Body care devices
By combining the first linkage device, the second linkage device, and the third linkage device, the seat frame and backrest frame of the massage chair can move synchronously, solving the problem that existing massage chairs cannot fully recline to 180 degrees, thus improving the user's comfort and convenience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LG ELECTRONICS INC
- Filing Date
- 2025-07-02
- Publication Date
- 2026-07-31
AI Technical Summary
The existing reclining structure of massage chairs cannot fully recline to 180 degrees, which limits the user's comfort and convenience, especially when there is insufficient space behind the backrest.
The system employs a combination of a first linkage device, a second linkage device, and a third linkage device to achieve synchronous movement of the seat frame and the backrest frame through a mechanical mechanism. This allows the backrest frame to be erected or reclined while the seat frame moves back and forth, achieving a 180-degree reclining position.
It enables a smooth transition between the first and third postures of the seat and backrest, providing greater comfort and convenience, especially allowing for full reclining even when there is insufficient space behind the backrest.
Smart Images
Figure CN224572961U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a body care device, and more specifically, to a body care device that provides massage through physical stimulation of the body of a seated user.
[0002] This utility model claims priority to Korean Patent Application KR10-2024-0091668 (July 11, 2024) and Korean Patent Application KR10-2024-0135750 (October 7, 2024). Background Technology
[0003] Recently, with the aging of society, people of all ages and genders are becoming increasingly aware of the importance of health management, maintenance, and promotion. As a result, many people are using facilities such as medical facilities or gyms to manage, maintain, or promote their health.
[0004] In addition to maintaining or promoting health and physical strength, people also make many efforts to recover from fatigue or relieve stress. As a result, various body care devices, such as massage tools, have been developed and are widely used in daily life.
[0005] Massage is a complementary medical therapy that uses hands or special tools to sweep, knead, press, pull, pat, and move the body to help blood circulation and relieve fatigue. Instruments that perform massage based on mechanical devices are called massage devices, and various mechanical components are used in massage devices to ensure effective massage.
[0006] Among them, massage chairs, as electric chairs that provide massage to the body on a seated chair structure, have not only attracted the attention of middle-aged and elderly people and the elderly in recent years, but also office workers suffering from chronic fatigue and stress, as well as young women interested in beauty and weight loss, are gradually paying more and more attention to massage chairs.
[0007] Japanese Patent Publication No. 2024-519174 (hereinafter referred to as "Prior Document 1") discloses a "linkage device, bracket, seat unit, and seat for zero backrest clearance". The aforementioned seat unit includes a base, a linkage mechanism, a bracket side plate, a backrest mechanism, and a backrest.
[0008] The linkage mechanism is rotatably connected between the base and the support side plate. The support side plate is rotatably connected to the backrest mechanism at the backrest point. The backrest mechanism is rotatably connected to both the support side plate and the linkage mechanism. The backrest mechanism includes a backrest mounting component and a backrest linkage component. Both ends of the backrest mounting component are rotatably connected between the backrest point and the backrest linkage component.
[0009] According to the aforementioned existing literature 1, as the backrest tilts backward, the overall height can decrease, but the backrest will not tilt to 180 degrees, so the user can lean back but cannot lie down completely.
[0010] U.S. Patent No. 9433295 (hereinafter referred to as "Prior Document 2") discloses a "Zerowall motorized multi-position recliner chair mechanism", which includes a base rail, a footrest support frame, a backrest support frame, and a seat rail.
[0011] The foot pedal support frame is configured as a fixed link, with the second and third foot pedal actuation links connected to pivot pins on both sides of the fixed link. The second foot pedal actuation link is connected to the first foot pedal actuation link, and the third foot pedal actuation link is connected to the fourth foot pedal actuation link. The third and second foot pedal actuation links are rotatably connected to each other. The foot pedal support frame moves in the fore-and-aft direction via a linkage mechanism consisting of the first, second, third, and fourth foot pedal actuation links. The foot pedal support frame also moves rearward via the linkage mechanism, rising to a position higher than the seat rail.
[0012] According to the aforementioned existing document 2, as the backrest support reclines, the footrest support moves rearward via the aforementioned linkage structure. However, as the footrest support moves rearward and rises to a position higher than the seat rails, the user's feet may rise excessively during reclining. Furthermore, since the backrest support tilts less than 180 degrees, there is a limitation that the user can only lean back and cannot fully recline. Utility Model Content
[0013] The problem to be solved by utility models
[0014] The purpose of this invention is to solve the aforementioned problems existing in body care devices that provide care for the body of seated users.
[0015] Specifically, the purpose of this utility model is to provide a body care device that optimizes the reclining structure so that reclining can be achieved by a drive device regardless of whether there is extra space on the back of the backrest.
[0016] In addition, the purpose of this utility model is to provide a body care device that optimizes the operating structure of the seat and backrest so that it can recline up to 180°.
[0017] In addition, the purpose of this utility model is to provide a body care device that, when using the reclining function, smoothly changes the angle of the seat to provide the user with a comfortable seating experience.
[0018] The technical problems to be solved by this utility model are not limited to those mentioned above. Those skilled in the art can clearly understand from the following description other technical problems not mentioned herein.
[0019] Methods for solving problems
[0020] The body care device described in this application includes:
[0021] The first linkage device includes a first linkage and is connected to the base frame in such a way that the first linkage is movable in the front-rear direction.
[0022] The second linkage device includes a second linkage fixed to the first linkage and connecting the seat frame and the backrest frame, so that the backrest frame can be erected or reclined; and
[0023] The third linkage unit links the movements of the first linkage unit and the second linkage unit so that the seat frame moves forward while the backrest frame reclines backward.
[0024] The body care device described in this application includes a base frame, a seat frame, a backrest frame, a first linkage device, a second linkage device, and a third linkage device.
[0025] The body care device described in this application includes a reclining drive unit that provides power to a third linkage unit so that the seat frame moves forward while the backrest frame reclines backward.
[0026] The second linkage device includes a second seat fixing linkage, a second backrest fixing linkage, and a secondb linkage.
[0027] The second seat fixing link and the second link (2a) are formed side by side in the seat frame. Together, the second seat fixing link and the second link (2a) form a four-section link in a parallelogram shape.
[0028] The second backrest fixing link is formed in the backrest frame.
[0029] Link 2b is parallel to the second backrest fixed link. Link 2b and the second backrest fixed link together form a four-section link in the shape of a parallelogram.
[0030] The rear joint of link 2a and the front joint of link 2b are located on the same axis.
[0031] Link 2a can be rotatably connected to the front joint of the second backrest fixing link.
[0032] Link 2b can be rotatably coupled to the rear joint of the second seat fixing link.
[0033] The first linkage assembly includes a first fixed linkage and a first connecting linkage assembly.
[0034] The first fixed link is formed side by side with the first link in the base frame.
[0035] The first connecting rod device connects the first fixed link and the first link, so that the first link can move in the front-back direction when the first link and the first fixed link are side by side.
[0036] The first connecting rod device includes a first fixed connecting rod, a first movable connecting rod, a first fixed connecting rod, and a first movable connecting rod.
[0037] The 1a fixed connecting rod is connected to the upper joint of the first fixed connecting rod.
[0038] The 1a movable connecting rod connects the lower joint of the 1a fixed connecting rod to the upper joint of the first connecting rod.
[0039] The 1b fixed connecting rod is connected to the lower joint of the first fixed connecting rod.
[0040] The 1b movable connecting rod connects the upper joint of the 1b fixed connecting rod and the lower joint of the first connecting rod.
[0041] The first connecting rod device includes an additional connecting rod 1a and an additional connecting rod 1b.
[0042] The additional connecting rod 1a connects the lower connector of the fixed connecting rod 1a to the movable connecting rod 1b.
[0043] Additional connecting rod 1b is placed side by side with additional connecting rod 1a. Additional connecting rod 1b connects the upper connector of movable connecting rod 1b to fixed connecting rod 1a.
[0044] The third linkage device includes a third linkage, a third backrest linkage, and a third device linkage.
[0045] The third link can be rotatably connected to the first axis of the base frame.
[0046] The third backrest linkage connects the rear joint of the third linkage to the backrest frame.
[0047] The third device unit's connecting rod connects the front connector of the third connecting rod to the 1b fixed connecting rod.
[0048] The inclined drive unit causes the third link to rotate around the first axis.
[0049] The reclining drive unit is rotatably coupled to a first point on the base frame and a second point on the third backrest linkage. The reclining drive unit consists of a linear actuator that extends and retracts between the first and second points.
[0050] The first linkage device, the second linkage device, and the third linkage device are respectively located on the left and right sides of the base frame.
[0051] Effects of the utility model
[0052] According to an embodiment of the present invention, the third linkage device can link the movements of the first and second linkage devices so that the seat frame moves forward while the backrest frame reclines backward. Furthermore, the third linkage device can link the movements of the first and second linkage devices so that the seat frame moves backward while the backrest frame stands upright. Therefore, without additional electronic control, the seat and backrest operate synchronously via a mechanical mechanism, thereby changing into a first, second, and third posture according to certain rules. This provides a comfortable seating experience for the user leaning against the backrest while seated.
[0053] According to an embodiment of the present invention, in the body care device, when the posture of the seat and backrest changes from a first posture to a second and a third posture, the seat frame moves forward while the backrest frame reclines backward. When the posture of the seat and backrest changes from a third posture to a second and a first posture, the seat frame moves backward while the backrest frame stands upright forward. Therefore, when the posture of the seat and backrest changes from the first posture to the second and a third posture, the rear end of the backrest can be located within a predetermined distance in the front-back direction. Thus, reclining can be achieved regardless of whether there is sufficient space behind the backrest.
[0054] According to an embodiment of the present invention, the body care device includes a first connecting link assembly that connects a first fixed link and a first link, allowing the first link to move in the front-back direction when the first fixed link and the first link are side-by-side. Therefore, even if the first link moves in the front-back direction via the first connecting link assembly, the second link will not rotate around the X-axis. A second seat fixing link is formed side-by-side with the second link in the seat frame. The second seat fixing link and the second link together form a four-section parallelogram link. Even if the first link moves in the front-back direction via the first connecting link assembly, the second link will not rotate around the X-axis. Therefore, even if the first link moves in the front-back direction via the first connecting link assembly, the second seat fixing link will not rotate around the X-axis. Therefore, even if the first link moves in the front-back direction via the first connecting link assembly, the first resting surface will not rotate. Therefore, even if the posture of the seat and backrest changes to the first, second, and third postures, it can still provide a comfortable seating experience for the user sitting in the seat.
[0055] According to an embodiment of the present invention, the body care device comprises a first connecting rod, a first fixed connecting rod, a first fixed connecting rod, a first a movable connecting rod, a first b fixed connecting rod, a first b movable connecting rod, a first a supplementary connecting rod, and a first b supplementary connecting rod, forming a robust parallelogram-shaped eight-section connecting rod. Therefore, when the first b fixed connecting rod rotates about the lower joint of the first fixed connecting rod, the first connecting rod can move in the front-back direction when the first fixed connecting rod and the first connecting rod are side-by-side. Alternatively, when the first a fixed connecting rod rotates about the upper joint of the first fixed connecting rod, the first connecting rod can move in the front-back direction when the first fixed connecting rod and the first connecting rod are side-by-side. In this case, the first connecting rod is prevented from moving due to the robust structure of the eight-section parallelogram connecting rod.
[0056] According to an embodiment of the present invention, in the body care device, a second backrest fixing link is formed on the backrest frame. Link 2b is arranged side-by-side with the second backrest fixing link. Link 2b and the second backrest fixing link together form a four-section link in the shape of a parallelogram. The rear joint of link 2a and the front joint of link 2b can be located on the same axis. That is, the rear joint of link 2a and the front joint of link 2b can be formed by a single joint (hereinafter referred to as the 'first joint'). Link 2a is rotatably connected to the front joint of the second backrest fixing link. That is, the two side joints of link 2a and the front joint of the second backrest fixing link can form a three-section link configuration. Therefore, link 2a can rotate around the front joint of the second backrest fixing link. Link 2b is rotatably connected to the rear joint of the second seat fixing link. That is, the two side joints of link 2b and the rear joint of the second seat fixing link can form a three-section link configuration. Therefore, the 2b link can rotate around the rear joint of the second seat fixing link. Thus, when the 2a link rotates around the second seat fixing link, the rotation center of the backrest frame, with the seat frame as a reference, can be located at the user's pelvic area. Therefore, even if the posture of the seat and backrest changes to the first, second, and third postures, a comfortable seating experience can be provided to the user seated in the seat.
[0057] According to an embodiment of the present invention, in the body care device, when the second link rotates around the second seat fixing link, the rotation center of the backrest frame is located above the first joint, with the seat frame as a reference. Therefore, in the third posture of the seat and backrest, the first and second resting surfaces can be placed side by side. Thus, it can be fully reclined up to 180°. Attached Figure Description
[0058] Figure 1 The perspective view of the body care device, which is an embodiment of the present invention viewed from the front and upper side, shows the backrest frame tilted and erected.
[0059] Figure 2 This is a front view of the body care device of an embodiment of the present invention, viewed from the front.
[0060] Figure 3 The perspective view of the body care device, which is an embodiment of the present invention viewed from the front and top, shows the backrest frame reclined.
[0061] Figure 4 The side view of the body care device, as an embodiment of the present invention, shows the first linkage device portion when the seat frame and backrest frame are in a first posture.
[0062] Figure 5The side view of the body care device, as an embodiment of the present invention, shows the first linkage device portion when the seat frame and backrest frame are in a second posture.
[0063] Figure 6 The side view of the body care device, as an embodiment of the present invention, shows the first linkage device portion when the seat frame and backrest frame are in a third posture.
[0064] Figure 7 A-A' cross-sectional view of the body care device as an embodiment of this utility model (refer to...) Figure 2 This is a diagram showing the second linkage device when the seat frame and backrest frame are in the first position.
[0065] Figure 8 A-A' cross-sectional view of the body care device as an embodiment of this utility model (refer to...) Figure 2 (This is a diagram showing the second linkage device when the seat frame and backrest frame are in the second position.)
[0066] Figure 9 A-A' cross-sectional view of the body care device as an embodiment of this utility model (refer to...) Figure 2 (This is a diagram showing the second linkage device when the seat frame and backrest frame are in the third position.)
[0067] Figure 10 The side view of the body care device, as an embodiment of the present invention, shows the third linkage device portion when the seat frame and backrest frame are in a first posture.
[0068] Figure 11 The side view of the body care device, as an embodiment of the present invention, shows the third linkage device when the seat frame and backrest frame are in a second posture.
[0069] Figure 12 The side view of the body care device, as an embodiment of the present invention, shows the third linkage device when the seat frame and backrest frame are in a third posture.
[0070] Explanation of reference numerals in the attached figures
[0071] 1000: Body care device
[0072] 100: Base frame; 110: First axis
[0073] 200: Seating section; 210: Seating frame
[0074] 220: Seat cover 221: First shelf surface
[0075] 300: Backrest 310: Backrest Frame
[0076] 320: Backrest cover; 321: Second shelf surface
[0077] 400: First link assembly 410: First link
[0078] 420: First fixed link; 430: First connecting link device.
[0079] 431: Fixed connecting rod 1a; 432: Movable connecting rod 1a
[0080] 433: Fixed connecting rod 1b; 434: Movable connecting rod 1b
[0081] 435: Add a connecting rod to section 1a. 436: Add a connecting rod to section 1b.
[0082] 500: Second connecting rod assembly; 501: First joint
[0083] 510: Link 2a; 520: Second seat fixing link
[0084] 530: Second backrest fixing link; 540: 2b link
[0085] 600: Third Linkage Device 610: Third Link
[0086] 620: Third backrest linkage; 630: Third device linkage.
[0087] 700: Inclined drive unit C: Rotation center
[0088] CP1: First connecting component; CP2: Second connecting component
[0089] CP3: Third connecting component; S1: First point
[0090] S2: Second point Detailed Implementation
[0091] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. However, in describing the present invention, well-known functions or structures will be omitted in order to clearly understand the essence of the present invention.
[0092] In the embodiments of this utility model, the X, Y, and Z directions are mutually orthogonal. The X and Y directions are parallel to the horizontal direction, and the Z direction is parallel to the vertical direction. When the X direction is parallel to the left-right direction, the Y direction is parallel to the front-back direction. When the X direction is parallel to the front-back direction, the Y direction is parallel to the left-right direction.
[0093] Below, the front side indicates the direction shown by the X-axis arrow, and the back side indicates the opposite side of the X-axis arrow. Below, the top side indicates the direction shown by the Z-axis arrow, and the bottom side indicates the opposite side of the Z-axis arrow.
[0094] Figure 1 A perspective view of the body care device 1000, an embodiment of the present invention, viewed from the front and upper side, shows the backrest frame 310 tilted and erected.
[0095] Figure 2 This is a front view of the body care device 1000 of an embodiment of the present invention, viewed from the front.
[0096] Figure 3 The perspective view of the body care device 1000, an embodiment of the present invention, viewed from the front and upper side, shows the backrest frame 310 in a reclined state.
[0097] The body care device 1000 of this utility model can be a massage chair that provides care to the body of a seated user.
[0098] The body care device 1000 of this utility model includes a base frame 100, a seat 200 and a backrest 300.
[0099] When using the body care device 1000, the seat 200 can support the lower body, including the user's buttocks. The length of the seat 200 in the front-to-back direction is longer than its width in the left-to-right direction.
[0100] The seat section 200 includes a seat frame 210 and a seat cover 220.
[0101] The seat frame 210 forms the skeleton of the seat section 200. The seat frame 210 has a generally rectangular shape. The seat frame 210 is made by joining multiple angle pipes and sheet metal together. The seat frame 210 may be made of metal and / or plastic.
[0102] The seat frame 210 supports the lower body, including the user's buttocks. The length of the seat frame 210 in the front-to-back direction is longer than its width in the left-to-right direction.
[0103] The seat cover 220 is attached to the seat frame 210. The seat cover 220 forms a first resting surface 221. The first resting surface 221 refers to the surface that rests on the lower body, including the user's buttocks. The seat cover 220 may be made of plastic, cloth, natural leather, and / or artificial leather.
[0104] Seat unit 200 includes seat massage unit.
[0105] The seat massage unit is attached to the seat frame 210 and / or seat cover 220 below the first resting surface 221. The seat massage unit massages the lower body, including the user's buttocks, which are resting on the first resting surface 221. The first resting surface 221 may include soft materials such as cloth, natural leather, and / or artificial leather. The seat massage unit applies techniques such as patting, kneading, rolling, and acupressure to the user's lower body through the first resting surface 221.
[0106] The body care device 1000 includes a control unit. The control unit controls the seat massage unit.
[0107] When using the body care device 1000, the backrest 300 supports the upper body, including the user's head, neck, back, and waist. The length of the backrest 300 in the vertical direction is longer than its width in the horizontal direction.
[0108] The backrest 300 includes a backrest frame 310 and a backrest cover 320.
[0109] The backrest frame 310 forms the skeleton of the backrest 300. The backrest frame 310 has a generally rectangular shape. The backrest frame 310 is made by joining multiple corner tubes and panels together. The backrest frame 310 may be made of metal and / or plastic.
[0110] The backrest cover 320 is attached to the backrest frame 310. The front surface of the backrest cover 320 forms a second resting surface 32. The second resting surface 321 refers to the surface that rests on the upper body, including the user's back and waist. The backrest cover 320 may be made of plastic, cloth, natural leather, and / or artificial leather.
[0111] The 300mm backrest includes a backrest massage section.
[0112] The backrest massage unit is attached to the backrest frame 310 and / or backrest cover 320 on the rear side of the second rest surface 321. The backrest massage unit massages the upper body, including the back and waist of the user resting on the second rest surface 321. The second rest surface 321 may include soft materials such as cloth, natural leather, and / or artificial leather. The backrest massage unit applies techniques such as patting, kneading, rolling, and acupressure to the user's upper body through the second rest surface 321.
[0113] The body care device 1000 includes a control unit. The control unit controls the backrest massage unit.
[0114] The base frame 100 supports the load of the seat 200 and backrest 300 on the ground. The length of the base frame 100 in the front-to-back direction is longer than its width in the left-to-right direction.
[0115] The base frame 100 is generally rectangular. The base frame 100 is formed by joining multiple corner tubes and plates together. The base frame 100 may be made of metal and / or plastic.
[0116] The body care device 1000 includes various sensors. When the user sits on the seat 200, the sensors detect this. The control unit receives the signals from the sensors and automatically starts operating.
[0117] When the user sits in the seat 200, various sensors detect body temperature, body fat, pulse, blood pressure, etc. The control unit receives signals from various sensors to diagnose the user's health status, thereby adjusting the massage mode or intensity.
[0118] The body care device 1000 includes a remote control. The remote control sends signals to the control unit. The user operates the remote control to precisely set / control the massage operation, massage range, massage position, massage speed, massage intensity, etc.
[0119] The body care device 1000 of this utility model includes a first linkage device 400, a second linkage device 500, a third linkage device 600, and a tilting drive unit 700.
[0120] The first link device 400, the second link device 500, and the third link device 600 are respectively disposed on the left and right sides of the base frame 100 (see reference). Figure 2 The first link assembly 400, the second link assembly 500, and the third link assembly 600 are symmetrical about each other with reference to the YZ plane passing through the middle of the first support surface 221 and the second support surface 321.
[0121] Figure 4 The side view of the body care device 1000, an embodiment of this utility model, shows the first linkage device 400 when the seat frame 210 and backrest frame 310 are in a first posture. The first posture refers to the state in which the backrest 300 is maximally upright. The user can sit in the body care device 1000 in the first posture. The user can receive body care in the first posture.
[0122] Figure 5 The side view of the body care device 1000, an embodiment of this utility model, shows the first linkage device 400 when the seat frame 210 and backrest frame 310 are in a second posture. The second posture refers to the state in which the backrest 300 is tilted upright. In the second posture, the user can sit in the body care device 1000. The user can receive body care in the second posture.
[0123] Figure 6A side view of the body care device 1000, an embodiment of this utility model, shows the first linkage device 400 when the seat frame 210 and backrest frame 310 are in a third position. The third position refers to the state where the backrest 300 is fully reclined. The user can lie on the body care device 1000 in the third position. The user can receive body care in the third position.
[0124] The first linkage unit 400 is composed of a link work (link assembly). A link work is a device that connects multiple links via joints (pin connections) to restrict movement. The direction of the restricted movement can be parallel to the YZ plane. Each link is formed as a bar, plate, or block with joints (pin connections) on both sides. Among the multiple links, a pair of links connected by joints are spaced apart in the X-axis direction. Therefore, a pair of links connected by joints overlaps in the X-axis direction during the restricted movement.
[0125] The first linkage device 400 includes a first link 410, a first fixed link 420, and a first connecting link device 430. The first linkage device 400 can be a linkage device connected to the base frame 100 in a manner in which the first link 410 is movable in the front-rear direction.
[0126] The first fixed link 420 is formed in the base frame 100. The two side joints (pin connections) 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 positioned further back than the lower joint.
[0127] The first link 410 is a movable link. The first link 410 is a link parallel to the first fixed link 420. The length direction of the first link 410 is parallel to the length direction of the first fixed link 420. Furthermore, the first link 410 and the first fixed link 420 are of the same length. The first link 410 and the first fixed link 420 are axially symmetrical about each other with respect to the X-axis passing through the center of the first link assembly 400.
[0128] The first connecting link device 430 is a link work that connects the first fixed link 420 and the first link 410 so that the first link 410 can move in the front-back direction when the first fixed link 420 and the first link 410 are side by side.
[0129] The first connecting rod device 430 includes a first a fixed connecting rod 431, a first a movable connecting rod 432, a first b fixed connecting rod 433, and a first b movable connecting rod 434.
[0130] The first fixed connecting rod 431 is connected to the upper connector of the first fixed connecting rod 420. The upper connector of the first fixed connecting rod 431 and the upper connector of the first fixed connecting rod 420 represent the same connector (pin connection).
[0131] The first movable connecting rod 432 connects the lower joint of the first fixed connecting rod 431 and the upper joint of the first connecting rod 410.
[0132] The first fixed connecting rod 433 is connected to the lower connector of the first fixed connecting rod 420. The lower connector of the first fixed connecting rod 433 and the lower connector of the first fixed connecting rod 420 represent the same connector (pin connection).
[0133] The 1b movable connecting rod 434 connects the upper joint of the 1b fixed connecting rod 433 and the lower joint of the first connecting rod 410.
[0134] The first fixed connecting link 431 and the first movable connecting link 434 are side-by-side links. The length direction of the first fixed connecting link 431 is parallel to the length direction of the first movable connecting link 434. Furthermore, the first fixed connecting link 431 and the first movable connecting link 434 are of the same length. The first fixed connecting link 431 and the first movable connecting link 434 are axially symmetrical about each other with respect to the X-axis passing through the center of the first link assembly 400.
[0135] The first fixed connecting link 433 (1b) and the first movable connecting link 432 (1a) are parallel connecting links. The length direction of the first fixed connecting link 433 is parallel to the length direction of the first movable connecting link 432 (1a). Furthermore, the first fixed connecting link 433 and the first movable connecting link 432 are of the same length. The first fixed connecting link 433 and the first movable connecting link 432 are axially symmetrical about each other with respect to the X-axis passing through the center of the first connecting link assembly 400.
[0136] Therefore, when the first fixed connecting rod 433 rotates around the lower joint of the first fixed connecting rod 420, the first connecting rod 410 can move in the front-back direction when the first fixed connecting rod 420 and the first connecting rod 410 are side by side. Alternatively, when the first fixed connecting rod 431 rotates around the upper joint of the first fixed connecting rod 420, the first connecting rod 410 can move in the front-back direction when the first fixed connecting rod 420 and the first connecting rod 410 are side by side.
[0137] The first connecting rod device 430 includes an additional connecting rod 435 (1a) and an additional connecting rod 436 (1b).
[0138] Additional connecting rod 435 (1a) connects the lower connector of fixed connecting rod 431 (1a) to one side of movable connecting rod 434 (1b). Additional connecting rod 436 (1b) connects the upper connector of movable connecting rod 434 (1b) to one side of fixed connecting rod 431 (1a).
[0139] Additional connecting link 436 (1b) is arranged side-by-side with additional connecting link 435 (1a). The length direction of additional connecting link 436 (1b) is parallel to the length direction of additional connecting link 435 (1a). Furthermore, additional connecting link 436 (1b) and additional connecting link 435 (1a) are of the same length. Additional connecting link 436 (1b) and additional connecting link 435 (1a) are axially symmetrical about each other with respect to the X-axis passing through the center of the first connecting rod assembly 400.
[0140] Therefore, the first link 410, the first fixed link 420, the first a fixed connecting link 431, the first a movable connecting link 432, the first b fixed connecting link 433, the first b movable connecting link 434, the first a supplementary connecting link 435, and the first b supplementary connecting link 436 form a robust parallelogram-shaped eight-section link.
[0141] Therefore, when the first fixed connecting rod 433 rotates around the lower joint of the first fixed connecting rod 420, the first connecting rod 410 can move in the front-back direction when the first fixed connecting rod 420 and the first connecting rod 410 are side by side. Alternatively, when the first fixed connecting rod 431 rotates around the upper joint of the first fixed connecting rod 420, the first connecting rod 410 can move in the front-back direction when the first fixed connecting rod 420 and the first connecting rod 410 are side by side. In this case, the first connecting rod 410 is prevented from moving due to the robust structure of the eight parallelogram-shaped connecting rods.
[0142] Figure 7 A-A' cross-sectional view of the body care device 1000 as an embodiment of the present invention (refer to...) Figure 2 This diagram shows the second linkage device 500 when the seat frame 210 and backrest frame 310 are in a first posture. The first posture refers to the state where the backrest 300 is maximally upright. In this first posture, the user can sit on the body care device 1000 and receive body care.
[0143] Figure 8 A-A' cross-sectional view of the body care device 1000 as an embodiment of the present invention (refer to...) Figure 2This diagram shows the second linkage device 500 when the seat frame 210 and backrest frame 310 are in a second posture. The second posture refers to the state in which the backrest 300 is tilted upright. In this second posture, the user can sit on the body care device 1000 and receive body care.
[0144] Figure 9 A-A' cross-sectional view of the body care device 1000 as an embodiment of the present invention (refer to...) Figure 2 This is a diagram of the second linkage device 500 when the seat frame 210 and backrest frame 310 are in the third position. The third position refers to the state where the backrest 300 is fully reclined. In the third position, the user can lie on the body care device 1000 and receive body care.
[0145] The second linkage unit 500 is composed of a linkage assembly. A linkage assembly is a device that connects multiple links via joints (pin connections) to restrict movement. The direction of the restricted movement is parallel to the YZ plane. Each link is formed as a bar, plate, or block with joints (pin connections) on both sides. A pair of links connected by joints are spaced apart in the X-axis direction. Therefore, a pair of links connected by joints can overlap in the X-axis direction during the restricted movement.
[0146] The second linkage device 500 includes a second a linkage 510, a second seat fixing linkage 520, a second backrest fixing linkage 530, and a second b linkage 540. The second linkage device 500 is a linkage device that connects the seat frame 210 and the backrest frame 310 in such a way that the backrest frame 310 is erected or reclined.
[0147] The two side joints of the first link 410 and the two side joints of the second link 510 are located on the first connecting member CP1. Therefore, the second link 510 is fixed to the first link 410 and moves together with the first link 410. The two sides of the first connecting member CP1 are made into a flat plate shape parallel to the YZ plane.
[0148] The first connecting link device 430 is a link work that connects the first fixed link 420 and the first link 410, so that the first link 410 can move in the front-back direction when the first fixed link 420 and the first link 410 are side by side. Therefore, even if the first link 410 is moved in the front-back direction by the first connecting link device 430, the second link 510 will not rotate around the X-axis.
[0149] The second seat fixing link 520 and the second a link 510 are formed side by side in the seat frame 210. The second seat fixing link 520 and the second a link 510 together form a four-section link in a parallelogram shape.
[0150] Even if the first link 410 moves in the front-to-back direction via the first connecting link device 430, the second link 510 will not rotate around the X-axis. Therefore, even if the first link 410 moves in the front-to-back direction via the first connecting link device 430, the second seat fixing link 520 will not rotate around the X-axis. Therefore, even if the first link 410 moves in the front-to-back direction via the first connecting link device 430, the first resting surface 221 will not rotate. Therefore, even if the posture of the seat 200 and the backrest 300 changes to the first posture, the second posture, and the third posture, a comfortable seating experience can be provided to the user sitting in the seat 200.
[0151] The second backrest fixing link 530 is formed on the backrest frame 310. The second b link 540 is parallel to the second backrest fixing link 530. Together with the second backrest fixing link 530, the second b link 540 forms a four-section link in a parallelogram shape.
[0152] The rear connector of the second-a link 510 and the front connector of the second-b link 540 can be located on the same axis. That is, the rear connector of the second-a link 510 and the front connector of the second-b link 540 can be formed by a single connector (hereinafter referred to as 'first connector 501').
[0153] The second link 510 is rotatably connected to the front joint of the second backrest fixing link 530. That is, the two side joints of the second link 510 and the front joint of the second backrest fixing link 530 form a three-section link configuration. Therefore, the second link 510 can rotate about the front joint of the second backrest fixing link 530.
[0154] The second b link 540 is rotatably connected to the rear joint of the second seat fixing link 520. That is, the two side joints of the second b link 540 and the rear joint of the second seat fixing link 520 form a three-section link configuration. Therefore, the second b link 540 can rotate about the rear joint of the second seat fixing link 520.
[0155] Therefore, when the second link 510 rotates around the second seat fixing link 520, the rotation center C of the backrest frame 310 is located at the user's pelvic area, with the seat frame 210 as the reference. Therefore, even if the posture of the seat 200 and the backrest 300 changes to the first posture, the second posture, and the third posture, a comfortable seating experience can be provided to the user sitting in the seat 200.
[0156] Furthermore, when the second link 510 rotates around the second seat fixing link 520, the rotation center C of the backrest frame 310 is located above the first joint 501, with the seat frame 210 as a reference. Therefore, when the seat portion 200 and the backrest 300 are in the third posture, the first resting surface 221 and the second resting surface 321 can be placed side by side. Thus, it can be fully reclined up to 180°.
[0157] Figure 10 The side view of the body care device 1000, an embodiment of this utility model, shows the third linkage device 600 when the seat frame 210 and backrest frame 310 are in a first posture. The first posture refers to the state in which the backrest 300 is maximally upright. The user can sit in the body care device 1000 in the first posture. The user can receive body care in the first posture.
[0158] Figure 11 The side view of the body care device 1000, an embodiment of this utility model, shows the third linkage device 600 when the seat frame 210 and backrest frame 310 are in a second posture. The second posture refers to the state in which the backrest 300 is tilted upright. In the second posture, the user can sit on the body care device 1000. The user can receive body care in the second posture.
[0159] Figure 12 The side view of the body care device 1000, an embodiment of this utility model, shows the third linkage device 600 when the seat frame 210 and backrest frame 310 are in a third position. The third position refers to the state where the backrest 300 is fully reclined. In the third position, the user can lie on the body care device 1000. The user can receive body care in the third position.
[0160] The third linkage unit 600 is composed of a link work. A link work is a device that connects multiple links via joints (pin connections) to restrict movement. The direction of the restricted movement is parallel to the YZ plane. Each link is formed as a bar, plate, or block with joints (pin connections) on both sides. A pair of links connected to each other by joints are spaced apart in the X-axis direction. Therefore, a pair of links connected by joints can overlap in the X-axis direction during the restricted movement.
[0161] The third linkage device 600 includes a third link 610, a third backrest linkage 620, and a third device linkage 630. The third linkage device 600 can be a linkage device that links the movements of the first linkage device 400 and the second linkage device 500, so that the seat frame 210 moves forward while the backrest frame 310 reclines backward.
[0162] The third link 610 is rotatably connected to the first shaft 110 of the base frame 100. The two side joints of the third link 610 and the first shaft 110 are located on the second connecting member CP2. Both sides of the second connecting member CP2 are made into a flat plate shape parallel to the YZ plane. The two side joints of the third link 610 and the first shaft 110 form a three-section link shape on the second connecting member CP2.
[0163] The third device linkage 630 connects the front connector of the third linkage 610 to the first b fixed connection linkage 433. In the first posture, when the third linkage 610 rotates clockwise around the first axis 110, the first b fixed connection linkage 433 can rotate counterclockwise via the third device linkage 630. Therefore, the seat frame 210 can move forward (see reference). Figure 11 and Figure 12 Conversely, in the third posture, when the third link 610 rotates counterclockwise around the first axis 110, the first fixed connecting link 433 rotates clockwise via the third device part connecting link 630. Therefore, the seat frame 210 can move backward.
[0164] The third backrest linkage 620 connects the rear joint of the third linkage 610 to the backrest frame 310. In the first posture, when the third linkage 610 rotates clockwise around the first axis 110, it can be rotated to cause the backrest frame 310 to recline backward (see reference). Figure 11 and Figure 12 Conversely, in the third posture, when the third link 610 rotates counterclockwise around the first axis 110, it can rotate to make the backrest frame 310 stand upright.
[0165] The third linkage 600 can link the movements of the first linkage 400 and the second linkage 500 so that the seat frame 210 moves forward while the backrest frame 310 reclines backward. Additionally, the third linkage 600 can link the movements of the first linkage 400 and the second linkage 500 so that the seat frame 210 moves backward while the backrest frame 310 is erected. Therefore, without additional electronic control, the seat 200 and the backrest 300 perform synchronized operation via a mechanical mechanism, changing into a first, second, and third posture according to certain rules, providing a comfortable seating experience for the user sitting in the seat 200 and leaning against the backrest.
[0166] When the posture of the seat 200 and backrest 300 changes from a first posture to a second and a third posture, the seat frame 210 moves forward while the backrest frame 310 can recline backward. When the posture of the seat 200 and backrest 300 changes from a third posture to a second and a first posture, the seat frame 210 moves backward while the backrest frame 310 can stand upright forward. Therefore, when the posture of the seat 200 and backrest 300 changes from a first posture to a second and a third posture, the rear end of the backrest 300 is within a predetermined distance in the front-back direction. Therefore, reclining can be achieved regardless of whether there is extra space behind the backrest 300.
[0167] The reclining drive unit 700 provides power to the third linkage device 600 so that the seat frame 210 moves forward while the backrest frame 310 reclines backward. The reclining drive unit 700 enables the third linkage 610 to rotate about the first axis 110.
[0168] The reclining drive unit 700 is composed of a linear actuator that is rotatably coupled to a first point S1 of the base frame 100 and a second point S2 of the third backrest linkage 620, thereby extending and retracting between the first point S1 and the second point S2.
[0169] The tilting drive unit 700 is composed of a linear motor, which is a structure that stretches a rotary AC motor in a straight line. Alternatively, the tilting drive unit 700 is composed of a structure that uses a rotary motor and a rack and pinion mechanism.
[0170] The tilting drive unit 700 includes a fixed part and a movable part. The movable part moves linearly with respect to the fixed part.
[0171] The first link device 400, the second link device 500, and the third link device 600 are respectively disposed on the left and right sides of the base frame 100 (see reference). Figure 2 ).
[0172] The fixing part is rotatably coupled to the first point S1 of the base frame 100 via the cylindrical shaft 701 (see reference). Figure 2 The cylindrical shaft 701 can be connected to the first point S1 of the base frame 100 located on the left and right sides. The length direction of the cylindrical shaft 701 is parallel to the X-axis. The first point S1 is located at the lower rear side of the base frame 100.
[0173] The movable part is rotatably connected to the second point S2 (see reference) of the third backrest linkage 620 via the cylindrical shaft 702. Figure 2 The two side joints and the second point S2 of the third backrest linkage 620 are located on the third connecting member CP3. The two side joints and the second point S2 of the third backrest linkage 620 form a three-section linkage on the third connecting member CP3. The two sides of the third connecting member CP3 are made into a flat plate shape parallel to the YZ plane. The cylindrical shaft 702 can connect to the second point S2 of the third backrest linkage 620 located on the left and right sides (see reference). Figure 2 The length direction of the cylindrical shaft 702 is parallel to the X-axis.
[0174] The movable part moves linearly with the fixed part as a reference, thereby causing the reclining drive unit 700 to push or pull the second point S2 with the first point S1 as a reference. Therefore, the reclining drive unit 700 rotates the third link 610 clockwise and counterclockwise around the first axis 110. Thus, the reclining drive unit 700 provides power to the third link device 600 so that the seat frame 210 moves forward while the backrest frame 310 reclines backward. Furthermore, the reclining drive unit 700 provides power to the third link device 600 so that the seat frame 210 moves backward while the backrest frame 310 stands upright.
[0175] The above description and illustrations illustrate specific embodiments of the present invention. However, the present invention is not limited to the embodiments described herein. Those skilled in the art will understand that various modifications and variations can be made to the present invention without departing from its spirit and scope. Therefore, such modifications or variations should not be understood independently of the technical concept or viewpoint of the present invention, and the modified embodiments should fall within the scope of the present invention.
Claims
1. A body care device, characterized in that It includes: The first linkage device includes a first linkage and is connected to the base frame in such a way that the first linkage is movable in the front-rear direction. The second linkage device includes a second linkage fixed to the first linkage and connecting the seat frame and the backrest frame, so that the backrest frame can be erected or reclined; and The third linkage unit links the movements of the first linkage unit and the second linkage unit so that the seat frame moves forward while the backrest frame reclines backward.
2. A body care device according to claim 1, characterized in that It includes: The reclining drive unit provides power to the third linkage device unit so that the seat frame moves forward while the backrest frame reclines backward.
3. The body care device according to claim 1, characterized in that, The aforementioned second linkage device includes: The second seat fixing link is formed in the seat frame side by side with the aforementioned link 2a, and together with the aforementioned link 2a, forms a four-section link in a parallelogram shape. The second backrest fixing link is formed in the aforementioned backrest frame; and Link 2b is parallel to the second backrest fixing link mentioned above, and together with the second backrest fixing link, forms a four-section link in a parallelogram shape.
4. The body care device according to claim 3, characterized in that, The rear joint of the aforementioned link 2a and the front joint of the aforementioned link 2b are located on the same axis.
5. The body care device according to claim 3, characterized in that, The aforementioned second a link can be rotatably connected to the front joint of the aforementioned second backrest fixing link. The aforementioned 2b link can be rotatably connected to the rear joint of the aforementioned second seat fixing link.
6. The body care device according to claim 1, characterized in that, The aforementioned first linkage device includes: A first fixed link is formed parallel to the aforementioned first link in the aforementioned base frame; and The first connecting rod device connects the first fixed link and the first link so that the first link can move in the front-back direction when the first link and the first fixed link are side by side.
7. The body care device according to claim 6, characterized in that, The aforementioned first connecting rod device includes: The first fixed connecting rod is connected to the upper joint of the first fixed connecting rod mentioned above; The 1a movable connecting rod connects the lower joint of the 1a fixed connecting rod and the upper joint of the first connecting rod. The first fixed connecting rod is connected to the lower joint of the first fixed connecting rod; and The 1b movable connecting rod connects the upper joint of the 1b fixed connecting rod and the lower joint of the first connecting rod.
8. The body care device according to claim 7, characterized in that, The aforementioned first connecting rod device includes: An additional connecting rod 1a connects the lower connector of the fixed connecting rod 1a to the movable connecting rod 1b. The 1b additional connecting rod is placed alongside the 1a additional connecting rod, and the upper connector of the 1b movable connecting rod is connected to the 1a fixed connecting rod.
9. The body care device according to claim 7, characterized in that, The aforementioned third linkage device includes: The third link is rotatably connected to the first axis of the aforementioned base frame; The third backrest linkage connects the rear joint of the aforementioned third linkage to the aforementioned backrest frame; and The third device unit is a connecting rod that connects the front connector of the third connecting rod to the first fixed connecting rod.
10. A body care device in accordance with claim 9, characterized by It includes: The inclined drive unit causes the third link to rotate about the first axis.