Seat backrest and seat with same

Abstract

The utility model discloses a seat backrest and a seat with the seat backrest, the seat backrest comprises a backrest base, a backrest body and a multi-link mechanism, the backrest body is positioned on the front upper side of the backrest base and can move relative to the backrest base; comprising a first connecting rod and a second connecting rod, the first connecting rod is located above the second connecting rod, the first connecting rod comprises a first section and a second section which are sequentially connected, one end of the first section is rotationally connected with the backrest base, and one end of the second section is rotationally connected with the backrest body; the end, away from the backrest base, of the first section is fixedly connected with the end, away from the backrest body, of the second section, the first section and the second section form an angle, the second section extends forwards relative to the first section, one end of the second connecting rod is rotationally connected with the backrest body, and the other end of the second connecting rod is rotationally connected with the backrest base. According to the seat backrest disclosed by the utility model, the backrest body can be closer to the curves of the back and the waist of a user, and the supporting effect on the back and the waist of the user is better.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of seats, in particular to a seat back and a seat having the same. Background Art

[0002] In the prior art, the adjustment range of existing seats is relatively small, and the backrest cannot be closely fitted to the human waist, resulting in insufficient waist support after long-term use, affecting comfort. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a seat backrest that can make the backrest body more closely fit the user's back and waist curve, thereby providing better support for the user's back and waist.

[0004] The present invention also provides a seat, which comprises the seat backrest.

[0005] According to an embodiment of the utility model, the seat back comprises a backrest base, a backrest body and a multi-link mechanism, the backrest body is located on the front upper side of the backrest base and is movable relative to the backrest base; it comprises a first link and a second link, the first link is located above the second link, the first link comprises a first section and a second section connected in sequence, one end of the first section is rotatably connected to the backrest base, one end of the second section is rotatably connected to the backrest body, one end of the first section away from the backrest base and one end of the second section away from the backrest body are fixedly connected, the first section and the second section are angled to each other and the second section extends forward relative to the first section, one end of the second link is rotatably connected to the backrest body, and the other end is rotatably connected to the backrest base.

[0006] According to the seat back of the present invention, a multi-link mechanism is provided, wherein the first link is positioned above the second link, the first link being rotatably connected to both the backrest base and the backrest body, the second link having one end rotatably connected to the backrest body and the other end rotatably connected to the backrest base, and two connection locations between the backrest body and the seat back. This prevents the backrest body from rotating when the multi-link mechanism drives the backrest body to move, thereby making the movement of the backrest body more stable and reliable. Furthermore, the first and second sections of the first link are angled relative to each other, and the second section extends forward relative to the first section. One end of the first section is rotatably connected to the backrest base, and one end of the second section is rotatably connected to the backrest body. The end of the first section away from the backrest base and the end of the second section away from the backrest body are fixedly connected, facilitating the connection of the first link to the backrest body located on the front upper side of the backrest base, and allowing the backrest body to more closely conform to the user's back and lumbar curve, providing better support for the user's back and lumbar region.

[0007] In some embodiments of the present invention, the length of the line between the second section and the rotation axis of the backrest body and the rotation axis of the first section and the backrest base is L1, the length of the line between the second connecting rod and the rotation axis of the backrest body and the rotation axis of the second connecting rod and the backrest base is L2, and the following conditions are satisfied: L1 <L2。

[0008] In some embodiments of the present invention, the seat back further includes a driving device, which is disposed on the backrest base and connected to the second connecting rod, and is used to drive the second connecting rod to rotate.

[0009] In some embodiments of the present invention, the driving device is a gas rod, one end of which is rotatably connected to the backrest base, and the other end is rotatably connected to the second connecting rod, and the connection position is spaced apart from the connection position of the second connecting rod and the backrest base.

[0010] In some embodiments of the present invention, the multi-link mechanism is a plurality of groups arranged in sequence along the left-right direction, and the plurality of groups of multi-link mechanisms are spaced apart.

[0011] In some embodiments of the present invention, at least a portion of the plurality of first connecting rods are fixedly connected; and / or, at least a portion of the plurality of second connecting rods are fixedly connected.

[0012] In some embodiments of the present invention, the second connecting rod includes a third section and a fourth section, the third section and the fourth section are angled with each other and the fourth section extends forward relative to the third section, and the third section is used to abut against the front side of the backrest base.

[0013] In some embodiments of the present invention, the backrest base includes a first base and a second base, the first base extends in the up-down direction, the second base extends in the front-back direction, the rear end of the second base is connected to the lower end of the first base, the first section is rotatably connected to the upper end of the first base, and when the backrest body moves backward and upward to the maximum position, the length direction of the first section is the same as the length direction of the first base.

[0014] In some embodiments of the present invention, the first section and the second section are an integral piece.

[0015] In some embodiments of the present invention, the seat back further includes an elastic member, which is disposed between the second connecting rod and the backrest base and is used to drive the second connecting rod to rotate forward or backward.

[0016] In some embodiments of the present invention, a connecting member is provided on the rear side of the backrest body, the connecting member extends in the up-down direction, and the second section and the second connecting rod are rotatably connected to the upper and lower ends of the connecting member respectively.

[0017] The seat according to the embodiment of the present invention comprises a seat surface and the above-mentioned seat backrest, wherein the backrest base is fixedly connected to the seat surface.

[0018] According to the seat of the embodiment of the present invention, a multi-link mechanism is provided, wherein the first link is located above the second link, the first link is rotatably connected to both the backrest base and the backrest body, one end of the second link is rotatably connected to the backrest body, and the other end is rotatably connected to the backrest base. There are two connection locations between the backrest body and the seat back, which can prevent the backrest body from rotating when the multi-link mechanism drives the backrest body to move, making the movement of the backrest body more stable and reliable. At the same time, the first section and the second section of the first link are at an angle to each other, and the second section extends forward relative to the first section. One end of the first section is rotatably connected to the backrest base, and one end of the second section is rotatably connected to the backrest body. The end of the first section away from the backrest base and the end of the second section away from the backrest body are fixedly connected, which facilitates the connection of the first link to the backrest body located on the front upper side of the backrest base, and can make the backrest body closer to the user's back and waist curve, providing better support for the user's back and waist.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 is a cross-sectional view of a seat according to an embodiment of the present utility model;

[0022] Figure 2 is a perspective view of a seat back according to an embodiment of the present invention with a portion of the backrest body removed;

[0023] Figure 3 It is a three-dimensional view of a seat back according to an embodiment of the present invention with the backrest body removed.

[0024] Reference numerals:

[0025] 100. Seat;

[0026] 10. Seat back;

[0027] 1. Backrest base; 11. First base; 12. Second base;

[0028] 2. Backrest body; 21. Connecting parts;

[0029] 3. Multi-link mechanism; 31. First link; 311. First section; 312. Second section; 32. Second link; 321. Third section; 322. Fourth section;

[0030] 4. Driving device; 5. Elastic member;

[0031] 20. Seat surface. DETAILED DESCRIPTION

[0032] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0034] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0035] Reference below Figure 1-Figure 3 A seat back 10 according to an embodiment of the present invention will be described.

[0036] like Figure 1As shown, the seat back 10 according to the embodiment of the present invention includes a backrest base 1 , a backrest body 2 and a multi-link mechanism 3 .

[0037] Specifically, the seat back 10 is used in the seat 100. The backrest base 1 is the basic support structure of the seat back 10, bearing the user's weight and various forces during use. The main function of the backrest body 2 is to support the user's back, relieve pressure on the back and spine, and thus improve user comfort.

[0038] Furthermore, the design of the backrest body 2 takes ergonomic principles into consideration to ensure that it can fit the user's back curve and provide the best support effect.

[0039] like Figure 1 As shown, the backrest body 2 is located on the upper front side of the backrest base 1 and is movable relative to the backrest base 1. The position between the backrest body 2 and the backrest base 1 can be adjusted according to user needs to adapt to the usage needs of different users.

[0040] like Figure 1 As shown, the multi-link mechanism 3 includes a first link 31 and a second link 32. The first link 31 is located above the second link 32. The first link 31 includes a first section 311 and a second section 312 connected in sequence. One end of the first section 311 is rotatably connected to the backrest base 1, and one end of the second section 312 is rotatably connected to the backrest body 2, thereby realizing a preliminary connection between the backrest body 2 and the seat back 10.

[0041] like Figure 1 As shown, one end of the second connecting rod 32 is rotatably connected to the backrest body 2, and the other end is rotatably connected to the backrest base 1. There are two connection positions between the backrest body 2 and the seat back 10, which can prevent the backrest body 2 from rotating when the multi-link mechanism 3 drives the backrest body 2 to move forward and downward or drives the backrest body 2 to move backward and upward, so that the forward and downward movement or backward and upward movement of the backrest body 2 is more stable and reliable.

[0042] The end of the first section 311 away from the backrest base 1 and the end of the second section 312 away from the backrest body 2 are fixedly connected. The first section 311 and the second section 312 are angled with each other and the second section 312 extends forward relative to the first section 311, which facilitates the connection between the first connecting rod 31 and the backrest body 2 located on the front upper side of the backrest base 1, and can make the backrest body 2 closer to the user's back and waist curve, thereby providing better support for the user's back and waist.

[0043] According to the seat back 10 of the embodiment of the present utility model, by arranging a multi-link mechanism 3, the first link 31 is located above the second link 32. The first link 31 is rotatably connected to both the backrest base 1 and the backrest body 2. One end of the second link 32 is rotatably connected to the backrest body 2, and the other end is rotatably connected to the backrest base 1. There are two connection positions between the backrest body 2 and the seat back 10, which can prevent the backrest body 2 from rotating when the multi-link mechanism 3 drives the backrest body 2 to move, making the movement of the backrest body 2 relatively stable and reliable. At the same time, the first segment 311 and the second segment 312 of the first link 31 form an angle with each other and the second segment 312 extends forward relative to the first segment 311. One end of the first segment 311 is rotatably connected to the backrest base 1, and one end of the second segment 312 is rotatably connected to the backrest body 2. The end of the first segment 311 away from the backrest base 1 and the end of the second segment 312 away from the backrest body 2 are fixedly connected, which is convenient for the first link 31 to be connected to the backrest body 2 located at the front upper side of the backrest base 1, and can make the backrest body 2 more conform to the back and waist curves of the user, and has a better supporting effect on the back and waist of the user.

[0044] In some embodiments of the present utility model, as Figure 1 shown, the length of the line connecting the rotation axes of the second segment 312 and the backrest body 2 and the rotation axes of the first segment 311 and the backrest base 1 is L1, and the length of the line connecting the rotation axes of the second link 32 and the backrest body 2 and the rotation axes of the second link 32 and the backrest base 1 is L2, and it satisfies: L1 < L2. At this time, when the multi-link mechanism 3 drives the backrest body 2 to move forward and downward, the distance that the lower end position connected by the second link 32 moves forward is larger, so that the waist support component located at the lower end of the backrest body 2 can better support the waist of the user, making the user experience better.

[0045] In some embodiments of the present utility model, as Figure 1 and Figure 2 shown, the seat back 10 further includes a driving device 4. The driving device 4 is arranged on the backrest base 1 and connected to the second link 32 for driving the second link 32 to rotate. When the second link 32 rotates, it带动 the backrest body 2 to move forward and downward or带动 the backrest body 2 to move backward and upward, and the first link 31 rotates accordingly, realizing the driving of the backrest body 2 by the multi-link mechanism 3, and the driving method is relatively simple.

[0046] In some embodiments of the present utility model, as Figure 1 and Figure 2As shown, the driving device 4 is a gas rod, one end of which is rotatably connected to the backrest base, and the other end is rotatably connected to the second connecting rod 32, and the connection position is spaced apart from the connection position between the second connecting rod 32 and the backrest base 1. The gas rod drives the second connecting rod 32 through changes in air pressure. When the gas rod needs to be extended, high-pressure gas is released through a valve, pushing the piston outward, thereby extending the gas rod and pushing the second connecting rod 32 further. Conversely, when the gas rod needs to be retracted, the valve can be used to control the return flow of gas, causing the piston to move inward, retracting the gas rod and pulling the second connecting rod 32 closer. The gas rod is relatively easy to adjust, the supporting force is relatively uniform, and the gas rod is highly durable.

[0047] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the multi-link mechanism 3 is along the left and right directions (such as Figure 2 Multiple groups of multi-link mechanisms 3 are arranged in sequence in the left and right directions as shown, and the multiple groups of multi-link mechanisms 3 are separated. The backrest body 2 can be driven at multiple locations in the left and right directions, so that the movement of the backrest body 2 is more stable, avoiding vibration of the backrest body 2 and affecting the user's experience.

[0048] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, at least parts of the plurality of first connecting rods 31 are fixedly connected, so that the plurality of first connecting rods 31 can be connected as a whole, which can disperse the pressure received by the first connecting rods 31 and increase the strength of the first connecting rods 31 .

[0049] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, at least parts of the plurality of second connecting rods 32 are fixedly connected, so that the plurality of second connecting rods 32 can be connected as a whole, which can disperse the pressure received by the second connecting rods 32 and increase the strength of the second connecting rods 32 .

[0050] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the second connecting rod 32 includes a third section 321 and a fourth section 322. The third section 321 and the fourth section 322 are angled relative to each other, and the fourth section 322 extends forward relative to the third section 321. This facilitates the connection of the second connecting rod 32 with the backrest body 2 located on the front upper side of the backrest base 1, allowing the backrest body 2 to more closely conform to the user's back and waist curves, providing better support for the user's back and waist. The third section 321 is used to abut against the front side of the backrest base 1, limiting the second connecting rod 32 when it rotates to its final position, preventing the second connecting rod 32 from excessive rotation and ensuring more reliable rotation of the second connecting rod 32.

[0051] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, the backrest base 1 includes a first base 11 and a second base 12. The first base 11 is arranged in an up-down direction (such as Figure 1 The second base 12 extends in the front-to-back direction (as shown in the upper and lower directions). Figure 1 The backrest base 11 is connected to the seat surface 20 of the chair 100. The first section 311 is pivotally connected to the upper end of the first base 11. When the backrest body 2 moves backward and upward to its maximum position, the length direction of the first section 311 is the same as the length direction of the first base 11. When the backrest body 2 moves backward and upward to its maximum position, the first section 311 and the first base 11 both extend in the vertical direction. This allows the backrest body 2 to extend in the vertical direction, better supporting the user's back and waist as a whole when the user sits upright, thereby enhancing the user's experience.

[0052] In addition, the first base 11 can appropriately provide a limit for the first connecting rod 31, thereby increasing the reliability of the position of the first connecting rod 31 and preventing the backrest body 2 from excessively rotating backward, thereby providing a more reliable limit for the backrest body 2.

[0053] Meanwhile, the front side of the first base 11 is hollow, and at least a portion of the second connecting rod 32 is disposed in the hollow area of ​​the first base 11 , which facilitates the assembly of the second connecting rod 32 .

[0054] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, the first section 311 and the second section 312 are an integral part, which can simplify the processing and manufacturing process of the first connecting rod 31 and facilitate the assembly of the first connecting rod 31 with the backrest body 2 and the backrest base 1, thereby reducing the cost of the seat back 10.

[0055] In some embodiments of the present invention, Figure 2 and Figure 3As shown, the seat back 10 further includes an elastic member 5, which is disposed between the second connecting rod 32 and the backrest base 1 and is used to drive the second connecting rod 32 to rotate forward or backward. This elastic member 5 can increase the driving force on the second connecting rod 32 when the gas rod drives the second connecting rod 32 to rotate, thereby facilitating movement of the backrest body 2. For example, the elastic member 5 is used to drive the second connecting rod 32 to rotate forward. When the backrest body 2 moves backward and upward to its maximum position, the elastic member 5 stretches. When the external force exerted by the gas rod on the second connecting rod 32 to cause the backward rotation disappears, the elastic member 5 can drive the second connecting rod 32 to rotate forward. Alternatively, the elastic member 5 is used to drive the second connecting rod 32 to rotate backward. When the backrest body 2 moves forward and downward to its maximum position, the elastic member 5 compresses. When the external force exerted by the gas rod on the second connecting rod 32 to cause the forward rotation disappears, the elastic member 5 can drive the second connecting rod 32 to rotate backward.

[0056] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, a connector 21 is provided on the rear side of the backrest body 2. The connector 21 extends in the vertical direction, and the second section 312 and the second connecting rod 32 are rotatably connected to the upper and lower ends of the connector 21, respectively. This allows the second section 312 and the second connecting rod 32 to drive the movement of the backrest body 2, which is buffered by the connector 21. This prevents damage to the backrest body 2 when the second section 312 and the second connecting rod 32 apply force to the backrest body 2, thereby increasing the reliability of the backrest body 2. Furthermore, the connector 21 can serve as the skeleton of the backrest body 2, while other parts of the backrest body 2 can be elastic members 5, which can enhance the comfort of the user when leaning on the backrest body 2.

[0057] According to the seat 100 of the embodiment of the present invention, Figure 1 As shown, it includes a seat 20 and a seat back 10, the backrest base 1 is fixedly connected to the seat 20, the seat 20 supports the user's buttocks and thighs, and the seat back 10 supports the user's back and waist.

[0058] According to the seat 100 of the embodiment of the present invention, a multi-link mechanism 3 is provided, wherein the first link 31 is located above the second link 32, the first link 31 is rotatably connected to both the backrest base 1 and the backrest body 2, one end of the second link 32 is rotatably connected to the backrest body 2, and the other end is rotatably connected to the backrest base 1, and there are two connection positions between the backrest body 2 and the seat back 10, which can prevent the backrest body 2 from rotating when the multi-link mechanism 3 drives the backrest body 2 to move, thereby making the movement of the backrest body 2 more stable and reliable. At the same time, the first section 311 and the second section 312 of the first connecting rod 31 are angled with each other and the second section 312 extends forward relative to the first section 311, one end of the first section 311 is rotatably connected to the backrest base 1, and one end of the second section 312 is rotatably connected to the backrest body 2, and the end of the first section 311 away from the backrest base 1 and the end of the second section 312 away from the backrest body 2 are fixedly connected, which facilitates the connection between the first connecting rod 31 and the backrest body 2 located on the front upper side of the backrest base 1, and can make the backrest body 2 closer to the user's back and waist curve, thereby providing better support for the user's back and waist.

[0059] Other structures and operations of the seat back 10 and the seat 100 having the same according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0060] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0061] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A seat back, characterized in that: include: Backrest base; a backrest body, the backrest body being located on the upper front side of the backrest base and being movable relative to the backrest base; A multi-link mechanism includes a first link and a second link, the first link is located above the second link, the first link includes a first section and a second section connected in sequence, one end of the first section is rotatably connected to the backrest base, one end of the second section is rotatably connected to the backrest body, one end of the first section away from the backrest base and one end of the second section away from the backrest body are fixedly connected, the first section and the second section are angled to each other and the second section extends forward relative to the first section, one end of the second link is rotatably connected to the backrest body, and the other end is rotatably connected to the backrest base.

2. The seat back according to claim 1, wherein: The length of the line between the second section and the rotation axis of the backrest body and the first section and the rotation axis of the backrest base is L1, the length of the line between the second connecting rod and the rotation axis of the backrest body and the rotation axis of the second connecting rod and the backrest base is L2, and the following conditions are met: L1 <L2。 3. The seat back according to claim 1, wherein: Also includes: A driving device is provided on the backrest base and connected to the second connecting rod, and is used for driving the second connecting rod to rotate.

4. The seat back according to claim 3, wherein: The driving device is a gas rod, one end of which is rotatably connected to the backrest base, and the other end of which is rotatably connected to the second connecting rod, and the connection position is spaced apart from the connection position of the second connecting rod and the backrest base.

5. The seat back according to claim 1, wherein: The multi-link mechanism is a plurality of groups arranged in sequence along the left-right direction, and the plurality of groups of multi-link mechanisms are spaced apart.

6. The seat back according to claim 5, wherein: At least some of the first connecting rods are fixedly connected; And / or, at least parts of a plurality of second connecting rods are fixedly connected.

7. The seat back according to claim 1, wherein: The second connecting rod includes a third section and a fourth section, the third section and the fourth section are angled with each other, and the fourth section extends forward relative to the third section, and the third section is used to abut against the front side of the backrest base.

8. The seat back according to claim 1, wherein: The backrest base includes a first base and a second base, the first base extends in the up-down direction, the second base extends in the front-back direction, the rear end of the second base is connected to the lower end of the first base, the first section is rotatably connected to the upper end of the first base, and when the backrest body moves backward and upward to the maximum position, the length direction of the first section is the same as the length direction of the first base.

9. The seat back according to claim 1, wherein: The first section and the second section are a single piece.

10. The seat back according to claim 1, wherein: Also includes: An elastic member is provided between the second connecting rod and the backrest base, and is used for driving the second connecting rod to rotate forward or backward.

11. The seat back according to claim 1, wherein: A connecting piece is provided on the rear side of the backrest body, and the connecting piece extends in the up-down direction. The second section and the second connecting rod are rotatably connected to the upper and lower ends of the connecting piece respectively.

12. A seat, characterized in that: include: seat surface; According to any one of claims 1 to 11, the backrest base is fixedly connected to the seat surface.

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