CN203965785U - A kind of English stave projectoscope - Google Patents

Abstract

The utility model relates to a teaching appliance, in particular to an English four-line grid projector. It includes a box, the box is provided with a bracket, and it is characterized in that a four-wire template, a condenser lens and a projection bulb are arranged on the coaxial line from front to back on the bracket, and the front side plate of the box is A projecting convex lens is provided, and a mask is provided outside the projecting convex lens, multiple groups of transparent parallel lines are horizontally provided on the four-line template, and a power line is connected to the projection bulb. The four-line template is installed on the box body through a slideway, and the four-line template is rectangular, and its size is larger than that of the condenser lens. The four-line template is made of non-transparent material, and the multiple sets of transparent parallel lines are hollow lines. The utility model has a compact structure, uses the principle of a projector to quickly project four-line grids on the blackboard, and has a standardized format; after writing, just turn off the power, which is convenient and quick.

Description

An English four-line grid projector

technical field

The utility model relates to a teaching appliance, in particular to an English four-line grid projector.

Background technique

In elementary English teaching, in order to write standard English on the blackboard, the teacher must first draw four lines on the blackboard. If you use a ruler to draw one by one, it is not only time-consuming and laborious, but also irregular.

Utility model content

The utility model aims at the deficiency of the above-mentioned prior art, and provides an English four-line grid projector capable of presenting grid lines on a blackboard immediately.

The technical solution of the utility model to solve the above-mentioned technical problems is as follows: an English four-line grid projector, including a box body, a bracket is arranged in the box body, and the feature is that the coaxial lines are sequentially arranged on the bracket from front to back. There are four-line templates, condenser mirrors and projection bulbs, a projecting convex lens is provided on the front side plate of the box, and a mask is provided outside the projecting convex lens, and multiple groups of transparent parallel lines are horizontally provided on the four-line template. , the projection bulb is connected with a power cord.

The beneficial effects of the utility model are: the structure is small and exquisite, and the principle of the projector is used to quickly project four-line grids on the blackboard, and the format is standardized; after writing, just turn off the power, which is convenient and quick.

On the basis of the above technical solutions, the utility model can also be improved as follows.

Further, the four-line template is installed on the box body through a slideway, the four-line template is rectangular, and its size is larger than that of the condenser lens.

The beneficial effect of adopting the above further solution is that the distance between parallel lines projected on the blackboard can be changed by adjusting the front and rear positions of the four-line template along the slideway. To meet the width requirements of different teachers and blackboards of different sizes for the four-line grid.

Further, the four-line template is made of non-transparent material, and the multiple sets of transparent parallel lines are hollow lines.

The beneficial effect of adopting the above further solution is that the relative brightness of the four-line grid can be increased.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the four-line formwork structure schematic diagram of the present utility model;

Fig. 3 is a projection principle diagram of the utility model.

In Figures 1 to 3, 1. projecting convex lens; 2. four-line template; 3. bracket; 4. condenser; 5. projection bulb; 6. battery; Slideway; 11, dial handle; 12, blackboard.

Detailed ways

The principles and features of the present utility model are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the utility model, and are not used to limit the scope of the utility model.

As shown in Figures 1 to 3, an English four-line grid projector includes a box body 7, a bracket 3 is provided in the box body 7, and four coaxial lines are arranged on the bracket 3 sequentially from front to back. Line template 2, condenser mirror 4 and projection bulb 5, the front side plate of the box body 7 is provided with a projecting convex lens 1, the outside of the projecting convex lens 1 is provided with a mask, and the four-line template 2 is horizontally provided with multiple groups The transparent parallel lines 2-1 are connected with power lines to the projection bulb 5 . The box is also provided with a rechargeable battery 6 for powering the projection bulb 5 , and the rechargeable battery 6 is connected to a charging socket 8 ; a switch 9 is also provided on the top of the box.

The four-wire template 2 is installed on the box body 7 through a slideway 10 , the four-wire template 2 is rectangular, and its size is larger than that of the condenser 4 . The box body 7 is provided with a handle 11 for moving the four-wire template 2 .

The four-line template 2 is made of non-transparent material, and the multiple groups of transparent parallel lines 2-1 are hollow lines.

The usage of the utility model is as follows: the utility model is placed on the podium, the angle is adjusted, and the switch is pressed, and the desired four-line grid can be obtained on the blackboard 12 .

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (1)

1. An English four-line grid projector comprises a casing, and a support is provided in the casing, and it is characterized in that, on the support, a four-line template, a condenser lens and a projection bulb are arranged on the coaxial line successively from front to back , the front side plate of the box body is provided with a projecting convex lens, the outside of the projecting convex lens is provided with a mask, the four-line template is horizontally provided with multiple sets of transparent parallel lines, and the projection bulb is connected to a power line ; The four-line template is installed on the box body through a slideway, the four-line template is rectangular, and its size is larger than the size of the condenser; the four-line template is a non-transparent material, and the multiple groups of transparent Parallel lines are hollow lines. the