Foldable measuring scale for building construction

Abstract

The invention relates to the technical field of measuring rulers, and discloses a building construction foldable measuring ruler which comprises a shell, an opening formed in the shell, a reel arranged in the shell and a flexible ruler body arranged in the shell, one end of the flexible ruler body is wound on the reel, and the other end of the flexible ruler body penetrates out of the shell through the opening. The two sides of the flexible ruler body are provided with symmetrical bendable bending parts, the flexible ruler body is provided with symmetrical clamping grooves, the edges of the bending parts are clamped in the clamping grooves after the bending parts are bent, the opening is provided with a bending piece, the bending piece is provided with a bending hole, and the bending parts of the flexible ruler body penetrating through the bending hole are in a bending state. According to the foldable measuring ruler for building construction, the bending piece is arranged, after the flexible ruler body penetrates through the bending hole, the bending parts on the two sides of the edge of the flexible ruler body are bent and clamped in the clamping grooves, two hollow annular structures are formed in the edge of the flexible ruler body, and the annular structures are used for increasing the rigidity of the flexible ruler body; and the flexible ruler body is not easy to bend after being pulled out for a relatively long length.

Description

Technical Field

[0001] The invention relates to the technical field of measuring rulers, in particular to a foldable measuring ruler for construction. Background Art

[0002] A ruler is a tool used to measure length or distance, usually made of metal or flexible plastic, that can be retracted and rolled up to facilitate measuring longer distances.

[0003] A tape measure is disclosed in the patent publication number CN103245261A, which includes a housing, a drum wheel is arranged in the housing, the drum wheel is connected to the housing through a coil spring, a tape ruler is accommodated in the housing, one end of the tape ruler is connected to the coil spring and wound on the drum wheel, and the other end extends outward through a slit formed in the lower part of the housing and is connected to a ruler hook. The tape measure includes a locking device, which includes a locking rod and a stopper, and the locking rod and the stopper are connected by a connecting portion. The locking rod has an operating portion on the outer surface of the housing, and has fixing portions on both sides of the operating portion, the fixing portions fix the locking rod in the housing, and make the locking rod slide on the outer contour of the housing. The stopper includes a head located in the gap between the outer circumferential surface of the winding portion of the tape ruler around the drum wheel and the straight portion of the tape ruler guide slit, and the head maintains magnetic contact with the outer circumferential surface of the winding portion of the tape ruler around the drum wheel.

[0004] The prior art has the following defects: Existing tape measures can usually only be used to measure straight-line distances. In order to prevent the tape from bending easily, the cross-section of the tape is usually set to an arc surface to increase the rigidity of the tape. Although this method can increase the rigidity of the tape to a certain extent, the tape will bend when it is extended about 2 meters. Therefore, when measuring long distances, it is necessary to fix the hook at the free end of the tape and then release a sufficient length of the tape for measurement, which is very inconvenient to use. Summary of the invention

[0005] In view of the above problems in the prior art, a foldable measuring ruler for construction is proposed.

[0006] The present application provides a foldable measuring ruler for construction, the purpose of which is to provide a rigid and flexible measuring ruler, in which the ruler body is not easy to bend in the rigid mode and is used to measure the straight-line distance; in the flexible mode, the ruler body can be bent and is used to measure the length of the curve.

[0007] The technical solution of the present invention is: a foldable measuring ruler for construction, comprising a shell, an opening arranged on the shell, a reel arranged in the shell, and a flexible ruler body arranged in the shell, one end of the flexible ruler body is wound on the reel, and the other end is passed through the opening to the outside of the shell, the flexible ruler body has a winding force, symmetrical bendable bending parts are arranged on both sides of the flexible ruler body, symmetrical clamping grooves are arranged on the flexible ruler body, and the edges of the bending parts are clamped in the clamping grooves after being bent, a bending piece is arranged at the opening, and a bending hole is arranged on the bending piece, the bending part of the flexible ruler body in the shell is in an unfolded state, and the bending part of the flexible ruler body passing through the bending hole is in a bent state.

[0008] By adopting the above scheme, by setting a bending piece, after the flexible ruler passes through the bending hole, the curved parts on both sides of its edge are bent and snapped into the snapping groove, and the edge of the flexible ruler forms two hollow annular structures. The annular structure is used to increase the rigidity of the flexible ruler, so that the flexible ruler is not easy to bend even after being pulled out to a longer length.

[0009] Furthermore, an arc groove is provided in the engaging groove, and an arc protrusion is provided on the edge of the curved portion, and the arc protrusion and the arc groove match each other.

[0010] By adopting the above solution, the arc protrusion and the arc groove cooperate with each other, so that the edge of the bent portion is engaged in the engagement groove after being bent and is not easy to loosen.

[0011] Furthermore, it also includes a locking self-locking return mechanism arranged at the opening; The self-locking return mechanism includes a locking block arranged below the bending part, a W-shaped locking groove arranged in the locking block, an inverted V-shaped boss arranged in the locking groove, a W-shaped locking track between the boss and the locking groove, and also includes a spring sheet arranged at the opening, a flange arranged on the end surface of the bending part, the spring sheet and the flange abut against each other, an elastic rod is fixed at the bottom of the bending part, a locking column is connected to the end of the elastic rod, and the locking column slides in the locking track; After pressing the flange, the locking column is engaged in the middle of the locking track, and after pressing the flange again, the locking column slides out of the locking track.

[0012] By adopting the above scheme and setting a locking self-locking return mechanism, the measuring ruler has two working modes. In the rigid mode, the bending piece is fixed to the opening, and the flexible ruler body is pulled. After the flexible ruler body passes through the bending hole, the bending parts on both sides of the edge are bent and engaged in the engaging groove. The flexible ruler body is not easy to bend and is used to measure the straight-line distance. In the flexible mode, the folding piece is separated from the opening and relatively fixed to the free end of the flexible ruler body. The flexible ruler body can be bent and is used to measure the length of the curve.

[0013] Furthermore, a hook is provided at the free end of the flexible ruler, the hook and the flexible ruler are connected by a rivet, and an arc-shaped pit matching with the rivet top cap is provided in the bending hole.

[0014] By adopting the above scheme, the flexible ruler body and the bending part are relatively fixed by matching the rivet top cap with the arc-shaped pit.

[0015] Furthermore, a reel is provided in the shell, the flexible ruler body is rolled up in the reel, a slit is provided on the side wall of the reel, and one end of the flexible ruler body passes through the slit.

[0016] By adopting the above scheme, the flexible ruler body is rolled up in the reel, so that the flexible ruler body is rolled up densely and is not easy to shake in the shell.

[0017] Furthermore, a hook is provided on the side of the shell for hanging the measuring ruler on the body.

[0018] By adopting the above solution and providing a hook, the convenience of carrying the measuring ruler is increased.

[0019] Furthermore, a slidable sliding strip is provided on the housing, which contacts with the flexible ruler body to prevent the pulled-out flexible ruler body from retracting.

[0020] The above solution is adopted, by setting a sliding card strip, which is used to fix the flexible ruler and read the measured length.

[0021] Furthermore, the flexible ruler includes distance measurement marks printed on the surface of the flexible ruler.

[0022] The above scheme is adopted to measure the length by setting the distance measurement mark.

[0023] Beneficial effects of the present invention: 1. By setting the bending piece, after the flexible ruler passes through the bending hole, the curved parts on both sides of its edge are bent and snapped into the snap-fit ​​groove, and two hollow ring structures are formed on the edge of the flexible ruler. The ring structure is used to increase the rigidity of the flexible ruler, so that the flexible ruler is not easy to bend even after being pulled out to a longer length.

[0024] 2. By setting a self-locking return mechanism, the measuring ruler has two working modes. In the rigid mode, the bending piece is fixed to the opening, and the flexible ruler body is pulled. After the flexible ruler body passes through the bending hole, the bending parts on both sides of its edge are bent and engaged in the engaging groove. The flexible ruler body is not easy to bend and is used to measure the straight-line distance; in the flexible mode, the folding piece is separated from the opening and relatively fixed to the free end of the flexible ruler body. The flexible ruler body can be bent and is used to measure the length of the curve. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1A three-dimensional diagram of the foldable measuring ruler for building construction of the present invention; Figure 2 This is a schematic diagram of the internal structure of the foldable measuring ruler for construction of the present invention; Figure 3 A three-dimensional diagram of a bending part of the foldable measuring ruler for construction of the present invention; Figure 4 It is a stereoscopic view of the bending part of the foldable measuring ruler for construction of the present invention from other viewing angles; Figure 5 A bottom-view stereoscopic view of a curved part of the foldable measuring ruler for construction of the present invention; Figure 6 A top view of a locking block of the foldable measuring ruler for construction of the present invention; Figure 7 A cross-sectional view of a bent piece of the foldable measuring ruler for construction of the present invention; Figure 8 It is a cross-sectional view of the bending portion of the foldable measuring ruler for construction of the present invention in an unfolded state; Fig. 9 It is a cross-sectional view of the bending state of the bending portion of the foldable measuring ruler for construction of the present invention; Fig.10 This is a working state diagram of the foldable measuring ruler for construction of the present invention in a rigid mode; Fig.11 This is a working state diagram of the foldable measuring ruler for construction of the present invention in the flexible mode.

[0026] In the figure: 1. Shell; 2. Opening; 3. Reel; 4. Flexible ruler; 5. Bending part; 6. Engaging groove; 7. Bending piece; 8. Bending hole; 9. Circular arc groove; 10. Circular arc protrusion; 11. Locking block; 12. Locking groove; 13. Boss; 14. Locking track; 15. Spring piece; 16. Flange; 17. Elastic rod; 18. Locking column; 19. Hook; 20. Rivet; 21. Arc pit; 22. Reel; 23. Hook; 24. Sliding card strip. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] Example 1, reference Figure 1-11, is an embodiment of the present invention, providing a foldable measuring ruler for construction, comprising a shell 1, an opening 2 arranged on the shell 1, a reel 3 arranged in the shell 1, and a flexible ruler body 4 arranged in the shell 1, one end of the flexible ruler body 4 is wound on the reel 3, and the other end is passed through the opening 2 to pass out of the shell 1, the flexible ruler body 4 has a winding force, symmetrical bendable bending parts 5 are arranged on both sides of the flexible ruler body 4, symmetrical clamping grooves 6 are arranged on the flexible ruler body 4, and the edges of the bending parts 5 are clamped in the clamping grooves 6 after being bent, a bending piece 7 is arranged at the opening 2, and a bending hole 8 is arranged on the bending piece 7, the bending part 5 of the flexible ruler body 4 in the shell 1 is in an unfolded state, and the bending part 5 of the flexible ruler body 4 passing through the bending hole 8 is in a bent state.

[0029] Specifically, the opening of the bending hole 8 at one end inside the shell 1 fits the expanded state of the bending portion 5, and the opening of the bending hole 8 at one end outside the shell 1 fits the bent state of the bending portion 5. The hole wall of the bending hole 8 in the bending member 7 is smoothly connected by two openings through a lofted curved surface, so that the bending portion 5 passing through the bending hole 8 is gradually bent from the expanded state to the bent state. In this embodiment, the shape of the bending portion 5 after bending is a teardrop shape. It can be understood that in other embodiments, the shape of the bending portion 5 after bending may also be other shapes that are conducive to increasing the rigidity of the flexible ruler 4, such as a circle, an ellipse, a triangle, etc. Correspondingly, the shape of the bending hole 8 should also be adapted to the shape of the bending portion 5 after bending.

[0030] By providing the bending piece 7, after the flexible ruler 4 passes through the bending hole 8, the bending parts 5 on both sides of the edge are bent and snapped into the snapping groove 6, and two hollow annular structures are formed at the edge of the flexible ruler 4. The annular structure is used to increase the rigidity of the flexible ruler 4, so that the flexible ruler 4 is not easy to bend even after being pulled out to a longer length.

[0031] Reference Figure 8-Figure 9 A circular arc groove 9 is provided in the engaging groove 6, and a circular arc protrusion 10 is provided at the edge of the curved portion 5, and the circular arc protrusion 10 and the circular arc groove 9 match each other.

[0032] The arc protrusion 10 cooperates with the arc groove 9 so that the edge of the bent portion 5 is engaged with the inner edge of the engaging groove 6 after being bent and is not easy to be loosened.

[0033] Reference Figure 6-Figure 7, and also includes a self-locking return mechanism arranged at the opening 2; the self-locking return mechanism includes a locking block 11 arranged below the bending member 7, a W-shaped locking groove 12 arranged in the locking block 11, an inverted V-shaped boss 13 arranged in the locking groove 12, and a W-shaped locking track 14 between the boss 13 and the locking groove 12, and also includes a spring piece 15 arranged at the opening 2, and a flange 16 arranged on the end surface of the bending member 7, the spring piece 15 and the flange 16 are against each other, an elastic rod 17 is fixed at the bottom of the bending member 7, and a locking column 18 is connected to the end of the elastic rod 17, and the locking column 18 slides in the locking track 14; after pressing the flange 16, the locking column 18 is engaged in the middle of the locking track 14, and after pressing the flange 16 again, the locking column 18 slides out of the locking track 14.

[0034] Specifically, the self-locking return mechanism is used to switch between two working modes of the flexible ruler body 4. In the rigid mode, the locking column 18 is engaged at the midpoint of the W-shaped locking track 14. Figure 6 As shown, at this time, the bending member 7 is fixed at the opening 2, and the pulled-out flexible ruler body 4 has rigidity after being bent through the bending hole 8; the bending member 7 is pressed once, and the locking column 18 is disengaged from the locking track 14. At this time, the bending member 7 is disengaged from the opening 2, and the flexible ruler body 4 is pulled, and the bending member 7 is pulled out together with the end of the flexible ruler body 4. The pulled-out flexible ruler body 4 has not been bent through the bending hole 8 and has no rigidity, and can be bent for measurement; when the bending member 7 is restored to the opening 2, the bending member 7 is pressed again, and the locking column 18 is again engaged at the midpoint of the W-shaped locking track 14, and the flexible ruler body 4 returns to the rigid mode. The movement trajectory of the locking column 18 in the locking track 14 is shown in FIG. Figure 6 Shown by the dashed line.

[0035] By setting a self-locking return mechanism, the measuring ruler has two working modes. In the rigid mode, the bending piece is fixed to the opening 2, and the flexible ruler body 4 is pulled. After the flexible ruler body 4 passes through the bending hole 8, the bending parts 5 on both sides of the edge are bent and snapped into the snap groove 6. The flexible ruler body 4 is not easy to bend and is used to measure the straight-line distance; in the flexible mode, the folding piece is separated from the opening 2 and is relatively fixed to the free end of the flexible ruler body 4. The flexible ruler body 4 can be bent and is used to measure the length of the curve.

[0036] It can be understood that the cross-section of the flexible ruler body 4 is set to be straight, so that in the flexible mode, the flexible ruler body 4 has better bending performance and can measure irregular curved edges. The thickness of the bending part 5 is smaller than the thickness of the flexible ruler body 4, so that the bending part 5 has better bending performance.

[0037] Reference Figure 7 The free end of the flexible ruler 4 is provided with a hook 19, the hook 19 and the flexible ruler 4 are connected by a rivet 20, and an arc-shaped pit 21 matching with the top cap of the rivet 20 is provided in the bending hole 8.

[0038] The top cap of the rivet 20 cooperates with the arc-shaped pit 21 to fix the flexible ruler body 4 and the bending piece 7 relatively; the fixing flange 16 and pulling the hook can release the fixation of the flexible ruler body 4 and the bending piece 7.

[0039] Reference Figure 2 A reel 22 is provided in the housing 1, and the flexible ruler 4 is rolled up in the reel 22. A slit is provided on the side wall of the reel 22, and one end of the flexible ruler 4 passes through the slit.

[0040] By rolling up the flexible ruler 4 in the reel 22 , the flexible ruler 4 is rolled up densely and is not easy to shake in the housing 1 .

[0041] Reference Figure 1 A hook 23 is provided on the side of the housing 1 for hanging the measuring ruler on the body.

[0042] By providing the hook 23, the convenience of carrying the measuring ruler is increased.

[0043] Reference Figure 2 A slidable sliding strip 24 is provided on the housing 1, which contacts the flexible ruler body 4 to prevent the pulled-out flexible ruler body 4 from retracting.

[0044] The sliding card strip 24 is provided to fix the flexible ruler 4 and read the measured length.

[0045] The flexible ruler 4 includes distance measurement marks printed on the surface of the flexible ruler 4 .

[0046] Used to measure length by setting distance measurement marks.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A foldable measuring ruler for construction, comprising a housing (1), an opening (2) arranged on the housing (1), a reel (3) arranged in the housing (1), and a flexible ruler body (4) arranged in the housing (1), one end of the flexible ruler body (4) being wound on the reel (3), and the other end of the flexible ruler body (4) being passed through the opening (2) and out of the housing (1), the flexible ruler body (4) having a reeling force, characterized in that: Symmetrical bendable bending portions (5) are provided on both sides of the flexible ruler (4); symmetrical snap-fitting grooves (6) are provided on the flexible ruler (4); the edges of the bending portions (5) snap-fit ​​into the snap-fitting grooves (6) after being bent; a bending piece (7) is provided at the opening (2); a bending hole (8) is provided on the bending piece (7); the bending portion (5) of the flexible ruler (4) in the housing (1) is in an unfolded state; and the bending portion (5) of the flexible ruler (4) passing through the bending hole (8) is in a bent state.

2. The foldable measuring ruler for construction according to claim 1, characterized in that: The engaging groove (6) is provided with an arc groove (9), and the edge of the curved portion (5) is provided with an arc protrusion (10), and the arc protrusion (10) and the arc groove (9) are matched with each other.

3. The foldable measuring ruler for construction according to claim 1, characterized in that: It also includes a locking self-locking return mechanism arranged at the opening (2); The locking self-locking return mechanism comprises a locking block (11) arranged below the bending member (7), a W-shaped locking groove (12) arranged in the locking block (11), an inverted V-shaped boss (13) arranged in the locking groove (12), a W-shaped locking track (14) between the boss (13) and the locking groove (12), and also comprises a spring sheet (15) arranged at the opening (2), and a flange (16) arranged on the end surface of the bending member (7), the spring sheet (15) and the flange (16) abutting against each other, an elastic rod (17) being fixed at the bottom of the bending member (7), a locking column (18) being connected to the end of the elastic rod (17), and the locking column (18) sliding in the locking track (14); After the flange (16) is pressed, the locking column (18) is engaged in the middle of the locking track (14), and after the flange (16) is pressed again, the locking column (18) slides out of the locking track (14).

4. The foldable measuring ruler for construction according to claim 3, characterized in that: The free end of the flexible ruler (4) is provided with a hook (19), the hook (19) and the flexible ruler (4) are connected via a rivet (20), and an arc-shaped pit (21) matching with the top cap of the rivet (20) is provided in the bending hole (8).

5. The foldable measuring ruler for construction according to claim 1, characterized in that: A reel (22) is arranged inside the housing (1), and the flexible ruler (4) is rolled up inside the reel (22). A slit is arranged on the side wall of the reel (22), and one end of the flexible ruler (4) passes through the slit.

6. The foldable measuring ruler for construction according to claim 1, characterized in that: A hook (23) is provided on the side of the housing (1) for hanging the measuring ruler on the body.

7. The foldable measuring ruler for construction according to claim 1, characterized in that: The housing (1) is provided with a slidable sliding clip (24) which contacts the flexible ruler body (4) and is used to prevent the pulled-out flexible ruler body (4) from retracting.

8. The foldable measuring ruler for construction according to claim 1, characterized in that: The flexible ruler (4) comprises distance measurement marks which are printed on the surface of the flexible ruler (4).

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