Dust-falling-free blackboard eraser
By integrating dust collecting bags and ball installation sleeves in the blackboard eraser, the problem of dust-induced by conventional blackboard eraser is solved, and the dust-free wipe effect is achieved, reducing the risk of health for teachers and students.
Patent Information
- Application Number
- CN202421334169.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-12
AI Technical Summary
When used, a regular blackboard wipe will produce a lot of chalk dust, affecting the health of teachers and students.
A dust-free blackboard wipe is designed, and the dust collection bag and ball installation cover are used to ensure that the chalk ash falls directly into the dust collection bag during the wiping process to prevent dust from flying.
It effectively prevents a large amount of dust from occurring, reduces the adverse impact of shaving the blackboard on the health of teachers and students, and ensures that chalk ash does not leak out when placed through a leak-proof clamping device.
Smart Images
Figure CN222663032U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of blackboard erasers, and in particular relates to a dust-free blackboard eraser. Background Art
[0002] A blackboard eraser is a tool specially used to erase chalk writing on a blackboard. It is designed and used to facilitate teachers and students to erase the contents on the blackboard at any time during the teaching process. However, when a conventional blackboard eraser is used, as the eraser moves, the chalk dust brushed off by the eraser surface will not only fall to the ground and need to be cleaned later, but also generate a certain amount of dust, which has an adverse effect on the health of teachers and students. Utility Model Content
[0003] In view of the above problems, the purpose of the utility model is to provide a dust-free blackboard eraser, which can effectively prevent the generation of a large amount of dust when using the device to erase the blackboard, thereby reducing the adverse effects of erasing the blackboard on the health of teachers and students.
[0004] To achieve the above objectives, the utility model provides the following technical solutions: a dust-free blackboard eraser, comprising an eraser body, a connecting seat is provided on the back of the eraser body, a holding plate is provided on the back of the connecting seat, a telescopic cavity is provided on the side of the eraser body, a telescopic rod is inserted and installed on the inner side of the telescopic cavity, one end of the telescopic rod is connected to a ball mounting sleeve, a ball is provided inside the ball mounting sleeve, a spring is provided inside the telescopic cavity, a connecting plate is sleeved on the outer side of the telescopic rod, the connecting plate is integrally formed with an outer cover body, a dust bag fixing nail is provided on the side of the outer cover body, a dust bag is fixedly provided on the outer side of the outer cover body through the dust bag fixing nail, a storage insert bag is provided on the side of the dust bag, and a leak-proof clamp device is provided inside the storage insert bag.
[0005] The beneficial effects of the utility model are as follows: when the device is in use, the holding plate is held to contact the ball with the blackboard, and then the holding plate is pressed, so that the wiping surface on the blackboard eraser body contacts the blackboard, and at this time, the dust collecting bag on the outer cover body cooperates with the outer cover body to complete the sealing between the device and the blackboard, and at this time, the blackboard eraser body is pushed to wipe the blackboard. Due to the provision of the ball mounting sleeve and the ball, while maintaining the supporting effect on the device, the resistance of the device moving on the blackboard is reduced, and the chalk dust wiped off can directly fall into the dust collecting bag to prevent dust from flying. After the blackboard is wiped, the outer cover body is pressed by one hand, and the pressing of the holding plate is repeatedly relaxed and restored by the other hand to shake the blackboard eraser body, so that the dust remaining on the wiping surface of the blackboard eraser body is shaken into the dust collecting bag, so that when the device is used to wipe the blackboard, a large amount of dust is effectively prevented from being generated, and the adverse effect of wiping the blackboard on the health of teachers and students is reduced.
[0006] After shaking off the dust, the device can be removed, and the anti-leakage clamp device can be taken out from the storage bag, and the dust bag can be clamped and closed by the first clamp and the second clamp. When clamping, the first clamp and the second clamp are respectively placed on the front and back sides of the dust bag, and then the first clamp and the second clamp are rotated to make the two close to each other, so that the buckle is buckled into the buckle groove, and the dust bag is clamped. At this time, the chalk dust in the dust bag cannot leak out, so as to avoid the chalk dust falling out and causing dust due to improper placement, falling and other factors when the device is placed.
[0007] To prevent the telescopic rod from falling out of the telescopic cavity:
[0008] As a further improvement of the above technical solution: one end of the telescopic rod is connected to the limiting plate.
[0009] The beneficial effect of this improvement is that the limiting plate is used to prevent the telescopic rod from escaping from the telescopic cavity.
[0010] To prevent chalk dust from leaking out of the dust bag:
[0011] As a further improvement of the above technical solution: the anti-leakage clamp device includes a first clamp body and a second clamp body, the first clamp body and the second clamp body are pin-connected, one end of the first clamp body is provided with a buckle, and one end of the second clamp body is provided with a buckle groove.
[0012] The beneficial effect of the present improvement is that the dust bag is clamped and closed by the first clamp and the second clamp. When clamping, the first clamp and the second clamp are respectively placed on the front and back sides of the dust bag, and then the first clamp and the second clamp are rotated to make the two close to each other, so that the buckle is buckled into the buckle groove, and the dust bag is clamped. At this time, the chalk dust in the dust bag cannot leak out.
[0013] To fix and release the first clamp and the second clamp:
[0014] As a further improvement of the above technical solution: the buckle is a plastic buckle made of elastic plastic.
[0015] The beneficial effect of this improvement is that the buckle is a plastic buckle made of elastic plastic, which can be deformed under pressure and snapped into the buckle groove during the closing process of the first clamp body and the second clamp body. When the first clamp body and the second clamp body need to be opened, the buckle can be opened by moving it to disengage from the limit between it and the buckle groove.
[0016] To prevent the leak-proof clip from falling out of the storage pocket and being lost:
[0017] As a further improvement of the above technical solution: an anti-lost rope is connected to the first clamp through a connecting ring, and one end of the anti-lost rope is connected to the dust collecting bag.
[0018] The beneficial effect of this improvement is that the provision of the anti-lost rope can prevent the anti-leakage clip device from being lost after falling out of the storage pocket.
[0019] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the right front axonometric structure of the utility model when the dust bag is clamped and closed;
[0021] Figure 2 This is a schematic diagram of the structure of the utility model when the dust bag is not clamped;
[0022] Figure 3 It is a partial cutaway schematic diagram of the utility model;
[0023] Figure 4 It is a partial side sectional structural schematic diagram of the utility model;
[0024] Figure 5 It is a schematic diagram of the back structure of the utility model;
[0025] Figure 6 This is an axonometric diagram of the eraser body of the utility model;
[0026] Figure 7 It is a schematic diagram of the structure of the anti-leakage clamp device of the utility model when it is opened;
[0027] Figure 8 It is a cross-sectional structural diagram of the telescopic cavity and the telescopic rod in the utility model;
[0028] In the figure: 1. eraser body; 2. connecting seat; 3. holding plate; 4. telescopic chamber; 5. telescopic rod; 6. ball mounting sleeve; 7. ball; 8. spring; 9. limit plate; 10. connecting plate; 11. outer cover; 12. dust bag fixing nail; 13. dust bag; 14. anti-leakage clamp device; 15. first clamp body; 16. second clamp body; 17. buckle; 18. buckle slot; 19. anti-lost rope; 20. storage pocket. DETAILED DESCRIPTION
[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present invention.
[0030] like Figure 1-8As shown, a dust-free blackboard eraser comprises an eraser body 1, a connecting seat 2 is provided on the back of the eraser body 1, a holding plate 3 is provided on the back of the connecting seat 2, a telescopic cavity 4 is provided on the side of the eraser body 1, a telescopic rod 5 is inserted and installed on the inner side of the telescopic cavity 4, one end of the telescopic rod 5 is connected with a ball mounting sleeve 6, a ball 7 is provided inside the ball mounting sleeve 6, a spring 8 is provided inside the telescopic cavity 4, a connecting plate 10 is sleeved on the outer side of the telescopic rod 5, the connecting plate 10 is integrally formed with an outer cover body 11, a dust bag fixing nail 12 is provided on the side of the outer cover body 11, a dust bag 13 is fixed on the outer side of the outer cover body 11 through the dust bag fixing nail 12, a storage insert bag 20 is provided on the side of the dust bag 13, and a leak-proof clamp device 14 is provided inside the storage insert bag 20.
[0031] When the device is in use, the holding plate 3 is held to contact the ball 7 with the blackboard, and then the holding plate 3 is pressed, so that the wiping surface on the blackboard eraser body 1 contacts the blackboard. At this time, the dust collecting bag 13 on the outer cover body 11 cooperates with the outer cover body 11 to complete the sealing between the device and the blackboard. At this time, the blackboard eraser body 1 is pushed to wipe the blackboard. Due to the provision of the ball mounting sleeve 6 and the ball 7, while maintaining the supporting effect on the device, the resistance of the device moving on the blackboard is reduced, and the chalk dust wiped off can directly fall into the dust collecting bag 13 to prevent dust from flying. After the blackboard is wiped, the outer cover body 11 is pressed with one hand, and the pressing of the holding plate 3 is repeatedly relaxed and restored with the other hand to shake the blackboard eraser body 1, so that the dust remaining on the wiping surface of the blackboard eraser body 1 is shaken into the dust collecting bag 13, so that when the device is used to wipe the blackboard, a large amount of dust is effectively prevented from being generated, and the adverse effect of wiping the blackboard on the health of teachers and students is reduced.
[0032] After the dust is shaken off, the device can be removed, and the anti-leakage clamp device 14 can be taken out from the storage bag 20, and the dust bag 13 can be clamped and closed by the first clamp body 15 and the second clamp body 16. When clamping, the first clamp body 15 and the second clamp body 16 are respectively placed on the front and back sides of the dust bag 13, and then the first clamp body 15 and the second clamp body 16 are rotated to make the two close to each other, so that the buckle 17 is buckled into the buckle groove 18, and the clamping of the dust bag 13 is completed. At this time, the chalk dust in the dust bag 13 cannot leak out, so as to avoid the chalk dust falling out and causing dust due to improper placement, falling and other factors when the device is placed.
[0033] One end of the telescopic rod 5 is connected to the limiting plate 9 .
[0034] The limiting plate 9 is used to prevent the telescopic rod 5 from escaping from the telescopic cavity 4 .
[0035] The anti-leakage clamp device 14 includes a first clamp body 15 and a second clamp body 16 . The first clamp body 15 and the second clamp body 16 are pin-connected. A buckle 17 is provided at one end of the first clamp body 15 , and a buckle groove 18 is provided at one end of the second clamp body 16 .
[0036] The dust bag 13 is clamped and closed by the first clamp 15 and the second clamp 16. When clamping, the first clamp 15 and the second clamp 16 are respectively placed on the front and back sides of the dust bag 13, and then the first clamp 15 and the second clamp 16 are rotated to make them close to each other, so that the buckle 17 is buckled into the buckle groove 18, and the dust bag 13 is clamped. At this time, the chalk dust in the dust bag 13 cannot leak out.
[0037] The buckle 17 is a plastic buckle made of elastic plastic.
[0038] The buckle 17 is a plastic buckle made of elastic plastic, which can be deformed under pressure and snapped into the buckle groove 18 during the closing process of the first clamp body 15 and the second clamp body 16. When the first clamp body 15 and the second clamp body 16 need to be opened, the buckle 17 can be opened by moving it to disengage from the limit position between it and the buckle groove 18.
[0039] The first clamping body 15 is connected to an anti-lost rope 19 via a connecting ring, and one end of the anti-lost rope 19 is connected to the dust bag 13 .
[0040] The provision of the anti-lost rope 19 can prevent the anti-leakage clamp device 14 from falling out of the storage pocket 20 and being lost.
[0041] The working principle and use process of the utility model are as follows: when the device is in use, the holding plate 3 is held to make the ball 7 contact with the blackboard and then the holding plate 3 is pressed, so that the wiping surface on the blackboard eraser body 1 contacts the blackboard, and at this time, the dust collecting bag 13 on the outer cover body 11 cooperates with the outer cover body 11 to complete the sealing between the device and the blackboard, and at this time, the blackboard eraser body 1 is pushed to wipe the blackboard, and because the ball mounting sleeve 6 and the ball 7 are provided, while maintaining the supporting effect on the device, the resistance of the device moving on the blackboard is reduced, and the chalk dust wiped off can directly fall into the dust collecting bag 13 to avoid dust flying, and after completing the blackboard wiping, the outer cover body 11 is pressed by one hand through the automatic rebound function of the spring 8 and the telescopic function between the telescopic chamber 4 and the telescopic rod 5, and the outer cover body 11 is pressed by the other hand repeatedly, and the pressure on the holding plate 3 is relaxed and restored to shake the blackboard eraser body 1, so as to help the dust remaining on the wiping surface of the blackboard eraser body 1 to be shaken into the dust collecting bag 13, and the shaking is completed. After the dust is collected, the device can be removed, and the anti-leakage clamp device 14 can be taken out from the storage insert bag 20, and the dust bag 13 can be clamped and closed by the first clamp body 15 and the second clamp body 16. When clamping, the first clamp body 15 and the second clamp body 16 are respectively placed on the front and back sides of the dust bag 13, and then the first clamp body 15 and the second clamp body 16 are rotated to make the two close to each other, so that the buckle 17 is buckled into the buckle groove 18, and the dust bag 13 is clamped. The chalk dust in the device cannot leak out, so that the chalk dust can be prevented from falling out and causing dust due to improper placement, falling, etc. when the device is placed. When it is used next time, the buckle 17 and the buckle groove 18 are released, and the first clamp body 15 and the second clamp body 16 are removed and put back into the storage bag 20. The anti-lost rope 19 is set to prevent the leakage-proof clamp device 14 from being lost. When the chalk dust needs to be dumped, the leakage-proof clamp device holding the dust bag 13 can be removed to pour out the chalk dust.
[0042] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.
[0043] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. The above is only the preferred implementation method of the utility model. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principle of the utility model, they can make several improvements, embellishments or changes, and can also combine the above technical features in an appropriate manner; these improvements, embellishments, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.
Claims
1. A dust-free blackboard eraser, characterized in that: The invention comprises an eraser body (1), a connecting seat (2) is arranged on the back of the eraser body (1), a holding plate (3) is arranged on the back of the connecting seat (2), a telescopic cavity (4) is arranged on the side of the eraser body (1), a telescopic rod (5) is inserted and installed inside the telescopic cavity (4), one end of the telescopic rod (5) is connected to a ball mounting sleeve (6), a ball (7) is arranged inside the ball mounting sleeve (6), and a spring (8) is arranged inside the telescopic cavity (4). 8), a connecting plate (10) is sleeved on the outer side of the telescopic rod (5), the connecting plate (10) and the outer cover (11) are integrally formed, a dust bag fixing nail (12) is provided on the side of the outer cover (11), a dust bag (13) is fixed on the outer side of the outer cover (11) through the dust bag fixing nail (12), a storage bag (20) is provided on the side of the dust bag (13), and a leak-proof clamp device (14) is provided inside the storage bag (20).
2. A dust-free blackboard eraser according to claim 1, characterized in that: One end of the telescopic rod (5) is connected to the limiting plate (9).
3. The dust-free blackboard eraser according to claim 1, characterized in that: The anti-leakage clamp device (14) comprises a first clamp body (15) and a second clamp body (16); the first clamp body (15) and the second clamp body (16) are pin-connected, one end of the first clamp body (15) is provided with a buckle (17), and one end of the second clamp body (16) is provided with a buckle groove (18).
4. The dust-free blackboard eraser according to claim 3, characterized in that: The buckle (17) is a plastic buckle made of elastic plastic.
5. The dust-free blackboard eraser according to claim 3, characterized in that: The first clamping body (15) is connected to an anti-lost rope (19) via a connecting ring, and one end of the anti-lost rope (19) is connected to the dust collecting bag (13).