Fatigue testing device for magic tape

Abstract

The utility model relates to the technical field of hook-and-loop fasteners, and discloses a fatigue testing device for a hook-and-loop fastener, which comprises a main body, the outer wall of the main body is rotatably connected with a rotating wheel and a connecting block, the outer wall of the connecting block is fixedly provided with a support rod, the inner wall of the support rod is rotatably connected with a driven wheel, and the driven wheel is rotatably connected with the rotating wheel and the connecting block. A gear is fixedly mounted on the outer wall of the driven wheel, a gear block is mounted on the outer wall of the gear, and a box body is slidably connected to the outer wall of the gear block. According to the fatigue testing device for the hook-and-loop fastener, the hook-and-loop fastener is placed on the inner wall of the driven wheel, part of the hook-and-loop fastener is wound on the outer wall of the driven wheel or the rotating wheel through a notch of the driven wheel, the hook-and-loop fastener is used for extruding a limiting plate, and the limiting plate extrudes a third spring through a circular plate; the width of the notch can be changed according to the width of the hook-and-loop fastener, the application range is widened, the hook-and-loop fastener is prevented from falling off in the testing process, and the hook-and-loop fastener cannot fall off in the equipment testing process.

Description

Technical Field

[0001] The utility model relates to the technical field of hook and loop fasteners, in particular to a fatigue testing device for hook and loop fasteners. Background Art

[0002] Velcro, also known as magic tape or snap fastener, is a commonly used connecting material on clothing. It is widely used in clothing, shoes, hats, gloves, leather bags, sofas, etc. The molecular matrix has two sides. One side of the Velcro is made of small and soft fibers and round hairs, and the other side is made of harder hairs with hooks. The peel force fatigue of the Velcro is an important indicator in performance testing. If the peel force fatigue does not meet the expected performance, it will lead to a decline in product performance and a reduction in service life, seriously affecting product quality.

[0003] During use of the existing fatigue testing device for Velcro, the Velcro is wrapped around the outer wall of the test wheel and no limiting structure is provided, which causes the Velcro to easily deviate during the rotation test of the equipment, resulting in poor equipment testing results. At the same time, the test wheel cannot be stabilized during the adjustment rotation process, and the test wheel drives the Velcro to easily rotate, resulting in deviations in the adjustment accuracy. Utility Model Content

[0004] In response to the deficiencies of the prior art, the present invention provides a fatigue testing device for Velcro, which has the advantages of being adjustable for different Velcro sizes and having a stable test wheel, thereby solving the problems raised by the above-mentioned background technology.

[0005] The outer wall of the gear train is fixedly mounted on the gear unit and the outer wall of the gear train is fixedly mounted on the gear train, and the gear train is fixedly mounted on the gear unit and the outer wall of the gear train is fixedly mounted on the gear unit.

[0006] As a preferred technical solution of the present invention: the outer wall of the gear meshes with the outer wall of the tooth block, the inner wall of the box body is provided with a square groove, and the outer wall of the square groove is adapted to the outer wall of the tooth block.

[0007] As a preferred technical solution of the present invention: one end of the second spring is fixed to the outer wall of the tooth block, and the other end of the second spring is fixed to the inner wall of the box body.

[0008] As a preferred technical solution of the present invention: a circular hole is opened on the outer wall of the pull rod, and the diameter of the circular hole is the same as the diameter of the outer wall of the pull plate.

[0009] As a preferred technical solution of the present invention: the outer wall of the limiting plate is semi-arc-shaped, and the two limiting plates are distributed on the outer walls on both sides of the driven wheel.

[0010] As a preferred technical solution of the present invention: one end of the third spring is located on the outer wall of the limiting plate, and the other end of the third spring is located on the inner wall of the driven wheel.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The fatigue testing device for the Velcro places the Velcro on the inner wall of the driven wheel, uses the notch of the driven wheel to wrap part of the Velcro around the outer wall of the driven wheel or the rotating wheel, uses the Velcro to squeeze the limit plate, and the limit plate squeezes the third spring through the circular plate. The notch width can be changed according to the width of the Velcro, thereby increasing the scope of application and preventing the Velcro from falling off during the test, so that the Velcro will not fall off during the equipment test.

[0013] 2. The fatigue testing device for Velcro uses external force to pull the pull rod, which drives the tooth block to resist the second spring, forming compression, so that the tooth block slides on the inner wall of the box body, and the tooth block is separated from the outer wall of the gear, so that the driven wheel can rotate. The pull rod is released by external force, and the pull rod pushes the tooth block through the elastic force of the second spring, so that the tooth block engages with the outer wall of the gear, and the gear drives the driven wheel to stop rotating, thereby achieving stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the gear structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the gear block structure of the utility model;

[0017] Figure 4 This is a schematic diagram of the second spring structure of the utility model;

[0018] Figure 5 This is a schematic diagram of the third spring structure of the present utility model.

[0019] In the figure: 1. main body; 2. driven wheel; 3. support rod; 4. box body; 5. gear; 6. support plate; 7. rotating wheel; 8. pull plate; 9. first spring; 10. limit plate; 11. pull rod; 12. tooth block; 13. second spring; 14. limit rod; 15. circular plate; 16. third spring; 17. connecting block; 18. weight. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1 - Figure 5 A fatigue test device for a hook and loop fastener comprises a main body 1, the outer wall of the main body 1 is rotatably connected to a rotating wheel 7, the outer wall of the main body 1 is rotatably connected to a connecting block 17, the outer wall of the connecting block 17 is fixedly mounted with a support rod 3, the inner wall of the support rod 3 is rotatably connected to a driven wheel 2, the outer wall of the driven wheel 2 is fixedly mounted with a gear 5, the outer wall of the gear 5 is mounted with a tooth block 12, the outer wall of the tooth block 12 is slidably connected to a box body 4, the inner wall of the box body 4 is slidably sleeved with a pull rod 11, and the outer wall of the box body 4 is fixed with a gear 5. A second spring 13 is fixedly mounted on the inner wall, a support plate 6 is fixedly mounted on the outer wall of the main body 1, a pull plate 8 is slidably sleeved on the inner wall of the support plate 6, a first spring 9 is movably sleeved on the outer wall of the pull plate 8, a limit rod 14 is slidably sleeved on the inner wall of the driven wheel 2, a limit plate 10 is fixedly mounted on the outer edge of one end of the limit rod 14, a circular plate 15 is fixedly mounted on the outer wall of the limit rod 14, a third spring 16 is movably sleeved on the outer wall of the limit rod 14, and a weight 18 is slidably connected to the outer wall of the connecting block 17.

[0022] In the above structure, a connecting block 17 is rotatably connected to the outer wall of the main body 1, and the connecting block 17 is used to drive the driven wheel 2 to rotate on the outer wall of the main body 1, so that the driven wheel 2 drives the Velcro to achieve angle adjustment and fit with the Velcro on the outer wall of the rotating wheel 7, thereby increasing the operation stability of the equipment.

[0023] In a preferred embodiment, the outer wall of the gear 5 meshes with the outer wall of the tooth block 12 , the inner wall of the box body 4 is provided with a square groove, and the outer wall of the square groove matches the outer wall of the tooth block 12 .

[0024] In the above structure, the pull rod 11 is pulled by external force, and the pull rod 11 is used to drive the tooth block 12 to separate from the outer wall of the gear 5, so that the driven wheel 2 drives the Velcro to rotate for testing. When the pull rod 11 is pulled to drive the tooth block 12, the tooth block 12 slides on the inner wall of the box body 4, thereby protecting the tooth block 12 when not in use.

[0025] In a preferred embodiment, one end of the second spring 13 is fixed to the outer wall of the tooth block 12 , and the other end of the second spring 13 is fixed to the inner wall of the box body 4 .

[0026] In the above structure, the other end of the second spring 13 is fixed to the inner wall of the box body 4, and the pull rod 11 is pulled by external force. The pull rod 11 drives the tooth block 12 to resist the second spring 13, forming compression, so that the tooth block 12 slides on the inner wall of the box body 4, and the tooth block 12 is disengaged from the outer wall of the gear 5, so that the driven wheel 2 can rotate. The pull rod 11 is released by external force, and the pull rod 11 pushes the tooth block 12 through the elastic force of the second spring 13, so that the tooth block 12 is engaged with the outer wall of the gear 5, and the gear 5 drives the driven wheel 2 to stop rotating, thereby achieving stability and improving the adjustment accuracy of the driven wheel 2.

[0027] In a preferred embodiment, a circular hole is formed on the outer wall of the pull rod 11 , and the diameter of the circular hole is the same as the diameter of the outer wall of the pull plate 8 .

[0028] In the above structure, by pulling the pull rod 11, the circular hole of the pull rod 11 is aligned with the bottom outer wall of the pull plate 8, and the pull plate 8 is pressed by external force, so that the pull plate 8 is compressed by the first spring 9 and inserted into the inner wall of the pull rod 11, so that during the use of the driven wheel 2, the tooth block 12 is separated from the outer wall of the gear 5 and is stored in the inner wall of the box body 4.

[0029] In a preferred embodiment, the outer wall of the limiting plate 10 is semi-arc-shaped, and two limiting plates 10 are distributed on the outer walls on both sides of the driven wheel 2 .

[0030] In the above structure, the Velcro is placed on the inner wall of the driven wheel 2, and part of the Velcro is wrapped around the outer wall of the driven wheel 2 using the groove of the driven wheel 2. The two sides of the Velcro are clamped by two limiting plates 10, so that the Velcro will not fall off during the equipment testing process.

[0031] In a preferred embodiment, one end of the third spring 16 is located on the outer wall of the limiting plate 10 , and the other end of the third spring 16 is located on the inner wall of the driven wheel 2 .

[0032] In the above structure, by passing Velcro of different widths through the slot and wrapping it around the outer wall of the driven wheel 2 or the rotating wheel 7, the Velcro is used to squeeze the limit plate 10, and the limit plate 10 squeezes the third spring 16 through the circular plate 15. The slot width can be changed according to the width of the Velcro, thereby increasing the scope of application.

[0033] Working principle: By placing the device on a plane, using external force to place the Velcro on the inner wall of the rotating wheel 7 and the driven wheel 2 to achieve stability, when the driven wheel 2 rotates, adjust the weight 18 to drive the connecting block 17 to contact the Velcro on the outer wall of the rotating wheel 7, and perform a rotation test. Place the top of the support rod 3 on the counterweight block to avoid constant changes in the center of gravity of the test wheel, keep the center of gravity consistent, and make the rotation more balanced. By placing the Velcro on the inner wall of the driven wheel 2, using the notch of the driven wheel 2 to wrap part of the Velcro around the outer wall of the driven wheel 2 or the rotating wheel 7, use the Velcro to squeeze the limit plate 10, and the limit plate 10 squeezes the third spring 16 through the circular plate 15. The width of the notch can be changed according to the width of the Velcro to increase the adaptability. The scope of use can be used to avoid the Velcro from falling off during the test, so that the Velcro will not fall off during the equipment testing, and the equipment testing accuracy is higher. When the equipment is finished using, the pull rod 11 is pulled by external force, and the pull rod 11 drives the tooth block 12 to resist the second spring 13 to form compression, so that the tooth block 12 slides on the inner wall of the box body 4, and the tooth block 12 is separated from the outer wall of the gear 5, so that the driven wheel 2 can rotate. The pull rod 11 is released by external force, and the pull rod 11 pushes the tooth block 12 through the elastic force of the second spring 13, so that the tooth block 12 is engaged with the outer wall of the gear 5, and the gear 5 drives the driven wheel 2 to stop rotating, achieving stability, avoiding accidental injury when people take the Velcro, thereby improving the adjustment accuracy of the driven wheel 2.

[0034] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fatigue testing device for a hook and loop fastener, comprising a main body (1), characterized in that: The outer wall of the main body (1) is rotatably connected to a rotating wheel (7), the outer wall of the main body (1) is rotatably connected to a connecting block (17), the outer wall of the connecting block (17) is fixedly mounted with a support rod (3), the inner wall of the support rod (3) is rotatably connected to a driven wheel (2), the outer wall of the driven wheel (2) is fixedly mounted with a gear (5), the outer wall of the gear (5) is mounted with a tooth block (12), the outer wall of the tooth block (12) is slidably connected to a box body (4), the inner wall of the box body (4) is slidably sleeved with a pull rod (11), and the inner wall of the box body (4) is fixedly mounted with a second spring (13), a support plate (6) is fixedly mounted on the outer wall of the main body (1), a pull plate (8) is slidably sleeved on the inner wall of the support plate (6), a first spring (9) is movably sleeved on the outer wall of the pull plate (8), a limiting rod (14) is slidably sleeved on the inner wall of the driven wheel (2), a limiting plate (10) is fixedly mounted on the outer edge of one end of the limiting rod (14), a circular plate (15) is fixedly mounted on the outer wall of the limiting rod (14), a third spring (16) is movably sleeved on the outer wall of the limiting rod (14), and a weight (18) is slidably connected to the outer wall of the connecting block (17).

2. The fatigue testing device for hook and loop fastener according to claim 1, characterized in that: The outer wall of the gear (5) is meshed with the outer wall of the tooth block (12); the inner wall of the box body (4) is provided with a square groove, and the outer wall of the square groove is matched with the outer wall of the tooth block (12).

3. The fatigue testing device for hook and loop fastener according to claim 2, characterized in that: One end of the second spring (13) is fixed to the outer wall of the tooth block (12), and the other end of the second spring (13) is fixed to the inner wall of the box body (4).

4. The fatigue testing device for hook and loop fastener according to claim 1, characterized in that: A circular hole is provided on the outer wall of the pull rod (11), and the diameter of the circular hole is the same as the diameter of the outer wall of the pull plate (8).

5. The fatigue testing device for hook and loop fastener according to claim 1, characterized in that: The outer wall of the limiting plate (10) is semi-arc-shaped, and the two limiting plates (10) are distributed on the outer walls of both sides of the driven wheel (2).

6. The fatigue testing device for hook and loop fastener according to claim 1, characterized in that: One end of the third spring (16) is located on the outer wall of the limiting plate (10), and the other end of the third spring (16) is located on the inner wall of the driven wheel (2).

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