Massage chair back folding device

Abstract

The utility model provides a massage chair back folding device which comprises a first support, a first machine core, a second support, a second machine core, a ratchet wheel type angle adjuster and a supporting rod. The first support comprises a first vertical rod and a second vertical rod which are both provided with sliding grooves, and the first machine core is rotatably connected with the two vertical rods through a first connecting shaft. The second support comprises a third vertical rod and a fourth vertical rod. The second machine core is rotatably connected with the two vertical rods through a second connecting shaft. The ratchet wheel type angle adjuster is connected with the first support and the second support so that the first support can be folded towards the seat. One ends of the two supporting rods are rotatably connected with the third vertical rod and the fourth vertical rod respectively, the other ends of the supporting rods are slidably connected with the two sliding grooves respectively, anti-sliding break angles are arranged at the upper ends of the sliding grooves, and when the first support is folded to the minimum angle, the upper ends of the supporting rods are clamped into the anti-sliding break angles and stably support the first support. According to the device, backrest folding can be achieved, space occupation during transportation is reduced, the risk of damage during transportation is reduced, and supporting is stable after folding.

Description

Technical Field

[0001] This utility model relates to the field of massage chair technology, specifically to a massage chair back folding device. Background Technology

[0002] With the widespread adoption of massage chairs, users are increasingly demanding greater convenience in product transportation, storage, and installation. Foldable designs have become a key trend in massage chair backrest design. Currently, some foldable massage chairs are available on the market, featuring segmented hinged backrests that allow for folding and storage to reduce packaging volume and lower transportation costs.

[0003] However, existing foldable massage chairs generally have significant drawbacks: they lack stable and reliable rigid support when folded, relying solely on hinges for connection. After folding, the backrest is prone to wobbling, rebounding, shifting, or even deforming. During transportation, collisions and compression can easily damage the frame and internal mechanisms. Furthermore, most folding structures cannot simultaneously accommodate angle adjustment for daily use and positioning for transport. Either angle adjustment is limited, or the locking mechanism after folding is unreliable, making it difficult to meet the multiple needs of users for comfortable massage, convenient transportation, and structural stability.

[0004] Therefore, developing a massage chair backrest folding device that can achieve backrest folding, provide stable support after folding, and is also compatible with angle adjustment has become an urgent technical problem to be solved in this field. Utility Model Content

[0005] This utility model aims to at least partially solve one of the technical problems in the aforementioned technologies. Therefore, the purpose of this utility model is to provide a massage chair backrest folding device that enables backrest folding, reducing space occupation during transportation, lowering the risk of damage during transportation, and providing stable support after folding.

[0006] To achieve the above objectives, this utility model proposes a massage chair back folding device, which includes: a first bracket, a first mechanism, a second bracket, a second mechanism, a ratchet-type angle adjuster, and a support rod;

[0007] The first support includes a first vertical rod and a second vertical rod, which are respectively disposed on both sides of the first support. Both the first vertical rod and the second vertical rod are provided with sliding grooves.

[0008] The first mechanism is rotatably connected to the first vertical rod and the second vertical rod via a first connecting shaft;

[0009] The second support is located below the first support, and the second support includes a third vertical rod and a fourth vertical rod; the third vertical rod and the fourth vertical rod are respectively arranged on both sides of the second support;

[0010] The second mechanism is rotatably connected to the third vertical rod and the fourth vertical rod via a second connecting shaft;

[0011] The ratchet-type angle adjuster connects the first bracket and the second bracket, so that the first bracket can be folded toward the seat;

[0012] The support rods are provided in two parts. One end of each support rod is rotatably connected to the third vertical rod and the fourth vertical rod, and the other end of each support rod is slidably connected to the two sliding grooves. The upper end of each sliding groove is provided with an anti-slip bend. When the first bracket is folded to its minimum angle, the upper end of each support rod engages with the anti-slip bend and provides support for the first bracket.

[0013] According to this utility model, a massage chair backrest folding device is proposed. This device splits the backrest into upper and lower sections, each equipped with an independent massage mechanism, ensuring complete massage functionality. A ratchet-type angle adjuster enables multi-angle backrest adjustment and directional folding, significantly reducing the size after folding and lowering transportation and storage costs. The support rod slides during the folding process; at the smallest folding angle, the upper end of the support rod engages with the anti-slip angle of the sliding groove, forming a rigid support to prevent wobbling and deformation, thus improving structural stability and safety.

[0014] In addition, the massage chair back folding device according to the above embodiments of this utility model may also have the following additional technical features:

[0015] Optionally, the first bracket includes a first horizontal bar and a second horizontal bar, and the first horizontal bar, the first vertical bar, the second horizontal bar and the second vertical bar are connected in sequence to form a first installation space, and the first mechanism is located in the first installation space.

[0016] Optionally, the first mechanism includes a first drive motor, a first upper massage head, and a first lower massage head. The first drive motor is located between the first upper massage head and the first lower massage head and is used to synchronously drive the first upper massage head and the first lower massage head for massage.

[0017] Optionally, the second bracket includes a third horizontal bar and a fourth horizontal bar, the third horizontal bar, the third vertical bar, the fourth horizontal bar and the fourth vertical bar are connected in sequence to form a second mounting space, and the second mechanism is located in the second mounting space.

[0018] Optionally, the second mechanism includes a second drive motor, a second upper massage head, and a second lower massage head. The second drive motor is located between the second upper massage head and the second lower massage head and is used to synchronously drive the second upper massage head and the second lower massage head for massage. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of the unfolded state of the massage chair back folding device according to an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the folding state of the massage chair back folding device according to an embodiment of the present utility model;

[0021] Explanation of reference numerals in the attached figures:

[0022] First support 1, first horizontal bar 11, first vertical bar 12, second horizontal bar 13, second vertical bar 14, slide groove 15, anti-slip angle 151, second support 2, third horizontal bar 21, third vertical bar 22, fourth horizontal bar 23, fourth vertical bar 24, ratchet angle adjuster 3, support rod 4, first mechanism 5, first drive motor 51, first upper massage head 52, first lower massage head 53, second mechanism 6, second drive motor 61, second upper massage head 62, second lower massage head 63, seat 7. Detailed Implementation

[0023] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0024] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0025] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0026] The following is for reference. Figures 1-2 The implementation method of the massage chair back folding device proposed in the embodiments of this utility model will be described in detail.

[0027] The massage chair back folding device according to an embodiment of the present utility model includes: a first bracket 1, a first mechanism 5, a second bracket 2, a second mechanism 6, a ratchet-type angle adjuster 3, and a support rod 4;

[0028] Specifically, the first support 1 includes a first vertical rod 12 and a second vertical rod 14, which are correspondingly arranged on both sides of the first support 1. Both the first vertical rod 12 and the second vertical rod 14 are provided with sliding grooves 15. The first mechanism 5 is rotatably connected to the first vertical rod 12 and the second vertical rod 14 via a first connecting shaft. The second support 2 is located below the first support 1 and includes a third vertical rod 22 and a fourth vertical rod 24, which are correspondingly arranged on both sides of the second support 2. The second mechanism 6 is rotatable via a second connecting shaft. The third vertical rod 22 and the fourth vertical rod 24 are connected; the ratchet-type angle adjuster 3 connects the first bracket 1 and the second bracket 2 so that the first bracket 1 can be folded toward the seat 7; there are two support rods 4, one end of which is rotatably connected to the third vertical rod 22 and the fourth vertical rod 24 respectively, and the other end of which is slidably connected to the two slide grooves 15 respectively. The upper end of the slide groove 15 is provided with an anti-slip bend angle 151. When the first bracket 1 is folded to the minimum angle, the upper end of the support rod 4 cooperates with the anti-slip bend angle 151 and provides support for the first bracket 1.

[0029] In other words, the first support 1 is located above the second support 2, and the two are arranged vertically to form the backrest of the massage chair. The first support 1 and the second support 2 are equipped with the first mechanism 5 and the second mechanism 6 in a one-to-one correspondence, ensuring that the folding function does not affect the original back massage function of the massage chair. The connection between the first support 1 and the second support 2 adopts a ratchet-type angle adjuster 3, which not only enables multi-angle adjustment of the first support 1 relative to the second support 2 to adapt to different user massage posture needs, but also enables the first support 1 to fold towards the main body of the massage chair seat 7. During factory packaging, warehousing, and transportation, the first support 1 can be folded 120° towards the seat 7, which greatly reduces the overall space occupied by the device, reduces packaging and transportation costs, and avoids damage to the backrest and internal mechanisms during handling. Furthermore, one end of each of the two support rods 4 is rotatably connected to the outer side of the third vertical rod 22 and the fourth vertical rod 24, respectively, while the other end of each support rod 4 is slidably connected to the outer side of the sliding grooves 15 of the first vertical rod 12 and the second vertical rod 14, respectively. When the first bracket 1 is folded to its minimum angle, the upper end of the support rod 4 engages with the anti-slip angle 151, forming a self-locking fixation. The support rod 4, the first bracket 1, and the second bracket 2 together form a stable triangular support structure, preventing the support rod 4 from accidentally slipping, ensuring stable support in the folded state, improving load-bearing capacity, and expanding the multi-functional scenarios for desktop use. When unfolding is required, simply lift the first bracket 1, and the support rod 4 automatically disengages from the anti-slip angle 151 and enters the straight sliding groove 15 to complete the unfolding process, making the operation convenient and quick.

[0030] The first mechanism 5 and the second mechanism 6 can adopt existing structures. One end of the support rod 4 is rotatably connected to the side frame of the second bracket 2 via a pin or bolt, and the other end of the support rod 4 can be slidably connected to the side frame of the first bracket 1 via a bearing or a sliding column, or it can be slidably connected to the side frame of the first bracket 1 via an existing slide rail. The ratchet angle adjuster 3 can adopt an existing ratchet and pawl structure to adjust the first bracket relative to the second bracket 2 within the range of 10° to 120°. When the adjustment angle exceeds 120°, the unlocking piece pushes the pawl to swing, causing the pawl to disengage from the ratchet, thus unfolding the first bracket 1. When the first bracket 1 is unfolded to the maximum angle, the unlocking piece releases the pawl, and the pawl contacts the ratchet again, realizing the cyclic adjustment and locking of the angle.

[0031] Therefore, the massage chair's backrest folding mechanism splits the backrest into upper and lower sections, each equipped with an independent massage mechanism to ensure complete massage functionality. The ratchet-type angle adjuster 3 enables multi-angle backrest adjustment and directional folding, significantly reducing the size after folding and lowering transportation and storage costs. The support rod 4 slides during the folding process; at the smallest folding angle, the upper end of the support rod 4 engages with the anti-slip angle 151 of the slide groove 15, forming a rigid support to prevent wobbling and deformation, thus improving structural stability and safety.

[0032] Optionally, the first support 1 includes a first horizontal bar 11 and a second horizontal bar 13. The first horizontal bar 11, the first vertical bar 12, the second horizontal bar 13, and the second vertical bar 14 are sequentially connected to form a first installation space, and the first mechanism 5 is located within the first installation space. Understandably, the first support 1, formed by the first horizontal bar 11, the first vertical bar 12, the second horizontal bar 13, and the second vertical bar 14, creates a frame-like first installation space with a regular structure and uniform load-bearing capacity. The two sides of the first mechanism 5 are rotatably connected to the first vertical bar 12 and the second vertical bar 14 via two first connecting shafts, adaptable to different massage angles and postures, while ensuring the mechanism is securely installed, improving the massage experience and structural reliability.

[0033] Optionally, the first mechanism 5 includes a first drive motor 51, a first upper massage head 52, and a first lower massage head 53. The first drive motor 51 is located between the first upper massage head 52 and the first lower massage head 53, and is used to synchronously drive the first upper massage head 52 and the first lower massage head 53 for massage. Understandably, the first mechanism 5 adopts a single-motor, dual-massage head layout, with the first drive motor 51 centrally positioned. This ensures stable and balanced power output, allowing the upper and lower massage heads to synchronously perform kneading, pushing, and other actions. This simplifies the mechanism structure, reduces the probability of failure, and ensures uniform massage intensity, meeting the user's comfortable massage needs for the upper back. Both the first upper massage head 52 and the first lower massage head 53 can utilize existing structures; for example, both can be arranged symmetrically from left to right.

[0034] Optionally, the second support 2 includes a third horizontal bar 21 and a fourth horizontal bar 23. The third horizontal bar 21, the third vertical bar 22, the fourth horizontal bar 23, and the fourth vertical bar 24 are sequentially connected to form a second mounting space, within which the second mechanism 6 is located. Understandably, the second support 2, formed by the third horizontal bar 21, the third vertical bar 22, the fourth horizontal bar 23, and the fourth vertical bar 24, creates a frame-like second mounting space, providing a reliable mounting foundation for the second mechanism 6. The two sides of the second mechanism 6 are rotatably connected to the third vertical bar 22 and the fourth vertical bar 24 via two corresponding second connecting shafts, allowing for flexible adjustment of the massage angle and enhancing the massage range and effect. Two ratchet-type angle adjusters 3 are included: one end of one ratchet-type angle adjuster 3 is connected to the first vertical bar 12, and the other end is connected to the third vertical bar 22; the other ratchet-type angle adjuster 3 is connected to the second vertical bar 14, and the other end is connected to the fourth vertical bar 24.

[0035] Optionally, the second mechanism 6 includes a second drive motor 61, a second upper massage head 62, and a second lower massage head 63. The second drive motor 61 is located between the second upper massage head 62 and the second lower massage head 63, and is used to synchronously drive the second upper massage head 62 and the second lower massage head 63 for massage. Understandably, the second mechanism 6 adopts the same drive structure as the first mechanism 5, with a single motor driving both massage heads to work synchronously, ensuring stable massage intensity and rhythm in the lower back section. It works in conjunction with the upper first mechanism 5 to achieve segmented, full-coverage back massage. The structure is simple, durable, and has low maintenance costs. The first mechanism 5 and the second mechanism 6 can be connected by a flexible or elastic band, allowing the first mechanism 5 and the second mechanism 6 to adaptively conform to the human back, improving massage comfort.

[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0041] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A folding device for the backrest of a massage chair, characterized in that: It includes a first bracket, a first mechanism, a second bracket, a second mechanism, a ratchet-type angle adjuster, and a support rod; The first support includes a first vertical rod and a second vertical rod, which are respectively disposed on both sides of the first support. Both the first vertical rod and the second vertical rod are provided with sliding grooves. The first mechanism is rotatably connected to the first vertical rod and the second vertical rod via a first connecting shaft; The second support is located below the first support, and the second support includes a third vertical rod and a fourth vertical rod; the third vertical rod and the fourth vertical rod are respectively arranged on both sides of the second support; The second mechanism is rotatably connected to the third vertical rod and the fourth vertical rod via a second connecting shaft; The ratchet-type angle adjuster connects the first bracket and the second bracket, so that the first bracket can be folded toward the seat; The support rods are provided in two parts. One end of each support rod is rotatably connected to the third vertical rod and the fourth vertical rod, and the other end of each support rod is slidably connected to the two sliding grooves. The upper end of each sliding groove is provided with an anti-slip bend. When the first bracket is folded to its minimum angle, the upper end of each support rod engages with the anti-slip bend and provides support for the first bracket.

2. The massage chair back folding device as described in claim 1, characterized in that, The first bracket includes a first horizontal bar and a second horizontal bar. The first horizontal bar, the first vertical bar, the second horizontal bar, and the second vertical bar are connected in sequence to form a first installation space. The first mechanism is located within the first installation space.

3. The massage chair back folding device as described in claim 1, characterized in that, The first mechanism includes a first drive motor, a first upper massage head, and a first lower massage head. The first drive motor is located between the first upper massage head and the first lower massage head and is used to synchronously drive the first upper massage head and the first lower massage head for massage.

4. The massage chair back folding device as described in claim 1, characterized in that, The second bracket includes a third horizontal bar and a fourth horizontal bar. The third horizontal bar, the third vertical bar, the fourth horizontal bar, and the fourth vertical bar are connected in sequence to form a second mounting space, and the second mechanism is located within the second mounting space.

5. The massage chair back folding device as described in claim 1, characterized in that, The second mechanism includes a second drive motor, a second upper massage head, and a second lower massage head. The second drive motor is located between the second upper massage head and the second lower massage head and is used to synchronously drive the second upper massage head and the second lower massage head for massage.

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