Waist rest rotation adjusting device

Abstract

The utility model discloses a waist rest rotation adjusting device. The device comprises a back support; the upper end of the waist rest body is hinged to the back support, and a rotating mechanism is further arranged between the waist rest body and the back support; the rotating mechanism comprises a rotating supporting piece and a sliding piece, the sliding piece is slidably connected to the waist rest body in the vertical direction, one end of the rotating supporting piece is hinged to the lower end of the waist rest body, and the other end of the rotating supporting piece is hinged to the sliding piece; therefore, along with up-and-down sliding of the sliding piece, the rotating supporting piece pushes or pulls the lower end of the waist rest body, and therefore the waist rest body is driven to rotate front and back relative to the back support. According to the waist rest rotation adjusting device, the waist rest body rotates forwards and backwards around the upper end of the waist rest body, the lower portion of the waist rest body can push the waist of the user forwards while the upper portion of the waist rest body is attached to the waist of the user, and therefore the waist pushing effect of the waist rest body is guaranteed; in addition, the rotating mechanism is hidden between the waist rest body and the back support, so that the integrity and attractiveness of the appearance of the seat are improved.

Description

Technical Field

[0001] The utility model generally relates to the technical field of seats, and in particular to a lumbar support rotation adjustment device. Background Art

[0002] With the increasing incidence of lumbar spine disorders, maintaining lumbar health has become a common concern, especially for office workers who often sit for long periods of time. To prevent lumbar fatigue and outward lumbar curvature caused by prolonged sitting, existing chairs often incorporate a lumbar support in the backrest. When the user sits in the chair, the lumbar support fits and supports the user's lower back, assisting in correcting their sitting posture, effectively alleviating lumbar fatigue, and protecting the user's lower back health.

[0003] However, in actual application, different users have different requirements for the use of lumbar support. For office workers who sit for long periods of time, the lumbar support needs to be closer to the front to fit the waist and support the waist. For users who sit in a chair to relax and rest, the lumbar support needs to be a little looser and does not need a very obvious supporting effect.

[0004] In order to solve the above problems, the patent previously applied for by the inventor provides a multifunctional adjustable lumbar support (application number: CN202220799412.6). The lumbar support body is provided with a rotating part extending backward, and a corresponding support seat is provided on the back support body; the support seat and the rotating part are rotated together through a rotating shaft, so that the lumbar support body can be rotated to adjust the inclination angle to meet the usage needs of different users; and a locking adjustment member is further provided on the rotating shaft, and the locking adjustment member can be moved along the axial direction of the rotating shaft so that its locking pin is inserted into or exits the lock hole on the rotating part to lock or unlock the lumbar support body; and the control knob can be rotated and adjusted to squeeze the locking adjustment member to move; thereby, the rotation locking and unlocking functions of the lumbar support body can be achieved only by rotating the control knob, and the operation is very convenient.

[0005] However, the above solution has the following problems: the rotating shaft is set in the middle of the lumbar support body, so when the lower part of the lumbar support body rotates forward, the upper part of the lumbar support body will rotate backward instead, resulting in the upper part of the lumbar support body being unable to fit the user's waist, and the waist support effect is poor; not only that, the control knob is exposed on the outside of the support seat, which feels abrupt compared to the lumbar support body and the back support body, thereby affecting the integrity and aesthetics of the seat. Summary of the Invention

[0006] In view of the above-mentioned defects or shortcomings in the prior art, it is desired to provide a lumbar support rotation adjustment device. When the sliding part slides up and down, the rotating support part pushes or pulls the lower end of the lumbar support body, so that the lumbar support body rotates back and forth around its upper end, ensuring that the upper part of the lumbar support body fits the user's waist while the lower part of the lumbar support body can push the user's waist forward, thereby ensuring the lumbar support effect of the lumbar support body; and the rotating mechanism is hidden between the lumbar support body and the back support, thereby improving the integrity and aesthetics of the seat appearance.

[0007] The effect of the utility model is achieved in this way:

[0008] The embodiment of the present application provides a lumbar support rotation adjustment device, comprising:

[0009] Back support;

[0010] The lumbar support body has an upper end hinged to the back support, and a rotating mechanism is provided between the lumbar support body and the back support;

[0011] The rotating mechanism includes a rotating support and a sliding member. The sliding member is connected to the lumbar support body by sliding in the vertical direction. One end of the rotating support member is hinged to the lower end of the lumbar support body, and the other end of the rotating support member is hinged to the sliding member. Therefore, as the sliding member slides up and down, the rotating support member pushes or pulls the lower end of the lumbar support body, thereby driving the lumbar support body to rotate forward and backward relative to the back support. After the sliding member stops moving, it remains relatively fixed with the back support, and at the same time, the lumbar support body stays in the corresponding position.

[0012] Furthermore, a gear adjustment mechanism is provided between the sliding member and the back bracket, and the gear adjustment mechanism includes a gear groove provided on one of the sliding member and the back bracket, and a plurality of tooth grooves are provided on one side of the gear groove; the other of the sliding member and the back bracket is provided with a first elastic member, and a locking member is connected to one end of the first elastic member, and a clamping head that can be engaged with the tooth groove is provided on the locking member, and the first elastic member always applies elasticity to the locking member in the direction of the tooth groove; when the sliding member slides downward, the clamping head is engaged with the plurality of tooth grooves in sequence under the action of the elastic force of the first elastic member.

[0013] Furthermore, the sliding member is hollowed out to form a gear slot, with a plurality of tooth slots recessed into one side of the slot wall. The gear slot includes a gear reset portion extending vertically and a tooth slot recessed into one side of the gear reset portion. A gear adjustment portion is formed between the plurality of tooth slots. When the sliding member moves downward, the clamping head moves within the gear adjustment portion; when the sliding member moves upward, the clamping head moves within the gear reset portion. This makes the gear adjustment operation of the lumbar support body easier.

[0014] Furthermore, the tooth grooves are uniformly recessed obliquely downwards, facing away from the gear reset portion. This allows the clamping head to abut against the nearly horizontal portion of the tooth grooves when the user's back presses against the lumbar support body, thereby keeping the lumbar support body relatively fixed and stably supporting the user's waist, making gear adjustment easier.

[0015] Furthermore, the front end surface of the back bracket is recessed with a first mounting groove, and the first elastic member and the locking member are arranged in the first mounting groove, so that the connection between the first elastic member and the locking member and the back bracket is more stable, and the first elastic member and the locking member are prevented from detaching from the back bracket.

[0016] Furthermore, the two ends of the locking member distributed in the vertical direction are respectively a rotating end and a supporting end, with a clamping head provided at the rotating end. Fixed grooves are recessed in the first mounting groove and on two side walls opposite the rotating end and the supporting end. The locking member has switchable gear adjustment and gear reset states. The gear groove includes a gear adjustment portion having a tooth groove and a gear reset portion extending in the vertical direction. When the lumbar support body moves downward, the locking member is in the gear adjustment state, the supporting end abuts the fixed groove, and the rotating end can rotate left and right around the supporting end, allowing the clamping head to move within the gear adjustment portion. When the lumbar support body moves upward, the locking member is in the gear reset state, and both the rotating end and the supporting end abut the fixed groove, allowing the clamping head to move within the gear reset portion. This makes the adjustment operation of the gear adjustment mechanism more stable.

[0017] Furthermore, the end of the gear reset portion, near the top of the gear adjustment portion, is recessed upward to form a conversion portion. When the slider moves downward to its lowest position, the clamping head engages the conversion portion, driving the locking member to switch to the gear reset state, so that both the rotating end and the supporting end abut against the fixed groove. As a result, when the slider moves upward, the clamping head can move within the gear reset portion without being constrained by the gear adjustment portion. The provision of the conversion portion makes it easier for the locking member to switch between the gear adjustment state and the gear reset state.

[0018] Furthermore, the front end of the back support is covered with a cover plate, and the rear end of the cover plate is recessed with a vertically extending sliding support groove. The slider is disposed in the sliding support groove and can slide up and down along the sliding support groove. This allows the slider to be clamped between the cover plate and the back support, and the slider remains relatively fixed to the back support in the front-to-back direction, thereby improving the connection strength between the two.

[0019] Furthermore, the left and right sides of the sliding support groove are connected, and the left and right ends of the sliding member extend out of the sliding support groove. The left and right ends of the sliding member extend forward to form hinged portions, and the rear end of the rotating support member is hinged between the two hinged portions. This not only allows the sliding member to be clamped between the cover plate and the back support, ensuring the connection strength, but also allows the rotating support member to be hinged to the sliding member, ensuring the rotation and adjustment function of the lumbar support body.

[0020] Furthermore, a second elastic member is provided at the front end of the back support. The second elastic member acts on the bottom end of the slider, causing the slider to always slide upward relative to the back support. After the slider slides to its lowest position, it automatically returns to its initial position due to the elastic force of the second elastic member, thereby making the rotation and adjustment of the lumbar support body easier.

[0021] Furthermore, the left and right ends of the slider extend toward the left and right sides, respectively, to form adjustment portions configured for the user to adjust the slider. This allows the user to press the adjustment portions on either side to manipulate the slider up and down, thereby adjusting the rotation angle of the lumbar support body, further enhancing the convenience of the lumbar support body's rotation adjustment operation.

[0022] Furthermore, the rotating support member is a crank, and the middle portion of the rotating support member is bent upward.

[0023] The lumbar support rotation adjustment device provided by the present application comprises a three-link and one-slide mechanism formed between the back support, the lumbar support body, the rotation support member and the sliding member. The upper end of the lumbar support body is hinged to the back support and the rotation support member is hinged to the lower end of the lumbar support body, so that when the sliding member slides up and down, the rotation support member pushes or pulls the lower end of the lumbar support body, thereby causing the lumbar support body to rotate back and forth around its upper end, ensuring that the upper part of the lumbar support body fits the user's waist while the lower part of the lumbar support body can push the user's waist forward, thereby ensuring the lumbar support effect of the lumbar support body; and the rotation mechanism and the gear adjustment mechanism are hidden between the lumbar support body and the back support, so that in terms of appearance, the rotation mechanism and the gear adjustment mechanism are not easily exposed, thereby improving the integrity and aesthetics of the seat appearance; not only that, the rotation angle of the lumbar support body is adjusted by means of a clamping head and a plurality of tooth grooves, so that the lumbar support body can hover at any rotation angle, making the angle adjustment operation of the lumbar support body not only convenient but also having a gear sense. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0025] Figure 1 A schematic diagram of the three-dimensional structure of the lumbar support rotation adjustment device provided in an embodiment of the present application;

[0026] Figure 2 A schematic side view of the structure of the lumbar support rotation adjustment device provided by an embodiment of the present application when the lumbar support body is in the initial position;

[0027] Figure 3 A schematic side view of the structure of the lumbar support rotation adjustment device provided by an embodiment of the present application when the lumbar support body is rotated to the maximum position;

[0028] Figure 4 A schematic diagram of the connection structure between the lumbar support body and the back support provided in an embodiment of the present application;

[0029] Figure 5 A schematic cross-sectional view of the back support provided in an embodiment of the present application;

[0030] Figure 6 A schematic diagram of the connection structure between the sliding member and the cover plate provided in an embodiment of the present application;

[0031] Figure 7 A schematic diagram of the connection structure between the sliding member and the back support provided in an embodiment of the present application;

[0032] Figure 8 A front structural diagram of the gear adjustment mechanism in the initial position provided by an embodiment of the present application;

[0033] Figure 9 This is a front structural schematic diagram of the gear adjustment mechanism when the sliding member according to an embodiment of the present application slides downward;

[0034] Figure 10 This is a front structural schematic diagram of the gear adjustment mechanism provided by an embodiment of the present application when the sliding member slides to the lowest position;

[0035] Figure 11 A schematic diagram of the front structure of the locking member in the gear reset state provided by an embodiment of the present application;

[0036] Figure 12 This is a schematic diagram of the front structure of the locking member in the gear adjustment state provided in an embodiment of the present application.

[0037] The figures are marked as follows: 1-back bracket, 101-second mounting groove, 110-first elastic member, 120-locking member, 121-clamp, 122-rotating end, 123-supporting end, 124-second connecting groove, 125-limiting part, 130-first mounting groove, 131-fixing groove, 132-first connecting groove, 140-cover plate, 141-sliding support groove, 150-second elastic member, 2-lumbar support body, 210-rotating support member, 3-sliding member, 310-gear slot, 311-tooth groove, 312-gear reset part, 313-gear adjustment part, 314-conversion part, 320-hinge part, 330-adjustment part. DETAILED DESCRIPTION

[0038] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant utility model and are not intended to limit the utility model. It should also be noted that, for ease of description, only the portions relevant to the utility model are shown in the accompanying drawings.

[0039] Please refer to the attached Figure 1-12 , an embodiment of the present application provides a lumbar support rotation adjustment device, comprising:

[0040] Back support 1;

[0041] The lumbar support body 2 has its upper end hinged to the back support 1, and a rotation mechanism is provided between the lumbar support body 2 and the back support 1;

[0042] The rotating mechanism includes a rotating support 210 and a sliding member 3. The sliding member 3 is connected to the lumbar support body 2 in a sliding manner in the vertical direction. One end of the rotating support 210 is hinged to the lower end of the lumbar support body 2, and the other end of the rotating support 210 is hinged to the sliding member 3. Thus, a three-link and one-slide mechanism is formed between the back support 1, the lumbar support body 2, the rotating support 210 and the sliding member 3. As the sliding member 3 slides up and down, the rotating support 210 pushes or pulls the lower end of the lumbar support body 2, thereby driving the lumbar support body 2 to rotate forward and backward relative to the back support 1. When the sliding member 3 stops moving, it remains relatively fixed with the back support 1, and at the same time, the lumbar support body 2 stays in the corresponding position.

[0043] In this embodiment, the upper end of the lumbar support body 2 is hinged to the back bracket 1 and the rotating support member 210 is hinged to the lower end of the lumbar support body 2, so that when the sliding member 3 slides up and down, the rotating support member 210 pushes or pulls the lower end of the lumbar support body 2, thereby causing the lumbar support body 2 to rotate back and forth around its upper end, ensuring that the upper part of the lumbar support body 2 fits the user's waist while the lower part of the lumbar support body 2 can push the user's waist forward, thereby ensuring the waist-supporting effect of the lumbar support body 2; and, the rotating mechanism is hidden between the lumbar support body 2 and the back bracket 1, so that in appearance, the rotating mechanism is not easily exposed, thereby improving the integrity and aesthetics of the seat appearance.

[0044] After the sliding member 3 stops sliding, it remains relatively fixed with the back support 1. Please refer to the attached Figure 8-12In some embodiments of the present application, a gear adjustment mechanism is provided between the sliding member 3 and the back bracket 1, and the gear adjustment mechanism includes a gear slot 310 provided on one of the sliding member 3 and the back bracket 1, and a plurality of tooth slots 311 are provided on one side of the gear slot 310; the other of the sliding member 3 and the back bracket 1 is provided with a first elastic member 110, and one end of the first elastic member 110 is connected to a locking member 120, and a clamping head 121 that can be engaged with the tooth slot 311 is provided on the locking member 120, and the first elastic member 110 always applies elasticity to the locking member 120 in the direction of the tooth slot 311; when the sliding member 3 slides downward, the clamping head 121 is engaged with the plurality of tooth slots 311 in sequence under the action of the elastic force of the first elastic member 110.

[0045] Preferably, the gear slot 310 is provided with three tooth slots 311, that is, the lumbar support body 2 has three adjustable gears, so that the number of gears of the lumbar support body 2 is sufficient to meet the needs of various users. Of course, in other embodiments of the present application, the number of tooth slots 311 on the gear slot 310 can also be two, four, five, etc.

[0046] In this embodiment, the rotation angle of the lumbar support body 2 is adjusted by snapping together the clamping head 121 and the plurality of tooth grooves 311, so that the lumbar support body 2 can hover at any rotation angle, making the angle adjustment operation of the lumbar support body 2 not only convenient but also having a gear sense.

[0047] Of course, in other embodiments of the present application, the connection structure between the slider 3 and the back bracket 1 can also have other forms, such as opening a plurality of sockets on the front end surface of the back bracket 1, and setting pins on the slider 3 accordingly, and the slider 3 is fixed to the back bracket 1 by plug-in fitting, and the position of the slider 3 on the back bracket 1 can be adjusted by disassembling the slider 3 and plugging the slider 3 into other sockets, thereby driving the lumbar support body 2 to change the inclination angle; a plurality of slots can also be opened on the front end surface of the back bracket 1, and buckles can be set on the slider 3 accordingly, and the slider 3 is fixed to the back bracket 1 by snap-fit ​​fitting, and as the slider 3 slides, the buckles are sequentially engaged with the plurality of slots, so that the adjustment of the slider 3 has a better gear sense; the connection structure between the slider 3 and the back bracket 1 can also have a threaded screw structure, a ratchet structure, etc.

[0048] Please refer to the attached Figure 8-12In some embodiments of the present application, a gear groove 310 is hollowed out on the sliding member 3, and a plurality of tooth grooves 311 are recessed on the groove wall on one side of the gear groove 310. The gear groove 310 includes a gear reset portion 312 extending in the vertical direction and a tooth groove 311 recessed on one side of the gear reset portion 312. A gear adjustment portion 313 is formed between the multiple tooth grooves 311; when the sliding member 3 moves downward, the clamping head 121 moves in the gear adjustment portion 313; when the sliding member 3 moves upward, the clamping head 121 moves in the gear reset portion 312.

[0049] In this embodiment, the shift groove 310 is divided into a shift reset portion 312 and a shift adjustment portion 313. When adjusting the angle of the lumbar support body 2, the clamping head 121 moves within the shift adjustment portion 313 and engages with the plurality of tooth grooves 311 to achieve the shift adjustment. When the lumbar support body 2 is adjusted to the maximum angle, the clamping head 121 moves within the shift reset portion 312 (which does not have tooth grooves 311), allowing the lumbar support body 2 to easily return to its initial position. This makes the shift adjustment operation of the lumbar support body 2 more convenient.

[0050] Please refer to the attached Figure 8-10 In some embodiments of the present application, the tooth grooves 311 are uniformly recessed obliquely downward toward a side away from the gear reset portion 312 .

[0051] In this embodiment, the tooth grooves 311 are uniformly recessed downwardly toward the side away from the gear reset portion 312, so that when the user's back presses the lumbar support body 2, the sliding member 3 tends to move upward relative to the back support 1, and the clamping head 121 abuts against the horizontal portion of the tooth groove 311, so that the clamping head 121 cannot be separated from the tooth groove 311, so that the lumbar support body 2 can remain relatively fixed and thus stably support the user's waist; when the user presses the sliding member 3 down to adjust the gear, the clamping head 121 slides out along the inclined surface of the tooth groove 311 and slides into the next tooth groove 311, thereby completing the switching between gears, making the gear adjustment operation easier.

[0052] Please refer to the attached Figure 11-12 In some embodiments of the present application, a first mounting groove 130 is recessed on the front surface of the back support 1, and the first elastic member 110 and the locking member 120 are disposed in the first mounting groove 130. This makes the connection between the first elastic member 110 and the locking member 120 and the back support 1 more stable, and prevents the first elastic member 110 and the locking member 120 from detaching from the back support 1.

[0053] Among them, the right side of the first mounting groove 130 is recessed with a first connecting groove 132, and the right side of the locking member 120 is recessed with a second connecting groove 124. One end of the first elastic member 110 is connected to the first connecting groove 132, and the other end is connected to the second connecting groove 124. Thus, the first elastic member 110 can be stably set between the first mounting groove 130 and the locking member 120.

[0054] Preferably, the first elastic member 110 is a spring, which has good elasticity and strength, and is easy to install between the first connecting groove 132 and the second connecting groove 124. Of course, in other embodiments of the present application, the first elastic member 110 can also be a spring, rubber, etc.

[0055] Please refer to the attached Figure 11-12 In some embodiments of the present application, the two ends of the locking member 120 distributed in the vertical direction are respectively a rotating end 122 and a supporting end 123, the clamping head 121 is set at the rotating end 122, and the two side walls opposite to the rotating end 122 and the supporting end 123 in the first installation groove 130 are recessed with a fixing groove 131. The locking member 120 has a switchable gear adjustment state and a gear reset state. The gear slot 310 includes a gear adjustment portion 313 with a tooth groove 311 and a gear adjustment portion 313 extending in the vertical direction. The gear reset portion 312 is extended; when the lumbar support body 2 moves downward, the locking member 120 is in the gear adjustment state, the supporting end 123 abuts against the fixed groove 131, and the rotating end 122 can rotate left and right around the supporting end 123, so that the clamping head 121 moves in the gear adjustment portion 313; when the lumbar support body 2 moves upward, the locking member 120 is in the gear reset state, the rotating end 122 and the supporting end 123 both abut against the fixed groove 131, so that the clamping head 121 moves in the gear reset portion 312.

[0056] In this embodiment, the locking member 120 switches between the gear adjustment state and the gear reset state. In the gear adjustment state, the locking member 120 is pushed by the first elastic member 110, so that the clamping head 121 is pushed into the gear adjustment portion 313 and engages with the plurality of tooth grooves 311, and does not move along the gear reset portion 312 to cause the gear to be reset. In the gear reset state, both ends of the locking member 120 abut against the fixing grooves 131, so that the locking member 120 does not slide into the gear adjustment portion 313 under the push of the first elastic member 110, thereby allowing the clamping head 121 to move smoothly within the gear reset portion 312, and the slider 3 can slide to the initial position at one time, thereby achieving the reset of the lumbar support body 2. As a result, the adjustment operation of the gear adjustment mechanism is more stable.

[0057] Among them, the middle part of the locking member 120 protrudes in the direction away from the first elastic member 110 to form a limiting portion 125, which is a triangular protrusion. The angle formed by the upper edge of the limiting portion 125 and the left edge of the support end 123 is an obtuse angle, so that in the gear adjustment state, the angle between the triangular protrusion and the support end 123 and the angle formed by the fixing groove 131 and the first installation groove 130 abut against each other, thereby limiting the swing angle of the locking member 120 in the first installation groove 130.

[0058] Please refer to the attached Figure 8-10 In some embodiments of the present application, one end of the gear reset portion 312 close to the top of the gear adjustment portion 313 is recessed upward to form a conversion portion 314. When the sliding member 3 moves downward to the lowest position, the clamping head 121 is clamped into the conversion portion 314 and drives the locking member 120 to switch to the gear reset state, so that the rotating end 122 and the supporting end 123 are both abutted against the fixed groove 131, so that when the sliding member 3 moves upward, the clamping head 121 moves in the gear reset portion 312 and will not be constrained by the gear adjustment portion 313.

[0059] In this embodiment, when the slider 3 slides to its lowest position, the clamping head 121 slides from the uppermost tooth groove 311 into the conversion portion 314. Since the conversion portion 314 extends in a vertical direction, the clamping head 121 also becomes vertical after sliding in, thereby allowing the rotating end 122 to engage with the upper fixed groove 131, thereby switching the locking member 120 from the gear adjustment state to the gear reset state and allowing the locking member 120 to maintain the gear reset state while sliding within the gear reset portion 312. When the slider 3 slides to its initial position, when the user applies downward force to the slider 3, the bottom of the gear groove 310 pushes the clamping head 121, causing the rotating end 122 to disengage from the fixed groove 131. Under the elastic force of the first elastic member 110, the clamping head 121 re-engages the gear adjustment portion 313, thereby switching the locking member 120 from the gear reset state to the gear adjustment state. Therefore, by providing the conversion portion 314 , the switching of the locking member 120 between the gear adjustment state and the gear reset state is made easier.

[0060] Please refer to the attached Figure 4-6 In some embodiments of the present application, the front end of the back support 1 is covered with a cover plate 140. The rear end of the cover plate 140 is recessed with a vertically extending sliding support groove 141. The slider 3 is disposed in the sliding support groove 141 and can slide up and down along the sliding support groove 141. This allows the slider 3 to be clamped between the cover plate 140 and the back support 1, and the slider 3 remains relatively fixed to the back support 1 in the front-to-back direction, thereby improving the connection strength between the two.

[0061] Among them, the front end of the back bracket 1 is recessed to form a second mounting groove 101, and the sliding member 3 and the cover plate 140 are both arranged in the second mounting groove 101, which not only improves the connection strength between the sliding member 3 and the back bracket 1, but also prevents the sliding member 3 and the cover plate 140 from being exposed on the front end surface of the back bracket 1, making the three more compact and appearing more integrated in appearance.

[0062] The cover plate 140 is fixed to the front end of the back support 1 by screw connection, which not only makes the connection strength between the cover plate 140 and the back support 1 more reliable, but also makes the installation and removal operations of the cover plate 140 more convenient.

[0063] Please refer to the attached Figure 4-6 In some embodiments of the present application, the left and right sides of the sliding support groove 141 are provided through-holes. The left and right ends of the sliding member 3 extend out of the sliding support groove 141. The left and right ends of the sliding member 3 extending out of the sliding support groove 141 both extend forward to form hinged portions 320. The rear end of the rotating support member 210 is hinged between the two hinged portions 320. This not only clamps the sliding member 3 between the cover plate 140 and the back support 1, ensuring connection strength, but also enables the rotating support member 210 to be hinged to the sliding member 3, ensuring the rotation adjustment function of the lumbar support body 2.

[0064] Please refer to the attached Figure 8-10 In some embodiments of the present application, a second elastic member 150 is provided at the front end of the back support 1. The second elastic member 150 acts on the bottom end of the slider 3, causing the slider 3 to always have a tendency to slide upward relative to the back support 1. After the slider 3 slides to the lowest position, the slider 3 can automatically return to the initial position due to the elastic force of the second elastic member 150, thereby making the rotation adjustment operation of the lumbar support body 2 easier.

[0065] Please refer to the attached Figure 4-7 In some embodiments of the present application, the left and right ends of the slider 3 extend toward the left and right sides, respectively, to form adjustment portions 330. The adjustment portions 330 are configured to allow the user to adjust the slider 3. The user can press the adjustment portions 330 on either side to manipulate the slider 3 to slide up and down, thereby adjusting the rotation angle of the lumbar support body 2, further enhancing the convenience of the rotation adjustment operation of the lumbar support body 2.

[0066] Please refer to the attached Figure 1-3 In some embodiments of the present application, the rotating support member 210 is a crank, and the middle part of the rotating support member 210 is bent upward, so that the force of the sliding member 3 sliding up and down can be converted into a force pulling backward or pushing forward the lower end of the lumbar support body 2 after being transmitted through the rotating support member 210, thereby making the rotation adjustment operation of the lumbar support body 2 smoother.

[0067] It should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means more than three.

[0068] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the utility model disclosed in this application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the concept of the utility model. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A lumbar support rotation adjustment device, characterized in that: include: Back support (1); A lumbar support body (2), the upper end of the lumbar support body (2) being hinged to the back support (1), and a rotation mechanism being provided between the lumbar support body (2) and the back support (1); A rotation mechanism, the rotation mechanism comprising a rotation support member (210) and a sliding member (3), the sliding member (3) being slidably connected to the lumbar support body (2) in a vertical direction, one end of the rotation support member (210) being hinged to the lower end of the lumbar support body (2), and the other end of the rotation support member (210) being hinged to the sliding member (3); thus, as the sliding member (3) slides up and down, the rotation support member (210) pushes or pulls the lower end of the lumbar support body (2), thereby driving the lumbar support body (2) to rotate forward and backward relative to the back support (1); after the sliding member (3) stops moving, it remains relatively fixed with the back support (1), and at the same time, the lumbar support body (2) stays at the corresponding position.

2. The lumbar support rotation adjustment device according to claim 1, characterized in that: A gear adjustment mechanism is provided between the sliding member (3) and the back support (1), the gear adjustment mechanism comprising a gear slot (310) provided on one of the sliding member (3) and the back support (1), one side of the gear slot (310) having a plurality of tooth slots (311); the other of the sliding member (3) and the back support (1) is provided with a first elastic member (110), one end of the first elastic member (110) is connected to a locking member (120), the locking member (120) is provided with a clamping head (121) capable of engaging with the tooth slot (311), the first elastic member (110) always applies elasticity to the locking member (120) in the direction of the tooth slot (311); when the sliding member (3) slides downward, the clamping head (121) is engaged with the plurality of tooth slots (311) in sequence under the elastic force of the first elastic member (110).

3. The lumbar support rotation adjustment device according to claim 2, characterized in that: The sliding member (3) is hollowed out to form the gear groove (310), and a plurality of tooth grooves (311) are recessed on a groove wall on one side of the gear groove (310). The gear groove (310) includes a gear reset portion (312) extending in a vertical direction and the tooth grooves (311) recessed on one side of the gear reset portion (312). A gear adjustment portion (313) is formed between the plurality of tooth grooves (311); when the sliding member (3) moves downward, the clamping head (121) moves in the gear adjustment portion (313); when the sliding member (3) moves upward, the clamping head (121) moves in the gear reset portion (312).

4. The lumbar support rotation adjustment device according to claim 3, characterized in that: The tooth grooves (311) are uniformly arranged to be recessed obliquely downwards in a direction away from the gear reset portion (312).

5. The lumbar support rotation adjustment device according to claim 2, characterized in that: The front end surface of the back support (1) is recessed to form a first mounting groove (130), and the first elastic member (110) and the locking member (120) are arranged in the first mounting groove (130).

6. The lumbar support rotation adjustment device according to claim 5, characterized in that: The two ends of the locking member (120) distributed in the vertical direction are respectively a rotating end (122) and a supporting end (123); the clamping head (121) is arranged at the rotating end (122); the first mounting groove (130) and the two side walls opposite to the rotating end (122) and the supporting end (123) are both recessed with a fixing groove (131); the locking member (120) has a switchable gear adjustment state and a gear reset state; the gear groove (310) includes a gear adjustment portion (313) having the tooth groove (311) and a gear reset portion (312) extending in the vertical direction; when When the lumbar support body (2) moves downward, the locking member (120) is in a gear adjustment state, the supporting end (123) abuts against the fixing groove (131), and the rotating end (122) can rotate left and right around the supporting end (123), so that the clamping head (121) moves in the gear adjustment portion (313); when the lumbar support body (2) moves upward, the locking member (120) is in a gear reset state, the rotating end (122) and the supporting end (123) both abut against the fixing groove (131), so that the clamping head (121) moves in the gear reset portion (312).

7. The lumbar support rotation adjustment device according to claim 6, characterized in that: One end of the gear reset portion (312) close to the top of the gear adjustment portion (313) is recessed upward to form a conversion portion (314). When the sliding member (3) moves downward to the lowest position, the clamping head (121) is clamped into the conversion portion (314) and drives the locking member (120) to switch to the gear reset state, so that the rotating end (122) and the supporting end (123) are both in contact with the fixing groove (131). As a result, when the sliding member (3) moves upward, the clamping head (121) moves in the gear reset portion (312) without being constrained by the gear adjustment portion (313).

8. The lumbar support rotation adjustment device according to claim 1, characterized in that: The front end cover of the back support (1) is provided with a cover plate (140), and the rear end of the cover plate (140) is recessed and provided with a sliding support groove (141) extending in a vertical direction. The sliding member (3) is arranged in the sliding support groove (141) and can slide up and down along the sliding support groove (141).

9. The lumbar support rotation adjustment device according to claim 8, characterized in that: The left and right sides of the sliding support groove (141) are through-set, and the left and right ends of the sliding member (3) pass through the sliding support groove (141), and the left and right ends of the sliding member (3) passing through the sliding support groove (141) both extend forward to form hinged portions (320), and the rear end of the rotating support member (210) is hinged between the two hinged portions (320).

10. The lumbar support rotation adjustment device according to claim 1, characterized in that: A second elastic member (150) is provided at the front end of the back support (1), and the second elastic member (150) acts on the bottom end of the sliding member (3), so that the sliding member (3) always has a tendency to slide upward relative to the back support (1).

11. The lumbar support rotation adjustment device according to claim 1, characterized in that: The left and right ends of the sliding member (3) extend towards the left and right sides respectively to form adjustment portions (330), and the adjustment portions (330) are configured for a user to adjust the sliding member (3).

12. The lumbar support rotation adjustment device according to claim 1, characterized in that: The rotating support member (210) is a crank, and the middle portion of the rotating support member (210) is bent upward.

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