Multifunctional tape brake structure

Abstract

The utility model relates to the technical field of measuring equipment, in particular to a multifunctional tape brake structure. Comprising a tape box, a tape wheel, a tape and a brake mechanism located in the tape box, the tape wheel is rotationally connected in the tape box, the tape is wound on the tape wheel, the brake mechanism is installed at a drawing opening of the tape and the tape box, the brake mechanism comprises a push key, a push key switch, a brake pad and a spring, and the push key is composed of a sliding component and a driving component. Wherein a sliding groove connected with the push key switch is formed in the front face of the sliding part, a wavy movement stopping piece connected with the push key switch in a clamped mode is further arranged in the sliding groove, the middle of the back face of the sliding part is rotationally connected with the tape box, the driving part is fixedly connected to the lower end of the sliding part, and the brake pad is located at the lower end of the push key. And a spring connected with the tape box is mounted on the front surface of the driving part. The multifunctional flexible rule brake structure integrates manual operation, automatic operation and non-brake, and is simple in structure and low in production cost.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring equipment, in particular to a multifunctional measuring tape brake structure. Background Art

[0002] Tape measures are common measuring tools in daily life. The most common ones are steel tape measures, commonly used in construction and renovation, and are also essential household tools. Currently, there are two main types of braking methods for tape measures: manual and automatic. With simple manual braking, the tape is pulled out and, under the action of a spring, it releases and automatically retracts. Pull it out to the measuring position and push or press the locking device to lock it. It automatically retracts after unlocking. With automatic braking, the tape is automatically locked when pulled out and automatically retracts via the unlocking device. Release to brake at any time. Manual braking is less safe than automatic braking, but professionals are skilled in its use and have little demand for automatic braking. To address market concerns about braking and meet the needs of different usage scenarios and types of work, a tape measure that combines automatic braking and manual braking is needed.

[0003] Chinese patent authorization announcement CN218410920U discloses a multifunctional self-locking brake with a gear for measuring tapes. In addition to the traditional mechanical brake lock and unlock functions of pushing and pulling, the brake block can also be automatically locked when the brake block is at the front and unlocked with a light press. Furthermore, by pushing the brake block to the rear, the brake pad and gear are separated, allowing the device to be used in an unlocked state. This utility model significantly improves the device's applicable environment and overall performance, making it practical, simple, safe, reliable, long-lasting, and easy to promote. However, this brake structure requires the assembly of the corresponding brake block, brake pad, and gear inside the measuring tape, which is not only complex and costly, but also cannot be used on tape measure boxes with conventional structures. Utility Model Content

[0004] The purpose of the utility model is to provide a multifunctional measuring tape brake structure which integrates manual, automatic and brake-free functions and has a simple structure and low production cost.

[0005] The brake pad is located at the lower end of the push button, and its upper portion is rotatably connected to the tape measure box, and its lower portion is rotatably connected to the driving component. A spring connected to the tape measure box is installed on the front of the driving component, and the push button switch slides in the upper, middle and lower gears of the push button to switch the brake pad to no brake, automatic brake and manual brake states.

[0006] Furthermore, the push-button switch is composed of a pressing part, a limiting part and a clamping part, wherein the pressing part is located on the front of the push-button switch, with high ends and low middle, forming an arc-shaped structure. The pressing part is provided with slots for increasing friction. The limiting part is installed at the upper and lower ends of the push-button switch. When pushed upward or downward, the limiting part will exceed the upper and lower contours of the push button, causing the limiting part and the shell of the tape measure box to be squeezed and drive the push button to rotate and displace. The clamping part is installed in the middle of the back of the push-button switch, consisting of three arc-shaped transition grooves, and the grooves are clamped with the blocking member.

[0007] Furthermore, the brake pad includes a rotating part and a braking part, the rotating part is composed of a first rotating shaft and a bending arm, and the braking part is composed of a second rotating shaft and a brake claw, the first rotating shaft is rotatably connected to the tape measure box and is fixed in the tape measure box, the two ends of the bending arm are respectively fixed on the first rotating shaft and the second rotating shaft, and the bending part is arranged close to the spring, the brake claw is fixedly mounted on the second rotating shaft, and the second rotating shaft is rotatably connected to the lower end of the driving component.

[0008] Furthermore, the spring is a compression spring.

[0009] The beneficial effects of the utility model are: 1) the utility model switches the three gear states by sliding the push button on the push button, and drives the brake pad to switch the three modes of no brake, automatic brake and manual brake under the action of the push button, the tape measure box and the spring, which can meet different usage scenarios, and has a simple structure and does not require the structure of the ruler wheel to be modified, so the production cost is low and it is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram of the present utility model.

[0011] Figure 2 It is a connection diagram of the brake mechanism in the utility model.

[0012] Figure 3 It is a side view of the brake mechanism in the present utility model.

[0013] Figure 4 It is a rear view of the brake mechanism in the utility model.

[0014] Figure 5 It is a structural schematic diagram of the push button in the utility model.

[0015] Figure 6 It is a side view of the push button switch in the utility model.

[0016] Figure 7 This is the front view of the push-button switch in the utility model.

[0017] Figure 8 It is a rear view of the push button switch in the utility model.

[0018] Figure 9 It is a structural schematic diagram of the brake pad in this utility model.

[0019] In the figure: 1. Tape measure box; 2. Measure wheel; 3. Measure tape; 4. Brake mechanism; 5. Push button; 6. Push button switch; 7. Brake pad; 8. Spring; 9. Sliding component; 10. Driving component; 11. Slide groove; 12. Blocking member; 13. Pressing part; 14. Limiting part; 15. Clamping part; 16. Slot hole; 17. Groove; 18. Rotating part; 19. Braking part; 20. First rotating shaft; 21. Bending arm; 22. Second rotating shaft; 23. Brake claw. DETAILED DESCRIPTION

[0020] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0021] Example: Figure 1-9As shown, the utility model is a multifunctional tape measure brake structure, comprising a tape measure box 1, a ruler wheel 2, a ruler tape 3 and a brake mechanism 4 located in the tape measure box 1, the ruler wheel 2 is rotatably connected to the tape measure box 1, the ruler tape 3 is wound around the ruler wheel 2, and the brake mechanism 4 is installed on the ruler tape 3 and the draw-out opening of the tape measure box 1, the brake mechanism 4 comprises a push button 5, a push button switch 6, a brake pad 7 and a spring 8, the push button 5 is composed of a sliding component 9 and a driving component 10, wherein the sliding component 9 is provided with a slide groove 11 connected to the push button switch 6 on the front side, and the sliding groove 11 is provided on the front side of the sliding component 9. A wavy slide groove 12 is also provided in the groove 11, which is engaged with the push button switch 6. The middle part of the back of the sliding component 9 is rotatably connected to the tape measure box 1, and the driving component 10 is fixedly connected to the lower end of the sliding component 9. The brake pad 7 is located at the lower end of the push button 5, and its upper part is rotatably connected to the tape measure box 1, and the lower part is rotatably connected to the driving component 10. A spring 8 connected to the tape measure box 1 is installed on the front of the driving component 10. The push button switch 6 slides on the upper, middle and lower gears of the push button 5 to switch the brake pad 7 to no brake, automatic brake and manual brake states.

[0022] The push-button switch 6 is composed of a pressing portion 14, a pressing portion 14 and a clamping portion 15, wherein the pressing portion 14 is located on the front of the push-button switch 6, with high ends and low middle, and an arc-shaped structure. The pressing portion 14 is provided with a slot 16 for increasing friction. The pressing portion 14 is installed at the upper and lower ends of the push-button switch 6. When pushed upward or downward, the pressing portion 14 will exceed the upper and lower contours of the push button 5, so that the pressing portion 14 and the shell of the tape measure box 1 are squeezed to drive the push button 5 to rotate and displace. The clamping portion 15 is installed in the middle of the back of the push-button switch 6, and is composed of three arc-shaped transition grooves 17, and the groove 17 is clamped with the slide groove 12.

[0023] The brake pad 7 includes a rotating portion 18 and a braking portion 19. The rotating portion 18 comprises a first rotating shaft 20 and a curved arm 21, while the braking portion 19 comprises a second rotating shaft 22 and a brake pawl 23. The first rotating shaft 20 is rotatably connected to the tape measure case 1 and is fixed within the tape measure case 1. The ends of the curved arm 21 are fixed to the first and second rotating shafts 20, 22, respectively, with the curved portion positioned adjacent to the spring 8. The brake pawl 23 is fixed to the second rotating shaft 22, which is rotatably connected to the lower end of the drive component 10. The curved arm 21 cushions the contact force between the brake pad 7 and the tape 3. When the brake pad 7 and the tape 3 become stuck, the deformation of the curved arm 21 relieves the pushing force on the brake pad 7, preventing damage to the tape 3 when the push button 5 is pushed to stop it. The spring 8 is a compression spring 8.

[0024] refer to Figure 1 ,

[0025] During specific use: the housing of the tape measure case 1 limits the sliding member 9 on the push button 5 so that it can only rotate clockwise or counterclockwise about the rotation connection point in the middle of the back of the sliding member 9. At the same time, the rotating portion 18 of the brake pad 7 is also limited on the tape measure case 1 and can only rotate about the first rotation axis 20.

[0026] When the push button 5 rotates clockwise, the driving component 10 on the push button 5 also rotates clockwise, and the brake part 19, which is rotatably connected to the lower end of the driving component 10, also rotates clockwise, driving the rotating part 18 to rotate clockwise. At this time, the spring 8 is squeezed, and the brake claw 23 moves clockwise, thereby disengaging from the tape 3. The tape measure is completely released and is in an unbraked state.

[0027] Similarly, when the push button 5 rotates counterclockwise, the driving component 10 on the push button 5 also rotates counterclockwise, and the brake part 19 rotatably connected to the lower end of the driving component 10 also rotates counterclockwise, driving the rotating part 18 to rotate counterclockwise. At this time, the spring 8 is stretched, and the brake claw 23 moves counterclockwise, so that it gets closer to the tape 3, locking the tape 3 and locking it. The tape measure is completely locked and is in the manual brake state.

[0028] When the push button 5 is stationary and in the middle position, the tape 3 is pulled out to the left, which will drive the brake claw 23 to rotate clockwise. Similarly, the brake pad 7 and the push button switch 6 rotate clockwise. At this time, the spring 8 is compressed and stored. After pulling it out a distance and letting go, the tape 3 tends to retract to the right under the drive of the scale wheel 2 and the internal reset structure. At this time, the spring 8 releases its elastic force, which will drive the brake pad 7 to push out to the right, that is, drive the brake pad 7 to reset counterclockwise. At this time, the brake claw 23 moves counterclockwise and resets, and contacts the tape 3 to brake it. The tape measure is in an automatic braking state, that is, the tape 3 can be pulled out freely. After letting go, the limit is locked. At this time, pressing the push button 5 will make the push button 5, the push button switch 6, and the brake pad 7 rotate clockwise, so that the brake claw 23 disengages from the tape 3, and the tape 3 can be retracted.

[0029] Specifically, in the non-braking state, the push button 5 is at the upper part of the push button switch 6, that is, the push button 5 slides upward from the middle to the upper part. At this time, the pressing part 14 on the push button 5 moves upward and exceeds the outline of the upper part of the push button switch 6. Continuing to move will squeeze with the shell, causing the push button 5 to move inward, that is, with the middle part of the push button 5 as the rotation center, driving the push button 5 to rotate clockwise, thereby driving the push button switch 6 and the brake pad 7 to rotate clockwise, so that the brake claw 23 disengages from the scale tape 3, and the scale tape 3 is pulled out and retracted without hindrance.

[0030] In the manual brake state, the push button 5 is at the lower part of the push button switch 6, that is, the push button 5 slides downward from the middle to the lower part. At this time, the pressing part 14 on the push button 5 moves downward and exceeds the outline of the lower part of the push button switch 6. Continuing to move will squeeze with the shell, causing the push button 5 to move inward, that is, with the middle of the push button 5 as the rotation center, driving the push button 5 to rotate counterclockwise, thereby driving the push button switch 6 and the brake pad 7 to rotate counterclockwise, so that the brake claw 23 is closer to the tape 3, locking the tape 3 to lock it, and the tape 3 needs to be manually released when pulling out and retracting.

[0031] In the automatic braking state, the push button 5 is in the middle of the push button switch 6 and is not squeezed with the housing. The braking action is triggered by the tape 3 and the spring 8. When pulled out, the tape 3 moves and squeezes the spring 8. After releasing the hand, the spring 8 resets, driving the brake claw 23 to rotate counterclockwise, so that the brake claw 23 is closer to the tape 3, locking the tape 3. The tape 3 can be pulled out without limit and can move freely. It needs to be manually released from the limit when it is retracted.

[0032] The utility model switches between three gear states by sliding a push button switch on the push button. Under the action of the push button, the tape measure box and the spring, the brake pads are driven to switch between three modes: no braking, automatic braking and manual braking. It can meet different usage scenarios, and has a simple structure and does not require the structure of the ruler wheel to be modified, so the production cost is low and it is easy to use.

[0033] The above description is only used to illustrate the technical solution of the present invention and is not intended to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in this field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A multifunctional measuring tape brake structure, characterized by: The invention comprises a tape measure box, a ruler wheel, a ruler tape and a brake mechanism located in the tape measure box, the ruler wheel is rotatably connected to the tape measure box, the ruler tape is wound on the ruler wheel, and a brake mechanism is installed on the ruler tape and the draw-out opening of the tape measure box, wherein the push button is composed of a sliding component and a driving component, wherein a slide groove connected to the push button switch is provided on the front of the sliding component, and a wavy blocking member engaged with the push button switch is also provided in the slide groove, the middle part of the back side of the sliding component is rotatably connected to the tape measure box, and the driving component is fixedly connected to the lower end of the sliding component, the brake pad is located at the lower end of the push button, the upper part of the push button is rotatably connected to the tape measure box, and the lower part is rotatably connected to the driving component, and a spring connected to the tape measure box is installed on the front side of the driving component, and the push button switch slides in the upper, middle and lower gears of the push button to switch the brake pad to no brake, automatic brake and manual brake states.

2. The multifunctional tape measure brake structure according to claim 1, characterized in that: The push-button switch consists of a pressing part, a limiting part and a clamping part, wherein the pressing part is located on the front of the push-button switch, with the two ends higher and the middle lower, forming an arc-shaped structure. The pressing part is provided with slots for increasing friction. The limiting part is installed at the upper and lower ends of the push-button switch. When pushed upward or downward, the limiting part will exceed the upper and lower contours of the push button, causing the limiting part and the shell of the tape measure box to be squeezed and drive the push button to rotate and displace. The clamping part is installed in the middle of the back of the push-button switch, consisting of three arc-shaped transition grooves, and the grooves are clamped with the blocking member.

3. The multifunctional tape measure brake structure according to claim 1, characterized in that: The brake pad includes a rotating part and a braking part, the rotating part consists of a first rotating shaft and a bending arm, and the braking part consists of a second rotating shaft and a brake claw. The first rotating shaft is rotatably connected to the tape measure box and is fixed in the tape measure box. The two ends of the bending arm are respectively fixed on the first rotating shaft and the second rotating shaft, and the bending part is arranged close to the spring. The brake claw is fixedly installed on the second rotating shaft, and the second rotating shaft is rotatably connected to the lower end of the driving component.

4. The multifunctional tape measure brake structure according to claim 1, characterized in that: The spring is a compression spring.

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