Massage chair with angle-variable backrest
By setting a preset distance range between the center of the backrest rotation and the apex of the bottom end of the backrest pad on the massage chair, the shoulder and back displacement is solved, and the identification error caused by the change of the shoulder and back position during the backrest rotation of the existing massage chair is solved, and the recognition error caused by the change of the shoulder and back position during the backrest rotation is improved. Continuity and user experience of massage procedures.
Patent Information
- Application Number
- CN202222446417.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2022-09-15
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2032-09-15
AI Technical Summary
During the rotation of the backrest, the change in the shoulder and back position of the existing variable angle massage chair leads to identification errors, affecting the design and user experience of the massage program.
By setting the distance between the rotation center of the backrest and the apex of the bottom end of the backrest pad within the first preset distance to the second preset distance, the displacement of the shoulder and back is reduced, and the massage program can avoid re-identifying the human body, and using a rotating rod and a rotating frame Mechanical structures such as drive cylinders realize control of this spacing.
It effectively reduces the displacement of the shoulder and back during the backrest rotation, ensures the continuity of the massage procedure and user experience, and avoids unfriendly massage problems caused by excessive displacement.
Smart Images
Figure CN222150446U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a massage chair with a variable backrest angle. Background Art
[0002] Currently, variable-angle massage chairs on the market have separate back and seat parts that perform circular motion around a rotation center. For example, the Chinese utility model patent application number 202011303292.8, titled "Multi-angle Adjustable Back Massage Chair," includes a movement, a chair frame, and a rack. The chair frame includes a seat frame and a back frame, one end of the seat frame being hinged to one end of the back frame, and the back frame rotates relative to the seat frame to form a rotation plane. The rack is fixed to the seat frame and the back frame, with the teeth on the rack oriented perpendicular to the rotation plane. The movement is set on one side of the rack, with the teeth on the rack facing the movement. The movement is provided with a running gear meshing with the rack. Rotating the running gear can drive the movement to move back and forth along the rack. The rack is made of elastic material.
[0003] However, this type of massage chair has a problem. When a person sits on the seat, the shoulders and back of the human body will be stretched as the backrest rotates. This will cause the position of the shoulders and back to change, which can easily lead to errors in shoulder and back recognition. The position of the human shoulder and back will move differently depending on the angle of the backrest rotation. For details, please refer to Figures 1 to 4 , Figure 1 The state of the human body when the backrest has not been adjusted, at this time the distance e' between the bottom vertex of the backrest cushion and the left vertex of the seat cushion is small; Figure 3 and Figure 4 When the backrest is adjusted to its maximum rearward angle, the distance E' between the bottom vertex of the backrest cushion and the left vertex of the seat cushion reaches its maximum. At this point, the shoulders and back are stretched as the backrest rotates downward, causing them to shift downward. This is detrimental to the design of the massage program, as each shoulder movement requires a new body recognition, making the massage technique very unfriendly.
[0004] And, from Figure 2 and Figure 4 It can be seen that the greater the distance between the rotation center of the backrest and the vertex of the bottom end of the backrest cushion, the greater the distance between the vertex of the bottom end of the backrest cushion and the vertex of the left end of the seat cushion, that is, E' is greater than e'. If the difference between E'-e' is greater than 20 mm, it is easy for the shoulders and back to move more significantly. Utility Model Content
[0005] The present invention provides a massage chair with a variable backrest angle, which overcomes the shortcomings of the prior art. The technical solution adopted by the present invention to solve the technical problem is:
[0006] A massage chair with a variable backrest angle comprises a seat and a backrest, wherein the seat comprises a seat frame and a seat cushion mounted on the seat frame, and the backrest comprises a backrest frame and a backrest cushion mounted on the backrest frame. The backrest can rotate relative to the seat, and the distance between the rotation center of the backrest and the vertex of the bottom end of the backrest cushion is greater than or equal to a first preset distance and less than or equal to a second preset distance, so as to reduce the displacement of the human shoulder and back caused by the rotation of the backrest, thereby avoiding the massage program from re-identifying the human shoulder and back.
[0007] In a preferred embodiment, the distance between the rotation center of the backrest and the top point of the bottom end of the backrest cushion is greater than or equal to a first preset distance and less than or equal to a third preset distance, and the third preset distance is less than the second preset distance.
[0008] In a preferred embodiment, the distance between the rotation center of the backrest portion and the top point of the bottom end of the backrest cushion is a fourth preset distance, and the fourth preset distance is greater than the first preset distance and less than the third preset distance.
[0009] In a preferred embodiment, the first preset distance is 10 mm, the second preset distance is 100 mm, the third preset distance is 80 mm, and the fourth preset distance is 55 mm.
[0010] In a preferred embodiment: the seat frame is provided with a rotating rod extending upward, the top end of the rotating rod is provided with a first axial hole, and the first axial hole is located in the backrest; the backrest also includes a rotating frame, the rotating frame is provided with a second axial hole, and is further provided with a rotating shaft, the rotating shaft is riveted to the first axial hole and the second axial hole so that the rotating frame can rotate relative to the rotating rod; a rotating drive component is further provided, which is mounted on the seat frame and is transmission-connected to the rotating frame.
[0011] In a preferred embodiment, the rotating rod is arranged perpendicular to the top surface of the seat frame.
[0012] In a preferred embodiment, two spaced-apart lugs are provided at the bottom of the rotating frame, and the rotating driving member is a driving cylinder, the cylinder body of the driving cylinder is connected to the base frame, and the piston rod is located between the two lugs and is hingedly connected to the two lugs.
[0013] In a preferred embodiment, the rotating frame is further provided with a transmission rod, the end of which is hingedly connected to the backrest frame.
[0014] In a preferred embodiment: the seat frame is provided with an upwardly extending rotating rod, the top end of the rotating rod is provided with a first axial hole, and the first axial hole is located in the seat cushion; the backrest portion also includes a rotating frame and a rotating matching rod, the rotating matching rod is fixed to the backrest frame and is provided with a second axial hole, and is further provided with a rotating shaft, which is riveted to the first axial hole and the second axial hole so that the rotating matching rod can rotate relative to the rotating rod; a rotating driving member is further provided, which is hingedly connected to the seat frame and is transmission-connected to the backrest frame through the rotating frame.
[0015] In a preferred embodiment: two spaced-apart lugs are provided at the bottom end of the rotating frame, the rotating driving member is a driving cylinder, the cylinder body of the driving cylinder is provided with a connecting plate, the connecting plate is located between the two lugs and is hingedly connected to the two lugs, and the piston rod of the driving cylinder is hingedly connected to the base frame.
[0016] Compared with the background technology, this technical solution has the following advantages:
[0017] The distance between the rotation center of the backrest and the vertex of the bottom end of the backrest cushion is greater than or equal to a first predetermined distance and less than or equal to a second predetermined distance, such that: when the backrest is adjusted rearward to its maximum angle, the difference between the distance E between the vertex of the bottom end of the backrest cushion and the vertex of the left end of the seat cushion and the distance e between the vertex of the bottom end of the backrest cushion and the vertex of the left end of the seat cushion when the backrest is not adjusted is less than 20 mm, that is, Ee ≤ 20 mm. This minimizes the displacement of the shoulders and back of the user as the backrest rotates, facilitating massage program design and eliminating the need for re-recognition of the user. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0019] Figure 1 The figure shows the overall schematic diagram of a massage chair in the prior art when the backrest has not been adjusted.
[0020] Figure 2 Draws Figure 1 Schematic diagram of the relationship between the bottom vertex of the middle backrest and the left vertex of the seat.
[0021] Figure 3 The figure shows an overall schematic diagram of a massage chair in the prior art when the backrest is adjusted to the maximum angle.
[0022] Figure 4 Draws Figure 3 Schematic diagram of the relationship between the bottom vertex of the middle backrest and the left vertex of the seat.
[0023] Figure 5 The figure shows the overall schematic diagram of the backrest in the present application when the angle has not been adjusted.
[0024] Figure 6 Draws Figure 5 Schematic diagram of the relationship between the bottom vertex of the middle backrest, the left vertex of the seat, and the center of rotation.
[0025] Figure 7 The figure shows the overall schematic diagram of the backrest in the present application when it is adjusted to the maximum angle.
[0026] Figure 8 Draws Figure 7 Schematic diagram of the relationship between the bottom vertex of the middle backrest, the left vertex of the seat, and the center of rotation.
[0027] Figure 9 A schematic exploded perspective view of a massage chair according to one embodiment is shown.
[0028] Figure 10 A partial perspective view of one embodiment of the backrest is shown when the angle has not been adjusted.
[0029] Figure 11 A partial perspective view of one embodiment of the backrest is shown when it is adjusted to the maximum angle.
[0030] Figure 12 A schematic diagram showing the relationship between the state of the backrest before the angle is adjusted and the state when the backrest is adjusted to the maximum angle is shown.
[0031] Figure 13 Draws Figure 12 A simple diagram of .
[0032] Figure 14 A partial perspective view of another embodiment is shown when the backrest has not yet been adjusted in angle.
[0033] Figure 15 A partial perspective diagram of another embodiment is shown when the backrest is adjusted to the maximum angle. DETAILED DESCRIPTION
[0034] In the claims, description and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" is to distinguish different objects rather than to describe a specific order.
[0035] In the claims, specification and the above-mentioned drawings of the present utility model, unless otherwise expressly defined, directional words, such as the terms "center", "transverse", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise" and the like, indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the present utility model.
[0036] In the claims, specification and the above drawings of the present utility model, unless otherwise clearly defined, the terms "fixed connection" and "fixed connection" should be understood in a broad sense, that is, any connection method without any displacement relationship and relative rotation relationship between the two parties, that is, including non-detachable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or elements.
[0037] In the claims, description and drawings of the present utility model, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".
[0038] Please refer to Figures 5 to 13 , one of the preferred embodiments of a massage chair with a variable backrest angle, the massage chair with a variable backrest angle includes a seat and a backrest, the seat includes a seat frame 10 and a seat cushion 20 installed on the seat frame 10, the backrest includes a backrest frame 30 and a backrest cushion 40 installed on the backrest frame 30, the backrest can rotate relative to the seat, and the distance between the rotation center of the backrest and the vertex of the bottom end of the backrest cushion 40 is greater than or equal to a first preset distance and less than or equal to a second preset distance.
[0039] like Figure 6 and Figure 8 As shown, the distance between the rotation center of the backrest portion and the vertex of the bottom end of the backrest cushion 40 is defined as d, that is, the first predetermined distance ≤ d ≤ the second predetermined distance. In this embodiment, the first predetermined distance is 10 mm and the second predetermined distance is 100 mm, that is, 10 mm ≤ d ≤ 100 mm.
[0040] like Figure 12 and Figure 13As shown, the circle drawn with the rotation center as the center and d as the radius is the inner small circle; the circle drawn with the rotation center as the center and the distance D between the rotation center of the backrest and the left end vertex of the seat cushion 20 as the radius is the outer large circle, the maximum rotation angle of the backrest is a, the line segment between the bottom vertex of the backrest cushion 40 when it is not rotated and the bottom vertex when it is rotated to the maximum angle is F, the distance e between the bottom vertex of the backrest cushion 40 and the left end vertex of the seat cushion 20 when the backrest angle has not been adjusted, the distance E between the bottom vertex of the backrest cushion 40 and the left end vertex of the seat cushion 20 when the backrest angle is adjusted backward to the maximum value, and the angle between the line segment F and the distance e is β;
[0041] According to the trigonometric function relationship:
[0042]
[0043]
[0044] Since in conventional designs, the maximum rotation angle a of the backrest is approximately 18 degrees, and the distance e between the bottom vertex of the backrest cushion 40 and the left vertex of the seat cushion 20 when the backrest angle has not been adjusted is approximately 30 mm, substituting the maximum value of d 100 into formulas (1) and (2), it can be obtained that E = 46.6, then: Ee = 16.6.
[0045] Therefore, the distance d between the rotation center of the backrest and the bottom vertex of the backrest cushion 40 is greater than or equal to the first predetermined distance and less than or equal to the second predetermined distance. This ensures that when the backrest is adjusted rearward to its maximum angle, the difference between the distance E between the bottom vertex of the backrest cushion 40 and the left vertex of the seat cushion 20 and the distance e between the bottom vertex of the backrest cushion 40 and the left vertex of the seat cushion 20 when the backrest has not been adjusted is less than 20 mm, that is, Ee ≤ 20 mm. This minimizes the displacement of the shoulders and back as the backrest rotates, facilitating massage program design and eliminating the need for re-identification.
[0046] In this embodiment, the distance d between the rotation center of the backrest and the vertex of the bottom end of the backrest cushion 40 is greater than or equal to the first predetermined distance and less than or equal to the third predetermined distance. In this embodiment, the third predetermined distance is 80 mm.
[0047] Preferably, the distance d between the rotation center of the backrest and the vertex of the bottom end of the backrest cushion 40 is a fourth predetermined distance, which is 55 mm. That is, when d = 55 mm, Ee = 6.8 mm, which minimizes the displacement of the human shoulder and back.
[0048] In this embodiment, Figure 9 、 Figure 10 and Figure 11As shown, the seat frame 10 is provided with an upwardly extending rotating rod 11, and the top of the rotating rod 11 is provided with a first axial hole 12, and the first axial hole 12 is located in the backrest; the backrest also includes a rotating frame 50, and the rotating frame 50 is provided with a second axial hole 51, and is further provided with a rotating shaft (not shown in the figure), which is riveted to the first axial hole 12 and the second axial hole 51 so that the rotating frame 50 can rotate relative to the rotating rod 11; a rotating drive member is also provided, which is mounted on the seat frame 10 and is transmission-connected to the rotating frame 50.
[0049] In this embodiment, the rotating rod 11 is arranged perpendicular to the top surface of the seat frame 10 .
[0050] In this embodiment, two spaced-apart lugs 52 are provided at the bottom end of the rotating frame 50, and the rotating driving member is a driving cylinder 60, the cylinder body of the driving cylinder 60 is connected to the seat frame 10 and the piston rod thereof is located between the two lugs 52 and is hingedly connected to the two lugs 52.
[0051] In this embodiment, the rotating frame 50 is further provided with a transmission rod 53, the end of which is hingedly connected to the backrest frame 40. Figure 10 As shown, when the piston rod of the driving cylinder 60 is in the extended position, the backrest is in the position where the angle is not adjusted; Figure 11 As shown, when the piston rod of the driving cylinder 60 is in the retracted position, the backrest rotates to the maximum angle.
[0052] Please refer to Figure 14 and Figure 15 , which is another embodiment of the present application.
[0053] The difference between this embodiment and the previous embodiment lies in the position of the first axial hole 12 of the rotating rod 11, that is, the rotation center of the backrest, which is different. Specifically:
[0054] In this embodiment, the seat frame 10 is provided with an upwardly extending rotating rod 11, and the top of the rotating rod 11 is provided with a first axial hole 12, and the first axial hole 12 is located in the seat cushion 20; the backrest portion also includes a rotating frame 50 and a rotating matching rod 54, and the rotating matching rod 54 is fixedly connected to the backrest frame 30 and is provided with a second axial hole 51, and is also provided with a rotating shaft, which is riveted to the first axial hole 12 and the second axial hole 51 so that the rotating matching rod 54 can rotate relative to the rotating rod 11; a rotating driving member is also provided, which is hingedly connected to the seat frame 10 and is transmission-connected to the backrest frame 30 through the rotating frame 50.
[0055] In this embodiment, two spaced-apart lugs 52 are provided at the bottom end of the rotating frame 50, and the rotating driving member is a driving cylinder 60. The cylinder body of the driving cylinder 60 is provided with a connecting piece 61, and the connecting piece 61 is located between the two lugs 52 and is hingedly connected to the two lugs 52. The piston rod of the driving cylinder 60 is hingedly connected to the seat frame 10.
[0056] The above description is merely a preferred embodiment of the present invention and therefore cannot be used to limit the scope of implementation of the present invention. In other words, equivalent changes and modifications made according to the patent scope of the present invention and the contents of the specification should still fall within the scope of the present invention.
Claims
1. A massage chair with a backrest with a variable angle, comprising a seat and a backrest, wherein the seat comprises a seat frame and a seat cushion mounted on the seat frame, and the backrest comprises a backrest frame and a backrest cushion mounted on the backrest frame, wherein the backrest can rotate relative to the seat, and wherein: The distance between the rotation center of the backrest and the top point of the bottom end of the backrest cushion is greater than or equal to the first preset distance and less than or equal to the second preset distance, so as to reduce the displacement of the human shoulder and back caused by the rotation of the backrest and avoid the massage program from re-identifying the human shoulder and back.
2. The massage chair with a variable backrest angle according to claim 1, characterized in that: The distance between the rotation center of the backrest portion and the top point of the bottom end of the backrest cushion is greater than or equal to a first preset distance and less than or equal to a third preset distance, and the third preset distance is less than the second preset distance.
3. The massage chair with a variable backrest angle according to claim 2, characterized in that: The distance between the rotation center of the backrest portion and the top point of the bottom end of the backrest cushion is a fourth preset distance, and the fourth preset distance is greater than the first preset distance and less than the third preset distance.
4. The massage chair with a variable backrest angle according to claim 3, characterized in that: The first preset distance range is 10 mm, the second preset distance range is 100 mm, the third preset distance range is 80 mm, and the fourth preset distance range is 55 mm.
5. A massage chair with a variable backrest angle according to claim 1, 2, 3 or 4, characterized in that: The seat frame is provided with a rotating rod extending upward, and a first axial hole is provided at the top of the rotating rod, and the first axial hole is located in the backrest portion; the backrest portion also includes a rotating frame, and the rotating frame is provided with a second axial hole and a rotating shaft, and the rotating shaft is riveted to the first axial hole and the second axial hole so that the rotating frame can rotate relative to the rotating rod; a rotating driving component is also provided, and the rotating driving component is mounted on the seat frame and is transmission-connected to the rotating frame.
6. The massage chair with a variable backrest angle according to claim 5, characterized in that: The rotating rod is arranged perpendicularly to the top end surface of the seat frame.
7. The massage chair with a variable backrest angle according to claim 5, characterized in that: The bottom end of the rotating frame is provided with two lugs arranged at intervals. The rotating driving member is a driving cylinder, the cylinder body of the driving cylinder is connected to the seat frame, and the piston rod of the driving cylinder is located between the two lugs and is hingedly connected to the two lugs.
8. The massage chair with a variable backrest angle according to claim 5, characterized in that: The rotating frame is also fixed with a transmission rod, and the end of the transmission rod is hingedly connected to the backrest frame.
9. A massage chair with a variable backrest angle according to claim 1, 2, 3 or 4, characterized in that: The seat frame is provided with a rotating rod extending upward, and a first axial hole is provided at the top of the rotating rod, and the first axial hole is located in the seat cushion; the backrest portion also includes a rotating frame and a rotating matching rod, and the rotating matching rod is fixedly connected to the backrest frame and is provided with a second axial hole, and is also provided with a rotating shaft, which is riveted to the first axial hole and the second axial hole so that the rotating matching rod can rotate relative to the rotating rod; a rotating driving member is also provided, which is hingedly connected to the seat frame and is transmission-connected to the backrest frame through the rotating frame.
10. The massage chair with a variable backrest angle according to claim 9, characterized in that: The bottom end of the rotating frame is provided with two lugs arranged at intervals. The rotating driving member is a driving cylinder. The cylinder body of the driving cylinder is provided with a connecting plate, which is located between the two lugs and is hingedly connected to the two lugs. The piston rod of the driving cylinder is hingedly connected to the seat frame.