the positioning portion 15 is used to limit the movement of the pen feeding assembly 10 toward or away from the upper cover 30. The positioning portion 15 is provided with a groove 151 on the side facing the body 20, and the body 20 has an abutment portion 22 adapted to the groove 151. The positioning portion 15 is provided with an inclined surface 152 on the side facing the upper cover 30; when the upper cover 30 is connected to the body 20, the inner surface of the upper cover 30 abuts against the inclined surface 152, so that the groove 151 is firmly fixed on the abutment portion 22, thereby completing the positioning portion 15 abutting between the upper cover 30 and the body 20 when the upper cover 30 is connected to the body 20.

[0051] Specifically, combined Fig.10 As shown, in this embodiment, a waste chamber 24 is provided on one side of the body 20 of the automatic pencil sharpener, and the waste chamber 24 is detachably connected to a waste box 40. A lateral stop 33 is provided on the side of the upper cover 30 facing the waste chamber 24; the waste chamber 24 is detachably connected to the waste box 40, and the lateral stop 33 is used to limit the assembly of the waste box 40. The lateral stop 33 has a guide surface 331, and the body 20 is provided with a protrusion 23 corresponding to the guide surface 331, and the protrusion 23 is formed by the edge of the mouth of the body 20 extending toward the upper cover 30; when the upper cover 30 is connected to the body 20 by rotation and buckling, the guide surface 331 contacts the protrusion 23 on the body 20, and is used to guide the positioning part 15 to rotate into a predetermined position.

[0052] Combination Fig.10 As shown, in another embodiment, an automatic pencil sharpener is disclosed, including a body 20 and a limiting device of the pen feeding assembly 10 described in this embodiment.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing 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 therefore cannot be understood as a limitation on the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0058] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A limiting device for a pen feeding assembly, which is used in conjunction with a body provided with a transmission rod, comprising: A pen feeding assembly, the pen feeding assembly comprising a rotating disk and a transmission gear; An upper cover detachably connected to the body; It is characterized in that a concave-convex structure that cooperates with each other is provided between the upper cover and the pen feeding assembly, and the concave-convex structure is used to limit the relative rotation between the upper cover and the pen feeding assembly.

2. A limiting device for a pen feeding assembly according to claim 1, characterized in that: The concave-convex structure includes a limiting groove and a limiting protrusion, the limiting groove is arranged on one of the upper cover and the pen feeding assembly, and the limiting protrusion is arranged on the other.

3. A limiting device for a pen feeding assembly according to claim 1, characterized in that: The upper cover is connected to the body via a rotating buckle.

4. A limiting device for a pen feeding assembly according to claim 1, characterized in that: A hand-feel buckle is provided between the upper cover and the body.

5. A limiting device for a pen feeding assembly according to claim 1, characterized in that: The pen feeding assembly has a positioning portion. When the upper cover is connected to the body, the positioning portion abuts between the upper cover and the body to limit the axial position of the pen feeding assembly.

6. A limiting device for a pen feeding assembly according to claim 5, characterized in that: A groove is provided on one side of the positioning portion facing the fuselage, and the fuselage has an abutment portion adapted to the groove.

7. A limiting device for a pen feeding assembly according to claim 5, characterized in that: A slope is provided on one side of the positioning portion facing the upper cover.

8. A limiting device for a pen feeding assembly according to claim 1, characterized in that: A waste chip cavity is provided on one side of the body, and a lateral stop is provided on the side of the upper cover facing the waste chip cavity.

9. A limiting device for a pen feeding assembly according to claim 8, characterized in that: The lateral stop has a guiding surface, and the fuselage is provided with a protruding portion corresponding to the guiding surface.

10. An automatic pencil sharpener, characterized in that: It comprises a body and a limiting device of the pen feeding assembly as described in any one of claims 1-9.

Images