Pencil sharpening prompting device and pencil sharpener

Abstract

The utility model relates to a pencil sharpening prompting device which comprises a knife rest which is provided with a pencil sharpening hole and is arranged on a machine shell of a pencil sharpener in a rotating mode. The action ring is annular, is arranged on the shell of the pencil sharpener and is positioned at the pen point extending end of the knife rest, and at least one convex part is arranged on the action ring; and the triggering piece comprises a base body and a deformable shifting piece arranged on the base body, the base body is movably arranged on the knife rest and located between the end of the pencil sharpening hole and the action ring, the triggering piece is pushed by the pencil point to move to the action ring, and the shifting piece and the protruding part interfere with each other relatively to conduct shifting so as to give out a warning tone. The pencil sharpening prompting device is simple in triggering structure and high in reliability, and a user does not need to reset the pencil sharpening prompting device. The utility model further relates to a pencil sharpener which comprises a machine shell, a hob, a rocker arm, a gear ring and a pencil sharpening prompting device, the gear ring is arranged on the machine shell, the hob is arranged on the knife rest in a rotating mode and meshed with the gear ring, and the rocker arm penetrates through the machine shell and is connected with the knife rest. The pencil sharpener is low in cost and low in sharpening prompt 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 that has a simple trigger structure, high reliability, and does not require user reset operation, and realizes pencil sharpening reminder based on interference sound, in contrast to the above-mentioned prior art.

[0005] The second technical problem to be solved by this utility model is to provide a low-cost pencil sharpener with a low failure rate in sharpening prompts, in contrast to the above-mentioned 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 blade holder, with a pencil-sharpening hole formed inside, is rotatably mounted on the casing of the pencil sharpener;

[0008] Its characteristic is that it also includes:

[0009] An actuating ring, which is annular in shape, is disposed on the housing of the pencil sharpener and located at the tip extension end of the blade holder. The actuating ring is provided with at least one protrusion.

[0010] A trigger, comprising a base and a deformable paddle disposed on the base, the base being movably disposed on a tool holder and located between the end of a sharpening hole and an actuating ring, wherein when the trigger moves to the position of the actuating ring based on the push of a pen tip extending from the sharpening hole, the paddle interferes with a protrusion on the actuating ring to produce a prompting sound.

[0011] In order to output the prompt tone at a higher frequency and avoid situations where the user does not hear it clearly, the action ring is provided with multiple protrusions evenly distributed along the circumference.

[0012] Preferably, the working ring is provided with a plurality of protruding teeth as protrusions along the circumferential direction.

[0013] Alternatively, the actuating ring is a gear ring for mounting a hob, and the meshing teeth on the inner peripheral wall of the gear ring serve as the protrusion.

[0014] The paddle extends radially along the toothed ring, and the length of the paddle satisfies the following: the trigger moves into the toothed ring based on the push of the pen tip extending out of the sharpening hole, and the paddle interferes with the meshing teeth circumferentially.

[0015] Alternatively, the actuating ring is a gear ring for mounting a hob, and the protrusion is provided on the inner end face of the gear ring;

[0016] The shape of the paddle satisfies the following: the trigger moves into the gear ring based on the push of the pen tip extending from the pen-sharpening hole, and the paddle is placed in the gear ring and contacts the protrusion on the inner end face of the gear ring, thus interfering circumferentially.

[0017] Alternatively, the actuating ring is disposed near the sharpening hole at one end of the gear ring on which the hob is mounted, and the protrusion is provided on the end face of the actuating ring facing the sharpening hole.

[0018] To ensure the stability of the trigger's movement, the tool holder is provided with a guide rod along the direction of the trigger's movement, and the trigger is slidably mounted on the guide rod.

[0019] Preferably, at least two guide rods are provided and distributed on the outside of the pencil sharpening hole.

[0020] The technical solution adopted by this utility model to solve the second technical problem mentioned above is as follows: a pencil sharpener, including a housing, a roller, a rocker arm, and a gear ring, characterized in that: it also includes the aforementioned pencil sharpening prompt device, the gear ring is fixedly mounted on the housing, the roller is rotatably mounted on the blade holder and meshes with the gear ring, the blade holder is mounted inside the housing, and the rocker arm passes through the housing and is connected to the blade holder.

[0021] Compared with the prior art, the advantages of this utility model are as follows: The pencil sharpening reminder device of this utility model is provided with an action ring and a trigger. When in use, the pencil tip presses against the trigger and contacts the action ring. As the pencil holder rotates, the paddle on the trigger deforms and interferes with the protrusion on the action ring in the circumferential direction, thereby emitting a sound as a reminder that the pencil has been sharpened to a point, thus reminding the user.

[0022] In this pencil sharpening indicator, the sound emitted by the interaction between the actuating ring and the trigger mechanism serves as the prompt, avoiding reliance on structural action. This results in fewer moving parts in the device, reducing structural factors that could affect sharpening completion and resolving potential issues like jamming during transmission and component lifespan, thus significantly improving the reliability of the sharpening completion indicator. Furthermore, the pencil tip moves in the same direction as the trigger mechanism, making the transmission between them more direct. The pencil tip only needs to exert a small force on the trigger mechanism, greatly enhancing the sensitivity of the sharpening prompt. Moreover, based on the interference relationship between the trigger mechanism and the actuating ring, the trigger mechanism does not require dedicated resetting. When the pencil tip releases its force on the trigger mechanism, the trigger mechanism naturally releases its interference with the gear ring, simplifying user operation.

[0023] The pencil sharpener that uses this pencil sharpening reminder device has a very simple structure, occupies little space inside the casing, has low cost, and has a low failure rate in providing sharpening reminders. Attached Figure Description

[0024] Figure 1 This is a perspective view of the first pencil sharpening reminder device in the embodiments of this utility model.

[0025] Figure 2 This is a perspective view of the second type of pencil sharpening reminder device in the embodiments of this utility model.

[0026] Figure 3 for Figure 2 3D exploded view.

[0027] Figure 4 This is a perspective view of the third type of pencil sharpening reminder device in the embodiments of this utility model.

[0028] Figure 5 This is a perspective view of the fourth type of pencil sharpening reminder device in the embodiments of this utility model. Detailed Implementation

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] like Figures 1 to 5As shown, the pencil sharpening reminder device in this embodiment includes a blade holder 1, an action ring 2, and a trigger 3.

[0031] The blade holder 1 is rotatably mounted on the housing of the pencil sharpener. Typically, the blade holder 1 is connected to a drive mechanism and rotates relative to the housing under the drive of the drive mechanism. The drive mechanism can be electric or manual. The blade holder 1 has a pencil-sharpening hole 11 formed inside for inserting a pencil. The pencil-sharpening hole 11 is typically tapered and has a slit on its side. After the pencil is inserted into the pencil-sharpening hole 11, during sharpening, as the blade holder 1 rotates, it cuts the portion of the pencil that protrudes through the slit, thus achieving the pencil-sharpening function.

[0032] The action ring 2 is annular and is disposed on the housing of the pencil sharpener and located at the tip extension end of the blade holder 1. The action ring 2 is provided with at least one protrusion 21.

[0033] The trigger 3 includes a base 31 and a deformable paddle 32 disposed on the base 31. The base 31 is movably disposed on the blade holder 1 and located between the end of the sharpening hole 11 and the actuating ring 2. In this embodiment, the base 31 can move between the end of the sharpening hole 11 and the actuating ring 2, thereby moving away from or closer to the actuating ring 2. When the pencil in the sharpening hole 11 is sharpened, the pencil tip will extend out of the sharpening hole 11 and press against the trigger 3, pushing the trigger 3 to move to the position of the actuating ring 2. At the same time, the sharpening operation is in progress, and the trigger 3 will rotate synchronously with the blade holder 1. The trigger 3 will rotate relative to the actuating ring 2. The paddle 32 on the trigger can interfere with the protrusion 21 on the actuating ring 2 to make a prompt sound. The user obtains the information that the pencil has been sharpened to the point according to the prompt sound, and then stops the sharpening operation.

[0034] To ensure the stability of the movement of the trigger 3, a guide rod 12 is provided on the tool holder 1 along the moving direction of the trigger 3. The base 31 of the trigger 3 is slidably disposed on the guide rod 12. The guide rod 12 extends into the working ring 2 as needed. In this embodiment, at least two guide rods 12 are provided and distributed on the outside of the sharpening hole 11.

[0035] If the actuating ring 2 has a protrusion 21, then when the trigger 3 rotates one revolution, the paddle 32 will trigger the protrusion 21 once, emitting a sound once. Since the frequency of the sound is relatively low, to avoid the user not hearing it clearly, multiple protrusions 21 are evenly arranged circumferentially on the actuating ring 2. This way, when the trigger 3 rotates one revolution, it can emit the same number of sounds as the number of protrusions 21, thereby increasing the frequency of the output prompt sound and making the prompt that the pencil is sharpened to a point clearer. Preferably, multiple protrusions 21 can be continuously arranged circumferentially on the actuating ring 2, thus enabling continuous sound output to indicate that the pencil is sharpened to a point.

[0036] Based on the internal structural characteristics of the pencil sharpener, different structures of the action ring 2 can be adopted. In this embodiment, the following implementation methods of the action ring 2 are provided.

[0037] The first type

[0038] like Figure 1 As shown, a gear ring 100 is typically provided in a pencil sharpener for mounting the roller cutter 200. In this embodiment, the gear ring 100 is used as the working ring 2, and the meshing teeth on the inner circumferential wall of the gear ring 100 serve as the protrusion 21. Correspondingly, the paddle 32 needs to generate circumferential interference with the meshing teeth of the gear ring 100. Therefore, the paddle 32 extends along the radial direction of the gear ring 100. The number of paddles 32 can also be specifically set as needed, such as one, two, or even more. The length of the paddle 32 satisfies the following: the trigger 3 moves into the gear ring 100 based on the push of the pencil tip extending out of the sharpening hole 11, and the paddle 32 interferes with the meshing teeth circumferentially. When the pencil is pulled out of the sharpening hole 11, it will automatically retract from the gear ring 100 based on the deformation capability of the paddle 32 itself.

[0039] The second type

[0040] like Figure 2 and Figure 3 As shown, the working ring 2 is a gear ring 100 for mounting the hob 200. One end of the gear ring 100 away from the tool holder 1 has an annular end face in the radial direction. Thus, a protrusion 21 is provided on the inner end face of the gear ring 100, i.e., a protrusion 21 is provided on the inner surface of the end face of the gear ring 100. Multiple protrusions 21 can be provided and arranged circumferentially along the annular structure of the end face. The shape of the paddle 32 satisfies the following: the trigger 3 moves into the gear ring 100 based on the push of the pen tip extending from the sharpening hole 11; the paddle 32 is placed inside the gear ring 100 and contacts the protrusion 21 on the inner end face of the gear ring 100, interfering circumferentially. That is, the length of the paddle 32 in the radial direction of the gear ring 100 needs to be within the radius of the gear ring 100; the paddle 32 makes interference contact with the protrusion 21 of the gear ring 100 in the axial direction; and as the paddle 32 rotates, the paddle 32 and the protrusion 21 interfere circumferentially, producing sound. After the pencil is sharpened, as the force exerted by the pencil tip on the trigger 3 is released, the lever 32 releases the force exerted on the protrusion 21 based on its own elasticity. Thus, when the pencil is sharpened later, before the pencil is sharpened, the lever 32 will not interfere with the protrusion 21 because the trigger 3 is not under force, and therefore no sound will be emitted.

[0041] The third type

[0042] like Figure 4As shown, the working ring 2 is a gear ring 100 for mounting the hob 200. In order to achieve the meshing connection between the gear ring 100 and the hob 200 set on the tool holder 1, the end of the gear ring 100 facing the tool holder 1 is open. The outer end face of the gear ring 100 near the tool holder 1 is provided with a protrusion 21, that is, the protrusion 21 is set on the end face of the ring wall of the gear ring 100.

[0043] The fourth type

[0044] like Figure 5 As shown, the actuating ring 2 is located near the sharpening hole 11 at one end of the gear ring 100 where the hob 200 is mounted, meaning the actuating ring 2 is independently positioned relative to the gear ring 100. The end face of the actuating ring 2 facing the sharpening hole 11 has a protrusion 21. When the trigger 3 approaches the actuating ring 2 based on the pressure of the pencil tip, the paddle 32 on the trigger 3 interferes with the protrusion 21 on the actuating ring 2, thus producing a sound indicating that the pencil has been sharpened to a point.

[0045] The pencil sharpening reminder device of this utility model is provided with an action ring 2 and a trigger 3. When in use, the pencil tip presses against the trigger 3 and comes into contact with the action ring 2. As the pencil holder 1 rotates, the paddle 32 on the trigger 3 deforms and interferes with the protrusion 21 on the action ring 2 in the circumferential direction, thereby emitting a sound as a reminder that the pencil has been sharpened to a point, so as to remind the user.

[0046] In this pencil sharpening reminder device, the sound emitted by the interaction between the actuating ring 2 and the trigger 3 serves as the reminder information, avoiding the use of structural action as the reminder. Correspondingly, this device has fewer moving parts, reducing structural factors that could affect the sharpening process, thus solving potential jamming and component lifespan issues during transmission, and significantly improving the reliability of the sharpening reminder. Furthermore, the movement direction of the pencil tip is consistent with that of the trigger 3, making the transmission between them more direct. The pencil tip only needs to exert a small force on the trigger 3, greatly improving the sensitivity of the sharpening reminder. Moreover, based on the interference relationship between the trigger 3 and the actuating ring 2, the trigger 3 does not require special resetting. When the pencil tip releases its force on the trigger 3, the trigger 3 naturally releases its interference relationship with the gear ring 100, simplifying the user's operation.

[0047] This utility model also relates to a pencil sharpener, including a housing, a roller 200, a rocker arm 300, a gear ring 100, and the aforementioned pencil sharpening reminder device. The gear ring 100 is fixedly mounted on the housing, the roller 200 is rotatably mounted on the blade holder 1 and meshes with the gear ring 100, the blade holder 1 is mounted inside the housing, and the rocker arm 300 passes through the housing and is connected to the blade holder 1.

[0048] In use, the user inserts the end of the pencil into the sharpening hole 11. The user rotates the rocker arm 300, causing the blade holder 1 to rotate. As the blade holder 1 rotates, the hobbing cutter 200 rotates with it. Based on its meshing relationship with the gear ring 100, the hobbing cutter 200 rotates around its own axis to cut the pencil inside the sharpening hole 11. As the pencil is continuously sharpened, the tip moves out of the sharpening hole 11 and presses against the trigger 3. The trigger 3 moves to the position of the actuating ring 2 and interferes with the protrusion 21 on the actuating ring 2, thus emitting a beep 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 process.

[0049] The pencil sharpener that uses this pencil sharpening reminder device has a very simple structure, occupies little space inside the casing, has low cost, and has a low failure rate in providing sharpening reminders.

[0050] 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 prompting device, comprising a holder (1) internally shaped with a sharpening hole (11) for inserting a pencil, rotatably arranged on a casing of a pencil sharpener; characterized in that further comprising an acting ring (2) in the shape of a ring, arranged on the casing of the pencil sharpener and located at a pencil tip extending end of the holder (1), the acting ring (2) being provided with at least one protrusion (21); a trigger (3) comprising a base (31) and a deformable tab (32) arranged on the base (31), the base (31) being movably arranged on the holder (1) and located between an end of the sharpening hole (11) and the acting ring (2), when the trigger (3) is moved to the position of the acting ring (2) based on the pushing of the pencil tip extending in the sharpening hole (11), the tab (32) interferes with the protrusion (21) on the acting ring (2) to be actuated to emit a prompt sound.

2. The pencil sharpening prompting device of claim 1, wherein: The acting ring (2) is uniformly provided with a plurality of protrusions (21) along the circumferential direction.

3. The pencil sharpening prompting device of claim 2, wherein: The acting ring (2) is continuously provided with a plurality of protrusions (21) in the form of protruding teeth along the circumferential direction.

4. A pencil sharpening prompting device according to any one of claims 1 to 3, characterized in that: The acting ring (2) is a gear ring (100) for mounting a hob (200), the meshing teeth on the inner circumferential wall of the gear ring (100) serving as the protrusions (21); The tab (32) extends in the radial direction of the gear ring (100), and the length of the tab (32) satisfies that when the trigger (3) is moved into the gear ring (100) based on the pushing of the pencil tip extending in the sharpening hole (11), the tab (32) interferes with the meshing teeth in the circumferential direction.

5. A pencil sharpening prompting device according to any one of claims 1 to 3, characterized in that: The acting ring (2) is a gear ring (100) for mounting a hob (200), the protrusions (21) being provided on the inner end face of the gear ring (100); The shape of the tab (32) satisfies that when the trigger (3) is moved into the gear ring (100) based on the pushing of the pencil tip extending in the sharpening hole (11), the tab (32) is placed in the gear ring (100) and contacts the protrusions (21) on the inner end face of the gear ring (100) to interfere in the circumferential direction.

6. A pencil sharpening prompting device according to any one of claims 1 to 3, characterized in that: The acting ring (2) is a gear ring (100) for mounting a hob (200), the protrusions (21) being provided on the outer end face of the gear ring (100) close to one end of the holder (1).

7. A pencil sharpening prompting device according to any one of claims 1 to 3, characterized in that: The acting ring (2) is arranged at one end of the gear ring (100) for mounting the hob (200) close to the sharpening hole (11), and the protrusions (21) are provided on the end face of the acting ring (2) facing one end of the sharpening hole (11).

8. A pencil sharpening prompting device according to any one of claims 1 to 3, characterized in that: The holder (1) is provided with a guide rod (12) arranged in the moving direction of the trigger (3), and the trigger (3) is slidingly arranged on the guide rod (12).

9. A pencil sharpener comprising a housing, a rotary cutter (200), a rocker arm (300), a gear ring (100), characterized in that: Further comprising the pencil sharpening prompting device according to any one of claims 1 to 8, the gear ring (100) is fixedly arranged on the casing, the hob (200) is rotatably arranged on the holder (1) and engaged with the gear ring (100), the holder (1) is arranged in the casing, and the rocker arm (300) is connected with the holder (1) through the casing.

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