WO2022068284A1 - 一种带有阻尼结构的卷尺 - Google Patents

一种带有阻尼结构的卷尺 Download PDF

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Publication number
WO2022068284A1
WO2022068284A1 PCT/CN2021/102158 CN2021102158W WO2022068284A1 WO 2022068284 A1 WO2022068284 A1 WO 2022068284A1 CN 2021102158 W CN2021102158 W CN 2021102158W WO 2022068284 A1 WO2022068284 A1 WO 2022068284A1
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WO
WIPO (PCT)
Prior art keywords
tape measure
damping structure
runner
shell
tape
Prior art date
Application number
PCT/CN2021/102158
Other languages
English (en)
French (fr)
Inventor
朱陈波
陈悦
林泽舜
梅矩魏
Original Assignee
浙江煜焰工业设计有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 浙江煜焰工业设计有限公司 filed Critical 浙江煜焰工业设计有限公司
Publication of WO2022068284A1 publication Critical patent/WO2022068284A1/zh

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/10—Measuring tapes
    • G01B3/1005—Means for controlling winding or unwinding of tapes
    • G01B3/1007—Means for locking
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/10—Measuring tapes
    • G01B3/1041—Measuring tapes characterised by casings
    • G01B3/1046—Details of external structure thereof, e.g. shapes for ensuring firmer hold
    • G01B3/1048—Integrated means for affixing or holding

Definitions

  • the invention relates to the technical field of measuring devices, in particular to a tape measure with a damping structure.
  • the tape measure is a commonly used tool in daily life.
  • the main types are steel tape measure and fiber tape measure. What you often see is the steel tape measure, which is widely used in woodworking, construction, decoration and other fields.
  • the existing steel tape measure generally includes a ruler shell, a mainspring spring, a rotating wheel and a ruler belt arranged inside the ruler case, and a ruler hook arranged on the ruler belt; Then pull out the tape measure to measure the piece to be tested; after the measurement is completed, release the tape measure, the spring in the tape measure will drive the wheel to rotate to rewind the tape measure tape, in order to ensure that the longer tape measure can be completely
  • the tension of the spring is generally larger, so the retraction speed of the tape measure is faster.
  • the present invention provides a tape measure with a damping structure.
  • the damping structure inside the tape measure will counteract the runner under the action of friction.
  • the rotating speed of the tape is limited, thereby reducing the speed at which the tape is retracted into the tape measure housing, reducing the possibility of scratching the user when the tape is retracted.
  • a tape measure with a damping structure comprising a ruler case composed of an A half-shell and a B half-shell, and the inside of the ruler case is provided with a spring, a runner and a ruler;
  • the B The middle part of the half shell is fixed with a mandrel;
  • the runner is sleeved on the mandrel and can rotate around the mandrel;
  • the clockwork spring is arranged on the inner side of the runner, and its inner end is connected with the mandrel, and its outer end is connected with the mandrel.
  • the runner is connected; the ruler belt is wound on the outside of the runner; the inner end of the ruler belt is connected with the runner, and the outer end is provided with a ruler hook for cooperating with the ruler shell to form a limit; the runner is provided with A circular damping groove with the center of the circle located at the center of its rotation, and a damping structure is arranged in the circular damping groove; the damping structure comprises a long strip-shaped connecting piece connected with the runner, which can be rotated by the runner belt, and a pair of connecting pieces which are hinged to the long strip respectively.
  • the deceleration plates at both ends of the connecting piece are located on the side opposite to the rotation direction of the elongated connecting piece when the tape is recovered, and are in the shape of bending toward the center of rotation of the elongated connecting piece.
  • the tape measure with a damping structure of the present application has a novel design, is simple and convenient to operate, and has strong applicability; when the tape is recovered, the shrinking force of the spring spring drives the runner to rotate to retract the tape.
  • the damping structure is driven by the runner and rotates synchronously with the runner.
  • the deceleration plate is thrown out due to the centrifugal force, and contacts with the groove wall of the circular damping groove to generate frictional resistance, which limits the rotation speed of the runner, making the ruler
  • the speed at which the tape is retracted into the tape measure shell is reduced, the possibility of scratching the user when the tape is retracted is reduced, the damage rate of the internal structure of the tape measure is also reduced, and the service life of the tape measure is improved.
  • the speed reducer includes a speed reducer body, and the outer end of the speed reducer body is provided with a friction plate for increasing the friction coefficient between the speed reducer and the groove wall of the circular damping groove.
  • the friction plate is made of rubber. The friction coefficient between the friction plate made of rubber and the groove wall of the circular damping groove is large, which ensures that the speed reduction plate can easily rely on friction to limit the speed of the runner when the tape measure retracts; in addition, the rubber material is elastic, It has good wear resistance, is not easy to be damaged, and ensures the service life of the deceleration plate, and the rubber is cheap, which is beneficial to control the manufacturing cost.
  • the main body of the reduction plate is detachably connected to the friction plate. Therefore, when the tape measure is used for a long time, it is convenient to remove the friction plate and replace it with a new friction plate.
  • the main body of the deceleration plate is provided with a clamping groove, and correspondingly, the friction plate is provided with a clamping joint, and the main body of the deceleration plate and the friction plate are connected through the cooperation of the clamping groove and the clamping joint. At this time, it is easy to implement, easy to assemble and disassemble, and the limit structure between the clip joint and the clip groove can also ensure the firmness of the connection between the speed reduction plate main body and the friction plate.
  • the main body of the speed reducer has a shape with a small hinge end and a large working end.
  • the deceleration plate is thrown out due to the centrifugal force, and then contacts with the groove wall of the circular damping groove to generate frictional resistance; and the centrifugal force is related to the mass of the object and the surrounding radius, and the working end is designed to be Larger, it is more convenient for the speed reducer to be thrown out under the action of centrifugal force.
  • a braking device is provided on the side of the ruler case.
  • the design of the braking device enables the tape to be positioned firmly after the tape is pulled out of the housing.
  • the braking device includes a connecting rod, the lower part of the connecting rod is provided with a braking block, the lower end of the braking block is provided with a braking contact part; the middle part of the connecting rod is provided with a braking button, The outer side of the brake button is exposed outside the ruler case.
  • the braking device adopts the above structure, which is convenient to use and operate, and easy to implement.
  • the center of the A half shell is provided with a threaded mounting hole for mounting the waist buckle.
  • the waist buckle can be fixed on the A half shell only by using screws and threaded mounting holes; after installing the waist buckle on the ruler shell, when the user does not need to use the tape measure, the waist buckle can be used. Attach the tape measure to your belt for easy portability.
  • a hanging ring is provided on the ruler shell for installing a hanging rope.
  • a hanging rope When installing, only need to pass the lanyard through the hanging ring to realize the connection between the lanyard and the ruler shell; after the lanyard is installed, it is convenient to hang the tape measure, easy to carry, and not easy to lose.
  • Fig. 1 is the structural representation that the tape measure with damping structure of the present invention removes the B half-shell;
  • Fig. 2 is the structural representation of B half-shell in the present invention
  • Fig. 3 is the structural representation of the damping structure in the present invention.
  • Fig. 4 is the structural representation of the friction plate in the present invention.
  • FIG. 5 is a schematic structural diagram of the main body of the deceleration plate in the present invention.
  • Fig. 6 is the structural representation of the runner in the present invention.
  • Fig. 7 is the structural representation of the braking device in the present invention.
  • FIG. 8 is a schematic structural diagram of a specific embodiment of a tape measure with a damping structure of the present invention.
  • the markings in the attached drawings are: 1-foot shell, 11-A half shell, 111-threaded mounting hole, 12-B half shell, 13-hanging ring; 2-spring spring; 3-runner, 31-circle Damping groove, 32-post; 4-foot belt; 5-braking device, 51-connecting rod, 52-braking block, 521-braking contact part, 53-braking button; 6-foot hook; 7- Mandrel; 8- Damping structure, 81- Long strip connecting piece, 82- Speed reducing plate, 821- Speed reducing plate body, 8211- Snap groove, 822- Friction plate, 8221- Card joint; 9- Waist buckle.
  • the tape measure with damping structure of the present invention includes an A half-shell 11 and a B half-shell 12 (the A half-shell 11 and the B half-shell 12 can be made of ABS; Good toughness and impact resistance make the tape measure of the present invention resistant to smashing and durable, not suitable for breaking, and has a relatively long service life, and the tape measure is made of ABS material, which reduces the structural weight, reduces the consumption of raw materials, and saves production costs)
  • the formed ruler shell 1 (the A half shell 11 and the B half shell are correspondingly provided with threaded holes for fixing.
  • the screws are passed through the threaded holes on the A half shell 11 and the B half shell in turn to realize the The connection between the A half shell 11 and the B half shell 12 is fixed, and the operation is simple). It has a micro U-shaped surface. At this time, it has high hardness and good toughness, is strong and wear-resistant, and is not easy to rust; the ruler belt 4 can be made of acrylic paint, and the surface is matt coated, so that the ruler belt 4 can be bent at will and is not easy to break; the ruler belt 4 A scale is set on at least one side, and scales with different measurement units can be set on the front and back respectively); the middle part of the B half-shell 12 is fixedly provided with a mandrel 7 (the mandrel 7 can be made of zinc alloy steel); the runner 3 is set in a On the mandrel 7, it can be rotated around the mandrel 7; the spring 2 is arranged on the inner side of the runner 3, its inner end is connected with the mandrel 7, and its
  • the deceleration plate 82 includes a deceleration plate main body 821 .
  • the outer end of the deceleration plate body 821 is provided with a friction plate 822 for increasing the friction coefficient between the deceleration plate 82 and the groove wall of the circular damping groove 31 .
  • the friction plate 822 is made of rubber.
  • the friction coefficient between the friction plate 822 made of rubber and the groove wall of the circular damping groove 31 is relatively large (the runner 3 can be made of ABS material, and the friction coefficient between the rubber material and the ABS material is relatively large), thus ensuring that the The time-lapse speed reduction plate 82 can easily limit the rotational speed of the runner 3 by means of friction; in addition, the rubber material is elastic, has good wear resistance, is not easy to be damaged, and ensures the service life of the speed reduction plate 82, and the rubber is cheap , which is beneficial to control the manufacturing cost.
  • the reduction plate main body 821 is detachably connected to the friction plate 822 . Therefore, when the tape measure is used for a long time, it is convenient to remove the friction plate 822 and replace it with a new friction plate 822 to ensure that the deceleration plate 82 and the groove wall of the circular damping groove 31 always have a high friction coefficient.
  • the speed reduction plate main body 821 is provided with a snap groove 8211, correspondingly, the friction plate 822 is provided with a snap joint 8221. Cooperate to achieve connection. At this time, the installation is convenient, and the limiting structure between the clip joint 8221 and the clip slot 8211 can also ensure the firmness of the connection between the speed reduction plate main body 821 and the friction plate 822 .
  • the speed reduction plate main body 821 is in the shape of a small hinge end and a large working end.
  • the deceleration plate 82 is thrown out due to the centrifugal force, and then contacts with the groove wall of the circular damping groove 31 to generate frictional resistance; and the centrifugal force is related to the mass of the object and the surrounding radius. It is designed to be larger, which is more convenient for the deceleration plate 82 to be thrown out under the action of centrifugal force.
  • a braking device 5 is provided on the side of the ruler case 1 .
  • the design of the braking device 5 makes it possible to achieve the effect of stable positioning after the ruler belt 4 is pulled out of the ruler case 1 .
  • the braking device 5 includes a connecting rod 51 , a braking block 52 is provided at the lower part of the connecting rod 51 , and a braking contact portion 521 is provided at the lower end of the braking block 52 ; the A brake button 53 is provided in the middle of the connecting rod 51 , and the outer side of the brake button 53 is exposed outside the ruler housing 1 .
  • the braking device 5 adopts the above structure, which is convenient to use and operate, and easy to implement.
  • the brake contact portion 521 presses the tape 4 to achieve the purpose of the brake tape 4; Pressing, the tape 4 returns to the state of automatic retraction or being pulled out.
  • a threaded mounting hole 111 is provided in the center of the half shell A 11 for mounting the waist buckle 9 .
  • the waist buckle 9 can be fixed on the A half shell 11 only by matching the screw with the threaded mounting hole 111; after installing the waist buckle 9 on the ruler shell 1, when the user does not need to use the tape measure, The tape measure can be attached to the belt through the waist buckle 9, which is convenient to carry.
  • the ruler shell 1 is provided with a hanging ring 13 for installing a hanging rope.
  • a hanging ring 13 for installing a hanging rope.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Tape Measures (AREA)

Abstract

一种带有阻尼结构的卷尺，包括由A半壳（11）和B半壳（12）构成的尺壳（1），尺壳（1）内设有发条弹簧（2）、转轮（3）和尺带（4）；B半壳（12）中部设有芯轴（7），转轮（3）套装于芯轴（7）上；发条弹簧（2）设于转轮（3）的内侧，尺带（4）卷绕于转轮（3）的外侧；转轮（3）上设有圆心位于其转动中心的圆形阻尼槽（31），圆形阻尼槽（31）内设有阻尼结构（8）；阻尼结构（8）包括与转轮（3）相连可由转轮（3）带动作转动的长条形连接件（81）和一对分别铰接于长条形连接件（81）两端的减速片（82）；减速片（82）位于尺带（4）回收时与长条形连接件（81）转动方向相反的一侧，并呈向长条形连接件（81）的转动中心弯曲的形状。在对尺带（4）进行收卷时，卷尺内部的阻尼结构（8）会对转轮（3）的转速进行限制使得尺带（4）收入尺壳（1）内的速度得到降低，减少了尺带（4）回缩时划伤使用者的可能性。

Description

一种带有阻尼结构的卷尺 技术领域
本发明涉及测量装置技术领域，具体涉及一种带有阻尼结构的卷尺。
 背景技术
卷尺是日常生活中常用的工量具，主要类型有钢卷尺和纤维卷尺。大家经常看到的是钢卷尺，广泛应用于木工、建筑、装修等领域，也是家庭必备工具之一，能够完成对较长工件尺寸或距离的测量。
现有的钢卷尺一般包括尺壳，设于尺壳内部的发条弹簧、转轮和尺带，以及设于尺带上的尺钩；使用时，将尺钩挂在被测件的边缘，然后拉出尺带，对被测件进行测量；测量完成后，放开尺带，卷尺内的发条弹簧会带动转轮转动对卷尺尺带进行收卷，为了保证较长的尺带能够完全收卷到卷尺壳内，发条弹簧的拉力普遍较大，因此尺带的回缩速度较快。当尺带快速收卷时，不仅容易导致卷尺内部结构的损坏，而且尺带两侧较薄很容易割伤使用者的手。
 技术问题
为了克服现有技术中所存在的上述不足，本发明提供了一种带有阻尼结构的卷尺，在对卷尺尺带进行收卷时，卷尺内部的阻尼结构会在摩擦力的作用下对转轮的转速进行限制进而使得尺带收入卷尺壳内的速度得到降低，减少了尺带回缩时划伤使用者的可能性。
 技术解决方案
本发明的技术方案：一种带有阻尼结构的卷尺，包括由A半壳和B半壳构成的尺壳，所述尺壳的内部设有发条弹簧、转轮和尺带；所述B半壳的中部固定设有芯轴；所述转轮套装于芯轴上，可绕芯轴转动；所述发条弹簧设于转轮的内侧，其内端与芯轴连接，其外端与转轮连接；所述尺带卷绕于转轮的外侧；所述尺带内端与转轮连接，外端设有用于与尺壳配合形成限位的尺钩；所述转轮上设有圆心位于其转动中心的圆形阻尼槽，圆形阻尼槽内设有阻尼结构；所述阻尼结构包括与转轮相连可由转轮带动作转动的长条形连接件和一对分别铰接于长条形连接件两端的减速片；所述减速片位于尺带回收时与长条形连接件转动方向相反的一侧，并呈向长条形连接件的转动中心弯曲的形状。
 有益效果
与现有技术相比，本申请的带有阻尼结构的卷尺设计新颖，操作简单方便，适用性强；在对尺带进行回收时，发条弹簧收缩的力量带动转轮转动对尺带进行收卷，阻尼结构由转轮带动与转轮同步转动，减速片由于受到离心力的作用而被甩出，与圆形阻尼槽的槽壁接触并产生摩擦阻力，对转轮的转速进行限制，使得尺带收入卷尺壳内的速度得到降低，减少了尺带回缩时划伤使用者的可能性，也降低了卷尺内部结构的损坏率，提高了卷尺的使用寿命。
作为优化，所述减速片包括减速片主体，减速片主体的外端设有用于增加减速片和圆形阻尼槽的槽壁之间摩擦系数的摩擦片。进一步的，所述摩擦片为橡胶材质。橡胶材质的摩擦片与圆形阻尼槽槽壁之间的摩擦系数较大，进而保证了在卷尺回缩时减速片能够轻松依靠摩擦力对转轮的转速进行限制；此外，橡胶材质有弹性，具有很好的耐磨性，不易损坏，保证了减速片的使用寿命，而且橡胶价格低廉，有利于控制制造成本。
作为优化，所述减速片主体与摩擦片可拆连接。从而，当卷尺使用时间过长时，方便将摩擦片拆下换上新的摩擦片。进一步的，所述减速片主体上设有卡接槽，对应的，所述摩擦片上设有卡接头，减速片主体与摩擦片通过卡接槽和卡接头的配合实现连接。此时，易于实施，拆装方便，而且卡接头与卡接槽之间的限位结构还可以保证减速片主体与摩擦片之间的连接牢固度。
作为优化，所述减速片主体呈铰接端小工作端大的形状。卷尺尺带回缩时，减速片由于受到离心力的作用被甩出，进而与圆形阻尼槽的槽壁接触产生摩擦阻力；而离心力的大小与物体的质量以及环绕半径有关，将工作端设计得大一点，更方便减速片在离心力的作用下被甩出。
作为优化，所述尺壳的侧部设有制动装置。制动装置的设计使得尺带拉出尺壳后，可达到稳固定位的功效。进一步的，所述制动装置包括连杆，所述连杆的下部设有制动块，所述制动块的下端设有制动接触部；所述连杆的中部设有制动按钮，所述制动按钮的外侧裸露于尺壳外。制动装置采用上述结构，使用操作方便，且易于实施。
作为优化，所述A半壳的中心设有螺纹安装孔，用于安装腰扣。在用户有需要时，只需要使用螺钉与螺纹安装孔配合，即可将腰扣固定于A半壳上；在尺壳上安装腰扣后，当用户不需要使用卷尺时，即可通过腰扣将卷尺别于腰带上，方便携带。
作为优化，所述尺壳上设有挂环，用于安装挂绳。安装时，只需要将挂绳穿过挂环，实现挂绳与尺壳的连接；挂绳安装后，便于卷尺的悬挂，携带方便，不易丢失。
 附图说明
图1是本发明的带有阻尼结构的卷尺拆掉B半壳的结构示意图；
图2是本发明中的B半壳的结构示意图；
图3是本发明中的阻尼结构的结构示意图；
图4是本发明中的摩擦片的结构示意图；
图5是本发明中的减速片主体的结构示意图；
图6是本发明中的转轮的结构示意图；
图7是本发明中的制动装置的结构示意图；
图8是本发明的带有阻尼结构的卷尺的一个具体实施例的结构示意图。
附图中的标记为：1-尺壳，11-A半壳、111-螺纹安装孔，12-B半壳，13-挂环；2-发条弹簧；3-转轮，31-圆形阻尼槽，32-卡柱；4-尺带；5-制动装置，51-连杆，52-制动块、521-制动接触部，53-制动按钮；6-尺钩；7-芯轴；8-阻尼结构，81-长条形连接件，82-减速片、821-减速片主体、8211-卡接槽、822-摩擦片、8221-卡接头；9-腰扣。
 本发明的最佳实施方式
下面结合附图和实施例对本发明作进一步的说明，但并不作为对本发明限制的依据。
实施例1：
参见图1至图7，本发明的带有阻尼结构的卷尺，包括由A半壳11和B半壳12（A半壳11和B半壳12可选用ABS材质；ABS材质的尺壳1具有很好的韧性和冲击性，使得本发明的卷尺抗砸耐用，不宜摔坏，具有较高的使用寿命，而且卷尺采用ABS材质，减轻了结构重量，降低了原材料的消耗，节约了生产成本）构成的尺壳1（所述A半壳11和B半壳上对应设有用于固定的螺纹孔。安装时，将螺钉依次穿过A半壳11和B半壳上的螺纹孔，即可实现A半壳11与B半壳12的连接固定，操作简单），所述尺壳1的内部设有发条弹簧2、转轮3和尺带4（尺带4可采用高碳钢锻造，设置成微U型表面，此时硬度高韧性好，坚固耐磨不易生锈；尺带4可采用丙烯酸烤漆，表面亚光覆膜处理，进而使得尺带4可随意弯曲，不易断裂；尺带4至少一面设置刻度，可以正反面分别设置不同度量单位的刻度）；所述B半壳12的中部固定设有芯轴7（芯轴7可采用锌合金钢制造）；所述转轮3套装于芯轴7上，可绕芯轴7转动；所述发条弹簧2设于转轮3的内侧，其内端与芯轴7连接，其外端与转轮3连接；所述尺带4卷绕于转轮3的外侧；所述尺带4内端与转轮3连接，外端设有用于与尺壳1配合形成限位的尺钩6；所述转轮3上设有圆心位于其转动中心的圆形阻尼槽31，圆形阻尼槽31内设有阻尼结构8；所述阻尼结构8包括与转轮3相连（圆形阻尼槽31的中部设有卡柱32，卡柱32的中心设有可供芯轴7通过的轴孔；卡柱32呈六棱形，对应的，长条形连接件81的中部设有可与卡柱32卡接配合的卡槽；卡柱32和长条形连接件81采用特定的构造，使得两者之间的连接更加可靠）可由转轮3带动作转动的长条形连接件81和一对分别铰接于长条形连接件81两端的减速片82；所述减速片82位于尺带4回收时与长条形连接件81转动方向相反的一侧，并呈向长条形连接件81的转动中心弯曲的形状。
参见图3，所述减速片82包括减速片主体821，减速片主体821的外端设有用于增加减速片82和圆形阻尼槽31的槽壁之间摩擦系数的摩擦片822。进一步的，所述摩擦片822为橡胶材质。橡胶材质的摩擦片822与圆形阻尼槽31槽壁之间的摩擦系数较大（转轮3可采用ABS材质，橡胶材质与ABS材质之间的摩擦系数较大），进而保证了在卷尺回缩时减速片82能够轻松依靠摩擦力对转轮3的转速进行限制；此外，橡胶材质有弹性，具有很好的耐磨性，不易损坏，保证了减速片82的使用寿命，而且橡胶价格低廉，有利于控制制造成本。
参见图4和图5，所述减速片主体821与摩擦片822可拆连接。从而，当卷尺使用时间过长时，方便将摩擦片822拆下换上新的摩擦片822，保证减速片82与圆形阻尼槽31槽壁之间一直具有较高的摩擦系数。进一步的，所述减速片主体821上设有卡接槽8211，对应的，所述摩擦片822上设有卡接头8221，减速片主体821与摩擦片822通过卡接槽8211和卡接头8221的配合实现连接。此时，安装方便，而且卡接头8221与卡接槽8211之间的限位结构还可以保证减速片主体821与摩擦片822之间的连接牢固度。
所述减速片主体821呈铰接端小工作端大的形状。卷尺尺带回缩时，减速片82由于受到离心力的作用被甩出，进而与圆形阻尼槽31的槽壁接触产生摩擦阻力；而离心力的大小与物体的质量以及环绕半径有关，将工作端设计得大一点，更方便减速片82在离心力的作用下被甩出。
所述尺壳1的侧部设有制动装置5。制动装置5的设计使得尺带4拉出尺壳1后，可达到稳固定位的功效。进一步的，参见图7，所述制动装置5包括连杆51，所述连杆51的下部设有制动块52，所述制动块52的下端设有制动接触部521；所述连杆51的中部设有制动按钮53，所述制动按钮53的外侧裸露于尺壳1外。制动装置5采用上述结构，使用操作方便，且易于实施。当向下推动制动按钮53时，制动接触部521顶压尺带4而达到制动尺带4的目的；将制动按钮53向上拨，解除制动接触部521对尺带4的顶压，尺带4恢复自动回缩或被拉出状态。
实施例2：
参见图8，与实施例1不同的是，所述A半壳11的中心设有螺纹安装孔111，用于安装腰扣9。在用户有需要时，只需要使用螺钉与螺纹安装孔111配合，即可将腰扣9固定于A半壳11上；在尺壳1上安装腰扣9后，当用户不需要使用卷尺时，即可通过腰扣9将卷尺别于腰带上，方便携带。
所述尺壳1上设有挂环13，用于安装挂绳。安装时，只需要将挂绳穿过挂环13，实现挂绳与尺壳1的连接；挂绳安装后，便于卷尺的悬挂，携带方便，不易丢失。
工作原理：
使用时，将尺钩6挂在被测件的边缘，将尺带4拉出，在尺带4拉出尺壳1的过程中，尺壳1内部的阻尼结构8与转轮3同步转动，减速片82在离心力的作用下会向长条形连接件81的转动中心处运动，其外端的摩擦片822不会与圆形阻尼槽31的槽壁接触，对转轮3没有阻力，不会影响尺带4的拉出；将尺带4拉出后，向下推动制动按钮53制动尺带4，对被测件进行测量；测量完成后，向上推动制动按钮53归位，尺带4回缩，发条弹簧2收缩的力量带动转轮3转动对尺带4进行收卷，阻尼结构8与转轮3同步转动，减速片82受到离心力的作用向圆形阻尼槽31的槽壁一侧被甩出，其外端的摩擦片822与圆形阻尼槽31的槽壁接触并产生摩擦阻力，对转轮3的转速进行限制，使得尺带4收入卷尺壳1内的速度得到降低。
上述对本申请中涉及的发明的一般性描述和对其具体实施方式的描述不应理解为是对该发明技术方案构成的限制。本领域所属技术人员根据本申请的公开，可以在不违背所涉及的发明构成要素的前提下，对上述一般性描述或/和具体实施方式（包括实施例）中的公开技术特征进行增加、减少或组合，形成属于本申请保护范围之内的其它的技术方案。

Claims (10)

  1. 一种带有阻尼结构的卷尺，包括由A半壳（11）和B半壳（12）构成的尺壳（1），所述尺壳（1）的内部设有发条弹簧（2）、转轮（3）和尺带（4）；所述B半壳（12）的中部固定设有芯轴（7）；所述转轮（3）套装于芯轴（7）上，可绕芯轴（7）转动；所述发条弹簧（2）设于转轮（3）的内侧，其内端与芯轴（7）连接，其外端与转轮（3）连接；所述尺带（4）卷绕于转轮（3）的外侧；所述尺带（4）内端与转轮（3）连接，外端设有用于与尺壳（1）配合形成限位的尺钩（6）；
    其特征在于：所述转轮（3）上设有圆心位于其转动中心的圆形阻尼槽（31），圆形阻尼槽（31）内设有阻尼结构（8）；所述阻尼结构（8）包括与转轮（3）相连可由转轮（3）带动作转动的长条形连接件（81）和一对分别铰接于长条形连接件（81）两端的减速片（82）；所述减速片（82）位于尺带（4）回收时与长条形连接件（81）转动方向相反的一侧，并呈向长条形连接件（81）的转动中心弯曲的形状。
  2. 根据权利要求1所述的带有阻尼结构的卷尺，其特征在于：所述减速片（82）包括减速片主体（821），减速片主体（821）的外端设有用于增加减速片（82）和圆形阻尼槽（31）的槽壁之间摩擦系数的摩擦片（822）。
  3. 根据权利要求2所述的带有阻尼结构的卷尺，其特征在于：所述摩擦片（822）为橡胶材质。
  4. 根据权利要求3所述的带有阻尼结构的卷尺，其特征在于：所述减速片主体（821）与摩擦片（822）可拆连接。
  5. 根据权利要求4所述的带有阻尼结构的卷尺，其特征在于：所述减速片主体（821）上设有卡接槽（8211），对应的，所述摩擦片（822）上设有卡接头（8221），减速片主体（821）与摩擦片（822）通过卡接槽（8211）和卡接头（8221）的配合实现连接。
  6. 根据权利要求2所述的带有阻尼结构的卷尺，其特征在于：所述减速片主体（821）呈铰接端小工作端大的形状。
  7. 根据权利要求1至6任一权利要求所述的带有阻尼结构的卷尺，其特征在于：所述尺壳（1）的侧部设有制动装置（5）。
  8. 根据权利要求7所述的带有阻尼结构的卷尺，其特征在于：所述制动装置（5）包括连杆（51），所述连杆（51）的下部设有制动块（52），所述制动块（52）的下端设有制动接触部（521）；所述连杆（51）的中部设有制动按钮（53），所述制动按钮（53）的外侧裸露于尺壳（1）外。
  9. 根据权利要求1至6任一权利要求所述的带有阻尼结构的卷尺，其特征在于：所述A半壳（11）的中心设有螺纹安装孔（112），用于安装腰扣。
  10. 根据权利要求1至6任一权利要求所述的带有阻尼结构的卷尺，其特征在于：所述尺壳（1）上设有挂环（9），用于安装挂绳。
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