Multifunctional grandstand chair

A multifunctional grandstand chair includes a chair frame, a cushion movably arranged on the chair frame, and backrest cloth. The chair frame includes a base frame, a backrest tube and two foot supports, which are respectively pivoted to two sides of the base frame and capable of being inwards folded onto the base frame or outwards unfolded to support the base frame. The multifunctional grandstand chair further includes fixed connecting pieces connected between the base frame and the foot supports to limit the maximum unfolding angle of the foot supports. When the multifunctional grandstand chair needs to be transformed into a grandstand chair structure, the foot supports are folded onto the base frame. When the multifunctional grandstand chair needs to be transformed into a common chair, the foot supports are unfolded to be supported on the ground.

BACKGROUND OF THE INVENTION

Technical Field

The invention relates to grandstand chairs, in particular to a multifunctional grandstand chair.

Description of Related Art

Stepped grandstands are mostly constructed in indoor stadiums or outdoor sports fields to particularly serve unspecific users. In order to improve the comfort for people sitting in the grandstands, grandstand chairs can be placed on the grandstands. By the fact that the grandstand chairs are provided with a backrest, armrests and a cushion, the viewers are prevented from directly sitting on the cold steps of the grandstands. Chairs can also be placed on the stepped grandstands to achieve the similar effect for the viewers.

With the single function, grandstand chairs in the prior art can only be applied to grandstands in indoor or outdoor stadiums, thereby being limited in application range.

Moreover, Chinese Utility Model Application No. 201420129855.X discloses a grandstand chair, which includes a cushion with the cloth cover fixed on bottom cross rods. When the grandstand chair is in use, only flexible fabric is used to isolate people from the ground, so that if water accumulates on the ground of grandstands or the temperature of the ground of the grandstands is too low, human bodies will be directly affected, and accordingly, use comfort will be affected.

BRIEF SUMMARY OF THE INVENTION

In view of this, one objective of the invention is to provide a multifunctional grandstand chair, which can be transformed into a structure applicable to grandstands or a conventional chair structure, thereby having multiple functions.

To fulfill the above objective, the invention provides a multifunctional grandstand chair, which includes a chair frame, a cushion movably arranged on the chair frame, and backrest cloth. The chair frame includes a base frame, a backrest tube pivoted to the rear end of the base frame, and two foot supports. The two foot supports are respectively pivoted to two sides of the base frame and capable of being inwards folded onto the base frame or outwards unfolded to support the base frame. The multifunctional grandstand chair further includes fixed connecting pieces connected between the base frame and the foot supports to limit the maximum unfolding angle of the foot supports.

Furthermore, the base frame includes base frame cross rods respectively located at the front end and the rear end and base frame tubes respectively located at the left end and the right end. Each base frame tube is a vertically-arranged annular tube and includes a first tube section located at the upper end, a second tube section located at the lower end, and two connecting tubes connected between the first tube section and the second tube section. The cushion is arranged on the first tube sections of the two base frame tubes.

Furthermore, the multifunctional grandstand chair further includes first foot pads and second foot pads. A gap is reserved between the second tube section and one corresponding connecting tube of each base frame tube. The first foot pads are disposed around the second tube sections via the gaps. Each second foot pad is provided with two connecting grooves and disposed at the corresponding gap. The second tube section and the corresponding connecting tube of each base frame tube are respectively connected to the two connecting grooves of the corresponding second foot pad.

Furthermore, each first foot pad is provided with a hook structure including a hook component and a torsional spring and is formed with an installation hole, wherein the torsional spring is fixed in the installation hole, the hook component includes a hook body, a connecting shaft and a hook, the connecting shaft and the hook are respectively arranged at two ends of the hook body, and the connecting shaft is rotatably arranged in the installation hole. The torsional springs act on the hook bodies, under the acting force of the torsional springs, the hook bodies are attached to the foot supports, and thus, an acting force for inward folding is applied to the hook bodies and the foot supports all the time.

Furthermore, the hook of each hook component is sleeved with a cap.

Furthermore, each foot support is a u-shaped tube and includes two vertical foot tubes and a cross foot tube connected between the two vertical foot tubes. An open end of each foot support is pivoted to the base frame. The cross foot tube of each foot support is supported on the ground.

Furthermore, each cross foot tube is provided with a third foot pad.

Furthermore, each fixed connecting piece includes two connecting rods hinged together, wherein the two connecting rods are respectively hinged to the base frame and the corresponding foot support, and when the two connecting rods are completely unfolded, the unfolding angle between the corresponding foot support and the base frame is limited.

Furthermore, the backrest tube is in an n-shaped tube and includes two vertical backrest tube sections and a cross backrest tube section connected to the upper ends of the two vertical backrest tube sections. An open end of the backrest tube is pivoted to the base frame. The backrest cloth is arranged between the two vertical backrest tube sections.

Furthermore, each vertical backrest tube section is connected to the rear end of the base frame through a rotary connecting piece connected to the base frame and capable of being folded forwards.

The technical scheme provided by the invention has the following beneficial effects:

The two foot supports are additionally arranged on the base frame and can be inwards folded onto the base frame or outwards unfolded to support the base frame; when the multifunctional grandstand chair needs to be transformed into a grandstand chair structure, the foot supports are folded onto the base frame; and when the multifunctional grandstand chair needs to be transformed into a common chair, the foot supports are unfolded to be supported on the ground.

Furthermore, the base frame includes the base frame cross rods respectively located at the front end and the rear end and the base frame tubes respectively located at the left end and the right end, the base frame tubes are vertically-arranged annular tubes, so that a height difference is formed to keep the cushion away from the ground by a certain distance, and thus, the comfort in use is good.

DETAILED DESCRIPTION OF THE INVENTION

In order to further illustrate the embodiments, the drawings are provided by the invention. These drawings are part of the contents disclosed by the invention and mainly used to illustrate the embodiments and to explain the operation principle of the embodiments in combination with relevant description in the specification. By cooperatively referring to these contents, those ordinarily skilled in this field would appreciate other possible embodiments and advantages of the invention. The components in the drawings are drawn not to scale, and similar component signs generally represent similar components.

The invention is further described in combination with the drawings and specific embodiments as follows.

As shown inFIGS. 1-7, a multifunctional grandstand chair in this embodiment includes a chair frame, a cushion50movably arranged on the chair frame, and backrest cloth (not shown). The chair frame includes a base frame, a backrest tube20and two foot supports30.

The base frame includes base frame cross rods12respectively located at the front end and the rear end and base frame tubes11respectively located at the left end and the right end. Each base frame tube11is a vertically-arranged annular tube and includes a first tube section111located at the upper end, a second tube section112located at the lower end, and two connecting tubes113connected between the first tube section111and the second tube section112. The cushion50is arranged on the first tube sections111of the two base frame tubes11, as shown inFIG. 3andFIG. 4.

Furthermore, the multifunctional grandstand chair includes first foot pads13and second foot pads14. A gap17is reserved between the second tube section112of each base frame tube11and one corresponding connecting tube113(the connecting tube113at the rear end). Each first foot pad13is provided with a sleeving hole131and is disposed around the corresponding second tube section112via the corresponding gap17. Furthermore, each first foot pad13is further provided with fixing holes134communicated with the sleeving hole131. The diameter of the sleeving holes131is slightly greater than that of the second tube sections112so that the first foot pads13can easily move on the second tube sections112. When the sleeving holes131are moved to corresponding positions (the front end of the base frame tubes11in this embodiment), fixing parts (such as screw fasteners) fixedly penetrate through the fixing holes134and abut against the second tube sections112to achieve fixation. Each second foot pad14is provided two connecting grooves, which are a first connecting groove141and a second connecting groove142respectively. The second foot pads14are disposed at the gaps17. The second tube section112and the corresponding connecting tube113of each base frame tube11are respectively connected to the first connecting groove141and the second connecting groove142of the corresponding second foot pad14. The first foot pads13and the second foot pads14are additionally arranged to improve the stability of the chair when the base frame tubes11make contact with the ground of grandstands.

Particularly, first connecting holes143and second connecting holes144are respectively formed in walls of the first connecting groove141and the second connecting groove142of each second foot pad14. Third connecting holes1121and fourth connecting holes1131are respectively formed in the second tube section112and the corresponding connecting tube113. The second tube sections112are inserted into the first connecting grooves141, then the third connecting holes1121correspond to the first connecting holes143, and fixing parts (such as bolts) penetrate through the third connecting holes1121and the corresponding first connecting holes143to achieve connection. The connecting tubes113are inserted into the second connecting grooves142, then the fourth connecting holes1131correspond to the second connecting holes144, and fixing parts (such as bolts) penetrate through the fourth connecting holes1131and the corresponding second connecting holes144to achieve connection.

The backrest tube20is in an n-shaped tube and includes two vertical backrest tube sections21and a cross backrest tube section22connected to the upper ends of the two vertical backrest tube sections21. An open end of the backrest tube20is pivoted to the base frame. The backrest cloth is arranged between the two vertical backrest tube sections21. Furthermore, each vertical backrest tube section21is pivoted to the rear end of the base frame through a rotary connecting piece23, which is connected to the base frame and capable of being folded forwards. Particularly, the rotary connecting pieces23are pivoted to the rear end of the base frame, and in this embodiment, the rotary connecting pieces23are pivoted to the rear ends of the first tube sections111. The vertical backrest tube sections21of the backrest tube20are fixed on the rotary connecting pieces23.

The two foot supports30are respectively pivoted to two sides of the base frame and can be inwards folded onto the base frame or outwards unfolded to support the base frame. Particularly, in this embodiment, each foot support30is a u-shaped tube and includes two vertical foot tubes31and a cross foot tube32connected between the two vertical foot tubes31. An open end of each foot support30is pivoted to the base frame. The cross foot tubes32of the foot supports30are supported on the ground. The foot supports30are u-shaped tubes, so that the structure is simplified while the stability of the supporting structure is ensured, and the weight and cost are reduced. In other embodiments, the foot supports30can also be flat plate structures or the like.

Furthermore, in this embodiment, the cross foot tubes32are provided with third foot pads321, thus, having better supporting stability.

The multifunctional grandstand chair further includes fixed connecting pieces connected between the base frame and the foot supports30to limit the maximum unfolding angle of the foot supports. Particularly, in this embodiment, each fixed connecting piece includes two connecting rods41which are hinged together, wherein the two connecting rods41are respectively hinged to the base frame and the corresponding foot support30, and when the two connecting rods41are completely unfolded, the unfolding angle between the corresponding foot support30and the base frame is limited to prevent the foot support30from continuing to be unfolded, and thus, the whole structure is fixed. In other embodiments, the fixed connecting pieces can also be connecting ropes with certain lengths or other structures.

When the multifunctional grandstand chair in this embodiment needs to be transformed into a grandstand chair structure, the two connecting rods41of each fixed connecting piece are bent first, and then the foot supports30are folded onto the base frame, as shown inFIG. 2. When the multifunctional grandstand chair needs to be transformed into a common chair, the foot supports30are unfolded to be supported on the ground, as shown inFIG. 1. When the multifunctional grandstand chair needs to be stored, the backrest tube20is folded to be stored on the base frame on the basis ofFIG. 1. The multifunctional grandstand chair can serve as a grandstand chair as well as a common outdoor chair, thereby having multiple functions; and meanwhile, the multifunctional grandstand chair has a simple structure and a low weight and cost by the fact that connection is achieved completely through tubes.

Furthermore, in this embodiment, each base frame tube is a vertically-arranged annular tube and includes a first tube section111located at the upper end, a second tube section112located at the lower end, and two connecting tubes113connected between the first tube section111and the second tube section112. The cushion50is arranged on the first tube sections111of the two base frame tubes, as shown inFIG. 3andFIG. 4. In this way, a height difference is formed to keep the cushion50away from the ground by a certain distance, and thus, the comfort in use is good. In other embodiments, single tube structures can also be adopted to achieve the same effect.

Furthermore, in this embodiment, each first foot pad13is further provided with a hook structure including a hook component16and a torsional spring15and is formed with an installation hole132, wherein a through gap133is reserved between the installation hole132and the corresponding sleeving hole131, the torsional spring15is fixed in the installation hole132, and the torsional spring132is provided with a torsional arm fixed in the through gap133. Each hook component includes a hook body161, a connecting shaft162and a hook163, wherein the connecting shaft162and the hook163are respectively arranged at two ends of the hook body161, the connecting shaft162is rotatably arranged in the corresponding installation hole132, particularly, an external thread1621is tapped at the tail end of the connecting shaft162, a nut1622is assembled at the other end of the installation hole132, the connecting shaft162is rotatably penetrates through the installation hole132, and the external thread1621at the tail end of the connecting shaft162is connected with the nut1622in a threaded mode. Each torsional spring15is provided with another torsional arm acting on the corresponding hook body161. Under the acting force of the torsional springs15, the hook bodies161are attached to the foot supports30, and thus, an acting force for inward folding is applied to the hook bodies161and the foot supports30all the time. Based on this configuration, when the multifunctional grandstand chair is folded into a grandstand chair, the foot supports are not prone to being unfolded automatically, and thus, structural stability is improved. Meanwhile, when the multifunctional grandstand chair serves as a grandstand chair, the hooks163are hooked on a grandstand, and thus, the chair is unlikely to move when people lie backwards on the chair. Under the torsional force of the torsional springs15, the hook components16automatically restore when not used. Furthermore, the front end of each hook163is provided with a cap18, which is chamfered to prevent scratches to people.

Although the invention is specifically demonstrated and introduced with preferred embodiments, those skilled in this field would appreciate that various transformations of the invention can be made in forms and details without deviating from the spirit and scope defined by the Claims of the invention, and all these transformations should fall within the protection scope of the invention.