Folding metal ruler

Abstract

The utility model provides a folding metal ruler contains a first metal ruler body, a first hinged axle and a second metal ruler body, the first metal ruler body contains a first scale surface and a first bottom surface and a first hinged ring of one end of first metal ruler body, the second metal ruler body contains a second scale surface and a second bottom surface and a second hinged ring of one end of second metal ruler body, first hinged ring and second hinged ring are connected to first hinged axle, make first metal ruler body and second metal ruler body can relatively rotate and form a folding state or an unfolding state, when unfolding state, first bottom surface and second bottom surface constitute a continuity plane.

Description

Technical Field

[0001] This utility model relates to a measuring metal ruler, and more particularly to a foldable metal ruler. Background Technology

[0002] In the field of engineering and technology, steel rulers are widely used in woodworking and metal processing, architectural surveying, and the measurement of general household items due to their high strength, low coefficient of thermal expansion, and precise graduations. Compared with plastic rulers, steel rulers are more durable, have a longer service life, and provide more accurate measurement results, making them popular among professionals. However, traditional steel rulers are usually straight and long, often one meter or more in length. This makes them inconvenient to carry when users need to go to the work site or in confined spaces, as their length and inflexibility make them difficult to bend.

[0003] To address the inconvenience of carrying steel rulers, conventional technology has proposed various rotary folding metal rulers. These rulers consist of multiple sections connected by hinges, allowing them to be folded and shortened in length. While this structure reduces the overall length of the metal ruler, rotary folding metal rulers still have the following drawbacks. Because the sections are connected by hinges, this mechanism causes localized increases in thickness, resulting in uneven height across the ruler surface. Consequently, when a user places the folding metal ruler on a work surface for measurement, this height difference prevents the ruler surface from fully adhering to the surface of the object being measured, leading to measurement errors. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned problems in the existing technology. The main objective of this application is to provide a new type of folding metal ruler that can provide high-precision measurement function with a steel ruler and offers convenient portability.

[0005] The objective of this utility model can be achieved through the following technical solution: This invention provides a folding metal ruler, comprising: a first metal ruler body, including a first scale surface and a first bottom surface, and a first hinge ring rolled from one end of the first metal ruler body; a first hinge shaft; and a second metal ruler body, including a second scale surface and a second bottom surface, and a second hinge ring rolled from one end of the second metal ruler body; wherein, both the first hinge ring and the second hinge ring are connected to the first hinge shaft, so that the first metal ruler body and the second metal ruler body can rotate relative to each other to form a folded state or an unfolded state; in the unfolded state, the first bottom surface and the second bottom surface form a continuous plane.

[0006] According to an embodiment of the present invention, a folding metal ruler, wherein, in the unfolded state, the first hinge and the second hinge protrude from the first scale surface and the second scale surface.

[0007] According to one embodiment of the present invention, a folding metal ruler is wherein the first hinge is formed by winding two tongue-shaped protrusions at one end of the first metal ruler body.

[0008] According to one embodiment of the present invention, a folding metal ruler is provided, wherein the second hinge is formed by winding a tongue-shaped protrusion at one end of the second metal ruler body.

[0009] According to an embodiment of the present invention, a folding metal ruler further includes a third metal ruler body and a second hinge axis, and the other end of the second metal ruler further includes a third hinge ring; wherein the third metal ruler body includes a third scale surface and a third bottom surface, and a fourth hinge ring formed by rolling one end of the third metal ruler body; the third hinge ring and the fourth hinge ring are hinged to each other through the second hinge axis, so that the second metal ruler body and the third metal ruler body can rotate relative to each other to form a folded state or an unfolded state.

[0010] According to an embodiment of the present invention, a folding metal ruler further includes a fourth metal ruler body and a third hinge axis, and the other end of the third metal ruler further includes a fifth hinge ring; wherein the fourth metal ruler body includes a fourth scale surface and a fourth bottom surface, and a sixth hinge ring formed by rolling one end of the fourth metal ruler body; the fifth hinge ring and the sixth hinge ring are hinged to each other through the third hinge axis, so that the third metal ruler body and the fourth metal ruler body can rotate relative to each other to form a folded state or an unfolded state.

[0011] According to an embodiment of the present invention, a folding metal ruler is provided, wherein the first hinge ring and the second hinge ring are engaged with each other, the third hinge ring and the fourth hinge ring are engaged with each other, and the fifth hinge ring and the sixth hinge ring are engaged with each other.

[0012] According to an embodiment of the present invention, a folding metal ruler is provided, wherein the first hinge shaft passes through the first hinge ring and the second hinge ring, the second hinge shaft passes through the third hinge ring and the fourth hinge ring, and the third hinge shaft passes through the fifth hinge ring and the sixth hinge ring.

[0013] According to one embodiment of the present invention, a folding metal ruler further includes a positioning plate hinged to a scale start position of the folding metal ruler, and the positioning plate can be horizontally folded onto the folding metal ruler.

[0014] According to one embodiment of the present invention, the folding metal ruler is made of aluminum, iron, stainless steel or a metal alloy. Attached Figure Description

[0015] Figure 1This is a front view of the folding metal ruler according to the first embodiment of this invention; Figure 2 This is a side view of the folding metal ruler according to the first embodiment of this invention; Figure 3 A schematic diagram of the folded state of the folding metal ruler according to the first embodiment of this invention; Figure 4A This is a schematic diagram of the first and second metal ruler bodies of the folding metal ruler according to the first embodiment before assembly. Figure 4B This is a partially enlarged schematic diagram of the first and second metal ruler bodies of the folding metal ruler in the first embodiment before processing; Figure 5 This is a schematic diagram of the back of the folding metal ruler according to the first embodiment of this invention; Figure 6 This is a front view of the folding metal ruler according to the second embodiment of this invention; Figure 7 This is a schematic diagram of a folding metal ruler positioned on the object to be measured, according to the second embodiment of this invention.

[0016] In the diagram: 100: Folding metal ruler; 110: First metal ruler body; 111: First scale surface; 112: First bottom surface; 113: First hinge; 113A: Tongue-shaped extension; 113B: Tongue-shaped extension; 120: Second metal ruler body; 121: Second scale surface; 122: Second bottom surface; 123: Second hinge; 123A: Tongue-shaped extension; 130: Hinge shaft; 200: Folding metal ruler; 210: First metal ruler body; 211: First scale surface. 13: First hinge 220: Second metal scale body 221: Second scale surface 223: Second hinge 224: Third hinge 230: Third metal scale body 231: Third scale surface 233: Fourth hinge 234: Fifth hinge 240: Fourth metal scale body 241: Fourth scale surface 243: Sixth hinge 251: First hinge axis 252: Second hinge axis 253: Third hinge axis 260: Positioning plate 300: Item to be measured Detailed Implementation

[0017] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0018] See Figure 1 and Figure 2 , Figure 1 This is a front view of the folding metal ruler according to the first embodiment of this invention; Figure 2 This is a side view of the folding metal ruler according to the first embodiment of this invention. Figure 1 and Figure 2As shown, the folding metal ruler 100 of the first embodiment includes a first metal ruler body 110, a second metal ruler body 120, and a hinge shaft 130. The first metal ruler body 110 and the second metal ruler body 120 of the folding metal ruler 100 can rotate along the hinge shaft 130, so that the folding metal ruler 100 has an unfolded state (e.g., Figure 1 ) or folded state (such as Figure 3 ); Figure 3 This is a schematic diagram of the folded state of the folding metal ruler according to the first embodiment of this invention.

[0019] See also Figure 4A and Figure 4B ,in, Figure 4A This is a schematic diagram of the first metal ruler body 110 and the second metal ruler body 120 of the folding metal ruler 100 in the first embodiment before assembly. Figure 4B This is a partially enlarged schematic diagram of the first metal ruler body 110 and the second metal ruler body 120 of the folding metal ruler 100 in the first embodiment before processing.

[0020] like Figure 4A As shown, the first metal ruler 110 is a rectangular metal sheet, including a first scale surface 111 and a first hinge 113 formed by rolling a short side 110A of the first metal ruler 110. In this embodiment, the first metal ruler 110 includes two first hinges 113. Figure 4B As shown, the short side 110A of the first metal ruler body 110 includes two tongue-shaped extensions 113A and 113B, with a gap between them. The first hinge 113 is formed by rolling the two tongue-shaped extensions 113A and 113B into a hollow tube shape in a direction facing the first scale surface 111, so that the first hinge 113 is formed on the first scale surface 111. Figure 2 As shown, the first metal body 110 further includes a first bottom surface 112.

[0021] The second metal ruler 120 is also a rectangular metal sheet, including a second scale surface 121 and a second hinge 123 formed by rolling a short side 120A of the second metal ruler 120. In this embodiment, the second metal ruler 120 includes a second hinge 123. Figure 4B As shown, the short side 120A of the second metal ruler body 120 includes a tongue-shaped extension 123A, and the second hinge 123 is formed on the second scale surface 121 by processing and rolling this tongue-shaped extension 123A into a hollow tube shape in the direction toward the second scale surface 121. Figure 2 As shown, the second metal body 120 further includes a second bottom surface 122.

[0022] like Figure 4BAs shown, before the first hinge ring 113 and the second hinge ring 123 are formed, the two tongue-shaped extensions 113A and 113B of the short side 110A of the first metal ruler 110 and the tongue-shaped extension 123A of the short side 120A of the second metal ruler 120 are interlocked in shape. That is, the tongue-shaped extension 123A of the short side 120A of the second metal ruler 120 can be interlocked between the two tongue-shaped extensions 113A and 113B of the short side 110A of the first metal ruler 110. Therefore, after processing, the first hinge ring 113 of the first metal ruler 110 and the second hinge ring 123 of the second metal ruler 120 can be interlocked to form a hinge joint for the passage of the hinge shaft 130 (a needle-like object in this embodiment). That is, the hinge shaft 130 passes through the first hinge ring 113 and the second hinge ring 123, thereby connecting the first metal ruler 110 and the second metal ruler 120 and causing the first metal ruler 110 and the second metal ruler 120 to rotate relative to each other. The material of the folding metal ruler 100 includes aluminum, iron, stainless steel, or metal alloy.

[0023] Although the hinge shaft 130 is a needle-like object in this embodiment, it can be any other structure with the same function in other embodiments, and this invention is not limited thereto. For example, the hinge shaft 130 can be a plate-like object with two hinge rings on the left and right sides, used to hinge the first hinge ring 113 and the second hinge ring 123, thereby connecting the first metal ruler 110 and the second metal ruler 120, and enabling the first metal ruler 110 and the second metal ruler 120 to rotate relative to each other.

[0024] See also Figure 1 The folding metal ruler 100 has a first metal body 110 and a second metal body 120 with continuous scales and a length measurement function. The first scale surface 111 of the first metal body 110 and the second scale surface 121 of the second metal body 120 are connected to each other. A first hinge 113 and a second hinge 123 are provided at the junction of the first metal body 110 and the second metal body 120, and are located on the first scale surface 111 and the second scale surface 121.

[0025] Please see Figure 5 This is a schematic diagram of the back of the folding metal ruler according to the first embodiment of this invention. Figure 5As shown, the back of the folding metal ruler 100 is a continuous flat surface (the first bottom surface 112 of the first metal ruler body 110 and the second bottom surface of the second metal ruler body 120, in the unfolded state, form a continuous plane). Therefore, during actual measurement, the folding metal ruler 100 of this invention can be placed flat on the surface of the object to be measured, such as a wooden board, avoiding the inconvenience caused by the uneven height of conventional folding rulers.

[0026] The folding metal ruler 100 of the first embodiment of this invention is a two-fold folding ruler. In practical applications, for example, a 60 cm ruler can be folded in half to become a 30 cm long folding ruler, thereby halving the length of the original ruler for easier carrying. However, the folding metal ruler 100 of this invention is not limited to a single-fold folding ruler, but also includes three-fold, four-fold, or more segmented folding ruler structures; furthermore, the length of the folding metal ruler 100 of this invention is not limited to this embodiment, but can be a ruler of any length, such as a ruler of 20 cm, 30 cm, 50 cm, or 100 cm in length, and this invention is not limited thereto.

[0027] Please see Figure 6 This is a front view of the folding metal ruler according to the second embodiment of this invention. The main difference between the folding metal ruler 200 of the second embodiment and the folding metal ruler 100 of the first embodiment is that the folding metal ruler 200 of the second embodiment is a four-fold folding ruler. The main manufacturing method of the folding metal ruler 200 of the second embodiment is the same as that of the folding metal ruler 100 of the first embodiment. Figure 6 As shown, the folding metal ruler 200 of the second embodiment of this invention includes a first metal ruler body 210, a second metal ruler body 220, a third metal ruler body 230, a fourth metal ruler body 240, and three hinge axes (first hinge axis 251, second hinge axis 252, and third hinge axis 253). The first metal ruler body 210 is connected to one end of the second metal ruler body 220 through the first hinge axis 251, the other end of the second metal ruler body 220 is connected to one end of the third metal ruler body 230 through the second hinge axis 252, and the other end of the third metal ruler body 230 is connected to the fourth metal ruler body 240 through the third hinge axis 253. The folding metal ruler 200 of the second embodiment of this invention further includes a positioning plate 260, which is hinged to the starting position of the scale of the folding metal ruler 200 and can be used to fix the folding metal ruler 200 onto the object to be measured. The material of the folding metal ruler 200 includes aluminum, iron, stainless steel, or metal alloy.

[0028] The first metal ruler body 210 of the folding metal ruler 200 is a rectangular metal sheet, and includes a first scale surface 211, a first bottom surface (not shown), and a first hinge ring 213 formed by rolling one end of the first metal ruler body 210. The first hinge ring 213 is formed on the first scale surface 211.

[0029] The second metal ruler body 220 of the folding metal ruler 200 is also a rectangular metal sheet, and includes a second scale surface 221, a second bottom surface (not shown), and a second hinge 223 and a third hinge 224 respectively rolled from the left and right ends of the second metal ruler body 220. The second hinge 223 and the third hinge 224 are formed on the second scale surface 221. The first hinge 213 can be fitted into the second hinge 223.

[0030] The third metal ruler body 230 of the folding metal ruler 200 is also a rectangular metal sheet, and includes a third scale surface 231, a third bottom surface (not shown), and a fourth hinge ring 233 and a fifth hinge ring 234 respectively rolled from the left and right ends of the third metal ruler body 230. The fourth hinge ring 233 and the fifth hinge ring 234 are formed on the third scale surface 231. The third hinge ring 224 can be fitted into the fourth hinge ring 233.

[0031] The fourth metal body 240 of the folding metal ruler 200 is also a rectangular metal sheet, including a fourth scale surface 241, a fourth bottom surface (not shown), and a sixth hinge ring 243 formed from one end of the fourth metal body 240. The sixth hinge ring 243 is formed on the fourth scale surface 241. The fifth hinge ring 234 can be fitted into the sixth hinge ring 243.

[0032] The first hinge axis 251 passes through the first hinge ring 213 and the second hinge ring 223; the second hinge axis 252 passes through the third hinge ring 224 and the fourth hinge ring 233; and the third hinge axis 253 passes through the fifth hinge ring 234 and the sixth hinge ring 243. Therefore, the first metal body 210, the second metal body 220, the third metal body 230 and the fourth metal body 240 of the folding metal ruler 200 can rotate relative to each other along the three hinge axes (the first hinge axis 251, the second hinge axis 252 and the third hinge axis 253), overlap each other, and give the folding metal ruler 200 an unfolded state and a folded state. Since the first hinge 213, the second hinge 223, the third hinge 224, the fourth hinge 233, the fifth hinge 234, and the sixth hinge 243 of the folding metal ruler 200 are all located on the first scale surface 211, the second scale surface 221, the third scale surface 231, and the fourth scale surface 241, respectively, the back surface of the folding metal ruler 200 is a continuous flat surface when unfolded.

[0033] To further explain, in this embodiment, the positioning plate 260 includes a hinge structure and is connected to the short side of the folded metal ruler 200 by a hinge, and is located at the starting point of the measurement scale of the folded metal ruler 200. Through the hinge structure, the hinge structure of the positioning plate 260 can rotate at different angles; in the unfolded state, the positioning plate 260 is parallel to the scale surfaces of the folded metal ruler 200 (first scale surface 211, second scale surface 221, third scale surface 231, and fourth scale surface 241), that is, the positioning plate 260 can be horizontally folded onto the folded metal ruler.

[0034] In the folded state, the positioning plate 260 is perpendicular to the short side of the folded metal ruler 200. The 90-degree angle between the positioning plate 260 and the folded metal ruler 200 allows the folded metal ruler 200 to be fixed to the item to be measured. See also... Figure 7 This is a schematic diagram illustrating the positioning of a folding metal ruler on the object to be measured, according to the second embodiment of this invention. Figure 7 As shown, in actual use, the positioning plate 260 of the folding metal ruler 200 can be opened, that is, the positioning plate 260 can be folded. At this time, the positioning plate 260 and the first metal ruler body 210 of the folding metal ruler 200 form an angle of approximately 90 degrees, and the folding metal ruler 200 can be pressed against and fixed on the item to be measured 300. In this way, during actual measurement, the folding metal ruler 200 of this invention can be placed flat on the surface of the item to be measured, such as on a wooden board, which avoids the inconvenience caused by the uneven height of conventional folding rulers.

[0035] The above description is merely illustrative of specific embodiments of the present invention and is not intended to limit the present invention. Equivalent substitutions, modifications, or alterations made by those skilled in the art based on the teachings of the present invention are all included within the scope of the patent application of the present invention and do not depart from the scope of the present invention. The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to substitute them, but without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0036] Although this article frequently uses terms such as 100: folding metal ruler; 110: first metal ruler body; 111: first scale surface; 112: first bottom surface; 113: first hinge; 113A: tongue-shaped extension; 113B: tongue-shaped extension; 120: second metal ruler body; 121: second scale surface; 122: second bottom surface; 123: second hinge; 123A: tongue-shaped extension; 130: hinge shaft; 200: folding metal ruler; 210: first metal ruler body; 211: first scale surface; 213 First hinge 220; Second metal scale body 221; Second scale surface 223; Second hinge 224; Third hinge 230; Third metal scale body 231; Third scale surface 233; Fourth hinge 234; Fifth hinge 240; Fourth metal scale body 241; Fourth scale surface 243; Sixth hinge 251; First hinge shaft 252; Second hinge shaft 253; Third hinge shaft 260; Positioning plate 300; Item to be measured. However, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would be contrary to the spirit of this utility model.

Claims

1. A folding metal ruler, comprising: a first metal ruler body including a first scale surface and a first bottom surface, and a first hinge ring rolled from one end of the first metal ruler body; a first hinge shaft; and a second metal ruler body including a second scale surface and a second bottom surface, and a second hinge ring rolled from one end of the second metal ruler body; wherein, Both the first hinge and the second hinge are connected to the first hinge shaft, allowing the first metal ruler and the second metal ruler to rotate relative to each other to form a folded state or an unfolded state; in the unfolded state, the first bottom surface and the second bottom surface form a continuous plane.

2. A folding metal ruler according to claim 1, characterized in that, In the unfolded state, the first hinge and the second hinge protrude from the first scale surface and the second scale surface.

3. A folding metal ruler according to claim 1, characterized in that, The first hinge is formed by winding two tongue-shaped protrusions at one end of the first metal ruler.

4. A folding metal ruler according to claim 1, characterized in that, The second hinge is formed by winding a tongue-shaped protrusion at one end of the second metal ruler.

5. A folding metal ruler according to claim 1, characterized in that, It further includes a third metal ruler body and a second hinge shaft, and the other end of the second metal ruler body includes a third hinge ring; wherein, the third metal ruler body includes a third scale surface and a third bottom surface, and a fourth hinge ring rolled from one end of the third metal ruler body; the third hinge ring and the fourth hinge ring are hinged to each other through the second hinge shaft, so that the second metal ruler body and the third metal ruler body can rotate relative to each other to form a folded state or an unfolded state.

6. A folding metal ruler according to claim 5, characterized in that, It further includes a fourth metal ruler body and a third hinge shaft, and the other end of the third metal ruler body includes a fifth hinge ring; wherein, the fourth metal ruler body includes a fourth scale surface and a fourth bottom surface, and a sixth hinge ring rolled from one end of the fourth metal ruler body; the fifth hinge ring and the sixth hinge ring are hinged to each other through the third hinge shaft, so that the third metal ruler body and the fourth metal ruler body can rotate relative to each other to form a folded state or an unfolded state.

7. A folding metal ruler according to claim 6, characterized in that, The first hinge ring engages with the second hinge ring, the third hinge ring engages with the fourth hinge ring, and the fifth hinge ring engages with the sixth hinge ring.

8. A folding metal ruler according to claim 6, characterized in that, The first hinge shaft passes through the first hinge ring and the second hinge ring, the second hinge shaft passes through the third hinge ring and the fourth hinge ring, and the third hinge shaft passes through the fifth hinge ring and the sixth hinge ring.

9. A folding metal ruler according to any one of claims 1, 5, or 6, characterized in that, It also includes a positioning plate that is hinged to a starting position of a scale on the folding metal ruler and can be folded horizontally onto the folding metal ruler.

10. A folding metal ruler according to any one of claims 1, 5, or 6, characterized in that, The folding metal ruler is made of materials including aluminum, iron, stainless steel, or metal alloys.

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