Random selection questioning device

Abstract

The utility model discloses a random selection questioning device, which comprises a base plate, the rear side of the upper surface of the base plate is fixedly connected with an inverted L-shaped frame, the opposite surfaces of the horizontal part of the inverted L-shaped frame and the base plate are both rotatably connected with rotating wheels, and the circumferential surfaces of the two rotating wheels are both provided with a plurality of selection numbers which are uniformly distributed. And the front side of the upper surface of the chassis is provided with a selection plate matched with a plurality of selection numbers on the upper and lower sides. The upper rotating wheel represents the row number, the lower rotating wheel represents the column number, then the two rotating wheels are rotated respectively, the two rotating wheels are gradually decelerated under the attraction effect of the magnetic attraction assembly till stopping, and after the rotating wheels stop, the selection numbers on the circumferential faces of the rotating wheels correspond to the positions of the selection plates under the positioning effect of the magnetic attraction assembly; positioning of a certain row and a certain column can be obtained by respectively reading the selected numbers on the upper and lower sides, then roll call is carried out, the whole using process is rapid and convenient, meanwhile, the size is small, carrying is convenient, and practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of teaching tools, in particular to a random selection questioner. Background Art

[0002] Teachers need to teach the professional knowledge systematically to the students. At this stage, in order to improve the knowledge acceptance in class and obtain students' learning situation, it is necessary to ask students questions and interact with teachers and students. At this time, it is necessary to call the roll on students.

[0003] However, currently, most roll call methods involve teachers using a name list to call the students by name and ask them questions. This process is biased by the teacher and is affected by the teacher's subjective thoughts, resulting in different probabilities for each student to be called, which cannot increase students' tension and enthusiasm. Moreover, the random roll call devices in the prior art are mostly large turntables, which are not easy for teachers to carry and move in daily teaching work, and are therefore not very practical. Utility Model Content

[0004] The purpose of the present invention is to provide a random selection questioner in order to solve the above problems, as described below.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The utility model provides a random selection questioner, comprising a chassis, an inverted L-shaped frame fixedly connected to the rear side of the upper surface of the chassis, a rotating wheel rotatably connected to the horizontal portion of the inverted L-shaped frame and the opposite surface of the chassis, a plurality of evenly distributed selection numbers are arranged on the circumferential surfaces of the two rotating wheels, a selection plate adapted to the plurality of selection numbers on the upper and lower sides is arranged on the front side of the upper surface of the chassis, and a magnetic attraction component for fixing the rotation position of the rotating wheel is arranged on the horizontal portion of the inverted L-shaped frame and the opposite surface of the chassis.

[0007] When using the above-mentioned random selection questioner, the chassis is placed on the desktop, the upper wheel indicates the number of rows, and the lower wheel indicates the number of columns, and then the two wheels are rotated separately. Under the suction of the magnetic suction component, the two wheels gradually slow down until they stop. When the wheels stop, the selection numbers on their circumferential surfaces correspond to the positions of the selection plates under the positioning action of the magnetic suction component. The selection numbers above and below are read separately to obtain the positioning of a row and a column, and then roll call can be performed.

[0008] Preferably, the diameter of the chassis is 20-25 cm, and the interior of the two rotating wheels is a hollow structure, and a handle is fixedly connected to the surface of the horizontal portion of the inverted L-shaped frame.

[0009] Preferably, four suction cups evenly distributed around the circumference of the chassis are fixedly connected to the bottom surface of the chassis.

[0010] Preferably, a plurality of shielding cloths corresponding to the selected numbers are detachably connected to the circumferential surface of the rotating wheel via a magnetic connection piece, and the shielding cloths are located on one side of the selected numbers.

[0011] Preferably, the magnetic connection member comprises magnetic sheets fixedly connected to the four corners of the shielding cloth, and an annular iron sheet magnetically connected to the magnetic sheets is provided on the circumferential surface of the rotating wheel.

[0012] Preferably, two selection boxes are provided on the selection board, and the two selection boxes are respectively adapted to the height of the upper and lower selection numbers.

[0013] Preferably, the magnetic attraction component includes a magnet fixedly connected to the horizontal part of the inverted L-shaped frame and the chassis, and the surfaces of the two rotating wheels are fixedly connected with a plurality of iron sheets magnetically connected to the magnets, and the spacing between the iron sheets and the magnets is 5-10mm, and the plurality of iron sheets are evenly distributed on the circumference with the axis of the rotating wheel as the reference, and the plurality of iron sheets correspond one-to-one to the plurality of selected numbers.

[0014] Preferably, a plurality of evenly distributed shifting blocks are provided on the upper ends of the circumferential surfaces of the two rotating wheels.

[0015] The beneficial effects are:

[0016] The upper wheel represents the number of rows and the lower wheel represents the number of columns, and then the two wheels are rotated separately. Under the suction of the magnetic component, the two wheels gradually slow down until they stop. When the wheels stop, the selection numbers on their circumferential surfaces correspond to the positions of the selection plates under the positioning action of the magnetic component. The positioning of a row and a column can be obtained by reading the selection numbers above and below respectively, and then the roll call can be performed. The whole use process is quick and convenient, and at the same time, the size is small, easy to carry, and the practicality is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a three-dimensional diagram of the utility model;

[0019] Figure 2 It is a split three-dimensional diagram of the utility model when viewed from above.

[0020] The following are the descriptions of the reference numerals:

[0021] 1. Chassis; 2. Inverted L-shaped frame; 3. Rotating wheel; 4. Selection board; 5. Select number; 6. Masking cloth; 7. Magnetic sheet; 8. Iron sheet; 9. Magnet; 10. Dial block; 11. Selection frame; 12. Suction cup. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0023] See also Figure 1-Figure 2 As shown, the utility model provides a random selection questioner, including a chassis 1, an inverted L-shaped frame 2 is fixedly connected to the rear side of the upper surface of the chassis 1, a horizontal portion of the inverted L-shaped frame 2 and an opposite surface of the chassis 1 are rotatably connected to a rotating wheel 3, a plurality of evenly distributed selection numbers 5 are arranged on the circumferential surfaces of the two rotating wheels 3, a selection plate 4 adapted to the plurality of selection numbers 5 on the upper and lower sides is arranged on the front side of the upper surface of the chassis 1, and a magnetic attraction component for fixing the rotation position of the rotating wheel 3 is arranged on the horizontal portion of the inverted L-shaped frame 2 and the opposite surface of the chassis 1.

[0024] As an optional embodiment, the diameter of the chassis 1 is 20-25 cm, and the interior of the two rotating wheels 3 is a hollow structure. A handle is fixedly connected to the horizontal surface of the inverted L-shaped frame 2, which can reduce the overall size of the questioner. At the same time, the hollow design can reduce the weight and improve portability.

[0025] Specifically, the bottom surface of the chassis 1 is fixedly connected with four suction cups 12 which are evenly distributed around the circumference of the chassis 1 with its axis as a reference. The chassis 1 can be fixed on a flat tabletop by the negative pressure of the suction cups 12, thereby improving the stability of placement.

[0026] As an optional embodiment, a plurality of shielding cloths 6 corresponding to the selected numbers 5 are detachably connected to the circumferential surface of the rotating wheel 3 through magnetic connectors, and the shielding cloths 6 are located on one side of the selected number 5. The magnetic connectors include magnetic sheets 7 fixedly connected to the four corners of the shielding cloths 6, and an annular iron sheet magnetically connected to the magnetic sheets 7 is provided on the circumferential surface of the rotating wheel 3. The shielding cloth 6 is moved to the selected number 5 and is magnetically fixed to the annular iron sheet on the circumferential surface of the rotating wheel 3 by the magnetic sheet 7, indicating that the blocked number is not used. The non-existent rows and columns can be blocked according to the actual number of rows and columns in the class, thereby improving practicality.

[0027] Specifically, two selection boxes 11 are provided on the selection plate 4 , and the two selection boxes 11 are respectively adapted to the heights of the upper and lower selection numbers 5 , so that the selection numbers 5 can be effectively observed and read through the selection boxes 11 .

[0028] As an optional embodiment, the magnetic attraction component includes a magnet 9 fixedly connected to the horizontal part of the inverted L-shaped frame 2 and the chassis 1, and a plurality of iron sheets 8 magnetically connected to the magnet 9 are fixedly connected to the surfaces of the two wheels 3, and the spacing between the iron sheets 8 and the magnet 9 is 5-10mm. The plurality of iron sheets 8 are evenly distributed on the circumference with the axis of the wheel 3 as the reference, and the plurality of iron sheets 8 correspond one-to-one to the plurality of selection numbers 5. When the wheel 3 rotates, the plurality of iron sheets 8 are magnetically attracted to the magnet 9 one by one to slow down the wheel 3 until it stops. When the wheel 3 stops, a certain iron sheet 8 is adsorbed and positioned by the magnet 9, and at this time, the selection number 5 on the circumferential surface corresponds to the angle of the selection plate 4.

[0029] Specifically, a plurality of evenly distributed shifting blocks 10 are provided on the upper ends of the circumferential surfaces of the two rotating wheels 3 , so as to facilitate the rotating wheels 3 to be driven to rotate by the shifting blocks 10 .

[0030] With the above structure, when in use, the chassis 1 is placed on the desktop, with the upper rotating wheel 3 indicating the number of rows and the lower rotating wheel 3 indicating the number of columns, and then the two rotating wheels 3 are rotated respectively. Under the suction of the magnetic suction component, the two rotating wheels 3 gradually slow down until they stop. When the rotating wheels 3 stop, under the positioning action of the magnetic suction component, the selection number 5 on the circumferential surface thereof corresponds to the position of the selection plate 4. The positioning of a row and a column can be obtained by reading the selection numbers 5 above and below respectively, and then roll call can be performed.

[0031] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A random selection questioner, characterized in that: The invention comprises a chassis (1), wherein an inverted L-shaped frame (2) is fixedly connected to the rear side of the upper surface of the chassis (1), a rotating wheel (3) is rotatably connected to the horizontal part of the inverted L-shaped frame (2) and the opposite surface of the chassis (1), a plurality of evenly distributed selection numbers (5) are provided on the circumferential surface of the two rotating wheels (3), a selection plate (4) adapted to the plurality of selection numbers (5) on the upper and lower sides is provided on the front side of the upper surface of the chassis (1), and a magnetic attraction component for fixing the rotation position of the rotating wheel (3) is provided on the horizontal part of the inverted L-shaped frame (2) and the opposite surface of the chassis (1).

2. A random selection questioner according to claim 1, characterized in that: The diameter of the chassis (1) is 20-25 cm, and the interior of the two rotating wheels (3) is a hollow structure. A handle is fixedly connected to the surface of the horizontal portion of the inverted L-shaped frame (2).

3. A random selection questioner according to claim 1, characterized in that: The bottom surface of the chassis (1) is fixedly connected with four suction cups (12) which are evenly distributed around the circumference of the chassis (1) with its axis as the reference.

4. A random selection questioner according to claim 1, characterized in that: A plurality of shielding cloths (6) corresponding to the selected numbers (5) are detachably connected to the circumferential surface of the rotating wheel (3) via a magnetic connection piece, and the shielding cloths (6) are located on one side of the selected number (5).

5. A random selection questioner according to claim 4, characterized in that: The magnetic connection member comprises magnetic sheets (7) fixedly connected to the four corners of the shielding cloth (6), and an annular iron sheet magnetically connected to the magnetic sheets (7) is provided on the circumferential surface of the rotating wheel (3).

6. A random selection questioner according to claim 1, characterized in that: The selection board (4) is provided with two selection boxes (11), and the two selection boxes (11) are respectively adapted in height to the upper and lower selection numbers (5).

7. A random selection questioner according to claim 1, characterized in that: The magnetic attraction component comprises a magnet (9) fixedly connected to the horizontal part of the inverted L-shaped frame (2) and the chassis (1); the surfaces of the two rotating wheels (3) are fixedly connected with a plurality of iron sheets (8) magnetically connected to the magnet (9); the spacing between the iron sheets (8) and the magnet (9) is 5-10 mm; the plurality of iron sheets (8) are evenly distributed around the circumference with the axis of the rotating wheel (3) as the reference circle; and the plurality of iron sheets (8) correspond one to one to the plurality of selected numbers (5).

8. A random selection questioner according to claim 1, characterized in that: The upper ends of the circumferential surfaces of the two rotating wheels (3) are each provided with a plurality of evenly distributed shifting blocks (10).

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