Steel tape

Abstract

The utility model relates to the technical field of engineering surveying, and discloses a steel tape which comprises a front cover, a rear cover is arranged on the rear side of the front cover, a rotating rod is rotatably connected to the front side of the front cover, the rear end of the rotating rod penetrates through the front cover and is fixedly connected with a gear, and fixing plates are fixedly connected to the two ends of the rear side of the front cover. And sliding grooves are formed in the rear sides of the two fixing plates correspondingly, sliding blocks are slidably connected into the two sliding grooves correspondingly, racks are fixedly connected to the rear sides of the two sliding blocks correspondingly, the two racks are engaged with the left side and the right side of a gear correspondingly, and clamping plates are fixedly connected to the ends, away from each other, of the rear sides of the two racks correspondingly. According to the steel ruler clamping device, the rotating rod is rotated to drive the gear to rotate, then the clamping plate is driven to move to clamp the steel ruler to achieve the fixed length, the rotating rod is reversely rotated, the clamping plate loosens the steel ruler, the rolling ring automatically retracts the steel ruler, the clamping method cannot loosen along with the increase of the service time, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering measurement, in particular to a steel measuring tape. Background Art

[0002] The steel tape measure has high precision and can accurately measure the length, width and height of an object. The scale is clear and fine, and can be accurate to millimeter units, meeting various occasions with requirements for dimensional accuracy. The steel tape measure has good stability and is not affected by environmental factors such as temperature and humidity. It can maintain relatively stable measurement accuracy under different environmental conditions.

[0003] After searching, the Chinese patent announcement number is: CN209131528U. The utility model discloses a steel tape measure, which is used in the field of engineering measurement. The key points of its technical solution are that it includes a box body, a tape measure body arranged in the box body, and a telescopic opening opened on the box body for one end of the tape measure body to extend out. The box body is provided with two scrapers at the telescopic opening, and the two scrapers extend toward the tape measure body and respectively conflict with the two sides of the tape measure body; the technical effect is that the scrapers can scrape off the dirt on both sides of the tape measure body during the measurement process, thereby reducing the possibility of dirt entering the inside of the box body and affecting the tape measure body to get stuck when it is used next time. However, in actual use, the device uses a spring to clamp the tape measure. During long-term use, the spring will gradually lose its clamping force, causing the clamping to become loose. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a steel measuring tape, which aims to improve the problem in the prior art that the spring gradually loses its clamping force during long-term use, thereby causing the clamping to become loose.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a steel tape measure, including a front cover, a rear cover is provided on the rear side of the front cover, the front side of the front cover is rotatably connected to a rotating rod, the rear end of the rotating rod passes through the front cover and is fixedly connected to a gear, both ends of the rear side of the front cover are fixedly connected to a fixing plate, the rear sides of the two fixing plates are provided with a sliding groove, the interior of the two sliding grooves are slidably connected to a sliding block, the rear sides of the two sliding blocks are fixedly connected to a rack, the two racks are respectively meshed with the left and right sides of the gear, and the rear ends of the two racks are fixedly connected to a clamping plate away from each other, the rear end of the rotating rod is rotatably connected to the fixing rod, the rear end of the fixing rod is fixedly connected to the front side of the rear cover, the outer wall of the fixing rod is rotatably connected to a winding ring, and one side of the outer wall of the winding ring is fixedly connected to a steel ruler, and a decontamination mechanism is provided on the right side of the front cover.

[0006] Through the above technical solution: when it is necessary to fix the extended length of the steel ruler, the rotating rod is rotated, and the rotating rod drives the gear to rotate. Since the gear is meshed and connected with the two racks respectively, and the racks slide in the sliding groove on the rear side of the fixed plate through the sliding block, when the gear rotates, it will drive the two racks to move in opposite directions. As the racks move, the clamping plate on the rear side will also move accordingly. When the two clamping plates approach each other and clamp the steel ruler, the extended length of the steel ruler can be fixed to prevent it from retracting. When the measurement is completed and the steel ruler needs to be retracted, the rotating rod is rotated in the opposite direction to reverse the gear, thereby driving the two racks to move away from each other, and the clamping plate releases the steel ruler. At this time, the winding ring automatically winds the steel ruler back around the outer wall of the winding ring under the action of its own elasticity or other reset devices.

[0007] As a further description of the above technical solution:

[0008] The decontamination mechanism includes a horizontal plate, which is fixedly connected to the right side of the front cover. The front and rear sides of the horizontal plate are provided with movable grooves, and both ends of the right side of the horizontal plate are provided with limiting holes. The interiors of the two movable grooves are slidably connected to cleaning plates, and the right sides of the two cleaning plates are provided with circular grooves. One side of the interior of the two circular grooves is fixedly connected to a spring, and the right ends of the two springs are fixedly connected to a limiter.

[0009] Through the above technical solution: when the steel ruler is stained with stains during use and needs to be cleaned, the two cleaning plates are moved to slide in the movable grooves on the front and rear sides of the horizontal plate, and the cleaning plates are slid toward the steel ruler. At this time, when the cleaning plates slide to the appropriate position so that the steel ruler is located between the cleaning plates, the spring in the circular groove will push the limiter to move to the right, and the limiter will be inserted into the limiting hole under the action of the spring, thereby fixing the position of the cleaning plates. In this way, the two cleaning plates can tightly clamp the steel ruler. During the retraction process of the steel ruler, the cleaning plates can effectively remove stains on the surface of the steel ruler. After the retraction is completed, the limiter is manually pushed out of the limiting hole, the spring is compressed, and then the cleaning plates are pushed back to their original position for next use.

[0010] As a further description of the above technical solution:

[0011] The rear side of the front cover is fixedly connected with a plurality of limit columns at equal intervals, and the rear side of the rear cover is rotatably connected with a plurality of limit bolts at equal intervals. The plurality of limit bolts all penetrate the rear cover and are rotatably connected to the rear ends of the limit columns.

[0012] Through the above technical solution: by equidistantly arranging multiple limit columns and matching limit bolts, the connection between the front cover and the rear cover can be made more uniform and tight, preventing loosening or deformation during use, and ensuring the measurement accuracy of the steel tape measure.

[0013] As a further description of the above technical solution:

[0014] The rear side of the back cover is fixedly connected with a buckle, and the buckle is made of elastic material.

[0015] Through the above technical solution: the buckle is made of elastic material, which can be used to fix the steel tape measure to a specific position or object, making it convenient to carry and use.

[0016] As a further description of the above technical solution:

[0017] A cylinder is fixedly connected to one side adjacent to the front cover and the rear cover, an outer wall of the cylinder is rotatably connected to a rotating plate, and a right end of the rotating plate is rotatably connected to a moving plate.

[0018] Through the above technical solution: when the steel tape measure is not in use, the steel tape measure can also be protected to a certain extent by the rotating plate and the movable plate.

[0019] As a further description of the above technical solution:

[0020] The front side of the front cover is fixedly connected with a laser pen, and the right end of the laser pen is rotatably connected with a laser head.

[0021] Through the above technical solution: the laser pointer and the rotatable laser head can provide auxiliary aiming function for measurement and can detect whether the measurement is a straight line.

[0022] As a further description of the above technical solution:

[0023] The front end of the rotating rod is fixedly connected with a rotating disk, and a plurality of friction grooves are equidistantly arranged on the front side of the rotating disk.

[0024] Through the above technical solution: the turntable makes it convenient for users to rotate the turning rod, thereby operating the clamping plate to fix or loosen the steel ruler, and multiple friction grooves equidistantly opened on the front side of the turntable can increase friction.

[0025] As a further description of the above technical solution:

[0026] The two sliding blocks slide in the corresponding sliding grooves respectively, and the sizes of the sliding blocks are consistent with those of the sliding grooves.

[0027] Through the above technical solution: it is ensured that the rack can accurately engage with the gear for transmission, so that the clamping plate can move smoothly, and reliable clamping and releasing operations of the steel ruler can be achieved.

[0028] The utility model has the following beneficial effects:

[0029] 1. In the utility model, by pulling the steel ruler outward, the winding ring rotates on the outer wall of the fixed rod to extend the steel ruler. Rotating the rotating rod drives the gear to rotate, causing the rack to slide in the sliding groove, thereby driving the clamping plate to move and clamp the steel ruler to achieve a fixed length. Rotating the rotating rod in the opposite direction, the gear reverses, the clamping plate releases the steel ruler, and the winding ring automatically retracts the steel ruler. This clamping method will not become loose with the increase of use time, thereby extending the service life.

[0030] 2. In the utility model, when the steel ruler is stained, the cleaning plate is slid toward the steel ruler so that the steel ruler is located between the cleaning plates. The spring in the circular groove pushes the limiter to insert into the limiting hole, fixing the position of the cleaning plate to achieve clamping of the steel ruler. During the retraction process of the steel ruler, the cleaning plate effectively removes the stains, thereby realizing the convenient cleaning function of the steel ruler stains. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A three-dimensional diagram of a steel measuring tape proposed in the present invention;

[0032] Figure 2 This is a rear view of the structure of a steel tape measure proposed by the utility model;

[0033] Figure 3 This is a structural breakdown diagram of a steel tape measure proposed in the utility model;

[0034] Figure 4 This is a disassembled diagram of the front cover structure of a steel tape measure proposed in the utility model;

[0035] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0036] Legend:

[0037] 1. Front cover; 2. Decontamination mechanism; 201. Horizontal plate; 202. Moving groove; 203. Limiting hole; 204. Cleaning plate; 205. Circular groove; 206. Spring; 207. Limiter; 3. Back cover; 4. Turntable; 5. Turning rod; 6. Gear; 7. Fixed plate; 8. Sliding groove; 9. Sliding block; 10. Rack; 11. Clamping plate; 12. Fixed rod; 13. Rolling ring; 14. Steel ruler; 15. Limiting column; 16. Limiting bolt; 17. Buckle; 18. Moving plate; 19. Cylinder; 20. Rotating plate; 21. Laser pen; 22. Laser head; 23. Friction groove. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] Reference Figure 1 、 Figure 3 and Figure 4 , the utility model provides an embodiment: a steel tape measure, including a front cover 1, the front cover 1 plays the role of protecting the internal structure and providing support, the rear side of the front cover 1 is provided with a rear cover 3, the rear cover 3 and the front cover 1 together constitute the outer shell of the steel tape measure, protecting the internal parts, the front side of the front cover 1 is rotatably connected to a rotating rod 5, the rotating rod 5 is used to transmit rotational power, the rear end of the rotating rod 5 passes through the front cover 1 and is fixedly connected to a gear 6, the gear 6 can drive the rack 10 to move, the two ends of the rear side of the front cover 1 are fixedly connected to fixed plates 7, the fixed plates 7 provide installation positions for the sliding grooves 8, the rear sides of the two fixed plates 7 are provided with sliding grooves 8, the sliding grooves 8 provide guides for the sliding blocks 9, the interiors of the two sliding grooves 8 are slidably connected with sliding blocks 9, the sliding blocks 9 slide smoothly in the sliding grooves 8, and the two slides The rear sides of the moving blocks 9 are fixedly connected with racks 10, which cooperate with the gear 6 to realize the movement of the clamping plate 11. The two racks 10 are respectively meshed with the left and right sides of the gear 6. The rear sides of the two racks 10 are fixedly connected with the clamping plates 11 away from one end. The clamping plates 11 are used to clamp the steel ruler 14. The rear end of the rotating rod 5 is rotatably connected with the fixed rod 12, and the fixed rod 12 provides support for the winding ring 13. The rear end of the fixed rod 12 is fixedly connected to the front side of the rear cover 3. The outer wall of the fixed rod 12 is rotatably connected with the winding ring 13. The winding ring 13 can be rotated around the fixed rod 12 to retract the steel ruler 14. The outer wall side of the winding ring 13 is fixedly connected with the steel ruler 14. The steel ruler 14 is used to measure the length. A decontamination mechanism 2 is provided on the right side of the front cover 1. The decontamination mechanism 2 can clean the stains on the steel ruler 14.

[0040] When the measuring tape 14 is needed to be retracted, the measuring tape 14 is pulled outward, and the winding ring 13 rotates on the outer wall of the fixing rod 12, so that the measuring tape 14 can be pulled out smoothly. When the extended length of the measuring tape 14 needs to be fixed, the rotating rod 5 drives the gear 6 to rotate, and the rack 10 slides in the sliding groove 8 on the rear side of the fixing plate 7 through the sliding block 9. Therefore, when the gear 6 rotates, it drives the two racks 10 to move in opposite directions. As the rack 10 moves, the clamping plate 11 on the rear side also moves accordingly. When the two clamping plates 11 approach each other and clamp the measuring tape 14, the extended length of the measuring tape 14 can be fixed to prevent it from retracting. When the measurement is completed and the measuring tape 14 needs to be retracted, the rotating rod 5 is rotated in the opposite direction, so that the gear 6 is reversed, and the two racks 10 are driven to move in the direction away from each other, and the clamping plate 11 releases the measuring tape 14. At this time, the winding ring 13 automatically winds the measuring tape 14 back on the outer wall of the winding ring 13 under the action of its own elasticity or other reset devices.

[0041] Reference Figure 1 and Figure 5 The decontamination mechanism 2 includes a horizontal plate 201, which is fixedly connected to the right side of the front cover 1. The front and rear sides of the horizontal plate 201 are provided with movable grooves 202, and the movable grooves 202 provide guides for the sliding of the cleaning plate 204. The right ends of the horizontal plate 201 are provided with limit holes 203, and the limit holes 203 are used to cooperate with the limiters 207 to fix the position of the cleaning plate 204. The inside of the two movable grooves 202 is slidably connected to the cleaning plate 204, and the cleaning plate 204 can clean the steel ruler 14. The right sides of the two cleaning plates 204 are provided with circular grooves 205, and the circular grooves 205 provide installation space for the spring 206 and the limiter 207. The inner side of the two circular grooves 205 is fixedly connected to the spring 206, and the spring 206 provides elastic force for the limiter 207. The right ends of the two springs 206 are fixedly connected to the limiter 207, and the limiter 207 can cooperate with the limit hole 203 to fix the cleaning plate 204;

[0042] Specifically, when the steel ruler 14 is stained with stains during use and needs to be cleaned, the cleaning plate 204 is slid toward the steel ruler 14. When the cleaning plate 204 slides to the appropriate position so that the steel ruler 14 is located between the cleaning plates 204, the spring 206 in the circular groove 205 will push the limiter 207 to move to the right. The limiter 207 will be inserted into the limiting hole 203 under the action of the spring 206, thereby fixing the position of the cleaning plate 204. The two cleaning plates 204 clamp the steel ruler 14. During the retraction process of the steel ruler 14, the cleaning plate 204 can effectively remove stains on the surface of the steel ruler 14. When the retraction is completed, the limiter 207 is pushed out of the limiting hole 203, the spring 206 is compressed, and then the cleaning plate 204 is pushed back to its original position for the next use.

[0043] Reference Figure 2 and Figure 3The rear side of the front cover 1 is equidistantly fixedly connected with a plurality of limit columns 15, and the limit columns 15 are used to cooperate with the limit bolts 16 to connect the front cover 1 and the rear cover 3. The rear side of the rear cover 3 is equidistantly rotatably connected with a plurality of limit bolts 16, which can firmly connect the front cover 1 and the rear cover 3 together. The plurality of limit bolts 16 all penetrate the rear cover 3 and are rotatably connected to the rear end of the limit columns 15. The rear side of the rear cover 3 is fixedly connected with a buckle 17, which can be used to fix the steel tape measure in a specific position. The buckle 17 is made of elastic material, and the buckle 17 made of elastic material is convenient for fixing and removing the steel tape measure. The adjacent side of the front cover 1 and the rear cover 3 is fixedly connected with a cylinder 19, and the cylinder 19 provides a rotating support for the rotating plate 20. The outer wall of the cylinder 19 is rotatably connected with a rotating plate 20, and the rotating plate 20 can be adjusted in angle. The right end of the rotating plate 20 is rotatably connected with a movable plate 18, and the movable plate 18 can cooperate with the rotating plate 20 to adjust its position;

[0044] Specifically, by equidistantly arranging a plurality of limit columns 15 and the limit bolts 16 that cooperate therewith, the connection between the front cover 1 and the rear cover 3 can be made more uniform and tight, preventing loosening or deformation during use and ensuring the measurement accuracy of the steel tape measure. The buckle 17 is made of elastic material and can be used to fix the steel tape measure to a specific position or object, making it convenient to carry and use. When the steel tape measure is not in use, the steel ruler 14 can also be protected to a certain extent by the rotating plate 20 and the movable plate 18.

[0045] Reference Figure 1 The front side of the front cover 1 is fixedly connected to a laser pen 21, which can provide auxiliary aiming function. The right end of the laser pen 21 is rotatably connected to a laser head 22, which can adjust the irradiation direction of the laser. The front end of the rotating rod 5 is fixedly connected to a turntable 4, which is convenient for the user to rotate the rotating rod 5. A plurality of friction grooves 23 are equidistantly provided on the front side of the turntable 4. The friction grooves 23 can increase friction to facilitate the operation of the turntable 4. The two sliding blocks 9 slide in the corresponding sliding grooves 8 respectively. The sliding blocks 9 slide in the sliding grooves 8 to provide guidance for the movement of the rack 10. The sliding blocks 9 are consistent in size with the sliding grooves 8. The consistent size can ensure the smoothness and accuracy of the sliding.

[0046] Specifically, the laser pen 21 and the rotatable laser head 22 can provide auxiliary aiming function for measurement. In some cases where precise measurement is required or it is difficult to directly see the starting and ending points of the measurement, the turntable 4 allows the user to rotate the rotating rod 5 to operate the clamping plate 11 to fix or release the steel ruler 14. The multiple friction grooves 23 equidistantly opened on the front side of the turntable 4 can increase the friction force, ensuring that the rack 10 can accurately engage with the gear 6 for transmission, so that the clamping plate 11 can move smoothly, realizing reliable clamping and release operations of the steel ruler 14.

[0047] Working principle: When it is necessary to use a steel tape measure for measurement, pull the steel ruler 14 outward, and the winding ring 13 rotates on the outer wall of the fixed rod 12, so that the steel ruler 14 can be pulled out smoothly. When it is necessary to fix the extended length of the steel ruler 14, rotate the rotating rod 5 to drive the gear 6 to rotate, and the rack 10 slides in the sliding groove 8 on the rear side of the fixed plate 7 through the sliding block 9. Therefore, when the gear 6 rotates, it will drive the two racks 10 to move in opposite directions. As the rack 10 moves, the clamping plate 11 on the rear side will also move accordingly. When the two clamping plates 11 approach each other and clamp the steel ruler 14, the extended length of the steel ruler 14 can be fixed to prevent it from retracting. When the measurement is completed and the steel ruler 14 needs to be retracted, rotate the rotating rod 5 in the opposite direction to reverse the gear 6, thereby driving the two racks 10 to move away from each other, and the clamping plate 11 releases the steel ruler 14. At this time, the winding ring 13 is on its own Under the action of elasticity or other reset devices, the steel ruler 14 is automatically wound back on the outer wall of the winding ring 13, and when the steel ruler 14 is stained with stains during use and needs to be cleaned, the cleaning plate 204 is slid toward the steel ruler 14. When the cleaning plate 204 slides to the appropriate position so that the steel ruler 14 is located between the cleaning plates 204, the spring 206 in the circular groove 205 will push the limiter 207 to move to the right, and the limiter 207 will be inserted into the limiting hole 203 under the action of the spring 206, thereby fixing the position of the cleaning plate 204. The two cleaning plates 204 clamp the steel ruler 14. During the retraction process of the steel ruler 14, the cleaning plate 204 can effectively remove stains on the surface of the steel ruler 14. When the retraction is completed, the limiter 207 is pushed out of the limiting hole 203, the spring 206 is compressed, and then the cleaning plate 204 is pushed back to its original position for the next use.

[0048] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A steel tape measure, comprising a front cover (1), characterized in that: The rear side of the front cover (1) is provided with a rear cover (3), the front side of the front cover (1) is rotatably connected to a rotating rod (5), the rear end of the rotating rod (5) passes through the front cover (1) and is fixedly connected to a gear (6), both ends of the rear side of the front cover (1) are fixedly connected to fixed plates (7), the rear sides of the two fixed plates (7) are provided with sliding grooves (8), the interiors of the two sliding grooves (8) are slidably connected to sliding blocks (9), the rear sides of the two sliding blocks (9) are fixedly connected to racks (10), and the two The racks (10) are respectively meshed with the left and right sides of the gear (6); the rear ends of the two racks (10) are fixedly connected to a clamping plate (11); the rear end of the rotating rod (5) is rotatably connected to a fixed rod (12); the rear end of the fixed rod (12) is fixedly connected to the front side of the rear cover (3); the outer wall of the fixed rod (12) is rotatably connected to a reel (13); one side of the outer wall of the reel (13) is fixedly connected to a steel ruler (14); and a decontamination mechanism (2) is provided on the right side of the front cover (1).

2. A steel tape measure according to claim 1, characterized in that: The decontamination mechanism (2) comprises a transverse plate (201), the transverse plate (201) being fixedly connected to the right side of the front cover (1), the front and rear sides of the transverse plate (201) both being provided with movable grooves (202), both ends of the right side of the transverse plate (201) being provided with limiting holes (203), the interiors of the two movable grooves (202) being slidably connected to cleaning plates (204), the right sides of the two cleaning plates (204) being provided with circular grooves (205), the interiors of the two circular grooves (205) being fixedly connected to springs (206), and the right ends of the two springs (206) being fixedly connected to limiters (207).

3. The steel measuring tape according to claim 1, characterized in that: The rear side of the front cover (1) is fixedly connected to a plurality of limiting columns (15) at equal intervals, and the rear side of the rear cover (3) is rotatably connected to a plurality of limiting bolts (16) at equal intervals. The plurality of limiting bolts (16) all penetrate the rear cover (3) and are rotatably connected to the rear ends of the limiting columns (15).

4. The steel measuring tape according to claim 1, characterized in that: A buckle (17) is fixedly connected to the rear side of the rear cover (3), and the buckle (17) is made of elastic material.

5. The steel measuring tape according to claim 1, characterized in that: A cylinder (19) is fixedly connected to one side adjacent to the front cover (1) and the rear cover (3); an outer wall of the cylinder (19) is rotatably connected to a rotating plate (20); and a right end of the rotating plate (20) is rotatably connected to a moving plate (18).

6. The steel measuring tape according to claim 1, characterized in that: A laser pen (21) is fixedly connected to the front side of the front cover (1), and a laser head (22) is rotatably connected to the right end of the laser pen (21).

7. The steel measuring tape according to claim 1, characterized in that: The front end of the rotating rod (5) is fixedly connected to a rotating disk (4), and a plurality of friction grooves (23) are equidistantly provided on the front side of the rotating disk (4).

8. The steel measuring tape according to claim 1, characterized in that: The two sliding blocks (9) slide inside the corresponding sliding grooves (8) respectively, and the sizes of the sliding blocks (9) are consistent with those of the sliding grooves (8).

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