Mathematical probability bar statistical chart demonstration device
A technology of demonstration device and statistical graph, which is applied in the field of demonstration device of mathematical probability bar graph statistics, can solve the problems of inconvenient use, inconvenient recycling, and inconvenient height of bar columns, etc., and achieve the effect of easy change, easy replacement, and easy use
Inactive Publication Date: 2021-12-31
CHONGQING UNIV OF EDUCATION
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Problems solved by technology
However, there are some problems in the current demonstration device: 1. The height of the bar column is not easy to adjust, and the data on the back panel is not easy to replace during use; The lengths of the internal data cables are different. When the data cables are pulled out for a long time, it is not easy to recycle, and the plug of the recycling hand is not easy to fix, which makes the device inconvenient to use.
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[0027] A mathematical probability bar chart demonstration device, including a base box 1, a display frame 2, a height adjustment mechanism 3, a plate changing mechanism 4, a wire take-up mechanism 5, a power supply box 6, a speaker 7, a Bluetooth module 8, and support legs 9, Backlight 10, controller 11, case cover 12 and data board 42, the upper end of described base case 1 is fixedly connected with display frame 2, and the inside of described display frame 2 is provided with height adjustment mechanism 3, and the inside of described display frame 2 A board changing mechanism 4 is provided inside, and a power supply box 6 is fixedly connected to the inside of the base box 1, and a wire take-up mechanism 5 is arranged inside the power supply box 6, and two symmetrical distribution boxes are fixedly connected inside the base box 1. The sound box 7, the sound box 7 is fixedly connected with the power box 6, the upper end of the power box 6 is fixedly connected with a bluetooth mo...
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The invention discloses a mathematical probability bar statistical chart demonstration device, which comprises a base box, a display frame, a height adjusting mechanism, a plate changing mechanism, a take-up mechanism, a power supply box, a loudspeaker box, a Bluetooth module, supporting legs, a backlight lamp, a controller, a box cover and a data board. The upper end of the base box is fixedly connected with the display frame, a height adjusting mechanism is arranged in the display frame, a plate changing mechanism is arranged in the display frame, a power box is fixedly connected in the base box, a take-up mechanism is arranged in the power box, two symmetrically distributed sound boxes are fixedly connected in the base box, and the sound boxes are fixedly connected with the power box. The upper end of the power box is fixedly connected with a Bluetooth module, and the lower end of the base box is fixedly connected with supporting legs. According to the invention, the mathematical probability bar statistical chart demonstration device has the advantages that bar-shaped columns are convenient to adjust, a data board is convenient to replace, and a data line and a plug are convenient to store.
Description
technical field [0001] The invention belongs to the technical field of teaching aids, in particular to a demonstration device for a bar chart of mathematical probability. Background technique [0002] The bar chart uses a unit length to represent a certain quantity, draws straight bars of different lengths according to the quantity, and then arranges these straight bars in a certain order. It is easy to see how many quantities are in the bar chart. bar statistics Figure 1 It is generally referred to as a bar graph, also called a long bar graph or a bar graph. When teaching probability, it is necessary to use an adjustment statistical graph demonstration device to demonstrate the formed image. However, there are some problems in the current demonstration device: 1. The height of the bar column is not easy to adjust, and the data on the back panel is not easy to replace during use; The lengths of the internal data wires are different. When the data wires are pulled out for ...
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IPC IPC(8): G09B23/02
CPCG09B23/02
Inventor 杨元超刘雪婷张滢陈龙倩
Owner CHONGQING UNIV OF EDUCATION