KR930004458B1 - Recline chair - Google Patents

Abstract

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Description

Recliner

1 is a partially cutaway side view of a chair according to the invention in which the seat and the backrest are in an upright position and the headrest is in an extended position.

2 is a side view of the present invention showing a state in which the seat and the backrest are laid down and the headrest is contracted in a solid line position and extended in a double-dashed line position.

3 is a fragmentary enlarged cross-sectional view taken along line 3-3 of FIG.

4 is a fragmentary cross-sectional view of the headrest support taken along line 4-4 of FIG.

FIG. 5 is an enlarged front view showing the interlock mechanism in each arm which respectively controls the headrest and backrest actuators. FIG.

6 is a horizontal view taken along line 6-6 of FIG. 5. FIG.

FIG. 7 is a flat horizontal view taken along line 7-7 of FIG. 1 showing the adjustment mechanism for the head support which can move vertically within the headrest.

* Explanation of symbols for main parts of the drawings

10,11: side frame 17: pivot

18: arm 20: backrest

25: Sheet 28,29: Suspension Link

33: frame 39,69: spring assembly

44: headrest 49,50: upper and lower headrest sliders

72: lock mechanism 86: bed

92: tubular wall 98: rocker arm

114: slider 118,120: bead or stiffener

122: adjustment lever 131: head support

133: shaft

FIELD OF THE INVENTION The present invention relates generally to armchairs, and in particular to chairs capable of performing certain office tasks with much more comfort than conventional chairs and desks or chair and table positions.

People tend to perform certain office tasks more easily while in a comfortable position. As such, typical chair-desk or chair-table positions typically did not require an ideal position, even when performing office tasks such as reading, writing or using a computer or word processor. Therefore, it is desirable to provide a work chair in the form of an armchair that can be easily performed even with the aid of a specified table or work surfaces, even for office work such as reading and writing.

As an example of the type of furniture that can be used with the armchair of the present invention to facilitate such office work, there is a pending application of the present applicant filed with the same name as "Lamp". Likewise reference may be made to the pending application of the applicant whose name is "Table" filed on the same day as the present application. Although the present invention is designed primarily for office use, it will be appreciated that the armchair of the present invention can be used, for example, in a home or hotel room.

An armchair that can be used as an ottoman is provided including a retractable seat and a backrest. The chair has a frame that provides a laterally separated pivot for the backrest and the arm in an approximately ideal position with respect to the user's legs and back. The backrest is provided above the armrest extending rearward from such pivot. The seat is pivotally connected at the front of the frame and suspended from the link connected to the arm via a control mechanism to move about a radius shorter than the backrest. In this way, the back rests substantially lying down while the seat is only slightly tilted.

The headrest is installed on top of the backrest and can be stretched through an arc taken from the ideal pivot point for the user's head and back. The headrest includes a vertically adjustable head support that ideally fits the nape under the head. The head support can be manually adjusted with the handle from both sides of the headrest via the rack and pinion angle mechanism.

The headrest and the retractable seat back and arms are provided with an actuator comprising a lock mechanism actuated by controllers on the inside and at the front end of each flax of the chair. The user's weight on the seat of the chair can be released only through the appropriate control mechanism on the chair arm, automatically causing the headrest lock mechanism to interlock. In addition, the weight of the user on the seat of the chair actuates the control mechanism for the back down actuator, so that the opposing arms may be released via each controller at the inner front edge. The seat and back actuator may be in the form of a gas spring and a plunger, while the headrest actuator may be simplified in the form of a coil spring and a plunger. When a person leaves the seat, the backrest, seat, arm and headrest will automatically move to an upright or extended position, unless performed through a controller. This function is achieved by the seat weight response linkage in each arm of the chair.

To the accomplishment of the foregoing and related ends, the invention comprises the following description, which sets forth certain embodiments of the invention in detail, and the features recited in the accompanying drawings and the claims, as described below, although It will be appreciated that there are only a few of the various examples that may be employed.

Referring first to FIGS. 1 and 2, the chair of the present invention comprises two side frames 10, 11 spaced laterally in the same shape. Each of the side frames has a front leg 12 and a rear leg 13 interconnected in the horizontal direction from the top by the frame member 14. The horizontally extending upper frame member has a protrusion 16 projecting upwardly in the center, which projects the pivot 17 against the arm 18 and the backrest 20 on the side of the chair. to provide. The front and rear legs of the side frame are not only interconnected by the tubular elements 22, 23, but also by the tubular pivot 24 forming a pivot for the seat 25 on top of the front leg 12. It is connected.

The seat 25 comprises a frame 26 whose front end is pivotally connected to the transverse tubular pivot 24 and its rear end is pivotally connected to the lower ends 30 and 31 of the suspension links 28 and 29. do.

The backrest 20 has a frame 33 that is rigidly connected to each arm via vertically spaced joints 34 and 35, so that the back and the arms protrude forward of the backrest of each arm. And at the same time to form a rigid obtuse frame to protrude laterally with respect to each side of the frame at the pivot (17). As shown, the pivot 17 is slightly above the seat in front of the backrest and is preferably located at an ideal turning point for the user's legs and back. Two slightly laterally spaced arc-shaped arms 37 extend tightly downward from the lower end of the backrest frame and are pivotally connected to one end 38 of the gas spring piston-cylinder assembly 39. The piston or plunger rod 40 of this gas spring is pivotally connected to the center of the transverse tubular element 22 via a bypass valve assembly 41 for the assembly. The bypass valve assembly can be actuated through a release mechanism 42 installed thereon. This device is operated by a tension cable, described below, via a suitable linear-rotational motion mechanism. When the valve is open, the gas spring extends to bring the chair to the upright position shown in FIG. 1 as opposed to the lying position shown in FIG.

The headrest 44 is provided on the backrest 20 and can be stretched through the arc shown. In FIG. 1 the headrest is extended, while in FIG. 2 it is shown contracting in the solid line position and extending in the dashed-dotted position indicated by reference numeral 45. The headrest comprises a U-shaped frame 46 consisting of a back plate 47 and a somewhat wider spaced side plate 48 with a quarter circle at the upper, upper and lower edges (see FIG. 7). The upper headrest slider 49 is fixed to the lower center of the back plate and extends circularly as shown in FIG. The upper headrest slider 49 is fitted into the lower headrest slider 50 fixed to the backrest as shown in detail in FIG. Both of these sliders are taken from the same center as the pivot point 52, which is arcuate in shape and is an ideal pivot point for the user's back and head.

As is more clearly shown in FIG. 4, the upper headrest slider 49 is provided with semicircular laces 52, 53 at its side edges. The lower headrest slider has a U-shape to surround the upper slider and has arcuate legs 55 and 56 interconnected as shown by reference numeral 57. Each leg is provided with a series of tapped holes 59 for receiving the threaded stud assembly 60 with the ball protrusion 61 covered with plastic. These ball protrusions fit inside the races 52 and 53 of the upper slide member. The lower slide member has a flange 64 which is offset inwardly and fixed to the frame 33.

The lower end of the upper slide member is bifurcated to provide slack in the ring 67 of the rod 68 of the spring plunger assembly 69. The ring 67 can be secured to the upper head slider 49 via a suitable pin connector 70.

The rod 68 of the spring assembly 69 extends through an appropriate spring loaded lock plate mechanism 72 as shown in FIG. 1, which lock plate mechanism moves along its angle with respect to the rod axis. It is similar to a simple door lock mechanism that can lock a rod against.

With particular reference to FIG. 3, it can be seen that the spring assembly 69 is mounted on an offset pivot 75 inside the cylindrical housing 76. Further, as can be seen in FIG. 3, an offset pivot 75 is provided on the arms 77, 78 welded to the backrest channel 79, which forms part of the frame 33. As shown in FIG. The base plate 81 is fixed to an offset pivot that supports the spring housing 76, and the flapper valve 82 allows air to enter the spring housing when the plunger spring rod 68 is extended. It may be provided in the center of the housing via.

Referring to FIGS. 5 and 6, each arm 18 of the chair is symmetrical to the other, and the arm at the far or opposite side is seen in FIGS. 5 and 6 from the positions of FIGS. 1 and 2. Is shown. Each arm has a plate 85 that extends somewhat centrally vertically, and at the top of the plate is provided a stool bed 86 having a downwardly curved front portion 87 and an upside down outer flange 88. have. The bed provides a support for the armrest cushion 89 shown more clearly in FIGS. 1 and 2. The plate 85 also has a pin that protrudes outward to provide the pivot 17 on the side frames 10, 11.

The tubular wall 92 generally protrudes inward from each plate 85 and is slightly smaller than the contour of the bed 86. The wall 92 is appropriately grooved or recessed in certain areas, and a cover plate, not shown, is provided on the side facing the viewer in FIG. 5. The wall 92 and the cover plate associated with the wall provide a housing for the interlock and control mechanism shown, and each arm is provided with one such interlock and control mechanism. The control mechanism in the illustrated arm can adjust the spring loaded lock mechanism 72 to the headrest 44 via the tension cable 94, while the mechanism in the arm closest to the viewer is the release mechanism 42. It is possible to adjust the bypass valve 41 or the gas piston-cylinder assembly 39 through the tension cable 95 shown in dashed lines. The interlocking and control mechanisms inevitably operate in the same way, with or without the operation of individual actuators, although somewhat different in function.

Each support link 28, 29 is not pivotally connected directly to the arm 8, but rather is a reference to one end of the rocker arm 98 pivotally connected to the plate 85 at 99. It can be seen from 97 that it is pivotally connected. The opposite end 101 of the rotor arm is fixed to the tensioning spring 102, the opposite end of which is fixed to the plate 85 at 103. The spring tends to move the rocker arm clockwise to the solid position shown in FIG. 5 and will also be so when the seat is free of user weight. The clockwise movement of the rocker arm is defined by engagement at reference numeral 105 between the upper offset portion 106 of the rocker arm and the top wall of the housing. When the user's weight is applied on the seat, the rocker arm moves to the position of the dashed line indicated by reference numeral 108 defined by the engagement of the stop 11 fixed to the wall with the circular groove 109 formed on the lower side of the arm. will be.

The rocker arm 98 has a relatively short downwardly protruding third arm 112 which is pivotally connected at 113 to the inverted U-shaped slider 114. The slider 114 is installed on the upper tension cable guide block 115 for horizontal sliding motion, which extends over the end of the slider through the groove in the end pusher 116. Thus, rocking of the arm 98 will move the slider pusher back and forth from the gaze position to the dotted line position 117 corresponding to the dashed line position 108 of the rocker arm. The tension cable has a bead or stiffener 118 secured thereto and pushes the plate 116 against it. The cable extends beyond the reinforcement 118, and additional beads or reinforcement 120 are provided after the cable passes through the push board 121 on the control lever 122. The adjustment lever is pivotally connected to the pin 123, and is urged counterclockwise by the coil spring 124 as shown in FIG. The adjusting knob 126 protruding inward may be installed on the distal end of the adjusting lever 122. The lever is provided for moving between the stops 127, 128 formed by the housing wall.

The spacing between the beads or reinforcements 118 and 120 is such that the adjustment lever 122 will not operate when the chair is empty.

When the cable is pulled against the spring force by moving the plate 116 to the solid line position, the bead or the reinforcement 120 moves past the effective range of the plate 121. Only when the plate 116 is in the dashed position will the bead or stiffener 120 strike the plate 121, so that the clockwise movement of the lever 122 will pull each cable.

Of course, this is a link 28 against tension in the spring 102 that moves the rocker arm 98 counterclockwise to the point of dashed line where the person sitting in the chair contracts the plate 116 to the dashed position 117. 29) is achieved by pulling down.

Due to the headrest spring mechanism, when the chair is empty, the lock mechanism 72 is released, so that the headrest 44 may extend and be manually moved against the pressure of the spring mechanism. Then, if the person is not in the chair, the lock mechanism can be released only by the operation of the engaged lever with which it is engaged. In this way, the user can manually adjust the position of the headrest or adjust the position of the headrest simply by moving the head back only when the associated lever is actuated.

If the chair is empty, the gas spring assembly 39 will extend to its upright position. When a person is sitting on a chair, the associated adjustment lever is energized, and then the user can easily lay it down simply by tilting the chair backward through the use of the associated lever. The chair can be locked in the desired lying down position simply by releasing the lever. If the user wants to get out of the chair, the lever will actuate again and the gas spring will assist the user in coming upright position. If for some reason the user rises from the chair with the back still lying, the weight removed from the seat will push the bead or reinforcement 118 forward and the chair will automatically move to its standing position.

In the chair shown, as the back and arms lay down at an inclination angle of approximately 25 ° with respect to the pivot 17, the seat lies about 4 ° to 5 ° with respect to the pivot 24, Such inclination with respect to is controlled by a relatively short radius between pivot pivot 97 and pivot 17 at the upper ends of each seat suspension link 28 and 29. The headrest can move through an arc of approximately 32 ° about the pivot point 52.

Referring back to FIGS. 1 and 2 in addition to FIG. 7, the headrest is foamed and slightly rigid with an outer cushion or pad 130 extending in a curved form around the top and bottom of the headrest as shown. Semi-circular head support 131, the head support 131 can move vertically in the headrest. This inner support 131 is the head-neck support of the headrest and is designed to fit the nape under the head. The head support 131 can be moved vertically manually using the handle 132 on the ends of the shaft or rod 133 protruding through the slot 134 on each side of the headrest. As shown more clearly in FIG. 7, the handle extends through the entire headrest by receiving plastic fittings 137, 138 in the slots provided in the side plate 48 protruding forward of the back plate 47. It is installed on the outer ends of the.

As shown in more detail in FIG. 7, the head support 131 is formed by two semi-circular side plates interconnected by horizontally spaced transverse plates or frame members 141, 142 to accommodate the transverse shaft 133. 140 is installed between them. The spur gear 144 is fixed to the shaft 133 at each end and meshes with the rack gear 145 fixed to the back plate 47 of the headrest U-shaped frame. As the rack and pinion mechanism simply acts as a squaring mechanism at each end of the transverse shaft 133, the shaft can be moved vertically from both ends without being constrained. The vertical movement of the support 131 allows the flexible foam pad 130 to follow the vertical position of such a head support. A plate 147 is fixed to the protruding end of the upper headrest slider 49, which is fixed to the back plate 47 of the headrest frame 46 by a fastener 148. The outer surfaces 150 and 151 of the headrest are provided with fibers or vinyl covering the foam padding. In any case, the head support 131 can be easily manually adjusted vertically within the headrest to provide the most comfortable position for the user.

The seat and back may also be provided with lids 153 and 154 to receive the seat and back cushions 155 and 156, respectively.

Also, as can be seen in FIG. 2, the chair of the present invention has a frame 159 shaped similar to the chair frame and is provided to the ottoman 158 provided with padding 160 to support the user's legs in the elevated position. It is designed to be used. In addition, the fixed and movable headrest slider at the top of the backrest and the arc-shaped arm 37 and gas spring assembly 39 at the bottom of the chair have a shape as shown by the dashed line 163 in FIG. It can be surrounded by a suitable bellows.

The armchairs of the present invention are designed for use with related devices such as those shown in the applicant's pending application described above, which can be easily performed even in office work such as reading and writing or using a computer. Although these chairs are designed for use in an office-like environment, they can be easily used at home or elsewhere.

Claims (10)

Side frames 10 and 11, seats 25 pivotally connected to the side frames at their front ends, and pivots 17 on the seats which are ideal pivot points for the user's legs and the like. An armchair, characterized in that consisting of a backrest 20 is pivotally connected, and a headrest 44 installed on the backrest to perform an arc-shaped stretching movement. 2. The backrest (20) of claim 1, wherein the backrest (20) comprises arms (18) projecting forwardly fixed relative to the backrest, the arms having their front ends pivoted at an ideal pivot point for the user's legs and the back. Armchair characterized in that. 2. An armchair according to claim 1, further comprising a gas spring assembly (39) for pushing the headrest to an extended position and a spring plunger assembly (69) for pushing the backrest to an upright position. . 4. An armchair according to claim 3, comprising an arm for a chair (18), wherein the adjustment means of each arm controls the spring assemblies. 5. The armchair as claimed in claim 4, wherein each adjusting means (126) further comprises a rocker arm (98) in each arm that is operative to react according to the weight of the user in the chair. 2. The armchair of claim 1 further comprising means for extending and retracting the headrest through an arc taken from the center at an ideal turning point for the user's head and back. 7. The armchair of claim 6 further comprising a spring plunger assembly (69) actuated to extend said headrest. 8. The armchair of claim 7, further comprising a rocker arm (98) that reacts according to the weight of a person in the chair such that the spring assembly is not actuated. 9. The armchair of claim 8 further comprising adjustment means operable to react according to the weight of the person in the spring assembly. 2. The armchair of claim 1 wherein the lay down ratio of the backrest and the seat is approximately 5: 1.

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