Waist support of seat and seat

Abstract

The utility model discloses a waist support of a seat and the seat. The waist support of the seat comprises a main waist support, two auxiliary waist supports and a mounting seat, the main waist support is located on the front side of the mounting base, a connecting rod assembly is arranged between the main waist support and the mounting base and comprises two first connecting rods and two second connecting rods, one ends of the two second connecting rods are hinged to the main waist support, one ends of the two first connecting rods are hinged to the mounting base, and the other ends of the two first connecting rods are hinged to the two second connecting rods respectively; the two auxiliary waist supports are hinged to the mounting base so that the auxiliary waist supports can rotate around a first axis extending in the vertical direction relative to the mounting base, and linkage rods are arranged between the auxiliary waist supports and the second connecting rods; a locking block is fixedly connected to the auxiliary waist support, a locking piece is installed on the installation base, and the locking piece is movably matched with the installation base. According to the seat, a better supporting effect can be provided for users with different body types, manual adjustment of the users is not needed, and the use convenience and comfort of the seat are improved.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, specifically to a lumbar support and a seat. Background Technology

[0002] Many existing office chairs and gaming chairs are equipped with lumbar supports to provide support for the user's lower back and prevent fatigue caused by unsupported lower back. Current lumbar supports typically use a fixed support surface to support the user's lower back. A fixed support surface is difficult to provide support to the sides of the user's lower back. While the support surface can be made curved to support the sides of the lower back, to accommodate users of different body types, the curved support surface needs to be designed with considerable redundancy. For users with wider waists, the lumbar support can fit the lower back well; however, for slender users, the sides of the lumbar support are insufficient to provide adequate support. Utility Model Content

[0003] The purpose of this invention is to provide a lumbar support and seat that can provide better support for the waist of users of different body types, thereby improving the comfort of the seat.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The lumbar support of the seat includes a main lumbar support, two auxiliary lumbar supports located on both sides of the main lumbar support, and a mounting base;

[0006] The main lumbar support is located on the front side of the mounting base. A linkage assembly is provided between the main lumbar support and the mounting base. The linkage assembly includes two first linkages and two second linkages. One end of the two second linkages is hinged to the main lumbar support, one end of the two first linkages is hinged to the mounting base, and the other end of the two first linkages is respectively hinged to the two second linkages.

[0007] Two lumbar supports are hinged to the mounting base so that the lumbar supports can rotate relative to the mounting base about the vertically extending first axis. A connecting rod is provided between each lumbar support and the second connecting rod adjacent to it. The two ends of the connecting rod are hinged to the lumbar support and the second connecting rod, respectively.

[0008] A locking block is fixedly connected to the secondary waist support, and a locking element is installed on the mounting base. The locking element is movably engaged with the mounting base so that the locking element can move between a first position engaged with the locking block and a second position disengaged from the locking block.

[0009] Preferably, the locking block is provided with a plurality of first protruding teeth arranged around a first axis, and the locking member is provided with a plurality of second protruding teeth. When the locking member is in the first position, the plurality of first protruding teeth and the plurality of second protruding teeth engage together.

[0010] Preferably, the mounting base is provided with a mounting groove that is recessed forward from its rear side, and the locking member is embedded in the mounting groove so that the locking member can move relative to the mounting base in the front-back direction. A handle located on the rear side of the locking member is pivotally connected to the mounting base, and a boss is provided on the handle. The boss is used to press the locking member forward so that the locking member is held in the first position.

[0011] Preferably, a rotating seat is provided on the front side of the mounting slot on the mounting base, and the auxiliary waist support is pivotally connected to the rotating seat through a rotating shaft, with the first axis being the central axis of the rotating shaft; a through groove is provided at the front end of the mounting slot, extending through the rotating seat, and a locking member extends into the rotating seat through the through groove.

[0012] Preferably, the other end of the first link is hinged to the middle of the second link, one end of the connecting rod is hinged to the other end of the second link, and the other end of the connecting rod is hinged to the auxiliary waist support.

[0013] Preferably, the secondary lumbar support is provided with a connecting arm protruding from the secondary lumbar support. The end of the connecting arm near the secondary lumbar support is pivotally connected to the mounting base so that the connecting arm can rotate relative to the mounting base about a first axis. The other end of the linkage rod is hinged to the connecting arm so that the linkage rod can rotate relative to the connecting arm about a second axis. The second axis is parallel to the first axis and offset from it. The end of the connecting arm away from the secondary lumbar support forms a locking block.

[0014] Preferably, a torsion spring is provided between the connecting arm and the mounting base. The torsion spring is used to apply elastic stress to the connecting arm so that the connecting arm always tends to swing outward relative to the mounting base.

[0015] Preferably, a connecting block is detachably fixed on the mounting base, and one end of the first connecting rod is hinged to the connecting block; a connecting plate is provided on the side of the connecting arm away from the locking block, and the connecting plate is detachably fixed to the auxiliary waist support.

[0016] Preferably, the main lumbar support includes a lumbar support outer frame and a support mesh installed inside the lumbar support outer frame; the lumbar support outer frame includes two vertical beams located on both sides thereon, and one end of each of the two second connecting rods is hinged to the two vertical beams.

[0017] Seats, including the lumbar support of the aforementioned seats.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] In this invention, a linkage assembly is provided between the main lumbar support and the mounting base, allowing the main lumbar support to move back and forth relative to the mounting base. The linkage assembly is connected to the secondary lumbar support via a connecting rod. When the main lumbar support moves relative to the mounting base, it can drive the secondary lumbar support to swing in the inward and outward directions, enabling the main lumbar support and the two secondary lumbar supports to move independently to automatically adapt to the waist of users with different body types. Consequently, the lumbar support can provide better support for users with different body types without requiring manual adjustment by the user, thus improving the convenience and comfort of the chair. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a cross-sectional view of the present invention;

[0022] Figure 3 This is a schematic diagram of one usage state of the present invention;

[0023] Figure 4 This is a schematic diagram showing the cooperation between the locking component and the handle of this utility model.

[0024] The components are as follows: 10. Mounting base; 11. Connecting block; 12. Rotary seat; 13. Mounting groove; 14. Through groove; 20. Main waist support; 21. Outer frame; 211. Vertical beam; 212. Rotary seat; 30. Secondary waist support; 31. Connecting arm; 32. Locking block; 321. First tooth; 33. Connecting plate; 41. First connecting rod; 42. Second connecting rod; 43. Linkage rod; 50. Locking element; 51. Second tooth; 60. Handle; 61. Boss; 70. Torsion spring. Detailed Implementation

[0025] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Unless otherwise specified, the materials and equipment used in this embodiment are all commercially available. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0026] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not 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 on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0027] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a connection through an intermediary, or a connection within two elements or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0028] like Figure 1 , 2As shown in Figures 3 and 4, this utility model discloses a lumbar support assembly for a seat, comprising a main lumbar support 20, two secondary lumbar supports 30, and a mounting base 10. The two secondary lumbar supports 30 are located on both sides of the main lumbar support 20. The mounting base 10 provides a mounting foundation for the main lumbar support 20 and the two secondary lumbar supports 30, so that the front side of the main lumbar support 20 and the front side of the two secondary lumbar supports 30 form a support surface for supporting the user's waist. The main lumbar support 20 is located on the front side of the mounting base 10. A connecting rod assembly is provided between the main lumbar support 20 and the mounting base 10. The connecting rod assembly includes two first connecting rods 41 and two second connecting rods 42. One end of each of the two second connecting rods 42 is hinged to the main lumbar support 20. The two first connecting rods 41... One end of each link is hinged to the mounting base 10. The two second links 42 are inclined outward from front to back, and the two first links 41 are inclined outward from back to front. The other ends of the two first links 41 are hinged to the two second links 42. The hinged first links 41 and second links 42 form a V-shape with the opening facing inward. Thus, the main lumbar support 20 is connected to the mounting base 10 by the two sets of first links 41 and second links 42 set on both sides between the mounting base 10 and the main lumbar support 20. By changing the angle of the V-shape formed by the first links 41 and second links 42, the main lumbar support 20 has the freedom to move relative to the mounting base 10 in the front-back direction. Two lumbar supports 30 are respectively hinged to the mounting base 10, allowing the lumbar supports 30 to rotate relative to the mounting base 10 about the vertically extending first axis O1. A connecting rod 43 is provided between the lumbar supports 30 and the second connecting rod 42 close to the lumbar supports 30, with both ends of the connecting rod 43 hinged to the lumbar supports 30 and the second connecting rod 42 respectively. A locking block 32 is fixedly provided on the lumbar supports 30, and a locking member 50 is installed on the mounting base 10. The locking member 50 is movably installed on the mounting base 10, allowing the locking member 50 to engage with the locking block 32. The locking member 50 moves between a first position and a second position separated from the locking block 32. That is, when the locking member 50 moves to the first position, the locking member 50 can engage with the locking block 32 to limit the degree of freedom of movement of the locking block 32 relative to the mounting base 10, thereby limiting the rotation of the auxiliary waist support 30 relative to the mounting base 10. When the locking member 50 moves to the second position, the locking member 50 separates from the locking block 32 and no longer limits the degree of freedom of movement of the locking block 32 relative to the mounting base 10. At this time, the auxiliary waist support 30 can rotate relative to the mounting base 10 around the first axis O1.

[0029] like Figure 2 , 3As shown, when using the lumbar support of this utility model seat, the locking member 50 can first be adjusted to the second position, that is, the locking member 50 is in a position that does not limit the rotational freedom of the secondary lumbar support 30. The middle position of the user's waist applies backward pressure to the main lumbar support 20, causing the main lumbar support 20 to move backward relative to the mounting base 10. The first connecting rod 41 and the second connecting rod 42 swing accordingly, causing the connecting rod 43 to pull the secondary lumbar support 30 to swing inward around the first axis O1 until the secondary lumbar support 30 is close to the side of the user's waist. The main lumbar support 20 and the two secondary lumbar supports 30 form an optimal state to support the user's waist. At this time, the locking member 50 is adjusted to the first position. The locking member 50 cooperates with the locking block 32 to lock the secondary lumbar support 30 in the above-mentioned optimal state. After the secondary lumbar support 30 is locked, the connecting rod 43 is locked, which in turn locks the first connecting rod 41 and the second connecting rod 42, so that the main lumbar support 20 is also kept in the above-mentioned optimal state. When different users use the seat, simply adjust the locking element 50 to the second position, pull the main lumbar support 20 forward, and the linkage assembly and the two linkage rods 43 will cooperate to pull the two secondary lumbar supports 30 to the desired position. Figure 2 As shown, with the main lumbar support 20 extended, the user simply needs to sit normally on the seat cushion, allowing their lower back to press the main lumbar support 20 backward. The two auxiliary lumbar supports 30 will automatically conform to the sides of the user's lower back. Finally, adjusting the locking member 50 to the first position allows the lumbar support to adapt to the user's body shape, achieving optimal support. In this invention, a linkage assembly is provided between the main lumbar support 20 and the mounting base 10, allowing the main lumbar support 20 to move back and forth relative to the mounting base 10. The linkage assembly is connected to the auxiliary lumbar supports 30 via a connecting rod 43. When the main lumbar support 20 moves relative to the mounting base 10, it can cause the auxiliary lumbar supports 30 to swing in the inward and outward directions, allowing the main lumbar support 20 and the two auxiliary lumbar supports 30 to move automatically to adapt to the lower backs of users with different body shapes. Consequently, the lumbar support can provide better support for users of different body shapes without the need for manual adjustment, improving the convenience and comfort of the seat.

[0030] In a preferred embodiment, the locking block 32 is provided with a plurality of first protruding teeth 321 arranged around the first axis O1, and the locking member 50 is provided with a plurality of second protruding teeth 51. When the locking member 50 is in the first position, the plurality of first protruding teeth 321 and the plurality of second protruding teeth 51 engage together. In other embodiments, in order to achieve the engagement between the locking member 50 and the locking block 32, the aforementioned first protruding teeth 321 and second protruding teeth 51 may also adopt other structures that facilitate the engagement between the locking member 50 and the locking block 32.

[0031] The mounting base 10 has a mounting groove 13 recessed forward from its rear side. The locking member 50 is inserted into the mounting groove 13 from the rear side of the mounting base 10, allowing the locking member 50 to move back and forth within the mounting groove 13, i.e., to move relative to the mounting base 10 in the front-back direction. A handle 60 is pivotally connected to the mounting base 10. The handle 60 is located behind the locking member 50 and is used to stop the locking member 50, preventing it from disengaging from the rear opening of the mounting groove 13. A protrusion 61 is provided on the handle 60. When the handle 60 is rotated to a predetermined position... The boss 61 abuts against the rear side of the locking member 50, and as the handle 60 continues to rotate, the boss 61 pushes the locking member 50 forward, causing the locking member 50 to move to the first position. The shape of the boss 61 ensures that the boss 61 is engaged and fixed with the locking member 50. When it is necessary to disengage the locking member 50 from the locking block 32, the handle 60 is rotated, causing the boss 61 to rotate at a certain angle. It no longer applies a forward pushing force to the locking member 50, allowing the locking member 50 to move backward under the action of other external forces, so as to disengage from the locking block 32.

[0032] A rotating seat 12 is provided on the front side of the mounting groove 13 on the mounting base 10. The secondary waist support 30 is pivotally connected to the rotating seat 12 via a rotating shaft. The first axis O1 is the central axis of the rotating shaft. A through groove 14 is provided at the front end of the mounting groove 13, extending through to the rotating seat 12. The locking member 50 extends into the rotating seat 12 through the through groove 14. That is, the through groove 14 avoids the locking member 50, so that the locking member 50 can move forward and cooperate with the locking block 32 on the secondary waist support 30.

[0033] In this invention, the other end of the first connecting rod 41 is hinged to the middle of the second connecting rod 42, so that the second connecting rod 42 protrudes from the first connecting rod 41. One end of the connecting rod 43 is hinged to the other end of the second connecting rod 42, and the other end of the connecting rod 43 is hinged to the auxiliary lumbar support 30. Since the first connecting rod 41 is hinged to the middle of the second connecting rod 42, and the other end of the second connecting rod 42 is hinged to the connecting rod 43, the other end of the second connecting rod 42 has a relatively large swing amplitude. Thus, when the second connecting rod 42 swings slightly relative to the main lumbar support 20, the connecting rod 43 can generate a relatively large displacement, thereby enabling the connecting rod 43 to drive the auxiliary lumbar support 30 to rotate around the first axis O1 at an angle that meets the support requirements of the user's waist side. Of course, in other embodiments, the connecting rod 43 can be hinged to the middle of the second connecting rod 42, and both ends of the second connecting rod 42 can be hinged to the main waist support 20 and the first connecting rod 41 respectively. Alternatively, a shaft can be used to connect the connecting rod 43, the first connecting rod 41, and the second connecting rod 42, with the hinge position of the first connecting rod 41 and the second connecting rod 42 coinciding with the hinge position of the second connecting rod 42 and the connecting rod 43. It should be noted that in other embodiments, the first connecting rod 41 and the second connecting rod 42 can form a V-shape with the opening facing outwards, which can also drive the connecting rod 43 to move when the second connecting rod 42 and the first connecting rod 41 swing.

[0034] A connecting arm 31 protruding from the secondary lumbar support 30 is provided on the secondary lumbar support 30. The end of the connecting arm 31 near the secondary lumbar support 30 is pivotally connected to the mounting base 10, so that the connecting arm 31 can rotate relative to the mounting base 10 around the first axis O1. Specifically, the connecting arm 31 can be pivotally connected to the rotating base 12 on the mounting base 10. The other end of the linkage 43 is hinged to the connecting arm 31, so that the linkage 43 can rotate relative to the connecting arm 31 around the second axis O2. The second axis O2 is parallel to the first axis O1 and is offset from each other by a certain distance. The end of the connecting arm 31 away from the secondary lumbar support 30 forms a locking block 32. A torsion spring 70 is provided between the connecting arm 31 and the mounting base 10. One end of the torsion spring 70 abuts against the connecting arm 31, and the other end abuts against the mounting base 10. The torsion spring 70 applies an elastic stress to the connecting arm 31, causing the connecting arm 31 to maintain a tendency to swing outward relative to the mounting base 10. When the user needs to adjust the lumbar support, the handle 60 is released, and the locking member 50 and the locking block 32 no longer restrict the rotational freedom of the secondary lumbar support 30. The torsion spring 70 pushes the connecting arm 31 outward, causing the connecting arm 31 to drive the secondary lumbar support 30 to swing outward to return to its original position. Figure 2 The unfolded state shown.

[0035] A connecting block 11 is provided on the mounting base 10. The connecting block 11 can be fixed to the front side of the mounting base 10 by bolt connection or other detachable connection. One end of the first connecting rod 41 is hinged to the connecting block 11. A connecting plate 33 is provided on the side of the connecting arm 31 away from the locking block 32. The connecting plate 33 is fixed together with the secondary lumbar support 30 by bolt connection or other detachable connection. During assembly, the first connecting rod 41, the second connecting rod 42, the connecting rod 43, the connecting arm 31, and the connecting block 11 can be assembled together to form a component. Then, the component is connected together with the main lumbar support 20, the secondary lumbar support 30, and the mounting base 10, which facilitates the assembly of the lumbar support.

[0036] In this utility model, the main lumbar support 20 includes a lumbar support outer frame 21 and a support mesh. The support mesh is installed inside the lumbar support outer frame 21. The lumbar support outer frame 21 includes two vertical beams 211 located on both sides of it. A rotating seat 212 is provided on the rear side of each of the two vertical beams 211. One end of each of the two second connecting rods 42 is hinged to the two rotating seats 212.

[0037] The seat of this utility model includes the lumbar support of the aforementioned seat. The other structures of the seat are the same as those in the prior art and will not be described in detail here.

[0038] Finally, it should be noted that the above embodiments are only optional embodiments of this utility model and should not be used to limit the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A lumbar support for a seat, characterized in that, Includes a main lumbar support, two auxiliary lumbar supports located on either side of the main lumbar support, and a mounting base; The main lumbar support is located on the front side of the mounting base. A linkage assembly is provided between the main lumbar support and the mounting base. The linkage assembly includes two first linkages and two second linkages. One end of the two second linkages is hinged to the main lumbar support, one end of the two first linkages is hinged to the mounting base, and the other end of the two first linkages is respectively hinged to the two second linkages. Two lumbar supports are hinged to the mounting base so that the lumbar supports can rotate relative to the mounting base about the vertically extending first axis. A connecting rod is provided between each lumbar support and the second connecting rod adjacent to it. The two ends of the connecting rod are hinged to the lumbar support and the second connecting rod, respectively. A locking block is fixedly connected to the secondary waist support, and a locking element is installed on the mounting base. The locking element is movably engaged with the mounting base so that the locking element can move between a first position engaged with the locking block and a second position disengaged from the locking block.

2. The lumbar support of the seat as described in claim 1, characterized in that, The locking block is provided with multiple first protruding teeth arranged around the first axis, and the locking member is provided with multiple second protruding teeth. When the locking member is in the first position, the multiple first protruding teeth and the multiple second protruding teeth are engaged together.

3. The lumbar support of the seat as described in claim 1, characterized in that, The mounting base has a mounting groove that is recessed forward from its rear side. The locking element is embedded in the mounting groove so that the locking element can move relative to the mounting base in the front-back direction. A handle located on the rear side of the locking element is pivotally connected to the mounting base. The handle has a boss that is used to press the locking element forward so that the locking element is held in the first position.

4. The lumbar support of the seat as described in claim 3, characterized in that, A rotating seat is provided on the front side of the mounting slot on the mounting base. The secondary waist support is pivotally connected to the rotating seat through a rotating shaft. The first axis is the central axis of the rotating shaft. A through slot is provided at the front end of the mounting slot, which extends into the rotating seat. The locking element passes through the through slot and extends into the rotating seat.

5. The lumbar support of the seat as described in claim 1, characterized in that, The other end of the first link is hinged to the middle of the second link, one end of the connecting rod is hinged to the other end of the second link, and the other end of the connecting rod is hinged to the auxiliary waist support.

6. The lumbar support of the seat as described in claim 5, characterized in that, The secondary lumbar support is provided with a connecting arm protruding from the secondary lumbar support. The end of the connecting arm near the secondary lumbar support is pivotally connected to the mounting base so that the connecting arm can rotate relative to the mounting base about a first axis. The other end of the linkage rod is hinged to the connecting arm so that the linkage rod can rotate relative to the connecting arm about a second axis. The second axis is parallel to the first axis and is offset from it. The end of the connecting arm away from the secondary lumbar support forms a locking block.

7. The lumbar support of the seat as described in claim 6, characterized in that, A torsion spring is provided between the connecting arm and the mounting base. The torsion spring is used to apply elastic stress to the connecting arm so that the connecting arm always tends to swing outward relative to the mounting base.

8. The lumbar support of the seat as described in claim 7, characterized in that, A connecting block is detachably fixed on the mounting base, and one end of the first connecting rod is hinged to the connecting block; a connecting plate is provided on the side of the connecting arm away from the locking block, and the connecting plate is detachably fixed to the auxiliary waist support.

9. The lumbar support of the seat as described in claim 1, characterized in that, The main lumbar support includes a lumbar support outer frame and a support mesh installed inside the lumbar support outer frame; the lumbar support outer frame includes two vertical beams located on both sides of it, and one end of each of the two second connecting rods is hinged to the two vertical beams.

10. A seat, characterized in that, Includes the lumbar support of the seat as described in any one of claims 1-9.

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