Pull rod sequential moving type chair frame and control method thereof

Abstract

The invention discloses a pull rod sequential moving type chair frame and a control method thereof.The pull rod sequential moving type chair frame 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, and a swing arm is arranged on the cushion frame; 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. Furthermore, the backrest frame is driven by the pull rod to lie down relatively, so that the function that the single driving mechanism drives the backrest frame to move forwards and lie down is achieved, and the safety of the backrest frame in lying down is improved by adopting the matching of a clamping column and a clamping groove which are automatically tripped.

Description

Technical Field

[0001] The invention relates to the technical field of massagers, and in particular to a pull rod sequentially movable chair frame and a control method thereof. 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] 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 roller single-slide massage chair frame structure. However, the mechanism uses a single-slide dual-drive method, and its cost is relatively high. It is also necessary to control the working time of the corresponding driving parts separately, which leads to time difference in control and poor practicality.

[0004] And the backrest of the massage chair can usually be laid down or upright, so as to realize the switching between lying down and leaning back. However, the space behind the massage chair cannot be observed when it is lying down. When there are small animals, children or foreign objects blocking the way, it is easy to pinch the small animals or children. Summary of the invention

[0005] Purpose of the present invention: In order to overcome the defects of the prior art, the present invention provides a pull rod sequentially movable chair frame, 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. When a small animal or a child is pressed, the position of the card column and the card slot will be subject to resistance. Once the preset force is exceeded, the card column will be pulled out of the card slot, resulting in a tripping phenomenon, thereby preventing the backrest frame from lying further, and the safety factor is higher.

[0006] The invention discloses a pull rod sequentially movable chair frame, comprising a base, a seat cushion frame which can slide forward and backward relative to the base, and a backrest frame which 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, the base is provided with an electric push rod, 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 in 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; A connecting seat is provided on the backrest frame at a position corresponding to the pull rod, a slot is provided on the connecting seat, a post is provided on the pull rod at a position corresponding to the slot, the slot is provided with an opening for the post to slide into, and a flip frame is hingedly provided on the connecting seat, and one end of the flip frame extends to one side of the opening to form an anti-slip sheet for limiting the post from escaping from the slot, and an elastic adjustment structure for driving the anti-slip sheet to maintain an initial position is also provided on the connecting seat, when the backrest frame is blocked from lying down, a force is applied at the fitting point between the post and the slot, so that the post can drive the anti-slip sheet to move, and the post thereby escapes from the slot.

[0007] A further configuration of the present invention is that the elastic adjustment structure includes a torsion spring for driving the flip frame to flip clockwise and a compression spring for driving the flip frame to flip counterclockwise, the torsion spring is arranged on the connecting seat, and one end of the torsion spring abuts on the connecting seat, and the other end abuts on the flip frame, the flip frame includes a pressing end and a lifting end, an anti-slip sheet is arranged on the lifting end, the compression spring acts on the pressing end, and the connecting seat is also provided with an adjusting bolt for adjusting the compression amount of the compression spring, the adjusting bolt is threadedly matched with the connecting seat, the adjusting bolt is also provided with a limiting surface for limiting the rotation of the adjusting bolt, a clamp seat is arranged on the pressing end at a position corresponding to the limiting surface, and the clamp seat is detachably connected with a clamp for cooperating with the limiting surface to limit the rotation of the adjusting bolt.

[0008] According to a further configuration of the present invention, a fall-stopping hook is provided on the flip frame below the clamping column, and a guide surface for guiding the clamping column to enter the fall-stopping hook is provided on the anti-slip sheet.

[0009] According to a further configuration of the present invention, the flip frame is also provided with an abutment piece that flips synchronously therewith, a proximity switch is provided on the connecting seat at a position corresponding to the abutment piece, the proximity switch interacts with the electric push rod, and a limit rod is provided on the connecting seat above the abutment piece.

[0010] The present invention is further provided with a tension spring for keeping the card post in the open position, one end of the tension spring is fixed on the connecting seat, and the other end is fixed on the pull rod, the anti-drop sheet is vertically arranged to form a groove on the flip frame, the card post is located in the groove, and the groove is provided with a blocking surface for limiting the card post from being pulled out upward According to a further configuration of the present invention, a spring sheet for limiting the post from escaping from the slot is provided at a position corresponding to the post on the connection seat, and the spring sheet is erected on one side of the opening to extend the height of one side of the slot.

[0011] A further arrangement of the present invention further includes a primary slide rail and a secondary slide rail, wherein the primary slide rail is arranged on a base, the primary slide member is slidably arranged on the primary slide rail, the secondary slide rail is fixedly arranged on the primary slide member, and the secondary slide member is slidably arranged on the secondary slide rail, and the blocking member is a first blocking piece arranged on the primary slide rail, the first blocking piece is located on the forward trajectory of the primary slide member, and the primary slide rail is also provided with a second blocking piece, the first blocking piece, the second blocking piece and the primary slide rail cooperate to form a sliding section for limiting the sliding of the primary slide member, the primary slide rail and the secondary slide rail are both provided with two groups, the primary slide member and the secondary slide member are also provided with two groups, the primary slide rail and the primary slide member are arranged one-to-one correspondingly, the secondary slide rail and the secondary slide member are arranged one-to-one correspondingly, and a reinforcing rod is arranged between the two secondary slide members, and the output ends of the pull rod and the electric push rod are both connected to the reinforcing rod.

[0012] According to a further configuration of the present invention, an extension piece extending to the position of the secondary slide rail is provided on the secondary slide member. 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.

[0013] According to a further configuration of the present invention, the elastic return member is a coil spring, one end of which is fixedly arranged on the base, and the other end is connected to the swing arm. The base is also provided with a lying-down damping force at the swing arm position. The damping member is an elastic pressing plate, and the swing arm is provided with a pressing surface that cooperates with the elastic pressing plate.

[0014] The beneficial effects of the present invention are as follows: (1) the operation of 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 fixedly provided on the primary sliding member, so at this time the primary sliding member can slide forward together with the secondary sliding member. 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, so that the seat cushion frame and the backrest frame also stop 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.

[0015] (2) When the backrest frame lies down and presses on a person or object, this position will be used as a fulcrum, thereby applying force to the joint between the pull rod and the connecting seat. When the resistance reaches a certain value, the clamping column applies force to the anti-slip plate. At this time, the flip frame rotates, so that the anti-slip plate moves to avoid it, and the clamping column can be separated from the slot, resulting in a tripping phenomenon. When the electric push rod works further, it pulls the pull rod to slide in vain, thereby preventing the backrest frame from lying down further, thereby achieving the effect of mechanical safety tripping. When the tripped clamping column needs to be reset, it can be reset manually. Or the electric push rod moves backward to slide the card column from the opening into the card slot. When the backrest frame is not pressed by a person or object, the pull rod moves forward to pull the connecting seat, so that the backrest frame can be flipped over and lie down. At this time, the inner wall of the card slot and the blocking cooperation of the anti-slip sheet can prevent the card column from falling out of the card slot, making it more stable when pulling and setting. The anti-slip sheet adopts an elastic adjustment structure for adjustment, which can drive the elastic adjustment structure to deform when an external force acts, so that the card column can be separated from the card slot, which can pull the backrest frame to lie down without affecting the normal release of the card column.

[0016] Another object of the present invention is a control method for a pull-rod sequentially movable chair frame, characterized in that it is applied to a pull-rod sequentially movable chair frame as described in any one of claims 1 to 9, comprising: In the initial state, the backrest is in an upright state, and the clamping column is located in the clamping slot; During the starting and lying down process, when the user controls the electric push rod to work, the electric push rod drives the secondary sliding member to slide forward, and at the same time, the pull rod will pull the connecting seat forward to move the primary sliding member forward. When the backrest frame lies down and encounters a foreign object, the card column accepts it. When the force reaches a certain threshold, the card column will act on the anti-slip sheet to make the flip frame rotate, thereby achieving the effect of avoidance. At this time, the card column can automatically escape from the card slot. At this time, the backrest frame loses the pulling force of the pull rod, and the elastic reset member drives the backrest frame to stand up relatively. When the backrest frame lies down and does not encounter a foreign object, the primary sliding member slides to the specified position and is blocked by the blocking member to prevent the primary sliding member from further extending. At the same time, the secondary sliding member slides relative to the primary sliding member, which can drive the pull rod to further extend, so that the pull rod can pull the connecting seat and drive the backrest frame to lie down relatively. To reset the tripping, when the card column escapes from the card slot during the starting and lying down process, the electric push rod moves in the opposite direction to reduce the distance between the card column and the card slot and align the card column with the opening of the card slot. Furthermore, the card column is pushed into the card slot manually or the pull rod is further driven backward by the electric push rod to push the card column into the card slot to achieve tripping reset. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a stereogram of the present invention; Figure 2 for Figure 1 Another perspective structural diagram; Figure 3 for Figure 2 Schematic diagram of some structures; Figure 4 This is a schematic structural diagram of the backrest frame of the present invention when lying down; Figure 5 This is a schematic diagram of the matching structure of the pull rod and the connecting seat of the present invention; Figure 6 for Figure 5 A schematic diagram of the reference with shrapnel installed; Figure 7 This is a schematic diagram of the matching structure of the pull rod and the connecting seat of the present invention; Figure 8 It is a schematic diagram of the position of the tension spring of the present invention; Fig. 9 for Figure 5 Another perspective structural diagram; Fig.10 for Fig. 9 Another perspective structural diagram; Fig.11 This is a schematic diagram of the structure of the turning frame of the present invention; Fig.12 It is a schematic diagram of the pull rod structure of the present invention; Fig.13 It is a schematic diagram of the structure of the sliding section of the present invention; Fig.14 This is a motion principle diagram of the present invention; Fig.15 for Figure 2 Enlarged view of part a; Fig.16 for Figure 3 Part b enlarged view; Fig.17 for Figure 6 Enlarged view of local c; Fig.18 for Figure 7 Local enlarged image; Fig.19 for Fig.10 Local f magnified image; Fig. 20 It is a control flow diagram of the present invention. DETAILED DESCRIPTION

[0018] 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. Example

[0019] The present invention discloses a pull rod sequential movable chair frame, comprising a base 1, a seat 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 seat 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 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. The seat cushion frame 2 is provided with swing arms 6 on opposite sides corresponding to the backrest frame 3, and the swing arms 6 are fixed toward one side of the backrest frame 3. It is fixedly arranged 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 10 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 located at the position of the blocking member 10, 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.

[0020] By adopting the above scheme, 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 reset force of the elastic reset 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 provided on the cushion frame 2, and the cushion frame 2 is further fixedly provided 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 10, the blocking member 10 plays an obstructive role to prevent the primary sliding member 4 from continuing to slide, so that the cushion frame 2 and the backrest frame 3 also stop sliding forward. 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, and 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 sequence, 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.

[0021] A connecting seat 11 is provided on the backrest frame 3 at a position corresponding to the pull rod 9, a slot 12 is provided on the connecting seat 11, a column 13 is provided on the pull rod 9 at a position corresponding to the slot 12, the slot 12 is provided with an opening 14 for the column 13 to slide into, and a flip frame 15 is hingedly provided on the connecting seat 11, and one end of the flip frame 15 extends to one side of the opening 14 to form an anti-slip sheet 16 for limiting the column 13 from escaping from the slot 12, and an elastic adjustment structure 17 for driving the anti-slip sheet 16 to maintain an initial position is also provided on the connecting seat 11. When the backrest frame 3 is blocked from lying down, the matching position of the column 13 and the slot 12 is subjected to force, so that the column 13 can drive the anti-slip sheet 16 to move, and the column 13 thereby escapes from the slot 12.

[0022] When the backrest 3 lies down and presses on a person or an object, this position will be used as a fulcrum, so that a force will be applied to the matching position of the pull rod 9 and the connecting seat 11. When the resistance reaches a certain value, the clamping column 13 will apply a force to the anti-slip sheet 16. At this time, the flip frame 15 rotates, so that the anti-slip sheet 16 can be moved to avoid it, and the clamping column 13 can be separated from the clamping slot 12, resulting in a tripping phenomenon. When the electric push rod 8 works further, it pulls the pull rod 9 to slide in vain, thereby preventing the backrest 3 from lying down further, thereby achieving the effect of mechanical safety tripping. When the tripped clamping column 13 needs to be reset, it can be reset manually or by electric push rod 8. The rod 8 moves backward to slide the card column 13 from the opening 14 into the card slot 12. When the backrest frame 3 is not pressed by a person or object, the pull rod 9 moves forward to pull the connecting seat 11, so that the backrest frame 3 can be turned over and lie down. At this time, the inner wall of the card slot 12 and the blocking cooperation of the anti-slip sheet 16 can prevent the card column 13 from falling out of the card slot 12, making it more stable when pulled. The anti-slip sheet 16 adopts an elastic adjustment structure 17 for adjustment, which can drive the elastic adjustment structure 17 to deform when an external force acts, so that the card column 13 can be separated from the card slot 12, which can pull the backrest frame 3 to lie down without affecting the normal release of the card column 13.

[0023] The elastic adjustment structure 17 includes a torsion spring 171 for driving the flip frame 15 to flip clockwise and a compression spring 172 for driving the flip frame 15 to flip counterclockwise. The torsion spring 171 is arranged on the connecting seat 11, and one end of the torsion spring 171 abuts on the connecting seat 11, and the other end abuts on the flip frame 15. The flip frame 15 includes a pressing end 151 and a lifting end 152 (the flip frame 15 at this time is equivalent to a seesaw), the anti-slip sheet 16 is arranged on the lifting end 152, the compression spring 172 acts on the pressing end 151, and the connecting seat 11 is also provided with a pressure regulating end 151. The adjusting bolt 18 of the spring 172 is threadedly matched with the connecting seat 11, and the turning frame 15 can be driven to rotate to one side through the torsion spring 171. The pressing end 151 is further pressed by the compression spring 172 to overcome part of the torque of the torsion spring 171, and the turning frame 15 is adjusted to rotate in the opposite direction, thereby adjusting the rotation angle of the turning frame 15, and the position of the anti-slip sheet 16 can be changed, thereby adjusting the threshold of its release force (the release force is the resistance required for the card column 13 to disengage from the card slot 12), and the compression spring 172 can adjust the pressure by adjusting the adjusting bolt 18.

[0024] The adjusting bolt 18 is also provided with a limiting surface 181 for limiting the rotation of the adjusting bolt 18 , and a clamp seat 19 is provided on the pressing end 151 at a position corresponding to the limiting surface 181 , and a clamp 191 is detachably connected to the clamp seat 19 for cooperating with the limiting surface 181 to limit the rotation of the adjusting bolt 18 .

[0025] The anti-falling hook 20 is provided on the flip frame 15 below the card column 13, and the anti-falling sheet 16 is provided with a guide surface for guiding the card column 13 to enter the anti-falling hook 20. When the card column 13 is separated from the card slot 12 and the disengagement phenomenon occurs, one end of the card column 13 will fall off relatively, thereby causing unnecessary trouble during manual or electric resetting. The fallen card column 13 can be caught by the anti-falling hook 20, so as to ensure that the card column 13 is on one side of the opening 14, and the cooperation of the guide surface can facilitate the card column 13 to be reset to the card slot 12 and enter the anti-falling hook 20. Of course, a tension spring 21 can be provided for keeping the card column 13 in the position of the opening 14, one end of the tension spring 21 is fixed on the connecting seat 11, and the other end is fixed on the pull rod 9. When the card column 13 is separated from the card slot 12, the tension spring 21 can pull the pull rod 9, thereby ensuring that the position of the card column 13 is located near the opening 14, so as to facilitate the later resetting of the card column 13 into the card slot 12.

[0026] The adjusting bolt 18 is also provided with a limiting surface 181 for limiting the rotation of the adjusting bolt 18, and a clamp seat 19 is provided on the pressing end 151 at a position corresponding to the limiting surface 181, and a clamp 191 is detachably connected to the clamp seat 19 for cooperating with the limiting surface 181 to limit the rotation of the adjusting bolt 18 (it is most preferred to provide a blocking plane on the clamp 191). Because the adjusting bolt 18 adopts threaded cooperation, the adjusting bolt 18 is easy to rotate by itself, thereby affecting the stability. The clamp 191 is abutted against the limiting surface 181 to prevent the adjusting bolt 18 from rotating by itself, and the clamp 191 is detachably connected to the clamp seat 19, which is convenient to assemble and will not affect the normal adjustment of the adjusting bolt 18.

[0027] The flip frame 15 is also provided with an abutment piece 22 that flips synchronously with it, and a proximity switch 23 is provided on the connecting seat 11 at a position corresponding to the abutment piece 22 (the proximity switch 23 can be one of the two normally open switches or normally closed switches, or a combination of two). The proximity switch 23 interacts with the electric push rod 8 (specifically, the interaction can be through a control circuit, which belongs to the prior art and does not involve procedural improvements, and will not be introduced in detail in this article). When the flip frame 15 rotates, the abutment piece 22 can trigger the proximity switch 23, thereby controlling the electric push rod 8 to stop working, or controlling the electric push rod 8 to reverse operation, thereby further improving the safety factor.

[0028] The pull rod 9 is provided with a slide slot hole 24 arranged along its length direction, and the card column 13 is guided to slide on the slide slot hole 24, and the pull rod 9 is also provided with a buffer spring 25, one end of the buffer spring 25 is fixed on the pull rod 9, and the other end is directly or indirectly connected to the card column 13. When the card column 13 is out of the slot 12, the buffer spring 25 can play a buffering role, and the slide slot hole 24 can facilitate the adaptive sliding of the card column 13.

[0029] The anti-drop sheet 16 is erected on the flip frame 15 to form a groove, and the card column 13 is located in the groove. The groove is provided with a blocking surface 26 (the blocking surface 26 is most preferably arc-shaped) for limiting the card column 13 from being pulled out upward. The cooperation of the blocking surface 26 can ensure the direction in which the card column 13 is released, so that it can enter the anti-fall return hook 20 after being released.

[0030] The connecting seat 11 is also provided with a spring piece 27 corresponding to the position of the card column 13 to limit the connection seat 11 from escaping from the card slot 12. The spring piece 27 is erected on one side of the opening 14 to extend the height of one side of the card slot 12. Because the card column 13 and the card slot 12 cooperate with each other, there are certain requirements for the pulling direction of the pull rod 9. By setting the spring piece 27, the height of one side of the card slot 12 can be extended. At this time, the pull rod 9 can be pulled horizontally and longitudinally or horizontally. Only relying on the obstruction of the anti-slip sheet 16, the pull rod 9 is only suitable for horizontal pulling.

[0031] A limit rod 28 is provided on the connection seat 11 above the abutting piece 22 (the abutting piece 22 is most preferably made of a metal spring sheet that can be relatively deformed and not easily damaged), which can limit the flipping angle of the abutting piece 22, thereby protecting the proximity switch 23.

[0032] The first and second slide members 4 and 5 are also provided with a first-level slide rail 29 and a second-level slide rail 30. The first and second slide rails 29 and 30 are provided with a first-level slide rail 29 and a second-level slide rail 30, respectively. The first and second slide rails 29 and 30 are provided with a first-level slide rail 29 and a second-level slide rail 30, respectively. The first and second slide rails 29 and 30 are provided with a first-level slide rail 29 and a second-level slide rail 30, respectively. The first and second slide rails 29 and 30 are provided with a first-level slide rail 29 and a second-level slide rail 30, respectively. The first and second slide rails 29 and 30 are provided with a first-level slide rail 29 and a second-level slide rail 30, respectively. The second-level slide rail 30 is provided on the first-level slide member 4, so that the second-level slide member 5 can slide relative to the first-level slide member 4 and can drive the first-level slide member 4 to reset. The first and second slide members 4 and 5 can be guided to slide by the first and second slide members 4 and 5.

[0033] The blocking member 10 is a first blocking piece arranged on the primary slide rail 29 (of course, the blocking member can also be a blocking rod or a blocking block). The first blocking piece is located on the forward trajectory of the primary sliding member 4, and the primary slide rail 29 is also provided with a second blocking piece 31. The first blocking piece, the second blocking piece 31 and the primary slide rail 29 cooperate to form a sliding section for the primary sliding member 4 to slide and limit the first sliding member 4. The first blocking piece can prevent the primary sliding member 4 from separating from the primary slide rail 29, 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 can prevent the primary sliding member 4 from moving out, making it more stable when in use.

[0034] The secondary sliding member 5 is provided with an extension piece 32 extending to the position of the secondary sliding rail 30 (of course, the extension piece 32 can also be set on the secondary sliding rail 30 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 32 can be against the secondary sliding rail 30 and drive the primary sliding member 4 to move backward, which can facilitate the secondary sliding member 5 to drive the secondary sliding rail 30 to retreat, and drive the primary sliding member 4 to slide and reset through the secondary sliding rail 30. In addition, the extension piece 32 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.

[0035] 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 11 (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 as the swing arm 6 rotates. 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 11 in conjunction with the pull rod 9 can make it more convenient during assembly, and the pull rod 9 can rotate relative to the connecting seat 11 to adapt to the angle changes during its activity.

[0036] The base 1 is also provided with 33 at the position of the swing arm 6 to provide a lying-down damping force. When the backrest frame 3 lies down, it will drive the swing arm 6 to rotate. When the damping member 33 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.

[0037] The damping member 33 is an elastic pressure plate (of course, the damping member 33 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 34 that cooperates with the elastic pressure plate. The cooperation between the elastic pressure plate and the pressing surface 34 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.

[0038] The primary slide rails 29 and the secondary slide rails 30 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 29 and the primary sliding members 4 are provided in a one-to-one correspondence, and the secondary slide rails 30 and the secondary sliding members 5 are provided in a one-to-one correspondence. A reinforcing rod 35 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 35, which can increase the stability of sliding. The use of the reinforcing rod 35 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. Example

[0039] A control method for a pull-rod sequentially movable chair frame, applied to a pull-rod sequentially movable chair frame of embodiment 1, comprises: In the initial state, the backrest is in an upright state, and the clamping column is located in the clamping slot; During the starting and lying down process, when the user controls the electric push rod to work, the electric push rod drives the secondary sliding member to slide forward, and at the same time, the pull rod will pull the connecting seat forward to move the primary sliding member forward. When the backrest frame lies down and encounters a foreign object, the card column accepts it. When the force reaches a certain threshold, the card column will act on the anti-slip sheet to make the flip frame rotate, thereby achieving the effect of avoidance. At this time, the card column can automatically escape from the card slot. At this time, the backrest frame loses the pulling force of the pull rod, and the elastic reset member drives the backrest frame to stand up relatively. When the backrest frame lies down and does not encounter a foreign object, the primary sliding member slides to the specified position and is blocked by the blocking member to prevent the primary sliding member from further extending. At the same time, the secondary sliding member slides relative to the primary sliding member, which can drive the pull rod to further extend, so that the pull rod can pull the connecting seat and drive the backrest frame to lie down relatively. To reset the tripping, when the card column escapes from the card slot during the starting and lying down process, the electric push rod moves in the opposite direction to reduce the distance between the card column and the card slot and align the card column with the opening of the card slot. Furthermore, the card column is pushed into the card slot manually to achieve tripping reset. To reset the tripping, the card column is pushed into the card slot manually or the pull rod is further driven backward by the electric push rod to push the card column into the card slot.

Claims

1. A pull rod sequential movable chair frame, 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), characterized in that: The seat cushion frame (2) further comprises a primary sliding member (4) and a secondary sliding member (5); 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); the secondary sliding member (5) is slidably arranged on the primary sliding member (4); swing arms (6) are swingably arranged on opposite sides of the seat cushion frame (2) corresponding to the backrest frame (3); the swing arm (6) is fixedly arranged on the backrest frame (3) on one side facing the backrest frame (3); and an elastic reset member for driving the swing arm (6) to rotate and reset is also arranged on the seat cushion frame (2). (7), 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 (10) for blocking the sliding displacement of the primary sliding member (4). When the primary sliding member (4) is located at the blocking member (10) 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; A connecting seat (11) is provided on the backrest frame (3) at a position corresponding to the pull rod (9), a slot (12) is provided on the connecting seat (11), a post (13) is provided on the pull rod (9) at a position corresponding to the slot (12), an opening (14) is provided on the slot (12) for the post (13) to slide into, and a flip frame (15) is hingedly provided on the connecting seat (11), and one end of the flip frame (15) extends to one side of the opening (14) to form an anti-slip sheet (16) for limiting the post (13) from slipping out of the slot (12), and an elastic adjustment structure (17) for driving the anti-slip sheet (16) to maintain an initial position is also provided on the connecting seat (11), when the backrest frame (3) is blocked from lying down, a force is applied to the joint between the post (13) and the slot (12), so that the post (13) can drive the anti-slip sheet (16) to move, and the post (13) thereby slips out of the slot (12).

2. The pull rod sequential movable chair frame according to claim 1, characterized in that: The elastic adjustment structure (17) comprises a torsion spring (171) for driving the flip frame (15) to flip clockwise and a compression spring (172) for driving the flip frame (15) to flip counterclockwise. The torsion spring (171) is arranged on the connecting seat (11), and one end of the torsion spring (171) abuts against the connecting seat (11), and the other end abuts against the flip frame (15). The flip frame (15) comprises a pressing end (151) and a lifting end (152). The anti-slip sheet (16) is arranged on the lifting end (152). The compression spring (172) acts on the An adjusting bolt (18) for adjusting the compression amount of the compression spring (172) is disposed on the pressing end (151) and the connecting seat (11). The adjusting bolt (18) is threadedly engaged with the connecting seat (11). A limiting surface (181) for limiting the rotation of the adjusting bolt (18) is disposed on the adjusting bolt (18). A clamp seat (19) is disposed at a position corresponding to the limiting surface on the pressing end (151). A clamp (191) for cooperating with the limiting surface (181) to limit the rotation of the adjusting bolt (18) is detachably connected to the clamp seat (19). The clamp seat (19) is provided with a clamp (191) for cooperating with the limiting surface (181) to limit the rotation of the adjusting bolt (18).

3. A pull rod sequential movable chair frame according to claim 1 or 2, characterized in that: The flip frame (15) is also provided with a fall-stopping hook (20) below the clamping column (13), and the anti-slip sheet (16) is provided with a guide surface for guiding the clamping column (13) to enter the fall-stopping hook (20).

4. The pull rod sequential movable chair frame according to claim 3, characterized in that: The flip frame (15) is also provided with an abutment sheet (22) that flips synchronously therewith, and a proximity switch (23) is provided on the connecting seat (11) at a position corresponding to the abutment sheet (22). The proximity switch (23) interacts with the electric push rod (9), and a limit rod (28) is provided on the connecting seat (11) above the abutment sheet (22).

5. The pull rod sequential movable chair frame according to claim 4, characterized in that: It also includes a tension spring (21) for keeping the clamping column (13) at the opening (14), one end of the tension spring (21) being fixed to the connecting seat (11), and the other end being fixed to the pull rod (9), the anti-slip sheet (16) being arranged vertically to form a groove on the flip frame (15), the clamping column (13) being located in the groove, and a blocking surface (26) for limiting the clamping column (13) from being pulled out upwards being provided on the groove.

6. A pull rod sequential movable chair frame according to claim 1 or 2, characterized in that: A spring sheet (27) is also provided on the connection seat (11) at a position corresponding to the clamping column (13) to limit the clamping column (13) from escaping from the clamping slot (12). The spring sheet (27) is vertically arranged on one side of the opening (14) so ​​as to extend the height of one side of the clamping slot (12).

7. A pull rod sequential movable chair frame according to claim 1 or 2, characterized in that: The invention also comprises a primary slide rail (29) and a secondary slide rail (30), wherein the primary slide rail (29) is arranged on the base (1), the primary sliding member (4) is slidably arranged on the primary slide rail (29), the secondary slide rail (30) is fixedly arranged on the primary sliding member (4), and the secondary sliding member is slidably arranged on the secondary slide rail (30), the blocking member (10) is a first blocking piece arranged on the primary slide rail (29), the first blocking piece is located on the forward track of the primary sliding member (4), and the primary slide rail (29) is also provided with a second blocking piece (31), the first blocking piece, The second blocking piece (31) and the primary slide rail (29) cooperate to form a sliding section for limiting the sliding movement of the primary slide member (4). The primary slide rail (29) and the secondary slide rail (30) are each provided with two groups, and the primary slide member (4) and the secondary slide member (5) are also provided with two groups. The primary slide rail (29) and the primary slide member (4) are provided in a one-to-one correspondence, and the secondary slide rail (30) and the secondary slide member (5) are provided in a one-to-one correspondence. A reinforcing rod (35) is provided between the two secondary slide members (5), and the output ends of the pull rod (9) and the electric push rod (8) are both connected to the reinforcing rod (35).

8. The pull rod sequential movable chair frame according to claim 7, characterized in that: The secondary sliding member (5) is provided with an extension piece (32) extending to the position of the secondary slide rail (30); when the secondary sliding member (5) slides to a specified position, the extension piece (32) can abut against the secondary slide rail (30) and drive the primary sliding member (4) to move backward.

9. The pull rod sequential movable chair frame according to claim 8, characterized in that: The elastic return member (7) is a coil spring, one end of which is fixedly arranged on the base (1), and the other end of which is connected to the swing arm (6). The base (1) is also provided with a member (33) at the position of the swing arm (6) for providing a lying-down damping force. The damping member (33) is an elastic pressing sheet, and the swing arm (6) is provided with a pressing surface (34) that cooperates with the elastic pressing sheet.

10. A control method for a pull rod sequential movable chair frame, characterized in that: A pull rod sequentially movable chair frame as described in any one of claims 1 to 9, comprising: In the initial state, the backrest frame (3) is in an upright state, and the clamping column (13) is located in the clamping slot (12); During the start-up and lying-down process, when the user controls the electric push rod (8) to work, the electric push rod (8) drives the secondary sliding member (5) to slide forward. At the same time, the pull rod (9) pulls the connecting seat (11) forward to move the primary sliding member (4) forward. When the backrest (3) lies down and encounters foreign objects, the clamping column (13) accepts it. When the force reaches the threshold, the clamping column (13) applies force to the anti-slip sheet (16) to rotate the flip frame (15), thereby achieving the effect of avoiding. At this time, the clamping column (13) can automatically slip out of the clamping slot (12). When the backrest (3) loses the pulling force of the pull rod (9), the elastic reset member (7) drives the backrest (3) to stand up relatively. When the backrest (3) lies down without encountering any foreign matter, the primary sliding member (4) slides to a specified position and is blocked by the blocking member (10) to prevent the primary sliding member (4) from further extending. At the same time, the secondary sliding member (5) slides relative to the primary sliding member (4), thereby driving the pull rod (9) to further extend, so that the pull rod (9) can pull the connecting seat (11) and drive the backrest (3) to lie down relatively. Disconnection reset: when the card column (13) is disengaged from the card slot (12) during the start-up and lying-down process, the electric push rod (8) moves in the opposite direction and makes the card column (13) align with the opening (14) of the card slot (12). Further, the card column (13) is pushed into the card slot (12) manually or the electric push rod (8) further drives the pull rod (9) to move backward to push the card column (13) into the card slot (12), thereby realizing the disconnection reset.

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