Teaching tool with adjustable height

Abstract

A height-adjustable teaching aid comprises a bottom frame, a first guide rod vertically arranged on the bottom frame, a linkage seat arranged on the first guide rod in a sliding mode, a position adjusting plate arranged on the linkage seat and matched with the first guide rod, a handwriting board arranged on the position adjusting plate and two supporting arm assemblies arranged between the linkage seat and the bottom frame. The clamping plate is provided with a position adjusting hole extending in the horizontal direction, the position adjusting hole penetrates through the clamping plate in the front-back direction, the bottom hole wall of the position adjusting hole is a matching face, the clamping plate is provided with a first clamping hole set, a second clamping hole set and a third clamping hole set which extend inwards on the matching face, and the supporting arm assembly comprises a supporting arm body, a clamping strip and a handle. The height of the handwriting board can be quickly adjusted, the whole operation process is simple, the operation is simple and convenient, and the use convenience of the teaching aid is effectively improved.

Description

Technical Field

[0001] The utility model relates to a teaching tool, in particular to a teaching aid with adjustable height. Background Art

[0002] Teaching aids refer to models, physical objects, specimens, instruments, charts, slides, etc. used to explain a certain thing, including teaching equipment, teaching instruments, training equipment, educational equipment, experimental equipment, teaching specimens, teaching models, etc. Teaching aids are for the purpose of spreading information and are indispensable equipment in teaching activities.

[0003] For the existing teaching aids with writing boards, their heights are fixed and cannot be freely adjusted according to actual needs, which brings troubles to users. For this usage defect, some teaching aids also adopt the screw drive method for position adjustment. However, when performing position adjustment operations, the efficiency is low, which also brings inconvenience to users. Summary of the Utility Model

[0004] Based on this, in view of the deficiencies in the prior art, it is necessary to provide a teaching aid with adjustable height.

[0005] The technical solution of the utility model is as follows: a teaching aid with adjustable height, including a bottom frame, a first guide rod vertically installed on the bottom frame, a linkage seat slidably arranged on the first guide rod, an adjustment plate installed on the linkage seat and cooperatively installed with the first guide rod, a writing board installed on the adjustment plate, and two support arm assemblies arranged between the linkage seat and the bottom frame. The bottom frame includes a clamping plate, and the clamping plate is provided with an adjustment hole extending in the horizontal direction. The adjustment hole penetrates the clamping plate in the front-rear direction, and the bottom hole wall of the adjustment hole is a mating surface. The clamping plate is provided with a first clamping hole group, a second clamping hole group, and a third clamping hole group extending inwards on the mating surface. The support arm assembly includes a support arm body, a clamping bar, and a handle. The clamping bar is vertically connected to the support arm body. One end of the support arm body is movably installed on the linkage seat, and the clamping bar passes through the adjustment hole. When the support arm assembly supports the linkage seat, the clamping bars on the two support arm assemblies are limited by the third clamping hole group, or the clamping bars on the two support arm assemblies are limited by the first clamping hole group and the second clamping hole group.

[0006] In one embodiment, the third clamping hole group is arranged between the first clamping hole group and the second clamping hole group.

[0007] In one embodiment, the first clamping hole group includes a plurality of first clamping holes, the second clamping hole group includes a plurality of second clamping holes, the third clamping hole group includes two third clamping holes, the central plane between the two third clamping holes is the mating surface, and the second clamping hole group and the first clamping hole group are symmetrically arranged along the mating surface.

[0008] In one embodiment, the first clamping holes and the second clamping holes respectively extend obliquely downward in the left and right directions.

[0009] In one embodiment, the third clamping hole extends vertically downward.

[0010] In one embodiment, two clamping edges are provided at positions near the upper and lower edges on the front side of the position adjusting plate, horizontal extending clamping grooves are provided on the clamping edges, the clamping grooves of the two clamping edges are oppositely arranged in the vertical direction, and the writing board is clamped into the clamping grooves of the two clamping edges from one side.

[0011] In one embodiment, the clamping plate is arranged between the support arm body and the handle.

[0012] In one embodiment, the linkage seat includes a mounting plate, a guiding part arranged behind the mounting plate, a connecting plate connecting the mounting plate and the guiding part, a guiding hole is provided on the guiding part, the guiding hole penetrates through the guiding part in the vertical direction, and the first guide rod passes through the guiding hole of the guiding part of the linkage seat.

[0013] In one embodiment, the linkage seat further includes auxiliary plates connected to both sides of the guiding part, the support arm assembly further includes positioning parts, and the positioning parts of the support arm assembly pass through the support arm body and are installed on the auxiliary plates.

[0014] In one embodiment, positioning holes are provided at the corners of the mounting plate, and the height-adjustable teaching aid further includes a plurality of fixing parts, and the fixing parts pass through the positioning holes of the mounting plate and are fixed on the position adjusting plate.

[0015] The beneficial effects of the height-adjustable teaching aid of the present utility model are as follows: by arranging a first clamping hole group, a second clamping hole group and a third clamping hole group on the clamping plate, and arranging two support arm assemblies, one end of the support arm body is movably installed on the linkage seat, by adjusting the angles of the support arm bodies of the two support arm assemblies, the height of the linkage seat and the writing board is further adjusted. After the height adjustment is completed, when the support arm assembly supports the linkage seat, the third clamping hole group limits the clamping strips on the two support arm assemblies, or the first clamping hole group and the second clamping hole group limit the clamping strips on the two support arm assemblies, so as to realize that the height of the writing board can be quickly adjusted. The whole operation process is simple, the operation is convenient, and the convenience of using the teaching aid is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figures 1 to 2 are structural schematic diagrams of the height-adjustable teaching aid of the present utility model in different directions;

[0017] Figure 3 is a rear view of the clamping plate and the support plate of the height-adjustable teaching aid of the present utility model;

[0018] Figure 4This is a schematic structural diagram when the support arm assembly of the height-adjustable teaching aid of the present utility model is cooperatively installed with the linkage seat. Detailed implementation manners

[0019] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation manners of the present utility model with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0020] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are 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 thus should not be construed as a limitation of the present utility model.

[0021] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0022] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. 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.

[0023] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or 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 may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation.

[0025] Please refer to Figures 1 to 4 , the present utility model provides a height-adjustable teaching aid, which includes a chassis 10, a first guide rod 60 and a second guide rod 70 vertically installed on the chassis 10, a linkage seat 20 slidably disposed on the first guide rod 60, an adjustment plate 40 installed on the linkage seat 20 and cooperatively installed with the first guide rod 60 and the second guide rod 70, a writing board 50 installed on the adjustment plate 40, and two support arm assemblies 30 disposed between the linkage seat 20 and the chassis 10. The support arm assemblies 30 cooperate with the chassis 10 to support the adjustment plate 40, and the support arm assemblies 30 can be adjusted in position according to the use height of the writing board 50. The writing board 50 can be freely disassembled and assembled on the adjustment plate 40.

[0026] The chassis 10 includes two support feet 11, a support plate 12 installed on the two support feet 11, and a clamping plate 13 installed on the support plate 12. The clamping plate 13 is provided with an adjustment hole 14 extending in the horizontal direction. The adjustment hole 14 penetrates the clamping plate 13 in the front-rear direction. The bottom hole wall of the adjustment hole 14 is a mating surface. The clamping plate 13 is provided with a first clamping hole group 15, a second clamping hole group 16, and a third clamping hole group 17 extending inward on the mating surface. The third clamping hole group 17 is arranged between the first clamping hole group 15 and the second clamping hole group 16. The first clamping hole group 15 includes a plurality of first clamping holes 151, and the first clamping holes 151 are evenly spaced. The second clamping hole group 16 includes a plurality of second clamping holes 161, and the second clamping holes 161 are also evenly spaced. The third clamping hole group 17 includes two third clamping holes 171. The central plane between the two third clamping holes 171 is the mating surface. The second clamping hole group 16 and the first clamping hole group 15 are mirror-symmetric along the mating surface. The first clamping holes 151 and the second clamping holes 161 respectively extend obliquely downward in the left and right directions. The two third clamping holes 171 extend vertically downward.

[0027] The first guide rod 60 and the second guide rod 70 are installed on the support plate 12. In this embodiment, the number of the first guide rods 60 is one, and the number of the second guide rods 70 is two. The first guide rod 60 is arranged between the two second guide rods 70. Limiting blocks (61, 71) are provided at the top positions of the first guide rod 60 and the second guide rod 70. The central axis of the first guide rod 60 is arranged on the path of the mating surface.

[0028] The linkage seat 20 includes a mounting plate 22, a guiding part 21 arranged behind the mounting plate 22, a connecting plate 23 connecting the mounting plate 22 and the guiding part 21, and auxiliary plates 24 connected to both sides of the guiding part 21. Positioning holes 221 are provided at the corners of the mounting plate 22. A guiding hole 211 is provided on the guiding part 21. The guiding hole 211 penetrates the guiding part 21 in the vertical direction.

[0029] In this embodiment, the number of the support arm assemblies 30 is two. Each support arm assembly 30 includes a positioning member 32, a support arm body 31, a clamping strip 33, and a handle 34. The support arm body 31 is arranged in a long sheet shape. The clamping strip 33 is vertically connected to one end of the support arm body 31. An adjustment hole 14 is provided at the end of the support arm body 31 away from the clamping strip 33. In this embodiment, the positioning member 32 is a screw, and the handle 34 is installed at the end of the clamping strip 33.

[0030] Two clamping edges 41 are provided at the upper and lower edge positions on the front side of the adjustment plate 40. A horizontally extending clamping groove 42 is provided on the clamping edge 41. The clamping grooves 42 of the two clamping edges 41 are arranged opposite to each other in the vertical direction. And, two clamping rings 43 are provided on the back of the adjustment plate 40.

[0031] During assembly, the first guide rod 60 passes through the guide hole 211 of the guide portion 21 of the linkage seat 20 and is installed and fixed on the support plate 12. The second guide rod 70 passes through the snap ring 43 of the adjustment plate 40 and is installed and fixed on the support plate 12. The mounting plate 22 of the linkage seat 20 is attached to the back surface of the adjustment plate 40. The present utility model further includes a plurality of fixing members, and the fixing members pass through the positioning holes 221 of the mounting plate 22 and are fixed on the adjustment plate 40, so as to install and fix the support plate 12 and the linkage seat 20. The two support arm assemblies 30 are correspondingly installed in cooperation with the two auxiliary plates 24. The positioning member 32 of the support arm assembly 30 passes through the adjustment hole 14 of the support arm body 31 and is installed on the auxiliary plate 24. The support arm body 31 can rotate around the positioning member 32. The clamping strip 33 of the support arm assembly 30 passes through the adjustment hole 14, and the clamping plate 13 is arranged between the support arm body 31 and the handle 34. The writing board 50 is snapped into the card slots 42 of the two card edges 41 from one side.

[0032] When the support arm assemblies 30 support the linkage seat 20, the clamping strips 33 on the two support arm assemblies 30 are respectively clamped in the symmetrically arranged first clamping holes 151 and second clamping holes 161, or the clamping strips 33 on the two support arm assemblies 30 are respectively clamped in the two third clamping holes 171. When the height of the linkage seat 20 needs to be adjusted, lift the linkage seat 20 or press the handles 34 of the two support arm assemblies 30 inward. First, withdraw the clamping strips 33 from the first clamping holes 151 and second clamping holes 161 (or the two third clamping holes 171), so that the clamping strips 33 move into the adjustment holes 14, and then adjust the angles of the two support arm bodies 31. When the height of the writing board 50 is adjusted to the height of the required gear, then clamp the clamping strips 33 in the corresponding gear first clamping holes 151 and second clamping holes 161 (or the two third clamping holes 171).

[0033] The beneficial effects of the height-adjustable teaching aid of the present utility model are as follows: By providing a first clamping hole group 15, a second clamping hole group 16 and a third clamping hole group 17 on the clamping plate 13, and providing two support arm assemblies 30, one end of the support arm body 31 is movably installed on the linkage seat 20. By adjusting the angles of the support arm bodies 31 of the two support arm assemblies 30, the height of the linkage seat 20 and the writing board 50 is further adjusted. After the height adjustment is completed, when the support arm assemblies 30 support the linkage seat 20, the third clamping hole group 17 limits the clamping strips 33 on the two support arm assemblies 30, or the first clamping hole group 15 and the second clamping hole group 16 limit the clamping strips 33 on the two support arm assemblies 30, so as to realize that the height of the writing board 50 can be quickly adjusted. The whole operation process is simple, the operation is convenient, and the convenience of using the teaching aid is effectively improved.

[0034] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0035] The above-described embodiments merely represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several variations and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A height-adjustable teaching aid, characterized in that: The camming plate is a vertically disposed upper portion of the camming plate, and the camming plate is a vertically disposed upper portion of the camming plate. The camming plate is a horizontally disposed upper portion of the camming plate, and the camming plate is a horizontally disposed upper portion of the camming plate. The camming plate is a horizontally disposed upper portion of the camming plate, and the camming plate is a horizontally disposed upper portion of the camming plate. The camming plate is a horizontally disposed upper portion of the camming plate, and the camming plate is a horizontally disposed upper portion of the camming plate. The camming plate is a horizontally disposed upper portion of the camming plate, and the camming plate is a horizontally disposed upper portion of the camming plate. The camming plate is a horizontally disposed upper portion of the camming plate, and the camming plate is a horizontally disposed upper portion of the camming plate. The camming plate is a horizontally disposed upper portion of the camming plate, and the camming plate is a horizontally disposed upper portion of the camming plate. The camming plate is a horizontally disposed upper portion of the camming plate, and the camming plate is a horizontally disposed upper portion of the camming plate. The camming plate is a horizontally disposed upper portion of the camming plate. The camming plate is a horizontally disposed upper portion of the camming plate. The camming plate is a horizontally disposed upper portion of the camming plate. The camming plate is a horizontally disposed upper portion of the camming plate.

2. The height-adjustable teaching aid according to claim 1, characterized in that: The third locking hole group is arranged between the first locking hole group and the second locking hole group.

3. The height-adjustable teaching aid according to claim 2, characterized in that: The first positioning hole group includes a plurality of first positioning holes, the second positioning hole group includes a plurality of second positioning holes, the third positioning hole group includes two third positioning holes, the center plane between the two third positioning holes is the mating surface, and the second positioning hole group and the first positioning hole group are arranged in mirror symmetry along the mating surface.

4. The height-adjustable teaching aid according to claim 3, characterized in that: The first locking hole and the second locking hole extend obliquely downward toward left and right sides respectively.

5. The height-adjustable teaching aid according to claim 3, characterized in that: The third locking hole extends downward in a vertical direction.

6. The height-adjustable teaching aid according to claim 1, characterized in that: The front side of the adjustment plate is provided with two clamping edges near the upper and lower edges, and the clamping edges are provided with horizontally extending clamping slots. The clamping slots of the two clamping edges are arranged opposite to each other in the vertical direction, and the handwriting board is clamped to the clamping slots of the two clamping edges from one side.

7. The height-adjustable teaching aid according to claim 1, characterized in that: The positioning plate is arranged between the support arm body and the handle.

8. The height-adjustable teaching aid according to claim 1, characterized in that: The linkage seat includes a mounting plate, a guide portion arranged behind the mounting plate, and a connecting plate connecting the mounting plate and the guide portion. The guide portion is provided with a guide hole, which penetrates the guide portion in a vertical direction. The first guide rod passes through the guide hole of the guide portion of the linkage seat.

9. The height-adjustable teaching aid according to claim 8, characterized in that: The linkage seat also includes auxiliary plates connected to both sides of the guide part, and the support arm assembly also includes a positioning piece. The positioning piece of the support arm assembly passes through the support arm body and is installed on the auxiliary plate.

10. The height-adjustable teaching aid according to claim 8, characterized in that: Positioning holes are arranged on the corners of the mounting plate. The height-adjustable teaching aid further comprises a plurality of fixing members, which pass through the positioning holes of the mounting plate and are fixed on the adjustment plate.

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