Right-angle ring core protractor

Abstract

The utility model discloses a right-angle ring core protractor which comprises a fixed ruler body, a ring core is arranged at the axis of the fixed ruler body, the end portion of a rotating ruler body is movably connected with the ring core, the end portion of a horizontal ruler body is fixedly connected with the fixed ruler body, and the opposite ends of the horizontal ruler body and the rotating ruler body are respectively provided with a 45-degree oblique angle. The upper surface of the fixed ruler body is provided with a circular angle scale of 3-15 degrees, and the long sides of the horizontal ruler body and the rotary ruler body are provided with linear scales, so that an angle is drawn while measurement is carried out, the texture surface is in contact and friction with the fixed ruler body only by sliding the L-shaped sliding block, the rotation of the rotary ruler body is more stable and accurate, and the accuracy of measurement and drawing is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of right-angle ring core protractors, in particular to a right-angle ring core protractor. Background Art

[0002] When measuring angles in normal times, you usually need to use a semicircular protractor. When drawing angles, you can only use the protractor to measure the marks and then use a ruler to draw the angle.

[0003] Some protractors have a semicircular hole inside the triangle to form a triangle protractor. Both the semicircular protractor and the triangle protractor are relatively wide, and it is not convenient to put them in a pencil case, and they cannot draw angles while measuring. Therefore, a protractor or protractor is needed that can draw angles while measuring and can be folded for storage. Utility Model Content

[0004] The purpose of the utility model is to provide a right-angle ring core protractor to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a right-angle ring core protractor, comprising a fixed scale body, a ring core is arranged at the axis of the fixed scale body, the end of the rotating scale body is movably connected to the ring core, the end of the horizontal scale body is fixedly connected to the fixed scale body, the facing ends of the horizontal scale body and the rotating scale body each have an oblique angle of forty-five degrees, a circular 315-degree angle scale is arranged on the upper surface of the fixed scale body, and straight line scales are arranged on the long sides of the horizontal scale body and the rotating scale body.

[0006] Preferably, the fixed ruler body, the horizontal ruler body and the rotating ruler body have smooth surfaces and are made of the same material, and the horizontal ruler body and the rotating ruler body have a common point and the center of the ring.

[0007] Preferably, the angled end of the horizontal ruler body is provided with an I-shaped insert portion, and the fixed ruler body is provided with an insert groove portion, and the horizontal ruler body is embedded in the insert groove portion through the I-shaped insert portion, so that the horizontal ruler body is fixedly connected to the fixed ruler body.

[0008] Preferably, a portion of the outer edge of one side of the fixed ruler body is cut into a small round edge along the ruler body direction without affecting the rotation of the horizontal ruler body and the rotating ruler body.

[0009] Preferably, a slide groove is provided inside the rotating ruler body, an L-shaped sliding block is provided inside the slide groove, and a textured surface is provided on a side surface of the L-shaped sliding block close to the fixed ruler body.

[0010] Preferably, the inner wall of the slide groove is provided with friction teeth, and the outer surface of the L-shaped sliding block is provided with a guide groove matching the friction teeth.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. This right-angle ring core protractor is used in combination with a fixed ruler body, a horizontal ruler body and a rotating ruler body, so that the rotating ruler body can rotate and slide along the ring core, there is a 315-degree angle scale on the ring core, and there is a straight line scale on one side of the bottom surface of the long side of the fixed ruler body and the rotating ruler body, so that the angle can be drawn while measuring. The product has a simple structure, exquisite design, stable construction, high precision, strong versatility, convenient function realization, low manufacturing cost, and easy assembly and production.

[0013] 2. This right-angle ring-core protractor is used in combination with an L-shaped slider and a textured surface. When measuring and mapping, you only need to slide the L-shaped slider to make the textured surface contact the fixed ruler body. The friction makes the rotation of the rotating ruler body more stable and accurate, thereby increasing the accuracy of measurement and drawing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 A schematic diagram of the placement of the right-angle ring-core protractor provided by the utility model before measuring an angle;

[0016] Figure 3 A schematic diagram of the placement of the right-angle ring-core protractor provided by the utility model when measuring an angle;

[0017] Figure 4 It is a schematic diagram of the internal structure analysis of the utility model;

[0018] Figure 5 for Figure 4 A partial enlarged view of middle A;

[0019] Figure 6 It is a cross-sectional view of the chute of the utility model;

[0020] Figure 7 This is a cross-sectional view of the fixed scale body of the utility model.

[0021] In the figure: 1. Fixed scale body; 2. Ring core; 3. Horizontal scale body; 4. Rotating scale body; 6. L-shaped slider; 7. Friction teeth; 8. Slide groove; 9. Textured surface; 10. 315-degree angle scale. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Example 1

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, the right-angle ring core protractor of this embodiment includes a fixed scale body 1, a ring core 2 is integrally formed at the axis of the fixed scale body 1, the end of the rotating scale body 4 is movably connected to the ring core 2, the rotating scale body 4 can rotate along the ring core 2, the end of the horizontal scale body 3 is fixedly connected to the fixed scale body 1, and the facing ends of the horizontal scale body 3 and the rotating scale body 4 each have a 45-degree bevel, which facilitates the horizontal scale body 3 and the rotating scale body 4 to fit together after rotation. A circular 315-degree angle scale 10 is provided on the upper surface of the fixed scale body 1. Since the bevel of the horizontal scale body 3 blocks 45 degrees of the entire 360 ​​degrees of the ring core 2, only the 315-degree angle scale 10 is designed on the surface of the fixed scale body 1, and the bevel of the rotating scale body 4 will also occupy 45 degrees during the measurement process, so the entire scale body can only complete the angle measurement within the range of 270 degrees. See Figure 3As shown, by aligning the ring core 2 with the angle tip to be measured, the ring core 2 is made of transparent material, and one side of the horizontal scale body 3 is fitted with one side of the angle to be measured, and after the rotating scale body 4 is fitted with the horizontal scale body 3, the rotating scale body 3 is rotated so that the side just fitted with the horizontal scale body 3 is fitted with the other side of the angle to be measured, and the degree is read from the 315-degree angle scale 10 to complete the angle measurement. The long sides of the horizontal scale body 3 and the rotating scale body 4 are provided with linear scales, and the linear scales can measure the lengths of both sides of the angle to be measured.

[0027] Specifically, Figure 1 , Figure 4 and Figure 7 As shown, in order to achieve the fixation of the fixed scale body 1 and the horizontal scale body 3, an "I"-shaped insert is provided on the oblique side of the horizontal scale body 3, and the fixed scale body 1 is provided with an insert groove, and the horizontal scale body 3 is inserted into the insert groove through the "I"-shaped insert, so that the horizontal scale body 3 is fixedly connected to the fixed scale body (1). In order to make the rotating scale body 4 rotate along the ring core 2, a channel is provided on the oblique side of the rotating scale body 4, and the channel is sleeved on the fixed scale body 1, and the oblique tip of the rotating scale body 4 is connected to the center of the circle of the ring core 2 through a rotating shaft, so that the rotating scale body 4 rotates around the axis of the center of the circle of the ring core 2. Of course, the entire scale body is a transparent scale body.

[0028] Furthermore, the outer edge of one side of the fixed ruler body 1 is partially rounded off along the ruler body direction without affecting the rotation of the horizontal ruler body 3 and the rotating ruler body 4, so as to reduce the overall width of the right-angle ring core protractor.

[0029] The method of using the present embodiment is as follows: when the right-angle ring core protractor is used, the center of the fixed ruler body 1 is first aligned with the corner point of the angle to be measured, so that the horizontal ruler body 3 is aligned with one side of the angle to be measured, and then the rotating ruler body 4 is rotated to make the rotating ruler body 4 rotate and slide along the ring core 2. During the measurement process, the lines of the required angles can be drawn by the rotating ruler body 4, thereby achieving the goal of drawing angles while measuring. The product has a simple structure, sophisticated design, stable construction, high precision, strong versatility, convenient function realization, low manufacturing cost, and is easy to assemble and produce.

[0030] Example 2

[0031] The structure of the right-angle ring core protractor of this embodiment is basically the same as that of the right-angle ring core protractor of embodiment 1, and the difference is that: a slide groove 8 is provided inside the rotating scale body 4, and the height of the slide groove 8 is the thickness of the entire rotating scale body 4, and an L-shaped slider 6 is provided inside the slide groove 8. The L-shaped slider 6 is slidably connected to the rotating scale body 4 through the slide groove 8. The lower surface of the L-shaped slider 6 is provided with a textured surface 9, and the textured surface 9 has a certain friction coefficient, which can slow down the sliding speed of the rotating scale body 4 on the surface of the fixed scale body 1 (see Figures 4 to 6 ).

[0032] Furthermore, the inner wall of the slide groove 8 is provided with friction teeth 7, and the outer surface of the L-shaped slider 6 is provided with a guide groove matching the friction teeth 7. The guide groove cooperates with the friction teeth 7 so that the sliding direction of the L-shaped slider 6 is fixed.

[0033] The method of using this embodiment is as follows: when measuring and mapping, it is only necessary to slide the L-shaped slider 6 to make the textured surface 9 frictionally contact with the fixed ruler body 1. The friction force makes the rotation of the rotating ruler body 4 more stable and accurate, thereby increasing the accuracy of measurement and mapping.

[0034] Finally, it should be noted that the above are only preferred embodiments of the utility model and are not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A right-angle ring core protractor, characterized in that: The invention comprises a fixed ruler body (1), a horizontal ruler body (3) and a rotating ruler body (4); a ring core (2) is arranged at the axis of the fixed ruler body (1); the end of the rotating ruler body (4) is movably connected to the ring core (2); the end of the horizontal ruler body (3) is fixedly connected to the fixed ruler body (1); the facing ends of the horizontal ruler body (3) and the rotating ruler body (4) each have an oblique angle of 45 degrees; a circular 315-degree angle scale is arranged on the upper surface of the fixed ruler body (1); and straight line scales are arranged on the long sides of the horizontal ruler body (3) and the rotating ruler body (4).

2. The right-angle ring core protractor according to claim 1, characterized in that: The fixed ruler body (1), the horizontal ruler body (3) and the rotating ruler body (4) have smooth surfaces and are made of the same material, and the horizontal ruler body (3) and the rotating ruler body (4) have a common point and the center of the ring core (2).

3. The right-angle ring core protractor according to claim 1, characterized in that: The oblique angle end of the horizontal ruler body (3) is provided with an "I"-shaped insert block portion, and the fixed ruler body (1) is provided with an insert groove portion, and the horizontal ruler body (3) is embedded in the insert groove portion through the "I"-shaped insert block portion, so that the horizontal ruler body (3) is fixedly connected to the fixed ruler body (1).

4. The right-angle ring core protractor according to claim 1, characterized in that: The outer edge of one side of the fixed ruler (1) is cut into a small circular edge along the ruler direction without affecting the rotation of the horizontal ruler (3) and the rotating ruler (4).

5. The right-angle ring core protractor according to claim 1, characterized in that: A slide groove (8) is provided inside the rotating ruler body (4), an L-shaped slider (6) is provided inside the slide groove (8), and a textured surface (9) is provided on a side surface of the L-shaped slider (6) close to the fixed ruler body (1).

6. The right-angle ring-core protractor according to claim 5, characterized in that: The inner wall of the slide groove (8) is provided with friction teeth (7), and the outer surface of the L-shaped sliding block (6) is provided with a guide groove matching the friction teeth (7).

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