Sofa dust cover with elastic band

Abstract

The utility model discloses a sofa dust cover with an elastic band, comprising: a cover body, a joint groove formed between a sofa seat surface and a backrest part; the bag is fixedly connected to the portion, corresponding to the joint groove, of the cover body, non-Newtonian fluid is packaged in the bag, and the non-Newtonian fluid is configured to be changed in rheological property when subjected to shear force; the magnetic attraction assembly is embedded in the joint groove and is in magnetic attraction fit with the bag; the limiting strip is arranged on the edge of the opening of the joint groove; two ends of the elastic piece are respectively connected with the bag and the mask body; when the cover body is displaced under the action of external force, the elastic piece is stretched and transmits tensile force to the bag; the bag is in extrusion contact with the limiting strip under the action of pulling force, so that the non-Newtonian fluid generates a shear thickening effect; and the bag is anchored in the joint groove due to the increase of the viscosity of the fluid, so that displacement resistance is formed. Through cooperation of the non-Newtonian fluid and other structures, the shear thickening fluid is rapidly thickened by external force to form an anchoring effect, displacement is stopped immediately, fluidity is recovered after the external force is removed, and use is not affected.

Description

Technical Field

[0001] This utility model particularly relates to a sofa dust cover with an elastic band. Background Technology

[0002] Sofa dust covers are widely used in homes and commercial spaces to prevent dust and stains from contaminating sofa surfaces. However, traditional dust cover fixing methods have many drawbacks. Elastic bands or straps easily loosen, causing the dust cover to shift and fall off. While Velcro or snaps are relatively secure, they require manual adjustment and their adhesiveness decreases after repeated use. Furthermore, these fixing methods cannot adapt to the slight deformations caused by stress during sofa use, leading to localized lifting or piling of the dust cover. Although improvements have been made in recent years using magnetic structures to enhance the fixing effect, relying solely on magnetic force can still result in the dust cover being pulled off under external force. Moreover, magnetic structures are often located at the edges, failing to effectively prevent the dust cover from slipping at the joint groove (the joint between the sofa seat and backrest). Additionally, they lack a dynamic response mechanism, failing to instantly strengthen the fixing force when the dust cover begins to shift. Therefore, there is an urgent need for a dust cover technology that can automatically adapt to sofa deformation and dynamically enhance the fixing effect to solve the problems of easy shifting and frequent adjustments required by traditional solutions, meeting users' needs for stability and convenience in dust cover fixing. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a sofa dust cover with an elastic band.

[0004] To solve the aforementioned technical problems, this utility model adopts the following technical solution:

[0005] A sofa dust cover with an elastic band, comprising:

[0006] A cover that covers the seat and backrest of a sofa, with a joint groove formed between the seat and backrest.

[0007] A bag is fixedly connected to the cover corresponding to the joint groove. The bag contains a non-Newtonian fluid, which is configured to change its rheological properties when subjected to shear force.

[0008] A magnetic attraction component is embedded in the engagement groove to form a magnetic attraction with the bag;

[0009] A limiting strip is provided at the opening edge of the engagement groove;

[0010] An elastic element, with its two ends connected to the pouch and the cover, respectively;

[0011] When the cover is displaced by an external force: the elastic element is stretched and transmits the tension to the bag; the bag is squeezed and contacts the limiting strip under the tension, causing the non-Newtonian fluid to produce a shear thickening effect; the bag is anchored in the joint groove due to the increase in fluid viscosity, forming displacement resistance.

[0012] Preferably, the limiting strip has multiple barb structures on the side facing the pouch.

[0013] Preferably, the elastic element is an elastic band.

[0014] Preferably, the inner wall of the pouch is provided with staggered micro protrusions, the height of which is 0.1-0.3 mm and the spacing between which is 0.5-1 mm.

[0015] Preferably, the longitudinal section of the barb structure is serrated.

[0016] The beneficial effects of this utility model are:

[0017] This utility model of a sofa dust cover achieves significant benefits through the synergistic effect of elastic elements, a bladder, non-Newtonian fluid, magnetic components, and limiting strips: it automatically adapts to sofa deformation, dynamically enhancing the fixing effect and solving the problems of traditional dust covers being prone to displacement and requiring frequent adjustments; the shear-thickening fluid rapidly thickens under external force, forming an anchoring effect that immediately prevents displacement and restores fluidity after the external force is removed, without affecting use; the barbed structure of the limiting strip and the micro-protrusion design on the inner wall of the bladder further enhance the fixing effect and stability; the structure is simple and easy to implement, and has good market application prospects. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the structure of a sofa dust cover with an elastic band according to this application. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of a sofa dust cover with an elastic band according to this application. Figure 2 ;

[0021] Figure 3 For the purposes of this application Figure 2 A magnified view of part A in the image. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0023] The orientation shown in the accompanying drawings should not be construed as limiting the specific protection scope of this utility model, but is only for reference and understanding of preferred embodiments. The product components shown in the drawings can be changed in position, increased in number, or simplified in structure.

[0024] The “connection” described in the specification and the “connection” relationship between the components shown in the accompanying drawings can be understood as a fixed connection, a detachable connection, or a connection that forms an integral unit; it can be a direct connection or a connection through an intermediate medium. Those skilled in the art can understand the connection relationship according to the specific circumstances and can derive different implementation methods such as screwing, riveting, welding, snap-fitting, or embedding to suitably replace the connection.

[0025] The directional terms such as up, down, left, right, top, and bottom mentioned in the instruction manual and the directions shown in the attached drawings indicate that the components can directly contact each other or contact each other through other features; for example, "up" can mean directly above or diagonally above, or it simply means above other objects; other directions can be understood by analogy.

[0026] The materials used to manufacture solid-shaped parts as shown in the specification and drawings may be metallic, non-metallic, or other synthetic materials. The machining processes used for solid-shaped parts may include stamping, forging, casting, wire cutting, laser cutting, injection molding, CNC milling, 3D printing, machining, etc. Those skilled in the art may adapt or combine the above materials and manufacturing processes according to different processing conditions, costs, and precision requirements.

[0027] A sofa dust cover with an elastic band, see reference. Figures 1-3 ,include:

[0028] A cover 101 covers the sofa seat 1-1 and backrest 1-2, and a joint groove 202 is formed between the sofa seat 1-1 and the backrest 1-2.

[0029] A bag 102 is fixedly connected to the cover 101 corresponding to the joint groove 202. The bag 102 contains a non-Newtonian fluid 103, which is configured to change its rheological properties when subjected to shear force.

[0030] The magnetic component 201 is embedded in the engagement groove 202 and forms a magnetic attraction with the bag 102;

[0031] A limiting strip 203 is provided at the opening edge of the engagement groove 202;

[0032] The elastic element 301 is connected at both ends to the pouch 102 and the cover 101, respectively.

[0033] When the cover 101 is displaced by an external force: the elastic element 301 is stretched and transmits the tension to the bag 102; the bag 102 is squeezed and contacts the limiting strip 203 under the tension, causing the non-Newtonian fluid 103 to produce a shear thickening effect; the bag 102 is anchored in the joint groove 202 due to the increase in fluid viscosity, forming a displacement resistance.

[0034] Furthermore, the limiting strip 203 is provided with a plurality of barb structures 204 on the side facing the pouch 102.

[0035] Furthermore, the elastic element 301 is an elastic band.

[0036] Furthermore, the inner wall of the pouch 102 is provided with staggered micro protrusions 103a, the height of which is 0.1-0.3mm and the spacing is 0.5-1mm.

[0037] Furthermore, the longitudinal section of the barb structure 204 is serrated.

[0038] The working principle of this utility model is as follows:

[0039] The sofa dust cover in this embodiment includes the following key components:

[0040] Cover 101: Cover 101 covers the sofa seat 1-1 and backrest 1-2, effectively protecting the sofa from dust and stains. A groove 202 is formed between the sofa seat 1-1 and backrest 1-2 to accommodate and secure other components.

[0041] Pouch 102: Pouch 102 is fixedly connected to the cover 101 corresponding to the engagement groove 202 (e.g., Figure 1 As shown, Figure 1 The dotted line in the drawing indicates the location where the pouch 102 is installed. The pouch 102 contains a non-Newtonian fluid 103, which exhibits good fluidity under static conditions and a viscosity of 1-10 Pa·s, allowing the pouch 102 to maintain flexible deformation without affecting the normal use and comfort of the sofa. When the pouch 102 is compressed by the limiting strip 203, generating a shearing effect, the viscosity of the non-Newtonian fluid increases to more than 50 times its static state within 0.2-0.5 seconds, reaching 500-1000 Pa·s, forming a near-solid-state anchoring effect that immediately prevents the dust cover from shifting. After the external force is removed, the fluid regains its fluidity within 1-3 seconds, preventing permanent hardening and ensuring the dust cover can continue to function normally.

[0042] Non-Newtonian fluid 103: This fluid is a shear-thickening fluid. As Example 1, non-Newtonian fluid 103 can be achieved using a liquid matrix and nanoparticles. The liquid matrix uses PEG with a molecular weight of 400-600, which has moderate fluidity and compatibility, ensuring that the fluid remains soft when static and does not affect the seating comfort. The nanoparticles are hydrophobically modified silica nanoparticles. The particle size is 20-50 nm. These nanoparticles effectively prevent aggregation, ensuring long-term fluid stability while providing optimal shear thickening effect. Excessively large particles tend to settle, while excessively small particles have a weaker thickening effect. With this material configuration, the fluid can rapidly thicken under shear force, instantly preventing dust cover displacement, and quickly regain its fluidity after the external force is removed.

[0043] Magnetic suction component 201: The magnetic suction component 201 is embedded in the engaging groove 202 and forms a magnetic attraction with the bag 102. This design not only enhances the fixing effect of the dust cover, but also prevents the dust cover from being torn off by external force to a certain extent.

[0044] Limiting strip 203: The limiting strip 203 is provided at the opening edge of the connecting groove 202 to limit the displacement of the bag 102. The limiting strip 203 has multiple barb structures 204 on the side facing the bag 102. The longitudinal section of the barb structure 204 is serrated, which can effectively enhance the friction between the bag 102 and the limiting strip 203, and further improve the fixing effect of the dust cover.

[0045] Elastic component 301: Elastic component 301 is an elastic band, with its two ends connected to the pouch 102 and the cover 101, respectively. The elastic band has good elasticity, which can provide stable tension when the dust cover is subjected to external force, and quickly return to its original shape after the external force is removed, ensuring that the dust cover always fits tightly against the sofa surface.

[0046] Micro-protrusions 103a: To further improve the fixation effect of the dust cover, the inner wall of the bag 102 is provided with staggered micro-protrusions 103a. The height of the micro-protrusions is 0.1-0.3 mm, and the spacing is 0.5-1 mm. These micro-protrusions 103a can increase the friction between the inner wall of the bag 102 and the non-Newtonian fluid 103, so that the fluid undergoes more uniform rheological changes when subjected to shear force, thereby further improving the fixation effect of the dust cover.

[0047] When the sofa dust cover is placed on the sofa, the cover body 101 fits tightly against the seat and backrest sections 1-2, while the pocket 102 is located within the joint groove 202 between the seat and backrest. The non-Newtonian fluid 103 encapsulated within the pocket 102 exhibits liquid properties under static conditions, with a low viscosity of 1-10 Pa·s, giving the pocket 102 good flexibility to adapt to the shape of the sofa and maintain comfort. At this time, the magnetic assembly 201 and the pocket 102 form a magnetic attraction, providing basic fixing force for the dust cover.

[0048] When a user sits on a sofa or gets up, the dust cover 101 may be displaced by external forces. At this time, the elastic element 301 is stretched, generating elastic tension, which is transmitted to the pouch 102. As the pouch 102 is under tension, it comes into compressive contact with the limiting strip 203. The barb structure 204 on the limiting strip 203 further enhances the friction between the pouch 102 and the limiting strip 203.

[0049] Under compression, the non-Newtonian fluid 103 inside the bag 102 is subjected to shear force, and its viscosity rapidly increases to more than 50 times its static state within a short period of 0.2-0.5 seconds, reaching 500-1000 Pa·s, forming a near-solid-state anchoring effect. This rapid thickening characteristic allows the bag 102 to be firmly anchored within the joint groove 202, thereby generating strong displacement resistance and effectively preventing further slippage of the dust cover.

[0050] When the external force is removed, the non-Newtonian fluid 103 regains its fluidity within 1-3 seconds, the bag 102 regains its flexibility, and the dust cover continues to fit tightly against the sofa surface, without affecting the normal use of the sofa. At the same time, the elastic restoring force of the elastic element 301 returns the dust cover to its initial position, ensuring that it is always in the best protective state.

[0051] Furthermore, the micro-protrusions 103a on the inner wall of the pouch 102 further increase the friction between the pouch 102 and the non-Newtonian fluid, allowing the fluid to undergo more uniform rheological changes when subjected to shear force, thus further improving the fixation effect of the dust cover. This dynamic response mechanism can not only immediately prevent the displacement of the dust cover, but also automatically adapt when the sofa deforms, ensuring that the dust cover is always firmly fixed to the sofa.

[0052] This utility model of a sofa dust cover achieves significant benefits through the synergistic effect of elastic elements, a bladder, non-Newtonian fluid, magnetic components, and limiting strips: it automatically adapts to sofa deformation, dynamically enhancing the fixing effect and solving the problems of traditional dust covers being prone to displacement and requiring frequent adjustments; the shear-thickening fluid rapidly thickens under external force, forming an anchoring effect that immediately prevents displacement and restores fluidity after the external force is removed, without affecting use; the barbed structure of the limiting strip and the micro-protrusion design on the inner wall of the bladder further enhance the fixing effect and stability; the structure is simple and easy to implement, and has good market application prospects.

[0053] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made to the present invention without departing from the principles and spirit of the present invention as defined by the claims. Therefore, the detailed description of the embodiments in this disclosure is for explanation only and not for limiting the present invention, but rather the scope of protection is defined by the content of the claims.

Claims

1. A sofa dust cover with elastic elastic band, characterized in that, include: A cover (101) covers the sofa seat (1-1) and backrest (1-2), and a joint groove (202) is formed between the sofa seat (1-1) and the backrest (1-2); A bag (102) is fixedly connected to the cover (101) corresponding to the joint groove (202). The bag (102) contains a non-Newtonian fluid (103), which is configured to change its rheological properties when subjected to shear force. A magnetic attraction component (201) is embedded in the engagement groove (202) and forms a magnetic attraction with the bag (102); A limiting strip (203) is provided at the opening edge of the engagement groove (202); An elastic element (301) is connected at both ends to the pouch (102) and the cover (101); When the cover (101) is displaced by an external force: the elastic element (301) is stretched and transmits the tension to the bag (102); the bag (102) is squeezed and contacts the limiting strip (203) under the tension, causing the non-Newtonian fluid (103) to produce a shear thickening effect; the bag (102) is anchored in the joint groove (202) due to the increase in fluid viscosity, forming a displacement resistance.

2. The dust cover for a sofa with elastic webbing according to claim 1, characterized in that The limiting strip (203) has multiple barb structures (204) on the side facing the pouch (102).

3. The dust cover for a sofa with elastic webbing according to claim 1, characterized in that, The elastic element (301) is an elastic band.

4. A sofa dust cover with an elastic band according to claim 1, characterized in that, The inner wall of the pouch (102) is provided with staggered micro protrusions (103a), the height of which is 0.1-0.3 mm and the spacing is 0.5-1 mm.

5. The sofa drape of claim 2, wherein, The longitudinal section of the barbed structure (204) is serrated.

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