Lumbar support adjustment mechanism for chair, lumbar support and chair

Abstract

Disclosed in the present application are a lumbar support adjustment mechanism for a chair, a lumbar support and a chair. The lumbar support adjustment mechanism comprises: a mounting base, used for connecting to a backrest of a chair; a lumbar support driving mechanism, arranged on the mounting base; and a movable base, used for fixedly connecting to the lumbar support, wherein the lumbar support driving mechanism comprises a lumbar support driving motor and a lead screw nut transmission mechanism, and the lumbar support driving motor is connected to the movable base by means of the lead screw nut transmission mechanism and drives the movable base to reciprocate in a set direction. Using the present application can accurately control the number of rotations of the driving motor, such that the moving distance of the movable base can be precisely controlled, and the movable base can stay in any position on a moving stroke. In this way, users can accurately adjust lumbar supports to expected positions according to their own needs.

Description

Lumbar support adjustment mechanism for seats, lumbar support and seats Technical Field

[0001] This application relates to the field of seat technology, specifically to a lumbar support adjustment mechanism, lumbar support, and seat for use in a seat. Background Technology

[0002] To improve user comfort, related technologies include lumbar support on the seat back, with a common solution being to fix the lumbar support to the seat back. Technical issues

[0003] Because the lumbar support position cannot be adjusted, it is difficult for users to find a comfortable posture when using this type of seat. Some solutions do have lumbar support that can be adjusted relative to the seat, but these are generally set to manual adjustment with multiple settings, requiring multiple manual adjustments, which is not very convenient. In addition, since the lumbar support position is fixed in each setting, and there is a certain distance between adjacent settings, it is difficult to adjust the lumbar support to the optimal state for supporting the lower back. Technical solutions

[0004] The purpose of this application is to provide a lumbar support adjustment mechanism, lumbar support, and seat for use in a chair, which allows users to easily adjust the position of the lumbar support according to their own needs.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] The lumbar support adjustment mechanism for the seat includes:

[0007] Mounting bracket for connection to the back of the seat;

[0008] A lumbar support drive mechanism, which is disposed on the mounting base; and,

[0009] A movable seat, which is used to be fixedly connected to the lumbar support;

[0010] The lumbar support drive mechanism includes a lumbar support drive motor and a lead screw and nut transmission mechanism. The lumbar support drive motor is connected to the movable seat through the lead screw and nut transmission mechanism and drives the movable seat to reciprocate along a set direction.

[0011] Preferably, the lead screw and nut transmission mechanism includes a lead screw, a nut sleeve, and a connecting cylinder. The lead screw is connected to the output shaft of the waist support drive motor and is driven to rotate by the waist support drive motor. The nut sleeve is sleeved outside the lead screw, and the two are threadedly connected. The connecting cylinder is sleeved outside the nut sleeve, and the two are fixedly connected. The connecting cylinder is configured to cooperate with an external structure to restrict the rotation of the nut sleeve, and the connecting cylinder is connected to a movable seat.

[0012] Preferably, the waist support driving motor is arranged perpendicularly to the set direction, an output shaft of the waist support driving motor is fixedly provided with a driving bevel gear, the transmission screw rod is fixedly provided with a transmission bevel gear, and the driving bevel gear is in meshing transmission with the transmission bevel gear.

[0013] Preferably, the connecting barrel and the movable seat are movably connected through a connecting shaft body penetrating through the two in a horizontal direction, and an axial direction of the connecting shaft body is perpendicular to the set direction; the waist support adjusting mechanism further comprises an elastic member arranged between the connecting barrel and the movable seat, and two ends of the elastic member press against the connecting barrel and the movable seat respectively.

[0014] Preferably, the connecting barrel is formed with a first mounting groove, the movable seat is formed with a second mounting groove, the elastic member is a compression spring, and two ends of the compression spring are arranged in the first mounting groove and the second mounting groove respectively, and the two ends of the compression spring abut against and press against a bottom wall of the first mounting groove and a bottom wall of the second mounting groove respectively.

[0015] In addition, in order to achieve the above-mentioned purpose, the application also adopts the following technical scheme:

[0016] The waist support comprises a waist support body and the waist support adjusting mechanism as any one of the above technical schemes, and the waist support adjusting mechanism is connected with the waist support body through the movable seat.

[0017] Preferably, the waist support body is formed with a concave cavity, the waist support body is provided with a through hole in a bottom wall of the concave cavity, the movable seat is arranged in the concave cavity and fixedly arranged on the bottom wall of the concave cavity, the mounting seat is arranged at a rear portion of the waist support body and outside the concave cavity, and the waist support driving mechanism is connected with the movable seat through the through hole.

[0018] Preferably, the waist support further comprises: an elastic cover arranged on the waist support body and cooperating with the concave cavity to form a mounting cavity; a massage assembly arranged in the mounting cavity and having an extended position and a retracted position relative to the waist support body; a massage assembly driving mechanism arranged in the mounting cavity and connected with the massage assembly; and a controller connected with the massage assembly driving mechanism and used to control the massage assembly driving mechanism to work, so as to drive the massage assembly to switch between the extended position and the retracted position; wherein the massage assembly pushes against the elastic cover when the massage assembly is in the extended position, and there is a gap between the massage assembly and the elastic cover when the massage assembly is in the retracted position.

[0019] Preferably, the waist support further comprises a sliding seat arranged in the mounting cavity, the sliding seat is slidingly arranged on the movable seat, and the massage assembly is fixedly arranged on the sliding seat.

[0020] Preferably, the massage assembly driving mechanism comprises a massage assembly driving motor and a connecting block fixedly arranged on the waist support body, an output shaft of the massage assembly driving motor is provided with a threaded screw rod segment, the connecting block is provided with an internal thread matched with the threaded screw rod segment, the threaded screw rod segment is inserted into the connecting block and threadedly matched with the connecting block, and a body of the massage assembly driving motor is fixedly arranged on the sliding seat.

[0021] Preferably, the waist support further comprises a detection element arranged in the mounting cavity, the controller is connected with the detection element and obtains position information of the massage assembly through the detection element, and the controller controls the massage assembly driving motor to work to drive the massage assembly to switch from the retracted position to the extended position through the position information.

[0022] In addition, in order to achieve the above object, the application also adopts the following technical scheme:

[0023] The seat comprises the waist support adjusting mechanism according to any one of the above technical schemes, or the seat comprises the waist support according to any one of the above technical schemes. Beneficial effects

[0024] Compared with the prior art, the application has the beneficial effects that:

[0025] By arranging the waist support driving mechanism to drive the movable seat to move, the movable seat drives the waist support fixedly connected with the movable seat to move synchronously, and the position adjustment of the waist support is realized. Since the screw rod nut transmission mechanism is arranged to drive the movable seat to move, the rotation number of the waist support driving motor can be accurately controlled, the moving distance of the movable seat can be accurately controlled, and the movable seat can stop at any position on the moving stroke. In this way, the user can accurately adjust the waist support to the expected position according to the needs. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 is a structural schematic view of a waist support adjusting mechanism for a seat according to an embodiment of the application;

[0027] Fig. 2 is an exploded view of the waist support adjusting mechanism;

[0028] Fig. 3 is a sectional view of the waist support adjusting mechanism;

[0029] Fig. 4 is a structural schematic view of a waist support provided with the waist support adjusting mechanism;

[0030] Fig. 5 is a schematic view of the waist support provided with the waist support adjusting mechanism from another perspective;

[0031] Fig. 6 is an exploded view of the waist support;

[0032] Fig. 7 is a sectional view of the waist support except the waist support body;

[0033] Fig. 8 is an enlarged view of part A in Fig. 7;

[0034] Fig. 9 is a partial sectional view of the lumbar support when the massage assembly is in the retracted position;

[0035] Fig. 10 is an enlarged view of part B in Fig. 9;

[0036] Fig. 11 is a partial sectional view of the lumbar support when the massage assembly is in the extended position;

[0037] Fig. 12 is an enlarged view of part C in Fig. 11;

[0038] Fig. 13 is a schematic view of the lumbar support being mounted on the seat back of the seat.

[0039] Wherein, 1, mounting seat; 10, main shell; 100, first positioning groove; 11, mounting plate; 2, lumbar support driving mechanism; 20, lumbar support driving motor; 21, transmission screw; 22, nut sleeve; 23, connecting cylinder; 230, first mounting groove; 231, connecting hole; 24, connecting frame; 240, first circuit board; 3, movable seat; 30, second mounting groove; 31, sliding groove; 32, guide sliding rail; 320, second circuit board; 4, elastic member; 5, lumbar support body; 50, concave cavity; 51, perforation; 6, massage assembly; 60, shell; 61, clamping section; 62, massage head; 7, massage assembly driving mechanism; 70, massage assembly driving motor; 700, threaded screw section; 71, connecting block; 710, threaded sleeve; 8, sliding seat; 80, main seat; 800, sliding block part; 801, second positioning groove; 81, cover; 810, third positioning groove; 9, seat back. Embodiments of the application

[0040] Hereinafter, the present application will be further described with reference to the drawings and specific embodiments, it should be noted that, in the absence of conflict, the following described embodiments or between the technical features can be any combination to form a new embodiment. Except for the special description, the materials and equipment used in the embodiments can be purchased from the market. The examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0041] In the description of the present application, it needs to be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically specified and limited.

[0042] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "connected", "communicated", "connected" should be understood in a broad sense, for example, it can be fixedly connected, it can be connected through an intermediate medium, it can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] The embodiment provides a lumbar support adjusting mechanism for a seat, which can adjust the position of the lumbar support arranged on the seat. As shown in FIG. 1, FIG. 2 and FIG. 3, the lumbar support adjusting mechanism comprises a mounting seat 1, a lumbar support driving mechanism 2 and a movable seat 3. As shown in FIG. 13, the mounting seat 1 is used to be connected with the backrest 9 of the seat, and as shown in FIG. 4, the movable seat 3 is used to be fixedly connected with the lumbar support. That is, when the lumbar support adjusting mechanism is applied, the mounting seat 1 is mounted to the backrest 9 of the seat, and the movable seat 3 is mounted to the lumbar support of the seat. The lumbar support driving mechanism 2 in the embodiment is arranged on the mounting seat 1, and the lumbar support driving mechanism 2 comprises a lumbar support driving motor 20 and a screw nut transmission mechanism, the lumbar support driving motor 20 is connected with the movable seat 3 through the screw nut transmission mechanism and drives the movable seat 3 to move back and forth in a set direction.

[0044] By arranging the lumbar support driving mechanism 2 to drive the movable seat 3 to move, and then driving the lumbar support fixedly connected with the movable seat 3 to move synchronously through the movable seat 3, the position adjustment of the lumbar support is realized. Since the screw nut transmission mechanism is adopted to drive the movable seat 3 to move, the moving distance of the movable seat 3 can be accurately controlled by accurately controlling the number of rotations of the lumbar support driving motor 20, and the movable seat 3 can stop at any position on the moving stroke. In this way, the user can accurately adjust the lumbar support to the desired position according to the needs.

[0045] Specifically, as shown in FIG. 2 and FIG. 3, the mounting seat 1 in the embodiment includes a main housing 10 and a mounting plate 11 arranged on the main housing 10, the main housing 10 includes two half housings fixedly mounted together, and a first positioning groove 100 is formed between the two half housings (i.e. inside the main housing 10) after assembly, and the lumbar support driving motor 20 in the lumbar support driving mechanism 2 is positioned in the first positioning groove 100. The mounting plate 11 is used for mounting with the chair back 9, and the mounting plate 11 can be fixedly mounted on the chair back 9 or adjustably mounted on the chair back 9, which will not be described here.

[0046] The screw nut transmission mechanism in the embodiment includes a transmission screw rod 21, a nut sleeve 22 and a connecting cylinder 23, the transmission screw rod 21 is connected with the output shaft of the lumbar support driving motor 20 and rotates under the driving of the lumbar support driving motor 20, the nut sleeve 22 is sleeved outside the transmission screw rod 21 and threadedly drives the transmission screw rod 21. The connecting cylinder 23 is sleeved outside the nut sleeve 22 and fixedly connected with the nut sleeve 22, the connecting cylinder 23 is configured to be able to cooperate with an external structure to limit the rotation of the nut sleeve 22, and the connecting cylinder 23 is connected with the movable seat 3. Through the above arrangement, when the lumbar support driving motor 20 works, the transmission screw rod 21 can be driven to rotate, and since the nut sleeve 22 is limited and cannot rotate, the nut sleeve 22 reciprocates along its axial direction under the driving of the thread transmission. It is easy to understand that the setting direction is the axial direction of the transmission screw rod 21 or the nut sleeve 22.

[0047] As shown in FIG. 3, the lumbar support driving motor 20 in the embodiment is arranged perpendicular to the setting direction, the output shaft of the lumbar support driving motor 20 is fixedly provided with a driving bevel gear, the transmission screw rod 21 is fixedly provided with a transmission bevel gear, and the driving bevel gear and the transmission bevel gear are in meshing transmission. Through the above arrangement, the length direction of the lumbar support driving motor 20 can be arranged perpendicular to the setting direction, which can reduce the occupied space of the lumbar support driving motor 20 along the setting direction. In combination with FIG. 13, if the spacing between the lumbar support and the chair back 9 along the setting direction is too large, the user's back cannot normally lean on the chair back 9 when the lumbar support leans against the waist, which reduces the user's comfort. Therefore, through the above arrangement of the lumbar support driving motor 20, the occupied space of the lumbar support driving motor 20 along the setting direction can be reduced, and thus the spacing between the lumbar support and the chair back 9 can meet the design requirements. On this basis, the lumbar support driving motor 20 can also select a motor with slightly larger power, which can obtain greater power. Through the cooperation of the driving bevel gear and the transmission bevel gear, on the one hand, the transmission direction can be changed, and on the other hand, the transmission torque can be increased through the transmission ratio design.

[0048] When the user sits on the seat, it is not possible to maintain a fixed posture for a long time. If the waist support is rigidly connected to the connecting cylinder 23, the fixed waist support will cause the user to feel uncomfortable when changing the posture. For example, if the waist support can fit the user's waist when the user is in a straight sitting posture, when the waist support is rigidly connected to the connecting cylinder 23, the waist support is difficult to fit the user's waist when the user changes to a reclining posture. In the embodiment, the waist support has a certain degree of freedom relative to the connecting cylinder 23, and still achieves the purpose of reciprocating movement of the waist support driven by the connecting cylinder 23. Specifically, in combination with the connecting cylinder 23 and the movable seat 3 shown in FIGS. 2 and 3, the connecting cylinder 23 and the movable seat 3 are movably connected by a connecting shaft body penetrating both in the horizontal direction, and the axis of the connecting shaft body is perpendicular to the set direction. Through the above setting, the movable seat 3 and the waist support fixedly installed on the movable seat 3 can swing relative to the connecting cylinder 23 around the set axis of the connecting shaft body. In this way, when the user changes the posture, the waist support can adaptively swing to always fit the user's waist, improving the comfort of use.

[0049] Specifically, in the embodiment, connecting holes 231 are provided on the connecting cylinder 23 and the movable seat 3, and the connecting shaft body penetrates the connecting holes 231. The connecting shaft body described above is a mother-son screw or a mother-son nail, and the diameter size is slightly smaller than the inner diameter size of the connecting hole 231.

[0050] Of course, if the movable seat 3 and the waist support fixedly installed thereon are movable relative to the connecting cylinder 23 in the normal state, the supporting effect of the waist support on the user's waist will be reduced. Therefore, when the connecting shaft body is arranged as described above, a resilient member 4 is also arranged between the connecting cylinder 23 and the movable seat 3, and the two ends of the resilient member 4 are pressed against the connecting cylinder 23 and the movable seat 3, respectively. In this way, through the pressing action of the resilient member 4, the movable seat 3 and the waist support fixedly installed thereon can be kept stable relative to the connecting cylinder 23 in the normal state. When the user changes the posture and applies a large force to the waist support, the waist support will adaptively adjust the position.

[0051] Specifically, in the embodiment, a first mounting groove 230 is formed in the connecting cylinder 23, a second mounting groove 30 is formed in the movable seat 3, and the resilient member 4 is a compression spring. The two ends of the compression spring are arranged in the first mounting groove 230 and the second mounting groove 30, respectively, and the two ends of the compression spring abut against and press against the bottom wall of the first mounting groove 230 and the bottom wall of the second mounting groove 30, respectively.

[0052] In some alternative embodiments, a connecting frame 24 can be arranged outside the connecting cylinder 23, the connecting frame 24 is sleeved outside the connecting cylinder 23, and the inner wall of the connecting frame 24 can limit the connecting cylinder 23, thereby limiting the nut sleeve 22, so that the connecting cylinder 23 and the nut sleeve 22 can only move along the axial direction of the transmission screw rod 21 and cannot rotate. Another purpose of arranging the connecting frame 24 is to facilitate the start-stop control of the waist support driving motor 20, and a first circuit board 240 for transmitting control signals is also needed, and the first circuit board 240 can be conveniently installed on the first connecting frame 24 by arranging the connecting frame 24. The first connecting frame 24 can be fixedly installed on the mounting seat 1 by screws or other connecting members.

[0053] The waist support adjusting mechanism provided by the embodiment can be applied to a waist support. As shown in FIGS. 4 and 5, the waist support includes a waist support body 5, and the waist support adjusting mechanism is connected with the waist support body 5 through the movable seat 3. Specifically, the movable seat 3 is locked on the waist support body 5 by screws.

[0054] As shown in FIG. 6, the waist support body 5 in the embodiment is formed with a concave cavity 50, and the waist support body 5 is provided with a through hole 51 at the bottom wall of the concave cavity 50. The movable seat 3 is located in the concave cavity 50 and is fixedly arranged at the bottom wall of the concave cavity 50. The mounting seat 1 is located at the rear of the waist support body 5 and outside the concave cavity 50, and the waist support driving mechanism 2 is connected with the movable seat 3 through the through hole 51. The external structure mentioned in the foregoing description that the connecting cylinder 23 is configured to be capable of cooperating with the external structure to limit the rotation of the nut sleeve 22 is the inner annular wall of the through hole 51. The connecting frame 24 is limited by the inner annular wall of the through hole 51, thereby limiting the connecting sleeve and the nut sleeve 22, so that the nut sleeve 22 and the connecting cylinder 23 can only move in a certain direction and cannot rotate. Of course, in some alternative embodiments, the connecting frame 24 can not be arranged, and the connecting cylinder 23 is directly limited by the inner annular wall of the through hole 51. Correspondingly, the first circuit board 240 is arranged by other schemes, for example, the first circuit board 240 can be arranged in the mounting seat 1 together with the waist support driving motor 20.

[0055] The lumbar support in the embodiment comprises a lumbar support body 5, an elastic cover (not shown in the figure), a massage assembly 6, a massage assembly driving mechanism 7 and a controller (not shown in the figure). The lumbar support body 5 is formed with a concave cavity 50, and the elastic cover is arranged on the lumbar support body 5 and cooperates with the concave cavity 50 to form a mounting cavity. Specifically, the elastic cover can be made of leather material with elasticity, or made of cotton material with elasticity, or made of mesh cloth form with elasticity, etc.; the elastic cover can also be a thick elastic pad, such as a rubber pad or a sponge pad, and the above-mentioned leather material, cotton material, etc. can also be sewn on the outside of the rubber pad or the sponge pad. The elastic cover can be directly sewn at the opening of the concave cavity 50, so that the elastic cover directly covers the concave cavity 50 and cooperates with it to form the mounting cavity. Alternatively, the elastic cover can also wrap the entire lumbar support body 5, and the part of the elastic cover covering the concave cavity 50 cooperates with the concave cavity 50 to form the mounting cavity. It is easy to understand that the above-mentioned covering is not necessarily completely closed, as described above, the elastic cover can be a mesh cloth.

[0056] As shown in FIGS. 9, 10, 11 and 12, the massage assembly 6 and the massage assembly driving mechanism 7 are arranged in the mounting cavity, wherein the massage assembly 6 has an extended position and a retracted position relative to the lumbar support body 5, the massage assembly driving mechanism 7 is connected with the massage assembly 6, the controller is connected with the massage assembly driving mechanism 7, and the massage assembly driving mechanism 7 can be controlled to work (start-stop control) through the controller, and the massage assembly 6 is switched between the extended position and the retracted position through the massage assembly driving mechanism 7. The massage assembly 6 pushes against the elastic cover when it is in the extended position, and there is a gap between the massage assembly 6 and the elastic cover when the massage assembly 6 is in the retracted position. It is easy to understand that there is a gap between the massage assembly 6 and the elastic cover when the massage assembly 6 is in the retracted position, that is, the massage assembly 6 does not press the elastic cover when it is in the retracted position. When the massage assembly 6 is in the extended position, the massage assembly 6 abuts against the elastic cover, that is, the massage assembly 6 presses the elastic cover to deform the elastic cover when it is in the extended position. From the outside, the user can see that part of the elastic cover is raised and protrudes by the massage assembly 6.

[0057] The lumbar support provided in the embodiment forms a mounting cavity on the lumbar support body 5, assembles the massage assembly 6 and the massage assembly driving mechanism 7 by using the mounting cavity, and drives the lumbar support body 5 to switch between the retracted position and the extended position by using the massage assembly driving mechanism 7. In this way, when the user does not need massage, the massage assembly 6 can be retracted into the mounting cavity without pressing against the user's back, improving the user's comfort. When the user needs massage, the massage assembly 6 can be switched to the extended position to perform normal massage.

[0058] Further, the lumbar support in the embodiment further comprises a detection element arranged in the mounting cavity, and the controller is connected with the detection element and obtains the position information of the massage assembly 6 through the detection element. The controller controls the massage assembly driving motor 70 to work through the position information, so as to drive the massage assembly 6 to switch from the retracted position to the extended position. Through the detection element, the position information of the massage assembly 6 can be obtained, so that it can be judged whether the massage assembly 6 is in the extended position, and then the controller can control the start and stop of the massage assembly driving mechanism 7. In the embodiment, the detection element comprises an inductive magnet (not shown in the figure) and a Hall sensor (not shown in the figure) matched with the inductive magnet, the inductive magnet is configured to move synchronously with the massage assembly 6, and the position of the Hall sensor is configured to enable the inductive magnet to induct the Hall sensor when the massage assembly 6 is in the extended position. The specific arrangement mode of the inductive magnet and the Hall sensor will be described later.

[0059] As shown in FIGS. 6 and 7, the massage assembly driving mechanism 7 in the embodiment comprises a massage assembly driving motor 70 and a transmission mechanism, the output shaft of the massage assembly driving motor 70 is provided with a threaded screw rod segment 700, the transmission mechanism comprises a connecting block 71 fixedly arranged on the lumbar support body 5, the connecting block 71 is provided with a threaded sleeve 710 matched with the threaded screw rod segment 700, the threaded screw rod segment 700 is inserted into the threaded sleeve 710 in the connecting block 71 and threadedly matched with the threaded sleeve 710, and the body of the massage assembly driving motor 70 is fixedly arranged relative to the massage assembly 6 and moves synchronously with the massage assembly 6. That is, when the massage assembly driving motor 70 works, the output shaft of the massage assembly driving motor 70 rotates, and the threaded screw rod segment 700 rotates accordingly. Since the threaded screw rod segment 700 is threadedly matched with the connecting block 71, and the connecting block 71 is fixedly arranged on the lumbar support body 5, the threaded screw rod segment 700 moves axially while rotating. In this way, the threaded screw rod segment 700 synchronously drives the body of the massage assembly driving motor 70 and the massage assembly 6 fixedly arranged relative to the body of the massage assembly driving motor 70 to move.

[0060] It is easy to understand that in other alternative embodiments, the linear driver can also be directly selected as the massage assembly driving mechanism 7, and the massage assembly 6 can be directly driven to move by the output shaft of the linear driver to achieve the switching of the massage assembly 6 between the extended position and the retracted position. Alternatively, in alternative embodiments, the massage assembly driving mechanism 7 still includes the massage assembly driving motor 70 and the transmission mechanism in this embodiment, but the massage assembly driving motor 70 is fixedly installed on the waist support body 5, and the connecting block 71 is fixedly installed (the connecting block 71 is movably arranged relative to the waist support body 5) with the massage assembly 6. Thus, when the massage assembly driving motor 70 works, the connecting block 71 can be driven to move the massage assembly 6 by the cooperation of the threaded screw rod segment 700 and the connecting block 71, and the switching of the massage assembly 6 between the extended position and the retracted position can also be achieved. However, the design of the massage assembly driving mechanism 7 provided in this embodiment has the following advantages: for the seat product, due to the design of the size, when the massage assembly driving mechanism 7 is arranged in the waist support body 5, it is necessary to reduce the design size as much as possible. When the linear driver is directly selected as the massage assembly driving mechanism 7 or the massage assembly driving motor 70 in the massage assembly driving mechanism 7 is fixedly designed, a larger protruding part needs to be formed at the rear of the waist support body 5 to install the linear driver or the massage assembly driving motor 70 which needs to be fixedly arranged. When the design of the massage assembly driving mechanism 7 in this embodiment is adopted, since the connecting block 71 only needs to form a threaded hole matched with the threaded screw rod segment 700, the size thereof can be smaller. The massage assembly driving motor 70 movably arranged relative to the waist support body 5 can fully utilize the space in the cavity 50 of the waist support body 5. Thus, the design size of the rear position of the waist support body 5 can be reduced as much as possible, which is convenient for the application to the seat.

[0061] In combination with FIGS. 9 and 11, the massage assembly driving motor 70 in this embodiment is designed such that when it rotates forward, the body of the massage assembly driving motor 70, the massage assembly 6, and the sliding seat 8 are all moved forward, so that the massage assembly 6 reaches the extended position; when the massage assembly driving motor 70 reverses, the body of the massage assembly driving motor 70, the massage assembly 6, and the sliding seat 8 are all moved backward, so that the massage assembly 6 reaches the retracted position.

[0062] As shown in FIGS. 6, 7, and 8, the waist support in this embodiment further includes a sliding seat 8 slidably arranged on the movable seat 3, and the massage assembly driving motor 70 and the massage assembly 6 are fixedly arranged on the sliding seat 8. Thus, when the massage assembly driving motor 70 works, the body of the massage assembly driving motor 70, the massage assembly 6, and the sliding seat 8 can all slide relative to the movable seat 3.

[0063] Further, the sliding groove 31 is formed on the movable seat 3, and the sliding block part 800 is formed on the sliding seat 8 and matched with the sliding groove 31. The second positioning groove 801 is formed on the sliding block part 800, and the body of the massage assembly driving motor 70 is positioned in the second positioning groove 801. Through the above design, the sliding stability of the body of the massage assembly driving motor 70, the massage assembly 6 and the sliding seat 8 can be further increased. Further, the guide slide rail 32 can be arranged on the side wall of the sliding groove 31, and the stability of the sliding seat 8 in the sliding process can be increased by using the guide slide rail 32.

[0064] Specifically, the sliding seat 8 in the embodiment includes the main seat 80 fixedly installed on the movable seat 3 and the cover 81 fixedly connected to the main seat 80. The cover 81 is threadedly fastened to the main seat 80 by screws, and of course, the cover 81 can also be clamped to the main seat 80 by a buckle structure. The third positioning groove 810 is formed between the cover 81 and the main seat 80. The massage assembly 6 includes the shell 60 having the clamping segment 61 matched with the third positioning groove 810. The massage assembly 6 is clamped into the third positioning groove 810 by the clamping segment 61 and fixed to the sliding seat 8. The sliding block part 800 is formed on the main seat 80, and the massage assembly driving motor 70 is positioned in the second positioning groove 801 formed on the sliding block part 800. The shell of the massage assembly driving motor 70 is locked and fixed to the sliding block part 800 by screws.

[0065] The sliding groove 31 formed on the movable seat 3 has a bottom wall and side walls on both sides of the bottom wall, and the guide slide rail 32 is arranged on the side walls. The detection element is arranged between the side wall of the sliding groove 31 and the sliding block part 800. Specifically, the induction magnet in the detection element is arranged on the sliding block part 800, and the Hall sensor in the detection element is arranged on the second circuit board 320. The second circuit board 320 is fixed and locked on the guide slide rail 32 on the side wall of the sliding groove 31 by screws. The Hall sensor is electrically connected to the controller through the second circuit board 320.

[0066] The massage assembly 6 in the embodiment further comprises the massage heads 62 arranged on the shell 60, the controller is electrically connected with the massage heads 62 and can control the massage heads 62 to work. Specifically, the massage heads 62 are arranged in two, and the two massage heads 62 are symmetrically distributed on the two sides of the clamping section 61. It should be noted that the controller in the embodiment can control the massage assembly driving mechanism 7 to work, and can also control the massage assembly 6 to work. In some optional embodiments, different controllers can also be arranged to control the massage assembly driving mechanism 7 and the massage assembly 6 to work respectively, and only the different controllers need to be electrically connected to transmit control signals. Alternatively, the controller can also serve as the controller of the whole seat, that is, the seat can be designed to have more functions, such as seat cushion heating, cooling and the like. The seat as a whole is provided with a controller, which can be used to control the aforementioned massage assembly driving mechanism 7 and massage assembly 6, and can also control other functions of the seat, such as heating, cooling function modules.

[0067] As shown in FIG. 13, the lumbar support adjusting mechanism provided by the embodiment can also be directly used for a seat, which comprises a seat back 9 and a lumbar support arranged on the seat back 9, and the lumbar support adjusting mechanism is arranged between the seat back 9 and the lumbar support. The lumbar support can be a common lumbar support only having a waist support function, or can be the lumbar support with the massage function as described above in the embodiment.

[0068] Finally, it should be noted that the above-mentioned embodiments are only optional embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and substitutions made by those skilled in the art on the basis of the present application shall fall within the scope of protection of the present application.

Claims

1. A lumbar support adjustment mechanism for a seat, characterised in that, The lumbar support adjusting mechanism comprises: a mounting seat for connecting with a backrest of the seat; a lumbar support driving mechanism arranged in the mounting seat; and a movable seat for fixedly connecting with the lumbar support; wherein the lumbar support driving mechanism comprises a lumbar support driving motor and a screw-nut transmission mechanism, the lumbar support driving motor is connected with the movable seat through the screw-nut transmission mechanism and drives the movable seat to move back and forth along a set direction.

2. The lumbar support adjustment mechanism of claim 1, wherein, The screw-nut transmission mechanism comprises a transmission screw rod, a nut sleeve and a connecting cylinder, the transmission screw rod is connected with an output shaft of the lumbar support driving motor and rotates under the driving of the lumbar support driving motor, the nut sleeve is sleeved on the transmission screw rod and the two are threadedly engaged; the connecting cylinder is sleeved on the nut sleeve and the two are fixedly connected, the connecting cylinder is configured to be able to cooperate with an external structure to limit the rotation of the nut sleeve, and the connecting cylinder is connected with the movable seat.

3. The lumbar support adjustment mechanism of claim 2, wherein, The lumbar support driving motor is arranged perpendicular to the set direction, the output shaft of the lumbar support driving motor is fixedly provided with a driving bevel gear, the transmission screw rod is fixedly provided with a transmission bevel gear, and the driving bevel gear is in meshing transmission with the transmission bevel gear.

4. The lumbar support adjustment mechanism of claim 2, wherein, The connecting cylinder and the movable seat are movably connected through a connecting shaft body penetrating the two along a horizontal direction, and the axial direction of the connecting shaft body is perpendicular to the set direction; The lumbar support adjusting mechanism further comprises a resilient member arranged between the connecting cylinder and the movable seat, and the two ends of the resilient member press against the connecting cylinder and the movable seat respectively.

5. The lumbar support adjustment mechanism of claim 4, wherein, The connecting cylinder is formed with a first mounting groove, the movable seat is formed with a second mounting groove, the resilient member is a compression spring, the two ends of the compression spring are placed in the first mounting groove and the second mounting groove respectively, and the two ends of the compression spring abut against and press against the bottom wall of the first mounting groove and the bottom wall of the second mounting groove respectively.

6. Lumbar support, characterized in that The lumbar support comprises a lumbar support body and the lumbar support adjusting mechanism as claimed in any one of claims 1 to 5, and the lumbar support adjusting mechanism is connected with the lumbar support body through the movable seat.

7. The lumbar support of claim 6 wherein, The lumbar support body is formed with a recessed cavity, and the lumbar support body is provided with a through hole in the bottom wall of the recessed cavity, the movable seat is located in the recessed cavity and is fixedly arranged on the bottom wall of the recessed cavity, the mounting seat is located at the rear of the lumbar support body and is located outside the recessed cavity, and the lumbar support driving mechanism is connected with the movable seat through the through hole.

8. The lumbar support of claim 7, wherein, The lumbar support further comprises: a resilient cover arranged on the lumbar support body and cooperating with the recessed cavity to form a mounting cavity; a massage assembly arranged in the mounting cavity and having an extended position and a retracted position relative to the lumbar support body; a massage assembly driving mechanism arranged in the mounting cavity and connected with the massage assembly; and a controller connected with the massage assembly driving mechanism and used to control the operation of the massage assembly driving mechanism to drive the massage assembly to switch between the extended position and the retracted position; wherein the massage assembly pushes against the resilient cover when it is in the extended position, and there is a gap between the massage assembly and the resilient cover when the massage assembly is in the retracted position.

9. The lumbar support of claim 8, wherein, The lumbar support further comprises a sliding seat arranged in the mounting cavity, the sliding seat is slidingly arranged on the movable seat, and the massage assembly is fixedly arranged on the sliding seat.

10. The lumbar support of claim 9, wherein, The massage assembly driving mechanism comprises a massage assembly driving motor and a connecting block fixedly arranged on the waist support body, an output shaft of the massage assembly driving motor is provided with a threaded screw rod segment, an inner thread matched with the threaded screw rod segment is arranged in the connecting block, the threaded screw rod segment is inserted into the connecting block and the two are threadedly matched, and a body of the massage assembly driving motor is fixedly arranged on the sliding seat.

11. The lumbar support of any one of claims 8 to 10, wherein, The waist support further comprises a detection element arranged in the mounting cavity, the controller is connected with the detection element and obtains position information of the massage assembly through the detection element, and the controller controls the massage assembly driving motor to work through the position information so as to drive the massage assembly to switch from the retracted position to the extended position.

12. A seat, characterized by The seat comprises the waist support adjusting mechanism according to any one of claims 1 to 5. Or, the seat comprises the waist support according to any one of claims 6 to 11.

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