Patent Application
20200329872
The disclosure relates to a chair, and more particularly to a foldable chair.
A conventional folding chair includes a seat, two front legs, two rear legs, and a chair back. When the folding chair is folded, the components the folding chair are essentially aligned to be proximate to and parallel to each other, such that the folding chair takes less space and becomes portable for many occasions. Despite its convenient traits, the folding chair may still pose safety concern for small children, as they may get clamped by the folding movement of the folding chair while handling the folding chair as apart of the play.
Therefore, an object of the disclosure is to provide a folding chair that can alleviate the drawback of the prior art.
According to the disclosure, the folding chair includes a seat, a front leg unit pivotally connected to a front end portion of the seat, a rear leg unit pivotally connected to a rear end portion of the seat, a chair back connected to a top end of the rear leg unit, at least one coupling rod unit, and a safety mechanism. The at least one coupling rod unit includes a first coupling rod that has opposite ends pivotally and respectively connected to the seat and the rear leg unit, a second coupling rod that has opposite ends pivotally and respectively connected to the front leg unit and the first coupling rod, and a third coupling rod that has opposite ends pivotally and respectively connected to the second coupling rod and the rear leg unit. The safety mechanism includes a blocking member that is disposed in proximity to the first coupling rod of the at least one coupling rod unit.
The folding chair is convertible between a folded state and an unfolded state. The first coupling rod is disposed under the seat when the folding chair is in the unfolded state, and is downwardly pivotable relative to the seat to convert the folding chair from the unfolded state to the folded state via pivotal movements of the second and third coupling rods.
When the folding chair is in the unfolded state, the blocking member is switchable between a locked state, in which the blocking member abuts against a bottom of the first coupling rod for blocking movement of the first coupling rod to maintain the folding chair in the unfolded state, and an unlocked state, in which the bottom of the first coupling rod is not obstructed by the blocking member, such that conversion of the folding chair to the folded stated is permitted.
Other features and advantages of the disclosure will become apparent in the following detailed description of the embodiment with reference to the accompanying drawings, of which:
Referring to
The seat 1 includes a base frame 11, and a seat cushion 12 mounted to the base frame 11. In this embodiment, the base frame 11 may be made of either plastic or metallic material, and the seat cushion 12 is made from a soft material. The base frame 11 has a rear portion formed with two grooves 111 that are spaced apart in the left-right direction (X).
The front leg unit 2 includes two front legs 21 that are spaced apart in the left-right direction (X) and that are pivotally connected to the front end portion of the seat 1, and a cross brace 22 that interconnects the front legs 21. The rear leg unit 3 includes two rear legs 31 that are spaced apart in the left-right direction (X). In this embodiment, the chair back 4 integrally extends from the top end of the rear leg unit 3.
The coupling rod units 5 interconnect the front leg unit 2 and the rear leg unit 3. Each of the coupling rod units 5 includes a first coupling rod 51 that has opposite ends pivotally and respectively connected to the seat 1 and the rear leg unit 3, a second coupling rod 52 that has opposite ends pivotally and respectively connected to the front leg unit 2 and the first coupling rod 51, and a third coupling rod 53 that has opposite ends pivotally and respectively connected to the second coupling rod 52 and the rear leg unit 3. Specifically, in this embodiment, for each of the coupling rod units 5, the opposite ends of the first coupling rod 51 are pivotally and respectively connected to the base frame 11 of the seat 1 and the corresponding one of the rear legs 31, the opposite ends of the second coupling rod 52 are pivotally and respectively connected to the cross brace 22 and the first coupling rod 51, and the opposite ends of the third coupling rod 53 are pivotally and respectively connected to the second coupling rod 52 and the corresponding one of the rear legs 31. In other embodiments, the folding chair may have only one coupling rod unit 5 instead of two.
The safety mechanism 6 is disposed in proximity to one of the coupling rod units 5, and includes a hollow blocking base 61 that is mounted to the bottom end of the base frame 11 of the seat 1 and that is in proximity to one of the grooves 111, a blocking member 62 that is mounted to the blocking base 61 and that is disposed in proximity to the first coupling rod 51 of the one of the coupling rod units 5, and a resilient member 63.
The blocking member 62 has a blocking portion 621 that extends through the blocking base 61 in the left-right direction (X), and a control portion 622 that is connected to the blocking portion 621 and that is disposed outside of the blocking case 61.
The blocking portion 621 has a first end section connected to the control portion 622, and a second end section opposite to the first end section. The second end section of the blocking portion 621 has a blocking surface 626 and a guiding surface 625 opposite to the blocking surface 626. A thickness of the second end section between the blocking surface 626 and the guiding surface 625 decreases in a direction away from the first end section of the blocking portion 621. In this embodiment, the guiding surface 625 is a curved surface.
The control portion 622 has a connecting portion 623 that is pivotally connected to the first end section of the blocking portion 621 and that abuts against the blocking base 61, and an access portion 624 that is connected transversely to the connecting portion 623 and that extends in a direction away from the blocking portion 621.
The resilient member 63 is mounted in the blocking base 61. In this embodiment, the resilient member 63 is a spring that is sleeved on the blocking portion 621 of the blocking member 62. The resilient member 63 has two opposite ends respectively in contact with and abutting against an inner surface of the blocking base 61 and the second end section of the blocking portion 621 of the blocking member 62.
The folding chair is convertible between a folded state (
Before the folding chair is to be folded into the folded state, a user can operate the control portion 622 of the blocking member 62 to switch the blocking member 62 from the locked state to an unlocked state (see
Referring to
Referring back to
In summary, the folding chair can be folded via the pivotal movement of the coupling rod units 5. The implementation of the safety mechanism 6 ensures that the folding chair would remain in the unfolded state unless the blocking member 62 of the safety mechanism 6 is switched to the unlocked state, ensuring that the folding chair cannot be folded unintentionally.
In the description above, for the purposes of explanation, numerous specific details have been set forth in order to provide a thorough understanding of the embodiment. It will be apparent, however, to one skilled in the art, that one or more other embodiments may be practiced without some of these specific details. It should also be appreciated that reference throughout this specification to “one embodiment,” “an embodiment,” an embodiment with an indication of an ordinal number and so forth means that a particular feature, structure, or characteristic may be included in the practice of the disclosure. It should be further appreciated that in the description, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of various inventive aspects, and that one or more features or specific details from one embodiment may be practiced together with one or more features or specific details from another embodiment, where appropriate, in the practice of the disclosure.
While the disclosure has been described in connection with what is considered the exemplary embodiment, it is understood that this disclosure is not limited to the disclosed embodiment but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.
