A tape measure with long life

Abstract

This utility model relates to the field of measuring tape technology, specifically a high-life measuring tape, including an upper cover and a lower cover. A rotating plate is movably connected to the top of the upper cover, and a silicone speed reducer is provided at the bottom of the rotating plate. An adjustment groove is provided at the top of the inner cavity of the upper cover, and a locking groove is provided at the bottom of the adjustment groove. The rotating plate is movably connected inside the adjustment groove. This high-life measuring tape, when retracting the measuring tape, rotates the rotating plate at the top of the upper cover, causing the limiting rod to disengage from the locking groove through the adjustment groove. This causes the silicone speed reducer at the top of the inner cavity of the tape to press down and tighten on the top of the measuring tape, increasing the friction between the silicone speed reducer and the top of the measuring tape, reducing the speed of the measuring tape during retraction, and avoiding local plastic deformation or breakage of the tape due to high-speed retraction, which would weaken the retraction force or even prevent it from rebounding, thus improving the service life of the measuring tape.

Description

Technical Field

[0001] This utility model relates to the field of measuring tape technology, specifically a high-lifespan measuring tape. Background Technology

[0002] A measuring tape is a portable measuring tool widely used in daily life and engineering. Its core function is to accurately measure linear dimensions such as length, height, and width.

[0003] Patent document CN208795089U discloses a measuring tape, belonging to the field of daily necessities technology. This measuring tape includes a housing, a measuring tape, a measuring disc loaded by a coil spring, and a disc holder for mounting the disc. The measuring tape is wound around the disc. The housing is an integrated tubular structure, and the disc holder is inserted into the housing and interference-fitted with it. This measuring tape is not easily broken during use, thus extending its service life.

[0004] However, there are certain drawbacks. When the measuring tape is retracted at high speed, the spring rebounds instantaneously, generating a peak torque. If this exceeds the elastic limit of the material, it will cause local plastic deformation or breakage of the spring. Long-term overspeed contraction will reduce the energy storage efficiency of the spring, resulting in a weakening of the retraction force or even failure to rebound, which will affect the service life of the measuring tape. To address this, we propose a high-life measuring tape. Utility Model Content

[0005] One of the technical problems this application aims to solve is that when the measuring tape is retracted at high speed, the spring rebounds instantaneously, generating a peak torque. When this peak torque exceeds the elastic limit of the material, it can cause local plastic deformation or breakage of the spring. Long-term overspeed contraction can reduce the energy storage efficiency of the spring, resulting in a weakening of the retraction force or even the inability to rebound, thus affecting the service life of the measuring tape.

[0006] To solve the above technical problems, this application provides a high-life measuring tape, including an upper cover and a lower cover. A rotating plate is movably connected to the top of the upper cover, and a silicone speed reducer is provided at the bottom of the rotating plate. An adjustment groove is provided at the top of the inner cavity of the upper cover, and a locking groove is provided at the bottom of the adjustment groove. The rotating plate is movably connected inside the adjustment groove.

[0007] In some embodiments, the upper cover and the lower cover are connected by screws, and a fixing shaft is provided at the bottom of the inner cavity of the lower cover, with a scroll sleeved on the outside of the fixing shaft.

[0008] In some embodiments, a groove is provided on the side of the lower cover, and a positioning ring is slidably connected inside the groove. A groove is provided at the connection between the upper cover and the lower cover, and an anti-collision ring is provided on one side of the groove. A measuring tape is movably connected inside the anti-collision ring.

[0009] In some embodiments, the top of the upper cover has a connecting ring protruding therefrom, and the rotating plate is rotatably connected to the top of the upper cover via the connecting ring. The rotating plate and the connecting ring are connected by threads.

[0010] In some embodiments, a connecting rod is provided at the bottom of the rotating plate, and limit rods protrude at both ends of the connecting rod. The silicone speed reducer is fixedly connected to the bottom of the rotating plate through the connecting rod. The connecting rod passes through the top of the reel, and the top of the silicone speed reducer is in contact with the top of the inner cavity of the reel.

[0011] In some embodiments, the limiting rod is engaged inside the slot, and the bottom ends of the adjusting slot are symmetrically provided with inclined surfaces in opposite directions.

[0012] This utility model has at least the following beneficial effects:

[0013] 1. This utility model, when retracting the measuring tape, rotates the rotating plate on the top of the upper cover, causing the limiting rod to disengage from the slot through the adjusting groove. This causes the silicone speed reducer at the top of the inner cavity of the tape roll to press down on the top of the measuring tape, increasing the friction between the silicone speed reducer and the top of the measuring tape. This reduces the speed of the measuring tape during retraction, preventing local plastic deformation or breakage of the tape roll due to high-speed retraction, which could weaken the retraction force or even prevent it from rebounding, thus improving the service life of the measuring tape.

[0014] 2. This utility model changes the pressing effect of the silicone speed reducer on the top of the measuring tape. When the positioning ring slides inside the groove, pressing one end against the side of the measuring tape to fix the length of the measuring tape, it assists the positioning ring in fixing the measuring tape. This prevents the measuring tape from touching the positioning ring during use, which would cause the pressing end of the positioning ring to loosen its restrictive effect on the measuring tape, thus causing the measuring tape to retract and affecting normal measurement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is an exploded view of the overall structure of this utility model;

[0017] Figure 3 This is a schematic cross-sectional view of the present invention.

[0018] Figure 4 This is a partial structural cross-sectional view of the present invention;

[0019] Figure 5 This is a partial structural detail drawing of the present invention;

[0020] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0021] In the diagram: 1. Upper shell cover; 100. Connecting ring; 101. Adjustment groove; 102. Slot; 2. Rotating plate; 200. Connecting rod; 201. Silicone speed reducer; 202. Limiting rod; 3. Roller; 4. Lower shell cover; 400. Slide groove; 401. Fixed shaft; 5. Measuring tape; 6. Anti-collision ring; 7. Positioning ring; 8. Laser emitter. Detailed Implementation

[0022] 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.

[0023] Example 1: Please refer to Figure 1-5 This utility model provides a technical solution: a high-life measuring tape, including an upper cover 1 and a lower cover 4. A rotating plate 2 is movably connected to the top of the upper cover 1, and a silicone speed reducer 201 is provided at the bottom of the rotating plate 2. An adjustment groove 101 is provided at the top of the inner cavity of the upper cover 1, and a slot 102 is provided at the bottom of the adjustment groove 101. The rotating plate 2 is movably connected inside the adjustment groove 101. The silicone speed reducer 201 is used to press against the top of the measuring tape 5 when the tape 5 is retracted, thereby increasing the friction between the tape 5 and the top of the tape 5 to reduce the speed of the tape 5 when it is retracted. The adjustment groove 101 is used to change the distance between the silicone speed reducer 201 and the top of the measuring tape 5 by means of a symmetrical inclined surface provided at the bottom.

[0024] Please see Figure 1-3The upper cover 1 and the lower cover 4 are connected by screws. A fixed shaft 401 is provided at the bottom of the inner cavity of the lower cover 4. A scroll 3 is sleeved on the outside of the fixed shaft 401. A sliding groove 400 is provided on the side of the lower cover 4. A positioning ring 7 is slidably connected inside the sliding groove 400. A groove is provided at the connection part of the upper cover 1 and the lower cover 4, and an anti-collision ring 6 is provided on one side of the groove. A measuring tape 5 is movably connected inside the anti-collision ring 6. The fixed shaft 401 is used to fix the inner end of the scroll 3. The scroll 3 is used to store tensile potential energy. When the measuring tape 5 is pulled out, the spring provided inside the scroll 3 tightens and stores force. When the measuring tape 5 is pulled out, the spring is tightened and stored. When the measuring tape 5 returns, a springback torque is generated. When the length to be measured by the measuring tape 5 needs to be fixed, one end of the positioning ring 7, which is slidably connected inside the slide groove 400, slides towards one end of the measuring tape 5 until one end of the positioning ring 7 presses against the side of the measuring tape 5, thus fixing the measuring tape 5. This facilitates operation when used by a single person. When the positioning ring 7 is pressed against one end of the measuring tape 5, the silicone speed reducer 201 can be pressed against the top of the measuring tape 5 by tightening the rotating plate 2. This prevents the measuring tape from touching the positioning ring 7 during use, thus releasing the restraining effect of the pressing end of the positioning ring 7 on the measuring tape 5, allowing the measuring tape 5 to retract.

[0025] Please see Figure 4-5 The top of the upper cover 1 has a connecting ring 100 protruding. The rotating plate 2 is rotatably connected to the top of the upper cover 1 via the connecting ring 100. The rotating plate 2 and the connecting ring 100 are connected by threads. A connecting rod 200 is provided at the bottom of the rotating plate 2. Limiting rods 202 protrude from both ends of the connecting rod 200. The silicone reducer 201 is fixedly connected to the bottom of the rotating plate 2 via the connecting rod 200. The connecting rod 200 passes through the top of the scroll 3. The top of the silicone reducer 201 fits against the top of the inner cavity of the scroll 3. The limiting rods 202 are engaged inside the slot 102. The bottom of the adjusting slot 101 has symmetrically opened inclined surfaces in opposite directions at both ends. The limiting rods 202 are used to prevent the measuring tape 5 from being pulled outward. The movable silicone reducer 201 detaches from the top of the measuring tape 5, allowing the measuring tape 5 to be pulled out normally for measurement. Since the bottom of the adjusting groove 101 is provided with symmetrical inclined surfaces in opposite directions, when the limiting rod 202 rotates with the top rotating plate 2, the rotating plate 2 drives the limiting rod 202 downward, and at the same time, the limiting rod 202 slides with the inclined surface provided at the bottom of the adjusting groove 101. When the top of the inner cavity of the rotating plate 2 is attached to the top of the connecting ring 100, the rotation stops. At this time, the limiting rod 202 abuts against the bottom of the adjusting groove 101, so that the bottom of the silicone reducer 201 is pressed tightly against the top of the measuring tape 5. The silicone reducer 201 can evenly distribute the pressure on the top of the measuring tape 5, avoiding damage to the measuring tape 5.

[0026] Example 2: Please refer to Figure 6The difference between this embodiment and Embodiment 1 is that this utility model provides a technical solution: a high-life measuring tape, including an upper cover 1, and a laser emitter 8 is provided at the connection between the upper cover 1 and the lower cover 4. The laser emitter 8 and the stretching direction of the measuring tape 5 are parallel to each other. When it is uncertain whether the stretching direction of the measuring tape 5 is parallel, the laser emitter 8 can be turned on. The laser emitter 8 can detect the adhesion between the tape and the object surface in real time, automatically compensate for the measurement deviation caused by suspension or bending, and make the measurement data more accurate during the measurement process.

Claims

1. A high-lifespan measuring tape, comprising an upper cover (1) and a lower cover (4), characterized in that: The top of the upper cover (1) is movably connected to a rotating plate (2), and the bottom of the rotating plate (2) is provided with a silicone speed reducer (201). The top of the inner cavity of the upper cover (1) is provided with an adjustment groove (101), and the bottom of the adjustment groove (101) is provided with a slot (102). The rotating plate (2) is movably connected to the inside of the adjustment groove (101).

2. The high-lifespan measuring tape according to claim 1, characterized in that: The upper cover (1) and the lower cover (4) are connected by screws. A fixed shaft (401) is provided at the bottom of the inner cavity of the lower cover (4), and a roller (3) is sleeved on the outside of the fixed shaft (401).

3. The high-lifespan measuring tape according to claim 2, characterized in that: The lower cover (4) has a sliding groove (400) on its side. A positioning ring (7) is slidably connected inside the sliding groove (400). The connection part between the upper cover (1) and the lower cover (4) has a groove and an anti-collision ring (6) is provided on one side of the groove. A measuring tape (5) is movably connected inside the anti-collision ring (6).

4. The high-lifespan measuring tape according to claim 3, characterized in that: The top of the upper cover (1) has a connecting ring (100) protruding. The rotating plate (2) is rotatably connected to the top of the upper cover (1) through the connecting ring (100). The rotating plate (2) and the connecting ring (100) are connected by threads.

5. A high-lifespan measuring tape according to claim 2, characterized in that: The bottom of the rotating plate (2) is provided with a connecting rod (200), and the two ends of the connecting rod (200) have protruding limit rods (202). The silicone speed reducer (201) is fixedly connected to the bottom of the rotating plate (2) through the connecting rod (200). The connecting rod (200) passes through the top of the scroll (3), and the top of the silicone speed reducer (201) is in contact with the top of the inner cavity of the scroll (3).

6. A high-lifespan measuring tape according to claim 5, characterized in that: The limiting rod (202) is engaged inside the slot (102), and the bottom ends of the adjusting groove (101) are symmetrically provided with inclined surfaces in opposite directions.

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