JP2021519672A - Push-up mechanism and chair - Google Patents

Abstract

Adjustable push-up mechanism for use as a seating device or with a seating device. The push-up mechanism has a base to which a swivel shaft of a parallelogram structure is attached. A spring extends from the first link of the parallelogram to the adjustable end point on the second link of the parallelogram to form a push-up triangle. The end point of the spring moves from the parallelogram main swivel axis to create an adjustable "lever arm" for varying the push-up force. The push-up power adjustment mechanism adjusts the position of the spring end point with respect to the main turning shaft. The extension has a fixed relationship with one of the four parallelogram links, and the angle of the parallelogram changes when the push-up mechanism is moved up and down between the sitting mode and the standing mode. It is configured to be maintained when it is done. Therefore, the extension functions as the base of the rear seat portion. The front seat portion is pivotally attached to the rear seat portion so that it can swing downward when the push-up mechanism is raised.

Description

This application was filed on March 29, 2018, US Provisional Patent Application No. 62/649809 entitled "Push-up Chair" and March 29, 2018, "Elevating Walkchair, Push-up Mechanism and Seat". US Provisional Patent Application No. 62/649746, filed on November 6, 2017, and International Patent Application No. PCT / US2017 / 060163, entitled "Two-Step Casters and Methods," and January 13, 2017. Claims the priority of US Application No. 15/326113 entitled "Elevating Walkchair". All of the applications listed herein are incorporated herein by reference.

Some people have a longer lifespan, but are unable to maintain the strength of their arms, legs, and trunk to easily get out of the chair. People suffering from illness and related injuries may also have problems with this essential element of mobility.

Typically, the higher the elderly seat is off the floor, the less comfortable it is as a result. Low chairs, such as luxurious armchairs, are comfortable to sit on for long periods of time, but are difficult to stand up. Existing push-up chairs do not optimize support for the anatomical reality of standing up from a seat.

In an electric push-up chair, it is typically pushed up by tilting the entire structure of the chair. This moves the body forward and tilts the seat to a position where it is often frightening. Traditional spring-loaded chairs do not provide consistent push-up (isoelasticity) or ergonomically suitable push-up shapes.

When the human torso rises from the seated position to the upright position, the hip joint draws an arc with a radius roughly equal to the length of the thigh. This arcuate movement naturally ends when the hip joint intersects the vertical plane above the ankle, centered on the knee joint. Ideally, the knee joint would remain nearly stationary, but with a great deal of effort pushing down the armrest without compensating for the abrupt imbalance that occurs before the center of gravity reaches its upright position. We must spend time to supply the power that a well-made push-up support chair would be able to exert comfortably.

For this reason, in the absence of push-up assistance, people with movement disorders may be more and more desperate to bring their center of gravity onto their feet by shaking their shoulders forward of the seat cushion and pushing it forward three times. Then, instruct them to stand up straight.

Ideally, a push-up support chair or push-up support cushion would allow the user to stand up freely at or near a natural human pace. This is different from the electric push-up support chair, which is significantly slower to its awkward tilted position and travels noisily.

Disclose an adjustable push-up mechanism for use as a seating device or with a seating device. In an exemplary embodiment, the push-up mechanism has a base to which a swivel shaft of a parallelogram structure is attached. The parallelogram structure has four links that are pivotally connected. A spring extends from the first link of the parallelogram to the adjustable end point on the second link of the parallelogram to form a push-up triangle. Here, the end point of the spring is deviated from the main turning axis of the parallelogram. The deviation of the spring end point from the main turning shaft creates a "lever arm" that can affect the pushing force. The push-up power adjustment mechanism adjusts the position of the spring end point with respect to the main turning shaft. The extension is provided in a fixed relationship to one of the four parallelogram links, and its angle with respect to the horizontal is parallel at the time the push-up mechanism is moved up and down between the seating mode and the standing mode. It is configured to maintain when the angle of the quadrilateral changes. The extension can form a rear seat portion, or a base for supporting the rear seat portion. The front seat portion is pivotally attached to the rear seat portion so that the front seat portion can swing downward when the mechanism is raised from the seating mode to the standing mode.

All drawings include exemplary embodiments of the push-up chair and its components, exemplary embodiments of the push-up mechanism that may be included in the push-up chair or other device, and exemplary push-up chairs and related parts and mechanisms. Is included. The exemplary embodiments are best understood from the detailed description when read in conjunction with the accompanying drawings.
FIG. 1 is an isometric view of an exemplary push-up chair transitioning between standing and sitting modes. FIG. 2 is an isometric view of a push-up chair in standing mode or a push-up chair that transitions from sitting mode to standing mode according to a particular design of the push-up chair. FIG. 3 is a diagram showing a cross section of a push-up chair in the seating mode obtained from the cross section 3-3 of FIG. FIG. 4 is a front view of a push-up chair for exemplifying a cross section for acquiring FIG. FIG. 5 is a view obtained from the cross section 5-5 of FIG. 6 and showing a cross section of the push-up chair when shifting from the sitting mode to the standing mode. FIG. 6 is a front view of a push-up chair for exemplifying a cross section for obtaining FIG. FIG. 7 is a diagram showing a cross section of the upright mode push-up chair obtained from the cross section 7-7 of FIG. FIG. 8 is a front view of a push-up chair for exemplifying a cross section for acquiring FIG. 7. FIG. 9 is an isometric rear view of the push-up mechanism. FIG. 10 is a side view of the push-up mechanism. FIG. 11 is a side view of the push-up mechanism to which the front seat partial cushion or the rear seat partial cushion is not attached. FIG. 12 is an isometric front view of the push-up mechanism to which the front seat portion cushion or the rear seat portion cushion is not attached. FIG. 13A is a cross-sectional view passing through the cross section 13-13 of FIG. 14, showing a side view of the push-up mechanism and a cross-sectional view of the front seat portion, the rear seat portion, and the central seat portion in the raised position. be. FIG. 13B is an enlarged view of a portion V of FIG. 13A. FIG. 14 is a rear view of a push-up chair for exemplifying a cross section for acquiring FIGS. 13A and 13B. FIG. 15A is a cross-sectional view passing through the cross section 15-15 of FIG. 16, showing a side view of the push-up mechanism and a cross-sectional view of the front seat portion, the rear seat portion, and the central seat portion. FIG. 15B is an enlarged view of a portion J of FIG. 15A. FIG. 16 is a rear view of a push-up chair for exemplifying a cross section for acquiring FIGS. 15A and 15B. FIG. 17A is a cross-sectional view taken through the cross section 17-17 of FIG. 18, and is a side view of the push-up mechanism and a front portion at an ascending position in a state where the spring end point is in a slot position different from that of FIGS. 15A and 15B. It is a figure which shows the cross section of the seat part, the rear seat part, and the central seat part. FIG. 17B is an enlarged view of a portion T of FIG. 17A. FIG. 18 is a rear view of a push-up chair for exemplifying a cross section for acquiring FIGS. 17A and 17B. FIG. 19A is a cross-sectional view taken through the cross section 17-17 of FIG. 18, and is a side view of the push-up mechanism and a front portion at a seating position in a state where the spring end point is in a slot position different from that of FIGS. 13A and 13B. It is a figure which shows the cross section of the seat part, the rear seat part, and the central seat part. FIG. 19B is an enlarged view of a portion G of FIG. 19A. FIG. 21 is an isometric rear view of the push-up mechanism in which the seat cushion is not installed. FIG. 22 is a side view of the push-up mechanism in which the seat cushion is installed. FIG. 23 is a side view of the push-up mechanism in which the seat cushion is not installed. FIG. 24 is an isometric front view of the push-up mechanism. FIG. 25 is a diagram showing measurements related to a push-up mechanism 104 that performs various adjustments at various heights, showing a push-up mechanism in which the parallelogram is horizontal or nearly horizontal. .. FIG. 26 is a diagram showing measured values related to the push-up mechanism 104 that performs various adjustments at various heights, showing the push-up mechanism at the highest position in the range of motion of the parallelogram. be. FIG. 27 is a view showing measurements associated with a push-up mechanism 104 that performs various adjustments at different heights, and is a side view of the push-up mechanism at a lower or seated position. FIG. 28 is a view showing measurements associated with the push-up mechanism 104 that performs various adjustments at different heights, and is a side view of the push-up mechanism in a high or upright position. FIG. 29 is a diagram showing measurements associated with a push-up mechanism 350 (described below) that makes various adjustments at different heights, with interlocking parallelogram links horizontal in the seating position. Yes, it is a diagram showing a push-up mechanism that uses a series of arcuate holes instead of slots for adjustment purposes. FIG. 30 is a diagram showing a push-up mechanism in which the extension of the spring is maximum due to the standing position. FIG. 31 is a diagram showing a push-up mechanism in which the extension of the spring is maximum due to the standing position. FIG. 32 is a diagram showing how the minimum push-up position of the spring mandrel pin at the rearmost hole position affects the push-up angle with respect to the spring shaft. FIG. 33 is a diagram showing a push-up mechanism having a restraint panel extending between points "A" and "B". FIG. 34 is a diagram showing the position of the restraint panel when the push-up mechanism is at its lowest position. FIG. 35 is an isometric view showing a restraint panel when the push-up mechanism is in the raised position. FIG. 36 is an isometric view of the push-up mechanism 350 with a seat 410 in folding mode for better visualization of the device. FIG. 37 is a view showing a push-up mechanism having a linearly adjustable spring end swivel shaft, in which a push-up mechanism with a spring is arranged on the side surface of the seat. FIG. 38 is an isometric view of a part of the push-up mechanism shown in FIG. 37, in which the side surface of the rear end block is rendered transparently. FIG. 39 is an isometric view further showing the spring termination adjusting mechanism of FIG. 38. FIG. 40 is an alternative push-up isometric view that operates according to the same principles as the embodiments shown so far, but has a spring termination point adjustment at the lower end of a long parallelogram link. FIG. 41 is a diagram showing a push-up mechanism of FIG. 40 to which a cushion is attached. FIG. 42 is a diagram showing a spring termination adjusting mechanism. FIG. 43 is a front isometric view of a lower seating mode elevating push-up chair with an adjustable push-up mechanism. FIG. 44 is a rear isometric view of an elevating walking chair with an adjustable push-up mechanism. FIG. 45 is a front isometric view of the elevating walking chair in the ascending position or the standing position. FIG. 46 is a rear isometric view of the elevating walking chair in the standing position. FIG. 47A is a front isometric view of adjusting the push-up mechanism of the elevating walking chair. FIG. 47B is a diagram showing a detailed portion A of FIG. 47A. FIG. 48 is a side view of the elevating walking chair at the highest push-up position. FIG. 49A is a diagram showing the steps of adjusting the push-up mechanism. FIG. 49B is a side sectional view of the elevating push-up chair obtained from the line BB of FIG. 49A. FIG. 49C is an enlarged view of the detail portion C of FIG. 49B. FIG. 50A is a diagram showing the steps of adjusting the push-up mechanism. FIG. 50B is a side sectional view of the elevating push-up chair obtained from the line DD of FIG. 50A. FIG. 50C is an enlarged view of the detailed portion E of FIG. 50B. FIG. 51A is a diagram showing a push-up adjustment step after the steps shown in FIGS. 50A to 50C. FIG. 51B is an enlarged view of the detail portion F of FIG. 51A. FIG. 52A is a diagram showing the next push-up adjustment step. FIG. 52B is an enlarged view of the detail portion G of FIG. 52A. FIG. 53A is a diagram showing an initial elevating walking chair configuration before the start of the maximum height adjustment procedure. FIG. 53B is an enlarged view of the detail portion H of FIG. 53A. FIG. 54A is a diagram showing a first maximum height adjustment step for changing the maximum height that the elevating push-up chair can achieve. FIG. 54B is an enlarged view of the detail portion H of FIG. 54A. FIG. 55A shows the next maximum height adjustment step of this exemplary embodiment. FIG. 55B is an enlarged view of the detail portion H of FIG. 55A. FIG. 56 is a side view of an elevating pedestrian chair showing a height adjusting pin that prevents the height adjusting sleeve from rising completely along the height adjusting bar. FIG. 57A is a view showing a support arm adjusting mechanism, and is a side view of an exemplary elevating walking chair having the support arm adjusting mechanism. FIG. 57B is a detailed view of a portion O of FIG. 57A. FIG. 57C is a cross-sectional view of the arm support adjustment mechanism acquired from the line PP of FIG. 57B. FIG. 58A is a diagram showing an intermediate height adjusting mechanism, showing an elevating walking chair equipped with an intermediate height adjusting device and a seat at the lowest position. FIG. 58B is a close-up of detail portion K of FIG. 58A before selecting the seat height. FIG. 59A is a diagram showing an intermediate height adjusting mechanism, showing an elevating walking chair provided with an intermediate height adjuster in a state where the seat is fixed at a selected height. FIG. 59B is a close-up of detail portion K of FIG. 58A showing an intermediate height adjustment engaged to fix the height of the seat. FIG. 60 is an isometric rear view of a foldable elevating walkchair in a partially folded position. FIG. 61 is a front view of a partially folded elevating walking chair. FIG. 62 is a rear isometric view of the elevating walking chair in a fully folded position. FIG. 63 is a front view of the elevating walking chair in the fully folded mode. FIG. 64A is a diagram showing another embodiment of the height adjusting mechanism for the elevating walking chair. FIG. 64B is a diagram showing another embodiment of the height adjusting mechanism for the elevating walking chair. FIG. 65 is an isometric view of a portion of an elevating pedestrian chair having a seat attached to a central push-up mechanism.

In an exemplary embodiment of a push-up chair, the center of the user's equilibrium in the seated position can be moved over stationary knees and feet with less energy consumption than required to stand up from a conventional chair. ..

In an exemplary embodiment of the push-up chair mechanism, equilibrium can occur throughout the movement of the user's center of gravity from sitting to standing, resulting in an obstacle in which the user's weight interferes with any part of that movement. As reduced or eliminated.

An exemplary embodiment of a push-up chair includes an adjustable mechanism to accommodate the push-up power for a wide range of human body weights.

An exemplary embodiment of the push-up chair mechanism also when the seat cushion is removed and re-seated to allow the standing seat cushion to be folded without interfering with the user's standing or sitting movements. Means for pulling out and reinserting the nearly wedge-shaped or other complementary central seat support portion that needs to be restored to may be provided.

Separately, the central seat support may be stationary with respect to the base frame of the push-up mechanism, so that the seats move closer to or further from the central seat support for seat support or folding, respectively. Or something.

FIG. 1 is an isometric view of an exemplary push-up chair 100 transitioning between standing and sitting modes. The push-up chair 100 has a seat 114 with a front seat portion 116 and a rear seat portion 118. In the seating mode, the front seat portion 116 and the rear seat portion 118 form a surface suitable for seating, for example by abutting against each other. Seat portions 116, 118 may have different contours, as conventional chairs do.

FIG. 2 is an isometric view of the upright mode push-up chair 100 or the push-up chair 100 in transition from the sitting mode to the upright mode, depending on the particular design of the chair. The rear seat portion 118 rises from the seated position to facilitate the seated person leaving the push-up chair 100 by shifting from the seated position to the upright position. The front seat portion 116 is angled downward to facilitate the transfer of weight from the seat portion 114 to the seated leg. An optional flexible panel 119 has a first edge attached to the backrest 108 of the push-up chair 100 and a second edge attached to the rear seat portion 118. The flexible panel 119 shields the push-up mechanism contained in the push-up chair 100, such as the push-up mechanism 104 or the push-up mechanism 350 shown in FIG. 29. The flexible panel 119 may be removable to allow access to the push-up mechanism 104 and its adjusting parts.

FIG. 3 shows an exemplary cross section of the seating mode push-up chair 100, obtained from cross section 3-3 of FIG. FIG. 5 shows a cross section of the push-up chair 100 during the transition from the sitting mode to the standing mode, which is obtained from the cross section 5-5 of FIG. FIG. 7 shows a cross section of the upright mode push-up chair 100 obtained from cross section 7-7 of FIG.

The push-up chair 100 has a chair frame 102 and a push-up mechanism 104 attached to the frame. The chair frame 102 may have any configuration including parts that are combined to form a seating device, such as an armchair, a desk chair, a backless chair or an elevating walking chair. In an exemplary embodiment, the frame 102 has a plurality of legs 106, a backrest 108 and a base 110. The chair frame 102 may also include a seat support 112 that supports the seat 114. Separately, the push-up mechanism 104 may have a seat entirely incorporated therein or a seat attached to the mechanism. In that case, the parts of the push-up mechanism 104 form the seat.

3, 5, and 7 show a seat 114 with a front seat portion 116 and a rear seat portion 118. Both seat portions are directly or indirectly attached to the push-up mechanism 104. Seat portions 116, 118 include cushions in this embodiment. The cushions of the front seat portion 116 and the rear seat portion 118 are attached to the front seat support portion 158 and the rear seat support portion 160, respectively, as shown in, for example, FIGS. 12, 13, 21, and 24, respectively. The rear seat portion 118 is hinged to or otherwise pivotally attached to the front seat portion 116 at the first seat swivel axis 122 and is pivotally attached to the user using the push-up mechanism 104 from the seated position. Allows the relative position to be changed between both seats when moving up and down. The seat 114 may also include a central seat support portion 120 that reinforces or reinforces the seat 114 in the area below the first seat swivel axis 122.

As shown, for example, in FIGS. 3, 5, and 7, the push-up mechanism 104 includes a parallelogram frame 124. The parallelogram frame 124 is a parallel link with a first set of parallel links 126, 128, pivotally attached to each other on swivel axes 134, 136, 138, 140 to form a parallelogram. It has a second set of 130, 132. The parallelogram link 126 has an extension 150 arranged at an angle with respect to the parallelogram link 126. This will be described in more detail below.

9 to 12 are views further showing the push-up mechanism 104 in the standing mode or the pushing-up mechanism 104 shifting from the sitting mode to the standing mode. FIG. 9 is an isometric rear view of the push-up mechanism 104. FIG. 10 is a side view of the push-up mechanism 104.

9 and 10 show a front seat portion 116, a rear seat portion 118, and a center seat portion 120 attached to the push-up mechanism 104. FIG. 11 shows a side view of the push-up mechanism 104 to which the cushion portion of the front seat portion 116 and the rear seat portion 118 is not attached. FIG. 12 is an isometric front view of the push-up mechanism 104. Again, the cushion portions of the seat portion 116 and the rear seat portion 118 are not attached. The spring 142 is attached to the spring mandrel at the center of the mandrel in the longitudinal direction. The spring mandrel swivels with respect to the parallelogram link 132 on the spring swivel shaft 144. The spring 142 is pivotally attached to the end of the extension 150 on the side opposite to the origin of the extension 150 of the parallelogram link 126. The extension 150 may be attached to or integrated with the parallelogram link 126. The spring swivel shaft 144 is adjustable along a portion of the parallelogram link 132. In the illustrated exemplary embodiment, the spring 142 is attached to a spring mandrel and extends into slot 156, thereby being adjustable along slot 156 and thus along the parallelogram link 132. The slot 156 may be linear or arcuate with a center at the opposite end of the extended spring 142.

It should be noted that although the spring mandrel is not explicitly shown in the figure, its location is revealed by identifying the spring swivel axis 144 and extends perpendicular to the plane of the parallelogram link 132.

Returning to FIG. 5, the seat 114 shifts from the seating mode to the standing mode by operating the push-up mechanism 104 in order to assist the user when standing up from the seating position. When the parallelogram frame 124 turns with respect to the push-up mechanism side support portion 146 on the turning shafts 134 and 136, the seat 114 rises. When the occupant stands up, the occupant's weight begins to shift to the floor, which allows the spring 142 to extend. When the extension 150 swivels about the swivel shaft 140 with respect to the parallelogram link 130, the distance from the upper spring swivel shaft 152 to the swivel shaft 144 increases, providing the distance required for the extension of the spring 142. When the push-up chair 100 is in the seating mode, the spring 142 is compressed by the weight of the seated person.

The spring 142 may be, for example, a compression spring such as a gas spring. Other exemplary types of springs include tension springs (which will be deployed contralaterally on a parallelogram to provide equivalent push-up forces). 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 exemplary force progression range from fully extended to fully compressed is 45% to 55%, with a "p1" value in the range of 2600N to 1300N and a "p2" in the range of 1700N to 4200N. The value is obtained. In an exemplary embodiment, the spring 142 has a stroke in the 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 turn around the swivel shafts 134, 136, 138, 140, movement is given to the seat portions 116, 118, 120 of the seat 114. When the seat 114 transitions from the upright mode to the seated mode, the rear seat support portion 160 remains relatively parallel to the floor and the front seat portion 116 has the seat swivel axis 122 relative to the rear seat portion 118. It turns around and therefore rotates from a downward angle to a horizontal position or near a horizontal position. Depending on the desired design of the chair, the front seat support portion 158 and the rear seat support portion 160 may be angled from the horizontal in the seating mode. For example, the front of the seat 114 may be higher than the rear of the seat 114. Similarly, the backrest 108 may be vertical or angled vertically to achieve the desired position for practicality or comfort. When the parallelogram link 130 is attached directly or indirectly to the parallelogram link to reach a horizontal position, the central seat portion 120 supports the seat 114 below the seat swivel shaft 122. To automatically move to a predetermined position.

In the embodiment shown in FIGS. 9 to 12, the front seat support portion 158 is connected to the central seat support portion 162 by the tie rod 164 at the first tie rod swivel shaft 168. The second end of the tie rod 164 is pivotally attached to the front seat support portion 158 by the second tie rod swivel shaft 172. When the push-up chair 100 shifts from the seating mode to the standing mode, the parallelogram link 130 of the parallelogram frame 124 rotates around the swivel shafts 134 and 140, and the central seat support portion 162 is changed to the front seat portion 116 and the rear seat. Move away from part 118. As a result, the front seat support portion 158 can turn downward with respect to the rear seat support portion 160.

21 to 24 show the push-up mechanism 104 in the seating mode. FIG. 21 is an isometric rear view of the push-up mechanism 104. FIG. 22 is a side view of the push-up mechanism 104.
The front seat portion 116, the rear seat portion 118, and the center seat portion 120 are shown in FIGS. 21 and 22 in a state of being attached to the push-up mechanism 104. FIG. 23 shows a side view of the push-up mechanism 104 without a seat cushion. FIG. 24 is an isometric front view of the push-up mechanism 104.

FIG. 22 shows the front 116 and the rear 118 forming the seating surface in the seating mode. The central seat portion 120 swivels to a predetermined position below the seat swivel shaft 122.

In the embodiments shown in FIGS. 9-12 and 21-24, the central seat support portion 162 and the rear seat support portion 160 are provided with support springs 176 that can form a more comfortable base than hard parts, such as wooden platforms. It is a platform. However, this disclosure includes the design of chairs incorporating other supports for such rigid platforms or cushions.

The front seat support portion 158 is designated as a support bar 178. Additional structural components may form the front seat support portion 158. The front seat portion 116 is attached to a front support bar 178 that rotates on a tie rod swivel shaft 172, resulting in, for example, as shown in FIG. 7, when the push-up mechanism transitions from seating mode to standing mode. It can be folded downward with respect to the rear seat support portion 160 about the swivel shaft 122.

The seat portions 116, 118, 120 of the seat 114 are separately attached or incorporated into the push-up mechanism 104. The cushion component of the front seat portion 116 is attached to the front seat support portion 158 of the push-up mechanism 104. The cushion component of the rear seat portion 118 is attached to the rear seat support portion 160. The wedge-shaped portion of the central seat portion 120 is attached to the central seat support portion 162. The central seat support portion 162 may be a parallelogram link 130 or a fixed attachment to the parallelogram link 150. The cushion portions of the seat portions 116, 118, 120 may be integrated with the seat support portions 158, 160, 162, or may be attached to the respective seat support portions. 3, 5 and 7, respectively, show cushion portions of seat portions 116, 118, 120 having cushions attached to seat support portions 158, 160, 162, respectively. When the parallelogram link 126 swivels around a swivel shaft 138, the extension 150 remains approximately parallel to the ground, so that the seat portion mounted directly or indirectly to the extension 150. 118 also remains almost parallel to the floor. The extension 150 does not have to be integral with the parallelogram link and need not be directly connected to the link. It just needs to work in a fixed relationship with the link. Additional components can be provided between the extension 150 and the parallelogram link 126 or other parallelogram link. However, it is a condition that the extension 150 is maintained at a fixed angle with respect to the ground during ascent and descent, so that the seat can be attached to the extension and can remain at a fixed angle. In an exemplary embodiment, the extension 150 is a seat.

The push-up mechanism 104 may be adjusted to accommodate seated persons of different weights. 13A, 13B and 15A, 15B show a push-up mechanism 104 tuned for the highest seater weight adaptation for this embodiment. 13A, 13B and 14 show the upright mode push-up mechanism 104, and FIGS. 15A, 15B and 16 show the seating mode push-up mechanism 104. 17A, 17B and 19A, 19B show a push-up mechanism 104 tuned for the lowest seater weight adaptation of this embodiment. 17A, 17B and 18 show the upright mode push-up mechanism 104, and FIGS. 19A, 19B and 20 show the seating mode push-up mechanism 104.

13A is a cross-sectional view passing through the cross section 13-13 of FIG. 14, and therefore shows a side view of the push-up mechanism 104 and a cross-sectional view of the front seat portion 116, the rear seat portion 118, and the central seat portion 120. .. FIG. 13B is an enlarged view of a portion V of FIG. 13A. As mentioned above, FIGS. 13A, 13B and 14 show an upright mode push-up mechanism adjusted for maximum adaptation with respect to the weight of the occupant. In the illustrated embodiment, the mechanism that adjusts the push-up mechanism 104 to accommodate seated persons of different weights includes a swivel shaft 144 that is positionally adjustable along slot 156 to control push-up efficiency. The spring swivel shaft 144 is indicated at the frontmost position or the lowest position of the slot 156. The "spring swivel shaft 144" is generally used herein and may be in the form of a mandrel extending through slot 156.

The spring 142 rotates with respect to the extension portion 150 on the spring rotation shaft 152. Although the position of the spring swivel shaft 152 is fixed with respect to the extension portion 150, the spring 142 can rotate about the swivel shaft 152. In addition, the position of the extension portion 150 has a fixed relationship with respect to the parallelogram link 126. Therefore, the position of the spring swivel shaft 152 is also fixed with respect to the parallelogram link 126. This is because the parallelogram links 126, 128, 130, 132 have parallelogram swivel axes 134, 136, regardless of the height, or whether the push-up chair 100 or push-up mechanism 104 is in sitting or standing mode. It retains its shape even when turning around 138,140. This relationship is also maintained regardless of the weight of the seated person.

When the spring swivel shaft 144 is positioned in slot 156 towards the rear of the push-up chair 100 or push-up mechanism 104, as shown in FIGS. 19B and 20B, the virtual push-up lever arm is shortened and the push-up power is minimized. , The pushing action caused by the action of the parallelogram frame 124 on the spring 142 becomes more isoelastic. This position will typically be more suitable for lighter seated seaters. When the spring mandrel is installed along slot 156 near the front of the push-up chair 100 or push-up mechanism 104, power is maximized and the isoelasticity of push-up caused by the action of the parallelogram frame 124 on the spring 142. Will decrease. This is beneficial for heavier seaters. As used herein, "isoelasticity" means constant elasticity over the range of motion of the push-up mechanism. Although perfect isoelasticity may not always be achieved or desirable, relative isoelasticity may be affected by the adjustment mechanism. Theoretically, the weight of the occupant should be balanced by the force of the spring over the range of motion of the push-up mechanism. For a heavier seated person, it may be desirable to change the power at the start or end of the range of motion compared to the rest of the push-up range of motion.

The spring swivel shaft 144 can be adjusted along slot 156 by rotating the adjustment knob 180. Slots 156 are strategically positioned on the parallelogram frame 124 with respect to the position of the parallelogram swivel shaft 144 for optimum or beneficial isoelasticity. The position of the swivel shaft 144 in slot 156 with respect to the swivel shaft 138 determines the efficiency of the spring angle and thus the force exerted by the spring on the parallelogram frame 124. In an exemplary embodiment, the spring swivel shaft 144 in slot 156 is offset from the position of the parallelogram swivel shaft 138. When the spring 142 is orthogonal to the slot 156, the adjustment of the spring swivel axis along the slot 156 will be generally the easiest.

In the embodiments shown in FIGS. 1 to 24, the push-up mechanism 104 is symmetrical, so that the parts identified in the side view may be exactly the same when viewed from the opposite side. Embodiments also include structures with a single parallelogram, spring structure or single support component, as shown in FIG. 65.

In an exemplary embodiment of the push-up mechanism 104, the side aspect ratio of the push-up parallelogram 124 is relatively low. Even when adjusted to maximum push-up power, a very large elastic force is applied to the link mechanism of the parallelogram 124 or the relatively short "lever arm" which is an extension adjacent to or fixed to the side surface. .. In an exemplary embodiment, the aspect ratio is 6: 1 or about 6: 1. See FIGS. 25-29 for an example of the virtual lever arm 402.

Adjusting to a minimum pushing force, for example by adjusting pins and holes, or through slots through which pins or similar parts can slide, makes such lever arms even shorter and shortened by up to 80% in length. , The aspect ratio is improved to 24: 1. An exemplary aspect ratio range is 6: 1 to 24: 1. The optimum aspect ratio may depend, for example, on the pushing force of the elastic member and the lever arm. The elastic member of any of the pushing mechanisms described herein may be, for example, a spring such as a gas spring. For brevity, the elastic member is referred to as a spring or gas spring and may be drawn, but other elastic members may be used.

Next, an exemplary push-up angle of the push-up mechanism 104 will be described. Further, this exemplary embodiment shows that in any push-up adjustment from weakest to strongest, the seat 114 or other payload can rise to the same height when the spring is fully extended. become. This feature can be highly desirable because the raised seats are even higher for lighter users and appear at a constant height rather than protruding forward.

25 to 29 are measurements related to the push-up mechanisms 104, 350 (the latter being described below), with various adjustments at different heights and similar measurements to the push-up mechanism 602. show. The measured values are the push-up angle 394, the slot angle 396, and the distance between the parallelogram swivel shafts 354 and 358 or between the parallelogram swivel shafts 352 and 356, and such distances are mutually exclusive. The distance when they are equal and the distance between the parallelogram swivel shafts 356 and 358 or between the parallelogram swivel shafts 352 and 354, and when such distances are equal to each other, and the push-up spring end. The distance between the swivel shaft 366 and the main swivel shaft 352 is included. The angle, called the "slot angle", may relate to a series of holes. The distance between the parallelogram swivel shafts 354 and 358 or between the parallelogram swivel shafts 352 and 356 will be referred to as the parallelogram short link length 398, with the parallelogram swivel shafts 356 and 358. The distance between the parallelogram swivel shafts 352 and 354 will be referred to as the parallelogram length link length 400. The distance between the push-up spring end swivel shaft 366 and the main swivel shaft 352 will be referred to as the end swivel shaft distance 402.

The push-up angle 394 is a line connecting the upper push-up spring swivel shaft 364 and the push-up spring end swivel shaft 366 (that is, the spring shaft 148) and a line connecting the push-up spring end swivel shaft 366 and the main swivel shaft 352. The angle between. The line 402 between the push-up spring end swivel shaft 366 and the main swivel shaft 352 functions as a "virtual lever arm" or "lever arm" on the parallelogram 382. The slot angle 396 is an angle between a line connecting the upper push-up spring swivel shaft 364 and the push-up spring end swivel shaft 366 and a line in which the push-up spring end swivel shaft 366 can be adjusted in the slot 368. The slot angle 396 only indicates a potential path for the push-up spring end swivel shaft 366 as the length of the lever arm 402 changes.

FIG. 25 shows an embodiment in which the parallelogram is horizontal or nearly horizontal. The 2.27 inch lever arm 402 is shown at a push-up angle of 394 at 115 °. An exemplary range of lever arm length positions includes 1.0 inch to 4.0 inch and 2.0 inch to 3.0 inch. Exemplary adjustment amounts include 0.75 inch to 1.25 inch and 0.9 inch to 1.0 inch.

Regarding the seating configuration of the chair cushion, as shown in FIG. 25, this oblique push-up angle sufficiently reduces the effective spring force so that the chair cushion at its lowest position and its vicinity is iso-elastic or nearly iso-elastic. Bring.

For example, as shown in FIG. 26, the push-up mechanism 104 substantially sets the rear seat portion 118 relative to the horizontal when the seat portion is in a lower position, since the extension portion 150 remains horizontal. Raise while maintaining a horizontal position or a selected angled state. The push-up mechanism 104 also moves the seat 114 forward. The front seat portion 116 tilts downward as the central portion 120 moves away from the position supporting the front seat portion 116 and the rear seat portion 118 positioned on the seat surface when shifting to the upright mode. Moving the seat 114 backwards may result in different optimum push-up angles. The pushing force required to push forward is generally less than the pushing force required to push backward. This is when the user of the push-up chair 100 reaches a higher position, rather than being still well-supported as in the case of a backward push-up that could tilt the user back. This is because the weight will be applied to the foot as a whole or almost entirely.

In an exemplary embodiment, a pushing force of 50% to 70% of the user's body weight is used. This range may be suitable for use with, for example, a push-up chair with armrests that the user can push down. In the absence of armrests, the optimal pushing force is even greater, which can be, for example, 70% to 95% or more of the seated person's weight.

FIG. 26 shows the push-up mechanism 104 at its highest parallelogram range of motion. Using the same 2.27 inch lever arm, the push-up angle 394 is reduced to 61 °. This is slightly above the most efficient angle (90 °) in this embodiment. This is suitable for a "forward" push-up parallelogram, as it may be necessary to reduce the push-up capacity as it approaches the highest position.

The diagonal push-up angle 394 when the push-up mechanism 104 is at its highest position is such that the push-up force of the load is balanced or nearly balanced, and thus "isoelasticity" or almost "isoelasticity". Reduce sufficiently.

FIG. 26 shows a slot angle of 396 at 89 degrees. This deviates considerably from the lever arm push-up angle of 115 degrees. This slot angle 396 is selected because the movement of the fully extended spring 142 is completed at about the same height regardless of the adjusted position in slot 156. In fact, if slot 156 is curved (and has a lead screw on the swivel axis), any position along slot 156 can coincide with the final extension of the spring 142. Therefore, any push-up adjustment may result in the same height with respect to the seat 114.

27 and 28 show the low range of motion and the high range of motion of the parallelogram 382, respectively. 27 and 28 show the lever arm 402 and the spring shaft 148 when adjusted to minimize push-up (with the spring swivel shaft installed as far back as possible towards the rear of this embodiment). The resulting push-up angle 394 is shown. Note that in the seated position, the spring 142 is pushed up against the highly efficient approximately 90 ° lever arm 402 at a push-up angle of 394 at 97 °.

At the high "limit" position, with minimal adjustment along slot 156, the push-up angle 394 becomes an inefficient 45 ° and the seat 114 is pushed forward too vigorously, as shown in FIG. Please note that it prevents. Not only is it harmful to throw the occupant out of the chair, but the force required to start the seat / cushion descent can cause the entire chair to bounce backwards as the person attempting to sit approaches. Because it is, it is important.

In an exemplary embodiment, for example, the embodiments shown in FIGS. 25-28, there is a push-up mechanism 104 under the seat 114. Using this same push-up shape, for example, as shown in FIGS. 29-32, the push-up mechanism is divided into two cooperative push-up parallelograms positioned on either side or both sides of the push-up chair. You can push up the seat / cushion with. The push-up mechanism 104 incorporates a central spring 142 or a group of adjacent springs arranged between two parallelograms 124. The push-up mechanism 350 may each be interlocked with a parallelogram 382 and may include two springs 362 on opposite sides of the push-up mechanism 350, with a single spring 362 interlocked with a single parallelogram 382. It may be constructed.

The rear end blocks 422 of the parallelogram 382 are interconnected by a cross tube or bar 426, as shown in FIGS. 35 and 36. A flange may be provided to support a rear cushion, such as the component 359 shown in FIG. 35. Note that the spring 362 may be of the same type as the spring 142.

The swivel axis of the parallelogram 382 is designated as 352, 354, 356, 358 and the main swivel axis is referenced by reference number 352, although the configuration of the parallelogram link and adjustment mechanism is disclosed herein. It will be appreciated that it may differ from other push-up mechanism embodiments.

In an embodiment of the push-up mechanism 350, the foundation frame 406 includes front parallelogram end blocks 408 on both sides of the cushion when the seat 410 is in seating mode. The central seat support portion 120 is fixed to the lateral connecting floor 412 of the foundation frame 406. The lateral connection floor 412 connects the side walls 414 and 416 to the base frame 406. Although referring to cushions, similar push-up mechanisms with seating and standing modes can be constructed without cushions and instead any surface sufficient to support the user in a reasonably comfortable manner. Can be provided. It should also be noted that the cushion can be integrated with the push-up mechanism support portion. "Integral" means that the cushion is permanently or removablely attached to the seat support portion of the push-up mechanism.

In the integrated cushioning form of the push-up mechanism 350 embodiment, the central seat portion 120 also serves to fill the folding section adjacent to the contact portion of the front seat portion 116 and the rear seat portion 118 in the seated position. .. Unlike other disclosed forms in which the push-up mechanism 350 is located below the center of the seat 114 and must push up the center of the cross section 120 as the parallelogram rises, the push-up parallelogram 382 is open on both sides. The central seat portion 120 can be kept fixed in an appropriate position with respect to the lateral connecting floor 412. "Launching the parallelogram 382" means that the parts of the parallelogram 382 may stand up, but not all parts will stand up. For example, in FIG. 26, the swivel shaft 354 may remain in place and some of the lowest links of the parallelogram 382 may even extend below its original position.

FIG. 29 shows a push-up mechanism 350 in which the links of the parallelogram 382 are horizontal (such as in an exemplary seating position) and have a series of arcuate holes 424 for adjusting the position of the spring end 366. The arc of the hole 424 has a radius equal to the length from the spring end point to the spring swivel shaft 364 instead of the slot 368 when the spring 142 is fully extended. Although the hole 424 forms an arc, the center of the hole can be used to closely approximate the points to form a half-line that defines the slot angle 368. As described above, the slot angle 368 is shown in FIGS. 29, 31, and 32 for an approximate comparison with the configuration having the adjustment mechanism including the slot 368. The "slot angle" 396 is 150 ° in the embodiment of FIG. The length of the lever arm 402 is shown to be 2.27 inches and the push-up angle 394 is 115 °, which extends here between the lower parallelogram swivel shaft 352 and the second farthest hole from the rear ( The farthest hole will provide additional push-up). The slot angle 396 is the same regardless of in which hole the push-up spring end swivel shaft 366 is positioned.

Since the spring swing shaft 364 is at the center of the arc of the hole 424 only when the spring 142 is fully extended, the hole position of the push-up spring end swing shaft 366 should be changed only when the spring 142 is fully extended. The effective pushing force can be adjusted by. This is illustrated by comparing FIG. 29 with FIG. 30. In FIG. 29, the push-up mechanism 350 is at its lowest position and the spring 142 is compressed. The spring swivel shaft 364 is not at the center of the arc in which the hole 424 is located. Therefore, in the lowest mode, the spring 142 cannot rotate in alignment with each of the holes 424. FIG. 30 shows the push-up mechanism 350 at the highest position. The spring 142 is fully extended and the spring swivel shaft 364 is at the center of the arc in which the hole 424 is located. In this configuration, the spring 142 can rotate about the spring swivel shaft 364 and align with any of the holes 424, so that the push-up force can be adjusted.

FIG. 30 shows the push-up mechanism 350 in the ascending position. The rear seat portion 118 is held in a horizontal position because the extension portion 359 remains horizontal. The extension 359 may also be designed to maintain a given or selected angle from the horizontal. The extension 359 operates in much the same way as the extension 150. As the front seat portion 116 and the rear seat portion 118 move away from the stationary central seat portion 120, the front seat portion 116 naturally descends downward to allow the user to move to an upright position. .. The front seat portion 116 and the rear seat portion 118 may be connected by a hinge made of a hard or soft material or a combination of the two types of materials. For example, a material such as cloth, leather or vinyl can connect the front portion 116 and the rear portion 118 and allow the front portion 116 to descend downward while still attached to the rear portion 118. In addition to this, or separately, a swivel shaft such as the swivel shaft 122 shown in FIG. 5 may be used in the embodiment. For brevity, the front seat portion 116, the rear seat portion 118 and the center seat portion 120 include cushioning parts, upholstered parts or foundation parts, but such individual parts may also be identified separately. Please note. The seat 114 includes a front seat portion 116, a rear seat portion 118, and a central seat portion 120.

The hole 424 may be incorporated into the rear end blocks 422 on both sides of the push-up mechanism 350. Separately, the hole 424 may be used for one end block 422, or slots and pegs may be used for the opposite end block 422. See FIG. 42 for an exemplary spring mandrel pin 432. Alternatively, if only one parallelogram 382 push-up structure is used, a series of arcuate holes 424 are used for a single end block 422. The radius 428 of the arc of the hole 424 of this embodiment extends from the spring (elastic member) swivel shaft 364 to the push-up spring end swivel shaft 366 that coincides with the selected hole 424. In an exemplary embodiment, the radius 428 is the distance from the center of the swivel shaft 364 of the spring 362 or the swirl shafts 364 of the springs or the springs fully extended when the parallelogram 382 rises to its maximum height to the center of the swivel shaft 366. Equal to 10.5 inches. An exemplary radius range is 9 to 12 inches.

An effective push-up force pulls the spring mandrel pin 432 out of the selected hole 424 and swings the spring 362 upward towards a further anterior hole (increasing strength) or further rearward hole (decreasing strength). It can be adjusted by swinging down towards another hole 424. In the configuration where the push-up mechanism 350 has springs 362 on both opposite sides, the holes 424 remain aligned and the spring mandrel pin because the facing springs still hold the seat / cushion raised to the same height. The 432 can be inserted into any hole. The opposite spring mandrel pin 432 can then be rearranged while a nearby person maintains the seat / cushion at maximum height. This alternative double-sided adjustment procedure provides a vernier effect, as adjusting with one hole on one side halves the push-up change when repositioning both spring mandrel pins 432. This feature may provide a convenient way to select sufficient fine-tuning over a wide range of push-up settings.

FIG. 31 shows how the minimum push-up position of the spring mandrel pin 432, that is, the rearmost hole position, affects the push-up angle 394 with respect to the spring shaft 148. In the rearmost position, the spring 362 powers against the relatively short 1.56 inch lever arm 402, thus deviating from the isoelasticity caused by lowering the aspect ratio of the push-up triangle. To counteract, push with an inefficient push-up angle of only 39 degrees. On the three sides of the "push-up triangle", 1) the length of the spring 362, that is, the distance from the push-up spring swivel shaft 364 to the push-up spring end swivel shaft 366, and 2) the push-up spring end swivel shaft 366 to the main swivel shaft 352. And 3) The distance from the main swivel shaft 352 to the push-up swivel shaft 364 is included. This adjusting mechanism causes a variation of approximately 2: 1 in the push-up power from the frontmost hole 424 to the rearmost hole 424.

It should be noted that the specifications provided, such as push-up angle, slot angle and lever arm length, are for illustration purposes only. Such specifications may be modified, for example, to accommodate users of different weights and abilities.

The effective push-up power can be selected to allow the seated person to supplement his or her ability to rise from the seated position of the chair having the push-up mechanism 350. For example, using an exemplary spring force of 3200N at a 50% progression rate, this adjustment range should push up about half of a person's body weight between 100 and 200 pounds, a low armchair, or a push up. It empowers a person to easily stand up from another device or furniture that incorporates the mechanism 350. An exemplary spring force range is 3000N to 3500N. The range of exemplary force travel from fully extended to fully compressed is 45% to 55%. In an exemplary embodiment, the spring 362 has a stroke in the range of 75 mm to 85 mm and an uncompressed length in the range of 200 mm to 275 mm. The spring 362 may be, for example, a compression spring such as a gas spring. Other exemplary types of springs include tension springs (which would need to be deployed facing each other on a parallelogram to provide equivalent push-up forces).

In this exemplary embodiment, for example, a suitable small diameter gas spring in the range of 23 mm to 28 mm in diameter may fit within the narrow parallelogram mechanism on either side of the folding cushion. When the rear seat portion 118 stands up, the rear seat portion 118 can be attached to the loose packaging material of the cushion cloth (not shown) at the rear end. The packaging material will also be attached to the lower end of the backrest so that the push-up mechanism is hidden and protected even when it is upright.

FIG. 32 shows how the minimum push-up position of the spring mandrel pin at the rearmost hole position affects the push-up angle with respect to the spring shaft, with a push-up angle of 98 degrees 394 and a "slot angle" of 153 degrees. 396 is provided.

FIG. 29 shows an exemplary shape of the push-up mechanism 350, with the push-up spring end swivel shaft in the frontmost hole, the mechanism in the seated position, and an exemplary lever arm length 402 of 2.27 inches. ..

As shown in FIG. 33, a restraint panel 404 may be provided to control or support the control of the position of the front seat portion 116 of the standing seat 410. The restraint panel 404 may be mounted between the front lower edge of the front seat portion 116 and a suitable point, in this exemplary case, the apex of the central seat portion 120, so that the restraint panel 404 is The front seat portion is fully folded downwards to keep the seater's knees out of the path over the entire range of motion above and below the seat 410. In an exemplary embodiment, the restraint panel 404 is a non-stretchable material and may be a cloth or other flexible material.

An exemplary height 392 of the seating surface above the ground is shown in FIGS. 25, 29 and 31. They are 13.28 inches, 5.83 inches and 18.24 inches, respectively. The height of 5.83 inches shown in FIG. 29 corresponds to the seating height, whereas the height shown in FIG. 31 corresponds to the ascending height. The thickness of the cushion may vary and the disclosed push-up mechanism can be configured to be used without the cushion, so the important distance is from the lowest to the highest push-up position of the seat height. It is a change of. An exemplary vertical distance position change from sitting mode to standing mode is a change from 8 inches to 16 inches and a change from 11 inches to 13 inches.

FIG. 33 shows a restraint panel 404 extending between a point or edge "A" and "B". The points or edges "A" and "B" are selected so that the restraint panel 404 exerts a restraint function, maintains tension over the entire range of motion of the push-up mechanism 350, and is located below the seat 410 in the seated position. ..

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

FIG. 35 shows an isometric view of the push-up mechanism 350 and the seat 410 in the raised position. In this embodiment, the restraint panel 404 has a mounting length along the front lower edge of the front seat portion 116 and the apex of the central seat portion (“wedge”) 120.

The opposing push-up parallelogram 382 with the incremental "hole" adjustment mechanism 430 has an uncompressed spring extending parallel to the bottom hole, and if necessary, looks like a conventional chair cushion and "functions". With the seat 410 being created, the spring mandrel pins 432 can be removed from both sides to allow the front seat portion 116 and the rear seat portion 118 to be flattened or flattened as intended. This configuration may also be suitable for transferring and rearranging the push-up mechanism to another chair or other device.

In an exemplary embodiment, for setting and restoring to push-up chair mode, one spring mandrel pin 432 may engage the spring cap 434 through any hole 424 to obtain the required amount of push-up. It would only be necessary to push up the rear seat portion 118 until possible and then rearrange the spring mandrel pins 432 alternately from one side to the other.

FIG. 36 shows an isometric view of a push-up mechanism 350 with a seat 410 in folding mode for additional visualization of the device. As described above, the bar 426 connecting the opposing push-up mechanisms 350 is shown. The bar 426 can support the device and maintain the position of the opposing push-up mechanisms 350 with respect to each other. Even if only one push-up mechanism 350 is present in the push-up device, the bar 426 may further provide structural support and maintain the integrity of the relative position of the opposite frame component or other component.

FIG. 37 shows an exemplary embodiment of a push-up mechanism 502 having a linearly adjustable spring-terminated swivel shaft 504. The spring end swivel shaft 504 is adjustable along slot 506. The slot angle may be increased or decreased by a conventional feed screw, eg, a feed screw rotated by a folding crank 508. FIG. 37 shows an embodiment with linear slots 506. The slot may also be arcuate, with the remaining push-up mechanism components appropriately modified to allow the spring-terminated swivel shaft 504 to be adjusted by the arcuate slot.

The push-up mechanism 502 includes an extension 524 for maintaining the angle of the rear seat portion 118, similar to the extensions 150, 359, 616.

38 and 42 are isometric views of the push-up mechanism 502 shown in FIG. 37, and the side surface of the rear end block 522 is rendered transparently. FIG. 39 further shows a spring termination adjusting mechanism 520 (also referred to as a “push-up strength adjusting mechanism”). FIG. 38 shows a lead screw 510 arranged between both sides of the end block 522. The moving nut 512 can be moved along the feed screw 510 to adjust the location of the spring end swivel shaft 504. The moving nut 512 has an integrated horizontal shaft 514 on both sides that engages the yoke 516 (for ease of mounting). The spring end swivel shaft 504 is also engaged with a yoke 516 or a component attached to the yoke. The holding screw 518 captures the integrated horizontal shaft 514. The folding crank 508 used to adjust the position of the moving nut 512 is shown in the folded position.

When the crank 508 is unfolded and rotated, the attached feed screw 510 rotates, and the moving nut 512 and the captured spring end swivel shaft 504 move the feed screw 510 between the minimum push-up strength position and the maximum push-up strength position. Move up and down. The same push-up strength adjusting mechanism 520 may be used on both sides of the device. Each push-up strength adjusting mechanism 520 may be adjusted separately for push-up, and can be advantageously adjusted in the vicinity of the position along each slot. Therefore, in this form, vernier (continuous) adjustment may be provided instead of incremental adjustment.

Except for a series of arcuate holes for a straight slot, the push-up shapes of the embodiments listed here may be the same or substantially the same. The incremental hole adjustment mechanism 430 and the linearly adjustable spring end swivel shaft 504 may be used in the push-up mechanism 350, respectively. The weak and strong push-up positions on the half-line that define the push-up angle with respect to the spring axis and the slot angle (which effectively adjusts the aspect ratio of the push-up triangle operating within the parallelogram link mechanism) are functional. May be the same.

Another push-up shape may be used for the push-up mechanism. The optimum push-up angle 394 with respect to the spring shaft 148 and the slot angle 396 defined above are also used to apply force between various other links and elements inside and outside the push-up parallelograms 124, 382. It can be set effectively. The push-up mechanisms 104, 350 and 502 apply a push-up force between the rear-end blocks 170, 422 (or the inner extension of the rear-end block) and the opposing lower parallelogram links.

However, the push-up mechanism 602 shown in FIGS. 40 and 41 has an alternative push-up shape that operates according to the same principles as described above. The spring exerts a force between the base and the rising lower link. FIG. 40 is an isometric view of the push-up mechanism 602 to which a seat cushion other than the support wedge-shaped portion (central seat cushion) 120 shown on the fixed frame base 610 is not attached. FIG. 41 is a side view of the push-up mechanism 602 depicted with the seat cushions 116 and 118 attached. 40 and 41 show a parallelogram 604 with an adjusting mechanism 606. The adjusting mechanism 606 is positioned at the end of the link 608 of the parallelogram 604. This end remains connected to the stationary frame base 610 as the push-up mechanism rises. The angle of the extension 616 with respect to the horizontal or the same angle that is horizontal is maintained when the push-up mechanism 602 rises or falls.

The adjusting swivel shaft pin 612 is inserted into the lowest hole of the holes 614, and the opposing push-up mechanism 602 makes the lever arm as short as possible for this exemplary embodiment (hence the push-up triangle). Has the lowest aspect ratio). Other details of this push-up shape are the same as in the exemplary embodiment described above.

Most or all of the disclosed push-up mechanisms are more easily adjusted when the gas spring is fully extended. The unique shape makes it suitable when the spring end swings along the optimal continuous hole arc or along a continuous adjustment mechanism for stepwise adjustment of push-up. Performance is obtained.

The effect of the structure described follows the same design as in the exemplary embodiment, but is achieved, for example, in an embodiment in which the spring 142 or 362 rotates so as to project rearward of the push-up chair 100 or push-up mechanism 104, 350 or 602. May be done. See, for example, FIGS. 40 and 41.

The disclosed push-up mechanisms 104, 350, 602 and the reverted configuration of the push-up mechanism as described in the previous paragraph are devices other than the illustrated chairs, such as wheelchairs or elevating push-up chairs. (For example, the subject of US Patent Application No. 62 / 649,746, filed March 29, 2018, entitled "Elevating Walkchairs, Push-Up Mechanisms and Seats", the content of which is the book. It may be used as (incorporated in the specification). In addition, it may be used for chairs incorporated in other systems such as vehicles or machines.

Although the figure shows parallelograms 124, 382, 604 with four links, similar push-up parallelogram configurations may have fewer links or different link shapes.

43-56 show an exemplary elevating walkchair 700 that can incorporate any of the push-up mechanisms disclosed herein. The elevating walking chair 700 has a seating mode in which the seat or saddle 718 is in the lowered position, and a standing mode or walking mode in which the seat 718 stands up and allows the seated person to walk while being supported by the elevating walking chair. ..

43 to 56 show a pushing mechanism having springs on the opposite right / left side of the elevating walking chair 700, which is substantially the same as the pushing mechanism 350. Other push-up mechanisms such as the double spring push-up mechanism 602 or the single spring push-up mechanism 104 can also be incorporated into the elevating push-up chair.

As most clearly seen in FIGS. 49C and 50C, the push-up mechanism 736 comprises a parallelogram structure 738 with a link 759 parallel to the link 756. Parts of the end block 734 and frame 702 are provided for the other "links" of the parallelogram 738. The parallelogram links 756 and 759 swivel around the swivel shafts 745 and 746 of the end block 734. The parallelogram links 756 and 759 further swivel around the swivel shafts 747 and 749 on the frame 702. The term "parallelogram" is used for structure 738, although the links 756, 759 need not be straight and perfectly parallel, but the straight line connecting the swivel axes 745, 746, 747, 749 is a parallelogram. Note that it forms.

FIG. 43 is a front isometric view of the elevating push-up chair 700 in the lower seating mode. The elevating push-up chair 700 has a frame 702 to which various components can be directly attached, indirectly attached, or integrally attached. In the exemplary embodiment of FIG. 43, the frame 702 comprises a lower frame component 704 to which the wheels 706 are attached. The frame 702 is attached to the lower frame component 704 and includes a back component 708 that extends upward from the frame component. The armrest 710 is attached to the back component 708. An optional footrest 788 is attached to the frame 702 with a footrest swivel shaft 790. The footrest 788 has two or more standard positions, for example, a folded position as shown in FIGS. 43-46 and a 90 degree swivel position to accommodate the user's foot when sitting. You may. A footrest rotation mechanism for limiting the rotation of the footrest 788 on the swivel shaft 790, for example, a rotation limiting stop at the two described positions may be used. Other footrest rotation mechanisms may be provided to provide additional selection of positions.

Wheel 706 is an elevating push-up chair via a two-stage caster, as described in International Patent Application No. PCT / US2017 / 060163, filed November 7, 2017 and incorporated herein by reference. It may be incorporated in 700.

The frame 702 has a maximum height adjusting mechanism 712. In the exemplary embodiment shown in FIG. 43, the maximum height adjustment mechanism 712 includes a height adjustment bar 714 with a series of height adjustment holes 716 for selecting the height of the seat 718. The maximum height adjustment pin 720 can be inserted into one of a series of height adjustment holes 716 and fixed at the desired height. The maximum height adjusting mechanism 712 and the procedure will be described in more detail below. The maximum height adjustment mechanism 712 may provide both a support function and a height adjustment function.

As seen in FIGS. 43 and 48, the height adjusting bar 714 is slidably arranged within the height adjusting sleeve 754. The height adjusting sleeve 754 is attached to the parallelogram structure 738 by a link 756. Therefore, when the angle of the parallelogram 738 changes and the elevating push-up chair 700 is moved up and down, the height adjustment sleeve 754 moves the height adjustment bar 714 up and down. The height adjusting pin 720 limits the range of motion of the height adjusting sleeve 754 along the height adjusting bar 714 when the elevating push-up chair 700 stands up. As can be seen in FIG. 48, the height adjusting sleeve 754 is provided when the height adjusting pin 720 is in the highest hole of the height adjusting holes 716 or when the height adjusting pin 720 is not inserted into the hole. When the elevating push-up chair 700 is at its highest possible height, it can stand up to the highest possible position on the height adjustment bar 714. By inserting the height adjusting pin 720 into the lower hole, the push-up chair 700 is limited to a lower maximum height.

The sleeve 754 may have internal wheels to facilitate sliding along the height adjusting bar 714. Other means for improving sliding may be used alone or in combination with wheels, such as materials such as Teflon®, ball bearings or other conventional mechanisms.

In addition to setting the maximum height by inserting the height adjusting pin 720, the height of the seat 718 may be set to a specific intermediate height within the range from the lowest height to the highest height. An intermediate height adjustment mechanism 760 may be used to set the height adjustment sleeve 754 at an intermediate location along the height adjustment bar 714. For example, the height adjustment sleeve 754 is also pulled out from one of the parts for fixing the sleeve along the height adjustment bar 714, for example, the height adjustment hole 716, and reinserted into another hole. It may be interlocked with a spring-loaded or non-spring-loaded pin that can be used. Another form of intermediate height adjusting mechanism 760 may be adopted. In general, the intermediate height adjusting mechanism 760 provides means for temporarily fixing the height of the height adjusting sleeve 754 along the height adjusting bar 714.

58A to 58B and 59A to 59B show an exemplary intermediate height adjusting mechanism 760. FIG. 58A shows an elevating pedestrian chair 700 with an intermediate height adjustment mechanism 760 and a seat 718 at the lowest position. FIG. 58B is a close-up of detail portion K from FIG. 58A before selecting the height of seat 718. FIG. 59A shows an elevating pedestrian chair 700 with an intermediate height adjustment mechanism 760 with seats 718 fixed at a selected height. FIG. 58B is a close-up of the detail portion K from FIG. 58A showing the intermediate height adjusting mechanism 760 engaged to fix the height of the seat 718. The intermediate height adjusting mechanism 760 includes an intermediate height adjusting pin 770 that can be inserted into the sleeve hole 772 of the sleeve 754. The sleeve 754 can move along the height adjustment bar 714 until the sleeve hole 772 is aligned with the selected hole of the height adjustment holes 716 of the height adjustment bar 714. An intermediate height adjusting pin can then be inserted through the sleeve hole 772 into a selected hole in the height adjusting hole 716 to fix the height of the seat 718. Other conventional means for operably fixing the parallelogram link 756 along the height adjustment bar 714 can be used as the intermediate height adjustment mechanism.

64A-64B show height adjusting sleeves 754 attached to the end block 734 instead of being attached to the parallelogram structure 738 at links 756 as shown in FIG. 56. The height adjusting sleeve 754 can be attached to various parts of the parallelogram structure 738. The height of the seat 718 can be controlled by aligning the height adjusting sleeve 754 with respect to the push-up mechanism.

The height adjustment "sleeve" has been mentioned, but other configurations that allow the adjustment part to slide up and down along the height adjustment bar 714 or otherwise move up and down. Can be used. The "sleeve" does not have to surround the height adjustment bar 714 as a whole. The intermediate height adjusting mechanism 760 may be configured to adjust the left and right intermediate height mechanisms at the same time. For example, the parallel intermediate height adjustment component may include a cable to harmonize the right / left adjustment.

It should be noted that the "height adjustment" is different from the adjustment provided by the push-up mechanism 736 described below. The maximum height adjustment provides a maximum height that defines the range of motion generated by the push-up mechanism from sitting mode to standing mode.

FIG. 44 is a rear isometric view of the elevating walking chair 700. An exemplary embodiment of FIG. 43 incorporates a folding mechanism 722. This folding mechanism will be described in more detail below with reference to FIGS. 60 to 63.

FIG. 45 shows an isometric view of the elevating walking chair 700 in the ascending position or the standing position. In the ascending position, the user may be supported by the seat / saddle 718 while walking with leg strength and movement. An upright arm support 732 is provided that can accommodate the user in a comfortable and supportive manner when the elevating push-up chair is in the upright position. Since the support arm 732 is attached to the end block 734 of the push-up mechanism 736, the seat 718 is raised when it is raised by the push-up mechanism 736. The support arm 732 may be configured to extend when the elevating push-up chair 700 stands up, or may be incorporated into the elevating push-up chair 700 and manually deployed.

57A-57C show an exemplary arm support adjustment mechanism 768. FIG. 57A is a side view of an exemplary elevating walking chair 700 having a support arm adjusting mechanism 768. FIG. 57B is a detailed view of a portion O of FIG. 57A. FIG. 57C is a cross-sectional view of the arm support adjusting mechanism 768 passing through the line PP of FIG. 57B. The upright arm support 732 is pivotally attached to the end block 734 by the arm support swivel shaft 762. The arm support adjustment mechanism 768 locks the upright arm support 732 to the selected position. The arm support adjustment mechanism 768 includes an upright arm support adjustment pin 764. This pin is positioned in the recess 766 for the standing arm support adjustment pin and can be pulled out from the recess. The arm support adjustment pin 764 may be spring-loaded. When the arm support pin 764 is pulled out of the support pin recess 766, the upright arm support 732 may rotate around the arm support swivel shaft 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 rotational position. When the arm support pin 764 is pulled out of the arm support pin recess 766, the upright arm support 732 may rotate around the arm support swivel shaft 762. The standing arm support adjusting mechanism 768 may be provided on both the left and right standing arm supports 732. Other conventional means for adjusting, locking, and disengaging the angular position of the standing arm support 732 may be used as the standing arm support adjusting mechanism.

The push-up mechanism 736 has a parallelogram structure 738 with a spring 740 as shown in FIG. 49C. The spring 740, together with a portion of the parallelogram structure 738, forms a push-up triangle. The push-up triangle has a first side defined by the length of the spring 740 from the spring swivel shaft 742 to the spring end point 744 and a second side defined by the line from the spring swivel shaft 742 to the main swivel shaft 746. And a third side from the main swivel shaft 746 to the spring end point 744. The location of the spring end swivel shaft 744 can be adjusted along a series of spring end holes 748 to change the effective push-up force. Adjusting the location of the spring end swivel shaft 744 reduces the third side of the push-up triangle, the distance 750 from the main swivel shaft 746 to the spring end point 744, or the distance sometimes referred to herein as the "lever arm". Will be or will be extended. The effective pushing force increases as the length of the lever arm 750 increases. The pushing force can be adjusted according to the weight of the seated person.

FIG. 46 shows an isometric rear view of the elevating walking chair 700 in the standing position.

FIG. 65 shows an isometric view of a portion of an elevating pedestrian chair with a seat 718 attached to a single central push-up mechanism 736. The seat 718 and the push-up mechanism 736 may be attached to a frame similar to the frame 702. The seat 718 equipped with the central push-up mechanism 736 as shown in FIG. 65 may also be used in other devices. Although seat 718 is depicted as a saddle in favor of an elevating walker, seat 718 may have other configurations compatible with the type of seating device incorporated.

47A, 47B to 52A to 52B show exemplary push-up adjustment procedures. If there are opposing push-up and adjusting mechanisms, the step is performed on one side of the elevating push-up chair 700 and then on the opposite side of the elevating-type push-up chair 700.

47A and 47B show the first step of the pushing force adjusting procedure. FIG. 47A is a front isometric view of the elevating walking chair 700 in the standing position. FIG. 47B is an enlarged view of a detailed portion A showing a part of the push-up adjustment mechanism 758 which is a part of the push-up mechanism 736. The push-up adjustment mechanism 758 includes a push-up adjustment pin 752 and a series of spring end holes 748 arranged in the end block 734. The push-up adjustment pin 752 is first removed from the hole in the spring end hole 748. As a result, the elevating push-up chair 700 is raised to its maximum height position as shown in FIG. 48, and since the spring 740 is in the maximum extended state, the force applied by the spring is reduced or removed. As a result, since the spring swivel shaft 742 positions the spring end hole 748 in an arc shape at the center thereof, the spring 740 can swivel to any one of the spring end holes 748. This is illustrated by comparing FIGS. 43 and 45. In FIG. 43, the elevating walking chair 700 is in the lowest seating position and the spring 740 is compressed. The spring swivel shaft 742 is not at the center of the arc in which the spring end hole 748 is located. Therefore, in the seating mode, the spring 740 cannot rotate in alignment with each of the spring end holes 748. FIG. 45 shows the elevating walking chair 700 in the highest upright position. The spring 740 is fully extended, the spring swivel shaft 742 is at the center of the arc, and the spring end hole 748 is arranged along this arc. In this configuration, the spring 740 can rotate about the spring swivel shaft 742 and is aligned with any of the spring end holes 748, so that push-up adjustment can be performed.

Recall that the "maximum height position" is determined by the setting of the maximum height adjustment mechanism 712. The push-up force adjusting mechanism 758, on the other hand, sets a force that causes the seat 718 of the elevating walking chair to move up and down.

49A-49C show the next step of the push-up force adjusting procedure. FIG. 49B shows a side sectional view of the elevating push-up chair 700 acquired through line BB of FIG. 49A passing through the spring 740. FIG. 49C is an enlarged view of the detail portion C of FIG. 49B. FIG. 49C shows a spring termination swivel shaft 744 in one of the spring termination holes 748 creating the shortest lever arm 750 for this embodiment.

50A, 50B and 50C are similar to FIGS. 49A-49C, but are obtained from cross sections DD of FIG. 50A. Section DD provides a side view of the spring 740 and the push-up adjustment pin 752.

51A and 51B show the next push-up force adjusting step. 51B is an enlarged view of the detailed portion F of FIG. 51A. The push-up adjustment pin 752 is removed from one of a series of spring termination holes 748. As a result, the spring 740 can freely rotate around the spring swivel shaft 742 inside any of the other spring end holes 748 to adjust the pushing force.

52A and 52B show the next step of the pushing force adjusting procedure. 52B is an enlarged view of the detailed portion G of FIG. 52A. Since the spring 740 rotates about the spring swivel shaft 742, the end of the spring 740 can be located to form the spring end swivel shaft 744 in another hole of the series of spring end holes 748. .. The push-up adjustment pin 752 is inserted into the hole to create the spring end swivel shaft 744. By this adjustment, for example, the lever arm 750 is enlarged as compared with the length of the lever arm 750 shown in FIG. 49C. In other words, the distance between the spring end swivel shaft 744 and the main swivel shaft 756 increases, which in turn increases the effective pushing force.

53A and 53B to 56 show the height adjustment procedure. FIG. 53B is an enlarged view of the detail portion H of FIG. 53A. In FIGS. 53A and 53B, the elevating push-up chair 700 is positioned at its lowest height, and the height adjusting pin 720 is located in the highest hole of the height adjusting holes 716 of the height adjusting bar 714. The initial configuration of the chair 700 is shown.

53A and 53B show the elevating push-up chair 700 in which the height adjusting pin 720 is in the highest position and in the lowest position. 54A, 54B show a first height adjustment step for changing the maximum height that the elevating push-up chair 700 can achieve for this exemplary embodiment. FIG. 54B is an enlarged view of the detail portion H of FIG. 54A. The height adjusting pin 720 is shown as having been removed from one of the height adjusting holes 716 into which the pin has been inserted.

55A, 55B show the next height adjustment step of this exemplary embodiment. FIG. 55B is an enlarged view of the detail portion J of FIG. 55A. The height adjustment pin 720 is reinserted into the lower hole of the height adjustment holes 716. As a result, the range of motion of the height adjusting sleeve 754 along the parallelogram link 756 is limited by the height adjusting pin 720, so that the maximum height of the elevating push-up chair 700 is set to a lower height.

FIG. 56 is a side view of the elevating pedestrian chair 700 showing that the height adjusting pin 720 prevents the height adjusting sleeve 754 from fully rising along the height adjusting bar 714. This acts against the pushing force of the spring 740 and limits the elevating walkchair 700 from reaching maximum height.

It should be noted that the push-up adjustment mechanisms 758 and height adjustment mechanisms 712,760 on both sides of the elevating walkchair 700 may require the adjustments described herein to be performed on both sides. In another embodiment, the adjusting mechanism may be provided on only one side, provided that the elevating walkchair and the adjusting mechanism component are durable enough to enable the one-sided mechanism.

Returning from FIG. 60 to FIG. 63, a folding mechanism 722 arbitrarily included in the elevating walking chair 700 is shown. FIG. 60 is an isometric rear view of the foldable elevating walking chair 700. FIG. 61 shows a front view of the partially folded elevating walking chair 700. FIG. 62 is a rear isometric view of the elevating walking chair 700 in the folded position. FIG. 63 is a front view of the elevating walking chair 700 in the folding mode.

The folding mechanism 722 includes a pair of lower crossbars 724 and a pair of upper crossbars 726, each of which is connected to a central upright part 728 and is foldable relative to the part. A locking mechanism 730 is provided to lock the structure of the elevating push-up chair 700 in the open position for use and to release it for folding. The locking mechanism 730 may also lock the elevating walking chair in the folded position. The seat 718 may also be vertically foldable, either manually or automatically, when the lower crossbar 724 and the upper crossbar 726 are folded towards the central upright part 728.

In the exemplary folding mechanism 722, the elevating walking chair 700 is in a sitting mode when folded, as in the mode shown in FIG. In an additional embodiment, the elevating pedestrian chair 700 may be in the upright mode when folded. Locking can be initiated by pulling the locking mechanism 730 upward. The seat 718 can be folded by pushing up the sides of the seat or by pushing up the handle 784 of the seat 718, if any. The tie rod link mechanism 786 is connected to the seat 718 at one end and is connected to the frame 702, or a component attached to the frame 702 to maintain the connection of the seat 718 to the device, and at the same time, towards each other for folding. The device can be folded to accommodate the left and right sides of the elevating walkchair 700. The tie rod 786 may be slidably attached to the seat 718 and / or the frame 702.

Slot 774 of the upper crossbar 726 slidably accommodates the extension pin 776 of the bar 778. The guide bar 778 is pivotally fixed to the central upright component 728 by the central upright swivel shaft 780 shown in FIG. The central swivel shaft 780 may be slidably fixed to a central upright component 728 in slot 782. As the extension pin 776 moves along slot 782, the upper crossbar 726, lower crossbar 724 and guide bar 778 swivel and move toward the central upright part 728, moving the back part 708 of the frame 702 towards each other. Let me. The seat 718 is folded upward or downward by about 90 degrees to accommodate parts such as the lower frame part 704 of the elevating walking chair and the armrest 710, and is folded into smaller pieces toward the central upright part 728.

Other conventional folding mechanisms 722 and locking mechanisms 730 may be incorporated into the elevating pedestrian chair 700.

64A-64C show another embodiment of the elevating pedestrian chair 800. FIG. 64A shows an isometric view of the elevating walking chair 800 in the seating mode. FIG. 64B shows an elevating walking chair in an upright mode. FIG. 64C shows an elevating walking chair 800 in an optional folding mode. The elevating pedestrian chair 800 has a single central push-up mechanism 802 with a parallelogram and spring configuration similar to the push-up mechanism 350. The elevating walking chair 800 includes various mechanisms described with respect to the elevating walking chair 700, such as an intermediate height adjusting mechanism, a maximum height adjusting mechanism, a locking mechanism, a pushing force adjusting mechanism other than the bow hole configuration, and a standing arm. A support adjustment mechanism may be provided.

Various embodiments of the present invention have been described, each having a combination of different elements. The present invention is not limited to the specified embodiments or combinations disclosed. The present invention may include different combinations of disclosed elements, omission of some elements or replacement of elements with equivalents of such structure. For example, various aspects of the push-up mechanisms 104, 350 and 602 may be exchanged.

Although exemplary embodiments have been described, additional benefits and modifications will arise for those skilled in the art. For this reason, the invention is not limited to the particular details described herein in its broader form. For this reason, the present invention is not limited to specific exemplary embodiments, but is intended to be construed within the scope and scope of the appended claims and their equivalents. There is.

Claims (25)

An adjustable push-up mechanism for use as a seating device or with a seating device.
At the base,
A parallelogram structure with four pivotally connected links, said parallelogram structure in which one of the four swivel axes is connected to the base. When,
A spring that extends from the first link of the parallelogram to an adjustable end point on the second link of the parallelogram to form a push-up triangle, the end point of the spring being the parallelogram. With a spring that is off the main swivel axis of the shape,
An extension of a relationship fixed to one of the four links of the parallelogram, the parallel when raising or lowering the push-up mechanism between the sitting mode and the standing mode at an angle to the horizontal. In the extension, which is configured to maintain when the angle of the quadrilateral changes, the extension forms a rear seat portion having a trailing edge and a leading edge, and the extension.
A front seat portion having a trailing edge and a front edge, wherein the front seat portion is pivotally attached to the rear seat portion at the rear end of the front seat portion, and the front end of the rear seat portion. The front seat portion is configured to allow the front seat portion to descend downward in the standing mode and return to the seating mode.
A push-up mechanism comprising a push-up power adjusting mechanism configured to adjust the position of the end point of the spring with respect to the main swivel shaft. The push-up mechanism according to claim 1, wherein the adjusting mechanism includes a pin connected to the spring and a series of holes capable of selectively positioning the pin. The series of holes form an arc, and the radius of the arc is the length from the spring swivel axis of one of the four links of the parallelogram to the hole when the spring is fully extended. , The push-up mechanism according to claim 2. The push-up mechanism according to claim 1, wherein the adjusting mechanism includes a pin connected to the spring and a slot capable of selectively positioning the pin. A central seat portion having a complementary shape to the space created between the front seat portion and the rear seat portion in the seating mode, and the central seat portion occupies the space in the seating mode. The first aspect of the invention, further comprising a central seat portion, which is configured to allow the front seat portion to be folded downward by leaving the space at the time of transition to the standing mode. Push-up mechanism. The push-up mechanism according to claim 5, wherein the front central seat portion is positioned on the front base and is held at a predetermined position on the base in the seating mode and the standing mode. The push-up according to claim 5, wherein the central seat portion is attached to one of the four links of the parallelogram and moves, thereby moving to a predetermined position when the seating mode is achieved. mechanism. The push-up mechanism according to claim 1, wherein the spring is compressed by the weight of the seated person and is configured to expand when the user transfers the weight to the user's legs. The push-up mechanism according to claim 1, wherein the maximum height of the rear seat portion is made constant by any push-up power adjustment. The extension is configured to move forward as the parallelogram rises and as the front seat portion descends, thereby moving the center of the user's equilibrium over the user's feet. The push-up mechanism according to claim 1. The push-up mechanism according to claim 1, which has a push-up force between 50% and 95% of the user's body weight. The push-up mechanism according to claim 1, wherein the vertical movement from the seating mode to the standing mode is in the range of 8 inches to 16 inches. The push-up mechanism according to claim 1, further comprising a restraint panel having a first edge attached to the front seat portion and a second edge attached to the central seat portion. The push-up mechanism according to claim 1, wherein the rear seat portion and the front seat portion have an integral cushion. A chair provided with the push-up mechanism according to claim 1. Adjustable push-up mechanism
At the base,
A parallelogram structure with four pivotally connected links, said parallelogram with a parallelogram structure connected to the base at one of the four swivel axes. ,
A spring that pivotally extends from the first link of the parallelogram to an adjustable end point on the second link of the parallelogram to form a push-up triangle, the end point of the spring. , The spring, which is deviated from the main swivel axis of the parallelogram,
An extension of a relationship fixed to one of the four links of the parallelogram, the parallel at which the angle with respect to the horizontal is raised or lowered between the seating mode and the standing mode. With an extension, which is configured to maintain when the angle of the quadrilateral changes,
A push-up mechanism comprising a push-up power adjusting mechanism configured to adjust the position of the end point of the spring with respect to the main swivel shaft. The adjustment mechanism
An arc of a hole that allows the first end of the spring to be selectively aligned and fixed, with the center of the arc at the second end of the spring when the spring is fully extended. The push-up mechanism according to claim 16, further comprising an arc of a hole. A seat comprising the push-up mechanism according to claim 17. An elevating push-up chair with an adjustable push-up mechanism.
The push-up mechanism
At the base,
A parallelogram structure with four pivotally connected links, said parallelogram structure in which one of the four swivel axes is connected to the base. When,
A spring that pivotally extends from the first link of the parallelogram to an adjustable end point on the second link of the parallelogram to form a push-up triangle, the end point of the spring. , The spring, which is deviated from the main swivel axis of the parallelogram,
An extension of a relationship fixed to one of the four links of the parallelogram, the parallel at which the angle with respect to the horizontal is raised or lowered between the seating mode and the standing mode. With an extension, which is configured to maintain when the angle of the quadrilateral changes,
An elevating push-up chair comprising a push-up power adjusting mechanism configured to adjust the position of the end point of the spring with respect to the main swivel shaft. The elevating push-up chair according to claim 19, further comprising a maximum height adjusting mechanism. The maximum height adjustment mechanism is
A height adjustment bar that has a plurality of holes along at least a portion of its length.
The elevating push-up chair according to claim 20, further comprising a pin configured to be inserted into one of the plurality of holes. The elevating push-up chair according to claim 19, further comprising a folding mechanism. The elevating push-up chair according to claim 19, further comprising an intermediate height adjusting mechanism. The intermediate height adjustment mechanism is
A height adjustment bar that has a plurality of holes along at least a portion of its length.
A sleeve that is slidably attached to the height adjustment bar and aligned with the parallelogram structure.
23. The elevating push-up chair according to claim 23, comprising a pin configured to be inserted into one of the plurality of holes through the holes in the sleeve. The elevating push-up chair according to claim 19, further comprising a support arm adjusting mechanism.

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