Chair structure

Abstract

The invention provides a chair structure. The chair structure comprises a chair frame, a chair body and a leg lifting mechanism, the chair body is arranged on the chair frame and comprises a hip support, a thigh support and a shank support. The leg lifting mechanism comprises a leg driving assembly and a leg connecting rod module. The leg connecting rod module comprises a shank connecting rod group and a thigh connecting rod group. The shank connecting rod group is pivoted to the shank support and driven by the leg driving assembly, the shank connecting rod group comprises a driving rod, and one end of the driving rod is pivoted to the leg driving assembly. The thigh connecting rod group is pivoted to the thigh bracket and the shank connecting rod group; the thigh connecting rod group comprises a thigh driving rod; therefore, by arranging the leg lifting mechanism and lifting the thigh support, the use comfort can be improved.

Description

TECHNICAL FIELD

[0001] The present invention relates to a chair structure, and more particularly to a chair structure with adjustable posture. BACKGROUND

[0002] Chair structures are widely used in daily life. In order to improve the flexibility and comfort of the chair structure, the known chair structure is provided with a driving assembly. The driving assembly drives the components of the chair structure to pivot at a specific angle, thereby changing the posture of the chair structure, such as lifting the lower leg, to meet the needs of the user.

[0003] However, the known chair structure has limited movable components, which cannot meet the ergonomics, and the comfort of the chair structure needs to be improved.

[0004] Therefore, how to adjust the chair structure to improve the comfort and flexibility has become the goal pursued by the relevant industry. SUMMARY

[0005] The present invention provides a chair structure that can improve the comfort and flexibility of the chair structure through the configuration of the structure.

[0006] According to an embodiment of the present invention, a chair structure is provided. The chair structure includes a chair frame, a chair body, and a leg lifting mechanism. The chair body is arranged on the chair frame and includes a hip support, a thigh support, and a lower leg support. The thigh support is pivotally connected to the hip support. The lower leg support is pivotally connected to the thigh support. The leg lifting mechanism includes a leg driving assembly and a leg linkage module. The leg driving assembly is arranged on the chair frame. The leg linkage module includes a lower leg linkage group and a thigh linkage group. The lower leg linkage group is pivotally connected to the lower leg support and is driven by the leg driving assembly. The lower leg linkage group includes a driving rod, one end of which is pivotally connected to the leg driving assembly. The thigh linkage group is pivotally connected to the thigh support and the lower leg linkage group. The thigh linkage group includes a thigh driving rod. When the leg driving assembly drives the lower leg linkage group, the lower leg linkage group is lifted, the driving rod pivots the thigh driving rod, allowing the lower leg linkage group to drive the thigh linkage group and lift the thigh support. In this way, by arranging the leg lifting mechanism in the chair structure, the hip support, the thigh support, and the lower leg support can be pivotally connected to each other, so that the posture of the chair structure can meet the ergonomics, thereby improving the comfort of the chair structure, and the flexibility of the chair structure can be further improved.

[0007] According to the chair structure of the foregoing embodiment, the lower leg linkage group can further include an anti-pinch rod and a linkage rod. The anti-pinch rod is pivotally connected to the lower leg support. The linkage rod is pivotally connected between the anti-pinch rod and the other end of the driving rod.

[0008] The chair structure according to the foregoing embodiment, wherein the thigh linkage group further comprises a resilient assembly, one end of the resilient assembly is pivotally connected to the chair frame, and the other end of the resilient assembly is pivotally connected to the thigh driving rod.

[0009] The chair structure according to the foregoing embodiment, further comprising a base, a chair frame, and a backrest driving mechanism. The chair body further comprises a backrest support and a backrest support rod. The backrest support is pivotally connected to the hip support. The backrest support rod is pivotally connected between the chair frame and the backrest support. The chair frame is disposed on the base and comprises a sliding rail. The chair frame is movably disposed on the sliding rail. The backrest driving mechanism is disposed on the chair frame and can comprise a backrest driving assembly and a screw rod. The backrest driving assembly is disposed on the chair frame. The screw rod is screwed to the chair frame and is driven to rotate by the backrest driving assembly. The backrest driving assembly drives the screw rod to slide the chair frame along a length extension direction of the sliding rail, while changing the included angle between the chair frame and the backrest support.

[0010] The chair structure according to the foregoing embodiment, further comprising a movable plate and a vertical driving mechanism. The vertical driving mechanism can comprise a vertical driving assembly, a vertical driving wheel, and a vertical eccentric game lever. The vertical driving assembly is disposed on the base. The vertical driving wheel is coupled to the vertical driving assembly. The vertical eccentric game lever is pivotally connected to the vertical driving wheel. The movable plate is connected to the vertical eccentric game lever. The chair frame is pivotally connected to the movable plate. The vertical driving wheel is driven to rotate by the vertical driving assembly to drive the vertical eccentric game lever to vertically vibrate the movable plate and the chair frame. The chair structure according to the foregoing embodiment, further comprising a horizontal driving mechanism. The horizontal driving mechanism can comprise a horizontal driving assembly, a horizontal driving wheel, and a horizontal eccentric game lever. The horizontal driving assembly is disposed on the movable plate. The horizontal driving wheel is coupled to the horizontal driving assembly. One end of the horizontal eccentric game lever is pivotally connected to the horizontal driving wheel, and the other end of the horizontal eccentric game lever is pivotally connected to the chair frame. The horizontal driving wheel is driven to rotate by the horizontal driving assembly to drive the horizontal eccentric game lever to horizontally vibrate the chair frame. According to another embodiment of the present application, a chair structure is provided. The chair structure comprises a chair frame, a chair body, and a leg lifting mechanism. The chair body is disposed on the chair frame and comprises a hip support, a thigh support, and a calf support. The thigh support is pivotally connected to the hip support. The calf support is pivotally connected to the thigh support. The leg lifting mechanism is disposed on the chair frame and comprises a leg driving assembly and a leg linkage module. The leg driving assembly is disposed on the chair frame. The leg linkage module is pivotally connected between the leg driving assembly, the thigh support, and the calf support and is driven by the leg driving assembly. When the leg driving assembly drives the leg linkage module, the leg linkage module is lifted, and the thigh support and the calf support are lifted, so that the thigh support is pivoted relative to the hip support.

[0011] According to the chair structure of the preceding embodiment, the leg link module can include a calf link group and a thigh link group. The calf link group can include a driving rod, an anti-pinch rod, and a connecting rod. One end of the driving rod is pivotally connected to the leg driving assembly. The anti-pinch rod is pivotally connected to the calf support. The connecting rod is pivotally connected between the anti-pinch rod and the other end of the driving rod. The thigh link group includes a thigh driving rod. When the leg driving assembly drives the driving rod to lift the calf support to a first position, the thigh link group is not driven and is located at an initial position. When the leg driving assembly drives the driving rod to lift the calf support from the first position to a second position, the driving rod can pivot the thigh driving rod to allow the thigh support to pivot relative to the hip support to move to a lifted position.

[0012] According to the chair structure of the preceding embodiment, the chair structure can further include a base, a chair frame, and a chair back driving mechanism. The chair body can further include an armrest support, an armrest support rod, a back support, and a back support rod. The armrest support is pivotally connected to the chair frame. The armrest support rod is pivotally connected between the armrest support and the chair frame. The back support is pivotally connected to the hip support. The back support rod is pivotally connected between the chair frame and the back support. The chair frame is arranged on the base and includes a sliding rail. The chair frame is movably arranged on the sliding rail. The chair back driving mechanism is arranged on the chair frame and includes a chair back driving assembly and a screw rod. The chair back driving assembly is arranged on the chair frame. The screw rod is screwed to the chair frame and is driven to rotate by the chair back driving assembly. The chair back driving assembly can drive the screw rod to make the chair frame slide along a length direction of the sliding rail, and simultaneously change the included angle between the chair frame and the back support and the included angle between the chair frame and the armrest support.

[0013] According to the chair structure of the preceding embodiment, the chair structure can further include a movable plate and a vertical driving mechanism. The vertical driving mechanism can include a vertical driving assembly, a vertical driving wheel, and a vertical eccentric game lever. The vertical driving assembly is arranged on the base. The vertical driving wheel is coupled to the vertical driving assembly. The vertical eccentric game lever is pivotally connected to the vertical driving wheel. The movable plate is connected to the vertical eccentric game lever. The chair frame is pivotally connected to the movable plate. The vertical driving wheel can be driven to rotate by the vertical driving assembly to drive the vertical eccentric game lever to drive the movable plate and the chair frame to vibrate vertically. According to the chair structure of the preceding embodiment, the chair structure can further include a horizontal driving mechanism. The horizontal driving mechanism can include a horizontal driving assembly, a horizontal driving wheel, and a horizontal eccentric game lever. The horizontal driving assembly is arranged on the movable plate. The horizontal driving wheel is coupled to the horizontal driving assembly. One end of the horizontal eccentric game lever is pivotally connected to the horizontal driving wheel, and the other end is pivotally connected to the chair frame. The horizontal driving wheel can be driven to rotate by the horizontal driving assembly to drive the horizontal eccentric game lever to drive the chair frame to vibrate horizontally. According to the chair structure of the preceding embodiment, the chair frame can include a frame bottom. The frame bottom is adjacent to the base. The horizontal driving mechanism can further include a horizontal swing arm. The horizontal swing arm is pivotally connected to the frame bottom and the horizontal eccentric game lever, so that the horizontal driving mechanism drives the chair frame to vibrate horizontally. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 This is a perspective view of a chair structure according to the first embodiment of the present invention;

[0015] Figure 2 yes Figure 1 An exploded view of a portion of the chair structure in the first embodiment;

[0016] Figure 3 yes Figure 1 Another exploded view of the chair structure in the first embodiment;

[0017] Figure 4 yes Figure 1 A side view of the chair structure of the first embodiment in the first lying position;

[0018] Figure 5 yes Figure 1 A side view of the chair structure of the first embodiment in the second lying position;

[0019] Figure 6 yes Figure 1 A schematic diagram of the separated portion of the chair structure in the first embodiment, including a movable plate, a vertical drive mechanism, a horizontal drive mechanism, and a base.

[0020] Figure 7 yes Figure 1 A three-dimensional schematic diagram of the vertical drive mechanism and base of the first embodiment;

[0021] Figure 8 yes Figure 1 A three-dimensional schematic diagram of the horizontal drive mechanism and base of the first embodiment;

[0022] Figure 9 yes Figure 1 Side view of the movable plate, vertical drive mechanism, horizontal drive mechanism and base of the first embodiment;

[0023] Figure 10 This is a partial side view of a chair structure according to a second embodiment of the present invention;

[0024] Figure 11 This is a partial side view of a chair structure according to a third embodiment of the present invention; and

[0025] Figure 12 This is a partial side view of a chair structure according to a fourth embodiment of the present invention.

[0026] Figure label:

[0027] 1000: Chair Structure

[0028] 1100: Chair body

[0029] 1110, 2110, 3110: Hip support

[0030] 1120, 2120, 3120: Thigh brace

[0031] 1130, 2130, 3130: Lower leg support

[0032] 1131: Lower leg support frame

[0033] 1132: Lower leg transverse bar

[0034] 1133: Lower leg longitudinal bar

[0035] 1140: Back Support

[0036] 1141: Back support frame

[0037] 1142: Back Horizontal Bar

[0038] 1143: Back longitudinal bar

[0039] 1150: Back support bar

[0040] 1160: Handrail support

[0041] 1170: Handrail support bar

[0042] 1200: Chair Frame

[0043] 1210: Chair frame

[0044] 1220: Chair frame pivot

[0045] 1230: Sliding horizontal bar

[0046] 1240: Driving Department

[0047] 1250: Sliding part

[0048] 1260: Chair frame support rod

[0049] 1300: Leg lifting mechanism

[0050] 1310: Leg drive assembly

[0051] 1320, 2320, 3320: Leg linkage module

[0052] 1321: Lower leg connecting rod group

[0053] 1321a, 2321a, 3321a, 4321a: Drive rod

[0054] 1321b, 2321b, 3321b: Anti-pinch bar

[0055] 1321c, 2321c, 3321c, 4321c: Linkage rod

[0056] 1321d: Pushing Horizontal Rod

[0057] 1322: Thigh Linkage Group

[0058] 1322a, 2322a, 3322a, 4322a: Thigh-driven lever

[0059] 1322b: Resilient Component

[0060] 1322c, 2322c, 3322c, 4322c: Thigh connecting rod

[0061] 1322d: Limit pin

[0062] 1400: Base

[0063] 1500: Chair Frame

[0064] 1510: Slide rail

[0065] 1520: Bottom of the frame

[0066] 1600: Chair back drive mechanism

[0067] 1610: Chair back drive assembly

[0068] 1620: Screw

[0069] 1700: Vertical Drive Mechanism

[0070] 1710: Vertical Drive Component

[0071] 1720: Vertical drive wheel

[0072] 1730: Vertical Eccentric Joystick

[0073] 1750: Vertical drive shaft

[0074] 1760: Vertical Swing Arm

[0075] 1770: Vertical limiting component

[0076] 1780: Vertical drive component

[0077] 1800: Horizontal drive mechanism

[0078] 1810: Horizontal Drive Component

[0079] 1820: Horizontal drive wheel

[0080] 1830: Horizontal Eccentric Joystick

[0081] 1840: Torque-enhanced wheel

[0082] 1850: Belt

[0083] 1860: Horizontal drive shaft

[0084] 1870: Horizontal Swing Arm

[0085] 1900: Movable Plate

[0086] X, Y, Z: Axes Detailed Implementation

[0087] Please see Figure 1 and Figure 2 , Figure 1 This is a perspective view of a chair structure 1000 according to the first embodiment of the present invention. Figure 2 yes Figure 1 A partially exploded view of a chair structure 1000 according to a first embodiment. The chair structure 1000 includes a chair frame 1200, a chair body 1100, and a leg lifting mechanism 1300. The chair body 1100 is disposed on the chair frame 1200 and includes a hip support 1110, a thigh support 1120, and a calf support 1130. The thigh support 1120 is pivotally connected to the hip support 1110. The calf support 1130 is pivotally connected to the thigh support 1120. The leg lifting mechanism 1300 is disposed on the chair frame 1200 and includes a leg drive assembly 1310 and a leg linkage module 1320. The leg drive assembly 1310 is disposed on the chair frame 1200. The leg linkage module 1320 is pivotally connected between the leg drive assembly 1310, the thigh support 1120, and the calf support 1130, and is driven by the leg drive assembly 1310. When the leg drive assembly 1310 drives the leg linkage module 1320, it raises the leg linkage module 1320 and raises the thigh support 1120 and the calf support 1130, causing the thigh support 1120 and the calf support 1130 to pivot relative to the hip support 1110.

[0088] By incorporating a leg lifting mechanism 1300 into the chair structure 1000, the hip support 1110, thigh support 1120, and calf support 1130 can pivot relative to each other, thereby enabling the chair structure 1000 to achieve an ergonomic posture and zero-gravity effect. This enhances the comfort of using the chair structure 1000 and further improves its flexibility.

[0089] The hip support 1110, thigh support 1120, and calf support 1130 each have a rectangular frame structure. The hip support 1110 and calf support 1130 are pivotally connected to the two sides of the thigh support 1120 along an X-axis, respectively. Therefore, the hip support 1110, thigh support 1120, and calf support 1130 can respectively provide support for a user's hip, thigh, and calf. The calf support 1130 may include a calf support frame 1131, two calf transverse bars 1132, two calf longitudinal bars 1133, and a central bar (not shown). Each calf transverse bar 1132 is parallel to a Y-axis and connected to the calf support frame 1131. The two calf longitudinal bars 1133 are parallel to each other and connected between the two calf transverse bars 1132. The central bar connects the lower calf transverse bar 1132 and the calf support frame 1131. In other embodiments, the hip support, thigh support, and calf support may be any other structure that allows a user to place their hips, thighs, and calves, and is not limited thereto.

[0090] The leg linkage module 1320 may include a lower leg linkage group 1321 and a thigh linkage group 1322. The thigh linkage group 1322 is pivotally connected to the thigh support 1120 and the lower leg linkage group 1321, and the lower leg linkage group 1321 is pivotally connected to the lower leg support 1130 and driven by the leg drive assembly 1310. The lower leg linkage group 1321 may include a drive rod 1321a. One end of the drive rod 1321a is pivotally connected to the leg drive assembly 1310. The thigh linkage group 1322 includes a thigh drive rod 1322a, and the thigh drive rod 1322a corresponds to the drive rod 1321a. When the lower leg linkage group 1321 is raised, the drive rod 1321a causes the thigh drive rod 1322a to pivot, allowing the lower leg linkage group 1321 to drive the thigh linkage group 1322 to raise the thigh support 1120 together.

[0091] Specifically, the chair frame 1200 includes a chair frame body 1210 and a chair frame pivot 1220, with the pivot 1220 connected to the side of the chair frame body 1210 near the lower leg support 1130. The drive rod 1321a includes two plates (not shown) and a push plate (not shown), with the two plates connected to the push plate to form a pivot space (not shown), and the drive rod 1321a is generally L-shaped and divided into a longer first section and a shorter second section. The lower leg linkage group 1321 may further include a push transverse rod 1321d, the middle position of which can be pivotally connected to the leg drive assembly 1310, and one end of which can be connected to the middle position of the first section of the drive rod 1321a. One end of the chair frame pivot 1220 can be pivotally connected to the top of the first section of the drive rod 1321a, and the top of the second section of the drive rod 1321a can be pivotally connected to the lower leg support 1130. Since the top of the first section of the drive rod 1321a is pivotally connected to the chair frame 1200, when the leg drive assembly 1310 operates to push the push-up transverse rod 1321d, it can drive the drive rod 1321a to rotate around the top of the first section as a pivot point, thereby raising the lower leg support 1130.

[0092] The lower leg linkage group 1321 may further include an anti-pinch rod 1321b and a connecting rod 1321c. The anti-pinch rod 1321b is pivotally connected to the lower leg support 1130. The connecting rod 1321c is pivotally connected between the other end of the anti-pinch rod 1321b and the drive rod 1321a. The anti-pinch rod 1321b may be pivotally connected to the lower leg longitudinal rod 1133 of the lower leg support 1130. When the lower leg support 1130 is obstructed by foreign objects such as hands or feet during descent, the anti-pinch rod 1321b can rotate around its pivot point with the connecting rod 1321c, thereby preventing the user from being pinched when the lower leg linkage group 1321 is activated.

[0093] The thigh linkage group 1322 may further include a thigh connecting rod 1322c, which is connected between the thigh driving rod 1322a and the thigh support 1120. As shown in Figure 2, the thigh driving rod 1322a can be placed in the pivot space, and one end of the thigh driving rod 1322a is pivotally connected to the first section of the drive rod 1321a. In an initial state, there is a gap between the lower end of the thigh driving rod 1322a and the push plate of the drive rod 1321a. When the leg drive assembly 1310 pushes the push transverse rod 1321d to pivot the drive rod 1321a, the gap between the push plate and the lower end of the thigh driving rod 1322a decreases. Then, the push plate can contact the thigh driving rod 1322a, causing the thigh driving rod 1322a to pivot upward in conjunction with the thigh connecting rod 1322c, thereby raising the thigh support 1120. The thigh linkage group 1322 may further include an elastic component 1322b and a limiting pin 1322d. One end of the elastic component 1322b is pivotally connected to the chair frame 1200, and one end of the limiting pin 1322d is pivotally connected to the thigh drive rod 1322a, while the other end is pivotally connected to the other end of the elastic component 1322b. When the leg drive assembly 1310 drives the drive rod 1321a to rise against the thigh drive rod 1322a, the elastic component 1322b is stretched by the linkage and accumulates elastic potential energy. When the leg drive assembly 1310 drives the drive rod 1321a to fall, the thigh drive rod 1322a returns to the pivoting space of the drive rod 1321a through the elastic potential energy of the elastic component 1322b. In the first embodiment, the elastic component 1322b may be a cylindrical spring, but is not limited thereto. Furthermore, in the first embodiment, the number of components such as the drive rod 1321a, the anti-pinch rod 1321b, the linkage rod 1321c, the thigh drive rod 1322a, the elastic component 1322b, the thigh connecting rod 1322c, and the limiting pin 1322d are all two and are mirror images, and are not limited to the above disclosure.

[0094] Please see Figure 3 See also Figure 1 and Figure 2 , Figure 3 yes Figure 1 Another exploded view of the chair structure 1000 of the first embodiment. The chair structure 1000 may further include a base 1400, a chair frame 1500, and a backrest drive mechanism 1600. The chair frame 1500 is disposed on the base 1400 and includes a slide rail 1510. The chair frame 1200 is movably disposed on the slide rail 1510. The chair body 1100 may further include an armrest bracket 1160, an armrest support rod 1170, a backrest bracket 1140, and a backrest support rod 1150. The armrest bracket 1160 is pivotally connected to the chair frame 1500. The armrest support rod 1170 is pivotally connected between the armrest bracket 1160 and the chair frame 1200. The backrest bracket 1140 is pivotally connected to the chair frame 1200. The backrest support rod 1150 is pivotally connected between the chair frame 1500 and the backrest bracket 1140.

[0095] Specifically, the base 1400 may be square, and the chair frame 1500 may include a frame bottom 1520 and four links. The frame bottom 1520 is adjacent to the base 1400 and pivotally connected to the lower end of the four links. One slide rail 1510 is fixed to two of the four links, and another slide rail 1510 is fixed to the other two of the four links. The length extension direction of each slide rail 1510 is parallel to the X-axis.

[0096] The back support 1140 has a rectangular frame structure and is pivotally connected to the other side of the hip support 1110 along the X-axis, allowing the user to lean against it. The back support 1140 includes a back support frame 1141, three transverse back bars 1142, and two longitudinal back bars 1143. Each transverse back bar 1142 is parallel to the Y-axis and spaced apart from the back support frame 1141. The longitudinal back bars 1143 are parallel to each other and connected between the two lower transverse back bars 1142. In other embodiments, the back support can be any other structure that allows the user to lean against it, and is not limited thereto. Furthermore, there can be two back support bars 1150, and each back support bar 1150 can be pivotally connected between each longitudinal back bar 1143 and the chair frame 1500. The number of armrest brackets 1160 and armrest support rods 1170 can be two. Each armrest bracket 1160 can be a curved rod. One end of each armrest bracket 1160 is pivotally connected to the chair frame 1500. Each armrest support rod 1170 is pivotally connected to the middle section of each armrest bracket 1160.

[0097] The backrest drive mechanism 1600 is disposed on the chair frame 1500 and includes a backrest drive assembly 1610 and a screw 1620. The backrest drive assembly 1610 is disposed on the chair frame 1500. The screw 1620 is screwed to the chair frame 1200 and is driven to rotate by the backrest drive assembly 1610. The backrest drive assembly 1610 can drive the screw 1620, causing the chair frame 1200 to slide along the length extension direction of the slide rail 1510, while simultaneously changing the angle between the chair frame 1200 and the backrest support 1140 and the angle between the chair frame 1200 and the armrest support 1160.

[0098] The chair frame 1200 may further include a sliding transverse bar 1230, a driving part 1240, two sliding parts 1250, and two chair frame support bars 1260. The sliding transverse bar 1230 is connected to the chair frame body 1210. The driving part 1240 is disposed on the sliding transverse bar 1230 and includes threads corresponding to the screw 1620. The two sliding parts 1250 are respectively disposed at both ends of the sliding transverse bar 1230. Each sliding part 1250 includes a sliding space (not shown), and each sliding space allows each slide rail 1510 to be movably inserted therein. Each chair frame support bar 1260 is pivotally connected between the front end of the chair frame 1500 and the front end of the chair frame 1200. The lower ends of the two armrest support bars 1170 may be pivotally disposed at both ends of the sliding transverse bar 1230, and the buttock support 1110 is disposed on the sliding transverse bar 1230.

[0099] The backrest drive assembly 1610 drives the screw 1620 to rotate, thereby rotating the drive unit 1240 and causing the chair frame 1200 and chair body 1100 to slide relative to the chair frame 1500 along the two slide rails 1510. In this way, the chair frame 1200 drives the hip support 1110 forward, causing the lower end of the back support 1140 to move along the X-axis. The back support 1140 is also pulled clockwise by the back support rod 1150, allowing the chair body 1100 to recline. Simultaneously, the lower ends of each armrest support rod 1170 move with the chair frame 1200, and each armrest support 1160 is lifted by the pull of the armrest support rod 1170, allowing the chair body 1100 to raise its armrests. Furthermore, each chair frame support rod 1260 is pulled counterclockwise by the chair frame 1200, consequently causing the hip support 1110 and thigh support 1120 on the chair frame 1200 to rotate to a horizontal position. In the first embodiment, the hip support 1110 and thigh support 1120 can rotate from 0 degrees to 5 degrees under the traction of each chair frame support rod 1260. Therefore, the hip support 1110 has an inclination angle of about 5 degrees when sitting and about 0 degrees when lying down, but is not limited to this.

[0100] Please see Figure 4 and Figure 5 See also Figures 1 to 3 , Figure 4 yes Figure 1 A side view of the chair structure 1000 of the first embodiment in a first reclining state. Figure 5 yes Figure 1 The first embodiment of the chair structure 1000 is shown as a side view in the second reclining state. The two figures above are merely examples of two usage states; in actual use, the bending angles of the back support 1140, thigh support 1120, and lower leg support 1130 in the chair structure 1000 can be adjusted according to user needs, and are not limited thereto. Furthermore, although... Figure 4 and Figure 5The diagram simultaneously shows the back support 1140 lying flat and the thigh support 1120 and calf support 1130 raised. However, it is also possible for the back support 1140 not to lie flat, with only the thigh support 1120 and calf support 1130 raised. This is not a limitation.

[0101] The backrest drive assembly 1610 can drive the backrest support 1140 and armrest support 1160 to achieve reclining and armrest raising actions. The leg drive assembly 1310 can drive each drive rod 1321a to raise the lower leg support 1130 to a first position, while the thigh linkage group 1322 remains stationary in an initial position, thus achieving... Figure 4 The chair structure 1000 is in its first reclining state. If the leg drive assembly 1310 continuously drives each drive rod 1321a to lift the lower leg support 1130 from the first position to a second position, each drive rod 1321a can cause each thigh drive rod 1322a to pivot, allowing the thigh support 1120 to pivot relative to the hip support 1110, thus moving to a raised position and achieving... Figure 5 The second reclining state of the chair structure 1000. Therefore, the difference between the first reclining state and the second reclining state lies in whether each drive rod 1321a pushes each thigh drive rod 1322a to pivot the thigh support 1120 relative to the hip support 1110 when each drive rod 1321a lifts the lower leg support 1130. The user can adjust the chair structure 1000 to the first reclining state or the second reclining state as needed.

[0102] Please see Figure 6 , Figure 6 yes Figure 1 A partial schematic diagram of the chair structure 1000 of the first embodiment, showing a movable plate 1900, a vertical drive mechanism 1700, a horizontal drive mechanism 1800, and a base 1400 separated. The chair structure 1000 may further include the movable plate 1900, the vertical drive mechanism 1700, and the horizontal drive mechanism 1800. The vertical drive mechanism 1700 is disposed on the base 1400 and can cause the movable plate 1900 and the chair frame 1500 to vibrate vertically. The horizontal drive mechanism 1800 is disposed on the base 1400 and can cause the chair frame 1500 to vibrate horizontally.

[0103] Please see Figures 7 to 9 See also Figure 6 , Figure 7 yes Figure 1 A perspective view of the vertical drive mechanism 1700 and the base 1400 of the first embodiment. Figure 8 yes Figure 1 A perspective view of the horizontal drive mechanism 1800 and the base 1400 of the first embodiment. Figure 9 yes Figure 1A side view of the movable plate 1900, vertical drive mechanism 1700, horizontal drive mechanism 1800, and base 1400 of the first embodiment. It should be noted that... Figure 7 Details of the horizontal drive mechanism 1800 and related components are omitted. Figure 8 Details of the vertical drive mechanism 1700 and related aspects are omitted, but this is not intended to limit the invention.

[0104] The vertical drive mechanism 1700 includes a vertical drive assembly 1710, a vertical drive wheel 1720, and a vertical eccentric joystick 1730. The vertical drive assembly 1710 is disposed on the base 1400. The vertical drive wheel 1720 is coupled to the vertical drive assembly 1710. The vertical eccentric joystick 1730 is pivotally connected to the vertical drive wheel 1720. The movable plate 1900 is driven to rotate by the vertical drive assembly 1710, thereby driving the vertical eccentric joystick 1730 to cause the movable plate 1900 and the chair frame 1500 to vibrate vertically along a Z-axis direction.

[0105] Specifically, the vertical drive mechanism 1700 may further include a vertical drive shaft 1750, a vertical swing arm 1760, a vertical limiting member 1770, and a vertical driving member 1780. The vertical drive shaft 1750 is connected to the vertical driving wheel 1720. One end of the vertical eccentric joystick 1730 is eccentrically pivoted to one end of the vertical drive shaft 1750. The vertical limiting member 1770 is limited to the base 1400. The vertical swing arm 1760 is pivotally connected to the vertical limiting member 1770, and its two ends are respectively pivotally connected to the vertical driving member 1780 and the other end of the vertical eccentric joystick 1730. The vertical driving member 1780 may be further pivotally connected to the movable plate 1900. In this way, the vertical eccentric joystick 1730 can be driven by the vertical drive assembly 1710 to rotate eccentrically, thereby causing the movable plate 1900 to vibrate vertically along the Z-axis. It should be noted that the number of vertical eccentric joystick 1730, vertical swing arm 1760, vertical limiting member 1770, and vertical driving member 1780 can all be two, and they are arranged in a mirror image. The horizontal drive mechanism 1800 may further include a horizontal drive assembly 1810, a horizontal drive wheel 1820, and a horizontal eccentric joystick 1830. The horizontal drive assembly 1810 is disposed on the movable plate 1900. The horizontal drive wheel 1820 is coupled to the horizontal drive assembly 1810. One end of the horizontal eccentric joystick 1830 is pivotally connected to the horizontal drive wheel 1820, and the other end is pivotally connected to the chair frame 1500. The horizontal drive wheel 1820 can be driven to rotate by the horizontal drive assembly 1810 to drive the horizontal eccentric joystick 1830 to cause the chair frame 1500 to vibrate horizontally.

[0106] Specifically, the horizontal drive mechanism 1800 may further include a torque-enhancing wheel 1840, a belt 1850, and a horizontal drive shaft 1860. The torque-enhancing wheel 1840 includes a first wheel portion (not shown) and a second wheel portion (not shown) coaxially. The diameter of the first wheel portion is larger than the diameter of the second wheel portion. The first wheel portion is coupled to the horizontal drive assembly 1810, and the second wheel portion is coupled to the horizontal drive wheel 1820 via the belt 1850. The horizontal drive shaft 1860 is connected to the horizontal drive wheel 1820, and the horizontal eccentric joystick 1830 is pivotally mounted on one end of the horizontal drive shaft 1860. Thus, the horizontal eccentric joystick 1830 can be eccentrically actuated to drive the chair frame 1500 to vibrate horizontally along the X-axis direction.

[0107] The horizontal drive mechanism 1800 may further include a horizontal swing arm 1870, with a horizontal eccentric joystick 1830 pivotally mounted between the two ends of the horizontal swing arm 1870. One end of the horizontal swing arm 1870 is disposed on the movable plate 1900, and the other end is pivotally connected to the frame bottom 1520. When the horizontal drive assembly 1810 is actuated, the horizontal swing arm 1870 will use its connection point with the movable plate 1900 as a pivot point, causing the frame bottom 1520 to vibrate horizontally along the X-axis relative to this pivot point. In this way, the chair frame 1500 can drive the chair frame 1200 and the chair body 1100 to vibrate horizontally along the X-axis. The number of horizontal eccentric joysticks 1830 and horizontal swing arms 1870 may both be two, and they are arranged in a mirror image.

[0108] Please see Figure 10 , Figure 10 This is a partial side view of a chair structure according to a second embodiment of the present invention. For the sake of brevity, only a portion of the chair structure (not shown) is shown in the second embodiment to indicate the differences, but it is not intended to be limiting. The chair structure of the second embodiment is similar to the chair structure 1000 of the first embodiment, including a leg linkage module 2320. The lower leg linkage group (not shown) of the leg linkage module 2320 includes two drive rods 2321a, two anti-pinch rods 2321b, and two connecting rods 2321c. Only the differences will be described below, while the similarities will not be described again.

[0109] In the second embodiment, described from one side, the thigh linkage group (not shown) of the leg linkage module 2320 includes a thigh driving rod 2322a and a thigh connecting rod 2322c pivotally connected to each other. The thigh driving rod 2322a is pivotally connected between the connecting rod 2321c and the thigh connecting rod 2322c. When the leg drive assembly (not shown) drives the leg linkage module 2320, the connecting rod 2321c drives the thigh driving rod 2322a and the thigh connecting rod 2322c together, causing the thigh support 2120 to pivot relative to the hip support 2110 and the calf support 2130 to pivot relative to the thigh support 2120.

[0110] Please see Figure 11 ,Figure 11 This is a partial side view of a chair structure according to a third embodiment of the present invention. For the sake of brevity, only a portion of the chair structure (not shown) is shown in the third embodiment to indicate the differences, but it is not intended to be limiting. The chair structure of the third embodiment is similar to the chair structure 1000 of the first embodiment and includes a leg linkage module 3320. The lower leg linkage group (not shown) of the leg linkage module 3320 includes two drive rods 3321a, two anti-pinch rods 3321b, and two connecting rods 3321c. Only the differences will be described below, while the similarities will not be described again.

[0111] In the third embodiment, described from one side, the thigh linkage group (not shown) of the leg linkage module 3320 includes a thigh driving rod 3322a and a thigh connecting rod 3322c pivotally connected to each other. The thigh driving rod 3322a is pivotally connected between the driving rod 3321a and the thigh connecting rod 3322c, and the pivot point of the thigh driving rod 3322a is different from the pivot point of the connecting rod 3321c. When the leg drive assembly (not shown) drives the leg linkage module 3320, the driving rod 3321a drives the connecting rod 3321c and the thigh driving rod 3322a, causing the thigh support 3120 to pivot relative to the hip support 3110 and the calf support 3130 to pivot relative to the thigh support 3120.

[0112] Please see Figure 12 , Figure 12 This is a partial side view of a chair structure according to the fourth embodiment of the present invention. For the sake of simplicity, the chair structure of the fourth embodiment is similar to that of the third embodiment, except that the thigh driving rod 4322a is pivotally connected between the driving rod 4321a and the thigh connecting rod 4322c, and the pivot point of the thigh driving rod 4322a is the same as the pivot point of the connecting rod 4321c. From the above embodiments, it can be seen that the present invention has the following advantages. First, the leg lifting mechanism can change the angle between the hip support and the thigh support, and the angle between the thigh support and the lower leg support; the backrest driving mechanism can change the angle between the chair frame and the backrest support, and the angle between the chair frame and the armrest support. Second, the anti-pinch rod can prevent user injury when the lower leg connecting rod group moves. Third, the vertical driving mechanism and the horizontal driving mechanism can make the chair body vibrate in the vertical and horizontal directions respectively. This improves the comfort and flexibility of the chair structure.

[0113] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Any person skilled in the art may make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A chair structure, characterized in that, Include: Chair frame; The chair body, set in the chair frame, includes: Hip support; Thigh support, pivotally connected to the hip support; and The lower leg support is pivotally connected to the thigh support; and Leg lifting mechanism, including: A leg drive assembly is disposed on the chair frame; and Leg linkage module, including: The lower leg linkage group, pivotally connected to the lower leg support and driven by the leg drive assembly, includes a drive rod, one end of which is pivotally connected to the leg drive assembly; and A thigh linkage group, pivotally connected to the thigh support and the lower leg linkage group, the thigh linkage group including a thigh drive rod; When the leg drive assembly drives the lower leg linkage group, the lower leg linkage group is lifted, and the drive rod causes the thigh linkage to pivot, allowing the lower leg linkage group to drive the thigh linkage group to lift the thigh support together.

2. The chair structure as described in claim 1, characterized in that, This lower leg linkage group further includes: Anti-pinch rod, pivotally connected to the lower leg support; and The linkage is pivotally connected between the anti-pinch rod and the other end of the drive rod.

3. The chair structure as described in claim 1, characterized in that, This thigh linkage group also includes: The elastic component is pivotally connected at one end to the chair frame and at the other end to the thigh actuation rod.

4. The chair structure as described in claim 1, characterized in that, The chair further includes a base, a frame, and a backrest drive mechanism. The chair body also includes a backrest support and a backrest support rod. The backrest support is pivotally connected to the hip support, and the backrest support rod is pivotally connected between the frame and the backrest support. The frame is disposed on the base and includes a slide rail. The chair frame is movably disposed on the slide rail. The backrest drive mechanism is disposed on the frame and includes: A backrest drive assembly is disposed on the chair frame; as well as A screw is screwed to the chair frame and is driven to rotate by the chair back drive assembly; The chair back drive assembly drives the screw, causing the chair frame to slide along the length of the slide rail, while changing the angle between the chair frame and the back support.

5. The chair structure as described in claim 4, characterized in that, It also includes a movable plate and a vertical drive mechanism, the vertical drive mechanism comprising: A vertical drive assembly is mounted on the base. A vertical drive wheel, coupled to the vertical drive assembly; and A vertically eccentric joystick is pivotally connected to the vertical drive wheel; The movable plate is linked to the vertical eccentric joystick, the chair frame is pivotally connected to the movable plate, and the vertical drive wheel is driven to rotate by the vertical drive assembly to drive the vertical eccentric joystick to cause the movable plate and the chair frame to vibrate vertically.

6. The chair structure as described in claim 5, characterized in that, It also includes a horizontal drive mechanism, which comprises: A horizontal drive assembly is mounted on the movable plate; A horizontal drive wheel, coupled to the horizontal drive assembly; and A horizontally eccentric joystick, one end of which is pivotally connected to the horizontal drive wheel, and the other end of which is pivotally connected to the chair frame; The horizontal drive wheel is driven to rotate by the horizontal drive assembly, thereby driving the horizontal eccentric joystick to cause the chair frame to vibrate horizontally.

7. A chair structure, characterized in that, Include: Chair frame; The chair body, set in the chair frame, includes: Hip support; Thigh support, pivotally connected to the hip support; and The lower leg support is pivotally connected to the thigh support; and A leg lifting mechanism, disposed on the chair frame and comprising: A leg drive assembly is disposed on the chair frame; and The leg linkage module is pivotally connected between the leg drive assembly, the thigh support and the lower leg support, and is driven by the leg drive assembly. When the leg drive assembly drives the leg linkage module, it raises the leg linkage module and raises the thigh support and the lower leg support, causing the thigh support to pivot relative to the hip support.

8. The chair structure as described in claim 7, characterized in that, The leg linkage module includes: Lower leg linkage group, including: A drive rod, one end of which is pivotally connected to the leg drive assembly; Anti-pinch rod, pivotally connected to the lower leg support; and The linkage is pivotally connected between the anti-pinch rod and the other end of the drive rod; and Thigh linkage group, including thigh-driven linkage; Specifically, the leg drive assembly drives the drive rod to lift the lower leg support to a first position, while the thigh linkage group remains in its initial position without being driven. When the leg drive assembly drives the drive rod to lift the lower leg support from the first position to a second position, the drive rod causes the thigh linkage to pivot, allowing the thigh support to pivot relative to the hip support to move to the lifted position.

9. The chair structure as described in claim 7, characterized in that, The chair further includes a base, a chair frame, and a backrest drive mechanism. The chair body also includes an armrest bracket, an armrest support rod, a backrest bracket, and a backrest support rod. The armrest bracket is pivotally connected to the chair frame, the armrest support rod is pivotally connected between the armrest bracket and the chair frame, the backrest bracket is pivotally connected to the hip support, and the backrest support rod is pivotally connected between the chair frame and the backrest bracket. The chair frame is disposed on the base and includes a slide rail, the chair frame is movably disposed on the slide rail, and the backrest drive mechanism is disposed on the chair frame and includes: A backrest drive assembly is disposed on the chair frame; as well as A screw is screwed to the chair frame and is driven to rotate by the chair back drive assembly; The chair back drive assembly drives the screw to make the chair frame slide along the length extension direction of the slide rail, while changing the angle between the chair frame and the back support and the angle between the chair frame and the armrest support.

10. The chair structure as described in claim 9, characterized in that, It also includes a movable plate and a vertical drive mechanism, the vertical drive mechanism comprising: A vertical drive assembly is mounted on the base. A vertical drive wheel, coupled to the vertical drive assembly; and A vertically eccentric joystick is pivotally connected to the vertical drive wheel; The movable plate is linked to the vertical eccentric joystick, the chair frame is pivotally connected to the movable plate, and the vertical drive wheel is driven to rotate by the vertical drive assembly to drive the vertical eccentric joystick to cause the movable plate and the chair frame to vibrate vertically.

11. The chair structure as described in claim 10, characterized in that, It also includes a horizontal drive mechanism, which comprises: A horizontal drive assembly is mounted on the movable plate; A horizontal drive wheel, coupled to the horizontal drive assembly; and A horizontally eccentric joystick, one end of which is pivotally connected to the horizontal drive wheel, and the other end of which is pivotally connected to the chair frame; The horizontal drive wheel is driven to rotate by the horizontal drive assembly, thereby driving the horizontal eccentric joystick to cause the chair frame to vibrate horizontally.

12. The chair structure as described in claim 11, characterized in that, The chair frame includes a frame bottom adjacent to the base, and the horizontal drive mechanism further includes a horizontal swing arm pivotally connected to the frame bottom and the horizontal eccentric joystick, so that the horizontal drive mechanism drives the chair frame to vibrate horizontally.

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