Sudden stop type deceleration safety recovery measuring tape

Abstract

The embodiment of the invention provides an emergency stop type deceleration safety recovery measuring tape, and relates to the technical field of measuring tools. The device specifically comprises a shell, a tape hub is rotationally arranged in the shell, a tape is wound around the tape hub, a coil spring is arranged in the tape hub, the device further comprises a flywheel plate, a limiting assembly and a reset piece, and the flywheel plate is arranged on the tape hub; the limiting assembly is arranged in the shell. When the tape hub rotates, the flywheel plate is driven to collide with the limiting assembly. Wherein when the tape hub rotates at a first speed to take up the tape, the limiting assembly decelerates the tape hub; when the tape hub rotates at a second speed to take up the tape, the limiting assembly limits the rotation of the tape hub; the first speed is less than the second speed; the reset piece is connected with the limiting assembly so as to relieve rotation limitation of the limiting assembly on the tape hub. The device has the advantages that the speed is reduced when the tape is recycled, and the potential safety hazard of use of the tape is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of measuring tools, and in particular to a deceleration and safety recovery tape measure capable of emergency stop. Background Art

[0002] The steel tape measure is a commonly used measuring tool in daily life and work. It can measure length, locate straight lines, and serve as an auxiliary tool. Its working principle is to measure the object to be measured with a tape marked with scales, and use the elasticity of the spring to automatically retract the tape into the shell.

[0003] During the use of the steel tape measure, when the tape is retracted, the tape is accelerated by the action of the clockwork spring. The tape retracts at a relatively high speed. The thin and sharp tape has a large kinetic energy. When a person approaches the tape, there is a risk of being cut, which poses a great safety hazard during the use of the steel tape measure. Summary of the invention

[0004] The purpose of the present invention includes providing a deceleration and safety recovery tape measure capable of emergency stop, which can reduce the potential safety hazards during the use of the tape measure.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides a deceleration safety recovery tape measure capable of emergency stop, comprising a housing, a tape hub rotatably disposed in the housing, a tape wound outside the tape hub, a coil spring disposed in the tape hub, and further comprising:

[0007] A flywheel plate, which is arranged on the ruler wheel hub;

[0008] The limit assembly is arranged in the housing, and when the ruler wheel hub rotates, the flywheel plate is driven to collide with the limit assembly;

[0009] When the ruler wheel hub rotates at a first speed to retract the measuring tape, the limit assembly decelerates the ruler wheel hub; when the ruler wheel hub rotates at a second speed to retract the measuring tape, the limit assembly limits the rotation of the ruler wheel hub; the first speed is less than the second speed;

[0010] The shell body is also provided with a reset member, which is connected with the limit assembly to release the rotation restriction of the limit assembly on the ruler wheel hub.

[0011] In an optional embodiment, the limit assembly includes a stop member, a deceleration rib and a first elastic member. The stop member is rotatably arranged in the shell, the deceleration rib is arranged on the stop member, and the first elastic member is connected to the stop member. The first elastic member is used to make the stop member always have a tendency to rotate along the rotation direction of the ruler tape hub. When the ruler tape hub drives the flywheel plate to rotate at a first speed, the deceleration rib rotates in the opposite direction of the rotation direction of the ruler tape hub under the collision of the flywheel plate.

[0012] In an optional embodiment, the limiting assembly further includes a locking rib, which is disposed on the return stop member. The limiting rib is disposed in the shell. When the tape hub rotates at the second speed, the locking rib rotates in a direction opposite to the rotation direction of the tape hub after the flywheel plate collides with the deceleration rib, and the side of the locking rib away from the deceleration rib can collide and abut against the flywheel plate when the flywheel plate collides next time, so that the deceleration rib abuts against the limiting rib, thereby limiting the rotation of the tape hub.

[0013] In an optional embodiment, the deceleration rib and the locking rib are arranged at intervals, and a stiffening plate is connected between the deceleration rib and the locking rib.

[0014] In an optional embodiment, the reset member includes a button, which is rotatably arranged in the shell, and the button portion is raised and extends outside the shell, a reset rib is arranged on the stop member, and a reset groove opposite to the reset rib is opened on the button, and there is a gap between the reset rib and the side wall of the reset groove, and the button is pressed toward the shell, the button resists the reset rib and drives the stop member to rotate in the rotation direction of the ruler wheel hub.

[0015] In an optional embodiment, a swivel plate is rotatably arranged in the shell, and a third elastic member connected to the swivel plate is also arranged in the shell, and the third elastic member is used to make the swivel plate press against the side of the locking rib away from the deceleration rib.

[0016] In an optional embodiment, a ruler locking component is rotatably arranged in the shell, and the ruler locking component includes a clamping section and a transmission section, the angle between the clamping section and the transmission section is greater than 90°, the clamping section abuts against the ruler tape, and the transmission section abuts against the button, and a second elastic component abutting against the clamping section is also arranged in the shell, and the second elastic component is used to clamp the clamping section to the ruler tape, and when the button is pressed, the ruler locking component rotates to disengage the clamping section from the ruler tape.

[0017] In an optional embodiment, the side of the deceleration rib and the locking rib away from the reset rib is set to be a plane.

[0018] In an optional embodiment, the side of the deceleration rib and the locking rib close to the reset rib is set as an inclined surface.

[0019] In an optional embodiment, two flywheel plates are arranged opposite to each other on the ruler wheel hub, and the flywheel plate is chamfered on one side away from the rotation direction of the ruler wheel hub, and the chamfer on the flywheel plate is adapted to the inclined surfaces on the deceleration rib and the locking rib.

[0020] The beneficial effects of the deceleration and safe recovery tape measure with emergency stop provided by the embodiment of the present invention include:

[0021] When the ruler wheel hub is rotating at the first speed, the limit assembly decelerates the ruler wheel hub to prevent the ruler wheel hub from accelerating too quickly; when the ruler wheel hub is rotating at the second speed, the limit assembly limits the rotation of the ruler wheel hub, and the ruler wheel hub stops suddenly to prevent the ruler wheel hub from rotating too quickly; and after the ruler wheel hub stops suddenly, the rotation restriction of the ruler wheel hub can be released by the reset member. At this time, the ruler wheel hub starts to accelerate again from zero speed under the action of the winding spring, and repeats the above deceleration or emergency stop process, thereby reducing the recovery speed of the ruler tape, so that the speed of the ruler tape is low and the kinetic energy is small during the overall recovery process, reducing the risk of the ruler tape cutting people's hands, and thus reducing the safety hazards when using the tape measure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 An exploded view of the deceleration and safety recovery tape measure with emergency stop provided in this embodiment;

[0024] Figure 2 A schematic diagram of the internal structure of the deceleration and safety recovery tape measure capable of emergency stop provided in this embodiment;

[0025] Figure 3 An exploded view of a limit assembly in a deceleration safety recovery tape measure capable of emergency stop provided in this embodiment;

[0026] Figure 4 Schematic diagram of the state when the ruler belt wheel hub rotates at the first speed in this embodiment;

[0027] Figure 5 Schematic diagram of the state when the ruler belt wheel hub rotates at the second speed in this embodiment;

[0028] Figure 6 A schematic diagram of the structure of a button in a tape measure with an emergency stop and a safe recovery;

[0029] Figure 7 This is a schematic diagram of the state of the tape of the tape measure with emergency stop and deceleration safety recovery provided in this embodiment when it is pulled out.

[0030] Icons: 100-housing; 200-ruler wheel hub; 210-flywheel plate; 300-ruler tape; 400-coil spring; 500-limiting assembly; 510-return stop; 520-deceleration rib; 530-first elastic member; 540-locking rib; 550-limiting rib; 560-stiffening plate; 570-reset rib; 580-inclined surface; 600-reset member; 610-button; 620-reset groove; 700-locking member; 710-tightening section; 720-transmission section; 730-second elastic member; 800-slewing plate; 810-third elastic member; DETAILED DESCRIPTION

[0031] The steel tape measure is a commonly used measuring tool in daily life and work. When using it, the operator pulls out the tape and uses the tape marked with scales to measure the length of the object to be measured, to locate the straight line, or to use the tape measure as an auxiliary tool. After use, the tape is reeled into the steel tape measure housing through the spring inside the steel tape measure. The steel tape measure has the advantages of being small in size, light in weight, and easy to carry. At the same time, the steel tape measure is easy to operate. When using it, you only need to pull out the tape. After use, the tape can be automatically and quickly reeled into the steel tape measure housing. Therefore, steel tape measures are widely used in daily life, engineering construction and other scenarios.

[0032] The tape of a steel tape measure is generally made of steel strip. When the steel tape measure is recovered after use, the tape is subjected to a large force under the action of the clockwork spring. The recovery speed of the tape tends to accelerate during recovery, which makes the recovery speed of the tape faster. The thin and sharp tape has a large kinetic energy during recovery. At this time, there is a risk of cuts when a person's hand approaches the tape.

[0033] In view of the above problems, the present invention provides a tape measure with an emergency stop and a deceleration safety recovery, which can decelerate the tape measure when the tape measure is wound at a low speed. When the tape measure is wound at a high speed, the tape measure can be stopped urgently to stop winding, and the tape measure that has stopped winding can be wound again after the emergency stop. As a result, the overall winding speed of the tape measure is lower, which improves the current problem that the tape measure is recovered too quickly when in use, and the tape measure is easy to cut the operator's hands, causing a great safety hazard when the tape measure is used. The tape measure has a greater safety and practical value.

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0039] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0040] The following examples are combined with Figure 1-Figure 7 The overall structure, working principle and technical effects of the deceleration and safety recovery tape measure with emergency stop provided by the present invention are introduced in detail.

[0041] Please refer to Figure 1-Figure 7 The present invention provides a deceleration and safety recovery tape measure capable of emergency stop, which is used to decelerate the tape measure 300 during the process of retracting the tape measure 300 after the tape measure is used, so as to reduce the kinetic energy of the tape measure 300 during the recovery process. At the same time, when the speed of the tape measure 300 is too high during the rewinding process of the tape measure 300, the tape measure 300 is stopped urgently.

[0042] In some optional embodiments, the deceleration safety recovery tape measure with emergency stop includes a housing 100, which includes a corresponding upper housing and a lower housing, which are interlocked and detachably connected by screws, and the housing 100 is hollow. A tape hub 200 is rotatably installed in the housing 100 through a rotating shaft, and the tape hub 200 is a hollow cylindrical disk with an upper opening. A coil spring 400 is arranged in the tape hub 200, and the inner end of the coil spring 400 is fixedly connected to the rotating shaft, and the outer end of the coil spring 400 is fixedly connected to the tape hub 200. A tape 300 is wound around the outer side of the tape hub 200, and an opening slit is provided on one side of the housing 100 for the tape 300 to extend out.

[0043] Please refer to Figure 1-Figure 7 When the tape 300 is pulled out from the tape measure, the tape 300 drives the tape hub 200 to rotate. At this time, the tape hub 200 rotates counterclockwise, and the coil spring 400 inside the tape hub 200 is tightened. The coil spring 400 generates an elastic force on the tape hub 200, so that the tape hub 200 has a tendency to rotate. When the tape 300 is released, the tape hub 200 rotates under the action of the coil spring 400, and the tape 300 is recovered into the housing 100 and rolled onto the tape hub 200. At this time, the tape hub 200 rotates clockwise when rotating.

[0044] Based on this, combined Figure 1-Figure 7 The rotation direction of the middle belt wheel hub 200 of the present invention is Figure 1-Figure 7 In the clockwise direction, the direction away from the ruler wheel hub 200 is Figure 1-Figure 7 Counterclockwise direction.

[0045] Please refer to Figure 1 and Figure 2The deceleration and safety retractable tape measure with emergency stop also includes a flywheel plate 210 and a limit assembly 500. The flywheel plate 210 is arranged on one side of the tape hub 200 and protrudes from the tape hub 200. The limit assembly 500 is arranged on one side of the housing 100 near the flywheel plate 210. The limit assembly 500 is located on one side of the tape hub 200. When the tape hub 200 rotates and rewinds the tape 300, the flywheel plate 210 rotates with the tape hub 200 and periodically collides with the limit assembly 500, that is, the flywheel plate 210 collides with the limit assembly 500 once for each rotation of the tape hub 200. Further, when the tape hub 200 rotates at a first speed to rewind the tape 300, the limit assembly 500 decelerates the flywheel plate 210 by collision, thereby decelerating the tape hub 200. When the tape hub 200 rotates at the second speed to retract the tape 300, the limit assembly 500 limits the tape hub 200, restricts the rotation of the tape hub 200, and thus stops the tape hub 200. The second speed is greater than the first speed. Further, a reset member 600 is provided on the housing 100, and the reset member 600 is connected to the limit assembly 500. When the limit assembly 500 is in a state of restricting the rotation of the tape hub 200, the reset member 600 is used to release the limit assembly 500 from restricting the rotation of the tape hub 200.

[0046] After the tape measure is used, when the tape 300 is automatically recovered under the action of the coil spring 400, the coil spring 400 drives the tape hub 200 to rotate at an accelerated speed, and the tape 300 performs an accelerated motion. When the tape hub 200 is at the first speed, that is, when the tape hub 200 is in a low-speed rotation state, the limit assembly 500 decelerates the tape hub 200 to prevent the tape hub 200 from accelerating too fast. When the tape hub 200 is at the second speed, that is, when the tape hub 200 is in a high-speed rotation state, the limit assembly 500 limits the rotation of the tape hub 200, and the tape hub 200 stops suddenly to prevent the tape hub 200 from rotating too fast. After the tape hub 200 stops suddenly, the rotation restriction of the tape hub 200 can be released by the reset member 600. At this time, the tape hub 200 starts to rotate at an accelerated speed again from zero under the action of the coil spring 400, and repeats the above deceleration or emergency stop process. As a result, the rotation speed of the tape hub 200 is always at a relatively low speed, so that the tape 300 has a low speed and small kinetic energy during the overall recovery process, reducing the risk of the tape 300 cutting people's hands, thereby reducing the safety hazards when using the tape measure.

[0047] Please refer to Figure 3 and Figure 4In some optional embodiments, the limit assembly 500 includes a stop member 510, a deceleration rib 520 and a first elastic member 530. The stop member 510 is rotatably disposed on the inner wall of the housing 100 via a stop shaft. In the present embodiment, the stop member 510 is a hollow cylindrical tube. In other embodiments, the stop member 510 may also be in other shapes. As long as the stop member 510 can rotate in the housing 100 and does not interfere with other components, the specific shape of the stop member 510 is not limited herein. The deceleration rib 520 is fixedly disposed on the stop member 510 and protrudes from the side of the stop member 510. The first elastic member 530 is connected to the stop member 510. When the ruler wheel hub 200 drives the flywheel plate 210 to rotate at a first speed, the flywheel plate 210 collides with the deceleration rib 520 during the rotation process. After the collision, the deceleration rib 520 deviates from the rotation direction of the ruler wheel hub 200 ( Figure 4 The first elastic member 530 is used to ensure that the return stop member 510 always has a rotation direction (in the counterclockwise direction) along the ruler wheel hub 200. Figure 4 In the initial position, the deceleration rib 520 on the return stop 510 extends toward the tape hub 200 to within the movement radius of the flywheel plate 210.

[0048] In some optional embodiments, the first elastic member 530 is a torsion spring, which is located in the return stop member 510, one end of the torsion spring abuts against the return stop shaft fixed to the housing 100, and the other end of the torsion spring abuts against the return stop member 510. In other optional embodiments, the first elastic member 530 may also be an elastic structure such as a spring or elastic rubber.

[0049] When the ruler tape hub 200 rotates at the first speed, the flywheel plate 210 on the ruler tape hub 200 collides with the deceleration rib 520. During the collision, part of the kinetic energy of the ruler tape hub 200 is transferred to the deceleration rib 520. At the same time, part of the kinetic energy of the ruler tape hub 200 is converted into heat energy and used to overcome the friction between the ruler tape hub 200 and the deceleration rib 520 during the collision, thereby reducing the kinetic energy of the ruler tape hub 200 and decelerating the ruler tape hub 200. After the deceleration rib 520 rotates due to the collision, the first elastic member 530 drives the return stop member 510 to rotate, so that the deceleration rib 520 is reset. After the ruler tape hub 200 rotates one circle, the flywheel plate 210 collides with the deceleration rib 520 again, thereby achieving the deceleration effect on the ruler tape hub 200.

[0050] Please refer to Figure 3-Figure 5In some optional embodiments, the limit assembly 500 further includes a locking rib 540, which is disposed on the return stop member 510 and spaced apart from the deceleration rib 520. A limit rib 550 is disposed on the housing 100, and the limit rib 550 is located in front of the return stop member 510 in the rotation direction (clockwise) of the ruler wheel hub 200. When the ruler wheel hub 200 rotates, the flywheel plate 210 collides with the deceleration rib 520 and causes the deceleration rib 520 to rotate toward the limit rib 550. When the ruler wheel hub 200 rotates at the second speed, the flywheel plate 210 hits the deceleration rib 520, so that the return stop member 510 drives the locking rib 540 to rotate toward the limiting rib 550. Since the second speed is greater than the first speed, the rotation angle of the return stop member 510 is larger during the collision. When the flywheel plate 210 rotates to be opposite to the return stop member 510 for the next time, the return stop member 510 cannot be reset in time under the action of the first elastic member 530. At this time, the flywheel plate 210 collides with the side of the locking rib 540 away from the deceleration rib 520, and continues to drive the return stop member 510 to rotate toward the limiting rib 550. Until the deceleration rib 520 abuts against the limiting rib 550 and the flywheel plate 210 abuts against the locking rib 540, the limiting rib 550, the deceleration rib 520 and the locking rib 540 work together to limit the rotation of the ruler tape hub 200, hinder the rotation of the ruler tape hub 200, and achieve the emergency stop effect of the ruler tape hub 200.

[0051] It should be clear that the stopper 510 rotates when the deceleration rib 520 is hit by the flywheel plate 210, and the stopper 510 is reset under the action of the first elastic member 530 after the rotation, and the reset of the stopper 510 requires a certain amount of time. At this time, a flywheel plate 210 is provided on the ruler wheel hub 200, and when the time required for the ruler wheel hub 200 to rotate one circle is greater than the reset time of the stopper 510, the rotation speed of the ruler wheel hub 200 is the first speed. When the time required for the ruler wheel hub 200 to rotate one circle is less than the reset time of the stopper 510, the rotation speed of the ruler wheel hub 200 is the second speed.

[0052] When the ruler wheel hub 200 rotates at the first speed, the return stop 510 moves at a small angle after collision, and the return stop 510 resets in a short time. The return stop 510 can be reset within one rotation of the ruler wheel hub 200, so that the flywheel plate 210 collides with the deceleration rib 520 when the ruler wheel hub 200 rotates. When the ruler wheel hub 200 rotates at the second speed, the return stop 510 moves at a large angle after collision, and the return stop 510 resets in a long time. At this time, the ruler wheel hub 200 rotates at a faster speed. When the ruler wheel hub 200 rotates for one rotation, the return stop 510 has not yet driven the deceleration rib 520 to reset in time, resulting in the flywheel plate 210 rotating for one rotation and passing the return stop 510 again. It will not collide with the deceleration rib 520, but will collide with the locking rib 540, and then the deceleration rib 520 will be held against the limit rib 550, so as to achieve an emergency stop of the ruler wheel hub 200.

[0053] Please refer to Figure 3 Furthermore, the deceleration rib 520 and the locking rib 540 will be subjected to a large impact force when hit by the flywheel plate 210. In order to improve the overall structural strength of the limiting assembly 500 and extend the service life of the limiting assembly 500, in some optional embodiments, a stiffening plate 560 is connected between the deceleration rib 520 and the locking rib 540 to improve the structural strength between the deceleration rib 520 and the locking rib 540.

[0054] Please refer to Figure 3-Figure 5 Furthermore, the side of the deceleration rib 520 and the locking rib 540 facing the rotation direction of the tape hub 200 is set to be a plane, that is, when the tape hub 200 rotates, the side of the flywheel plate 210 that collides with the deceleration rib 520 and the locking rib 540 is a plane. This makes the effective collision range of the flywheel plate 210 and the deceleration rib 520 and the locking rib 540 large.

[0055] Please refer to Figure 4-Figure 6 Furthermore, at least one flywheel plate 210 is provided on the ruler tape hub 200. In some optional embodiments, two flywheel plates 210 are relatively provided on the ruler tape hub 200. At this time, the two flywheel plates 210 are located on the same diameter of the ruler tape hub 200. Therefore, when the ruler tape hub 200 rotates one circle, the deceleration rib 520 collides with the two flywheel plates 210 once, thereby further improving the effect of reducing the kinetic energy of the ruler tape hub 200, and further improving the deceleration effect on the ruler tape 300.

[0056] It should be clear that when two flywheel plates 210 are provided on the ruler tape hub 200, when the time required for the ruler tape hub 200 to rotate half a circle is greater than the reset time of the return stop 510, the rotation speed of the ruler tape hub 200 is the first speed. When the time required for the ruler tape hub 200 to rotate half a circle is less than the reset time of the return stop 510, the rotation speed of the ruler tape hub 200 is the second speed.

[0057] Please refer to Figure 1-Figure 7The reset member 600 includes a button 610, which is rotatably mounted in the housing 100. The button 610 has a portion of protrusions, and the protrusions of the button 610 penetrate the housing 100 and extend outside the housing 100. A reset rib 570 is provided on the stop member 510, and the reset rib 570 protrudes from the edge of the stop member 510. The reset rib 570 is staggered with the deceleration rib 520 and the locking rib 540 in the direction along the thickness of the housing 100. A reset groove 620 is provided on the button 610 opposite to the reset rib 570. The reset rib 570 is located in the reset groove 620 and there is a gap between the reset rib 570 and the side wall of the reset groove 620. When the limit assembly 500 restricts the rotation of the tape hub 200, the button 610 is pressed toward the housing 100, so that the button 610 first rotates until the side wall of the reset groove 620 abuts against the reset rib 570, and then drives the return stop member 510 to rotate in the rotation direction (clockwise) of the tape hub 200. Then, the deceleration rib 520 rotates to disengage from the flywheel plate 210, so that the tape hub 200 accelerates and rotates again from zero speed. This achieves an emergency stop state that is easy to contact the tape hub 200, so that the tape hub 200 rotates again and the tape 300 is wound up.

[0058] Please refer to Figure 1 and Figure 2 In order to fix the pulled-out tape 300 during the use of the tape measure, in some optional embodiments, a locking member 700 is rotatably arranged in the housing 100, and the locking member 700 includes a pressing section 710 and a transmission section 720. The rotation axis of the locking member 700 is located at the connection between the pressing section 710 and the transmission section 720, and the angle between the pressing section 710 and the transmission section 720 is greater than 90°. The end of the pressing section 710 presses against the tape 300, and the end of the transmission section 720 presses against the side of the button 610 facing the housing 100. A second elastic member 730 is also arranged in the housing 100, and the second elastic member 730 is located between the housing 100 and the pressing section 710. The second elastic member 730 is used to press the pressing section 710 against the tape 300, thereby fixing the tape 300. When the tape 300 is to be rolled up, the button 610 is pressed, and the button 610 drives the locking member 700 to rotate, so that the abutting section 710 is separated from the tape 300, and the tape 300 can be automatically rolled up under the action of the coil spring 400. When the tape 300 needs to be pulled out further, the button 610 is pressed and the tape 300 is pulled out further. In this embodiment, the second elastic member 730 is a spring sheet, and in other embodiments, the second elastic member 730 can also be an elastic structure such as a torsion spring, a spring, or an elastic rubber.

[0059] It should be clear that, since there is a certain gap between the reset rib 570 on the return stop 510 and the side wall of the reset groove 620 on the button 610, when the button 610 is lightly pressed, the button 610 drives the ruler lock 700 to rotate and release the fixation of the ruler tape 300, but at this time the reset rib 570 is still located in the reset groove 620 and is not in contact with the button 610. When the button 610 is lightly pressed, the ruler tape 300 is released and automatically reeled, which does not affect the return stop 510 to decelerate or stop the ruler tape 300.

[0060] The limit assembly 500 is provided to decelerate the rotation of the ruler wheel hub 200, thereby controlling the rewinding speed of the ruler tape 300. However, when the ruler tape 300 is pulled out for use, the ruler wheel hub 200 will also collide with the deceleration rib 520, so that there is a strong sense of frustration when the ruler tape 300 is pulled out, and it is difficult to pull out the ruler tape 300.

[0061] Based on this, please refer to Figure 3 and Figure 7 In some optional embodiments, the side of the deceleration rib 520 and the locking rib 540 away from the rotation direction of the tape hub 200 is set as an inclined surface 580, and the side of the flywheel plate 210 away from the rotation direction of the tape hub 200 is chamfered, and the chamfer of the flywheel plate 210 is adapted to the inclined surface 580 on the deceleration rib 520 and the locking rib 540. Therefore, when the tape 300 is pulled out (the tape hub 200 rotates counterclockwise), the chamfer on the flywheel plate 210 collides with the inclined surface 580 on the deceleration rib 520, so that the effective contact area between the flywheel plate 210 and the deceleration rib 520 is small, and the contact time between the flywheel plate 210 and the deceleration rib 520 is short. It is convenient to pull the tape 300 out of the housing 100, and reduce the sense of frustration when the tape 300 is pulled out.

[0062] Please refer to Figure 7 In some optional embodiments, a rotating plate 800 is also rotatably disposed in the housing 100, and a third elastic member 810 is disposed in the housing 100. The third elastic member 810 makes the end of the rotating plate 800 abut against the side of the locking rib 540 away from the deceleration rib 520. The rotating plate 800 is used to lock the initial angle of the return stop member 510, and when the tape 300 is pulled out (the tape hub 200 rotates counterclockwise), the rotating plate 800 can quickly reset the return stop member 510. In this embodiment, the third elastic member 810 is a spring sheet. In other embodiments, the third elastic member 810 can also be an elastic structure such as a torsion spring, a spring, or an elastic rubber.

[0063] The working principle of the deceleration safety recovery tape measure capable of emergency stop of the present invention is as follows: when the tape hub 200 rotates at a first speed to retract the tape 300, the flywheel plate 210 on the tape hub 200 collides with the deceleration rib 520, the kinetic energy of the tape hub 200 is reduced, and the tape 300 is decelerated; when the tape hub 200 retracts the tape 300 at a second speed, after the flywheel plate 210 on the tape hub 200 collides with the deceleration rib 520, the flywheel plate 210 rotates one circle and then collides with the locking rib 540, the deceleration rib 520 is held against the limit rib 550, the return stop 510 is stuck, and the tape hub 200 is stopped urgently. Thus, the tape 300 is decelerated at low speed and stopped urgently at high speed, the recovery speed of the tape 300 is reduced, the potential safety hazard when the tape 300 is recovered is reduced, and the safety of the tape 300 when it is used is improved.

[0064] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A tape measure with an emergency stop and a deceleration safety recovery, comprising a housing, a tape hub rotatably arranged in the housing, a tape tape wound outside the tape hub, a coil spring arranged in the tape hub, characterized in that: Also includes: A flywheel plate, the flywheel plate being arranged on the ruler wheel hub; A limit assembly, wherein the limit assembly is disposed in the housing, and when the ruler wheel hub rotates, the flywheel plate is driven to collide with the limit assembly; Wherein, when the ruler wheel hub rotates at a first speed to reel in the ruler tape, the limit assembly decelerates the ruler wheel hub; when the ruler wheel hub rotates at a second speed to reel in the ruler tape, the limit assembly limits the rotation of the ruler wheel hub; the first speed is less than the second speed; The shell is also provided with a reset member, which is connected to the limit assembly to release the rotation restriction of the limit assembly on the ruler wheel hub.

2. The deceleration and safety recovery tape measure capable of emergency stop according to claim 1 is characterized in that: The limit assembly includes a stop member, a deceleration rib and a first elastic member. The stop member is rotatably arranged in the shell, the deceleration rib is arranged on the stop member, the first elastic member is connected to the stop member, and the first elastic member is used to make the stop member always have a tendency to rotate along the rotation direction of the ruler tape hub. When the ruler tape hub drives the flywheel plate to rotate at the first speed, the deceleration rib rotates in the opposite direction to the rotation direction of the ruler tape hub under the collision of the flywheel plate.

3. The deceleration and safety recovery tape measure capable of emergency stop according to claim 2 is characterized in that: The limiting assembly also includes a locking rib, which is arranged on the return stop member. The shell is provided with a limiting rib. When the ruler tape hub rotates at the second speed, the locking rib rotates in the opposite direction to the rotation direction of the ruler tape hub after the flywheel plate collides with the deceleration rib, and the side of the locking rib away from the deceleration rib can collide with and abut against the flywheel plate when the flywheel plate collides next time, so that the deceleration rib abuts against the limiting rib, thereby limiting the rotation of the ruler tape hub.

4. The deceleration and safety recovery tape measure capable of emergency stop according to claim 3 is characterized in that: The deceleration rib and the locking rib are arranged at intervals, and a stiffening plate is connected between the deceleration rib and the locking rib.

5. The deceleration and safety recovery tape measure capable of emergency stop according to claim 3 is characterized in that: The reset member includes a button, which is rotatably arranged in the shell, and the button part is protruding and extends outside the shell, the return stop member is provided with a reset rib, and the button is provided with a reset groove opposite to the reset rib, and there is a gap between the reset rib and the side wall of the reset groove, and the button is pressed toward the shell, the button resists the reset rib and drives the return stop member to rotate in the rotation direction of the ruler wheel hub.

6. The deceleration and safety recovery tape measure capable of emergency stop according to claim 5, characterized in that: A ruler locking component is rotatably arranged in the shell, and the ruler locking component includes a clamping section and a transmission section, the clamping section abuts against the ruler tape, and the transmission section abuts against the button. A second elastic component abutting against the clamping section is also arranged in the shell, and the second elastic component is used to clamp the clamping section against the ruler tape. When the button is pressed, the ruler locking component rotates to disengage the clamping section from the ruler tape.

7. The deceleration and safety recovery tape measure capable of emergency stop according to claim 5, characterized in that: The side of the deceleration rib and the locking rib away from the reset rib is set as a plane.

8. The deceleration and safety recovery tape measure capable of emergency stop according to claim 3, characterized in that: A revolving plate is rotatably arranged in the shell, and a third elastic member connected to the revolving plate is also arranged in the shell, and the third elastic member is used to make the revolving plate press against the side of the locking rib away from the deceleration rib.

9. The deceleration and safety recovery tape measure capable of emergency stop according to claim 5, characterized in that: The deceleration rib and the locking rib are arranged on a side close to the reset rib as an inclined surface.

10. The deceleration and safety recovery tape measure capable of emergency stop according to claim 9, characterized in that: At least one flywheel plate is arranged opposite to the ruler wheel hub, and the flywheel plate is chamfered on one side away from the rotation direction of the ruler wheel hub, and the chamfer on the flywheel plate is adapted to the inclined surfaces on the deceleration rib and the locking rib.

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