Folding Chair for Safety Use

This application claims priority to Chinese patent application number 202420606554.5, filed on Mar. 27, 2024. Chinese patent application number 202420606554.5 is incorporated herein by reference.

The present disclosure relates to the field of furniture, and specifically relates to a folding chair for safety use.

A folding chair comprises a front leg, a rear leg, and a seat plate, and the front leg and the rear leg are pivotally connected to the seat plate. Through a relative rotation of the front leg and rear leg, the folding chair can be unfolded and folded at will, making it easy to store and use.

Traditional folding chairs limit an opening degree of the folding chair by setting a stop structure in a rear leg tube, but the traditional folding chairs do not lock in an open state. This causes the traditional folding chairs to fold unintentionally by a user when in the open state. For the user, especially children, the safety needs to be improved.

The present disclosure provides a folding chair for safety use to solve the deficiencies in the background.

A technical solution of the present disclosure is as follows.

A folding chair for safety use comprises a seat plate and two support frames symmetrically disposed on a left side and a right side of the seat plate. Each of the two support frames comprises a front leg and a rear leg, and the rear leg comprises a rear leg tube and a moving tube movably disposed in the rear leg tube. The rear leg tube and the front leg are respectively pivotally connected to the seat plate, and the moving tube is pivotally connected to the front leg. The rear leg is configured to be extended to cause the folding chair to be in a folded state, and the rear leg is configured to be contracted to cause the folding chair to be in an unfolded state. At least one of the two support frames comprises a locking member. The locking member is movably disposed on the rear leg tube so that the locking member is detachably connected to the moving tube in a locked position, or the locking member is movably disposed on the front leg or a joint between the front leg and the moving tube so that the locking member is detachably connected to the rear leg tube in the locked position. When in the locked position, the locking member is configured to prevent the moving tube from moving in the rear leg, and the locking member is configured to be released to enable the moving tube to freely move.

In a preferred embodiment, the folding chair further comprises a rotating arm. A first end of the rotating arm is pivotally connected to the moving tube, the front leg, or the joint between the front leg and the moving tube, and a second end of the rotating arm is a free end which defines the locking member. The locking member is a buckle sub-piece, and a wall of the rear leg tube comprises a buckle piece configured to be buckled to the buckle sub-piece. When the rear leg is contracted, the buckle sub-piece is locked to the buckle piece in the locked position, and the folding chair is locked in the unfolded state.

In a preferred embodiment, a third end of the rotating arm away from the buckle sub-piece extends to define a handle, and the folding chair comprises an elastic member. The elastic member is a torsion spring, and a spring body of the torsion spring is sleeved on the first end of the rotating arm. A first torsion arm of the torsion spring is fixedly disposed on the moving tube, the front leg, or the joint between the front leg and the moving tube, and a second torsion arm of the torsion spring abuts the buckle sub-piece. When the folding chair is in the folded state, the torsion spring is in a free state.

In a preferred embodiment, the front leg is pivotally connected to the moving tube through a hinge, and the rotating arm is pivotally connected to the joint between the front leg and the moving tube.

In a preferred embodiment, the locking member is a locking pin, and the rear leg tube comprises a first locking hole. The moving tube comprises a second locking hole, and the locking pin is movably disposed in an axial direction of the first locking hole. When the rear leg is contracted: the first locking hole and the second locking hole correspond to each other, the locking pin is locked to the first locking hole and the second locking hole at the same time in the locked position, and the folding chair is locked in the unfolded state.

In a preferred embodiment, a bottom end of the moving tube comprises a guiding slope inclining gradually away from a central axis of the moving tube from bottom to top.

In a preferred embodiment, the folding chair further comprises a rotating arm and an elastic member. A first end of the rotating arm is pivotally connected to the rear leg tube, and a second end of the rotating arm is a free end pivotally connected to the locking pin. Two opposite ends of the elastic member respectively abuts the rotating arm and the rear leg tube. When the locking pin is in the locked position, the elastic member is in a free state.

In a preferred embodiment, a third end of the rotating arm away from the locking pin extends to define a handle, the elastic member abuts the handle and the rear leg tube, and the elastic member is a compression spring.

In a preferred embodiment, the rotating arm is pivotally connected to the rear leg tube, and an outer wall of the rear leg tube is disposed with a handle position-limiting groove configured to correspond to the handle. The locking member is a buckle sub-piece, and when the handle is buckled to the handle position-limiting groove, the buckle sub-piece is at a farthest position from the rear leg tube or the moving tube.

In a preferred embodiment, the rear leg tube further comprises a fixed rivet fixedly inserted into a wall of the rear leg tube, and a length of the fixed rivet entering the rear leg tube is greater than a distance between an inner wall of the rear leg tube and an outer wall of the moving tube. When the folding chair is in the unfolded state, a bottom end of the moving tube abuts the fixed rivet.

The technical solution at least has the following advantages. The locking member in the locked position can prevent the moving tube from moving, so that folding chair can be locked to be in the unfolded state and the folding chair can be prevented from unexpectedly folding during use, which improves safety during use.

The present disclosure will be further described below in combination with the accompanying drawings and embodiments. The contraction of a rear leg mentioned in this application refers to a state in which an insertion length of a moving tube relative to a rear leg tube is the largest and a total length of the rear leg is the smallest. On the contrary, extension of the rear leg mentioned in this application refers to a state of the insertion length of the moving tube relative to the rear leg tube being the smallest. Correspondingly, when the rear leg is “contracted”, an inclined angle between a front leg and the rear leg is the largest, and a folding chair is in an “unfolded” state. When the rear leg is “extended”, the inclined angle between the front leg and the rear leg is the smallest, and the front leg and the rear leg are almost parallel. At this time, the folding chair is in a “folded” state.

Referring to, this embodiment provides a folding chair with a locking member, and the folding chair comprises a seat plateand two support frames symmetrically disposed on a left side and a right side of the seat plate. Each of the two support frames comprises a front legand a rear leg, and the rear legcomprises a rear leg tubeand a moving tubemovably inserted into the rear leg tube. The rear leg tubeand the front legare respectively pivotally connected to the seat plate. The front legis sleeved with a hinge, and the moving tubeand the front legare pivotally connected to the hinge. When the rear legis extended, the folding chair is in a folded state, and when the rear legis contracted, the folding chair is in an unfolded state.

Referring to, at least one of the two support frames comprises the locking member. In this embodiment, the folding chair comprises a rotating arm. The locking member is a buckle sub-piece. An end of the rotating arm, the moving tube, and the hingeare pivotally connected together. The buckle sub-pieceis defined by a free end of the rotating arm. The rear leg tubecomprises a buckle pieceat a corresponding position. The buckle pieceis a buckle groove. When the rear legis contracted, the rotating armis positioned at a locking position through cooperation between the buckle sub-pieceand the buckle piece.

An end of the rotating armaway from the locking member is extended to define a handle. By pressing the handle, the rotating armcan rotate relative to the rear leg, so that the buckle sub-piececooperates with the buckle pieceto define a locked connection or release the locked connection.

In addition, referring to, the folding chair comprises an elastic member, which is a torsion spring. Specifically, the torsion springcomprises a spring bodyand two torsion armslocated at two ends of the spring body. The spring bodyis sleeved on a hinge point of the rotating arm. A first of the two torsion armsis fixedly connected to the hingeof the front leg, and a second of the two torsion armsabuts the handle.

The structure of the folding chair will be further described below based on state changes of the folding chair.

When the folding chair is in the unfolded state, referring to, the moving tubeand the rear leg tubeare in a contracted state. At this time, an insertion length of the moving tubeand the rear leg tubeis the largest, and a total length of the rear legis the smallest. The buckle sub-pieceof the rotating armis buckled to the buckle pieceof the rear leg tube. The two torsion armsof the torsion springare adjacent to each other to generate an elastic force that drives the two torsion armsto move away from each other. The elastic force enables the free end of the rotating armthat defines the buckle sub-pieceto be adjacent to the buckle piecethrough transmission of the handleof the rotating armand the hinge point, making the locking connection between the buckle pieceand the buckle sub-piecemore stable and foldable, and making the folding chair be locked in the folded position.

The handleis pressed to release the locking connection between the buckle sub-pieceand the buckle piece. As shown in, after the locking member is released, the rear legis rotated toward the front legin a direction of being adjacent to the front leg, and the moving tubeslides relative to the rear leg tubeuntil the rear legis in an extended state as shown in, and. At this time, it can be seen fromthat the torsion springis in a state of no deformation. Therefore, the folded state is relatively stable, and an external force needs to be applied to the folding chair to open the folding chair.

This embodiment provides a folding chair with a locking member. Referring to, the folding chair comprises a seat plateand two support frames symmetrically disposed on a left side and a right side of the seat plate. Each of the two support frames comprises a front legand a rear leg. The rear legcomprises a rear leg tubeand a moving tubemovably inserted into the rear leg tube. The rear leg tubeand the front legare respectively pivotally connected to the seat plate, and the front legis sleeved with a hinge (i.e., the same as the hingein Embodiment 1). The moving tubeis pivotally connected to the hingeof the front leg. When the rear legis extended, the folding chair is in a folded state as shown in. When the rear legis contracted, the folding chair is in an unfolded state as shown in.

At least one of the two support frames comprises the locking member. As shown in, the locking member is a locking pin. The rear leg tubecomprises a first locking holecorresponding to the locking pin, and the moving tubecomprises a second locking holeconfigured to correspond to the locking pin. The locking pinis movably disposed in an axial direction of the first locking hole. Further, the folding chair comprises a rotating arm. An end of the rotating armis pivotally connected to the rear leg tube, the other end of the rotating armis a free end, and the free end of the rotating armis pivotally connected to the locking pin.

The rear leg tubefurther comprises a fixed rivet. The fixed rivetis fixedly inserted into a wall of the rear leg tubeand penetrates through the rear leg tube. When the folding chair is in the unfolded state, a bottom end of the moving tubeabuts the fixed rivet.

An end of the rotating armopposite to the locking pindefines a handle. The rear leg tubecomprises a handle position-limiting groovecorresponding to the handle. A compression springis disposed adjacent to the handle position-limiting groove. One end of the compression springabuts the rear leg tube, and the other end of the compression springabuts the handle. When the handleis separated from the rear leg tube, the compression springis at its original length. When the handleabuts the handle position-limiting groove, the compression springis in a compressed state as shown in.

The bottom end of the moving tubehas a guiding slopeinclining gradually away from a central axis of the moving tubefrom bottom to top. When the moving tubeslides downward, as shown in, the guiding slopeabuts the locking pinto drive the locking pinto relatively rotate away from the rear leg tube.

The structure of the folding chair will be further described below based on state changes of the folding chair.

Referring to, when the folding chair is in the folded state, the locking pinis locked to the rear leg tube, and the handleis separated from the handle position-limiting groove. The rear legof the folding chair is rotated in a direction away from the front leg, and an insertion length of the moving tuberelative to the rear leg tubeincreases until the moving tubeand the rear leg tubeare in the contracted state. During this process, as shown in, the moving tubefirst abuts the locking pin, and the locking pinis driven by pressing of the guiding slopeto drive the end of the rotating armpivotally connected with the locking pinto rotate in a direction away from the rear leg tubewhile the locking pinis always in contact with the first locking holeof the rear leg tube. As shown in, when the rear legis in the contracted state, the bottom end of the moving tubeabuts the fixed rivet, the first locking holeof the rear leg tubeand the second locking holeof the moving tubecorresponds to each other, and the locking pinsimultaneously passes through the first locking holeof the rear leg tubeand the second locking holeof the moving tube, so that a relative position between the rear leg tubeand the moving tubeare fixed and the folding chair is locked in the unfolded state.

As shown in, to release the locking member, the handleis pressed so that the handleenters the handle position-limiting grooveand the locking pinis separated away from the second locking holeof the moving tubeto release the moving tube.

The aforementioned embodiments are merely some embodiments of the present disclosure, and the scope of the disclosure is not limited thereto. Thus, it is intended that the present disclosure cover any modifications and variations of the presently presented embodiments provided they are made without departing from the appended claims and the specification of the present disclosure.