Backrest righting mechanism for a scooter seat

Abstract

The utility model discloses a chair back righting mechanism for scooter seat, belongs to chair back righting field, the utility model discloses a front backrest plate is installed in the back seat cover, and two clamping ribs are symmetrically and slidingly installed in the side of front backrest plate, the horizontal slide hole is symmetrically set up in the side of front backrest plate, and the horizontal slide hole is slidingly installed L type sliding block, and the rear extension link of clamping rib is hinged with the cross block end of L type sliding block, and the vertical rod of two L type sliding blocks is respectively with the positive and negative thread section of two -way screw and is threadedly connected. The utility model drives two L type sliding blocks and two clamping ribs to move oppositely or oppositely under the drive of first drive equipment, and then the clamping rib interval is adjusted to adapt to the user of different figure, and simultaneously under the drive of second drive equipment, horizontal top rod moves back and forth along the length direction of the side rod of U type support rod, and then two swing rods are driven to rotate oppositely or oppositely, and then the angle between clamping rib and the side of front backrest plate is adjusted, and the user of different obesity degree is adapted, and the use experience is good.

Description

Technical Field

[0001] This utility model relates to the field of chair back technology, specifically a chair back straightening mechanism for a mobility scooter seat. Background Technology

[0002] As mobility scooters become widely used by people of all ages, the demands on their seats are also gradually increasing. For example, some drivers add fans for comfort, while others add massage functions for relaxation. However, few mobility scooters address the health and posture of the driver. People often fail to maintain good posture while driving, leading to potential lower back health problems; especially during bumpy rides, the posture is more prone to tilting. Existing patents feature two ribs on the front of the seat back to support the driver's lower back, preventing tilting and maintaining a good posture. While these ribs are effective, their spacing and angle are not adjustable, making them unsuitable for drivers of different heights. To address these issues, this invention provides a seat back support mechanism for mobility scooter seats. Summary of the Invention

[0003] To address the aforementioned technical deficiencies, the purpose of this utility model is to provide a backrest adjustment mechanism for a mobility scooter seat. Driven by a first driving device, a bidirectional screw rotates in both directions, thereby driving two L-shaped sliders and two clamping ribs to move relative to or away from each other, thus adjusting the clamping rib spacing to accommodate users of different body sizes. Simultaneously, driven by a second driving device, a horizontal top rod moves back and forth along the length of the side rod of the U-shaped support rod, thereby driving two swing arms to rotate relative to or away from each other, thus adjusting the angle between the clamping ribs and the side of the front backrest to accommodate users with different degrees of obesity. This solves the technical problems mentioned in the background art.

[0004] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: This utility model provides a backrest support mechanism for a mobility scooter seat, comprising: a front backrest plate installed inside the rear seat cover; two symmetrically arranged ribs slidably mounted on the sides of the front backrest plate; horizontal sliding holes are symmetrically opened on both sides of the sides of the front backrest plate; L-shaped sliders are slidably mounted in the horizontal sliding holes; the rear extension rods of the ribs are hinged to the ends of the horizontal blocks of the L-shaped sliders; the vertical rods of the two L-shaped sliders are respectively threaded to the forward and reverse threaded sections of a bidirectional screw; under the drive of a first driving device... The bidirectional screw rotates in both directions, thereby driving the two L-shaped sliders and the two clamping ribs to move relative to or away from each other; a U-shaped support rod is installed on the rear side of the front plate, and a horizontal top rod is slidably installed between the two sides of the U-shaped support rod, with limiting sliding holes symmetrically opened on both sides of the horizontal top rod; the end of the rear extension rod is integrally connected to a swing rod, and the end of the swing rod is slidably installed between the upper and lower side walls of the limiting sliding hole; under the drive of the second driving device, the horizontal top rod moves back and forth along the length direction of the side rod of the U-shaped support rod, thereby driving the two swing rods to rotate relative to or away from each other.

[0005] Preferably, a first strip-shaped limiting groove is symmetrically formed between the upper and lower side walls of the limiting sliding hole. A vertical shaft is rotatably mounted at the end of the swing rod, and the vertical shaft is rolled between the two side walls of the first strip-shaped limiting groove. The end of the limiting sliding hole away from the side rod of the U-shaped support is connected to the end of the swing rod by a spring. Under the action of the spring tension, the ends of the two swing rods maintain a tendency to move relative to each other along the length of the horizontal push rod, which is convenient and practical. Under the action of the spring tension, when the horizontal push rod moves closer to the front plate, it drives the ends of the two swing rods to move relative to each other. The movement drives the two clamping ribs to open relative to each other; when the horizontal top rod moves away from the front support plate, it drives the ends of the two swing rods to move in opposite directions, thereby driving the two clamping ribs to close relative to each other; under the action of the two spring tensions, the horizontal top rod moves forward or backward, driving the two swing rods to move relative to each other or in opposite directions, thereby driving the two clamping ribs to open relative to each other and then close relative to each other, which is convenient and practical; when the rear side of the horizontal top rod is attached to the inner side of the bottom rod of the U-shaped support rod, the swing rod is perpendicular to the horizontal top rod, and at the same time the clamping ribs are perpendicular to the front support plate.

[0006] Preferably, L-shaped limiting holes are symmetrically opened on both sides of the U-shaped support rod, penetrating the bottom rod of the U-shaped support rod, providing space for the swing rod to move; second strip-shaped limiting grooves are symmetrically opened on the upper and lower side walls of one of the L-shaped limiting holes, and second limiting strips are symmetrically provided on the upper and lower side surfaces of the end of the horizontal top rod, and the second limiting strips are slidably installed in the second strip-shaped limiting grooves; so as to ensure that the horizontal top rod slides stably along the length direction of the second limiting strip, which is convenient and practical.

[0007] Preferably, the second driving device includes a second servo motor, which is fixedly installed on the outer side of the bottom rod of the U-shaped support rod. The output shaft of the second servo motor is fixedly connected to a threaded rod, and the threaded rod is threadedly connected to the center position of the horizontal push rod. The second servo motor provides stable power for the movement of the horizontal push rod, which is convenient and practical.

[0008] Preferably, the horizontal block of the L-shaped slider has a first limiting strip on its upper and lower sides, and a third strip-shaped limiting groove is symmetrically opened between the upper and lower side walls of the horizontal sliding hole. The first limiting strip is slidably installed in the third strip-shaped limiting groove to ensure that the horizontal block of the L-shaped slider slides stably in the horizontal sliding hole. The two ends of the bidirectional screw are rotatably installed on the inner side of the side rod of the U-shaped support rod. The upper surface of the vertical block of the L-shaped slider is integrally connected to the upper protrusion. The forward and reverse threaded sections of the bidirectional screw are respectively threaded to the two upper protrusions. The driven gear is coaxially fixedly installed at the center of the bidirectional screw. The bidirectional screw drives the two L-shaped sliders to move relative to or in opposite directions, which is convenient and practical. The first driving device includes a first servo motor, which is fixedly installed on the side of one plate of the L-shaped plate. The other plate of the L-shaped plate is fixedly installed on the rear side of the front support plate by screws. The output end of the first servo motor is coaxially fixedly connected to the driving gear. The driving gear meshes with the driven gear. The first servo motor provides stable power for the rotation of the bidirectional screw, which is convenient and practical.

[0009] Preferably, the rear extension rod is integrally connected to the center of the narrow part of the clamping rib, and the width of the clamping rib gradually increases along the direction away from the front backrest, ensuring clamping assistance to correct sitting posture while saving materials.

[0010] The beneficial effects of this utility model are as follows: This invention features two ribs on the front side of the backrest, enabling users to maintain a good sitting posture and preventing scoliosis caused by poor posture, thus ensuring healthy driving. Furthermore, driven by a first drive device, a bidirectional screw rotates in both directions, thereby driving two L-shaped sliders and two ribs to move relative to or away from each other, adjusting the rib spacing to accommodate users of different body types. Simultaneously, driven by a second drive device, a horizontal push rod moves back and forth along the length of the side rod of the U-shaped support, driving two swing arms to rotate relative to or away from each other, adjusting the angle between the ribs and the side of the backrest to accommodate users with varying degrees of obesity, providing a better user experience.

[0011] This invention utilizes the tension of two springs to drive two swing arms to move relative to or away from each other by moving a horizontal push rod forward or backward, thereby driving the two clamping ribs to open and close relative to each other, making it convenient and practical. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a structural schematic diagram of a seat back straightening mechanism for a mobility scooter seat provided in an embodiment of the present invention.

[0014] Figure 2 for Figure 1 A schematic diagram of the structure without the rear seat cover installed.

[0015] Figure 3 for Figure 2 A magnified view of A in the middle.

[0016] Figure 4 for Figure 2 A schematic diagram of the structure before the front support plate is installed.

[0017] Figure 5 for Figure 4 A schematic diagram of the structure at the forward viewing angle.

[0018] Figure 6 for Figure 5 A magnified view of B in the middle.

[0019] Figure 7 for Figure 4 A schematic diagram of the structure without U-shaped struts installed.

[0020] Figure 8 for Figure 7 A magnified view of C.

[0021] Figure 9 for Figure 7 A schematic diagram of the structure without the horizontal support rod installed.

[0022] Figure 10 for Figure 9 A magnified view of D.

[0023] Figure 11 for Figure 7 A schematic diagram of the structure after the ends of the two pendulum rods move relative to each other along the horizontal top rod.

[0024] Figure 12 for Figure 11 A magnified view of E in the middle.

[0025] Explanation of reference numerals in the attached drawings: 1-Front support plate, 11-Horizontal sliding hole, 111-Third strip-shaped limiting groove, 2-Rear seat cover, 3-Clamping rib, 31-Rear extension rod, 32-Swing rod, 321-Vertical shaft, 4-L-shaped slider, 41-First limiting strip, 42-Upper protrusion, 5-Bidirectional screw, 51-Driven gear, 52-First servo motor, 521-L-shaped plate, 53-Drive gear, 6-U-shaped support rod, 61-L-shaped limiting hole, 611-Second strip-shaped limiting groove, 7-Horizontal top rod, 71-Limiting sliding hole, 711-First strip-shaped limiting groove, 72-Spring, 73-Second limiting strip, 74-Second servo motor, 75-Threaded rod. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0027] like Figures 1 to 12 As shown, this embodiment provides a backrest support mechanism for a mobility scooter seat, including: a front backrest plate 1 installed inside the rear seat cover 2, and two symmetrically mounted and slidably installed on the sides of the front backrest plate 1. In fact, the rear seat cover 2 and the front backrest plate 1 form an installation cavity, in which the first drive device, the second drive device, and the U-shaped support rod 6, etc., described later, are all located to ensure aesthetics. Horizontal sliding holes 11 are symmetrically opened on both sides of the front backrest plate 1, and L-shaped sliders 4 are slidably installed within the horizontal sliding holes 11. The rear extension rods 31 of the ribs 3 are hinged to the ends of the cross blocks of the L-shaped sliders 4.

[0028] The vertical rods of the two L-shaped sliders 4 are respectively threaded to the forward and reverse threaded sections of the bidirectional screw 5. Under the drive of the first driving device, the bidirectional screw 5 rotates in both directions, thereby driving the two L-shaped sliders 4 and the two clamping ribs 3 to move relative to or away from each other, thus adjusting the distance between the clamping ribs 3 to accommodate users of different body sizes; allowing users to maintain a good sitting posture, avoiding scoliosis caused by poor posture, and ensuring healthy driving. A U-shaped support rod 6 is installed on the rear side of the front backrest 1, and a horizontal top rod 7 is slidably installed between the two sides of the U-shaped support rod 6. Limiting sliding holes 71 are symmetrically opened on both sides of the horizontal top rod 7; the end of the rear extension rod 31 is integrally connected to the swing rod 32, and the end of the swing rod 32 is slidably installed between the upper and lower side walls of the limiting sliding hole 71; under the drive of the second driving device, the horizontal top rod 7 moves back and forth along the length of the side rod of the U-shaped support rod 6, thereby driving the two swing rods 32 to rotate relative to or away from each other, thus adjusting the angle between the clamping ribs 3 and the side of the front backrest 1, accommodating users of different degrees of obesity, and providing a better user experience.

[0029] For further details, please refer to Figure 2 , Figure 3 as well as Figures 5 to 8As shown, the first strip-shaped limiting groove 711 is symmetrically opened between the upper and lower side walls of the limiting sliding hole 71. The vertical shaft 321 is rotatably installed at the end of the swing rod 32. The vertical shaft 321 is rolled between the two side walls of the first strip-shaped limiting groove 711. The end of the limiting sliding hole 71 away from the side rod of the U-shaped support rod 6 is connected to the end of the swing rod 32 through the spring 72. Under the action of the spring 72, the ends of the two swing rods 32 maintain the tendency to move relative to each other along the length direction of the horizontal top rod 7, which is convenient and practical. When the rear side of the horizontal top rod 7 is attached to the inner side of the bottom rod of the U-shaped support rod 6, the swing rod 32 is perpendicular to the horizontal top rod 7, and the clamping rib 3 is perpendicular to the front support plate 1. Under the action of the spring 72, when the horizontal top rod 7 moves closer to the front support plate 1, it drives the ends of the two swing rods 32 to move relative to each other, thereby driving the two clamping ribs 3 to open relative to each other. When the horizontal top rod 7 moves away from the front support plate 1, it drives the ends of the two swing rods 32 to move away from each other, thereby driving the two clamping ribs 3 to close relative to each other. Under the action of the two springs 72, by moving the horizontal top rod 7 forward or backward, it drives the two swing rods 32 to move relative to each other or away from each other, thereby driving the two clamping ribs 3 to open relative to each other and then close relative to each other, which is convenient and practical.

[0030] For further details, please refer to Figure 3 , Figure 4 as well as Figure 8 As shown, L-shaped limiting holes 61 are symmetrically opened on both sides of the U-shaped support rod 6, penetrating the bottom rod of the U-shaped support rod 6, providing space for the movement of the swing rod 32; a second strip-shaped limiting groove 611 is symmetrically opened on the upper and lower side walls of one of the L-shaped limiting holes 61, and a second limiting strip 73 is symmetrically provided on the upper and lower side surfaces of the end of the horizontal top rod 7. The second limiting strip 73 is slidably installed in the second strip-shaped limiting groove 611 to ensure that the horizontal top rod 7 slides stably along the length direction of the second limiting strip 73, which is convenient and practical.

[0031] For further details, please refer to Figure 4 , Figure 5 as well as Figure 7 As shown, the second driving device includes a second servo motor 74, which is fixedly installed on the outer side of the bottom rod of the U-shaped support rod 6. The output shaft of the second servo motor 74 is fixedly connected to the threaded rod 75, and the output shaft of the second servo motor 74 is rotatably connected to the bottom rod of the U-shaped support rod 6. The threaded rod 75 is threadedly connected to the center position of the horizontal push rod 7. The second servo motor 74 provides stable power for the movement of the horizontal push rod 7, which is convenient and practical.

[0032] For further details, please refer to Figures 10 to 12As shown, the horizontal block of the L-shaped slider 4 has a first limiting strip 41 facing the upper and lower sides. A third strip-shaped limiting groove 111 is symmetrically opened between the upper and lower side walls of the horizontal sliding hole 11. The first limiting strip 41 is slidably installed in the third strip-shaped limiting groove 111 to ensure that the horizontal block of the L-shaped slider 4 slides stably in the horizontal sliding hole 11. The two ends of the bidirectional screw 5 are rotatably installed on the inner side of the side rod of the U-shaped support rod 6. The upper surface of the vertical block of the L-shaped slider 4 is integrally connected to the upper protrusion 42. The forward and reverse threaded sections of the bidirectional screw 5 are respectively threaded to the two upper protrusions 42. The driven gear 51 is coaxially fixedly installed at the center of the bidirectional screw 5. The two L-shaped sliders 4 are driven to move relative to or in opposite directions by the bidirectional screw 5, which is convenient and practical. The first driving device includes a first servo motor 52, which is fixedly installed on the side of one plate of the L-shaped plate 521. The other plate of the L-shaped plate 521 is fixedly installed on the rear side of the front support plate 1 by screws. The output end of the first servo motor 52 is coaxially fixedly connected to the drive gear 53, and the drive gear 53 is meshed with the driven gear 51. The first servo motor 52 provides stable power for the rotation of the bidirectional screw 5, which is convenient and practical.

[0033] For further details, please refer to Figure 9 and Figure 11 As shown, the rear extension rod 31 is integrally connected to the center of the narrow part of the clamping rib 3, and the width of the clamping rib 3 gradually increases along the direction away from the front backrest 1; ensuring clamping assistance to correct sitting posture while saving materials.

[0034] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A backrest support mechanism for a mobility scooter seat, characterized in that, include: A front support plate (1) installed inside the rear seat cover (2), and two ribs (3) symmetrically and slidably installed on the side of the front support plate (1); The front support plate (1) has symmetrical horizontal sliding holes (11) on both sides. An L-shaped slider (4) is slidably installed in the horizontal sliding holes (11). The rear extension rod (31) of the clamping rib (3) is hinged to the end of the horizontal block of the L-shaped slider (4). The vertical rods of the two L-shaped sliders (4) are respectively threaded to the forward and reverse threaded sections of the bidirectional screw (5); under the drive of the first driving device, the bidirectional screw (5) rotates in the forward and reverse directions, thereby driving the two L-shaped sliders (4) and the two clamping ribs (3) to move relative to or away from each other. A U-shaped support rod (6) is installed on the rear side of the front support plate (1). A horizontal top rod (7) is slidably installed between the two sides of the U-shaped support rod (6). A limiting sliding hole (71) is symmetrically opened on both sides of the horizontal top rod (7). The end of the rear extension rod (31) is integrally connected to the swing rod (32). The end of the swing rod (32) is slidably installed between the upper and lower side walls of the limiting sliding hole (71). Under the drive of the second driving device, the horizontal top rod (7) moves back and forth along the length direction of the side rod of the U-shaped support rod (6), thereby driving the two swing rods (32) to rotate relative to each other or in opposite directions.

2. The backrest support mechanism for a mobility scooter seat as described in claim 1, characterized in that, The limiting sliding hole (71) has a first strip-shaped limiting groove (711) symmetrically opened between the upper and lower side walls. The vertical shaft (321) is rotatably installed at the end of the swing rod (32). The vertical shaft (321) is rolled between the two side walls of the first strip-shaped limiting groove (711). The end of the limiting sliding hole (71) away from the side rod of the U-shaped support rod (6) is connected to the end of the swing rod (32) through a spring (72). Under the tension of the spring (72), when the horizontal push rod (7) moves closer to the front plate (1), it drives the ends of the two swing rods (32) to move relative to each other, thereby driving the two clamping ribs (3) to open relative to each other; when the horizontal push rod (7) moves away from the front plate (1), it drives the ends of the two swing rods (32) to move away from each other, thereby driving the two clamping ribs (3) to close relative to each other; When the rear side of the horizontal top rod (7) is attached to the inner side of the bottom rod of the U-shaped support rod (6), the swing rod (32) is perpendicular to the horizontal top rod (7), and the clamping rib (3) is perpendicular to the front support plate (1).

3. The backrest support mechanism for a mobility scooter seat as described in claim 2, characterized in that, The U-shaped support rod (6) has symmetrical L-shaped limiting holes (61) that pass through its side rods on both sides; the upper and lower side walls of one of the L-shaped limiting holes (61) have symmetrical second strip-shaped limiting grooves (611); the upper and lower side surfaces of the end of the horizontal top rod (7) are symmetrically provided with second limiting strips (73), and the second limiting strips (73) are slidably installed in the second strip-shaped limiting grooves (611).

4. The backrest support mechanism for a mobility scooter seat as described in claim 3, characterized in that, The second drive device includes a second servo motor (74), which is fixedly installed on the outer side of the bottom rod of the U-shaped support rod (6). The output shaft of the second servo motor (74) is fixedly connected to the threaded rod (75), and the threaded rod (75) is threadedly connected to the center position of the horizontal top rod (7).

5. The backrest support mechanism for a mobility scooter seat as described in claim 1 or 4, characterized in that, The L-shaped slider (4) has a first limiting strip (41) on its upper and lower sides facing each other. The horizontal sliding hole (11) has a third strip-shaped limiting groove (111) symmetrically opened between its upper and lower side walls. The first limiting strip (41) is correspondingly slidably installed in the third strip-shaped limiting groove (111). The two ends of the bidirectional screw (5) are rotatably mounted on the inner side of the side rod of the U-shaped support rod (6). The upper surface of the vertical block of the L-shaped slider (4) is integrally connected to the upper protrusion (42). The forward and reverse threaded sections of the bidirectional screw (5) are respectively threaded to the two upper protrusions (42). The driven gear (51) is coaxially fixedly mounted at the center position of the bidirectional screw (5). The first driving device includes a first servo motor (52), which is fixedly installed on the side of one plate of the L-shaped plate (521). The other plate of the L-shaped plate (521) is fixedly installed on the rear side of the front support plate (1) by screws. The output end of the first servo motor (52) is coaxially fixedly connected to the drive gear (53), and the drive gear (53) meshes with the driven gear (51).

6. The backrest support mechanism for a mobility scooter seat as described in claim 1, characterized in that, The rear extension rod (31) is integrally connected to the center of the narrow part of the clamping rib (3), and the width of the clamping rib (3) gradually increases in the direction away from the front support plate (1).

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