CN214410386U

CN214410386U - Teaching aid

Info

Publication number: CN214410386U
Application number: CN202120100683.3U
Authority: CN
Inventors: 张滨; 张会敏; 张宇; 高梦妍
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-14
Filing date: 2021-01-14
Publication date: 2021-10-15
Anticipated expiration: 2031-01-14

Abstract

The utility model discloses a teaching aid, which is used for assisting in drawing circles and measuring the radian of circles, and comprises a first teaching board and a second teaching board which are symmetrically arranged, wherein scales are arranged on the circumferential surface of the outer side of the first teaching board and the second teaching board at equal intervals, the first teaching board and the second teaching board are connected through a detachably arranged fixer, wherein, the two sides of the symmetry line of the first teaching board and the second teaching board are respectively provided with a first concave hole and a second concave hole, the first concave hole corresponds to the second concave hole one by one, and the connection line of the first concave hole and the second concave hole is designed to be perpendicular to the symmetry line; one side of the fixer is provided with a fixing bulge matched with the first concave hole and the second concave hole for fixing, and the other side of the fixer is provided with a fixing handle. Compared with the prior art, the teaching aid is convenient to carry and use.

Description

Teaching aid

Technical Field

The utility model particularly relates to a teaching aid.

Background

The protractors for teaching are mostly integrated, and have larger volume, so the protractors are inconvenient to carry and use.

How to provide a simple structure, convenient to carry's teaching aid is the problem that will solve at present.

Disclosure of Invention

The utility model aims at providing an energy-conserving hanging water heater of simple structure, fault rate are lower, safer and more reliable.

In order to achieve the above object, the utility model provides a following technical scheme:

a teaching aid is used for assisting in drawing circles and measuring the radian of circles and comprises a first teaching board and a second teaching board which are symmetrically arranged, scales are arranged at equal intervals along the circumferential surfaces of the outer sides of the first teaching board and the second teaching board, the first teaching board and the second teaching board are connected through a detachably arranged fixer, first concave holes and second concave holes are respectively arranged on two sides of the symmetry line of the first teaching board and the second teaching board, the first concave holes correspond to the second concave holes in a one-to-one mode, and the connection line of the first concave holes and the second concave holes is perpendicular to the symmetry line; one side of the fixer is provided with a fixing bulge matched with the first concave hole and the second concave hole for fixing, and the other side of the fixer is provided with a fixing handle. Further, the first teaching board and the second teaching board are quarter round plates respectively, and open channels are arranged on the surfaces of the quarter round plates. Further, the surfaces of the first teaching board and the second teaching board that contact each other are smooth. Furthermore, friction strips are arranged on the surfaces of the first teaching board and the second teaching board, which are far away from the scales. Further, the friction strips are respectively attached to the first teaching board and the second teaching board, and are connected with the first teaching board and the second teaching board through bonding agents. Further, the friction strip comprises a first friction belt and a second friction belt, and the surfaces of the first friction belt and the second friction belt are provided with a first wave-shaped stripe and a second wave-shaped stripe. Furthermore, the straightening direction of the first wavy stripe is perpendicular to the extending direction of the two ends of the symmetric line, and the straightening direction of the second wavy stripe is parallel to the extending direction of the two ends of the symmetric line. Further, the fixer still contains the fixed plate, the appearance of fixed plate is the cuboid structure, and the chamfer all around is the circular arc chamfer. Further, fixed arch is the cylinder, and with first shrinkage pool is close to the near-end and is the frustum structure, and follows frustum circumference is equipped with to the first concave part of frustum center recessed, fixed arch one end with the fixed plate passes through threaded connection. Further, the scale comprises scale marks and angle identification numbers, fluorescent layers are arranged on the surfaces of the scale marks and the angle identification numbers, and the fluorescent layers are connected with the first teaching board and the second teaching board through bonding agents.

Compared with the prior art, the beneficial effects of the utility model are that:

owing to contain first teaching board and the second teaching board that the symmetry set up, follow first teaching board with the outside circumference surface equidistance of second teaching board is equipped with the scale, just first teaching board with the second teaching board is connected through the fixer that can dismantle the setting, and, first teaching board with the both sides of second teaching board symmetry line are equipped with first shrinkage pool and second shrinkage pool respectively, consequently use through the cooperation of fixer and first shrinkage pool and second shrinkage pool to can open first teaching board and second teaching board and fold, can be folding it when not using, thereby realize convenient to carry.

Drawings

FIG. 1 is a front view of the teaching aid of the present invention;

FIG. 2 is a rear view of the teaching aid of the present invention;

fig. 3 is a structure of the fixing plate of the present invention;

fig. 4 is a structure of the fixing plate of the present invention;

fig. 5 is a structural diagram of the frustum structure and the first concave portion of the present invention.

Description of reference numerals:

1 first teaching board 2 second teaching board 3 fixer 4 first shrinkage pool 5 second shrinkage pool 6 fixed protrusion 7 fixed handle 8 first friction area 9 second friction area 10 first wave stripe 11 second wave stripe 12 fixed 13 scale mark 14 angle identification number 15 open channel 16 frustum structure 17 first concave part.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the spirit of the present invention will be described in detail with reference to the accompanying drawings, and any person skilled in the art can change or modify the techniques taught by the present invention without departing from the spirit and scope of the present invention after understanding the embodiments of the present invention.

The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention. Additionally, the same or similar numbered elements/components used in the drawings and the embodiments are used to represent the same or similar parts.

As used herein, the terms "first," "second," …, etc. do not denote any order or sequential importance, nor are they used to limit the invention, but rather are used to distinguish one element from another or from another element or operation described in the same technical language.

With respect to directional terminology used herein, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology used is intended to be illustrative and is not intended to be limiting of the present teachings.

As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.

As used herein, "and/or" includes any and all combinations of the described items.

As used herein, the terms "substantially", "about" and the like are used to modify any slight variation in quantity or error that does not alter the nature of the variation. Generally, the range of slight variations or errors modified by such terms may be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. It should be understood by those skilled in the art that the aforementioned values can be adjusted according to actual needs, and are not limited thereto.

Certain words used to describe the present application are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the present application.

The embodiment of the utility model provides a teaching aid, as shown in fig. 1 and 2, be used for the supplementary radian of drawing a circle and measuring a circle, include first teaching board 1 and second teaching board 2 that the symmetry set up, along the equidistant scale that is equipped with of outside circumference surface of first teaching board 1 with second teaching board 2, and first teaching board with the second teaching board is connected through the fixer 3 that can dismantle the setting, wherein, lie in first teaching board 1 with the both sides of second teaching board 3 symmetry line are equipped with first shrinkage pool 4 and second shrinkage pool 5 respectively, first shrinkage pool 4 with second shrinkage pool 5 one-to-one, and the first shrinkage pool 4 with the second shrinkage pool 5 line with the symmetry line mutually perpendicular design; one side of the fixer is provided with a fixed bulge 6 matched with the first concave hole 4 and the second concave hole 5 for fixing, and the other side of the fixer is provided with a fixed handle 7.

Specific speaking, owing to contain first teaching board 1 and the second teaching board 2 that the symmetry set up, follow first teaching board 1 with the outside circumference surface equidistance of second teaching board 2 is equipped with the scale, just first teaching board 1 with second teaching board 2 is connected through the fixer 3 that can dismantle the setting, and, first teaching board 1 with the both sides of the 3 symmetry lines of second teaching board are equipped with first shrinkage pool 4 and second shrinkage pool 5 respectively, consequently use through the cooperation of fixer with first shrinkage pool 4 and second shrinkage pool 5 to can open and fold first teaching board 1 and second teaching board 2, can be folding it when not using, thereby realize convenient to carry, thereby conveniently take off and install through the handle 7 that sets up, use convenience more.

It is worth mentioning that the first teaching board 1 and the second teaching board 2 are quarter circular boards respectively, and the surfaces thereof are provided with open channels 15, and the surfaces of the first teaching board 1 and the second teaching board 2 which are in contact with each other are smooth, so that the use is convenient. In the in-service use, for example will the utility model discloses a teaching aid is when placing on the blackboard, through first teaching board 1 with second teaching board 2 is kept away from scale side surface is equipped with the friction strip, and the friction between increase and the blackboard reduces and slides convenient to use.

Specifically, in the present embodiment, the friction strips are respectively attached to the first teaching board 1 and the second teaching board 2, and are connected to the first teaching board 1 and the second teaching board 2 by an adhesive, so that the friction strips are tightly connected to each other, and the friction strips are prevented from falling off. In order to increase the friction area, the number of friction strips may be increased, for example, comprising a first friction strip 8 and a second friction strip 9. Further, can also with first friction area 8 with 9 surfaces in second friction area are equipped with first wave form stripe 10 and second wave form stripe 11 to increase the area of contact of friction strip and blackboard, and then increase frictional force, reduce the utility model discloses a phenomenon of skidding appears in the teaching aid. In order to increase friction area, prevent to appear sliding, for example, will first wave form stripe draw 10 straight direction with symmetry line both ends extending direction is perpendicular, second wave form stripe 11 draw straight direction with symmetry line both ends extending direction is parallel, and the setting of whole wave form stripe reduces the utility model discloses a teaching aid's slip, and then the person of facilitating the use draws the circle, helps the teaching. In the present embodiment, as shown in fig. 3 and 4, the fixing device 3 further includes a fixing plate 12, and in order to stabilize the structure of the fixing plate 12, for example, the fixing plate 12 has a rectangular parallelepiped shape. In order to prevent a user from being scratched by the fixing plate 12 during use, for example, the peripheral chamfer of the fixing plate 12 is set to be a circular-arc chamfer. The fixing plate 12 may have a square shape. It should be noted that, as shown in fig. 5, the fixing protrusion 6 is a cylinder, for convenience of installation, the fixing protrusion and the near end of the first concave hole 4 are in a frustum structure, for convenience of fixing the frustum structure and the first concave hole 4, for example, a first concave portion concave toward the center of the frustum is arranged along the circumferential direction of the frustum, and a fixing structure matching with the frustum structure 16 is arranged on the inner wall of the first concave hole, for example, the fixing structure is used for limiting the frustum structure 16, and when the frustum structure is matched with the fixing structure, the frustum structure is prevented from being separated from the inner side of the first concave hole 4, and it is ensured that the frustum structure and the first concave hole are tightly connected. In order to connect the fixing protrusion 6 and the fixing plate 12 tightly and firmly, for example, one end of the fixing protrusion 6 is screwed with the fixing plate 12. In addition, the scale comprises scale marks 13 and angle identification numbers 14, and in order to be seen by students far away from the blackboard when the light is weak, for example, the surfaces of the scale marks and the angle identification numbers are provided with fluorescent layers. In order to fix the phosphor layer firmly and prevent it from falling off, for example, the phosphor layer is connected to the first teaching board and the second teaching board by an adhesive.

The foregoing is only an illustrative embodiment of the present invention, and any equivalent changes and modifications made by those skilled in the art without departing from the spirit and principles of the present invention should fall within the protection scope of the present invention.

Claims

1. A teaching tool is used for assisting in drawing circles and measuring the radian of the circles and is characterized by comprising a first teaching board and a second teaching board which are symmetrically arranged, scales are arranged on the circumferential surfaces of the outer sides of the first teaching board and the second teaching board at equal intervals, the first teaching board and the second teaching board are connected through a detachably arranged fixer, first concave holes and second concave holes are respectively arranged on two sides of the symmetry line of the first teaching board and the second teaching board, the first concave holes correspond to the second concave holes in a one-to-one mode, and the connection line of the first concave holes and the second concave holes is perpendicular to the symmetry line; one side of the fixer is provided with a fixing bulge matched with the first concave hole and the second concave hole for fixing, and the other side of the fixer is provided with a fixing handle.

2. The teaching aid of claim 1 wherein the first teaching board and the second teaching board are quarter circular plates each having an open channel formed in a surface thereof.

3. The teaching aid as claimed in claim 1, wherein the surfaces of the first teaching board and the second teaching board which contact each other are smooth.

4. The teaching aid as claimed in claim 1, wherein the first teaching board and the second teaching board are provided with a friction strip on a side surface away from the scale.

5. The teaching tool as claimed in claim 4, wherein the friction strips are closely attached to the first teaching board and the second teaching board, respectively, and are connected to the first teaching board and the second teaching board by an adhesive.

6. The educational material of claim 5, wherein the rubbing strip comprises a first rubbing strip and a second rubbing strip, and the first rubbing strip and the second rubbing strip are provided with a first wave-shaped stripe and a second wave-shaped stripe on the surface.

7. The teaching aid as claimed in claim 6, wherein the first wavy stripe is straightened in a direction perpendicular to the direction in which the two ends of the line of symmetry extend, and the second wavy stripe is straightened in a direction parallel to the direction in which the two ends of the line of symmetry extend.

8. The teaching aid as claimed in claim 1, wherein the fixer further comprises a fixing plate, the fixing plate is of a cuboid structure, and the peripheral chamfer is a circular arc chamfer.

9. The teaching aid as claimed in claim 8, wherein the fixing protrusion is a cylinder, the end of the fixing protrusion close to the first concave hole is of a frustum structure, a first concave portion concave downward to the center of the frustum is arranged along the circumference of the frustum, and one end of the fixing protrusion is connected with the fixing plate through threads.

10. The teaching aid of claim 1 wherein said scale comprises scale marks and angle indicating numbers, said scale marks and said angle indicating numbers being surfaced with a fluorescent layer, said fluorescent layer being attached to said first teaching board and said second teaching board by an adhesive.