Collapsible wheelchair

Embodiments of the present disclosure provide a collapsible wheelchair, including: a movable chassis; a chair; a chair backrest; at least one first folding mechanism, installed between the movable chassis and the chair; and at least one second folding mechanism, connected between the chair and the chair backrest; where, the at least one first folding mechanism and the at least one second folding mechanism are connected in series and both have a four-rod linkage structure, and when the collapsible wheelchair is switched from a folded state to an open state or from the open state to the folded state, the at least one first folding mechanism and the at least one second folding mechanism are configured to move simultaneously. The collapsible wheelchair provided by the present disclosure is convenient in terms of the operation and easy to operate.

TECHNICAL FIELD

The present disclosure relates to a technical field of a folding mechanism and a wheelchair, in particular to a collapsible wheelchair.

BACKGROUND

A wheelchair is a chair equipped with wheels to help replace walking, and is an important mobile tool for home rehabilitation, turnaround transportation, medical treatment and going out for the wounded, sick and disabled. Wheelchairs can not only meet the transportation needs of people with physical disabilities and mobility difficulties, but also facilitate family members to move and take care of the sick, so that the sick can exercise and participate in social activities with the help of wheelchairs.

Wheelchairs have been the means of transportation for people with lower limb movement disability for a long time, which can be generally divided into electric wheelchairs and manual wheelchairs. In order to make it more convenient for users to use, the types of wheelchairs are becoming more and more diversified, for example, more and more collapsible wheelchairs have appeared for the convenience of users to take along with.

SUMMARY

The present disclosure provides a collapsible wheelchair, which can be switched from an open state to a folded state or from the folded state to the open state by only once-through operation, and the operation is convenient and easy to operate.

An embodiment of the present disclosure provides a collapsible wheelchair, including:a movable chassis;a chair;a chair backrest;at least one first folding mechanism, installed between the movable chassis and the chair; andat least one second folding mechanism, connected between the chair and the chair backrest;where, the at least one first folding mechanism and the at least one second folding mechanism are connected in series and both have a four-rod linkage structure, and when the collapsible wheelchair is switched from a folded state to an open state or from the open state to the folded state, the at least one first folding mechanism and the at least one second folding mechanism are configured to move simultaneously.

In an embodiment of the present disclosure, each of the first folding mechanisms includes a first support rod, a second support rod, a first connecting base and a second connecting base, where a first end of the first support rod and a first end of the second support rod are both hinged with the first connecting base, a second end of the first support rod and a second end of the second support rod are both hinged with the second connecting base, and the second connecting base is fixedly connected with the chair.

In an embodiment of the present disclosure, a position where the first support rod is hinged with the first connecting base is higher than a position where the second support rod is hinged with the first connecting base, and a position where the first support rod is hinged with the second connecting base is higher than a position where the second support rod is hinged with the second connecting base.

In an embodiment of the present disclosure, the at least one first folding mechanism has a parallelogram-like four-rod linkage structure.

In an embodiment of the present disclosure, each of the second folding mechanisms includes: a fourth support rod, a fifth support rod and a sixth support rod; where the collapsible wheelchair further includes a first extension end, a first end of the first extension end is fixedly connected with the second end of the second support rod, a second end of the first extension end is hinged with a first end of the fourth support rod, a second end of the fourth support rod is hinged with a first end of the sixth support rod, a second end of the sixth support rod is fixedly connected with the chair backrest, a first end of the fifth support rod is fixedly connected with the chair, a second end of the fifth support rod is hinged with the chair backrest.

In an embodiment of the present disclosure, the at least one second folding mechanism has an anti-parallelogram-like four-rod linkage structure.

In an embodiment of the present disclosure, a length of the fourth support rod is greater than a length of the first extension end and a length of the sixth support rod.

In an embodiment of the present disclosure, the at least one first folding mechanism includes two first folding mechanisms;the collapsible wheelchair further includes a first hinge rod, where the second connecting bases of the two first folding mechanisms are both provided with a first hinge hole; the second end of the first extension end and the first end of the fourth support rod are both hinged with the first hinge rod;when the collapsible wheelchair is switched from the folded state to the opened state, the first hinge rod extends into the first hinge holes; and when the collapsible wheelchair is switched from the open state to the folded state, the first hinge rod is separated from the first hinge holes.

In an embodiment of the present disclosure, the at least one first folding mechanism includes two first folding mechanisms;the collapsible wheelchair further includes:a second hinge rod, with which the second end of the first extension end and the first end of the fourth support rod are both hinged;a first cross rod, connected between the first support rods of the two first folding mechanisms or between the second support rods of the two first folding mechanisms; anda driving mechanism, connected with the first cross rod and driving the first cross rod to move, thereby driving the two first folding mechanisms to move.

In an embodiment of the present disclosure, the collapsible wheelchair further includes a pedal plate and two third folding mechanisms respectively corresponding to the two first folding mechanisms, and each of the third folding mechanisms includes: a second extension end, a first linkage and a second linkage;for each of the third folding mechanisms, a first end of the second extension end is hinged with the first end of the first support rod, a second end of the second extension end is hinged with a first end of the first linkage, a second end of the first linkage is hinged with a first end of the second linkage, and a second end of the second linkage is hinged with the pedal plate.

In an embodiment of the present disclosure, the collapsible wheelchair further includes a stopper, where the second linkage and the pedal plate are unidirectionally position-limited by the stopper.

In an embodiment of the present disclosure, the movable chassis is provided with a second cross rod, and the second cross rod is provided with two third linkages, the two third linkages are both provided with a second hinge hole, and the pedal plate is hinged between the two third linkages through the second hinge holes of the two third linkages.

In an embodiment of the present disclosure, the first connecting base is fixedly installed on the movable chassis, and the second connecting base is fixedly installed under the chair.

In an embodiment of the present disclosure, under the open state of the collapsible wheelchair, inclination directions of the first support rod and the second support rod are the same as an inclination direction of the chair backrest.

In an embodiment of the present disclosure, when the collapsible wheelchair is switched from the open state to the folded state, the at least one second folding mechanism is folded toward a forward direction of the collapsible wheelchair, and the at least one first folding mechanism is folded toward a direction opposite to the forward direction of the collapsible wheelchair.

In an embodiment of the present disclosure, under the folded state of the collapsible wheelchair, the movable chassis, the chair, and the chair backrest are stacked in parallel with each other.

In an embodiment of the present disclosure, the movable chassis includes a chassis frame, and under the folded state of the collapsible wheelchair, the at least one first folding mechanism is accommodated in the chassis frame.

In an embodiment of the present disclosure, the chassis frame has a quadrangular structure.

The collapsible wheelchair provided by the embodiments of the disclosure includes: a movable chassis; a chair; a chair backrest; at least one first folding mechanism, installed between the movable chassis and the chair; and at least one second folding mechanism, connected between the chair and the chair backrest; where, the at least one first folding mechanism and the at least one second folding mechanism are connected in series and both have a four-rod linkage structure, and when the collapsible wheelchair is switched from a folded state to an open state or from the open state to the folded state, the at least one first folding mechanism and the at least one second folding mechanism are configured to move simultaneously. The collapsible wheelchair provided by the present disclosure can be switched from an open state to a folded state or from the folded state to the open state by only once-through operation, and the operation is convenient and easy to operate.

It should be noted that in the attached drawings, the same reference numerals refer to the same or similar parts.

DESCRIPTION OF EMBODIMENTS

In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and comprehensively with reference to the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those ordinary skilled in the prior art without creative effort belong to the protection scope of the present disclosure.

It should be noted that, in the present disclosure, unless otherwise specified and limited, the term “connected” should be understood in a broad sense, for example, it can be a hinged connection manner, and it can also be other connection manners that enable two parts to rotate with each other.

As discussed above, in order to make it more convenient for users to use, the types of wheelchairs are becoming more and more diversified, for example, more and more collapsible wheelchairs have appeared for the convenience of users to take along with. However, most of the collapsible wheelchairs sold at present are manually collapsible wheelchairs, which need multiple steps to make the collapsible wheelchairs switch from an open state to a folded state or from the folded state to the open state, and are inconvenient to use.

In view of the above problems, the present disclosure provides a collapsible wheelchair, which can be switched from an open state to a folded state or from the folded state to the open state by only once-through operation, and the operation is convenient and easy to operate.

An embodiment of the present disclosure provides a collapsible wheelchair100, as shown inFIG.1, including: a movable chassis60(wheels are not shown in the drawings of the specification); a chair20; a chair backrest30; at least one first folding mechanism40, installed between the movable chassis60and the chair20, and accommodated in the movable chassis60under a folded state of the collapsible wheelchair100; and at least one second folding mechanism50, connected between the chair20and the chair backrest30; where, the at least one first folding mechanism40and the at least one second folding mechanism50are connected in series and both have a four-rod linkage structure. Generally, a four-rod linkage structure is a structure in which two connecting rods are both cranks, where the drive crank performs an isokinetic motion and the driven crank performs a variable motion. The four-rod linkage structure usually includes a parallelogram-like four-rod linkage structure and an anti-parallelogram-like four-rod linkage structure. In the present disclosure, the at least one first folding mechanism40can make the chair20switch from a folded state to an open state, or from the open state to the folded state; the at least one second folding mechanism50can make the chair backrest30switch from the folded state to the open state, or from the open state to the folded state. Since the at least one first folding mechanism40and the at least one second folding mechanism50are connected in series and both have a four-rod linkage structure, when the collapsible wheelchair100is switched from the folded state to the open state or from the open state to the folded state, the at least one first folding mechanism40and the at least one second folding mechanism50are configured to move simultaneously. That is, the first folding mechanism40and the second folding mechanism50can be folded or opened at the same time. For example, the at least one second folding mechanism50is made to be linked to the movement by swinging the at least one first folding mechanism40in a direction away from a horizontal plane (an upward direction as shown inFIGS.3-5), so as to realize the switch of the collapsible wheelchair100from the folded state to the opened state. At this time, the at least one second folding mechanism50is opened toward a direction opposite to a forward direction of the collapsible wheelchair100, and the at least one first folding mechanism40is opened toward the forward direction of the collapsible wheelchair100(a leftward direction as shown inFIGS.3-5). The forward direction of the collapsible wheelchair100is, for example, a direction in which the collapsible wheelchair100normally travels forward. On the contrary, the at least one second folding mechanism50is made to be linked to the movement by swinging the at least one first folding mechanism40in a direction toward the horizontal plane (a downward direction as shown inFIGS.3-5), so as to realize the switch of the collapsible wheelchair100from the open state to the folded state. At this time, the at least one second folding mechanism50is folded towards the forward direction of the collapsible wheelchair100, and the at least one first folding mechanism40is folded towards the direction opposite to the forward direction of the collapsible wheelchair100(a rightward direction as shown inFIGS.3-5).

The collapsible wheelchair provided by the present disclosure can be switched from an open state to a folded state or from the folded state to the open state by only once-through operation, and the operation is convenient and easy to operate. Drive force may be applied to the first folding mechanism40, or applied to the second folding mechanism50, or applied to both of the first folding mechanism40and the second folding mechanism50.

As shown inFIGS.2-6, at least one first folding mechanism40has a parallelogram-like four-rod linkage structure, and at least one second folding mechanism50has an anti-parallelogram-like four-rod linkage structure. It should be understood that the at least one first folding mechanism40and the at least one second folding mechanism50can also adopt other four-rod linkage structures, as long as they can be folded.

As shown inFIG.5, under the folded state of the collapsible wheelchair100, the movable chassis60, the chair20, and the chair backrest30are stacked in parallel with each other.

The switch of the first folding mechanism40between the folded state and the open state can be driven by a telescopic rod or manually driven by a user. The telescopic rod can be a push-rod motor, an electric telescopic rod, a hydraulic telescopic rod, a pneumatic telescopic rod or a gas-liquid mixing telescopic rod sold on the market. The present disclosure does not specifically limit the specific installation position of the telescopic rod, as long as it can drive the first folding mechanism40to switch between the folded state and the opened state.

Similar to the first folding mechanism40, the switch of the second folding mechanism50between the folded state and the opened state can be driven by a telescopic rod or manually driven by a user. The telescopic rod can be a push-rod motor, an electric telescopic rod, a hydraulic telescopic rod, a pneumatic telescopic rod or a gas-liquid mixing telescopic rod sold on the market. The present disclosure does not specifically limit the specific installation position of the telescopic rod, as long as it can drive the second folding mechanism50to switch between the folded state and the opened state.

Driving the first folding mechanism40can make the second folding mechanism50linked to the movement, whereas driving the second folding mechanism50can also make the first folding mechanism40linked to the movement.

In an embodiment of the present disclosure, under the open state of the collapsible wheelchair100, inclination directions of the first support rod41and the second support rod42are the same as an inclination direction of the chair backrest30, in this way, it is more convenient to fold the first folding mechanism40and thus fold the collapsible wheelchair100.

As shown inFIGS.2-6, the first folding mechanism40has a four-rod linkage structure, each of the first folding mechanisms40includes a first support rod41, a second support rod42, a first connecting base11and a second connecting base12, where a first end of the first support rod41and a first end of the second support rod42are both hinged with the first connecting base11, and a second end of the first support rod41and a second end of the second support rod42are both hinged with the second connecting base12, and the second connecting base12is fixedly connected with the chair20.

Specifically, the first end of the first support rod41can be hinged with the first connecting base11through an A hinge hole13, the second end can be hinged with the second connecting base12through a B hinge hole14, the first end of the second support rod42can be hinged with the first connecting base11through a C hinge hole15, and the second end can be hinged with the second connecting base12through a D hinge hole16.

In an embodiment of the present disclosure, the first connecting base11is fixedly installed on the movable chassis60, and the second connecting base12is fixedly installed under the chair20, in this way, the collapsible wheelchair100is more stable, and when the collapsible wheelchair100is switched between the open state and the folded state, the folding of the at least one first folding mechanism40and the at least one second folding mechanism50is more convenient and faster. Specifically, the first connecting base11can be directly and fixedly installed on the movable chassis60, or can be removably and fixedly installed on the movable chassis60through a connecting apparatus, and the second connecting base12can be directly and fixedly installed under the chair20, or can be removably and fixedly installed under the chair20through a connecting apparatus.

In an embodiment of the present disclosure, as shown inFIG.5, the chair20is parallel to the horizontal plane, and the first support rod41and the second support rod42are arranged obliquely in a vertical direction, in this way, it is more convenient to fold the first folding mechanism40and thus fold the collapsible wheelchair100. Specifically, a position where the first support rod41is hinged with the first connecting base11is higher than a position where the second support rod42is hinged with the first connecting base11, and a position where the first support rod41is hinged with the second connecting base12is higher than a position where the second support rod42is hinged with the second connecting base12. That is, in the first connecting base11, a location of the A hinge hole13is higher than a location of the C hinge hole15; and in the second connecting base12, a location of the B hinge hole14is higher than a location of the D hinge hole16.

In another embodiment of the present disclosure, in order to fold the first folding mechanism40more conveniently, and then the collapsible wheelchair100can be folded in the following way, so as to make the chair20parallel to the horizontal plane and make the first support rod41and the second support rod42arranged obliquely in the vertical direction: instead of being directly connected with the first connecting base11, the first support rod41is hinged with a connecting piece firstly, and the connecting piece is in turn fixedly connected with the first connecting base11. At this time, a location of the A hinge hole13is the same as a location of the C hinge hole15.

As shown inFIGS.2-6, the second folding mechanism has a four-rod linkage structure, and each of the second folding mechanisms50includes a fourth support rod51, a fifth support rod54and a sixth support rod53; the collapsible wheelchair100further includes a first extension end43, where a first end of the first extension end43is fixedly connected with the second end of the second support rod42, in this way, when the second support rod42moves, the first extension end43directly follows the movement and the first extension end43can be suspended and fixed, thereby a series connection between the at least one first folding mechanism40and the at least one second folding mechanism50is formed, thus the chair backrest30is supported. Specifically, the first end of the first extension end43may be integrally formed with the second end of the second support rod42, or may be fixedly connected with the second end of the second support rod42by other means. It should be noted that, as long as the first end of the first extension end43can be fixedly connected with the second end of the second support rod42, the present disclosure does not specifically limit the fixed connection manner between them.

In addition, a second end of the first extension end43is hinged with a first end of the fourth support rod51, a second end of the fourth support rod51is hinged with a first end of the sixth support rod53, a second end of the sixth support rod53is fixedly connected with the chair backrest30, a first end of the fifth support rod54(shown as an elbow between the chair20and the chair backrest30in the drawings) is fixedly connected with the chair20, a second end of the fifth support rod54is hinged with the chair backrest30, for example, through a hinge point31.

In this embodiment of the present disclosure, the first folding mechanism40and the second folding mechanism50are connected in series through the first extension end43, so as to realize that the second folding mechanism50is also switched from the folded state to the open state at the same time when the first folding mechanism40is switched from the folded state to the open state, and the second folding mechanism50is also switched from the open state to the folded state at the same time when the first folding mechanism40is switched from the open state to the folded state.

In an embodiment of the present disclosure, a length of the fourth support rod51is greater than a length of the first extension end43and a length of the sixth support rod53, in this way, it is more convenient to fold the first folding mechanism40and thus fold the collapsible wheelchair100.

In an embodiment of the present disclosure, as shown inFIG.2, in order to support the chair20more stably, the at least one first folding mechanism40includes two first folding mechanisms40. At this time, the two first folding mechanisms40can be respectively installed on the left and right sides of the movable chassis60, the first connecting bases11of the two first folding mechanisms40can be respectively installed on the left and right sides of the movable chassis60, and the second connecting bases12of the two first folding mechanisms40can be installed on the left and right sides under the chair20.

The collapsible wheelchair100further includes a first hinge rod52, where the second connecting bases12of the two first folding mechanisms40are both provided with a first hinge hole17; the second end of the first extension end43and the first end of the fourth support rod51are both hinged with the first hinge rod52.

In addition, both ends of the first hinge rod52are telescopic. Specifically, the first hinge rod52extends into the first hinge holes17when the collapsible wheelchair100is switched from the folded state to the opened state. More, specifically, the first folding mechanism40is driven to swing away from the horizontal plane, the first hinge rod52slides between the second connecting bases12of the two first folding mechanisms40, the second support rod42swings away from the horizontal plane, so that the first extending end43moves toward the horizontal plane; the first extension end43drives, through the fourth support rod51, the chair backrest30to rotate around the hinge point31toward a direction opposite to the forward direction of the collapsible wheelchair100, until the chair backrest30is under an open state. When the chair backrest30rotates toward the direction opposite to the forward direction of the collapsible wheelchair100, the first hinge rod52slides to the first hinge hole17, at this time, both ends of the first hinge rod52that are originally compressed lose the pressure from the second connecting base12and then extend and extend into the first hinge holes17.

When the collapsible wheelchair100is switched from the open state to the folded state, the first hinge rod52is separated from the first hinge holes17, and both ends of the first hinge rod52are compressed between the second connecting bases12of the two first folding mechanisms40and slide between the second connecting bases12of the two first folding mechanisms40, at this time, the first support rod41and the second support rod42are driven to swing toward the horizontal plane, then the chair20is folded; the first extension end43swings away from the horizontal plane at the same time when the second support rod42swings toward the horizontal plane, which drives the first hinge rod52to swing away from the horizontal plane, pushes, through the fourth support rod51, the chair backrest30to rotate around the hinge point31toward the forward direction of the collapsible wheelchair100, until the chair backrest30is under the folded state.

In this embodiment of the present disclosure, the retractility of both ends of the first hinge rod52can be controlled by an electrical manner, also by a manual manner, and the telescopic structure of both ends of the first hinge rod52can be a mechanical spring, an electric spring, a hydraulic apparatus, a pneumatic apparatus, etc. The present disclosure does not specifically limit the telescopic structure of the first hinge rod52, as long as the telescopic structure meets the use requirements.

A driving mechanism for driving the first folding mechanism40can act on the first support rod41, or on the second support rod42, or on the first extension end43or the first hinge rod52, or the driving mechanism can even directly act on the chair20. The present disclosure does not specifically limit the driving mechanism for driving the first folding mechanism40and the installation position thereof, as long as the first folding mechanism40can be driven to move.

In addition, the second folding mechanism50can also be driven to fold and open the collapsible wheelchair100provided by the present disclosure. A driving mechanism for driving the second folding mechanism50can act on the first extension end43, the first hinge rod52, the fourth support rod51or the sixth support rod53, or even directly act on the chair backrest30. The present disclosure does not specifically limit the driving mechanism for driving the second folding mechanism50and the installation position thereof, as long as the second folding mechanism50can be driven to move.

In addition, since only a drive force needs to be applied to any one of the first folding mechanism40and the second folding mechanism50and then it can be realized that the chair20and the chair backrest30can be opened or folded at the same time, the present disclosure does not specifically limit the drive force for driving the first folding mechanism40and the second folding mechanism50to move and which one of the first folding mechanism40and the second folding mechanism50is the driving force applied to, as long as any one of the first folding mechanism40and the second folding mechanism50can be driven to move.

In the embodiments of the present disclosure, the collapsible wheelchair100can be folded manually or electrically, and the collapsible wheelchair100can be folded in other ways. Taking manually folding of the collapsible wheelchair100provided by the present disclosure as an example, the wheelchair100can be directly folded after both ends of the first hinge rod52are contracted and separated from the first hinge hole17, or the folded wheelchair100can be opened manually until both ends of the first hinge rod52slide into the first hinge holes17and extend into the first hinge holes17.

In an embodiment of the present disclosure, similar to the above embodiments, the at least one first folding mechanism40includes two first folding mechanisms40.

In addition, as shown inFIG.6, the collapsible wheelchair100further includes: a second hinge rod55, with which the second end of the first extension end43and the first end of the fourth support rod51are both hinged; a first cross rod56, connected between the first support rods41of the two first folding mechanisms40or between the second support rods42of the two first folding mechanisms40; and a driving mechanism57, connected with the first cross rod56and driving the first cross rod56to move, thereby driving the two first folding mechanisms40to move.

In this embodiment of the present disclosure, the driving mechanism57can be fixedly installed on the movable chassis60, or under the chair20, or at other positions of the collapsible wheelchair100. The present disclosure does not specifically limit the installation position of the driving mechanism57, as long as the driving mechanism57can be connected with the first cross rod56and drive the first cross rod56to move.

In this embodiment of the disclosure, the driving mechanism57may be a push-rod motor or other driving mechanisms57that can be connected with the first cross rod56and drive the first cross rod56to move.

In an embodiment of the present disclosure, the collapsible wheelchair100further includes a pedal plate61for resting feet of a user. The pedal plate61can be folded alone or together with the chair20and the chair backrest30. In addition, the pedal plate61can also be folded manually, or by using a driving apparatus, so as to avoid the pedal plate61from forming a block when the user moves to the wheelchair.

When the pedal plate61is folded together with the chair20and the chair backrest30, the collapsible wheelchair100further includes two third folding mechanisms corresponding to the two first folding mechanisms40, where each of the third folding mechanisms includes: a second extension end68, a first linkage67and a second linkage66.

For each of the third folding mechanisms, a first end of the second extension end68is hinged with the first end of the first support rod41, a second end of the second extension end68is hinged with a first end of the first linkage67, a second end of the first linkage67is hinged with a first end of the second linkage66, and a second end of the second linkage66is hinged with the pedal plate61.

When the collapsible wheelchair is switched from the open state to the folded state, the first support rod41swings toward the horizontal plane and drives the pedal plate61to fold upwards through the second extension end68; when the collapsible wheelchair is switched from the folded state to the opened state, the first support rod41swings away from the horizontal plane, and drives the pedal plate61to rotate downward and open through the second extension end68.

In an embodiment of the present disclosure, the collapsible wheelchair100further includes a stopper65, where the second linkage66and the pedal plate61are unidirectionally position-limited by the stopper65, so as to avoid the pedal plate61from being excessively opened and being damaged after contacting with the ground. The stopper65is located at a position where the pedal61is hinged with the second linkage66. When the pedal plate61rotates to a vertical state, the stopper65limits positions of the second linkage66and the pedal plate61. The present disclosure does not limit the specific structure of the stopper65, as long as it can limit the positions of the second linkage66and the pedal plate61when the pedal plate61rotates to the vertical state.

In an embodiment of the present disclosure, in order to facilitate the installation of the pedal plate61, the movable chassis60is provided with a second cross rod64, and the second cross rod64is provided with two third linkages62, the two third linkages62are both provided with a second hinge hole63, and the pedal plate61is hinged between the two third linkages62through the second hinge holes63of the two third linkages62.

In an embodiment of the present disclosure, as shown inFIG.2, in order to avoid the back30from being broken due to long-term use, the at least one second folding mechanism50includes two second folding mechanisms50. At this time, the fourth support rods51of the two second folding mechanisms50are respectively installed at both ends of the first hinge rod52or the second hinge rod55, and the second ends of the fifth support rods54of the two second folding mechanisms50are respectively fixedly connected to the left and right sides of the lower end of the chair backrest30.

In an embodiment of the present disclosure, the at least one first folding mechanism40includes two first folding mechanisms40, and the at least one second folding mechanism50includes two second folding mechanisms50.

In addition, the collapsible wheelchair100further includes: a third hinge rod, with which the second end of the first extension end43and the first end of the fourth support rod51are hinged; a third cross rod, connected between the fourth support rods51of the two second folding mechanisms50or the fifth support rods54of the two second folding mechanisms50or the sixth support rods53of the two second folding mechanisms50; and a driving mechanism, connected with the third cross rod and driving the third cross rod to move, thereby driving the two second folding mechanisms50to move.

In this embodiment of the present disclosure, the driving mechanism can be fixedly installed on the movable chassis60, or under the chair20, or at other positions of the collapsible wheelchair100. The present disclosure does not specifically limit the installation position of the driving mechanism, as long as the driving mechanism can be connected with the third cross rod and drive the third cross rod to move.

In other embodiments of the present disclosure, the collapsible wheelchair100may include other numbers of the first folding mechanisms40and the second folding mechanisms50.

For example, the collapsible wheelchair100may include one first folding mechanism40and one second folding mechanism50. At this time, one end of the first folding mechanism40is connected to the middle of the movable chassis60and the other end is connected to the middle under the chair20; the fourth support rod51of the second folding mechanism50is hinged to the middle of the first hinge rod52or the second hinge rod55, and the chair20and the chair backrest30are hinged together through an elbow (the fifth support rod54).

For another example, the collapsible wheelchair100may include one first folding mechanism40and two second folding mechanisms50. At this time, one end of the first folding mechanism40is connected to the middle of the movable chassis60and the other end is connected to the middle under the chair20; the fourth support rods51of the two second folding mechanisms50are respectively installed at both ends of the first hinge rod52or the second hinge rod55, and the second ends of the fifth support rods54of the two second folding mechanisms50are respectively fixedly connected to the left and right sides of the lower end of the chair backrest30.

In an embodiment of the present disclosure, the movable chassis60includes a chassis frame69having a quadrangular structure. The chassis frame69leaves space for an arrangement of electrical components such as batteries. Under the folded state of the collapsible wheelchair100, the at least one first folding mechanism40is accommodated in the chassis frame69, which avoids the chair20from interfering with a front wheel of the collapsible wheelchair100and the battery when the chair20is folded, and makes the structure design of the collapsible wheelchair100provided by the present disclosure compact, small and delicate.

The above specific embodiments do not constitute a limitation on the protection scope of the present disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present disclosure shall be contained in the protection scope of the present disclosure.