Heavy-load electric chair

Abstract

The utility model discloses a heavy-load electric chair which comprises a base, a seat assembly, a backrest assembly, a footstool assembly and a driving assembly, the seat assembly is operably connected with the base; the backrest assembly comprises at least one backrest mounting bracket, the backrest mounting bracket is used for mounting a backrest, and the backrest assembly is operably connected with the seat assembly; the footstool assembly comprises at least one footstool mounting bracket and a plurality of connecting rod components; the plurality of connecting rod components are used for operably connecting the at least one footstool mounting bracket with the seat assembly; the driving assembly is operably connected with the footstool assembly and the backrest assembly so as to drive the footstool assembly to move between the stretching position and the retracting position and enable the backrest assembly to move between the upright position and the leaning-back position, and the seat has the advantages of being simple in structure and capable of supporting heavier weight loads.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of electric chair, concretely relates to a heavy load electric chair. BACKGROUND

[0002] Electric chairs are widely known in modern life, and they are widely used in many spaces such as residences and offices due to their excellent convenience and practicality. Whether it is daily home relaxation or long-time desk work in an office environment, electric chairs can provide people with comfortable seating and flexible adjustment functions. As far as the present is concerned, the conventional electric chair is designed, and due to the linkage and traction between the components, the safe bearing weight is about three hundred pounds, which can meet the use needs of most people. However, it cannot be ignored that there are specific groups in society whose weight exceeds the conventional bearing limit of three hundred pounds. Due to weight restrictions, this group of people faces many inconveniences when using electric chairs, and even has safety hazards. In view of this, in order to enable electric chairs to adapt to a wider range of people, a heavy load electric chair is proposed. SUMMARY

[0003] The utility model aims at at least solving one of the technical problems existing in the prior art.

[0004] To this end, the utility model provides a heavy load electric chair, which has the advantages of simple structure and can support heavier weight load.

[0005] According to the heavy load electric chair of the utility model embodiment, including: base, seat assembly, backrest assembly, foot stool assembly, drive assembly, the seat assembly is operable connected with base, the backrest assembly includes at least one backrest mounting bracket, and the backrest mounting bracket is used to install backrest, and the backrest assembly is operable connected with seat assembly, the foot stool assembly includes at least one foot stool mounting bracket and multiple connecting rod components, and multiple connecting rod components are operable connected with seat assembly at least one foot stool mounting bracket, and the drive assembly is operable connected with foot stool assembly and backrest assembly, to drive foot stool assembly to move between extension and contraction, and make backrest assembly move between upright and reclining position.

[0006] According to one embodiment of the utility model, the drive assembly is used to drive foot stool assembly to move between extension and contraction and backrest assembly to move between upright and reclining position in a sequential manner.

[0007] According to one embodiment of the utility model, the drive assembly is used to move foot stool assembly from the contraction position to the extension position, and then move backrest assembly from the upright position to the reclining position.

[0008] According to one embodiment of the utility model, the seat assembly comprises: at least one first connecting plate, a limiting connecting rod, a first spring; the first connecting plate is pivotally connected with a second connecting plate; the limiting connecting rod is pivotally connected with the base; one end of the first spring is connected with the limiting connecting rod, and the other end of the first spring is connected with the second connecting plate, so as to prevent the backrest mounting support from moving from the upright mounting position to the backward-tilting position until the foot stool assembly moves from the retracted position to the extended position.

[0009] According to one embodiment of the utility model, the driving assembly comprises a linear actuator.

[0010] According to one embodiment of the utility model, a power-driven pipe is further included, the power-driven pipe is installed in the first connecting plate, and the linear actuator is operatively connected with the power-driven pipe.

[0011] According to one embodiment of the utility model, the linear actuator comprises a motor, a track and a sliding block, and the sliding block is slidingly connected to the track.

[0012] According to one embodiment of the utility model, at least one first driving connecting rod is further included, and the first driving connecting rod connects the sliding block and the power-driven pipe.

[0013] According to one embodiment of the utility model, a support structure is further included, the support structure comprises at least one rear swing connecting rod and a front swing connecting rod, the rear swing connecting rod is used for connecting the base and the second connecting plate, the rear swing connecting rod is further connected with an L-shaped connecting rod, the front swing connecting rod is used for connecting the base and the L-shaped connecting rod, the rear end of the L-shaped connecting rod is connected with the rear swing connecting rod and the second connecting plate, the second connecting plate is connected with the first connecting plate, and the rear swing connecting rod, the second connecting plate, the front swing connecting rod, the L-shaped connecting rod and the first connecting plate are connected to form the support structure, the number of structural components in the support structure is significantly reduced, the overall structure of the electric chair is more solid, and thus a heavier weight load can be supported.

[0014] The utility model discloses a driving assembly is used to complete the movement of foot stool assembly and backrest assembly, reduces the number of driving assembly, reduces the component of linkage relationship and produces, makes the overall structure more solid and reasonable, therefore increases the bearing capacity of electric chair.

[0015] The rear swing connecting rod, the second connecting plate, the front swing connecting rod, the L-shaped connecting rod and the first connecting plate are connected to form a support structure, the number of structural components in the support structure is significantly reduced, the overall structure of the electric chair is more solid, and thus a heavier weight load can be supported.

[0016] The other features and advantages of the present application will be more apparent from the following description, and will be partially apparent from the description, or will be understood by those skilled in the art by implementing the present application.

[0017] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 is a right rear side perspective view of the overall structure of the present application;

[0020] Figure 2 is a schematic view of the foot stool assembly of the overall structure of the present application in an extended state;

[0021] Figure 3 is a side view of the seat assembly structure of the present application;

[0022] Figure 4 is a side view of the seat assembly structure of the present application, and part of the content is hidden for easy display;

[0023] Figure 5 is a connection diagram of the backrest assembly and the seat assembly of the present application;

[0024] Figure 6 is a right front side perspective view of the overall structure of the present application;

[0025] Figure 7 is a right front side structure schematic view of the present application, and part of the content is hidden for easy display;

[0026] Figure 8 is a right front side structure schematic view of the present application, and part of the content is hidden for easy display; Figure 7 The enlarged schematic view of the circled part is a connection diagram of the L-shaped corner support frame, the bracket support connecting rod, the spring mounting bracket and the spring connecting plate;

[0027] REFERENCE NUMERALS:

[0028] 100. motorized chair; 102. base; 104. backrest assembly; 106. seat assembly; 108. ottoman assembly; 110. drive assembly; 112. side beam; 114. rear cross beam; 116. front cross beam; 118. backrest mounting bracket; 120. direct link; 122. first connection point; 124. first connection plate; 126. seat frame; 128. side frame member; 130. rear end frame member; 132. front end frame member; 134. second connection point; 136. second connection plate; 138. third connection point; 140. fourth connection point; 142. rear swing link; 143. fifth connection point; 144. L-shaped link; 146. sixth connection point; 148. stabilizing link; 150. front swing link; 152. seventh connection point; 153. eighth connection point; 154. ninth connection point; 156. limit link; 157. tenth connection point; 158. spring connection; 160. first pin; 162. second drive link; 163. second pin; 164. eleventh connection point; 166. Z-shaped link; 168. twelfth connection point; 174. guide slot; 176. limit pin; 178. first cross beam; 180. second cross beam; 182. third cross beam; 184. fourth cross beam; 186. linear actuator; 188. cross bar; 190. slider; 192. track; 194. connection; 196. first drive link; 198. thirteenth connection point; 200. L-shaped mounting bracket; 202. fourteenth connection point; 204. angle steel; 205. power drive tube; 206. bushing; 208. outer power drive arm; 210. L-shaped support link; 212. fifteenth connection point; 214. lower swing link; 216. sixteenth connection point; 218. seventeenth connection point; 220. upper support link; 222. eighteenth connection point; 224. secondary ottoman support plate; 226. nineteenth connection point; 228. primary ottoman support link; 230. twentieth connection point; 232. bracket support link; 234. twenty-first connection point; 236. upper swing link; 238. twenty-second connection point; 240. twenty-third connection point; 242. lower support link; 244. twenty-fourth connection point; 246. twenty-fifth connection point; 248. twenty-sixth connection point; 250. limit block; 252. secondary ottoman support plane; 254. L-shaped gusset bracket; 256. primary ottoman support plane; 262. spring connection plate; 264. hole; 266. spring mounting bracket. DETAILED DESCRIPTION

[0029] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein like symbols generally indicate like items throughout the drawings. The embodiments described below are examples of implementations and it should be understood that the present application is not limited to these implementations.

[0030] In the description of the utility model, it needs to be understood that, the orientation or positional relation indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientation or positional relation shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as limiting the utility model. In addition, the features defined as "first" and "second" can explicitly or implicitly include one or more features. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0031] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] The heavy load electric chair of the utility model embodiment is specifically described below with reference to the drawings.

[0033] As shown in Figures 1-8 According to the heavy load electric chair of the utility model embodiment, the electric chair 100 comprises a base 102, a backrest assembly 104, a seat assembly 106, a footrest assembly 108 and a driving assembly 110. The base 102 comprises a pair of oppositely arranged and longitudinally extending side beams 112, a rear cross beam 114 and a front cross beam 116. The two ends of the rear cross beam 114 are fixedly connected to the rear end portions of the pair of side beams 112, as shown in Figure 7 The two ends of the front cross beam 116 are fixedly connected to the front end portions of the pair of side beams 112. The backrest assembly 104 comprises a pair of oppositely arranged backrest mounting brackets 118 and a pair of oppositely arranged straight connecting rods 120. As shown in Figure 2 A pair of straight connecting rods 120 are pivotally connected to the pair of backrest mounting brackets 118 at the upper end portions thereof at first connecting points 122. As shown in Figures 1-5 The seat assembly 106 comprises a pair of oppositely arranged first connecting plates 124, a seat frame 126 and a pair of oppositely arranged second connecting plates 136. The seat frame 126 is fixedly mounted on the pair of first connecting plates 124.Figures 1-2 As shown, the seat frame 126 comprises a pair of oppositely arranged and longitudinally extending side frame members 128, a rear end frame member 130 and a front end frame member 132; the two ends of the rear end frame member 130 are connected to the rear end portions of the pair of side frame members 128, and the two ends of the front end frame member 132 are connected to the front end portions of the pair of side frame members 128; further, as shown, Figures 2-5 As shown, a pair of first connecting plates 124 and a pair of backrest mounting brackets 118 are in one-to-one correspondence, the rear upper end portion of the first connecting plate 124 is pivotally connected to the front end portion of its corresponding backrest mounting bracket 118 at a second connecting point 134; a pair of second connecting plates 136, a pair of straight connecting rods 120 and a pair of first connecting plates 124 are in one-to-one correspondence, the second connecting plate 136 is pivotally connected to the lower end portion of the straight connecting rod 120 at a third connecting point 138 at the lower end portion thereof, and the second connecting plate 136 is pivotally connected to the lower end portion of the first connecting plate 124 at a fourth connecting point 140 at the front end portion thereof.

[0034] As shown, Figures 3-5 The rear end of the side beam 112 is connected to a rear swing connecting rod 142, the lower end portion of the rear swing connecting rod 142 is pivotally connected to the rear end portions of the pair of side beams 112 at a fifth connecting point 143, the upper end portion of the rear swing connecting rod 142 is pivotally connected to the second connecting plate 136, the rear swing connecting rod 142 is further connected to an L-shaped connecting rod 144, the rear end portion of the L-shaped connecting rod 144 is pivotally connected to the rear swing connecting rod 142 at a sixth connecting point 146, the front end of the L-shaped connecting rod 144 is connected to a stabilizing connecting rod 148, the front end portion of the L-shaped connecting rod 144 and the rear end portion of the stabilizing connecting rod 148 are pivotally connected at a seventh connecting point 152, a front swing connecting rod 150 is further connected at the seventh connecting point 152, the upper end of the front swing connecting rod 150 is connected at the seventh connecting point 152, the lower end of the front swing connecting rod 150 is pivotally connected to the front end portions of the pair of side beams 112 at an eighth connecting point 153, and the front end portion of the stabilizing connecting rod 148 is pivotally connected to the front end portion of the first connecting plate 124 at a ninth connecting point 154.

[0035] As shown, Figures 3-5 The front end portion of the side beam 112 is connected to a limiting connecting rod 156, the lower end portion of the limiting connecting rod 156 is pivotally connected to the front end portion of the side beam 112 at a tenth connecting point 157, the upper end portion of the limiting connecting rod 156 is fixedly connected to a spring connecting piece 158, the upper end portion of the spring connecting piece 158 is provided with a first pin 160, one end of a first spring is connected or attached to the first pin 160, the second connecting plate 136 is provided with a second pin 163, the other end of the first spring is connected or attached to the second pin 163. As shown, Figure 4As shown, the upper end of the limit link 156 is pivotally connected with a second driving link 162 at an eleventh connecting point 164, and the second driving link 162 is pivotally connected with a Z-shaped link 166 at a twelfth connecting point 168, and the Z-shaped link 166 is provided with a guide slot 174, and the second connecting plate 136 is provided with a limit pin 176 which is movable in the guide slot 174.

[0036] As shown in Figure 6 , the first cross beam 178, the second cross beam 180, the third cross beam 182 and the fourth cross beam 184 are respectively fixedly connected with the two rear swing links 142, the two second connecting plates 136, the two front swing links 150 and the two first connecting plates 124.

[0037] As shown in Figure 7 , the front end of the pair of side beams 112 is fixedly provided with a cross bar 188, and the driving assembly 110 comprises a linear actuator 186, a pair of oppositely arranged connecting members 194 and a pair of oppositely arranged first driving links 196, and the linear actuator 186 includes a motor, a longitudinally extending track 192 and a slider 190, and the linear actuator 186 is fixedly connected to the rear cross beam 114, and the slider 190 is slidably arranged in the track 192; the lower end of the first driving link 196 is pivotally connected to the connecting member 194 at a thirteenth connecting point 198, and the connecting member 194 is fixedly connected to the two sides of the slider 190. Figures 2-3 As shown in , 5, 7, a power driving pipe 205 is fixedly connected between the oppositely arranged second driving links 162, and the first connecting plate 124 is provided with a bushing 206, and the oppositely arranged ends of the power driving pipe 205 are arranged in the oppositely arranged bushings 206, so that the oppositely arranged ends of the power driving pipe 205 can rotate in the bushings 206; the power driving pipe 205 is provided with a transversely arranged angle steel 204; the upper end of the first driving link 196 is pivotally connected to a pair of transversely spaced and oppositely arranged L-shaped mounting brackets 200 at a fourteenth connecting point 202, and the L-shaped mounting bracket 200 is fixedly mounted on the angle steel 204, so as to drive the power driving pipe 205 to rotate through the movement of the slider 190.

[0038] As shown in Figure 2As shown, the two ends of the power driven pipe 205 are fixedly connected with outer power driven arms 208, the front end portion of the outer power driven arms 208 is pivotally connected with L-shaped support connecting rods 210 at the fifteenth connecting points 212, the rear end of the L-shaped support connecting rods 210 is connected with the outer power driven arms 208, the upper end portion of the L-shaped support connecting rods 210 is pivotally connected with lower swing connecting rods 214 at the sixteenth connecting points 216, the middle portion of the lower swing connecting rods 214 is connected with the L-shaped support connecting rods 210, the rear end of the lower swing connecting rods 214 is pivotally connected with the front end portion of the first connecting plates 124 at the seventeenth connecting points 218, the front end portion of the lower swing connecting rods 214 is pivotally connected with upper support connecting rods 220 at the eighteenth connecting points 222, the front end portion of the upper support connecting rods 220 is pivotally connected with auxiliary stool support plates 224 at the nineteenth connecting points 226, the rear end portion of the auxiliary stool support plates 224 is connected with the upper support connecting rods 220, the front end portion of the auxiliary stool support plates 224 is pivotally connected with main stool support connecting rods 228 at the twentieth connecting points 230, the rear lower end portion of the main stool support connecting rods 228 is connected with the auxiliary stool support plates 224, the front upper end portion of the main stool support connecting rods 228 is pivotally connected with a pair of bracket support connecting rods 232 at the twenty-first connecting points 234.

[0039] The front end portion of the first connecting plates 124 is pivotally connected with upper swing connecting rods 236 at the twenty-second connecting points 238, the rear end portion of the upper swing connecting rods 236 is connected with the first connecting plates 124, the middle portion of the upper swing connecting rods 236 is pivotally connected to the middle portion of the upper support connecting rods 220 at the twenty-third connecting points 240, the front end portion of the upper swing connecting rods 236 is pivotally connected with lower support connecting rods 242 at the twenty-fourth connecting points 244, the rear lower end portion of the lower support connecting rods 242 is connected with the upper swing connecting rods 236.

[0040] The middle portion of the lower support connecting rods 242 is pivotally connected to the lower middle portion of the auxiliary stool support plates 224 at the twenty-fifth connecting points 246, the upper front end portion of the lower support connecting rods 242 is pivotally connected to the rear end portion of the bracket support connecting rods 232 at the twenty-sixth connecting points 248, the upper swing connecting rods 236 is provided with a limiting block 250 for limiting the relative position between the upper swing connecting rods 236 and the upper support connecting rods 220, the auxiliary stool support plates 224 is provided with an auxiliary stool support plane 252 for supporting a stool (not shown in the figure) to be fixedly installed on the pair of oppositely arranged auxiliary stool support plates 224.

[0041] As Figure 8As shown, at least one bracket support link 232 is pivotally connected to an L-shaped corner brace 254 at the twenty-sixth connection point 248. The L-shaped corner brace 254 serves as a main footstool support plate, and its bending forms a main footstool support plane 256, which cooperates with the secondary footstool support plane 252 to support the footstool (not shown in the figure). The front end portion of the bracket support link 232 includes a laterally inwardly extending inclined section, such that the end portions of the two bracket support links 232 are parallel to each other. Since the end portions of the pair of opposing bracket support links 232 are fastened together through the hole 264, a spring connecting plate 262 can be fixed between them. The lower surface portion of the main footstool support plane 256 is provided with a spring mounting bracket 266, so that one end of a second spring (not shown in the figure) is connected to the spring mounting bracket 266, and the other end of the second spring is connected to the spring connecting plate 262.

[0042] Working principle: When the electric chair 100 is in the "seated" position, activation of the linear actuator 186 causes the slider 190 to move forward, which in turn causes a pair of opposing first drive links 196 to move forward, as shown in the figure. Figure 7 The levers pivot counterclockwise around the thirteenth connection point 198, thereby raising the upper portions of the oppositely positioned first drive links 196. Correspondingly, the ends of a pair of laterally spaced, oppositely positioned L-shaped mounting brackets 200, pivotally connected to the upper portions of the oppositely positioned first drive links 196, also move forward and upward, and pivot counterclockwise around the fourteenth connection point 202. This causes the power drive tube 205 to move forward and upward and pivot counterclockwise due to the rotation of its opposite ends within the bushing 206. Furthermore, from... Figure 2As can be most clearly understood, the pair of oppositely disposed outer drive arms 208 fixedly attached to opposite ends of the power drive tube 205 will also move forward and rotate or pivot in a counterclockwise direction about the axis defined by the power drive tube 205, and in turn, the forward end portions of the pair of oppositely disposed L-shaped support links 210 will move the pair of oppositely disposed lower swing links 214 in a counterclockwise direction. In turn, the counterclockwise movement of the pair of oppositely disposed lower swing links 214 will move the pair of oppositely disposed upper support links 220 forward. Since the pair of oppositely disposed upper swing links 236 are attached to the pair of oppositely disposed upper support links 220, the pair of oppositely disposed upper swing links 236 will pivot or rotate in a counterclockwise direction, thereby pushing the pair of oppositely disposed lower support links 242 forward, and in turn, moving the pair of oppositely disposed ottoman support plates 224 in a counterclockwise direction. Thus, since the forward end portions of the pair of oppositely disposed ottoman support plates 224 are operatively connected to the pair of oppositely disposed cradle support links 232 and the main ottoman support deck 256, the pair of oppositely disposed cradle support links 232 and the main ottoman support deck 256 will move in a counterclockwise direction, such that the ottoman assembly 108 is now fully extended.

[0043] Further, as the power drive tube 205 moves forward, since the opposite ends of the power drive tube 205 are mounted within the pair of oppositely disposed bushings 206, which in turn are mounted within the pair of oppositely disposed first connecting plates 124, the pair of oppositely disposed first connecting plates 124 will also move forward. Thus, the pair of oppositely disposed second connecting plates 136 will move forward, and in turn, cause the pair of oppositely disposed rear swing links 142 to pivot or rotate in a clockwise direction. In addition, from Figure 3 As can be most clearly understood, the movement of the pair of oppositely disposed rear swing links 142 will cause the pair of oppositely disposed L-shaped links 144 to move forward, and in turn, the movement of the pair of oppositely disposed L-shaped links 144 will cause the pair of oppositely disposed front swing links 150 to pivot or rotate in a clockwise direction. At the same time, the pair of oppositely disposed second drive links 162 will move forward and pivot or rotate in a counterclockwise direction about the axis defined by the power drive tube 205, thereby pulling the pair of oppositely disposed Z-shaped links 166 forward and upward, causing the pair of oppositely disposed limit pins 176 to move downward within the pair of oppositely disposed guide slots 174 defined within the pair of oppositely disposed Z-shaped links 166.

[0044] When the pair of oppositely disposed limit pins 176 reach the bottom end portions of the pair of oppositely disposed guide slots 174, the pair of oppositely disposed Z-shaped links 166 will generally cause the pair of oppositely disposed second connecting plates 136 to pivot in a counterclockwise direction about the sixth connecting points 146, which in turn will generally cause the pair of oppositely disposed straight links 120 to pivot or rotate in a counterclockwise direction, and likewise will cause the pair of oppositely disposed backrest mounting brackets 118 to pivot or rotate in a counterclockwise direction about the second connecting points 134. In this manner, the backrest will now be in a reclined or tilted back position. However, as shown in Figure 5 the pair of oppositely disposed spring connectors 158 are each fitted with a first pin 160 to which one end of a first spring can be connected or attached, and similarly a second pin 163 is mounted on each of the pair of oppositely disposed second connecting plates 136 for connecting or attaching the other end of the first spring. Thus, when the linear actuator 186 is activated and the slider 190 moves forward, the first spring will be stretched and will apply a force to the pair of oppositely disposed second connecting plates 136 to cause the pair of oppositely disposed second connecting plates 136 to pivot in a clockwise direction about the sixth connecting points 146, which in turn will cause the pair of oppositely disposed straight links 120 to pivot or rotate in a clockwise direction, and likewise will cause the pair of oppositely disposed backrest mounting brackets 118 to pivot or rotate in a clockwise direction about the second connecting points 134. In this manner, the backrest will now be in a forward or upright position. Figure 3From the perspective of [unclear context], the pair of opposing second drive links 162 will pivot counterclockwise and move forward together with the power drive tube 205. Therefore, the pair of opposing Z-shaped links 166 will be pulled forward and upward, causing the opposing guide grooves 174 defined on the opposing Z-shaped links 166 to exert an upward and forward force on the opposing limit pins 176, which will cause the pair of opposing second connecting plates 136 to pivot counterclockwise. The movement of the opposing second connecting plates 136 will cause the opposing straight link 120 to rotate counterclockwise as well, which in turn will cause the opposing backrest mounting bracket 118 to pivot or rotate counterclockwise, thereby achieving a reclining position. However, the first spring connecting the opposing first pin 160 and the opposing second pin 163 will apply a predetermined force to effectively prevent the pair of opposing connecting plates from pivoting counterclockwise, thereby preventing the pair of opposing backrest mounting brackets 118 from reclining. Furthermore, once the linear actuator 186 drives the power drive tube 205 to fully extend the footrest assembly 108, the opposing first connecting plate 124 continues to move forward and upward, driving the opposing second connecting plate 136 to pivot counterclockwise, thereby effectively overcoming the force of the first spring. This allows the opposing backrest mounting brackets 118 to now tilt backward. Therefore, not only is the footrest assembly 108 moved to its extended position and the opposing backrest mounting brackets 118 moved to their tilted positions using a single linear actuator 186, but also, the footrest assembly 108 and the pair of opposing backrest mounting brackets 118 extend and tilt in a sequential manner or operating mode under the control of only a single linear actuator 186. Furthermore, given that only a single linear actuator 186 is used to perform these two operating modes—the movement of the footrest assembly 108 and the movement of the relatively positioned backrest mounting bracket 118—the number of operable parts constituting the entire electric chair 100 structure is significantly reduced. This effectively makes the overall structure of the electric chair 100 more robust, thereby enabling the electric chair 100 to withstand heavier loads or weights than usual.

[0045] like Figure 8 As shown, if any foreign object becomes lodged under the main footrest support plate, the main footrest support plate can simply pivot around the twenty-sixth connection point 248 against the elastic force of a second spring (not shown), which is connected between the spring mounting bracket 266 and the spring connecting plate 262. Once the foreign object is removed, the elastic force of the spring allows the main footrest support plate to return to its original position.

[0046] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made thereto without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A heavy-duty electric chair, characterized in that, include: Base (102); Seat assembly (106), which is operatively connected to base (102); A backrest assembly (104) includes at least one backrest mounting bracket (118) for mounting a backrest, and the backrest assembly (104) is operatively connected to a seat assembly (106). Footstool assembly (108) includes at least one footstool mounting bracket and a plurality of linkage components that operatively connect at least one footstool mounting bracket to a seat assembly (106); A drive assembly (110) is operatively connected to a footstool assembly (108) and a backrest assembly (104) to drive the footstool assembly (108) to move between extended and retracted positions and to move the backrest assembly (104) between upright and reclining positions.

2. The heavy-duty electric chair according to claim 1, characterized in that, The drive assembly (110) is used to sequentially drive the footstool assembly (108) to move between extended and retracted positions and the backrest assembly (104) to move between upright and reclining positions.

3. The heavy-duty electric chair according to claim 2, characterized in that, The drive assembly (110) is used to move the footstool assembly (108) from the retracted position to the extended position, and then move the backrest assembly (104) from the upright position to the reclining position.

4. The heavy-duty electric chair according to claim 3, characterized in that, The seat assembly (106) includes: At least one first connecting plate (124), the first connecting plate (124) being pivotally connected to a second connecting plate (136); A limiting link (156) is pivotally connected to the base (102); A first spring, one end of which is connected to a limiting link (156), and the other end of which is connected to a second connecting plate (136), is used to prevent the backrest mounting bracket (118) from moving from the upright mounting position to the reclining position until the footstool assembly (108) moves from the retracted position to the extended position.

5. The heavy-duty electric chair according to claim 1, characterized in that, The drive assembly (110) includes a linear actuator (186).

6. The heavy-duty electric chair according to claim 5, characterized in that, It also includes a power drive tube (205), which is installed in the first connecting plate (124), and the linear actuator (186) is operably connected to the power drive tube (205).

7. The heavy-duty electric chair according to claim 6, characterized in that, The linear actuator (186) includes a motor, a track (192) and a slider (190), the slider (190) being slidably connected to the track (192).

8. The heavy-duty electric chair according to claim 7, characterized in that, It also includes at least one first drive link (196) that connects the slider (190) and the power drive tube (205).

9. The heavy-duty electric chair according to claim 4, characterized in that, It also includes a support structure, which includes at least one rear swing link (142) and a front swing link (150). The rear swing link (142) is used to connect the base (102) and the second connecting plate (136). The rear swing link (142) is also connected to an L-shaped link (144). The front swing link (150) is used to connect the base (102) and the L-shaped link (144). The rear end of the L-shaped link (144) is connected to the rear swing link (142) and the second connecting plate (136).

Images