CN218723618U

CN218723618U - Protractor convenient for reading

Info

Publication number: CN218723618U
Application number: CN202222670159.7U
Authority: CN
Inventors: 凌一可; 徐明夏
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2023-03-24
Anticipated expiration: 2032-10-11

Abstract

The utility model relates to a teaching aid technical field especially relates to a protractor of convenient reading, including the protractor body, this body front surface fixed connection of protractor is connected with the installation axle, the installation axle is located the centre of a circle of this body front surface scale part of protractor, the outside of installation axle is rotated through the bearing and is connected with the sliding seat. Compared with the prior art, through the sliding seat that sets up, extension rod and movable block, the device of being convenient for can carry out the adjustment of a movable block and No. two movable block positions through two extension rods in the use, so that carry out the adjustment of protractor measurement according to the figure, then rotate the sliding seat and drive the movable rod and rotate on the protractor body, thereby can be more convenient realize the angular surveying and the reading of different length sidelines, avoid destroying original figure.

Description

Protractor convenient for reading

Technical Field

The utility model relates to a teaching aid technical field especially relates to a protractor of convenient reading.

Background

The protractor is as one of the instrument of drawing, can draw the angle that will as required to can also be more surely read out directly perceivedly as the length ruler, and draw the circle inch of regulation size, the protractor can divide into teaching protractor and ordinary protractor according to application range, and the drawing is measured on the teaching protractor mainly used blackboard, consequently needs great volume, in order to guarantee that the figure can audio-visually impart knowledge to students, guarantees the teaching quality.

In the measurement process of the teaching protractor shown in the authorized bulletin No. CN210833295U, when two side lines of a measurement angle are short and the protractor scale cannot be attached to a side line, an extension line needs to be drawn so as to measure the angle, the operation not only affects the measurement efficiency of the protractor, but also destroys an original figure, and therefore the protractor convenient to read is provided.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model provides a make things convenient for protractor of reading has the function of convenient measurement reading to improve the measurement of efficiency among the measurement process, and still can not destroy original figure.

The technical scheme of the utility model is that:

the utility model provides a protractor of convenient reading, includes the protractor body, this body front surface fixedly connected with of protractor installs the axle, it is located this body front surface scale part's of protractor center of circle to install the axle, the outside of installation axle is rotated through the bearing and is connected with the sliding seat, protruding type groove, two have all been seted up to one side of sliding seat and protractor body the front end sliding connection respectively in protruding type groove has the extension rod, the front end one side fixedly connected with movable block No. two of extension rod, the back is calculated one side fixedly connected with movable block of extension rod, the opposite side fixedly connected with movable rod of sliding seat.

In a further technical scheme, the front end of installation axle runs through the sliding seat and threaded connection has the tapered base, the inboard fixedly connected with installation cover of front end of No. two movable blocks.

In a further technical scheme, all inlay on the horizontal central line of a movable block and No. two movable block rear surfaces and have the pointer, the opening that runs through the movable rod top is seted up to the rear surface of movable rod, zero scale mark parallel and level on open-ended bottom inner wall and the protractor body.

In a further technical scheme, one end of the extension rod is fixedly connected with a limiting block, and the limiting block is connected to the inner side of the wider part of the convex groove in a sliding mode.

In a further technical scheme, the front surface of the protractor body is provided with a limiting groove, the section shape of the limiting groove is in a shape of a Chinese character 'tu', the inner side of the wider part of the limiting groove is provided with a roller in a rolling manner, the inner side of the roller is rotatably connected with a limiting rod, the front end of the limiting rod penetrates through the limiting groove and is fixedly connected with a sliding block, and the sliding block is fixedly connected to one side of the movable rod.

In a further technical scheme, the front surface at sliding seat, extension rod, a movable block and No. two movable block tops all is equipped with the scale, the thickness of a movable block equals with protractor body thickness, the rear surface of No. two movable blocks and a movable block rear surface parallel and level.

The utility model has the advantages that:

1. compared with the prior art, through the sliding seat that sets up, extension rod and movable block No. one, the device of being convenient for can carry out the adjustment of a movable block and No. two movable block positions through two extension rods in the use to in carry out the adjustment of protractor measurement according to the figure, then rotate the sliding seat and drive the movable rod and rotate on the protractor body, thereby can be more convenient realize the angular surveying and the reading of different length variable sidelines, avoid destroying original figure.

2. Compared with the prior art, through the installation cover and the conical base that set up, the device of being convenient for fills in the inboard of installation cover with the chalk in the use, then can draw a circle as the centre of a circle with the conical base to the practicality of this protractor has been improved.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention;

fig. 2 is a schematic structural view of a protractor body according to an embodiment of the present invention;

FIG. 3 is a schematic sectional view of the movable seat according to the embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a movable block according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a section of the conical base according to an embodiment of the present invention.

Description of reference numerals:

1. a protractor body; 2. a movable seat; 3. an extension pole; 4. a first movable block; 5. a second movable block; 6. a movable rod; 7. a slider; 8. a limiting groove; 9. installing a sleeve; 10. a conical base; 11. installing a shaft; 12. a convex groove; 13. a limiting block; 14. a limiting rod; 15. and a roller.

Detailed Description

The embodiments of the present invention will be further explained with reference to the drawings.

Example (b):

as shown in fig. 1-5, a protractor convenient for reading, including protractor body 1, protractor body 1 front surface fixedly connected with installation axle 11, installation axle 11 is located the center of the circle of protractor body 1 front surface scale part, the outside of installation axle 11 is rotated through the bearing and is connected with sliding seat 2, convex groove 12 has all been seted up to one side of sliding seat 2 and protractor body 1, the front end of two convex groove 12 sliding connection has extension rod 3 respectively, one side fixedly connected with No. two movable blocks 5 of front end extension rod 3, one side fixedly connected with No. one movable block 4 of back arithmetic extension rod 3, opposite side fixedly connected with movable rod 6 of movable seat 2, all inlay the pointer on the horizontal central line of No. 4 movable block and No. two movable blocks 5 rear surfaces, the rear surface of movable rod 6 has seted up the opening that runs through the top of movable rod 6, the open-ended bottom inner wall and No. 5 upper zero scale line parallel and level on protractor body 1, sliding seat 2, extension rod 3, the front surface of No. 4 movable block and No. 5 movable block top all is equipped with the scale, no. 4 rear surface parallel and level of No. 5 thickness of No. 5 movable block equals.

The working principle of the technical scheme is as follows:

when the angle gauge needs to carry out angle measurement, at first pull out extension rod 3 from the movable seat 2 through No. two movable blocks 5, then pull out another extension rod 3 from the angle gauge body 1 through a movable block 4, laminate a movable block 4 with one of them line through the pointer, clockwise rotation movable seat 2 is laminated with another line parallel and level through the pointer on No. two movable blocks 5 afterwards, because the rotation of movable seat 2 can drive movable rod 6 to rotate, consequently, carry out the reading according to the laminating of opening bottom inner wall and scale on the movable rod 6, so as to reduce the measurement burden, realize the angle measurement and the reading of different length variable sidelines, and avoid destroying original figure, when the angle gauge does not carry out angle measurement, otherwise the operation makes movable seat 2 and a movable block 4 and No. two movable blocks 5 reset, realize accomodating of angle gauge body 1, avoid influencing the carrying of the teacher of wantonly, in addition, through movable seat 2, extension rod 3, scale on a movable block 4 and No. two movable blocks 5 is so as to carry out the measurement of straight line length.

In another embodiment, as shown in fig. 2, the front end of the mounting shaft 11 penetrates through the movable seat 2 and is screwed with a conical base 10, and the inner side of the front end of the second movable block 5 is fixedly connected with a mounting sleeve 9.

The conical base 10 is installed on the outer side of the front end of the installation shaft 11 in a threaded mode, the installation sleeve 9 is installed on the inner side of the front surface of the second movable block 5, chalk can be plugged into the installation sleeve 9, then the conical base 10 is used as the circle center for drawing circles, and therefore the practicability of the protractor body 1 is improved.

In another embodiment, as shown in fig. 3, a stopper 13 is fixedly connected to one end of the extension rod 3, and the stopper 13 is slidably connected to the inner side of the wider portion of the convex groove 12.

Through the sliding connection of the limiting block 13 and the wider part of the convex groove 12, the friction force between the extension rod 3 and the convex groove 12 can be increased, and the limiting effect can be achieved.

In another embodiment, as shown in fig. 1, a limiting groove 8 is formed in the front surface of the protractor body 1, the limiting groove 8 has a convex cross-sectional shape, a roller 15 is rotatably mounted inside a wider portion of the limiting groove 8, a limiting rod 14 is rotatably connected inside the roller 15, a front end of the limiting rod 14 penetrates through the limiting groove 8 and is fixedly connected with a sliding block 7, and the sliding block 7 is fixedly connected to one side of the movable rod 6.

Firstly, a limiting groove 8 is formed in the front surface of the protractor body 1, then the roller 15 is installed on the inner side of the roller 15 in a rolling manner, and the roller 15 is connected with the sliding block 7 at the front end of the protractor body 1 through the limiting rod 14, so that when the movable rod 6 rotates, stable sliding can be achieved through the limiting effect of the sliding block 7 and the limiting groove 8.

The above embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims

1. A protractor convenient for reading comprises a protractor body (1) and is characterized in that: protractor body (1) front surface fixedly connected with installation axle (11), installation axle (11) are located protractor body (1) front surface scale portion's the center of a circle, the outside of installation axle (11) is rotated through the bearing and is connected with sliding seat (2), convex groove (12), two have all been seted up to one side of sliding seat (2) and protractor body (1) the front end sliding connection respectively of convex groove (12) has extension rod (3), the front end one side fixedly connected with No. two movable blocks (5) of extension rod (3), the back is calculated one side fixedly connected with No. one movable block (4) of extension rod (3), opposite side fixedly connected with movable rod (6) of movable seat (2).

2. A protractor facilitating reading as claimed in claim 1, wherein: the front end of installation axle (11) runs through sliding seat (2) and threaded connection has tapered base (10), the inboard fixedly connected with installation cover (9) of front end of No. two movable blocks (5).

3. A protractor facilitating reading as claimed in claim 1, wherein: the pointer is inlaid on the horizontal center line of the rear surface of the first movable block (4) and the second movable block (5), an opening penetrating through the top end of the movable rod (6) is formed in the rear surface of the movable rod (6), and the bottom inner wall of the opening is parallel and level to the zero scale line on the protractor body (1).

4. A protractor facilitating reading as claimed in claim 1, wherein: one end fixedly connected with stopper (13) of extension rod (3), stopper (13) sliding connection is in the inboard of convex groove (12) broad portion.

5. A protractor facilitating reading as claimed in claim 1, wherein: spacing groove (8) have been seted up to protractor body (1) front surface, the section shape of spacing groove (8) is the type of protruding, gyro wheel (15) are installed in the inboard roll of spacing groove (8) broad part, the inboard rotation of gyro wheel (15) is connected with gag lever post (14), spacing groove (8) and fixedly connected with slider (7) are run through to the front end of gag lever post (14), slider (7) fixed connection is in one side of movable rod (6).

6. A protractor facilitating reading as claimed in claim 1, wherein: the front surface at sliding seat (2), extension rod (3), movable block (4) and No. two movable blocks (5) tops all is equipped with the scale, the thickness of movable block (4) equals with protractor body (1) thickness, the rear surface of No. two movable blocks (5) and a movable block (4) rear surface parallel and level.