Massage chair air bag spring cooperative swing driving device

Abstract

The utility model discloses a massage chair is with air bag spring cooperation swing drive arrangement, including bearing frame, motion frame and by air bag, compression spring, solenoid valve and pressure sensor constitute's drive arrangement. Air bag is divided into motion frame both sides with compression spring, through air bag inflation and push motion frame and compress compression spring energy storage, air bag deflation when compression spring release energy drive reset, thereby realize efficient, stable reciprocating swing. The utility model discloses through the flexible drive of air bag and the rigid recovery of compression spring combination, and integrated pressure sensing and solenoid valve control, effectively solved traditional drive mode response lag, strength control inaccuracy, loud noise and high energy consumption technical problem, significantly promoted the dynamic performance and use experience of massage chair.

Description

Technical Field

[0001] This utility model relates to the field of massage equipment technology, and in particular to an airbag spring coordinated rocking drive device for a massage chair. Background Technology

[0002] With the popularization of health-conscious consumption, massage chairs have become common relaxation and therapy devices in both home and commercial settings. Their core performance largely depends on the technological level of their drive system. Currently, the drive systems of massage chairs on the market are mainly divided into the following two categories: 1. Motor-driven method: This is currently the most widely used solution. It uses a motor in conjunction with gears, worm gears, or push rods to power the massage chair's rocking, tapping, and kneading movements. However, this method has significant technical drawbacks: First, the complex structure of the motor and mechanical transmission, with numerous parts, results in a bulky, costly, and inconvenient overall system; second, the motor's operating noise is typically above 65dB(A), severely interfering with the user experience; third, the motor drive response suffers from inertial lag, making it difficult to achieve precise fine-tuning of the massage intensity. The massage intensity control error is usually above ±1.2 kg, easily leading to stiff pressure or uncontrolled intensity, resulting in poor comfort.

[0003] 2. Pure Airbag Driven Method: This method uses compressed air to drive the expansion and contraction of airbags, which in turn drives the actuator. Its advantages are low operating noise and natural flexible cushioning characteristics. However, pure airbag driven method also has inherent drawbacks: the inflation and deflation process of the airbags is slow, resulting in a sluggish system response and a reciprocating motion cycle of more than 3.3 seconds, causing a disconnect in the massage rhythm; at the same time, due to the lack of rigid support and real-time feedback, its massage intensity control precision is poor, resulting in a "soft" and unstable intensity, which is difficult to meet the needs of deep muscle massage.

[0004] In summary, both motor-driven and airbag-driven massage chairs suffer from technical bottlenecks such as insufficient dynamic response, low precision in force control, and complex structure or high noise levels. These shortcomings collectively limit the improvement of massage chair performance in terms of force, precision, and comfort, making it difficult to meet users' growing demand for high-quality, personalized massage experiences.

[0005] Therefore, there is an urgent need in this field for an innovative drive device that can combine the advantages of fast response, precise force control, low noise and high reliability to overcome the shortcomings of existing technologies. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide an airbag spring coordinated rocking drive device for massage chairs.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a massage chair airbag and spring coordinated rocking drive device, comprising a support frame, a motion frame, and a drive device for driving the motion frame to reciprocate rocking relative to the support frame. The drive device includes an airbag, a compression spring, a solenoid valve, and a pressure sensor. The airbag and compression spring are respectively disposed on opposite sides of the motion frame and connected to the support frame. When the airbag is inflated by inflation, it pushes the motion frame to move and compresses the compression spring to store energy. When the airbag deflates, the compression spring releases the stored elastic potential energy, driving the motion frame to reverse and reset. The airbag is connected to an air source through an air passage pipe, and the solenoid valve is provided on the air passage pipe to control the on / off flow and direction switching of compressed air to the airbag. The pressure sensor is disposed on the air passage pipe or connected to the inner cavity of the airbag to detect its internal air pressure.

[0008] As a preferred embodiment of this utility model, the motion frame includes a base frame and swing assemblies located at both ends of the base frame. Each set of swing assemblies includes two swing arms symmetrically arranged on both sides of the base frame. The two ends of the swing arms are respectively hinged to the base frame and the motion frame, and a fixed shaft is provided between the two swing arms. One end of the airbag is connected to the motion frame, and the other end is connected to the fixed shaft of one set of swing assemblies. One end of the compression spring is connected to the motion frame, and the other end is connected to the fixed shaft of the other set of swing assemblies.

[0009] In a preferred embodiment of this invention, the airbag and the compression spring are arranged in a coaxial nested configuration.

[0010] As a preferred embodiment of the present invention, the airbag comprises, from the inside out, a polyurethane elastomer inner layer, a nylon woven mesh reinforcement layer, and a polyether-type TPU outer layer.

[0011] As a preferred embodiment of this utility model, the solenoid valve is a two-position five-way solenoid valve.

[0012] As a preferred embodiment of this utility model, the driving device further includes a controller, the signal input terminal of which is electrically connected to the signal output terminal of the air pressure sensor, and the control output terminal of which is electrically connected to the control terminal of the solenoid valve.

[0013] As a preferred embodiment of this utility model, the compression spring is a cylindrical helical compression spring, and its two ends are provided with an integrally formed hook structure.

[0014] Compared with the prior art, the beneficial effects of this utility model are: by combining the flexible drive of the airbag with the rigid return of the compression spring, and integrating air pressure sensing and solenoid valve control, it effectively solves the technical problems of slow response, inaccurate force control, high noise and high energy consumption of traditional drive methods, and significantly improves the dynamic performance and user experience of the massage chair. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the motion frame in this utility model; Figure 3 This is a schematic diagram of the swing component in this utility model; Figure 4 This is a schematic diagram of the internal structure of the airbag in this utility model.

[0016] Reference numerals: 1. Load-bearing frame; 2. Motion frame; 3. Airbag; 4. Compression spring; 5. Solenoid valve; 6. Air pressure sensor; 7. Swing assembly; 8. Swing arm; 9. Fixed shaft; 10. Polyurethane elastomer inner layer; 11. Nylon braided mesh reinforcement layer; 12. Polyether-type TPU outer layer. Detailed Implementation

[0017] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] like Figure 1-4The illustrated massage chair airbag spring-assisted rocking drive device includes a support frame 1, a motion frame 2, and a drive device for driving the motion frame 2 to reciprocate rocking relative to the support frame 1. The drive device includes an airbag 3, a compression spring 4, a solenoid valve 5, and a pressure sensor 6. The airbag 3 and the compression spring 4 are respectively disposed on opposite sides of the motion frame 2 and are respectively connected to the support frame 1. When the airbag 3 is inflated by inflation, it pushes the motion frame 2 to move and compresses the compression spring 4 to store energy. When the airbag 3 deflates, the compression spring 4 releases the stored elastic potential energy, driving the motion frame 2 to return to its original position. The airbag 3 is connected to an air source through an air passage pipe. The solenoid valve 5 is provided on the air passage pipe to control the on / off state and flow direction of compressed air to the airbag 3. The pressure sensor 6 is disposed on the air passage pipe or connected to the inner cavity of the airbag 3 to detect its internal air pressure. In this embodiment, the airbag 3 and the compression spring 4 are arranged coaxially and nested; in this embodiment, the electromagnetic valve is preferably a two-position five-way solenoid valve 5.

[0020] It should be noted that the core improvement of this application lies in the mechanical structure layout and connection relationship of the airbag 3 and the compression spring 4 working together. The air source, controller, solenoid valve 5 and air pressure sensor 6 mentioned in the text are all existing or optional supporting components for realizing the driving function of this mechanical structure. The air and circuit connection methods between them are conventional technical means known to those skilled in the art and are not the focus of this application. Therefore, the scope of protection of this application does not involve any improvement to the above-mentioned control components themselves and their connection methods, which is hereby clarified. The innovation of this application lies in the organic integration of flexible fluid drive (airbag 3) and elastic potential energy drive (compression spring 4), which not only retains the flexible buffering characteristics of airbag 3 drive, but also improves the stability and response speed of power output through the rigidity adjustment capability of compression spring 4.

[0021] By combining the flexible drive of airbag 3 with the rigid return of compression spring 4, and integrating air pressure sensing and solenoid valve 5 control, this invention effectively solves the technical problems of slow response, inaccurate force control, high noise, and high energy consumption in traditional drive methods, significantly improving the dynamic performance and user experience of massage chairs. This application can shorten the reciprocating motion cycle of the massage mechanism to 2 seconds, a 40% improvement compared to the traditional single airbag 3 drive solution (the traditional airbag 3 drive cycle is typically 3.3-3.5 seconds). Simultaneously, the system response time is controlled within 0.3 seconds, achieving instant triggering of massage actions and effectively solving the problem of "massage rhythm discontinuity" caused by the delayed inflation and deflation of traditional airbags. This improvement in dynamic performance makes the massage trajectory more closely follow the laws of human muscle movement, especially showing outstanding relaxation effects on sensitive muscle groups such as the neck and waist. This application includes, but is not limited to, the following scenarios: This device can replace the traditional rocking motor, driving the upper body of the massage chair (such as the seat cushion and backrest) to gently rock left and right through the coordinated reciprocating motion of airbag 3 and compression spring 4. Its flexible start and stop characteristics make the rocking motion smoother and more natural, while its low noise greatly enhances the user experience in relaxation or sleep-aid modes. This device is also suitable for driving massage mechanisms in massage chairs that require precise force control. Especially for areas such as the waist, hips, and thighs that require greater pushing and kneading force, this device provides a precise force output that balances gentleness and strength, achieving deep muscle massage and effectively avoiding the problems of insufficient force from pure airbag drive and harsh force from motor drive.

[0022] The motion frame 2 includes a base frame and swing components 7 located at both ends of the base frame. Each set of swing components 7 includes two swing arms 8 symmetrically arranged on both sides of the base frame. The two ends of the swing arms 8 are respectively hinged to the base frame and the motion frame 2, and a fixed shaft 9 is provided between the two swing arms 8. One end of the airbag 3 is connected to the motion frame 2, and the other end is connected to the fixed shaft 9 of one set of swing components 7. One end of the compression spring 4 is connected to the motion frame 2, and the other end is connected to the fixed shaft 9 of the other set of swing components 7. It should be noted that the "reciprocating swing motion" between the motion frame 2 and the bearing frame 1 and the specific swing components 7 described in the embodiments of this application are only a preferred embodiment for achieving coordinated drive, and are not the only limitation on the scope of protection of this utility model. Based on the "airbag 3-spring" coordinated drive architecture provided by this utility model, the motion frame 2 can also be installed on the bearing frame 1 using other conventional mechanical connection methods. For example, the motion frame 2 can be slidably installed on the bearing frame 1 through a linear guide rail, a slider mechanism, or a slide rod assembly. In such alternative embodiments, the inflation and deflation of the airbag 3 assembly, combined with the energy storage and release of the spring assembly, drives the motion frame 2 to perform reciprocating linear motion relative to the support frame 1. This linear motion can also be effectively applied to the massage functions of the massage chair, such as pushing and stretching. Any equivalent substitutions or simple modifications made to the connection method between the motion frame 2 and the support frame 1 using the core concept of "airbag 3-spring coordinated drive" described in this utility model should be considered to fall within the scope of protection of the claims of this utility model.

[0023] The airbag 3 includes a polyurethane elastomer inner layer 10, a nylon woven mesh reinforcement layer 11, and a polyether-type TPU outer layer 12 arranged sequentially from the inside to the outside.

[0024] The drive device also includes a controller, the signal input terminal of which is electrically connected to the signal output terminal of the air pressure sensor 6, and the control output terminal of which is electrically connected to the control terminal of the solenoid valve 5.

[0025] The compression spring 4 of this application is made of alloy compression spring steel, which is oil quenched and tempered to make a cylindrical helical compression spring 4, and its two ends are provided with an integrally formed hook structure.

[0026] Working principle: The controller outputs a PWM signal to open solenoid valve 5. Compressed air, after being depressurized, is injected into airbag 3 at a flow rate of 0.8 m³ / h. Airbag 3 extends axially, pushing the moving frame 2 and compressing spring 4. When the pressure sensor 6 detects that the pressure has reached the set pressure, the controller triggers solenoid valve 5 to de-energize. The pressure holding stage error is controlled within ±0.02 MPa. Deflating stage: The controller switches the position of solenoid valve 5, and airbag 3 releases pressure through the exhaust port of solenoid valve 5. Compression spring 4 rebounds and resets under the action of elastic potential energy, pushing airbag 3 to release air. When the pressure drops to the 0.5 MPa threshold, the pressure sensor 6 feeds back a signal to trigger solenoid valve 5 to switch, completing one working cycle (cycle adjustable from 3 to 5 seconds). The system is equipped with a dual protection mechanism: the air supply is cut off when the pressure exceeds 1.3 MPa, and the mechanical limit is triggered if the compression of spring 4 exceeds the set pressure.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the utility model as defined by the appended claims and their equivalents.

Claims

1. A massage chair airbag spring coordinated rocking drive device, comprising a support frame (1), a motion frame (2), and a drive device for driving the motion frame (2) to reciprocate rocking relative to the support frame (1), characterized in that: The driving device includes an airbag (3), a compression spring (4), a solenoid valve (5), and a pressure sensor (6). The airbag (3) and the compression spring (4) are respectively located on opposite sides of the moving frame (2) and are respectively connected to the supporting frame (1). When the airbag (3) is inflated by inflation, it pushes the moving frame (2) to move and compresses the compression spring (4) to store energy. When the airbag (3) deflates, the compression spring (4) releases the stored elastic potential energy and drives the moving frame (2) to reset in the opposite direction. The airbag (3) is connected to an air source through an air passage. The solenoid valve (5) is provided on the air passage to control the on / off of compressed air to the airbag (3) and the switching of the flow direction. The pressure sensor (6) is located on the air passage or connected to the inner cavity of the airbag (3) to detect its internal air pressure.

2. The airbag spring-assisted rocking drive device for a massage chair according to claim 1, characterized in that: The motion frame (2) includes a base frame and swing assemblies (7) located at both ends of the base frame. Each set of swing assemblies (7) includes two swing arms (8) symmetrically arranged on both sides of the base frame. The two ends of the swing arms (8) are respectively hinged to the base frame and the motion frame (2), and a fixed shaft (9) is provided between the two swing arms (8). One end of the airbag (3) is connected to the motion frame (2), and the other end is connected to the fixed shaft (9) of one set of swing assemblies (7). One end of the compression spring (4) is connected to the motion frame (2), and the other end is connected to the fixed shaft (9) of another set of swing assemblies (7).

3. The airbag spring-assisted rocking drive device for a massage chair according to claim 1 or 2, characterized in that: The airbag (3) and the compression spring (4) are arranged coaxially and nested.

4. The airbag spring-assisted rocking drive device for a massage chair according to claim 1, characterized in that: The airbag (3) includes a polyurethane elastomer inner layer (10), a nylon woven mesh reinforcement layer (11), and a polyether-type TPU outer layer (12) arranged sequentially from the inside to the outside.

5. The airbag spring-assisted rocking drive device for a massage chair according to claim 1, characterized in that: The solenoid valve (5) is a two-position five-way solenoid valve (5).

6. The airbag spring-assisted rocking drive device for a massage chair according to claim 1, characterized in that: The drive device also includes a controller, the signal input terminal of which is electrically connected to the signal output terminal of the air pressure sensor (6), and the control output terminal of which is electrically connected to the control terminal of the solenoid valve (5).

7. The airbag spring-assisted rocking drive device for a massage chair according to claim 1, characterized in that: The compression spring (4) is a cylindrical helical compression spring (4), and its two ends are provided with an integrally formed hook structure.

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