Chair frame and massage device

Abstract

A chair frame, which can be used in a massage device such as a massage chair, and can enrich the massage modes of the massage device. The chair frame of the present invention comprises: a base; a seating part, which is rotatably supported on the base; a seating part driving apparatus, which is separately connected to the base and the seating part, and drives the seating part to rotate relative to the base; a backrest part, which is rotatably connected to the seating part; and a backrest part driving apparatus, which is separately connected to the seating part and the backrest part, and drives the backrest part to rotate relative to the seating part, wherein the seat parting is supported on the base by means of an arc-shaped guide rail.

Description

Chair frame and massage device TECHNICAL FIELD

[0001] The present application relates to the field of massage, in particular to a chair frame and a massage device with the chair frame. BACKGROUND

[0002] A massage chair is disclosed in patent document CN202110336302.6, which comprises a base, a seat support rotatably supported on the base, a lower leg support rotatably connected with the seat support, and a drive device driving the seat support to rotate relative to the base and driving the lower leg support to rotate relative to the seat support.

[0003] However, in the above massage chair, the backrest part and the seating part are formed as one whole, constituting the seat support, and are formed as a chair frame in the shape of approximately L, so that the massage mode is relatively less, and the needs of users for various massage modes cannot be met. SUMMARY

[0004] The present application is completed in view of the above problems, and aims to provide a chair frame capable of enriching the massage mode of a chair frame with massage function. In addition, the present application also aims to provide a massage device with the above chair frame.

[0005] To achieve the above-mentioned purpose, the present application provides a chair frame, comprising a base, a seating part rotatably supported on the base, a seating part drive device connected to the base and the seating part respectively and driving the seating part to rotate relative to the base, a backrest part rotatably connected with the seating part, and a backrest part drive device connected to the seating part and the backrest part respectively and driving the backrest part to rotate relative to the seating part, wherein the seating part is supported on the base via an arc-shaped guide rail.

[0006] The chair frame according to the present application comprises: a base; a seat portion supported to the base via an arc-shaped guide rail and rotatable relative to the base; a seat portion driving device driving the seat portion to rotate relative to the base so as to change a seat portion included angle between the seat portion and the base (an included angle formed by an upper surface of the seat portion and a bottom surface of the base); a back portion connected to the seat portion rotatably relative to the seat portion; and a back portion driving device driving the back portion to rotate relative to the seat portion so as to change a back portion included angle between the back portion and the seat portion. Thus, in a state where a user sits on the seat portion and leans his / her back against the back portion, by rotating the back portion relative to the seat portion under the drive of the back portion driving device, stretching and pressing between the waist and abdomen (and the thighs) and the lower leg to the feet can be further realized, so as to realize stretching and pressing of a multi-joint area from the torso to the feet. Furthermore, when the seat portion is rotated relative to the base under the drive of the seat portion driving device, the functional assembly including the seat portion and the back portion can be driven to reciprocate forward and backward under the support of the base, so as to change the center of gravity of the body in a state where the body of the user is kept in any stretching and pressing posture, and a variety of massage modes can be realized.

[0007] In addition, the seat portion and the back portion can also have massage mechanisms such as rollers or air bags for massaging corresponding parts of the user.

[0008] In addition, in the chair frame according to the present application, when the seat portion or the base slides relative to the guide rail, the seat portion is relatively displaced relative to the base while the seat portion included angle is changed.

[0009] In addition, in the chair frame according to the present application, at least one of a first state and a second state can be presented during movement of the seat portion or the base along the guide rail, in the first state, a front end of the upper surface of the seat portion is higher than a rear end, in the second state, the front end of the upper surface of the seat portion is lower than the rear end, and an intermediate state can also be presented during movement of the seat portion or the base along the guide rail, in the intermediate state, the front end of the upper surface of the seat portion is substantially flush with the rear end.

[0010] Here, the "upper surface of the seat portion" refers to a surface contacting the buttocks and thighs of the user when the user sits on the seat portion or a surface corresponding to the surface, and the first state and the second state are both based on the bottom surface of the base being kept horizontal.

[0011] The chair frame according to the present application can exhibit at least one of a first state in which the front end of the upper surface of the seat portion is higher than the rear end thereof and a second state in which the front end of the upper surface of the seat portion is lower than the rear end thereof during movement of the seat portion or the base along the guide rail, and can also exhibit an intermediate state in which the front end of the upper surface of the seat portion is substantially flush with the rear end thereof during movement of the seat portion or the base along the guide rail. Thus, by switching between the states, the user can experience massage in different postures or body positions, and by switching to the second state, the user can easily stand up from the seat portion.

[0012] Further, in the chair frame according to the present application, the guide rail is formed in an arc shape in which the central portion is lower than the both end portions, and the upper surface of the seat portion is higher than the both end portions of the guide rail throughout the movement range of the seat portion.

[0013] The chair frame according to the present application is provided with a guide rail formed in an arc shape in which the central portion is lower than the both end portions, and the upper surface of the seat portion is higher than the both end portions of the guide rail throughout the movement range of the seat portion. Thus, even if the guide rail is set lower in order to improve stability during rotation of the seat portion, the space between the upper surface of the seat portion and the guide rail in the vertical direction can be utilized to easily provide a back portion driving device or the like.

[0014] Further, in the chair frame according to the present application, a leg portion is rotatably connected to the seat portion, and a leg portion driving device is connected to the seat portion and the leg portion, respectively, and drives the leg portion to rotate relative to the seat portion.

[0015] Further, the leg portion can be provided with a massage mechanism such as a roller or an air bag that massages the user's legs and feet.

[0016] Further, in the chair frame according to the present application, the seat portion driving device is located between the bottom surface of the base and the bottom surface of the seat portion in the vertical direction, and the leg portion driving device and the back portion driving device are located between the upper surface of the seat portion and the bottom surface of the seat portion in the vertical direction.

[0017] The chair frame according to the present application is provided with a seat portion driving device located between the bottom surface of the base and the bottom surface of the seat portion in the vertical direction, and a leg portion driving device and a back portion driving device located between the upper surface of the seat portion and the bottom surface of the seat portion in the vertical direction. Thus, the seat portion driving device can be prevented from interfering with the leg portion driving device and the back portion driving device.

[0018] Further, in the chair frame according to the present application, the leg portion driving device includes a leg portion driving push rod having a first portion and a second portion relatively movable, the first portion being rotatably connected to the seating portion, and a leg portion driving link having a rear end rotatably connected to the second portion and a front end having a roller supporting the leg portion.

[0019] According to the chair frame according to the present application, the leg portion driving device includes a leg portion driving push rod having a first portion and a second portion relatively movable, the first portion being rotatably connected to the seating portion, and a leg portion driving link having a rear end rotatably connected to the second portion and a front end having a roller supporting the leg portion, so that the leg portion driving device is simple in structure and the rotation angle of the leg portion with respect to the seating portion can be reliably controlled and is less likely to be affected by external vibrations and the like.

[0020] Further, in the chair frame according to the present application, the seating portion driving device includes a seating portion driving push rod rotatably connected to one of the base and the seating portion, and a seating portion driving slide block movable along the seating portion driving push rod and rotatably connected to the other of the base and the seating portion.

[0021] According to the chair frame according to the present application, the seating portion driving device includes a seating portion driving push rod rotatably connected to one of the base and the seating portion, and a seating portion driving slide block movable along the seating portion driving push rod and rotatably connected to the other of the base and the seating portion, so that the seating portion driving device is simple in structure.

[0022] Further, in the chair frame according to the present application, the back portion driving device includes a back portion driving push rod having a first portion and a second portion relatively movable, the first portion being rotatably connected to one of the seating portion and the back portion, and the second portion being rotatably connected to the other of the seating portion and the back portion.

[0023] According to the chair frame according to the present application, the back portion driving device includes a back portion driving push rod having a first portion and a second portion relatively movable, the first portion being rotatably connected to one of the seating portion and the back portion, and the second portion being rotatably connected to the other of the seating portion and the back portion, so that the back portion driving device is simple in structure and the rotation angle of the back portion with respect to the seating portion can be reliably controlled and is less likely to be affected by external vibrations and the like.

[0024] Further, in the chair frame of the present application, at least one of a zero-gravity state in which a seating portion angle (an angle formed by an upper surface of the seating portion and a bottom surface of the base) is a prescribed angle, a leg portion angle (an angle formed by an upper surface of the leg portion and an upper surface of the seating portion) is an arbitrary angle within a prescribed range, and a backrest portion angle (an angle formed by an upper surface of the backrest portion and an upper surface of the seating portion) is an arbitrary angle within a prescribed range, an assist standing state in which the seating portion angle is an angle in which a front end portion of the upper surface of the seating portion is lower than a rear end portion or is substantially flush with the rear end portion, a lying state in which the seating portion angle is a prescribed angle, and the leg portion angle and the backrest portion are each close to 180°, a squeeze state in which the seating portion angle is a prescribed angle, the leg portion is controlled to rotate with respect to a front end of the seating portion and gradually approach the backrest portion from above the front end of the seating portion, and the backrest portion is controlled to rotate with respect to a rear end of the seating portion and gradually approach the leg portion from above the rear end of the seating portion, and a stretch state in which the leg portion and the backrest portion are distanced from each other.

[0025] Further, in the chair frame of the present application, at least one of a first squeeze-stretch mode in which a seating portion angle is a prescribed angle, the leg portion and the backrest portion are controlled to rotate with respect to the seating portion to change a leg portion angle and a backrest portion angle, respectively, and synchronous mutual approach and synchronous mutual distancing are repeated, a second squeeze-stretch mode in which a leg portion angle is a prescribed angle, the seating portion is rotated with respect to the base to change the seating portion angle, and a backrest portion angle is also changed, and a swing mode in which the seating portion is rotated with respect to the base to change the seating portion angle, and a functional group including the leg portion, the seating portion, and the backrest portion is caused to reciprocate with respect to the base.

[0026] Further, in order to achieve the above object, the present application provides a massage device including the chair frame of any one of the above.

[0027] The chair frame according to the present application includes: a base; a seat portion supported to the base via an arc-shaped guide rail and rotatable relative to the base; a seat portion drive device that drives the seat portion to rotate relative to the base, thereby changing a seat portion included angle between the seat portion and the base; a backrest portion connectable to the seat portion in a rotatable manner relative to the seat portion; and a backrest portion drive device that drives the backrest portion to rotate relative to the seat portion, thereby changing a backrest portion included angle between the backrest portion and the seat portion. Thus, in a state where a user sits on the seat portion and leans his / her back against the backrest portion, by the rotation of the backrest portion relative to the seat portion under the drive of the backrest portion drive device, stretching and pressing between the waist and abdomen (and the thigh) and the lower leg to the foot can be further achieved, thereby achieving stretching and pressing of a multi-joint region from the torso to the foot. Further, when the seat portion is rotated relative to the base under the drive of the seat portion drive device, the functional assembly including the leg portion, the seat portion, and the backrest portion can be moved back and forth as a whole under the support of the base, thereby being able to change the center of gravity of the body in a state where the body of the user is maintained in any stretching and pressing posture, and being able to achieve a variety of massage modes. BRIEF DESCRIPTION OF DRAWINGS

[0028] FIG. 1 is a perspective view schematically showing a chair frame according to an embodiment of the present application.

[0029] FIG. 2 is a side view schematically showing the chair frame according to the embodiment of the present application, and shows an initial state.

[0030] FIG. 3 is a side view schematically showing the chair frame according to the embodiment of the present application, and shows a zero-gravity state.

[0031] FIG. 4 is a side view schematically showing the chair frame according to the embodiment of the present application, and shows a lying state.

[0032] FIG. 5 is a side view schematically showing the chair frame according to the embodiment of the present application, and shows a standing-assisted state.

[0033] FIG. 6 is a side view schematically showing the chair frame according to the embodiment of the present application, and shows a pressing state.

[0034] FIG. 7 is a side view schematically showing the chair frame according to the embodiment of the present application, and shows a stretching state.

[0035] (Explanation of symbols) 1 frame 10 base 11 bottom 111 first crossbar 112 second crossbar 12 guide rail 13 connecting portion 131 first vertical bar 132 second vertical bar 133 third vertical bar 20 seat portion 21 seat bottom 211 bottom first link 212 protruding portion 22 seat top 221 top link 23 seat connecting portion 231 third link 232 fourth link 30 leg portion 40 back portion 50 seat portion drive device 51 seat portion drive push rod 52 seat portion drive slider 60 leg portion drive device 61 leg portion drive push rod 62 leg portion drive link 70 back portion drive device 71 back portion drive push rod 80 pedal portion DETAILED DESCRIPTION

[0036] Hereinafter, the frame according to an embodiment of the present application will be described with reference to FIGS. 1 to 7, taking a massage chair as an example. However, the frame is not limited to a massage device such as a massage chair, but can also be used in other functional chairs or the like that support a user's body without a massage function.

[0037] Here, for convenience of description, the directions of "up", "down", "left", "right", "front", and "rear" shown in FIG. 1 will be used as a reference.

[0038] EMBODIMENT

[0039] (Overall structure of the frame)

[0040] As shown in FIGS. 1 and 2, the chair frame 1 includes a base 10, a seat portion 20 rotatably supported to the base 10, a seat portion drive device 50 connected to the base 10 and the seat portion 20, respectively, and driving the seat portion 20 to rotate with respect to the base 10, a back portion 40 rotatably connected to the seat portion 20, and a back portion drive device 70 connected to the seat portion 20 and the back portion 40, respectively, and driving the back portion 40 to rotate with respect to the seat portion 20. Also, the seat portion 20 is supported to the base 10 via an arc-shaped guide rail 12.

[0041] Here, as shown in FIGS. 1 and 2, the chair frame 1 further includes a leg portion 30 rotatably connected to the seat portion 20, and a leg portion drive device 60 connected to the seat portion 20 and the leg portion 30, respectively, and driving the leg portion 30 to rotate with respect to the seat portion 20. Also, the chair frame 1 further includes a footboard portion 80 rotatably connected to the leg portion 30. Also, the footboard portion 80, the leg portion 30, the seat portion 20, and the back portion 40 are rotatably hinged in substantially series, and the rotation axis of the footboard portion 80 with respect to the leg portion 30, the rotation axis of the seat portion 20 with respect to the base 10, the rotation axis of the leg portion 30 with respect to the seat portion 20, and the rotation axis of the back portion 40 with respect to the seat portion 20 are parallel to each other (parallel to the left-right direction in the illustrated example).

[0042] Further, although not shown, a control portion that controls the operation of the seat portion drive device 50, the leg portion drive device 60, and the back portion drive device 70 can be provided on the chair frame 1. Also, a storage portion that stores control instructions can be provided on the chair frame 1.

[0043] (Base)

[0044] As shown in FIG. 1, the base 10 is a support frame that supports the entire functional assembly including the leg portion 30, the seat portion 20, and the back portion 40.

[0045] Here, although not shown, a base cover portion (for example, made of plastic or the like) that covers the base 10 is generally provided in practice.

[0046] Further, as shown in FIG. 1, the base 10 includes the guide rail 12 that guides the movement trajectory of the seat portion 20.

[0047] Specifically, the base 10 includes a base portion 11, the guide rail 12, and a connection portion 13. The bottom surface of the base portion 11 is in contact with a support surface such as a floor, and the surface on which the base portion 11 is located can also be considered as the bottom surface. The guide rail 12 is located above the base portion 11 and is connected to the base portion 11 via the connection portion 13.

[0048] More specifically, the base 11 includes a pair of first horizontal bars 111 extending in the front-rear direction and spaced apart in the left-right direction, and a pair of second horizontal bars 112 extending in the left-right direction, spaced apart in the front-rear direction, and connecting the pair of first horizontal bars 111 to each other.

[0049] The guide rails 12 extend substantially in the front-rear direction in a concave arc shape. More specifically, the guide rails 12 are formed in an arc shape with the central portion lower than the both ends. A pair of guide rails 12 are symmetrically provided at a spaced-apart interval in the left-right direction. In the illustrated example, the front end of the guide rail 12 is lower than the rear end, but this is not limiting, and the front end and the rear end can be located at the same position in the height direction, or the front end can be higher than the rear end. In the present embodiment, the pair of guide rails 12 are each a circular arc of a circle having the same radius. The line connecting the centers of the pair of guide rails 12 constitutes a virtual rotation axis when the seating portion 20 rotates with respect to the base 10.

[0050] The connecting portions 13 are connected between the guide rails 12 and the corresponding side first horizontal bars 111. The connecting portions 13 include a pair of first vertical bars 131 extending in the up-down direction, spaced apart in the left-right direction, and connecting the vicinity of the front end of the guide rail 12 and the vicinity of the front end of the first horizontal bar 111, a pair of second vertical bars 132 extending in the up-down direction, spaced apart in the left-right direction, and connecting the lengthwise central portions of the guide rail 12 and the first horizontal bar 111, and a pair of third vertical bars 133 extending in the up-down direction, spaced apart in the left-right direction, and connecting the vicinity of the rear end of the guide rail 12 and the vicinity of the rear end of the first horizontal bar 111.

[0051] Further, as shown in FIGS. 1 and 2, the pair of second vertical bars 132 supporting the guide rails 12 closer to the lengthwise central portions of the guide rails 12 are shorter than the first vertical bars 131 and the third vertical bars 133 supporting the guide rails 12 closer to the lengthwise end portions of the guide rails 12. The bottom surface of the base 10 is lower than the lowest point of the guide rails 12.

[0052] (Seating portion and its driving structure)

[0053] As shown in FIG. 1, the seating portion 20 is a support frame for supporting the buttocks and the thighs of a user.

[0054] Here, although not shown, a seating portion cover portion (the portion that comes into contact with the buttocks and the thighs of a user at the time of use is composed of, for example, a leather material, cloth, or the like, is generally provided in practice.

[0055] Further, as shown in FIGS. 1, 3, and 5, the seating portion 20 is placed on the guide rail 12, is connected to the base 10 via the guide rail 12, and rotates with respect to the base 10 while sliding with respect to the base 10. Also, the seating portion 20 is movable along the guide rail 12 to switch between the first state, the intermediate state, and the second state. In the first state, the front end of the upper surface of the seating portion 20 (in the example shown, the upper surface of the top link 221 is flush, and in the case where the seating portion cover is provided, the portion of the seating portion cover that contacts the user's hips and thighs when in use) is higher than the rear end (see FIG. 3). In the intermediate state, the front end of the upper surface of the seating portion 20 is substantially flush with the rear end (see FIG. 4). In the second state, the front end of the upper surface of the seating portion 20 is lower than the rear end (see FIG. 5). In the example shown, the upper surface of the seating portion 20 is higher than both ends of the guide rail 12 throughout the range of motion of the seating portion 20.

[0056] Specifically, the seating portion 20 includes a seating bottom portion 21, a seating top portion 22, and a seating connecting portion 23. The seating bottom portion 21 has a mating portion that mates with the guide rail 12. The mating portion is movably engaged with the guide rail 12 so that the seating portion 20 does not fall off the guide rail 12 while sliding along the guide rail 12. The seating top portion 22 is located above the seating bottom portion 21. The seating connecting portion 23 integrally connects the seating bottom portion 21 and the seating top portion 22. More specifically, the seating bottom portion 21 includes a pair of bottom first links 211, a pair of bottom second links, and a protruding portion 212. The pair of bottom first links 211 extend in a plane perpendicular to the left-right direction, are provided at intervals in the extending direction with a pair of rollers (but not limited thereto, and more rollers can be provided, or sliders can be provided instead of the rollers) as the mating portion, and are spaced apart in the left-right direction. The pair of bottom second links extend in the left-right direction, are spaced apart in the front-rear direction, and connect the pair of bottom first links 211. The protruding portion 212 protrudes downward from the bottom first links 211, has a substantially U shape that opens upward when viewed in the front-rear direction, and is fixedly connected to both ends of the U shape near the rear ends of the pair of bottom first links 211. The protruding portion 212 of the seating portion 20 is located farther from the central portion in the front-rear direction of the seating portion 20 than the rear end of the seating portion 20. The protruding portion 212 is located lower in the up-down direction than the seating bottom portion 21 in which the mating portion is provided. The seating top portion 22 includes a pair of top links 221 that extend in a plane perpendicular to the left-right direction and are spaced apart in the left-right direction. The seating connecting portion 23 includes a pair of third links 231 that are spaced apart in the left-right direction and connect the front ends of the bottom first links 211 and the front ends of the top links 221, and a pair of fourth links 232 that are spaced apart in the left-right direction and connect the rear ends of the bottom first links 211 and the rear ends of the top links 221 (in the illustrated example, the fourth links 232 are longer than the third links 231, and the upper ends of the fourth links 232 are higher than the upper ends of the third links 231 when the bottom first links 211 are located at positions in which the lengths thereof are aligned with the front-rear direction). Thus, when the mating portion is slid along the guide rail 12 to a position in which the bottom first links 211 are parallel to the bottom portion 11 of the base 10, the front end portion of the seating portion 20 is higher than the rear end portion. That is, if a state in which the front and rear mating portions are slid along the guide rail 12 to a position in which the bottom first links 211 are parallel to the bottom surface of the bottom portion 11 of the base 10 is defined as a certain specific state, the front end portion of the seating portion 20 is higher than the rear end portion in the specific state. For example, the chair frame 1 can be adjusted from the specific state to other massage modes.

[0057] As shown in FIG. 5, the upper ends of the pair of fourth links 232 arranged symmetrically left and right are higher than the upper ends of the pair of third links 231 arranged symmetrically left and right, and form a seat-inherent included angle A between the upper surface of the seat portion 20 and the bottom surface of the seat portion 20. When the pair of rollers (fitting portions) on the left and the pair of rollers (fitting portions) on the right are placed on the guide rail 12 respectively, and the rollers slide along the guide rail 12 by the drive of the seat portion drive device 50, a line connecting the pair of rollers on either side forms a fitting portion included angle B with the bottom surface (ground) of the base 10. When the seat portion 20 is moved to the last end of the guide rail 12, the front end of the upper surface of the seat portion can be made lower than the rear end thereof. The fitting portion included angle B gradually changes during the sliding of the rollers along the guide rail 12. Within the variable angle range of the fitting portion included angle B, there is an angle larger than the seat-inherent included angle A. As shown in FIG. 5, when the seat portion 20 is rotated to the fitting portion included angle B larger than the seat-inherent included angle A, the front end of the seat portion 20 can be made lower than the rear end thereof, and the massage mode of assisting the sitting is easily realized.

[0058] Further, as shown in FIGS. 1 and 2, the seat portion drive device 50 is located between the bottom surface of the base 10 and the seat portion 21 in the vertical direction.

[0059] Further, as shown in FIGS. 1 and 3, the seat portion drive device 50 includes a seat portion drive push rod 51 and a seat portion drive slider 52. The seat portion drive push rod 51 is rotatably connected to one of the base 10 and the seat portion 20. In the illustrated example, the front end of the seat portion drive push rod 51 is hingedly fixed to the base 10, and is rotatable with respect to the hinge with the base 10 in the vertical direction. The seat portion drive slider 52 is movable along the seat portion drive push rod 51, and is rotatably connected to the other of the base 10 and the seat portion 20. In the illustrated example, the seat portion drive slider 52 is hingedly fixed to the seat portion 20, specifically to the protruding portion 212.

[0060] In the illustrated example, when the seat portion drive device 50 drives the seat portion drive slider 52 so that the seat portion drive slider 52 travels along the seat portion drive push rod 51, the protruding portion 212 of the seat portion 20 to which the seat portion drive slider 52 is hingedly connected also travels along the seat portion drive push rod 51 along with the movement of the seat portion drive slider 52. During the travel of the protruding portion 212 along the seat portion drive push rod 51, the protruding portion 21 moves the seat portion 20 along with it. Thus, the fitting portions of the seat portion 20 slide along the guide rail 12, and the seat portion included angle a formed by the upper surface of the seat portion 20 and the bottom surface of the base 10 continuously changes during the sliding of the seat portion 20 along the circular-arc-shaped guide rail 12.

[0061] Further, the distance between the seating bottom 21 of the seating portion 20 and the seating portion drive slider 52 is constant, that is, the distance by which the protrusion 212 protrudes downward from the seating bottom 21. The protrusion 212 is configured to rotate the seating portion drive rod 51 in the vertical direction as the seating portion drive slider 52 moves along the seating portion drive rod 51. The protrusion 212 protruding downward from the seating bottom 21 increases the movement distance of the seating portion 20 within the limited stroke distance of the seating portion drive slider 52 moving along the seating portion drive rod 51. Thus, a shorter seating portion drive rod 51 can be used to achieve the required movement distance of the seating portion 20. Further, the protrusion 212 protruding downward prevents the seating bottom 21 from interfering with the seating portion drive device fixed to the front end of the base 10 when the seating bottom 21 rotates.

[0062] Further, the seating portion drive device 50 includes, for example, a motor or a cylinder that drives the seating portion drive slider 52 to slide along the seating portion drive rod 51.

[0063] (Leg portion and its drive structure)

[0064] As shown in FIG. 1, the leg portion 30 is a support frame for supporting the lower limbs of a user.

[0065] Here, although not shown, a leg portion cover (the portion that contacts the user's lower leg when in use is made of, for example, leather, cloth, or the like) that covers the leg portion 30 is generally provided in practice.

[0066] Further, the leg portion 30 has, for example, a rectangular frame shape.

[0067] Further, as shown in FIG. 1, the leg portion drive device 60 is positioned between the upper surface (top link 221) of the seating portion 20 and the seating bottom 21 in the vertical direction.

[0068] Further, as shown in FIGS. 1 and 3, the leg portion drive device 60 includes a leg portion drive rod 61 and a leg portion drive link 62. The leg portion drive rod 61 has a first portion and a second portion that is capable of extending and retracting with respect to the first portion. The first portion is rotatably connected to the seating portion 20. In the example shown, the rear end (located in the first portion) of the leg portion drive rod 61 is hingedly fixed to the seating portion 20, specifically, the rearward side of the second link of the bottom portion, and is rotatable about the circumference of the rearward second link. The front end (located in the second portion) of the leg portion drive rod 61 is capable of extending and retracting with respect to the rear end, and is hingedly connected to the rear end of the leg portion drive link 62 in a rotatable manner. The front end of the leg portion drive link 62 is connected to the front end of the seating portion 20, and is rotatable in the front-rear direction with respect to the connection to the seating portion 20. Further, a roller is provided in the front end of the leg portion drive link 62 at a position different from the position connected to the seating portion 20. The roller of the leg portion drive link 62 is in sliding contact with the leg portion 30 in a manner that supports the leg portion 30.

[0069] Further, the leg driving device 60 also includes, for example, a motor or a cylinder that drives the first and second portions of the leg driving push rod 61 to perform the telescopic movement. When the leg driving device 60 drives the second portion of the leg driving push rod 61 to telescope relative to the first portion thereof, the telescopic movement of the second portion will drive the leg driving link 62 to move synchronously through the hinging of the rear end of the leg driving link 62. Further, a portion of the front end of the leg driving link 62 is hingedly connected to the front side of the seating portion 20 in a rotatable manner, so that the roller provided at the front end of the leg driving link 62 at a position different from the hinging point can change its position in the front-rear direction and the up-down direction while allowing the leg driving link 62 to rotate relative to the front side of the seating portion 20. The change in the position of the roller in the front-rear direction and the up-down direction will cause the leg 30 supported by the roller to move accordingly. Thus, the leg 30 rotates relative to the seating portion 20 to change the leg angle γ formed by the upper surface of the leg 30 and the upper surface of the seating portion 20, with the rotation connection points on the left and right sides of the seating portion 20 as the rotation axes.

[0070] As shown in FIG. 1, the leg 30 has a pedal portion 80 at the front end thereof. The pedal portion 80 supports the foot massage mechanism.

[0071] Here, although not shown, a covering portion (a portion that contacts the user's foot when in use, for example, made of leather or the like) that covers the foot massage mechanism can also be provided at the pedal portion 80.

[0072] (backrest portion and its driving structure)

[0073] As shown in FIG. 1, the backrest portion 40 is a support frame for supporting the back of the user.

[0074] Here, although not shown, a backrest portion covering portion (a portion that contacts the user's back when in use, for example, made of leather, cloth or the like) that covers the backrest portion 40 is usually provided in practice.

[0075] Further, the backrest portion 40 is, for example, in the shape of a rectangular frame as a whole.

[0076] Further, as shown in FIG. 1, the backrest driving device 70 is located between the upper surface (top link 221) of the seating portion 20 and the seating bottom portion 21 in the up-down direction.

[0077] Further, as shown in Fig. 1, the backrest portion driving device 70 includes a backrest portion driving push rod 71. The backrest portion driving push rod 71 has a first portion and a second portion which is extendable and retractable with respect to the first portion. The first portion is rotatably connected to one of the seating portion 20 and the backrest portion 40. The second portion is rotatably connected to the other of the seating portion 20 and the backrest portion 40. In the example shown in the drawing, the front end of the backrest portion driving push rod 71 (at the first portion) is hinged to the seating portion 20, specifically to the front side of the bottom second link. The rear end of the backrest portion driving push rod 71 (at the second portion) is hinged to the backrest portion 40.

[0078] Further, the backrest portion driving device 70 includes, for example, a motor or a cylinder which drives the first portion and the second portion of the backrest portion driving push rod 71 to extend and retract.

[0079] As shown in Fig. 1, both the leg portion driving device 60 and the backrest portion driving device 70 have one end fixedly connected to the seating portion 20 and rotatable with respect to the connection to the seating portion 20, and the other end extendable and retractable. The leg portion 30 is driven to rotate with respect to the hinge to the seating portion 20 by the extension and retraction of the leg portion driving device 60, thereby changing the leg angle γ formed by the upper surface of the leg portion 30 and the upper surface of the seating portion 20. The backrest portion 40 is driven to rotate with respect to the hinge to the seating portion 20 by the extension and retraction of the backrest portion driving device 70, thereby changing the backrest angle β formed by the upper surface of the backrest portion 40 and the upper surface of the seating portion 20. In the example shown in Fig. 1, the first portion of the leg portion driving device 60 rotatably connected to the seating portion 20 is located at the rear end of the seating portion 20, and the second portion is extendable and retractable toward the front end of the seating portion 20. The first portion of the backrest portion driving device 70 rotatably connected to the seating portion 20 is located at the front end of the seating portion 20, and the second portion is extendable and retractable toward the rear end of the seating portion 20. The extendable and retractable ends of the leg portion driving device 60 and the backrest portion driving device 70 each extend toward the opposite direction.

[0080] As described above, in the present example, the connection point of the leg portion driving device 60 to the seating portion 20 is closer to the backrest portion 40 side than the connection point of the backrest portion driving device 70 to the seating portion 20. The connection point of the backrest portion driving device 70 to the seating portion 20 is closer to the leg portion 30 side than the connection point of the leg portion driving device 60 to the seating portion 20.

[0081] (Massage mode)

[0082] By controlling the seat portion driving device 50, the leg portion driving device 60, and the backrest portion driving device 70, for example, by changing the extension and retraction states of the driving push rods of the respective driving devices 50, 60, 70, the chair frame 1 can form the initial state, the zero-gravity state, the lying state, the standing-assisting state, the squeezing state, and the stretching state, and can switch between these states. Thus, the user can be provided with an experience of massage in different postures or body positions. In the illustrated embodiment, the extension and retraction states refer to the extension and retraction amounts and the extension and retraction speeds of the respective driving push rods.

[0083] Here, as shown in FIG. 2, the initial state of the chair frame 1 can be a state in which the chair frame 1 is in the power-on state, the end state, or the standby state, or a state in which the chair frame 1 is in the initial state at the start of any other massage mode. In the initial state, the leg portion angle γ formed by the upper surface of the seat portion 20 with respect to the upper surface of the leg portion 30 is an angle that is advantageous for the user to sit and stand, for example, an angle that is less than 270° but greater than 180°. Further, the backrest portion angle β formed by the upper surface of the seat portion 20 with respect to the upper surface of the backrest portion 40 is an angle that is comfortable for the user to sit or that can assist the user to stand, for example, an angle of 80° to 110°. Also, in the initial state, the upper surface of the seat portion 20 can be flush with the support surface (the ground), or the front end of the upper surface of the seat portion 20 can be slightly higher or slightly lower than the rear end of the upper surface. That is, the seat portion 20 can be brought to the first state, the intermediate state, or the second state by driving the seat portion driving device 50.

[0084] To adjust the seat portion angle α so that the chair frame 1 is in the initial state, the seat portion driving device 50 drives the seat portion driving slider 52 to the initial position. For example, a position of the seat portion driving slider 52 in which the seat portion 20 is in a state in which the seat portion bottom is parallel to the bottom surface of the base 10 can be set as a reference position, and then the seat portion driving slider 52 can be driven to move from the reference position to the initial position corresponding to the initial state. Alternatively, the reference position can be set as the initial position, or any prescribed position can be set as the initial position.

[0085] In the present embodiment, the seat portion driving device 50 adjusts the seat portion angle α by adjusting the position of the seat portion driving slider 52 on the seat portion driving push rod 51. However, the present application is not limited thereto, and the seat portion 20 can be moved by other driving mechanisms. For example, the seat portion 20 can be moved by a movable mechanism (a telescopic push rod) that can be extended and retracted, so that the seat portion angle α is adjusted by the extension and retraction distance of the telescopic push rod.

[0086] In addition, as shown in Fig. 3, the zero-gravity state refers to a state in which the user's torso and legs form an angle of about 128 ± 8 degrees. When the user is in the zero-gravity state, the heart and knees are approximately at the same horizontal position, or the user's feet are higher than the heart. In this way, blood circulation is promoted and the burden on the heart is reduced. At the same time, the user's body weight is evenly distributed, and the load on some or several parts of the body is not too large, thereby minimizing the pressure on the muscles and bones.

[0087] In order to place the chair frame 1 in the zero-gravity state, the leg portion 30 can be driven to rotate via the leg portion driving device 60 so that the leg portion included angle γ formed between the upper surface of the seating portion 20 and the upper surface of the leg portion 30 is any angle within a predetermined range. For example, the leg portion included angle γ can be between 180° and 270°, so that the user's thighs and calves form an internal included angle of 90° (calf flexion) to 180° (calf extension). The internal included angle is in the range of 120° to 135° (i.e., the leg portion included angle γ is in the range of 225° to 240°), which further improves the comfort of the user. The seating portion 20 can be driven to rotate via the seating portion driving device 50 so that the seating portion included angle α is a predetermined specified angle, and then the backrest portion 40 can be driven to rotate via the backrest portion driving device 70 so that the backrest portion included angle β is an angle within a predetermined range, for example, any angle within 128 ± 8 degrees. As shown in Fig. 3, after adjusting the backrest portion included angle β to a predetermined angle, the seating portion 20 can be driven to slide along the guide rail 12 by driving the seating portion driving slider 52 to increase or decrease the seating portion included angle α, thereby adjusting the height of the front end of the seating portion 20 so that the front end of the seating portion 20 is higher than, equal to, or lower than a specific position of the backrest portion 40. In the zero-gravity state, the specific position of the backrest portion 40 refers to a position of the backrest portion 40 corresponding to the user's heart. The position of the user's heart can be detected by a conventional body type detection method.

[0088] During the time when the chair frame 1 remains in the zero-gravity state and the user is in the zero-gravity posture, the user can also perform the rocking motion described below by repeatedly rotating the seating portion 20 about the guide rail 12. That is, while maintaining the leg portion included angle γ and the backrest portion included angle β at the angles required for the zero-gravity state, the seating portion driving slider 52 is driven to reciprocate along the seating portion driving push rod 51, thereby repeatedly changing the user's center of gravity while maintaining the user's body in the zero-gravity posture, so that the user increases the enjoyment and body sensation of rocking while maintaining the zero-gravity posture.

[0089] Further, as shown in Fig. 4, the lying state means a state in which the upper surface of the leg portion 30, the upper surface of the seating portion 20 and the upper surface of the backrest portion 40 are made to approach the same imaginary plane via driving of the driving devices. In the lying state, the leg portion angle γ and the backrest portion angle β are each close to 180°. For example, each of the leg portion angle γ and the backrest portion angle β has a difference of not more than 15° from 180°, thereby favorably maintaining the user's body in a posture close to lying. In the lying state, when the front side end portion of the upper surface of the seating portion 20 is slightly higher than the rear side end portion, it is easy to maintain the user's heart slightly lower than the lower limbs while maintaining the user in a state close to lying, thereby helping to assist the user in regulating blood circulation. In the present embodiment, the seating portion angle is formed as an angle of 5° to 20°.

[0090] When it is necessary for the chair frame 1 to be in the lying state, for example, the seating portion driving slider 52 can first be driven so that the seating portion 20 is caused to slide along the guide rail 12, thereby causing the seating portion angle α to be a prescribed angle, for example, 15 degrees. This seating portion angle α can be a prescribed angle set in advance or an angle set according to the user's selection. Then, the leg portion driving device 60 and the backrest portion driving device 70 are driven to adjust the leg portion angle γ and the backrest portion angle β to be angles close to 180°, respectively. Because the seating portion 20 can be caused to slide along the guide rail 12 integrally with the leg portion 30 and the backrest portion 40, it is also possible to first adjust the leg portion angle γ and the backrest portion angle β to be angles in the lying state and then adjust the seating portion angle α while maintaining the lying state, thereby becoming a lying state desired by the user. The various driving devices can also be driven synchronously.

[0091] As described above, the lying state does not mean that the user's body posture will be completely parallel to a horizontal plane or a certain plane when the user uses the chair frame 1, but the chair frame 1 can be brought into a lying state customized by the user by adjusting the relative positions of the leg portion 30, the seating portion 20 and the backrest portion 40. The leg portion angle γ and the backrest portion angle β in the lying state can also be a prescribed angle set in advance or an angle selected and customized by the user, for example, an angle in a range of 165° to 195° for each of the leg portion angle γ and the backrest portion angle β.

[0092] During the time in the lying state, the rocking motion described later can also be performed by repeatedly rotating the seating portion 20 about the guide rail 12. That is, while the leg portion angle γ and the backrest portion angle β are maintained as angles close to the lying state, the seating portion driving slider 52 is caused to reciprocally move along the seating portion driving push rod 51, thereby changing the user's center of gravity while maintaining the lying state, so that the user can have an experience of rocking while maintaining the lying posture.

[0093] Further, as shown in Fig. 5, the standing-aid state is a state in which the user is aided to stand up from the chair frame 1. In the standing-aid state, the front end of the upper surface of the seating portion 20 is lower than the rear end. For example, the seating portion angle a of the upper surface of the seating portion 20 with respect to the horizontal plane (the bottom surface of the base) can be formed to be an angle of 5° to 20°. Also, the backrest portion 40 is in a state of being erected with respect to the seating portion 20, for example, the backrest portion angle β is close to 90°. The standing-aid state can be one of the initial states, and the chair frame 1 can be in this state at the time of start-up, at the end, or in standby, or can be the initial state at the start of an arbitrary massage mode.

[0094] When it is necessary to cause the chair frame 1 to be in the standing-aid state, the seating portion drive slider 52 can be driven to move along the seating portion drive push rod 51, thereby causing the seating portion 20 to be in the second state. Also, the leg portion 30 and the backrest portion 40 can be driven to be in states suitable for the user to stand up. For example, the leg portion angle γ is made to be less than 270° but greater than 180°, and the backrest portion angle β is made to be an angle in the range of 80° to 110°. The above adjustment steps can be performed in no particular order. The backrest portion angle β can be adjusted after the seating portion angle a and the leg portion angle γ are adjusted, and the user can be further aided to stand up by giving a back-pushing force from the back to the front by the backrest portion.

[0095] Further, as shown in Fig. 6, the squeezing state is a state in which the backrest portion angle β between the seating portion 20 supporting the user's hips and the backrest portion 40 supporting the user's back is adjusted to narrow the backrest portion angle, and the user's back and lower limbs are gradually brought close to each other to exercise the muscle groups of the user's hips, waist, and back. In the squeezing state, the lower limbs are stretched as much as possible, and the leg portion angle γ is close to 180° (for example, the leg portion angle γ is in the range of 165° to 195°), and the user's feet together with the lower limbs as a whole have a tendency to be close to the back, and the squeezing waist effect can be further increased, and the body sensation of stretching the back in the forward direction can be increased. For example, the backrest portion angle β can be an angle selected by the user or a predetermined angle, for example, 90° to 140°. In the squeezing state, it is preferable that the front end of the upper surface of the seating portion 20 be higher than the rear end. That is, while the seating portion 20 is kept in the first state, the leg portion angle γ is close to 180°, and the backrest portion angle β is a predetermined angle.

[0096] During the time of maintaining the squeezing state, the seating portion 20 can also be repeatedly rotated about the guide rail 12 by driving the seating portion 20, and the rocking motion described later can be performed. That is, while the leg portion angle γ and the backrest portion angle β are maintained to be the angles in the squeezing state, the seating portion drive slider 52 is driven to reciprocate along the seating portion drive push rod 51, thereby changing the center of gravity of the user while maintaining the squeezing state, and giving the user a different experience.

[0097] Further, as shown in Fig. 7, the stretching state refers to a state in which the leg portion 30 is moved away from the back portion 40 and / or the back portion 40 is moved away from the leg portion 30 by driving the leg portion 30, the seating portion 20 and the back portion 40 by the driving devices.

[0098] As described above, by controlling the seating portion driving device 50, the leg portion driving device 60 and the back portion driving device 70 (in the illustrated example, by adjusting the extension amount and the extension speed of the push rod, the seating portion angle a, the leg portion angle γ and the back portion angle β are changed), the chair frame 1 can present various massage modes to provide various massage postures to the user. The various massage modes can be switched to each other conveniently to change the massage posture. For example, a first squeezing and stretching mode, a second squeezing and stretching mode and a swinging mode can also be performed.

[0099] Here, in the first squeezing and stretching mode, the seating portion 20 is adjusted to stop at a proper position (for example, the position shown in Fig. 6), and then the leg portion driving device 60 and the back portion driving device 70 are controlled respectively to adjust the leg portion angle γ between the leg portion 30 and the seating portion 20 and the back portion angle β between the back portion 40 and the seating portion 20. Thus, in the state in which the inclination of the user's thigh and hip relative to the horizontal plane is relatively fixed, the squeezing and stretching of the user's leg, waist and back are realized by changing the leg portion angle γ and the back portion angle β. For example, when the leg portion angle γ and the back portion angle β are increased synchronously, the leg portion and the back portion move away from each other to drive the user's lower limbs and back to spread, realizing the stretching effect, and when the leg portion angle γ and the back portion angle β are decreased synchronously, the leg portion and the back portion move close to each other to drive the user's lower limbs and back to close, realizing the squeezing effect. Here, the leg portion angle γ can be set to be not less than 180 degrees, and the back portion angle β can be set to be not less than 90 degrees.

[0100] Further, in the second squeezing and stretching mode, the seating portion 20 is rotated relative to the base 10. For example, starting from the state shown in Fig. 6, the seating portion 20 is moved from the front end of the guide rail 12 to the rear end of the guide rail 12 (the seating portion driving block 52 is moved from the front end of the seating portion driving push rod 51 to the rear end), and the seating portion angle a is changed gradually. At the same time when the seating portion angle a is changed, the back portion angle β formed by the upper surface of the seating portion 20 relative to the upper surface of the back portion 40 is also changed. Similarly, when the back portion angle β is decreased, the leg portion 30 and the back portion 40 move close to each other synchronously, and when the back portion angle β is increased, the leg portion 30 and the back portion 40 move away from each other synchronously. Thus, the leg portion 30 and the back portion 40 are repeatedly moved close to each other synchronously and moved away from each other synchronously, thereby providing the user with the feeling of repeatedly squeezing and stretching.

[0101] In the process of realizing the above-mentioned compression and stretching in the second stretching mode, the seat part driving device 50 cooperates with the back part driving device 70 to realize the increase and decrease of the back part included angle β in the state that the inclination angle of the back part 40 relative to the horizontal plane is substantially unchanged (the change range is small, for example, within 10 degrees), so as to be able to compress and stretch the waist and abdomen of the user. For example, the leg part included angle γ formed by the upper surface of the seat part 20 relative to the upper surface of the leg part 30 can be substantially unchanged. Specifically, according to the present embodiment, when the seat part driving device 50 moves the seat part 20 backward, the functional assembly including the leg part 30, the seat part 20 and the back part 40 will have a tendency to move backward. When the seat part 20 moves backward along the guide rail 12, if the back part included angle is unchanged, the seat part 20 will cause the back part 40 to have a tendency to move backward and upward. In the process of the back part 40 moving backward and upward, the included angle of the back part 40 relative to the horizontal plane will become larger. Therefore, when the seat part 20 causes the back part 40 to slide backward and upward along the guide rail 12, it is necessary to retract the push rod of the back part driving device 70 to cause the back part 40 to rotate downward relative to the seat part 20, so as to have the effect of reducing the included angle of the back part 40 relative to the horizontal plane while increasing the back part included angle (realizing stretching), thereby realizing that the inclination angle of the back part 40 relative to the horizontal plane does not change. Thus, in the stretching of the present mode, by synchronously performing "causing the back part 40 to move backward and upward along the guide rail 12 via the seat part 20" and "causing the back part 40 to rotate downward relative to the seat part 20 by means of the push rod", the inclination angle of the back part 40 relative to the horizontal plane can be substantially unchanged. Similarly, in the compression of the present mode, by synchronously performing "causing the back part 40 to move forward and downward along the guide rail 12 via the seat part 20" and "causing the back part 40 to rotate upward relative to the seat part 20 by means of the push rod", the inclination angle of the back part 40 relative to the horizontal plane can be substantially unchanged. That is, the change of the inclination angle of the back part 40 when sliding along the guide rail 12 is absorbed by the rotation angle of the back part 40 relative to the seat part 20, so as to ensure that the inclination angle of the back part 40 relative to the horizontal plane is substantially unchanged in the process of compression and stretching.

[0102] In addition, in the rocking mode, the seat portion 20 is rotated relative to the base 10, and the leg portion angle γ and the back portion angle β can remain unchanged. That is, only by changing the seat portion angle α, the functional assembly is pushed, and when the seat portion 20 reciprocates with the position of the seat portion bottom surface parallel to the base bottom surface as the center, the functional assembly as a whole also reciprocates along the guide rail 12, realizing the rocking mode of the functional assembly as a whole. Since the leg portion angle γ and the back portion angle β can be set to any angle, the chair frame 1 can rock in any massage mode thereof, and the user can rock along the guide rail 12 in the corresponding posture. In addition, the leg portion driving device 60 and the back portion driving device 70 are both hingedly arranged on the seat portion 20 and perform extension and contraction relative to the seat portion 20, while the seat portion driving device 50 is hingedly arranged on the base 10 below the seat portion 20. The driving actions of the leg portion driving device 60 and the back portion driving device 70 do not interfere with the driving action of the seat portion driving device 50. Thus, when the seat portion driving device 50 drives the entire functional assembly in the rocking mode, the leg portion angle and the back portion angle are both in an adjustable state. That is, during the operation of the rocking mode, the leg portion driving device 60 and the back portion driving device 70 can also be controlled to change the leg portion angle and / or the back portion angle.

[0103] It can be seen that when the chair frame 1 is adjusted to any massage mode (the initial state, the zero-gravity state, the lying state, the standing-assisting state, the squeezing state, and the stretching state, etc.) described above, the sequence of adjusting the leg portion angle γ, the back portion angle β, and the seat portion angle α can not be limited, that is, the chair frame 1 can be adjusted to the required massage mode. For example, when switching from the lying state to the zero-gravity state, the leg portion angle γ and the back portion angle β can be adjusted after the seat portion angle α is converted to the seat portion angle α of the zero-gravity state, or the leg portion angle γ and the back portion angle β can be adjusted to the angles required for the zero-gravity state, and then the seat portion angle α is changed by driving the seat portion driving device to switch to the zero-gravity state. Of course, the adjustment can also be performed simultaneously. When adjusting from any massage mode to another massage mode, the leg portion angle γ and the back portion angle β can be ensured, the seat portion angle α can be changed by driving the seat portion 20 to rotate relative to the base 10, and the chair frame 1 can be simply switched to the seat portion angle α required for the other massage mode. The center of gravity of the user can also be simply and controllably changed by changing the seat portion angle while keeping the leg portion angle γ and the back portion angle β, that is, keeping the posture of the user unchanged, so as to adjust the massage body sensation. Even when the massage is performed in the same posture, the massage intensity applied to the user from the chair frame 1 is different when the center of gravity of the user relative to the chair frame 1 changes, thereby bringing different body sensations to the user.

[0104] The following describes the transition of the massage mode of the chair frame 1, taking the zero-gravity state illustrated in Fig. 3 and the squeezing state illustrated in Fig. 6 as examples. For example, the seating portion included angle a in the zero-gravity state illustrated in Fig. 3 is the same as the seating portion included angle a in the squeezing state illustrated in Fig. 6.

[0105] When transitioning from the zero-gravity state to the squeezing state, the leg portion included angle y decreases from a large angle to a small angle, the backrest portion included angle β decreases from a large angle to a small angle, and the seating portion included angle a remains unchanged. When the leg portion drive device drives the leg portion 30 to rotate relative to the seating portion 20, the leg portion included angle y decreases from a large angle to a small leg portion included angle y of approximately 180° required for the squeezing state, whereby the lower limbs of the user are gradually raised from a bent state to a straightened state; when the backrest portion drive device drives the backrest portion 40 to rotate relative to the seating portion 20, the backrest portion included angle β decreases from a large angle to a small angle required for the squeezing state, whereby the back of the user and the waist of the user between the hips are changed from a relatively relaxed posture to a relatively squeezed posture, so that the muscle groups of the back and the waist are squeezed.

[0106] When transitioning from the squeezing state to the zero-gravity state, the chair frame 1 operates in the opposite manner to the above. During the process in which the leg portion included angle y increases, the lower limbs of the user are gradually bent from a straightened state, and the thighs of the user are stretched. During the process in which the backrest portion included angle β increases, the back of the user and the waist of the user are again relaxed, thereby achieving a stretching effect on the body. If the leg portion included angle y and the backrest portion included angle β are simultaneously increased by driving the leg portion drive device and the backrest portion drive device, the thighs, the hips, and the waist can be simultaneously stretched, thereby enhancing the stretching effect. When the seating portion 20 is in the first state (for example, the seating portion included angle a is 15-50°), that is, the front side of the thighs of the user (knee side) is higher than the hips of the user, if the leg portion included angle y and the backrest portion included angle β are gradually increased, the center of gravity of the user is further away from the thighs as the backrest portion included angle β increases, thereby enhancing the stretching effect on the thighs, the waist, and the back. As described above, the squeezing state, the zero-gravity state, and the like can be provided as independent massage states, or can provide a body sensation with a massage effect to the user during the transition by mutual transition with other massage states. The mutual transition between different massage states can be repeatedly performed.

[0107] The upper surface of the seating portion 20 in the present example can be a surface corresponding to the portion of the seating portion cover portion that contacts the hips and the thighs of the user during use, or can be the plane on which the seating top portion 22 is located. The upper surface of the backrest portion 40 in the present example can be a surface corresponding to the portion of the backrest portion cover portion that contacts the back of the user during use, or can be the front side surface of the backrest portion 40. The upper surface of the leg portion 30 in the present example can be a surface corresponding to the portion of the leg portion cover portion that contacts the lower legs of the user during use, or can be the front side surface of the leg portion 30.

[0108] In the above embodiments, the adjustment method is not limited when adjusting different angles. For example, the angle sensor can be used for measurement and adjustment, or the push rod movement distance of the driving device can be calibrated and calculated.

[0109] According to the chair frame 1 of the embodiment, the chair frame 1 comprises a base 10, a seat part 20 supported on the base 10 via an arc-shaped guide rail 12 and capable of rotating relative to the base 10, a seat part driving device 50 driving the seat part 20 to rotate relative to the base 10 so as to change a seat part angle a between the seat part 20 and the base 10, a backrest part 40 connected to the seat part 20 in a manner capable of rotating relative to the seat part 20, and a backrest part driving device 70 driving the backrest part 40 to rotate relative to the seat part 20 so as to change a backrest part angle β between the backrest part 40 and the seat part 20. Therefore, in a state where a user sits on the seat part 20 and leans against the backrest part 40, through the rotation of the backrest part 40 relative to the seat part 20 under the driving of the backrest part driving device 70, the stretching and pressing between the waist and abdomen (and the thigh) and the lower leg to the foot can be further realized, so as to realize the stretching and pressing of the multi-joint area from the trunk to the foot. Further, when the seat part 20 rotates relative to the base 10 under the driving of the seat part driving device, the functional assembly including the leg part 30, the seat part 20 and the backrest part 40 can be driven to reciprocate forward and backward under the support of the base 10, so as to change the center of gravity of the body in a state where the body of the user is kept in any stretching and pressing posture, and a variety of massage modes can be realized.

[0110] In addition, according to the chair frame 1 of the embodiment, the angle of the trunk and the leg of the user, the angle of the leg and the foot, and the posture of the human body as a whole can be adjusted, so as to change the center of gravity of the body in a state where the human body is kept in a certain fixed posture, and the corresponding massage experience can be enhanced. For example, when the human body is in a zero-gravity state, if the seat part 20 is driven to drive the chair frame 1 to swing, the floating feeling brought by the swing can enhance the comfort in the zero-gravity state, so that the user can feel a light, floating and soft swing feeling, and the relaxation and comfort of the body can be further enhanced. If the human body is adjusted to a lying state and then the seat part 20 is driven to drive the chair frame 1 to swing, the human body can be floated and feel the swing, which is helpful to relaxation.

[0111] The above description of the application is exemplary in combination with the drawings, and it is obvious that the specific implementation of the application is not limited by the above embodiments.

[0112] For example, in the above embodiment, the chair frame 1 is capable of forming the zero-gravity state, the lying state, the standing-assisted state, the squeezing state, and the stretching state, but is not limited thereto, and the chair frame 1 can form only part of the zero-gravity state, the lying state, the standing-assisted state, the squeezing state, and the stretching state.

[0113] Further, in the above embodiment, the chair frame 1 is capable of executing the first squeezing-stretching mode, the second squeezing-stretching mode, and the rocking mode, but is not limited thereto, and the chair frame 1 can execute only part of the first squeezing-stretching mode, the second squeezing-stretching mode, and the rocking mode, and can execute other modes instead of the above modes.

[0114] Further, in the above embodiment, the posture of the seating portion 20, the leg portion 30, and the backrest portion 40 in the initial state can be set according to the user's usage habit, and is presented and stored as an initial state customized for the user, and similarly, the posture of the seating portion 20, the leg portion 30, and the backrest portion 40 in other states such as the zero-gravity state and the lying state can also be customized by fine adjustment, so that the user can more conveniently explore a more comfortable massage posture.

[0115] Further, in the above embodiment, the upper surface of the seating portion 20 is higher than the both end portions of the guide rail 12 in the entire movement range of the seating portion 20, but is not limited thereto, and can be such that the upper surface of the seating portion 20 is higher than the both end portions of the guide rail 12 only in part of the movement range of the seating portion 20, or can be such that the upper surface of the seating portion 20 is lower than the both end portions of the guide rail 12 in the entire movement range of the seating portion 20.

[0116] Further, in the above embodiment, the specific structures of the base 10, the leg portion 30, the backrest portion 40, the seating portion driving device 50, the leg portion driving device 60, and the backrest portion driving device 70 can be appropriately changed as needed.

[0117] Further, in the above embodiment, the base 10 has the guide rail 12 and the seating portion 20 has the fitting portion movably engaged with the guide rail 12, but is not limited thereto, and the seating portion 20 can have the guide rail 12 and the base 10 can have the fitting portion movably engaged with the guide rail 12.

[0118] Further, in the above embodiment, the leg portion 30 and the leg portion driving device 60 can be omitted, and the pedal portion 80 can also be omitted.

[0119] It should be understood that, within the scope of the present application, each part of the embodiments can be freely combined, or each part of the embodiments can be appropriately changed or omitted.

Claims

1. A chair frame, characterized in that, include: Base; A seat portion that is rotatably supported on the base; A seat drive device is connected to the base and the seat, and drives the seat to rotate relative to the base; A backrest that is rotatably connected to the seat. as well as A backrest drive device is connected to both the seat and the backrest, and drives the backrest to rotate relative to the seat. The seat is supported on the base via an arc-shaped guide rail.

2. The chair frame as described in claim 1, characterized in that, When the seat or the base slides relative to each other along the guide rail, the seat undergoes a relative displacement relative to the base as the included angle of the seat changes.

3. The chair frame as described in claim 2, characterized in that, During the movement of the seat or the base along the guide rail, it can present at least one of a first state and a second state. In the first state, the front end of the upper surface of the seat is higher than the rear end; in the second state, the front end of the upper surface of the seat is lower than the rear end. During the movement of the seat or the base along the guide rail, it can also present an intermediate state in which the front end and the rear end of the upper surface of the seat are approximately flush.

4. The chair frame as described in claim 2, characterized in that, The guide rail is formed in an arc shape, with the central part lower than the two ends. Throughout the entire range of motion of the seat, the upper surface of the seat is positioned above both ends of the guide rail.

5. The chair frame as described in claim 1, characterized in that, Also includes: The legs are rotatably connected to the seat. as well as A leg drive device is connected to the seat and the leg respectively, and drives the leg to rotate relative to the seat.

6. The chair frame as described in claim 5, characterized in that, The seat drive device is located in the vertical direction between the bottom surface of the base and the bottom surface of the seat. The leg drive device and the backrest drive device are located in the vertical direction between the upper surface of the seat and the bottom surface of the seat.

7. The chair frame as described in claim 5, characterized in that, The leg drive device includes: A leg-driven push rod having a first portion and a second portion capable of relative movement, the first portion being rotatably connected to the seat portion; and A leg drive link, the rear end of which is rotatably connected to the second part, and the front end of which has a roller supporting the leg.

8. The chair frame as described in claim 1, characterized in that, The seating unit drive device includes: A seat-mounted drive push rod, rotatably connected to one of the base and the seat-mounted portion; and A seat drive slider is movable along the seat drive push rod and is rotatably connected to the other of the base and the seat.

9. The chair frame as described in claim 1, characterized in that, The backrest drive device includes a backrest drive push rod. The backrest drive lever has a first part and a second part that are movable relative to each other. The first part is rotatably connected to one of the seat and the backrest. The second part is rotatably connected to the other of the seat and the backrest.

10. The chair frame as described in claim 5, characterized in that, It has at least one of the following states: zero gravity, standing assistance, lying flat, compression, and tension. In the zero-gravity state, the seat angle is a specified angle, the leg angle is any angle within a specified range, and the backrest angle is any angle within a specified range. In the standing position, the included angle of the seating portion is such that the front end of the upper surface of the seating portion is lower than or approximately level with the rear end. In the reclining position, the seat angle is a predetermined angle, and the leg angle and the backrest angle are both close to 180°. In the compressed state, the included angle of the seating portion is a predetermined angle, the legs are controlled to rotate relative to the front end of the seating portion and gradually move towards the backrest from the upper front of the seating portion, and the backrest is controlled to rotate relative to the rear end of the seating portion and gradually move towards the legs from the upper rear of the seating portion. In the stretched state, the legs and the backrest are separated from each other.

11. The chair frame as described in claim 5, characterized in that, It has at least one of a first extrusion-stretch mode, a second extrusion-stretch mode, and a rocking mode. In the first compression and stretching mode, the seat angle is a predetermined angle, and the legs and the backrest are controlled to rotate relative to the seat to change the leg angle and backrest angle, respectively, repeatedly moving synchronously closer and farther apart. In the second compression and stretching mode, the leg angle is a predetermined angle, and the seat portion rotates relative to the base, causing the seat angle to change, and the backrest angle also changes. In the rocking mode, the seat portion rotates relative to the base, causing the included angle of the seat portion to change, which in turn drives the functional components, including the legs, the seat portion and the backrest, to reciprocate relative to the base.

12. A massage device, characterized in that, A chair frame having any one of claims 1 to 11.

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