Waist rest adjusting structure and chair

Abstract

The utility model discloses a waist rest adjusting structure and a chair, the waist rest adjusting structure comprises a mounting bracket, a waist rest and a massage machine core, the waist rest is arranged on the mounting bracket in a manner of sliding back and forth, and the massage machine core is slidably mounted in the middle of the waist rest in a manner of moving back and forth; a second driving mechanism for driving the waist rest to move back and forth is mounted on the mounting bracket; a first driving mechanism used for driving the massage machine core to move front and back is installed on the waist rest, and the first driving mechanism can drive the massage machine core to move front and back on the waist rest. In this way, the second driving mechanism can drive the waist rest to move, the massage machine core can be driven to move synchronously when the waist rest moves, and it is guaranteed that the relative positions of the waist rest and the massage machine core are unchanged; the first driving mechanism can independently drive the massage machine core to move relative to the waist rest; therefore, the second driving mechanism and the first driving mechanism are used for controlling the waist rest to move along with people, so that waist following is realized, and the waist rest and the massage machine core can be matched with people of various body types.

Description

Technical Field

[0001] This utility model relates to the field of home furnishings, and in particular to a lumbar support adjustment structure and a chair. Background Technology

[0002] Massage devices are popular health care appliances. Back massage is often achieved through massage chairs, which are constantly being updated and new models are emerging. Massage chairs work by massaging, kneading, and tapping specific parts of the body to relax muscles, improve blood circulation, and relieve fatigue.

[0003] The prior art disclosed in CN219847316U is a massage mesh chair and its backrest assembly, including a lumbar massage mechanism, and an adjustment assembly for adjusting the front and rear position of the lumbar massage mechanism. The adjustment assembly includes a first bracket, a second bracket, a first connecting rod, and a second connecting rod. The second bracket is fixed to the backrest frame, and the first bracket is located in front of the second bracket. One end of the first connecting rod is slidably connected to the second bracket, and the other end of the first connecting rod is hinged to the first bracket. One end of the second connecting rod is hinged to the second bracket, and the other end of the first bracket is slidably connected to the first bracket. The first and second connecting rods are arranged crosswise and hinged. The adjustment assembly also includes a driving component that moves the second bracket and the first bracket closer to or further away from each other.

[0004] In existing technology, only the position of the massage mechanism can be adjusted, but it is impossible to make the lumbar support follow the user or adjust the support position of the lumbar support, thus reducing the number of people who can use the chair. Utility Model Content

[0005] In order to solve the problem that only the massage mechanism can move in the existing technology, which makes the lumbar support unable to follow the user, the purpose of this utility model is to provide a lumbar support adjustment structure and chair, in which both the lumbar support and the massage mechanism can be adjusted independently, so that the lumbar support and the massage mechanism can be matched with people of various body types.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a lumbar support adjustment structure, including a mounting bracket, a lumbar support, and a massage mechanism. The lumbar support is slidably mounted on the mounting bracket, and the massage mechanism is slidably mounted in the middle position of the lumbar support. A second drive mechanism for driving the lumbar support to move back and forth is mounted on the mounting bracket. A first drive mechanism for driving the massage mechanism to move back and forth is mounted on the lumbar support. The first drive mechanism can drive the massage mechanism to move back and forth on the lumbar support.

[0007] Preferably, the mounting bracket includes a back plate and a mounting base, with the mounting base fixed to the front end of the back plate; the mounting base has a first receiving cavity with a forward opening; the lumbar support has a rearwardly extending connecting part, which is inserted into the first receiving cavity and slidably engaged; a second drive mechanism is disposed between the connecting part of the back plate and the lumbar support; the connecting part has a second receiving cavity, and the massage mechanism is disposed within the second receiving cavity; the second drive mechanism is disposed between the connecting part of the back plate and the lumbar support; and the first drive mechanism is disposed between the back plate and the massage mechanism.

[0008] Preferably, the second drive mechanism includes a motor, a bidirectional screw, a first drive rod, and a second drive rod; the bidirectional screw is rotatably mounted on the back plate, and the bidirectional screw includes a first threaded portion and a second threaded portion with opposite threads; one end of the first drive rod is threadedly connected to the first threaded portion, and the other end of the first drive rod is hinged to the connecting portion of the lumbar support; one end of the second drive rod is threadedly connected to the second threaded portion, and the other end of the second drive rod is hinged to the connecting portion of the lumbar support; the motor is mounted on a mounting bracket and connected to the bidirectional screw.

[0009] Preferably, the end of the first drive rod is provided with a third notch, the first nut is located in the third notch, the first nut is hinged to the first drive rod, and the first nut is sleeved on the first threaded part of the bidirectional screw; the end of the second drive rod is provided with a fourth notch, the second nut is located in the fourth notch, the second nut is hinged to the second drive rod, and the second nut is sleeved on the second threaded part of the bidirectional screw.

[0010] Preferably, the first drive rod and the second drive rod are arranged in an alternating manner.

[0011] Preferably, the first drive mechanism includes a fourth drive rod, the connecting bracket is slidably installed in the first accommodating cavity of the lumbar support, the massage mechanism is installed on the connecting bracket, the fourth drive rod is rotatably installed on the connecting part of the lumbar support, and the fourth drive rod is threadedly connected to the connecting bracket; when the fourth drive rod rotates, it can drive the connecting bracket to move the massage mechanism back and forth.

[0012] Preferably, the first drive mechanism further includes a third drive rod, which is rotatably mounted on the lumbar support. A first bevel gear is provided on the third drive rod, and a second bevel gear is provided on the fourth drive rod. The first bevel gear and the second bevel gear mesh and drive each other.

[0013] Preferably, there are two fourth drive rods, which are arranged symmetrically on the left and right. The third drive rod is provided with two first bevel gears, which mesh with the second bevel gears on the two fourth drive rods respectively.

[0014] Preferably, the handle is mounted on the third drive rod, with one end of the handle extending from the mounting base.

[0015] A chair comprising the aforementioned lumbar support adjustment structure.

[0016] The beneficial effects of the technical solution of this utility model are as follows: the second drive mechanism can drive the lumbar support to move, and when the lumbar support moves, it can drive the massage core to move synchronously, and ensure that the relative position of the lumbar support and the massage core remains unchanged; the first drive mechanism can drive the massage core to move relative to the lumbar support independently; in this way, by controlling the lumbar support to move with the person through the second drive mechanism and the first drive mechanism, the lumbar support can be tracked to the waist, thereby enabling the lumbar support and massage core to match people of various body types, thus providing users with better support and user experience. Attached Figure Description

[0017] Figure 1 Schematic diagram of the connection structure between the backrest and lumbar support adjustment mechanism Figure 1 ;

[0018] Figure 2 Schematic diagram of the connection structure between the backrest and lumbar support adjustment mechanism Figure 2 ;

[0019] Figure 3 for Figure 2 Sectional view along line AA;

[0020] Figure 4 for Figure 2 Sectional view along the BB direction;

[0021] Figure 5 Schematic diagram of the connection structure of the lumbar support adjustment mechanism Figure 1 ;

[0022] Figure 6 Schematic diagram of the connection structure of the lumbar support adjustment mechanism Figure 2 ;

[0023] Figure 7 A schematic diagram of the connection structure of the lumbar support adjustment mechanism after the back panel is removed;

[0024] Figure 8 A schematic diagram of the connection structure of the lumbar support adjustment mechanism after removing the back panel and backrest;

[0025] Figure 9 Schematic diagram of the structure of the second drive mechanism and the first drive mechanism Figure 1 ;

[0026] Figure 10 Schematic diagram of the structure of the second drive mechanism and the first drive mechanism Figure 2 ;

[0027] Figure 11 Schematic diagram of the lumbar support structure Figure 1 ;

[0028] Figure 12 Schematic diagram of the lumbar support structure Figure 2 .

[0029] Attached reference numerals: 1. Back frame;

[0030] 2. Mounting bracket; 21. Back panel; 22. Exterior trim panel; 23. Mounting base; 24. Second clearance hole;

[0031] 3. Lumbar support; 31. Connecting part; 32. Second receiving cavity; 34. Third receiving cavity; 35. Fourth receiving cavity; 36. First positioning part; 37. Second positioning part; 38. Guide seat;

[0032] 4. Backrest; 41. Elastic components;

[0033] 5. Massage mechanism; 51. Connecting bracket; 52. Third positioning part; 53. Guide part;

[0034] 6. First drive mechanism; 61. Third drive rod; 62. First bevel gear; 63. Fourth drive rod; 64. Second bevel gear; 65. Handle;

[0035] 7. Second drive mechanism; 71. Motor; 72. First bearing housing; 73. Second bearing housing; 74. Double-acting screw; 75. First nut; 76. Second nut; 77. First drive rod; 78. Second drive rod. Detailed Implementation

[0036] The embodiments of this utility model are described in detail below. Examples of these 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 intended to explain this utility model, and should not be construed as limiting this utility model.

[0037] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0038] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] like Figures 1 to 12 The lumbar support adjustment structure shown includes a mounting bracket 2, a lumbar support 3, and a massage mechanism 5. The lumbar support 3 is mounted on the mounting bracket 2 in a way that allows it to slide back and forth, and the massage mechanism 5 is slidably mounted in the middle position of the lumbar support 3 in a way that allows it to move back and forth.

[0042] The mounting bracket 2 is equipped with a second drive mechanism 7 for driving the lumbar support 3 to move back and forth.

[0043] The lumbar support 3 is equipped with a first drive mechanism 6 for driving the massage mechanism 5 to move back and forth. The first drive mechanism 6 can drive the massage mechanism 5 to move back and forth on the lumbar support 3.

[0044] With this configuration, the second drive mechanism can drive the lumbar support to move, and when the lumbar support moves, it can drive the massage core to move synchronously, while ensuring that the relative positions of the lumbar support and the massage core remain unchanged; the first drive mechanism can drive the massage core to move relative to the lumbar support independently; in this way, by controlling the lumbar support to follow the person's movement through the second drive mechanism and the first drive mechanism, the lumbar support can be tracked to the waist, thereby providing the user with better support and a better user experience.

[0045] In this embodiment, as Figures 2 to 6 As shown, the mounting bracket 2 includes a back plate 21 and a mounting base 23, with the mounting base 23 fixed to the front end of the back plate 21; the mounting base 23 has a first receiving cavity with a forward opening; as shown... Figure 11 and Figure 12 As shown, the lumbar support 3 is provided with a rearwardly extending connecting part 31, which is inserted into the first accommodating cavity and slides in fit; the second drive mechanism is provided between the back plate 21 and the connecting part 31; the connecting part 31 is provided with a second accommodating cavity 32, and the massage core 5 is provided in the second accommodating cavity 32.

[0046] In this embodiment, as Figures 6 to 10 As shown, the second drive mechanism 7 includes a motor 71, a bidirectional screw 74, a first drive rod 77, and a second drive rod 78. The bidirectional screw 74 is rotatably mounted on the back plate 21. The bidirectional screw 74 includes a first threaded portion and a second threaded portion with opposite threads. One end of the first drive rod 77 is threadedly connected to the first threaded portion, and the other end of the first drive rod 77 is hinged to the connecting portion 31 of the lumbar support 3. One end of the second drive rod 78 is threadedly connected to the second threaded portion, and the other end of the second drive rod 78 is hinged to the connecting portion 31 of the lumbar support 3. The motor 71 is mounted on the back plate 21 and connected to the bidirectional screw 74.

[0047] Further preferred, such as Figure 3 , Figure 9 and Figure 10 As shown, the first drive rod 77 and the second drive rod 78 are arranged in an intersecting manner. Furthermore, the top of the first drive rod 77 is provided with a first notch, and the bottom of the second drive rod 78 is provided with a second notch, and the first notch and the second notch are fastened together; thereby making the second drive mechanism 7 thinner.

[0048] Further preferred, such as Figure 3 , Figure 9 and Figure 10 As shown, the end of the first drive rod 77 is provided with a third notch, the first nut 75 is located in the third notch, the first nut 75 is hinged to the first drive rod 77, and the first nut 75 is sleeved on the first threaded part of the bidirectional screw 74; the end of the second drive rod 78 is provided with a fourth notch, the second nut 76 is located in the fourth notch, the second nut 76 is hinged to the second drive rod 78, and the second nut 76 is sleeved on the second threaded part of the bidirectional screw 74.

[0049] Further preferred, such as Figure 11 and Figure 12As shown, the rear end of the connecting part 31 on the lumbar support 3 is provided with a third receiving cavity 34 with a rearward opening. One end of the first drive rod 77 and one end of the second drive rod 78 extend into the third receiving cavity 34 and are hinged to the connecting part 31 of the lumbar support 3. The rear end of the connecting part 31 is provided with a fourth receiving cavity 35 with a rearward opening. When the lumbar support 3 moves to its rearmost position, the motor 71 can be inserted into the fourth receiving cavity 35. In this way, the thickness of the lumbar support 3 and the mounting bracket 2 can be further reduced.

[0050] Further preferred, such as Figure 3 , Figures 7 to 10 As shown, the first bearing seat 72 and the second bearing seat 73 are fixed on the back plate 21, and the two ends of the bidirectional screw 74 are respectively mounted on the first bearing seat 72 and the second bearing seat 73 through two bearings; the motor 71 is mounted on the back plate 21 through the motor seat.

[0051] In this embodiment, as Figure 4 , Figures 7 to 10 As shown, the first drive mechanism 6 includes a fourth drive rod 63, a connecting bracket 51 is slidably mounted on the connecting part 31 of the lumbar support 3, the massage core 5 is mounted on the connecting bracket 51, and the fourth drive rod 63 is rotatably mounted on the connecting part 31 of the lumbar support 3. The fourth drive rod 63 is threadedly connected to the connecting bracket 51. When the fourth drive rod 63 rotates, it can drive the connecting bracket 51 to move the massage core 5 back and forth.

[0052] Further preferred, such as Figure 4 , Figures 7 to 10 As shown, the first drive mechanism 6 also includes a third drive rod 61, which is rotatably mounted on the connecting part 31 of the lumbar support 3. A first bevel gear 62 is mounted on the third drive rod 61, and a second bevel gear 64 is mounted on the fourth drive rod 63. The first bevel gear 62 and the second bevel gear 64 mesh with each other. Specifically, there are two fourth drive rods 63, symmetrically arranged left and right. Two first bevel gears 62 are mounted on the third drive rod 61, and each of the two first bevel gears 62 meshes with the second bevel gears 64 on the two fourth drive rods 63 respectively.

[0053] Further preferred, such as Figure 5 and Figure 8 As shown, a first clearance hole 34 is provided on the side of the mounting base 23, and a handle 65 is mounted on the third drive rod 61. One end of the handle 65 extends out from the first clearance hole 34 of the mounting base 23.

[0054] In this embodiment, as Figure 4 , Figures 7 to 12As shown, the bottom of the second accommodating cavity 32 of the lumbar support 3 has a protruding guide seat 38, and the first guide seat is provided with a guide groove. The bottom of the connecting bracket 51 is provided with a guide part 53. When the guide seat 38 is inserted into the guide part 53, the lumbar support 3 and the connecting bracket 51 slide in engagement. The bottom of the second accommodating cavity 32 of the lumbar support 3 has a protruding first positioning part 36 and a second positioning part 37. The two first positioning parts 36 are arranged on the left and right sides. The third drive rod 61 passes through the two first positioning parts 36 and rotates in engagement. The two fourth drive rods 63 pass through the second positioning parts 37 and rotate in engagement. The bottom of the connecting bracket 51 has a protruding third positioning part 52. The third positioning part 52 has a threaded hole, and the fourth drive rod 63 is threadedly connected to the threaded hole. The first positioning part 36 is located at the rear end of the second accommodating cavity 32, the second positioning part 37 is located between the guide seat 38 and the first positioning part 36, and the two third positioning parts 52 are respectively located on the left and right sides of the guide seat 38.

[0055] In this embodiment, the mounting bracket 2 also includes an outer trim panel 22, which is sleeved on the mounting base 23 and fixedly connected to the back plate 21. A second clearance hole 24 for avoiding the handle is provided on the outer trim panel.

[0056] When the lumbar support is driven forward by the second drive mechanism, the motor starts and drives the bidirectional screw to rotate. The bidirectional screw drives the first drive rod and the second drive rod to move closer to each other. The first drive rod and the second drive rod gradually straighten and drive the lumbar support forward. The lumbar support drives the first drive mechanism and the massage core to move.

[0057] Rotating the handle of the first drive mechanism causes the third drive rod to rotate, which in turn causes the first bevel gear to rotate. The first bevel gear, through the second bevel gear, drives the fourth drive rod to rotate, which in turn drives the connecting bracket to move via a thread. The connecting bracket then moves the massage mechanism.

[0058] A chair includes the aforementioned lumbar support adjustment mechanism 3; it also includes a backrest 4, which is mounted on a back panel 21 via an elastic element 41; wherein the elastic element 41 includes soft rubber, rubber blocks, or springs, etc. The chair also includes a back frame 1 and a seat, with the back panel 21 fixed to the front end of the back frame 1 and the seat mounted on the bottom of the back frame 1.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do 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 one or more embodiments or examples.

[0060] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A lumbar support adjustment arrangement, characterized by: It includes a mounting bracket (2), a lumbar support (3) and a massage mechanism (5). The lumbar support (3) is mounted on the mounting bracket (2) in a way that allows it to slide back and forth, and the massage mechanism (5) is slidably mounted in the middle position of the lumbar support (3) in a way that allows it to move back and forth. The lumbar support (3) is equipped with a first drive mechanism (6) for driving the massage mechanism (5) to move back and forth, and the mounting bracket (2) is equipped with a second drive mechanism (7) for driving the lumbar support (3) to move back and forth.

2. The lumbar support adjustment structure according to claim 1, wherein: The mounting bracket (2) includes a back plate (21) and a mounting base (23), the mounting base (23) being fixed to the front end of the back plate (21); the mounting base (23) is provided with a first receiving cavity that opens forward; the lumbar support (3) is provided with a connecting part (31) that extends backward, the connecting part (31) being inserted into the first receiving cavity and slidingly engaged; a second drive mechanism is provided between the connecting part (31) of the back plate (21) and the lumbar support; the connecting part (31) is provided with a second receiving cavity (32), and the massage mechanism (5) is provided in the second receiving cavity (32); The second drive mechanism (7) is located between the connection between the back panel (21) and the lumbar support (3); the first drive mechanism (6) is located between the back panel (21) and the massage mechanism (5).

3. The lumbar support adjustment structure according to claim 2, characterized in that: The second drive mechanism (7) includes a motor (71), a bidirectional screw (74), a first drive rod (77), and a second drive rod (78). The bidirectional screw (74) is rotatably mounted on the back plate (21). The bidirectional screw (74) includes a first threaded part and a second threaded part with opposite threads. One end of the first drive rod (77) is threadedly connected to the first threaded part, and the other end of the first drive rod (77) is hinged to the connecting part (31) of the lumbar support (3). One end of the second drive rod (78) is threadedly connected to the second threaded part, and the other end of the second drive rod (78) is hinged to the connecting part (31) of the lumbar support (3). The motor (71) is mounted on the mounting bracket (2) and connected to the bidirectional screw (74).

4. The lumbar support adjustment structure according to claim 3, characterized in that: The end of the first drive rod (77) is provided with a third notch, the first nut (75) is located in the third notch, the first nut (75) is hinged to the first drive rod (77), and the first nut (75) is sleeved on the first threaded part of the bidirectional screw (74); The end of the second drive rod (78) is provided with a fourth notch, and the second nut (76) is provided in the fourth notch. The second nut (76) is hinged to the second drive rod (78) and is sleeved on the second threaded part of the bidirectional screw (74).

5. The lumbar support adjustment structure according to claim 3, characterized in that: The first drive rod (77) and the second drive rod (78) are arranged in an intersecting manner.

6. The lumbar support adjustment structure according to claim 2, characterized in that: The first drive mechanism (6) includes a fourth drive rod (63), a connecting bracket (51) is slidably installed in the first accommodating cavity of the lumbar support (3), a massage core (5) is installed on the connecting bracket (51), the fourth drive rod (63) is rotatably installed on the connecting part (31) of the lumbar support (3), and the fourth drive rod (63) is threadedly connected to the connecting bracket (51). When the fourth drive rod (63) rotates, it can drive the connecting bracket (51) to move the massage mechanism (5) back and forth.

7. The lumbar support adjustment structure according to claim 6, characterized in that: The first drive mechanism (6) also includes a third drive rod (61), which is rotatably mounted on the waist support (3). A first bevel gear (62) is provided on the third drive rod (61), and a second bevel gear (64) is provided on the fourth drive rod (63). The first bevel gear (62) and the second bevel gear (64) mesh and drive each other.

8. The lumbar support adjustment structure according to claim 7, characterized in that: There are two fourth drive rods (63), which are arranged symmetrically on the left and right. Two first bevel gears (62) are provided on the third drive rod (61), and the two first bevel gears (62) mesh with the second bevel gears (64) on the two fourth drive rods (63) respectively.

9. The lumbar support adjustment structure according to claim 7, characterized in that: The handle (65) is mounted on the third drive rod (61), and one end of the handle (65) extends from the mounting base (23).

10. A chair, characterized in that: The lumbar support adjustment structure includes any one of claims 1-9 above.

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