CN113334976A

CN113334976A - Chalk box with characteristics of sealing, moisture prevention and convenient chalk taking

Info

Publication number: CN113334976A
Application number: CN202110667190.2A
Authority: CN
Inventors: 李煜颖
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-16
Filing date: 2021-06-16
Publication date: 2021-09-03

Abstract

The invention relates to the field of teaching aids, in particular to a sealed and moisture-proof chalk box convenient for taking chalks. When the chalk box is used, the driving rod extending out of the box body can be pressed to move the driving rod into the box body, meanwhile, the spring is compressed, the sealing plate of the opening and closing driving mechanism which can be sequentially driven rotates to the chalk outlet to be opened, the push rod is driven to move towards the chalk outlet, so that the chalk is pushed out of the box body by one section, a teacher can directly take the chalk, and the chalk box is very convenient. And after taking out the chalk, unclamp the actuating lever, make the spring release of compressed and promote the actuating lever to reset, can the automatic drive mechanism that opens and shuts the shrouding rotate to go out the pen mouth and close to and drive the push rod and reset to make the box body realize airtight once more, with the state that keeps damp-proofing.

Description

Chalk box with characteristics of sealing, moisture prevention and convenient chalk taking

Technical Field

The invention relates to the field of teaching aids, in particular to a chalk box which is sealed, moisture-proof and convenient for taking chalks.

Background

In the daily teaching work process of the instructor, the chalk is a necessary tool for a teacher to write teaching contents on the blackboard, the existing chalks are placed on a platform in a paper box storage mode, the poor sealing performance of the paper box is that the chalk is easily affected with damp, if the damp chalk is difficult to use or even cannot be used, great inconvenience is brought to writing on the blackboard. Meanwhile, a large amount of chalks are squeezed in the chalk box, so that the chalks are inconvenient to draw and easy to break when being used.

Disclosure of Invention

The invention provides a sealed and moisture-proof chalk box convenient for taking chalks, which solves the problems that the existing chalk box placed on a platform is easy to be wetted and inconvenient to take.

The invention adopts the following technical scheme: the utility model provides a sealed dampproofing and be convenient for get chalk box of chalk, including the box body, this box internal fixation has the fill of placing, place the fill and have the inclined plane of a downward sloping at least, and the box body is equipped with out pen opening, its characterized in that in the below that corresponds this inclined plane: the pen box is characterized in that an opening and closing mechanism and a pen pushing mechanism are further arranged in the box body, the opening and closing mechanism comprises a fixing plate, a driving wheel, a connecting rod and a sealing plate, a through hole is formed in the center of the fixing plate, the through hole of the fixing plate corresponds to the pen outlet with the same axle center, and a plurality of limiting pins and a plurality of connecting pins are further annularly fixed on the fixing plate by taking the center of the through hole as an axle; the center of the driving wheel is provided with a yielding hole, the driving wheel is provided with a plurality of limiting holes in a shaft collar shape by taking the center of the yielding hole as the center, the limiting holes are arc-shaped kidney-shaped holes coaxial with the through hole of the driving wheel, and each limiting pin correspondingly penetrates through each limiting hole; the sealing plates are of a triangular structure, the number of the sealing plates is consistent with that of the connecting pins, one corner of each sealing plate is hinged with each connecting pin, the other corner of each sealing plate is hinged with one end of the connecting rod, and the other end of the connecting rod is hinged to the driving wheel; the driving wheel is meshed with the driving wheel, one surface of the driving wheel is fixedly connected with a transmission rod, and a spiral strip is fixed on the ring surface of the transmission rod; the pen pushing mechanism comprises a driving rod, a push rod and rotating wheels, one end of the driving rod extends out of the box body, the other end of the driving rod is connected with the two rotating wheels, the two rotating wheels are respectively tangent to two side faces of the spiral strip, the bottom of the placing bucket is close to the side face of the driving rod, a strip-shaped moving hole is formed in the side face of the driving rod, one end of the push rod extends into the moving hole, and the other end of the push rod is fixedly connected with the driving rod.

As a further improvement, the opening and closing mechanism further comprises a fixing ring, and each connecting pin penetrates through the fixing ring and the sealing plate in sequence and then is fixedly connected with the fixing plate.

As a further improvement, three edges of the sealing plate are all arcs, the edge corresponding to the corner of the sealing plate connecting rod is an inward concave arc, the edge corresponding to the corner of the sealing plate connecting fixing plate is an outward convex arc, and the outward convex arc is matched with the inward concave arc.

As a further improvement, the pen pushing mechanism further comprises a fixed seat fixed at the bottom of the box body, a connecting hole is formed in the center of the fixed seat, and the driving rod penetrates through the connecting hole.

As a further improvement, the pen pushing mechanism further comprises a spring, the spring is sleeved on the driving rod, and two ends of the spring respectively abut against the fixed seat and the push rod.

As a further improvement, a guide plate is fixed in the placing hopper and is provided with two planes which are bent at right angles, wherein one plane is parallel to the inclined plane, the gap between the plane and the inclined plane is slightly larger than the diameter of one piece of chalk, and the other plane is fixed on the placing hopper

From the above description of the structure of the present invention, compared with the prior art, the present invention has the following advantages: according to the chalk box, the chalk is placed in the sealed box body, the chalk is pushed out only through the chalk outlet, and when the chalk box is not used, the closing plate of the opening and closing mechanism closes the chalk outlet, so that a completely sealed space can be formed in the box body, and the chalk can be effectively prevented from being damped. When the chalk box is needed to be used, the driving rod extending out of the box body can be pressed to enable the driving rod to move into the box body, the spring of the chalk pushing mechanism is compressed, the sealing plate of the opening and closing mechanism can be sequentially driven to rotate to the chalk outlet to be opened, the push rod is driven to move towards the chalk outlet, and therefore the chalk is pushed out to the outside of the box body, a teacher can directly take the chalk, and the chalk box is very convenient to use. And after taking out the chalk, unclamp the actuating lever, make the spring of compressed obtain releasing and promote the actuating lever to reset, can the automatic drive mechanism that opens and shuts the shrouding rotate to a mouth and close to and drive the push rod and reset to make the box body realize airtight once more, with the state that keeps damp-proofing.

Drawings

Fig. 1 is a perspective view of the external structure of the present invention.

Fig. 2 is a side view of the internal structure of the present invention.

Fig. 3 is a schematic front view of the internal structure of the present invention.

Fig. 4 is an enlarged view of direction a in fig. 3.

Fig. 5 is a schematic perspective view of the position relationship of the holding bucket, the opening and closing mechanism and the pen pushing mechanism.

Fig. 6 is a schematic view showing the closing plates of the opening and closing mechanism rotating outward of the through hole of the fixing plate.

Fig. 7 is a schematic view showing the closing plates of the opening and closing mechanism rotated toward the center of the through hole of the fixing plate.

Fig. 8 is an exploded perspective view of the opening and closing mechanism.

Fig. 9 is a schematic structural view of the closing plate.

Fig. 10 is a schematic view of the drive wheel and fixed plate connection.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in the attached figures 1 and 2, the chalk box which is sealed and moisture-proof and is convenient for taking chalk comprises a box body 1, wherein the box body 1 can be formed by injection molding or flat plate welding bent by a sheet metal process. A holding hopper 3 for holding a chalk 6 is fixed in the box body 1, and an opening and closing mechanism 5 and a pen pushing mechanism 4 are further arranged in the box body 1. The placing hopper 3 is provided with at least one inclined plane which inclines downwards, the box body 1 is provided with a pen outlet 11 below the inclined plane, specifically, a strip-shaped pen pushing groove 31 is arranged below the inclined plane 32 of the placing hopper 3, a notch at one end of the pen pushing groove 31 corresponds to the pen outlet 11, and a piece of chalk 6 is just put in the depth of the pen pushing groove 31. In addition, the opening above the box body 1 is hinged with a box cover 2 through a hinge, so that the box cover 2 can be turned over from the box body 1 to open or close the opening of the box body 1, when the box body is opened, a chalk 6 can be put into the placing hopper 3 of the box body 1, and when the box cover 2 is closed, the box body 1 is equivalently sealed, and moisture resistance is realized. Further, 2 edges of the box cover can be provided with buckles, the side plate of the box body 1 can be provided with bayonets matched with the buckles, and after the buckles are buckled into the bayonets, the fixation of the box cover 2 and the box body 1 can be realized. Furthermore, the cover 2 may be made of a transparent plastic plate material so as to facilitate the observation of the chalk inside the case body 1.

As shown in fig. 6 to 8, the opening and closing mechanism 5 includes a fixing plate 51, a driving wheel 52, a connecting rod 54 and a sealing plate 53. The center of the fixed plate 51 is provided with a through hole 513, the transmission wheel 52 is of a circular ring structure, and the center of the transmission wheel 52 is provided with a yielding hole 522. Bolts 514 are respectively arranged at four opposite corners of the side plate of the box body 1 corresponding to the fixing plate 51 in a penetrating manner, and the bolts 514 penetrate through the fixing plate 51 and are screwed with nuts, so that the fixing plate 51 is fixed at the inner side of the box body 1, and meanwhile, the through hole 13 of the fixing plate 51 corresponds to the pen outlet 11 of the box body 1 in a coaxial manner. The fixed plate 51 is further fixed with a plurality of limit pins 511 and a plurality of connecting pins 512 in an annular shape by taking the center of the through hole 513 as an axis, the connecting pins 512 are closer to the axis of the through hole 513 of the fixed plate 51 relative to the limit pins 511, and the extended radius lines of the connecting pins 512 are positioned between the extended radius lines of two adjacent limit pins 512. The driving wheel 52 is provided with a plurality of limiting holes 521 in a collar shape by taking the center of the abdicating hole 522 as a shaft, the limiting holes 521 are arc-shaped kidney-shaped holes coaxial with the abdicating hole 522, and each limiting pin 511 correspondingly penetrates through each limiting hole 521. Preferably, the limit pin 511 and the connection pin 512 may be screws, and the limit pin 511 and the connection pin 512 are screwed into a threaded hole (not shown) provided in the fixing plate 51, and the driving wheel 52 may be limited by a structure in which the limit pin 521 passes through the limit hole 521, so that the driving wheel 52 may rotate only around the axis of the through hole 513 of the fixing plate 51, and the abdicating hole 522 of the driving wheel 52 and the through hole 513 of the fixing plate 51 correspond to each other coaxially.

With continued reference to fig. 6 to 8, the number of closure plates 53 and the number of connecting rods 54 correspond to the number of connecting pins 512, i.e. each closure plate 53 is connected to a connecting pin 512 and a connecting rod 54. Specifically, the sealing plates 53 have a triangular structure, and the area of each sealing plate 53 is equal to the area of a sector of the through holes 513, which is equal to the number of the sealing plates 53, so that the through holes 513 can be sealed after the sealing plates 53 are combined (i.e., closed). One corner of each sealing plate 53 is rotatably connected with each connecting pin 512, the other corner of each sealing plate 53 is hinged with one end of the connecting rod 54, and the other end of the connecting rod 54 is hinged on the driving wheel 52. The hinge is a hinge connection structure such that the closing plate 53 and the fixing plate 51 are rotatable with each other and one ends of the closing plate 53 and the link 54 are rotatable with each other and the other end of the link 54 and the transmission wheel 52 are rotatable with each other. When the driving wheel 52 rotates, the connecting rods 54 are synchronously pulled, and the sealing plates 53 are respectively pulled by the connecting rods 54, so that the sealing plates 53 swing relative to the connecting pins 512, thereby forming a state that the sealing plates 53 swing outwards of the through holes 513 of the fixing plate 51 or swing towards the center of the through holes 513, and further realizing the closing or opening of the through holes 51 as shown in fig. 6 and 7. In addition, referring to fig. 9 again, three edges of the sealing plate 53 are all arcs, and the edge corresponding to the corner of the sealing plate 53 connected to the connecting rod 54 is an inward concave arc 531, the edge corresponding to the corner of the sealing plate 53 connected to the fixing plate 51 is an outward convex arc 532, and after each sealing plate 53 swings to the center of the through hole 513 to be closed, the outward convex arc 532 and the inward concave arc 531 are engaged with each other, so that the structure can prevent each two adjacent sealing plates 53 from blocking or interfering with each other in the swinging process.

As shown in fig. 3 and 5, the pen pushing mechanism 4 includes a driving rod 41, a pushing rod 42, a fixing seat 43, and a spring 44. The fixing base 43 is fixed at the bottom of the box body 1, and corresponding to the lower part of the inclined plane 32 of the placing bucket 3, a connecting hole (not shown in the figure) is arranged at the center of the fixing base 43, the driving rod 41 is adapted and passes through the connecting hole, and the driving rod 41 is limited to move only in a straight line through the structure. One end of the driving rod 41 penetrates through a hole formed in a side plate of the box body 1 and extends out of the box body 1 to form a key 46, a strip-shaped moving hole 35 is formed in the side face, close to the driving rod 41, of the pen pushing groove 31 at the bottom of the placing bucket 3, one end of the push rod 42 penetrates through the moving hole 35 and extends into the placing bucket 3, the other end of the push rod 42 is fixedly connected with the driving rod 41 outside the placing bucket 3, and specifically, the push rod 42 penetrates through the driving rod 42 and then is fixed by screw locking nuts on two sides of the driving rod. One end of the push rod 42 extending into the holding bucket 3 is formed with a plane perpendicular to the bottom of the chalk groove 31, and the plane is brought into contact with the end face of the chalk 6, thereby facilitating the pushing of the chalk 6 from the chalk groove 31. In addition, the spring 44 is sleeved on the driving rod 41, and two ends of the spring 44 respectively abut against the fixed seat 41 and the push rod 42.

As shown in fig. 3 to 7, the opening and closing mechanism 5 further comprises a driving wheel 55 rotatably connected to the fixing plate 5, the driving wheel 55 and the transmission wheel 52 are both gears, and the driving wheel 55 is meshed with the transmission wheel 52. A coaxial transmission rod 551 is fixedly welded to a side of the driving wheel 55 facing away from the fixed plate 51, and a helical spiral 552 is fixed to the circumference of the transmission rod 551. The driving wheel and the fixing plate are rotatably connected in a manner as shown in fig. 10, a concave threaded hole is formed in an end surface of the driving wheel 55, which faces away from the driving rod 551, the threaded hole is connected with a rotating bolt 553 in a matching manner, the fixing plate 51 is provided with a mounting hole 514 at a position where the driving wheel 55 is mounted, the bolt 553 passes through the mounting hole 514 and then is screwed with the threaded hole of the driving wheel 55 to be fastened, and a gap is formed between a screw head of the rotating bolt 553 and the fixing plate 51 during assembly, so that the rotating bolt 553 and the driving wheel 55 can rotate relative to the mounting hole 514 of the fixing plate 51. Referring to fig. 3 to 7 again, the pen pushing mechanism 4 further includes a rotating wheel 45, two rotating wheels 45 are connected to one end of the driving rod 41, which is far away from the outside of the box body 1 (i.e., the button 411), the rotating wheel 45 may be a bearing or a hollow tubular shaft sleeve, through providing a threaded hole on the driving rod 41, and then the bolt 451 is fastened with the threaded hole after passing through the center of the rotating wheel 45, so that the connection of the rotating wheel 45 is realized, and the bolt 451 is turned at the loudness of the rotating wheel. The two rotating wheels 45 are also tangent to two side surfaces of the spiral strip 552, and the tangent between the rotating wheel 45 and the spiral strip 552 plays a role in limiting and guiding the spiral strip 552 when the driving rod 41 drives the rotating wheel 45 to move linearly, which is equivalent to driving the spiral strip 552 to gradually move along the length direction of the spiral thereof so that the two rotating wheels 45 move, thereby enabling the driving rod 551 to rotate. When the transmission rod 551 rotates, the driving wheel 55 rotates to drive the transmission wheel 52 to rotate, and further, each sealing plate 53 connected to the transmission wheel 52 rotates towards the outside of the through hole 513 of the fixing plate 51, so as to open the through hole 513, and therefore, the chalk 6 can be output from the chalk outlet 11.

As shown in fig. 2, 3 and 5, the top of each of the two inclined planes 32 of the placing hopper 3 is bent to form a vertically downward connecting portion 33, the connecting portion 33 is used for being connected to the box body 1, specifically, a threaded hole or a fixing nut may be provided on the connecting portion 33, and then a bolt is threaded from the outside of the box body 1 to the threaded hole or the nut of the connecting portion 33 to achieve fixing. The two sides of the inclined plane 32 of the placing bucket 3 are both fixed with a baffle 36, the baffles 36 do not block the notches at the two ends of the pen pushing groove 31, and a gap is formed between each baffle 36 and the corresponding side plate of the box body 1, preferably, the tops of the two gaps are sealed with the flat plate 34 which is bent outwards and horizontally through the two baffles 36. The gap close to the opening and closing mechanism 5 is equivalent to the extension of the stroke of the chalk 6 moving out from the chalk outlet groove 31 to the chalk outlet 11, so that the chalk 6 can move out to the chalk outlet 11 after the opening and closing mechanism 5 is opened; the gap between the opening and closing mechanism 5 can be used as a space for placing the push rod 42, so that the push rod 42 can be completely positioned outside the tail end of the pen pushing groove 31, and the chalk 6 is prevented from falling on the push rod 42 and being incapable of being pushed.

In addition, as shown in fig. 2, a guide plate 37 is fixed in the placing hopper 3, the guide plate 37 has two planes which are at right angles to each other, one of the planes is parallel to the inclined plane 32, the gap between the plane and the inclined plane 32 is slightly larger than the diameter of one piece of chalk 6, and the other plane is fixed on the placing hopper 3. By the guiding action of the two planes of the guide plate 37, a channel communicated with the pen pushing groove 31 can be formed between the plane of the guide plate 37 and the inclined plane 32, and only one row of chalks 6 can be conveyed, so that two chalks 6 are prevented from being simultaneously clamped at the upper end of the pen pushing groove 31. Furthermore, the two inclined planes 32 and the pen pushing groove 31 of the placing bucket 3 can be formed by bending a stainless steel plate into a whole, and the baffle 36 and the guide plate 37 are fixed on the inclined planes 32 in a welding mode or an adhesive mode after being formed by bending the same metal plate.

When the chalk 6 is required to be used, the push button 411 extending out of the case 1 is pressed, so that the driving lever 41 is moved into the case 1 and the spring 44 is compressed. In the moving process, the driving rod 41 moves to finally drive the sealing plate 53 of the opening and closing mechanism 5 to rotate outwards the pen outlet 11 in sequence, and then drive the push rod 42 to move towards the pen outlet 11, so that the chalk 6 is pushed out to a section to the outside of the box body 1, and a teacher can directly take the chalk 6, and the chalk opening and closing mechanism is very convenient. After the chalk 6 is taken out, the button 411 is released, the compressed spring 44 is released, the driving rod 41 is pushed to reset, namely, the driving rod 41 moves towards the direction of the button 411, the push rod 42 can move to the tail end of the pen pushing groove 31 of the placing hopper 3, and the driving wheel 55 can be driven to rotate reversely, so that the driving wheel 52 also rotates reversely, each sealing plate 53 rotates towards the through hole 513 of the fixing plate 51, the closing of the pen opening 11 is restored, and the sealing and moisture-proof effects of the chalk box in the unused state are realized through the mode.

In addition, a drawer 12 can be connected to the box body 1 in a gap below the inclined surface 32 of the placing hopper 3, and the drawer 12 can be used for recycling waste chalk ends, so that resource waste is effectively avoided, and the internal space of the chalk box can be effectively utilized.

The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the present invention.

Claims

1. The utility model provides a sealed dampproofing and be convenient for get chalk box of chalk, including the box body, this box internal fixation has the fill of placing, place the fill and have the inclined plane of a downward sloping at least, and the box body is equipped with out pen opening, its characterized in that in the below that corresponds this inclined plane: the pen box is characterized in that an opening and closing mechanism and a pen pushing mechanism are further arranged in the box body, the opening and closing mechanism comprises a fixing plate, a driving wheel, a connecting rod and a sealing plate, a through hole is formed in the center of the fixing plate, the through hole of the fixing plate corresponds to the pen outlet with the same axle center, and a plurality of limiting pins and a plurality of connecting pins are further annularly fixed on the fixing plate by taking the center of the through hole as an axle; the center of the driving wheel is provided with a yielding hole, the driving wheel is provided with a plurality of limiting holes in a shaft collar shape by taking the center of the yielding hole as the center, the limiting holes are arc-shaped kidney-shaped holes coaxial with the through hole of the driving wheel, and each limiting pin correspondingly penetrates through each limiting hole; the sealing plates are of a triangular structure, the number of the sealing plates is consistent with that of the connecting pins, one corner of each sealing plate is hinged with each connecting pin, the other corner of each sealing plate is hinged with one end of the connecting rod, and the other end of the connecting rod is hinged to the driving wheel; the driving wheel is meshed with the driving wheel, one surface of the driving wheel is fixedly connected with a transmission rod, and a spiral strip is fixed on the ring surface of the transmission rod; the pen pushing mechanism comprises a driving rod, a push rod and rotating wheels, one end of the driving rod extends out of the box body, the other end of the driving rod is connected with the two rotating wheels, the two rotating wheels are respectively tangent to two side faces of the spiral strip, the bottom of the placing bucket is close to the side face of the driving rod, a strip-shaped moving hole is formed in the side face of the driving rod, one end of the push rod extends into the moving hole, and the other end of the push rod is fixedly connected with the driving rod.

2. A sealed moisture-proof chalk holder for facilitating chalk access as claimed in claim 1, wherein: the opening and closing mechanism further comprises fixing rings, and the connecting pins penetrate through the fixing rings and the sealing plates in sequence and then are fixedly connected with the fixing plates.

3. A sealed moisture-proof chalk holder for facilitating chalk access as claimed in claim 1, wherein: three limits of shrouding are the pitch arc, and the limit that the angle of shrouding connecting rod corresponds is inside sunken pitch arc, and the limit that the angle that the fixed plate was connected to the shrouding corresponds is outside convex pitch arc, and this outside convex pitch arc agrees with each other with inside sunken pitch arc.

4. A sealed moisture-proof chalk holder for facilitating chalk access as claimed in claim 1, wherein: the pen pushing mechanism further comprises a fixing seat fixed at the bottom of the box body, a connecting hole is formed in the center of the fixing seat, and the driving rod penetrates through the connecting hole.

5. A sealed, moisture-proof, chalk-easy access chalk holder as defined in claim 4, wherein: the pen pushing mechanism further comprises a spring, the spring is sleeved on the driving rod in a penetrating mode, and two ends of the spring respectively abut against the fixed seat and the push rod.

6. A sealed moisture-proof chalk holder for facilitating chalk access as claimed in claim 1, wherein: the inside of the placing hopper is also fixed with a guide plate, the guide plate is provided with two planes which are bent to form a right angle, one plane is parallel to the inclined plane, the gap between the plane and the inclined plane is slightly larger than the diameter of one piece of chalk, and the other plane is fixed on the placing hopper.