A pen advancing and clamping mechanism

Abstract

The application discloses a pencil entering clamping mechanism and belongs to the technical field of electric pencil sharpeners. The pencil entering clamping mechanism comprises a first pencil clamping assembly, a second pencil clamping assembly, a vortex disc and a mounting disc. The mounting disc is arranged above the vortex disc. The mounting disc rotates to drive the first pencil clamping assembly and the second pencil clamping assembly to approach each other to clamp or to move away from each other to expand. The mounting disc is connected with an elastic member. The elastic member applies a reverse rotating force to the mounting disc to drive the first pencil clamping assembly and the second pencil clamping assembly to approach each other. In an initial state, the mounting disc is in contact connection with the vortex disc. The vortex disc rotates to drive the mounting disc in positive rotation, thereby driving the first pencil clamping assembly and the second pencil clamping assembly to expand. After the mounting disc rotates in the positive direction by a predetermined angle, the mounting disc is disconnected from the vortex disc. The mounting disc loses the thrust force of the vortex disc and then rotates in the reverse direction under the action of the elastic member to return to the initial state. The first pencil clamping assembly and the second pencil clamping assembly have an initial expansion state, so that the pencil entering is more labor-saving.

Description

Technical Field

[0001] This application relates to the field of electric pencil sharpener technology, and in particular to a pencil clamping mechanism. Background Technology

[0002] Pencil sharpeners are a popular tool among students. A pencil sharpener consists of an infeed mechanism and a sharpening mechanism. To sharpen a pencil, the pencil is fed through the infeed mechanism and then into the sharpening mechanism. Once the pencil is in place, the infeed mechanism clamps it, and then the sharpening mechanism cuts the pencil tip. After sharpening, the infeed mechanism can eject the pencil from the sharpener.

[0003] Currently, there are various structures for automatic pencil feeding mechanisms, but most of them rely on elastic elements to clamp the pencil. These elements deform elastically to create a clamping force. When a user inserts the pencil into the feeding mechanism, the pencil needs to be inserted between the first and second feeding components. In other words, the user needs to apply force to open the first and second feeding components so that the pencil can be smoothly inserted and clamped. However, when the pencil diameter is large, the resistance from the elastic elements that the user needs to overcome is also greater, making it more difficult to feed and retract the pencil, resulting in a poor user experience.

[0004] Related prior art, such as Chinese patent application "Pencil Sharpener Feeding Mechanism and Pencil Sharpener Having the Feeding Mechanism", application number: CN202211066871.4, discloses a mechanism including: a top cover; a first pen clamping assembly; a second pen clamping assembly movable between a released position and a clamping position relative to the first pen clamping assembly; one or more first elastic members having an elastic tendency to position the first and second pen clamping assemblies in the released position; a connecting member having an inner annular guide surface on its inner wall, and the connecting member movable between the first and second positions, wherein the first and second pen clamping assemblies abut against the inner annular guide surface by the elastic force of the first elastic members. The aforementioned patent application provides a pencil sharpener feeding mechanism in which the first elastic members allow the first and second pen clamping assemblies to be in a released state in the initial position, making pencil feeding easier, and by adding a connecting member to move the first and second pen clamping assemblies to the clamping position, it prevents the pencil from spinning freely between the pencil and the sharpener during sharpening.

[0005] The aforementioned Chinese patent application addresses the problem of excessive resistance when inserting a pencil. However, it requires switching the position of the connecting parts to change the orientation of the first and second pencil clamping components, allowing them to be in either a released or clamped position. This application presents a novel pencil-feeding clamping mechanism with a simpler overall structure, making it well-suited for use in existing pencil sharpeners. Summary of the Invention

[0006] The technical problem to be solved by this application is to provide a pencil clamping mechanism, wherein the first pencil clamping component and the second pencil clamping component are in an initial expanded state, so that the pencil is fed in with less effort.

[0007] The technical solution adopted in this application is: a pen clamping mechanism, including a first pen clamping assembly, a second pen clamping assembly, a scroll plate and a mounting plate. The mounting plate is mounted on the scroll plate. The first pen clamping assembly and the second pen clamping assembly are respectively connected to the mounting plate. The rotation of the mounting plate drives the first pen clamping assembly and the second pen clamping assembly to move closer to each other to clamp or move away from each other to expand. The mounting plate is connected to an elastic element, which applies a force to the mounting plate to rotate in the opposite direction, thereby driving the first pen clamping assembly and the second pen clamping assembly to move closer to each other. In the initial state, the mounting plate is in contact with the scroll plate. When the scroll plate rotates, it causes the mounting plate in contact with it to rotate in the forward direction, thereby causing the first pen clamping assembly and the second pen clamping assembly to expand. After the mounting plate rotates in the forward direction by a predetermined angle, it disengages from the scroll plate and loses the thrust of the scroll plate. Then, under the action of the elastic element, it rotates in the opposite direction to return to the initial state.

[0008] Compared with the prior art, the advantages of this application are as follows: First, a mounting plate structure is provided, with the first and second pen-clamping components respectively connected to the mounting plate. The rotation of the mounting plate causes the first and second pen-clamping components to move closer together to clamp or move further apart to expand. In this application, the mounting plate plays the role of driving the first and second pen-clamping components to move synchronously. Second, in this application, the mounting plate is subjected to two forces applied to it by two structures. One is the force exerted by the elastic element on the mounting plate to rotate in the opposite direction, which is the normal force. The other is the force exerted by the rotation of the scroll plate on the mounting plate to push it to rotate in the forward direction when the mounting plate is in contact with the scroll plate. This application further sets that in the initial state, the mounting plate and the scroll plate are in contact. After the mounting plate rotates forward by a predetermined angle, the mounting plate will disengage from the scroll plate and will not be subjected to the thrust of the scroll plate but only to the normal force of the elastic element. Then the scroll plate will rotate back (reverse rotation) to return to the initial state. This is a repetitive process. That is, when no pencil is inserted, the first and second pencil clamping components of this application continuously repeat the opening and closing motion. Therefore, even if the pencil has a large diameter, it can be easily inserted when the first and second clamping components are in the expanded state. If the first and second clamping components are in the closed state when the pencil is inserted, the user only needs to wait briefly for them to expand before insertion. In this application, the cycle of the mounting plate is relatively short, ensuring smooth pencil insertion without prolonged obstruction. This design improves the efficiency of pencil insertion and withdrawal and greatly enhances the user experience, making the sharpening process smoother and more convenient. Furthermore, this application uses a scroll mechanism to drive the mounting plate's rotation, directly utilizing the power drive of the original pencil sharpener without requiring an additional power unit. This allows for simple integration into pencil sharpeners without significant modifications to the original structure, reducing product manufacturing costs.

[0009] In summary, the pencil-feeding mechanism provided in this application not only solves the problem of difficulty in feeding and retracting the pencil when using a pencil sharpener in the prior art, but also improves the overall performance and user experience of the pencil sharpener through innovative structural design, and has high practical value and market application prospects.

[0010] In this application, the terms "forward rotation" and "reverse rotation" of the mounting disc are simply used to indicate that the rotation directions are opposite. Forward rotation and reverse rotation do not have a specific direction of rotation.

[0011] In some embodiments of this application, the mounting plate is provided with a vertically arranged slide groove, and a push rod is connected in the slide groove by a linear spring. The linear spring applies a downward thrust to the push rod, and the push rod contacts the surface of the scroll plate under the action of the linear spring.

[0012] In this application, the push rod can only move up and down relative to the mounting plate, so the scroll plate can drive the mounting plate to rotate by pushing the push rod. The push rod is kept in a downward-extending state under the action of the linear spring.

[0013] In some embodiments of this application, the vortex is connected to a power device, which drives the vortex to rotate. The surface of the vortex is provided with push blocks corresponding to push rods. The rotation of the vortex drives the push blocks to rotate, and the rotating push blocks contacting the push rods push the mounting plate to rotate through the push rods.

[0014] Traditional scroll plate structures are simple disc-shaped structures that cannot directly drive the rotation of the mounting plate. This application adds push blocks to the scroll plate, and through the cooperation of the push blocks and push rods, the rotation of the scroll plate drives the rotation of the mounting plate. To further shorten the cycle of the mounting plate's cyclic motion, this application can arrange multiple push blocks at intervals on the scroll plate.

[0015] In some embodiments of this application, the application further includes a mounting base, the mounting plate is mounted on the mounting base, the push rod passes through the mounting base along the inner wall surface of the mounting base and contacts the scroll plate, the inner wall surface of the mounting base is provided with a limiting groove, the limiting groove is provided with a flared guide channel and a constricted guide channel, and the push rod is provided with a locking protrusion that is embedded in the limiting groove.

[0016] In this application, by setting a limiting groove, the locking protrusion on the push rod is embedded into the limiting groove, thereby limiting the movement trajectory of the push rod, and thus limiting the movement trajectory of the mounting plate.

[0017] In some embodiments of this application, the flared guide channel is an inclined channel. When the mounting plate rotates forward, it drives the locking protrusion to move along the flared guide channel. The locking protrusion moving in the flared guide channel is pushed by the flared guide channel, causing the push rod to move upward and gradually move away from the scroll plate. When the cam moves to the end of the flaring guide channel, the push rod disengages from the push block, and the mounting plate is not pushed by the scroll plate. At this time, the mounting plate is only subjected to the force of the elastic element. The mounting plate rotates in the opposite direction, causing the cam to enter the closing guide channel. Under the action of the elastic element, the cam passes through the closing guide channel. The closing guide channel is a horizontally set channel. When the cam is located in the closing guide channel, the push rod remains in a state of not contacting the push block. After the cam passes through the guide channel, the push rod moves downward under the action of the linear spring until it contacts and connects with the scroll plate.

[0018] By combining the forward rotation of the mounting plate with the movement of the locking protrusion, a pre-expansion function of the pencil clamping mechanism is achieved through a simple mechanical structure. This allows users to insert pencils more smoothly and without resistance, and also makes the device operate more smoothly, reducing mechanical friction and wear. This design can quickly respond to user operations, ensuring that the push rod can quickly adjust its position when the pencil is inserted or removed, improving the user experience. The simple channel design reduces the need for complex mechanical structures, lowers manufacturing and maintenance costs, and makes the product more competitive in the market. Due to its relatively simple structure, it is easier for users to maintain and troubleshoot in daily use, lowering the technical threshold for operation.

[0019] In some embodiments of this application, the mounting plate has two symmetrically arranged guide grooves, and both the first pen clamping assembly and the second pen clamping assembly are provided with protruding posts. The protruding posts on the first pen clamping assembly and the second pen clamping assembly extend into the corresponding guide grooves respectively. When the mounting plate is rotated, the protruding posts on the first pen clamping assembly and the second pen clamping assembly slide along their respective guide grooves.

[0020] In this application, the mounting plate, the first pen clamping assembly, and the second pen clamping assembly are a linked structure. The rotation of the mounting plate will cause the first pen clamping assembly and the second pen clamping assembly to move away from each other and closer to each other. At the same time, the opening or retraction of the first pen clamping assembly and the second pen clamping assembly will also cause the mounting plate to rotate.

[0021] The guide groove design effectively guides the movement of the first and second pen-clamping assemblies, ensuring they move along a predetermined trajectory during rotation and reducing deviations and jamming. Furthermore, the guide groove design on the mounting plate enables synchronous movement of the first and second pen-clamping assemblies.

[0022] In some embodiments of this application, when a pencil is inserted between the first and second pencil clamping assemblies, the first and second pencil clamping assemblies are held open by the force of the pencil. At this time, the mounting plate is subjected to the force applied by the first and second pencil clamping assemblies and the force applied by the elastic element, maintaining the mounting plate in a balanced state.

[0023] When the pencil is not inserted into the first or second pencil clamping assembly, the locking protrusion circulates within the limiting groove. When the pencil is inserted and opens the first and second pencil clamping assemblies, the pencil restricts the reverse rotation of the mounting plate. The locking protrusion then enters the guide channel and moves a certain distance before stopping its circulatory motion. The distance the locking protrusion moves within the guide channel depends on the diameter of the inserted pencil. That is, if the pencil diameter is large, the distance the mounting plate rotates (reversely) is shorter, and the first and second pencil clamping assemblies open wider; if the inserted pencil diameter is small, the distance the mounting plate rotates (reversely) is longer, and the first and second pencil clamping assemblies open less. In other words, after the pencil is inserted into the first and second pencil clamping assemblies, the mounting plate, push rod, and locking protrusion will remain stationary and will not return to their initial positions until the pencil is removed. At this time, the force used by the first and second pencil clamping assemblies to hold the pencil comes from the elastic element.

[0024] In some embodiments of this application, the push block includes a side push surface that contacts the push rod. When the push rod contacts the side push surface of the push block, it can be pushed by a rotating scroll. When the push rod moves upward and disengages from the side push surface of the push block, the mounting plate loses the thrust of the scroll. The top surface of the push block is composed of two inclined surfaces, and the top surface of the push block has an inverted V-shaped structure. The bottom surface of the push rod is an inclined surface.

[0025] When the push rod moves upward and disengages from the side push surface of the push block, the design of the top surface structure of the push block and the bottom surface structure of the push rod allow the mounting plate to quickly lose the thrust of the scroll plate. Then, the pencil clamping assembly adaptively adjusts its clamping position according to the pencil's diameter. The inclined surface design of the push block reduces wear during movement, extends the device's lifespan, and maintains stable performance, especially after prolonged use.

[0026] In some embodiments of this application, the limiting groove is provided with two protruding ridges, referred to as the upper protruding ridge and the lower protruding ridge. The upper and lower protruding ridges form a flared guide channel, and the upper part of the upper protruding ridge forms a constricting guide channel. The lower protruding ridge is inclined, and the latch on the push rod is kept in contact with the lower protruding ridge under the action of a linear spring. The lower protruding ridge pushes the push rod to move upward. The upper protruding ridge is horizontally arranged and one end is bent downward to form a guide section. The latch passing through the flared guide channel enters the constricting guide channel along the guide section. The latch on the push rod is kept in contact with the upper protruding ridge under the action of a linear spring. The upper protruding ridge keeps the push rod in a state of non-contact with the push block.

[0027] The design of the upper and lower raised ridges easily forms flared and constricted guide channels, effectively guiding the movement of the push rod and ensuring it maintains the correct trajectory during pen advance and retraction, minimizing deviation. The tilted design of the lower raised ridge allows adjustment of the mounting plate's forward rotation angle according to actual needs, thereby adjusting the opening distance of the first and second pen clamping components. The guide section of the upper raised ridge provides excellent stability for the locking mechanism, effectively preventing the push rod from jamming or deviating during movement, ensuring the reliability and durability of the equipment. The limiting groove structure design of this application reduces reliance on complex mechanical structures, achieving efficient push rod movement using simple raised ridges and guide channels, thus lowering manufacturing and maintenance costs.

[0028] In some embodiments of this application, the mounting base is provided with mounting grooves for the shafts of the first pen clamping assembly and the second pen clamping assembly to be inserted. The top of the mounting base is provided with a circular ring and a limiting post. The mounting plate is sleeved on the outside of the circular ring and rotates around the circular ring. The surface of the mounting plate is provided with an arc-shaped groove, through which the limiting post passes. The elastic element is a hoop, with one end of the hoop connected to the limiting post and the other end of the hoop connected to the mounting plate.

[0029] In this application, the mounting plate, mounted on the mounting base, forms a mounting space that accommodates the first pen clamping assembly and the second pen clamping assembly. The annular component and the limiting post on the mounting base effectively limit the stability of the mounting plate's movement, ensuring that the mounting plate can move along a predetermined trajectory.

[0030] Based on common knowledge in the field, the above-described embodiments can be combined arbitrarily. Attached Figure Description

[0031] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0032] Figure 1 This is a schematic diagram of the structure of this application; Figure 2 This is a schematic diagram of the breakdown structure of this application. Figure 1 ; Figure 3 This is a schematic diagram of the breakdown structure of this application. Figure 2 ; Figure 4 This is a schematic diagram of the structure of this application without the mounting base installed; Figure 5 This is a schematic diagram of the mounting base in this application.

[0033] The specific explanations of the reference numerals in the attached drawings are as follows: 1. First pen clamping assembly; 2. Second pen clamping assembly; 3. Scroll plate; 4. Mounting plate; 5. Elastic element; 6. Push rod; 7. Slide groove; 8. Push block; 8a. Side push surface; 9. Mounting base; 10. Limiting groove; 11. Flared guide channel; 12. Constricting guide channel; 13. Clip protrusion; 14. Circular ring; 15. Limiting post; 16. Linear spring; 17. Guide groove; 18. Protruding post; 19. Upper protruding ridge; 20. Lower protruding ridge; 21. Arc-shaped groove. Detailed Implementation

[0034] The present application will now be described in detail with reference to the accompanying drawings.

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0036] A pen-feeding clamping mechanism, as described in Embodiment 1 Figures 1 to 4 As shown: It includes a first pen clamping assembly 1, a second pen clamping assembly 2, a volute 3, and a mounting plate 4. The mounting plate 4 is mounted above the volute 3. The first pen clamping assembly 1 and the second pen clamping assembly 2 are respectively connected to the mounting plate 4. The rotation of the mounting plate 4 drives the first pen clamping assembly 1 and the second pen clamping assembly 2 to move closer to each other and clamp together or move further apart and expand. In this application, the mounting plate 4 plays the role of driving the first pen clamping assembly 1 and the second pen clamping assembly 2 to move synchronously.

[0037] The mounting plate 4 is connected to the elastic element 5. The elastic element 5 applies a force to the mounting plate 4 to rotate in the opposite direction, thereby driving the first pen clamping assembly 1 and the second pen clamping assembly 2 to move closer to each other. In the initial state, the mounting plate 4 is in contact with the scroll plate 3. The rotation of the scroll plate 3 causes the mounting plate 4 to rotate forward, thereby expanding the first pen clamping assembly 1 and the second pen clamping assembly 2. This application uses a scroll plate 3 to drive the rotation of the mounting plate 4, which directly utilizes the power drive of the original pencil sharpener without requiring an additional power device. This allows for simple application within pencil sharpeners without significant modifications to the original pencil sharpener structure, reducing product manufacturing costs. After rotating forward by a predetermined angle, the mounting plate 4 disengages from the scroll plate 3, losing the thrust of the scroll plate 3. Then, under the action of the elastic element 5, it rotates in the opposite direction to return to its initial state. The mounting plate 4 is subjected to two forces: one is the force exerted by the elastic element 5 to rotate the mounting plate 4 in the opposite direction, which is the normal force; the other is the force exerted by the rotation of the scroll plate 3 when the mounting plate 4 is in contact with the scroll plate 3, pushing the mounting plate 4 to rotate forward.

[0038] In this application, the mounting disc 4 and the scroll plate 3 are initially connected. After the mounting disc 4 rotates forward by a predetermined angle, it disengages from the scroll plate 3, becoming unaffected by the thrust of the scroll plate 3 and only subjected to the normal force of the elastic element 5. Then, the scroll plate 3 rotates back to its initial state. This is a cyclical process, meaning that the first and second pen-clamping components 1 and 2 continuously repeat the opening and closing motion when no pencil is inserted. Therefore, even with a large pencil diameter, the user can easily insert the pencil when the first and second pen-clamping components 1 and 2 are in an expanded state. If the first and second pen-clamping components 1 and 2 are in a closed state when the pencil is inserted, the user only needs to wait briefly for them to expand before inserting the pencil smoothly. In this application, the cyclical period of the mounting disc 4 is relatively short, ensuring smooth pencil insertion without prolonged obstruction. This design improves the efficiency of pencil movement and greatly enhances the user experience, making the pencil sharpening process smoother and more convenient.

[0039] In summary, the pencil-feeding mechanism provided in this application not only solves the problem of difficulty in feeding and retracting the pencil when using a pencil sharpener in the prior art, but also improves the overall performance and user experience of the pencil sharpener through innovative structural design, and has high practical value and market application prospects.

[0040] In this application, the forward and reverse rotation of the mounting disk 4 are simply to express that the rotation directions are opposite. Forward and reverse rotation do not have a specific direction of rotation.

[0041] Example 2, as Figures 2 to 4 As shown, the mounting plate 4 is provided with a vertically arranged sliding groove 7. A push rod 6 is connected to the sliding groove 7 via a linear spring 16. The linear spring 16 applies a downward pushing force to the push rod 6, and the push rod 6 contacts the surface of the scroll plate 3 under the action of the linear spring 16. In this application, the push rod 6 can only move up and down relative to the mounting plate 4, so the scroll plate 3 can drive the mounting plate 4 to rotate by pushing the push rod 6. The push rod 6 is kept in a downwardly extended state under the action of the linear spring 16.

[0042] The scroll plate 3 is connected to a power unit, which drives the scroll plate 3 to rotate. The surface of the scroll plate 3 is provided with push blocks 8 corresponding to push rods 6. The rotation of the scroll plate 3 drives the push blocks 8 to rotate, and the rotating push blocks 8, in contact with the push rods 6, push the mounting plate 4 to rotate via the push rods 6. Traditional scroll plate 3 structures are simple disc-shaped structures and cannot directly drive the rotation of the mounting plate 4. This application adds push blocks 8 to the scroll plate 3, and through the cooperation of the push blocks 8 and push rods 6, the rotation of the scroll plate 3 drives the rotation of the mounting plate 4. To further shorten the cycle of the mounting plate 4's cyclic motion, this application can provide multiple push blocks 8 spaced apart on the scroll plate 3.

[0043] The push block 8 includes a side push surface 8a that contacts the push rod 6. When the push rod 6 contacts the side push surface 8a of the push block 8, it can be pushed by the rotating scroll 3. When the push rod 6 moves upward and disengages from the side push surface 8a of the push block 8, the mounting plate 4 loses the thrust of the scroll 3. The top surface of the push block 8 is composed of two inclined surfaces. The top surface of the push block 8 has an inverted V-shaped structure, and the bottom surface of the push rod 6 is an inclined surface.

[0044] When push rod 6 moves upward and disengages from the side push surface 8a of push block 8, the design of the top surface structure of push block 8 and the bottom surface structure of push rod 6 allows mounting plate 4 to quickly lose the thrust of scroll plate 3. Then, the pencil clamping assembly adaptively adjusts its clamping according to the pencil's diameter. The inclined surface design of push block 8 reduces wear during movement, extends the device's lifespan, and maintains stable performance, especially after prolonged use.

[0045] The mounting plate 4 has two symmetrically arranged guide grooves 17. Both the first pen clamping assembly 1 and the second pen clamping assembly 2 have protrusions 18, which extend into their respective guide grooves 17. When the mounting plate 4 rotates, the protrusions 18 on the first pen clamping assembly 1 and the second pen clamping assembly 2 slide along their respective guide grooves 17. In this application, the mounting plate 4, the first pen clamping assembly 1, and the second pen clamping assembly 2 form a linked structure. Rotation of the mounting plate 4 causes the first pen clamping assembly 1 and the second pen clamping assembly 2 to move further apart and closer together. Simultaneously, the opening or retraction of the first pen clamping assembly 1 and the second pen clamping assembly 2 also causes the mounting plate 4 to rotate.

[0046] When a pencil is inserted between the first pencil clamp assembly 1 and the second pencil clamp assembly 2, the first pencil clamp assembly 1 and the second pencil clamp assembly 2 are held open by the force of the pencil. At this time, the mounting plate 4 is subjected to the force applied by the first pencil clamp assembly 1 and the second pencil clamp assembly 2, as well as the force applied by the elastic element 5, which maintains the mounting plate 4 in a balanced state.

[0047] When the pencil is not inserted into the first pen clamp assembly 1 or the second pen clamp assembly 2, the locking protrusion 13 circulates within the limiting groove 10. When the pencil is inserted and opens the first pen clamp assembly 1 and the second pen clamp assembly 2, the pencil restricts the reverse rotation of the mounting plate 4. The locking protrusion 13 then enters the converging guide channel 12 and moves a certain distance before stopping its circulating motion. The distance the locking protrusion 13 moves within the converging guide channel 12 depends on the diameter of the inserted pencil. That is, if the pencil diameter is large, the distance the mounting plate 4 rotates (reversely) will be shorter, and the first pen clamp assembly 1 and the second pen clamp assembly 2 will open wider; if the inserted pencil diameter is small, the distance the mounting plate 4 rotates (reversely) will be longer, and the first pen clamp assembly 1 and the second pen clamp assembly 2 will open less. In other words, after the pencil is inserted into the first pen clamp assembly 1 and the second pen clamp assembly 2, the mounting plate 4, the push rod 6, and the locking protrusion 13 will remain stationary and will not return to their initial positions until the pencil is removed. At this time, the force used by the first pen clamp assembly 1 and the second pen clamp assembly 2 to hold the pencil comes from the elastic element 5.

[0048] The rest of the contents of Example 2 are the same as those of Example 1.

[0049] Example 3, as Figures 2 to 5 As shown, this application also includes a mounting base 9, on which the mounting plate 4 is mounted. The push rod 6 passes through the mounting base 9 along its inner wall and contacts the scroll plate 3. A limiting groove 10 is provided on the inner wall of the mounting base 9. The limiting groove 10 contains a flared guide channel 11 and a constricted guide channel 12. A locking protrusion 13 is provided on the push rod 6, which is embedded in the limiting groove 10. In this application, by providing the limiting groove 10, the locking protrusion 13 on the push rod 6 is embedded in the limiting groove 10, thereby restricting the movement trajectory of the push rod 6, and thus restricting the movement trajectory of the mounting plate 4.

[0050] The flared guide channel 11 is an inclined channel. When the mounting plate 4 rotates forward, it drives the locking protrusion 13 to move along the flared guide channel 11. The locking protrusion 13 moving in the flared guide channel 11 is pushed by the flared guide channel 11, causing the push rod 6 to move upward and gradually move away from the scroll plate 3. When the locking protrusion 13 moves to the end of the flared guide channel 11, the push rod 6 disengages from the push block 8. The mounting plate 4 is no longer pushed by the scroll plate 3. At this time, the mounting plate 4 is only subjected to the force of the elastic element 5. The mounting plate 4 rotates in the opposite direction, driving the locking protrusion 13 into the converging guide channel 12. Under the action of the elastic element 5, the locking protrusion 13 passes through the converging guide channel 12. The converging guide channel 12 is a horizontal channel. When the locking protrusion 13 is located in the converging guide channel 12, the push rod 6 remains in a state of not contacting the push block 8. After the locking protrusion 13 passes through the converging guide channel 12, the push rod 6 moves downward under the action of the linear spring 16 until it contacts and connects with the scroll plate 3.

[0051] By combining the forward rotation of the mounting plate 4 with the movement of the locking protrusion 13, a pre-expansion function of the pencil clamping mechanism is achieved through a simple mechanical structure. This allows users to insert pencils more smoothly and without resistance, and also makes the device operate more smoothly, reducing mechanical friction and wear. This design can quickly respond to user operations, ensuring that the push rod 6 can quickly adjust its position when the pencil is inserted or removed, improving the user experience. The simple channel design reduces the need for complex mechanical structures, lowers manufacturing and maintenance costs, and makes the product more competitive in the market. Due to its relatively simple structure, users can more easily perform maintenance and troubleshooting in daily use, lowering the technical threshold for operation.

[0052] The limiting groove 10 is provided with two protruding ridges, designated as upper protruding ridge 19 and lower protruding ridge 20. The upper protruding ridge 19 and lower protruding ridge 20 form a flared guide channel 11, and the upper part of the upper protruding ridge 19 forms a constricting guide channel 12. The lower protruding ridge 20 is inclined, and the locking protrusion 13 on the push rod 6 is kept in contact with the lower protruding ridge 20 under the action of the linear spring 16. The lower protruding ridge 20 pushes the push rod 6 to move upward. The upper protruding ridge 19 is horizontally set and one end is bent downward to form a guide section. The locking protrusion 13 passing through the flared guide channel 11 enters the constricting guide channel 12 along the guide section. The locking protrusion 13 on the push rod 6 is kept in contact with the upper protruding ridge 19 under the action of the linear spring 16. The upper protruding ridge 19 keeps the push rod 6 in a state of non-contact with the push block 8.

[0053] The design of the upper and lower convex ridges easily forms the flared guide channel 11 and the constricted guide channel 12, effectively guiding the movement of the push rod 6 and ensuring that it maintains the correct trajectory during pen advance and retraction, reducing deviation. The inclined setting of the lower convex ridge 20 allows adjustment of the forward rotation angle of the mounting plate 4 according to actual needs, thereby adjusting the opening distance of the first pen clamping assembly 1 and the second pen clamping assembly 2. The guide section of the upper convex ridge 19 provides good stability for the locking convex ridge 13, effectively preventing the push rod 6 from jamming or deviating during movement, ensuring the reliability and durability of the equipment. The design of the limiting groove 10 structure in this application reduces reliance on complex mechanical structures, achieving efficient movement of the push rod 6 using simple convex ridges and guide channels, thus reducing manufacturing and maintenance costs.

[0054] The mounting base 9 is provided with mounting grooves for the shafts of the first pen clamping assembly 1 and the second pen clamping assembly 2 to be inserted. The top of the mounting base 9 is provided with a ring 14 and a limiting post 15. The mounting plate 4 is sleeved on the ring 14 and rotates around the ring 14. The surface of the mounting plate 4 is provided with an arc-shaped groove 21. The limiting post 15 passes through the arc-shaped groove 21. The elastic member 5 is a hoop. One end of the hoop is connected to the limiting post 15, and the other end of the hoop is connected to the mounting plate 4.

[0055] In this application, the mounting plate 4 is mounted on the mounting base 9, forming a mounting space that accommodates the first pen clamping assembly 1 and the second pen clamping assembly 2. The annular component 14 and the limiting post 15 on the mounting base 9 can effectively limit the stability of the movement of the mounting plate 4, ensuring that the mounting plate 4 can move along a predetermined movement trajectory.

[0056] The other contents of Example 3 are the same as those of Example 1 or Example 2.

[0057] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A pen-feeding clamping mechanism, characterized in that, It includes a first pen clamping assembly (1), a second pen clamping assembly (2), a vortex plate (3), a mounting plate (4), and a mounting base (9). The mounting plate (4) is mounted above the vortex plate (3). The first pen clamping assembly (1) and the second pen clamping assembly (2) are respectively connected to the mounting plate (4). The rotation of the mounting plate (4) drives the first pen clamping assembly (1) and the second pen clamping assembly (2) to move closer to each other and clamp together or move further away from each other and expand. The mounting plate (4) is connected to the elastic element (5), and the elastic element (5) applies a force to the mounting plate (4) to rotate in the opposite direction, thereby driving the first pen clamp assembly (1) and the second pen clamp assembly (2) to move closer to each other; In the initial state, the mounting plate (4) is in contact with the scroll plate (3). When the scroll plate (3) rotates, it causes the mounting plate (4) in contact with it to rotate in the forward direction, thereby causing the first pen clamping assembly (1) and the second pen clamping assembly (2) to expand. After the mounting plate (4) rotates in the forward direction by a predetermined angle, it disengages from the scroll plate (3). The mounting plate (4) loses the thrust of the scroll plate (3) and then rotates in the reverse direction under the action of the elastic element (5) to return to the initial state. The mounting plate (4) is provided with a vertically arranged sliding groove (7). A push rod (6) is connected in the sliding groove (7) by a linear spring (16). The linear spring (16) applies a downward pushing force to the push rod (6). The push rod (6) contacts the surface of the scroll plate (3) under the action of the linear spring (16). The mounting plate (4) is mounted on the mounting base (9). The push rod (6) passes through the mounting base (9) along the inner wall surface of the mounting base (9) and contacts the scroll plate (3). The inner wall surface of the mounting base (9) is provided with a limiting groove (10). The limiting groove (10) is provided with a flared guide channel (11) and a constricted guide channel (12). The push rod (6) is provided with a locking protrusion (13), which is embedded in the limiting groove (10). The vortex (3) is connected to a power device. The power device drives the vortex (3) to rotate. The surface of the vortex (3) is provided with push blocks (8) corresponding to the push rod (6). The rotation of the vortex (3) drives the push blocks (8) to rotate. When the rotating push blocks (8) come into contact with the push rod (6), the push rod (6) pushes the mounting plate (4) to rotate. The limiting groove (10) is provided with two protruding ridges, referred to as the upper protruding ridge (19) and the lower protruding ridge (20). The upper protruding ridge (19) and the lower protruding ridge (20) form a flared guide channel (11), and the upper part of the upper protruding ridge (19) forms a constricting guide channel (12). The lower protruding ridge (20) is inclined. The locking protrusion (13) on the push rod (6) is kept in contact with the lower protruding ridge (20) under the action of the linear spring (16). The lower protruding ridge (20) pushes the push rod (6) to move upward. The upper protruding ridge (19) is horizontally set and one end is bent downward to form a guide section. The locking protrusion (13) passing through the flared guide channel (11) enters the constricting guide channel (12) along the guide section. The locking protrusion (13) on the push rod (6) is kept in contact with the upper protruding ridge (19) under the action of the linear spring (16). The upper protruding ridge (19) makes the push rod (6) not in contact with the push block (8).

2. The pen-feeding clamping mechanism according to claim 1, characterized in that, The flared guide channel (11) is an inclined channel. When the mounting plate (4) rotates in the forward direction, it drives the cam (13) to move along the flared guide channel (11). The cam (13) moving in the flared guide channel (11) is pushed by the flared guide channel (11), causing the push rod (6) to move upward and gradually move away from the vortex plate (3). When the cam (13) moves to the end of the flared guide channel (11), the push rod (6) disengages from the push block (8), and the mounting plate (4) is not pushed by the scroll plate (3). At this time, the mounting plate (4) is only subjected to the force of the elastic element (5). The mounting plate (4) rotates in the opposite direction, driving the cam (13) into the constricting guide channel (12). Under the action of the elastic element (5), the cam (13) passes through the constricting guide channel (12). The constricting guide channel (12) is a horizontally set channel. When the cam (13) is located in the constricting guide channel (12), the push rod (6) remains in a state of not contacting the push block (8). After the card protrusion (13) passes through the constriction guide channel (12), the push rod (6) moves downward under the action of the linear spring (16) until it contacts and connects with the scroll plate (3).

3. The pen-feeding clamping mechanism according to claim 2, characterized in that, The mounting plate (4) has two symmetrically arranged guide grooves (17). The first pen clamping assembly (1) and the second pen clamping assembly (2) are both provided with protrusions (18). The protrusions (18) on the first pen clamping assembly (1) and the protrusions (18) on the second pen clamping assembly (2) extend into the corresponding guide grooves (17). When the mounting plate (4) is rotated, the protrusions (18) on the first pen clamping assembly (1) and the protrusions (18) on the second pen clamping assembly (2) slide along the guide grooves (17) where they are located.

4. The pen-feeding clamping mechanism according to claim 3, characterized in that, When a pencil is inserted between the first pencil clamp assembly (1) and the second pencil clamp assembly (2), the first pencil clamp assembly (1) and the second pencil clamp assembly (2) are held open by the force of the pencil. At this time, the mounting plate (4) is subjected to the force applied by the first pencil clamp assembly (1) and the second pencil clamp assembly (2), as well as the force applied by the elastic element (5), which keeps the mounting plate (4) in a balanced state.

5. The pen-feeding clamping mechanism according to claim 1, characterized in that, The push block (8) includes a side push surface (8a) that contacts the push rod (6). When the push rod (6) contacts the side push surface (8a) of the push block (8), it can be pushed by the rotating volute (3). When the push rod (6) moves upward and disengages from the side push surface (8a) of the push block (8), the mounting plate (4) loses the thrust of the volute (3). The top surface of the push block (8) is composed of two inclined surfaces. The top surface of the push block (8) has an inverted V-shaped structure. The bottom surface of the push rod (6) is an inclined surface.

6. The pen-feeding clamping mechanism according to claim 1, characterized in that, The mounting base (9) is provided with mounting grooves for inserting the shaft of the first pen clamping assembly (1) and the shaft of the second pen clamping assembly (2). The top of the mounting base (9) is provided with a ring (14) and a limiting post (15). The mounting plate (4) is sleeved on the ring (14) and rotates around the ring (14). The surface of the mounting plate (4) is provided with an arc-shaped groove (21). The limiting post (15) passes through the arc-shaped groove (21). The elastic member (5) is a hoop. One end of the hoop is connected to the limiting post (15), and the other end of the hoop is connected to the mounting plate (4).

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