Steel tape verification tool

Abstract

The utility model discloses a steel tape verification tool, and relates to the technical field of steel tape verification. The device comprises a supporting base, a standard ruler is fixedly installed on the surface of the supporting base, a limiting adjusting mechanism is arranged on the surface of the supporting base, a center clamping mechanism is arranged on the surface of the supporting base, a plurality of pressing and fixing mechanisms are arranged on the surface of the supporting base, and clamping limiting mechanisms are arranged in the pressing and fixing mechanisms. According to the utility model, the steel tape head and the standard tape which are aligned are fixed through the limit adjusting mechanism, the center clamping mechanism fixes the tape shell and keeps coaxial with the tape head, and the sliding tape shell translates and sequentially passes through the plurality of pressing and fixing mechanisms to press and fix the tape, so that the clamping limit mechanism applies axial constraint to the tape; the multi-stage constraint design can significantly inhibit the residual stress release phenomenon when the long ruler is pulled out, eliminates local arching and snaking offset or bending, and forces the middle scale line of the steel tape to be strictly coplanar and parallel to the standard ruler, thereby improving the accuracy of verification data.

Description

Technical Field

[0001] This utility model belongs to the field of steel tape measure calibration technology, and specifically relates to a steel tape measure calibration fixture. Background Technology

[0002] A steel tape measure is a portable length measuring tool made of thin, flexible steel strip with graduations (usually in both metric and imperial units). It can be rolled up and stored in a round casing. Measurements are taken by fixing the front end of the tape measure, straightening it, and applying tension. The tape measure head is typically a hook, a flat pull head, or a hole head to suit different measurement scenarios. After production, the steel tape measure needs to be calibrated to ensure the accuracy of the graduations, requiring the use of calibration fixtures.

[0003] According to the Chinese Patent Announcement No. CN220818770U, a steel tape measure calibration platform machine includes a main frame, a steel tape measure head clamping block is installed at one end of the main frame, a standard scale groove is opened on the surface of the main frame, a cavity is opened inside the main frame, the standard scale groove is connected to the cavity, and a light source facing the standard scale groove is fixedly connected inside the cavity.

[0004] However, the aforementioned device, when combined with existing steel tape measure calibration fixtures, directly pulls the tape measure horizontally for calibration after fixing the tape head. Although there is a supporting plane below the steel tape measure, due to its long length and flexible steel strip material, residual stress generated during the manufacturing process is released unevenly during stretching, causing local stress concentration. Secondly, the direction of the pulling force applied by the operator is difficult to keep perfectly collinear with the tape strip axis, generating a lateral component force. This makes the middle area of ​​the tape measure prone to local arching (detachment from the supporting surface) or lateral serpentine deviation (S-shaped bending). This non-linear deformation and positional deviation make it impossible for the scale lines in the middle area of ​​the steel tape measure to be strictly coplanar and parallel with the parallel standard tape. This results in significant parallax errors and positioning difficulties for the calibrator at key alignment points (especially in the middle), ultimately severely reducing the accuracy of the length calibration data. Utility Model Content

[0005] In response to the problem in related technologies that the graduation lines in the middle area of ​​a steel tape measure cannot be strictly coplanar and parallel with a parallel standard ruler, resulting in significant parallax errors and positioning difficulties for inspectors at key alignment points, this utility model proposes a steel tape measure inspection fixture to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model is a steel tape measure calibration fixture, including a support base, a standard ruler fixedly installed on the surface of the support base, a limit adjustment mechanism provided on the surface of the support base, a central clamping mechanism provided on the surface of the support base, and several pressing mechanisms provided on the surface of the support base, with clamping and limiting mechanisms provided inside the several pressing mechanisms.

[0008] The limiting adjustment mechanism is used to fix the steel tape measure head, the clamping end of the central clamping mechanism is used to clamp and fix the tape measure shell, so that the central clamping mechanism drives the tape measure to move on the support base through the tape measure shell, the pressing mechanism is used to squeeze the moving tape measure, and the clamping limiting mechanism limits the tape measure under the drive of the pressing mechanism.

[0009] Furthermore, the limiting adjustment mechanism includes a fixed frame, which is slidably connected inside the support base. A limiting groove is formed on the surface of the support base. A base plate is fixedly connected to the bottom of the fixed frame. A spring is sleeved on the surface of the fixed frame. One end of the spring is fixedly connected to the bottom of the support base, and the other end of the spring is fixedly connected to the surface of the base plate. A positioning post is fixedly connected inside the limiting groove. A bidirectional screw is rotatably connected inside the support base. An adjusting plate is threadedly connected to the surface of the bidirectional screw, and the adjusting plate is slidably connected inside the limiting groove.

[0010] Furthermore, a limiting post is fixedly connected inside the fixed frame, and a moving block is slidably connected to the surface of the limiting post. The moving block is slidably connected inside the fixed frame, and an adjusting bolt is rotatably connected to one end of the fixed frame. One end of the adjusting bolt is threadedly connected to the surface of the moving block, and a second positioning post is fixedly connected to the bottom of the moving block.

[0011] Furthermore, the central clamping mechanism includes a guide rail, which is fixedly connected to the surface of the support base. A sliding frame is fixedly installed on the slider end of the guide rail surface. A bidirectional screw is rotatably connected inside the sliding frame. A clamping plate is threadedly connected to the surface of the bidirectional screw, and anti-slip strips are provided on the surface of the clamping plate.

[0012] Furthermore, a scraper is fixedly connected to one side of the sliding frame, the scraper is slidably connected to the surface of the support base, a fixing bolt is threaded onto the surface of the scraper, a fixing hole is opened on the surface of the support base, and one end of the fixing bolt is engaged in the fixing hole.

[0013] Furthermore, the clamping mechanism includes a sliding rod, which is fixedly connected to the bottom of the support base. An adjusting frame is slidably connected to the surface of the sliding rod, and a clamping frame is slidably connected to the top of the adjusting frame. A second spring is sleeved on the surface of the clamping frame, one end of the second spring is fixedly connected to the surface of the clamping frame, and the other end of the second spring is fixedly connected to the inside of the adjusting frame. A pressure roller is rotatably connected inside the clamping frame.

[0014] Furthermore, the clamping and limiting mechanism includes a second bidirectional screw, which is rotatably connected inside the pressure roller. A clamping plate is slidably connected to the surface of the second bidirectional screw, which is slidably connected inside the pressure roller. A compensation ring is fixedly connected to the surface of the pressure roller.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model uses a limiting adjustment mechanism to fix the aligned steel tape measure head and standard ruler at the limiting end. The clamping end of the central clamping mechanism clamps and fixes the tape measure shell and keeps it coaxial with the tape head. The sliding central clamping mechanism drives the tape measure shell to translate, so that the tape measure passes through several pressing mechanisms in sequence to press and fix the tape measure. This allows the clamping and limiting mechanism to apply axial constraint to the tape measure, achieving precise alignment between the tape measure body and the standard ruler. This multi-level constraint design can significantly suppress the residual stress release phenomenon when the long tape measure is pulled out, eliminate local arching, serpentine offset or bending, and force the scale line in the middle of the steel tape measure to be strictly coplanar and parallel with the standard ruler, thereby improving the accuracy of the calibration data.

[0017] 2. This utility model addresses the issue of securing different steel tape measure heads, such as hook heads, flat pull heads, or hole heads, by using corresponding positioning ends. For hook heads, positioning pin one engages the tape measure head; for flat pull heads and hole heads, positioning pin two engages the tape measure head. First, the starting scale of the tape measure head is aligned with the scale of the standard tape measure. The hook head is then clamped and limited by rotating a bidirectional screw and a three-drive adjustment plate. For flat pull heads and hole heads, positioning pin two is moved and aligned by rotating an adjustment bolt. Finally, a spring drives the base plate, causing the fixing frame to press down and stabilize the tape measure, thus adapting to the fixing needs of different tape measure head models.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the utility model embodiments, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the bottom structure of this utility model;

[0022] Figure 3 This is a partial cross-sectional structural diagram of the present invention;

[0023] Figure 4 This is a partial structural diagram of the central clamping mechanism of this utility model;

[0024] Figure 5 This is a schematic diagram of the limit adjustment mechanism of this utility model;

[0025] Figure 6 This is a cross-sectional structural diagram of the compression mechanism of this utility model.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Support base; 2. Standard ruler; 3. Limit adjustment mechanism; 301. Fixing frame; 302. Limiting groove; 303. Base plate; 304. Spring 1; 305. Positioning post 1; 306. Two-way screw 3; 307. Adjusting plate; 308. Limiting post; 309. Moving block; 310. Adjusting bolt; 311. Positioning post 2; 4. Center clamping mechanism; 401. Guide rail; 402. Sliding frame; 403. Two-way screw 1; 404. Clamping plate; 405. Anti-slip strip; 406. Scraper; 407. Fixing bolt; 408. Fixing hole; 5. Pressing mechanism; 501. Sliding rod; 502. Adjusting frame; 503. Pressing frame; 504. Spring 2; 505. Pressure roller; 6. Clamping and limiting mechanism; 601. Two-way screw 2; 602. Clamping plate; 603. Compensation ring. Detailed Implementation

[0028] The technical solutions of the utility model embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the utility model, and not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the utility model.

[0029] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0030] Please see Figures 1-6As shown, this utility model is a steel tape measure calibration fixture, including a support base 1, a standard ruler 2 fixedly installed on the surface of the support base 1, a limit adjustment mechanism 3 provided on the surface of the support base 1, a central clamping mechanism 4 provided on the surface of the support base 1, and a plurality of pressing mechanisms 5 provided on the surface of the support base 1, with a clamping and limiting mechanism 6 provided inside the plurality of pressing mechanisms 5.

[0031] The limit adjustment mechanism 3 is used to fix the steel tape measure head, the clamping end of the central clamping mechanism 4 is used to clamp and fix the tape shell, so that the central clamping mechanism 4 drives the tape to move on the support base 1 through the tape shell, the pressing mechanism 5 is used to squeeze the moving tape, and the clamping limit mechanism 6 limits the tape under the drive of the pressing mechanism 5.

[0032] The steel tape measure head is fixed by the limiting end of the limiting adjustment mechanism 3. The limiting adjustment mechanism 3 can adapt to different styles of steel tape measure heads, so that the starting scale of the steel tape measure head is aligned with the starting scale of the standard ruler 2. Then, the tape cover is fixed to the clamping end of the central clamping mechanism 4, so that the tape cover and the tape head are on the same axis. Then, several pressing mechanisms 5 are pulled upward, so that their pressing ends are displaced upward. The sliding central clamping mechanism 4 drives the tape cover to move horizontally, so that the tape passes through several pressing mechanisms 5 in sequence. Several pressing mechanisms 5 are released so that their pressing ends press the tape. Then, the central clamping mechanism 4 is fixed to one side of the support base 1. The clamping limiting mechanism 6 is rotated to apply axial constraint to the tape, so as to achieve precise alignment between the tape body and the standard ruler 2.

[0033] The steel tape measure head and standard ruler 2 are fixed and aligned by the limiting end of the limiting adjustment mechanism 3. The clamping end of the central clamping mechanism 4 clamps and fixes the tape shell and keeps it coaxial with the tape head. The sliding central clamping mechanism 4 drives the tape shell to translate, so that the tape passes through several pressing mechanisms 5 in sequence to press and fix the tape, so that the clamping limiting mechanism 6 applies axial constraint to the tape, achieving precise alignment between the tape body and the standard ruler 2. This multi-level constraint design can significantly suppress the residual stress release phenomenon when the long tape is pulled out, eliminate local arching and serpentine offset or bending, and force the scale line in the middle of the steel tape measure to be strictly coplanar and parallel with the standard ruler 2, thereby improving the accuracy of the calibration data.

[0034] In one embodiment, the limiting adjustment mechanism 3 includes a fixed frame 301, which is slidably connected to the inside of the support base 1. A limiting groove 302 is formed on the surface of the support base 1. A base plate 303 is fixedly connected to the bottom of the fixed frame 301. A spring 304 is sleeved on the surface of the fixed frame 301. One end of the spring 304 is fixedly connected to the bottom of the support base 1, and the other end is fixedly connected to the surface of the base plate 303. A positioning post 305 is fixedly connected inside the limiting groove 302. A bidirectional screw 306 is rotatably connected, and an adjusting plate 307 is threadedly connected to the surface of the bidirectional screw 306. The adjusting plate 307 is slidably connected inside the limiting groove 302. A limiting post 308 is fixedly connected inside the fixed frame 301. A moving block 309 is slidably connected to the surface of the limiting post 308. The moving block 309 is slidably connected inside the fixed frame 301. An adjusting bolt 310 is rotatably connected to one end of the fixed frame 301. One end of the adjusting bolt 310 is threadedly connected to the surface of the moving block 309. A positioning post 311 is fixedly connected to the bottom of the moving block 309.

[0035] Since steel measuring tape heads are divided into hook heads, flat pull heads, or hole heads, when fixing a hook head, the steel measuring tape head is engaged with the surface of the positioning post 305 on the side of the limiting groove 302, aligning the starting scale of the steel measuring tape head with the starting scale of the standard ruler 2. Rotating the double-acting screw 306 causes the adjusting plate 307 to move towards the steel measuring tape head, thus clamping and limiting the steel measuring tape head. When fixing a flat pull head or hole head, the steel measuring tape head is engaged with the positioning post 305. 11. Rotate the adjusting bolt 310 to make the adjusting bolt 310 drive the moving block 309 to slide on the surface of the limiting post 308, so that the moving block 309 drives the positioning post 311 to move, so that the positioning post 311 drives the starting scale of the steel tape measure head to align with the starting scale of the standard ruler 2. Through the spring 304, the base plate 303 is driven to move downward, so that the base plate 303 drives the fixing frame 301 to contact the top of the steel tape measure head, thereby stabilizing the steel tape measure head and making it adaptable to different models of steel tape measure heads.

[0036] In one embodiment, the central clamping mechanism 4 includes a guide rail 401, which is fixedly connected to the surface of the support base 1. A sliding frame 402 is fixedly installed on the slider end of the guide rail 401. A bidirectional screw 403 is rotatably connected inside the sliding frame 402. A clamping plate 404 is threadedly connected to the surface of the bidirectional screw 403. An anti-slip strip 405 is provided on the surface of the clamping plate 404. A scraper 406 is fixedly connected to one side of the sliding frame 402. The scraper 406 is slidably connected to the surface of the support base 1. A fixing bolt 407 is threadedly connected to the surface of the scraper 406. A fixing hole 408 is provided on the surface of the support base 1. One end of the fixing bolt 407 is engaged in the fixing hole 408.

[0037] The ruler shell is placed inside the sliding frame 402. By rotating the double-acting screw 403, the double-acting screw 403 drives the clamping plate 404 to contact both sides of the ruler shell, thus clamping and fixing the ruler shell. When the anti-slip strip 405 contacts the ruler shell, the anti-slip strip 405 can prevent damage to the surface of the ruler shell. Then, the sliding frame 402 is moved to slide on the surface of the guide rail 401, so that the scraper 406 slides on the surface of the support base 1, which can scrape away dust and debris on the surface of the support base 1. Then, the scraper 406 is moved to the fixing hole 408. By rotating the fixing bolt 407, one end of the fixing bolt 407 is engaged in the fixing hole 408, thus fixing the sliding frame 402.

[0038] In one embodiment, the aforementioned clamping mechanism 5 includes a sliding rod 501, which is fixedly connected to the bottom of the support base 1. An adjusting frame 502 is slidably connected to the surface of the sliding rod 501, and a clamping frame 503 is slidably connected to the top of the adjusting frame 502. A second spring 504 is sleeved on the surface of the clamping frame 503. One end of the second spring 504 is fixedly connected to the surface of the clamping frame 503, and the other end of the second spring 504 is fixedly connected to the inside of the adjusting frame 502. A pressure roller 505 is rotatably connected inside the clamping frame 503.

[0039] Pull the clamping frame 503 upwards, causing it to slide inside the adjusting frame 502. This compresses the second spring 504, causing the clamping frame 503 to move the pressure roller 505 upwards. Then, the ruler body pulled out of the ruler shell passes through the bottom of the pressure roller 505 and is placed on the surface of the support base 1. Then, release the clamping frame 503, causing the second spring 504 to slide the clamping frame 503 inside the adjusting frame 502. This causes the clamping frame 503 to move the pressure roller 505 to contact the ruler body, stabilizing it and preventing warping. At the same time, as the adjusting frame 502 moves on the surface of the sliding rod 501, the adjusting frame 502 moves the clamping frame 503 synchronously, causing the clamping frame 503 to move the pressure roller 505 on the surface of the ruler body.

[0040] In one embodiment, the clamping and limiting mechanism 6 includes a bidirectional screw 601, which is rotatably connected inside the pressure roller 505. A clamping plate 602 is slidably connected to the surface of the bidirectional screw 601, and the clamping plate 602 is slidably connected inside the pressure roller 505. A compensation ring 603 is fixedly connected to the surface of the pressure roller 505.

[0041] When the pressure roller 505 stabilizes the ruler body, the double-acting screw 601 is rotated to drive the clamping plate 602 to move inside the pressure roller 505. The double-acting screw 601 drives the clamping plate 602 to contact both sides of the ruler body. The compensation ring 603 is made of elastic material, so that the compensation ring 603 can adapt to the thickness of the ruler body, thereby enabling the clamping plate 602 to limit the two sides of the ruler body.

[0042] Through the above technical solution, 1. By engaging the steel tape measure head with the positioning post 305 on the side of the limiting groove 302, the starting scale of the steel tape measure head is aligned with the starting scale of the standard ruler 2. Rotating the double-acting screw 306 causes the adjusting plate 307 to move towards the steel tape measure head, clamping and limiting the steel tape measure head. The ruler shell is placed inside the sliding frame 402. By rotating the double-acting screw 403, the clamping plate 404 contacts both sides of the ruler shell, clamping and fixing it. Pulling the pressure frame 503 upwards causes it to slide inside the adjusting frame 502, compressing the spring 504. This causes the pressure frame 503 to move the pressure roller 505 upwards. Then, the ruler body pulled out of the ruler shell passes through... At the bottom of the pressure roller 505, the ruler body is placed on the surface of the support base 1. Then, the scraper 406 is moved to the fixing hole 408. By rotating the fixing bolt 407, one end of the fixing bolt 407 is engaged in the fixing hole 408 to fix the sliding frame 402. Then, the pressure frame 503 is released, and the spring 504 drives the pressure frame 503 to slide inside the adjusting frame 502. The pressure frame 503 drives the pressure roller 505 to contact the ruler body, stabilizing the ruler body and preventing it from warping. The double-acting screw 601 is rotated to drive the clamping plate 602 to move inside the pressure roller 505. The double-acting screw 601 drives the clamping plate 602 to contact both sides of the ruler body. The compensation ring 603 is made of elastic material, so that the compensation ring 603 can adapt to the thickness of the ruler body, thereby allowing the clamping plate 602 to limit the two sides of the ruler body.

[0043] 2. The steel measuring tape head can be categorized into hook head, flat pull head, or hole head, etc. When fixing the hook head, the steel measuring tape head is engaged with the positioning post 305 on the side of the limiting groove 302, aligning the starting graduation of the steel measuring tape head with the starting graduation of the standard ruler 2. Rotating the double-acting screw 306 causes the adjusting plate 307 to move towards the steel measuring tape head, thus clamping and limiting the steel measuring tape head. When fixing the flat pull head or hole head, the steel measuring tape head is engaged with the positioning post 2... On surface 311, rotate adjusting bolt 310 to make adjusting bolt 310 drive moving block 309 to slide on the surface of limit post 308, so that moving block 309 drives positioning post 2 311 to move, so that positioning post 2 311 drives the starting scale of the steel tape measure head to align with the starting scale of standard ruler 2. Through spring 1 304, drive base plate 303 to move downward, so that base plate 303 drives fixing frame 301 to contact the top of steel tape measure head, stabilizing the steel tape measure head so that it can adapt to different models of steel tape measure heads.

[0044] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0045] The preferred embodiments of the utility model disclosed above are merely illustrative of the utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the utility model, thereby enabling those skilled in the art to better understand and utilize it. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A steel tape measure calibration fixture, comprising a support base (1), characterized in that, A standard ruler (2) is fixedly installed on the surface of the support base (1), a limit adjustment mechanism (3) is provided on the surface of the support base (1), a central clamping mechanism (4) is provided on the surface of the support base (1), and a number of pressing mechanisms (5) are also provided on the surface of the support base (1), with clamping and limiting mechanisms (6) provided inside the number of pressing mechanisms (5). The limiting adjustment mechanism (3) is used to fix the steel tape measure head, and the clamping end of the central clamping mechanism (4) is used to clamp and fix the tape shell so that the central clamping mechanism (4) drives the tape to move on the support base (1) through the tape shell. The pressing mechanism (5) is used to squeeze the moving tape, and the clamping limiting mechanism (6) limits the tape under the drive of the pressing mechanism (5).

2. The steel tape measure calibration fixture according to claim 1, characterized in that, The limiting adjustment mechanism (3) includes a fixed frame (301), which is slidably connected to the inside of the support base (1). A limiting groove (302) is opened on the surface of the support base (1). A base plate (303) is fixedly connected to the bottom of the fixed frame (301). A spring (304) is sleeved on the surface of the fixed frame (301). One end of the spring (304) is fixedly connected to the bottom of the support base (1), and the other end of the spring (304) is fixedly connected to the surface of the base plate (303). A positioning post (305) is fixedly connected inside the limiting groove (302). A bidirectional screw (306) is rotatably connected inside the support base (1). An adjusting plate (307) is threadedly connected to the surface of the bidirectional screw (306). The adjusting plate (307) is slidably connected inside the limiting groove (302).

3. The steel tape measure calibration fixture according to claim 2, characterized in that, The fixed frame (301) is internally fixedly connected to a limiting post (308), and a moving block (309) is slidably connected to the surface of the limiting post (308). The moving block (309) is slidably connected inside the fixed frame (301). One end of the fixed frame (301) is rotatably connected to an adjusting bolt (310), and one end of the adjusting bolt (310) is threadedly connected to the surface of the moving block (309). The bottom of the moving block (309) is fixedly connected to a positioning post (311).

4. The steel tape measure calibration fixture according to claim 1, characterized in that, The central clamping mechanism (4) includes a guide rail (401), which is fixedly connected to the surface of the support base (1). A sliding frame (402) is fixedly installed on the slider end of the guide rail (401). A bidirectional screw (403) is rotatably connected inside the sliding frame (402). A clamping plate (404) is threadedly connected to the surface of the bidirectional screw (403). An anti-slip soft strip (405) is provided on the surface of the clamping plate (404).

5. The steel tape measure calibration fixture according to claim 4, characterized in that, A scraper (406) is fixedly connected to one side of the sliding frame (402). The scraper (406) is slidably connected to the surface of the support base (1). A fixing bolt (407) is threadedly connected to the surface of the scraper (406). A fixing hole (408) is opened on the surface of the support base (1). One end of the fixing bolt (407) is engaged in the fixing hole (408).

6. The steel tape measure calibration fixture according to claim 1, characterized in that, The clamping mechanism (5) includes a sliding rod (501), which is fixedly connected to the bottom of the support base (1). An adjusting frame (502) is slidably connected to the surface of the sliding rod (501). A clamping frame (503) is slidably connected to the top of the adjusting frame (502). A second spring (504) is sleeved on the surface of the clamping frame (503). One end of the second spring (504) is fixedly connected to the surface of the clamping frame (503), and the other end of the second spring (504) is fixedly connected to the inside of the adjusting frame (502). A pressure wheel (505) is rotatably connected inside the clamping frame (503).

7. The steel tape measure calibration fixture according to claim 6, characterized in that, The clamping and limiting mechanism (6) includes a bidirectional screw two (601), which is rotatably connected inside the pressure roller (505). A clamping plate (602) is slidably connected to the surface of the bidirectional screw two (601), which is slidably connected inside the pressure roller (505). A compensation ring (603) is fixedly connected to the surface of the pressure roller (505).

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