TWI717715B - Lifting mechanism and chairs - Google Patents

Abstract

An adjustable lifting mechanism for use as or with a seating apparatus. The lifting mechanism has a base to which a pivot of a parallelogram structure is attached. A spring extends from a first link of the parallelogram to an adjustable termination point on a second link of the parallelogram to form a lifting triangle. The spring termination point is displaced from a main pivot of the parallelogram to create an adjustable “lever arm” to vary the lifting force. A lifting power adjustment mechanism adjusts the position of the spring termination point with respect to the main pivot.

Description

Lifting mechanism and chair

The present invention relates to devices for assisting individuals, and more particularly to lifting mechanisms and chairs.

As life expectancy increases, people may not be able to maintain the strength of their arms, legs, and central muscles to easily stand up from their chairs. The sick and those with impaired related abilities may also have troubles with this overall action.

Senior seats are usually constructed higher from the bottom, but are therefore not very comfortable. The lower chair (including the plush armchair) is comfortable to sit for a long time, but it is difficult to stand up. The existing lifting chair cannot provide optimal support for the anatomically standing up from sitting down to standing.

Electric versions are usually lifted by tilting the entire chair structure. Tilting the entire chair structure shifts the body forward and tilts the seat to a point that is usually scary. The conventional spring-powered chair cannot achieve consistent improvement (equal elasticity) or an ergonomically appropriate lifting geometric structure.

When a human body's torso rises from a sitting position to a standing position, the hip joint usually makes a circular motion with a radius equal to the length of the human thigh. With the knee joint as the center, when the hip and the vertical plane above the ankle intersect, this arching movement naturally ends. Ideally, a person’s knee joints will remain roughly fixed; but if the person’s center of mass does not compensate for the extreme imbalance obtained before the person’s center of mass reaches the standing position, an extremely large amount of force must be applied to push the armrest down to provide a success The lifting auxiliary chair will easily exert force.

Therefore, in the absence of lifting assistance, instruct the person with a mobility disorder to move to the front of the seat cushion, and then stagger forward three steps (with more effort at a time) so that the center of mass crosses his feet and then stands upright.

Ideally, a lifting assist chair or cushion would allow the user to stand up at or near a natural human step, which is different from the significantly slow and noisy process of an electric lifting assist chair advancing to its awkwardly inclined position.

An adjustable lifting mechanism for use as a seat device or used with a seat device is disclosed. In an illustrative embodiment, the lifting mechanism has a base to which a pivot of a parallelogram structure is attached. The parallelogram structure has four pivotally connected links. A spring extends from a first link of the parallelogram to an adjustable end point on a second link of the parallelogram to form a lifting triangle, wherein the spring end point is from a main pivot of the parallelogram Axis displacement. The displacement of the spring termination point from the main pivot forms a "lever arm" that can affect the lifting force. A lifting power adjusting mechanism adjusts the position of the spring end point relative to the main pivot. An extension is provided in a fixed relationship to one of the four parallelogram links, and is configured to be at the angle of the parallelogram based on the elevation of the lifting mechanism between a sitting mode and a standing mode Or reduce and maintain its angle relative to the horizontal when it changes. The extension can form a rear seat section or support a base of a rear seat section. A front seat section is pivotally attached to the rear seat section to allow the front seat section to swing downward when the mechanism is raised from a sitting mode to a standing mode.

This application claims the title as "chair lift (Lifting Chair)" of US Provisional Application No. 62/649809 and title on March 29, 2018 filed the "walking chair lift (Elevating Walker Chair)" as of 2018 Priority of the US provisional application No. 62/649746 filed on March 29, 2005, all of these US provisional applications are hereby incorporated by reference.

Compared with the amount of energy required to stand up from a traditional chair, an illustrative embodiment of a lifting chair can reduce the energy consumption so that the center of balance of a user in a sitting position is displaced beyond the fixed knee of the person And feet.

The illustrative embodiment of the lifting chair mechanism can be equalized within the entire displacement (from sitting to standing) of the center of gravity of a user, so that the weight of a user is reduced or reduced as an obstacle to any part of the movement of the user. eliminate.

An illustrative embodiment of a lifting chair includes an adjustable mechanism to adapt the lifting power to a wide range of body weights.

An illustrative embodiment of a chair lift mechanism can also be provided for extracting and reinserting a member of a generally wedge-shaped or other supplementary intermediate seat support section that must be removed This allows to fold a raised seat cushion and be restored when returning to the sitting position without hindering the standing and sitting movements of a user.

Another option is that the middle seat support can be fixed relative to the base frame of the lifting mechanism, so that the seat moves toward and away from the middle seat support to realize seat support or folding.

Figure 1 is an isometric diagram of an illustrative lift chair 100 transitioning between a standing mode and a sitting mode. The lift chair 100 has a seat 114 including a front seat section 116 and a rear seat section 118. In the sitting mode, the front seat section 116 and the rear seat section 118 (for example) are adjacent to each other to form a surface suitable for sitting on. The seat sections 116, 118 can have various shapes of conventional chairs.

Fig. 2 is an isometric diagram of the lifting chair 100 in a standing mode or from a sitting mode to a standing mode (depending on the specific design of the chair). The rear seat section 118 is raised from the sitting position by transitioning from a sitting position to a standing position to help an occupant leave the lifting chair 100. The front seat section 116 slopes downward to help an occupant transfer weight from the seat section 114 to the occupant's legs. The optional flexible panel 119 has a first edge attached to a seat back 108 of the lift chair 100 and a second edge attached to the rear seat section 118. The flexible panel 119 shields one of the lifting mechanisms contained in the lifting chair 100, for example, such as the lifting mechanism 104 or the lifting mechanism 350 shown in FIG. 29. The flexible panel 119 may be detachable to allow the use of the lifting mechanism 104 and its adjustment components.

FIG. 3 shows an illustrative cross-section of a lift chair 100 taken through the cross-section 3-3 of FIG. 4 in a sitting mode. FIG. 5 shows a cross-section of the lifting chair 100 taken through the section 5-5 of FIG. 6 from a sitting mode to a standing mode. FIG. 7 shows a cross section of the lift chair 100 taken through the section 7-7 of FIG. 8 in a standing mode.

The lifting chair 100 has a chair frame 102 and a lifting mechanism 104 attached to the chair frame 102. The chair frame 102 may have any configuration that includes components that together form a seating device, such as, for example, an armchair, desk chair, backless chair, or elevating walking chair. In an illustrative embodiment, the frame 102 has a plurality of legs 106, a seat back 108, and a base 110. The chair frame 102 may also include a seat support 112 that provides support for the seat 114. Alternatively, the lifting mechanism 104 may have a seat fully incorporated therein or attached to one of it, in which case the components of the lifting mechanism 104 form a seat.

Figures 3, 5, and 7 show a seat 114 with a front seat section 116 and a rear seat section 118. Both the front seat section 116 and the rear seat section 118 are directly or indirectly attached to the lifting mechanism 104 . In this illustrative embodiment, the seat sections 116, 118 include cushions. The cushions of the front seat section 116 and the rear seat section 118 are attached to the front seat support section 158 and the rear seat support section 160, respectively, such as shown in FIG. 12, FIG. 13, FIG. 21, and FIG. 24, for example . The rear seat section 118 is hinged or otherwise pivotally attached to the front seat section 116 at the first seat pivot 122 to allow the lifting mechanism 104 to be used to raise or lower a user from a sitting position When a sitting position is reached, the relative position of the rear seat section 118 and the front seat section 116 is modified. The seat 114 may also include an intermediate seat support section 120 that reinforces or strengthens the seat 114 in the area below the first seat pivot 122.

As can be seen, for example, in FIGS. 3, 5, and 7, the lifting mechanism 104 includes a parallelogram frame 124. The parallelogram frame 124 has a first set of parallel links 126, 128 and a second set of parallel links 130, 132, the two sets of parallel links are pivotally attached to each other at pivots 134, 136, 138, 140 To form a parallelogram. The parallelogram link 126 has an extension 150 arranged at an angle to the parallelogram link 126, which will be described in more detail below.

9 to 12 show further illustrations of the lifting mechanism 104 in a standing mode or changing from a sitting mode to a standing mode. Figure 9 is an isometric rear view of one of the lifting mechanisms 104. FIG. 10 is a side view of the lifting mechanism 104.

9 and 10 show the front seat section 116, the rear seat section 118, and the middle seat section 120 attached to the lifting mechanism 104. FIG. FIG. 11 shows a side view of the lifting mechanism 104 when the cushion parts of the front seat section 116 and the rear seat section 118 are not attached. FIG. 12 is an isometric front view of the lifting mechanism 104 also without the cushion portion of the seat section 116 and the rear seat section 118. The spring 142 is attached to a spring axle at the longitudinal center of the axle. The spring wheel shaft pivots relative to the parallelogram link 132 at a spring pivot shaft 144. The spring 142 is pivotally attached at one end of the extension 150 opposite to the starting point of the extension 150 at the parallelogram link 126. The extension 150 may be attached to the parallelogram link 126 or be integrated with the parallelogram link 126. The spring pivot 144 can be adjusted along a section of the parallelogram link 132. In the illustrative embodiment shown, the spring 142 is attached to a spring axle that extends into a slot 156 and thereby can be adjusted along the slot 156 and therefore along the parallelogram link 132. The slot 156 can be linear, or have a circular arc shape centered on the opposite end of the spring 142 when extending.

It should be noted that although the spring wheel shaft is not explicitly shown in the figure, its position is obvious by the mark of the spring pivot 144, and note that the spring wheel shaft extends perpendicularly to the plane of the parallelogram connecting rod 132.

Returning to FIG. 5, the seat 114 is transitioning from a sitting mode to a standing mode by the operation of the lifting mechanism 104 to provide assistance to a user when standing up from a sitting position. When the parallelogram frame 124 pivots at the pivots 134, 136 relative to the lifting mechanism side support 146, the seat 114 is raised. When an occupant stands, the weight of the occupant begins to transfer to the bottom surface, thereby allowing the spring 142 to expand. When the extension 150 pivots about the pivot 140 relative to the parallelogram link 130, the distance from the upper spring pivot 152 to the pivot 144 increases, thereby providing the distance required for the expansion of the spring 142. When the lift chair 100 is in a sitting mode, the spring 142 is compressed by the weight of an occupant.

For example, the spring 142 may be a compression spring, such as a gas spring. Other illustrative spring types include tension springs (which will be deployed oppositely on a parallelogram to provide the same lifting force). In an exemplary embodiment, the spring 142 is a gas spring having a diameter in the range of 20 mm to 45 mm and a rod diameter in the range of 10 mm to 20 mm. An explanatory force progression range from full extension to full compression is 45% to 55%, resulting in a "p1" value in the range of 2600 N to 1,300 N and a range of 1700 N to 4200 N A "p2" value. In an illustrative embodiment, the spring 142 has a stroke range of 75 mm to 85 mm and an uncompressed length in the range of 200 mm to 275 mm.

When the parallelogram links 126, 128, 130, 132 of the parallelogram frame 124 pivot around the pivots 134, 136, 138, 140, the seat sections 116, 118, 120 of the seat 114 are moved. When the seat 114 transitions from a standing mode to a sitting mode, the rear seat support section 160 remains relatively parallel to the bottom surface, the front seat section 116 pivots about the seat pivot 122 relative to the rear seat section 118, and therefore Rotate downward by an angle from horizontal or close to a horizontal position. Depending on the desired design of the chair, the front seat support section 158 and the rear seat support section 160 can be tilted from a level in a sitting mode. For example, the front part of the seat 114 may be higher than the rear part of the seat 114. Similarly, the seat back 108 may be vertical or inclined from vertical to achieve a desired position for practicality or comfort. Since the middle seat section 120 is directly or indirectly attached to a parallelogram link, when the parallelogram link 130 reaches a horizontal position, the middle seat section 120 automatically moves to a proper position to be below the seat pivot 122 Support seat 114.

In the illustrative embodiment shown in FIGS. 9 to 12, the front seat support section 158 is connected to the middle seat support section 162 by the tie rod 164 at the first tie rod pivot 168. One second end of the tie rod 164 is pivotally attached to the front seat support section 158 at the second tie rod pivot 172. When the lifting chair 100 changes from a sitting mode to a standing mode, the parallelogram link 130 of the parallelogram frame 124 rotates around the pivots 134 and 140, thereby causing the middle seat support section 162 to move away from the front seat section 116 and The rear seat section 118 moves. This allows the front seat support section 158 to pivot downward relative to the rear seat support section 160.

Figures 21 to 24 show the lifting mechanism 104 in a sitting mode. Figure 21 is an isometric rear view of one of the lifting mechanisms 104. FIG. 22 is a side view of the lifting mechanism 104. The front seat section 116, the rear seat section 118, and the middle seat section 120 are shown attached to the lifting mechanism 104 in FIGS. 21 and 22. FIG. 23 shows a side view of the lifting mechanism 104 without a seat cushion. Figure 24 is an isometric front view of one of the lifting mechanism 104.

Figure 22 shows the front section 116 and the rear section 118 forming a sitting surface in the sitting mode. The middle seat section 120 pivots to a proper position below the seat pivot 122.

In the embodiments shown in FIGS. 9 to 12 and 21 to 24, the middle seat support section 162 and the rear seat support section 160 have a platform supporting a spring 176, and a rigid component such as a wooden platform In comparison, these platforms can form a more comfortable base. However, the present invention encompasses chair designs incorporating such rigid platforms or other supports for cushions.

The front seat support section 158 is shown as a support rod 178. Additional structural components may form the front seat support section 158. The front seat section 116 is attached to the front support rod 178, and the front support rod 178 rotates at the tie rod pivot 172 so that when the lifting mechanism is transformed from a sitting mode to a standing mode, the front seat section 116 can face each other The rear seat support section 160 is folded down around the pivot 122, for example, as shown in FIG. 7.

The seat sections 116, 118, 120 of the seat 114 are individually attached or incorporated into the lifting mechanism 104. The cushion assembly of the front seat section 116 is attached to the front seat support section 158 of the lifting mechanism 104. The cushion assembly of the rear seat section 118 is attached to the rear seat support section 160. The wedge-shaped part of the middle seat section 120 is attached to the middle seat support section 162. The middle seat support section 162 can be a parallelogram link 130 or a fixed attachment 150 to one of the parallelogram links 130. The cushion portions of the seat sections 116, 118, 120 may be integrated with the seat support sections 158, 160, 162, or attached to their respective seat support sections. Figures 3, 5, and 7 show the cushioned portions of the seat sections 116, 118, 120 with cushions attached to the seat support sections 158, 160, 162, respectively. When the parallelogram link 126 pivots about the pivot axis 138, the extension 150 remains substantially parallel to the ground, and therefore, the seat section 118 directly or indirectly attached to the extension 150 also remains substantially parallel to the bottom surface. The extension 150 is not necessarily integrated with a parallelogram link or directly attached to a parallelogram link. The extension 150 only needs to move in a fixed relationship with the parallelogram connecting rod. There may be additional components between the extension 150 and the parallelogram link 126 or other parallelogram links. The condition is that the extension 150 maintains a fixed angle to the ground during lifting or lowering, so a seat can be attached to the extension 150 and maintain a fixed angle. In the illustrative embodiment, the extension 150 is a seat.

The lifting mechanism 104 can be adjusted to accommodate passengers of different weights. FIGS. 13A to 13B and FIGS. 15A to 15B show the lifting mechanism 104 adjusted to the highest occupant weight adaptability for this illustrative embodiment. FIGS. 13A to 13B and 14 show the lifting mechanism 104 in a standing mode, and FIGS. 15A to 15B and 16 show the lifting mechanism 104 in a sitting mode. FIGS. 17A to 17B and FIGS. 19A to 19B show the lifting mechanism 104 adjusted to the minimum occupant weight adaptability for this illustrative embodiment. Figures 17A to 17B and Figure 18 show the lifting mechanism 104 in a standing mode, and Figures 19A to 19B and Figure 20 show the lifting mechanism 104 in a sitting mode.

FIG. 13A is a cross-sectional view through the section 13-13 of FIG. 14, thus showing a side view of the lifting mechanism 104 and a cross-section of the front seat section 116, the rear seat section 118 and the middle seat section 120. Fig. 13B is an enlarged view of part V of Fig. 13A. As mentioned above, FIGS. 13A, 13B, and 14 illustrate a lifting mechanism in a standing mode adjusted to a maximum adaptability relative to the weight of the occupant. In the embodiment shown in the figure, the mechanism for adjusting the lifting mechanism 104 to adapt to occupants of different weights includes a pivot 144 that can be adjusted in position along the slot 156 to control the lifting efficiency. The spring pivot 144 is shown in the frontmost or lowest position in the slot 156. The “spring pivot 144” is generally used herein, and the “spring pivot 144” may be in the form of an axle extending through the slot 156.

The spring 142 pivots at the spring pivot 152 relative to the extension 150. The position of the spring pivot 152 is fixed relative to the extension 150, however, the spring 142 can rotate around the pivot 152. The position of the extension 150 and the parallelogram connecting rod 126 also have a fixed relationship. Therefore, the position of the spring pivot 152 relative to the parallelogram link 126 is also fixed. Regardless of the height or whether the lifting chair 100 or lifting mechanism 104 is in the sitting mode or standing mode, even when the parallelogram links 126, 128, 130, 132 pivot about the parallelogram pivots 134, 136, 138, 140, this Keep the geometric structure unchanged. This relationship is maintained regardless of the weight of the occupant.

When the spring pivot 144 is positioned toward the rear of the lift chair 100 or the lift mechanism 104 in the slot 156, such as shown in FIGS. 19B and 20, the virtual lift lever arm will be shortened and the lift power will be minimized, and the spring 142 The lifting action caused by the movement of the upper parallelogram frame 124 will be more flexible. This position will generally be more suitable for an occupant with a lower weight. When the spring axle is placed closer to the front of the lifting chair 100 or the lifting mechanism 104 along the slot 156, the power will be maximized and the lifting caused by the action of the parallelogram frame 124 on the spring 142 will be less elastic. This is beneficial for a occupant with a heavier weight. As used herein, "equal elasticity" means that the elasticity is constant during the course of the lifting mechanism. It is not necessary to achieve or expect perfect elasticity, but relative elasticity can be affected by the adjustment mechanism. Theoretically, in the entire process of the lifting mechanism, the weight of the occupant should be balanced by the force of the spring. However, for a rider with a heavier weight, it is desirable to have a dynamic change at the beginning or end of the journey compared to the rest of the lifting journey.

The spring pivot 144 can be adjusted along the slot 156 by rotating the adjustment knob 180. The slot 156 is strategically positioned on the parallelogram frame 124 relative to the position of the parallelogram pivot 144 to obtain the best or beneficial elasticity. The position of the pivot 144 in the slot 156 relative to the pivot 138 determines the efficiency of the spring angle, and therefore the force exerted by the spring relative to the parallelogram frame 124. In an exemplary embodiment, the spring pivot 144 in the slot 156 is displaced from the position of the parallelogram pivot 138. When the spring 142 is perpendicular to the slot 156, the adjustment of the spring pivot along the slot 156 will usually be the simplest.

In the illustrative embodiment shown in FIGS. 1-24, the lifting mechanism 104 is symmetrical, so when viewed from the opposite side, the components identified in the side view can be repeated. The embodiment also includes a structure having a single parallelogram, a spring structure, or a single support component, such as shown in FIG. 65.

In an illustrative embodiment of the lifting mechanism 104, the aspect ratio of the sides of the lifting parallelogram 124 is relatively low. Even when adjusted to the maximum lifting power, a particularly large amount of elastic force is applied to a relatively short "lever arm" which is connected to a link group or one side of the parallelogram 124 or is fixedly attached to the parallelogram 124 A connecting rod group or an extension on one side. In an illustrative embodiment, the aspect ratio is 6:1 or approximately 6:1. See Figures 25 to 29 for an example of a virtual lever arm 402.

When adjusting to the lowest lifting force, for example, by adjusting a pin and a hole or a pin or similar component that can slide in a slot to adjust to the lowest lifting force, these lever arms are still relatively short-length Reduced by up to 80%, and produce up to 24:1 aspect ratio. An illustrative aspect ratio ranges from 6:1 to 24:1. For example, the optimal aspect ratio may depend on the lifting power of the elastic member and the lever arm. The elastic member in any of the lifting mechanisms described herein may be a spring, such as, for example, a gas spring. For the sake of simplicity, the elastic component may be referred to and shown as a spring or a gas spring, however, other elastic components may be used.

The illustrative lifting angle of the lifting mechanism 104 will now be explained. In addition, this illustrative embodiment will show that under any lifting adjustment (from weakest to strongest), when the spring is fully extended, the seat 114 or other payload can rise to the same altitude. This feature is very desirable because the elevated seat itself presents a uniform height, rather than protruding higher and forward for lighter users.

Figures 25 to 29 show the measured values related to the lifting mechanisms 104, 350 (350 will be described below) obtained at various heights and under various adjustment conditions and similar to the lifting mechanism 602. The measured values include a lifting angle 394, a slot angle 396, the distance between the parallelogram pivots 354 and 358 or the distance between the parallelogram pivots 352 and 356 (this is therefore the same distance from each other), and the parallelogram The distance between the pivots 356 and 358 or between the parallelogram pivots 352 and 354 (this is therefore equal to each other at equal distances), and the distance between the lift spring terminating pivot 366 and the main pivot 352. Although called a "slot angle", the angle can be related to a series of holes. The distance between the parallelogram pivots 354 and 358 or between the parallelogram pivots 352 and 356 will be referred to as the parallelogram short link length 398, and the distance between the parallelogram pivots 356 and 358 or the parallelogram pivot 352 The distance between and 354 will be referred to as the parallelogram long link length 400. The distance between the lift spring end pivot 366 and the main pivot 352 will be referred to as the end pivot distance 402.

The lifting angle 394 is the angle between the line connecting the upper lifting spring pivot 364 and the lifting spring terminating pivot 366 (ie, the spring axis 148) and the line connecting the lifting spring terminating pivot 366 and the main pivot 352. The line 402 between the lift spring termination pivot 366 and the main pivot 352 acts as one of the "virtual lever arms" or "lever arms" on the parallelogram 382. The slot angle 396 is the angle between the line connecting the upper lifting spring pivot 364 and the lifting spring terminating pivot 366 and the line along which the lifting spring terminating pivot 366 can be adjusted in the slot 368. The slot angle 396 only illustrates the potential path for the lift spring to terminate the pivot 366 when the length of the lever arm 402 changes.

FIG. 25 shows an illustrative embodiment in which the parallelogram is horizontal or substantially horizontal. A 2.27'" lever arm 402 is shown with a lift angle 394 of 115°. The descriptive range of the lever arm length position includes 1.0 inch to 4.0 inch and 2.0 inch to 3.0 inch. Illustrative adjustments include 0.75 inches to 1.25 inches and 0.9 inches to 1.0 inches.

For the seating configuration of the chair cushion, as shown in Figure 25, this tilt and lift angle sufficiently reduces the effective spring force to produce the equivalent elasticity or closeness of the chair cushion at or near the lowest position of the chair cushion Equal elasticity.

As can be seen, for example, in FIG. 26, the lifting mechanism 104 lifts the rear seat section 118, while the rear seat section 118 is kept substantially horizontal or in a lower position relative to it by means of the horizontal extension 150. The horizontal plane is kept at a selected angle. The lifting mechanism 104 also moves the seat 114 forward. When transitioning to a standing mode, the front seat section 116 tilts downward as the middle section 120 moves away from the position that supports the front seat section 116 and the rear seat section 118 when positioned in the sitting surface. If the seat 114 is moved backward, the optimal lifting angle may be different. Compared with the lifting force that can be required when lifting backwards, forward lifting usually requires less lifting force, because the user of the lifting chair 100 will have its weight fully or almost completely carried on it when it reaches a lifted position. The feet are not still greatly supported, such as in situations that can cause the user to lean on the backrest and lift backwards.

In an illustrative embodiment, a lifting force between 50% and 70% of a user's weight is used. For example, this range can be suitable for use with a lifting chair with an armrest that the user can push down. In the absence of armrests, the optimal lifting force can be greater, for example, 70% to 95% of the weight of an occupant, or greater.

Figure 26 shows the lifting mechanism 104 at its highest parallelogram course. In the case of the same 2.27’’ lever arm, the lifting angle 394 is reduced to 61°. In this embodiment, the most efficient (90˚) angle is a little bit higher. This is suitable for lifting the parallelogram "forward" because the lifting capacity may need to be reduced when approaching its highest position.

When the lifting mechanism 104 is at its highest position, the inclined lifting angle 394 reduces the force sufficiently, so that the effective load lifting force is equalized or close to equalization, and therefore "equal elasticity" or close to "equal elasticity".

Figure 26 shows a slot angle 396 of 89°, which significantly deviates from the lever arm lift angle of 115°. The slot angle 396 is selected because the slot angle achieves a full extension of the travel of the spring 142 under similar elevation, regardless of the adjusted position in the slot 156. In fact, if the slot 156 is curved (and a lead screw on a pivot), all positions along the slot 156 can be consistent with the final extension of the spring 142, and therefore the seat 114 will be produced under any lifting adjustment. The same height.

Figures 27 and 28 show the low history and high history of the parallelogram 382, respectively. Figures 27 and 28 illustrate the resulting elevation angle 394 obtained between the lever arm 402 and the spring axis 148 when the elevating member is adjusted to the lowest position (where the spring pivot is placed as far as possible to the rear of this embodiment). Note that in the seated position, the spring 142 is lifted against an efficient close to 90° lever arm 402 at a lifting angle 394 of 97°.

In the high "stepping off" position, as shown in Figure 28, note that with the lowest adjustment along one of the slots 156, the lifting angle 394 is an inefficient 45°, which prevents the seat 114 from being too Push forward too. This is important; not only pushing the occupant away from the chair may cause injury, but the force required to start the seat/cushion lowering may also cause the entire chair to move back when a potential user approaches.

Illustrative embodiments (for example, those shown in FIGS. 25-28) have a lifting mechanism 104 under the seat 114. This same lifting geometry can be used to lift a seat/cushion, where the lifting mechanism is divided into two cooperative lifting parallelograms positioned on either or both sides of the lifting chair, for example, such as shown in Figure 29 to Figure 32 Displayed. The lifting mechanism 104 incorporates a central spring 142 or an adjacent spring group arranged between two parallelograms 124. Although the lifting mechanism 350 may include two springs 362 on opposite sides of the lifting mechanism 350, each spring being associated with a parallelogram 382, the lifting mechanism 350 may utilize a single spring 362 associated with a single parallelogram 382. structure.

The rear end blocks 422 of the parallelogram 382 are interconnected by a horizontal tube or rod 426, such as shown in FIGS. 35 and 36. A flange to support the back pad may be included, such as the portion 359 shown, for example, in FIG. 35. It should be noted that the spring 362 may be the same type as the spring 142.

The pivots of the parallelogram 382 are designated as 352, 354, 356, 358, and the main pivot is designated by the reference number 352, but it will be understood that the configuration of the parallelogram linkage and the adjustment mechanism may be different from that disclosed herein Examples of other lifting mechanisms.

In the embodiment of the lifting mechanism 350, when the seat 410 is in a sitting mode, the base frame 406 includes forward parallelogram end blocks 408 on the left and right sides of the cushion. The middle seat support section 120 is fixed to one of the base frames 406 and the transverse connection bottom surface 412. The lateral connection bottom surface 412 connects the side walls 414 and 416 to the base frame 406. Although pads are mentioned, similar lifting mechanisms with sitting and standing modes can be constructed without pads, but instead provide any surface sufficient to support a user in a fairly comfortable manner. Also note that the pad can be integrated with the lifting mechanism support section. "One-piece" means that the cushion is permanently or removably fixed to the seat support section of the lifting mechanism.

In a cushioned version of one of the embodiments of the lifting mechanism 350, in the sitting position, the middle seat section 120 is also used to fill the folding cutout adjacent to the interface between the front seat section 116 and the rear seat section 118. Unlike other disclosed versions in which the lifting mechanism 350 is placed below the middle of the seat 114 and the middle section 120 must be raised when the parallelogram rises, the lifting parallelogram 382 is not obstructed on both the left and right sides and allows the middle seating area The segment 120 remains fixed in position relative to the bottom surface 412 of the transverse connection. The "raised parallelogram 382" means that the components of the parallelogram 382 can be raised, but not necessarily all parts will be raised. For example, in FIG. 26, the pivot 354 is held in place, and a part of the lowest link of the parallelogram 382 may even extend below its original position.

FIG. 29 shows a lifting mechanism 350 with a series of arcuate holes 424 for adjusting the position of the spring end 366 when the connecting rod of the parallelogram 382 is horizontal (here in an illustrative seating position). When the spring 142 is fully extended, instead of the slot 368, the arc of the hole 424 has a radius equal to the length from the spring end point to the spring pivot 364. Although the hole 424 forms an arc, the center of the hole can be used to closely approach the point that defines a ray that defines a slot angle 368. Therefore, FIG. 29, FIG. 31, and FIG. 32 show the slot angle 368 for approximate comparison with the configuration having an adjustment mechanism including a slot 368. In the illustrative embodiment of FIG. 29, the "slot angle" 396 is 150°. The length of the lever arm 402 is illustrated as 2.27" and the lifting angle 394 is 115°. Here, the lifting angle 394 is at the lower parallelogram pivot 352 and the second farthest hole from the rear (the farthest hole will provide additional lifting ) Between the expansion. Regardless of which hole the lift spring termination pivot 366 is located in, the slot angle 396 is the same.

Since the spring pivot 364 is only at the center of the arc of the hole 424 when the spring 142 is fully extended, the effective lifting force can be adjusted only when the spring 142 is fully extended by changing the position of the hole of the lift spring terminating pivot 366 Time. This is illustrated by comparing FIG. 29 and FIG. 30. In Figure 29, the lifting mechanism 350 is in its lowest position, and the spring 142 is compressed. The spring pivot 364 is not at the center of the arc along which the placement hole 424 follows. Therefore, in the lowest mode, the spring 142 cannot rotate and align with each of the holes 424. Figure 30 shows the lifting mechanism 350 in its highest position. The spring 142 is fully extended, and the spring pivot 364 is at the center of the arc along the placement hole 424. In this configuration, the spring 142 can rotate about the spring pivot 364 and will align with any of the holes 424, and therefore, a lifting force adjustment can be made.

Figure 30 shows the lifting mechanism 350 in a raised position. The rear seat section 118 is maintained in a horizontal position by the horizontal extension 359. The extension 359 can also be designed to maintain a predetermined or selected angle with respect to the horizontal plane. The extension 359 operates in a manner similar to the extension 150. When the front seat section 116 and the rear seat section 118 move away from the fixed middle seat section 120, the front seat section 116 is free to descend downward to allow a user to move into a standing position. The front seat section 116 and the rear seat section 118 may be connected by a hinge made of rigid or soft material or a combination of two types of materials. For example, a fabric (such as cloth, leather, or vinyl) may connect the front section 116 and the rear section 118 and allow the front section 116 to descend downward while remaining attached to the rear section 118. Additionally or alternatively, in an illustrative embodiment, a pivot may be used, such as pivot 122 shown in FIG. 5. It should be noted that for the sake of simplicity, the front seat section 116, the rear seat section 118, and the middle seat section 120 include any cushioned, cushioned or base components, but these individual components can also be individually identified. The seat 114 includes a front seat section 116, a rear seat section 118, and a middle seat section 120.

The holes 424 can be incorporated into the rear end block 422 on either side of the lifting mechanism 350. Alternatively, a hole 424 can be used on one end block 422, and a slot and peg can be used on the opposite end block 422. See FIG. 42 for an illustrative spring wheel axle pin 432. Alternatively, if only one parallelogram 382 lifting structure is used, a series of arcuate holes 424 are used on a single end block 422. In this embodiment, the radius 428 of the arc of the hole 424 extends from the spring (elastic member) pivot 364 to the lifting spring terminating pivot 366 that coincides with a selected hole 424. In an illustrative embodiment, when the parallelogram 382 is raised to its maximum height, the radius 428 is equal to the distance from the center of the pivot 364 of the one or more fully extended springs 362 to the center of the pivot 366 of 10.5 inches. An illustrative radius range is 9 inches to 12 inches.

It can be adjusted effectively by pulling a spring wheel axle pin 432 out of the selected hole 424 and swinging the spring 362 upward toward a more forward hole (stronger) or downward toward a more backward hole (weaker) to another hole 424 Lifting power. For the configuration with the spring 362 on the opposite side of the lifting mechanism 350, since the spring on the opposite side still keeps the seat/cushion at the same height, the hole 424 remains aligned to allow the spring wheel pin 432 to be inserted into any position. In a hole. Then, the opposite side spring wheel axle pin 432 can be repositioned, while the proximal side spring wheel axle pin keeps the seat/cushion at the maximum height. This alternate two-sided adjustment procedure provides a vernier effect because the adjustment made by a hole on one side only produces half the lift change when repositioning the two spring wheel axle pins 432. This feature can provide a convenient way to select a sufficiently fine adjustment within a wide range of boost settings.

FIG. 31 shows the effect of the lowest lift position of the spring wheel axle pin 432 (that is, the rearmost hole position) on the lift angle 394 relative to the spring axis 148. At the rearmost position, the spring 362 is powered against a relatively short 1.56" lever arm 402, thereby advancing at an inefficient lifting angle 394 of only 39° to counteract the reduction in the aspect ratio of the lifting triangle. Deviation from equal elasticity. The three sides of the "lifting triangle" include: 1) the length of the spring 362, that is, the distance from the lifting spring pivot 364 to the lifting spring end pivot 366; 2) from the lifting spring end pivot 366 to the main pivot 352 And 3) the distance from the autonomous pivot 352 to the lifting pivot 364. This adjusting mechanism generates an almost 2:1 change of one of the lifting powers from the most front hole 424 to the most rear hole 424.

It should be noted that the specifications provided for the lift angle, slot angle, and lever arm length are only for illustrative embodiments. For example, these specifications can be changed to suit users of different weights and abilities.

In a chair with a lifting mechanism 350, the effective lifting power can be selected to allow an occupant to supplement his own ability to stand up from a sitting position. For example, with an illustrative spring force of 3200 N at a 50% progress rate, this adjustment range should be able to lift approximately half the weight of a person between 100 lbs. and 200 lbs. and make A person easily stands up from a low armchair or other equipment or furniture containing the lifting mechanism 350. An illustrative spring force range is 3000 N to 3500 N. One of the explanatory force progression ranges from full extension to full compression is 45% to 55%. In an illustrative embodiment, the spring 362 has a stroke range of 75 mm to 85 mm and an uncompressed length in the range of 200 mm to 275 mm. For example, the spring 362 may be a compression spring, such as a gas spring. Other illustrative spring types include tension springs (which will need to be deployed oppositely on a parallelogram to provide the same lifting force).

In this illustrative embodiment, suitable small diameter gas springs (for example, in the range of 23 mm to 28 mm diameter) can be fitted in the narrow parallelogram mechanism on the left and right sides of the folding pad. When the rear seat section 118 is raised, the rear seat section 118 can be attached at its rearward edge to a loose cushion fabric cover (not shown), which will also be attached to the lower part of a seat back The edge makes the lifting mechanism hidden and protected even in the elevated state.

Figure 32 shows the effect of the lowest lift position of the spring wheel axle pin in the rearmost hole position on the lift angle relative to the spring axis, thereby providing a lift angle 394 of 98° and a "slot angle" 396 of 153°.

Figure 29 shows an illustrative geometry of the lift mechanism 350, where at the illustrative lever arm length 402 of 2.27', the lift spring termination pivot is in the frontmost hole and the mechanism is in the seated position.

As shown in FIG. 33, in order to control or assist in controlling the position of the seat section 116 before the raised seat 410, a restriction panel 404 may be included. The restriction panel 404 may be attached between the lower forward edge of the front seat section 116 and a suitable point (in this illustrative case, the apex of the middle seat section 120) so that the restriction panel 404 keeps the front seat section Fold down fully and will not hinder the knees of the occupant during the entire upward and downward journey of the seat 410. In an illustrative embodiment, the restriction panel 404 may be a non-stretching material of cloth or other flexible materials.

Fig. 25, Fig. 29 and Fig. 31 show the illustrative height 392 of the seat surface from the ground, and the illustrative height includes 13.28 inches, 5.83 inches, and 18.24 inches, respectively. The 5.83 height depicted in FIG. 29 corresponds to the sitting height, and the height depicted in FIG. 31 corresponds to a raised height. Since the thickness of the cushion can be changed and the disclosed lifting mechanism can be configured to be used without a cushion, the important distance is the height change of the sitting surface from the lowest position to the highest elevated position. The descriptive vertical distance position from sitting mode to standing mode changed from 8 inches to 16 inches and 11 inches to 13 inches.

Fig. 33 shows a restriction panel 404 extending between points or edges "A" and "B". The points or edges "A" and "B" are selected so that the restriction panel 404 performs a restriction function and can remain tensioned throughout the entire process of the lifting mechanism 350 and located under the seat 410 in a seating position.

Figure 34 shows a diagram of the position of the restraining panel 404 when the seat is in its lowest position.

FIG. 35 shows an isometric view of the lifting mechanism 350 and the seat 410 in a raised position. In this illustrative embodiment, the restriction panel 404 has an accessory length along the lower forward edge of one of the front seat sections 116 and along the peak of the middle seat section ("wedge") 120.

The relative lift parallelogram 382 with an incremental "hole" adjustment mechanism 430 allows the spring wheel axle pin 432 to be removed from both sides, and allows the front seat section 116 and the rear seat without a compression spring extending beside the lowest hole The section 118 lays flat or as designed so as to form a seat 410 that looks or "appears" like a conventional chair cushion when needed. This configuration is also suitable for transferring and repositioning the lifting mechanism to a different chair or other equipment.

In an illustrative embodiment, the setting and restoration of this lift chair mode will only need to lift the rear seat section 118 until a spring wheel axle pin 432 can engage the spring cap 434 through any hole 424, and then on both sides The spring wheel axle pin 432 is alternately repositioned to achieve the desired lift amount.

FIG. 36 shows an isometric view of the lifting mechanism 350 when the seat 410 is in a folded mode to obtain additional visual effects of the device. As mentioned above, the rod 426 connected to the relative lifting mechanism 350 is shown. The rod 426 can provide support for the equipment and maintain the position of the relative lifting mechanism 350 relative to each other. If there is only one lifting mechanism 350 in the lifting device, the rod 426 can still provide structural support and maintain the integrity of the relative positions of the frame components or other parts on the opposite side.

FIG. 37 shows an illustrative embodiment of a lifting mechanism 502 having a linearly adjustable spring-terminated pivot 504. The spring terminated pivot 504 can be adjusted along the slot 506. The slot angle can be increased or decreased by a conventional lead screw (for example, a lead screw rotated by a folding crank 508). FIG. 37 shows an embodiment with a linear slot 506. The slot can also be arc-shaped, wherein the remaining lifting mechanism components are appropriately modified to allow the spring terminating pivot 504 to be adjusted using the arc-shaped slot.

The lifting mechanism 502 includes an extension portion 524 to maintain the angle of the rear seat section 118 similar to the extension portions 150, 359, and 616.

38 and 42 are isometric views of the lifting mechanism 502 shown in FIG. 37, in which one side of the rear end block 522 is rendered transparent. FIG. 39 further illustrates the spring termination adjustment mechanism 520 (also referred to as the "lifting force adjustment mechanism"). FIG. 38 shows a lead screw 510 placed between the two sides of the end block 522. A movable nut 512 can move along the lead screw 510 to adjust the position of the spring end pivot 504. The movable nut 512 has a one-piece transverse axle 514 that engages the yoke 516 (to facilitate installation) on each side. The spring-terminated pivot 504 is also engaged in the yoke 516 or a component attached to the yoke 516. The positioner screw 518 clamps the integrated transverse axle 514. The folding crank 508 for adjusting the position of the movable nut 512 is shown in a folded position.

Deploying and rotating the crank 508 will cause the attached lead screw 510 to rotate, causing the movable nut 512 and the stuck spring terminating pivot 504 to move the lead screw 510 up or down between the minimum and maximum lift positions. . Equivalent lifting force adjustment mechanisms 520 can be used on the left and right sides of the device. Each lifting force adjusting mechanism 520 can be individually adjusted to achieve lifting, and advantageously, each lifting force adjusting mechanism 520 can be adjusted to substantially multiple positions along its respective slots. Therefore, this version can provide cursor (continuous) adjustment instead of incremental adjustment.

Except for the straight slot and a series of arcuate holes, the lifting geometry of these embodiments may be the same or substantially the same. The incremental hole adjustment mechanism 430 and the linearly adjustable spring termination pivot 504 can be used in the lifting mechanism 350 respectively. The lifting angle relative to the spring axis and the weak lifting position and the strong lifting position at the ray defining the slot angle (which effectively adjust the aspect ratio of the lifting triangle operating in the parallelogram linkage group) can be functionally the same.

Alternate lifting geometry can be used for the lifting mechanism. The best lifting angle 394 relative to the spring axis 148 and the slot angle 396 defined above can also be effectively implemented to apply force between various other links of the lifting parallelogram 124, 382 and its inner and outer elements . The lifting mechanisms 104, 350, and 502 apply lifting force between the rear end blocks 170, 422 (or the inner extension of the rear end block) and the relatively lower parallelogram link.

However, the lifting mechanism 602 illustrated in FIGS. 40 and 41 has an alternate lifting geometric structure that operates according to the same principle as that described above. The spring exerts a force between the base and the rising lower link. FIG. 40 is an isometric view of the lifting mechanism 602 without the seat cushion attached, except for a supporting wedge (middle seat cushion) 120 shown on the fixed frame base 610. FIG. 41 is a side view of the lifting mechanism 602 shown with the seat cushions 116 and 118 attached. FIG. 40 and FIG. 41 show the parallelogram 604 with the adjustment mechanism 606. The adjusting mechanism 606 is positioned at one end of the connecting rod 608 of the parallelogram 604 that remains connected to the fixed frame base 610 when the lifting mechanism is raised. When the lifting mechanism 602 is raised or lowered, the angle of the extension 616 relative to the horizontal plane remains unchanged or the extension 616 is maintained at a level.

The adjustment pivot pin 612 is inserted into the lowest of the holes 614 on the relative lift mechanism 602, resulting in the shortest possible lever arm (and therefore the lowest aspect ratio lift triangle) for this illustrative version. The other details of this lifting geometry are the same as in the illustrative embodiment set forth above.

When the gas spring is fully extended, it is easier to adjust most or all of the disclosed lifting mechanism. When the end of the spring swings along one of the best and continuous arcs for incremental lifting adjustment or along a continuous adjustment mechanism, only a single geometric structure provides sufficient performance.

In an embodiment that follows the same design as the illustrative embodiment but is rotated (for example) so that the spring 142 or 362 protrudes toward the rear of the lifting chair 100 or the lifting mechanism 104, 350 or 602, the stated structure can be achieved effect. For example, see Figure 40 and Figure 41.

The disclosed lifting mechanisms 104, 350, 602 and their inverted configurations (such as those described in the previous paragraph) can be used as a lifting device for equipment other than the illustrated chair, for example, a wheelchair or chair lift, such as at March 29, 2018 made the title of the application is "to enhance the walking chair, lifting mechanism and seat (Elevating Walker chair, lifting mechanism and seat) ," US patent application of the subject 62 / 649,746, which is US patent application of The content has been incorporated into this article. The lifting device can also be used in chairs that have been incorporated into other systems such as vehicles or machines.

The figures show parallelograms 124, 382, 604 with four links, but a similar lifted parallelogram can be constructed with fewer links or links of different shapes.

Figures 43 to 56 show an illustrative lifting walking chair 700 into which any of the lifting mechanisms disclosed herein can be incorporated. The elevated walking chair 700 has a sitting mode and a standing or walking mode. In the sitting mode, the seat or seat 718 is in a lowered position, and in the standing or walking mode, the seat 718 is raised to allow an occupant in Walk while being supported by the elevated walking chair.

FIGS. 43 to 56 show a lifting mechanism similar to the lifting mechanism 350 with springs on the opposite right/left side of the lifting walking chair 700. Other lifting mechanisms (such as the double spring lifting mechanism 602, or the single spring lifting mechanism 104) can also be incorporated into a chair lift.

As can be seen most clearly in FIGS. 49C and 50C, the lifting mechanism 736 includes a parallelogram structure 738, and the parallelogram structure 738 includes a connecting rod 759 parallel to the connecting rod 756. The components of the end block 734 and the frame 702 form the other "links" of the parallelogram 738. The parallelogram links 756 and 759 pivot at the pivots 745 and 746 on the end block 734. The parallelogram links 756 and 759 further pivot at the pivots 747 and 749 on the frame 702. Although the term "parallelogram" is used for the structure 738, it should be noted that the connecting rods 756, 759 need not be straight and completely parallel, but the straight lines connecting the pivots 745, 746, 747, 749 form a parallelogram.

Figure 43 is a front isometric view of the chair lift 700 in a lower sitting mode. The chair lift 700 has a frame 702 to which various components are directly or indirectly attached or integrated with the frame. In the illustrative embodiment of FIG. 43, the frame 702 includes wheels 706 attached to the lower frame assembly 704. The frame 702 includes a backrest assembly 708 attached to the lower frame assembly 704 and extending upward from the lower frame assembly 704. The armrest 710 is attached to the backrest assembly 708. The optional foot pedal 788 is attached to the frame 702 at the foot pedal pivot 790. The footrest 788 can have two or more standard positions, for example, the folded position as shown in FIGS. 43 to 46, and pivots to accommodate the feet of a user when sitting down 90° position. A pedal rotation mechanism for restricting the rotation of the pedal 788 at the pivot 790 may be adopted, such as the rotation restriction stopper at one of the two positions described above. Can include other pedal rotation mechanisms that provide additional position options.

The wheel 706 can be incorporated into the chair lift 700 via two-state casters, such as described in the international patent application PCT/US2017/060163, which was filed on November 7, 2017 and incorporated by reference In this article.

The frame 702 has a maximum height adjustment mechanism 712. In the illustrative embodiment shown in FIG. 43, the maximum height adjustment mechanism 712 includes a height adjustment rod 714 having a series of height adjustment holes 716 for selecting the height of the seat 718. A maximum height adjustment pin 720 can be inserted into one of the series of height adjustment holes 716 to lock at a desired height. The maximum height adjustment mechanism 712 and procedures will be described in more detail below. The maximum height adjustment mechanism 712 can provide both support functionality and height adjustment functionality.

As can be seen in FIGS. 43 and 48, the height adjustment rod 714 is slidably disposed in a height adjustment sleeve 754. The height adjustment sleeve 754 is attached to a parallelogram structure 738 at the connecting rod 756. Therefore, when the angle of the parallelogram 738 is changed to raise or lower the chair lift 700, the height adjustment sleeve 754 moves the height adjustment rod 714 up and down. When the chair lift 700 is raised, the height adjustment pin 720 restricts the height adjustment sleeve 754 along the height adjustment rod 714. As can be seen in Figure 48, if the height adjustment pin 720 is in the highest hole of the height adjustment hole 716, or if the height adjustment pin 720 is not inserted into a hole, when the lift chair 700 is at its highest possible height, the height adjustment sleeve The barrel 754 can be raised to the highest possible position on the height adjustment rod 714. By inserting the height adjustment pin 720 into a lower hole, the chair lift 700 is restricted to a lower maximum height.

The sleeve 754 may have internal wheels to facilitate sliding along the height adjustment rod 714. Other components for improving sliding can be used alone or in conjunction with wheels, for example, materials such as Teflon®, ball bearings or other conventional mechanisms.

In addition to setting a maximum height by inserting the height adjustment pin 720, the height of the seat 718 can be set at a specific intermediate height between the minimum height range and the maximum height range. An intermediate height adjustment mechanism 760 can be used to set the height adjustment sleeve 754 at an intermediate position along the height adjustment rod 714. For example, the height adjustment sleeve 754 can also be associated with a component used to fix it along the height adjustment rod 714, such as can be withdrawn from one of the height adjustment holes 716 and reinserted into one of a different hole Spring loaded or non-spring loaded pin. Other forms of intermediate height adjustment mechanism 760 can be used. Generally speaking, the intermediate height adjustment mechanism 760 provides a member for temporarily fixing the height level of the height adjustment sleeve 754 along the height adjustment rod 714.

FIGS. 58A to 58B and FIGS. 59A to 59B show an illustrative middle height adjustment mechanism 760. FIG. 58A illustrates the lifting of the walking chair 700 when the intermediate height adjusting member 760 and the seat 718 are in their lowest positions. FIG. 58B is a close-up of detail K from FIG. 58A before selecting a height of the seat 718. FIG. 59A illustrates the lifting of the walking chair 700 when the intermediate height adjusting member 760 and the seat 718 are fixed at a selected height. FIG. 59B shows a close-up of the detail L from FIG. 59A of the intermediate height adjusting member 760 joined to fix the height of the seat 718. FIG. The middle height adjustment mechanism 760 includes a middle height adjustment pin 770 that can be inserted into a sleeve hole 772 in the sleeve 754. The sleeve 754 can move along the height adjustment rod 714 until the sleeve hole 772 is aligned with a selected one of the height adjustment holes 716 in the height adjustment rod 714. Then, the middle height adjustment pin can be inserted through the sleeve hole 772 and inserted into the selected hole of the height adjustment hole 716 to fix the height of the seat 718. Other conventional members for adjusting the parallelogram link 756 along the height adjustment rod 714 can be used as an intermediate height adjustment mechanism.

FIGS. 64A to 64B illustrate the height adjustment sleeve 754 attached to the end block 734 instead of the parallelogram structure 738 (such as shown in FIG. 56) at the connecting rod 756. Fig. 64B is an enlargement of the area Q of Fig. 64A. The height adjustment sleeve 754 can be attached to various components of the parallelogram structure 738. By registering the height adjustment sleeve 754 to the lifting mechanism, the height of the seat 718 can be controlled.

Although a height adjustment "sleeve" is mentioned, other configurations that allow an adjustment component to be slidably or otherwise moved up and down along the height adjustment rod 714 can be used. The “sleeve” does not necessarily completely surround the height adjustment rod 714. The middle height adjustment mechanism 760 may be configured to simultaneously adjust the right/left middle height mechanism. For example, a simultaneous middle height adjustment assembly may include a cable for coordinated right/left adjustment.

It should be noted that the "height adjustment" is different from the adjustment provided by the lifting mechanism 736 described below. The maximum height adjustment provides a maximum height in the range that defines the history of the lifting mechanism from a sitting mode to a standing mode.

Figure 44 is a rear isometric view of one of the elevated walking chairs 700. A folding mechanism 722 is incorporated into the illustrative embodiment of FIG. 43, and the folding mechanism 722 will be described in more detail with respect to FIGS. 60 to 63 below.

FIG. 45 shows an isometric view of the lift walking chair 700 in a lifted or standing position. In the raised position, a user can be supported by the seat/seat 718 while walking using leg strength and motion. A standing arm support 732 is provided. When the chair lift is in a raised position, the standing arm support 732 can adapt to a user in a comfortable and supportive manner. The support arm 732 is attached to the end block 734 of a lifting mechanism 736 so that when the lifting mechanism 736 raises the seat 718, it is also lifted. The support arm 732 may be configured to extend when the chair lift 700 is raised, or may be incorporated into the chair lift 700 for manual deployment.

57A to 57C show an illustrative arm support adjustment mechanism 768. FIG. 57A is a side view of an illustrative lift walking chair 700 with a support arm adjustment mechanism 768. FIG. Figure 57B is a detail of section O of Figure 57A. Fig. 57C is a cross-section of the arm support adjusting mechanism 768 taken through the line P-P of Fig. 57B. The standing arm support 732 is pivotally attached to the end block 734 at the arm support pivot 762. The arm support adjustment mechanism 768 locks the standing arm support 732 in a selected position. The arm support adjustment mechanism 768 includes a standing arm support adjustment pin 764, which can be positioned in the standing arm support adjustment pin recess 766 and drawn out from the standing arm support adjustment pin recess 766. The arm support adjustment pin 764 may be spring-loaded. When the arm support pin 764 is drawn out from the support pin recess 766, the standing arm support 732 can rotate around the arm support pivot 762. When the arm support pin 764 is inserted into the arm support pin recess 766, the standing arm support 732 is locked in the rotating position. When the arm support pin 764 is drawn out from the arm support pin recess 766, the standing arm support 732 can rotate around the arm support pivot 762. The standing arm support adjustment mechanism 768 may be included on both the right and left standing arm supports 732. Other conventional members for adjusting, locking and unlocking the angular position of the standing arm support 732 can be used as the standing arm support adjustment mechanism.

The lifting mechanism 736 has a parallelogram structure 738 with a spring 740, such as shown in FIG. 49C. The spring 740 and the parts of the parallelogram structure 738 together form a lifting triangle. The lifting triangle is composed of: a first side defined by the length of the spring 740 from a spring pivot 742 to a spring end point 744; a second side defined by a line from the spring pivot 742 to the main pivot 746 Side; and a third side of the autonomous pivot 746 to the spring end point 744. The position of the spring termination pivot 744 can be adjusted along a series of spring termination holes 748 to change the effective lifting force. Adjusting the position of the spring end pivot 744 will shorten or lengthen the third side of the lifting triangle, that is, the distance 750 from the autonomous pivot 746 to the spring end point 744, or the "lever arm" as occasionally mentioned in this article. The effective lifting force increases as the length of the lever arm 750 increases. The lifting force can be adjusted according to the weight of the occupant.

FIG. 46 shows an isometric rear view of the lifting walking chair 700 in a raised position.

Figure 65 shows an isometric view of a portion of a lift walking chair with a seat 718 attached to a single central lift mechanism 736. The seat 718 and the lifting mechanism 736 may be attached to a frame similar to the frame 702. A seat 718 with a central lifting mechanism 736 as shown in FIG. 65 can also be used in other equipment. Although the seat 718 is shown as a vehicle seat, which is advantageous for a raised walking chair system, the seat 718 may have other configurations compatible with the type of seating equipment in which the seat 718 is incorporated.

Figures 47A, 47B to 52A to 52B show an illustrative lifting adjustment procedure. If there is a relative lifting mechanism and an adjusting mechanism, the steps are performed on one side of the chair lift 700 first, and then the steps are performed on the opposite side of the chair lift 700.

Figure 47A and Figure 47B show the first step of the lifting force adjustment procedure. Fig. 47A is a front isometric view of a raised walking chair 700 in a raised position. FIG. 47B shows an enlargement of a detail A of multiple parts of a lifting adjustment mechanism 758, which is a part of the lifting mechanism 736. The lifting adjustment mechanism 758 includes a lifting adjustment pin 752 and a series of spring termination holes 748 arranged in the end block 734. First, remove the lift adjustment pin 752 from one of the spring termination holes 748. This allows the chair lift 700 to be raised to its maximum height position as shown in FIG. 48, thereby reducing or eliminating the force exerted by the spring 740 due to the spring 740 being at its maximum extension. When the spring pivot 742 is at the center of the arc, the spring termination hole 748 is also positioned along a circular arc, so the spring 740 can pivot into any of the spring termination holes 748. This is illustrated by comparing FIG. 43 and FIG. 45. In Figure 43, the lift walking chair 700 is in its lowest sitting position, and the spring 740 is compressed. The spring pivot 742 is not at the center of the arc along which the spring termination hole 748 is arranged. Therefore, in the sitting mode, the spring 740 cannot rotate and align with each of the spring termination holes 748. Figure 45 shows the lifting walking chair 700 in its highest standing position. The spring 740 is fully extended, and the spring pivot 742 is at the center of the arc along which the spring termination hole 748 is placed. In this configuration, the spring 740 can rotate about the spring pivot 742 and will be aligned with any of the spring termination holes 748, and therefore, the lifting adjustment can be achieved.

Recall that the "maximum height position" was determined by setting the maximum height adjustment mechanism 712. On the other hand, the lifting force adjusting mechanism 758 sets the force with which the lifting walking chair seat 718 is raised and lowered.

Figures 49A to 49C show the next step of the lifting force adjustment procedure. FIG. 49B shows a side cross-sectional view of the chair lift 700 taken through the line B-B of FIG. 49A, and the line B-B cuts through the spring 740. Figure 49C is an enlarged view of one of detail C of Figure 49B. Figure 49C shows the spring terminating pivot 744 in one of the spring terminating holes 748 forming the shortest lever arm 750 for this embodiment.

50A, 50B, and 50C are similar to FIGS. 49A to 49C, but are taken through the section D-D shown in FIG. 50A. Section D-D provides a side view of the spring 740 and the lift adjustment pin 752.

Figure 51A and Figure 51B illustrate the next lifting force adjustment step. Figure 51B is an enlarged view of one of detail F of Figure 51A. The lift adjustment pin 752 is removed from one of the series of spring termination holes 748. This allows the spring 740 to freely rotate about the spring pivot 742 into any of the other spring termination holes 748 to adjust the lifting force.

52A and 52B show the next step of the lifting force adjustment procedure. Fig. 52B is an enlarged view of one of detail G of Fig. 52A. The spring 740 has been rotated about the spring pivot 742, so the end of the spring 740 can be positioned to form a spring termination pivot 744 at a different hole in the series of spring termination holes 748. The lift adjustment pin 752 is inserted into a hole to form a spring terminating pivot 744. For example, this adjustment will enlarge the lever arm 750 compared to the length of the lever arm 750 shown in FIG. 49C. In other words, the distance between the spring terminating pivot 744 and the main pivot 746 is increased, and therefore, the effective lifting force is also increased.

Figure 53A, Figure 53B to Figure 56 illustrate a height adjustment procedure. Figure 53B is an enlarged view of one of the details H of Figure 53A. 53A and 53B show an initial configuration of the chair lift 700, where the chair lift 700 is positioned at its lowest height and the height adjustment pin 720 is in the highest hole of the height adjustment hole 716 on the height adjustment rod 714.

53A and 53B show the lift chair 700 in its lowest position when the height adjustment pin 720 is in the highest position. 54A and 54B show the first height adjustment step for changing the maximum height that the chair lift 700 can achieve for this illustrative embodiment. Figure 54B is an enlarged view of one of detail I of Figure 54A. The height adjustment pin 720 is shown as being removed from one of the height adjustment holes 716 into which it has been inserted.

55A and 55B show a height adjustment step under this illustrative embodiment. Figure 55B is an enlarged view of one of detail J of Figure 55A. Reinsert the height adjustment pin 720 into one of the lower holes of the height adjustment hole 716. This sets the maximum height of the chair lift 700 to a lower height level because the height adjustment sleeve 754 along the parallelogram connecting rod 756 is restricted by the height adjustment pin 720.

56 is a side view of the lifting walking chair 700, which shows the height adjustment pin 720 blocking the height adjustment sleeve 754 from rising completely along the height adjustment rod 714. This resists the lifting force of the spring 740 and limits the lifting walking chair 700 to the full height.

It should be noted that in the case where the lifting adjustment mechanism 758 and the height adjustment mechanisms 712, 760 are located on both sides of the lifting walking chair 700, the adjustment described herein may need to be implemented on both sides. In other embodiments, an adjustment mechanism may only exist on one side, provided that the lifting walking chair and the adjustment mechanism assembly are sufficiently durable to allow a unilateral mechanism.

Turning to FIGS. 60 to 63, the folding mechanism 722 included in the lifting walking chair 700 is shown as appropriate. Figure 60 is an isometric rear view of one of the folding lifting walking chairs 700. Fig. 61 shows a front view of a partially folded lift walking chair 700. Figure 62 is a rear isometric view of the lifting walking chair 700 in one of the folded positions. Fig. 63 is a front view of the lifting walking chair 700 in a folding mode.

The folding mechanism 722 includes a pair of lower cross-bars 724 and a pair of upper cross-bars 726 each connected to the central upright assembly 728 and foldable with respect to the central upright assembly 728. A locking mechanism 730 is provided for locking the structure of the chair lift 700 in an unfolded position for use and unlocking the structure of the chair lift 700 for folding. The locking mechanism 730 can also lock the lifting walking chair in a folded position. After the lower crossbar 724 and the upper crossbar 726 are folded toward the central upright 728, the seat 718 can also be folded upward manually or automatically.

In the illustrative folding mechanism 722, the lift walking chair 700 is in a sitting mode when folded, such as the mode shown in FIG. 44. In additional embodiments, the lifting walking chair 700 may be in a standing mode when folded. The locking can be initiated by pulling the locking mechanism 730 upward. The seat 718 can be folded by lifting up one side of the seat or lifting (if present) a handle 784 on the seat 718. The tie rod linkage group 786 is connected to the seat 718 at one end, and is connected to the frame 702 or attached to one of the components of 702 to maintain the connection of the seat 718 to the equipment, while allowing the seat 718 to be folded to accommodate the lifting of the walking chair 700. Fold the sides towards each other. The tie rod 786 may be slidably attached to the seat 718 and/or the frame 702.

The slot 774 in the upper cross bar 726 slidably receives the extension pin 776 of the bar 778. The guide rod 778 is pivotally fixed to the central upright assembly 728 at the central upright pivot 780 shown in FIG. 61. The center pivot 780 may be slidably secured to the center upright assembly 728 in the slot 782. When the extension pin 776 moves along the slot 782, the upper cross bar 726, the lower cross bar 724, and the guide bar 778 pivot and move toward the central upright member 728, and cause the back members 708 of the frame 702 to move toward each other. Fold the seat 718 upwards or downwards by approximately 90° to accommodate the lower frame assembly 704, armrests 710, and other components of the lifting walking chair to be folded toward the central upright assembly 728 in a folding manner.

Other conventional folding mechanisms 722 and locking mechanisms 730 can be incorporated into the lifting walking chair 700.

Various embodiments of the present invention each having a different combination of elements have been described. The invention is not limited to the specific embodiments or combinations disclosed. The present invention may include different combinations of disclosed elements, omission of certain elements, or replacement of elements with equivalents of such structures. For example, the various aspects of the lifting mechanisms 104, 350, and 602 are interchangeable.

Although illustrative embodiments have been described, those familiar with the technology will associate additional advantages and modifications. Therefore, in the broader aspects of the invention, the invention is not limited to the specific details shown and described herein. Therefore, the present invention is not intended to be limited to specific illustrative embodiments, but to be interpreted within the full spirit and scope of the scope of the appended application and its equivalents.

100‧‧‧Descriptive Lifting Chair/ Lifting Chair 101‧‧‧Chair back (unused) 102‧‧‧Chair Frame/Frame 104‧‧‧Lifting mechanism/Revealed lifting mechanism/Single spring lifting mechanism 106‧‧‧Outrigger 108‧‧‧Seat back/back 110‧‧‧Base 112‧‧‧Seat support 114‧‧‧seat/seat section 116‧‧‧Front seat section/seat section/front section/seat cushion 118‧‧‧Rear seat section/seat section/rear section/seat cushion 119‧‧‧Select flexible panel / flexible panel 120‧‧‧Middle seat support section/Middle seat section/Seat section/Middle section/Middle seat section ("Wedge")/Support wedge (Middle seat cushion) 122‧‧‧First seat pivot/seat pivot/pivot 124‧‧‧Parallelogram frame/parallelogram 126‧‧‧The first group of parallel links/parallelogram links 128‧‧‧The first group of parallel links / parallelogram links 130‧‧‧The second group of parallel links/parallelogram links Section 13-13‧‧‧ 132‧‧‧The second group of parallel link/parallelogram link 134‧‧‧Pivot/Parallelogram Pivot 136‧‧‧Pivot/Parallelogram Pivot 138‧‧‧Pivot/Parallelogram Pivot 140‧‧‧Pivot/Parallelogram Pivot 142‧‧‧Spring/Center Spring 144‧‧‧Spring Pivot/Pivot/Parallelogram Pivot 146‧‧‧Side support of lifting mechanism 148‧‧‧Spring axis 150‧‧‧Extension Section 15-15‧‧‧ 152‧‧‧Upper spring pivot/spring pivot/pivot 154‧‧‧Axle 156‧‧‧Slot 158‧‧‧Front seat support section/seat support section 160‧‧‧Rear seat support section/seat support section 162‧‧‧Middle seat support section/seat support section 164‧‧‧Tie rod 166‧‧‧Tie rod 168‧‧‧First tie rod pivot 170‧‧‧Backend Block Section 17-17‧‧‧ 172‧‧‧Second tie rod pivot / tie rod pivot 176‧‧‧Support spring 178‧‧‧Support Rod/Front Support Rod/Front Seat Section Support Rod 180‧‧‧Adjusting Knob Section 19-19‧‧‧ Section 3-3‧‧‧ 350‧‧‧Lifting mechanism/relative lifting mechanism/disclosed lifting mechanism/lifting mechanism (relative parallelogram) 352‧‧‧Parallelogram Pivot/Main Pivot/Lower Parallelogram Pivot 354‧‧‧Parallelogram Pivot/Pivot 356‧‧‧Parallelogram pivot 358‧‧‧Parallelogram pivot 359‧‧‧Part/Extension 360‧‧‧Lower parallelogram connecting rod 362‧‧‧Spring/Fully extended spring/Lift spring 364‧‧‧Upper lift spring pivot/spring pivot/spring (elastic part) pivot/pivot/lift spring pivot/lift pivot 366‧‧‧Lift Spring End Pivot/Spring End End/Pivot 368‧‧‧Slot/Slot Angle 382‧‧‧Parallelogram / Raised Parallelogram / Relative Raised Parallelogram 392‧‧‧Descriptive height 393‧‧‧seat height 394‧‧‧Lifting Angle/Tilt Lifting Angle/Incoming Lifting Angle/Inefficient Lifting Angle/Best Lifting Angle 396‧‧‧Slot angle 398‧‧‧Parallelogram short link length 400‧‧‧Parallelogram long connecting rod length 402‧‧‧Virtual Lever Arm/End Pivot Distance/Line/Lever Arm/2.27'' Lever Arm/Efficient Approaching 90°Lever Arm/Relatively Short 1.56'' Lever Arm/Descriptive Lever Arm Length/Lift Spring End Pivot The distance between the axis 366 and the main pivot 352 (the end pivot distance), which is the "lever arm" 404‧‧‧Limit Panel 406‧‧‧Base frame 408‧‧‧Forward parallelogram end block/end block 410‧‧‧seat/rising seat 412‧‧‧Horizontal connection bottom 414‧‧‧Wall 416‧‧‧Wall 420‧‧‧ times the farthest hole 422‧‧‧Back end block/end block/opposite end block/(parallelogram of) back end block 424‧‧‧Hole/selected hole/most front hole/most rear hole/hole (arc-shaped column) 426‧‧‧Horizontal tube or rod 428‧‧‧Radius/(of the arcuate column of hole 424) radius 430‧‧‧Incremental hole adjustment mechanism 432‧‧‧Descriptive spring wheel pin/spring wheel pin/opposite side spring wheel pin/pin 434‧‧‧Spring Cap 502‧‧‧Lifting mechanism/Lifting mechanism with slot adjustment piece and spring on the opposite side 504‧‧‧Linearly adjustable spring end pivot/spring end pivot/stuck spring end pivot 506‧‧‧Slot/Linear slot 508‧‧‧folding crank/crank 510‧‧‧Lead screw/Attached lead screw 512‧‧‧Swivel Nut/Nut 514‧‧‧One-piece transverse axle 516‧‧‧Yoke/Axle Joint Yoke 518‧‧‧Locator screw 520‧‧‧Spring termination adjustment mechanism/lifting force adjustment mechanism 522‧‧‧End Block/End Block/End Block of Lifting Mechanism (502) 524‧‧‧Extension Section 5-5‧‧‧ 602‧‧‧Lifting mechanism / Relative lifting mechanism / Revealed lifting mechanism / Double spring lifting mechanism / Lifting mechanism (the hole stays at the bottom when being lifted) 604‧‧‧Parallelogram 606‧‧‧Adjustment mechanism 608‧‧‧Connecting rod 610‧‧‧Fixed frame base 612‧‧‧Adjust pivot pin 614‧‧‧Hole 616‧‧‧Extension 700‧‧‧Descriptive Lifting Walking Chair/ Lifting Walking Chair/ Lifting Chair/ Folding Lifting Walking Chair 702‧‧‧Frame 704‧‧‧Lower frame assembly 706‧‧‧round 708‧‧‧backrest assembly 710‧‧‧Handrail 712‧‧‧Maximum height adjustment mechanism/height adjustment mechanism 714‧‧‧Height adjustment lever 716‧‧‧Height adjustment hole 718‧‧‧Seat or car seat/lifting walking chair seat 720‧‧‧Maximum height adjustment pin/height adjustment pin 722‧‧‧Folding mechanism/Descriptive folding mechanism/Other conventional folding mechanisms 724‧‧‧Lower Cross Bar 726‧‧‧Upper Cross Bar 728‧‧‧Center upright assembly/center upright 730‧‧‧Locking mechanism 732‧‧‧Standing arm support/support arm 734‧‧‧end block 736‧‧‧Lifting mechanism/central lifting mechanism 738‧‧‧Parallelogram structure/parallelogram/structure 740‧‧‧Spring 742‧‧‧Spring pivot 744‧‧‧Spring End Point/Spring End Pivot 745‧‧‧Pivot 746‧‧‧Pivot/Main pivot 747‧‧‧Pivot 748‧‧‧Spring end hole 749‧‧‧Pivot 750‧‧‧Distance/Lever Arm/Shortest Lever Arm 752‧‧‧Lifting adjustment pin 754‧‧‧Height adjustment sleeve/sleeve 756‧‧‧Connecting rod/Parallelogram connecting rod 758‧‧‧Lifting adjustment mechanism/lifting force adjustment mechanism 759‧‧‧Connecting rod/Parallelogram connecting rod 760‧‧‧Intermediate height adjustment mechanism/illustrative intermediate height adjustment mechanism/intermediate height adjustment piece/height adjustment mechanism 762‧‧‧Arm support pivot/stand arm support pivot 764‧‧‧Standing arm support adjustment pin/arm support adjustment pin/arm support pin 766‧‧‧Standing arm support adjusting pin recess/support pin recess/arm support pin recess 768‧‧‧Descriptive arm support adjustment mechanism / support arm adjustment mechanism / arm support adjustment mechanism / standing arm support adjustment mechanism Section 7-7‧‧‧ 770‧‧‧Intermediate height adjustment pin 772‧‧‧Sleeve hole 774‧‧‧Slot 776‧‧‧Extension pin 778‧‧‧ Rod/Guide Rod 780‧‧‧Center Upright Pivot/Center Pivot 782‧‧‧Slot 784‧‧‧Handle 786‧‧‧Tie Rod Link Set/Tie Rod 788‧‧‧Select foot pedal/foot pedal 790‧‧‧Pedal Pivot/Pivot A‧‧‧point or edge/detail B‧‧‧point or edge Line B-B‧‧‧ C‧‧‧Detail D-D‧‧‧line/section E‧‧‧detail F‧‧‧ details G‧‧‧Part/Detail H‧‧‧detail I‧‧‧detail J‧‧‧Part/Detail K‧‧‧detail L‧‧‧detail O‧‧‧ section P-P‧‧‧line T‧‧‧part Part V‧‧‧

All figures include an illustrative embodiment of a lifting chair and its components, an illustrative embodiment of a lifting mechanism that can be housed in a lifting chair or other equipment, and an illustrative lifting chair and associated components and mechanisms. The illustrative embodiments are best understood when reading the following detailed description in conjunction with the accompanying drawings.

Figure 1 is an isometric diagram of an illustrative lifting chair transitioning between a standing mode and a sitting mode.

Figure 2 is an isometric diagram of a lifting chair in a standing mode or from a sitting mode to a standing mode (depending on the specific design of the chair).

Fig. 3 shows a cross section of a lift chair in a sitting mode taken through the section 3-3 of Fig. 4;

Fig. 4 is a front view of a lifting chair to illustrate the cross section of Fig. 3 obtained by cutting.

Fig. 5 shows a cross section of a lifting chair taken through the section 5-5 of Fig. 6 from a sitting mode to a standing mode.

Fig. 6 is a front view of a lifting chair to illustrate the cross section of Fig. 5 after being cut.

Fig. 7 shows a cross section of a lifting chair in a standing mode taken through section 7-7 of Fig. 8.

Fig. 8 is a front view of a lifting chair to illustrate the cross section of Fig. 7 obtained by cutting.

Figure 9 is an isometric rear view of a lifting mechanism.

Figure 10 is a side view of a lifting mechanism.

Figure 11 shows a side view of a lifting mechanism without a front seat section cushion or a rear seat section cushion attached.

Fig. 12 is an isometric front view of a lifting mechanism without the front seat section cushion or the rear seat section cushion attached.

Figures 13A to 13B show a cross-sectional view through section 13-13 of Figure 14, which shows a side view of a lifting mechanism and a front seat section, a rear seat section and a middle seat section in a raised position One profile. Fig. 13B is an enlarged view of part V of Fig. 13A.

Fig. 14 is a rear view of a lifting chair to illustrate the cross section of Figs. 13A to 13B obtained by cutting.

15A to 15B show a cross-sectional view of the section 15-15 through FIG. 16, which shows a side view of a lifting mechanism and a front seat section, a rear seat section and a middle seat section in a sitting mode One section. Fig. 15B is an enlarged view of part J of Fig. 15A.

Fig. 16 is a rear view of a lifting chair to illustrate the cross section of Figs. 15A to 15B obtained by cutting.

17A to 17B show a cross-sectional view of the section 17-17 through FIG. 18, which shows a side view of a lifting mechanism and a front seat section, a rear seat section and a middle seat section in a raised position A section in which the spring termination point is in a slot position different from that in Figs. 15A to 15B. Fig. 17B is an enlarged view of part T of Fig. 17A.

Figure 18 is a rear view of a lifting chair to illustrate the cross section of Figures 17A-17B obtained by cutting.

19A to 19B show a cross-sectional view of the section 19-19 through FIG. 20, which shows a side view of a lifting mechanism and a front seat section, a rear seat section and a middle seat section in a sitting position A cross-section of the position, where the spring termination point is in a slot position different from that in FIGS. 13A to 13B. Figure 19B is an enlarged view of part G of Figure 19A.

Fig. 20 is a rear view of a lifting chair to illustrate the cross section of Figs. 19A to 19B obtained by cutting.

Figure 21 is a rear isometric view of a lifting mechanism without a seat cushion.

Figure 22 is a side view of a lifting mechanism with a seat cushion installed.

Figure 23 is a side view of a lifting mechanism without a seat cushion.

Figure 24 is an isometric front view of a lifting mechanism.

Figures 25 to 29 show the measured values related to the lifting mechanisms 104 and 350 (350 will be described below) obtained at various heights and under various adjustment conditions.

FIG. 25 illustrates that the parallelogram is a horizontal or substantially horizontal lifting mechanism.

Figure 26 shows the lifting mechanism in one of its highest parallelogram processes.

Figure 27 shows a side view of a lifting mechanism in a low position or a sitting position.

Figure 28 shows a side view of a lifting mechanism in a high position or a standing position.

Figure 29 illustrates a lifting mechanism for a seating position in a situation where the associated parallelogram link is horizontal and has a series of arcuate holes instead of a slot for adjustment purposes.

Figure 30 shows a lifting mechanism for a standing position when the spring is at a maximum extension.

Figure 31 shows a lifting mechanism with the spring at a maximum extension for a standing position.

Figure 32 shows the effect of the lowest lift position of the spring wheel axle pin in the rearmost hole position on the lift angle relative to the spring axis.

FIG. 33 shows a lifting mechanism with a restriction panel extending between point "A" and point "B".

Figure 34 shows one of the limiting panel positions when the lifting mechanism is in its lowest position.

Figure 35 illustrates an isometric view showing a limiting panel when the lifting mechanism is in a raised position.

FIG. 36 shows an isometric view of the lifting mechanism 350 when the seat 410 is in a folded mode to obtain a better visual effect of the device.

Figure 37 shows a lifting mechanism with a linearly adjustable spring terminating pivot, wherein the lifting mechanism including the spring is placed on the side of the seat.

Figure 38 is an isometric view of a part of the lifting mechanism shown in Figure 37, in which one side of the rear end block is rendered transparent.

Fig. 39 is a further isometric view of the spring termination adjustment mechanism of Fig. 38;

Figure 40 is an isometric view of an alternate lifting geometric structure that operates according to the same principle as the previously illustrated embodiment, but has a spring end point adjustment at the lowest end of a parallelogram-shaped long link Pieces.

Fig. 41 shows the lifting mechanism of Fig. 40 with a pad attached.

Figure 42 shows a spring termination adjustment mechanism.

Figure 43 is a front isometric view of a chair lift with an adjustable lifting mechanism in a lower sitting mode.

Figure 44 is a rear isometric view of one of the walking chairs with an adjustable lifting mechanism.

Figure 45 shows a front isometric view of a raised walking chair in one of a raised position or a standing position.

Figure 46 shows a rear isometric view of a raised walking chair in one of the raised positions.

Fig. 47A and Fig. 47B are front isometric views of a lifting mechanism adjusting member used for a lifting walking chair. Figure 47B shows detail A of Figure 47A.

Figure 48 shows a side view of an elevated walking chair in its highest elevated position.

Figures 49A to 49C show an adjustment step of the lifting mechanism. Fig. 49B shows a side sectional view of a chair lift taken through the line B-B of Fig. 49A. Figure 49C is an enlarged view of one of detail C of Figure 49B.

Figures 50A to 50C show an adjustment step of the lifting mechanism. Fig. 50B shows a side cross-sectional view of a lift chair taken through the line D-D of Fig. 50A. Figure 50C is an enlarged view of one of detail E of Figure 50B.

FIG. 51A and FIG. 51B show the lifting adjustment step performed after the adjustment step shown in FIG. 50A to FIG. 50C. Figure 51B is an enlarged view of one of detail F of Figure 51A.

Figure 52A and Figure 52B illustrate the next lifting adjustment step. Fig. 52B is an enlarged view of one of detail G of Fig. 52A.

Figures 53A and 53B show an initial lifting walking chair configuration before starting a maximum height adjustment procedure. Figure 53B is an enlarged view of one of the details H of Figure 53A.

54A and 54B illustrate the first maximum height adjustment step for changing one of the maximum heights that can be achieved by a chair lift. Figure 54B is an enlarged view of one of detail I of Figure 54A.

55A and 55B show a maximum height adjustment step under this illustrative embodiment. Figure 55B is an enlarged view of one of detail J of Figure 55A.

Figure 56 is a side view of an elevating walking chair, which shows a height adjustment pin that blocks a height adjustment sleeve from rising completely along a height adjustment rod.

Figures 57A to 57C illustrate a support arm adjustment mechanism. Fig. 57A is a side view of an illustrative lifting walking chair with a support arm adjustment mechanism. Figure 57B is a detail of section O of Figure 57A. Fig. 57C is a cross section of an arm support adjusting mechanism taken through the line P-P of Fig. 57B.

Figure 58A to Figure 58B show an intermediate height adjustment mechanism. Fig. 58A shows one lifting the walking chair with the middle height adjusting member and the seat in its lowest position. Figure 58B is a close-up of detail K from Figure 58A before selecting a height of a seat.

Figure 59A to Figure 59B illustrate an intermediate height adjustment mechanism. Fig. 59A shows a lifting walking chair with the middle height adjusting member and the seat fixed at a selected height. Fig. 59B is a close-up of the detail L from Fig. 59A showing the intermediate height adjuster joined to fix the height of the seat.

Figure 60 is an isometric rear view of a folding lift walking chair in a part of the folded position.

Fig. 61 shows a front view of a raised walking chair partially folded.

Figure 62 is a rear isometric view of a raised walking chair in a fully folded position.

Figure 63 is a front view of a lifting walking chair in a fully folded mode.

Fig. 64A to Fig. 64B show another embodiment of a height adjustment mechanism for a lifting walking chair.

Figure 65 shows an isometric view of a part of a lift walking chair with a seat attached to a central lift mechanism.

116‧‧‧Front seat section/seat section/front section/seat cushion

118‧‧‧Rear seat section/seat section/rear section/seat cushion

120‧‧‧Middle seat support section/Middle seat section/Seat section/Middle section/Middle seat section ("Wedge")/Support wedge (Middle seat cushion)

352‧‧‧Parallelogram Pivot/Main Pivot/Lower Parallelogram Pivot

354‧‧‧Parallelogram Pivot/Pivot

356‧‧‧Parallelogram pivot

358‧‧‧Parallelogram pivot

359‧‧‧Part/Extension

362‧‧‧Spring/Fully extended spring/Lift spring

382‧‧‧Parallelogram / Raised Parallelogram / Relative Raised Parallelogram

404‧‧‧Limit Panel

408‧‧‧Forward parallelogram end block/end block

422‧‧‧Back end block/end block/opposite end block/(parallelogram of) back end block

430‧‧‧Incremental hole adjustment mechanism

A‧‧‧point or edge/detail

B‧‧‧point or edge

Claims (22)

An adjustable lifting mechanism for use as a seating device or used with a seating device, which includes: a base; a parallelogram structure, which has four pivotally connected links (links), the parallelogram in four One of the pivots is connected to the base; a spring extending from a first link of the parallelogram to an adjustable end point on a second link of the parallelogram to form a lift A triangle, in which the spring end point is displaced from one of the main pivots of the parallelogram; an extension, which is in a fixed relationship with one of the four parallelogram links and is configured to be at an angle of the parallelogram The lifting mechanism maintains its angle with respect to the horizontal plane when the lifting mechanism changes between a sitting mode and a standing mode when it is raised or lowered; wherein the extension portion forms a rear seat area having a rear edge and a front edge Section; a front seat section with a rear edge and a front edge; the front seat section is pivotally attached to the rear seat section at the rear edge of the front seat and the front edge of the rear seat, this It is configured to allow the front seat section to descend downward in the standing mode and return to the sitting mode; the shape is formed between the front seat section and the rear seat section in a sitting mode Complementary to a space, an intermediate seat section that is configured to occupy the space in the sitting mode and vacate the space to allow the front seating area when transitioning to the standing mode Section is folded down; and a lifting power adjustment mechanism, which is configured to adjust the spring end point relative to the main pivot The position of the axis. Such as the lifting mechanism of claim 1, wherein the adjustment mechanism includes a pin connected to the spring and a series of holes that can selectively position the pin. Such as the lifting mechanism of claim 2, wherein the series of holes form an arc, and the radius of the arc is from a spring pivot on one of the four parallelogram links to the spring when the spring is fully extended Is the length of the hole. The lifting mechanism of claim 1, wherein the adjustment mechanism includes a pin connected to the spring and a slot that can selectively position the pin. Such as the lifting mechanism of claim 1, wherein the middle seat section is positioned on the base and remains in place on the base in the sitting mode and the standing mode. Such as the lifting mechanism of claim 1, wherein the middle seat section is attached to one of the four parallelogram links and moves with one of the four parallelogram links, and thereby achieve Move to the proper position in this sitting mode. Such as the lifting mechanism of claim 1, which is configured such that the spring is compressed by the weight of a occupant, and expanded when the user transfers the weight to the user's leg. Such as the lifting mechanism of claim 1, its configuration is such that under any lifting power adjustment, the rear The maximum height of the seat section is the same. For example, the lifting mechanism of claim 1, which is configured such that the extension moves forward when the parallelogram is lifted and the front seat section is lowered, thereby causing the center of balance of a user to move upwards of the user's feet . Such as the lifting mechanism of claim 1, which has a lifting force between 50% and 95% of the weight of a user. Such as the lifting mechanism of claim 1, wherein the vertical displacement from the sitting mode to the standing mode is within a range of 8 inches to 16 inches. For example, the lifting mechanism of claim 1, further comprising a restriction panel having a first edge attached to the front seat section and a second edge attached to a middle seat section. Such as the lifting mechanism of claim 1, wherein the rear seat section and the front seat section have integrated cushions. A chair including a lifting mechanism as in claim 1. An adjustable lifting mechanism, which includes: a base; A parallelogram structure, which has four pivotally connected links, the parallelogram is connected to the base at one of the four pivots; a spring, which is pivotable from one of the parallelograms A connecting rod extends to an adjustable end point of a second connecting rod of the parallelogram to form a lifting triangle, wherein the spring end point is displaced from a main pivot of the parallelogram; an extension part is connected to One of the four parallelogram links is in a fixed relationship and is configured to maintain when the angle of the parallelogram changes based on the raising or lowering of the lifting mechanism between a sitting mode and a standing mode Its angle with respect to the horizontal plane; a lifting power adjustment mechanism configured to adjust the position of the spring end point relative to the main pivot; and an intermediate height adjustment mechanism, wherein the intermediate height adjustment mechanism includes: a height adjustment A rod, which has a plurality of holes along at least a part of its length; and a sleeve, which is slidably attached to the height adjustment rod and reqistered to the parallelogram structure; a pin, which passes through It is configured to be inserted through one of the holes in the sleeve and into one of the holes. For example, the lifting mechanism of claim 15, wherein the adjustment mechanism includes: an arc of a hole, a first spring end can be selectively aligned with the holes and fixed to the holes; and when the spring is fully extended , The center of the arc is at one of the second ends of the spring. A seat that includes a lifting mechanism as in claim 16. A lift chair includes: an adjustable lifting mechanism, which has: a base; a parallelogram structure, which has four pivotally connected links, the parallelogram is connected to one of the four pivots The base; a spring, which pivotally extends from a first link of the parallelogram to an adjustable end point on a second link of the parallelogram to form a lifting triangle, wherein the spring end point Displacement from one of the main pivots of the parallelogram; an extension, which is in a fixed relationship with one of the four parallelogram links, and is configured to be at an angle of the parallelogram based on the lifting mechanism in a seat Maintains its angle relative to the horizontal plane when the elevation or decline between the down mode and a standing mode changes; a lifting power adjustment mechanism configured to adjust the position of the spring end point relative to the main pivot; And an intermediate height adjustment mechanism, wherein the intermediate height adjustment mechanism comprises: a height adjustment rod having a plurality of holes along at least a part of its length; and a sleeve which is slidably attached to the height adjustment rod And it is registered to the parallelogram structure; a pin is configured to be inserted through a hole in the sleeve and into one of the holes. For example, the chair lift of claim 18 further includes a maximum height adjustment mechanism. The chair lift of claim 19, wherein the maximum height adjustment mechanism includes: a height adjustment rod having a plurality of holes along at least a part of its length; and a pin configured to be inserted into the plurality of holes One of the holes. For example, the chair lift of claim 18 further includes a folding mechanism. For example, the chair lift of claim 18 further includes a support arm adjustment mechanism.

Images