A multifunctional digital angle gauge

Abstract

The present invention discloses a multifunctional digital display angle gauge, which comprises an upper ruler blank, a lower ruler blank, an anti-dropping component and a clamping component. The upper ruler blank is rotatably connected to the lower ruler blank. A gasket is arranged between the upper ruler blank and the lower ruler blank. A pin column is arranged below the gasket, and the pin column is riveted on the lower ruler blank. In the present invention, through the clamping component, when the knob is twisted, while the knob descends along the lower housing, the brake pad below is pressed downwards, and the brake pad presses the upper ruler blank downwards, so that the upper ruler blank and the lower ruler blank increase the friction force under the action of the gasket, thereby preventing the angle gauge from rotating easily during the measurement process and affecting the measurement accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring instruments, and particularly relates to a multifunctional digital angle gauge. Background Art

[0002] Digital angle gauges are widely used in multiple fields such as mechanical manufacturing, automotive repair, construction engineering, and woodworking. In mechanical manufacturing, it can be used for angle measurement and precise machining; in construction engineering, it can be used for angle measurement and wiring of buildings; in woodworking, it can be used for angle measurement and precise cutting. In addition, digital angle gauges are also widely used in various manufacturing industries, such as the production and processing processes of the automotive, aircraft, and electronics industries.

[0003] Digital angle gauges usually use button batteries of specific specifications as their power source. The battery structure is generally as shown in a digital woodworking angle gauge disclosed in "CN216432739U". By placing a 3V battery into the battery installation slot of the upper seat and then tightening the battery cover, the positive and negative poles on the PCB board are connected. However, during the actual installation or disassembly process, the friction generated by the battery holder fixing the battery when fixing the battery easily causes the battery to be damaged or even leak. In addition, when disassembling or installing the battery, the positive or negative contact piece needs to be unplugged to put the battery in, which is not convenient for operation. Accordingly, the present application proposes a multifunctional digital angle gauge. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies existing in the prior art and propose a multifunctional digital angle gauge.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A multifunctional digital angle gauge includes an upper ruler blank, a lower ruler blank, an anti-drop component, and a clamping component;

[0007] The upper ruler blank is rotatably connected to the lower ruler blank. A gasket is provided between the upper ruler blank and the lower ruler blank, and a pin is provided below the gasket. The pin is riveted to the lower ruler blank;

[0008] The anti-drop component is used to prevent the screw from falling off. The anti-drop component consists of a battery holder, a screw holder, and a screw. The screw is slidably connected in the battery holder, and the screw is threadedly connected to the screw holder. The battery holder is provided with a slot hole. The battery holder is provided with an installation component and a stabilizing component. The installation component is used to avoid scratching when installing the button battery, and the stabilizing component is used to make the installation of the battery by the battery holder more stable;

[0009] The clamping assembly is used to clamp the upper and lower ruler blanks. The clamping assembly consists of a knob, a brake pad, and a lower housing. The lower housing is disposed on the upper ruler blank. The brake pad is snap-fitted inside the lower housing. The knob is threadedly connected to the outside of the lower housing.

[0010] Preferably, a fixed grating base is fixedly connected above the pin column by screws. A spring washer is disposed outside the fixed grating base. An electronic display assembly is disposed above the fixed grating base. The electronic display assembly is used to display the included angle between the upper and lower ruler blanks. The lower part of the pin column is hexagonal. A convex block is provided at the connection between the battery holder and the screw. The knob is disposed on the brake pad. The brake pad is disposed above the upper ruler blank.

[0011] Preferably, the electronic display assembly includes a PCB board, a tactile button, an EVA cushion block, a conductive adhesive, and a liquid crystal. The tactile button is fixedly installed above the PCB board. An EVA cushion block is fixedly connected to one side of the tactile button. The EVA cushion block is adhesively connected to the conductive adhesive. The conductive adhesive is adhesively connected to the liquid crystal.

[0012] Preferably, the installation assembly includes a first rubber wheel, two first wheel frames, a second rubber wheel, and two second wheel frames. The two first wheel frames are fixedly connected below the battery holder. The first rubber wheel is rotatably connected to the first wheel frames. The two second wheel frames are fixedly connected below the battery holder. The second rubber wheel is rotatably connected between the two second wheel frames.

[0013] Preferably, the stabilizing assembly includes a rod hook, a first helical gear, and a second helical gear. The first helical gear is rotatably connected inside the battery holder. The rod hook is fixedly connected to the center of the first helical gear. The second helical gear is rotatably connected to the first wheel frame.

[0014] Preferably, a positive contact piece is welded on the PCB board. A negative contact piece is welded on the PCB board on one side of the positive contact piece. A button battery is provided on the positive and negative contact pieces. The button battery is attached to the arc surfaces of the first rubber wheel and the second rubber wheel. A limiting assembly is provided on one side of the button battery. The limiting assembly is used to limit the positive contact piece when disassembling or installing the button battery. An upper housing is installed outside the PCB board above the liquid crystal. A glass sheet is adhesively connected above the upper housing.

[0015] Preferably, the first helical gear is rotatably connected in a slot hole. The first helical gear is meshed with the second helical gear. A rotating shaft is fixedly connected to the center of the second helical gear. One end of the rotating shaft away from the second helical gear is fixedly connected to the first rubber wheel.

[0016] Preferably, the limiting component includes a hook, a limiting block, a spring block and a first spring. The hook is fixedly connected to the positive contact piece, the limiting block is fixedly connected to the hook, the first spring is fixedly connected to the PCB board, and one end of the first spring away from the PCB board is fixedly connected to the spring block.

[0017] Preferably, a spring seat is provided outside the first spring and fixedly connected to the PCB board. A pressing block is fixedly connected to the outside of the spring block. A second spring is fixedly connected to the lower part of the pressing block. One end of the second spring away from the pressing block is fixedly connected to the PCB board. The pressing block and the spring block are slidably connected to the spring seat.

[0018] Preferably, scale tables are provided on the surfaces of the upper ruler blank and the lower ruler blank. Screw holes are provided on the lower cover shell, the PCB board and the upper cover shell, and the three groups of screw holes are corresponding in the up-and-down positions.

[0019] The present invention has the following beneficial effects:

[0020] Through the anti-dropping component, when the screw is turned to loosen and leave the screw seat, the battery holder and the battery can be normally taken out. The convex block inside the battery holder will limit the two ends of the screw, so that after the battery holder is taken out, the screw will not fall out or be taken out from the inside of the battery holder, or be taken out and swallowed by children, endangering life safety.

[0021] Through the clamping component, when the knob is turned, while the knob descends along the lower cover shell, the brake pad below is pressed down. The brake pad presses the upper ruler blank downwards, so that the upper ruler blank and the lower ruler blank increase the friction force under the action of the gasket, so that the angle ruler will not easily rotate during the use and measurement process, thus affecting the measurement accuracy.

[0022] The pin column is pressed into the lower ruler blank by a riveting machine. Since the bottom end of the pin column is hexagonal, after the pin column is pressed into the lower ruler blank, the hexagonal bottom end of the pin column is stuck inside the lower ruler blank, so that the pin column can be more stably stuck in the lower ruler blank, and further the overall installation is more firm.

[0023] Through the installation component, when installing the button battery, after the button battery is placed on the negative contact piece, the screw of the battery holder is loosened to make the battery holder rotate. When the first rubber wheel contacts the button battery, the button battery is pressed down and rolls above the button battery at the same time, so as to avoid directly generating friction on the button battery by the battery holder, resulting in battery damage or even leakage.

[0024] Through the limiting component, when it is necessary to disassemble or install the button battery, the positive contact piece is toggled to one side, the hook on the positive contact piece presses the spring block, and finally the limiting block on the hook is clamped on the spring block to limit the positive contact piece, facilitating the placement or removal of the button battery on the negative contact piece and avoiding manually limiting the positive contact piece all the time.

[0025] Through the stabilizing component, during the rotation of the battery holder, the first rubber wheel drives the second helical gear to rotate the first helical gear, so that the rod hook rotates continuously. When it rotates to the spring block, the battery holder just closes the button battery. By pressing the pressing block, the spring block releases the limit on the positive contact piece, and then releasing the pressing block makes the spring block rebound upward under the action of the first spring, and the hook on the rod hook is stuck and limited, so that the battery holder is not easy to shake and the installation of the button battery is more stable. Description of the Drawings

[0026] Figure 1 Schematic diagram of the overall structure of a multifunctional digital display angle gauge proposed by the present invention;

[0027] Figure 2 Exploded view of the connection structure of a multifunctional digital display angle gauge proposed by the present invention;

[0028] Figure 3 Schematic diagram of the connection structure of the components on the PCB board of a multifunctional digital display angle gauge proposed by the present invention;

[0029] Figure 4 Schematic diagram of the connection structure of the spring seat, positive contact piece and limiting component of a multifunctional digital display angle gauge proposed by the present invention;

[0030] Figure 5 Schematic diagram of the connection structure of the battery holder, installation component and stabilizing component of a multifunctional digital display angle gauge proposed by the present invention;

[0031] Figure 6 For Figure 5 Enlarged schematic diagram at position A in

[0032] Figure 7 For Figure 6 Enlarged schematic diagram at position B in

[0033] Figure 8 Schematic diagram of the connection structure of the installation component, battery holder, slot hole and other components of a multifunctional digital display angle gauge proposed by the present invention;

[0034] Figure 9 Schematic diagram of the connection structure of the first helical gear, second helical gear, rotating shaft and first rubber wheel of a multifunctional digital display angle gauge proposed by the present invention;

[0035] Figure 10Schematic diagram of the connection structure of components such as the positive contact piece, negative contact piece, and PCB board of a multifunctional digital display angle gauge proposed by the present invention;

[0036] Figure 11 Schematic diagram of the connection structure of components such as the pressing block, rod hook, and second spring of a multifunctional digital display angle gauge proposed by the present invention;

[0037] Figure 12 Cross-sectional view of the internal components of the knob of a multifunctional digital display angle gauge proposed by the present invention;

[0038] Figure 13 Schematic diagram of the connection structure of components such as the knob, pin, and brake pad of a multifunctional digital display angle gauge proposed by the present invention;

[0039] Figure 14 Schematic diagram of the connection structure of the upper ruler blank, lower ruler blank, and pin of a multifunctional digital display angle gauge proposed by the present invention and cross-sectional view of the lower cover, knob, and brake pad;

[0040] Figure 15 Internal cross-sectional view of the battery holder and screw holder of a multifunctional digital display angle gauge proposed by the present invention.

[0041] In the figure: 1 upper ruler blank, 2 lower ruler blank, 3 scale table, 4 glass sheet, 5 upper cover, 6 liquid crystal, 7 knob, 8 conductive adhesive, 9 EVA cushion block, 10 battery holder, 11 touch button, 12 button battery, 13 PCB board, 14 lower cover, 15 fixed grating seat, 16 spring washer, 17 brake pad, 18 gasket, 19 pin, 20 positive contact piece, 21 hook, 22 slot hole, 23 first wheel bracket, 24 second helical gear, 25 rotating shaft, 26 first rubber wheel, 27 second rubber wheel, 28 second wheel bracket, 29 first helical gear, 30 limit block, 31 spring block, 32 spring seat, 33 first spring, 34 negative contact piece, 35 pressing block, 36 rod hook, 37 second spring, 38 screw holder, 39 screw, 40 screw hole. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Embodiment 1

[0043] Refer to Figures 1 - 15 , a multifunctional digital display angle gauge, including an upper ruler blank 1, a lower ruler blank 2, an anti-detachment component, and a clamping component;

[0044] The upper scale blank 1 is rotationally connected to the lower scale blank 2. A gasket 18 is provided between the upper scale blank 1 and the lower scale blank 2. Scale tables are provided on the surfaces of both the upper scale blank 1 and the lower scale blank 2. Screw holes 40 are provided on the lower housing 14, the PCB board 13, and the upper housing 5. The three groups of screw holes 40 correspond to each other in the vertical position. A pin 19 is provided below the gasket 18. The pin 19 is riveted to the lower scale blank 2. The lower part of the pin 19 is hexagonal. A fixed grating seat 15 is fixedly connected to the upper part of the pin 19 by screws. A spring washer 16 is provided outside the fixed grating seat 15. An electronic display component is provided above the fixed grating seat 15. The electronic display component is used to display the included angle between the upper scale blank 1 and the lower scale blank 2.

[0045] The anti-detachment component consists of a battery holder 10, a screw seat 38, and a screw 39. The screw 39 is slidably connected inside the battery holder 10. The screw 39 is threadedly connected to the screw seat 38. A convex block is provided at the connection between the battery holder 10 and the screw 39, which can limit the screw 39. A slot hole 22 is provided on the battery holder 10. An installation component and a stabilizing component are provided on the battery holder 10. The installation component is used to avoid scraping when installing the button battery 12. The stabilizing component is used to make the installation of the battery by the battery holder 10 more stable.

[0046] The clamping component consists of a knob 7, a brake pad 17, and a lower housing 14. The lower housing 14 is provided on the upper scale blank 1. The brake pad 17 is snap-fitted inside the lower housing 14. The knob 7 is threadedly connected to the outside of the lower housing 14. The knob 7 is provided on the brake pad 17. When the knob 7 descends, it can press the brake pad 17 downward. The brake pad 17 is provided above the upper scale blank 1. When the brake pad 17 descends, it can press the upper scale blank 1 downward to clamp tightly.

[0047] In this embodiment, the pin 19 is pressed into the lower ruler blank 2 by a riveting machine, and at the same time, the brake pad 17 and the lower housing 14 are assembled and installed on the upper ruler blank 1 using screws. Then, the upper ruler blank 1 assembly is assembled with the lower ruler blank 2 with the outer circle of the pin 19. A gasket 18 is sandwiched between the upper ruler blank 1 and the lower ruler blank 2. Then, the fixed grid base 15 is installed on the end face of the pin 19 using screws, and after placing the spring washer 16, it is connected to the lower housing 14 through the internal and external threads of the knob 7. Since the bottom end of the pin 19 is hexagonal, after the pin 19 is pressed into the lower ruler blank 2, the hexagonal bottom end of the pin 19 is stuck inside the lower ruler blank 2, so that the pin 19 can be more stably clamped in the lower ruler blank 2, and thus the overall installation is more firm. Subsequently, screws are screwed into the screw holes 40, and the PCB board 13 and the upper housing 5 are installed on the lower housing 14. When it is necessary to clamp the upper ruler blank 1 and the lower ruler blank 2, through the clamping assembly, the knob 7 is twisted. While the knob 7 descends along the lower housing 14, the lower brake pad 17 is pressed downwards. The brake pad 17 presses the upper ruler blank 1 downwards, increasing the friction force between the upper ruler blank 1 and the lower ruler blank 2 under the action of the gasket 18, so that the angle ruler will not rotate easily during the use and measurement process, thus affecting the measurement accuracy. In addition, it is worth mentioning that when the screw 39 is turned to make the screw 39 leave the screw seat 38, the battery holder 10 and the button battery 12 can be taken out normally. The convex block inside the battery holder 10 will limit the two ends of the screw 39, so that after the battery holder 10 is taken out, the screw 39 will not fall out or be taken out from the inside of the battery holder 10, or be taken out and swallowed by children, endangering life safety. Embodiment 2

[0048] Further, different from Embodiment 1, referring to Figure 2 and Figures 5 - 8 , the specific structures of the electronic display component and the installation component are as follows:

[0049] The electronic display component includes a PCB board 13, a touch button 11, an EVA spacer 9, a conductive adhesive 8, and a liquid crystal 6. The touch button 11 is fixedly installed above the PCB board 13. One side of the touch button 11 is fixedly connected to the EVA spacer 9. The EVA spacer 9 is glued to the conductive adhesive 8. The conductive adhesive 8 is glued to the liquid crystal 6. Above the liquid crystal 6, an upper housing 5 is installed outside the PCB board 13. A glass sheet 4 is glued above the upper housing 5.

[0050] The installation component includes a first rubber wheel 26, two first wheel frames 23, a second rubber wheel 27, and two second wheel frames 28. The two first wheel frames 23 are fixedly connected below the battery holder 10. The first rubber wheel 26 is rotatably connected to the first wheel frame 23. The first rubber wheel 26 and the second rubber wheel 27 have the same diameter. The arc surfaces of the first rubber wheel 26 and the second rubber wheel 27 are in contact with the button battery 12, so that the button battery 12 can be clamped with the negative contact piece 34. The two second wheel frames 28 are fixedly connected below the battery holder 10. The second rubber wheel 27 is rotatably connected between the two second wheel frames 28.

[0051] In the embodiment, when the electronic display component is used, a voltage signal is generated by the displacement of the moving grating PCB board 13 installed on the ruler blank and the fixed grating bars on the fixed grating. After being processed by the MCU data, a digital signal is generated and then transmitted to the liquid crystal 6 through the conductive adhesive 8 to display the measurement data, which is convenient for the user to view in time. When the installation component is used, when installing the button battery 12, after placing the button battery 12 on the negative contact piece 34, loosen the screw 39 of the battery holder 10 to make the battery holder 10 rotate. When the first rubber wheel 26 contacts the button battery 12, press down the button battery 12 and roll above the button battery 12 at the same time, so as to avoid directly generating friction on the button battery 12 by the battery holder, resulting in battery damage or even leakage. Embodiment Three

[0052] Furthermore, different from Embodiment One and Embodiment Two, referring to Figures 3 - 5 and Figures 9 - 11 , the specific structures of the stabilizing component and the limiting component are as follows:

[0053] The stabilizing component includes a rod hook 36, a first helical gear 29, and a second helical gear 24. The first helical gear 29 is rotatably connected inside the battery holder 10. The rod hook 36 is fixedly connected to the center of the first helical gear 29. The second helical gear 24 is rotatably connected to the first wheel frame 23. There is a slot hole 22 on the battery holder 10. The first helical gear 29 is rotatably connected in the slot hole 22, so that the rod hook 36 and the first helical gear 29 can reduce the space occupation. The first helical gear 29 is meshed and connected with the second helical gear 24. Thus, when the second helical gear 24 rotates, it can drive the first helical gear 29 to rotate. A rotating shaft 25 is fixedly connected to the center of the second helical gear 24. One end of the rotating shaft 25 away from the second helical gear 24 is fixedly connected to the first rubber wheel 26. Thus, when the first rubber wheel 26 rotates, it can drive the second helical gear 24 to rotate through the rotating shaft 25.

[0054] The limiting component includes a hook 21, a limiting block 30, a spring block 31 and a first spring 33. The hook 21 is fixedly connected to the positive contact piece 20. The limiting block 30 is fixedly connected to the hook 21. The first spring 33 is fixedly connected to the PCB board 13. One end of the first spring 33 away from the PCB board 13 is fixedly connected to the spring block 31. A spring seat 32 is fixedly connected to the PCB board 13 outside the first spring 33. A pressing block 35 is fixedly connected to the outside of the spring block 31. A second spring 37 is fixedly connected to the lower part of the pressing block 35. One end of the second spring 37 away from the pressing block 35 is fixedly connected to the PCB board 13. The pressing block 35 and the spring block 31 are slidably connected to the spring seat 32.

[0055] In this embodiment, through the stabilizing component, during the rotation of the battery holder 10, the first rubber wheel 26 drives the second helical gear 24 to rotate the first helical gear 29, so that the rod hook 36 rotates continuously. When it rotates to the spring block 31, the battery holder 10 just closes the button battery 12. By pressing the pressing block 35, the spring block 31 releases the limit on the positive contact piece 20. Then, when the pressing block 35 is released, the spring block 31 rebounds upward under the action of the first spring 33, and the hook on the rod hook 36 is caught and limited, so that the battery holder 10 is not easy to shake, and the installation of the button battery 12 is more stable. When the button battery needs to be disassembled or installed, through the limiting component, the positive contact piece 20 is toggled to one side, the hook 21 on the positive contact piece 20 presses the spring block 31, and finally the limiting block 30 on the hook 21 is clamped on the spring block 31 to limit the positive contact piece 20, which is convenient for placing or taking out the button battery 12 on the negative contact piece 34, and avoids manually limiting the positive contact piece 20 all the time.

[0056] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A multifunctional digital angle ruler, characterized in that: It comprises an upper scale blank (1), a lower scale blank (2), an anti-falling component and a clamping component; The upper ruler blank (1) is rotatably connected to the lower ruler blank (2); a gasket (18) is provided between the upper ruler blank (1) and the lower ruler blank (2); a pin (19) is provided below the gasket (18); and the pin (19) is riveted to the lower ruler blank (2); The anti-falling component is used to prevent the screw from falling off. The anti-falling component is composed of a battery seat (10), a screw seat (38), and a screw (39). The battery seat (10) is slidably connected with a screw (39), and the screw (39) is threadedly connected with the screw seat (38). The battery seat (10) is provided with a slot (22). The battery seat (10) is provided with a mounting component and a stabilizing component. The mounting component is used to prevent scratches when installing a button battery (12). The mounting component includes a first rubber wheel (26), two first wheel frames (23), a second rubber wheel (27), and two second wheel frames (28). The two first wheel frames (23) are fixedly connected to the bottom of the battery seat (10), the first rubber wheel (26) is rotatably connected to the first wheel frame (23), the two second wheel frames (28) are fixedly connected to the bottom of the battery seat (10), and the second rubber wheel (27) is rotatably connected between the two second wheel frames (28); The stabilizing component is used to make the battery holder (10) more stable for mounting the battery; the stabilizing component comprises a rod hook (36), a first bevel gear (29) and a second bevel gear (24); the first bevel gear (29) is rotatably connected in the battery holder (10); the rod hook (36) is fixedly connected to the center of the first bevel gear (29); and the second bevel gear (24) is rotatably connected to the first wheel frame (23); The clamping assembly is used to clamp an upper ruler blank (1) and a lower ruler blank (2), and the clamping assembly consists of a knob (7), a brake pad (17) and a lower cover shell (14); the lower cover shell (14) is arranged on the upper ruler blank (1), the brake pad (17) is clamped in the lower cover shell (14), and the knob (7) is threadedly connected to the outer side of the lower cover shell (14).

2. A multifunctional digital angle ruler according to claim 1, characterized in that: A fixed grid seat (15) is fixedly connected to the top of the pin (19) by means of screws, a spring washer (16) is provided on the outside of the fixed grid seat (15), an electronic display assembly is provided on the top of the fixed grid seat (15), and the electronic display assembly is used to display the angle between the upper scale blank (1) and the lower scale blank (2), the bottom of the pin (19) is hexagonal, a bump is provided at the connection between the battery seat (10) and the screw (39), the knob (7) is provided on the brake pad (17), and the brake pad (17) is provided on the top of the upper scale blank (1).

3. A multifunctional digital angle ruler according to claim 2, characterized in that: The electronic display assembly comprises a PCB board (13), a light touch button (11), an EVA pad (9), a conductive adhesive (8), and a liquid crystal (6); the light touch button (11) is fixedly mounted on the top of the PCB board (13); one side of the light touch button (11) is fixedly connected to the EVA pad (9); the EVA pad (9) is glued to the conductive adhesive (8); and the conductive adhesive (8) is glued to the liquid crystal (6).

4. A multifunctional digital angle ruler according to claim 3, characterized in that: A positive contact sheet (20) is welded on the PCB board (13); a negative contact sheet (34) is provided on one side of the positive contact sheet (20) and is welded to the PCB board (13); button batteries (12) are provided on the positive contact sheet (20) and the negative contact sheet (34); the button batteries (12) are attached to the arc surfaces of the first rubber wheel (26) and the second rubber wheel (27); a limiter assembly is provided on one side of the button battery (12); the limiter assembly is used to limit the positive contact sheet (20) when the button battery (12) is removed or installed; an upper cover shell (5) is provided above the liquid crystal (6) and is installed on the outside of the PCB board (13); a glass sheet (4) is glued and connected to the upper side of the upper cover shell (5).

5. The multifunctional digital angle ruler according to claim 1, characterized in that: The first bevel gear (29) is rotatably connected in the slot (22), the first bevel gear (29) is meshingly connected with the second bevel gear (24), a rotating shaft (25) is fixedly connected at the center of the second bevel gear (24), and an end of the rotating shaft (25) away from the second bevel gear (24) is fixedly connected to the first rubber wheel (26).

6. A multifunctional digital angle ruler according to claim 4, characterized in that: The limit assembly comprises a draw hook (21), a limit block (30), a spring block (31) and a first spring (33); the draw hook (21) is fixedly connected to the positive contact sheet (20); the limit block (30) is fixedly connected to the draw hook (21); the first spring (33) is fixedly connected to the PCB board (13); and one end of the first spring (33) away from the PCB board (13) is fixedly connected to the spring block (31).

7. A multifunctional digital angle ruler according to claim 6, characterized in that: A spring seat (32) is provided on the outside of the first spring (33) and is fixedly connected to the PCB board (13); a pressing block (35) is fixedly connected to the outside of the spring block (31); a second spring (37) is fixedly connected below the pressing block (35); one end of the second spring (37) away from the pressing block (35) is fixedly connected to the PCB board (13); and the pressing block (35) and the spring block (31) are slidably connected to the spring seat (32).

8. The multifunctional digital angle ruler according to claim 1, characterized in that: The surfaces of the upper ruler blank (1) and the lower ruler blank (2) are both provided with scales, and the lower cover shell (14), the PCB board (13) and the upper cover shell (5) are all provided with screw holes (40), and the three groups of screw holes (40) are located in corresponding upper and lower positions.

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