Body care device

Abstract

A body care device is disclosed. The body care device of the present invention comprises a base frame, a seat frame, a backrest frame, and first, second, and third link apparatuses. The first link apparatus comprises a first link. The first link apparatus is connected to the base frame to allow forward and backward movement of the first link. The second link apparatus comprises a link 2a fixed to the first link. The second link apparatus connects the seat and backrest frames so that the latter stands upright or lies back. The third link apparatus links the movements of the first and second link apparatuses so as for the backrest frame to be laid flat toward the back as the seat frame moves forward.

Description

Body care devices

[0001] The present invention relates to a body care device, and more particularly, to a body care device capable of providing a massage by physically stimulating the body of a seated user.

[0002] With the recent aging of society, awareness of health management, health maintenance, and health promotion is increasing across all age groups. Consequently, many people are utilizing facilities such as medical facilities or sports clubs to manage, maintain, or improve their health.

[0003] Additionally, many people are striving to recover from fatigue and relieve stress, just as they are striving to maintain or improve their health and fitness. To this end, various body care devices, such as massagers, have been developed and are widely used in everyday life.

[0004] Massage is a medical auxiliary therapy that promotes blood circulation and relieves fatigue by using hands or special tools to stroke, knead, press, pull, tap, or move the body. Massage equipment is a mechanical device that performs massage, and various mechanical elements are incorporated into massage equipment to ensure effective results.

[0005] Among these, the massage chair is an electric chair that massages the body on a seated chair structure. Recently, interest in it is increasing not only among the middle-aged and elderly, but also among office workers suffering from chronic fatigue and stress, and young women who are interested in beauty and dieting.

[0006] Japanese Patent Publication No. 2024-519174 (hereinafter referred to as “Prior Document 1”) discloses “a linkage device, a bracket, a seat unit, and a seat for realizing zero backrest clearance.” The seat unit includes a base, a linkage mechanism, a bracket side plate, a backrest mechanism, and a seat backrest.

[0007] The linkage mechanism is rotatably connected between the base and the bracket side plate. The bracket side plate is rotatably connected to the backrest mechanism at the backrest point. The backrest mechanism is rotatably connected to the bracket side plate and the linkage mechanism, respectively. The backrest mechanism includes a backrest mounting member and a backrest linkage member. Both ends of the backrest mounting member are rotatably connected between the backrest point and the backrest linkage member.

[0008] According to the above prior art document 1, the overall height can be lowered as the seat backrest tilts backward, but since the seat backrest does not tilt to 180 degrees, the user can only lean backward and cannot lie down completely.

[0009] U.S. Patent No. 9,433,295 (hereinafter referred to as “Prior Art 2”) discloses a “Zerowall motorized multi-position recliner chair mechanism,” wherein the recliner chair mechanism includes a base rail, a footrest support bracket, a backrest support bracket, and a seat rail.

[0010] The footrest support bracket forms a fixed link, and a second footrest actuating link and a third footrest actuating link are connected to pivot pins on both sides of the fixed link. The second footrest actuating link is connected to the first footrest actuating link, and the third footrest actuating link is connected to the fourth footrest actuating link. The third footrest actuating link and the fourth footrest actuating link are rotatably connected to each other. The footrest support bracket moves forward and backward by the linkage structure of the first footrest actuating link, the second footrest actuating link, the third footrest actuating link, and the fourth footrest actuating link. The footrest support bracket rises above the seat rail while moving backward by the linkage structure.

[0011] According to the aforementioned prior art document 2, as the backrest support bracket reclines, the footrest support bracket moves rearward by the linkage structure. However, as the footrest support bracket moves rearward and rises above the seat rail, the user's feet may rise excessively during the reclining process. Furthermore, since the backrest support bracket does not tilt backward 180 degrees, the user is limited to only leaning backward and not fully reclining.

[0012] The present invention aims to solve the above problems of a body care device that provides care for the body of a seated user.

[0013] Specifically, the purpose is to provide a body care device that can be reclining by a single driving device regardless of the presence or absence of free space behind the backrest by optimizing the reclining structure.

[0014] In addition, the present invention aims to provide a body care device that can recline up to 180° by optimizing the operating structure of the seat and backrest.

[0015] In addition, the present invention aims to provide a body care device that can smoothly change the angle of the seat when using the reclining function and provide a comfortable seating experience to the user.

[0016]

[0017] The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present invention belongs from the description below.

[0018] The body care device described in the present application may include a base frame, a seat frame, a backrest frame, a first link device part, a second link device part, and a third link device part.

[0019] The first link device unit may include a first link. The first link device unit may be connected to the base frame to enable forward and backward movement of the first link.

[0020] The second link device may include a second a link fixed to the first link. The second link device may connect the seat frame and the backrest frame so that the backrest frame can stand up or lie back.

[0021] The third link device unit can link the movements of the first link device unit and the second link device unit so that the seat frame moves forward and the backrest frame reclines backward.

[0022] The body care device described in the present application may include a reclining drive unit that provides power to a third linkage unit so that the backrest frame reclines backward as the seat frame moves forward.

[0023] The second link device unit may include a second seat fixing link, a second backrest fixing link, and a second b link.

[0024] The second seat fixing link may be formed in the seat frame parallel to the second a link. The second seat fixing link may form a four-section link of a equilibrium quadrilateral together with the second a link.

[0025] The second backrest fixing link can be formed in the backrest frame.

[0026] The second b link may be parallel to the second backrest fixing link. The second b link may form a four-section link of a equilibrium quadrilateral together with the second backrest fixing link.

[0027] The rear joint of the second a link and the front joint of the second b link may be on the same axis.

[0028] The second a-link can be rotatably connected to the front joint of the second backrest fixed link.

[0029] The second b-link can be rotatably connected to the rear joint of the second seat fixed link.

[0030] The first link device unit may include a first fixed link and a first connecting link device unit.

[0031] The first fixed link can be formed on the base frame parallel to the first link.

[0032] The first connecting link device unit can connect the first fixed link and the first link so that the first link can move forward and backward in a state parallel to the first fixed link.

[0033] The first connecting link device unit may include a first a fixed connecting link, a first a movable connecting link, a first b fixed connecting link, and a first b movable connecting link.

[0034] The first fixed connecting link can be connected to the upper joint of the first fixed link.

[0035] The first a motion connecting link can connect the lower joint of the first a fixed connecting link and the upper joint of the first link.

[0036] The first fixed connecting link can be connected to the lower joint of the first fixed link.

[0037] The first b motion connecting link can connect the upper joint of the first b fixed connecting link and the lower joint of the first link.

[0038] The first connecting link device unit may include a first a additional connecting link and a first b additional connecting link.

[0039] The first additional connecting link can connect the lower joint of the first fixed connecting link to the first movable connecting link.

[0040] The first additional connecting link may be parallel to the first additional connecting link. The first additional connecting link may connect the upper joint of the first movable connecting link to the first fixed connecting link.

[0041] The third link device unit may include a third link, a third backrest linkage link, and a third device unit linkage link.

[0042] The third link can be rotatably connected to the first axis of the base frame.

[0043] The third backrest link can connect the rear joint of the third link to the backrest frame.

[0044] The third device linkage can connect the front joint of the third link to the first fixed connection link.

[0045] The reclining drive unit can rotate the third link around the first axis.

[0046] The reclining actuator may be rotatably connected to a first point of the base frame and a second point of the third backrest link. The reclining actuator may be formed of a linear actuator that extends between the first point and the second point.

[0047] The first link device unit, the second link device unit, and the third link device unit may be provided on the left and right sides of the base frame, respectively.

[0048] According to a body care device according to an embodiment of the present invention, the third link device can link the movements of the first link device and the second link device so that the backrest frame lies down backward as the seat frame moves forward. In addition, the third link device can link the movements of the first link device and the second link device so that the backrest frame stands up as the seat frame moves backward. Therefore, since the seat part and the backrest part are synchronized by a mechanical mechanism without separate electronic control and constantly change into the first posture, the second posture, and the third posture, a comfortable seating feeling can be provided to a user leaning against the backrest while sitting on the seat part.

[0049] According to a body care device according to an embodiment of the present invention, when the posture of the seat and the backrest changes from the first posture to the second posture and the third posture, the seat frame moves forward and the backrest frame can lie down backward. When the posture of the seat and the backrest changes from the third posture to the second posture and the first posture, the seat frame moves backward and the backrest frame can stand forward. Therefore, when the posture of the seat and the backrest changes from the first posture to the second posture and the third posture, the rear end of the backrest can be positioned within a predetermined distance in the front-back direction. Therefore, reclining can be performed regardless of the presence or absence of free space at the rear of the backrest.

[0050] According to a body care device according to an embodiment of the present invention, the first connecting link device may be a link device (link work) connecting the first fixed link and the first link so that the first link can move forward and backward while the first fixed link and the first link are parallel to each other. Therefore, even if the first link moves forward and backward by the first connecting link device, the second a link may not rotate around the X-axis. The second seat fixing link may be formed on the seat frame in parallel with the second a link. The second seat fixing link may form a four-section link of a parallelogram together with the second a link. Even if the first link moves forward and backward by the first connecting link device, the second a link may not rotate around the X-axis. Therefore, even if the first link moves forward and backward by the first connecting link device, the second seat fixing link may not rotate around the X-axis. Accordingly, even if the first link moves forward and backward by the first connecting link device, the first seating surface may not rotate. Accordingly, even if the postures of the seat and backrest change to the first, second, and third postures, a comfortable seating experience can be provided to the user sitting on the seat.

[0051] According to a body care device according to an embodiment of the present invention, the first link, the first fixed link, the firsta fixed connection link, the firsta motion connection link, the firstb fixed connection link, the firstb motion connection link, the firsta additional connection link, and the firstb additional connection link can form a rigid parallelogram 8-section link. Therefore, when the 1b fixed connection link rotates around the lower joint of the first fixed link, the first link can move forward and backward while the first fixed link and the first link are parallel to each other. Alternatively, when the 1a fixed connection link rotates around the upper joint of the first fixed link, the first link can move forward and backward while the first fixed link and the first link are parallel to each other. At this time, the first link can be suppressed from moving due to the rigid structure of the parallelogram 8-section link.

[0052] According to a body care device according to an embodiment of the present invention, a second backrest fixing link may be formed in a backrest frame. The second b link may be parallel to the second backrest fixing link. The second b link may form a four-section link of a parallelogram together with the second backrest fixing link. The rear joint of the second a link and the front joint of the second b link may be coaxial. That is, the rear joint of the second a link and the front joint of the second b link may be formed as a single joint (hereinafter referred to as the 'first joint'). The second a link may be rotatably coupled to the front joint of the second backrest fixing link. That is, the joints on both sides of the second a link and the front joint of the second backrest fixing link may form a three-section link shape. Therefore, the second a link may rotate around the front joint of the second backrest fixing link. The second b link may be rotatably coupled to the rear joint of the second seat fixing link. That is, the joints on both sides of the second b link and the rear joint of the second seat-fixing link can form a three-section link shape. Therefore, the second b link can rotate around the rear joint of the second seat-fixing link. Accordingly, when the second a link rotates around the second seat-fixing link, the center of rotation of the backrest frame with respect to the seat frame can be located at the user's pelvis. Therefore, even if the postures of the seat and backrest change to the first, second, and third postures, a comfortable seating experience can be provided to the user sitting on the seat.

[0053] According to a body care device according to an embodiment of the present invention, when the second a link rotates around the second seat fixed link, the center of rotation of the backrest frame with respect to the seat frame can be located above the first joint. Therefore, in the third posture of the seat and backrest, the first and second seating surfaces can be parallel to each other. Therefore, complete reclining up to 180° can be possible.

[0054] FIG. 1 is a perspective view of a body care device according to an embodiment of the present invention viewed from the front upper side, showing a state in which the backrest frame is erected at an angle.

[0055] FIG. 2 is a front view of a body care device according to an embodiment of the present invention.

[0056] FIG. 3 is a perspective view of a body care device according to an embodiment of the present invention viewed from the front upper side, showing a state in which the backrest frame is lying backwards.

[0057] FIG. 4 is a side view of a body care device according to an embodiment of the present invention, showing a first link device part in a first posture of a seat frame and a backrest frame.

[0058] FIG. 5 is a side view of a body care device according to an embodiment of the present invention, showing a first link device part in a second posture of a seat frame and a backrest frame.

[0059] FIG. 6 is a side view of a body care device according to an embodiment of the present invention, showing a first link device part in a third posture of a seat frame and a backrest frame.

[0060] FIG. 7 is a cross-sectional view taken along line AA' of a body care device according to an embodiment of the present invention (see FIG. 2), showing a second link device part in a first posture of a seat frame and a backrest frame.

[0061] FIG. 8 is a cross-sectional view taken along line AA' of a body care device according to an embodiment of the present invention (see FIG. 2), showing a second link device part in a second posture of a seat frame and a backrest frame.

[0062] FIG. 9 is a cross-sectional view taken along line AA' of a body care device according to an embodiment of the present invention (see FIG. 2), showing a second link device part in a third posture of a seat frame and a backrest frame.

[0063] FIG. 10 is a side view of a body care device according to an embodiment of the present invention, showing a third link device part in a first posture of a seat frame and a backrest frame.

[0064] FIG. 11 is a side view of a body care device according to an embodiment of the present invention, showing a third link device part in a second posture of a seat frame and a backrest frame.

[0065] FIG. 12 is a side view of a body care device according to an embodiment of the present invention, showing a third link device part in a third posture of a seat frame and a backrest frame.

[0066] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, in describing the present invention, descriptions of functions or configurations already known will be omitted to clarify the gist of the present invention.

[0067] The X direction, the Y direction, and the Z direction described in the embodiments of the present invention may each be directions that are orthogonal to each other. Each of the X direction and the Y direction may be a direction parallel to the horizontal direction, and the Z direction may be a direction parallel to the vertical direction. When the X direction is a direction parallel to the left-right direction, the Y direction may be a direction parallel to the front-back direction. When the X direction is a direction parallel to the front-back direction, the Y direction may be a direction parallel to the left-right direction.

[0068] Hereinafter, front may refer to the direction pointed by the X-axis arrow, and back may refer to the opposite side to the direction pointed by the X-axis arrow. Hereinafter, top may refer to the direction pointed by the Z-axis arrow, and bottom may refer to the opposite side to the direction pointed by the Z-axis arrow.

[0069]

[0070] FIG. 1 is a perspective view of a body care device (1000) according to an embodiment of the present invention, viewed from the front upper side, showing a state in which the backrest frame (310) is erected at an angle.

[0071] FIG. 2 is a front view of a body care device (1000) according to an embodiment of the present invention.

[0072] FIG. 3 is a perspective view of a body care device (1000) according to an embodiment of the present invention viewed from the front upper side, showing a state in which the backrest frame (310) is lying backward.

[0073] A body care device (1000) according to an embodiment of the present invention may be a massage chair that provides care for the body of a seated user.

[0074] A body care device (1000) according to an embodiment of the present invention may include a base frame (100), a seat portion (200), and a backrest portion (300).

[0075] When using the body care device (1000), the seat (200) can support the lower body including the user's buttocks. The seat (200) can have a front-to-back length longer than a left-to-right width.

[0076] The seat part (200) may include a seat frame (210) and a seat cover (220).

[0077] The seat frame (210) may form the skeleton of the seat portion (200). The seat frame (210) may have a generally rectangular shape. The seat frame (210) may be manufactured by joining a plurality of angle pipes and plates together. The seat frame (210) may include metal and / or plastic materials.

[0078] The seat frame (210) can support the lower body including the user's buttocks. The seat frame (210) can have a front-to-back length longer than a left-to-right width.

[0079] A seat cover (220) may be coupled to a seat frame (210). The seat cover (220) may form a first seating surface (221). The first seating surface (221) may refer to a surface on which the lower body, including the user's buttocks, is seated. The seat cover (220) may include plastic, fabric, natural leather, and / or artificial leather materials.

[0080] The seat part (200) may include a seat massage part.

[0081] The seat massage unit can be connected to the seat frame (210) and / or the seat cover (220) under the first seating surface (221). The seat massage unit can massage the lower body including the buttocks of the user seated on the first seating surface (221). The first seating surface (221) can include a soft material such as cloth, natural leather, and / or artificial leather. The seat massage unit can tap, knead, roll, and apply acupressure to the lower body of the user through the first seating surface (221).

[0082] The body care device (1000) may include a control unit. The control unit may control a seat massage unit.

[0083] When using the body care device (1000), the backrest (300) can support the user's upper body, including the head, neck, back, and waist. The backrest (300) can have a vertical length longer than the left-right width.

[0084] The backrest part (300) may include a backrest frame (310) and a backrest cover (320).

[0085] The backrest frame (310) may form the skeleton of the backrest portion (300). The backrest frame (310) may have a generally rectangular shape. The backrest frame (310) may be manufactured by joining a plurality of angle pipes and plates together. The backrest frame (310) may include metal and / or plastic materials.

[0086] The backrest cover (320) may be coupled to the backrest frame (310). The front surface of the backrest cover (320) may form a second seating surface (321). The second seating surface (321) may refer to a surface on which the user's upper body, including the back and waist, is seated. The backrest cover (320) may include plastic, fabric, natural leather, and / or artificial leather materials.

[0087] The backrest (300) may include a backrest massage part.

[0088] The backrest massage unit can be connected to the backrest frame (310) and / or the backrest cover (320) at the back of the second seating surface (321). The backrest massage unit can massage the upper body, including the back and waist, of a user seated on the second seating surface (321). The second seating surface (321) can include a soft material such as cloth, natural leather, and / or artificial leather. The backrest massage unit can tap, knead, roll, and apply acupressure to the upper body of the user through the second seating surface (321).

[0089] The body care device (1000) may include a control unit. The control unit may control a backrest massage unit.

[0090] The base frame (100) can support the load of the seat portion (200) and the backrest portion (300) on the floor surface. The base frame (100) can have a front-to-back length longer than a left-right width.

[0091] The base frame (100) can be formed in a roughly rectangular prism shape. The base frame (100) can be manufactured by joining a plurality of angle pipes and plates together. The base frame (100) can include metal and / or plastic materials.

[0092] The body care device (1000) may include various sensors. When a user sits on the seat (200), the sensor may detect this. The control unit may receive a signal from the sensor and automatically initiate operation.

[0093] When a user sits on the seat (200), various sensors can measure body temperature, body fat, pulse, blood pressure, etc. The control unit can receive signals from various sensors to diagnose the user's health condition and adjust the massage pattern or intensity accordingly.

[0094] The body care device (1000) may include a remote control. The remote control may transmit signals to the control unit. The user may operate the remote control to precisely set / control massage movements, massage range, massage location, massage speed, massage intensity, etc.

[0095] A body care device (1000) according to an embodiment of the present invention may include a first link device unit (400), a second link device unit (500), a third link device unit (600), and a reclining drive unit (700).

[0096] The first link device unit (400), the second link device unit (500), and the third link device unit (600) may be provided on the left and right sides of the base frame (100), respectively (see FIG. 2). The first link device unit (400), the second link device unit (500), and the third link device unit (600) may be symmetrical with respect to the YZ plane passing through the center of the first mounting surface (221) and the second mounting surface (321).

[0097] FIG. 4 is a side view of a body care device (1000) according to an embodiment of the present invention, showing a first link device (400) in a first position of a seat frame (210) and a backrest frame (310). The first position may refer to a state in which the backrest (300) is maximally raised. A user can sit on the body care device (1000) in the first position. The user can receive body care in the first position.

[0098] FIG. 5 is a side view of a body care device (1000) according to an embodiment of the present invention, showing the first link device (400) in a second position of the seat frame (210) and the backrest frame (310). The second position may refer to a state in which the backrest (300) is tilted. A user can sit on the body care device (1000) in the second position. The user can receive body care in the second position.

[0099] FIG. 6 is a side view of a body care device (1000) according to an embodiment of the present invention, illustrating the first link device (400) in a third position of the seat frame (210) and the backrest frame (310). The third position may refer to a state in which the backrest (300) is completely lying down. A user can lie down on the body care device (1000) in the third position. The user can receive body care in the third position.

[0100] The first link device unit (400) may be formed of a link device. The link device may refer to a device that connects a plurality of links with joints (pin connections) to perform a certain limited movement. The direction of the limited movement may be parallel to the YZ plane. Each link may be formed in the shape of a bar, a plate, or a block having joints (pin connections) on both sides. Among the plurality of links, a pair of links connected to each other by a joint may be spaced apart from each other in the X-axis direction. Therefore, a pair of links connected to each other by a joint may overlap in the X-axis direction during the limited movement process.

[0101] The first link device unit (400) may include a first link (410), a first fixed link (420), and a first connecting link device unit (430). The first link device unit (400) may be a link device (link work) connected to a base frame (100) to enable forward and backward movement of the first link (410).

[0102] The first fixed link (420) is formed on the base frame (100). The joints (pin joints) on both sides of the first fixed link (420) are spaced apart from each other in the vertical direction. The upper joint of the first fixed link (420) is located behind the lower joint.

[0103] The first link (410) may be a moving link. The first link (410) may be a link parallel to the first fixed link (420). The longitudinal direction of the first link (410) may be parallel to the longitudinal direction of the first fixed link (420). In addition, the first link (410) and the first fixed link (420) may form the same length. The first link (410) and the first fixed link (420) may be axially symmetrical with respect to the X-axis passing through the center of the first link device unit (400).

[0104] The first connecting link device (430) may be a link device (link work) that connects the first fixed link (420) and the first link (410) so that the first link (410) can move forward and backward while the first fixed link (420) and the first link (410) are parallel to each other.

[0105] The first connecting link device (430) may include a first a fixed connecting link (431), a first a moving connecting link (432), a first b fixed connecting link (433), and a first b moving connecting link (434).

[0106] The first fixed connection link (431) may be connected to the upper joint of the first fixed link (420). The upper joint of the first fixed connection link (431) and the upper joint of the first fixed link (420) may refer to the same joint (pin joint).

[0107] The first a motion connection link (432) can connect the lower joint of the first a fixed connection link (431) and the upper joint of the first link (410).

[0108] The first fixed connection link (433) may be connected to the lower joint of the first fixed link (420). The lower joint of the first fixed connection link (433) and the lower joint of the first fixed link (420) may refer to the same joint (pin joint).

[0109] The first b motion connecting link (434) can connect the upper joint of the first b fixed connecting link (433) and the lower joint of the first link (410).

[0110] The first a fixed connection link (431) and the first b movable connection link (434) may be parallel links. The longitudinal direction of the first a fixed connection link (431) may be parallel to the longitudinal direction of the first b movable connection link (434). In addition, the first a fixed connection link (431) and the first b movable connection link (434) may have the same length. The first a fixed connection link (431) and the first b movable connection link (434) may be axially symmetrical with respect to the X-axis passing through the center of the first link device unit (400).

[0111] The first b fixed connection link (433) and the first a movable connection link (432) may be parallel links. The longitudinal direction of the first b fixed connection link (433) may be parallel to the longitudinal direction of the first a movable connection link (432). In addition, the first b fixed connection link (433) and the first a movable connection link (432) may have the same length. The first b fixed connection link (433) and the first a movable connection link (432) may be axially symmetrical with respect to the X-axis passing through the center of the first link device unit (400).

[0112] Accordingly, when the first b fixed connection link (433) rotates around the lower joint of the first fixed link (420), the first link (410) can move in the forward and backward direction while the first fixed link (420) and the first link (410) are parallel to each other. Alternatively, when the first a fixed connection link (431) rotates around the upper joint of the first fixed link (420), the first link (410) can move in the forward and backward direction while the first fixed link (420) and the first link (410) are parallel to each other.

[0113] The first connecting link device unit (430) may include a first a additional connecting link (435) and a first b additional connecting link (436).

[0114] The first a additional connecting link (435) can connect the lower joint of the first a fixed connecting link (431) to one side of the first b movable connecting link (434). The first b additional connecting link (436) can connect the upper joint of the first b movable connecting link (434) to one side of the first a fixed connecting link (431).

[0115] The first b additional connection link (436) may be parallel to the first a additional connection link (435). The longitudinal direction of the first b additional connection link (436) may be parallel to the longitudinal direction of the first a additional connection link (435). In addition, the first b additional connection link (436) and the first a additional connection link (435) may form the same length. The first b additional connection link (436) and the first a additional connection link (435) may be axially symmetrical with respect to the X-axis passing through the center of the first link device unit (400).

[0116] Therefore, the first link (410), the first fixed link (420), the first a fixed connection link (431), the first a movable connection link (432), the first b fixed connection link (433), the first b movable connection link (434), the first a additional connection link (435), and the first b additional connection link (436) can form a rigid parallelogram 8-section link.

[0117] Therefore, when the first b fixed connection link (433) rotates around the lower joint of the first fixed link (420), the first link (410) can move in the forward and backward direction while the first fixed link (420) and the first link (410) are parallel to each other. Alternatively, when the first a fixed connection link (431) rotates around the upper joint of the first fixed link (420), the first link (410) can move in the forward and backward direction while the first fixed link (420) and the first link (410) are parallel to each other. At this time, the first link (410) can be suppressed from moving due to the rigid structure of the parallelogram 8-section link.

[0118] FIG. 7 is a cross-sectional view taken along line AA' of a body care device (1000) according to an embodiment of the present invention (see FIG. 2), which illustrates a second link device (500) in a first position of a seat frame (210) and a backrest frame (310). The first position may refer to a state in which the backrest (300) is maximally raised. A user can sit on the body care device (1000) in the first position. A user can receive body care in the first position.

[0119] FIG. 8 is a cross-sectional view taken along line AA' of a body care device (1000) according to an embodiment of the present invention (see FIG. 2), which illustrates a second link device (500) in a second position of a seat frame (210) and a backrest frame (310). The second position may refer to a state in which the backrest (300) is tilted. A user can sit on the body care device (1000) in the second position. The user can receive body care in the second position.

[0120] FIG. 9 is a cross-sectional view taken along line AA' of a body care device (1000) according to an embodiment of the present invention (see FIG. 2), which illustrates the second link device (500) in a third position of the seat frame (210) and the backrest frame (310). The third position may refer to a state in which the backrest (300) is completely lying down. The user can lie down on the body care device (1000) in the third position. The user can receive body care in the third position.

[0121] The second link device unit (500) may be formed of a link device. The link device may refer to a device that connects a plurality of links with joints (pin connections) to perform a certain limited movement. The direction of the limited movement may be parallel to the YZ plane. Each link may be formed in the shape of a bar, a plate, or a block having joints (pin connections) on both sides. Among the plurality of links, a pair of links connected to each other by a joint may be spaced apart from each other in the X-axis direction. Therefore, a pair of links connected to each other by a joint may overlap in the X-axis direction during the limited movement process.

[0122] The second link device (500) may include a second a link (510), a second seat fixing link (520), a second backrest fixing link (530), and a second b link (540). The second link device (500) may be a link device (link work) that connects the seat frame (210) and the backrest frame (310) so that the backrest frame (310) can stand up or lie back.

[0123] Both joints of the first link (410) and both joints of the second a link (510) may be positioned on the first connecting member (CP1). Accordingly, the second a link (510) may be fixed to the first link (410) and may move together with the first link (410). The first connecting member (CP1) may be manufactured in the form of a flat plate with both sides parallel to the YZ plane.

[0124] The first connecting link device (430) may be a link device (link work) that connects the first fixed link (420) and the first link (410) so that the first link (410) can move forward and backward while the first fixed link (420) and the first link (410) are parallel to each other. Accordingly, even if the first link (410) moves forward and backward by the first connecting link device (430), the second a link (510) may not rotate around the X-axis.

[0125] The second seat fixing link (520) can be formed in the seat frame (210) in parallel with the second a link (510). The second seat fixing link (520) can form a four-section link of a equilibrium quadrilateral together with the second a link (510).

[0126] Even if the first link (410) moves forward and backward by the first connecting link device (430), the second a link (510) may not rotate around the X-axis. Accordingly, even if the first link (410) moves forward and backward by the first connecting link device (430), the second seat fixing link (520) may not rotate around the X-axis. Accordingly, even if the first link (410) moves forward and backward by the first connecting link device (430), the first seating surface (221) may not rotate. Accordingly, even if the postures of the seat portion (200) and the backrest portion (300) change to the first posture, the second posture, and the third posture, a comfortable seating feeling can be provided to a user sitting on the seat portion (200).

[0127] The second backrest fixing link (530) may be formed on the backrest frame (310). The second b link (540) may be parallel to the second backrest fixing link (530). The second b link (540) may form a four-section link of a equilateral quadrilateral together with the second backrest fixing link (530).

[0128] The rear joint of the second a link (510) and the front joint of the second b link (540) may be on the same axis. That is, the rear joint of the second a link (510) and the front joint of the second b link (540) may be formed as one joint (hereinafter referred to as 'first joint (501)').

[0129] The second a link (510) can be rotatably connected to the front joint of the second backrest fixing link (530). That is, the joints on both sides of the second a link (510) and the front joint of the second backrest fixing link (530) can form a three-section link shape. Accordingly, the second a link (510) can rotate around the front joint of the second backrest fixing link (530).

[0130] The second b link (540) can be rotatably connected to the rear joint of the second seat fixing link (520). That is, the joints on both sides of the second b link (540) and the rear joint of the second seat fixing link (520) can form a three-section link shape. Accordingly, the second b link (540) can rotate around the rear joint of the second seat fixing link (520).

[0131] Accordingly, when the second a link (510) rotates around the second seat fixing link (520), the center of rotation (C) of the backrest frame (310) with respect to the seat frame (210) can be located at the user's pelvic area. Accordingly, even if the postures of the seat portion (200) and the backrest portion (300) change to the first posture, the second posture, and the third posture, a comfortable seating feeling can be provided to the user sitting on the seat portion (200).

[0132] In addition, when the second a link (510) rotates around the second seat fixing link (520), the center of rotation (C) of the backrest frame (310) with respect to the seat frame (210) may be located above the first joint (501). Accordingly, in the third posture of the seat portion (200) and the backrest portion (300), the first seating surface (221) and the second seating surface (321) may be parallel to each other. Therefore, complete reclining up to 180° may be possible.

[0133] FIG. 10 is a side view of a body care device (1000) according to an embodiment of the present invention, showing the third link device (600) in a first position of the seat frame (210) and the backrest frame (310). The first position may refer to a state in which the backrest (300) is maximally raised. A user can sit on the body care device (1000) in the first position. The user can receive body care in the first position.

[0134] FIG. 11 is a side view of a body care device (1000) according to an embodiment of the present invention, showing the third link device (600) in a second position of the seat frame (210) and the backrest frame (310). The second position may refer to a state in which the backrest (300) is tilted. The user can sit on the body care device (1000) in the second position. The user can receive body care in the second position.

[0135] FIG. 12 is a side view of a body care device (1000) according to an embodiment of the present invention, illustrating a third link device (600) in a third position of a seat frame (210) and a backrest frame (310). The third position may refer to a state in which the backrest (300) is completely lying down. A user may lie down on the body care device (1000) in the third position. The user may receive body care in the third position.

[0136] The third link device unit (600) may be formed of a link device. The link device may refer to a device that connects a plurality of links with joints (pin connections) to perform a certain limited movement. The direction of the limited movement may be parallel to the YZ plane. Each link may form a bar, plate, or block shape having joints (pin connections) on both sides. Among the plurality of links, a pair of links connected to each other by joints may be spaced apart from each other in the X-axis direction. Therefore, a pair of links connected to each other by joints may overlap in the X-axis direction during the limited movement process.

[0137] The third link device (600) may include a third link (610), a third backrest linkage link (620), and a third device linkage link (630). The third link device (600) may be a link device (link work) that links the movements of the first link device (400) and the second link device (500) so that the backrest frame (310) reclines while the seat frame (210) moves forward.

[0138] The third link (610) can be rotatably coupled to the first shaft (110) of the base frame (100). Both joints of the third link (610) and the first shaft (110) can be positioned on the second connecting member (CP2). The second connecting member (CP2) can be manufactured in the form of a flat plate with both sides parallel to the YZ plane. Both joints of the third link (610) and the first shaft (110) can form a three-section link shape on the second connecting member (CP2).

[0139] The third device-linked link (630) can connect the front joint of the third link (610) to the first b fixed connection link (433). In the first posture, when the third link (610) rotates clockwise around the first axis (110), the first b fixed connection link (433) can rotate counterclockwise by the third device-linked link (630). Therefore, the seat frame (210) can move forward (see FIGS. 11 and 12). Conversely, in the third posture, when the third link (610) rotates counterclockwise around the first axis (110), the first b fixed connection link (433) can rotate clockwise by the third device-linked link (630). Therefore, the seat frame (210) can move backward.

[0140] The third backrest link (620) can connect the rear joint of the third link (610) to the backrest frame (310). In the first posture, when the third link (610) rotates clockwise around the first axis (110), the backrest frame (310) can rotate to lie down (see FIGS. 11 and 12). Conversely, in the third posture, when the third link (610) rotates counterclockwise around the first axis (110), the backrest frame (310) can rotate to stand up.

[0141] The third link device (600) can link the movements of the first link device (400) and the second link device (500) so that the backrest frame (310) lies down backward as the seat frame (210) moves forward. In addition, the third link device (600) can link the movements of the first link device (400) and the second link device (500) so that the backrest frame (310) stands up as the seat frame (210) moves backward. Therefore, since the seat (200) and the backrest (300) are synchronized by a mechanical mechanism without separate electronic control to constantly change into the first posture, the second posture, and the third posture, a comfortable seating feeling can be provided to a user leaning against the backrest while sitting on the seat (200).

[0142] When the posture of the seat part (200) and the backrest part (300) changes from the first posture to the second posture and the third posture, the seat frame (210) moves forward and the backrest frame (310) can lie down backward. When the posture of the seat part (200) and the backrest part (300) changes from the third posture to the second posture and the first posture, the seat frame (210) moves backward and the backrest frame (310) can stand forward. Therefore, when the posture of the seat part (200) and the backrest part (300) changes from the first posture to the second posture and the third posture, the rear end of the backrest part (300) can be positioned within a predetermined distance in the front-back direction. Therefore, reclining can be possible regardless of whether there is free space behind the backrest part (300).

[0143] The reclining drive unit (700) can provide power to the third link device unit (600) so that the seat frame (210) moves forward and the backrest frame (310) reclines backward. The reclining drive unit (700) can rotate the third link (610) around the first axis (110).

[0144] The reclining drive unit (700) may be configured as a linear actuator that is rotatably connected to the first point (S1) of the base frame (100) and the second point (S2) of the third backrest link (620), and that extends between the first point (S1) and the second point (S2).

[0145] The reclining drive unit (700) may be formed of a linear motor having a structure in which a rotary AC motor is extended in a straight line. Alternatively, the reclining drive unit (700) may be formed of a structure using a rotary motor and a rack and pinion mechanism.

[0146] The reclining drive unit (700) may include a fixed portion and a movable portion. The movable portion may move linearly with respect to the fixed portion.

[0147] The first link device unit (400), the second link device unit (500), and the third link device unit (600) may be provided on the left and right sides of the base frame (100), respectively (see FIG. 2).

[0148] The fixed part can be rotatably connected to the first point (S1) of the base frame (100) by a cylindrical shaft (701; shaft) (see FIG. 2). The cylindrical shaft (701) can connect the first points (S1) of the base frame (100) provided on the left and right sides. The longitudinal direction of the cylindrical shaft (701) can be parallel to the X-axis. The first point (S1) can be located at the lower rear part of the base frame (100).

[0149] The movable part can be rotatably coupled to the second point (S2) coupled to the third backrest linkage (620) by a cylindrical shaft (702; shaft) (see FIG. 2). The joints on both sides and the second point (S2) of the third backrest linkage (620) can be located on a third connecting member (CP3). The joints on both sides and the second point (S2) of the third backrest linkage (620) can form a three-section link shape on the third connecting member (CP3). The third connecting member (CP3) can be manufactured in the shape of a flat plate with both sides parallel to the YZ plane. The cylindrical shaft (702) can connect the second points (S2) of the third backrest linkage (620) provided on the left and right sides (see FIG. 2). The longitudinal direction of the cylindrical shaft (702) can be parallel to the X-axis.

[0150] As the movable part moves linearly with respect to the fixed part, the reclining drive part (700) can push or pull the second point (S2) with respect to the first point (S1). Therefore, the reclining drive part (700) can rotate the third link (610) clockwise and counterclockwise around the first axis (110). Therefore, the reclining drive part (700) can provide power to the third link device part (600) so that the seat frame (210) moves forward and the backrest frame (310) lies down. In addition, the reclining drive part (700) can provide power to the third link device part (600) so that the seat frame (210) moves backward and the backrest frame (310) stands up.

[0151]

[0152] While specific embodiments of the present invention have been described and illustrated above, it will be apparent to those skilled in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. Accordingly, such modifications or variations should not be understood individually from the technical spirit or perspective of the present invention, and such modified embodiments should fall within the scope of the claims of the present invention.

[0153] According to the body care device of the present invention, the seat and backrest are synchronized by a mechanical mechanism without separate electronic control, thereby constantly changing into the first, second, and third positions, thereby providing a comfortable seating experience to a user leaning against the backrest while sitting on the seat. Therefore, by overcoming the limitations of existing technologies, the invention is an invention with industrial applicability, as it is not only highly feasible for utilizing related technologies but also for commercializing or selling applicable devices, and is clearly implementable in reality.

Claims

A first link device unit including a first link and connected to a base frame to enable forward and backward movement of the first link; A second link device including a second a link fixed to the first link and connecting the seat frame and the backrest frame so that the backrest frame stands up or lies back; and A third link device unit that links the movements of the first link device unit and the second link device unit so that the backrest frame lies backward as the seat frame moves forward, Body care device. In the first paragraph, Including a reclining drive unit that provides power to a third link device unit so that the backrest frame reclines backward as the seat frame moves forward. Body care device. In the first paragraph, The above second link device unit, A second seat fixed link formed on the seat frame in parallel with the second a link and forming a four-section link of a equilibrium quadrilateral together with the second a link; A second backrest fixing link formed on the above backrest frame; and Including a second b link that is parallel to the second backrest fixing link and forms a four-section link of a equilibrium quadrilateral together with the second backrest fixing link. Body care device. In the third paragraph, The rear joint of the above 2A link and the front joint of the above 2B link are on the same axis. Body care device. In the third paragraph, The above second a link is rotatably connected to the front joint of the second backrest fixed link, The above second b link is rotatably connected to the rear joint of the second seat fixed link. Body care device. In the first paragraph, The above first link device unit, A first fixed link formed on the base frame in parallel with the first link; and Including a first connecting link device unit that connects the first fixed link and the first link so that the first link can move forward and backward in a state parallel to the first fixed link. Body care device. In paragraph 6, The above first connecting link device unit, A first fixed connection link connected to the upper joint of the first fixed link; A first a movable connection link connecting the lower joint of the first a fixed connection link and the upper joint of the first link; A first fixed connection link connected to the lower joint of the first fixed link; and Including a first b movable connection link connecting the upper joint of the first b fixed connection link and the lower joint of the first link, Body care device. In paragraph 7, The above first connecting link device unit, A first additional connecting link connecting the lower joint of the first fixed connecting link to the first movable connecting link; and Including a 1b additional connecting link that is parallel to the 1a additional connecting link and connects the upper joint of the 1b movable connecting link to the 1a fixed connecting link. Body care device. In paragraph 7, The above third link device unit, A third link rotatably coupled to the first axis of the base frame; A third backrest link connecting the rear joint of the third link to the backrest frame; and Including a third device linkage link connecting the front joint of the third link to the first b fixed connection link, Body care device. In paragraph 9, Including a reclining drive unit that rotates the third link around the first axis, Body care device. In Article 10, The reclining drive unit is rotatably connected to the first point of the base frame and the second point of the third backrest link, and is formed by a linear actuator that extends between the first point and the second point. Body care device. In the first paragraph, The first link device unit, the second link device unit, and the third link device unit are respectively provided on the left and right sides of the base frame. Body care device.

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