CN210924975U

CN210924975U - Demonstration device for probability theory and mathematical statistics teaching

Info

Publication number: CN210924975U
Application number: CN201922145783.3U
Authority: CN
Inventors: 庞维亮
Original assignee: Dunhuang Art Tourism Secondary School
Current assignee: Dunhuang Art Tourism Secondary School
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-07-03
Anticipated expiration: 2029-12-04

Abstract

The utility model discloses a demonstration device for probability theory and mathematical statistics teaching, which comprises a base, the upper end of the base is fixedly connected with a protective cover, two sides of the inner part of the protective cover are respectively provided with a threaded rod, the inner bottom wall of the protective cover is fixedly connected with an electric motor, the driving end of the electric motor is fixedly connected with a worm, a worm wheel is arranged on one side of the worm, a round slide block is fixedly connected with the bottom end of the threaded rod, cylindrical chutes are respectively arranged on two sides of the inner bottom wall of the protective cover, a movable frame is arranged above the protective cover, both sides of the bottom end of the movable frame are respectively and fixedly connected with a threaded sleeve, the threaded sleeve is sleeved outside the threaded rod, the top end of the threaded rod is fixedly connected with a circular baffle plate, one side fixedly connected with whiteboard of removal frame, the bottom both sides of base fixedly connected with universal wheel respectively. The utility model discloses simple structure, convenient operation has very high use value.

Description

Demonstration device for probability theory and mathematical statistics teaching

Technical Field

The utility model relates to a presentation device field especially relates to a presentation device is used in probability theory and mathematical statistics teaching.

Background

The number of people who learns probability theory and mathematical statistics in high school and science and technology colleges is numerous, but traditional presentation device for teaching utilizes the projecting apparatus mostly, put in the content of imparting knowledge to students on the curtain, but often need debug the projecting apparatus and can be more troublesome, and most crucial is that this type course mostly can all be class in large-scale classroom, sit some students near the wall and be difficult to see the class appearance on the curtain clearly, consequently, need a probability theory that accords with modern demand and presentation device for mathematical statistics teaching.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a demonstration device for probability theory and mathematical statistics teaching.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a demonstration device for probability theory and mathematical statistics teaching comprises a base, wherein a protective cover is fixedly connected to the upper end of the base, threaded rods are respectively arranged on two sides of the inner portion of the protective cover, a motor is fixedly connected to the inner bottom wall of the protective cover, a worm is fixedly connected to the driving end of the motor, a worm wheel is arranged on one side of the worm, the middle portion of the worm wheel penetrates through the threaded rods and is fixedly connected with the outer side of the threaded rods, the worm is meshed with the worm wheel, a circular sliding block is fixedly connected to the bottom end of the threaded rods, cylindrical sliding grooves are respectively arranged on two sides of the inner bottom wall of the protective cover, the circular sliding block is embedded into the cylindrical sliding grooves, the outer side surface of the circular sliding block is in smooth contact with the inner side wall surface of the cylindrical sliding grooves, the threaded sleeve is sleeved on the outer side of the threaded rod, the circular baffle is fixedly connected to the top end of the threaded rod, the electronic whiteboard is fixedly connected to one side of the moving frame, and the universal wheels are fixedly connected to two sides of the bottom end of the base respectively.

As a further description of the above technical solution:

the height of the movable frame is equal to the distance from the top end of the protective cover to the motor.

As a further description of the above technical solution:

the width of moving the frame equals whiteboard's width, and slightly is less than the width of the inside wall of safety cover.

As a further description of the above technical solution:

a gap is reserved between the circular baffle and the inner side wall of the movable frame.

As a further description of the above technical solution:

the motor is electrically connected with the mobile power supply and the remote controller switch.

As a further description of the above technical solution:

circular baffle, circular slider all are welded fastening with the threaded rod, safety cover and base are welded fastening, the thread bush is welded fastening with the bottom of removing the frame.

As a further description of the above technical solution:

the motor is fixedly connected with the inner bottom wall of the protective cover through bolts, the electronic whiteboard is fixedly connected with the moving frame through bolts, and the universal wheels are fixedly connected with the bottom end of the base through bolts.

The utility model discloses following beneficial effect has:

the utility model discloses a set up motor, worm, turbine, threaded rod, thread bush and removed structural component such as frame, can realize freely going up and down with whiteboard in the protective cover, it is very convenient to compare projector equipment and use, has avoided whiteboard to expose the potential safety hazard of existentering moreover all the time.

The utility model discloses a set up base and universal wheel, can change whiteboard's show angle wantonly, let more students see clear teaching content.

Drawings

Fig. 1 is a cross-sectional view of a demonstration device for teaching probability theory and mathematical statistics provided by the utility model;

FIG. 2 is a side view of a demonstration device for probability theory and mathematical statistics teaching provided by the present invention;

FIG. 3 is an enlarged view taken at A in FIG. 1;

fig. 4 is an enlarged view at B in fig. 1.

Illustration of the drawings:

1. a base; 2. a protective cover; 3. a threaded rod; 4. a movable frame; 5. a universal wheel; 6. an electric motor; 7. a worm; 8. a turbine; 9. a cylindrical chute; 10. a circular slider; 11. a threaded sleeve; 12. a circular baffle; 13. an electronic whiteboard.

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.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-4, the present invention provides an embodiment: a demonstration device for probability theory and mathematical statistics teaching comprises a base 1, wherein a protective cover 2 is fixedly connected to the upper end of the base 1, an electronic white board 13 can be accommodated in the protective cover 2 after being used, potential safety hazards exposed outside are avoided, meanwhile, dust accumulation can be prevented, threaded rods 3 are respectively arranged on two sides inside the protective cover 2, lifting of a movable frame 4 and the electronic white board 13 is achieved, a motor 6 is fixedly connected to the inner bottom wall of the protective cover 2 and used for providing power for lifting the movable frame 4, a worm 7 is fixedly connected to the driving end of the motor 6, a worm wheel 8 is arranged on one side of the worm 7, the middle portion of the worm wheel 8 penetrates through the threaded rods 3 and is fixedly connected with the outer side of the threaded rods 3, the worm 7 is meshed with the worm wheel 8 and used for transmitting power, a circular sliding block 10 is fixedly connected to the bottom end of the threaded rods 3, cylindrical sliding, the outer side surface of the circular slide block 10 is in smooth contact with the inner side wall surface of the cylindrical sliding groove 9 to ensure that the threaded rod 3 only rotates, the movable frame 4 is arranged above the protective cover 2, two sides of the bottom end of the movable frame 4 are respectively and fixedly connected with the threaded sleeves 11, and because the threaded sleeves 11 are limited to rotate in the horizontal direction, therefore, when the threaded rod 3 rotates, the threaded sleeve 11 drives the movable frame 4 to move up and down, the threaded sleeve 11 is sleeved outside the threaded rod 3, the top end of the threaded rod 3 is fixedly connected with the circular baffle 12 to prevent the threaded sleeve 11 from moving to the top end of the threaded rod 3 and falling off, one side of the movable frame 4 is fixedly connected with the electronic white board 13 to display the teaching content of probability theory and mathematical statistics, the two sides of the bottom end of the base 1 are respectively and fixedly connected with the universal wheels 5, the display angle of the electronic whiteboard 13 can be changed at will, so that more students can see clear teaching contents.

The height of the moving frame 4 is equal to the distance from the top end of the protective cover 2 to the motor 6, and the upper end surface of the electronic whiteboard 13 is flush with the upper end surface of the protective cover 2 after being completely received in the protective cover 2. The width of the movable frame 4 is equal to that of the electronic whiteboard 13 and slightly smaller than that of the inner side wall of the protective cover 2, so that the friction loss of the device components is avoided. A gap is reserved between the circular baffle 12 and the inner side wall of the movable frame 4, so that the friction loss of the device components is avoided. The motor 6 is electrically connected with the mobile power supply and a remote controller switch to realize remote manual control of the device. Circular baffle 12, circular slider 10 all are welded fastening with threaded rod 3, and safety cover 2 is welded fastening with base 1, and threaded sleeve 11 is welded fastening, stabilising arrangement component with the bottom of removing frame 4. The motor 6 is fixedly connected with the inner bottom wall of the protective cover 2 through bolts, the electronic whiteboard 13 is fixedly connected with the movable frame 4 through bolts, and the universal wheels 5 are fixedly connected with the bottom end of the base 1 through bolts, so that the universal wheels are convenient to detach, clean or repair.

The working principle is as follows: promote safety cover 2, remove it to the teaching demonstration place, then actuating motor 6, worm 7 rotates, drive worm wheel 8 and rotate, thereby threaded rod 3 begins to rotate, 11 upsets of thread bush, it moves frame 4 and whiteboard 13 rebound to drive to remove, the back that finishes to rise, shut down motor 6, probability theory and mathematical statistics teaching content can be demonstrated, in the meantime, can rotate safety cover 2 and change the show angle, let the student who sits at the corner see the teaching content on whiteboard 13 clearly, after class, reverse drive motor 6, remove in frame 4 and whiteboard 13 income safety cover 2, after the income finishes, shut down motor 6 can.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. The utility model provides a presentation device is used in teaching of probability theory and mathematical statistics, includes base (1), its characterized in that: the upper end fixedly connected with safety cover (2) of base (1), the inside both sides of safety cover (2) are equipped with threaded rod (3) respectively, the interior diapire fixedly connected with motor (6) of safety cover (2), the drive end fixedly connected with worm (7) of motor (6), one side of worm (7) is equipped with worm wheel (8), the middle part of worm wheel (8) passes threaded rod (3) and with the outside fixed connection of threaded rod (3), worm (7) and worm wheel (8) mesh, the bottom fixedly connected with circular slider (10) of threaded rod (3), the interior diapire both sides of safety cover (2) are equipped with cylindrical spout (9) respectively, inside circular slider (10) embedding cylindrical spout (9), the outside surface of circular slider (10) and the inside wall surface smooth contact of cylindrical spout (9), the top of safety cover (2) is equipped with removes frame (4), the bottom both sides difference fixedly connected with thread bush (11) of removing frame (4), the outside at threaded rod (3) is overlapped in thread bush (11), the top fixedly connected with circular baffle (12) of threaded rod (3), remove one side fixedly connected with electronic whiteboard (13) of frame (4), the bottom both sides difference fixedly connected with universal wheel (5) of base (1).

2. A demonstration apparatus for probability theory and mathematical statistics teaching according to claim 1 wherein: the height of the movable frame (4) is equal to the distance from the top end of the protective cover (2) to the motor (6).

3. A demonstration apparatus for probability theory and mathematical statistics teaching according to claim 1 wherein: the width of the movable frame (4) is equal to the width of the electronic whiteboard (13), and is slightly smaller than the width of the inner side wall of the protective cover (2).

4. A demonstration apparatus for probability theory and mathematical statistics teaching according to claim 1 wherein: a gap is reserved between the circular baffle (12) and the inner side wall of the movable frame (4).

5. A demonstration apparatus for probability theory and mathematical statistics teaching according to claim 1 wherein: the motor (6) is electrically connected with the mobile power supply and the remote controller switch.

6. A demonstration apparatus for probability theory and mathematical statistics teaching according to claim 1 wherein: circular baffle (12), circular slider (10) all are welded fastening with threaded rod (3), safety cover (2) are welded fastening with base (1), thread bush (11) are welded fastening with the bottom of removing frame (4).

7. A demonstration apparatus for probability theory and mathematical statistics teaching according to claim 1 wherein: the electric motor (6) is in fixed connection with the inner bottom wall of the protective cover (2) through bolts, the electronic whiteboard (13) is in fixed connection with the moving frame (4) through bolts, and the universal wheels (5) are in fixed connection with the bottom end of the base (1) through bolts.