Semi-automatic chalk box

Abstract

The utility model discloses a semi-automatic chalk box, and belongs to the technical field of teaching aids. Comprising a box body and a pressing push-out device, a chalk cavity with an upper opening is formed in one side of the box body, a chalk head cavity with an upper opening is formed in the other side of the box body, the chalk cavity gradually becomes smaller downwards, a to-be-pushed-out position is formed at the lower end of the chalk cavity, and a push-out opening is formed in one end of the push-out position; the pressing and pushing-out device is installed in the box body and comprises a pressing structure, a direction conversion structure and a pushing-out structure, the pressing structure is connected with the pushing-out structure through the direction conversion structure, the pressing structure can be pressed downwards in the vertical direction and can reset automatically, and the pushing-out structure is installed at the position to be pushed out in a sliding mode; the push-out end of the push-out structure can move in the horizontal direction and automatically reset. The technical problems that according to a traditional semi-automatic powder box, when chalk is pressed and taken from the side portion, the whole device is easily pushed away, and the chalk is inconvenient to take and use due to the fact that the pressing side and the chalk taking side are located on the two opposite sides are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching aids, in particular to a semi-automatic chalk box. Background Art

[0002] In class, the teacher is used to throwing the remaining chalk stubs back into the original chalk box after writing. In this way, the unused chalk is mixed together, and the written chalk has too much dust, which is very unhygienic and affects the environment of the lectern. Especially for a newly opened full box of chalk, it is very inconvenient to pick up. Through experiments, a semi-automatic chalk box is designed, which can not only prevent the used chalk from being mixed with the new chalk, but also reduce unnecessary trouble when picking up chalk.

[0003] The patent with the publication number of CN113334976A discloses a chalk box that is sealed and moisture-proof and convenient for taking chalk. The chalk is placed in a sealed box body, and the chalk is only pushed out through the pen outlet. When not in use, the sealing plate of the opening and closing mechanism closes the pen outlet, forming a sealed space in the box body, which can effectively prevent the chalk from getting damp. When in use, the driving rod extending out of the box body can be pressed, so that the driving rod moves into the box body, and at the same time, the spring is compressed. Then, the sealing plate of the opening and closing mechanism can be driven to rotate to open the pen outlet in sequence, and the push rod can be driven to move towards the pen outlet, so as to push the chalk out of the box body for a certain distance, so that the teacher can directly take the chalk, which is very convenient. After taking out the chalk, release the driving rod, so that the compressed spring is released and pushes the driving rod to reset, and the sealing plate of the opening and closing mechanism can be automatically driven to rotate to close the pen outlet, and the push rod can be driven to reset, so that the box body is sealed again to maintain the moisture-proof state. There are several problems in the above patent in terms of use: the way of taking chalk by pressing from the side is likely to push the whole chalk box, making it inconvenient to press and push out the chalk. In addition, the pressing side and the chalk-taking side are on two opposite sides, which is inconvenient to use, and its overall structure is complex, resulting in a high cost of the device. Therefore, it is necessary to improve the existing chalk box. Summary of the Invention

[0004] The purpose of the utility model is to provide a semi-automatic chalk box to solve the technical problems that when taking chalk by pressing from the side of the traditional semi-automatic chalk box, the whole device is easily pushed away, and the pressing side and the chalk-taking side are on two opposite sides, resulting in inconvenient use.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A semi-automatic chalk box comprises a box body and a pressing and ejecting device, wherein a chalk chamber with an upper opening is arranged on one side of the box body, and a chalk head chamber with an upper opening is arranged on the other side, the chalk chamber gradually narrows downward, and a waiting ejection position is formed at the lower end of the chalk chamber, and a ejection port is arranged at one end of the ejection position; the pressing and ejecting device is installed in the box body, and the pressing and ejecting device comprises a pressing structure, a direction conversion structure and an ejection structure, the pressing structure is connected to the ejection structure through the direction conversion structure, the pressing structure can be pressed downward in a vertical direction and can be automatically reset, the ejection structure is slidably installed at the waiting ejection position, the ejection end of the ejection structure can move in a horizontal direction and automatically reset, and the direction conversion structure converts the vertical movement of the pressing structure into the horizontal movement of the ejection structure.

[0007] Furthermore, the pressing structure includes a pressing rod and a first elastic member, and the pressing structure is slidably installed in the box body along the vertical direction, the upper end of the first elastic member abuts against the lower end of the pressing rod, and the lower end of the first elastic member abuts against the bottom of the box body.

[0008] Furthermore, the ejection structure includes an ejection member and a second elastic member, a slide groove is provided at the lower end of the to-be-ejected position, the lower part of the ejection member is clamped under the slide groove, the upper end of the ejection member forms an ejection end, one end of the second elastic member is connected to the ejection member, and the other end is connected to the box body.

[0009] Furthermore, the direction conversion structure includes a pulling rope and a plurality of direction conversion shafts, one end of the pulling rope is connected to the lower part of the pressing rod, and the other end is connected to the ejection member; the plurality of direction conversion shafts are mounted on the box body, and the pulling rope is passed through the plurality of direction conversion shafts and is tightened; the pressing rod can move downward to pull the pulling rope, and the pulling rope drives the ejection member to move toward the ejection port.

[0010] Furthermore, it also includes a cover body, which can cover the box body, and the cover body is provided with a clearance hole for the pressing end of the pressing structure to pass through.

[0011] Furthermore, the cover body includes a fixed cover and a movable cover, the fixed cover covers the upper opening of the chalk cavity, the movable cover is hinged to the fixed cover to form a flip cover structure, and the movable cover covers the upper opening of the chalk head cavity.

[0012] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0013] 1. When the utility model is in use, the whole piece of chalk is placed in the chalk cavity, and the chalk at the lower part can fall to the position to be pushed out; the pushing outlet faces the user. The user can press the pushing device from top to bottom, and the chalk at the position to be pushed out can be pushed out partially and then automatically retracted by vertical pressing. The user can take out the chalk from the pushing outlet for use, and another piece of chalk will fall into the position to be pushed out. The short chalk head after use can be directly put into the chalk cavity for storage. Based on the above, the actions of pressing and taking the chalk can be directly completed in one direction, solving the technical problems that in the traditional semi-automatic powder box, it is easy to push the whole device away when pressing and taking the chalk from the side, and it is inconvenient to take the chalk because the pressing side and the taking side are on two opposite sides. At the same time, the chalk head can be placed separately from the whole piece of chalk.

[0014] 2. By setting a cover body, the utility model can reduce the moisture absorption of the chalk and the flying out of the chalk tip. By setting the form of a movable cover, it is convenient to open when placing the chalk head, and the operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the three-dimensional structure diagram of the utility model;

[0016] Figure 2 is the partial sectional structure diagram of the utility model;

[0017] Figure 3 is the sectional structure diagram of the utility model.

[0018] In the drawings, 1 - box body, 2 - pressing and pushing device, 3 - cover body, 11 - chalk cavity, 12 - chalk head cavity, 13 - position to be pushed out, 14 - pushing outlet, 15 - chute, 16 - curved plate, 17 - installation cavity, 21 - pressing structure, 22 - direction conversion structure, 23 - pushing structure, 211 - pressing rod, 212 - first elastic member, 221 - pushing member, 222 - second elastic member, 231 - pulling rope, 232 - direction conversion shaft, 31 - relief hole, 32 - fixed cover, 33 - movable cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following further describes the specific implementation of the utility model with reference to the drawings.

[0020] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0021] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a direct connection, or an indirect connection through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0023] Please refer to Figures 1 to 3 , a semi-automatic chalk box, comprising a box body 1 and a pressing and pushing device 2. One side of the box body 1 is provided with a chalk cavity 11 with an upper opening, and the other side is provided with a chalk tip cavity 12 with an upper opening. The chalk cavity 11 gradually narrows downward, and a to-be-pushed position 13 is formed at the lower end of the chalk cavity 11. One end of the to-be-pushed position is provided with a push-out opening 14; the pressing and pushing device 2 is installed in the box body 1. The pressing and pushing device 2 comprises a pressing structure 21, a direction conversion structure 22 and a pushing structure 23. The pressing structure 21 is connected to the pushing structure 23 through the direction conversion structure 22. The pressing structure 21 can be pressed downward in the vertical direction and can automatically reset. The pushing structure 23 is slidably installed at the to-be-pushed position 13. The pushing end of the pushing structure 23 can move horizontally and automatically reset. The direction conversion structure 22 converts the vertical movement of the pressing structure 21 into the horizontal movement of the pushing structure 23. Specifically, two chalk tip cavities 12 are provided, and an installation cavity 17 is arranged between the two chalk tip cavities 12. The chalk cavity 11 is formed by two curved plates 16 to form a gradually narrowing structure. The middle part of one curved plate 166 is smoothly arranged in the horizontal flat edge direction, which can be used to bear the weight of the chalk located above, reduce the pressure on the lower chalk, and facilitate the pushing out of the lower chalk.

[0024] In this embodiment, the pressing structure 21 is installed in the installation cavity 17, and the pressing structure 21 includes a pressing rod 211 and a first elastic member 212. The pressing structure 21 is slidably installed in the box body 1 along the vertical direction, and the upper end of the first elastic member 212 abuts against the lower end of the pressing rod 211, and the lower end of the first elastic member 212 abuts against the bottom of the box body 1. Specifically, the first elastic member 212 is a spring, and the abutment structure at both ends of the spring is provided with a convex column that can be inserted into the spring.

[0025] In this embodiment, the ejection structure 23 includes an ejection member 221 and a second elastic member 222. A slide groove 15 is provided at the lower end of the ejection position 13. The lower part of the ejection member 221 is clamped under the slide groove 15. The upper end of the ejection member 221 forms an ejection end. One end of the second elastic member 222 is connected to the ejection member 221, and the other end is connected to the box body 1. Specifically, the second elastic member 222 is elastic rubber, and the elastic rubber can shrink automatically.

[0026] In this embodiment, the direction conversion structure 22 includes a pulling rope 231 and a plurality of direction conversion shafts 232. One end of the pulling rope 231 is connected to the lower part of the pressing rod 211, and the other end is connected to the ejection member 221. The plurality of direction conversion shafts 232 are installed on the box body 1. The pulling rope 231 is wound through the plurality of direction conversion shafts 232 and tightened. The pressing rod 211 moves downward to pull the pulling rope 231, and the pulling rope 231 drives the ejection member 221 to move toward the ejection port 14. Specifically, the direction conversion shaft 232 may be provided with a pulley. The pulling rope 231 is hung on the pulley to reduce the friction of the pulling rope 231.

[0027] The present embodiment further includes a cover body 3, which can be covered on the box body 1, and is provided with a clearance hole 31 for the pressing end of the pressing structure 21 to pass through. The cover body 3 includes a fixed cover 32 and a movable cover 33, the fixed cover 32 covers the upper opening of the chalk chamber 11, the movable cover 33 is hinged with the fixed cover 32 and forms a flip cover structure, and the movable cover 33 covers the upper opening of the chalk head chamber 12.

[0028] The specific usage principles are as follows:

[0029] 1. Place the whole piece of chalk in the chalk chamber 11, and the chalk at the bottom can fall into the waiting position 13.

[0030] 2. Make the ejection port 14 face the user, the user can press the pressing member from top to bottom, the pressing rod 211 moves downward to pull the pulling rope 231, the pulling rope 231 drives the ejection member 221 to move toward the ejection port 14, and partially ejects the chalk; release the pressing button, the pressing rod 211 returns to the upper position under the action of the first elastic member 212, and the ejection member 221 is recovered under the action of the second elastic member 222.

[0031] 3. After taking the chalk pushed out by the chalk, a piece of chalk can automatically fall into the to-be-pushed position 13 and wait for the next pressing and taking action.

[0032] 4. When the chalk head needs to be placed, just turn up the movable cover 33.

[0033] The above description is a detailed description of the preferred and feasible embodiment of the present invention. However, the embodiment is not intended to limit the scope of the patent application of the present invention. Any equivalent changes or modifications made under the technical spirit disclosed by the present invention shall fall within the scope of the patent covered by the present invention.

Claims

1. A semi-automatic chalk box, characterized in that: The invention comprises a box body and a pressing and ejecting device, wherein a chalk chamber with an upper opening is arranged on one side of the box body, and a chalk head chamber with an upper opening is arranged on the other side, the chalk chamber gradually narrows downward, and a waiting ejection position is formed at the lower end of the chalk chamber, and a ejection port is arranged at one end of the ejection position; the pressing and ejecting device is installed in the box body, and the pressing and ejecting device comprises a pressing structure, a direction conversion structure and an ejection structure, the pressing structure is connected to the ejection structure through the direction conversion structure, the pressing structure can be pressed downward in a vertical direction and can be automatically reset, the ejection structure is slidably installed at the waiting ejection position, the ejection end of the ejection structure can move in a horizontal direction and automatically reset, and the direction conversion structure converts the vertical movement of the pressing structure into the horizontal movement of the ejection structure.

2. The semi-automatic chalk box according to claim 1, characterized in that: The pressing structure includes a pressing rod and a first elastic member. The pressing structure is slidably mounted in the box body along a vertical direction. The upper end of the first elastic member abuts against the lower end of the pressing rod, and the lower end of the first elastic member abuts against the bottom of the box body.

3. A semi-automatic chalk box according to claim 2, characterized in that: The ejection structure includes an ejection member and a second elastic member. A slide groove is provided at the lower end of the ejection position. The lower part of the ejection member is clamped under the slide groove. The upper end of the ejection member forms an ejection end. One end of the second elastic member is connected to the ejection member, and the other end is connected to the box body.

4. The semi-automatic chalk box according to claim 3, wherein: The direction conversion structure includes a pulling rope and a plurality of direction conversion shafts, one end of the pulling rope is connected to the lower part of the pressing rod, and the other end is connected to the ejection member; the plurality of direction conversion shafts are mounted on the box body, and the pulling rope is passed through the plurality of direction conversion shafts and is tightened; the pressing rod can move downward to pull the pulling rope, and the pulling rope drives the ejection member to move toward the ejection port.

5. A semi-automatic chalk box according to claim 1, characterized in that: It also includes a cover body, which can cover the box body, and the cover body is provided with a clearance hole for the pressing end of the pressing structure to pass through.

6. The semi-automatic chalk box according to claim 5, wherein: The cover body comprises a fixed cover and a movable cover, wherein the fixed cover covers the upper opening of the chalk cavity, the movable cover is hinged with the fixed cover to form a flip cover structure, and the movable cover covers the upper opening of the chalk head cavity.

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