Electric wheelchair folding handrail assembly and electric wheelchair

Abstract

The utility model discloses a kind of folding hand push frame assembly of electric wheelchair and electric wheelchair, belong to wheelchair technical field.The folding hand push frame assembly of the utility model, including mounting bracket, connecting seat, hand push rod and unlocking mechanism, mounting bracket is fixedly installed on the seat plate of electric wheelchair;Connecting seat is rotatably installed at the rear end of mounting bracket;Hand push rod is fixedly arranged on connecting seat, can be rotated between unfolded state and folding state;Unlocking mechanism is located between connecting seat and mounting bracket, for locking hand push rod in unfolded state, and can be unlocked to make hand push rod rotate and switch to folding state.Hand push rod of the utility model is installed on the seat plate of electric wheelchair by mounting bracket, power is transmitted to seat plate in pushing process, avoid pushing backboard and affect comfort;Hand push rod can be unlocked folding or unfolded locking by unlocking mechanism, after folding, it occupies small space, after unfolding, locking is firm and reliable, with the advantages such as simple structure compact, flexible and convenient operation.

Description

Technical Field

[0001] This utility model relates to an electric wheelchair, and more specifically, to an electric wheelchair folding push frame assembly and an electric wheelchair. Background Technology

[0002] As an innovative tool for assisting mobility, electric wheelchairs are increasingly becoming important "partners" for the elderly and those with mobility impairments in their pursuit of independent living. Electric wheelchairs can be controlled via a controller to move forward, backward, and turn, eliminating the need for hands to control the wheels or for someone to push them, as is the case with traditional wheelchairs. Therefore, the push handles used on traditional wheelchairs are somewhat redundant, which is the main reason why many electric wheelchairs have eliminated them. For example, Chinese Patent Publication No. CN221998225U discloses "A Foldable Electric Wheelchair" (publication date November 15, 2024), which can move independently without being pushed, thus eliminating the need for a push frame and facilitating folding.

[0003] However, there is still a need to push wheelchairs in some special scenarios, such as when an electric wheelchair is running out of power or when a friend or family member is pushing it for a walk. Although the frequency of use of this pushing function is not high on electric wheelchairs, many consumers hope to retain this function. Chinese Patent Publication No. CN208525259U discloses a "foldable electric wheelchair" (publication date: February 22, 2019). The electric wheelchair has a foldable push handle device on the backrest. It includes a push handle rotatably connected to the backrest and a fixing device disposed between the backrest and the push handle, which locks the rotational position of the push handle relative to the backrest when the push handle is rotated to the correct position. During the rotation of the push handle relative to the backrest, when the push handle is rotated to the correct position, the baffle disposed on the backrest and the limiting block disposed on the push handle abut against each other. At this time, the actuating wrench causes at least a part of the eccentric cam body to drive the fixed shaft to extend into the fixing hole. At the same time, the return spring is compressed by the stop and is in a compressed state. When the eccentric cam body is rotated to reduce the thrust on the fixed shaft, the pressure of the stop on the compressed return spring also decreases. The return spring resets and drives the fixed shaft to disengage from the fixing hole and retract into the fixing body, thereby facilitating the rotation of the push handle. The pusher device is installed on the backrest and uses the backrest to transmit force during the push. Although this is a common practice in traditional wheelchairs, in electric wheelchairs, the backrest is often elastic to ensure comfort. This means that during the push, the force can easily be transmitted to the back of the rider through the backrest, affecting the comfort of the wheelchair user. Summary of the Invention

[0004] 1. Technical problem to be solved by the utility model

[0005] The purpose of this utility model is to overcome the aforementioned shortcomings of existing electric wheelchair pushers and provide an electric wheelchair folding pusher assembly and an electric wheelchair. Using the technical solution of this utility model, a folding pusher assembly is integrated into the electric wheelchair, allowing the electric wheelchair to retain its pushing function. The pusher is mounted on the seat of the electric wheelchair via a mounting bracket, transmitting force to the seat during pushing and avoiding pushing the backrest, which would affect comfort. Simultaneously, the pusher can be unlocked and folded or unfolded and locked via an unlocking mechanism. When folded, it occupies little space; when unfolded, it is securely and reliably locked, offering advantages such as simple and compact structure and flexible and convenient operation.

[0006] In addition, the electric wheelchair's lifting and folding mechanism is driven by an electric push rod, which facilitates the lifting and lowering control of the seat. This allows for easy adjustment of the seat height while seated, further improving the electrification level and ease of operation of the electric wheelchair.

[0007] 2. Technical Solution

[0008] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0009] This utility model discloses an electric wheelchair folding pusher assembly, including...

[0010] The mounting bracket is fixedly installed on the seat of the electric wheelchair;

[0011] A connecting seat, which is rotatably mounted on the rear end of the mounting bracket;

[0012] The push rod is fixedly mounted on the connecting seat and can rotate relative to the mounting bracket between the unfolded and folded states.

[0013] The unlocking mechanism, located between the connecting seat and the mounting bracket, is used to lock the push rod in the unfolded state and can be unlocked to allow the push rod to rotate and switch to the folded state.

[0014] Furthermore, the front part of the mounting bracket has a front connecting plate for connecting the front end of the base plate, the rear part of the mounting bracket has a rear connecting plate for connecting the rear end of the base plate, and the rear end of the mounting bracket also has an extension section extending towards the rear side of the base plate, and the connecting seat is mounted on the extension section of the mounting bracket via a pivot.

[0015] Furthermore, the rotating shaft includes a bushing and a locking bolt. The rear end of the mounting bracket is provided with a connecting hole, and the connecting seat is provided with a shaft hole corresponding to the connecting hole. The bushing passes through the connecting hole and the corresponding shaft hole in sequence, and the locking bolt passes through the bushing and is threadedly connected to the connecting seat.

[0016] Furthermore, the mounting bracket is provided on each of the left and right sides of the base plate, the push rod is "n" shaped, and the two ends of the push rod are respectively connected to the corresponding mounting bracket through the connecting seat. The unlocking mechanism is an unlocking pull line that synchronously controls the unlocking or locking of the connecting seat and the mounting bracket on the left and right sides.

[0017] Furthermore, the connecting seat is provided with a pin hole, and the two ends of the unlocking cable are respectively connected to pins located in the pin holes of the corresponding connecting seats. The pins are also fitted with springs to keep the pins elastically extending towards the mounting bracket. The mounting bracket has a locking hole that cooperates with the pin. When the push rod is in the extended state, the pin is located in the locking hole to lock the push rod. When the unlocking cable is pulled, the pins on the left and right sides simultaneously retract from the corresponding locking holes to unlock and rotate the push rod.

[0018] Furthermore, the end of the push rod near the connecting seat is also provided with a reinforcing crossbar, and the reinforcing crossbar and the unlocking cable are at a distance that allows one hand to grasp both the reinforcing crossbar and the unlocking cable at the same time.

[0019] This utility model discloses an electric wheelchair, including a chassis, front wheels, rear wheels, a lifting and folding mechanism, a seat, and a backrest. The front wheels are omnidirectional wheels and are installed at the front of the chassis. The rear wheels are drive wheels and are installed at the rear of the chassis. The seat is mounted on the chassis via the lifting and folding mechanism. The backrest is hinged to the rear of the seat. The aforementioned electric wheelchair folding push frame assembly is also installed on the seat.

[0020] Furthermore, foldable armrests are installed on both the left and right sides of the seat.

[0021] Furthermore, the lifting and folding mechanism includes a first support arm, a second support arm, and a lifting electric push rod. The lower ends of the first and second support arms are respectively hinged to the lower support seat on the chassis, and the upper ends of the first and second support arms are respectively hinged to the upper connecting seat at the bottom of the seat plate, so that the first support arm, the lower support seat, the second support arm, and the upper connecting seat are sequentially connected to form a four-bar linkage mechanism. The lower end of the lifting electric push rod is hinged to the chassis, and the upper end is hinged to the upper connecting seat.

[0022] Furthermore, the front end of the chassis is provided with a retractable foot pedal, and a telescopic electric push rod for driving the foot pedal to extend and retract is provided between the chassis and the foot pedal.

[0023] 3. Beneficial effects

[0024] Compared with existing known technologies, the technical solution provided by this utility model has the following beneficial effects:

[0025] (1) The present invention provides an electric wheelchair folding push frame assembly, which includes a mounting bracket, a connecting seat, a push rod and an unlocking mechanism. The push rod is mounted on the seat of the electric wheelchair through the mounting bracket, so that the electric wheelchair retains the pushing function and the force is transmitted to the seat during the pushing process, which can avoid pushing the back panel and affecting comfort. At the same time, the push rod can be unlocked and folded or unfolded and locked through the unlocking mechanism. When folded, it occupies little space, and when unfolded, it is firmly and reliably locked. It has the advantages of simple and compact structure and flexible and convenient operation.

[0026] (2) The electric wheelchair folding push frame assembly of the present invention has a front connecting plate for connecting the front end of the seat plate at the front part of the mounting bracket and a rear connecting plate for connecting the rear end of the seat plate at the rear part of the mounting bracket. The mounting bracket is firmly and reliably connected to the seat plate at the front and rear. The rear end of the mounting bracket also has an extension section extending to the rear side of the seat plate. The connecting seat is mounted on the extension section of the mounting bracket through a pivot, so that the push rod can be located just behind the backrest when unfolded, which facilitates the pushing of the electric wheelchair.

[0027] (3) The electric wheelchair folding push frame assembly of this utility model has a rotating shaft including a bushing and a locking bolt. The rear end of the mounting bracket is provided with a connecting hole, and the connecting seat is provided with a shaft hole corresponding to the connecting hole. The bushing passes through the connecting hole and the corresponding shaft hole in sequence. The locking bolt passes through the bushing and is threadedly connected to the connecting seat. The connecting seat and the mounting bracket are easy to assemble and rotate flexibly.

[0028] (4) An electric wheelchair folding push frame assembly of the present invention has a mounting bracket on each of the left and right sides of the seat plate, and the push rod is "n" shaped. The two ends of the push rod are connected to the corresponding mounting brackets through connecting seats. The unlocking mechanism is an unlocking pull line that synchronously controls the unlocking or locking of the connecting seats and mounting brackets on the left and right sides. The unlocking pull line enables simultaneous unlocking on both sides, and the unlocking operation is quick and convenient.

[0029] (5) The electric wheelchair folding push frame assembly of this utility model has a pin hole on its connecting seat. The two ends of the unlocking cable are respectively connected to the pin holes in the corresponding connecting seats. The pin is also fitted with a spring to keep the pin elastically extending towards the mounting bracket. The mounting bracket has a locking hole that cooperates with the pin. When the push rod is in the unfolded state, the pin is located in the locking hole to lock the push rod. When the unlocking cable is pulled, the pins on the left and right sides simultaneously exit from the corresponding locking holes to unlock and rotate the push rod. The above-mentioned pin structure is simple and compact, reliable in locking, and easy and convenient in unlocking.

[0030] (6) The electric wheelchair folding push frame assembly of this utility model has a reinforcing crossbar at one end of the push rod near the connecting seat. The reinforcing crossbar and the unlocking cable are at a distance that allows one hand to grasp the reinforcing crossbar and the unlocking cable at the same time. The reinforcing crossbar can be used to grasp and pull the unlocking cable, thereby easily and conveniently unlocking and folding the push rod.

[0031] (7) An electric wheelchair of the present invention includes a walking chassis, front wheels, rear wheels, a lifting and folding mechanism, a seat and a backrest. The front wheels are omnidirectional wheels and are installed at the front of the walking chassis. The rear wheels are drive wheels and are installed at the rear of the walking chassis. The seat is installed on the walking chassis through the lifting and folding mechanism. The backrest is hinged to the rear side of the seat. The above-mentioned electric wheelchair folding push frame assembly is also installed on the seat. By integrating the folding push frame assembly on the electric wheelchair, the pushing function is retained on the electric wheelchair, and it can be folded together when the wheelchair is folded. After folding, it occupies little space and is easy to carry.

[0032] (8) An electric wheelchair of this utility model has a lifting and folding mechanism including a first support arm, a second support arm and a lifting electric push rod. The lower ends of the first support arm and the second support arm are respectively hinged to the lower support seat on the walking chassis, and the upper ends of the first support arm and the second support arm are respectively hinged to the upper connecting seat at the bottom of the seat plate. The first support arm, the lower support seat, the second support arm and the upper connecting seat are sequentially connected to form a four-bar linkage mechanism. The electric push rod drives the four-bar linkage mechanism to lift and lower, so that the seat plate height can be conveniently adjusted while sitting in the wheelchair, which further improves the electrification level and ease of operation of the electric wheelchair.

[0033] (9) An electric wheelchair of this utility model is provided with a retractable foot pedal at the front end of its walking chassis. A retractable electric push rod for driving the foot pedal to extend and retract is provided between the walking chassis and the foot pedal, thereby realizing the electric extension and retraction control of the foot pedal and facilitating the adjustment of the extension length of the foot pedal. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the unfolded structure of a folding push-pull frame assembly of the present invention on an electric wheelchair;

[0035] Figure 2 This is a three-dimensional structural diagram of the unfolded state of an electric wheelchair folding push frame assembly according to the present invention.

[0036] Figure 3 This is a schematic diagram showing the disassembled structure of an electric wheelchair folding push frame assembly according to this utility model;

[0037] Figure 4 This is a schematic diagram of the folding structure of a folding push frame assembly of this utility model on an electric wheelchair;

[0038] Figure 5 This is a three-dimensional structural diagram of the folded state of an electric wheelchair folding push frame assembly according to the present invention;

[0039] Figure 6 This is a three-dimensional structural diagram of an electric wheelchair according to the present invention;

[0040] Figure 7 This is a three-dimensional structural diagram of the main body of an electric wheelchair according to the present invention;

[0041] Figure 8 This is a cross-sectional structural diagram of the main body of an electric wheelchair according to the present invention.

[0042] Explanation of the labels in the diagram:

[0043] 100. Hand-operated frame assembly; 101. Mounting bracket; 101a. Front connecting plate; 101b. Rear connecting plate; 101c. Connecting hole; 101d. Locking hole; 102. Connecting seat; 102a. Shaft hole; 103. Hand push rod; 103a. Reinforcing crossbar; 104. Unlocking cable; 104a. Pin; 104b. Spring; 105. Rotating shaft; 105a. Bushing; 105b. Locking bolt;

[0044] 200. Electric wheelchair; 201. Walking chassis; 201a. Lower support seat; 202. Front wheel; 203. Rear wheel; 204. Lifting and folding mechanism; 204-1. First support arm; 204-2. Second support arm; 204-3. Lifting electric push rod; 205. Seat plate; 205a. Upper connecting seat; 206. Backrest; 207. Armrest; 208. Foot pedal; 209. Telescopic electric push rod. Detailed Implementation

[0045] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings and embodiments.

[0046] [Example 1]

[0047] Combination Figures 1 to 5As shown, an electric wheelchair folding push frame assembly of this embodiment mainly includes a mounting bracket 101, a connecting seat 102, a push rod 103, and an unlocking mechanism. The mounting bracket 101 is fixedly mounted on the seat plate 205 of the electric wheelchair 200. The connecting seat 102 is rotatably mounted on the rear end of the mounting bracket 101. The push rod 103 is fixedly mounted on the connecting seat 102 and can rotate relative to the mounting bracket 101 between an unfolded state and a folded state. The unlocking mechanism is located between the connecting seat 102 and the mounting bracket 101 and is used to lock the push rod 103 in the unfolded state and can be unlocked to allow the push rod 103 to rotate and switch to the folded state. In this embodiment, by integrating a folding push frame assembly 100 into the electric wheelchair 200, the electric wheelchair 200 retains its pushing function. The push rod 103 is mounted on the seat plate 205 of the electric wheelchair 200 via a mounting bracket 101. During pushing, the force is transmitted to the seat plate 205, which can prevent the backrest from being pushed and affecting comfort. At the same time, the push rod 103 can be unlocked and folded or unfolded and locked through an unlocking mechanism. When folded, it occupies little space, and when unfolded, it is firmly and reliably locked. It has the advantages of simple and compact structure and flexible and convenient operation.

[0048] like Figure 2 and Figure 3 As shown, in this embodiment, the front of the mounting bracket 101 has a front connecting plate 101a for connecting the front end of the seat plate 205, and the rear of the mounting bracket 101 has a rear connecting plate 101b for connecting the rear end of the seat plate 205. The rear end of the mounting bracket 101 also has an extension section extending towards the rear side of the seat plate 205. The connecting seat 102 is mounted on the extension section of the mounting bracket 101 via a pivot 105. Specifically, the front connecting plate 101a is preferably a right-angle connector, which is fixed to the front of the mounting bracket 101 by bolts or welding and bolted to the bottom surface of the front end of the seat plate 205; the rear connecting plate 101b is preferably a flat plate structure, which is fixed to the rear end of the mounting bracket 101 by bolts or welding and bolted to the rear side wall of the seat plate 205. By mounting the connecting seat 102 on the extension section of the mounting bracket 101, the push rod 103 can be positioned just behind the back of the wheelchair when it is unfolded, facilitating the pushing of the electric wheelchair.

[0049] like Figure 3As shown, in this embodiment, the aforementioned rotating shaft 105 includes a bushing 105a and a locking bolt 105b. The rear end of the mounting bracket 101 is provided with a connecting hole 101c, and the connecting seat 102 is provided with a shaft hole 102a corresponding to the connecting hole 101c. The bushing 105a is sequentially inserted into the connecting hole 101c and the corresponding shaft hole 102a. The locking bolt 105b is inserted into the bushing 105a and threadedly connected to the connecting seat 102. The bushing 105a is fixed to the connecting seat 102 by the locking bolt 105b and rotates with the mounting bracket 101, thereby allowing the entire push rod 103 to rotate freely around the bushing 105a, making assembly convenient and rotation flexible.

[0050] Reference Figures 1 to 5 As shown, in this embodiment, a mounting bracket 101 is provided on each of the left and right sides of the base plate 205. The push rod 103 is "n"-shaped, and both ends of the push rod 103 are connected to the corresponding mounting bracket 101 via connecting seats 102. The unlocking mechanism is an unlocking pull wire 104 that synchronously controls the unlocking or locking of the connecting seats 102 and the mounting bracket 101 on both sides. The push rod 103 can be made of bent metal tubing and can be welded and fixed to the connecting seat 102 as a whole. Reinforcing ribs can also be provided between the two to ensure the overall robustness of the push rod 103. The unlocking mechanism uses the unlocking pull wire 104, which enables simultaneous unlocking from both sides, making the unlocking operation quick and convenient. See details... Figure 3 As shown, the connecting seat 102 is provided with a pin hole, and the two ends of the unlocking cable 104 are respectively connected to the pin holes of the corresponding connecting seat 102. The pin 104a is also fitted with a spring 104b to keep the pin 104a elastically extending towards the mounting bracket 101. The mounting bracket 101 has a locking hole 101d that cooperates with the pin 104a. When the push rod 103 is in the extended state, the pin 104a is located in the locking hole 101d to lock the push rod 103. When the unlocking cable 104 is pulled, the pins 104a on the left and right sides simultaneously exit from the corresponding locking holes 101d to unlock the push rod 103. There is a certain eccentricity between the pin hole and the shaft hole 102a. During the rotation of the push rod 103, the pin hole on the connecting seat 102 also rotates around the axis of the shaft hole 102a, causing the latch 104a to make a circular motion relative to the mounting bracket 101. When the push rod 103 is in the unfolded state, the head of the latch 104a is just inserted into the lock hole 101d, thus fixing the push rod 103. The unlocking cable 104 has a certain degree of flexibility and is in an elongated state under the action of the springs 104b on both sides. When the unlocking cable 104 is pulled, it drives the latches 104a on both sides to move axially, causing the heads of the latches 104a to disengage from the lock hole 101d. At this time, the springs 104b are compressed, and the push rod 103 is in the unlocked state, which can be rotated and folded. The above-described latch structure is simple and compact, with reliable locking and easy and convenient unlocking. Figure 1 and Figure 2 The diagram shows the push rod 103 in the extended state. Figure 4 and Figure 5 The diagram shows the push rod 103 in a folded state.

[0051] Furthermore, in this embodiment, a reinforcing crossbar 103a is provided at one end of the push rod 103 near the connecting seat 102. The reinforcing crossbar 103a can be a tube welded to the push rod 103. There is a distance between the reinforcing crossbar 103a and the unlocking pull line 104 that allows one hand to grasp both the reinforcing crossbar 103a and the unlocking pull line 104 at the same time. For example, the distance between the reinforcing crossbar 103a and the unlocking pull line 104 is 8 to 10 cm. One hand can grasp both the reinforcing crossbar 103a and the unlocking pull line 104 at the same time. By using the reinforcing crossbar 103a to grasp and pull the unlocking pull line 104, the push rod 103 can be unlocked and folded easily and conveniently.

[0052] [Example 2]

[0053] This embodiment discloses an electric wheelchair. The electric wheelchair 200 has the folding push frame assembly 100 of Embodiment 1 above. By integrating the folding push frame assembly 100 onto the electric wheelchair 200, the pushing function is retained on the electric wheelchair 200, and it can be folded together when the wheelchair is folded. After folding, it occupies little space and is easy to carry.

[0054] like Figure 1 , Figure 4 and Figure 6 As shown, an electric wheelchair of this embodiment includes a chassis 201, front wheels 202, rear wheels 203, a lifting and folding mechanism 204, a seat 205, and a backrest 206. The front wheels 202 are omnidirectional wheels and are installed at the front of the chassis 201. The rear wheels 203 are drive wheels and are installed at the rear of the chassis 201. The seat 205 is mounted on the chassis 201 via the lifting and folding mechanism 204. The backrest 206 is hinged to the rear side of the seat 205. The aforementioned electric wheelchair folding push frame assembly 100 is also installed on the seat 205. In addition, foldable armrests 207 are respectively installed on the left and right sides of the seat 205.

[0055] The main structural principle of this electric wheelchair can be found in Chinese Patent Publication No. CN221998225U, entitled "A Foldable Electric Wheelchair" (Patent No. 202323583079.9), with the following differences:

[0056] Reference Figure 7 and Figure 8As shown, the lifting and folding mechanism 204 includes a first support arm 204-1, a second support arm 204-2, and a lifting electric push rod 204-3. The lower ends of the first support arm 204-1 and the second support arm 204-2 are respectively hinged to the lower support seat 201a on the chassis 201. The upper ends of the first support arm 204-1 and the second support arm 204-2 are respectively hinged to the upper connecting seat 205a at the bottom of the seat plate 205, so that the first support arm 204-1, the lower support seat 201a, the second support arm 204-2, and the upper connecting seat 205a are sequentially connected to form a four-bar linkage. The lower end of the lifting electric push rod 204-3 is hinged to the chassis 201, and the upper end is hinged to the upper connecting seat 205a. Specifically, the upper end of the first support arm 204-1 is hinged to the upper connecting seat 205a at the bottom of the seat plate 205 at hinge point A, and the lower end is hinged to the lower support seat 201a at hinge point B. The lower end of the second support arm 204-2 is hinged to the lower support seat 201a at hinge point C, and the upper end is hinged to the upper connecting seat 205a at the bottom of the seat plate 205 at hinge point D. The first support arm 204-1, the lower support seat 201a, the second support arm 204-2, and the upper connecting seat 205a are sequentially connected to form a four-bar linkage ABCD, ensuring that the seat plate 205 remains horizontally raised and lowered. The lower end of the lifting electric push rod 204-3 is hinged to the traveling chassis 201 at hinge point F, and the upper end of the lifting electric push rod 204-3 is hinged to the upper connecting seat 205a at the bottom of the seat plate 205 at hinge point E, where hinge point E is higher than hinge point D. The wheelchair uses an electric push rod to drive a four-bar linkage for lifting, allowing for convenient adjustment of the seat height while seated in the wheelchair, further improving the electrification level and ease of operation.

[0057] In addition, such as Figure 7 and Figure 8 As shown, in this embodiment, the front end of the walking chassis 201 is also provided with a retractable foot pedal 208. A telescopic electric push rod 209 for driving the retractable movement of the foot pedal 208 is also provided between the walking chassis 201 and the foot pedal 208. One end of the telescopic electric push rod 209 is hinged to the walking chassis 201, and the other end is hinged to the foot pedal 208. By controlling the retractable movement of the telescopic electric push rod 209, the foot pedal 208 can be driven to retract, realizing the electric retractable control of the foot pedal 208 and facilitating the adjustment of the extension length of the foot pedal 208.

[0058] This utility model discloses an electric wheelchair folding pusher assembly and an electric wheelchair. The folding pusher assembly is integrated into the electric wheelchair, allowing the electric wheelchair to retain its pushing function. The pusher is mounted on the seat of the electric wheelchair via a mounting bracket, so that the force is transmitted to the seat during pushing, avoiding pushing the back panel and affecting comfort. At the same time, the pusher can be unlocked or unfolded and locked via an unlocking mechanism. When folded, it occupies little space, and when unfolded, it is firmly and reliably locked. It has the advantages of simple and compact structure and flexible and convenient operation.

[0059] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A folding push-pull frame assembly for an electric wheelchair, characterized in that: include Mounting bracket (101) is fixedly mounted on the seat plate (205) of the electric wheelchair (200); A connecting seat (102) is rotatably mounted on the rear end of a mounting bracket (101); The push rod (103) is fixedly mounted on the connecting seat (102) and can rotate relative to the mounting bracket (101) between the unfolded state and the folded state; The unlocking mechanism, located between the connecting seat (102) and the mounting bracket (101), is used to lock the push rod (103) in the unfolded state and can be unlocked to allow the push rod (103) to rotate and switch to the folded state.

2. The electric wheelchair folding push frame assembly according to claim 1, characterized in that: The mounting bracket (101) has a front connecting plate (101a) for connecting the front end of the base plate (205) at the front end, and a rear connecting plate (101b) for connecting the rear end of the base plate (205) at the rear end. The mounting bracket (101) also has an extension section extending toward the rear side of the base plate (205) at the rear end. The connecting seat (102) is mounted on the extension section of the mounting bracket (101) via a pivot (105).

3. The electric wheelchair folding push frame assembly according to claim 2, characterized in that: The rotating shaft (105) includes a bushing (105a) and a locking bolt (105b). The rear end of the mounting bracket (101) is provided with a connecting hole (101c). The connecting seat (102) is provided with a shaft hole (102a) corresponding to the connecting hole (101c). The bushing (105a) is sequentially inserted into the connecting hole (101c) and the corresponding shaft hole (102a). The locking bolt (105b) is inserted into the bushing (105a) and threadedly connected to the connecting seat (102).

4. The electric wheelchair folding push frame assembly according to claim 1, 2, or 3, characterized in that: The mounting bracket (101) is provided on each of the left and right sides of the base plate (205). The push rod (103) is "n" shaped. The two ends of the push rod (103) are connected to the corresponding mounting bracket (101) through the connecting seat (102). The unlocking mechanism is an unlocking pull line (104) that synchronously controls the unlocking or locking of the connecting seat (102) on the left and right sides and the mounting bracket (101).

5. The electric wheelchair folding push frame assembly according to claim 4, characterized in that: The connecting seat (102) is provided with a pin hole, and the two ends of the unlocking pull cable (104) are respectively connected to a pin (104a) located in the pin hole of the corresponding connecting seat (102). The pin (104a) is also fitted with a spring (104b) for keeping the pin (104a) elastically extended towards the mounting bracket (101). The mounting bracket (101) has a locking hole (101d) that cooperates with the pin (104a). When the push rod (103) is in the unfolded state, the pin (104a) is located in the locking hole (101d) to lock the push rod (103). When the unlocking pull cable (104) is pulled, the pins (104a) on the left and right sides simultaneously exit from the corresponding locking holes (101d) to realize the unlocking rotation of the push rod (103).

6. The electric wheelchair folding push frame assembly according to claim 5, characterized in that: The push rod (103) is also provided with a reinforcing crossbar (103a) at one end near the connecting seat (102). The reinforcing crossbar (103a) and the unlocking cable (104) are at a distance that allows one hand to grasp both the reinforcing crossbar (103a) and the unlocking cable (104) at the same time.

7. An electric wheelchair, comprising a chassis (201), front wheels (202), rear wheels (203), a lifting and folding mechanism (204), a seat (205), and a backrest (206), wherein the front wheels (202) are omnidirectional wheels and are mounted on the front of the chassis (201), the rear wheels (203) are drive wheels and are mounted on the rear of the chassis (201), the seat (205) is mounted on the chassis (201) via the lifting and folding mechanism (204), and the backrest (206) is hinged to the rear side of the seat (205), characterized in that: The seat plate (205) is also equipped with the electric wheelchair folding pusher assembly as described in any one of claims 1 to 6.

8. The electric wheelchair according to claim 7, characterized in that: Foldable armrests (207) are also installed on the left and right sides of the seat plate (205).

9. The electric wheelchair according to claim 7 or 8, characterized in that: The lifting and folding mechanism (204) includes a first support arm (204-1), a second support arm (204-2), and a lifting electric push rod (204-3). The lower ends of the first support arm (204-1) and the second support arm (204-2) are respectively hinged to the lower support seat (201a) on the walking chassis (201). The upper ends of the first support arm (204-1) and the second support arm (204-2) are respectively hinged to the upper connecting seat (205a) at the bottom of the seat plate (205), so that the first support arm (204-1), the lower support seat (201a), the second support arm (204-2), and the upper connecting seat (205a) are connected in sequence to form a four-bar linkage mechanism. The lower end of the lifting electric push rod (204-3) is hinged to the walking chassis (201), and the upper end is hinged to the upper connecting seat (205a).

10. The electric wheelchair according to claim 9, characterized in that: The front end of the walking chassis (201) is also provided with a retractable foot pedal (208), and a retractable electric push rod (209) for driving the foot pedal (208) to retract is provided between the walking chassis (201) and the foot pedal (208).

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