Spring structure for mattress

Abstract

The invention provides a spring structure for a mattress, which comprises a first protective tube and a second protective tube inserted into the inner wall of the first protective tube, a spring body is arranged between the second protective tube and the first protective tube, and a convex ring is fixedly connected to the peripheral side of one end, far away from the first protective tube, of the second protective tube. A flexible sealing protection sleeve is arranged between the convex ring and the outer surface of the first protection pipe in a sleeving mode, and the flexible sealing protection sleeve, the first protection pipe and the second protection pipe are matched to be used for isolating the spring body from the outside. The spring body can be effectively isolated from the external environment through the first protection pipe, the second protection pipe, the flexible sealing protection sleeve and other parts, so that the contact path of the spring body and moisture is cut off, the situation of spring body corrosion is reduced, and due to the fact that corrosion of the spring body is reduced, the service life of the spring body is prolonged. The elastic performance of the spring body can be kept stable for a long time.

Description

Technical Field

[0001] This invention relates to the field of mattress spring technology, and more specifically, to a spring structure for mattresses. Background Technology

[0002] In the mattress manufacturing industry, springs are a key component forming the core support structure of a mattress. Their performance directly affects the mattress's comfort, support, and lifespan. Traditional mattress springs are typically exposed to the internal environment of the mattress. Because mattress fabrics are often made of breathable materials, the springs are easily exposed to external air and moisture for extended periods. During actual use, the body produces sweat and moisture, which can cause the springs to rust in this environment. Rusting degrades the springs' performance, making them less usable. Therefore, we have made improvements and proposed a new spring structure for mattresses. Summary of the Invention

[0003] The present invention provides a spring structure for a mattress, including a first protective tube and a second protective tube inserted into the inner wall of the first protective tube. A spring body is disposed between the second protective tube and the first protective tube. A convex ring is fixedly connected to the outer peripheral side of the second protective tube away from the first protective tube. A flexible sealing protective sleeve is sleeved between the convex ring and the outer surface of the first protective tube. The flexible sealing protective sleeve, the first protective tube and the second protective tube cooperate to isolate the spring body from the outside world.

[0004] As a preferred technical solution of this application, a limiting member is provided between the first protective tube and the second protective tube, and the limiting member is used to limit the distance between the first protective tube and the second protective tube; The limiting component includes a second retaining ring fixedly installed at the top end of the first protective tube and a first retaining ring fixedly installed at the bottom end of the second protective tube, with the first retaining ring located below the second retaining ring; The inner wall of the first protective tube, the inner wall of the second retaining ring, the outer surface of the second protective tube, and the outer surface of the first retaining ring are all provided with a lubricating coating.

[0005] As a preferred technical solution of this application, the inner diameter D1 of the first protective tube 1 and the outer diameter D2 of the second protective tube 1 satisfy the fitting clearance formula: δ=D1-D2=(0.02×D2)~(0.05×D2), where δ is the fitting clearance (unit: m), and the fitting clearance δ is greater than the radial deformation Δr of the spring body under the maximum compression, that is, δ>Δr=(F×D) / (2×k×D1), where F is the rated bearing pressure of the spring body (unit: N), and D is the middle diameter of the spring body.

[0006] As a preferred technical solution of this application, a base plate is fixedly installed at the bottom of the first protective tube, and a top plate is fixedly installed at the top of the convex ring. Both the base plate and the top plate are provided with mounting holes.

[0007] As a preferred technical solution of this application, a threaded opening is provided between the top plate and the convex ring, and a threaded sealing plug is threadedly connected to the threaded opening. The spring body can be removed from the threaded opening for replacement after the threaded sealing plug is unscrewed.

[0008] As a preferred technical solution of this application, the top of the threaded sealing plug is provided with an internal hexagonal groove, which is used to cooperate with an existing hexagonal wrench to rotate the threaded sealing plug.

[0009] As a preferred technical solution of this application, a first limiting rod is fixedly installed at the bottom of the threaded sealing plug, and the outer surface of the first limiting rod is inserted into the inner side of the spring body.

[0010] As a preferred technical solution of this application, a second limiting rod is fixedly installed on the top of the base plate. The outer surface of the second limiting rod is inserted into the inner side of the spring body. The ends of the second limiting rod and the first limiting rod that are close to each other are provided with slopes.

[0011] As a preferred technical solution of this application, a plurality of through holes are provided on the outer periphery of the first protective tube; the flexible sealing protective sleeve is bonded and fixed to the convex ring and the first protective tube by adhesive, and the height of the adhesive bonding point between the flexible sealing protective sleeve and the first protective tube is lower than the height of the through holes. The thickness t2 of the flexible sealing protective sleeve satisfies the sealing strength formula: t≥(p×D1) / (2×[τ]), where p is the maximum possible external air pressure difference (unit: Pa), [τ] is the allowable shear stress of the protective sleeve material (unit: Pa), and the value range of t2 is 0.5mm~2mm.

[0012] The top of the top plate is provided with a protective layer, and the top plate is provided with a plurality of first connection ports. Two limiting plates are inserted into the first connection ports. The outer side of the bottom end of the limiting plate is provided with a limiting protrusion, and the top of the limiting protrusion contacts the bottom of the top plate to achieve limiting. The bottom of the limiting protrusion has a chamfer. Multiple insert rods are fixedly installed at the bottom of the protective layer. A second connection port for inserting the insert rods is provided on the top plate. A groove is provided at the bottom of the insert rod, and the bottom end of the insert rod expands outward.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: In the scheme of this application: This application effectively isolates the spring body from the external environment through components such as the first protective tube, the second protective tube, and the flexible sealing protective sleeve, thereby cutting off the path for the spring body to come into contact with moisture and reducing the corrosion of the spring body. As the corrosion of the spring body is reduced, the elastic performance of the spring body can remain stable for a long time, which is beneficial for use. Attached Figure Description

[0014] Figure 1 A schematic diagram of the spring structure for a mattress provided in this application; Figure 2 Schematic diagrams of the first and second protective tubes provided in this application; Figure 3 A bottom view of the convex ring provided in this application; Figure 4 A cross-sectional structural diagram of the first and second protective tubes provided in this application; Figure 5 A schematic diagram of the structure when the limiting plate provided in this application is inserted into the first connection port; Figure 6 A schematic diagram of the structure of the second connection port provided in this application.

[0015] The image shows: 1. First protective tube; 101. Second protective tube; 102. Convex ring; 103. First retaining ring; 104. Spring body; 105. Through hole; 106. Threaded sealing plug; 107. Internal hexagonal groove; 108. First limiting rod; 109. Second retaining ring; 2. Flexible sealing protective sleeve; 3. Base plate; 301. Second limiting rod; 4. Top plate; 401. First connecting port; 402. Second connecting port; 5. Protective layer; 501. Limiting plate; 502. Limiting protrusion; 503. Insert rod; 504. Groove. Detailed Implementation

[0016] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0017] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0018] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0019] For an example, please refer to... Figures 1-6 A spring structure for a mattress includes a first protective tube 1 and a second protective tube 101 inserted into the inner wall of the first protective tube 1. A spring body 104 is disposed between the second protective tube 101 and the first protective tube 1. A protruding ring 102 is fixedly connected to the outer periphery of the end of the second protective tube 101 away from the first protective tube 1. A flexible sealing protective sleeve 2 is sleeved between the protruding ring 102 and the outer surface of the first protective tube 1. The flexible sealing protective sleeve 2, the first protective tube 1, and the second protective tube 101 cooperate to isolate the spring body 104 from the outside world, thereby cutting off the spring body. The contact path between the spring body 104 and moisture is reduced, thus minimizing corrosion of the spring body 104. This reduced corrosion allows the spring body 104 to maintain stable elasticity over a long period, facilitating its use. The flexible sealing sleeve 2 is made of rubber; the rubber flexible sealing sleeve 2 has excellent elastic sealing properties, allowing it to tightly fit the outer surface of the convex ring 102 and the first protective tube 1, eliminating the risk of leakage through gaps. Simultaneously, the flexibility of the flexible sealing sleeve 2 does not affect the vertical expansion and contraction of the second protective tube 101, solving the compatibility problem between sealing and movement.

[0020] Furthermore, a limiting member is provided between the first protective tube 1 and the second protective tube 101, and the limiting member is used to limit the distance between the first protective tube 1 and the second protective tube 101; The limiting component includes a second retaining ring 109 fixedly installed at the top end of the first protective tube 1 and a first retaining ring 103 fixedly installed at the bottom end of the second protective tube 101. The first retaining ring 103 is located below the second retaining ring 109. The second retaining ring 109 and the first protective tube 1 are integrally formed, and the first retaining ring 103 and the second protective tube 101 are integrally formed. The first retaining ring 103 and the second retaining ring 109 cooperate with each other to prevent the second protective tube 101 from coming off the top of the first protective tube 1. The inner wall of the first protective tube 1, the inner wall of the second retaining ring 109, the outer surface of the second protective tube 101, and the outer surface of the first retaining ring 103 are all provided with a lubricating coating, which can be a PTFE-based coating.

[0021] Furthermore, the inner diameter D1 of the first protective tube 1 and the outer diameter D2 of the second protective tube 101 satisfy the fitting clearance formula: δ=D1-D2=(0.02×D2)~(0.05×D2), where δ is the fitting clearance (unit: m), and the fitting clearance δ is greater than the radial deformation Δr of the spring body 104 under the maximum compression, that is, δ>Δr=(F×D) / (2×k×D1), where F is the rated bearing pressure of the spring body 104 (unit: N) and D is the mean diameter of the spring body 104 (unit: m); the precise fitting clearance design allows the radial deformation of the spring body 104 to proceed without obstruction.

[0022] Furthermore, a base plate 3 is fixedly installed at the bottom of the first protective tube 1, and a top plate 4 is fixedly installed at the top of the convex ring 102. Both the base plate 3 and the top plate 4 are provided with mounting holes. The mounting holes allow the present application to be sewn together with the mattress fabric by passing a needle and thread through the mounting holes during application.

[0023] Furthermore, a threaded opening is provided between the top plate 4 and the convex ring 102, and a threaded sealing plug 106 is threadedly connected to the threaded opening. The spring body 104 can be removed from the threaded opening for replacement after the threaded sealing plug 106 is unscrewed. The top of the threaded sealing plug 106 is provided with an internal hexagonal groove 107, which is used to rotate the threaded sealing plug 106 in conjunction with an existing hexagonal wrench. The threaded sealing plug 106 has both sealing and opening functions. The threaded connection ensures the reliability of the seal, and the internal hexagonal groove 107 is compatible with general tools, so it can be operated without special equipment.

[0024] Furthermore, a first limiting rod 108 is fixedly installed at the bottom of the threaded sealing plug 106. The outer surface of the first limiting rod 108 is inserted into the inner side of the spring body 104. The first limiting rod 108 is used to limit the top area of ​​the spring body 104 to reduce the deviation of the spring body 104.

[0025] Furthermore, a second limiting rod 301 is fixedly installed on the top of the base plate 3. The outer surface of the second limiting rod 301 is inserted into the inner side of the spring body 104. The ends of the second limiting rod 301 and the first limiting rod 108 that are close to each other are provided with ramps. The second limiting rod 301 can limit the bottom area of ​​the spring body 104.

[0026] Furthermore, several through holes 105 are provided on the outer periphery of the first protective tube 1. During the descent of the second protective tube 101, the through holes 105 are used to discharge the air pressure inside the first protective tube 1 to the space between the first protective tube 1 and the flexible sealing protective sleeve 2. The flexible sealing protective sleeve 2 is made of rubber so that it can expand to accommodate the air pressure discharged through the through holes 105. As the second protective tube 101 descends, the internal space of the first protective tube 1 shrinks and the air pressure increases. The through holes 105 provide a channel for the air pressure to be discharged. The flexible sealing protective sleeve 2 made of rubber can expand elastically to accommodate the discharged gas, reduce the accumulation of air pressure and generate reverse thrust, and ensure that the spring body 104 extends and retracts smoothly.

[0027] Furthermore, the flexible sealing protective sleeve 2 is bonded and fixed to the convex ring 102 and the first protective tube 1 with adhesive, and the height of the adhesive bonding point between the flexible sealing protective sleeve 2 and the first protective tube 1 is lower than the height of the through hole 105. That is, the area corresponding to the flexible sealing protective sleeve 2 and the through hole 105 is not fixed to the first protective tube 1 to meet the usage requirements. The adhesive used is an adhesive that meets national environmental protection standards (such as GB18583-2008). The thickness t2 of the flexible sealing protective sleeve 2 satisfies the sealing strength formula: t≥(p×D1) / (2×[τ]), where p is the maximum possible external air pressure difference (unit: Pa), [τ] is the allowable shear stress of the flexible sealing protective sleeve 2 material (unit: Pa), and the value range of t2 is 0.5mm~2mm, the value range of p is 500-2000Pa, and [τ] is determined according to the characteristics of the protective sleeve material, with nitrile rubber having a value of 15-25MPa and silicone rubber having a value of 10-20MPa. The thickness range calculated by the strength formula ensures that the flexible sealing protective sleeve 2 can withstand the maximum air pressure difference without breaking, while avoiding excessive thickness that would affect the elastic expansion performance. The value of 0.5mm~2mm takes into account both sealing strength and flexibility requirements.

[0028] A protective layer 5 is provided on the top of the top plate 4. Several first connection ports 401 are provided on the top plate 4. Two limiting plates 501 are inserted into the first connection ports 401. A limiting protrusion 502 is provided on the outer side of the bottom end of the limiting plate 501. The top of the limiting protrusion 502 contacts the bottom of the top plate 4 to achieve limiting. The bottom of the limiting protrusion 502 has a chamfer. The chamfer makes it easier for the limiting protrusion 502 to be inserted into the first connection port 401. Through the cooperation of the limiting protrusion 502, the limiting plate 501 and the first connection port 401, the protective layer 5 can be limited to the top of the top plate 4. Multiple insert rods 503 are fixedly installed at the bottom of the protective layer 5. A second connection port 402 is provided on the top plate 4 for inserting the insert rods 503. A groove 504 is provided at the bottom of the insert rod 503, and the bottom end of the insert rod 503 expands outward so that the insert rod 503 has a tensioning force after being inserted into the second connection port 402. The bottom end of the insert rod 503 is provided with an arc-shaped chamfer to facilitate the insertion of the bottom end of the insert rod 503 into the second connection port 402. The protective layer 5, the limiting plate 501, the insertion rod 503 and the entire insertion rod 503 can be made of molded cotton; molded cotton is lightweight and has excellent aging resistance and corrosion resistance.

[0029] When replacing the spring body 104, first unscrew the threaded sealing plug 106 through the internal hexagonal groove 107 with a hex wrench. Take out the old spring body 104 from the threaded opening between the top plate 4 and the convex ring 102 and put in the new spring body 104. Slide the bottom end of the spring body 104 onto the second limiting rod 301 at the top of the base plate 3, and align the top end with the installation position of the first limiting rod 108 below the threaded opening. Screw the threaded sealing plug 106 back onto the threaded opening and tighten it. At this time, the first limiting rod 108 is inserted into the inner side of the top end of the spring body 104, completing the installation of the spring body 104.

[0030] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. A spring structure for a mattress, characterized in that, It includes a first protective tube (1) and a second protective tube (101) inserted into the inner wall of the first protective tube (1). A spring body (104) is provided between the second protective tube (101) and the first protective tube (1). A convex ring (102) is fixedly connected to the outer periphery of the end of the second protective tube (1) away from the first protective tube (1). A flexible sealing protective sleeve (2) is sleeved between the convex ring (102) and the outer surface of the first protective tube (1). The flexible sealing protective sleeve (2), the first protective tube (1) and the second protective tube (101) cooperate to isolate the spring body (104) from the outside world.

2. The spring structure for a mattress according to claim 1, characterized in that, A limiting member is provided between the first protective tube (1) and the second protective tube (101), and the limiting member is used to limit the distance between the first protective tube (1) and the second protective tube (101); The limiting component includes a second retaining ring (109) fixedly installed at the top end of the first protective tube (1) and a first retaining ring (103) fixedly installed at the bottom end of the second protective tube (101), wherein the first retaining ring (103) is located below the second retaining ring (109); The inner wall of the first protective tube (1), the inner wall of the second retaining ring (109), the outer surface of the second protective tube (101), and the outer surface of the first retaining ring (103) are all provided with a lubricating coating.

3. The spring structure for a mattress according to claim 1, characterized in that, The inner diameter D1 of the first protective tube (1) and the outer diameter D2 of the second protective tube (101) satisfy the fitting clearance formula: δ=D1-D2=(0.02×D2)~(0.05×D2), where δ is the fitting clearance, and the fitting clearance δ is greater than the radial deformation Δr of the spring body (104) under the maximum compression, that is, δ>Δr=(F×D) / (2×k×D1), where F is the rated bearing pressure of the spring body (104) and D is the middle diameter of the spring body (104).

4. The spring structure for a mattress according to claim 1, characterized in that, The bottom of the first protective tube (1) is fixedly installed with a base plate (3), and the top of the convex ring (102) is fixedly installed with a top plate (4). Both the base plate (3) and the top plate (4) are provided with mounting holes.

5. The spring structure for a mattress according to claim 4, characterized in that, A threaded opening is provided between the top plate (4) and the convex ring (102), and a threaded sealing plug (106) is threadedly connected to the threaded opening. The spring body (104) is taken out from the threaded opening for replacement after the threaded sealing plug (106) is unscrewed.

6. The spring structure for a mattress according to claim 5, characterized in that, The top of the threaded sealing plug (106) is provided with an internal hexagonal groove (107), which is used to cooperate with an existing hexagonal wrench to rotate the threaded sealing plug (106).

7. The spring structure for a mattress according to claim 6, characterized in that, The bottom of the threaded sealing plug (106) is fixedly installed with a first limiting rod (108), and the outer surface of the first limiting rod (108) is inserted into the inner side of the spring body (104).

8. The spring structure for a mattress according to claim 7, characterized in that, A second limiting rod (301) is fixedly installed on the top of the base plate (3). The outer surface of the second limiting rod (301) is inserted into the inner side of the spring body (104). The ends of the second limiting rod (301) and the first limiting rod (108) that are close to each other are provided with ramps.

9. The spring structure for a mattress according to claim 1, characterized in that, The outer periphery of the first protective tube (1) is provided with several through holes (105). The flexible sealing protective sleeve (2) is fixed to the convex ring (102) and the first protective tube (1) by adhesive. The height of the adhesive bonding point between the flexible sealing protective sleeve (2) and the first protective tube (1) is lower than the height of the through holes (105). The thickness t2 of the flexible sealing protective sleeve (2) satisfies the sealing strength formula: t≥(p×D1) / (2×[τ]), where p is the maximum possible air pressure difference generated by the outside, [τ] is the allowable shear stress of the protective sleeve material, and the value range of t2 is 0.5mm~2mm.

10. The spring structure for a mattress according to claim 9, characterized in that, The top plate (4) is provided with a protective layer (5). The top plate (4) is provided with a plurality of first connection ports (401). Two limiting plates (501) are inserted into the first connection ports (401). The outer side of the bottom end of the limiting plate (501) is provided with a limiting protrusion (502). The top of the limiting protrusion (502) contacts the bottom of the top plate (4) to achieve limiting. The bottom of the limiting protrusion (502) has a chamfer. The bottom of the protective layer (5) is fixedly installed with multiple insert rods (503), and the top plate (4) is provided with a second connection port (402) for inserting the insert rods (503). The bottom of the insert rods (503) is provided with a groove (504), and the bottom end of the insert rods (503) expands outward.

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