Pencil sharpening prompting device and pencil sharpener

Abstract

The utility model relates to a pencil sharpening prompting device which comprises a gear ring, and a circle of inner teeth are arranged on the inner circumferential wall of the gear ring. A pencil sharpening hole for inserting a pencil is formed in the knife rest; the acting piece is movably arranged between the outlet end of the pencil sharpening hole and the gear ring; and the acting piece moves towards the gear ring based on the pushing of a pen point extending out of the pencil sharpening hole, and circumferentially interferes with the inner teeth of the gear ring. The pencil sharpening prompting device is simple in structure, a user does not need to additionally conduct reset operation, and sharpening prompting can keep high reliability for a long time. The utility model further relates to a pencil sharpener which comprises a machine shell, a rocker arm and the pencil sharpening prompting device, the gear ring is fixed on the machine shell, and the knife rest is arranged in the machine shell and connected with the rocker arm. The pencil sharpener is low in cost and low in failure rate.

Description

Technical Field

[0001] This utility model relates to a pencil sharpening reminder device, and also to a pencil sharpener that uses the pencil sharpening reminder device. Background Technology

[0002] A pencil sharpener uses the relative rotation of a blade and an inserted pencil to cut through the outer wood layer of the pencil to expose the lead. The blade is angled relative to the pencil's axis to sharpen the lead to a point for writing and drawing. However, ordinary pencil sharpeners cannot detect when the lead is sharpened, leading to blind sharpening and continuous sharpening. This can break the lead and waste resources, increasing the cost of pencils. Therefore, a pencil sharpener that can promptly indicate when sharpening is complete is needed.

[0003] Chinese invention patent CN112744012B (application number 201911052584.6), entitled "A Pencil Sharpener with Sharpening Indication," and Chinese utility model patent CN221213231U (application number 202322609479.6), entitled "A Pencil Sharpener with Sharpening Indication," both disclose pencil sharpeners that include an indication button / switch and a trigger / transmission component. During sharpening, the sharpened pencil tip pushes the trigger / transmission component, triggering the indication button / switch to pop out and indicate that sharpening is complete. This indication structure requires transmission, is complex, and has low reliability. Over long-term use, it is prone to jamming or structural failure, and a reset operation is required after each sharpening indication. Utility Model Content

[0004] The first technical problem to be solved by this utility model is to provide a pencil sharpening reminder device with a simple structure that does not require additional user reset operation and can maintain high reliability of sharpening reminder for a long time, in contrast to the above-mentioned prior art.

[0005] The second technical problem to be solved by this utility model is to provide a pencil sharpener that applies the aforementioned pencil sharpening reminder device, in contrast to the prior art.

[0006] The technical solution adopted by this utility model to solve the first technical problem mentioned above is: a pencil sharpening reminder device, comprising...

[0007] The gear ring has a ring of internal teeth on its inner circumferential wall;

[0008] The pencil holder has an internally shaped hole for inserting a pencil for sharpening.

[0009] Its features include:

[0010] The actuating element is movably disposed between the exit end of the pencil sharpening hole and the gear ring;

[0011] The actuating element moves toward the gear ring based on the push of the pen tip extending from the sharpening hole, and interferes circumferentially with the inner teeth of the gear ring.

[0012] With a simpler structure, the actuating element is movably mounted on the tool holder.

[0013] To provide movement guidance for the actuator, the tool holder is provided with a guide rod, and the actuator is slidably mounted on the guide rod.

[0014] To improve the stability of the movement of the actuating element, at least two guide rods are provided and distributed around the outer periphery of the pencil sharpening hole.

[0015] For ease of assembly, the actuating component is detachably mounted on the guide rod.

[0016] To avoid jamming and structural damage, the actuating element includes a base and a paddle mounted on the base. The paddle extends radially along the gear ring and is deformable, emitting a beep when it interferes with the rotation of the gear ring's inner teeth.

[0017] In order to reduce the contact area between the actuating element and the tool holder and improve the flexibility of the actuating element moving on the tool holder, a transmission element may also be movably provided on the tool holder, and the transmission element is disposed between the sharpening hole and the actuating element.

[0018] The technical solution adopted by this utility model to solve the second technical problem mentioned above is: a pencil sharpener, including a housing and a rocker arm, characterized in that: it also includes a pencil sharpening prompt device as described above, the toothed ring is fixed on the housing, and the blade holder is disposed inside the housing and connected to the rocker arm.

[0019] Compared with existing technologies, the advantages of this invention are as follows: The pencil sharpening indicator device of this invention has a movable actuator between the sharpening hole and the gear ring. During use, the pencil tip sharpened in the sharpening hole presses against the actuator towards the gear ring. The interference between the actuator and the gear ring provides a sharpening indication. This pencil sharpening indicator device utilizes the inherent gear ring structure in the pencil sharpener, eliminating the need for additional dedicated indicator components. This simplifies the structure, reduces structural factors affecting sharpening accuracy, and solves potential issues of jamming and component lifespan during transmission, significantly improving the reliability of the sharpening indication. Furthermore, the pencil tip's movement direction is consistent with the actuator's movement direction, making the transmission between them more direct. The pencil tip only needs to exert a small force on the actuator, greatly improving the sensitivity of the sharpening indication. Moreover, based on the interference indication relationship between the actuator and the gear ring, the actuator does not require special resetting. When the pencil tip releases its force on the actuator, the actuator naturally releases its interference relationship with the gear ring, further simplifying user operation. Attached Figure Description

[0020] Figure 1 This is a perspective view of the pencil sharpening reminder device in Embodiment 1 of this utility model, in a state where the toothed ring and the active component do not interfere with each other.

[0021] Figure 2 This is a perspective view of the pencil sharpening reminder device in Embodiment 1 of this utility model under the condition that the toothed ring and the active component interfere with each other.

[0022] Figure 3 This is a perspective view of the pencil sharpening reminder device in Embodiment 2 of this utility model under the condition of interference between the toothed ring and the active component. Detailed Implementation

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

[0024] Example 1

[0025] like Figure 1 and Figure 2 As shown, the pencil sharpening reminder device in this embodiment includes a toothed ring 1, a blade holder 2, and an actuating element 3.

[0026] The gear ring 1 in the pencil sharpener meshes with the roller cutter 6, allowing them to roll relative to each other to cut the pencil tip. The inner circumferential wall of the gear ring 1 has a circumferential tooth 11 for meshing and driving the roller cutter 6.

[0027] The pencil holder 2 is located on one side of the gear ring 1. The pencil holder 2 has a pencil-sharpening hole 21 formed inside for inserting a pencil. The pencil-sharpening hole 21 is typically conical with a slit on its side. The hobbing cutter 6 is rotatably positioned outside the pencil holder 2, corresponding to the position of this slit. Based on the engagement between the hobbing cutter 6 and the gear ring 1, the hobbing cutter 6 can rotate around its axis during operation, thereby sharpening the pencil tip inserted into the pencil-sharpening hole 21. As the pencil tip is gradually sharpened, it also moves towards the gear ring 1. The end of the pencil-sharpening hole 21 near the gear ring 1 is open to allow the sharpened pencil tip to protrude from the hole, forming the exit end of the pencil-sharpening hole 21 near the gear ring 1.

[0028] The actuating element 3 is movably positioned between the end of the sharpening hole 21 and the gear ring 1. Depending on structural requirements, the actuating element 3 can be mounted on the outer casing of the pencil sharpener, or on an independently constructed structure within the casing. For structural simplicity and to avoid interference with other structures, in this embodiment, the actuating element 3 is directly and movably mounted on the blade holder 2, maintaining a synchronous position with the blade holder 2 in the circumferential direction. As the pencil is sharpened to the desired point, the actuating element 3 moves towards the gear ring 1 based on the push of the pencil tip extending from the sharpening hole 21, and circumferentially interferes with the inner teeth 11 of the gear ring 1. The relative interference structure between the actuating element 3 and the gear ring 1 is specifically configured as needed. For example, a high-friction structure layer can be provided on the side of the actuating element 3 facing the gear ring 1. The actuating element 3, based on the push of the pencil tip, can act on the end face of the gear ring 1. When the actuating element 3 presses against the end face of the gear ring 1, the friction between the two increases, enhancing the user's turning force and thus providing information that the pencil is sharpened to the desired point. Alternatively, the actuating element 3 can be embedded inside the gear ring 1 and abut against the internal teeth 11 of the gear ring 1, thereby preventing relative rotation between the two. This allows the user to obtain information about the sharpening being complete based on the user's rotational feel. However, both of these types of sharpening completion indicators are prone to causing wear on the gear ring 1.

[0029] To make the sharpening indication more obvious and to avoid wear on the gear ring 1, the actuating element 3 in this embodiment includes a base 31 and a paddle 32 disposed on the base 31. The paddle 32 extends radially along the gear ring 1 and is deformable, emitting a sound when it interferes with the rotation of the inner teeth 11 of the rotating gear ring 1. In use, when the pencil is sharpened to the point, the pencil tip pushes the actuating element 3 to a position inside the gear ring 1. The paddle 32, based on its deformation, interferes with the rotation of the inner teeth 11 of the gear ring 1, and a sound is emitted between the paddle 32 and the inner teeth 11, thus indicating that the pencil is sharpened to the point. During this process, because the paddle 32 has a certain degree of flexibility and can deform, the paddle 32 will not damage the inner teeth 11 of the gear ring 1, and the sound generated by the interference between the paddle 32 and the inner teeth 11 makes the sharpening indication more obvious.

[0030] To provide a guide for the movement of the actuator 3 and ensure better interference between the actuator 3 and the gear ring 1, the tool holder 2 is provided with a guide rod 22, and the actuator 3 is slidably mounted on the guide rod 22. To further improve the stability of the movement of the actuator 3, at least two guide rods 22 are provided and distributed around the outer periphery of the sharpening hole 21. The actuator 3 is detachably secured to the guide rod 22. Specifically, the actuator 3 may be provided with a hooked groove, through which it is movably mounted on the guide rod 22.

[0031] The pencil sharpening indicator device of this invention features a movable actuator 3 positioned between the sharpening hole 21 and the gear ring 1. During use, the sharpened pencil tip within the sharpening hole 21 presses against the actuator 3 in the direction of the gear ring 1. The interference between the actuator 3 and the gear ring 1 provides a sharpening indication. This device utilizes the inherent gear ring 1 structure of the pencil sharpener, eliminating the need for additional dedicated indicator components. This simplifies the structure, reduces structural factors affecting sharpening accuracy, and resolves potential issues such as jamming during transmission and component lifespan, significantly improving the reliability of the sharpening indication. Furthermore, the pencil tip's movement direction aligns with that of the actuator 3, resulting in more direct transmission between them. The pencil tip exerts only a small force on the actuator 3, further enhancing the sensitivity of the sharpening indication. Furthermore, based on the interference indication relationship between the actuator 3 and the toothed ring 1, the actuator 3 does not need to be specially reset. When the pen tip releases the force on the actuator 3, the actuator 3 naturally releases the interference relationship with the toothed ring 1, which also simplifies the user's operation.

[0032] This utility model also relates to a pencil sharpener, including a housing, a rocker arm 5, a roller cutter 6, and the aforementioned pencil sharpening indicator. A toothed ring 1 is fixed to the housing, and a blade holder 2 is disposed inside the housing and connected to the rocker arm 5. The toothed ring 1 is located on the outer periphery of the area where the blade holder 2 and the rocker arm 5 are connected. The roller cutter 6 is rotatably disposed on the outer side of the blade holder 2 and engages with the toothed ring 1.

[0033] In use, the user inserts the end of the pencil into the sharpening hole 21. The user rotates the rocker arm 5, causing the blade holder 2 to rotate. As the blade holder 2 rotates, the roller 6 rotates with it. Based on its meshing relationship with the gear ring 1, the roller 6 rotates around its own axis to cut the pencil inside the sharpening hole 21. As the pencil is continuously sharpened, the tip moves out of the sharpening hole 21 and presses against the actuating element 3. When the actuating element 3 moves to a position inside the gear ring 1 and interferes with the inner teeth 11 of the gear ring 1, it indicates that the pencil has been sharpened to the point. Correspondingly, driven by the blade holder 2, the actuating element 3 rotates relative to the gear ring 1. The paddle 32 on the actuating element 3 and the inner teeth 11 of the gear ring 1 produce an interference sound based on relative rotation, thus indicating that the pencil has been sharpened to the point. At this time, the user can stop rotating the handle to complete the pencil sharpening work.

[0034] The pencil sharpener using the pencil sharpening reminder device in this embodiment has a very simple structure. It can achieve the reminder that the pencil is sharpened to the point by only adding the action component 3. It has low cost and low failure rate.

[0035] Example 2

[0036] like Figure 3As shown, in this embodiment, in addition to the actuating element 3, a transmission element 4 can also be movably mounted on the blade holder 2. The transmission element 4 is positioned between the sharpening hole 21 and the actuating element 3. However, compared to the actuating element 3 in Embodiment 1, the dimensions of the actuating element 3 and the transmission element 4 in their moving direction can be reduced in this embodiment. This reduces the contact area between the actuating element 3 and the blade holder 2, improves the flexibility of the actuating element 3 in moving on the blade holder 2, and further reduces the probability of the actuating element 3 getting stuck in the blade holder 2. In use, as the pencil is gradually sharpened, the tip pushes out of the sharpening hole 21, and the pencil presses against the actuating element 3, which in turn pushes the actuating element 3 to move into the gear ring 1. Then, the paddle 32 on the actuating element 3 elastically interferes with the inner teeth 11 of the gear ring 1, thus emitting a sound to indicate that the pencil has been sharpened to the point.

[0037] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of the invention. However, the use of these terms is merely for illustrative purposes and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A pencil sharpening reminder device, comprising: The gear ring (1) has a ring of internal teeth (11) on its inner peripheral wall; The knife holder (2) has a pencil sharpening hole (21) formed inside for inserting a pencil; Its features are: Also includes The active component (3) is movably disposed between the outlet end of the pencil sharpening hole (21) and the gear ring (1); The actuating element (3) moves toward the gear ring (1) based on the push of the pen tip extending out of the pen-sharpening hole (21) and interferes circumferentially with the inner teeth (11) of the gear ring (1).

2. The pencil sharpening reminder device according to claim 1, characterized in that: The actuating element (3) is movably mounted on the tool holder (2).

3. The pencil sharpening reminder device according to claim 2, characterized in that: The tool holder (2) is provided with a guide rod (22), and the actuating element (3) is slidably disposed on the guide rod (22).

4. The pencil sharpening reminder device according to claim 3, characterized in that: At least two guide rods (22) are provided and distributed on the outer periphery of the pencil sharpening hole (21).

5. The pencil sharpening reminder device according to any one of claims 2 to 4, characterized in that: The actuating element (3) is detachably mounted on the tool holder (2).

6. The pencil sharpening reminder device according to any one of claims 1 to 4, characterized in that: The actuating element (3) includes a base (31) and a paddle (32) disposed on the base (31). The paddle (32) extends radially along the gear ring (1) and is deformable to emit a beep when it rotates relative to the inner teeth (11) of the rotating gear ring (1).

7. The pencil sharpening reminder device according to claim 6, characterized in that: The tool holder (2) is also movably provided with a transmission component (4), which is located between the pencil sharpening hole (21) and the actuating component (3).

8. A pencil sharpener, comprising a housing and a rocker arm (5), characterized in that: It also includes a pencil sharpening reminder device as described in any one of claims 1 to 7, wherein the toothed ring (1) is fixed to the housing, and the blade holder (2) is disposed inside the housing and connected to the rocker arm (5).

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