RU2769653C1 - Folding chair with swivel seat - Google Patents

Abstract

FIELD: furniture.

SUBSTANCE: invention relates to design of folding chair with rotary seat. Chair consists of a base in the form of a frame, to which a curved stand is attached by both ends to form a hinge. Middle part of the curved post is attached to the central rod with formation of a hinge. Movable post is attached to the opposite side of the base with formation of a hinge and the possibility of changing the attachment point by one end, which by the other end is attached to the central rod by means of a detachable connection. Double-arm lever is attached to the end face of the rotating part of the central rod to form a hinge and with the possibility of both ends coming into contact with supports installed or made on the seat so that it is fixed in the working state of the chair. Chair is equipped with an eccentric cam, by means of which adjacent parts of the chair are pressed to each other in a folded state. Eccentric cam is pivotally mounted on the central rod with the possibility of pressing the seat from the central rod in the folded state of the chair.

EFFECT: improvement of operational and technological properties of chair by pressing elements of chair to each other in folded state.

9 cl, 7 dwg

Description

The invention relates to the design of a chair that can be transformed into a folded state, convenient for carrying and storing.

A revolving chair is known, patent TW281627(B)-1996-07-21, which is transformed into a compact state for carrying or storage, having a base to which a plate is attached through a hinged assembly, on which the transforming mechanism of the chair is mounted. In such an arrangement, the hinge assembly is located close to the surface on which it is mounted and is therefore susceptible to contamination. The details of the chair are stacked away from the base, as a result of which, when folded, the chair in one of the directions has large dimensions.

A rotating chair is known, patent 2651516 RU, containing a base in the form of a frame, to which a central rod is attached by means of two racks at the lower end, a rotating part of the central rod mounted on the central rod with the possibility of rotation, a tubular rod mounted on a rotating part, to which using brackets, the seat is attached with the possibility of rotation relative to the axis of the tubular rod, a lever is attached to the end of the rotating part of the central rod with the formation of a hinge and the possibility of both ends to come into contact with the stops installed or made on the seat, ensuring its fixation in working condition and which is equipped with a -shaped bracket installed in the cavity of the tubular rod with the possibility of contact with two opposite sides of the base to fix the chair in the folded state. In such a design, the exact dimensions of the parts of the chair are required to eliminate play and, therefore, shocks between the contacting parts of the chair in the folded state during transportation.

The purpose of this invention is to create a chair design with improved operational and technological properties.

This goal is achieved by the fact that in the proposed design the main parts are attached to each other by means of brackets made of plastic, and a compensation element is installed on the central rod, through which the parts of the chair are pressed against each other in the folded state.

The quadrangular base in the form of a frame is made by bending an aluminum tube to form three corners and fastening its ends in the fourth with a plastic bracket in the form of a corner with holes. This design makes it possible to make the base from hard aluminum alloys, for example, from AD 31 T. The connecting plastic bracket can be prefabricated or formed directly on the base from liquid or thermoplastic plastic. The connecting bracket can be made of polyurethane or polyurethane compound. A limiter for the movement of the moving rack and an additional support in the form of bushings made of plastic or bushings with a through groove are installed on the base, made with the ability to install them by snapping.

The curved pole is hinged to the base by means of plastic curved pole brackets, which can be made of polyurethane or polyurethane compound. On the brackets of the curved post, stops are made, with which the brackets of the curved rack abut against the seat in the folded state of the chair.

The central rod is attached to the curved post with the formation of a hinge by means of a bracket made of plastic, which also fastens the parts of the central rod. The center rod consists of the center rod bracket, the main tube of the center rod, the installation tube. The main tube of the center rod and the mounting tube are made of aluminum alloy.

The central rod is made by pouring thermoplastic or liquid hardening plastic into a mold, where the main tube of the central rod and the mounting tube are embedded parts, thus forming a single non-detachable part, or the main tube and the mounting tube are installed in the holes made in the bracket of the central rod. The center rod bracket can be made of polyamide or glass-filled polyamide. The installation tube is attached at one end to the bracket of the central rod, and at the other end, with a detachable connection, to the moving stand in the working condition of the chair. To increase the rigidity and reliability of this assembly, reinforcement from three steel tubes welded together can be installed inside the bracket of the central rod, or the ends of the tube of the central rod and the installation tube are welded to the connecting tube installed coaxially with the hinge so that the hinged part of the curved rack is located in the internal cavity connecting tube. A protrusion is made on the bracket of the central rod to form a surface on which the base rests in the folded state of the chair, ensuring that the curved post is fixed from rotation relative to the base in the position of the axis of the central rod longitudinal to the plane of the base or close to such a position and with the possibility of turning the curved post relative to the base when changing position of the central bar. The protrusion on the bracket of the central rod, together with the installation tube, forms a prism into which the base is installed on one side in the folded state of the chair.

The main tube of the central rod is attached at one end to the bracket of the central rod, and at the other end by means of a hinged sleeve to the rotating part of the central rod. The hinge sleeve can be made of plastic, in particular polyamide.

An eccentric cam is installed on the central rod with a lever that can contact the seat in the folded state of the chair. The eccentric cam is pivotally mounted on the main tube of the central rod in its middle part with the ability to rotate relative to the axis of the main tube of the central rod and can be made of plastic. On the main tube of the central rod, two casings are installed in the form of a tube made of porous material, between which an eccentric cam is located. Casings can be made of foamed polyethylene, it can be a heater for pipes. An eccentric cam is mounted on the central rod to ensure that the adjacent parts of the chair are pressed against each other in the folded state.

The aluminum tube trolley is attached to the base by means of a trolley pole bracket, which can be made of plastic. A tightening clamp with a lamb and a casing in the form of a porous tube, which can be made of foamed polyethylene, are installed on the moving rack.

At the end, by which the moving rack is attached to the central rod, a through longitudinal groove is made with the provision of a reduction in the diameter of the connecting hole of the moving rack by means of a tightening collar with a lamb. In the desired position, the tightening collar is held by the casing by means of an opening made in the casing, through which the lamb of the tightening collar is passed. At the end where the movable column is attached to the central rod, a locking ring and a plastic washer can be installed to ensure that the casing is fixed on the movable column.

The arm of the rotating part is made of plastic. Inside its coaxially tubular rod there is a connecting tube made of steel, to which the central rod axis and the lever axis are welded transversely to the tubular rod and coaxially to each other on both sides of the tubular rod.

The tubular rod with its middle part is located inside the bracket of the rotating part and in the inner cavity of the connecting tube.

The bracket of the rotating part is molded with thermoplastic or liquid hardening plastic, and the tubular rod, the lever axis and the axis of the central rod are embedded parts, thus forming the rotating part of the central rod. The axis of the central rod and the axis of the lever can be held by the bracket of the rotating part without the connecting tube. These can be bolts installed inside the bracket with their heads. A two-arm lever is pivotally mounted on the lever axis with a hole in the middle part, with the possibility of contacting the chair in the working condition with the stops mounted on the seat, and is fixed with a nut. The two-arm lever can be made of a profiled aluminum tube.

The seat is attached to the tubular rod with the formation of a hinge by means of two seat mounting brackets, which have a profile groove at the place of contact with the seat with the possibility of installing an L-shaped bracket into it, which is fixed in the working condition of the chair by pressing the seat mounting bracket to the seat plate by means of wing nuts and combination head screws. Wing nuts can be located on the working surface of the seat.

The seat consists of a seat plate, two elastic bands attached to the seat, lever stops. The lever stop is a longitudinal plate with a bent end. On the seat, by means of two elastic bands installed crosswise, a seat pad is attached, which can be made of a porous material, such as polyethylene foam. In the central part of the seat pad there is a hole for installing the support bracket in the folded state of the chair. The support bracket can be installed between the elastic bands and the seat pad or between the seat pad and the seat plane.

The seat plate is a disk cut out of plywood, has a working surface and a mounting surface on which the lever stops and seat mounting brackets are attached.

In the peripheral part of the seat plate, four profile holes are made for installing elastic bands in them. Two profiled holes are made in the seat plate, into which the bent part of the lever stops is installed. In the central part of the seat plate, a profile hole is made to accommodate the nuts for fastening the two-arm lever in the working state of the chair to ensure that the seat rotates relative to the tubular rod in the position of the two-arm lever coaxially with the tubular rod or close to such a position.

The chair is equipped with an L-shaped bracket, which, in the working state of the chair, is installed at one end into a groove made in the seat mounting bracket between the seat mounting bracket and the seat plate, and a support bracket is installed on the other end of the L-shaped bracket. The L-shaped bracket installed in this way can fix the two-arm lever.

The L-shaped bracket is made by bending a shaped aluminum tube with a rounding at the bend to ensure that the moving stand is fixed in the folded state of the chair.

In FIG. 1 General view of the chair in working order.

In FIG. 2 view A in Fig. one.

In FIG. 3 section B - B in Fig 2.

In FIG. 4 the location of the parts of the chair relative to each other in the folded state.

In FIG. 5, section B-B in FIG. 4.

In FIG. 6 view D not Fig 1.

In FIG. 7 General view of the chair in the folded state.

As shown in FIG. 1, fig. 4, fig. 5, an eccentric cam 2 is pivotally mounted on the central rod 1. The lever made on the eccentric cam 2 facilitates its rotation relative to the axis of the central rod 1. The eccentric cam 2 is installed with the ability to contact the working surface with the seat plate 3 in the folded state of the chair with the provision by means of its rotation relative to the axis of the central rod of pressing one edge of the seat plate 3 from the central rod 1 and pressing the other edge of the seat plate 3 to the brackets 4 of the curved rack 31 or to the stops made on them, as shown in Fig. 4. The location of the eccentric cam 2 on the central rod 1 determines the casing 5 and the casing 6 between which it is installed. Plastic washers 7 form the ends of elastic porous casings 5 and 6 and provide better sliding of the eccentric cam 2. The moving rack 8 is attached to the base 9 by a bracket 10 with the ability to move along the base 9 from the stop 11 to the bracket 12 that fastens the ends of the base. The casing 13 holds the tightening collar 14 in the desired position, and the washer 15 and the retaining ring 16 fix the casing 13 as shown in Fig. one.

In FIG. 1, Fig. 2 L-shaped bracket 17 is installed in the groove made on the seat mounting bracket 18 and is fixed by pressing the seat mounting bracket 18 to the seat plate 3 with furniture screws 19 and wing nuts 20. In Fig. 3, the stop of the lever 22 is installed by a bend in the profile hole made in the seat plate 3 with the possibility of contact with the two-arm lever 21 in the working condition of the chair. In FIG. 1, fig. 6 shows a profile hole in the seat plate 3, in which the nut 23 is placed in the working condition of the chair. On the peripheral part of the seat plate 3, four profile holes are made with the possibility of installing elastic bands 24 in them to ensure the fixation of the seat pad 25 of FIG. 4, FIG. 6 and the possibility of fixing the ends of the elastic bands 24 on the working surface of the seat plate 3 with brackets.

In FIG. 1, fig. 4 in the central part of the seat pad 25, a hole is made with the possibility of installing a support bracket 26 into it, which is fixed with elastic bands 24. In FIG. 7 L-shaped bracket is made with a rounding at the bend, presses the moving column 8 to the curved column 31 in the folded state of the chair. In this case, the lamb of the tightening collar 17 is located between the seat plate 3 and the curved post 31 of FIG. 7. By means of an eccentric cam 2, the main parts of the chair are pressed against each other, thereby fixing the L-shaped bracket 17 in the folded state of the chair.

In FIG. 4, a stop is made on the central rod 1, which, in the position of the curved post 31 and the central rod 1, fixes the curved post 31 longitudinally in the plane of the base 9.

In FIG. 1, the rotating part 27 is connected to the central rod 1 by means of a hinge sleeve 28 to form a hinge. Washers 29 and 30 act as a thrust bearing.

Claims (9)

1. A folding chair with a swivel seat, consisting of a base in the form of a frame, to which a curved stand is attached at both ends with the formation of a hinge, the middle part of the curved stand is attached to the central rod with the formation of a hinge, to the opposite side of the base with the formation of a hinge and the ability to change the attachment point At one end, a moving post is attached, which at the other end is attached to the central rod by means of a detachable connection; state of the chair, the chair is equipped with an eccentric cam, by means of which the adjacent parts of the chair are pressed against each other in the folded state, characterized in that the eccentric cam is pivotally mounted on the central rod with the ability to press the seat about t central rod when the chair is folded. 2. The chair according to claim 1, characterized in that the eccentric cam with a lever is mounted on a central rod between porous plastic casings. 3. Chair according to any one of paragraphs. 1, 2, characterized in that a casing made of porous plastic is installed on the moving rack to secure the tightening clamp. 4. Chair according to any one of paragraphs. 1-3, characterized in that on one or two brackets, through which the seat is attached, a profile groove is made with the possibility of installation and fixation between the seat and the said bracket of the L-shaped bracket. 5. Chair according to any one of paragraphs. 1-4, characterized in that a protrusion is made on the central rod to form a surface with which the base contacts in the folded state of the chair to secure the curved post. 6. Chair according to any one of paragraphs. 1-5, characterized in that a profile hole is made in the central part of the seat to ensure seat rotation. 7. Chair according to any one of paragraphs. 1-6, characterized in that four profile holes are made on the peripheral part of the seat with the possibility of installing elastic bands in them to ensure the fixation of the seat gasket. 8. Chair according to claim. 4, characterized in that the L-shaped bracket is made with a rounding at the bend to ensure the fixation of the moving rack in the folded state of the chair. 9. A chair according to claim 7, characterized in that a hole is made in the central part of the seat gasket with the possibility of installing a support bracket into it.

Images