Fracture early warning type rubber band

Abstract

The utility model relates to the field of rubber bands, and particularly discloses a fracture early warning type rubber band which comprises a rubber band body, a containing cavity is formed in the rubber band body, an indicating assembly is arranged in the containing cavity, the color of the indicating assembly is gradually deepened along with stretching of the rubber band body, and the cavity wall of the containing cavity is gradually thinned along with stretching of the rubber band body. Therefore, when a user observes the indicating assembly through the rubber band body, the color of the indicating assembly is gradually darkened, the user is reminded that the rubber band body is about to be broken before the rubber band body reaches the stretching limit, the user can loosen the rubber band body slightly at the moment, and the situation that the rubber band body is broken due to excessive stretching is avoided; the indication strip is in a strip shape made of polyurethane plastic, so that the indication strip has high pressure resistance in the radial direction, the smooth layer is a polytetrafluoroethylene coating, and the coating has high temperature resistance and excellent sliding performance, so that the indication strip can be used for reducing friction between the indication strip and the rubber band main body.

Description

Technical Field

[0001] The utility model relates to the field of rubber bands, in particular to a fracture warning type rubber band. Background Art

[0002] A rubber band is a short loop made of rubber and latex, generally used to tie things together. Since users cannot know the stretching limit of the rubber band, it is easy to stretch the rubber band beyond its stretching limit during daily use, causing the rubber band to break. This not only affects the normal bundling process, but the rubber band that is ejected after breaking is also likely to bounce onto the user, causing great inconvenience to the user. In addition, if the stretched length of the rubber band after bundling is near its stretching limit, it may break during subsequent transportation and handling, causing the bundled objects to scatter, and some fragile items may be broken.

[0003] Therefore, it is necessary to design a fracture warning type rubber band to alleviate the above technical problems. Utility Model Content

[0004] The purpose of the utility model is to provide a fracture warning type rubber band, which is used to overcome the above-mentioned defects in the prior art.

[0005] According to the utility model, a fracture warning type rubber band comprises a rubber band main body, a containing cavity is provided in the rubber band main body, and an indicating component whose color gradually darkens as the rubber band main body is stretched is arranged in the containing cavity.

[0006] Through the above technical solution, as the rubber band body is stretched, the wall of the accommodating cavity gradually becomes thinner, so that when the user observes the indicator component through the rubber band body, its color gradually becomes darker, thereby reminding the user that the rubber band body is about to break before the rubber band body reaches its stretching limit.

[0007] Preferably, the accommodating cavity is an annular cavity arranged along the annular track of the rubber band body, and the indicating component includes an indicating strip arranged along the annular cavity.

[0008] Through the above technical solution, as the rubber band body is stretched, the wall of the annular cavity becomes thinner, and the color of the indicator strip that appears through the wall of the annular cavity gradually changes.

[0009] Preferably, the indicator strip is in the shape of a strip made of elastic plastic, and when the rubber band body is in a relaxed state, two ends of the indicator strip abut against each other.

[0010] Through the above technical solution, the indicator strip made of elastic plastic can be kept from being stretched during the stretching process of the rubber band body, thereby reducing the deformation of the indicator strip and ensuring the color of the indicator strip is visible.

[0011] Preferably, a smooth layer is coated on the outer circumference of the indicator strip.

[0012] Through the above technical solution, the smooth layer can reduce the friction between the indicator strip and the inner wall of the annular cavity, thereby reducing the pulling on the smooth layer when the rubber band body is stretched.

[0013] Preferably, the accommodating cavity is a plurality of spherical cavities equidistantly distributed along the rubber band body, the spherical cavities are connected to diffusion cavities along both sides of the rubber band body, the indicating component includes a small indicating ball and a large indicating ball, and the small indicating ball and the large indicating ball are both filled with colored liquid.

[0014] Through the above technical solution, as the rubber band body is stretched, the spherical cavity is deformed, thereby squeezing the large indicator ball or the small indicator ball, causing the large indicator ball or the small indicator ball to deform. When the rubber band body is stretched close to the stretching limit of the rubber band body, the large indicator ball and the small indicator ball rupture, causing the liquid in the small indicator ball or the large indicator ball to diffuse into the diffusion cavity, and the color displayed on the rubber band body suddenly expands, thereby reminding the user.

[0015] Preferably, the small indicator ball and the large indicator ball are both made of plastic film.

[0016] Through the above technical solution, the small indicator ball and the large indicator ball made of plastic film are easy to break after being squeezed.

[0017] Preferably, the diameter of the spherical cavity is consistent with the diameter of the large indicator ball, and there is a gap between the inner side wall of the spherical cavity and the outer spherical surface of the small indicator ball.

[0018] Through the above technical solution, the large indicator ball with a larger diameter breaks first, and the small indicator ball with a smaller diameter breaks later, thereby realizing two reminders for the user and improving the reminder effect.

[0019] The beneficial effect of the utility model is that as the rubber band body is stretched, the wall of the accommodating cavity gradually becomes thinner, so that when the user observes the indicating component through the rubber band body, its color gradually becomes darker, thereby reminding the user that the rubber band body is about to break before the rubber band body reaches the stretching limit, so that the user can relax the rubber band body a little at this time to avoid the rubber band body from breaking due to excessive stretching. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is a cross-sectional view of the first embodiment of the utility model;

[0022] Figure 3 It is a structural schematic diagram of the accommodating cavity in the first embodiment of the utility model;

[0023] Figure 4 It is a cross-sectional view of the second embodiment of the utility model;

[0024] Figure 5 It is a structural schematic diagram of the accommodating cavity in the second embodiment of the utility model;

[0025] Figure 6 This utility model Figure 4 The enlarged schematic diagram of point B in the middle;

[0026] Figure 7 This utility model Figure 4 The enlarged schematic diagram at C in the middle;

[0027] Figure 8 This utility model Figure 5 Enlarged schematic diagram at point D in the middle.

[0028] In the figure:

[0029] 10. Rubber band body; 11. Annular cavity; 12. Spherical cavity; 13. Diffusion cavity; 20. Smooth layer; 21. Indicator strip; 30. Small indicator ball; 32. Large indicator ball. DETAILED DESCRIPTION

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of simplifying the description of the present invention, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in conjunction with the embodiments below. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the protection scope of the specific request of the utility model. As used in this article, the terms up and down and left and right are not limited to their strict geometric definitions, but include reasonable and inconsistent tolerances for machining or human errors. The specific features of the fracture warning rubber band are described in detail below:

[0032] First embodiment:

[0033] Reference Figure 1-Figure 3The utility model provides a fracture warning type rubber band, including a rubber band main body 10, a receiving cavity is opened in the rubber band main body 10, and an indicating component whose color gradually darkens as the rubber band main body 10 is stretched is arranged in the receiving cavity, and the receiving cavity is an annular cavity 11 arranged along the annular track of the rubber band main body 10, and the indicating component includes an indicating strip 21 arranged along the annular cavity 11. In this embodiment, the indicating strip 21 is a strip made of polyurethane plastic, and red pigment is added to the indicating strip 21 to make it appear red. The cross-section of the indicating strip 21 is circular, so that it has a higher compressive resistance in the radial direction. When the rubber band main body 10 is in a relaxed state, the two ends of the indicating strip 21 abut against each other, and a smooth layer 20 is coated on the outer periphery of the indicating strip 21. The smooth layer 20 is a polytetrafluoroethylene coating, which has high temperature resistance and excellent sliding performance, and can therefore be used to reduce the friction between the indicating strip 21 and the rubber band main body 10.

[0034] The molten rubber is poured into the mold to form two Figure 3 The half of the rubber band body 10 is shown, and then the indicator strip 21 is placed into one half of the annular cavity 11, and the two halves of the rubber band body 10 are bonded to each other by thermal bonding, that is, the surfaces of the two halves of the rubber band body 10 to be bonded are heated to the vulcanization temperature, and then the two halves of the rubber band body 10 are pressurized, so that the two halves of the rubber band body 10 are bonded to each other.

[0035] When the rubber band body 10 is used for binding, as the rubber band body 10 is stretched, the diameter of the rubber band body 10 decreases. Due to the support of the indicator strip 21, the wall of the annular cavity 11 gradually becomes thinner, so that the color of the indicator strip 21 appearing through the wall of the annular cavity 11 gradually becomes darker, thereby reminding the user that the deformation of the rubber band body 10 is gradually approaching the stretching limit, thereby avoiding the user from over-stretching the rubber band body 10 and causing the rubber band body 10 to break.

[0036] After the rubber band body 10 is tied, the rubber band body 10 is relaxed to the initial state, and the indicator strip 21 is re-accommodated into the annular cavity 11 for subsequent reuse.

[0037] Second embodiment:

[0038] Reference Figure 4-Figure 8 The difference from the first embodiment is that the accommodating cavity is a plurality of spherical cavities 12 equidistantly distributed along the rubber band body 10, and the spherical cavities 12 are connected to the diffusion cavities 13 on both sides of the rubber band body 10. The indicating assembly includes a small indicating ball 30 and a large indicating ball 32. In this embodiment, the small indicating ball 30 and the large indicating ball 32 are filled with red liquid. The small indicating ball 30 and the large indicating ball 32 are both made of plastic film. The diameter of the spherical cavity 12 is consistent with the diameter of the large indicating ball 32, and there is a gap between the inner wall of the spherical cavity 12 and the outer spherical surface of the small indicating ball 30.

[0039] First, the molten rubber material is injected into the mold. The shape of the mold cavity is consistent with the shape of half of the rubber band body 10. Before the rubber material solidifies, the mold consistent with the shape of the spherical cavity 12 and the diffusion cavity 13 is placed in the rubber material to form a Figure 5 The rubber band body 10 is half as shown, and then the small indicator ball 30 and the large indicator ball 32 are respectively placed in the spherical cavity 12 of one half of the rubber band body 10, and then the other half of the rubber band body 10 is bonded to the half of the rubber band body 10 with the small indicator ball 30 and the large indicator ball 32 by hot bonding.

[0040] As the rubber band body 10 is stretched, the spherical cavity 12 is deformed to squeeze the large indicator ball 32 first. When the stretching deformation of the rubber band body 10 approaches its stretching limit, the large indicator ball 32 ruptures, causing the red liquid inside it to quickly diffuse into the diffusion cavity 13, thereby causing the red color that penetrates the rubber band body 10 to quickly expand, thereby reminding the user that the stretching deformation of the rubber band body 10 is about to approach its stretching limit.

[0041] When the stretching deformation of the rubber band body 10 reaches the stretching limit, the small indicator ball 30 is squeezed and ruptured, so that the red liquid in the small indicator ball 30 quickly diffuses into the diffusion chamber 13, thereby giving the user a second reminder, thereby improving the warning effect of the rubber band.

[0042] It is clear to those skilled in the art that various modifications to the above embodiments can be made without departing from the overall spirit and concept of the present invention. All of them fall within the protection scope of the present invention. The protection scheme of the present invention shall be subject to the claims attached to the present invention.

Claims

1. A fracture warning rubber band, comprising a rubber band body (10), characterized in that: A receiving cavity is provided in the rubber band body (10), and an indicating component whose color gradually darkens as the rubber band body (10) is stretched is provided in the receiving cavity; The accommodating cavity is a plurality of spherical cavities (12) equidistantly distributed along the rubber band body (10), and the spherical cavities (12) are connected to diffusion cavities (13) along both sides of the rubber band body (10). The indicating component comprises a small indicating ball (30) and a large indicating ball (32), and the small indicating ball (30) and the large indicating ball (32) are both filled with colored liquid.

2. A fracture warning rubber band according to claim 1, characterized in that: The accommodating cavity may also be an annular cavity (11) arranged along the annular track of the rubber band body (10), and the indicating component may also be an indicating strip (21) arranged along the annular cavity (11).

3. A fracture warning rubber band according to claim 2, characterized in that: The indicator strip (21) is in the shape of a strip made of elastic plastic, and when the rubber band body (10) is in a relaxed state, the two ends of the indicator strip (21) abut against each other.

4. A fracture warning rubber band according to claim 3, characterized in that: The outer periphery of the indicator strip (21) is coated with a smooth layer (20).

5. The fracture warning rubber band according to claim 1, characterized in that: The small indicator ball (30) and the large indicator ball (32) are both made of plastic film.

6. The fracture warning rubber band according to claim 5, characterized in that: The diameter of the spherical cavity (12) is consistent with the diameter of the large indicator ball (32), and there is a gap between the inner side wall of the spherical cavity (12) and the outer spherical surface of the small indicator ball (30).

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