A backrest armrest linkage folding seat and scooter

Abstract

The application relates to the technical field of folding seat and scooter equipment, in particular to a backrest and handrail linkage folding seat and scooter. The folding seat comprises a seat, a backrest, a handrail and a first linkage mechanism. The first linkage mechanism comprises a linkage sleeve and a limiting pin arranged on the handrail. The backrest is in transmission connection with the linkage sleeve. The linkage sleeve is provided with a limiting groove. The limiting pin is located in the limiting groove and can reciprocate within the length range. The backrest rotation can drive the linkage sleeve to rotate, and the limiting pin in the limiting groove can be pushed by the side wall of the limiting groove to drive the handrail to rotate, so that the linkage of the backrest and the handrail is realized. After the handrail is turned to the unfolded position along with the backrest, the handrail can be independently rotated to avoid the side passage and facilitate getting on and off the vehicle. The above-mentioned backrest and handrail linkage folding seat is adopted by the scooter, and the seat and the backrest are also designed in linkage, so that the linkage of the seat lifting, the backrest unfolding and folding and the handrail unfolding and folding can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of folding seat and scooter equipment, in particular to a backrest and armrest linkage folding seat and scooter. BACKGROUND

[0002] The backrest and armrest of the folding seat can be folded when not in use, reducing the volume, facilitating storage and transportation, and being convenient to use, so it is widely used, such as on scooters to meet the needs of the elderly and people with physical disabilities. However, most of the folding seats on the market cannot be linked to the backrest and armrest, and need to be turned separately to unfold and fold, which is not convenient to use. Some folding seats can realize the linkage of the backrest and armrest, but usually use a pull line linkage. This kind of linkage mechanism is not rigidly supported, so the carrying capacity is relatively poor. Moreover, the current linkage mechanism of the backrest and armrest cannot be turned alone when the armrest is turned with the backrest to the unfolded position, so the armrest will block the passage on the side of the seat, which is not convenient for users with mobility problems to get on and off the vehicle from the side. SUMMARY

[0003] In order to overcome the defects in the prior art, one of the tasks of the present application is to provide a backrest and armrest linkage folding seat, which can realize the linkage of the backrest and armrest, and the armrest is supported by a rigid structure, so the carrying capacity is strong, and the armrest can be turned alone when it is turned with the backrest to the unfolded position, so it will not block the passage on the side of the seat, making it easy for users to get on and off the vehicle. The second task of the present application is to provide a scooter using the above-mentioned backrest and armrest linkage folding seat, and the seat and backrest also use linkage design, so as to realize the common linkage of seat lifting, backrest unfolding and folding, and armrest unfolding and folding.

[0004] One of the tasks of the present application is achieved by the following technical scheme:

[0005] A backrest and armrest linkage folding seat, comprising: a seat, on which a fixed shaft protruding to both sides is fixed; a backrest, which is hinged to the seat; two armrests, which are respectively located on both sides of the seat and are rotatably connected with the fixed shaft on the corresponding side, and are respectively connected on both sides of the backrest through a first linkage mechanism; the first linkage mechanism comprises a linkage sleeve and a limiting pin fixed on the corresponding armrest, the linkage sleeve is movably sleeved on the fixed shaft and is rotatably connected with it, the linkage sleeve is drivingly connected with the backrest through a transmission mechanism, so that the backrest can drive the linkage sleeve to rotate, and the linkage sleeve is also provided with a long arc-shaped limiting groove in the circumferential direction, the limiting pin is located in the limiting groove and can move back and forth within the length range, and when the backrest is unfolded relative to the seat, it can drive the linkage sleeve to rotate, thereby pushing the limiting pin through one end of the limiting groove, and further driving the armrest to unfold.

[0006] The backrest handrail linkage folding seat provided by the technical scheme can drive the linkage sleeve to rotate when the backrest rotates from the folding position to the unfolded position, thereby pushing the limiting pin through one end of the limiting slot to drive the handrail to rotate to the unfolded position, at this time, the handrail can be manually rotated backward until the limiting pin abuts against the other end of the limiting slot, at this time, the handrail is located in the avoiding position, which leaves a channel on the side of the seat, thereby facilitating the user to get on or off the vehicle, and the handrail can be freely lowered to the unfolded position after the user gets on or off the vehicle, when the backrest rotates downward from the unfolded position to the folding position, the limiting pin loses the pushing and abutting effect of the limiting slot, and the handrail is automatically rotated to the folding position under the action of gravity, thereby realizing linkage unfolding and folding of the backrest and the handrail; in addition, the handrail is rigidly supported by the abutting of the limiting slot and the limiting pin in the unfolded position, has strong bearing capacity, is safe and reliable, and is not easy to be damaged.

[0007] The technical scheme is further described below:

[0008] In some embodiments, the transmission mechanism comprises a first linkage and a second linkage, one end of the first linkage is fixedly connected to the side wall of the linkage sleeve, the other end of the first linkage protrudes outward and is hingedly connected to one end of the second linkage, the other end of the second linkage is hingedly connected to the backrest, thereby realizing transmission of the backrest and the linkage sleeve.

[0009] In some embodiments, the transmission mechanism further comprises a third linkage, one end of the third linkage is fixedly connected to the backrest, the other end of the third linkage protrudes forward or backward and is hingedly connected to the other end of the second linkage, thereby realizing hinging of the second linkage and the backrest.

[0010] In some embodiments, the rear end of the seat is fixedly provided with a first support frame protruding upward, the lower end of the backrest is fixedly provided with a second support frame protruding forward or backward, and the end portions of the first support frame and the second support frame are hingedly connected, thereby realizing hinging of the backrest and the seat, and the hinge shaft at the hinging point is parallel to the hinge shafts at the hinging points between the second linkage and the third linkage.

[0011] In some embodiments, the root side of the handrail is fixedly connected with a sleeve joint, the sleeve joint is movably sleeved outside the fixed shaft to realize rotary connection, the limiting pin is fixedly arranged on the sleeve joint, and the linkage sleeve is a stepped sleeve structure, one end of the large-diameter linkage sleeve is movably sleeved outside the sleeve joint, and one end of the small-diameter linkage sleeve is movably sleeved outside the fixed shaft.

[0012] In some embodiments, the handrail comprises mutually bent supporting segments and connecting segments, the handrail is rotationally connected with the fixed shaft through the root of the connecting segments, the transmission mechanism is a speed reduction transmission mechanism, when the backrest drives the handrail to rotate, the rotation angular velocity of the backrest is greater than that of the handrail; when the handrail is in the folding position, the connecting segments are flush with the seat; when the handrail is rotated to the unfolded position, the connecting segments are located between the seat and the backrest, and the supporting segments are parallel to the seat; when the handrail is rotated to the avoiding position, the connecting segments are flush with the backrest.

[0013] The second task of the present application is achieved by the following technical solutions:

[0014] A scooter comprises the backrest-handrail linkage folding seat provided in the first task of the present application, and a chassis assembly, a folding support, a second linkage mechanism and a driving mechanism, the chassis assembly comprises a chassis and wheels mounted on the chassis, the seat is connected with the chassis through the folding support, the backrest is linkage connected with the folding support through the second linkage mechanism, and the driving mechanism is used to drive the folding support to unfold or fold, thereby driving the seat to lift through the folding support, and driving the backrest to rotate and unfold or fold through the second linkage mechanism, and driving the handrail to rotate and unfold or fold through the first linkage mechanism.

[0015] The scooter provided in the present application can drive the folding support to unfold or fold through the driving mechanism during use, thereby driving the seat to lift through the folding support, driving the backrest to rotate and unfold or fold through the second linkage mechanism, and driving the handrail to rotate and unfold or fold through the first linkage mechanism, and when the seat is lifted to a proper height and the backrest and the handrail are rotated to the unfolded position, the handrail can also be manually rotated upward to rotate to the avoiding position, so as to leave a channel for getting on and off the seat, thereby facilitating the user to get on and off the seat, and without affecting the linkage of the backrest and the handrail.

[0016] The concept, specific structure and effects of the present application will be further described below in combination with the drawings, so as to fully understand the purpose, features and effects of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of the backrest-handrail linkage folding seat in the rear side view in Example 1;

[0018] Figure 2 is Figure 1 is a partial enlarged view of part A in Example 1;

[0019] Figure 3 is a structural schematic view of the backrest-handrail linkage folding seat in the front side view in Example 1;

[0020] Figure 4This is a schematic diagram of the mobility scooter in Example 2.

[0021] The components include: seat 1, fixed shaft 11, first support frame 12, backrest 2, second support frame 21, armrest 3, support section 31, connecting section 32, sleeve joint 33, first linkage mechanism 4, linkage sleeve 41, limiting groove 411, limiting pin 42, first linkage component 43, second linkage component 44, third linkage component 45, backrest and armrest linkage folding seat 10, chassis assembly 20, chassis 201, wheel 202, folding bracket 30, second linkage mechanism 40, and drive mechanism 50. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can be directly connected or indirectly connected through intermediate elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] Example 1:

[0024] like Figures 1-3 As shown, a backrest and armrest linked folding seat 10 includes:

[0025] Seat 1, with a fixed shaft 11 extending to both sides at its rear end;

[0026] Backrest 2, which is hinged to seat 1;

[0027] There are two armrests 3, located on both sides of the seat 1 and vertically rotatably connected to the fixed shaft 11 on the corresponding side, and connected to both sides of the backrest 2 through the first linkage mechanism.

[0028] The first linkage mechanism 4 includes a linkage sleeve 41 and a limiting pin 42 fixed on the corresponding armrest 3. The linkage sleeve 41 is movably sleeved on the fixed shaft 11 and rotatably connected to it. The linkage sleeve 41 and the backrest 2 are connected by a transmission mechanism so that the backrest 2 can drive the linkage sleeve 41 to rotate. The linkage sleeve 41 is also provided with a long arc-shaped limiting groove 411 in the circumference. The length of the limiting groove 411 is greater than the outer diameter of the limiting pin 42. The limiting pin 42 is located in the limiting groove 411 and can reciprocate within its length range. When the backrest 2 rotates and unfolds relative to the seat 1, it can drive the linkage sleeve 41 to rotate, thereby pushing the limiting pin 42 through one end side wall of the limiting groove 411, and thus driving the armrest 3 to rotate and unfold.

[0029] The backrest armrest linkage folding seat 10 provided by the embodiment can drive the linkage sleeve 41 to rotate when the backrest 2 rotates from the folding position to the unfolded position during use, thereby pushing the limiting pin 42 through one end of the limiting slot 411 to drive the armrest 3 to rotate to the unfolded position at the same time. Since the length of the limiting slot 11 is greater than the outer diameter of the limiting pin 42, the armrest 3 can be manually rotated backward alone at this time until the limiting pin 42 abuts against the other end of the limiting slot 411, at which time the armrest 3 is in the avoiding position and leaves a channel on the side of the seat 1, thereby facilitating the user to get on or off the vehicle. After the user gets on or off the vehicle, the armrest 3 can be freely lowered to the unfolded position. When the backrest 2 rotates downward from the unfolded position to the folding position, the limiting pin 42 loses the pushing and abutting effect of the limiting slot 411, and the armrest 3 will automatically rotate to the folding position under the action of gravity at the same time, thereby realizing the linkage unfolding and folding of the backrest 2 and the armrest 3. Moreover, the armrest 3 is rigidly supported by the abutting of the limiting slot 411 and the limiting pin 42 when the armrest 3 is in the unfolded position, and has strong carrying capacity, is safe and reliable, and is not easy to be damaged. It should be noted that the surfaces of the seat 1, the backrest 2 and the armrest 3 can be provided with soft pads, which can be soft pads made of sponge, rubber or other materials.

[0030] In some embodiments, the transmission mechanism includes a first linkage 43, a second linkage 44 and a third linkage 45. One end of the first linkage 43 is fixedly connected to the side wall of the linkage sleeve 41, the other end of the first linkage 43 protrudes outward and is hingedly connected to one end of the second linkage 44. One end of the third linkage 45 is fixedly connected to the backrest 2, and the other end of the third linkage 45 protrudes forward or backward and is hingedly connected to the other end of the second linkage 44, thereby realizing the transmission of the backrest 2 and the linkage sleeve 41. It should be noted that the first linkage 43, the second linkage 44 and the third linkage 45 are all rigid objects with supporting effect, and their shapes are not limited.

[0031] In some embodiments, the rear end of the seat 1 is fixedly provided with a first support frame 12 protruding upward, and the lower end of the backrest 2 is fixedly provided with a second support frame 21 protruding forward or backward. The end portions of the first support frame 12 and the second support frame 21 are hingedly connected, thereby realizing the hinging of the backrest 2 and the seat 1, and the hinge shaft at the hinging point is parallel to the hinge shaft between the hinging points of the second linkage 44 and the third linkage 45. This design enables the backrest 2 to drive the second linkage 44 to deflect when the backrest 2 rotates, and enables the backrest 2 to be hingedly connected above the seat 1. The folding position of the backrest 2 is flat on the seat 1, and the space occupied is smaller.

[0032] In some embodiments, a sleeve joint 33 is fixedly connected to the base side of the handrail 3. The sleeve joint 33 is movably fitted onto the outside of the fixed shaft 11 to achieve a rotatable connection. The limiting pin 42 is fixedly mounted on the sleeve joint 33. The linkage sleeve 41 has a stepped sleeve structure, with one end of the linkage sleeve 41 movably fitted onto the outside of the sleeve joint 33 and the other end of the linkage sleeve 41 movably fitted onto the outside of the fixed shaft 11. This design is simple and facilitates the coaxial rotatable connection of the sleeve joint 33, the linkage sleeve 41, and the fixed shaft 11.

[0033] In some embodiments, the armrest 3 includes a support section 31 and a connecting section 32 that bend together. The armrest 3 is rotatably connected to the fixed shaft 11 through the root of the connecting section 32. The transmission mechanism is a reduction transmission mechanism. When the backrest 2 drives the armrest 3 to rotate, the rotational angular velocity of the backrest 2 is greater than that of the armrest 3. When the armrest 3 is in the folded position, the connecting section 32 is flush with the seat 1. When the armrest 3 is rotated to the unfolded position, the connecting section 32 is located between the angle between the seat 1 and the backrest 2, and the support section 31 is parallel to the seat 1. When the armrest 3 is rotated to the clearance position, the connecting section 32 is flush with the backrest 2. Taking the transmission mechanism in the above embodiments as an example, by designing the lengths of the first linkage 43, the second linkage 44, and the third linkage 45 through mathematical calculations, rigid reduction transmission between the backrest 2 and the armrest 3 can be achieved. The armrests designed are easy to use. When the armrests are in the avoidance position, they will not affect the space behind the backrest. Moreover, the rigid linkage between the backrest and the armrests can still be achieved by using the transmission mechanism in the above embodiment.

[0034] Example 2:

[0035] like Figure 4 As shown, a mobility scooter includes a backrest and armrest linked folding seat 10 as in Embodiment 1, a chassis assembly 20, a folding bracket 30, a second linkage mechanism 40, and a drive mechanism 50. The chassis assembly 20 includes a chassis 201 and wheels 202 mounted on the chassis 201. The seat 1 is connected to the chassis 201 via the folding bracket 30, and the backrest 2 is linked to the folding bracket 30 via the second linkage mechanism 40. The drive mechanism 50 is used to drive the folding bracket 30 to unfold or fold, thereby driving the seat 1 to rise and fall through the folding bracket 30. At the same time, the second linkage mechanism 40 drives the backrest 2 to rotate and unfold or fold, and the first linkage mechanism 4 drives the armrest 3 to rotate and unfold or fold.

[0036] The scooter provided by the application drives the folding support 30 to unfold or fold through the driving mechanism 50 during use, and then drives the seat 1 to lift through the folding support 30, simultaneously drives the backrest 2 to rotate and unfold or fold through the second linkage mechanism 40, and simultaneously drives the handrail 3 to rotate and unfold or fold through the first linkage mechanism 4, and when the seat 1 is lifted to a suitable height and the backrest 2 and the handrail 3 are all rotated to the unfolded position, the handrail 3 can be manually rotated upward to rotate to a avoiding position, and the up-and-down vehicle passage on the side of the seat 1 is opened to facilitate the user to get on and off the vehicle, and does not affect the linkage of the backrest 2 and the handrail 3.

[0037] The above description is merely the preferred embodiment of the present application and the explanation of the technical principles applied. It should be understood by those skilled in the art that the inventive scope involved in the present application is not limited to the technical solutions formed by the specific combination of the technical features described above, and should also cover other technical solutions formed by the arbitrary combination of the technical features described above or their equivalent features without departing from the inventive concept. For example, the technical solutions formed by the mutual replacement of the above features and the technical features disclosed in the present application (but not limited to) with similar functions.

Claims

1. A folding chair with linked backrest and armrests, characterized in that, include: The seat has fixed shafts that protrude to both sides. The backrest is hinged to the seat; There are two armrests, located on both sides of the seat and rotatably connected to the fixed shaft on the corresponding side, and connected to both sides of the backrest through the first linkage mechanism. The first linkage mechanism includes a linkage sleeve and a limiting pin fixed to the corresponding armrest. The linkage sleeve is movably sleeved on and rotatably connected to a fixed shaft. The linkage sleeve and the backrest are connected by a transmission mechanism so that the backrest can drive the linkage sleeve to rotate. The linkage sleeve is also provided with a long arc-shaped limiting groove in its circumference. The limiting pin is located in the long arc-shaped limiting groove and can reciprocate within its length range. When the backrest rotates and unfolds relative to the seat, it can drive the linkage sleeve to rotate, thereby pushing the limiting pin through one end sidewall of the long arc-shaped limiting groove, and thus driving the armrest to rotate and unfold. The transmission mechanism includes a first linkage member and a second linkage member. One end of the first linkage member is fixedly connected to the sidewall of the linkage sleeve, and the other end protrudes outward and is hinged to one end of the second linkage member. The other end of the second linkage member is hinged to the backrest, thereby realizing the transmission between the backrest and the linkage sleeve. A sleeve joint is fixedly connected to the side of the base of the handrail. The sleeve joint is movably sleeved on the outside of the fixed shaft to achieve a rotatable connection. The limiting pin is fixedly set on the sleeve joint. The linkage sleeve has a stepped sleeve structure. The larger diameter end of the linkage sleeve is movably sleeved on the outside of the sleeve joint, and the smaller diameter end is movably sleeved on the outside of the fixed shaft.

2. The backrest and armrest linkage folding seat according to claim 1, characterized in that, The transmission mechanism also includes a third linkage member, one end of which is fixedly connected to the backrest, and the other end protrudes forward or backward and is hinged to the other end of the second linkage member, thereby realizing the hinge connection between the second linkage member and the backrest.

3. The backrest and armrest linkage folding seat according to claim 2, characterized in that, The rear end of the seat is fixedly provided with an upwardly protruding first support frame, and the lower end of the backrest is fixedly provided with a forward or backward protruding second support frame. The ends of the first support frame and the second support frame are hinged together, thereby realizing the hinge connection between the backrest and the seat. The hinge axis at the hinge point is parallel to the hinge axis at the hinge point between the second linkage member and the third linkage member.

4. The backrest and armrest linkage folding seat according to claim 1, characterized in that, The armrest includes mutually bent support sections and connecting sections. The armrest is rotatably connected to the fixed shaft through the root of the connecting section. The transmission mechanism is a reduction transmission mechanism. When the backrest drives the armrest to rotate, the rotational angular velocity of the backrest is greater than that of the armrest. When the armrest is in the folded position, the connecting section is flush with the seat. When the armrest is rotated to the unfolded position, the connecting section is located between the angle between the seat and the backrest, and the support section is parallel to the seat. When the armrest is rotated to the avoidance position, the connecting section is flush with the backrest.

5. A mobility scooter, characterized in that, The invention includes a backrest and armrest linkage folding seat as described in any one of claims 1-4, as well as a chassis assembly, a folding bracket, a second linkage mechanism, and a drive mechanism. The chassis assembly includes a chassis and wheels mounted on the chassis. The seat is connected to the chassis via the folding bracket, and the backrest is linked to the folding bracket via the second linkage mechanism. The drive mechanism is used to drive the folding bracket to unfold or fold, thereby driving the seat to rise and fall via the folding bracket. At the same time, the second linkage mechanism drives the backrest to rotate and unfold or fold, and the first linkage mechanism drives the armrest to rotate and unfold or fold.

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