CN212673981U

CN212673981U - Accurate protractor

Info

Publication number: CN212673981U
Application number: CN202022130710.XU
Authority: CN
Inventors: 张丰宸
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-03-09
Anticipated expiration: 2030-09-25

Abstract

The utility model discloses an accurate protractor, including the protractor main part, be equipped with a plurality of angle groove in the protractor main part, seted up the trepanning in the protractor main part, the cover is equipped with fixed point mechanism in the trepanning, and fixed point mechanism includes sleeve axle, bottom plate, spring and presses the cap, and the bottom of pressing the cap is equipped with the contact pin, and the through-hole has been seted up at the middle part of bottom plate, and in the needle point of contact pin stretched into the through-hole, the epaxial cover of sleeve was equipped with the instruction chi, carved on the instruction chi and is equipped. This accurate protractor through the fixed point mechanism and the instruction chi that set up for press the cap according to on the fixed point mechanism and make according to the cap drive the contact pin and insert the crossing point department of measuring the angle line and overlap 0 line and an angle line in the protractor main part, through stirring the instruction chi and make the angle groove that the datum line on the instruction chi corresponds with another angle line overlap back datum line be accurate angle reading promptly, prevent to take place because of the problem of the unable accurate angle of measuring of the original point skew of protractor main part.

Description

Accurate protractor

Technical Field

The utility model relates to a drawing instrument technical field specifically is an accurate protractor.

Background

The protractor is a common drawing tool, can draw a required angle according to needs and can measure the drawn angle at the same time. The angle gauge is provided with an original point, the original point of the angle gauge and an intersection point of an angle line are coincided and then measured when the angle gauge is measured, and people can not align the original point of the angle gauge and the intersection point of the angle line sometimes in the process of pressing the angle gauge, so that the original point of the angle gauge is deviated, and the measured angle is deviated.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an accurate protractor to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

an accurate protractor comprises a protractor body, wherein a plurality of angle scribed lines are carved at the arc edge of the protractor body, a sleeve hole is formed in the circle center of the arc edge of the protractor body, a fixed point mechanism is sleeved in the sleeve hole and comprises a sleeve shaft, a bottom plate, a spring and a pressing cap, the sleeve shaft is inserted into the sleeve hole and is tightly bonded with the sleeve hole, the bottom plate is sleeved at the bottom end of the sleeve shaft and is tightly bonded with the sleeve shaft, the spring is sleeved inside the sleeve shaft, the pressing cap is in sliding connection with the sleeve shaft, a sliding cavity is formed in the sleeve shaft, a baffle in an annular structure is integrally formed at the top end of the sleeve shaft, the top end of the pressing cap extends out of the middle of the baffle, a hanging edge is integrally formed at the bottom end of the pressing cap, a contact pin is embedded at the bottom end of the hanging edge, a through hole is formed in the middle of the bottom plate, and the needle point, an indicating ruler is sleeved on the periphery of the sleeve shaft, and a datum line is carved on the indicating ruler.

Preferably, a sleeve groove used for installing the bottom plate is formed in the edge of the cavity opening at the bottom end of the sliding cavity, and the bottom surface of the protractor body, the bottom end of the bottom plate and the bottom end of the sleeve shaft are flush with each other.

Preferably, the outer diameter of the baffle, the outer diameter of the sleeve shaft, the outer diameter of the hanging edge, the inner diameter of the sliding cavity, the outer diameter of the pressing cap and the inner diameter of the baffle are sequentially reduced, a shaft hole is formed in the tail of the indicating ruler, and the size of the shaft hole is matched with the size of the outer diameter of the sleeve shaft.

Preferably, a top end of the spring abuts against a bottom end of the hanging edge, and a bottom end of the spring abuts against a top end of the bottom plate.

Preferably, the head position department integrated into one piece of instruction chi has the end, integrated into one piece has the protruding card that is the protrusion form on the inboard surface of end, the draw-in groove has been seted up on the circular arc side end face of protractor main part, the protruding card stretch into in the draw-in groove and with draw-in groove sliding connection, the homogeneous body shaping of first end both ends position department of protractor main part top straight line edge has the dog.

Preferably, a convex plate is integrally formed at the other position of the end head, the bottom surface of the convex plate is flush with the bottom surface of the protractor body, and a through taper hole-shaped drawing point hole is formed in the convex plate.

Compared with the prior art, the beneficial effects of the utility model are that:

this accurate protractor, through setting up fixed point mechanism and the instruction chi in the protractor main part for press the cap according to on the fixed point mechanism and make and press the cap and drive the contact pin and insert the crossing point department of measuring the angle line and overlap 0 line and an angle line in the protractor main part, through stirring the instruction chi and make the angle groove that datum line and another angle line on the instruction chi overlap the back datum line and correspond promptly for accurate angle reading, prevent because of the problem emergence of the unable accurate angle of measuring of the original point skew of protractor main part.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is another overall structure diagram of the present invention;

fig. 3 is a schematic structural view of the pointing mechanism of the present invention;

fig. 4 is a sectional view of the pointing device according to the present invention;

fig. 5 is a schematic structural view of the middle indicating ruler of the present invention.

The meaning of each reference number in the figures is:

1. a protractor body; 11. carrying out angle scribing; 12. trepanning; 13. a card slot; 14. a stopper; 2. a fixed point mechanism; 21. a sleeve shaft; 211. a sliding cavity; 212. a baffle plate; 213. sleeving a groove; 22. a base plate; 221. a through hole; 23. a spring; 24. pressing the cap; 241. hanging edges; 242. inserting a pin; 3. an indication ruler; 31. a reference line; 32. a shaft hole; 33. a tip; 331. a convex card; 332. a convex plate; 3321. and drawing a dot hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "a", "an", and "the" mean two or more unless explicitly limited otherwise.

Referring to fig. 1-5, the present invention provides a technical solution:

an accurate protractor comprises a protractor body 1, wherein a plurality of angle scribed lines 11 are scribed at the arc edge of the protractor body 1, wherein the angle scribed line 11 of 0 degree is a whole line segment, so that the angle scribed line 11 of 0 degree is overlapped and aligned with an angle line to be measured. The protractor body 1 is provided with a sleeve hole 12 at the center of a circle of an arc edge, a fixed point mechanism 2 is sleeved in the sleeve hole 12, the fixed point mechanism 2 comprises a sleeve shaft 21 inserted into the sleeve hole 12 and tightly bonded with the sleeve hole 12, a bottom plate 22 sleeved at the bottom end of the sleeve shaft 21 and tightly bonded with the sleeve shaft 21, a spring 23 sleeved inside the sleeve shaft 21 and a pressing cap 24 slidably connected with the sleeve shaft 21, a sliding cavity 211 is arranged in the sleeve shaft 21, a baffle plate 212 in an annular structure is integrally formed at the top end of the sleeve shaft 21, the top end of the pressing cap 24 extends out from the middle part of the baffle plate 212, a hanging edge 241 is integrally formed at the bottom end of the pressing cap 24, a contact pin 242 is embedded at the bottom end of the hanging edge 241, a through hole 221 is arranged at the middle part of the bottom plate 22, the needle tip of the contact pin 242 extends into the through hole 221, an indicating ruler 3 is sleeved at the periphery of the sleeve shaft 21, a reference line 31 is carved on the indicating ruler 3, the intersection point of the angle lines covered by the protractor main body 1 and the fixed point mechanism 2 can be directly observed from the upper side of the protractor main body 1, the pressing cap 24 can be pressed down after the needle point of the inserting needle 242 is aligned with the intersection point of the angle lines, the pressing cap 24 can drive the needle point of the inserting needle 242 to be inserted into the intersection point of the angle lines through the hanging edge 241, the intersection point of the original point of the protractor main body 1 and the intersection point of the angle lines can be overlapped and prevented from being deviated again, then the 0-degree angle marking line 11 is overlapped and aligned with one of the angle lines to be measured, the indicating ruler 3 is shifted to enable the indicating ruler 3 to rotate around the fixed point mechanism 2 until the reference line 31 slides into the other angle line to be aligned, the reading of the angle marking line 11 corresponding to the reference line.

In this embodiment, the bottom end opening edge of the sliding cavity 211 is provided with a sleeve groove 213 for installing the bottom plate 22, and the bottom surface of the protractor body 1, the bottom end of the bottom plate 22 and the bottom end of the sleeve shaft 21 are flush with each other, so that the protractor body 1 can be horizontally placed.

Specifically, the outer diameter of the baffle 212, the outer diameter of the sleeve shaft 21, the outer diameter of the hanging edge 241, the inner diameter of the sliding cavity 211, the outer diameter of the pressing cap 24 and the inner diameter of the baffle 212 are sequentially reduced, the shaft hole 32 is formed in the tail part of the indicating ruler 3, the pressing cap 24 and the hanging edge 241 are prevented from being separated from the sleeve shaft 21, meanwhile, under the elastic action of the spring 23, the needle point of the contact pin 242 is always located in the sliding cavity 211, and people are prevented from being scratched by the protruding needle point. The size of the shaft hole 32 is matched with the outer diameter of the sleeve shaft 21, so that the baffle 212 limits the indicating ruler 3 at the outer side of the sleeve shaft 21 and prevents the indicating ruler 3 from being separated.

Further, the top end of the spring 23 abuts against the bottom end of the hanging edge 241, the bottom end of the spring 23 abuts against the top end of the bottom plate 22, and the spring 23 is in a compressed state, so that when the pressing cap 24 is released, the spring 23 returns to the original position to lift the pressing cap 24 and the hanging edge 241 upwards, and the contact pin 242 retracts into the through hole 221.

In addition, the head part of the indication ruler 3 is integrally formed with a head 33, the inner side surface of the head 33 is integrally formed with a convex card 331, the arc side end face of the protractor body 1 is provided with a clamping groove 13, and the convex card 331 extends into the clamping groove 13 and is slidably connected with the clamping groove 13, so that the head part of the indication ruler 3 is always attached to the edge of the protractor body 1, and the head part of the indication ruler 3 is prevented from bending and tilting. The stopper 14 is integrally formed at the first end and the last end of the straight line edge at the top end of the protractor body 1, so that the end head 33 is prevented from being released from the end part of the clamping groove 13 when moving along the clamping groove 13.

It should be noted that the other part of the tip 33 is integrally formed with a convex plate 332, the bottom surface of the convex plate 332 is flush with the bottom surface of the protractor body 1, the convex plate 332 is provided with a through-taper-hole-shaped drawing hole 3321, after an angle line is drawn in advance, the contact pin 242 is inserted into the end of the angle line and the indicating ruler 3 is set at a desired angle, and then the tip of the contact pin 242 and the drawn point are connected by using a pen point to draw a point from the drawing hole 3321, so that the desired angle can be drawn.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides an accurate protractor, includes protractor main part (1), the circular arc edge of protractor main part (1) is carved with a plurality of angle ruling (11), its characterized in that: the protractor is characterized in that a sleeve hole (12) is formed in the circle center of an arc edge of the protractor body (1), a fixed point mechanism (2) is sleeved in the sleeve hole (12), the fixed point mechanism (2) comprises a sleeve shaft (21) which is inserted into the sleeve hole (12) and is tightly bonded with the sleeve hole (12), a bottom plate (22) which is sleeved at the bottom end of the sleeve shaft (21) and is tightly bonded with the sleeve shaft (21), a spring (23) which is sleeved inside the sleeve shaft (21) and a pressing cap (24) which is slidably connected with the sleeve shaft (21), a sliding cavity (211) is formed in the sleeve shaft (21), a baffle plate (212) which is of an annular structure is integrally formed at the top end of the sleeve shaft (21), the top end of the pressing cap (24) extends out of the middle of the baffle plate (212), a hanging edge (241) is integrally formed at the bottom end of the pressing cap (24), and a contact pin (242) is embedded in the bottom end of the hanging edge (241), the middle of the bottom plate (22) is provided with a through hole (221), the needle point of the contact pin (242) extends into the through hole (221), an indicating ruler (3) is sleeved at the periphery of the sleeve shaft (21), and a datum line (31) is carved on the indicating ruler (3).

2. The precision protractor of claim 1, wherein: the edge of the bottom end cavity opening of the sliding cavity (211) is provided with a sleeve groove (213) for installing the bottom plate (22), and the bottom surface of the protractor body (1), the bottom end of the bottom plate (22) and the bottom end of the sleeve shaft (21) are flush with each other.

3. The precision protractor of claim 1, wherein: the outer diameter of the baffle (212), the outer diameter of the sleeve shaft (21), the outer diameter of the hanging edge (241), the inner diameter of the sliding cavity (211), the outer diameter of the pressing cap (24) and the inner diameter of the baffle (212) are sequentially reduced, a shaft hole (32) is formed in the tail of the indicating ruler (3), and the size of the shaft hole (32) is matched with the outer diameter of the sleeve shaft (21).

4. The precision protractor of claim 1, wherein: the top end of the spring (23) is abutted against the bottom end of the hanging edge (241), and the bottom end of the spring (23) is abutted against the top end of the bottom plate (22).

5. The precision protractor of claim 1, wherein: head position department integrated into one piece of instruction chi (3) has end (33), integrated into one piece has convex protruding card (331) that is the form on the inboard surface of end (33), draw-in groove (13) have been seted up on the circular arc side end face of protractor main part (1), protruding card (331) stretch into in draw-in groove (13) and with draw-in groove (13) sliding connection, the homogeneous shaping of first end both ends position department of protractor main part (1) top straight line edge has dog (14).

6. The precision protractor of claim 5, wherein: the protractor is characterized in that a convex plate (332) is integrally formed at the other position of the end head (33), the bottom surface of the convex plate (332) is flush with the bottom surface of the protractor body (1), and a through taper hole-shaped drawing point hole (3321) is formed in the convex plate (332).