CN210006303U

CN210006303U - Function curve simulator with kinds of variable scales

Info

Publication number: CN210006303U
Application number: CN201920731313.2U
Authority: CN
Inventors: 李军成
Original assignee: Hunan University of Humanities Science and Technology
Current assignee: Hunan University of Humanities Science and Technology
Priority date: 2019-05-21
Filing date: 2019-05-21
Publication date: 2020-01-31
Anticipated expiration: 2029-05-21

Abstract

The utility model discloses a function curve analogue means of kinds of variable scale, which comprises a body, be equipped with the demonstration platform on the body, be equipped with violently on the demonstration platform, ordinate and net, net intersection department is equipped with the jack, demonstration platform side is equipped with the roll-up mechanism, the roll-up mechanism includes the fixed axle, spiral spring and reel, spiral spring center is connected with the fixed axle, the excircle is connected with the reel, around having the demonstration rope on the reel, the demonstration rope passes through the bolt to be fixed on the demonstration platform, the bolt tip is equipped with the draw-in groove, be equipped with the arc arch on the draw-in groove inboard face, demonstration platform below, the side all is equipped with the slotted hole, be equipped with the polygon prism in the slotted hole, all be equipped with the scale on each cylinder of polygon prism, its end is connected with the thumb wheel through the pivot, the utility model aims at, provide the function curve analogue means of kinds of variable scale, the device is through pulling out and fixing the demonstration rope on the roll-up mechanism on the demonstration platform, form.

Description

Function curve simulator with kinds of variable scales

Technical Field

The utility model belongs to mathematics teaching aid field specifically is function curve analogue means of kinds of variable scales.

Background

The limit is an important component of the micro integral science in higher mathematics, and the difficulty of learning and teaching is that the limit belongs to the abstract science and the meaning is difficult to understand by imagination. The limit of the function is represented by infinitely approximating the value of the curve edge figure corresponding to the Y axis to the point to be solved on the X axis, or directly substituting the abscissa corresponding to the point to be solved into the function equation.

Teachers mainly describe or demonstrate multimedia courseware during teaching and students study through drawings, however, most teachers draw graphs on a blackboard manually, the drawing is too slow, the teaching progress is seriously affected, the demonstration is not vivid enough, and clear demonstration of the principle is difficult to achieve as a result.

SUMMERY OF THE UTILITY MODEL

The utility model aims at above problem, provide kinds of function curve analogue means of variable scale, the device is through pulling out and fixing the demonstration rope on the roll-up mechanism at the demonstration bench, forms the function image fast and demonstrates the limit, and its scale interval can adjust as required, easy operation, convenient to use.

In order to achieve the purpose, the utility model adopts the technical scheme that the -type function curve simulation device with variable scales comprises a body, wherein a demonstration table is arranged on the body, a grid with horizontal coordinates, vertical coordinates and criss-cross is arranged on the demonstration table, jacks are arranged at the intersection points of the grid, a winding mechanism is arranged on the side of the demonstration table, the winding mechanism comprises a fixed shaft, a spiral spring and a winding drum, the fixed shaft is fixedly connected with the body, the center of the spiral spring is connected with the fixed shaft, the outer circle of the spiral spring is connected with the winding drum, a demonstration rope is wound on the winding drum, the demonstration rope is fixed on the demonstration table through a bolt during demonstration, the bolt is matched with the jacks, a clamping groove is formed in the end part of the bolt, an arc-shaped protrusion is arranged on the inner side surface of the clamping groove, slotted holes are formed in the lower part and the side surfaces of the demonstration table, a plurality of prisms are arranged in the slotted holes, scales are arranged on each cylindrical surface of the.

, the demonstration rope end is wound on the circumference of the winding drum, the end is connected with a hook, and the demonstration table is provided with a hanging rod at the side far away from the winding mechanism.

, a storage box is arranged on the side surface of the body.

, a support seat is oppositely arranged at the bottom of the body.

, a handle is arranged on the top of the body.

, the limiting mechanism comprises a compression spring and a steel ball, the end of the compression spring is located in a counter bore on the side face of the body, the end of the compression spring is connected with the steel ball, an arc-shaped groove matched with the steel ball is formed in the side face of the thumb wheel, and a plurality of arc-shaped grooves are uniformly formed in the side face of the thumb wheel around the axis of the thumb wheel.

The utility model has the advantages that: the device is through pulling out and fixing the demonstration rope on the roll-up mechanism on the demonstration platform, forms the function image fast and demonstrates the limit, and its scale value can be adjusted as required, easy operation, convenient to use.

1. The utility model discloses well bolt tip is equipped with the draw-in groove, and it adopts micro-elastic materials such as plastics to make, breaks off with the hands when conveniently getting the demonstration rope, and the draw-in groove sets up a plurality ofly along bolt axis direction array, and mainly used separates the chucking to many demonstration ropes that carry out the demonstration simultaneously, prevents indiscriminate rope.

2. The fixing mechanism on the demonstration rope in the utility model can not be tightly attracted like a magnet mechanism.

3. The steel ball in this practicality is tight with the arc wall top under compression spring's effect to restriction thumb wheel, pivot, polygon prism rotate by oneself, however manual application of force can rotate the thumb wheel again, selects the prism face (scale) of needs up, convenient operation.

Drawings

Fig. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic sectional view of a-a in fig. 1 according to the present invention.

Fig. 3 is a schematic view of a part of the enlarged structure at B in fig. 1 according to the present invention.

Fig. 4 is a schematic view of the enlarged structure of the part C in fig. 1 according to the present invention.

Fig. 5 is a schematic side view of the plug of fig. 1 according to the present invention.

Fig. 6 is a schematic side view of the polygonal prism of fig. 1 according to the present invention.

The text labels in the figures are represented as: 1. a body; 2. a demonstration table; 3. a jack; 4. a fixed shaft; 5. a volute spring; 6. a reel; 7. a demonstration rope; 8. a bolt; 9. a card slot; 10. an arc-shaped bulge; 11. hooking; 12. a hanging rod; 13. a storage box; 14. a supporting seat; 15. a handle; 16. a long slot hole; 17. a polygonal prism; 18. a rotating shaft; 19. a thumb wheel; 20. a compression spring; 21. a steel ball; 22. an arc-shaped groove.

Detailed Description

In order to make the technical solution of the present invention better understood, the present invention is described in detail below with reference to the accompanying drawings, and the description of the present invention is only exemplary and explanatory, and should not be construed as limiting the scope of the present invention.

As shown in figures 1-6, the utility model has the specific structure that the function curve simulation device with variable scales comprises a body 1 and a shell made of plastic, a demonstration table 2 is arranged on the body 1, grids with abscissa X, ordinate Y and criss-cross are arranged on the demonstration table 2, a jack 3 is arranged at the intersection point of the grids, a furling mechanism is arranged at side of the demonstration table 2, the furling mechanism is provided with a plurality of grooves, which are the same as the tape measure structure and can demonstrate a plurality of curves simultaneously, the demonstration effect is better compared with the demonstration effect, the furling mechanism comprises a fixed shaft 4, a scroll spring 5 and a winding drum 6, the fixed shaft 4 is fixedly connected with the body 1, the center of the scroll spring 5 is connected with the fixed shaft 4, the excircle is connected with the winding drum 6 (the winding drum 6 is provided with a cavity for containing the scroll spring 5, the outer circular end of the scroll spring 5 is connected with the inner wall of the cavity), the winding rope 7 is wound on the winding drum 6, the demonstration rope 7 under the initial state, the winding of the winding drum 6, the demonstration rope 7 is tensioned, the demonstration rope 7 when the demonstration rope is fixed on the demonstration table 2 through a plug 8, the plug 8 is matched with the plug pin 3, the plug 8, the jack 3, the plug 8 is provided with the plug 8, the plug 8 is provided with the plug 5, the plug 8, the plug 2, the plug 8 is provided with the plug 2, the plug 2 is provided with the plug 2, the plug 2 is provided with the plug 2, the plug 2 is provided with the plug 2, the plug 2 is provided with the plug 2, the plug 2 is provided with the plug 2, the plug 2 is provided with the plug 2, the plug 20, the plug.

Preferably, the demonstration rope 7 is wound on the circumference of the winding drum 6 at one end, the hook 11 is connected to the other end , the hanging rod 12 is arranged on the side of the demonstration table 2 far away from the winding mechanism, and a plurality of hanging rods 12 are arranged.

Preferably, a storage box 13 is arranged on the side surface of the body 1. Used for containing the bolt 8 and is convenient to take and place.

Preferably, the bottom of the body 1 is provided with a support seat 14.

Preferably, a handle 15 is arranged at the top of the body 1. Is convenient to carry.

Preferably, the limiting mechanism comprises a compression spring 20 and a steel ball 21, the end of the compression spring 20 is located in a counter bore on the side surface of the body 1, the end is connected with the steel ball 21, the side surface of the thumb wheel 19 is provided with an arc-shaped groove 22 matched with the steel ball 21, the arc-shaped groove 22 is uniformly arranged on the side surface of the thumb wheel 19 around the axis, the steel ball 21 is tightly propped against the arc-shaped groove 22 under the action of the compression spring 20, so that the thumb wheel 19, the rotating shaft 18 and the polygonal column 17 are limited to rotate automatically, however, the thumb wheel 19 can be rotated by manual force application, the required prism surface (scale) is selected to be upward, and the operation is convenient.

During the specific use, manual drawing-out of demonstration rope 7 from the roll-up mechanism, as shown in fig. 1, 3, reel 6 anticlockwise rotates, its tip is fixed in demonstration platform 2 side, then according to the value of asking function abscissa to correspond the ordinate, manual rotation thumb wheel 19 drives pivot 18, polygon 17 and rotates, makes the scale on polygon 17 up, and the scale value on every prism face is all different, after selecting the scale of suitable proportion, comes demonstration function if: y = f (x) x, x =1, f (1) 1; x =2, f (2) ═ 2; x =3, f (3) ═ 3; … …, when demonstrating the infinite function of f (x) 1/x, the value on the abscissa should be gradually adjusted, i.e. the dial wheel 19 is rotated to adjust, and the value is gradually enlarged, then when x approaches infinity, y approaches 0, y = f (x) is the limit of x approaching infinity is equal to 0, and the demonstration is obtained. The demonstration rope is inserted into the jack 3 of the corresponding point through the bolt 8, the demonstration rope 7 is clamped into the clamping groove 9, a curve is generated rapidly, the value on the corresponding Y axis is rounded off, and the clamping grooves are arranged and used for conducting split clamping when a plurality of demonstration ropes 7 which conduct demonstration (contrast function change) simultaneously share the same point, so that rope disorder is prevented, and the demonstration ropes can be taken and placed well; when the demonstration rope 7 is not used, the scroll spring 5 drives the winding drum 6 to rotate clockwise under the action of the elastic force, and then the demonstration rope 7 is wound without manual winding, so that the demonstration rope is very convenient; in addition, the elasticity provided by the spiral spring 5 enables the demonstration rope 7 to be in a tensioned state during demonstration.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises the series of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The principles and embodiments of the present invention have been explained herein using specific examples, which are presented only to assist in understanding the methods and their core concepts. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes can be made without departing from the principle of the present invention, and the above technical features can be combined in a proper manner; the application of these modifications, variations or combinations, or the application of the concepts and solutions of the present invention in other contexts without modification, is not intended to be considered as a limitation of the present invention.

Claims

The function curve simulation device with variable scales comprises a body (1) and is characterized in that a demonstration table (2) is arranged on the body (1), a grid with horizontal coordinates, vertical coordinates and criss-cross is arranged on the demonstration table (2), jacks (3) are arranged at intersection points of the grids, a winding mechanism is arranged on the side of the demonstration table (2) and comprises a fixed shaft (4), a spiral spring (5) and a winding drum (6), the fixed shaft (4) is fixedly connected with the body (1), the center of the spiral spring (5) is connected with the fixed shaft (4), an outer circle is connected with the winding drum (6), a demonstration rope (7) is wound on the winding drum (6), the demonstration rope (7) is fixed on the demonstration table (2) through a plug pin (8) during demonstration, the plug pin (8) is matched with the jacks (3), a clamping groove (9) is arranged at the end portion of the plug pin (8), an arc-shaped protrusion (10) is arranged on the inner side face of the clamping groove (9), a slotted hole (16) is formed in the lower portion and in the side face of the demonstration table (2), a plurality of the long body (17) is provided with a plurality of dial bodies (17), and a plurality of dial wheels (18) are connected with limiting mechanisms (19) through limiting side faces of the prism wheels (18) which are arranged on the prism.
2. kinds of function curve simulation device of variable scale, according to claim 1, characterized in that, the demonstration rope (7) end is wound on the circumference of the reel (6), the other end is connected with the hook (11), the demonstration table (2) is provided with the hanging rod (12) far away from the side of the winding mechanism.
3. kinds of function curve simulation device of variable scale, according to claim 1, characterized in that, the body (1) is provided with a storage box (13) on its side.
4. kinds of function curve simulation device of variable scale, according to claim 1, characterized in that the bottom of the body (1) is oppositely provided with a support seat (14).
5. kinds of function curve simulation device of variable scale, according to claim 1, characterized in that the body (1) is provided with a handle (15) on the top.
6. kinds of function curve simulation device of variable scale according to claim 1, wherein, the limiting mechanism includes compression spring (20) and steel ball (21), the end of the compression spring (20) locates in the counter bore of the side of the body (1), another connects the steel ball (21), the side of the thumb wheel (19) has arc groove (22) matching with the steel ball (21), the arc groove (22) is set up a plurality of evenly around its axis on the side of the thumb wheel (19).