Blackboard eraser
The design of the motor-driven eccentric wheel sliding scraper and extension component solves the problems of dust flying when cleaning with the blackboard eraser and students erasing the blackboard at high places, achieving the effect of cleaning and adaptive use.
Patent Information
- Application Number
- CN202422679615.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-04
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-11-04
AI Technical Summary
Existing blackboard erasers generate dust during cleaning, causing environmental pollution and health hazards, and students who are short of height cannot erase high blackboards.
An electric motor drives the eccentric wheel to drive the sliding connecting frame and scraper to clean the dust. The blackboard eraser length can be adjusted to suit different heights through the gear rack structure combined with the extension component.
It effectively prevents dust from flying, keeps the environment clean, adapts to the erasing needs of students of different heights, and improves the convenience of use.
Smart Images
Figure CN223478636U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of teaching aids technology, and in particular to a blackboard eraser. Background Art
[0002] A blackboard is a flat surface that can be written on repeatedly. Its hard surface makes it ideal for teaching. It allows writing with chalk and is commonly used for instruction, meetings, and personal and family note-taking. A blackboard eraser is an extremely common teaching tool, primarily used to remove chalk marks from the blackboard. Its main function is to remove chalk writing or drawings by rubbing against the blackboard surface, allowing the blackboard to be reused for writing and drawing, maintaining its cleanliness and reusability, and facilitating teaching, demonstrations, and communication.
[0003] When cleaning existing blackboard erasers after use, the dust on the surface is shaken off, which causes the dust to fly around. Manual cleaning is time-consuming, laborious, and ineffective. The flying dust seriously pollutes the environment and is harmful to human health when inhaled. Utility Model Content
[0004] To overcome the above shortcomings, this utility model provides a blackboard eraser that aims to improve the problems of existing blackboard erasers causing dust to fly up and pollute the environment when patted during cleaning, as well as the health hazards of inhalation.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a blackboard eraser, including a fixed box, with second sliding grooves on both the front and rear sides of the fixed box, a connecting frame slidably connected between the two second sliding grooves, a movable component fixedly connected between the left and right sides of the bottom of the connecting frame, a third sliding groove on the top of the movable component, a fixed rod slidably connected within the third sliding groove, a motor fixedly connected to the bottom of the inner wall of the fixed box, an eccentric wheel fixedly connected to the output end of the motor, a fixed rod fixedly connected to the eccentric wheel, an erasing component fixedly connected to the top of the fixed box, a scraper fixedly connected to the top of the inner side of the connecting frame, and an extension component provided at the bottom of the fixed box for extending the blackboard eraser.
[0006] Preferably, the extension assembly includes a gear, which is rotatably connected to the inner wall of the connector. Slide rods are fixedly connected to both sides of the inner wall of the connector, and racks are slidably connected to the surfaces of the two slide rods. The two racks are meshed with the gear.
[0007] Preferably, each of the two racks is fixedly connected to an actuating rod on opposite sides, and both actuating rods penetrate and extend to the outside of the connector, with the actuating rods slidably connected to the connector.
[0008] Preferably, each of the two racks is fixedly connected to a spring on the side away from the push rod, and the opposite sides of the two springs are fixedly connected to the connecting member.
[0009] Preferably, the top of the connector has two first sliding grooves, and a clamping block is slidably connected in each of the two first sliding grooves.
[0010] Preferably, the bottoms of both clamping blocks are fixedly connected to the adjacent rack.
[0011] Preferably, the bottom of the fixing box has two slots.
[0012] Preferably, a connecting rod is fixedly connected to the bottom of the connector, and a handle is fixedly connected to the front side of the connecting rod.
[0013] This utility model has the following beneficial effects:
[0014] 1. In this utility model, the eccentric wheel is driven to rotate by a motor. The eccentric wheel drives the fixed rod to slide in the third slide groove on the moving part, thereby driving the connecting frame to slide in the second slide groove. This causes the scraper to move back and forth on the erasing part, thus realizing the scraping and cleaning of dust on the blackboard eraser. This solves the problem that existing blackboard erasers cause dust to fly up and pollute the environment when they are patted during cleaning, and also cause health hazards when inhaled.
[0015] 2. In this utility model, pressing the lever causes the rack to compress the spring, which in turn causes the rack to drive the gear, thereby moving the rack on the other side. At this time, the clamping block on the rack slides in the first groove and is locked into the slot at the bottom of the fixing box, thus fixing it. The handle connected by the connecting rod is extended, which solves the problem that existing blackboard erasers cannot erase high blackboards when students are not tall enough. Attached Figure Description
[0016] Figure 1 This is a three-dimensional view of a blackboard eraser proposed in this utility model;
[0017] Figure 2 This is a cross-sectional schematic diagram of a connector for a blackboard eraser proposed in this utility model;
[0018] Figure 3 This is a schematic diagram of the bottom of a blackboard eraser fixing box proposed in this utility model;
[0019] Figure 4 This is a cross-sectional schematic diagram of a blackboard eraser fixing box proposed in this utility model.
[0020] Legend:
[0021] 1. Connector; 2. Connecting rod; 3. Handle; 4. First slide groove; 5. Clamping block; 6. Fixing box; 7. Erasing component; 8. Second slide groove; 9. Gear; 10. Rack; 11. Pressing rod; 12. Slide rod; 13. Spring; 14. Connecting frame; 15. Slot; 16. Scraper; 17. Fixing rod; 18. Motor; 19. Eccentric wheel; 20. Moving component; 21. Third slide groove. DETAILED DESCRIPTION
[0022] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0023] Reference Figures 1-4 This utility model provides an embodiment of a blackboard eraser, including a fixed box 6. The fixed box 6 has second sliding grooves 8 on both its front and rear sides. A connecting frame 14 is slidably connected between the two second sliding grooves 8. A movable component 20 is fixedly connected between the left and right sides of the bottom of the connecting frame 14. A third sliding groove 21 is opened at the top of the movable component 20. A fixed rod 17 is slidably connected within the third sliding groove 21. A motor 18 is fixedly connected to the bottom of the inner wall of the fixed box 6. An eccentric wheel 19 is fixedly connected to the output end of the motor 18. The fixed rod 17 is fixedly connected to the eccentric wheel 19. An erasing component 7 is fixedly connected to the top of the fixed box 6. A scraper 16 is fixedly connected to the top of the inner side of the connecting frame 14. An extension component is provided at the bottom of the fixed box 6 to extend the blackboard eraser.
[0024] Specifically, the motor 18 drives the eccentric wheel 19 to rotate, and the eccentric wheel 19 drives the fixed rod 17 to slide in the third slide groove 21 on the moving part 20, thereby driving the connecting frame 14 to slide in the second slide groove 8, thereby driving the scraper 16 to move back and forth on the erasing part 7. When in use, the connecting frame 14 slides to the far left. Since the left side of the second slide groove 8 is lower, the connecting frame 14 moves downward, which does not affect the erasing part 7 to erase. This achieves the scraping off of dust from the blackboard eraser, solving the problem that existing blackboard erasers cause dust to fly up and pollute the environment when being patted during cleaning, as well as the problem that inhaling dust can harm human health.
[0025] Reference Figure 1 and Figure 2The extension assembly includes a gear 9, which is rotatably connected to the inner wall of the connector 1. Slide rods 12 are fixedly connected to both sides of the inner wall of the connector 1. Racks 10 are slidably connected to the surfaces of both slide rods 12, and both racks 10 are meshed with the gear 9. A push rod 11 is fixedly connected to the opposite side of each rack 10, extending through and to the outside of the connector 1, and is slidably connected to the connector 1. Springs 13 are fixedly connected to the side of each rack 10 away from the push rod 11, and the opposite side of each spring 13 is fixedly connected to the connector 1. Two first sliding grooves 4 are formed at the top of the connector 1, and clamping blocks 5 are slidably connected within each of the two first sliding grooves 4. The bottoms of the two clamping blocks 5 are fixedly connected to adjacent racks 10. Two slots 15 are formed at the bottom of the fixing box 6.
[0026] Specifically, by pressing the lever 11, the rack 10 is driven to compress the spring 13, which in turn causes the rack 10 to drive the gear 9 to rotate. This causes the rack 10 on the other side to move on the slide bar 12. At this time, the clamping block 5 on the rack 10 slides in the first slide groove 4 and is inserted into the slot 15 at the bottom of the fixing box 6 to fix it. This allows the handle 3 connected by the connecting rod 2 to be extended, solving the problem that existing blackboard erasers cannot erase high blackboards when students are not tall enough.
[0027] Referring to the figure, a connecting rod 2 is fixedly connected to the bottom of the connector 1, and a handle 3 is fixedly connected to the front side of the connecting rod 2.
[0028] Specifically, the connecting rod 2 and handle 3 are for the user to hold, thereby wiping high places.
[0029] Working principle: The motor 18 drives the eccentric wheel 19 to rotate, and the eccentric wheel 19 drives the fixed rod 17 to slide in the third slide groove 21 on the moving part 20, thereby driving the connecting frame 14 to slide in the second slide groove 8, thereby driving the scraper 16 to move back and forth on the erasing part 7. When in use, the connecting frame 14 slides to the leftmost side. Since the left side of the second slide groove 8 is lower, the connecting frame 14 moves downward without affecting the erasing part 7 to erase, thus scraping off the dust on the blackboard eraser. By pressing the push rod 11, the rack 10 is driven to compress the spring 13, thereby causing the rack 10 to drive the gear 9 to rotate, thereby driving the rack 10 on the other side to move on the slide rod 12. At this time, the clamping block 5 on the rack 10 slides in the first slide groove 4 and is locked into the slot 15 at the bottom of the fixed box 6, thereby fixing it. The handle 3 connected by the connecting rod 2 is extended. The fixed box 6 can be removed for use by pressing the push rod 11, or it can be fixed on the connecting part 1 for use.
[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A blackboard eraser, comprising a retaining box (6), characterized in that: The fixed box (6) has a second sliding groove (8) on both the front and rear sides. A connecting frame (14) is slidably connected between the two second sliding grooves (8). A moving part (20) is fixedly connected between the left and right sides of the bottom of the connecting frame (14). A third sliding groove (21) is opened on the top of the moving part (20). A fixed rod (17) is slidably connected in the third sliding groove (21). A motor (18) is fixedly connected to the bottom of the inner wall of the fixed box (6). An eccentric wheel (19) is fixedly connected to the output end of the motor (18). The fixed rod (17) is fixedly connected to the eccentric wheel (19). An erasing part (7) is fixedly connected to the top of the fixed box (6). A scraper (16) is fixedly connected to the top of the inner side of the connecting frame (14). An extension component is provided at the bottom of the fixed box (6). The extension component is used to extend the blackboard eraser.
2. A blackboard eraser according to claim 1, characterized in that: The extension assembly includes a gear (9), which is rotatably connected to the inner wall of the connector (1). Slide rods (12) are fixedly connected to both sides of the inner wall of the connector (1). Racks (10) are slidably connected to the surfaces of the two slide rods (12), and the two racks (10) are meshed with the gear (9).
3. A blackboard eraser according to claim 2, characterized in that: Both racks (10) are fixedly connected to a push rod (11) on opposite sides. Both push rods (11) extend through and out to the outside of the connector (1). The push rods (11) are slidably connected to the connector (1).
4. A blackboard eraser according to claim 3, characterized in that: Both racks (10) are fixedly connected to springs (13) on the side away from the push rod (11), and the opposite sides of the two springs (13) are fixedly connected to the connector (1).
5. A blackboard eraser according to claim 2, characterized in that: The connector (1) has two first grooves (4) on its top, and clamping blocks (5) are slidably connected in both first grooves (4).
6. A blackboard eraser according to claim 5, characterized in that: The bottoms of both clamping blocks (5) are fixedly connected to the adjacent racks (10).
7. A blackboard eraser according to claim 1, characterized in that: The bottom of the fixing box (6) has two slots (15).
8. A blackboard eraser according to claim 2, characterized in that: The bottom of the connector (1) is fixedly connected to a connecting rod (2), and the front side of the connecting rod (2) is fixedly connected to a handle (3).