Mathematical probability model demonstration device

Abstract

The utility model discloses a mathematical probability model demonstration device, which comprises a hollow square shell, and an observation door is embedded in one side of the surface of the shell. A switch is installed on the surface of the shell, a demonstration area is arranged in the shell, a filtering mechanism is arranged in the shell, and the filtering mechanism comprises an air bellow installed in the shell, a motor is installed in the air bellow, a rotating shaft is fixedly connected to the tail end of an output shaft of the motor, and a fan is fixedly connected to the surface of the rotating shaft. According to the mathematical probability model demonstration device, the filtering mechanism is arranged, the opening is blocked, water is prevented from entering the device through the first filter screen, when the device is not used, the first filter screen and the second filter screen are staggered in position, the opening can be blocked, and water vapor is prevented from entering the device through the opening; damage to internal parts caused by water vapor is prevented, and the use safety of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mathematical model teaching aids, in particular to a mathematical probability model demonstration device. Background Art

[0002] Probability is a kind of reflection of the possibility of random events. Random events refer to events that may or may not occur under the same conditions. When conducting experimental demonstrations on model demonstration devices, it is often necessary to demonstrate the calculation process. Demonstration devices are used to show students real objects or intuitive teaching aids, or to conduct demonstrative experiments during teaching. Through actual observation, students gain perceptual knowledge to illustrate and verify the knowledge imparted. Demonstration teaching can enable students to obtain vivid and intuitive perceptual knowledge, deepen their impression of the learning object, connect theoretical knowledge in books with actual things, and form correct and profound concepts. However, when the existing mathematical probability model demonstration device is in use, the filter and the device are in a through-state, and the device cannot be sealed, which can easily cause water vapor to enter the interior of the device through the filter and damage the internal parts. Utility Model Content

[0003] The purpose of the utility model is to provide a mathematical probability model demonstration device to solve the problem in the background technology that the filter and the device are in a through-connected state and the device cannot be sealed, which easily causes water vapor to enter the interior of the device through the filter and cause damage to the internal parts.

[0004] To achieve the above object, the utility model provides the following technical solution: a mathematical probability model demonstration device, comprising a shell configured as a hollow square shell, and an observation door embedded in one side of the surface of the shell;

[0005] A switch is installed on the surface of the shell, and a demonstration area is arranged inside the shell. The surface of the demonstration area is fixedly connected to the ball outlet box, and an electromagnet and a blocking plate are embedded in the surface of the demonstration area, and the end of the electromagnet is connected to the blocking plate. The surface of the demonstration area is connected to multiple rows of blocks, and the surface of the demonstration area is connected to multiple gear bars;

[0006] A filtering mechanism is provided inside the shell, and the filtering mechanism includes: a bellows is installed inside the shell, and a motor is installed inside the bellows, the end of the output shaft of the motor is fixedly connected to a rotating shaft, and the surface of the rotating shaft is fixedly connected to a fan, an opening is embedded in the surface of the shell, and a mounting plate 1 is fixedly connected to the inner wall of the opening, and a plurality of filter screens 1 are embedded in the surface of the mounting plate 1, a mounting plate 2 is rotatably installed inside the opening, and a filter screen 2 is embedded in the surface of the mounting plate 2, the mounting plates 2 of the rotating shaft are connected, and the rotating shaft passes through the mounting plate 1 and is connected to a cleaning rod, and the cleaning rod is provided on the outside of the shell.

[0007] Preferably, the surface of the shell is provided with a rotating locking mechanism, and the locking mechanism comprises: a revolving door is symmetrically and rotatably installed in the surface of the shell, and a blocking block is fixedly connected to the surface of one side of the revolving door, and a mounting frame is fixedly connected to the inner wall of the shell, and a plurality of slots are fixedly provided on the surface of the mounting frame.

[0008] By adopting the above technical solution, the locking mechanism can easily fix the internal wiring harness and prevent the wiring harness from being messy.

[0009] Preferably, the observation door is configured as a transparent structure, and the observation door is arranged corresponding to the position of the demonstration area, the bottom of the ball outlet box is provided with a hole, and a blocking plate is arranged at the bottom of the hole of the ball outlet box, and the blocking plate is slidably connected to the ball outlet box, and the baffle is vertically arranged on the bottom surface of the demonstration area.

[0010] By adopting the above technical solution, the demonstration area can be observed through the observation door to watch the demonstration inside the demonstration area.

[0011] Preferably, the rotating shaft and the housing are rotatably connected, and an air outlet is provided on the top of the bellows, and the bellows is arranged corresponding to the opening position, and the opening and the bellows are through-connected.

[0012] By adopting the above technical solution, the rotating shaft rotates inside the shell, and air enters the interior of the bellows through the opening.

[0013] Preferably, the second mounting plate is rotatably connected to the opening, and the positions of the second mounting plate and the first mounting plate are correspondingly arranged, and the second mounting plate and the first mounting plate are rotatably connected, and the positions of the second filter and the first filter are staggered.

[0014] By adopting the above technical solution, the motor drives the second mounting plate to rotate inside the opening through the rotating shaft, and the second mounting plate drives the second filter screen to rotate.

[0015] Preferably, the end of the cleaning rod is in contact with the surface of the first mounting plate, and the first mounting plate and the cleaning rod are rotatably connected, and the rotating shaft is rotatably connected to the first mounting plate.

[0016] By adopting the above technical solution, when the cleaning rod rotates, it rotates on the surface of the mounting plate one to clean the surface of the mounting plate one.

[0017] Preferably, the blocking block is arranged corresponding to the position of the card slot, and the end of the blocking block fits the position of the card slot, and the revolving door is rotatably connected to the shell.

[0018] With the above technical solution, when the blocking block moves to one side of the slot, the slot is blocked by the blocking block, and the wiring harness falls off from the inside of the slot.

[0019] Compared with the prior art, the utility model has the following beneficial effects: the mathematical probability model demonstration device:

[0020] 1. A filtering mechanism is provided to block the opening to prevent water from entering the interior of the device through filter 1. When the device is not in use, the positions of filter 1 and filter 2 are staggered to block the opening to prevent water vapor from entering the interior of the device through the opening, prevent water vapor from corroding and damaging the internal steel balls, and increase the safety of the device;

[0021] 2. A locking mechanism is provided to facilitate fixing the position of the wiring harness, and fix the wiring harness between the block and the slot to prevent the wiring harness from being entangled and crossed with each other, and to prevent the wiring harness from being damaged by mutual wear. When the revolving door is opened, the block loses its blockage on the slot, making it convenient to remove the wiring harness from the inside of the slot, and to facilitate maintenance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure installed inside the shell of the utility model;

[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of the card slot installation of the utility model;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the bellows installation of the utility model;

[0026] Figure 5 This is a schematic diagram of the three-dimensional structure of the installation of the blocking block of the utility model;

[0027] Figure 6 This is a schematic diagram of the three-dimensional structure of the installation of filter screen 1 and filter screen 2 of the utility model.

[0028] In the figure: 10, housing;

[0029] 20, observation door; 201, switch; 202, demonstration area; 203, ball box; 204, electromagnet; 205, blocking plate; 206, stopper; 207, stop bar;

[0030] 30. bellows; 301. motor; 302. rotating shaft; 303. fan; 304. opening; 305. mounting plate 1; 306. filter 1; 307. mounting plate 2; 308. filter 2; 309. cleaning rod;

[0031] 40. revolving door; 401. blocking block; 402. mounting frame; 403. card slot. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] See also Figure 1-6 The utility model provides a technical solution: a mathematical probability model demonstration device, including a housing 10, an observation door 20, a switch 201, a demonstration area 202, a ball outlet box 203, an electromagnet 204, a blocking plate 205, a block 206, a stop bar 207, a bellows 30, a motor 301, a rotating shaft 302, a fan 303, an opening 304, a mounting plate 1 305, a filter 1 306, a mounting plate 2 307, a filter 2 308, a cleaning rod 309, a rotating door 40, a block 401, a mounting frame 402 and a card slot 403;

[0034] The mathematical probability model demonstration device is convenient for fixing the wiring harness, and the specific implementation method is as follows:

[0035] The invention comprises a shell 10 which is set as a hollow square shell, and an observation door 20 is embedded on one side of the surface of the shell 10; a switch 201 is installed on the surface of the shell 10, and a demonstration area 202 is arranged inside the shell 10, the surface of the demonstration area 202 is fixedly connected to the ball box 203, and an electromagnet 204 and a blocking plate 205 are embedded on the surface of the demonstration area 202, and the end of the electromagnet 204 is connected to the blocking plate 205, the surface of the demonstration area 202 is connected to multiple rows of blocks 206, and the surface of the demonstration area 202 is connected to multiple gear bars 207, and the surface of the shell 10 is rotated. The locking mechanism includes: a revolving door 40 is symmetrically rotatably installed in the surface of the shell 10, and a blocking block 401 is fixedly connected to the surface of the revolving door 40 on one side, a mounting frame 402 is fixedly connected to the inner wall of the shell 10, and a plurality of slots 403 are fixedly provided on the surface of the mounting frame 402, and an observation door 20 is arranged as a transparent structure, and the position of the observation door 20 corresponds to that of the demonstration area 202, so as to facilitate intuitive observation of the number of steel balls between each gear bar 207, and the observation door 20 can be opened to take out the steel balls between the gear bars 207 and replace them in the ball outlet box 203. A hole is provided at the bottom of the ball outlet box 203, and a blocking plate 205 is provided at the bottom of the hole of the ball outlet box 203, and the blocking plate 205 is slidably connected to the ball outlet box 203, and the blocking bar 207 is vertically arranged on the bottom surface of the demonstration area 202, the blocking block 401 is correspondingly arranged to the position of the card slot 403, and the end of the blocking block 401 is in contact with the position of the card slot 403, and the revolving door 40 and the outer shell 10 are rotatably connected.

[0036] Press the switch 201, the switch 201 controls the electromagnet 204 to turn on, the end of the electromagnet 204 extends to push the blocking plate 205 to move, and the blocking plate 205 slides inside the demonstration area 202, so that the blocking plate 205 and the holes of the ball outlet box 203 are staggered, and the steel ball falls from the hole at the bottom of the ball outlet box 203, and moves downward along the demonstration area 202. At this time, the block 206 can block the steel ball, and finally the steel ball falls between two adjacent gear bars 207. At this time, the probability of the steel ball falling between different gear bars 207 can be observed and understood through the calculation system inside the demonstration area 202;

[0037] When the revolving door 40 is closed, the blocking block 401 blocks the slot 403, and the position of the wiring harness can be fixed to prevent the wiring harness from being entangled with each other. When the revolving door 40 is opened, the revolving door 40 drives the blocking block 401 to move outward, so that the end of the blocking block 401 loses contact with the slot 403. At this time, the wiring harness inside the slot 403 can be taken out and the wiring harness can be inspected. After the inspection is completed, the wiring harness can be placed inside the slot 403, and the revolving door 40 is closed. At this time, the revolving door 40 drives the blocking block 401 to move to the slot 403 to fix the wiring harness inside.

[0038] The mathematical probability model demonstration device is convenient for blocking the opening 304 to prevent water vapor from entering the interior of the housing 10. The specific implementation method is as follows:

[0039] A filtering mechanism is provided inside the housing 10, and the filtering mechanism includes: a bellows 30 is installed inside the housing 10, and a motor 301 is installed inside the bellows 30, a rotating shaft 302 is fixedly connected to the end of the output shaft of the motor 301, and a fan 303 is fixedly connected to the surface of the rotating shaft 302, an opening 304 is embedded in the surface of the housing 10, and a mounting plate 1 305 is fixedly connected to the inner wall of the opening 304, and a plurality of filter screens 1 306 are embedded in the surface of the mounting plate 1 305, a mounting plate 2 307 is rotatably installed inside the opening 304, and a filter screen 2 308 is embedded in the surface of the mounting plate 2 307, the mounting plate 2 307 of the rotating shaft 302 is connected, and the rotating shaft 302 passes through the mounting plate 1 305 and is connected to a cleaning rod 309, and the cleaning rod 309 is arranged on the outside of the shell 10, the rotating shaft 302 and the shell 10 are rotatably connected, and an air outlet is opened on the top of the bellows 30, and the bellows 30 and the opening 304 are arranged correspondingly, the opening 304 and the bellows 30 are through-connected, the mounting plate 2 307 and the opening 304 are rotatably connected, and the positions of the mounting plate 2 307 and the mounting plate 1 305 are arranged correspondingly, and the mounting plate 2 307 and the mounting plate 1 305 are rotatably connected, the positions of the filter screen 2 308 and the filter screen 1 306 are staggered, the end of the cleaning rod 309 is fitted with the surface of the mounting plate 1 305, and the mounting plate 1 305 and the cleaning rod 309 are rotatably connected, and the rotating shaft 302 and the mounting plate 1 305 are rotatably connected.

[0040] The motor 301 is started, and the output shaft of the motor 301 drives the rotating shaft 302 to rotate, and the rotating shaft 302 drives the fan 303 to rotate. At this time, the fan 303 rotates inside the bellows 30, and the air enters the opening 304 from the outside of the shell 10. The rotating shaft 302 drives the cleaning rod 309 and the second mounting plate 307 to rotate. When the air moves to the surface of the filter screen 1 306, the filter screen 1 306 filters the air and absorbs the dust through the filter screen 1 306. At this time, the cleaning rod 309 can clean the surface of the filter screen 1 306 and sweep the dust off the surface of the filter screen 1 306. At this time, the air continues to move backward, and at the same time, the second mounting plate 307 drives the second filter screen 308 to rotate, so that the air passes through the second filter screen 308, and the air is filtered twice by the second filter screen 308. At this time, the air enters the bellows 30 through the opening 304, and finally enters the shell 10 through the bellows 30 to cool the inside of the shell 10.

[0041] When the device is not in use, Figure 3 At this time, the positions of filter screen 2 308 and filter screen 1 306 are staggered, the rear side of filter screen 1 306 is mounting plate 2 307, and the rear of mounting plate 1 305 is filter screen 2 308. At this time, mounting plate 2 307 can block filter screen 1 306 to prevent water from entering the interior of the housing 10 through filter screen 1 306, thereby preventing water vapor from entering the interior of the housing 10.

[0042] Working principle: When using the mathematical probability model demonstration device, a mounting plate 305, a filter screen 306, a mounting plate 307 and a filter screen 308 are set to facilitate blocking the opening 304 to prevent water vapor from entering the interior of the housing 10. A block 206 and a block bar 207 are set to facilitate fixing the wiring harness, thereby increasing the overall practicality.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mathematical probability model demonstration device, comprising a housing (10) configured as a hollow square shell, and an observation door (20) is embedded in one side of the surface of the housing (10); Features: A switch (201) is installed on the surface of the housing (10), and a demonstration area (202) is arranged inside the housing (10), the surface of the demonstration area (202) is fixedly connected to the ball outlet box (203), and an electromagnet (204) and a blocking plate (205) are embedded and installed on the surface of the demonstration area (202), and the end of the electromagnet (204) is connected to the blocking plate (205), the surface of the demonstration area (202) is connected to multiple rows of blocks (206), and the surface of the demonstration area (202) is connected to multiple gear bars (207); A filtering mechanism is arranged inside the housing (10), and the filtering mechanism comprises: a bellows (30) is installed inside the housing (10), and a motor (301) is installed inside the bellows (30), the end of the output shaft of the motor (301) is fixedly connected to a rotating shaft (302), and the surface of the rotating shaft (302) is fixedly connected to a fan (303), an opening (304) is embedded in the surface of the housing (10), and the inner wall of the opening (304) is fixedly connected to a mounting plate ( The first mounting plate (305) is provided with a plurality of filter screens (306) embedded in the surface of the first mounting plate (305), a second mounting plate (307) is rotatably mounted inside the opening (304), and a filter screen (308) is embedded in the surface of the second mounting plate (307), the second mounting plate (307) and the rotating shaft (302) are connected, and the rotating shaft (302) passes through the first mounting plate (305) and is connected to a cleaning rod (309), and the cleaning rod (309) is arranged on the outside of the housing (10).

2. The mathematical probability model demonstration device according to claim 1, characterized in that: The surface of the shell (10) is provided with a rotating locking mechanism, and the locking mechanism comprises: a rotating door (40) is embedded in the surface of the shell (10) and is symmetrically and rotatably installed, and a blocking block (401) is fixedly connected to the surface of the rotating door (40) on one side, and a mounting frame (402) is fixedly connected to the inner wall of the shell (10), and a plurality of locking grooves (403) are fixedly connected to the surface of the mounting frame (402).

3. The mathematical probability model demonstration device according to claim 1, characterized in that: The observation door (20) is configured as a transparent structure, and the observation door (20) is configured to correspond to the position of the demonstration area (202). The bottom of the ball outlet box (203) is configured with a hole, and the blocking plate (205) is configured at the bottom of the hole of the ball outlet box (203), and the blocking plate (205) is slidably connected to the ball outlet box (203), and the stop bar (207) is vertically arranged on the bottom surface of the demonstration area (202).

4. The mathematical probability model demonstration device according to claim 1, characterized in that: The rotating shaft (302) and the housing (10) are rotatably connected, and an air outlet is provided at the top of the bellows (30). The bellows (30) and the opening (304) are arranged at corresponding positions, and the opening (304) and the bellows (30) are through-connected.

5. The mathematical probability model demonstration device according to claim 1, characterized in that: The second mounting plate (307) is rotatably connected to the opening (304), and the positions of the second mounting plate (307) and the first mounting plate (305) are correspondingly arranged, and the second mounting plate (307) and the first mounting plate (305) are rotatably connected, and the positions of the second filter (308) and the first filter (306) are staggered.

6. The mathematical probability model demonstration device according to claim 1, characterized in that: The end of the cleaning rod (309) is in contact with the surface of the first mounting plate (305), and the first mounting plate (305) and the cleaning rod (309) are rotatably connected, and the rotating shaft (302) and the first mounting plate (305) are rotatably connected.

7. The mathematical probability model demonstration device according to claim 2, characterized in that: The blocking block (401) is arranged correspondingly to the position of the card slot (403), and the end of the blocking block (401) fits the position of the card slot (403). The rotating door (40) and the housing (10) are rotatably connected.

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