Novel foldable triangular rule
By designing a foldable set square, the problems of large storage space and limited measurement angles of set squares are solved, enabling multi-angle measurement and portability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JINHUA LINGTONG MEASURING TOOLS CO LTD
- Filing Date
- 2025-03-05
- Publication Date
- 2026-05-19
AI Technical Summary
Existing set squares take up a lot of space when stored and have a single measurement angle, making them unsuitable for measuring non-right-angle dimensions.
A novel foldable triangle ruler has been designed. It rotates around a pivot using long and short ruler pieces, with the rotation angle limited by a limiting part. When fully unfolded, it is vertical, and when fully folded, it occupies little space. The included angle can be read through the marked points and the angle scale lines on the arc groove, and the knob can be tightened to fix it for measurement at any angle.
It enables the set square to measure multiple angles without taking up too much space, adapts to non-right-angle size measurement, and is easy to carry.
Smart Images
Figure CN224256336U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a set square, and more particularly to a novel foldable set square. Background Technology
[0002] A set square is a common measuring tool. A standard set square typically only measures length and specific angles. To enhance its functionality, some set squares also include angle graduations. In the machinery and construction industries, a specialized L-shaped set square (also known as a corner ruler) has been developed. Its structure primarily consists of two perpendicular rulers, typically one longer than the other. One of its main uses is to check the perpendicularity of the edges of a single object or the perpendicularity between objects, offering significantly higher efficiency than a standard set square. However, due to its structural limitations, the corner ruler takes up more space when stored. If the two rulers could rotate and fold together, its space requirement would be significantly reduced, making it easier to carry. Furthermore, existing corner rulers have fixed angles, making them unsuitable for measuring non-right-angle dimensions, thus limiting their functionality. Summary of the Invention
[0003] This invention provides a new type of foldable set square, which solves the problems of existing set squares occupying relatively little storage space and having a single measurement angle.
[0004] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: A novel foldable triangle ruler, comprising: a long ruler piece and a rectangular short ruler piece, wherein the long ruler piece is provided with a first outer long side and a first inner long side, and the short ruler piece is provided with an upper short side, a lower short side, a second outer long side, and a second inner long side; the first outer long side is provided with length scale lines, and the lower short side and the second outer long side are also provided with length scale lines; one end of the long ruler piece is provided with a shaft hole, and the other end is provided with a secondary pad; a main pad is protruding on the back of the short ruler piece; the bottom surface of the secondary pad is flush with the bottom surface of the main pad; and the side of the main pad forms a first limiting part and a second limiting part. The short ruler has two limiting parts. A rotating shaft is located on the lower short side of the back of the short ruler. The shaft hole on the long ruler is rotatably mounted on the rotating shaft. When the long ruler rotates to abut against the first limiting part, the first outer long side is flush with the lower short side, and the two rulers are perpendicular to each other. When the long ruler rotates to abut against the second limiting part, the first outer long side is flush with the second inner long side, and the two rulers are parallel to each other. The short ruler also has an arc-shaped groove concentric with the rotating shaft. The arc of the groove is 90°, and its edge has angle scale lines. The long ruler has markings that can be observed from within the arc-shaped groove.
[0005] In this invention, the long and short rulers can rotate relative to each other around a pivot. Their rotation angle is limited by a first and second limiting part. When fully extended, the long and short rulers are perpendicular to each other; when fully folded, they occupy little space and are easy to store. Furthermore, this invention allows for the real-time reading of the included angle between the long and short rulers by observing the angle scale lines on the arc-shaped groove at the marked point, thus enabling its use in angle measurement.
[0006] Furthermore, the rotating shaft includes a limiting cap, a rotating shaft section, a fixed section, a threaded section, and a through hole. The limiting cap abuts against the bottom surface of the long ruler piece. The shaft hole is rotatably mounted on the rotating shaft section. The fixed section has a polygonal outline. The short ruler piece has a mounting hole that matches the shape of the fixed section. A countersunk hole is also provided on the bottom side of the mounting hole. The threaded section is located on the upper side of the short ruler piece and is screwed onto a knob. An elastic washer fitted on the threaded section is provided between the knob and the short ruler piece. The knob has a through hole communicating with the through hole, through which the vertex of the measuring angle can be determined. Through the above technical solution, when the knob is tightened, the distance between the knob and the limiting cap tends to decrease, thus the friction between the long and short ruler pieces increases sharply, causing them to be relatively fixed. In this way, the present invention can fix the long and short ruler pieces within any angle range, facilitating the fixing of the measuring angle.
[0007] Furthermore, the long ruler is also provided with several equally spaced circular holes, with a spacing of 5mm or 10mm and a diameter of 2 to 3mm. The second outer long side and the second inner long side of this invention can both be used to fit against a flat surface, and then translated along the flat surface. By inserting a pen tip into the circular holes, a line parallel to the flat surface can be drawn.
[0008] Therefore, this utility model has the following characteristics compared with the prior art: 1. The long and short rulers in this utility model can rotate relative to each other around the rotating shaft, and their rotation angle is limited by setting the first and second limiting parts. When fully unfolded, the long and short rulers are perpendicular to each other. When fully folded, the overall space occupied is small and easy to store; 2. At the same time, this utility model can read the real-time included angle of the long and short rulers by observing the angle scale line on the arc groove of the marked point, so that this utility model can be used to measure angles; 3. By tightening the knob, the long and short rulers can be fixed within any angle range, which is convenient for this utility model to fix the included angle measurement. Attached Figure Description
[0009] Appendix Figure 1 This is a schematic diagram of the bottom structure of this utility model when fully unfolded;
[0010] Appendix Figure 2 It is attached Figure 1A schematic diagram of the front structure;
[0011] Appendix Figure 3 It is attached Figure 2 Sectional view along axis AA;
[0012] Appendix Figure 4 It is attached Figure 3 Enlarged view of part B;
[0013] Appendix Figure 5 This is a top view of the rotating shaft.
[0014] Appendix Figure 6 This is a schematic diagram of the bottom structure of the present invention when fully folded. Detailed Implementation
[0015] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.
[0016] In the description of this utility model, it should 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", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0017] Example 1: See Figure 1 , Figure 2 and Figure 6A novel foldable set square includes: a long stainless steel ruler 10 and a rectangular stainless steel short ruler 20. The long ruler has a first outer long side 11 and a first inner long side 12, and the short ruler has an upper short side 21, a lower short side 22, a second outer long side 23, and a second inner long side 24. Length graduations are provided on both the front and back of the first outer and first inner long sides, as are length graduations on the lower short side and the second outer long side. One end of the long ruler has a shaft hole 13, and the other end has a secondary pad 14. A main pad 25 protrudes from the back of the short ruler. The bottom surface of the secondary pad is flush with the bottom surface of the main pad, and the side of the main pad forms... The device has a first limiting part 26 and a second limiting part 27. A rotating shaft 30 is also provided on the lower short side of the back of the short ruler. The shaft hole on the long ruler is rotatably assembled on the rotating shaft. When the long ruler rotates to abut against the first limiting part, the first outer long side is flush with the lower short side, and the two rulers are perpendicular to each other. When the long ruler rotates to abut against the second limiting part, the first outer long side is flush with the second inner long side, and the two rulers are parallel to each other. The short ruler is also provided with an arc-shaped groove 28 concentric with the rotating shaft. The arc of the arc-shaped groove is 90°, and its edge is provided with angle scale lines. The long ruler is provided with a marking point 15 that can be observed from inside the arc-shaped groove.
[0018] In this embodiment, the long and short rulers can rotate relative to each other around the pivot. Their rotation angle is limited by a first and a second limiting part. When fully extended, the long and short rulers are perpendicular to each other; when fully folded, they occupy little space and are easy to store. Furthermore, this embodiment allows for the real-time reading of the included angle between the long and short rulers by observing the angle scale lines on the arc-shaped groove, thus enabling angle measurement.
[0019] See Figure 3 , Figure 4 and Figure 5 The rotating shaft includes a limiting cap 31, a rotating shaft section 32, a fixed section 33, a threaded section 34, and a through hole 35. The limiting cap abuts against the bottom surface of the long ruler piece. The shaft hole is rotatably mounted on the rotating shaft section. The fixed section has a regular hexagonal outline. The short ruler piece has a mounting hole 29 that matches the shape of the fixed section. A countersunk hole 291 is also provided on the bottom side of the mounting hole. The threaded section is located on the upper side of the short ruler piece and is screwed with a knob 36. An elastic washer 37 is provided between the knob and the short ruler piece and is fitted on the threaded section. The knob has a through hole 38 that communicates with the through hole. Through the above technical solution, when the knob is tightened, the distance between the knob and the limiting cap will tend to decrease. Therefore, the friction between the long and short ruler pieces will increase sharply, causing them to be relatively fixed. In this way, this embodiment can fix the long and short ruler pieces within any angle range, which is convenient for fixing the included angle in this embodiment.
[0020] See Figure 2The long ruler also has several equally spaced circular holes 16, with a spacing of 5 mm and a diameter of 2 mm. In this embodiment, both the second outer long side and the second inner long side can be used to fit against the flat surface, and then translated along the flat surface. By inserting the pen tip into the circular hole, a line parallel to the flat surface can be drawn.
[0021] This invention can be modified in many ways, as will be apparent to those skilled in the art, and such modifications are not considered to depart from the scope of this invention. All such modifications that are obvious to those skilled in the art are included within the scope of these claims.
Claims
1. A new and improved foldable triangular ruler characterized in that, include: The system comprises a long ruler and a rectangular short ruler. The long ruler has a first outer long side and a first inner long side. The short ruler has an upper short side, a lower short side, a second outer long side, and a second inner long side. The first outer long side has length graduation lines, and the lower short side and the second outer long side also have length graduation lines. One end of the long ruler has a shaft hole, and the other end has a secondary pad. The back of the short ruler has a protruding main pad. The bottom surface of the secondary pad is flush with the bottom surface of the main pad. The side of the main pad has a first limiting part and a second limiting part. The back of the short ruler also has a [missing information - likely a design element]. The rotating shaft body has the shaft hole on the long ruler piece rotatably mounted on it. When the long ruler piece rotates to abut against the first limiting part, the first outer long side is flush with the lower short side, and the two ruler pieces are perpendicular to each other. When the long ruler piece rotates to abut against the second limiting part, the first outer long side is flush with the second inner long side, and the two ruler pieces are parallel to each other. The short ruler piece is also provided with an arc-shaped groove concentric with the rotating shaft body. The arc of the arc-shaped groove is 90°, and its edge is provided with angle scale lines. The long ruler piece is provided with marking points that can be observed from inside the arc-shaped groove.
2. The new and improved folding triangle of claim 1, wherein: The rotating shaft includes a limiting cap, a rotating shaft section, a fixed section, a threaded section, and a through hole. The limiting cap abuts against the bottom surface of the long ruler piece. The shaft hole is rotatably mounted on the rotating shaft section. The fixed section has a polygonal outline. The short ruler piece has a mounting hole that matches the shape of the fixed section. The mounting hole also has a countersunk hole on the bottom side. The threaded section is located on the upper side of the short ruler piece and is screwed onto a knob. An elastic washer fitted on the threaded section is provided between the knob and the short ruler piece. The knob has a through hole communicating with the through hole.
3. The new and improved folding triangle of claim 1 or 2, wherein: The long ruler is also provided with several equally spaced circular holes, with a spacing of 5mm or 10mm and a diameter of 2 to 3mm.