CN210836738U

CN210836738U - Advanced mathematics teaching presentation device

Info

Publication number: CN210836738U
Application number: CN201921032119.1U
Authority: CN
Inventors: 赵芳芳; 高会鲜
Original assignee: Wuhan Institute of Shipbuilding Technology
Current assignee: Wuhan Institute of Shipbuilding Technology
Priority date: 2019-07-04
Filing date: 2019-07-04
Publication date: 2020-06-23
Anticipated expiration: 2029-07-04

Abstract

The utility model belongs to the technical field of teaching demonstration tools, a higher mathematics teaching demonstration device is disclosed, which is provided with a fixed frame, wherein both ends of the surface of the fixed frame are fixed with longitudinal adjusting slideways through rivets, the surfaces of the adjusting slideways on both sides are all connected with a chain fixed frame in a sliding way, and the bottom end of the chain fixed frame is fixed with a chain through a runner; the lower end of the chain fixing frame is provided with a lower rack, two ends of the lower rack are in sliding connection with the adjusting slide ways on two sides, and a gear plate is engaged between the lower rack and the upper end chain; the gear disc is penetrated with a painting brush fixer. The utility model can clamp the chalk or the painting brush through the painting brush fixer, and can carry out drawing on the blackboard or the paper; the pushing device can ensure that the chalk is fully contacted with the blackboard, so that the gear disc can make a continuous and smooth motion track. Teacher, student can utilize this device to carry out actual demonstration to the cycloid orbit, through in person's operation, make the student can audio-visual observation and experience the motion trail of cycloid, more be favorable to the student to understand the curvilinear equation.

Description

Advanced mathematics teaching presentation device

Technical Field

The utility model belongs to the technical field of the teaching presentation instrument, especially, relate to an advanced math teaching presentation device.

Background

Currently, the closest prior art in the industry:

in mathematical teaching, it is defined as the locus formed by a point on the boundary of a circle when the circle moves along a straight line, and it is one of the general cycloids. In the traditional mathematical teaching, teachers mostly help students to understand through video animation, although the method is more helpful for the students to understand compared with the prior manual plane drawing, some students still cannot intuitively and thoroughly understand cycloid tracks, and the cycloid curve with smooth and vivid lines cannot be drawn through manual drawing on a blackboard or drawing paper, so that the understanding difficulty of the students is increased, and the actually operated cycloid movement is more helpful for the students to understand the cycloid stroke.

In summary, the problems of the prior art are as follows:

(1) the cycloid locus can not be intuitively and thoroughly understood through video animation teaching in the mathematical teaching;

(2) when the curve is drawn manually on a blackboard or drawing paper, the curve cannot be drawn into a smooth and vivid cycloid curve, so that the understanding difficulty of students is increased.

Disclosure of Invention

To the problem that prior art exists, the utility model provides an advanced mathematics teaching presentation device.

The utility model discloses a realize like this, an advanced mathematics teaching presentation device is provided with:

a fixing frame;

longitudinal adjusting slideways are fixed at two ends of the surface of the fixing frame through rivets, chain fixing frames are connected to the surfaces of the adjusting slideways at two sides in a sliding mode, and chains are fixed at the bottom ends of the chain fixing frames through rotating wheels;

the lower end of the chain fixing frame is provided with a lower rack, two ends of the lower rack are connected with the adjusting slide ways on two sides in a sliding mode, the upper end of the lower rack is provided with sawteeth, a gear disc is meshed between the lower rack and the upper end chain, and the outer side of the gear disc is fixed with a rotating handle through a hinge shaft;

the gear dish runs through there is the painting brush fixer, the painting brush fixer is provided with a solid fixed cylinder, the inside outer end of solid fixed cylinder is fixed with miniature electric telescopic handle, miniature electric telescopic handle inboard is connected with the push rod, the push rod welds with the inside push plate that bulldozes of solid fixed cylinder.

The utility model can clamp chalks or paintbrushes through the painting brush fixer, can drive the painting brush fixer to rotate through manually rotating the gear disc, carries out drawing on a blackboard or paper, and can transmit drawings to students for close-range observation; the pushing device can ensure that the chalk is fully contacted with the blackboard or paper, so that the gear disc can make a continuous and smooth motion track. Teacher, student can utilize this device to carry out actual demonstration to the cycloid orbit, through in person's operation, make the student can audio-visual observation and experience the motion trail of cycloid, more be favorable to the student to understand the curvilinear equation.

Furthermore, adjusting bolts are fixed at the two ends of the chain fixing frame and the lower rack through threads.

The utility model discloses can adjust suitable high back at the fixed frame of chain and lower rack, through the regulation slide fixed connection at adjusting bolt and both ends, take place to remove when preventing to use.

Further, the fixed frame back has a plurality of sucking discs through the bolt fastening, fixed frame back upper left corner and lower right corner pin joint have the clip.

The utility model discloses a convenient fixed frame of sucking disc adsorbs on the blackboard surface, can conveniently carry out the centre gripping to the drawing paper through the clip fixed.

Furthermore, the front end of the pushing plate is connected with a pressure sensor in a pin mode, the outer side of the gear disc is fixedly provided with a controller through screws, and the controller is electrically connected with the pressure sensor and the miniature electric telescopic rod.

The utility model discloses a pressure sensor can detect the pressure between painting brush and propelling movement board to transmit the testing result to the controller, the controller is controlled stretching out and drawing back of painting brush through miniature electric telescopic handle.

Further, the fixing frame is divided into a left part and a right part, and hinges are fixed between the upper frame and the lower frame of the left part and the right part through screws.

The utility model discloses a hinge can be folded the left and right sides two parts of fixed frame, and convenient the accomodating is carried.

Drawings

FIG. 1 is the embodiment of the utility model provides an equal mathematics teaching demonstration device overall structure sketch map

Fig. 2 is a schematic view of a hinge structure provided by an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a brush holder according to an embodiment of the present invention; (ii) a

In the figure: 1. a fixed mount; 2. adjusting the slide way; 3. a fixing frame; 4. a chain fixing frame; 5. a chain; 6. a gear plate; 7. a brush holder; 71. a fixed cylinder; 8. rotating the handle; 9. a lower rack; 10. a hinge; 11. a clip; 12. chalk; 13. a pusher; 131. a push plate; 132. a push rod; 133. a miniature electric telescopic rod; 14. and adjusting the bolt.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.

The structure of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to fig. 3, the embodiment of the present invention provides an equal mathematics teaching demonstration device, which comprises: the painting brush fixing device comprises a fixing frame 1, an adjusting slide way 2, a fixing frame 3, a chain fixing frame 4, a chain 5, a gear disc 6, a painting brush fixing device 7, a fixing cylinder 71, a rotating handle 8, a lower rack 9, a hinge 10, a clamp 11, a chalk 12, a pushing device 13, a pushing plate 131, a pushing rod 132, a micro electric telescopic rod 133 and an adjusting bolt 14.

Example 1:

longitudinal adjusting slideways 2 are fixed at two ends of the surface of the fixing frame 3 through rivets, chain fixing frames 4 are connected to the surfaces of the adjusting slideways 2 at two sides in a sliding manner, and chains 5 are fixed at the bottom ends of the chain fixing frames 4 through rotating wheels; the lower end of the chain fixing frame 4 is provided with a lower rack 9, the two ends of the lower rack 9 are in sliding connection with the adjusting slide ways 2 on the two sides, the upper end of the lower rack 9 is provided with sawteeth, a gear disc 6 is meshed and connected between the lower rack 9 and the upper end chain 5, and the outer side of the gear disc 6 is fixed with a rotating handle 8 through a hinge shaft; gear plate 6 runs through and has painting brush fixer 7, and painting brush fixer 7 is provided with a fixed section of thick bamboo 71, and the inside outer end of a fixed section of thick bamboo 71 is fixed with miniature electric telescopic handle 133, and miniature electric telescopic handle 133 inboard is connected with push rod 132, and push rod 132 welds with the inside push plate 131 that pushes away of a fixed section of thick bamboo 71.

Example 2:

and adjusting bolts 14 are fixed at two ends of the chain fixing frame 4 and the lower rack 9 through threads.

Example 3:

the back of the fixed frame 3 is fixed with a plurality of suckers through bolts, and the upper left corner and the lower right corner of the back of the fixed frame 3 are pinned with clamps 11.

Example 4:

the front end of the pushing plate 131 is connected with a pressure sensor in a pin joint mode, the outer side of the gear disc 6 is fixed with a controller through screws, and the controller is electrically connected with the pressure sensor and the micro electric telescopic rod 133.

Further, the fixing frame 3 is divided into a left and right frame, and a hinge 10 is fixed between the upper and lower frames of the left and right frame by a screw.

The utility model discloses a theory of operation: when the utility model is used, the fixing frame 1 is fixed on the blackboard through the sucking disc, the chalk is inserted into the fixing cylinder 71, the chalk head is contacted with the blackboard surface, the pushing device 13 is fixed at the end of the painting box 7, the pushing rod 132 is driven by the micro electric telescopic rod 133 to drive the pushing plate 131 to reach the chalk end, at the moment, the pressure sensor senses the pressure with a certain limit, the pressure signal is transmitted to the controller through the wire, and the controller controls the micro electric telescopic rod 133 to stop working; fixing a lower rack 9 at the lower end of an adjusting slide way 2 through an adjusting bolt 14, clamping a gear disc 6 at the upper end of the left side of the lower rack 9, moving a chain fixing frame 4 downwards through the adjusting slide way 2, fixing two ends of the chain fixing frame 4 through the adjusting bolt 14, then shaking a rotating handle 8 to enable the gear disc 6 to move from left to right on the lower rack 9, meanwhile, matching the chain 5 with the gear disc 6 to rotate in the chain fixing frame 4 to ensure that the gear disc 6 moves smoothly on a rack track, chalk is consumed in the rotating process, reducing the pressure sensed by a pressure sensor, transmitting a pressure signal to a single chip microcomputer through a wire, then controlling a switch driver by the single chip microcomputer to enable a motor 133 to drive a push rod 132 to stretch forwards, enabling a push plate 131 to extrude the tail end of the chalk again, and ensuring that the chalk end is in. When a drawing is required on a sheet, the sheet is fixed by the clip 11, the white chalk is replaced by a color brush, and the above operation is repeated.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.

Claims

1. The utility model provides an advanced math teaching presentation device which characterized in that, advanced math teaching presentation device is provided with:

a fixing frame;

2. The advanced mathematics teaching demonstration device as claimed in claim 1, wherein said chain fixing frame and lower rack are fixed with adjusting bolts at both ends by screw threads.

3. The advanced mathematics teaching demonstration device as claimed in claim 1, wherein a plurality of suckers are fixed on the back of the fixed frame through bolts, and clamps are pinned on the upper left corner and the lower right corner of the back of the fixed frame.

4. The advanced math teaching demonstration device according to claim 1, wherein a pressure sensor is connected to the front end of the pushing plate in a pin joint manner, a controller is fixed to the outer side of the gear plate through screws, and the controller is electrically connected with the pressure sensor and the miniature electric telescopic rod.

5. The advanced mathematics teaching demonstration device as claimed in claim 1, wherein said fixed frame is divided into left and right parts, and hinges are fixed between upper and lower frames of the left and right parts by screws.