Rhythmic shelves and rhythmic furniture

Abstract

This utility model relates to the field of furniture technology, providing a rhythmic frame and rhythmic furniture. The rhythmic frame includes a rhythmic core and a load-bearing component. The load-bearing component includes a support base, a linkage mechanism, and a lead screw mechanism. The linkage mechanism has a backrest unit and a leg support unit. In the extended state, the backrest unit and the leg support unit are unfolded; in the retracted state, the backrest unit and the leg support unit are brought together. The linkage mechanism has a sliding structure, and the support base has a guide rail structure. The guide rail structure and the sliding structure slide together, allowing the leg support unit and the backrest unit to move along a preset trajectory. The guide rail structure has at least one limiting part. When the leg support unit and the backrest unit move to their extended limit position or their brought together limit position, the limiting part and the sliding structure form an abutment engagement to restrict the movement of the leg support unit and the backrest unit. This effectively suppresses vertical tilting, eliminates swaying and noise, and improves the overall stability and user experience of the product.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and in particular to a rhythm frame and rhythm furniture. Background Technology

[0002] In the technology of rhythmic furniture such as zero-gravity rhythmic chairs, lead screw mechanisms are often used to drive the backrest and leg rest to flip, thus switching between their folded and unfolded states.

[0003] However, during horizontal reciprocating motion, the inherent axial clearance of the lead screw mechanism (the movement clearance of the lead screw along the axial direction) and the inherent clearance of the threaded fit between the lead screw and the sleeve can cause specific problems: when the rhythmic seat is subjected to horizontal vibration excitation and the lead screw is in a non-driven state (i.e., at rest), under the action of inertia, the lead screw will undergo periodic slight relative displacement with respect to the sleeve (manifested as alternating elongation or shortening). This phenomenon causes alternating vertical tilting between the leg rest and the backrest, and its negative impact is mainly reflected in two aspects: first, it causes structural noise; second, it prevents the rhythmic seat from maintaining a purely horizontal rhythm, thus affecting the user experience. Utility Model Content

[0004] This utility model provides a rhythm frame to solve the problem in the prior art where the rhythm chair, due to the gap between the lead screw and the screw sleeve, causes inertial movement under horizontal vibration, resulting in the backrest and leg rest to alternately tilt up and down, generating noise and affecting the smoothness and comfort of the rhythm.

[0005] This utility model provides a rhythm frame, comprising:

[0006] The actuator core is configured for reciprocating motion;

[0007] The load-bearing component includes a support base, a linkage mechanism, and a lead screw mechanism. The support base is connected to the actuator core and can reciprocate with the actuator core. The linkage mechanism is located on the support base and is connected to the power output end of the lead screw mechanism to enable the linkage mechanism to switch between an extended state and a retracted state.

[0008] One end of the linkage mechanism is provided with a backrest unit, and the other end of the linkage mechanism is provided with a leg support unit. In the extended state of the linkage mechanism, the backrest unit and the leg support unit are unfolded relative to the support seat. In the retracted state of the linkage mechanism, the backrest unit and the leg support unit are close to the support seat.

[0009] One of the linkage mechanism and the support base is provided with a sliding structure, and the other is provided with a guide rail structure. The guide rail structure and the sliding structure are slidably engaged, so that the leg support unit and the backrest unit move along a preset trajectory.

[0010] The guide rail structure is provided with at least one limiting part. When the leg support unit and the backrest unit move to their extended limit position or their close limit position, the limiting part forms an abutting engagement with the sliding structure to restrict the movement of the leg support unit and the backrest unit.

[0011] According to the present invention, a rhythm frame is provided, wherein the sliding structure includes a sliding protrusion, the guide rail structure includes a guide channel, and the limiting part is a limiting end face in the length direction of the guide channel;

[0012] The sliding protrusion is inserted into the guide channel and can slide along the length of the guide channel.

[0013] According to the present invention, a rhythm frame is provided, wherein there are two limiting parts, and the two limiting parts are respectively located at opposite ends of the guide channel;

[0014] When one of the limiting parts abuts against the sliding structure, it locks the leg support unit and the backrest unit to the extended limit position; when the other limiting part abuts against the sliding structure, it locks the leg support unit and the backrest unit to the closed limit position.

[0015] According to the present invention, a rhythm frame is provided, wherein the guide channel is arc-shaped and the sliding protrusion is circular;

[0016] The guide channel and the sliding protrusion abut against each other in the width direction of their sidewalls.

[0017] According to the present invention, in a rhythm frame, the sliding protrusion is configured as a rotatable roller.

[0018] According to the rhythm frame provided by this utility model, the linkage mechanism includes:

[0019] Two sets of linkage assemblies are rotatably mounted on the support base, and the linkage assemblies have an extended state and a retracted state;

[0020] A connecting bracket is provided, with its two ends connected to two sets of connecting rod assemblies in a one-to-one correspondence, and the connecting bracket is connected to the power output end of the lead screw mechanism for transmission.

[0021] The connecting bracket has at least one end provided with the sliding structure or the guide rail structure.

[0022] According to the present invention, in a rhythm frame, the leg support unit and the linkage mechanism are rotatably connected via bearing components.

[0023] According to the rhythm frame provided by this utility model, the leg support unit includes:

[0024] Leg support frame, used to support the user's legs;

[0025] A first connecting plate is provided with a first connecting position and a second connecting position. The first connecting position is rotatably connected to the leg support body, and the second connecting position is rotatably connected to the linkage mechanism.

[0026] The second connecting plate has a third connecting position and a fourth connecting position. The third connecting position is rotatably connected to the first connecting plate, and the fourth connecting position is rotatably connected to the linkage mechanism.

[0027] The third connecting position is rotatably connected to the first connecting plate at a position between the first connecting position and the second connecting position.

[0028] According to the present invention, a rhythm frame is provided, the rhythm core comprising:

[0029] Fixed base frame;

[0030] A rhythmic support frame, which is movably mounted on the fixed base frame;

[0031] A drive mechanism is provided on the fixed base frame, and the power output end of the drive mechanism is connected to the rhythm support to drive the rhythm support to reciprocate relative to the fixed base frame.

[0032] The support base is fixedly connected to the rhythm bracket.

[0033] This utility model also provides a rhythmic furniture, including the above-mentioned rhythmic frame.

[0034] The rhythmic frame provided by this utility model forces the leg support unit to move along a preset rhythmic trajectory by adding a guide rail structure and a sliding structure between the linkage mechanism and the support base. When the leg support unit and the backrest unit move to their extended / closed limit positions, the limiting part on the guide rail structure forms a rigid abutment with the sliding structure. At this time, even if horizontal vibration causes the lead screw of the screw mechanism to extend and retract due to inertia, the limiting part directly locks the limit positions of the leg support unit and the backrest unit through mechanical contact, which can effectively suppress the transformation into vertical tilting, thereby avoiding the problem of alternating up and down tilting of the leg support unit and the backrest unit. At the same time, the limiting part forms a rigid abutment at the end position, eliminating shaking and noise, and improving the overall stability of the product and the user experience. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a structural schematic diagram of the rhythmic seat provided by this utility model in its close-up state.

[0037] Figure 2 yes Figure 1 An enlarged schematic diagram of the structure at point A in the middle.

[0038] Figure 3 This is a structural schematic diagram of the leg support unit and backrest unit of the rhythmic seat provided by this utility model, in a partially unfolded state.

[0039] Figure 4 yes Figure 3 A schematic diagram of its breakdown.

[0040] Figure 5 yes Figure 4 Enlarged schematic diagram of the structure at point B.

[0041] Figure label:

[0042] 100. Rhythm actuator core; 110. Fixed base frame; 120. Rhythm support frame; 130. Drive mechanism;

[0043] 200, Load-bearing component; 210, Support base; 220, Linkage mechanism; 221, Linkage assembly;

[0044] 2211, First link; 2212, Second link; 2213, Third link; 2214, Fourth link; 222, Connecting bracket;

[0045] 230. Screw mechanism; 240. Backrest unit; 241. Backrest frame;

[0046] 250, Leg support unit; 251, Leg support frame; 252, First connecting plate; 2521, First connecting position; 2522, Second connecting position; 253, Second connecting plate; 2531, Third connecting position; 2532, Fourth connecting position; 260, Limiting plate;

[0047] 300. Sliding structure; 310. Sliding protrusion; 320. Sliding plate;

[0048] 400. Guide rail structure; 410. Limiting part; 420. Guide channel; 430. Fixing plate. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0050] The following is combined with Figures 1-5 This invention describes a rhythmic frame and rhythmic furniture. It is understood that the rhythmic furniture can be a rhythmic chair, a rhythmic bed, etc. In this embodiment, a rhythmic chair is used as an example of rhythmic furniture, which includes a rhythmic frame and a sofa panel fitted onto the rhythmic frame.

[0051] Understandably, referring to Figure 1 , Figure 3 and Figure 4 In some examples of this utility model, the rhythm frame includes a rhythm core 100 and a support assembly 200. The rhythm core 100 is configured to reciprocate. The support assembly 200 includes a support base 210, a linkage mechanism 220, and a lead screw mechanism 230. The support base 210 is connected to the rhythm core 100 and can reciprocate with the rhythm core 100. The linkage mechanism 220 is located on the support base 210 and is connected to the power output end of the lead screw mechanism 230 to enable the linkage mechanism 220 to switch between an extended state and a retracted state.

[0052] One end of the linkage mechanism 220 is provided with a backrest unit 240, and the other end of the linkage mechanism 220 is provided with a leg support unit 250. When the linkage mechanism 220 is extended, the backrest unit 240 and the leg support unit 250 are unfolded relative to the support seat 210. When the linkage mechanism 220 is retracted, the backrest unit 240 and the leg support unit 250 are brought closer to the support seat 210.

[0053] Reference Figure 2 and Figure 5 One of the linkage mechanism 220 and the support base 210 is provided with a sliding structure 300, and the other is provided with a guide rail structure 400. The guide rail structure 400 and the sliding structure 300 are slidably engaged, so that the leg support unit 250 and the backrest unit 240 move along a preset trajectory.

[0054] The guide rail structure 400 is provided with at least one limiting part 410. When the leg support unit 250 and the backrest unit 240 move to their extended limit position or close limit position, the limiting part 410 forms an abutting engagement with the sliding structure 300 to restrict the movement of the leg support unit 250 and the backrest unit 240.

[0055] The rhythmic frame provided by this utility model forces the leg support unit 250 to move along a preset rhythmic trajectory by adding a guide rail structure 400 and a sliding structure 300 between the linkage mechanism 220 and the support base 210. When the leg support unit 250 and the backrest unit 240 move to their extended / closed limit positions, the limiting part 410 on the guide rail structure 400 forms a rigid abutment with the sliding structure 300. At this time, even if horizontal vibration causes the lead screw of the lead screw mechanism 230 to extend or retract due to inertia, the limiting part 410 directly locks the movement limit positions of the leg support unit 250 and the backrest unit 240 through mechanical contact, which can effectively suppress the transformation into up-and-down tilting, thereby avoiding the problem of the leg support unit 250 and the backrest unit 240 tilting up and down alternately. At the same time, the limiting part 410 forms a rigid abutment at the end position, eliminating shaking and noise, and improving the overall stability of the product and the user experience.

[0056] It should be noted that in some examples of this utility model, the linkage mechanism 220 is rotatably mounted on the support base 210; the aforementioned sofa panel is installed on the load-bearing component 200, and sofa cushions and other parts are fitted on the sofa panel.

[0057] Understandably, referring to Figure 1 , Figure 3 and Figure 4 In some examples of this utility model, the rhythmic core 100 includes a fixed base 110, a rhythmic support 120, and a drive mechanism 130. The rhythmic support 120 is movably mounted on the fixed base 110, and the drive mechanism 130 is mounted on the fixed base 110. The power output end of the drive mechanism 130 is connected to the rhythmic support 120 for transmission, so as to drive the rhythmic support 120 to reciprocate relative to the fixed base 110. The support base 210 is fixedly connected to the rhythmic support 120.

[0058] It should be noted that in some examples of this utility model, the above-mentioned rhythmic furniture has three rhythmic modes, which can be understood as multi-dimensional rhythm, such as: left-right rhythm alone, front-back rhythm alone, or left-right rhythm combined with front-back rhythm.

[0059] By configuring the rhythmic support 120 as a relatively fixed base 110, it can rhythmically move forward and backward and / or left and right. The left-right and forward / backward movements can be freely switched, and the switching is convenient. The structure is simple and low-cost, providing users with a more comprehensive health experience: First, multi-dimensional rhythmic movement can deeply stimulate various organs and tissues of the body, significantly improving blood circulation efficiency; second, the composite rhythmic mode can more effectively promote lymphatic drainage and gastrointestinal motility; third, the bidirectional switching motion design avoids fatigue from movement in one direction, making the rhythmic process more comfortable and natural. Different directions of rhythmic movement produce differentiated tactile feedback, which not only enriches the user experience but also specifically meets the user's personalized health needs, qualitatively improving both the functionality and comfort of the rhythmic furniture.

[0060] It is understood that in some examples of this utility model, the drive mechanism 130 includes a drive motor, a transmission crankshaft, a rocker arm, and an elastic transmission structure. The drive motor is mounted on a fixed base 110, and the transmission crankshaft is rotatably mounted on the fixed base 110. One end of the transmission crankshaft is connected to the output shaft of the drive motor via a pulley transmission assembly. One end of the rocker arm is provided with a connecting hole, through which the transmission crankshaft passes. The rotation center of the transmission crankshaft is eccentrically set with the center of the connecting hole. The other end of the rocker arm is connected to one end of the elastic transmission structure, and the other end of the elastic transmission structure is connected to the rhythmic bracket 120.

[0061] With the above structure, due to the eccentric design, the rotational motion generated by the drive motor is converted into eccentric motion, thereby generating a periodic torque on the transmission crankshaft, which causes the rhythm bracket 120 to reciprocate (back and forth or left and right) relative to the fixed base frame 110. The structure is compact and provides flexible, efficient and precise motion control.

[0062] Of course, in other examples, the drive mechanism 130 can also be magnetically driven, using a magnet and a coil. By changing the energization state of the coil, an attractive or repulsive force is generated between the coil and the magnet, thereby driving the rhythmic seat to move.

[0063] It is understood that in some examples of this utility model, the lead screw mechanism 230 includes a power motor, a lead screw and a screw sleeve. The screw sleeve is driven to rotate by the power motor, and the screw sleeve rotates relative to the lead screw. The lead screw, as the power output end of the lead screw mechanism 230, is in transmission cooperation with the linkage mechanism 220 so that the linkage mechanism 220 switches between the extended state and the retracted state.

[0064] Of course, in some other examples, the power motor drives the lead screw to rotate, the lead screw rotates relative to the threaded sleeve, and the threaded sleeve, as the power output end of the lead screw mechanism 230, is in transmission cooperation with the connecting mechanism.

[0065] It should be noted that in some examples of this utility model, according to the structural design of the lead screw mechanism 230, when the limiting part 410 and the sliding structure 300 form an abutting fit, the lead screw and the threaded sleeve are in a tight fit state. The above-mentioned abutting fit method effectively eliminates the gap between the lead screw and the threaded sleeve, avoids reciprocating motion caused by the gap, and thus prevents the leg support unit 250 and the backrest unit 240 from alternating up and down tilting.

[0066] Specifically, refer to Figure 2 and Figure 5 In some embodiments of this utility model, the linkage mechanism 220 is provided with a sliding structure 300, and the support base 210 is provided with a guide rail structure 400. Of course, in other embodiments, the sliding structure 300 may also be provided in the linkage mechanism 220, and the guide rail structure 400 may also be provided on the support base 210.

[0067] In some examples of this utility model, the sliding structure 300 includes a sliding protrusion 310, which is disposed on the linkage mechanism 220; the guide rail structure 400 includes a guide channel 420, and the limiting part 410 is a limiting end face in the length direction of the guide channel 420.

[0068] The sliding protrusion 310 is inserted into the guide channel 420 and can slide along the length of the guide channel 420.

[0069] Based on the above structure, the sliding protrusion 310, in cooperation with the guide channel 420, restricts the leg support unit 250 and the backrest unit 240 to move only along the direction of the guide channel 420. During horizontal movement, the sliding protrusion 310 slides within the guide channel 420 to accommodate horizontal displacement. The limiting end face forms a hard stop at the end of the stroke, eliminating swaying and impact noise, thus ensuring smooth and precise movement. The structure is simple and the cost is low.

[0070] It should be noted that the aforementioned guide channel 420 can be a groove structure formed by an inward indentation on one side, or it can be an open U-shaped guide channel with both sides open and the ends closed; there is no limitation here.

[0071] More specifically, refer to Figure 2 and Figure 5 In some examples of this utility model, there are two limiting parts 410, and the two limiting parts 410 are respectively located at the front and rear ends of the guide channel 420.

[0072] When one of the limiting parts 410 abuts against the sliding structure 300, it locks the leg support unit 250 and the backrest unit 240 to the extended limit position; when the other limiting part 410 abuts against the sliding structure 300, it locks the leg support unit 250 and the backrest unit 240 to the closed limit position.

[0073] With the above structure, a limiting part 410 is provided at each end of the guide channel 420, which together constitutes a mechanical hard limit on the movement stroke of the leg support unit 250 and the backrest unit 240. When the sliding structure 300 moves to one end of the channel and abuts against the limiting part 410, the leg support unit 250 and the backrest unit 240 are precisely locked in the unfolded state; when it slides to the other end and abuts, they are locked in the folded state. This helps to eliminate the shaking and noise caused by the lead screw of the lead screw mechanism 230 at the end of its stroke, ensuring the structural rigidity and posture stability of the rhythmic seat in any state, and significantly improving the product's quality and user experience.

[0074] Understandably, referring to Figure 2 and Figure 5 In some examples of this utility model, the guide channel 420 is arc-shaped and the sliding protrusion 310 is circular; wherein the sidewalls of the guide channel 420 and the sliding protrusion 310 abut against each other in the width direction.

[0075] By employing the above structure, the precise guidance and constraint of the leg support unit 250's motion trajectory are achieved through the cooperation of the arc-shaped guide channel 420 and the circular sliding protrusion 310. When the circular sliding protrusion 310 slides within the arc-shaped guide channel 420, its sidewall maintains continuous surface contact with the wall of the guide channel 420, effectively converting the motion transmitted by the lead screw mechanism 230 into a smooth arc motion conforming to the preset trajectory. This surface contact cooperation not only significantly improves the smoothness and stability of the motion but also effectively resists lateral forces and impacts, suppressing swaying and noise caused by gaps, thereby ensuring that the leg support unit 250 remains stable and quiet in any position.

[0076] Specifically, refer to Figure 2 and Figure 5 In some examples of this invention, the sliding protrusion 310 is configured as a rotatable roller. The roller rolls within the guide channel 420, replacing the original sliding friction and fundamentally eliminating the friction noise and sticking sensation caused by the direct sliding of metal or plastic parts, making the extension and retraction of the leg support unit 250 extremely smooth and quiet.

[0077] The rolling friction coefficient is much lower than the sliding friction coefficient, which reduces the driving load on the lead screw mechanism 230, making the movement lighter. It also avoids wear caused by sliding, improving the lifespan and reliability of this moving part. The smooth and quiet operation directly translates into a premium product feel and user experience, which is a key improvement, especially for high-end rhythmic seats that prioritize zero noise and ultimate smoothness.

[0078] Of course, in some other examples, the sliding protrusion 310 can also be a rolling bearing.

[0079] Understandably, referring to Figures 1 to 5 In some examples of this utility model, the linkage mechanism 220 includes two sets of linkage assemblies 221 and a connecting bracket 222. The two sets of linkage assemblies 221 are rotatably mounted on the support base 210. The linkage assemblies 221 have an extended state and a retracted state. The two ends of the connecting bracket 222 are connected to the two sets of linkage assemblies 221 one by one. The connecting bracket 222 is connected to the power output end of the lead screw mechanism 230.

[0080] The connecting bracket 222 has a sliding structure 300 at at least one end. Of course, in some examples, the connecting bracket 222 may also have a guide rail structure 400.

[0081] Using the above structure, the linear power of the lead screw mechanism 230 is synchronously transmitted to the two sets of connecting rod assemblies 221 through the connecting bracket 222, ensuring that they coordinate to achieve extension or retraction movements. By placing the sliding structure 300 or the guide rail structure 400 at the end of the connecting bracket 222, the terminal motion trajectory of the connecting rod mechanism 220 can be precisely constrained and guided, effectively eliminating problems such as jamming, noise, and shaking caused by asynchronous movement on both sides or inertial impact, and significantly improving the balance, rigidity, and overall stability of the rhythmic seat during retraction and rhythmic movements.

[0082] It should be noted that in this embodiment, the middle part of the connecting bracket 222 is connected to the lead screw of the lead screw mechanism 230.

[0083] Specifically, refer to Figures 1 to 5 In some examples of this utility model, both ends of the connecting bracket 222 are provided with sliding structures 300. More specifically, in this embodiment, the sliding structure 300 further includes a sliding plate 320, which is fixedly connected to the connecting bracket 222. The sliding protrusion 310 is rotatably mounted on the sliding plate 320. The guide rail structure 400 includes a fixing plate 430, which is fixedly connected to the support base 210. The fixing plate 430 is provided with a guide channel 420.

[0084] Specifically, refer to Figures 1 to 5In some examples of this utility model, the linkage assembly 221 is a four-bar structure, including a first link 2211, a second link 2212, a third link 2213, and a fourth link 2214. The first link 2211 and the second link 2212 are arranged opposite to each other, and the third link 2213 and the fourth link 2214 are arranged opposite to each other. The middle part of the first link 2211 is rotatably connected to the support base 210. The backrest unit 240 is located at the front end of the first link 2211, and the leg support unit 250 is located at the rear end of the first link 2211. One end of the third link 2213 is rotatably connected to one end of the first link 2211, and the other end of the third link 2213 is rotatably connected to the second link 2211. One end of the connecting rod 2212 and one end of the fourth connecting rod 2214 are rotatably connected to the other end of the first connecting rod 2211. The other end of the fourth connecting rod 2214 is rotatably connected to the other end of the second connecting rod. The sliding plate 320 and the connecting bracket 222 are located on both sides of the third connecting rod 2213 and can be rotatably set relative to the third connecting rod 2213. The connecting bracket 222, the sliding plate 320 and the connecting bracket 222 are linked together. Driven by the screw mechanism 230, the relative angles of the first connecting rod 2211, the second connecting rod 2212, the third connecting rod 2213 and the fourth connecting rod 2214 of the connecting rod assembly 221 change, thereby realizing the extension or contraction movement.

[0085] The lead screw mechanism 230 drives the connecting bracket 222, precisely controlling the relative angle changes between the first link 2211, the second link 2212, the third link 2213, and the fourth link 2214, thus achieving the smooth unfolding and folding of the leg support unit 250 and the backrest unit 240. Its unique design separates the sliding plate 320 and the connecting bracket 222 on both sides of the third link 2213 and rotates them in conjunction, effectively enhancing the lateral rigidity and stability of the mechanism during movement, significantly suppressing the swaying and noise that may be caused by horizontal vibration, and ensuring the reliability of the support and the precision of the movement.

[0086] It can be understood that the aforementioned connecting bolts are rotatably threaded through the sliding plate 320 and the third connecting rod 2213, and are threadedly fixed to the connecting bracket 222. The structure is simple and easy to disassemble and assemble.

[0087] It is understood that in some examples of this utility model, the leg support unit 250 is rotatably connected to the third link 2213 of the linkage mechanism 220 via bearing components.

[0088] By incorporating a bearing at the rotating connection, motion resistance is fundamentally reduced. This significantly improves the smoothness and quietness of the leg support unit 250's extension and retraction movements, while also reducing wear at the connection, enhancing structural durability and operational feel, and optimizing the overall user experience.

[0089] More specifically, refer to Figure 4 and Figure 5 In some examples of this utility model, the leg support unit 250 includes a leg support frame 251, a first connecting plate 252 and a second connecting plate 253, and the leg support frame 251 is used to support the user's legs.

[0090] The first connecting plate 252 is provided with a first connecting position 2521 and a second connecting position 2522. The first connecting position 2521 is rotatably connected to the leg support body 251, and the second connecting position 2522 is rotatably connected to the third link 2213 of the linkage mechanism 220. The second connecting plate 253 is provided with a third connecting position 2531 and a fourth connecting position 2532. The third connecting position 2531 is rotatably connected to the first connecting plate 252, and the fourth connecting position 2532 is rotatably connected to the third link 2213 of the linkage mechanism 220.

[0091] The third connecting position 2531 is rotatably connected to the first connecting plate 252 at a position between the first connecting position 2521 and the second connecting position 2522.

[0092] It should be noted that, in this embodiment, in order to improve transmission stability, two first connecting plates 252 are provided at both ends of the leg support body 251.

[0093] With the above structure, the leg support unit 250 forms a compound rotational connection with the third link 2213 through the first connecting plate 252 and the second connecting plate 253, constituting a precise motion adjustment mechanism. By setting the hinge point between the second connecting plate 253 and the first connecting plate 252, i.e., the third connecting position 2531, between the first connecting position 2521 and the second connecting position 2522, the force transmission path is effectively optimized. This layout enhances the posture stability of the leg support frame 251 during the unfolding and retraction process, can adaptively adjust the tilt angle to closely fit the leg curve, and effectively suppresses the impact and sway from the link mechanism 220, greatly improving the load-bearing comfort and smooth movement.

[0094] It should be noted that in some examples of this utility model, the backrest unit 240 includes two sets of backrest frames 241, and the two sets of backrest frames 241 are connected one-to-one with the fourth link 2214 of the two sets of link assemblies 221.

[0095] It should also be noted that, referring to Figure 3 and Figure 4In this embodiment, the bearing assembly 200 further includes two sets of limiting plates 260. The two sets of limiting plates 260 are correspondingly arranged with the fourth connecting rods 2214 of the two sets of connecting rod assemblies 221. One end of the limiting plate 260 is rotatably connected to the fourth connecting rod 2214, and the other end is rotatably connected to the support base 210. The connection point between the first connecting rod 2211 and the support base 210 is higher than the connection point between the fourth connecting rod 2214 and the limiting plate 260, so that the connecting rod mechanism 220 is inclinedly arranged above the support base 210.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A beat rack, characterized in that, include: The percussion core (100) is configured to reciprocate; The supporting component (200) includes a support base (210), a linkage mechanism (220), and a lead screw mechanism (230). The support base (210) is connected to the actuator core (100) and can reciprocate with the actuator core (100). The linkage mechanism (220) is located on the support base (210) and is connected to the power output end of the lead screw mechanism (230) so that the linkage mechanism (220) can switch between an extended state and a retracted state. One end of the linkage mechanism (220) is provided with a backrest unit (240), and the other end of the linkage mechanism (220) is provided with a leg support unit (250). In the extended state of the linkage mechanism (220), the backrest unit (240) and the leg support unit (250) are both deployed relative to the support base (210); In the retracted state of the linkage mechanism (220), the backrest unit (240) and the leg support unit (250) are close together relative to the support base (210); One of the linkage mechanism (220) and the support base (210) is provided with a sliding structure (300), and the other is provided with a guide rail structure (400). The guide rail structure (400) and the sliding structure (300) are slidably engaged, so that the leg support unit (250) and the backrest unit (240) move along a preset trajectory. The guide rail structure (400) is provided with at least one limiting part (410). When the leg support unit (250) and the backrest unit (240) move to their extended limit position or their close limit position, the limiting part (410) and the sliding structure (300) form an abutting engagement to restrict the movement of the leg support unit (250) and the backrest unit (240).

2. The beat rack of claim 1, wherein, The sliding structure (300) includes a sliding protrusion (310), the guide rail structure (400) includes a guide channel (420), and the limiting part (410) is a limiting end face in the length direction of the guide channel (420); The sliding protrusion (310) is inserted into the guide channel (420) and can slide along the length of the guide channel (420).

3. The beat frame of claim 2, wherein, There are two limiting parts (410), and the two limiting parts (410) are respectively located at opposite ends of the guide channel (420); When one of the limiting parts (410) abuts against the sliding structure (300), it locks the leg support unit (250) and the backrest unit (240) to the extended limit position; when the other limiting part (410) abuts against the sliding structure (300), it locks the leg support unit (250) and the backrest unit (240) to the closed limit position.

4. The beat frame of claim 2, wherein, The guide channel (420) is arc-shaped, and the sliding protrusion (310) is circular; The guide channel (420) and the sliding protrusion (310) abut against each other in the width direction.

5. The beatbox of claim 4, wherein, The sliding protrusion (310) is configured as a rotatable roller.

6. The beatbox of any one of claims 1 to 5, wherein, The linkage mechanism (220) includes: Two sets of linkage assemblies (221) are rotatably mounted on the support base (210), and the linkage assembly (221) has an extended state and a retracted state; The connecting bracket (222) is connected to the two sets of connecting rod assemblies (221) at both ends, and the connecting bracket (222) is connected to the power output end of the lead screw mechanism (230) for transmission. The connecting bracket (222) is provided with the sliding structure (300) or the guide rail structure (400) at at least one end.

7. The rhythm frame according to any one of claims 1 to 5, characterized in that, The leg support unit (250) and the linkage mechanism (220) are rotatably connected by bearing components.

8. The beatbox of claim 7, wherein, The leg support unit (250) includes: Leg support body (251) is used to support the user's legs; The first connecting plate (252) has a first connecting position (2521) and a second connecting position (2522). The first connecting position (2521) is rotatably connected to the leg support body (251), and the second connecting position (2522) is rotatably connected to the linkage mechanism (220). The second connecting plate (253) has a third connecting position (2531) and a fourth connecting position (2532). The third connecting position (2531) is rotatably connected to the first connecting plate (252), and the fourth connecting position (2532) is rotatably connected to the linkage mechanism (220). The third connecting position (2531) is rotatably connected to the first connecting plate (252) at a position between the first connecting position (2521) and the second connecting position (2522).

9. The beatbox of any one of claims 1 to 5, wherein, The percussion core (100) includes: Fixed base frame (110); A rhythmic support (120) is movably mounted on the fixed base frame (110). A drive mechanism (130) is provided on the fixed base frame (110). The power output end of the drive mechanism (130) is connected to the rhythm bracket (120) to drive the rhythm bracket (120) to reciprocate relative to the fixed base frame (110). The support base (210) is fixedly connected to the rhythm bracket (120).

10. A rhythmic furniture, characterized by Includes the rhythm frame as described in any one of claims 1 to 9.

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