Nail-free supporting spring and mattress

Abstract

The invention discloses a nail-free supporting spring and a mattress, the nail-free supporting spring comprises a torsion spring body, the free ends of two spring arms of the torsion spring body respectively and linearly extend along the spiral tangential direction to form a first force applying arm and a second force applying arm with an included angle; the tail end plane of the first force applying arm is bent to form a first fastening section, and then the first fastening section is screwed in the spiral direction opposite to the spiral direction of the torsion spring body to form a first winding part used for being connected with a first component. The plane of the tail end of the second force applying arm is bent to form a second fastening section, and then the second fastening section is screwed in the spiral direction opposite to the spiral direction of the torsion spring body to form a second winding part used for being connected with a second component. According to the invention, the problems that the traditional supporting spring is connected with the upper frame and the lower frame of the mattress by adopting an iron sheet nailing mode, the use amount of iron sheets is increased, specific nailing equipment is needed for assembly, and the manufacturing cost of the mattress is increased can be solved.

Description

Technical Field

[0001] The present invention relates to the field of springs, and in particular to a nail-free support spring and a mattress. Background Art

[0002] In the field of spring mattress manufacturing, the mattress body is usually composed of a spring layer (such as Merlot springs or independent pocket springs), an upper frame located on the top of the spring layer, a lower frame located at the bottom of the spring layer, and support springs connecting the upper and lower frames; the main function of the support springs is to support the sides of the mattress, maintain the overall structural shape of the mattress, and withstand a certain lateral force.

[0003] Traditionally, the ends of support springs are secured to the upper and lower frames using a custom iron sheet (a clip) that wraps or fastens the spring ends to the frame, then secures the sheet with specialized nailing equipment. While this method provides a certain degree of connection strength, ensuring the support springs don't loosen during mattress use, it increases the amount of iron sheet used and the need for specialized nailing equipment, driving up mattress manufacturing costs. Summary of the Invention

[0004] The present invention aims to solve the above technical problem, namely that traditional support springs are connected to the upper and lower frames of the mattress by nailing iron sheets, which increases the amount of iron sheets used and requires specific nailing equipment for assembly, thereby raising the manufacturing cost of the mattress.

[0005] In a first aspect, the present invention provides a nail-free support spring, comprising: a torsion spring body, the free ends of its two spring arms respectively extending in a straight line along the spiral tangent direction to form a first force applying arm and a second force applying arm with an angle; the end plane of the first force applying arm is bent to form a first fastening section and then spiraled in the opposite spiral direction of the torsion spring body to form a first tightening portion for connecting to a first component; the end plane of the second force applying arm is bent to form a second fastening section and then spiraled in the opposite spiral direction of the torsion spring body to form a second tightening portion for connecting to a second component.

[0006] The present application connects the extended parts at both ends of the support spring to the upper frame and the lower frame of the mattress by fastening and snapping, which can effectively reduce the use of mattress materials, reduce the production cost of the mattress, and improve the efficiency of installing the first tightening part of the support spring on the upper frame and the second tightening part on the small frame.

[0007] In addition, the present application adopts a first fastening section bent and formed at the end of the first force applying arm to fasten the upper frame, and a second fastening section bent and formed at the end of the second force applying arm to fasten the lower frame. With the help of the torsion spring body 1 and the first force applying arm and the second force applying arm, the first fastening section always has a fastening force toward the upper frame, and the second fastening section always has a fastening force toward the lower frame, forming a limit for the nail-free support spring of the present application, avoiding the problem of several nail-free support springs shifting on the side of the spring mattress, and improving the fixing effect of the nail-free support spring of the present application on the upper and lower frames of the spring mattress.

[0008] In the preferred technical solution of the above-mentioned nail-free support spring, the bent portion of the first fastening section is at least partially fastened to the surface of the first component, and the bent portion of the second fastening section is at least partially fastened to the surface of the second component.

[0009] In the preferred technical solution of the above-mentioned nail-free support spring, the first tightening portion is spirally wound around the first component for an effective number of turns of at least one, and the second tightening portion is spirally wound around the second component for an effective number of turns of at least one.

[0010] In the preferred technical solution of the above-mentioned nail-free support spring, the bending radius between the first force application arm and the first fastening section is 2.5-3 mm, and the bending radius between the second force application arm and the second fastening section is 2.5-3 mm.

[0011] In the preferred technical solution of the above-mentioned nail-free support spring, the first tightening portion spirally forms a gripping inner diameter of the first component of 4-6 mm, and the second tightening portion spirally forms a gripping radius of the second component of 4-6 mm.

[0012] In the preferred technical solution of the above-mentioned nail-free support spring, the end of the first tightening part and the end of the second tightening part extend in opposite directions to each other, and the axial distance between the end of the first tightening part and the end of the second tightening part is 40-50 mm.

[0013] In the preferred technical solution of the above-mentioned nail-free support spring, the wire diameter of the torsion spring body is 2-3 mm, and the outer diameter of the torsion spring body is 15-25 mm.

[0014] In the preferred technical solution of the above-mentioned nail-free support spring, the angle between the first force applying arm and the second force applying arm is 140°-150°.

[0015] In the preferred technical solution of the above-mentioned nail-free support spring, the torsion spring body is made of carbon steel with a carbon content of less than 0.8%.

[0016] In a second aspect, the present invention further provides a mattress comprising the above-mentioned nail-free support spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the front view of the nail-free support spring; Figure 2 This is a front view of the nail-free support spring; Figure 3 This is a back view of the nail-free support spring; Figure 4 It is a side view of the nail-free support spring; Figure 5 Schematic diagram of the connection between the first fastening section and the first component Figure 1 ; Figure 6 Schematic diagram of the connection between the first fastening section and the second component Figure 2 ; In the figure: a torsion spring body 1, a first force applying arm 2, a first fastening section 21, a first tightening portion 22, a second force applying arm 3, a second fastening section 31, a second tightening portion 32, a first component 4, and a second component 5. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0019] It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "front," and "rear" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. These are merely for ease of description and are not intended to indicate or imply that the device or component described must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] Furthermore, it should be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "connected," and "connected" should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or an integral connection. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0021] Based on the problem pointed out in the background art that current support springs are connected to the upper and lower frames of a mattress by nailing iron sheets, this increases the amount of iron sheets used and requires specialized nailing equipment for assembly, thereby increasing the cost of mattress manufacturing. The present invention provides a nail-free support spring that aims to secure the ends of the support ring to the upper and lower frames using a snap-fit ​​method, eliminating the need for iron sheets and nailing equipment, thereby significantly reducing the cost and difficulty of mattress production.

[0022] See also Figures 1 to 6 The nail-free support spring of the present invention includes: a torsion spring body 1, the free ends of its two spring arms extend straight along the spiral tangent direction to form a first force application arm 2 and a second force application arm 3 with an included angle; the end plane of the first force application arm 2 is bent to form a first fastening section 21, and then spiraled in the opposite spiral direction of the torsion spring body 1 to form a first tightening portion 22 for connecting to the first component 4; the end plane of the second force application arm 3 is bent to form a second fastening section 31, and then spiraled in the opposite spiral direction of the torsion spring body 1 to form a second tightening portion 32 for connecting to the second component 5.

[0023] The main body of a spring mattress is generally composed of a spring layer, an upper frame, a lower frame and a support spring. The spring layer can be a pocket spring or an independent pocket spring. The upper frame is arranged on the top of the spring layer, and the lower frame is arranged on the spring layer. The two ends of the support spring are fixed on the upper frame and the lower frame respectively. When the two ends of the traditional support spring are installed with the upper frame and the lower frame, iron sheets need to be used to fasten the two ends of the support spring to the upper frame and the lower frame, and nailing equipment needs to be used to nail the iron sheets. Although the connection strength between the support spring and the upper frame and the lower frame is improved, the production cost and difficulty of the mattress are also increased.

[0024] See also Figure 1 The nail-free support spring of this application does not use iron sheets at both ends to connect with the upper frame and the lower frame. The two ends of the support ring of this application are clamped on the upper frame and the lower frame in a buckled manner, eliminating the use of iron sheets and nailing equipment, greatly reducing the production cost and difficulty of the mattress.

[0025] See also Figures 1 to 6 The nail-free support spring of the present application specifically includes: a torsion spring body 1, the free ends of the two spring arms of the torsion spring body 1 extend straightly along the spiral tangent direction of the torsion spring body 1 to form a first force applying arm 2 and a second force applying arm 3, and the first force applying arm 2 and the second force applying arm 3 have an angle roughly in the shape of "<" or ">", the end of the first force applying arm 2 is bent toward the plane of the torsion spring body 1 to form a first fastening section 21, the first fastening section 21 is used to press against the surface of the first component 4, the end of the first fastening section 21 is spiraled in a counter-spiral direction to form a first winding portion 22, the first winding portion 22 is wound around the first component 4, the end of the second force applying arm 3 is bent toward the plane of the torsion spring body 1 to form a second fastening section 31, the second fastening section 31 is used to press against the surface of the second component 5, the end of the second fastening section 31 is spiraled in a counter-spiral direction to form a second winding portion 32, the second winding portion 32 is wound around the second component 5.

[0026] See also Figure 1The spiral direction of the first tightening portion 22 is opposite to the spiral direction of the torsion spring body 1. For example, if the torsion spring body 1 from the second force application arm 3 to the first force application arm 2 is a counterclockwise spiral, then the first tightening portion 22 is a clockwise spiral. The spiral direction of the second tightening portion 32 is opposite to the spiral direction of the torsion spring body 1. For example, if the torsion spring body 1 from the first force application arm 2 to the second force application arm 3 is a clockwise spiral, then the spiral direction of the second tightening portion 32 is counterclockwise. When the first tightening portion 22 is spirally formed on the first component 4 and the second tightening portion 32 is spirally formed on the second component 5, the first tightening portion 22 extends downward in the axial direction and the second tightening portion 32 extends upward in the axial direction, so that the structure of the nail-free support spring of the present application is roughly "Z"-shaped.

[0027] It can be understood that the first component 4 is either the upper frame or the lower frame of the spring mattress, and the second component 5 is either the upper frame or the lower frame of the spring mattress, that is, when the first component 4 is the upper frame, the second component 5 is the lower frame.

[0028] Specifically, when the nail-free support spring of the present application fastens the upper and lower frames of the mattress, the end of the first tightening portion 22 is first tilted up to allow the spiral channel of the first tightening portion 22 to leak out. The first tightening portion 22 is then moved toward the first member 4 and the first member 4 is inserted into the spiral channel of the first tightening portion 22. Thereafter, the first tightening section 21 is twisted upward to allow the first member 4 to be positioned below the "√"-shaped first tightening section 21. The first tightening section 21 is then released. With the help of the elastic force of the first force applying arm 2 and the torsion spring body 1, the first tightening section 21 fastens to the first member 4 and causes the first tightening portion 22 to spirally wrap around the first member 4. Similarly, when installing the second tightening portion 32, the above operation is repeated. It can be understood that when the mattress is compressed, the distance between the upper and lower frames will decrease, thereby reducing the angle between the first force applying arm 2 and the second force applying arm 3.

[0029] The present application can effectively reduce the use of mattress materials by connecting the extended parts at both ends of the support spring to the upper frame and the lower frame of the mattress by fastening and clamping. For example, the iron sheets used to fasten the two ends of the support spring to the upper frame and the lower frame can be used. In addition, it can also reduce the production cost of the mattress. For example, the nailing equipment used to fix the iron sheets can improve the efficiency of installing the first tightening part 22 of the support spring on the upper frame and the second tightening part 32 on the small frame. In addition, the present application adopts a first fastening section 21 bent and formed at the end of the first force applying arm 2 to fasten the upper frame, and a second fastening section 31 bent and formed at the end of the second force applying arm 3 to fasten the lower frame. With the help of the torsion spring body 1 and the first force applying arm 2 and the second force applying arm 3, the first fastening section 21 always has a fastening force toward the upper frame, and the second fastening section 31 always has a fastening force toward the lower frame, forming a limit for the nail-free support spring of the present application, avoiding the problem of several nail-free support springs shifting on the side of the spring mattress, and improving the fixing effect of the nail-free support spring of the present application on the upper and lower frames of the spring mattress.

[0030] In one or more embodiments, the curved portion of the first fastening section 21 is at least partially fastened to the surface of the first member 4, and the curved portion of the second fastening section 31 is at least partially fastened to the surface of the second member 5. This arrangement ensures that the first fastening section 21 secures the upper frame, and the second fastening section 31 secures the lower frame, thereby reducing the possibility of displacement of the support spring relative to the upper or lower frame.

[0031] See also Figures 1 to 4 The outer edge of the bent part of the first fastening section 21 does not exceed the spiral outer diameter of the first tightening part 22, and the outer edge of the bent part of the second fastening section 31 does not exceed the spiral outer diameter of the second tightening part 32. Through this arrangement, after the support spring of the present application is connected to the upper frame and the lower frame of the mattress, the first tightening part 22 and the second tightening part 32 of the support spring will not protrude excessively, that is, after the bed cloth wraps the main body of the mattress, there will be no bulge on the side of the upper frame or the lower frame.

[0032] In one or more embodiments, the first tightening portion 22 is spirally wound around the first component 4 for an effective number of turns of at least one, and the second tightening portion 32 is spirally wound around the second component 5 for an effective number of turns of at least one.

[0033] See also Figures 1 to 3The effective number of turns of the first tightening portion 22 and the second tightening portion 32 refers to the number of effective working turns of the spring involved in deformation. In one specific embodiment, the first tightening portion 22 spirally wraps around the first member 4 for one effective turn, and the second tightening portion 32 spirally wraps around the second member 5 for one effective turn. In other words, the end of the first tightening portion 22 is on the same side as the curved portion of the first fastening section 21, and the end of the second tightening portion 32 is on the same side as the curved portion of the second fastening section 31. By setting the effective number of turns of the first tightening part 22 and the second tightening part 32 to a lower number, it is possible to facilitate the bending of the end of the first tightening part 22 and the placement of the first component 4 (upper frame) into the spiral coil of the first tightening part 22, and to facilitate the bending of the end of the second tightening part 32 and the placement of the second component 5 (lower frame) into the spiral coil of the second tightening part 32. This improves the convenience of installing the first tightening part 22 and the first component 4, and the second tightening part 32 and the second component 5, while ensuring the connection strength of each connecting part and reducing the problem of the first tightening part 22 and the second tightening part 32 falling off.

[0034] In one or more embodiments, the bending radius between the first force application arm 2 and the first fastening segment 21 is 2.5-3 mm, and the bending radius between the second force application arm 3 and the second fastening segment 31 is 2.5-3 mm. In a specific embodiment, the bending radius between the first force application arm 2 and the first fastening segment 21 is 2.75 mm, and the bending radius between the second force application arm 3 and the second fastening segment 31 is 2.75 mm. It is understood that the bending radius of the first fastening segment 21 and the bending radius of the second fastening segment 31 can be adaptively adjusted based on the outer diameters of the upper and lower frames.

[0035] In a specific embodiment, the bending angle between the first force application arm 2 and the first fastening section 21 is 50-70°, and the bending angle between the second force application arm 3 and the second fastening section 31 is 50-70°. Specifically, the value of the above angles can be 60°.

[0036] In one or more embodiments, the first tightening portion 22 is spirally formed to have an inner diameter of 4-6 mm for gripping the first member 4 , and the second tightening portion 32 is spirally formed to have a grip radius of 4-6 mm for gripping the second member 5 .

[0037] See also Figure 4The gripping inner diameter of the first tightening portion 22 is the inner diameter of the spiral after the first tightening portion 22 is spirally formed, and the gripping inner diameter of the second tightening portion 32 is the inner diameter of the spiral after the second tightening portion 32 is spirally formed. In a specific embodiment, the gripping inner diameter of the first tightening portion 22 is 5 mm, and the gripping inner diameter of the second tightening portion 32 is 5 mm. It is understood that the gripping inner diameters of the first tightening portion 22 and the second tightening portion 32 need to be adaptively adjusted according to the outer diameters of the upper and lower frames, and are not specifically limited thereto.

[0038] In one or more embodiments, the end of the first tightening portion 22 and the end of the second tightening portion 32 extend in opposite directions, and the axial distance between the end of the first tightening portion 22 and the end of the second tightening portion 32 is 40-50 mm.

[0039] See also Figures 1 to 3 The spiral forming directions of the first tightening part 22 and the second tightening part 32 are opposite to each other in the axial direction, so that the support spring is roughly "Z"-shaped after forming, and the axial distance between the end of the first tightening part 22 and the end of the second tightening part 32 after forming is 44mm.

[0040] In one or more embodiments, the wire diameter of the torsion spring body 1 is 2-3 mm, the outer diameter of the torsion spring body 1 is 15-25 mm, and the effective number of turns of the torsion spring body 1 is at least 2 turns.

[0041] In one or more embodiments, the angle between the first force applying arm 2 and the second force applying arm 3 is 140°-150°. Specifically, the angle between the first force applying arm 2 and the second force applying arm 3 is 145°. When the mattress is compressed and the distance between the upper and lower frames decreases, the angle between the first force applying arm 2 and the second force applying arm 3 decreases to accommodate the change in the upper and lower frames.

[0042] In one or more embodiments, the torsion spring body 1 is made of carbon steel with a carbon content of less than 0.8%. It is understood that carbon steel with a carbon content of less than 0.8% is high-quality carbon structural steel, containing less sulfur, phosphorus, and non-metallic inclusions than carbon structural steel, and exhibiting superior mechanical properties. This effectively ensures the strength of the support spring while extending its service life.

[0043] In addition, the present invention also provides a mattress having the nail-free support spring in any of the above embodiments.

[0044] The above embodiments are only for illustrating the technical concept and features of the present invention. Its purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. It cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A nail-free support spring, characterized in that: include: A torsion spring body, wherein the free ends of the two spring arms extend linearly along the spiral tangent direction to form a first force applying arm and a second force applying arm having an included angle; The end plane of the first force applying arm is bent to form a first fastening section, and then spiraled in the opposite spiral direction of the torsion spring body to form a first tightening portion for connecting the first component. The end plane of the second force applying arm is bent to form a second fastening section, and then spiraled in the opposite spiral direction of the torsion spring body to form a second tightening portion for connecting the second component.

2. The nail-free support spring according to claim 1, characterized in that: The bent portion of the first fastening section is at least partially fastened to the surface of the first component, and the bent portion of the second fastening section is at least partially fastened to the surface of the second component.

3. The nail-free support spring according to claim 1 or 2, characterized in that: The first tightening portion is spirally wound around the first component for an effective number of at least one turn, and the second tightening portion is spirally wound around the second component for an effective number of at least one turn.

4. The nail-free support spring according to claim 1 or 2, characterized in that: The bending radius between the first force applying arm and the first fastening section is 2.5-3 mm, and the bending radius between the second force applying arm and the second fastening section is 2.5-3 mm.

5. The nail-free support spring according to claim 1, characterized in that: The first tightening portion spirally forms an inner diameter of 4-6 mm for gripping the first component, and the second tightening portion spirally forms a gripping radius of 4-6 mm for gripping the second component.

6. The nail-free support spring according to claim 1, characterized in that: The end of the first tightening portion and the end of the second tightening portion extend in opposite directions to each other, and an axial distance between the end of the first tightening portion and the end of the second tightening portion is 40-50 mm.

7. The nail-free support spring according to claim 1, characterized in that: The wire diameter of the torsion spring body is 2-3 mm, and the outer diameter of the torsion spring body is 15-25 mm.

8. The nail-free support spring according to claim 1, characterized in that: The included angle between the first force applying arm and the second force applying arm is 140°-150°.

9. The nail-free support spring according to claim 1, characterized in that: The torsion spring body is made of carbon steel with a carbon content of less than 0.8%.

10. A mattress, characterized in that: The invention comprises the nail-free support spring according to any one of claims 1 to 9.

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