A seat convertible in longitudinal and transverse directions

Abstract

The present invention provides a chair that can be converted in both longitudinal and transverse directions, comprising a seat, a backrest, an armrest connected between the seat and the backrest, and a base that rotatably supports the seat, wherein the seat and the backrest are rotatably connected via an axial hinge, and the armrest comprises an upper rod and a lower rod, wherein one end of the upper rod is rotatably connected to the backrest via an axial hinge, and the other end is rotatably connected to the upper end of the lower rod via an axial hinge, and the lower rod is rotatably connected to the seat via an axial hinge, so that the seat, the backrest, and the armrest are connected to form a parallelogram mechanism, and the lower rod is rotatably supported on the base. The present invention utilizes the side of the seat, the side of the backrest, and the armrest to form a parallelogram mechanism, and by pulling the armrest, the seat can be deformed so that the backrest is away from the side wall of the vehicle, thereby enabling the longitudinal and transverse adjustment of the seat without increasing the distance between the seat and the side wall of the vehicle.

Description

Technical Field

[0001] The invention belongs to the technical field of seats, in particular to a seat convertible in longitudinal and transverse directions. Background Art

[0002] Seats, especially those in vehicles, often need to be adjusted to suit their needs. They can typically be set horizontally or vertically. Some seats face the direction of travel, such as on buses, and are considered horizontally set. Other seats face the side of the vehicle, and are considered vertically set, such as on subways. Horizontally set seats align passengers' orientation with the vehicle's direction of travel, making them more comfortable. Vertically set seats create a larger standing space in the center of the vehicle, facilitating the carrying of more passengers and meeting the demands of morning and evening rush hours. Therefore, seats with a fixed orientation have poor adaptability and cannot be flexibly adjusted to meet specific needs.

[0003] The Chinese invention patent application number CN202210781701.8 discloses a rotating mechanism for a lightweight bus seat. The mechanism uses a rotating assembly supporting the seat to achieve rotational adjustment of the seat. Although this structure can achieve longitudinal and transverse adjustment of the seat, in order to make the middle space of the car larger when the seat is arranged longitudinally, the seat back needs to be as close to the vehicle side wall as possible, which is not conducive to the rotation of the seat. If the seat back is moved away from the car side wall, the middle space between the two seats will be smaller, which is not conducive to carrying more passengers. Therefore, how to achieve longitudinal and transverse adjustment of the seat without increasing the distance between the seat and the vehicle side wall has become a technical problem that needs to be solved urgently in the industry. Summary of the Invention

[0004] The purpose of the present invention is to address the above-mentioned problems existing in the prior art and to propose a longitudinally and transversely convertible seat, which can achieve longitudinal and transverse adjustment of the seat without increasing the distance between the seat and the vehicle side wall.

[0005] The objectives of the present invention can be achieved through the following technical solutions: a chair that can be converted in the longitudinal and transverse directions, comprising a seat, a backrest, an armrest connected between the seat and the backrest, and a base that rotatably supports the seat, the seat and the backrest being rotatably connected by an axial hinge, the armrest comprising an upper rod and a lower rod, one end of the upper rod being rotatably connected to the backrest by an axial hinge, the other end being rotatably connected to the upper end of the lower rod by an axial hinge, the lower rod being rotatably connected to the seat by an axial hinge, so that the seat, the backrest and the armrest are connected to form a parallel four-bar mechanism, and the lower rod is rotatably supported on the base.

[0006] In some embodiments, the armrest includes a left armrest and a right armrest located on the left and right sides of the seat, and the lower ends of the lower rods of the left and right armrests are connected to the same cross bar, and the cross bar is connected to a rotating shaft, and the rotating shaft is rotatably supported on the base.

[0007] In some embodiments, a support portion for supporting the bottom of the seat is provided on the rotating shaft.

[0008] In some embodiments, the support portion is a height-adjustable lifting device to adjust the tilt angle of the seat.

[0009] In some embodiments, the upper rod body is a curved rod.

[0010] In some embodiments, the base is provided with a positioning pin, and a positioning hole corresponding to the positioning pin is provided on the rotating shaft. The positioning hole includes a first positioning hole and a second positioning hole. The first positioning hole and the second positioning hole are 90 degrees apart in circumferential direction. The positioning pin is inserted into the positioning hole to fix the rotating shaft relative to the base.

[0011] In some embodiments, a support portion for supporting the bottom of the seat is provided on the base, and the support portion is a height-adjustable lifting device.

[0012] In some embodiments, the rotating shaft is controlled by a stepping motor to rotate relative to the base.

[0013] In some embodiments, the base is disposed on a slide rail.

[0014] Compared with the existing technology, this longitudinal and transverse convertible seat has the following advantages:

[0015] The present invention utilizes the seat side, the back side and the armrests to connect into a parallel four-bar mechanism. By pulling the armrests, the seat can be deformed so that the backrest is away from the side wall of the vehicle, thereby realizing the longitudinal and transverse adjustment of the seat without increasing the distance between the seat and the vehicle side wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In the accompanying drawings (which are not necessarily drawn to scale), like reference numerals may describe similar components in different views. Like reference numerals with different letter suffixes may represent different examples of similar components. The accompanying drawings generally illustrate various embodiments discussed herein by way of example and not limitation.

[0017] Figure 1 is a schematic side view of the seat when it is arranged longitudinally;

[0018] Figure 2 It is a front view schematic diagram of the seat when it is arranged longitudinally;

[0019] Figure 3 yes Figure 1 Schematic diagram of lifting the armrest upwards;

[0020] Figure 4 It is a top view schematic diagram of the seat when it is arranged longitudinally;

[0021] Figure 5 yes Figure 3 Schematic top view of

[0022] Figure 6 This is a top view of the seats when they are arranged horizontally.

[0023] In the figure, 1, seat; 2, backrest; 3, base; 4, upper rod; 5, lower rod; 6, cross bar; 7, rotating shaft; 8, support part; 9, positioning pin; 10, slide rail; 11, first positioning hole; 12, second positioning hole; 13, hook; 14, side wall of the carriage. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention, which are further described in conjunction with the accompanying drawings to further illustrate the technical solutions of the present invention. However, the present invention is not limited to these embodiments, and the following embodiments do not limit the inventions involved in the claims. In addition, not all combinations of features described in the embodiments are necessarily required for the solutions of the invention.

[0025] It should be understood by those skilled in the art that all directional references (e.g., above, below, upward, upper, downward, lower, top, bottom, left, right, vertical, horizontal, etc.) are used in a descriptive manner in the drawings to facilitate the reader's understanding and are not intended to limit the scope of the present invention as defined by the appended claims (e.g., to position, orientation, or use, etc.). In addition, the term "substantially" may refer to slight inaccuracies or slight deviations in conditions, amounts, values, or dimensions, etc., some of which are within manufacturing deviations or tolerances.

[0026] Example 1

[0027] like Figure 1 、 2 As shown in Figure 4, a chair that can be converted in both longitudinal and transverse directions comprises: a seat 1 for a person to sit on, a backrest 2 for a person to lean on, an armrest connected between the seat 1 and the backrest 2 for a person to hold by hand, and a base 3 for rotatably supporting the seat 1 so that the chair can be rotated to adjust the longitudinal and transverse directions.

[0028] The rear side of the seat 1 and the lower end of the seat back 2 are rotatably connected via an axis hinge so that the two can rotate relative to each other.

[0029] The armrest includes an upper rod 4 and a lower rod 5 , wherein the upper rod 4 is parallel to the side of the seat 1 , and the lower rod 5 is parallel to the side of the chair back 2 .

[0030] One end of the upper rod 4 is rotatably connected to the chair back 2 via an axial hinge, and the other end is rotatably connected to the upper end of the lower rod 5 via an axial hinge. The middle part of the lower rod 5 is rotatably connected to the seat via an axial hinge, so that the upper rod 4 and the lower rod 5 of the side of the seat 1, the side of the chair back 2 and the armrest are connected to form a parallel four-bar mechanism.

[0031] The armrest includes a left armrest and a right armrest located on the left and right sides of the seat, and two seats are arranged side by side between the left and right armrests. The lower ends of the lower rods 5 of the left and right armrests are connected to the same cross bar 6, and the cross bar 6 is connected to the rotating shaft 7. The rotating shaft 7 is rotatably supported on the base 3, so that the lower end of the lower rod 5 is rotatably supported on the base 3, so that the seat can rotate around the base 3 under the support of the lower rod 5.

[0032] In order to achieve stable support of the seat by the base 3, a support part 8 is provided on the rotating shaft 7 to support the bottom of the seat 1. The support part 8 supports the bottom of the seat 1 of two seats at the same time. Since the support part 8 and the lower rod 5 form a triangular three-point support for the seat, the seat 1 cannot be rotated downward, so that the seat can support people sitting.

[0033] Furthermore, the support portion 8 is a height-adjustable lifting device, such as a cylinder, to adjust the tilt angle of the seat 1.

[0034] Furthermore, the base 3 is provided with a locating pin 9, and the rotating shaft 7 is provided with a locating hole corresponding to the locating pin 9. The locating holes include a first locating hole 11 and a second locating hole 12. The first locating hole 11 and the second locating hole 12 are circumferentially offset. The locating pin 9 is inserted into the locating hole to secure the rotating shaft 7 relative to the base 3. When the locating pin 9 engages with the first locating hole 11, the seat is positioned longitudinally, and when the locating pin 9 engages with the second locating hole 12, the seat is positioned transversely. Of course, other methods can also be used to achieve relative fixation between the two. For example, the rotating shaft 7 can be controlled by a stepper motor or a servo motor to rotate relative to the base 3, and the motor can control the position of the two.

[0035] like Figure 3 、 5 As shown, when the seat needs to be rotated, the upper rod 4 can be pulled upward to deform the parallel four-bar mechanism composed of the seat and the armrest, thereby moving the seat back 2 upward and forward, thereby moving the seat back 2 away from the side wall 14 of the vehicle compartment, so that the seat is not hindered by the side wall 14 of the vehicle compartment when rotating, as shown in FIG. Figure 6As shown, when the seat is rotated to the required lateral position, the upper rod 4 is lowered, and the chair back 2 moves downward and backward under the action of the parallel four-bar mechanism, so that the seat 1 falls onto the support part 8, thereby supporting the bottom of the seat 1 and allowing passengers to sit again.

[0036] A stepping portion for the foot is provided below the bottom of the seat 1 and on the other side of the cross bar 6 opposite to the backrest 2. The stepping portion is a hook 13. Stepping down the hook 13 with the foot causes the seat 1 to tilt, which can assist in deformation of the seat and reduce the force of the hand pulling up the upper rod 4.

[0037] The upper rod body 4 is an arc-shaped rod, which is convenient for hand holding and lifting.

[0038] The base 3 is disposed on the slide rail 10 so as to facilitate adjustment of the distance between the base 3 and the side wall 14 of the carriage.

[0039] Although some terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention. The execution order of actions, steps, etc. in the devices and methods shown in the specification and drawings can be implemented in any order as long as there is no special explicit limitation on the order, as long as the output of the previous processing is not used in the subsequent processing. The use of "first" or "next" for the convenience of description does not mean that it must be implemented in this order.

[0040] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A chair that can be converted in both longitudinal and transverse directions, comprising a seat, a backrest, an armrest connected between the seat and the backrest, and a base for rotatably supporting the seat, characterized in that: The seat and the seat back are rotatably connected by an axial hinge, and the armrest includes an upper rod and a lower rod, one end of the upper rod is rotatably connected to the seat back by an axial hinge, and the other end is rotatably connected to the upper end of the lower rod by an axial hinge, and the lower rod is rotatably connected to the seat by an axial hinge, so that the seat, the seat back and the armrest are connected to form a parallel four-bar mechanism, and the lower rod is rotatably supported on the base; when the seat needs to be rotated, the upper rod is pulled upward to deform the parallel four-bar mechanism composed of the seat and the armrest, thereby causing the seat back to move upward and forward, thereby causing the seat back to move away from the side wall of the car, and thus ensuring that the seat is not hindered by the side wall of the car when rotating.

2. The longitudinal and transverse convertible seat according to claim 1, characterized in that: The armrests include a left armrest and a right armrest located on the left and right sides of the seat, the lower ends of the lower rods of the left and right armrests are connected to the same crossbar, the crossbar is connected to a rotating shaft, and the rotating shaft is rotatably supported on the base.

3. The longitudinal and transverse convertible seat according to claim 2, characterized in that: The rotating shaft is provided with a supporting portion for supporting the bottom of the seat.

4. The longitudinal and transverse convertible seat according to claim 3, characterized in that: The support portion is a height-adjustable lifting device to adjust the tilt angle of the seat.

5. The longitudinal and transverse convertible seat according to claim 1, characterized in that: The upper rod body is an arc-shaped rod.

6. The longitudinal and transverse convertible seat according to claim 2, characterized in that: The base is provided with a positioning pin, and a positioning hole corresponding to the positioning pin is provided on the rotating shaft. The positioning hole includes a first positioning hole and a second positioning hole. The first positioning hole and the second positioning hole are 90 degrees apart in circumferential direction. The positioning pin is inserted into the positioning hole to fix the rotating shaft relative to the base.

7. The longitudinal and transverse convertible seat according to claim 2, characterized in that: The base is provided with a supporting portion for supporting the bottom of the seat, and the supporting portion is a height-adjustable lifting device.

8. The longitudinal and transverse convertible seat according to claim 2, characterized in that: The rotating shaft is controlled by a stepping motor to rotate relative to the base.

9. The longitudinal and transverse convertible seat according to claim 1, characterized in that: The base is arranged on a slide rail.

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