Triangular ruler

Abstract

The invention relates to the technical field of drawing tools, in particular to a triangular ruler. The invention provides a set square. The set square comprises a set square body and a backup plate which is rotatably arranged on the set square body, the backup plate comprises an upper backup plate, a lower backup plate and a bolt, and the set square body is arranged between the upper backup plate and the lower backup plate; one sides of the upper backup plate and the lower backup plate are fixed on the set square body through a rotating shaft, and the other sides of the upper backup plate and the lower backup plate can be locked; grooves distributed in the circumferential direction are formed in the triangular rule body, an elastic column is arranged on the upper backup plate, and a protrusion is arranged on the elastic column. When the backup plate rotates in the circumferential direction of the distribution of the grooves, the protrusions can be clamped into the different grooves. The technical problem that in the prior art, angle measurement and scribing are not accurate enough is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of drawing tools, in particular to a set square. Background Art

[0002] A set square is a rigid drawing instrument with a standardized scale. It's designed to assist users in constructing straight line segments and measure the length of target segments using the linear reference system provided by the scale. Current standard set squares have limited functionality and are difficult to meet field requirements.

[0003] The Chinese utility model patent with announcement number CN210116301U disclosed a foldable multifunctional triangle ruler on February 28, 2020, including a triangle ruler body and a ruler, the ruler being rotatably connected to the triangle ruler body, the triangle ruler and the ruler both having scale marks, and positioning grooves provided on the triangle ruler and the ruler, the positioning grooves being provided with a plurality of positioning points, the positioning points corresponding to the scale marks and being flush, the pen tip of the marking pen can be limited to the positioning points, and parallel lines can be drawn by translating the triangle ruler body. The slider and the straight rod of the patent are riveted, and are fixed at the corresponding angle by tightening the slider at the appropriate angle. However, this method can easily move the straight rod during the tightening process, causing its position to shift, resulting in insufficient accuracy. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide a set square, which aims to solve the technical problem of insufficient accuracy in the angle measurement and marking process in the prior art.

[0005] To achieve the above-mentioned objectives, the present invention proposes a set square, comprising a set square body and a support plate rotatably arranged on the set square body; the support plate comprises an upper support plate, a lower support plate and a bolt, and the set square body is arranged between the upper support plate and the lower support plate; one side of the upper support plate and the lower support plate are fixed to the set square body by a rotating shaft, and the other side of the two can be locked; circumferentially distributed grooves are provided on the set square body, and an elastic column is provided on the upper support plate, and a protrusion is provided on the elastic column; when the support plate rotates along the circumferential direction of the groove distribution, the protrusion can be stuck into different grooves.

[0006] Preferably, the elastic column includes a shell and an elastic body arranged in the shell; the protrusion is a sphere clamped on the shell, and the protrusion is connected to the elastic body and can compress the elastic body.

[0007] Preferably, an upper protrusion is provided on a side of the upper support plate close to the set square body, a lower protrusion is provided on a side of the lower support plate close to the set square body, and the elastic column is provided on the upper protrusion.

[0008] Preferably, the set square body is a right triangle, the rotating shaft is arranged on the center line of the set square body, and the rotating shaft is arranged on the side close to the right-angle vertex of the set square body.

[0009] Preferably, the upper and lower support plates are fixed at a side away from the rotating shaft by bolts, and the distance between the center line of the bolts and the center line of the rotating shaft is less than or equal to the length of the right-angled side of the set square body.

[0010] Preferably, the triangle ruler body is provided with a triangular hole, a circular hole and a rectangular hole.

[0011] Preferably, the triangle ruler body is provided with an arc groove, the arc groove is distributed along the arc direction formed by the groove, and angle scale lines are distributed along the arc groove on the triangle ruler body.

[0012] Compared with the prior art, the beneficial effects of the set square provided by the present invention are: 1. The triangle ruler body and the backing plate can be rotated, and can be positioned at different angles through the cooperation of the grooves and protrusions, thereby realizing positioning and marking at different angles.

[0013] 2. The elastic column cooperates with the protrusion to expand and contract, so that the back plate can be fixed in the groove position. Positioning does not require manual tightening, which is simple and more accurate.

[0014] The features and advantages of the present invention will be described in detail through embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 2 is a schematic structural diagram of a backing plate of a set square in an initial position according to an embodiment of the present invention.

[0016] Figure 2 2 is a schematic structural diagram of a set square after the back plate is rotated according to an embodiment of the present invention.

[0017] Figure 3 This is an embodiment of the present invention Figure 2 A schematic diagram of the structure from a side view.

[0018] Figure 4 2 is a schematic structural diagram of an elastic column according to an embodiment of the present invention.

[0019] in: 1-triangular ruler body; 11-groove; 12-triangular hole; 13-circular hole; 14-rectangular hole; 15-arc groove; 2-support plate; 21-upper support plate; 211-upper protrusion; 22-lower support plate; 221-lower protrusion; 3-elastic column; 31-protrusion; 32-housing; 33-elastic body; 4-bolt; 5-rotating shaft. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and examples. However, it should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the present invention.

[0021] In the description of the present invention, it should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element.

[0022] In the description of the present invention, it should be noted that the terms "center", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the inventive product is usually placed when in use. They 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 operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0023] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0024] Triangle rulers are generally used for marking in carpentry, but can also be used in the construction field or other fields for drawing.

[0025] See Figure 1An embodiment of the present invention provides a triangle ruler, comprising a triangle ruler body 1 and a support plate 2 rotatably arranged on the triangle ruler body 1. The support plate 2 comprises an upper support plate 21 and a lower support plate 22, and the triangle ruler body 1 is arranged between the upper support plate 21 and the lower support plate 22. The structures of the upper support plate 21 and the lower support plate 22 are generally the same and have a certain thickness. When used on a square wooden board, the side of the support plate 2 is placed against the side of the square wooden board, and the triangle ruler body 1 is tightly attached to the upper surface of the square wooden board. Length scale lines are provided on the right-angled sides and the hypotenuse of the triangle ruler body 1 to facilitate drawing straight lines. However, in the actual processing process, the wood is not square and may have anisotropy, so the support plate 2 is configured to be rotatable.

[0026] Furthermore, one side of the upper support plate 21 and the lower support plate 22 are fixed to the triangle ruler body 1 through the rotating shaft 5, and the other side of the two can be locked. Circumferentially distributed grooves 11 are provided on the triangle ruler body 1, and the upper support plate 21 is provided with an elastic column 3, and the elastic column 3 is provided with a protrusion 31; when the support plate 2 rotates along the circumferential direction of the grooves 11, the protrusion 31 can be stuck into different grooves 11. After the upper support plate 21 and the lower support plate 22 are clamped, the gap between the upper support plate 21 and the lower support plate 22 is kept constant, and during the rotation process, the protrusion 31 is stuck into different grooves 11 to form different angles. Scale lines are provided along the circumferential distribution direction of the grooves 11, so that the rotation angle can be clearly seen, which is convenient for better measurement.

[0027] For further information, see Figure 1 and Figure 2 The triangle ruler body 1 is a right triangle, the rotating shaft 5 is arranged on the center line of the triangle ruler body 1, and the rotating shaft 5 is arranged on the side close to the right angle vertex of the triangle ruler body 1. Figure 1 This is a structural diagram of the backrest in the initial position, that is, the backrest coincides with one of the right-angled sides. This is a common usage. Figure 2 Schematic diagram of the structure of the back plate after rotation, the angle change of the grooves varies according to the number of grooves 11. Generally, the more grooves there are, the smaller the angle change between adjacent grooves and the higher the precision.

[0028] Furthermore, the groove is in a spherical crown shape, and the grooves can be connected by arc grooves. The protrusion 31 is also arranged to have an arc surface, so that it is not easy to get stuck when moving.

[0029] For more details, see Figure 4The elastic column 3 includes a shell 32 and an elastic body 33 arranged in the shell; the protrusion 31 is a sphere stuck on the shell 32, and the protrusion 31 is connected to the elastic body 33 and can compress the elastic body 33. The shell 32 is detachably fixed to the back plate 2. The protrusion 31 is an iron ball, at least half of which is stuck in the shell 32. The protrusion 31 can roll freely on the shell 32 to reduce friction. The elastic body 33 can preferably be a spring, or other elastic objects can be selected, so that the protrusion 31 always tends to be pushed away from the shell 32. The shell 32 has space to accommodate the protrusion 31. When pushed by external force, the protrusion 31 can continue to retract into the shell 32.

[0030] For further information, see Figure 3 The upper support plate 21 is provided with an upper protrusion 211 on the side closest to the set square body 1, and a lower protrusion 221 on the side of the set square body 1. The elastic post 3 is disposed on the upper protrusion 211. This reduces the area of ​​the set square body 1 blocked by the support plate 2, thereby reducing the contact area. The lower support plate 22 is provided with an elastic post 3 on at least one of the two support plates 22, close to the upper support plate 21. Preferably, the elastic post 3 is provided on both sides of the support plate 2. In this case, corresponding grooves 11 are also provided on the lower support plate 22, thereby reducing wear during movement.

[0031] In an alternative embodiment, see Figure 1 and Figure 3 The upper support plate 21 and the lower support plate 22 are fixed on the side away from the rotating shaft 5 by bolts 4. The tightness of the upper support plate 21 and the lower support plate 22 is controlled by bolts 4, and they need to be adjusted to the optimal tightness before use. If it is too tight, the support plate will be too difficult to move and will be worn too much. If it is too loose, the support plate will be too easy to move and difficult to fix, which will affect the surveying and mapping accuracy. Furthermore, the distance between the center line of the bolt 4 and the center line of the rotating shaft 5 is less than or equal to the length of the right angle side of the set square body 1, and preferably the distance is equal. In this way, the rotation angle of the support plate is controlled to be 0-90 degrees, and will not rotate 360 ​​degrees.

[0032] In an optional embodiment, in order to further meet the actual needs, the triangle ruler is set to be multifunctional, see Figure 1 The set ruler body 1 is provided with a triangular hole 12, a circular hole 13, and a rectangular hole 14. These holes can be used for marking or hanging on a wall for storage. The set ruler body 1 is provided with an arc groove 15, which is arranged along the arc formed by the groove 11. Angle scale lines are distributed along the arc groove 15. Lines can be marked using the arc groove, and angles can be observed at the intersection of the back plate and the arc groove 15, meeting the user's different needs.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A set square, comprising a set square body (1) and a support plate (2) rotatably arranged on the set square body (1); characterized in that: The support plate (2) comprises an upper support plate (21) and a lower support plate (22), and the triangle ruler body (1) is arranged between the upper support plate (21) and the lower support plate (22); one side of the upper support plate (21) and the lower support plate (22) are fixed to the triangle ruler body (1) through a rotating shaft (5), and the other side of the two sides can be locked; circumferentially distributed grooves (11) are provided on the triangle ruler body (1), and an elastic column (3) is provided on the upper support plate (21), and a protrusion (31) is provided on the elastic column (3); when the support plate (2) rotates in the circumferential direction along the grooves (11), the protrusion (31) can be stuck into different grooves (11).

2. A set square as claimed in claim 1, characterized in that: The elastic column (3) comprises a shell (32) and an elastic body (33) disposed in the shell; the protrusion (31) is a sphere clamped on the shell (32); the protrusion (31) is connected to the elastic body (33) and is capable of compressing the elastic body (33).

3. A set square as claimed in claim 2, characterized in that: An upper protrusion (211) is provided on a side of the upper support plate (21) close to the triangle ruler body (1), a lower protrusion (221) is provided on a side of the lower support plate (22) close to the triangle ruler body (1), and the elastic column (3) is provided on the upper protrusion (211).

4. A set square as claimed in claim 1, characterized in that: The triangle ruler body (1) is a right-angled triangle, the rotating shaft (5) is arranged on the center line of the triangle ruler body (1), and the rotating shaft (5) is arranged on a side close to the right-angle vertex of the triangle ruler body (1).

5. A set square as claimed in claim 4, characterized in that: The upper support plate (21) and the lower support plate (22) are fixed on the side away from the rotating shaft (5) by bolts (4), and the distance between the center line of the bolts (4) and the center line of the rotating shaft (5) is less than or equal to the length of the right angle side of the triangle ruler body (1).

6. A set square as claimed in claim 1, characterized in that: The triangle ruler body (1) is provided with a triangular hole (12), a circular hole (13) and a rectangular hole (14).

7. A set square as claimed in claim 1, characterized in that: The triangle ruler body (1) is provided with an arc groove (15), the arc groove (15) is distributed along the arc direction formed by the groove (11), and angle scale lines are distributed along the arc groove (15) on the triangle ruler body (1).

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