CN210983896U

CN210983896U - Addition and subtraction demonstrator

Info

Publication number: CN210983896U
Application number: CN201820044706.1U
Authority: CN
Inventors: 侯祥印
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-01-11
Filing date: 2018-01-11
Publication date: 2020-07-10
Anticipated expiration: 2028-01-11

Abstract

An addition and subtraction demonstrator comprises a base body, wherein two supports are arranged at the upper end of the base body, the two supports are arranged in the upper end surface of the base body in an opposite direction, the two supports are respectively provided with 5 semitransparent balls, each support comprises a supporting rod, a U-shaped frame is fixedly arranged at the upper end of each supporting rod, a cross rod is fixedly arranged at the upper end opening of each U-shaped frame, 5 swing rods are arranged on the cross rods at equal intervals, the swing rods are rotatably connected with the cross rods through damping rings, the tail ends of the swing rods are inserted into the semitransparent balls, the rear side of the base body is provided with a battery tank, the upper end surface of the base body is positioned between the two supports and is provided with a plurality of projection lamps, each projection lamp is connected together in parallel, the base body is also provided with a switch, the front side of the base body is provided with two sliding grooves, a drawing plate is arranged in each sliding groove in a guiding manner, it can increase study taste, and the demonstration of being convenient for improves the teaching effect.

Description

Addition and subtraction demonstrator

The technical field is as follows:

the utility model relates to a mathematics teaching aid field, concretely relates to addition subtraction demonstrator.

Background art:

at present, in mathematical education, especially to the children of lower grade, need begin with the plus-minus method within ten, the teacher speaks, children listen, passive teaching and learning, it is difficult to mutually help with the teacher in classroom, study uninteresting, in order to help students to understand, the teacher often needs to use the teaching aid of various models, but current mathematical arithmetic teaching aid is bulky, the cost is high, it is inconvenient to carry, the demonstration effect is poor, how to reduce the teaching aid volume, satisfy pupil's plus-minus method operation within 10, it is an effective way of education worker for improving students to the mathematical operation and calculation.

The invention content is as follows:

the utility model aims at overcoming the weak point that above-mentioned prior art exists, and provide an addition and subtraction demonstration ware, the demonstration of being convenient for improves the teaching effect.

In order to solve the problem existing in the background art, the utility model adopts the following technical scheme: an addition and subtraction demonstrator comprises a base body, wherein two supports are arranged at the upper end of the base body, the two supports are arranged in the upper end surface of the base body in an opposite direction, 5 semitransparent balls are respectively arranged on the two supports, each support comprises a supporting rod, a U-shaped frame is fixedly arranged at the upper end of each supporting rod, a cross rod is fixedly arranged at an upper end opening of each U-shaped frame, 5 swing rods are arranged on the cross rods at equal intervals, the swing rods are rotatably connected with the cross rods through damping rings, the semitransparent balls are inserted at the tail ends of the swing rods, a battery tank is arranged at the rear side of the base body, a plurality of projection lamps are arranged between the two supports at the upper end surface of the base body, the projection lamps are connected together in a parallel mode, a switch is further arranged on the base body, batteries in the battery tank and the projection lamps are electrically connected through wires, two sliding grooves are arranged at the front side of the, one end of the drawing plate, which is far away from the bracket, is provided with a drawing handle.

The color of the 5 semitransparent balls on the left side support on the seat body is the same, and the characters of '1', '2', '3', '4' and '5' are marked in sequence, the color of the 5 semitransparent balls on the right side support on the seat body is the same, and the characters of 'one', 'two', 'three', 'four' and 'five' are marked in sequence, the colors of the semitransparent balls on the left side support and the right side support are different, and the semitransparent balls are provided with digital characters, so that the semitransparent balls are convenient to identify and store.

The lateral wall of the damping ring is provided with a through hole, the outer side of the through hole is provided with a plug, a lock head and a pressure spring are arranged in the through hole, the pressure spring is located between the lock head and the plug, the lock head is a cylinder with a ball head at the front end, the rear end of the cylinder is abutted against the pressure spring, and the ball head of the cylinder is abutted against the rod body of the cross rod.

The two supports are arranged on the base body in a diagonal direction, the upper end face of the base body is fixedly provided with a hinged seat, the lower end of the supporting rod is connected with the hinged seat through a pin shaft, one end, extending out of the U-shaped hinged seat, of the pin shaft is connected with a claw nut in a rotating mode, the base body is further provided with two U-shaped clamping buckles, the center lines of the frame and the clamping buckles are arranged in parallel, and the outer side face of the supporting rod is matched with the inner arc face of the clamping buckle. The utility model discloses be convenient for accomodate, when teaching work is accomplished, can take off translucent ball from the pendulum rod end to correspond and place on corresponding pull board, not hard up goat's horn nut swings branch to the arc wall that the joint was buckled, folds in the pendulum rod simultaneously, makes pendulum rod and branch overlap together, reduces whole occupation space.

In the use, when carrying out the addition operation, for example "3 +3= X", can swing arbitrary three in the pendulum rod in the U-shaped frame in the left side to the right side, swing arbitrary three left side in the pendulum rod in the U-shaped frame in the right side simultaneously, make to insert and establish the terminal translucent ball of pendulum rod and be located the projecting lamp directly over, open the switch, the illumination mapping that the projecting lamp throws is on translucent ball, at this moment, can let the student go to count and have the number of bright translucent ball, the utility model discloses be convenient for demonstrate 10 within the operation of plus-minus method, through the result of bright demonstration digit plus-minus, be convenient for demonstrate, improve teaching effect.

Description of the drawings:

fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic sectional view taken along line A-A;

fig. 3 is a schematic diagram of the circuit structure of the present invention.

In the figure: 1. the novel projection lamp comprises a semitransparent ball, a swing rod 2, a damping ring 3, a U-shaped frame 4, a support rod 5, a hinge seat 6, a projection lamp 7, a drawing plate 8, a clamping buckle 9, a switch 10, an arc-shaped groove 11, a plug 12, a lock head 13, a cross rod 14 and a seat body 15.

The specific implementation mode is as follows:

referring to fig. 1-3, an addition and subtraction demonstrator includes a base, two supports are disposed at an upper end of the base 15, the two supports are disposed facing each other at the upper end of the base, 5 translucent balls 1 are disposed on each of the two supports, each support includes a support rod 5, a U-shaped frame 4 is fixedly disposed at an upper end of the support rod 5, a cross rod 14 is fixedly disposed at an upper opening of the U-shaped frame 4, 5 swing rods 2 are disposed on the cross rod 14 at equal intervals, the swing rods 2 are rotatably connected to the cross rod 14 through a damping ring 3, ends of the swing rods 2 are inserted into the translucent balls 1, a battery slot is disposed at a rear side of the base 15, a plurality of projection lamps 7 are disposed between the two supports at an upper end of the base 15, the projection lamps are connected together, the base 15 is further provided with a switch, the switch 10, a battery in the battery slot and the projection lamps are electrically connected through wires, two sliding slots are disposed at a front side of the base 15, a drawing plate 8 is disposed in the sliding slots, 5 arc slots 11 for placing the translucent balls 1 are disposed on the drawing plate 8, one end of the drawing plate which is disposed far away from the supports is provided with a drawing handle, a drawing circuit diagram of 357, a power supply circuit, a resistor 355636, a resistor.

The two supports are arranged on the base body 15 in a diagonal direction, the upper end face of the base body 15 is fixedly provided with a hinged base 6, the lower end of the supporting rod 5 is connected with the hinged base 6 through a pin shaft, one end, extending out of the hinged base, of the pin shaft is connected with a claw nut 16 in a rotating mode, the base body 15 is further provided with two U-shaped clamping buckles 9, the central lines of the U-shaped frames 4 and the clamping buckles 9 are arranged in parallel, and the outer side face of the supporting rod 5 is matched with the inner arc face of the clamping buckle 9.

The color of the 5 semitransparent balls 1 on the left side support on the seat body 15 is the same, and the characters of 1, 2, 3, 4 and 5 are marked in sequence, the color of the 5 semitransparent balls 1 on the right side support on the seat body 15 is the same, and the characters of one, two, three, four and five are marked in sequence, and the colors of the semitransparent balls 1 on the left side support and the right side support are different.

The side wall of the damping ring 3 is provided with a through hole, the outer side of the through hole is provided with a plug 12, a lock head 13 and a pressure spring are arranged in the through hole, the pressure spring is positioned between the lock head and the plug 12, the lock head 13 is a cylinder with a ball head at the front end, the rear end of the cylinder is abutted against the pressure spring, and the ball head of the cylinder is abutted against the rod body of the cross rod 14.

In the using process, when addition operation is carried out, for example, "3 +3= X", any three of the swing rods in the left-side U-shaped frame 4 can be swung to the right side, any three of the swing rods in the right-side U-shaped frame 4 can be swung to the left side, the semitransparent ball 1 inserted at the tail end of the swing rod 2 is positioned right above the projection lamp 7, the switch is turned on, the illumination projected by the projection lamp 7 is mapped on the semitransparent ball 1, at the moment, students can count the number of the semitransparent balls with light, and at this moment, 6 semitransparent balls 1 are positioned right above the projection lamp 7; when the subtraction operation is performed, for example, "6-2 = X", any two translucent balls 1 located in the middle position may be swung to the left or to the right to return to the original U-shaped frame 4, and at this time, 4 translucent balls 1 are located right above the projector, and the number of translucent balls with light may be counted by the student.

Claims

1. The utility model provides an addition and subtraction demonstrator, includes the pedestal, and the upper end of pedestal (15) is equipped with two supports, and two supports respectively are provided with 5 translucent balls (1), its characterized in that in the up end of pedestal to setting up, on two supports: the support comprises a support rod (5), a U-shaped frame (4) is fixedly arranged at the upper end of the support rod (5), a transverse rod (14) is fixedly arranged at an upper end opening of the U-shaped frame (4), 5 swing rods (2) are arranged at equal intervals on the transverse rod (14), the swing rods (2) are rotatably connected with the transverse rod (14) through damping rings (3), the tail ends of the swing rods (2) are inserted with semitransparent balls (1), a battery groove is formed in the rear side of a seat body (15), a plurality of projection lamps (7) are arranged between the two supports at the upper end face of the seat body (15), the projection lamps (7) are connected together in parallel, a switch is further arranged on the seat body (15), the switch (10), the batteries in the battery groove and the projection lamps (7) are electrically connected through wires, two sliding grooves are formed in the front side of the seat body (15), a drawing plate (8) is arranged in the sliding grooves in a guiding mode, 5 arc-shaped grooves (11) for placing, one end of the drawing plate (8) far away from the bracket is provided with a drawing handle.

2. The addition-subtraction presenter of claim 1 wherein: the color of the 5 semitransparent balls (1) on the left side support on the seat body (15) is the same, and the characters of '1', '2', '3', '4' and '5' are marked in sequence, the color of the 5 semitransparent balls (1) on the right side support on the seat body (15) is the same, and the characters of 'one', 'two', 'three', 'four' and 'five' are marked in sequence, and the colors of the semitransparent balls (1) on the left side support and the right side support are different.

3. The addition-subtraction presenter of claim 1 wherein: two supports are diagonal direction setting on pedestal (15), and the up end of pedestal (15) is fixed to be equipped with articulated seat (6), and the lower extreme of branch (5) is connected with articulated seat (6) through the round pin axle, and the one end that the round pin axle stretches out articulated seat connects a goat's horn nut (16) soon, still is equipped with joint knot (9) of two U-shapes on pedestal (15), the central line parallel arrangement of (9) is detained with the joint to U-shaped frame (4), and the interior cambered surface looks adaptation of (9) is detained with the joint to the lateral surface of branch (5).

4. The addition-subtraction presenter of claim 1 wherein: set up a through-hole on the lateral wall of damping ring (3), the outside of through-hole is equipped with plug (12), is equipped with tapered end (13) and pressure spring in the through-hole, and the pressure spring is located between tapered end and plug (12), tapered end (13) are the cylinder that a front end was equipped with the bulb, and the rear end and the pressure spring of cylinder support and lean on, and the bulb portion of cylinder supports with the body of rod of horizontal pole (14) and leans on.