Alternating decompression air mattress and high-frequency welding equipment and high-frequency welding method thereof

Abstract

The present invention discloses the field of high-frequency welding machines, and specifically relates to an alternating decompression air mattress and its high-frequency welding equipment and high-frequency welding method. The alternating decompression air mattress is formed by high-frequency welding of an upper sheet, a lower sheet, a first tubular material, and a second tubular material arranged between an upper flat electrode and a lower flat electrode of the high-frequency welding equipment, wherein the first tubular material is welded to the second tubular material to form two first welds, and the second tubular material is welded to the upper sheet and the lower sheet to form two second welds. At the top and bottom of the second tubular material, the second tubular material between the first weld and the second weld is cut off to form an upper pull strap and a lower pull strap. The present application proposes a new internal structure of an alternating decompression air mattress, and proposes a high-frequency welding equipment and a high-frequency welding method to match it, which simplifies the production process and eliminates the complicated process of prefabricating independent air bags and fitting them one by one, thereby improving production efficiency.

Description

Technical Field

[0001] The invention relates to the field of high-frequency welding machines, and in particular to an alternating decompression air mattress.

[0002] The invention also relates to a high-frequency welding device for an alternating decompression air mattress.

[0003] The invention also relates to a high-frequency welding method for an alternating decompression air mattress. Background Art

[0004] Patients who are bedridden for a long time are prone to blood circulation disorders and bedsores due to continuous pressure on local tissues of the body, which seriously affects the patient's health and quality of life. To solve this problem, alternating pressure-reducing air mattresses are widely used.

[0005] The core working principle of the existing alternating pressure-reducing air mattress is to use an air pump to alternately and periodically inflate and deflate the different air cell groups of the mattress, so that at any given moment, only some of the air cells (for example, 1 / 2 to 2 / 3 of the total) are in an inflated support state, while the remaining air cells (for example, 1 / 3 to 1 / 2 of the total) are in a deflated or low-pressure state. In this way, the contact pressure points between the patient's body and the mattress are constantly changing, effectively reducing the average pressure time and pressure of local tissues, thereby achieving the pressure reduction effect of preventing bedsores.

[0006] However, in the existing manufacturing process, such air mattresses usually adopt a more complicated production process, which generally includes independently manufacturing each air bag unit that constitutes the mattress, and then fixing these pre-prepared independent air bags one by one or in groups between the upper and lower mattress bodies (i.e., the upper and lower cushion bodies) through a high-frequency heat sealing machine (high-frequency welding machine) or using adhesives. This production process is complicated and has many production links. It not only requires high positioning accuracy, but also has a limited degree of automation, resulting in low production efficiency and high manufacturing costs. Summary of the Invention

[0007] The purpose of the present invention is to provide an alternating decompression air mattress and its high-frequency welding equipment and high-frequency welding method, so as to solve the technical problems of complex process and high cost in the prior art for producing alternating decompression air mattresses.

[0008] In order to solve the above technical problems, the present invention specifically provides the following technical solutions:

[0009] 18. The mattress of claim 17, wherein the at least one auxiliary airbag is configured to be alternately inflated and deflated when the at least one auxiliary airbag is inflated and the at least one auxiliary airbag is deflated. The at least one auxiliary airbag is configured to be alternately inflated and deflated when the at least one auxiliary airbag is inflated and the at least one auxiliary airbag is deflated. The at least one auxiliary airbag is configured to be alternately inflated and deflated when the at least one auxiliary airbag is inflated and the at least one auxiliary airbag is deflated. The at least one auxiliary airbag is configured to be alternately inflated and deflated when the at least one auxiliary airbag is inflated and the at least one auxiliary airbag is deflated.

[0010] Furthermore, the auxiliary airbag is made of a first tubular material, and the upper pull belt and the lower pull belt are formed by processing a second tubular material.

[0011] Furthermore, the top and bottom of the first tubular material are respectively welded to the top and bottom of the second tubular material to form two first welds; the second tubular material is welded to the top wall and bottom wall of the main airbag to form two second welds; at the top and bottom of the second tubular material, the second tubular material between the first weld and the second weld is cut off to form an upper pull strap and a lower pull strap.

[0012] A high-frequency welding device for an alternating decompression air mattress comprises: an upper flat electrode and a lower flat electrode, and a plurality of core mold assemblies arranged between the upper and lower flat electrodes; wherein the core mold assembly comprises: an inner core mold for supporting a first tubular material from the inside; two middle core molds for clamping the assembly of the inner core mold and the first tubular material from both sides, the second tubular material being sleeved on the outside of the assembly, the middle core mold being configured as an isolator for preventing the first tubular material from welding to the top and bottom walls of the main airbag; two outer core molds for clamping the second tubular material from the outside, the outer core molds being configured as isolators for preventing the portions of the second tubular material forming the upper pull strap and the lower pull strap from welding to the top and bottom walls of the main airbag; wherein each of the outer core molds is provided with a cutting portion facing the corresponding middle core mold; and each of the middle core molds is provided with an anvil portion for cooperating with the cutting portion to shear and separate the second tubular material or to form a tear seam.

[0013] Furthermore, the first tubular material is shaped by the core mold assembly to include the following shapes: a first central portion, located in the middle of the cross-section of the first tubular material, not directly close to the upper flat electrode and the lower flat electrode; a first welding portion, formed by the top of one side of the first central portion in the horizontal direction, protruding toward the upper flat electrode; a second welding portion, formed by the bottom of the other side of the first central portion in the horizontal direction, protruding toward the lower flat electrode.

[0014] Furthermore, the second cylindrical material is shaped by the core mold assembly to include the following shapes: a second central part: located in the middle of the cross section of the second cylindrical material, wrapped around the outside of the first central part, and not directly close to the upper flat electrode and the lower flat electrode; a third fusion part: located at the top of one side of the second central part in the horizontal direction, clamped by one surface of the inner core mold and one of the outer core molds, and tightly fitted with the first fusion part of the first cylindrical material; a fourth fusion part: located at the bottom of the other side of the second central part in the horizontal direction, clamped by another surface of the inner core mold and another The outer core mold is clamped and fits tightly with the second welding part of the first tubular material; the fifth welding part: located at the top of one side of the second central part in the horizontal direction, further protrudes toward the upper flat electrode, is clamped by the surface of one of the middle core molds and the upper flat electrode to be pressed, and fits tightly with the top wall of the main airbag; the sixth welding part: located at the bottom of the other side of the second central part in the horizontal direction, further protrudes toward the lower flat electrode, is clamped by the surface of another middle core mold and the lower flat electrode to be pressed, and fits tightly with the bottom wall of the main airbag.

[0015] Furthermore, the second cylindrical material is shaped by the core mold assembly to include the following shapes: a first pre-breaking portion: located between the third welding portion and the fifth welding portion; a second pre-breaking portion: located between the fourth welding portion and the sixth welding portion.

[0016] Furthermore, it also includes two core mold positioning brackets correspondingly arranged at both ends of each core mold assembly; the inner core mold and the middle core mold are detachably fixedly connected to the core mold positioning brackets; the outer core mold is detachably rotatably connected to the two core mold positioning brackets through two rotating shafts; the high-frequency welding equipment also includes a pre-torque shaft seat that provides an initial torque for the rotating shaft, and the initial torque is used to keep the cutting part of the outer core mold separated from the anvil part of the middle core mold in a natural state.

[0017] Furthermore, the pre-torque shaft seat includes a flange sleeve, a torsion spring and an end cover; the flange sleeve is rotatably mounted on the core mold positioning bracket and is plugged into the rotating shaft of the outer core mold so that the outer core mold can rotate; the end cover is fixedly connected to the core mold positioning bracket; the torsion spring is installed between the end cover and the flange sleeve, connecting the two and being pre-tightened, thereby providing the flange sleeve with an initial torque to enable it to rotate.

[0018] A high-frequency welding method for an alternating decompression air mattress, the high-frequency welding method being performed using high-frequency welding equipment, and the high-frequency welding method comprising the following steps: S1: preparing materials: sleeve a first cylindrical material onto an inner core mold, and use two middle core molds to clamp the inner core mold and the first cylindrical material; sleeve a second cylindrical material onto the outer side of the middle core mold, and use two outer core molds to clamp the second cylindrical material; place an upper sheet and a lower sheet respectively on the top and bottom of a combination of the inner core mold, the middle core mold, the outer core mold, the first cylindrical material, and the second cylindrical material; at this time, the top and bottom of the first cylindrical material are respectively aligned with the second cylindrical material; The top and bottom of the cylindrical material are fitted together, and the other parts of the top and bottom of the second cylindrical material are fitted together with the upper sheet and the lower sheet respectively; S2: high-frequency welding and synchronous shearing: pressure and a high-frequency electric field are applied to the upper sheet, the lower sheet and the combination through the upper flat electrode and the lower flat electrode, so that: the first cylindrical material is welded to the second cylindrical material to form two first welds; the second cylindrical material is welded to the upper sheet and the lower sheet to form two second welds; at the top and bottom of the second cylindrical material, the second cylindrical material between the first weld and the second weld is cut off to form an upper pull belt and a lower pull belt.

[0019] Compared with the prior art, this application has the following beneficial effects:

[0020] This application proposes a new internal structure of an alternating pressure-reducing air mattress, and proposes matching high-frequency welding equipment and high-frequency welding methods, which simplifies the production process, eliminates the complex process of prefabricating independent air bags and fitting them one by one, and thus improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0022] Figure 1This is a schematic cross-sectional view of the alternating pressure-reducing air mattress provided in an embodiment of the present application in a fully inflated working state.

[0023] Figure 2 This is a schematic cross-sectional view of the alternating pressure-reducing air mattress provided in an embodiment of the present application in an alternating inflation working state.

[0024] Figure 3 This is a schematic diagram of the internal structure of the air mattress of an embodiment of the present application after the initial welding process.

[0025] Figure 4 This is a top view of a partial structure of the high-frequency welding equipment provided in an embodiment of the present application.

[0026] Figure 5 for Figure 4 Cross-sectional view in the AA direction.

[0027] Figure 6 for Figure 5 A local enlarged view of point B.

[0028] Figure 7 for Figure 6 A three-dimensional assembly diagram of the core mold assembly is shown.

[0029] Figure 8 for Figure 6 A schematic diagram of the state of the core mold assembly before high-frequency welding is shown.

[0030] Figure 9 This is a schematic diagram of the shapes of the upper sheet, the second tubular material, the first tubular material, and the lower sheet after welding is completed and the core mold assembly is pulled out of the embodiment of the present application.

[0031] Figure 10 for Figure 9 A partial enlarged view of point C.

[0032] The numbers in the figure represent the following:

[0033] 1-main airbag; 11-upper sheet; 12-lower sheet; 2-auxiliary airbag; 21-upper pull belt; 22-lower pull belt; 3-upper flat electrode; 4-lower flat electrode; 5-core mold assembly; 51-inner core mold; 52-middle core mold; 521-anvil part; 53-outer core mold; 531-cutter part; 532-rotating shaft; 54-core mold positioning bracket; 55-pre-torque shaft seat; 551-flange sleeve; 552-torsion spring; 553-end cover; 6-first tubular material; 61-first central part; 62-first welding part; 63-second welding part; 7-second tubular material; 71-second central part; 72-third welding part; 73-fourth welding part; 74-fifth welding part; 75-sixth welding part; 76-first pre-breaking part; 77-second pre-breaking part. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] (Instructions for alternating pressure-reducing air mattresses)

[0036] Please refer to Figure 1 and Figure 2 , which shows the cross-sectional structure of an alternating pressure-reducing air mattress disclosed in an embodiment of the present application.

[0037] The alternating decompression air mattress comprises an integral main airbag 1 and a plurality of auxiliary airbags 2 arranged inside the main airbag 1 .

[0038] The main airbag 1 forms the outer contour of the mattress and has a top wall (upper sheet 11) and a bottom wall (lower sheet 12).

[0039] Multiple auxiliary airbags 2 are arranged side by side along the length or width direction of the main airbag 1. The top of each auxiliary airbag 2 is connected to the inner side of the top wall of the main airbag 1 through at least one upper pull strap 21. At the same time, its bottom is connected to the inner side of the bottom wall of the main airbag 1 through at least one lower pull strap 22.

[0040] Each auxiliary airbag 2 is equipped with an independent air circuit interface (not shown), so that its inflation and deflation states can be independently controlled by an external air pump.

[0041] The working principle of the air mattress of the present application is to alternately control the auxiliary airbag 2, for example Figure 2 As shown:

[0042] The odd-numbered auxiliary airbags 2 are defined as the first group, and are inflated to maintain high pressure. The internal air pressure causes the cross-section of the auxiliary airbag 2 to tend to expand into a circle. Due to the restraining effect of the drawstring, the auxiliary airbag 2 will pull the top wall and bottom wall of the main airbag 1 toward the auxiliary airbag 2 itself through the upper drawstring 21 and the lower drawstring 22 at the top and bottom while expanding laterally, resulting in a decrease in the overall local thickness of the entire mattress at the location where the inflated auxiliary airbag 2 is located.

[0043] The auxiliary airbags 2 with even numbers are defined as the second group. They are deflated to maintain low pressure. The internal air pressure causes the cross-section of the auxiliary airbags 2 to become a vertical ellipse or flat shape with a higher height and a narrower width under the action of external force (the internal air pressure of the main airbag 1). This form of the auxiliary airbag 2 hardly generates any tension on the upper and lower pull straps 21 and 22, thereby allowing the top and bottom walls of the main airbag 1 to move away from each other at this position, thereby causing the local overall thickness of the entire mattress to increase at the location where the deflated auxiliary airbags 2 are located.

[0044] By periodically switching the inflation and deflation states of the first and second groups of auxiliary airbags 2, regular bulges and depressions occur in the corresponding areas of the mattress surface, thereby changing the contact state between the patient's body and the mattress, achieving dynamic redistribution of pressure, and achieving the same decompression effect as the traditional design.

[0045] (Explanation of high-frequency welding equipment and high-frequency welding methods)

[0046] In order to manufacture the above-mentioned alternating decompression air mattress efficiently and at low cost, a special high-frequency welding device and a high-frequency welding method are proposed below. The core advantage of both is that they can directly form the above-mentioned alternating decompression air mattress through a single high-frequency welding operation. Figure 3 The key internal structure of the air mattress is shown.

[0047] Reference Figure 3 This structure is a semi-finished product, and the upper sheet 11 of the main airbag 1, the upper pull belt 21, the auxiliary airbag 2, the lower pull belt 22 and the lower sheet 12 of the main airbag 1 have been integrally welded inside.

[0048] After this structure is formed, only one simple welding process is required to weld and seal the edges of the upper sheet 11 and the lower sheet 12 of the main airbag 1, as well as the two ends of the auxiliary airbag 2, to form the structural prototype of the air mattress. Subsequently, only holes need to be drilled and the air supply pipeline needs to be installed to complete the manufacture of the entire mattress.

[0049] The following describes the implementation in detail Figure 3 High-frequency welding equipment and high-frequency welding method of the structure shown.

[0050] Reference Figures 4 to 8The high-frequency welding equipment mainly includes: an upper flat electrode 3, a lower flat electrode 4, and a core mold assembly 5 arranged between the upper flat electrode 3 and the lower flat electrode 4.

[0051] Reference Figure 5 and Figure 6 The core mold assembly 5 is the core of the device, which includes at least one inner core mold 51, two middle core molds 52 and two outer core molds 53.

[0052] The raw materials used for welding include: a first cylindrical material 6, a second cylindrical material 7, an upper sheet 11 and a lower sheet 12. These materials are usually thermoplastic materials such as PVC and TPU that are suitable for high-frequency welding.

[0053] The preparation and material shaping process before welding are as follows:

[0054] The first cylindrical material 6 is pre-sheathed on the outer periphery of the inner core mold 51 , and then the two middle core molds 52 clamp the inner core mold 51 sheathed with the first cylindrical material 6 from both sides.

[0055] Under the joint restraint and shaping action of the inner core mold 51 and the middle core mold 52, the first cylindrical material 6 is precisely shaped into a structure having the following specific cross-sectional shape:

[0056] The first central portion 61 is located in the middle of the cross section and is not directly close to the upper flat electrode 3 and the lower flat electrode 4 . This portion will eventually form the main body of the auxiliary airbag 2 .

[0057] The first weld portion 62 is formed by the top portion of one side of the first central portion 61 in the horizontal direction, protruding toward the upper flat electrode 3 .

[0058] The second weld portion 63 is formed by the bottom portion of the other side of the first central portion 61 in the horizontal direction, and is protruded toward the lower flat electrode 4 .

[0059] The second cylindrical material 7 is sleeved on the outside of the combined first cylindrical material 6 and the middle core mold 52, and then the two outer core molds 53 clamp it from the outside.

[0060] At this time, the second cylindrical material 7 is formed into a structure with a more complex cross-sectional shape under the joint action of the inner core mold 51, the middle core mold 52 and the outer core mold 53:

[0061] The second central portion 71 is located in the middle of the cross section, wrapped around the outside of the first central portion 61 and not directly close to the upper flat electrode 3 and the lower flat electrode 4. This portion will be cut in two places in the subsequent process to eventually form the upper pull belt 21 and the lower pull belt 22.

[0062] The third welding part 72: located at the top of one side in the horizontal direction of the second central part 71, it is clamped by a surface of the inner core mold 51 and an outer core mold 53, and is tightly fitted with the first welding part 62 of the first tubular material 6. This part eventually forms the part connecting the auxiliary airbag 2 and the lower pull belt 22.

[0063] The fourth welding part 73: is located at the bottom of the other side of the second center part 71 in the horizontal direction, is clamped by the other surface of the inner core mold 51 and the other outer core mold 53, and is tightly fitted with the second welding part 63 of the first tubular material 6. This part eventually forms the part connecting the auxiliary airbag 2 and the upper pull belt 21.

[0064] It should be noted that after the upper sheet 11 and the lower sheet 12 are fully deployed, the auxiliary airbag 2 rotates 180 degrees, so that the third welded portion 72 moves to the bottom of the auxiliary airbag 2 and the fourth welded portion 73 moves to the top of the auxiliary airbag 2 .

[0065] The fifth welding part 74: located at the top of one side in the horizontal direction of the second central part 71, further protrudes toward the upper flat electrode 3, is clamped by the surface of a central core mold 52 and the upper flat electrode 3 to be pressed, and is tightly fitted with the upper sheet 11, finally forming a part connecting the upper pull belt 21 and the upper sheet 11.

[0066] The sixth welding part 75: located at the bottom of the other side in the horizontal direction of the second center part 71, further protrudes toward the lower flat electrode 4, is clamped by the surface of another core mold 52 and the lower flat electrode 4 to be pressed, and is tightly fitted with the lower sheet 12. This part eventually forms the part connecting the lower pull belt 22 and the lower sheet 12.

[0067] The first pre-breaking portion 76: This is a specially designed weak area on the second tubular material 7, located between the third welding portion 72 and the fifth welding portion 74. During the subsequent pressurization process, this portion will be cut by the sharp edge structure between an outer core mold 53 and a middle core mold 52, or form a tear seam that is easy to break.

[0068] The second pre-breaking portion 77 is similar to the first pre-breaking portion 76 and is located between the fourth welding portion 73 and the sixth welding portion 75 . The second pre-breaking portion 77 will be cut by the sharp edge structure between the other outer core mold 53 and the other middle core mold 52 , or form a tear seam that is easy to break.

[0069] In order to achieve the above-mentioned precise cutting function, each outer core mold 53 is provided with a cutting portion 531 (for example, a sharp raised edge) on the side facing the corresponding middle core mold 52, and each middle core mold 52 is provided with an anvil portion 521 at the corresponding position, which is used to cooperate with the cutting portion 531 to complete the shearing action of the second cylindrical material 7.

[0070] High frequency welding and synchronous cutting process:

[0071] Reference Figure 6 and Figure 8 When everything is ready, the upper plate electrode 3 and the lower plate electrode 4 are energized and move toward each other, applying pressure and a high-frequency electric field to the core mold assembly 5 and all materials to be welded.

[0072] During this process, the outer core mold 53 plays the role of a key thermal insulation component. It is arranged between the third welding part 72 and the upper sheet 11, and between the fourth welding part 73 and the lower sheet 12, effectively preventing heat transfer and high-frequency energy coupling between these areas, thereby ensuring that the third welding part 72 is not welded to the upper sheet 11, and the fourth welding part 73 is not welded to the lower sheet 12.

[0073] Similarly, the central core mold 52 also acts as a heat insulator, which separates the second central portion 71 from the first central portion 61 and ensures that the fifth weld portion 74 and the sixth weld portion 75 will not be welded to the first central portion 61 .

[0074] refer to Figure 9 and Figure 10 After welding and cutting are completed, the upper plate electrode 3 and the lower plate electrode 4 (together with the upper sheet 11 and the lower sheet 12) are separated from the core mold assembly 5. At this time, since the pre-broken part has been cut off, or the tear seam is formed and then pulled apart, the second cylindrical material 7 that was originally connected as a whole is divided into an upper pull belt 21 and a lower pull belt 22. When the upper sheet 11 and the lower sheet 12 are separated from each other, their internal structure naturally unfolds to form a Figure 3 The ideal form shown.

[0075] (Detailed description of core mold assembly 5)

[0076] In order to further optimize the performance and operational convenience of the above-mentioned equipment, the present application also provides a preferred core mold assembly 5 structure.

[0077] Please refer again Figure 6 、 Figure 7 and Figure 8 .

[0078] In a specific embodiment, the cross-section of the inner core mold 51 is roughly rectangular, and a chamfer or avoidance notch is provided at one of its diagonal positions, which is referred to as the first notch. The uncut top wall and bottom wall of the inner core mold 51 are respectively used to stably support the first welding part 62 and the second welding part 63 of the first tubular material 6.

[0079] The two middle core molds 52 are designed to be embedded in and installed in the inside of the two first notched corners. The two outer core molds 53 are installed on the outside of the relatively straight wall of the inner core mold 51 without cutting.

[0080] Finally, the shape of the first tubular material 6, the inner core mold 51, the middle core mold 52, the outer core mold 53 and the second tubular material 7 after being assembled is a rectangular strip with a smooth surface.

[0081] Furthermore, in order to ensure assembly accuracy and operational stability, the core mold assembly 5 also includes a core mold positioning bracket 54 arranged at both ends of the inner core mold 51, which is used to connect the inner core mold 51, the middle core mold 52, and the outer core mold 53, and fix the entire assembly to the frame.

[0082] The inner core mold 51 and the middle core mold 52 can be fixed to the core mold positioning bracket 54 by plugging, and the outer core mold 53 and the core mold positioning bracket 54 are rotatably plugged.

[0083] Specifically, a rotating shaft 532 is provided at both ends of the outer core mold 53, on the side away from the cutter part 531. The rotating shaft 532 is connected to a pre-torque shaft seat 55 preset on the core mold positioning bracket 54. The pre-torque shaft seat 55 is used to provide an initial torque for the rotating shaft 532 to keep the cutter part 531 away from the second cylindrical material 7, thereby avoiding the problem that the cutter part 531 may prematurely cut the second cylindrical material 7 due to gravity or accidental touch before welding.

[0084] The pre-torque shaft seat 55 includes a flange sleeve 551 , a torsion spring 552 and an end cover 553 .

[0085] The flange sleeve 551 is rotatably mounted on the core mold positioning bracket 54 and is plugged into the rotating shaft 532 of the outer core mold 53 so that the outer core mold 53 can rotate accordingly.

[0086] The end cover 553 is fixedly connected to the core mold positioning bracket 54 .

[0087] The torsion spring 552 is installed between the end cover 553 and the flange sleeve 551 to connect the two and is pre-tightened, thereby providing an initial torque for the flange sleeve 551 to rotate.

[0088] The direction of the torque provided by the torsion spring 552 ensures that the cutter portion 531 of the outer core mold 53 always maintains a posture separated from the anvil portion 521 of the middle core mold 52 in a natural state, thereby effectively avoiding any damage or pre-cutting of the second tubular material 7 before welding and clamping.

[0089] During the welding operation, when the upper flat electrode 3 and the lower flat electrode 4 begin to clamp the core mold assembly 5, the outer core mold 53 will be subjected to pressure from the electrode, and this pressure will generate a torque opposite to the preset torque of the torsion spring 552. When the pressure is large enough, it can overcome the resistance of the torsion spring 552, forcing the outer core mold 53 to rotate, and finally making its cutting portion 531 accurately press against the anvil portion 521, completing the shearing of the second cylindrical material 7.

[0090] It is worth noting that when the shearing action occurs, the areas on both sides of the first pre-breaking portion 76 and the second pre-breaking portion 77 have been firmly clamped by the electrode and the mold, which ensures the stability and accuracy of the shearing process and avoids any undesirable displacement of the material before welding is completed.

[0091] In summary, this application has greatly simplified the production process by innovatively designing the internal structure of the alternating pressure-reducing air mattress and developing a matching efficient, integrated single-shot high-frequency welding forming equipment and method, eliminating the complex process of prefabricating independent airbags and fitting them one by one, thereby significantly improving production efficiency and reducing manufacturing costs.

[0092] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the spirit and scope of protection of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the embodiments of the present invention.

Claims

1. An alternating decompression air mattress, characterized in that: include: A main airbag (1), the main airbag (1) having a top wall and a bottom wall; A plurality of auxiliary airbags (2), the auxiliary airbags (2) being arranged side by side inside the main airbag (1); and A plurality of upper pull straps (21) and a plurality of lower pull straps (22); The top of each auxiliary airbag (2) is connected to the inner side of the top wall of the main airbag (1) through at least one upper pull belt (21), and the bottom of each auxiliary airbag (2) is connected to the inner side of the bottom wall of the main airbag (1) through at least one lower pull belt (22); The plurality of auxiliary airbags (2) are configured to be alternately inflated and deflated; When part of the auxiliary airbag (2) is inflated, it pulls the top wall and the bottom wall of the main airbag (1) inward through the upper pull belt (21) and the lower pull belt (22) to reduce the overall thickness of the mattress at the location where it is located; When another portion of the auxiliary airbag (2) is deflated, it allows the top wall and the bottom wall of the main airbag (1) to move away from each other, thereby increasing the overall thickness of the mattress at the location thereof.

2. The alternating pressure-reducing air mattress according to claim 1, characterized in that: The auxiliary airbag (2) is made of a first tubular material (6), and the upper pull belt (21) and the lower pull belt (22) are formed by processing a second tubular material (7).

3. The alternating pressure-reducing air mattress according to claim 2, characterized in that: The top and bottom of the first tubular material (6) are respectively welded to the top and bottom of the second tubular material (7), thereby forming two first welds; The second tubular material (7) is welded to the top wall and the bottom wall of the main airbag (1), thereby forming two second welds; At the top and bottom of the second tubular material (7), the second tubular material (7) between the first weld and the second weld is cut, thereby forming an upper pull belt (21) and a lower pull belt (22).

4. A high-frequency welding device for an alternating decompression air mattress according to any one of claims 1 to 3, It is characterized by: include: An upper flat electrode (3) and a lower flat electrode (4), and a plurality of core mold components (5) arranged between the upper flat electrode (3) and the lower flat electrode (4); Wherein, the core mold assembly (5) comprises: an inner core mold (51) for supporting the first cylindrical material (6) from the inside; Two central core molds (52) are used to clamp the assembly of the inner core mold (51) and the first tubular material (6) from both sides, the second tubular material (7) is sleeved on the outside of the assembly, and the central core mold (52) is configured as an isolation member to prevent the first tubular material (6) from being welded to the top wall and the bottom wall of the main airbag (1); Two outer core molds (53) for clamping the second tubular material (7) from the outside, the outer core molds (53) being configured as spacers for preventing the portion of the second tubular material (7) forming the upper pull belt (21) and the lower pull belt (22) from being welded to the top wall and the bottom wall of the main airbag (1); in, Each of the outer core molds (53) is provided with a cutting portion (531) facing the corresponding middle core mold (52); Each of the central core molds (52) is provided with an anvil portion (521) for cooperating with the cutting knife portion (531) to shear and separate the second cylindrical material (7) or to form a tear seam.

5. The high frequency welding equipment according to claim 4, characterized in that: The first cylindrical material (6) is shaped by the core mold assembly (5) into the following shape: A first central portion (61) is located in the middle of the cross section of the first cylindrical material (6) and is not directly adjacent to the upper flat electrode (3) and the lower flat electrode (4); A first welding portion (62) is formed by a top portion of one side of the first central portion (61) in the horizontal direction, protruding toward the upper flat electrode (3); The second welding portion (63) is formed by the bottom portion of the other side of the first central portion (61) in the horizontal direction, protruding toward the lower flat electrode (4).

6. The high frequency welding equipment according to claim 5, characterized in that: The second cylindrical material (7) is shaped by the core mold assembly (5) into the following shape: A second central portion (71): located in the middle of the cross section of the second cylindrical material (7), wrapped around the outside of the first central portion (61), and not directly close to the upper flat electrode (3) and the lower flat electrode (4); The third welding portion (72) is located at the top of one side of the second central portion (71) in the horizontal direction, is clamped by a surface of the inner core mold (51) and one of the outer core molds (53), and is closely fitted with the first welding portion (62) of the first tubular material (6); The fourth welded portion (73) is located at the bottom of the other side of the second central portion (71) in the horizontal direction, is clamped by the other surface of the inner core mold (51) and the other outer core mold (53), and is closely fitted with the second welded portion (63) of the first tubular material (6); A fifth welding portion (74): located at the top of one side in the horizontal direction of the second central portion (71), further protruding toward the upper flat electrode (3), clamped by the surface of one of the core molds (52) and the upper flat electrode (3) to be pressed, and closely fitted with the top wall of the main airbag (1); The sixth welding portion (75) is located at the bottom of the other side of the second central portion (71) in the horizontal direction, further protrudes toward the lower flat electrode (4), is clamped by the surface of the other core mold (52) and the lower flat electrode (4) to be pressed, and is tightly fitted with the bottom wall of the main airbag (1).

7. The high frequency welding equipment according to claim 6, characterized in that: The second cylindrical material (7) is shaped by the core mold assembly (5) to also include the following shapes: A first pre-breaking portion (76): located between the third weld portion (72) and the fifth weld portion (74); The second pre-breaking portion (77) is located between the fourth welding portion (73) and the sixth welding portion (75).

8. The high frequency welding equipment according to claim 4, characterized in that: It also includes two core mold positioning brackets (54) correspondingly arranged at both ends of each core mold assembly (5); The inner core mold (51) and the middle core mold (52) are detachably fixedly connected to the core mold positioning bracket (54); The outer core mold (53) is detachably and rotatably connected to the two core mold positioning brackets (54) via two rotating shafts (532); The high-frequency welding equipment further comprises a pre-torque shaft seat (55) for providing an initial torque for the rotating shaft (532), wherein the initial torque is used to keep the cutting portion (531) of the outer core mold (53) separated from the anvil portion (521) of the middle core mold (52) in a natural state.

9. The high frequency welding equipment according to claim 8, characterized in that: The pre-torque shaft seat (55) includes a flange sleeve (551), a torsion spring (552) and an end cover (553); The flange sleeve (551) is rotatably mounted on the core mold positioning bracket (54) and is plugged into the rotating shaft (532) of the outer core mold (53), so that the outer core mold (53) can rotate; The end cover (553) is fixedly connected to the core mold positioning bracket (54); The torsion spring (552) is installed between the end cover (553) and the flange sleeve (551), connecting the two and being pre-tightened, thereby providing an initial torque for the flange sleeve (551) to rotate.

10. A high-frequency welding method for an alternating decompression air mattress according to any one of claims 1 to 3, characterized in that: The high-frequency welding method is performed using the high-frequency welding equipment according to any one of claims 4 to 9, and the high-frequency welding method includes the following steps: S1: Prepare materials: The first cylindrical material (6) is sleeved on an inner core mold (51), and two middle core molds (52) are used to clamp the inner core mold (51) and the first cylindrical material (6); The second cylindrical material (7) is sleeved on the outer side of the central core mold (52), and the second cylindrical material (7) is clamped by two outer core molds (53); An upper sheet (11) and a lower sheet (12) are respectively placed on the top and bottom of a combination of the inner core mold (51), the middle core mold (52), the outer core mold (53), the first tubular material (6) and the second tubular material (7); At this time, the top and bottom of the first tubular material (6) are respectively bonded to the top and bottom of the second tubular material (7), and the other parts of the top and bottom of the second tubular material (7) are respectively bonded to the upper sheet (11) and the lower sheet (12); S2: High-frequency welding and synchronous shearing: Pressure and a high-frequency electric field are applied to the upper sheet (11), the lower sheet (12) and the assembly through the upper plate electrode (3) and the lower plate electrode (4), so that: The first tubular material (6) and the second tubular material (7) are welded to form two first welds; The second cylindrical material (7) is welded to the upper sheet (11) and the lower sheet (12), thereby forming two second welds; At the top and bottom of the second tubular material (7), the second tubular material (7) is cut between the first weld and the second weld to form an upper pull belt (21) and a lower pull belt (22).

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