CN210337391U

CN210337391U - Advanced mathematics teaching draws device with portable curve

Info

Publication number: CN210337391U
Application number: CN201921171799.5U
Authority: CN
Inventors: 陈亦佳
Original assignee: Yuxi Normal University
Current assignee: Yuxi Normal University
Priority date: 2019-07-24
Filing date: 2019-07-24
Publication date: 2020-04-17
Anticipated expiration: 2029-07-24

Abstract

The utility model discloses a movable curve drawing device for advanced mathematics teaching, which comprises a main guide rail, a first switching device and a second switching device, the switching device comprises a first switching device and a second switching device, the first switching device and the second switching device both comprise an upper mounting seat, the rear surface of the upper mounting seat is rotatably connected with a lower mounting seat, the upper mounting seat and the lower mounting seat are both U-shaped, the inner front surface of the upper mounting seat is rotatably connected with one end of a gear, the other end of the gear respectively penetrates through the rear side wall of the upper mounting seat and the front side wall of the lower mounting seat to be rotatably connected with the inner rear surface of the lower mounting seat, the utility model draws a conical curve through the definition of the conical curve and the conversion of a mechanical structure, the accuracy of drawing the curve is guaranteed, and meanwhile students can visually know the definition of the conical curve in the drawing process.

Description

Advanced mathematics teaching draws device with portable curve

Technical Field

The utility model relates to a teaching aid technical field, concrete field is a device is drawn with portable curve to advanced math teaching.

Background

Higher mathematics is a basic subject formed by calculus, deeper algebra, geometry and cross content among them, and its main contents include: limit, calculus, space analytic geometry and vector algebra, series, ordinary differential equation, etc. In advanced math teaching process, the teacher often need draw various different curves on the blackboard, makes the student obtain audio-visual impact, deepens student's memory, improves the teaching effect, and wherein just including conical curve, however, it is very troublesome and time-consuming to use current teaching tool to draw conical curve, and the plotting time is longer, influences teaching efficiency, and the student is difficult to the drawing principle of comparatively audio-visual understanding conical curve when just drawing, is unfavorable for the teaching.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a device is drawn with portable curve to advanced mathematics teaching to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a portable curve drawing device for advanced math teaching, includes leading rail, first switching device and second switching device, first switching device includes the mount pad, the rear surface of going up the mount pad rotates and is connected with down the mount pad, it all is the U type with lower mount pad to go up the mount pad, the interior front surface of going up the mount pad rotates and is connected with the one end of gear, the other end of gear runs through respectively the back lateral wall of going up the mount pad with the preceding lateral wall of mount pad rotates and connects in the interior rear surface of mount pad down, first switching device is the same with second switching device structure, the lateral wall of leading rail has cup jointed first sleeve pipe, the front surface of first sleeve pipe rotates and is connected with vice guide rail, vice guide rail includes first guide rail and second guide rail, first guide rail with second guide rail mutually perpendicular, the lateral wall of first guide rail has cup jointed the second sleeve pipe, the outer upper surface of the second sleeve is perpendicular to the first guide rail and is provided with a vertical rod, the right surface of the vertical rod is provided with a rack, the left surface of the main guide rail is perpendicular to a first connecting rod, the left end of the first connecting rod is fixedly connected with the first switching device, the inner side wall of the first connecting rod is spliced with a second connecting rod, the upper surface of the second connecting rod is provided with a rack, the second connecting rod penetrates through the inner wall of a lower mounting seat in the first switching device, the rack on the upper surface of the second connecting rod is meshed with a gear in the first switching device, the vertical rod penetrates through the inner wall of an upper mounting seat in the first switching device, the rack on the right surface of the vertical rod is meshed with a gear in the first switching device, the left surface of the second connecting rod is perpendicular to a line drawing rod, and the outer side wall of the second guide rail is sleeved with a third, the outer left surface perpendicular to of third sheathed tube the second guide rail is equipped with the horizontal pole, the upper surface of horizontal pole is equipped with the rack, the lateral wall of horizontal pole has cup jointed second switching device, the horizontal pole passes the inner wall of last mount pad in the second switching device, just the rack of horizontal pole upper surface with gear engagement in the second switching device, the one end of third connecting rod has been cup jointed to the inner wall of mount pad down in the second switching device, the upper surface of third connecting rod be equipped with the rack and with gear engagement in the second switching device, the other end of third connecting rod rotates and is connected with the fourth sleeve pipe, the sheathed tube inner wall of fourth has cup jointed the line drawing pole.

Preferably, a suction cup is fixedly connected to the rear surface of the second adapter device.

Preferably, a fastening bolt is arranged at the joint of the front side wall of the first sleeve corresponding to the auxiliary guide rail.

Preferably, a protractor is arranged at the position, corresponding to the joint of the auxiliary guide rail, of the front surface of the first sleeve, and a pointer is arranged at the position, corresponding to the scale of the protractor, of the front surface of the second guide rail.

Preferably, the side wall of the fourth sleeve is provided with a through hole.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model provides a higher mathematics teaching is with portable curve drawing device, utilize conic's definition, give a point P promptly, a straight line L and a non-burden real constant e, then the orbit that the distance to P and the point that the ratio of L distance is e is conic, through switching device, the distance that moves along the X axle with the horizontal pole, transmit the third connecting rod for through the gear, transmit the distance that the montant moved along the Y axle for the second connecting rod, thereby draw comparatively accurate conic more, can adjust e's size through the angle of adjusting the slope between vice guide rail and the main guide rail simultaneously, and is easy and simple to handle, and in the drawing process, the student can follow the audio-visual definition of understanding conic in the drawing process.

Drawings

Fig. 1 is a schematic view of a front view cross-sectional structure of the present invention;

fig. 2 is a schematic view of a left-side sectional structure of the second adapter of the present invention.

In the figure: 1-main guide rail, 201-upper mounting base, 202-lower mounting base, 203-gear, 3-first sleeve, 4-auxiliary guide rail, 401-first guide rail, 402-second guide rail, 5-second sleeve, 6-vertical bar, 7-first connecting bar, 8-second connecting bar, 9-line drawing bar, 10-third sleeve, 11-cross bar, 12-third connecting bar, 13-fourth sleeve, 14-suction cup, 15-fastening bolt, 16-protractor, 17-pointer, 18-through hole, 20-first switching device and 21-second switching device.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a device is drawn with portable curve to advanced mathematics teaching, includes leading rail 1, first switching device 20 and second switching device 21, leading rail 1 is the bar, first switching device 20 includes mount pad 201, the rear surface of going up mount pad 201 rotates and is connected with mount pad 202 down, it all is the U type with mount pad 202 down to go up mount pad 201, the interior front surface of going up mount pad 201 rotates and is connected with the one end of gear 203, the other end of gear 203 runs through respectively the back lateral wall of going up mount pad 201 with the preceding lateral wall of mount pad 202 rotates and is connected the interior rear surface of mount pad 202 down, the back lateral wall of going up mount pad 201 with the preceding lateral wall of mount pad 202 down all is equipped with logical groove and makes gear 203 pass, the back lateral wall of going up mount pad 201 corresponds the outside that leads to the groove is equipped with the slider, the logical inslot wall of the preceding lateral wall of mount pad 202 down is equipped with the spout that matches with it, the rotating shaft center of the upper mounting seat 201 and the rotating shaft center of the lower mounting seat 202 are the same as the rotating shaft center of the gear 203, when the upper mounting seat 201 rotates around the lower mounting seat 202, the rotation of the gear 203 is not hindered, the first switching device 20 and the second switching device 21 have the same structure, the outer side wall of the main guide rail 1 is sleeved with the first sleeve 3, the first sleeve 3 can slide up and down along the main guide rail 1, the front surface of the first sleeve 3 is rotatably connected with the auxiliary guide rail 4, the auxiliary guide rail 4 comprises the first guide rail 401 and the second guide rail 402, the first guide rail 401 and the second guide rail 402 are perpendicular to each other, the outer side wall of the first guide rail 401 is sleeved with the second sleeve 5, the outer upper surface of the second sleeve 5 is perpendicular to the first guide rail 401 and is provided with the vertical rod 6, the right surface of the vertical rod 6 is provided with the rack, the left surface of the main guide rail 1 is perpendicularly provided with the first connecting rod 7, the left surface fixed connection of head rod 7 has first switching device 20, the inside wall of head rod 7 is pegged graft and is had second connecting rod 8, head rod 7 with second connecting rod 8 is flexible wantonly, the upper surface of second connecting rod 8 is equipped with the rack, second connecting rod 8 passes in the first switching device 20 the inner wall of mount pad 202 down, just the rack of second connecting rod 8 upper surface with gear 203 meshes in the first switching device 20, works as second connecting rod 8 along when head rod 7 horizontal slip, rack on the second connecting rod 8 can drive gear 203 is rotatory, montant 6 passes the inner wall of last mount pad 201 in the first switching device 20, just the rack on montant 6 right surface with gear 203 meshes in the first switching device 20 to make montant 6 relative the distance that first switching device 20 removed transmits for the distance that second connecting rod 8 removed apart from the second connecting rod 8 removes A drawing rod 9 is vertically arranged on the left surface of the second connecting rod 8, a third sleeve 10 is sleeved on the outer side wall of the second guide rail 402, a cross rod 11 is arranged on the outer left surface of the third sleeve 10, which is perpendicular to the second guide rail 402, a rack is arranged on the upper surface of the cross rod 11, a second adapter 21 is sleeved on the outer side wall of the cross rod 11, the cross rod 11 penetrates through the inner wall of the upper mounting seat 201 in the second adapter 21, the rack on the upper surface of the cross rod 11 is meshed with a gear 203 in the second adapter 21, one end of a third connecting rod 12 is sleeved on the inner wall of the lower mounting seat 202 in the second adapter 21, the rack is arranged on the upper surface of the third connecting rod 12 and is meshed with a gear 203 in the second adapter 21, so that the moving distance of the cross rod 11 relative to the second adapter 21 is converted into the moving distance of the third connecting rod 12 relative to the second adapter 21, the other end of the third connecting rod 12 is rotatably connected with a fourth sleeve 13, and the inner wall of the fourth sleeve 13 is sleeved with the line drawing rod 9.

Specifically, the suction cup 14 is fixedly connected to the rear surface of the second adapter 21, and the suction cup 14 is convenient to fix because the second adapter 21 serves as a fixed point in the drawing process.

Particularly, the front side wall of the first sleeve 3 is provided with a fastening bolt 15 corresponding to the joint of the auxiliary guide rail 4, and the angle of the auxiliary guide rail 4 relative to the main guide rail 1 can be conveniently fixed after the angle is adjusted.

Specifically, a protractor 16 is arranged at the joint of the front surface of the first sleeve 3 corresponding to the secondary guide rail 4, and a pointer 17 is arranged at the scale of the front surface of the second guide rail 402 corresponding to the protractor 16, so that the inclination angle can be observed conveniently.

Particularly, the lateral wall of fourth sleeve 13 is equipped with through-hole 18, through-hole 18 plays the effect of fixed painting brush to need not the handheld painting brush of teacher, increased the practicality.

The working principle is as follows: the utility model discloses use when the conic section need be drawn in the teaching process, can know by the conic section definition, give some P, straight line L and a non-burden real constant e, then the orbit that the distance to P and the point that the ratio of L distance is e is conic section, main guide rail 1 is sharp L, point P is second switching device 21, at first fixed main guide rail 1 and second switching device 21, adjust vice guide rail 4 with main guide rail 1's inclination adjusts and tightens fastening bolt 15 after suitable angle, inclination is theta, make it remove one section distance Z to the first sleeve pipe 3 of top slip, second sleeve pipe 5 and third sleeve pipe 10 on vice guide rail 4 just can remove along with it, the montant 6 on the second sleeve pipe 5 moves to the top, the distance of removal is for the distance that removes to first guide rail 401 direction and the distance that removes to second guide rail 402 direction, wherein the distance that removes along first guide rail 401 direction turns into second sleeve pipe 5 along the gliding distance of first guide rail 401 And the distance moving along the second guide rail 402 is transmitted to the gear 203 in the first switching device 20 through the rack on the vertical rod 6, and the gear 203 drives the second connecting rod 8 to move, i.e. the distance moving along the straight line L of the drawing rod 9 is cos θ Z, and similarly, the transverse rod 11 moves upwards, and can also be decomposed into two directions of movement, i.e. the distance moving along the first guide rail 401 and the distance moving along the second guide rail 402, wherein the distance moving along the second guide rail 402 is converted into the sliding of the third sleeve 10 along the second guide rail 402, the distance moving along the first guide rail 401 is converted into the distance moving along the third connecting rod 12 through the second switching device 21, and the second switching device 21 is P, i.e. the distance moving along the fixed point P of the fourth sleeve 13 is the component of the distance moving along the transverse rod 11 in the direction of the first guide rail 401, sin θ Z, the ratio of the moving distance of the fourth sleeve 13 relative to the fixed point P and the straight line L is tan θ ═ e, which is a certain value, i.e. the track traveled by the fourth sleeve 13 is a conic curve, and the angle of inclination of the second guide rail 402 and the main guide rail 1 can be adjusted to change the tan θ value, thereby drawing the conic curves with different curvatures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The utility model discloses the standard part that uses all can purchase from the market, and dysmorphism piece all can be customized according to the description with the record of drawing of description, and the concrete connection mode of each part all adopts conventional means such as ripe bolt, rivet, welding among the prior art, and machinery, part and equipment all adopt prior art, and conventional model, including circuit connection adopts conventional connection mode among the prior art, does not detailed here again.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a device is drawn with portable curve to advanced mathematics teaching, includes main rail (1), first switching device (20) and second switching device (21), its characterized in that: the first switching device (20) comprises an upper mounting seat (201), the rear surface of the upper mounting seat (201) is rotatably connected with a lower mounting seat (202), the upper mounting seat (201) and the lower mounting seat (202) are both U-shaped, the inner front surface of the upper mounting seat (201) is rotatably connected with one end of a gear (203), the other end of the gear (203) respectively penetrates through the rear side wall of the upper mounting seat (201) and the front side wall of the lower mounting seat (202) and is rotatably connected with the inner rear surface of the lower mounting seat (202), the first switching device (20) and the second switching device (21) are identical in structure, the outer side wall of the main guide rail (1) is sleeved with a first sleeve (3), the front surface of the first sleeve (3) is rotatably connected with an auxiliary guide rail (4), the auxiliary guide rail (4) comprises a first guide rail (401) and a second guide rail (402), the first guide rail (401) and the second guide rail (402) are perpendicular to each other, a second sleeve (5) is sleeved on the outer side wall of the first guide rail (401), the outer upper surface of the second sleeve (5) is perpendicular to the first guide rail (401) and is provided with a vertical rod (6), the right surface of the vertical rod (6) is provided with a rack, a first connecting rod (7) is perpendicularly arranged on the left surface of the main guide rail (1), the left end of the first connecting rod (7) is fixedly connected with the first adapter device (20), a second connecting rod (8) is inserted into the inner side wall of the first connecting rod (7), the upper surface of the second connecting rod (8) is provided with a rack, the second connecting rod (8) penetrates through the inner wall of the lower mounting seat (202) in the first adapter device (20), and the rack on the upper surface of the second connecting rod (8) is meshed with the gear (203) in the first adapter device (20), the vertical rod (6) penetrates through the inner wall of the middle and upper mounting seat (201) of the first switching device (20), the rack on the right surface of the vertical rod (6) is meshed with the gear (203) in the first switching device (20), the left surface of the second connecting rod (8) is vertically provided with a line drawing rod (9), the outer side wall of the second guide rail (402) is sleeved with a third sleeve (10), the outer left surface of the third sleeve (10) is perpendicular to the second guide rail (402) and is provided with a cross rod (11), the upper surface of the cross rod (11) is provided with a rack, the outer side wall of the cross rod (11) is sleeved with a second switching device (21), the cross rod (11) penetrates through the inner wall of the middle and upper mounting seat (201) of the second switching device (21), and the rack on the upper surface of the cross rod (11) is meshed with the gear (203) in the second switching device (21), the inner wall of the lower mounting seat (202) in the second switching device (21) is sleeved with one end of a third connecting rod (12), the upper surface of the third connecting rod (12) is provided with a rack and is meshed with a gear (203) in the second switching device (21), the other end of the third connecting rod (12) is rotatably connected with a fourth sleeve (13), and the inner wall of the fourth sleeve (13) is sleeved with the line drawing rod (9).

2. The portable curve-drawing device for advanced math teaching according to claim 1, wherein: the back surface of the second switching device (21) is fixedly connected with a sucker (14).

3. The portable curve-drawing device for advanced math teaching according to claim 1, wherein: and a fastening bolt (15) is arranged at the joint of the front side wall of the first sleeve (3) corresponding to the auxiliary guide rail (4).

4. The portable curve-drawing device for advanced math teaching according to claim 1, wherein: the front surface of the first sleeve (3) is provided with a protractor (16) corresponding to the joint of the auxiliary guide rail (4), and the front surface of the second guide rail (402) is provided with a pointer (17) corresponding to the scale of the protractor (16).

5. The portable curve-drawing device for advanced math teaching according to claim 1, wherein: the side wall of the fourth sleeve (13) is provided with a through hole (18).