A double knot double bow spring for a spring mattress and a spring mattress

Abstract

The utility model discloses a kind of double knot double bow spring and spring mattress for spring mattress, also known as bow type spring, the double knot double bow spring for spring mattress includes end section and the middle section of being wound into multiple turns, the end section is respectively arranged in the both ends of the middle section and is connected with the middle section, the end section includes arc portion and protruding portion, the protruding portion is located on the same plane with the arc portion, the protruding portion is arranged in the both ends of the arc portion and protrudes from the side portion of the arc portion, the protruding portion of adjacent double knot double bow spring in spring mattress is connected by spring wire. The spring mattress includes the double knot double bow spring for spring mattress as described above. Compared with the existing spring with a circular arc edge, the utility model can improve the connection strength after spring connection, reduce the spring self-rotation phenomenon during the long-term compression and deformation of the mattress and the phenomenon of spring wire penetrating out of the mattress, ensure the overall supportability and aesthetics of the mattress, and prolong the service life of the mattress.

Description

Technical Field

[0001] This utility model relates to the field of spring mattress technology, and in particular to a double-knot double-bow spring for spring mattresses and a spring mattress. Background Technology

[0002] In the field of spring mattresses, springs are the core support component, and their structural design directly affects the mattress's support performance, assembly efficiency, and lifespan. Spring coiling is a crucial process in forming the spring web. During coiling, coiling wire is spirally passed between two springs to connect their sides together. Multiple coiled springs form the mattress spring web. However, current spring mattresses generally use springs of equal diameter for assembly. These springs are made of multiple turns of spring wire, each turn having an equal diameter and a smooth, rounded outer edge. This structure results in only a small overlap between the sides of two adjacent round springs (the tangent portion of the two circles), leading to weak connection stability between adjacent springs. When the sides of two adjacent springs are connected, they can rotate relative to each other under stress, making them prone to loosening. Furthermore, the connection between the two springs via a spring wire is weak. After the spring wire spirals through the two adjacent round springs, only one loop connects them. Under stress, the spring wire is prone to shifting or stretching, making it easy for it to penetrate the mattress and protrude from the side, affecting both aesthetics and safety. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a double-knot double-bow spring for spring mattresses, which can improve the connection strength after spring stringing, ensure the overall support of the mattress, improve the aesthetics of the mattress and extend its service life. To solve the above-mentioned technical problems, this utility model provides a double-knot double-bow spring for a spring mattress, including an end section and a middle section wound into multiple loops, wherein the end sections are respectively disposed at both ends of the middle section and connected to the middle section.

[0004] The end section includes an arc-shaped portion and a protruding portion. The protruding portion and the arc-shaped portion are located on the same plane. The protruding portion is disposed at both ends of the arc-shaped portion and protrudes from the side of the arc-shaped portion. In the spring mattress, the protruding portions of adjacent double-knot double-bow springs are connected to each other by spring wires.

[0005] As an improvement to the above solution, the end section further includes a first connecting portion, one end of which is connected to the end of the protrusion away from the arcuate portion, and the other end of which is connected to the middle section.

[0006] As an improvement to the above solution, the end section further includes a second connecting portion, one end of which is connected to the end of the protrusion away from the arcuate portion and located on the opposite side of the first connecting portion. The second connecting portion has an end head, which is wrapped around and connected to the portion of the first connecting portion near the middle section.

[0007] As an improvement to the above solution, the protrusion includes a connecting body and an outer protrusion. The connecting body is symmetrically disposed at both ends of the outer protrusion. One end of the connecting body is connected to the arc-shaped part, the first connecting part, or the second connecting part, and the other end of the connecting body is connected to the outer protrusion. The outer protrusion is an outwardly protruding arc structure.

[0008] As an improvement to the above solution, the protrusion includes a first protrusion and a second protrusion. The first protrusion and the second protrusion are respectively disposed at both ends of the arc-shaped portion. The spring of the end section is bent from the end to form the second connecting portion, then protrudes outward to form the first protrusion, then bends to form the arc-shaped portion, then protrudes outward to form the second protrusion, and finally bends to form the first connecting portion and passes through the end.

[0009] As an improvement to the above solution, the middle section includes at least a first variable diameter section, a second variable diameter section, and a third variable diameter section. The first variable diameter section and the third variable diameter section are respectively connected to the two ends of the second variable diameter section, and the first variable diameter section and the third variable diameter section are respectively connected to the end section.

[0010] As an improvement to the above solution, the diameters of the first variable diameter section and the third variable diameter section are equal, and the diameters of both the first variable diameter section and the third variable diameter section are larger than the diameter of the second variable diameter section.

[0011] As an improvement to the above solution, the diameters of the first variable diameter section and the third variable diameter section gradually decrease from the end closer to the end segment to the end closer to the second variable diameter section.

[0012] As an improvement to the above solution, the pitches of the first variable diameter section and the third variable diameter section are equal, and the pitches of the first variable diameter section and the third variable diameter section are both smaller than the pitch of the second variable diameter section.

[0013] This utility model also provides a spring mattress, including the double-knot double-bow spring for a spring mattress as described above.

[0014] Implementing this utility model has the following beneficial effects: This utility model relates to a double-knot double-bow spring for a spring mattress, comprising a middle section wound in multiple loops and end sections respectively disposed at both ends of the middle section and connected to it. Each end section includes an arc-shaped portion and a protruding portion. The protruding portion and the arc-shaped portion are located on the same plane. The protruding portion is disposed at both ends of the arc-shaped portion and protrudes beyond the side of the arc-shaped portion. The protruding portions of adjacent double-knot double-bow springs in the spring mattress are interconnected. Through the structure of the protruding portion protruding beyond the side of the arc-shaped portion, and the interconnection of the protruding portions of adjacent double-knot double-bow springs, compared to existing... The equal-diameter double-knot double-bow springs are connected by only a small overlap on the sides. This design provides more connection space for adjacent double-knot double-bow springs, ensuring connection strength and reducing spring rotation during long-term pressure and deformation of the mattress. It also provides more winding space for the spring wires, allowing them to wrap multiple times between the protrusions of adjacent double-knot double-bow springs. This strengthens the connection between adjacent double-knot double-bow springs and reduces the likelihood of the spring wires loosening or lengthening and protruding from the sides of the mattress during long-term pressure and deformation. This ensures the mattress's aesthetics and extends its lifespan. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the double-knot double-bow spring used in spring mattresses according to this utility model; Figure 2 This is a schematic diagram of the end section of this utility model; Figure 3 This is a schematic diagram of the middle section of this utility model; Figure 4 This is a schematic diagram of the structure of the present invention when used in a double-knot double-bow spring series spring in a spring mattress. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0017] See Figure 1 and Figure 4This utility model discloses a double-knot double-bow spring 10 for a spring mattress, also known as a bow spring, comprising an end section 1 and a middle section 2 wound into multiple loops. The end sections 1 are respectively disposed at both ends of the middle section 2 and connected to the middle section 2. The middle section 2 wound into multiple loops provides the core support foundation for the double-knot double-bow spring and is the main load-bearing part of the mattress support performance. The end sections 1, respectively disposed at both ends of the middle section 2 and connected to the middle section 2, on the one hand, realize the structural finishing at both ends of the double-knot double-bow spring 10, and on the other hand, provide the connection point for adjacent double-knot double-bow springs 10 when connecting springs.

[0018] The end section 1 includes an arc-shaped portion 11 and a protruding portion 12. The protruding portion 12 and the arc-shaped portion 11 are located on the same plane. The protruding portion 12 is located at both ends of the arc-shaped portion 11 and protrudes from the side of the arc-shaped portion 11. In the spring mattress, the protruding portions 12 of adjacent double-knot double-bow springs are connected to each other by spring wire 20. The arc-shaped portion 11 is adapted to the side arc shape of existing equal-diameter double-knot double-bow springs to ensure the smoothness of the overall structure of the double-knot double-bow spring. The protruding portion 12, located at both ends of the arc-shaped portion 11 and protruding from the side of the arc-shaped portion 11, is different from the structure of existing equal-diameter double-knot double-bow springs. The sides of existing fixed-diameter double-knot double-bow springs are all smooth arc-shaped, and adjacent double-knot double-bow springs can only be connected by a small area of ​​tangency on the side. The spring wire 20 can only be wound once, resulting in weak connection strength.

[0019] See Figure 4 When the spring mattress is assembled, the protrusions 12 of adjacent double-knot double-bow springs approach each other and are connected by the spring wire 20. Since the protrusions 12 protrude from the side of the arc-shaped part 11, a larger winding space is formed between the protrusions 12 of adjacent double-knot double-bow springs. The spring wire 20 can be wound multiple times in this space. In principle, by increasing the contact area and the number of winding turns between the spring wire 20 and the adjacent double-knot double-bow springs, the connection strength between the two is improved, thereby reducing the probability of relative displacement of adjacent double-knot double-bow springs when the mattress is subjected to pressure and deformation for a long time. Ultimately, this ensures the overall support consistency of the mattress and extends the service life of the mattress.

[0020] The beneficial effects of this utility model embodiment are as follows: This utility model embodiment uses a double-knot double-bow spring 10 for a spring mattress, which has a middle section 2 wound in multiple turns and end sections 1 respectively disposed at both ends of the middle section 2 and connected to the middle section 2. The end sections 1 include an arc-shaped portion 11 and a protruding portion 12. The protruding portion 12 and the arc-shaped portion 11 are located on the same plane. The protruding portion 12 is disposed at both ends of the arc-shaped portion 11 and protrudes from the side of the arc-shaped portion 11. The protruding portions 12 of adjacent double-knot double-bow springs in the spring mattress are interconnected; the protruding portion 12 protrudes from the arc-shaped portion 11. The side structure and the way the protrusions 12 of adjacent double-knot double-bow springs are connected to each other, compared with the existing form of double-knot double-bow springs of the same diameter that only rely on the small overlap of the side for spring connection, can provide more winding space for the spring wire 20, so that the spring wire 20 can be wound multiple times between the protrusions 12 of adjacent double-knot double-bow springs, thereby enhancing the connection strength between adjacent double-knot double-bow springs and reducing the phenomenon of relative displacement of adjacent double-knot double-bow springs during long-term pressure and deformation of the mattress; thus achieving the effect of ensuring the overall support consistency of the mattress and extending the service life of the mattress.

[0021] See Figure 2 The end segment 1 further includes a first connecting portion 13, one end of which is connected to the end of the protrusion 12 away from the arcuate portion 11, and the other end of which is connected to the middle segment 2. The first connecting portion 13 serves as a transitional connection between the end segment 1 and the middle segment 2. The first connecting portion 13 can mitigate the structural transition difference between the end segment 1 (especially the protrusion 12) and the middle segment 2, disperse the stress at the connection point, and avoid structural damage caused by stress concentration. At the same time, this transitional connection ensures the stability of the connection between the end segment 1 and the middle segment 2, prevents the end segment 1 from separating from the middle segment 2 when the double-knot double-bow spring is compressed and deformed, further improves the overall durability of the double-knot double-bow spring structure, and indirectly ensures the overall support effect of adjacent double-knot double-bow springs connected by the protrusion 12, so that the mattress can maintain stable support performance during long-term use.

[0022] The end segment 1 further includes a second connecting portion 14. One end of the second connecting portion 14 is connected to the end of the protrusion 12 away from the arc-shaped portion 11 and located on the opposite side of the first connecting portion 13. The second connecting portion 14 is provided with an end head 141. The end head 141 is wound around and connected to the part of the first connecting portion 13 near the middle segment 2 to form a connecting knot. The protrusion 12 is formed in the shape of a "bow". "Double knot double bow" means that the sides of both ends of the double knot double bow spring are provided with connecting knots, and each end is provided with two "bow" shaped protrusions 12. That is, the first connecting part 13 on one side of the protrusion 12 is connected to the middle section 2, while the second connecting part 14 on the other side of the protrusion 12 is connected to the middle section 2 through the end 141. This symmetrical connection layout can avoid the problem of imbalance in the existing double-knot double-bow spring end single connection structure. In the prior art, if the end of the double-knot double-bow spring is only connected to the middle through a single structure, it is easy to tilt on one side when subjected to force, resulting in deformation of the end structure.

[0023] On the one hand, the second connecting part 14 and the first connecting part 13 respectively provide support from both sides of the protrusion 12, which in principle can balance the lateral stress of the protrusion 12 when it is under force, and prevent the protrusion 12 from shifting due to unilateral force. On the other hand, the winding connection of the end 141 can integrate the arc-shaped part 11, the protrusion 12, the first connecting part 13 and the second connecting part 14 into the outer first layer structure, and achieve a stable connection with the middle section 2 in the second layer through the end 141, so that the outer first layer structure will not detach from the middle section 2. This structure can ensure the stability of the outer first layer structure, prevent the relative displacement of each component of the end section 1 (especially the protrusion 12) during the long-term compression deformation of the double knot double bow spring, and thus ensure that the protrusion 12 of the adjacent double knot double bow spring is always in a stable docking position, avoid the loosening of the spring wire 20 due to the displacement of the protrusion 12, maintain the connection strength advantage brought by the multiple turns of the spring wire 20, and further ensure the stability of the mattress support performance.

[0024] See Figure 2The protrusion 12 includes a connecting body 121 and an outward protrusion 122. The connecting body 121 is symmetrically arranged at both ends of the outward protrusion 122. One end of the connecting body 121 is connected to the arc-shaped portion 11, the first connecting portion 13, or the second connecting portion 14, and the other end of the connecting body 121 is connected to the outward protrusion 122. The outward protrusion 122 is an outwardly protruding arc structure. The winding force of the spring wire 20 and the compressive force of adjacent double-knot double-bow springs borne by the outward protrusion 122 can be distributed to the arc-shaped portion 11, the first connecting portion 13, or the second connecting portion 14 through the symmetrical connecting bodies 121 at both ends, avoiding stress concentration at a single connection point of the outward protrusion 122 and reducing the risk of breakage of the protrusion 12. Moreover, the arc structure can reduce the frictional loss between the spring wire 20 and the outward protrusion 122, extend the service life of the spring wire 20, indirectly ensure the long-term stability of the connection between adjacent double-knot double-bow springs, and continuously maintain the overall support consistency of the mattress.

[0025] The protrusion 12 includes a first protrusion 123 and a second protrusion 124. The first protrusion 123 and the second protrusion 124 are respectively located at both ends of the arc-shaped portion 11. The first protrusion 123 and the second protrusion 124 on both sides can respectively cooperate with the protrusion 12 of the corresponding double-knot double-bow spring to achieve "double-sided symmetrical connection". The spring of the end segment 1 adopts the following winding sequence: the spring of the end segment 1 is bent from the end 141 to form the second connecting portion 14, then protrudes outward to form the first protrusion 123, then bent to form the arc-shaped portion 11, then protrudes outward to form the second protrusion 124, and finally bent to form the first connecting portion 13 and passes through the end 141.

[0026] See Figure 3 The middle section 2 includes at least a first variable diameter section 21, a second variable diameter section 22, and a third variable diameter section 23. The first variable diameter section 21 and the third variable diameter section 23 are respectively connected to the two ends of the second variable diameter section 22, and are respectively connected to the end section 1. The first variable diameter section 21, the second variable diameter section 22, and the third variable diameter section 23 are distributed sequentially along the axial direction of the double-knot double-bow spring, and the three are coaxially arranged. This coaxial structure can ensure that the force transmission direction of each variable diameter section is consistent when the double-knot double-bow spring is under force, avoiding local stress concentration caused by eccentricity. At the same time, the first variable diameter section 21 and the third variable diameter section 23 are respectively connected to the two ends of the second variable diameter section 22, and are respectively connected to the end section 1, forming a complete axial support structure.

[0027] When a user uses the spring mattress, body pressure sequentially compresses the first variable-diameter section 21, the second variable-diameter section 22, and the third variable-diameter section 23 along the axial direction. The pressure first acts on the first variable-diameter section 21 (or the third variable-diameter section 23) closest to the mattress surface, and then gradually transfers to the second variable-diameter section 22 located in the middle. This layered force distribution mode achieves stepped pressure distribution through the structural differences of each variable-diameter section, avoiding localized overload caused by overall force on the existing fixed-diameter middle section 2. The axially distributed variable-diameter sections can specifically bear pressure at different stages, reducing localized elastic fatigue. Simultaneously, the vertical outer first-layer structure can stably bear the connecting force of adjacent double-knot double-bow springs through the spring wire 20 without interfering with the axial force of the variable-diameter sections, further ensuring the support stability and service life of the double-knot double-bow springs.

[0028] The diameters of the first variable diameter section 21 and the third variable diameter section 23 are equal, and the diameters of both the first variable diameter section 21 and the third variable diameter section 23 are larger than the diameter of the second variable diameter section 22, forming a symmetrical axial support structure that is "thick at both ends and thin in the middle". In existing fixed-diameter middle sections 2, due to their uniform diameter, the problem of "insufficient support at both ends and excessive deformation in the middle" easily occurs when subjected to axial force—the area near the ends is prone to deformation due to concentrated pressure in the initial stage of pressure transmission, while the middle area is prone to collapse due to long-term high pressure. In this application, the first variable diameter portion 21 and the third variable diameter portion 23, which have larger diameters, have stronger structural rigidity in principle: when the user applies pressure along the axial direction, the first variable diameter portion 21 (or the third variable diameter portion 23) that comes into contact first can stably bear the initial pressure due to its large diameter, avoiding excessive deformation in the end area due to insufficient support. At the same time, the pressure is evenly transmitted to the second variable diameter portion 22 through the coaxial structure. The second variable diameter portion 22, which has a smaller diameter, has more flexible elastic deformation capability, and can conform to the curve of the human body when bearing subsequent pressure, reducing local pressure concentration and improving sleep comfort.

[0029] The diameters of the first variable-diameter section 21 and the third variable-diameter section 23 gradually decrease from the end near the end segment 1 to the end near the second variable-diameter section 22. This gradual diameter characteristic ensures that when user pressure is initially applied to the larger diameter end near the end segment 1, the force is smoothly transmitted along the direction of the gradually decreasing diameter to the smaller diameter end near the second variable-diameter section 22, and then further transmitted to the second variable-diameter section 22, avoiding force transmission interruptions and stress concentration caused by abrupt diameter changes. This gradual structure retains the supporting stiffness of the first variable-diameter section 21 and the third variable-diameter section 23 near the end (the larger diameter end adapts to the initial pressure), while the reduced diameter adapts to the pressure attenuation requirements during the transition to the second variable-diameter section 22, resulting in a more uniform force distribution throughout the axial support.

[0030] The pitches of the first variable diameter section 21 and the third variable diameter section 23 are equal, and both pitches are smaller than the pitch of the second variable diameter section 22, forming an axial pitch layout of "dense at both ends and sparse in the middle". The smaller the pitch, the denser the spring wire arrangement, the higher the structural stiffness, and the more stable the initial support force; the larger the pitch, the sparser the spring wire arrangement, the larger the elastic deformation space, and the stronger the fit. When the user uses the spring mattress and the body pressure is applied sequentially along the axial direction, it presents a "gradient elastic feedback" in principle: the first variable diameter section 21 or the third variable diameter section 23 (small pitch) provides stable initial support with its dense spring wires, avoiding excessive deformation of the double-knot double-bow spring in the initial stage of force application, and preventing the user from experiencing a "collapse feeling"; then the pressure is transmitted to the second variable diameter section 22 (large pitch), whose sparse spring wire arrangement can provide a larger elastic deformation space, which can flexibly adjust the degree of deformation according to the human body curve, reduce local pressure concentration, and improve sleep comfort.

[0031] This utility model embodiment also discloses a spring mattress, including a double-knot double-bow spring 10 for a spring mattress as described above. The double-knot double-bow spring 10 for a spring mattress has a middle section 2 wound in multiple turns and end sections 1 respectively disposed at both ends of the middle section 2 and connected to the middle section 2. Each end section 1 includes an arc-shaped portion 11 and a protruding portion 12. The protruding portion 12 is located on the same plane as the arc-shaped portion 11. The protruding portion 12 is disposed at both ends of the arc-shaped portion 11 and protrudes from the side of the arc-shaped portion 11. The protruding portions 12 of adjacent double-knot double-bow springs in the spring mattress are interconnected; the protruding portion 12 protrudes from the side of the arc-shaped portion 11. The structure of the double-knot double-bow spring, and the way the protrusions 12 of adjacent double-knot double-bow springs are connected to each other, compared with the existing form of double-knot double-bow springs of the same diameter that only rely on the small overlap of the sides for spring connection, can provide more winding space for the spring wire 20, so that the spring wire 20 can be wound multiple times between the protrusions 12 of adjacent double-knot double-bow springs, thereby enhancing the connection strength between adjacent double-knot double-bow springs and reducing the phenomenon of relative displacement of adjacent double-knot double-bow springs during long-term pressure and deformation of the mattress; thus achieving the effect of ensuring the overall support consistency of the mattress and extending the service life of the mattress.

[0032] The above are preferred embodiments of the present utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications are also considered to be within the protection scope of the present utility model.

Claims

1. A double-knot double-bow spring for a spring mattress, characterized in that, It includes end sections and a middle section wound in multiple loops, wherein the end sections are respectively disposed at both ends of the middle section and connected to the middle section; The end section includes an arc-shaped portion and a protruding portion. The protruding portion and the arc-shaped portion are located on the same plane. The protruding portion is disposed at both ends of the arc-shaped portion and protrudes from the side of the arc-shaped portion. In the spring mattress, the protruding portions of adjacent double-knot double-bow springs are connected to each other by spring wires.

2. The double-knot double-bow spring for a spring mattress according to claim 1, characterized in that, The end segment further includes a first connecting portion, one end of which is connected to the end of the protrusion away from the arcuate portion, and the other end of which is connected to the middle segment.

3. The double-knot double-bow spring for a spring mattress according to claim 2, characterized in that, The end section further includes a second connecting portion, one end of which is connected to the end of the protrusion away from the arcuate portion and located on the opposite side of the first connecting portion. The second connecting portion has an end head, which is wrapped around and connected to the portion of the first connecting portion near the middle section.

4. The double-knot double-bow spring for a spring mattress according to claim 3, characterized in that, The protrusion includes a connector and an outer protrusion. The connector is symmetrically disposed at both ends of the outer protrusion. One end of the connector is connected to the arc-shaped portion, the first connector, or the second connector, and the other end of the connector is connected to the outer protrusion. The outer protrusion is an outwardly protruding arc structure.

5. The double-knot double-bow spring for a spring mattress according to claim 3, characterized in that, The protrusion includes a first protrusion and a second protrusion, which are respectively located at both ends of the arc-shaped portion. The spring of the end section is bent from the end to form the second connecting portion, then protrudes outward to form the first protrusion, then bends to form the arc-shaped portion, then protrudes outward to form the second protrusion, and finally bends to form the first connecting portion and passes through the end.

6. The double-knot double-bow spring for a spring mattress according to claim 1, characterized in that, The middle section includes at least a first variable diameter section, a second variable diameter section, and a third variable diameter section. The first variable diameter section and the third variable diameter section are respectively connected to the two ends of the second variable diameter section, and the first variable diameter section and the third variable diameter section are respectively connected to the end section.

7. The double-knot double-bow spring for a spring mattress according to claim 6, characterized in that, The diameters of the first variable diameter portion and the third variable diameter portion are equal, and the diameters of both the first variable diameter portion and the third variable diameter portion are larger than the diameter of the second variable diameter portion.

8. The double-knot double-bow spring for a spring mattress according to claim 6, characterized in that, The diameters of the first variable diameter section and the third variable diameter section gradually decrease from the end closer to the end segment to the end closer to the second variable diameter section.

9. The double-knot double-bow spring for a spring mattress according to claim 6, characterized in that, The pitches of the first variable diameter section and the third variable diameter section are equal, and the pitches of the first variable diameter section and the third variable diameter section are both less than the pitch of the second variable diameter section.

10. A spring mattress, characterized in that, Including the double-knot double-bow spring for a spring mattress as described in any one of claims 1-9.

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