Seat chassis and seat

Abstract

The utility model discloses a seat underframe and a seat, belongs to the technical field of seats, and is designed for solving the problems that the angle adjustment of a backrest of an existing seat only comprises limited gears and the like. The utility model discloses a seat bottom frame which comprises a bottom frame body. The adjustable springback piece is rotationally mounted on the bottom frame in the direction of the first rotating shaft; the driving assembly is movably arranged on the bottom frame and connected with the adjustable springback piece, and when the driving assembly moves relative to the bottom frame, the driving assembly drives the adjustable springback piece to rotate. According to the seat underframe and the seat, the driving assembly can drive the adjustable springback piece to rotate relative to the underframe, stepless adjustment of the inclination angle of the adjustable springback piece is achieved, the use experience is good, the structure is simple and reasonable, and use is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, and in particular to a seat base and a seat. Background Technology

[0002] To enhance user comfort, many types of seats, including car seats, feature adjustable backrests. These backrests offer both upright and reclining positions to meet various user needs.

[0003] Currently, most chair backrests are manually adjusted using a handle, with only a limited number of tilt angles available. Users are limited to choosing from these few angles, resulting in a poor user experience. Furthermore, the fact that existing chair backrests can only be manually adjusted is unfriendly to the elderly, children, the sick, the disabled, pregnant women, and other groups who are unable or unable to manually adjust the backrest, thus limiting their applicability. Utility Model Content

[0004] The purpose of this utility model is to propose a seat base and seat, which solves the problem that the existing seat backrest adjustment angle only includes a limited number of positions, resulting in a better user experience.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A seat base frame includes: a base frame; an adjustable spring element rotatably mounted on the base frame along a first axis of rotation; and a drive assembly movably disposed on the base frame and engaged with the adjustable spring element, wherein when the drive assembly moves relative to the base frame, the drive assembly drives the adjustable spring element to rotate.

[0007] In one preferred embodiment, the seat base frame further includes an adjustment assembly comprising a movable block slidably disposed on the adjustable spring, and a drive assembly comprising a drive rod rotatably mounted on the base frame, the drive rod engaging with the movable block to drive the movable block to slide when the drive rod rotates.

[0008] In one preferred embodiment, the drive rod is provided with a rotating mounting part and a drive part arranged in the axial direction. The rotating mounting part is rotatably connected to the base frame. The drive part is provided with an external thread. The movable block is provided with a threaded hole that mates with the thread of the drive part.

[0009] In one preferred embodiment, the drive rod extends in a direction perpendicular to the first rotating axis and drives the movable block to slide in a direction perpendicular to the first rotating axis.

[0010] In one preferred embodiment, the drive assembly further includes a first control member disposed at the end of the drive rod, the first control member being exposed outside the base frame and coaxially disposed with the drive rod.

[0011] In one preferred embodiment, the first control element is exposed at the bottom of the base frame.

[0012] In one preferred embodiment, the drive assembly further includes a second control member, a connecting rod, and a linkage structure rotatably mounted on the base frame. The second control member is exposed on the base frame and coaxially arranged with the connecting rod. The connecting rod engages with the drive rod to drive the drive rod to rotate when the connecting rod rotates.

[0013] In one preferred embodiment, the connecting rod extends in a direction perpendicular to the drive rod, and the linkage structure includes a connecting rod conical tooth disposed on the connecting rod and a drive rod conical tooth disposed on the drive rod, wherein the connecting rod conical tooth and the drive rod conical tooth mesh.

[0014] In one preferred embodiment, the second control member is exposed on the side of the base frame and there are two of them. The two second control members are respectively located on opposite sides of the base frame, and the two second control members drive the drive rod through the corresponding connecting rod.

[0015] In one preferred embodiment, the drive assembly further includes a motor connected to the drive rod, the motor being capable of driving the drive rod to rotate about its own axis.

[0016] In one preferred embodiment, the seat base further includes a rotating shaft, one of the base and the adjustable spring is fixedly connected to the rotating shaft, and the other of the base and the adjustable spring has a hole for the rotating shaft to pass through, and the adjustable spring can rotate relative to the base around the rotating shaft.

[0017] In one preferred embodiment, the seat base also has an adjustment assembly with an adjustment hole, and the seat base also includes an adjustment shaft that passes through the adjustment hole and is movably connected to the adjustable spring. The adjustment shaft is not coaxial with the rotation axis.

[0018] On the other hand, the present invention adopts the following technical solution:

[0019] The seat includes a seat body and a backrest, and the seat also includes the aforementioned seat base frame. The seat body is connected to the base frame, and the backrest is connected to an adjustable spring.

[0020] The seat base disclosed in this utility model includes a base frame, an adjustable spring, and a drive assembly. The drive assembly can drive the adjustable spring to rotate relative to the base frame, thereby achieving stepless adjustment of the tilt angle of the adjustable spring and providing a good user experience.

[0021] The seat disclosed in this utility model includes the aforementioned seat base frame. The seat back can rotate relative to the seat body through the seat base frame, and the tilt angle of the backrest can be infinitely adjusted, making it more comfortable and convenient to use. Attached Figure Description

[0022] Figure 1 This is a structural schematic diagram of a seat base provided in a specific embodiment of the present utility model;

[0023] Figure 2 This is a schematic diagram of a combined structure of an adjustable spring, an adjustment component, and a drive component provided in a specific embodiment of this utility model;

[0024] Figure 3 yes Figure 2 A magnified view of a section at point E in the middle;

[0025] Figure 4 This is a side view of a seat base frame in its most upright position according to a specific embodiment of this utility model;

[0026] Figure 5 This is a top view of a seat base frame in its most upright position according to a specific embodiment of this utility model;

[0027] Figure 6 yes Figure 5 Sectional view along line AA;

[0028] Figure 7 This is a schematic diagram of the structure of a seat base frame after removing the adjustable spring when it is in the most upright state, according to a specific embodiment of this utility model.

[0029] Figure 8 This is a side view of a seat base frame in its most tilted state, provided by a specific embodiment of this utility model;

[0030] Figure 9 This is a top view of a seat base frame in its most tilted state, provided by a specific embodiment of this utility model;

[0031] Figure 10 yes Figure 9 Sectional view along the BB direction;

[0032] Figure 11 This is a schematic diagram of the structure of a seat base frame after removing the adjustable spring when it is in the most tilted state, according to a specific embodiment of this utility model.

[0033] Figure 12 This is a schematic diagram of another seat base structure provided in a specific embodiment of this utility model;

[0034] Figure 13 This is a schematic diagram of another combination structure of an adjustable spring, an adjustment component, and a drive component provided in a specific embodiment of this utility model;

[0035] Figure 14 This is a side view of another seat base frame in its most upright state, provided by a specific embodiment of this utility model;

[0036] Figure 15 This is a top view of another seat base frame in its most upright state, provided by a specific embodiment of this utility model;

[0037] Figure 16 yes Figure 15 C-axis sectional view;

[0038] Figure 17 This is a schematic diagram of another embodiment of the present invention, showing the structure of the seat base frame in its most upright state after the adjustable spring is removed.

[0039] Figure 18 This is a side view of another seat base frame in its most tilted state, provided by a specific embodiment of this utility model;

[0040] Figure 19 This is a top view of another seat base frame in its most tilted state, provided by a specific embodiment of this utility model;

[0041] Figure 20 yes Figure 19 Sectional view along the DD direction;

[0042] Figure 21 This is a schematic diagram of another seat base frame after removing the adjustable spring when it is in the most tilted state, according to a specific embodiment of this utility model.

[0043] In the picture:

[0044] 1. Base frame; 2. Adjustable spring; 3. Movable block; 4. Drive rod; 5. Connecting rod; 6. Rotating shaft; 7. Adjusting shaft; 31. Adjusting hole; 41. Drive rod conical tooth; 42. First control component; 51. Second control component; 52. Connecting rod conical tooth. Detailed Implementation

[0045] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0046] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0050] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0051] This embodiment discloses a seat base and a seat including the seat base, which can be, but is not limited to, a car seat. The seat also includes a seat body and a backrest. The backrest can rotate relative to the seat body via the seat base, allowing for stepless adjustment of the backrest's tilt angle for greater comfort.

[0052] like Figure 1 As shown, the seat base includes a base frame 1, an adjustable spring 2, an adjustment assembly, and a drive assembly. The adjustable spring 2 is rotatably mounted on the rear of the base frame 1 along a first pivot direction. The seat body is connected to the base frame 1, and the backrest is connected to the adjustable spring 2. The drive assembly is movably mounted on the base frame 1 and engages with the adjustable spring 2. When the drive assembly moves relative to the base frame 1, it drives the adjustable spring 2 to rotate.

[0053] The specific method by which the drive assembly drives the adjustable spring 2 to rotate is not limited. In this embodiment, the seat base also includes an adjustment assembly, which is connected to the adjustable spring 2, and the drive assembly is connected to the adjustment assembly. When the drive assembly drives the adjustment assembly to move, the adjustable spring 2 can rotate relative to the base 1, realizing stepless adjustment of the tilt angle of the adjustable spring 2, resulting in a good user experience.

[0054] like Figure 2 and Figure 3As shown, the adjustment assembly includes a movable block 3 slidably disposed on the adjustable return spring 2, and the drive assembly includes a drive rod 4 rotatably mounted on the base frame 1. The drive rod 4 engages with the movable block 3 to drive the movable block 3 to slide when the drive rod 4 rotates. Specifically, when the drive rod 4 rotates about its own axis, it can drive the movable block 3 to move along the axis of the drive rod 4. When the movable block 3 moves, it can drive the adjustable return spring 2 to rotate relative to the base frame 1. The drive rod 4 extends in a direction perpendicular to the first axis of rotation and drives the movable block 3 to slide in a direction perpendicular to the first axis of rotation, thereby causing the adjustable return spring 2 to swing about the first axis of rotation.

[0055] To enable the movable block 3 to slide when the drive rod 4 rotates, the drive rod 4 is provided with a rotating mounting part and a drive part arranged axially. The rotating mounting part is rotatably connected to the base frame 1, and the drive part is provided with external threads to form a lead screw. The movable block 3 is provided with a threaded hole that mates with the thread of the drive part; that is, the movable block 3 is a lead screw nut that mates with the lead screw. The specific shape of the rotating mounting part and the connection structure with the base frame 1 are not limited; any existing structure that can achieve a rotating connection without affecting the sliding of the movable block 3 when the drive rod 4 rotates can be used.

[0056] The specific method by which "the movable block 3 can drive the adjustable spring 2 to rotate relative to the base frame 1 when it moves" is not limited. In this embodiment, for example... Figures 1 to 3 As shown, the seat base also includes a rotating shaft 6. One of the base frame 1 and the adjustable spring 2 is fixedly connected to the rotating shaft 6. The other of the base frame 1 and the adjustable spring 2 has a hole (not shown) for the rotating shaft 6 to pass through. The adjustable spring 2 can rotate relative to the base frame 1 around the rotating shaft 6. Figure 6 As shown, the adjustment assembly has an adjustment hole 31, the adjustment shaft 7 passes through the adjustment hole 31 and is movably connected to the adjustable spring 2, and the adjustment shaft 7 is not coaxial with the rotation shaft 6.

[0057] When the movable block 3 moves along the axis of the drive rod 4, the part of the adjustable spring 2 connected to the movable block 3 via the adjusting shaft 7 will move synchronously with the movable block 3. However, the rotating shaft 6 prevents the adjustable spring 2 from moving relative to the base frame 1. Therefore, the adjustable spring 2 will swing around the rotating shaft 6 to adjust the tilt angle of the adjustable spring 2.

[0058] To prevent the adjustable spring 2 and the base frame 1 from getting stuck, the adjustment hole 31 can be designed with a width equal to the diameter of the adjustment shaft 7 and a length greater than the diameter of the adjustment shaft 7, so that the adjustment shaft 7 can move moderately in the adjustment hole 31.

[0059] The seat base has a simple and reasonable structure. Users can control the number of rotations of the drive rod 4 as needed, thereby precisely controlling the movement distance of the movable block 3. The tilt angle of the adjustable spring 2 corresponds one-to-one with the height of the movable block 3. By adjusting the position of the movable block 3 on the drive rod 4, the tilt angle of the adjustable spring 2 can be adjusted, achieving stepless adjustment of the tilt angle. This can meet various personalized needs of users for the backrest tilt angle, has a wide range of applications, and provides a good user experience.

[0060] The specific method of driving the drive rod 4 to rotate is not limited, as long as it allows the drive rod 4 to rotate around its own axis. In this embodiment, one approach is to drive the drive rod 4 to rotate through the meshing of bevel gears. Specifically, as shown... Figures 4 to 11 As shown, the drive assembly also includes a second control member 51 rotatably mounted on the base frame 1, a connecting rod 5, and a linkage structure. The second control member 51 is exposed on the base frame 1 and coaxially arranged with the connecting rod 5. The connecting rod 5 engages with the drive rod 4 to drive the drive rod 4 to rotate when the connecting rod 5 rotates. Specifically, the connecting rod 5 extends in a direction perpendicular to the drive rod 4. The linkage structure includes a connecting rod conical tooth 52 disposed on the connecting rod 5 and a drive rod conical tooth 41 disposed on the drive rod 4. The connecting rod conical tooth 52 and the drive rod conical tooth 41 mesh with each other.

[0061] Manually rotating the second control element 51 causes the connecting rod 5 to rotate around its own axis, and the connecting rod conical tooth 52 rotates synchronously with the connecting rod 5. The drive rod conical tooth 41 meshes with the connecting rod conical tooth 52, so the drive rod conical tooth 41 can rotate around the axis of the drive rod 4 under the drive of the connecting rod conical tooth 52. The drive rod 4 rotates synchronously with the drive rod conical tooth 41 to drive the movable block 3 to move along the axis of the drive rod 4.

[0062] To prevent the connecting rod conical teeth 52 from driving the drive rod conical teeth 41 radially when they rotate, in this embodiment, connecting rods 5 are respectively provided on the left and right sides of the drive rod conical teeth 41, and the two connecting rods 5 are symmetrically arranged with respect to the drive rod conical teeth 41. Two second control members 51 are respectively provided on opposite sides of the base frame 1, and the two second control members 51 drive the drive rod 4 through the corresponding connecting rods 5.

[0063] The two connecting rods 5 are coaxial, and the axes of the two connecting rods 5 pass through the axis of the drive rod bevel gear 41. Each connecting rod 5 is provided with a connecting rod bevel gear 52, and the drive rod bevel gear 41 is a 90° bevel gear, which can mesh with the connecting rod bevel gears 52 on both sides respectively, making the transmission smoother.

[0064] Two connecting rod conical teeth 52 mesh with the drive rod conical teeth 41 from opposite sides. The thrust exerted by the two connecting rod conical teeth 52 on the drive rod conical teeth 41 can cancel each other out, preventing the drive rod conical teeth 41 from shifting or deforming radially. This ensures a more stable meshing structure between the connecting rod conical teeth 52 and the drive rod conical teeth 41. The force exerted by the user on the second control component 51 can be applied to the drive rod conical teeth 41, making the tilt angle control of the adjustable spring component 2 more precise and providing a better user experience.

[0065] The specific location of the second control element 51 is not limited. For ease of use, the second control elements 51 on the two connecting rods 5 are exposed on opposite sides of the base frame 1. When the user is sitting in the seat, one second control element 51 is located on the user's left side and the other second control element 51 is located on the user's right side. The user can adjust the tilt angle of the adjustable spring 2 through the second control element 51 without getting up, so that the seat back can be tilted to the ideal angle.

[0066] The method of using the seat base frame with this structure is as follows: Figures 4 to 6 The adjustable spring 2 is shown in its most upright position, at which point the movable block 3 is located at the bottom of the drive rod 4. Twisting the second control member 51 causes the connecting rod 5 and the connecting rod bevel gear 52 to rotate synchronously with the second control member 51; the drive rod bevel gear 41 rotates under the drive of the connecting rod bevel gear 52, and the drive rod 4 rotates synchronously with the drive rod bevel gear 41, causing the movable block 3 to move upward along the drive rod 4. Figures 8 to 10 With the adjustable spring 2 in its most tilted state, the movable block 3 is located at the top of the drive rod 4.

[0067] Another solution is to directly drive the drive rod 4 to rotate via a knob, such as... Figure 12 and Figure 13 As shown, the drive assembly also includes a first control member 42 disposed at the end of the drive rod 4, which protrudes from the base frame 1. The first control member 42 is coaxially disposed with the drive rod 4, and the user can rotate the first control member 42 to make the drive rod 4 rotate synchronously, thereby adjusting the height of the movable block 3.

[0068] Based on the above structure, the first control component 42 is set at the bottom of the base frame 1, which can save space on the left and right sides of the seat and prevent clothes or bags from getting caught on the first control component 42, making it safer to use.

[0069] The method of using the seat base frame with this structure is as follows: Figures 14 to 17 With the adjustable spring 2 in its most upright position, the movable block 3 is located at the bottom of the drive rod 4. Rotating the first control member 42 causes the drive rod 4, which rotates synchronously with the first control member 42, to drive the movable block 3 upward. Figures 18 to 21 With the adjustable spring 2 in its most tilted state, the movable block 3 is located at the top of the drive rod 4.

[0070] Another option is that the drive assembly also includes a motor (not shown) connected to the drive rod 4, which can drive the drive rod 4 to rotate around its own axis. This allows for stepless adjustment of the tilt angle of the adjustable spring 2 via electric means, making it more convenient to use. It is also suitable for the elderly, children, the sick, the disabled, pregnant women, and other people who are unable or inconvenient to manually adjust the backrest, saving time and effort.

[0071] The specific starting method of the motor is not limited. It can be remote control or the motor start button can be placed in a position that is easier for the user to touch, so that the motor can drive the drive rod 4 to rotate around its own axis.

[0072] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A seat base frame, characterized in that, include: Base frame; An adjustable spring is rotatably mounted on the base frame along the direction of the first axis of rotation; as well as, A drive assembly is movably mounted on the base frame and engages with the adjustable spring. When the drive assembly moves relative to the base frame, the drive assembly drives the adjustable spring to rotate.

2. The seat base frame according to claim 1, characterized in that, The seat base also has an adjustment assembly, which includes a movable block slidably disposed on the adjustable spring, and a drive assembly including a drive rod rotatably mounted on the base, the drive rod engaging with the movable block to drive the movable block to slide when the drive rod rotates.

3. The seat base frame according to claim 2, characterized in that, The drive rod is provided with a rotating mounting part and a drive part arranged in the axial direction. The rotating mounting part is rotatably connected to the base frame. The drive part is provided with an external thread. The movable block is provided with a threaded hole that mates with the thread of the drive part.

4. The seat base frame according to claim 3, characterized in that, The drive rod extends in a direction perpendicular to the first rotating axis and drives the movable block to slide in a direction perpendicular to the first rotating axis.

5. The seat base frame according to claim 3, characterized in that, The drive assembly also has a first control member disposed at the end of the drive rod, the first control member being exposed outside the base frame and coaxially disposed with the drive rod.

6. The seat base frame according to claim 5, characterized in that, The first control component is exposed at the bottom of the base frame.

7. The seat base frame according to claim 3, characterized in that, The drive assembly also includes a second control element, a connecting rod, and a linkage structure rotatably mounted on the base frame. The second control element is exposed on the base frame and coaxially arranged with the connecting rod. The connecting rod engages with the drive rod to drive the drive rod to rotate when the connecting rod rotates.

8. The seat base frame according to claim 7, characterized in that, The connecting rod extends in a direction perpendicular to the drive rod, and the linkage structure includes a connecting rod conical tooth disposed on the connecting rod and a drive rod conical tooth disposed on the drive rod, wherein the connecting rod conical tooth and the drive rod conical tooth mesh.

9. The seat base frame according to claim 8, characterized in that, The second control element is exposed on the side of the base frame and there are two of them. The two second control elements are respectively located on opposite sides of the base frame, and the two second control elements drive the drive rod through the corresponding connecting rod.

10. The seat base frame according to claim 2, characterized in that, The drive assembly also includes a motor connected to the drive rod, the motor being capable of driving the drive rod to rotate about its own axis.

11. The seat base frame according to any one of claims 1 to 10, characterized in that, The seat base also includes a rotating shaft. One of the base and the adjustable spring is fixedly connected to the rotating shaft. The other of the base and the adjustable spring has a hole for the rotating shaft to pass through. The adjustable spring can rotate relative to the base around the rotating shaft.

12. The seat base frame according to claim 11, characterized in that, The seat base also has an adjustment assembly with an adjustment hole. The seat base also includes an adjustment shaft, which passes through the adjustment hole and is movably connected to the adjustable spring. The adjustment shaft is not coaxial with the rotation shaft.

13. A seat, comprising a seat body and a backrest, characterized in that, The seat further includes a seat base frame as described in any one of claims 1 to 12, the seat body being connected to the base frame, and the backrest being connected to an adjustable spring.

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