A symmetrical measuring tape

Abstract

This utility model relates to the field of measuring tool technology, specifically a symmetrical measuring tape, including a main measuring tape assembly. Both sides of the main measuring tape assembly have outer shells. An installation mechanism is installed on the main measuring tape assembly according to the position corresponding to the through hole on the outer shell. Limiting installation rings are provided on both sides of the main measuring tape assembly, and the outer shells of the main measuring tape assembly are designed to be completely symmetrical. A threaded pin is rotatably connected inside the through hole, respectively locking the two outer shells onto the limiting installation rings on both sides of the main measuring tape assembly and fixing them with the threaded pin. At this time, the end of the threaded pin is close to the fastening cylinder inside both ends of the installation mechanism. By twisting the threaded pin, the threaded pin connects to the fastening cylinder, thus achieving a fixing effect. The outer shells of this measuring tape are completely symmetrical, eliminating the need to distinguish between the left and right outer shells during installation, allowing for direct installation and avoiding errors during the installation process, thereby improving work efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring tools, and specifically relates to a symmetrical tape measure. Background Technique

[0002] A tape measure is a retractable measuring tool, which consists of a tape, a case, a braking device, etc. The tape is mostly made of a steel strip or a nylon strip, with scales printed on the surface. Common units include centimeters, meters, inches, etc. When in use, the tape is pulled out to measure dimensions such as length and width. After measurement, the tape is fixed by the braking device, and it can be automatically retracted when released, which is convenient for carrying and storage. It is widely used in construction, decoration, handicraft production and other scenarios, and can flexibly measure straight-line distances. Some tape measures also have a locking function and a hook design to improve the convenience of use.

[0003] After retrieval, a Chinese patent discloses a steel tape measure (CN208968392U), which includes a first tape measure case, a second tape measure case and a measuring tape. Both the first tape measure case and the second tape measure case are provided with a retracting and releasing opening, and further includes a first wear-resistant block arranged at the retracting and releasing opening of the first tape measure case and a second wear-resistant block arranged at the retracting and releasing opening of the second tape measure case; both the first wear-resistant block and the second wear-resistant block are arranged in a "C" shape, and the first wear-resistant block and the second wear-resistant block are symmetrically arranged and sleeved on the outside of the measuring tape. For the steel tape measure of the utility model, the measuring tape does not directly contact the retracting and releasing opening during retraction and release, reducing the friction between the measuring tape and the retracting and releasing opening, reducing the wear of the retracting and releasing openings of the first tape measure case and the second tape measure case, thereby making the steel tape measure not easily damaged and prolonging the service life of the steel tape measure.

[0004] When the above patent is in use, it is proposed that the first tape measure case and the second tape measure case are assembled to form an integral body. However, in actual use, the shapes of these two cases are different. During installation, it is necessary to distinguish between the two first and then align them for installation. The process is rather troublesome, not only adding operation steps and prolonging the assembly time, but also easily confusing the cases, resulting in installation errors, affecting the assembly efficiency. Even it may damage the case or the interface due to forced installation. On the production line, workers also need to spend extra energy distinguishing the cases, which reduces the production rhythm to a certain extent. For this reason, we propose a symmetrical tape measure. Content of the Utility Model

[0005] The technical problem to be solved by this application is: the shapes of these two cases are different. During installation, it is necessary to distinguish between the two first and then align them for installation. The process is rather troublesome, not only adding operation steps and prolonging the assembly time, but also easily confusing the cases, resulting in installation errors, affecting the assembly efficiency. Even it may damage the case or the interface due to forced installation. On the production line, workers also need to spend extra energy distinguishing the cases, which reduces the production rhythm to a certain extent. To address the aforementioned technical problems, this application provides a symmetrical measuring tape, comprising a measuring tape main assembly. Both outer sides of the main assembly are provided with outer shells, which are symmetrically arranged. Each outer shell has three through holes arranged in a triangular array on its surface. Mounting mechanisms are provided on the sides of the main assembly corresponding to the three through holes. These mounting mechanisms are connected to the main assembly via connectors. The two ends of each mounting mechanism align with the through holes from the inside of the two outer shells. Threaded pins are threaded into the interior of each through hole, and one end of each threaded pin is threadedly connected to the two ends of the three mounting mechanisms.

[0006] In some embodiments, the mounting mechanism includes a bidirectional mounting cylinder mounted on the main body assembly of the measuring tape via a connector. Both ends of the bidirectional mounting cylinder are provided with mounting grooves. A fastening cylinder is provided inside the mounting groove. A gasket is provided at the bottom of the fastening cylinder. A spring is provided at the bottom end of the gasket. The end of the spring away from the gasket is connected to the bottom end of the mounting groove.

[0007] In some embodiments, the top end of the fastening cylinder is provided with a second threaded hole, which is threadedly connected to a second threaded nail.

[0008] In some embodiments, the measuring tape body assembly is provided with limiting mounting rings on both sides, the limiting mounting rings are engaged with the middle of the inner wall of the outer shell, and the top of the limiting mounting rings is provided with a threaded hole.

[0009] In some embodiments, a through hole is provided on the outer casing at a position opposite to the threaded hole, and a threaded pin is installed inside the through hole. The threaded pin passes through the through hole and is threadedly connected to the threaded hole.

[0010] In some embodiments, the threaded pin two is threadedly connected to the fastening cylinder.

[0011] In some embodiments, a perforated fixing piece is provided inside the second through hole, and the second threaded nail is rotatably installed in the hole of the perforated fixing piece in the second through hole.

[0012] This utility model has at least the following beneficial effects: By setting an installation mechanism on the main body of the measuring tape according to the position corresponding to the through hole one on the outer shell, and setting limiting installation rings on both sides of the main body of the measuring tape, and setting the outer shell of the main body of the measuring tape to a completely symmetrical mode, and rotating and connecting threaded nail one inside the through hole one, the two outer shells are respectively clamped onto the limiting installation rings on both sides of the main body of the measuring tape and fixed by threaded nail one. At this time, the end of threaded nail two is close to the fastening cylinder inside both ends of the installation mechanism. By twisting threaded nail two, threaded nail two is connected to the fastening cylinder, thereby achieving a fixing effect. The outer shell of the measuring tape is completely symmetrical. During installation, there is no need to distinguish between the left and right outer shells, and installation can be carried out directly, avoiding errors during the installation process and improving work efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall disassembled structure of this utility model; Figure 2 This is a schematic diagram of one side of the overall structure of this utility model; Figure 3 This is a schematic diagram of the other side of the overall structure of this utility model; Figure 4 This is a schematic diagram of the installation mechanism structure of this utility model; Figure 5 This is a side sectional view of the installation mechanism of this utility model.

[0014] In the diagram: 1. Measuring tape main assembly; 11. Limiting mounting ring; 12. Threaded hole one; 2. Outer shell; 21. Through hole one; 22. Threaded nail one; 3. Through hole two; 31. Threaded nail two; 4. Mounting mechanism; 41. Two-way mounting cylinder; 42. Mounting groove; 43. Fastening cylinder; 431. Threaded hole two; 44. Washer; 45. Spring. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Example 1: Please refer to Figures 1-5This utility model provides a technical solution: a symmetrical measuring tape, including a measuring tape main assembly 1, with outer shells 2 on both sides of the measuring tape main assembly 1. The two outer shells 2 are symmetrical. Each outer shell 2 has three through holes 3 on its surface, which are arranged in a triangular array. Mounting mechanisms 4 are provided on the side of the measuring tape main assembly 1 and at positions corresponding to the three through holes 3. The mounting mechanisms 4 are connected to the measuring tape main assembly 1 through connectors. The two ends of the three mounting mechanisms 4 are aligned with the through holes 3 on the two outer shells 2 from the inside of the two sets of outer shells 2 respectively. Threaded pins 31 are threadedly installed inside the multiple through holes 3, and one end of each threaded pin 31 is threadedly connected to the two ends of the three mounting mechanisms 4.

[0017] The main component 1 of the measuring tape includes a retractable tape, a spring that provides rewinding power, and a metal frame for fixing and supporting components. These components work together to realize the measuring tape's measurement and storage functions. In this measuring tape structure, the main measuring tape assembly 1 is equipped with a mounting mechanism 4, the position of which precisely corresponds to the through hole 21 on the outer shell 2. Simultaneously, limiting mounting rings 11 are installed on both sides of the main measuring tape assembly 1 to position the outer shell 2. The outer shell 2 of the main measuring tape assembly 1 adopts a completely symmetrical design, ensuring that the structure, dimensions, and through hole 21 of both outer shells 2 are completely identical. The through hole 21 of the outer shell 2 is rotatably connected to the threaded pin 22. The two outer shells 2 are respectively secured to the limiting mounting rings 11 on both sides of the main measuring tape assembly 1, and the threaded pin 22 further secures the outer shell 2 to the main measuring tape assembly 1. Once the outer casing 2 is initially fixed, the end of the threaded pin 31 is closely adjacent to the fastening cylinder 43 inside both ends of the mounting mechanism 4. The connection between the threaded pin 31 and the fastening cylinder 43 further enhances the overall fixing effect and prevents loosening during use. The outer casing 2 of the measuring tape is a completely symmetrical design. During installation, there is no need to distinguish between the left and right outer casings 2. The outer casing 2 can be directly selected for assembly, effectively avoiding installation errors caused by confusion in the orientation of the outer casing 2, reducing rework operations, and thus improving the overall installation efficiency. It is especially suitable for batch assembly scenarios and reduces the loss of parts caused by installation errors.

[0018] Example 2: Based on Example 1, as follows Figure 5As shown, the mounting mechanism 4 includes a bidirectional mounting cylinder 41 mounted on the main body assembly 1 of the measuring tape via a connector. Both ends of the bidirectional mounting cylinder 41 have mounting grooves 42. A fastening cylinder 43 is disposed inside the mounting groove 42. A gasket 44 is disposed at the bottom of the fastening cylinder 43, and a spring 45 is disposed at the bottom end of the gasket 44. The end of the spring 45 away from the gasket 44 is connected to the bottom end of the mounting groove 42. A threaded hole 431 is disposed at the top of the fastening cylinder 43, and the threaded hole 431 is threadedly connected to a threaded pin 31. Both sides of the main body assembly 1 of the measuring tape... A limiting mounting ring 11 is provided, which is engaged with the middle of the inner wall of the outer shell 2. A threaded hole 12 is provided at the top of the limiting mounting ring 11. A through hole 21 is provided on the outer shell 2 at the position opposite to the threaded hole 12. A threaded pin 22 is installed inside the through hole 21. The threaded pin 22 passes through the through hole 21 and is threadedly connected to the threaded hole 12. A threaded pin 31 is threadedly connected to the fastening cylinder 43. A perforated fixing piece is provided inside the through hole 3. The threaded pin 31 is rotatably installed in the hole of the perforated fixing piece in the through hole 3.

[0019] The mounting mechanism 4 uses a bidirectional mounting cylinder 41 as its core frame. The bidirectional mounting cylinder 41 has a hollow cylindrical structure, and mounting grooves 42 are symmetrically opened at both ends along the axial direction. The inner diameter of the mounting grooves 42 is precisely matched with the size of the subsequent assembled parts to ensure that the internal components can operate stably. Each mounting slot 42 is equipped with a fastening cylinder 43, a washer 44, and a spring 45 in a specific order: the fastening cylinder 43 is a cylindrical component with an open top, and a threaded hole 431 is provided at the center of its top end face. The inner diameter of the threaded hole 431 is perfectly matched with the outer diameter of the threaded pin 31, ensuring that the two can be tightly engaged through the threads; the washer 44 adopts a ring structure and is tightly fitted on the bottom outer side of the fastening cylinder 43, and the outer diameter of the washer 44 is slightly larger than the opening size at both ends of the bidirectional mounting cylinder 41, while it is completely fitted with the inner wall of the mounting slot 42 to form a limiting structure, which can effectively prevent the fastening cylinder 43 from falling off the opening of the bidirectional mounting cylinder 41 during movement; the spring 45 is located at the bottom of the mounting slot 42, with one end fixedly connected to the inner wall of the bottom end of the mounting slot 42, and the other end in close contact with the side of the washer 44 away from the fastening cylinder 43, always maintaining a natural expansion and contraction state; The opening sizes at both ends of the bidirectional mounting cylinder 41 strictly correspond to the outer diameter of the fastening cylinder 43, ensuring that the fastening cylinder 43 can smoothly extend and retract along the axial direction of the mounting groove 42 while avoiding radial sway. The spring 45 plays a dual role in this structure: firstly, in the assembled state, it pulls the washer 44 through its own elastic tension to enhance the tightness of the engagement between the fastening cylinder 43 and the threaded nail 31, preventing the connection from loosening; secondly, in the disassembled state, when the threaded nail 31 is separated from the fastening cylinder 43, the spring 45 can pull the washer 44 through its rebound contraction to quickly retract the fastening cylinder 43 into the mounting groove 42, preventing the parts from being exposed and damaged or lost. In actual assembly scenarios, after the two outer shells 2 are respectively secured on the limiting mounting rings 11 on both sides of the main assembly 1 of the measuring tape, and are initially fixed by the threaded nail 22, the operator can use a screwdriver or other tools to insert through the pre-set through hole 3 on the surface of the outer shell 2 and twist the threaded nail 31. The middle part of the threaded nail 31 rotates and engages in the hole of the perforated fixing piece inside the through hole 3. The perforated fixing piece is fixedly connected to the inner wall of the outer shell 2, so that the threaded nail 31 always maintains a relatively fixed positional relationship with the outer shell 2 during rotation, and only rotates along its own axis. As the threaded nail 31 rotates clockwise, its end gradually screws into the threaded hole 431 at the top of the fastening cylinder 43. Under the action of the threaded engagement, the fastening cylinder 43 slides outward along the axis of the mounting groove 42 and gradually moves out of the mounting groove 42. At this time, the spring 45 is stretched by the washer 44 and is in an extended state until the threaded nail 31 is completely tightened. The two outer shells 2 are stably connected by the mounting mechanism 4. When it is necessary to disassemble the outer casing 2, simply use a tool to twist the second threaded nail 31 counterclockwise, so that the second threaded nail 31 gradually disengages from the second threaded hole 431. As the two separate, the tension of the spring 45 is released, and it quickly rebounds and contracts, pulling the washer 44 to move towards the bottom of the mounting groove 42, thereby driving the fastening cylinder 43 to retract into the mounting groove 42 and return to its initial position. At this time, the first threaded nail 22 can be released, and the outer casing 2 can be removed from the limiting mounting ring 11 to complete the disassembly operation.

[0020] Based on the above embodiments, the following is the working principle of the above embodiments: When in use, the core components of the symmetrical measuring tape are first clarified: it includes a measuring tape main assembly 1 consisting of a retractable tape, an elastic spring that provides rewinding power, and a metal frame that fixes the support components. The outer shell 2 with a symmetrical structure is assembled on both sides of the measuring tape main assembly 1. The three through holes 3 distributed in a triangular array on the side of the measuring tape main assembly 1 and the surface of the shell 2 are provided with mounting mechanisms 4 fixed by connectors at the corresponding positions. At the same time, the measuring tape main assembly 1 is equipped with limit mounting rings 11 on both sides. The shell 2 is also provided with through holes 21 corresponding to the threaded holes 12 at the top of the limit mounting rings 11. Next, the initial installation and fixing of the outer shell 2 is carried out: the two symmetrical outer shells 2 are respectively inserted from both sides of the main body component 1 of the measuring tape, so that the middle of the inner wall of the outer shell 2 is engaged with the limiting installation ring 11. At this time, the through hole 21 on the outer shell 2 is aligned with the threaded hole 12 of the limiting installation ring 11. Then, the threaded nail 22 is threadedly installed from the inside of the through hole 21, so that the threaded nail 22 passes through the through hole 21 and is threadedly connected to the threaded hole 12, thus completing the initial fixing of the outer shell 2 and the main body component 1 of the measuring tape. Since the outer shell 2 is completely symmetrical, there is no need to distinguish between left and right during installation, and it can be directly assembled. After initial fixation, the outer shell 2 is further stabilized by the installation mechanism 4: The installation mechanism 4 is centered on the bidirectional installation cylinder 41, and the fastening cylinder 43, the gasket 44 and the spring 45 are sequentially assembled in the symmetrically opened installation grooves 42 at both ends. The threaded hole 431 at the top of the fastening cylinder 43 is adapted to the threaded pin 31 in the through hole 3, and the threaded pin 31 is rotatably installed in the hole of the fixed piece with a hole inside the through hole 3, and always maintains a connection with the outer shell 2. The operator uses a tool to twist the threaded nail 31 through the through hole 3 on the surface of the outer shell 2. As the threaded nail 31 rotates clockwise, its end gradually screws into the threaded hole 431 of the fastening cylinder 43. Under the force of the thread engagement, the fastening cylinder 43 slides outward along the axis of the mounting groove 42. The washer 44 moves accordingly and stretches the spring 45 until the threaded nail 31 is fully tightened. The two outer shells 2 are securely connected by the mounting mechanism 4. The elastic tension of the spring 45 can also enhance the tightness of the engagement between the fastening cylinder 43 and the threaded nail 31, preventing loosening during use. When it is necessary to disassemble the outer casing 2, first use a tool to twist the threaded pin 31 counterclockwise to gradually disengage it from the threaded hole 431 of the fastening cylinder 43. The spring 45 is released from its stretched state, rebounds and pulls the washer 44 to move towards the bottom of the mounting groove 42, thereby driving the fastening cylinder 43 to retract into the mounting groove 42. Then, loosen the threaded pin 22, and the outer casing 2 can be removed from the limiting mounting ring 11 to complete the disassembly. The measuring tape in the main assembly 1 can realize the measurement function, the elastic spring provides power for the tape to rewind, and the metal frame is responsible for fixing and supporting each component, which together ensures the normal realization of the measuring tape's measurement and storage functions.

[0021] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A symmetrical tape measure comprising a tape measure body assembly (1) characterised in that: The main body assembly (1) of the measuring tape is provided with a shell (2) on both sides. The two shells (2) are symmetrical. The surface of each shell (2) is provided with three through holes (3). The three through holes (3) are arranged in a triangular array. The side of the main body assembly (1) and the corresponding position of the three through holes (3) are provided with mounting mechanisms (4). The mounting mechanisms (4) are connected to the main body assembly (1) of the measuring tape through connectors. The two ends of the three mounting mechanisms (4) are respectively aligned with the through holes (3) on the shells (2) from the inside of the two sets of shells (2). The inside of each of the through holes (3) is threaded with a threaded pin (31). One end of each of the threaded pins (31) is threadedly connected to the two ends of the three mounting mechanisms (4).

2. The symmetrical tape measure of claim 1, wherein: The mounting mechanism (4) includes a bidirectional mounting cylinder (41) mounted on the main body assembly (1) of the measuring tape via a connector. Both ends of the bidirectional mounting cylinder (41) are provided with mounting grooves (42). A fastening cylinder (43) is provided inside the mounting groove (42). A gasket (44) is provided at the bottom of the fastening cylinder (43). A spring (45) is provided at the bottom end of the gasket (44). The end of the spring (45) away from the gasket (44) is connected to the bottom end of the mounting groove (42).

3. The symmetrical tape measure of claim 2, wherein: The top of the fastening cylinder (43) is provided with a threaded hole two (431), and the threaded hole two (431) is threadedly connected to the threaded nail two (31).

4. The symmetrical tape measure of claim 1, wherein: The measuring tape main assembly (1) has a limiting mounting ring (11) on both sides. The limiting mounting ring (11) is engaged with the middle of the inner wall of the outer shell (2). The top of the limiting mounting ring (11) has a threaded hole (12).

5. The symmetrical tape measure of claim 4, wherein: A through hole (21) is provided on the outer shell (2) at a position opposite to the threaded hole (12). A threaded pin (22) is installed inside the through hole (21). The threaded pin (22) passes through the through hole (21) and is threadedly connected to the threaded hole (12).

6. The symmetrical tape measure of claim 1, wherein: The threaded pin two (31) is threadedly connected to the fastening sleeve (43).

7. The symmetrical tape measure of claim 1, wherein: The through hole 2 (3) is provided with a hole-fixed piece inside, and the threaded nail 2 (31) is rotatably installed in the hole of the through hole 2 (3) with hole-fixed piece.

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