CN206331686U - A kind of College Maths parabola teaching demonstrating model - Google Patents

Abstract

The utility model discloses a demonstration model for university mathematics parabola teaching, which comprises a supporting horizontal plate, a rotating rod is arranged in the middle of the supporting horizontal plate through bearing rotation, and a plurality of supporting legs are arranged on the outer ring of the bottom of the supporting horizontal plate to support the horizontal plate. The lower side of the horizontal plate is provided with a turntable at the lower end of the rotating rod, the outer ring of the lower side of the rotating disk is rotated with a handle, the upper side of the supporting horizontal plate is provided with a telescopic rod at the upper end of the rotating rod, and the upper end of the telescopic rod is provided with a mounting seat. Sleeves are fixedly installed on the sleeve fixing grooves on the left and right sides of the sleeve, and a horizontal bar is provided for sliding in the sleeve. The end of the horizontal bar is provided with a card slot with an upper opening, and the two ends of the memory metal strip are correspondingly installed on the two horizontal bars. Inside the upper part of the installation base, there is a steel wire channel in the card slot. The utility model is easy to use, can use traditional steel wires for demonstration, and can use memory metal strips for more accurate demonstration, has rich functions, and is convenient for popularization and application.

Description

A Demonstration Model for Paraboloid Teaching in College Mathematics

technical field

The utility model relates to a teaching auxiliary device, in particular to a demonstration model for university mathematics parabola teaching.

Background technique

It is generally believed that advanced mathematics is a basic subject formed by calculus, more in-depth algebra, geometry and the intersecting content between them. University mathematics teaching includes special curved surfaces such as paraboloids. Paraboloids are widely used in lighting appliances such as car lights, flashlights, and radars. Their reflective surfaces or reflective surfaces are all paraboloids. The parabola is obtained by rotating 180° with its axis of symmetry as the axis. The surface of is a paraboloid.

There are no teaching aids to demonstrate the formation of paraboloids in the current mathematics teaching. Teachers can only complete the teaching of paraboloids through abstract concept explanations, or use traditional steel wire rotation for simple demonstrations of paraboloids, which is not conducive to students' understanding of paraboloids. inconvenient.

Utility model content

The purpose of this utility model is to provide a demonstration model for university mathematics paraboloid teaching, to solve the problems raised in the above-mentioned background technology.

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

A demonstration model for university mathematics paraboloid teaching, including supporting legs, supporting horizontal plates, telescopic rods, horizontal bars, sleeves, memory metal strips and mounting seats, the middle of the supporting horizontal plates is provided with a rotating rod through bearing rotation, and supports The top of the horizontal plate is also provided with a storage box, the bottom outer ring of the supporting horizontal plate is provided with a plurality of supporting legs, the lower side of the supporting horizontal plate is provided with a turntable at the lower end of the rotating rod, and the lower outer ring of the turntable rotates A handle is provided, and the upper side of the supporting horizontal plate is provided with a telescopic rod at the upper end of the rotating rod, and the telescopic rod is provided with an adjustment knob for adjusting and locking the length of the telescopic rod, and the upper end of the telescopic rod is provided with a mounting seat, so The left and right sides of the mounting seat are provided with sleeve fixing grooves, and sleeves are fixedly installed on the sleeve fixing grooves. A cross bar is provided for sliding in the sleeve, and a sleeve is also provided on the sleeve for adjusting and locking the cross bar. The second locking bolt, the end of the cross bar is provided with an upper opening slot, the two ends of the memory metal strip are correspondingly installed in the slots of the two cross bars, and the ends of the two cross bars are also provided with For the first locking bolt that locks the memory metal strip, a steel wire channel is provided on the inner side of the upper part of the mounting seat, and both ends of the steel wire channel extend to the upper end surface of the mounting seat and communicate with the outside world. The steel wire channel is used for The steel wire passes through, and the top of the mounting seat is also provided with a third locking bolt for fixing the steel wire in the steel wire channel.

Preferably, the lower ends of the supporting legs are inclined to the outside.

Preferably, scales are also provided on the cross bar.

Preferably, the steel wire channel is an arc-shaped structure with a downwardly recessed middle.

Preferably, the surfaces of the handle, the adjusting knob, the first locking bolt, the second locking bolt and the third locking bolt are all provided with anti-skid lines.

Compared with the prior art, the utility model has the beneficial effects that: the extension length of the telescopic rod can be adjusted by adjusting the knob, so as to adjust the height of the demonstration; the steel wire can be passed through the steel wire passage, and the third The locking bolt fixes the steel wire, and then rotates the handle with the hand to perform a parabolic demonstration; it is also possible to insert the two ends of the memory metal strip into the card slot and fix the memory metal strip through the first locking bolt. Pulling the two crossbars can change the radian of the memory metal strip, allowing for a more accurate demonstration of the parabola. The crossbar can be locked by the second locking bolt, and the scale on the crossbar is convenient for checking its extension length. Observe; the storage box on the top of the supporting horizontal plate is also used for storage of items such as steel wires.

The parabolic demonstration teaching aid is easy to use, can be demonstrated with traditional steel wires, and can be more accurately demonstrated with memory metal strips, has rich functions, and is convenient for popularization and application.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a partial sectional view of the utility model.

In the figure: 1-supporting leg, 2-turntable, 3-handle, 4-supporting horizontal plate, 5-storage box, 6-rotating rod, 7-telescopic rod, 8-adjusting knob, 9-horizontal bar, 91- Card slot, 10-first locking bolt, 11-memory metal strip, 12-second locking bolt, 13-sleeve, 14-third locking bolt, 15-mounting seat, 151-sleeve fixing groove, 152 - wire channel.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Please refer to Fig. 1-2, in the utility model embodiment, a kind of university mathematics paraboloid teaching demonstration model comprises support leg 1, support horizontal board 4, telescopic rod 7, cross bar 9, sleeve pipe 13, memory metal bar 11 And mounting base 15, the center of described support horizontal plate 4 is provided with rotating rod 6 through bearing rotation, and the top of support horizontal plate 4 is also provided with storage box 5, is filled with parabolic demonstration steel wire in storage box 5, so The bottom outer ring of the support horizontal plate 4 is provided with a plurality of support legs 1, the support horizontal plate 4 can be supported by the support legs 1, the lower side of the support horizontal plate 4 is provided with a turntable 2 at the lower end of the rotating rod 6, and the turntable 2 is provided with a handle 3 for rotating the lower outer ring, through which the turntable 2 can be rotated, and then the rotating rod 6 can be rotated. The upper side of the supporting horizontal plate 4 is provided with a telescopic rod 7 at the upper end of the rotating rod 6, The telescopic rod 7 is provided with an adjustment knob 8 for adjusting and locking the telescopic rod 7, the upper end of the telescopic rod 7 is provided with a mount 15, and the left and right sides of the mount 15 are provided with casing fixing grooves 151 , the sleeve 13 is fixedly installed on the sleeve fixing groove 151, and the cross bar 9 is cooperating and sliding inside the sleeve 13, and the second locking bolt 12 for adjusting and locking the cross bar 9 is also provided on the sleeve 13 , the end of the crossbar 9 is provided with an upper opening slot 91, and the two ends of the memory metal strip 11 are correspondingly installed in the slot 91 of the two crossbars 9, and the ends of the two crossbars 9 are also provided with For the first locking bolt 10 that locks the memory metal strip 11, the memory metal strip 11 is a shape memory alloy, and there are many specific materials for the memory metal strip 11 to choose from, without limitation, the upper inner side of the mounting seat 15 A steel wire passage 152 is provided, and both ends of the steel wire passage 152 extend to the upper end surface of the mounting base 15 and communicate with the outside world. The steel wire passage 152 is used for steel wires to pass through. The third locking bolt 14 that the inner steel wire is fixed.

Preferably, the lower ends of the supporting legs 1 are inclined to the outside.

Preferably, a scale is also provided on the cross bar 9 .

Preferably, the steel wire channel 152 is an arc-shaped structure with a downwardly recessed middle.

As a preference, the surfaces of the handle 3, the adjusting knob 8, the first locking bolt 10, the second locking bolt 12 and the third locking bolt 14 are all provided with anti-slip lines, so that the handle 3, the adjusting knob 8, The first locking bolt 10 , the second locking bolt 12 and the third locking bolt 14 are rotated.

When the parabolic demonstration teaching aid is in use, the extension length of the telescopic rod 7 can be adjusted through the adjustment knob 8, so as to adjust the height of the demonstration; the steel wire can be passed through the steel wire channel 152 and passed through the third locking bolt 14 Fix the steel wire, then hold the handle 3 and rotate it to demonstrate the parabolic surface; it is also possible to insert the two ends of the memory metal strip 11 into the card slot 91, and fix the memory metal strip 11 through the first locking bolt 10 , by pulling the two crossbars 9, the radian of the memory metal strip 11 can be changed, and a more accurate parabolic demonstration can be performed. The crossbar 9 can be locked by the second locking bolt 12, and the scale on the crossbar 9 It is convenient to observe its elongation length; in addition, the storage box 5 on the top of the support horizontal plate 4 is also used for storing items such as steel wires.

The above are only preferred embodiments of the present utility model, and it should be pointed out that for those skilled in the art, some deformations and improvements can be made without departing from the concept of the present utility model, and these should also be regarded as the present utility model. The scope of protection of the new model will not affect the effect of the utility model and the practicability of the patent.

Claims (5)

1. a kind of College Maths parabola teaching demonstrating model, including supporting leg, support transverse slat, expansion link, cross bar, sleeve pipe, Memory metal bar and mounting seat, it is characterised in that the centre of the support transverse slat is rotated by bearing and is provided with bull stick, support is horizontal Parcel tray is additionally provided with the top of plate, the bottom outer ring of the support transverse slat is provided with multiple supporting legs, the downside of the support transverse slat Rotating disk is provided with bull stick lower end, the downside outer ring rotating of rotating disk is provided with handle, and the upside of the support transverse slat is set in bull stick upper end There is expansion link, expansion link is provided with the adjusting knob for being used for that length adjustment locking to be carried out to expansion link, the upper end of the expansion link Provided with mounting seat, the left and right sides of the mounting seat, which is equipped with sleeve pipe fixing groove, sleeve pipe fixing groove, is installed with sleeve pipe, institute State the second clamping screw for coordinating in sleeve pipe and sliding and being provided with and be additionally provided with cross bar, sleeve pipe for cross bar being adjusted locking, institute The end for stating cross bar is provided with the neck of upper shed, and the two ends correspondence of memory metal bar is installed in the neck of two cross bars, two The end of cross bar is additionally provided with for entering line-locked first clamping screw to memory metal bar, and the upper inner of the mounting seat is set There is steel wire passage, the two ends of steel wire passage all extend to the upper surface of mounting seat and are in communication with the outside, and the steel wire passage is used for Steel wire is passed through, and the 3rd clamping screw for steel wire in steel wire passage to be fixed is additionally provided with the top of mounting seat.

2. College Maths parabola teaching demonstrating model according to claim 1, it is characterised in that the supporting leg Lower end is tilted laterally.

3. College Maths parabola teaching demonstrating model according to claim 1, it is characterised in that on the cross bar also Provided with scale.

4. College Maths parabola teaching demonstrating model according to claim 1, it is characterised in that the steel wire passage For arcuate structure from middle part to lower recess.

5. College Maths parabola teaching demonstrating model according to claim 1, it is characterised in that the handle, tune The surface for saving knob, the first clamping screw, the second clamping screw and the 3rd clamping screw is equipped with anti-slip veins.