Adjustable second-order differential equation derivation device

Abstract

The invention provides an adjustable second-order differential equation derivation device and belongs to the technical field of blackboards. The device comprises a demonstration board, vertical rods, supporting legs, rolling wheels, a reinforcing cross rod, a gel pen storage box, an ink dust receiving assembly, an auxiliary stable pedal assembly, and a dust sweeping assembly. By means of the ink dust receiving assembly, ink dust generated during writing and wiping can be received; by means of the auxiliary stable pedal assembly, the stability of the whole device can be improved by treading a pedal and utilizing rigid connection between the pedal and the whole device, the demonstration board does not shake during writing, and the comfort degree and definition of writing are improved; by means of the dust sweeping assembly, ink dust borne by a fixing frame can be swept; the gel pen storage box is divided into two areas by a partition plate, so that gel pens which can be used and gel pens which cannot be used can be separately stored, and the gel pens are convenient to take and use.

Description

technical field

[0001] The invention belongs to the technical field of blackboards, in particular to an adjustable second-order differential equation derivation device. Background technique

[0002] A second order differential equation includes an independent variable and a dependent variable. In mathematical expressions, x is usually used to represent the independent variable, and y is used to represent the dependent variable. A whiteboard is a presentation tool used in lectures or discussions. Divided into movable and immovable in form, the movable whiteboard is usually fixedly connected with a pair of rollers at the bottom of the whiteboard support frame for easy movement. Most of these movable whiteboards are used in discussion scenarios ; Most immovable whiteboards are fixed on the wall, such as the whiteboard fixed on the classroom wall. The existing movable whiteboard has the following technical problems during use. One is that even if the rollers at the bottom of...

Examples

Embodiment 1

[0036] Embodiment 1 introduces an adjustable second-order differential equation derivation device, such as Figure 1-3 As shown, an adjustable second-order differential equation derivation device includes a demonstration board 1, a vertical rod 2, a support foot 3, a roller 4 and a reinforcing cross bar 5, and the derivation device also includes a gel pen storage box 6, an ink ash holder Component 7, auxiliary stable pedal component 8 and ash sweeping component 9;

[0037] The lower surface of the supporting foot 3 is fixedly connected with a pair of rollers 4, the upper surface of the supporting foot 3 is fixedly connected with a vertical rod 2, and the vertical rod 2 is fixedly connected at the middle position of the upper surface of the supporting foot 3, and the pair of rollers 4 is connected with the vertical rod 2. Symmetrically distributed on the lower surface of the supporting foot 3;

[0038] The outer fixing sleeve of the demonstration board 1 is provided with a fix...

Embodiment 2

[0044] Embodiment 2 is an improvement on the basis of Embodiment 1, as Figure 8-10 As shown, wherein, the fixed frame 10 is provided with a through hole 17 that runs through the fixed frame 10, and the through hole 17 extends horizontally from the left side to the right side along the fixed frame 10. 902, spring 2 903, elastic uniform distribution plate 904 and baffle plate 905, the connecting cross bar 902 runs through the through hole 17, one end of the connecting cross bar 902 is exposed on the front of the demonstration board 1, and the other end of the connecting cross bar 902 is exposed on the demonstration board 1 The back side of the connecting cross bar 902 located at the front of the demonstration board 1 is fixedly connected with a sweeping brush 901, the sweeping brush 901 is located above the connecting cross bar 902, the brush part of the sweeping brush 901 is in close contact with the fixed frame 10, and the connecting cross The rod 902 is located on the back o...

Embodiment 3

[0047] Embodiment 3 is an improvement on the basis of Embodiment 1, as Figure 10 as shown in Figure 11 As shown, the gel pen storage box 6 is divided into two areas by a vertical partition 12, one area is used to store the gel pens that are still in use, and the other area is used to store the gel pens that have run out of ink. The interior of the area for accommodating gel pens that are still in use is divided into independent areas by a plurality of partitions 12 in a criss-cross pattern.

[0048] In this embodiment, the gel pen storage box 6 is divided into two regions by using a partition 12, so that the gel pens that can still be used and the gel pens that are no longer usable can be stored separately, which is convenient for access; Separate the storage area of ​​gel pens that are still usable into individual storage spaces, which can prevent the gel pens from piling up.

technical field

[0001] The invention belongs to the technical field of blackboards, in particular to an adjustable second-order differential equation derivation device. Background technique

[0002] A second order differential equation includes an independent variable and a dependent variable. In mathematical expressions, x is usually used to represent the independent variable, and y is used to represent the dependent variable. A whiteboard is a presentation tool used in lectures or discussions. Divided into movable and immovable in form, the movable whiteboard is usually fixedly connected with a pair of rollers at the bottom of the whiteboard support frame for easy movement. Most of these movable whiteboards are used in discussion scenarios ; Most immovable whiteboards are fixed on the wall, such as the whiteboard fixed on the classroom wall. The existing movable whiteboard has the following technical problems during use. One is that even if the rollers at the bottom of...

Examples

Embodiment 1

[0036] Embodiment 1 introduces an adjustable second-order differential equation derivation device, such as Figure 1-3 As shown, an adjustable second-order differential equation derivation device includes a demonstration board 1, a vertical rod 2, a support foot 3, a roller 4 and a reinforcing cross bar 5, and the derivation device also includes a gel pen storage box 6, an ink ash holder Component 7, auxiliary stable pedal component 8 and ash sweeping component 9;

[0037] The lower surface of the supporting foot 3 is fixedly connected with a pair of rollers 4, the upper surface of the supporting foot 3 is fixedly connected with a vertical rod 2, and the vertical rod 2 is fixedly connected at the middle position of the upper surface of the supporting foot 3, and the pair of rollers 4 is connected with the vertical rod 2. Symmetrically distributed on the lower surface of the supporting foot 3;

[0038] The outer fixing sleeve of the demonstration board 1 is provided with a fix...

Embodiment 2

[0044] Embodiment 2 is an improvement on the basis of Embodiment 1, as Figure 8-10 As shown, wherein, the fixed frame 10 is provided with a through hole 17 that runs through the fixed frame 10, and the through hole 17 extends horizontally from the left side to the right side along the fixed frame 10. 902, spring 2 903, elastic uniform distribution plate 904 and baffle plate 905, the connecting cross bar 902 runs through the through hole 17, one end of the connecting cross bar 902 is exposed on the front of the demonstration board 1, and the other end of the connecting cross bar 902 is exposed on the demonstration board 1 The back side of the connecting cross bar 902 located at the front of the demonstration board 1 is fixedly connected with a sweeping brush 901, the sweeping brush 901 is located above the connecting cross bar 902, the brush part of the sweeping brush 901 is in close contact with the fixed frame 10, and the connecting cross The rod 902 is located on the back o...

Embodiment 3

[0047] Embodiment 3 is an improvement on the basis of Embodiment 1, as Figure 10 as shown in Figure 11 As shown, the gel pen storage box 6 is divided into two areas by a vertical partition 12, one area is used to store the gel pens that are still in use, and the other area is used to store the gel pens that have run out of ink. The interior of the area for accommodating gel pens that are still in use is divided into independent areas by a plurality of partitions 12 in a criss-cross pattern.

[0048] In this embodiment, the gel pen storage box 6 is divided into two regions by using a partition 12, so that the gel pens that can still be used and the gel pens that are no longer usable can be stored separately, which is convenient for access; Separate the storage area of ​​gel pens that are still usable into individual storage spaces, which can prevent the gel pens from piling up.

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