Independent elastic unit and elastic pad

Abstract

The present invention provides an independent elastic unit, comprising: an upper cover, a bottom cover, a spring, and a fabric sleeve. The upper edge of the fabric sleeve is fixedly connected to the side of the upper cover facing away from the bottom cover, and the lower edge of the fabric sleeve is connected to the side of the bottom cover facing away from the upper cover, so that the upper cover, the bottom cover and the fabric sleeve define a cavity for accommodating the spring; the upper end and the lower end of the spring are respectively fitted and fixed to a first annular groove and a second annular groove provided on the sides of the upper cover and the bottom cover that are opposite to each other; and the side of the bottom cover facing away from the upper cover is provided with a connecting member connected to a bottom plate. The present invention further provides an elastic pad, comprising a bottom plate, a soft pad layer, and the elastic units as described above; connection engagement members engaged with the bottom covers of the elastic units are arranged in an array on the bottom plate, so as to arrange the elastic units on the bottom plate in an array; and the soft pad layer is arranged on the side of the elastic units away from the bottom plate.

Description

An independent elastic unit and elastic pad

[0001] Cross-references to related applications

[0002] This application claims priority based on Chinese Patent Application No. 2025100701480, filed on January 16, 2025, entitled "An Elastic Component, Elastic Cushion, Sofa and Folding Sofa Bed", the contents of which are incorporated herein by reference.

[0003] This application claims priority based on Chinese Patent Application No. 202511218833X, filed on August 28, 2025, entitled "A Freestanding Elastic Unit and Elastic Pad", the contents of which are incorporated herein by reference. Technical Field

[0004] This invention relates to a household product, and more particularly to an elastic pad. Background Technology

[0005] Spring mattresses, sofa beds, and other furniture are essential parts of people's lives. Most existing beds and sofa beds are equipped with spring mattresses. Spring mattresses have a certain degree of elasticity, providing support and comfort compared to hard mattresses when people lie on them.

[0006] Current elastic pads are formed by connecting multiple spring components together. A common connection method is to have male and female ends on the spring components, relying on the interlocking of these ends for connection. However, because spring components tend to sink under stress during use, existing technology connects them in both width and height directions to prevent tilting. This allows the spring components to remain vertically oriented when sinking under stress, thanks to the restraint of surrounding spring components. However, this introduces the problem of requiring considerable effort to install and remove the spring components. Summary of the Invention

[0007] The main technical problem to be solved by the present invention is to provide an independent elastic unit, in which the elastic unit is only connected to the base and adjacent elastic units are not connected to each other, thereby increasing the convenience of disassembly and assembly.

[0008] To solve the above-mentioned technical problems, the present invention provides an independent elastic unit, comprising: an upper cover, a bottom cover, a spring, and a cloth sleeve;

[0009] The upper edge of the fabric cover is fixedly connected to the side of the upper cover facing away from the bottom cover, and the lower edge of the fabric cover is connected to the side of the bottom cover facing away from the upper cover, so that the upper cover, the bottom cover and the fabric cover define a cavity for accommodating the spring. The upper end and the lower end of the spring are respectively engaged and fixed with the first annular groove and the second annular groove provided on the opposite side of the upper cover and the bottom cover.

[0010] The bottom cover has a connector on the side opposite to the top cover that connects to the bottom plate.

[0011] In a preferred embodiment: a third annular groove is provided on the side of the bottom cover opposite to the top cover, and an elastic piece is provided on the lower edge of the fabric cover to engage with the third annular groove. The lower edge of the fabric cover passes around the bottom cover and engages with the third annular groove through the elastic piece.

[0012] In a preferred embodiment: the upper cover includes a ring and a cover, the ring being disposed on the side of the cover facing away from the bottom cover; the upper edge of the fabric cover passes around the ring and is fixedly connected to the inner periphery of the ring.

[0013] In a preferred embodiment: the ring body is provided with a slot for connecting to the cover body on the side facing the cover body, and the cover body is provided with a protrusion that engages with the slot.

[0014] In a preferred embodiment: the cover body is provided with the first annular groove on the side facing the bottom cover.

[0015] In a preferred embodiment: the upper cover and the bottom cover are respectively provided with snap-fit ​​holes that cooperate with the pull strap, and the pull strap is provided with snap-fit ​​portions at intervals along the length direction; by snapping the snap-fit ​​portions with the snap-fit ​​holes to change the distance between the upper cover and the bottom cover, the elastic unit is placed in the use state or the storage state or the preload of the elastic unit is changed.

[0016] In a preferred embodiment: the upper cover is a ring, and the ring has a first ring groove on the side facing the bottom cover. The upper edge of the fabric cover passes around the ring and is fixedly connected to the inner periphery of the ring.

[0017] In a preferred embodiment: the bottom cover is recessed on the side away from the top cover towards the top cover to form a cavity as the connector.

[0018] In a preferred embodiment: the inner wall of the cavity is provided with L-shaped snap-fit ​​portions spaced along the axial direction.

[0019] In a preferred embodiment, the ratio of the outer diameter to the height of the elastic element is between 1:1 and 1:3.

[0020] The present invention also provides an elastic pad, characterized in that it includes a base plate, a cushion layer and an elastic unit as described above;

[0021] The base plate is provided with an array of connecting fittings that mate with the bottom cover of the elastic unit, so as to arrange the elastic unit array on the base plate, and the elastic pad is arranged on the side of the elastic unit away from the base plate.

[0022] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0023] This invention provides an independent elastic unit that is connected only to a base. The base provides support and limits to prevent the elastic unit from shifting or misaligning under pressure. The upper and lower edges of the fabric cover are fixedly connected to the side of the upper cover facing away from the bottom cover, and to the side of the bottom cover facing away from the upper cover, respectively. This requires the fabric cover to bypass the upper and bottom covers, covering their sides, so that only the fabric cover is visible on the sides of the elastic unit. This increases the uniformity of the elastic unit's appearance and makes it more aesthetically pleasing. Attached Figure Description

[0024] Figure 1 is a schematic diagram of the elastic unit in preferred embodiment 1 of the present invention;

[0025] Figure 2 is a cross-sectional view of the elastic unit in preferred embodiment 1 of the present invention;

[0026] Figure 3 is an exploded view of the elastic unit in preferred embodiment 1 of the present invention;

[0027] Figure 4 is a schematic diagram of the bottom cover in preferred embodiment 1 of the present invention;

[0028] Figure 5 is a schematic diagram of the bottom cover from another angle in preferred embodiment 1 of the present invention;

[0029] Figure 6 is a schematic diagram of the connection between the elastic unit and the base plate in preferred embodiment 1 of the present invention;

[0030] Figure 7 is a schematic diagram of the elastic pad in preferred embodiment 1 of the present invention;

[0031] Figure 8 is a cross-sectional view of the elastic unit in preferred embodiment 2 of the present invention;

[0032] Figure 9 is an exploded view of the elastic unit in preferred embodiment 2 of the present invention;

[0033] Figure 10 is a schematic diagram of the bottom cover in preferred embodiment 2 of the present invention;

[0034] Figure 11 is a schematic diagram of the bottom cover from another angle in preferred embodiment 2 of the present invention;

[0035] Figure 12 is a schematic diagram of the connection between the elastic unit and the base plate in preferred embodiment 2 of the present invention;

[0036] Figure 13 is a cross-sectional view of the elastic unit in the preferred embodiment 3 of the present invention;

[0037] Figure 14 is a schematic diagram of the elastic unit in preferred embodiment 4 of the present invention. Detailed Implementation

[0038] To make the technical solution and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific examples. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art fall within the scope defined by the appended claims.

[0039] Example 1

[0040] Referring to Figures 1-7, this embodiment provides an independent elastic unit, including: an upper cover 1, a bottom cover 2, a spring 3, and a cloth cover 4;

[0041] The upper edge of the fabric cover 4 is fixedly connected to the side of the upper cover 1 facing away from the bottom cover 2, and the lower edge of the fabric cover 4 is connected to the side of the bottom cover 2 facing away from the upper cover 1, so that the upper cover 1, the bottom cover 2 and the fabric cover 4 define a cavity for accommodating the spring 3. The upper end and the lower end of the spring 3 are respectively engaged and fixed with the first annular groove 11 and the second annular groove 21 provided on the opposite side of the upper cover 1 and the bottom cover 2.

[0042] The bottom cover 2 has a connector on the side opposite to the top cover 1 that connects to the bottom plate 5.

[0043] In the aforementioned independent elastic unit, the upper and lower edges of the fabric cover 4 are fixedly connected to the side of the upper cover 1 facing away from the bottom cover 2, and the bottom cover 2 is connected to the side of the upper cover 1 facing away from the bottom cover 2. This means the fabric cover 4 needs to go around the upper cover 1 and the bottom cover 2 to cover their sides, making only the fabric cover 4 visible on the sides of the elastic unit. This increases the uniformity of the elastic unit's appearance and makes it more aesthetically pleasing.

[0044] In this embodiment, to secure the lower edge of the fabric cover 4, a third annular groove 22 is provided on the side of the bottom cover 2 facing away from the top cover 1. An elastic piece (not shown) is provided on the lower edge of the fabric cover 4 to engage with the third annular groove 22. The lower edge of the fabric cover 4 passes around the bottom cover 2 and is engaged with the third annular groove 22 via the elastic piece. The elastic piece increases the rigidity of the lower edge of the fabric cover 4 and also increases the connection strength after the elastic piece engages with the third annular groove 22.

[0045] Specifically, in this embodiment, the upper cover 1 includes a ring 12 and a cover 13. The ring 12 is disposed on the side of the cover 13 facing away from the bottom cover 2; the cover 13 has a first annular groove 11 on the side facing the bottom cover 2. The upper edge of the fabric sleeve 4 passes around the ring 12 and is fixedly connected to the inner periphery of the ring 12. After dividing the upper cover 1 into the cover 13 and the ring 12, the ring 12 is responsible for fixing to the upper edge of the fabric sleeve 4, and the cover 13 is responsible for connecting the spring 3 and covering the opening in the ring 12, so that the spring 3 is not visible in appearance, further increasing the consistency of appearance. In order to connect the cover 13 and the ring 12, the side of the ring 12 facing the cover 13 is provided with a slot 121 for connecting to the cover 13, and the cover 13 is provided with a protrusion 131 for inserting into the slot 121.

[0046] Furthermore, the upper cover 1 and the bottom cover 2 are respectively provided with snap-fit ​​holes 132 and 23 that cooperate with the pull strap. Specifically, the snap-fit ​​holes 132 and 23 are respectively provided on the cover body 13 and the bottom cover 2, and the pull strap is provided with snap-fit ​​portions at intervals along its length. By snapping different snap-fit ​​portions with the snap-fit ​​holes 132 and 23, the distance between the upper cover 1 and the bottom cover 2 can be changed, thereby placing the elastic unit in a working state, a stored state, or changing the preload of the elastic unit. For example, two snap-fit ​​portions are provided on the pull strap. The lower snap-fit ​​portion is kept in a snap-fit ​​state with the snap-fit ​​hole 23 of the bottom cover 2, while the upper snap-fit ​​portion can be snapped with the snap-fit ​​hole 132 of the upper cover 1 or not. When not snapped, the elastic unit is in a working state; when snapped, the elastic unit is compressed and in a stored state. The number of snap-fit ​​parts can be increased to make the distance between the top cover 1 and the bottom cover 2 adjustable. After adjusting the distance between the top cover 1 and the bottom cover 2, the preload of the spring 3 is also changed. Therefore, the preload of the elastic unit can be adjusted to adjust the hardness of the elastic pad.

[0047] In this embodiment, the bottom cover 2 is recessed on the side away from the top cover 1, forming a cavity 24 that serves as the connector. Correspondingly, the base plate 5 is arrayed with connecting fittings that mate with the bottom cover 2 of the elastic unit. The connecting fittings are protrusions 51 that mate with the cavity 24. The elastic unit is fixed by the friction between the protrusion 51 and the inner wall of the cavity 24, thus arranging the elastic unit array on the base plate 5. Then, the elastic pad 6 is placed on the side of the elastic unit away from the base plate 5. This completes the installation of the elastic pad. The base plate 5 can be a one-piece base plate or a base plate 5 spliced ​​from base plate units. The spliced ​​base plate 5 can be expanded according to the required size. Through the limiting effect between the protrusion 51 and the cavity 24, the elastic unit can only move vertically up and down without tilting, ensuring user comfort during the use of the elastic pad.

[0048] In this embodiment, the ratio of the outer diameter to the height of the elastic unit is between 1:1 and 1:3, preferably 1:2. This limits the height of the elastic unit, preventing it from becoming too tall and causing the independent elastic unit to shift axially and tilt under stress.

[0049] Example 2

[0050] Referring to Figures 8-12, the difference between this embodiment and Embodiment 1 is that the inner wall of the cavity 24 is provided with first L-shaped snap-fit ​​portions 25 spaced apart along the axial direction. Correspondingly, the side wall of the protrusion 51 of the bottom plate 5 is also provided with second L-shaped snap-fit ​​portions 5 as connecting parts, and the openings of the two L-shaped snap-fit ​​portions are arranged facing each other. During installation, the two L-shaped snap-fit ​​portions are first staggered, the cavity 24 of the bottom cover 2 is placed outside the protrusion 51, and then the elastic unit is rotated so that the two L-shaped snap-fit ​​portions interlock with each other through the openings to complete the installation.

[0051] Example 3

[0052] Referring to Figure 13, the difference between this embodiment and Embodiment 1 is that the cover 13 is made of elastic rubber, which makes the upper surface of the elastic unit more comfortable to the touch and can increase the comfort of the user lying on the elastic pad.

[0053] Example 4

[0054] Referring to Figure 14, this embodiment eliminates the cover 13, retaining only the ring 12. The ring 12 then serves to both secure the upper edge of the fabric sleeve 4 and connect to the spring 3. Therefore, the ring 12 has a first annular groove 11 on the side facing the bottom cover 2, and the upper edge of the fabric sleeve 4 passes around the ring 12 and is fixedly connected to the inner periphery of the ring 12. The disadvantage is that eliminating the cover 13 makes it impossible to cover the opening of the ring 12; when viewed from above, the spring 3 can be seen through the opening of the ring 12, making it impossible to conceal the spring 3.

[0055] The above is only one specific embodiment of the present invention, but the design concept of the present invention is not limited thereto. Any non-substantial modifications made to the present invention using this concept shall be deemed as infringing the protection scope of the present invention. Industrial applicability

[0056] This invention provides an independent elastic unit that is connected only to a base. The base provides support and limits to prevent the elastic unit from shifting or misaligning under pressure. The upper and lower edges of the fabric cover are fixedly connected to the side of the upper cover facing away from the bottom cover, and to the side of the bottom cover facing away from the upper cover, respectively. This requires the fabric cover to bypass the upper and bottom covers, covering their sides, so that only the fabric cover is visible on the sides of the elastic unit. This increases the uniformity of the elastic unit's appearance, making it more aesthetically pleasing and possessing good industrial practicality.

Claims

1. An independent elastic unit, characterized in that... include: Top cover, bottom cover, spring, and fabric cover; The upper edge of the fabric cover is fixedly connected to the side of the upper cover facing away from the bottom cover, and the lower edge of the fabric cover is connected to the side of the bottom cover facing away from the upper cover, so that the upper cover, the bottom cover and the fabric cover define a cavity for accommodating the spring. The upper end and the lower end of the spring are respectively engaged and fixed with the first annular groove and the second annular groove provided on the opposite side of the upper cover and the bottom cover. The bottom cover has a connector on the side opposite to the top cover that connects to the bottom plate.

2. The independent elastic unit according to claim 1, characterized in that: The bottom cover is provided with a third annular groove on the side opposite to the top cover. The lower edge of the fabric cover is provided with an elastic piece that engages with the third annular groove. The lower edge of the fabric cover passes around the bottom cover and engages with the third annular groove through the elastic piece.

3. The independent elastic unit according to claim 1, characterized in that: The upper cover includes a ring and a cover body. The ring is disposed on the side of the cover body facing away from the bottom cover. The upper edge of the fabric cover passes around the ring and is fixedly connected to the inner periphery of the ring.

4. The independent elastic unit according to claim 3, characterized in that: The ring body has a slot for connecting to the cover body on the side facing the cover body, and the cover body has a protrusion that engages with the slot.

5. The independent elastic unit according to claim 3, characterized in that: The first annular groove is provided on the side of the cover facing the bottom cover.

6. The independent elastic unit according to claim 1, characterized in that: The upper cover and the bottom cover are respectively provided with snap-fit ​​holes that cooperate with the pull strap, and the pull strap is provided with snap-fit ​​parts at intervals along the length direction; by snapping the snap-fit ​​parts with the snap-fit ​​holes, the distance between the upper cover and the bottom cover is changed, and the elastic unit is placed in the use state or the storage state or the preload of the elastic unit is changed.

7. The independent elastic unit according to claim 1, characterized in that: The upper cover is a ring, and the first ring groove is provided on the side of the ring facing the bottom cover. The upper edge of the cloth cover passes around the ring and is fixedly connected to the inner periphery of the ring.

8. The independent elastic unit according to claim 1, characterized in that: The bottom cover is recessed on the side away from the top cover towards the top cover to form a cavity, which serves as the connector.

9. The independent elastic unit according to claim 8, characterized in that: The inner wall of the cavity is provided with L-shaped snap-fit ​​parts spaced along the axial direction.

10. The independent elastic unit according to claim 1, characterized in that: The ratio of the outer diameter to the height of the elastic element is between 1:1 and 1:

3.

11. An elastic pad, characterized in that... Includes a base plate, a cushion layer, and an elastic unit as described in any one of claims 1-10; The base plate is provided with an array of connecting fittings that mate with the bottom cover of the elastic unit, so as to arrange the elastic unit array on the base plate, and the elastic pad is arranged on the side of the elastic unit away from the base plate.

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