Blackboard eraser

Abstract

The invention discloses a blackboard eraser which comprises a body provided with a cavity, a blackboard eraser body and a blackboard eraser body. The water storage cavity is located at the first end of the cavity; the water conveying cavity is located at the second end of the cavity, is adjacent to the water storage cavity and shares a first cavity wall; a first through hole communicated with the water storage cavity and the water conveying cavity is formed in the first cavity wall; the second end and the first end are arranged back to back; the capillary medium is filled in the water conveying cavity; the wiping piece is attached to the outer side wall of the water conveying cavity, and part of the wiping piece is in contact with the capillary medium; the outer side wall of the water conveying cavity is partially opened; and the plugging piece is used for plugging the first through hole. The blackboard eraser has the effect of reducing dust when a blackboard is wiped.

Description

Technical Field

[0001] The invention relates to the field of teaching tools, in particular to a blackboard eraser. Background Art

[0002] At present, considering the cost problem, quite a few schools still use chalk to write on the blackboard for teaching. This kind of chalk writing is easy to cause dust flying when erasing, which seriously affects the health of teachers and students.

[0003] Nowadays, there are also blackboard erasers that can remove dust, but their structures are relatively complex and the cost is high. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a blackboard eraser, which can reduce the problem of wire breakage in various socket directions.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] A blackboard eraser, comprising:

[0007] a body having a cavity;

[0008] A water storage chamber located at the first end of the cavity;

[0009] The water transfer cavity is located at the second end of the cavity and is disposed adjacent to the water storage cavity and shares a first cavity wall with the water storage cavity. The first cavity wall is provided with a first through hole connecting the water storage cavity and the water transfer cavity. The second end and the first end are disposed opposite to each other.

[0010] A capillary medium is filled in the water transfer cavity;

[0011] A wiping member is attached to the outer wall of the water transfer cavity and partially contacts the capillary medium; the outer wall of the water transfer cavity is partially open;

[0012] A blocking member is used to block the first through hole.

[0013] Optionally, one end of the blocking member is provided with a first external thread, and the first through hole is provided with a first internal thread matching the first external thread.

[0014] Optionally, the sealing member includes a first section and a second section forming a stepped shaft, the first section is provided with the first external thread, and the second section passes through the outer wall of the water storage chamber and extends out; a second through hole is opened on the outer wall of the water storage chamber; the diameter of the second section is larger than the diameter of the first section.

[0015] Optionally, the blocking member is further provided with a first sealing member sleeved on the first section.

[0016] Optionally, the first sealing member is a rubber pad.

[0017] Optionally, the blocking member further includes a handle portion, and a diameter of the handle portion is larger than a diameter of the second section; the blocking member is further provided with a second sealing member sleeved on the second section.

[0018] Optionally, the surface of the handle portion is provided with a grid or stripe structure.

[0019] Optionally, the capillary medium is a sponge, and the volume of the sponge is greater than or equal to the volume of the water transfer cavity.

[0020] Optionally, the wiping piece is a dust-free cloth.

[0021] Optionally, the wiper is detachably mounted on the outer side wall of the water transfer cavity.

[0022] Through the above technical scheme, the blackboard eraser of the present invention comprises: a body having a cavity; a water storage cavity located at the first end of the cavity; a water delivery cavity located at the second end of the cavity and arranged adjacent to the water storage cavity and sharing a first cavity wall; the first cavity wall is provided with a first through hole connecting the water storage cavity and the water delivery cavity; the second end and the first end are arranged opposite to each other; a capillary medium is filled in the water delivery cavity; a wiping piece is attached to the outer wall of the water delivery cavity and partially contacts the capillary medium; the outer wall of the water delivery cavity is partially open; and a blocking piece is used to block the first through hole. In this way, the blackboard eraser of the embodiment of the present invention can reduce dust when wiping the blackboard by storing water in the water storage cavity, transferring the water to the capillary medium through the water delivery cavity, and then wetting the wiping piece through the capillary action of the capillary medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of a blackboard eraser according to an embodiment of the present invention;

[0025] Figure 2 for Figure 1 A local enlarged schematic diagram of the middle A;

[0026] Figure 3 for Figure 1 A local enlarged schematic diagram of point B in the middle.

[0027] Description of reference numerals:

[0028] 1. Main body; 2. Water storage chamber; 3. Water delivery chamber; 4. Capillary medium; 5. Wiping member; 6. Sealing member; 61. First section; 62. Second section; 63. Handle; 7. First sealing member; 8. Second sealing member. DETAILED DESCRIPTION

[0029] An embodiment of the present invention provides a blackboard eraser, comprising:

[0030] A body 1 having a cavity;

[0031] A water storage chamber 2, located at the first end of the cavity;

[0032] The water delivery cavity 3 is located at the second end of the cavity, and is disposed adjacent to the water storage cavity 2 and shares a first cavity wall with the water delivery cavity 3. The first cavity wall is provided with a first through hole connecting the water storage cavity 2 and the water delivery cavity 3. The second end and the first end are disposed opposite to each other.

[0033] A capillary medium 4 is filled in the water delivery cavity 3;

[0034] The wiping member 5 is attached to the outer wall of the water delivery chamber 3 and partially contacts the capillary medium 4; the outer wall of the water delivery chamber 3 is partially open;

[0035] The blocking member 6 is used to block the first through hole.

[0036] It can be understood that a part of the cavity is the water storage cavity 2, and the other part is the water delivery cavity 3, which are separated by a first cavity wall.

[0037] When the blackboard eraser is needed, the blocking member 6 is moved, and water flows from the water storage chamber 2 into the water delivery chamber 3 through the first through hole. The water wets the wiping member 5 through the capillary medium 4. When the wiping member 5 is wiping the blackboard, because it is wet, dust is greatly reduced, and the health of teachers and students is maintained.

[0038] Specifically, the body 1 can be made of plastic material, such as nylon, so that it has sufficient strength and is relatively light.

[0039] In one embodiment, one end of the blocking member 6 is provided with a first external thread, and the first through hole is provided with a first internal thread matching the first external thread.

[0040] The first through hole can be better sealed by the thread.

[0041] It is understandable that in addition to the threads, corresponding sealing measures need to be provided. Based on the threads, there are more supporting parts for sealing, and the implementation is simpler.

[0042] In one embodiment, the sealing member 6 includes a first section 61 and a second section 62 forming a stepped shaft, the first section 61 is provided with the first external thread, and the second section 62 passes through the outer wall of the water storage chamber 2 and extends out; a second through hole is opened on the outer wall of the water storage chamber 2; the diameter of the second section 62 is greater than the diameter of the first section 61.

[0043] That is, the diameter of the blocking member 6 gradually decreases from the outside to the inside, so that it is also convenient for the blocking member 6 to extend inward. The first section 61 and the second section 62 are also respectively configured as a section of thread and a section of optical axis to reduce interference caused by the two sections of thread.

[0044] The second through hole is used for filling water from the outside. After the water in the water storage chamber 2 is used up, the blocking member 6 can be removed and water can be filled through the second through hole.

[0045] In one embodiment, the blocking member 6 is further provided with a first sealing member 7 sleeved on the first section 61 .

[0046] Specifically, after the first external thread and the first internal thread are tightened, the first sealing member 7 is attached to the water storage chamber 2 side of the first chamber wall. In this way, the first sealing member 7 is tightly attached to the surface of the first chamber wall to form a seal, that is, an axial seal is formed. It can be understood that other structures can also be used to form a radial seal, or both. The first sealing member 7 is used to seal between the water storage chamber 2 and the water delivery chamber 3.

[0047] In one embodiment, the first sealing member 7 is a rubber pad.

[0048] In this way, there is enough elasticity to make the sealing performance better, and the rubber has better water resistance and sufficient service life.

[0049] In one embodiment, the blocking member 6 further includes a handle portion 63 , the diameter of the handle portion 63 is greater than the diameter of the second section 62 ; the blocking member 6 is further provided with a second sealing member 8 sleeved on the second section 62 .

[0050] In this way, the water storage chamber 2 and the outside world can be better sealed.

[0051] In one embodiment, a surface of the handle portion 63 is provided with a grid or stripe structure.

[0052] In this way, the user can tighten or loosen the blocking member 6 without the aid of tools.

[0053] In one embodiment, the capillary medium 4 is a sponge, and the volume of the sponge is greater than or equal to the volume of the water transfer cavity 3 .

[0054] The volume of the sponge is greater than or equal to the volume of the water delivery chamber 3. The purpose of the design is that there is no separate water in the water delivery chamber 3, and there is only water absorbed by the sponge. In this way, it can be avoided that the wiping member 5 is too wet, which affects the writing on the blackboard after wiping.

[0055] In one embodiment, the wiping member 5 is a dust-free cloth.

[0056] The dust-free cloth has the advantages of strong cleaning ability, no static electricity, wear resistance, durability and good water absorption.

[0057] In one embodiment, the wiper 5 is detachably mounted on the outer side wall of the water transfer cavity 3 .

[0058] In this way, after being damaged, the wiping member 5 can be replaced with a new one more conveniently.

[0059] The specific embodiments described above further illustrate the technical problems solved, technical solutions and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A blackboard eraser, characterized in that: include: a body having a cavity; A water storage chamber located at the first end of the cavity; The water transfer cavity is located at the second end of the cavity and is disposed adjacent to the water storage cavity and shares a first cavity wall with the water storage cavity. The first cavity wall is provided with a first through hole connecting the water storage cavity and the water transfer cavity. The second end and the first end are disposed opposite to each other. A capillary medium is filled in the water transfer cavity; A wiping member is attached to the outer wall of the water transfer cavity and partially contacts the capillary medium; the outer wall of the water transfer cavity is partially open; A blocking member is used to block the first through hole.

2. The blackboard eraser according to claim 1, wherein: One end of the blocking member is provided with a first external thread, and the first through hole is provided with a first internal thread matching the first external thread.

3. The blackboard eraser according to claim 2, wherein: The sealing member includes a first section and a second section forming a stepped shaft, the first section is provided with the first external thread, and the second section passes through the outer wall of the water storage cavity and extends out; a second through hole is opened on the outer wall of the water storage cavity; the diameter of the second section is greater than the diameter of the first section.

4. The blackboard eraser as claimed in claim 3, characterized in that: The blocking member is further provided with a first sealing member sleeved on the first section.

5. The blackboard eraser as claimed in claim 4, characterized in that: The first sealing member is a rubber pad.

6. The blackboard eraser as claimed in claim 3, characterized in that: The blocking member further includes a handle portion, the diameter of which is larger than the diameter of the second section; the blocking member is further provided with a second sealing member sleeved on the second section.

7. The blackboard eraser according to claim 6, wherein: The surface of the handle is provided with a grid or stripe structure.

8. The blackboard eraser according to claim 1, characterized in that: The capillary medium is a sponge, and the volume of the sponge is greater than or equal to the volume of the water transfer cavity.

9. The blackboard eraser according to claim 1, characterized in that: The wiping piece is a dust-free cloth.

10. The blackboard eraser according to claim 1, characterized in that: The wiping member is detachably mounted on the outer side wall of the water transfer cavity.

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