CN105904888A - multifunctional teaching ruler - Google Patents

Abstract

The invention relates to a multifunctional teaching ruler, which comprises a linear ruler body and an angle protractor with angle scale lines, wherein the linear ruler body comprises a first ruler body and a second ruler body, the left end of the first ruler body is hinged to the left end of the second ruler body in a vertically-turnable manner, the bottom surface of the first ruler body is clamped with the top surface of the second ruler body, and the front side surfaces of the first ruler body and the second ruler body are respectively provided with length scale lines distributed along the length direction; an arc-shaped sliding groove distributed around the coordinate center is formed in the protractor, the protractor is fixed to the left end of the rear side face of the second ruler body, a fixing column rotating around the coordinate center is connected in the sliding groove in a sliding mode, an external thread is arranged on the fixing column, an indicating needle pointing to an angle scale mark is fixed to the top of the fixing column, one end of the fixing column is fixed to the left end of the rear side face of the first ruler body, and a fastening bolt is matched with the other end of the fixing column in a threaded. The invention can be used as a teaching rod and a ruler and used for angle measurement or drawing, and has various functions.

Description

multifunctional teaching ruler

technical field

The invention relates to the technical field of teaching tools, in particular to a multifunctional teaching ruler.

Background technique

In the teaching process of mathematics teachers, teaching rods, linear drawing rulers, and angle drawing rulers are often used. However, the three traditional teaching tools are independent, and there is no ruler that can meet the requirements of these three aspects at the same time.

Contents of the invention

The technical problem to be solved by the present invention is to provide a multifunctional teaching ruler to overcome the above disadvantages.

In order to solve the above-mentioned technical problems, the present invention provides the following technical solutions: a multifunctional teaching ruler, comprising a linear scale body and a protractor with angle scale lines, the linear scale body includes a rectangular parallelepiped first scale body, located on the first scale body The lower cuboid-shaped second ruler, the left end of the first ruler can be turned upside down and hinged to the left end of the second ruler, the bottom surface of the first ruler is engaged with the top surface of the second ruler, the The front sides of the first scale body and the second scale body are all provided with length scale lines distributed along the length direction; the protractor is provided with arc-shaped sliding grooves distributed around the coordinate center, and the protractor is fixed on the second scale. At the left end of the rear side of the body, a fixed column that rotates around the coordinate center is slidably connected in the sliding groove. The fixed column has external threads and an indicator needle pointing to the angle scale line is fixed on the top. One end of the fixed column is fixed at the On the left end of the rear side of a ruler body, the other end is threadedly connected with fastening bolts.

On the basis of the above scheme, the lengths of the first scale body and the second scale body are both 50-75 cm.

On the basis of the above scheme, the lengths of the first scale body and the second scale body are both 50 cm.

On the basis of the above scheme, the bottom surface of the first scale body extends downwards to form a clamping strip, the top surface of the second scale body is embedded with a clamping groove, and the first scale body realizes clamping through the cooperation of the clamping strip and the clamping groove in the second scale.

On the basis of the above solution, a semi-cylindrical extension extends upward from the top surface of the first ruler.

Compared with the prior art, the present invention has the beneficial effects that: the teaching ruler provided by the present invention, after the first ruler body is clamped on the second ruler body, the whole teaching ruler can be used as a teaching rod; The rear side of the ruler is laid flat so that the front side is placed on the top, and the second ruler body can be used as a ruler, and the reference length scale line is used to draw a straight line; it turns the first ruler body open, and the fixed column is convenient to rotate in the sliding groove. And the angle of rotation can be observed through the indicator needle, which can be used to measure the angle or be used for drawing the included angle to meet the needs of the relevant angle, and can be used for drawing lines on the longer included angle side.

Description of drawings

Fig. 1 is the use state diagram when the present invention acts as teaching rod;

Fig. 2 is the use state diagram when the present invention acts as ruler;

Fig. 3 is the use status diagram when the present invention is used for angle measurement or drawing;

Fig. 4 is the structural representation of the first scale body of the present invention;

Fig. 5 is the structural representation of the second ruler of the present invention;

Fig. 6 is a diagram showing the relationship between the protractor of the present invention and the first scale body and the second scale body.

The marks in the figure are: 1-protractor, 2-angle scale line, 3-first scale body, 4-second scale body, 5-length scale line, 6-sliding groove, 7-fixing column, 8-indicating needle, 9-fastening bolt, 10-card bar, 11-card slot, 12-extended part, 13-coordinate center.

detailed description

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Referring to Fig. 1 to Fig. 6, it can be seen that the multifunctional teaching ruler includes a linear scale body and a protractor 1 with an angle scale line 2, and the linear scale body includes a cuboid-shaped first scale body 3 positioned below the first scale body 3. Cuboid-shaped second ruler body 4, the top surface of the first ruler body 3 extends a semi-cylindrical extension 12, which is convenient to hold when serving as a teaching rod; the lengths of the first ruler body 3 and the second ruler body 4 are both 50-75cm, can be 50cm, 60cm, 75cm, 50cm is taken as an example here.

The left end of the first scale body 3 is reversibly hinged to the left end of the second scale body 4, the bottom surface of the first scale body 3 is engaged with the top surface of the second scale body 4, specifically: the first scale body The bottom surface of the ruler body 3 extends downward from the card strip 10, and the top surface of the second ruler body 4 is embedded with a card groove 11. Scale body 4. The front sides of the first scale body 3 and the second scale body 4 are provided with length scale marks 5 distributed along the length direction.

The protractor 1 is provided with an arc-shaped sliding groove 6 distributed around the coordinate center 13, the protractor 1 is fixed on the left end of the rear side of the second scale body 4, and a fixing device rotating around the coordinate center 13 is slidably connected in the sliding groove 6. Column 7, said fixed column 7 has an external thread and the top is fixed with an indicator needle 8 pointing to the angle scale line 2, one end of said fixed column 7 is fixed on the left end of the rear side of the first scale body 3, and the other end is threaded to cooperate There are fastening bolts 9.

In the teaching ruler provided by the present invention, after the first ruler body 3 is clamped on the second ruler body 4, the whole teaching ruler can be used as a teaching pole; the rear side of the teaching ruler is laid flat so that the front side is placed on the top, The second scale body 4 can be used as a ruler, and the reference length scale line 5 is used to draw a straight line; it rotates the first scale body 3 to open, and the fixed column 7 is convenient to rotate in the sliding groove 6, and can be observed through the indicator needle 8 To the angle of rotation, it is used to measure the angle or to draw the angle to meet the needs of the angle, and it can be used to draw the line of the longer angle side.

Claims (5)

1. Multifunctional teaching ruler, it is characterized in that: comprise linear ruler body, the protractor that has angle scale line, described linear ruler body comprises the first ruler body of cuboid shape, the second ruler body of cuboid shape that is positioned at the first ruler body below body, the left end of the first ruler body can be turned upside down and hinged to the left end of the second ruler body, the bottom surface of the first ruler body is engaged with the top surface of the second ruler body, the first ruler body, the second ruler body The front side of the scale body is provided with length scale lines distributed along the length direction; the protractor is provided with arc-shaped sliding grooves distributed around the coordinate center, and the protractor is fixed on the left end of the rear side of the second scale body. A fixed column that rotates around the coordinate center is slidably connected in the sliding groove. The fixed column has external threads and an indicator needle pointing to the angle scale line is fixed on the top. One end of the fixed column is fixed on the left end of the rear side of the first scale body. , The threaded connection at the other end is matched with fastening bolts. 2. The multifunctional teaching ruler according to claim 1, characterized in that: the lengths of the first ruler body and the second ruler body are both 50-75cm. 3. The multifunctional teaching ruler according to claim 2, wherein the lengths of the first ruler body and the second ruler body are both 50 cm. 4. The multi-functional teaching ruler according to claim 1, characterized in that: the bottom surface of the first ruler body extends downwards to form a card strip, the top surface of the second ruler body is embedded with a card slot, and the first ruler body The body is clipped to the second ruler body through the cooperation of the clip bar and the clip slot. 5. The multifunctional teaching ruler according to claim 1, characterized in that: a semi-cylindrical extension extends upward from the top surface of the first ruler body.