Zero-space lying mechanism of backrest frame with sequentially-moving pull rod

Abstract

The invention discloses a pull rod sequential moving type backrest frame zero-space lying mechanism which comprises a base, a cushion frame, a backrest frame, a first-stage sliding piece and a second-stage sliding piece, the cushion frame is fixedly arranged on the first-stage sliding piece, the first-stage sliding piece is arranged on the base in a sliding mode, the second-stage sliding piece is arranged on the first-stage sliding piece in a sliding mode, a swing arm is arranged on the cushion frame, and the backrest frame is arranged on the swing arm. An elastic reset piece is arranged on the cushion frame, an electric push rod is arranged on the base, a pull rod is arranged on the secondary sliding piece, the other end of the pull rod is arranged on the backrest frame in a pulling mode, a blocking piece is arranged on the base, the double sliding rails are controlled by the single driving piece to move in sequence, and when the primary sliding piece drives the cushion frame to move to a designated position, the secondary sliding piece slides relative to the primary sliding piece. Further, the backrest frame is driven to lie down relatively through the pull rod, so that the function that the single driving mechanism drives the backrest frame to move forwards and lie down is achieved, and during resetting, the backrest frame starts to stand to an initial state, the back space is firstly reserved, and then the cushion frame moves backwards to reset to the initial state.

Description

Technical Field

[0001] The invention relates to the technical field of massagers, in particular to a pull rod sequentially movable backrest frame zero-space lying mechanism. Background Art

[0002] In order to provide a better massage experience, some massage chairs or massage sofas have a multi-angle lying structure, and some have optimized a zero-space lying mechanism, which requires the seat cushion frame and backrest frame of the massage chair to be moved forward in advance, and then the backrest frame is controlled to lie down, thereby preventing the backrest frame from scratching the wall.

[0003] In the prior art, the forward movement of the seat cushion frame and the lying down of the backrest frame need to be driven by multiple driving mechanisms. For example, the Chinese utility model patent with patent number "ZL202221264022.5" has the patent name: a zero-space counting roller single-slide massage chair frame structure. However, the mechanism uses a single-slide dual-drive method, and its cost is relatively high. In addition, it is necessary to control the working time of the corresponding driving parts separately, which leads to time difference in control and poor practicality. Summary of the invention

[0004] Purpose of the present invention: In order to overcome the defects of the prior art, the present invention provides a pull rod sequentially movable backrest frame zero-space lying mechanism, which adopts a single driving member to control the sequential movement of double slide rails. When the primary sliding member drives the seat cushion frame to move to a specified position, the secondary sliding member slides relative to the primary sliding member, and further drives the backrest frame to lie down relatively through the pull rod, thereby realizing the function of a single driving mechanism driving the backrest frame to move forward and lie down. The structural layout is reasonable and the control cost is relatively low.

[0005] The invention discloses a zero-space lying mechanism of a pull rod sequentially movable backrest frame, comprising a base, a cushion frame that can slide back and forth relative to the base, and a backrest frame that can rotate and lie relative to the seat cushion frame, and is characterized in that: it also includes a primary sliding member and a secondary sliding member, the seat cushion frame is fixedly arranged on the primary sliding member, the primary sliding member is slidably arranged on the base, and the secondary sliding member is slidably arranged on the primary sliding member, and the seat cushion frame is provided with swing arms on opposite sides corresponding to the backrest frame, the swing arm is fixedly arranged on the backrest frame toward one side of the backrest frame, and the seat cushion frame is also provided with an elastic reset member for driving the swing arm to rotate and reset, and an electric push rod is arranged on the base, the output end of the electric push rod acts on the secondary sliding member, and the secondary sliding member is also provided with a pull rod, the other end of the pull rod is pulled on the backrest frame, and the base is also provided with a blocking member for blocking the sliding displacement of the primary sliding member, when the primary sliding member is at the blocking member position, the secondary sliding member can slide relative to the primary sliding member, so that the pull rod pulls the backrest frame to rotate and lie down.

[0006] By adopting the above technical solution, when in use, the electric push rod can drive the secondary sliding member to slide forward, and at the same time, the pull rod will pull the backrest frame, because the restoring force of the elastic restoring member can prevent the backrest frame from lying down, so that the pull rod will pull the backrest frame forward, and at the same time, because the backrest frame is hinged on the swing arm, and the swing arm is provided on the seat cushion frame, and the seat cushion frame is further fixed on the primary sliding member, the primary sliding member can slide forward together with the secondary sliding member at this time. Furthermore, when the primary sliding member slides to the position of the blocking member, the blocking member acts as an obstacle to prevent the primary sliding member from continuing to slide, thereby stopping the seat cushion frame and the backrest frame from sliding forward. , the electric push rod will continue to drive the secondary sliding part to slide forward. At this time, the pull rod will pull the backrest frame to overcome the reset force of the elastic reset member, so that the backrest frame can lie down relatively, thereby realizing that one driving member can not only drive the cushion frame and the backrest frame to slide forward, but also control the backrest frame to lie down relatively, realizing the function of lying down in zero space. When the product is reset, the electric push rod drives the secondary sliding part to retreat relatively. At this time, the pull rod also retreats relatively, and the elastic reset member can drive the backrest frame to automatically reset and stand up due to the elastic force. This mechanism has the optimal moving sequence, thereby ensuring that the backrest frame will not touch the wall entity of the back, and the massage chair using this mechanism and the home wall are protected to the maximum extent.

[0007] The present invention is further configured to include a primary slide rail and a secondary slide rail, wherein the primary slide rail is arranged on the base, the primary sliding member is slidably arranged on the primary slide rail, the secondary slide rail is fixedly arranged on the primary sliding member, and the secondary sliding member is slidably arranged on the secondary slide rail.

[0008] By adopting the above technical solution, the secondary slide rail is arranged on the primary slide member, so that the secondary slide member can slide relative to the primary slide member and drive the primary slide member to reset, and the slide rail can guide the primary slide member and the secondary slide member to perform a guided sliding.

[0009] The present invention is further configured as follows: the blocking member is a first blocking plate arranged on the primary slide rail, the first blocking plate is located on the forward trajectory of the primary slide member, and a second blocking plate is also arranged on the primary slide rail, the first blocking plate, the second blocking plate and the primary slide rail cooperate to form a sliding section for limiting the sliding of the primary slide member.

[0010] By adopting the above technical solution, the first blocking plate can prevent the primary sliding member from detaching from the primary sliding rail, and by controlling the primary sliding member to stop, the secondary sliding member can be extended relative to the primary sliding member, so that the pull rod can be extended relatively, thereby pulling the backrest frame to rotate relatively and lie down, and the sliding section can prevent the primary sliding member from moving out, making it more stable when in use.

[0011] The present invention is further configured as follows: an extension piece extending to the position of the secondary slide rail is provided on the secondary slide member, and when the secondary slide member slides to a specified position, the extension piece can abut against the secondary slide rail and drive the primary slide member to move backward.

[0012] By adopting the above technical solution, the secondary sliding member can drive the secondary sliding rail to retreat, and the secondary sliding rail can drive the primary sliding member to slide and reset.

[0013] The present invention is further configured as follows: a connecting seat is provided on the backrest frame, one end of the pull rod close to the backrest frame is connected to the connecting seat and can rotate relative to the connecting seat, the elastic reset member is a coil spring, one end of the coil spring is fixedly provided on the base, and the other end is connected to the swing arm.

[0014] By adopting the above technical solution, when the pull rod pulls the connecting seat, the backrest frame can be driven to rotate relatively and lie down. At this time, the coil spring will be relatively tightened as the swing arm rotates. When the pull rod retreats and resets, the coil spring can drive the swing arm to reset, thereby driving the backrest frame to automatically stand up. The use of a connecting seat and a pull rod can make it more convenient during assembly, and the pull rod can rotate relative to the connecting seat to adapt to the angle changes during its movement.

[0015] A further configuration of the present invention is that a damping member for limiting the automatic lying down is provided on the base at the position of the swing arm.

[0016] By adopting the above technical solution, when the backrest lies down, it will drive the swing arm to rotate. When the damping member acts on the swing arm, it can not only provide a buffering force, but also cooperate with the coil spring to prevent the backrest from lying down automatically, which will play a role of auxiliary support.

[0017] A further configuration of the present invention is that the damping member is an elastic compression spring sheet, and a pressing surface cooperating with the elastic compression spring sheet is provided on the swing arm.

[0018] By adopting the above technical solution, the cooperation between the elastic compression spring sheet and the pressing surface can further prevent the swing arm from rotating, thereby playing a damping role and assisting the coil spring in stabilizing the backrest frame.

[0019] A further configuration of the present invention is as follows: two groups of the primary slide rails and the secondary slide rails are provided, and two groups of the primary sliding members and the secondary sliding members are also provided. The primary slide rails and the primary sliding members are provided in a one-to-one correspondence, and the secondary slide rails and the secondary sliding members are provided in a one-to-one correspondence, and a reinforcing rod is provided between the two secondary sliding members, and the output ends of the pull rod and the electric push rod are connected to the reinforcing rod.

[0020] The above technical solution can increase the stability of sliding. The reinforcing rod can not only increase the stability of the structure, but also facilitate the simultaneous sliding of the two sliding parts, thereby preventing the sliding from causing dislocation and achieving a reasonable structural layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the backrest frame of the present invention when it is erected; Figure 2 for Figure 1 Another perspective structural diagram; Figure 3 Partial structural diagram of the present invention; Figure 4 It is a schematic diagram of the rear structure of the present invention; Figure 5 This is a schematic diagram of the structure of the backrest frame of the present invention after lying down; Figure 6 It is a schematic diagram of the matching structure of the connecting rod and the connecting seat of the present invention; Figure 7 This is a schematic diagram of the base structure of the present invention; Figure 8 for Figure 2 Enlarged view of part a; Fig. 9 for Figure 3 Part b enlarged view; Fig.10 It is a motion schematic diagram of the present invention. DETAILED DESCRIPTION

[0022] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings: In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc. indicate orientations or positional relationships 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, rather than indicating or implying 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.

[0023] The present invention discloses a pull rod sequential movable backrest frame zero space lying mechanism, comprising a base 1, a cushion frame 2 that can slide forward and backward relative to the base 1, and a backrest frame 3 that can rotate and lie relative to the cushion frame 2. In the implementation case of the present invention, it also includes a primary sliding member 4 and a secondary sliding member 5. The cushion frame 2 is fixedly arranged on the primary sliding member 4, the primary sliding member 4 is slidably arranged on the base 1, and the secondary sliding member 5 is slidably arranged on the primary sliding member 4. The cushion frame 2 is provided with swing arms 6 on opposite sides corresponding to the backrest frame 3, and the swing arms 6 are swung toward the backrest frame 3. One side of the frame 3 is fixedly set on the backrest frame 3, and the cushion frame 2 is also provided with an elastic reset member 7 for driving the swing arm 6 to rotate and reset. An electric push rod 8 is arranged on the base 1, and the output end of the electric push rod 8 acts on the secondary sliding member 5, and a pull rod 9 is also provided on the secondary sliding member 5. The other end of the pull rod 9 is pulled on the backrest frame 3, and a blocking member for blocking the sliding displacement of the primary sliding member 4 is also provided on the base 1. When the primary sliding member 4 is in the blocking member position, the secondary sliding member 5 can slide relative to the primary sliding member 4, so that the pull rod 9 pulls the backrest frame 3 to rotate and lie down.

[0024] When the above technical scheme is adopted, the secondary sliding member 5 can be driven to slide forward through the operation of the electric push rod 8. At the same time, the pull rod 9 will pull the backrest frame 3. Because the restoring force of the elastic restoring member 7 can prevent the backrest frame 3 from lying down, the pull rod 9 will pull the backrest frame 3 forward. At the same time, because the backrest frame 3 is hinged on the swing arm 6, and the swing arm 6 is arranged on the seat cushion frame 2, and the seat cushion frame 2 is further fixed on the primary sliding member 4, the primary sliding member 4 can slide forward together with the secondary sliding member 5 at this time. Furthermore, when the primary sliding member 4 slides to the position of the blocking member, the blocking member plays an obstructive role to prevent the primary sliding member 4 from continuing to slide, so that the seat cushion frame 2 and the backrest frame 3 also stop sliding forward. Step by step, the electric push rod 8 will continue to drive the secondary sliding member 5 to slide forward. At this time, the pull rod 9 will pull the backrest frame 3 to overcome the reset force of the elastic reset member 7, so that the backrest frame 3 can lie down relatively, thereby realizing that a driving member can not only drive the cushion frame 2 and the backrest frame 3 to slide forward, but also control the backrest frame 3 to lie down relatively, realizing the function of lying down in zero space. When the product is reset, the electric push rod 8 drives the secondary sliding member 5 to retreat relatively. At this time, the pull rod 9 also retreats relatively. The elastic reset member 7 can drive the backrest frame 3 to automatically reset and stand up due to the elastic force. The mechanism has an optimal moving order, thereby ensuring that the backrest frame 3 will not touch the wall entity of the back, and the massage chair using this mechanism and the home wall are protected to the maximum extent.

[0025] The first and second slide members 10 and 11 are also provided with a first-level slide rail 10 and a second-level slide rail 11 (the first-level slide rail 10 and the second-level slide rail 11 are preferably provided with a ball belt to reduce friction, and the tops of the first-level slide rail 10 and the second-level slide rail 11 are preferably turned outward to form flanges, and the bottom openings of the first-level slide member 4 and the second-level slide member 5 form a sliding groove, which does not affect the normal sliding of the first-level slide member 4 and the second-level slide member 5, and can prevent the first-level slide member 4 and the second-level slide member 5 from falling out, and the ball belt can also be provided on the flange). The first-level slide rail 10 is provided on the base 1, the first-level slide member 4 is slidably provided on the first-level slide rail 10, the second-level slide rail 11 is fixedly provided on the first-level slide member 4, and the second-level slide member 5 is slidably provided on the second-level slide rail 11. The second-level slide rail 11 is provided on the first-level slide member 4, so that the second-level slide member 5 can both slide relative to the first-level slide member 4 and drive the first-level slide member 4 to reset, and the slide rail can guide the first-level slide member 4 and the second-level slide member 5 to perform a guided sliding.

[0026] The blocking member is a first blocking piece 12 (of course, the blocking member can also be a blocking rod or a blocking block) arranged on the primary slide rail 10. The first blocking piece 12 is located on the forward trajectory of the primary sliding member 4, and the primary slide rail 10 is also provided with a second blocking piece 13. The first blocking piece 12, the second blocking piece 13 and the primary slide rail 10 cooperate to form a sliding section 14 for limiting the sliding movement of the primary sliding member 4. The first blocking piece 12 can prevent the primary sliding member 4 from separating from the primary slide rail 10, and, by controlling the primary sliding member 4 to stop, the secondary sliding member 5 can be extended relative to the primary sliding member 4, so that the pull rod 9 can be relatively extended, thereby pulling the backrest frame 3 to rotate relatively and lie down, and the sliding section 14 can prevent the primary sliding member 4 from moving out, making it more stable when in use.

[0027] The secondary sliding member 5 is provided with an extension piece 15 extending to the position of the secondary sliding rail 11 (of course, the extension piece 15 can also be arranged on the secondary sliding rail 11 and extend to the position of the secondary sliding member 5). When the secondary sliding member 5 slides to the specified position, the extension piece 15 can be against the secondary sliding rail 11 and drive the primary sliding member 4 to move backward, which can facilitate the secondary sliding member 5 to drive the secondary sliding rail 11 to retreat, and drive the primary sliding member 4 to slide and reset through the secondary sliding rail 11. The extension piece 15 can play an auxiliary role when the secondary sliding member 5 retreats, and can drive the primary sliding member 4 to reset, thereby reducing the elastic coefficient requirement of the elastic reset member 7.

[0028] A connecting seat 16 is provided on the backrest frame 3, and one end of the pull rod 9 close to the backrest frame 3 is connected to the connecting seat 16 and can rotate relative to the connecting seat 16. The elastic reset member 7 is a coil spring, one end of which is fixedly arranged on the base 1, and the other end is connected to the swing arm 6. When the pull rod 9 pulls the connecting seat 16 (when the cushion frame 2 is stationary), the backrest frame 3 can be driven to rotate relatively and lie down. At this time, the coil spring will be relatively tightened with the rotation of the swing arm 6. When the pull rod 9 retreats and resets, the coil spring can drive the swing arm 6 to reset, thereby driving the backrest frame 3 to automatically stand up. The use of the connecting seat 16 in combination with the pull rod 9 can make it more convenient during assembly, and the pull rod 9 can rotate relative to the connecting seat 16 to adapt to the angle changes during its activity.

[0029] The base 1 is also provided with a damping member 17 at the position of the swing arm 6 to limit its automatic lying down. When the backrest frame 3 lies down, it will drive the swing arm 6 to rotate. When the damping member 17 acts on the swing arm 6, it can not only provide a buffering force, but also cooperate with the coil spring to prevent the backrest frame 3 from lying down automatically, which will play a role of auxiliary support.

[0030] The damping member 17 is an elastic compression spring sheet (of course, the damping member 17 can also be other elastic members such as a coil spring, as long as the swing arm can rotate normally under the action of external force). The swing arm 6 is provided with a pressing surface 61 that cooperates with the elastic compression spring sheet. The cooperation between the elastic compression spring sheet and the pressing surface 61 can further prevent the swing arm 6 from rotating, thereby playing a damping role, which can assist the coil spring in stabilizing the backrest frame 3.

[0031] The primary slide rails 10 and the secondary slide rails 11 are each provided with two groups, and the primary sliding members 4 and the secondary sliding members 5 are also provided with two groups. The primary slide rails 10 and the primary sliding members 4 are provided in a one-to-one correspondence, and the secondary slide rails 11 and the secondary sliding members 5 are provided in a one-to-one correspondence. A reinforcing rod 18 is provided between the two secondary sliding members 5, and the output ends of the pull rod 9 and the electric push rod 8 are both connected to the reinforcing rod 18, which can increase the stability of sliding. The use of the reinforcing rod 18 can not only increase the stability of the structure, but also facilitate the simultaneous sliding of the two sliding members, prevent dislocation due to sliding, and have a reasonable structural layout.

Claims

1. A pull rod sequential movable backrest frame zero space lying mechanism, comprising a base (1), a cushion frame (2) that can slide forward and backward relative to the base (1), and a backrest frame (3) that can rotate relative to the cushion frame (2) for lying, characterized in that: The seat cushion frame (2) further comprises a primary sliding member (4) and a secondary sliding member (5), wherein the seat cushion frame (2) is fixedly arranged on the primary sliding member (4), the primary sliding member (4) is slidably arranged on the base (1), and the secondary sliding member (5) is slidably arranged on the primary sliding member (4), and swing arms (6) are swingably arranged on opposite sides of the seat cushion frame (2) corresponding to the backrest frame (3), and the swing arm (6) is fixedly arranged on the backrest frame (3) on one side facing the backrest frame (3), and the seat cushion frame (2) is also provided with a spring for driving the swing arm (6) to rotate and reset. The base (1) is provided with an electric push rod (8), the output end of the electric push rod (8) acts on the secondary sliding member (5), and the secondary sliding member (5) is also provided with a pull rod (9), the other end of the pull rod (9) is pulled on the backrest frame (3), and the base (1) is also provided with a blocking member for blocking the sliding displacement of the primary sliding member (4). When the primary sliding member (4) is located at the blocking member position, the secondary sliding member (5) can slide relative to the primary sliding member (4), so that the pull rod (9) pulls the backrest frame (3) to rotate and lie down.

2. The pull rod sequential movable backrest frame zero space lying mechanism according to claim 1, characterized in that: It also includes a primary slide rail (10) and a secondary slide rail (11), wherein the primary slide rail (10) is arranged on the base (1), the primary sliding member (4) is slidably arranged on the primary slide rail (10), the secondary slide rail (11) is fixedly arranged on the primary sliding member (4), and the secondary sliding member (5) is slidably arranged on the secondary slide rail (11).

3. The pull rod sequential movable backrest frame zero space lying mechanism according to claim 2, characterized in that: The blocking member is a first blocking piece (12) arranged on the primary slide rail (10), the first blocking piece (12) is located on the track of the primary sliding member (4) moving forward, and a second blocking piece (13) is also arranged on the primary slide rail (10), the first blocking piece (12), the second blocking piece (13) and the primary slide rail (10) cooperate to form a sliding section (14) for limiting the sliding movement of the primary sliding member (4).

4. A rod sequentially movable backrest frame zero-space lying mechanism according to claim 2 or 3, characterized in that: The secondary sliding member (5) is provided with an extension piece (15) extending to the position of the secondary slide rail (11); when the secondary sliding member (5) slides to a specified position, the extension piece (15) can abut against the secondary slide rail (11) and drive the primary sliding member (4) to move backward.

5. A rod sequentially movable backrest frame zero-space lying mechanism according to claim 1, 2 or 3, characterized in that: A connecting seat (16) is provided on the backrest frame (3); one end of the pull rod (9) close to the backrest frame (3) is connected to the connecting seat (16) and can rotate relative to the connecting seat (16); the elastic reset member (7) is a coil spring; one end of the coil spring is fixedly provided on the base (1) and the other end is connected to the swing arm (6).

6. The pull rod sequentially movable backrest frame zero space lying mechanism according to claim 5, characterized in that: The base (1) is also provided with a damping member (17) at the position of the swing arm (6) for limiting the automatic lying down of the swing arm.

7. The pull rod sequential movable backrest frame zero space lying mechanism according to claim 6, characterized in that: The damping member (17) is an elastic compression spring sheet, and the swing arm (6) is provided with a pressing surface (61) that cooperates with the elastic compression spring sheet.

8. The pull rod sequentially movable backrest frame zero space lying mechanism according to claim 4, characterized in that: The first-level slide rail (10) and the second-level slide rail (11) are each provided with two groups, and the first-level sliding member (4) and the second-level sliding member (5) are also provided with two groups. The first-level slide rail (10) and the first-level sliding member (4) are provided in a one-to-one correspondence, and the second-level slide rail (11) and the second-level sliding member (5) are provided in a one-to-one correspondence. A reinforcing rod (18) is provided between the two second-level sliding members (5), and the output ends of the pull rod (9) and the electric push rod (8) are both connected to the reinforcing rod (18).

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