A fore-aft adjustable seat chassis

Abstract

The utility model discloses a seat chassis of front -and -back adjustment, including roof support, support and movable frame, the front end of support is through first axle body and the front end rotation connection of roof support, the rear end of roof support is through second axle body and the front end rotation connection of movable frame, the rear end of support is connected with movable frame through torsional spring, still include angle adjusting mechanism, and angle adjusting mechanism is used for adjusting the angle of movable frame, still include front -and -back adjustment mechanism, and front -and -back adjustment mechanism includes horizontal sliding slot and guide bolt body, and guide bolt body includes first cushion block and first peg head, and the middle part of first cushion block is equipped with recess part, thereby reduces the contact surface, and movement is more smooth. Angle adjusting mechanism, height adjusting mechanism and front -and -back adjustment mechanism all are through the operation of pull line, and operation is more convenient, and the setting of position is more flexible.

Description

Technical Field

[0001] This utility model relates to the field of seat accessories technology, and in particular to a seat chassis that can be adjusted forward and backward. Background Technology

[0002] Existing seats offer fore-and-aft adjustment. Some seats use ball bearing guides for this adjustment, but these are relatively expensive. Others use guide posts and elongated holes, resulting in a larger contact area, higher friction, and less smooth movement. Furthermore, existing adjustment mechanisms often use metal rods for operation, which is inconvenient, and the position of these rods can easily interfere with other structures, making design and assembly difficult. Utility Model Content

[0003] The purpose of this utility model is to provide a seat chassis that can be adjusted forward and backward. The forward and backward adjustment mechanism includes a horizontal sliding groove and a guide bolt. The guide bolt includes a first pad and a first bolt head. The first pad has a recessed part in the middle, thereby reducing the contact surface and making the movement smoother.

[0004] To achieve this objective, the present invention adopts the following technical solution: An adjustable seat chassis, comprising a top frame, a support frame, and a movable frame; The front end of the bracket is rotatably connected to the front end of the top frame via the first shaft; The rear end of the top frame is rotatably connected to the front end of the movable frame via a second shaft; The rear end of the bracket is connected to the movable frame via a torsion spring; It also includes an angle adjustment mechanism, which is used to adjust the angle of the movable frame; It also includes a front and rear adjustment mechanism, which includes a horizontal sliding plate, a guide bolt and a locking element, and the horizontal sliding plate is provided with a horizontal sliding groove. The top frame is provided with a guide bolt that cooperates with the horizontal sliding groove; the guide bolt includes a first pad and a first bolt head, and the first pad has a recess in the middle; The locking element is located on one side of the top frame and can move vertically. The horizontal sliding plate is provided with multiple second-position holes that cooperate with the locking element.

[0005] In some embodiments, the front-to-back adjustment mechanism further includes a first rubber block and a first screw; The lower end of the locking component is connected to the first rubber block, and the first screw is located on one side of the first rubber block and screwed to the lower end of the locking component. The side wall of the top frame is provided with a side hole that mates with the column of the first screw. The side hole is a vertical strip.

[0006] In some embodiments, the front and rear adjustment mechanism further includes a third reset spring, a third pull cable, and a third button; One end of the third pull wire is connected to the third button, and the other end of the third pull wire is connected to the third bayonet of the first rubber block; The third return spring can drive the locking element to reset.

[0007] In some embodiments, the rear end of the bracket is provided with a fourth shaft, the fourth shaft is provided with a torsion spring, the first end of the torsion spring is connected to the rear end face of the bracket, and the second end of the torsion spring is connected to the third shaft of the movable frame.

[0008] In some embodiments, the angle adjustment mechanism includes a first button, a first pull cable, a sliding block, and a pin; One end of the first pull wire is connected to the first button, and the other end of the first pull wire is connected to the sliding block; The sliding block is provided with a sliding groove, and the bracket is provided with a guide rail that matches the sliding groove; the sliding block is connected to the pin. The side wall of the movable frame is provided with multiple first-position holes corresponding to the pins.

[0009] In some embodiments, the bracket is further provided with a guide hole that mates with the pin, the guide hole extending out of the side wall of the bracket, so that the pin can extend out of the side wall of the bracket.

[0010] In some embodiments, a first return spring is sleeved on the pin, and the first return spring is located between the sliding block and the guide hole; The other end of the first pull wire is connected to the first latch of the sliding block, and the other end of the first pull wire is provided with a first buffer spring.

[0011] In some embodiments, a height adjustment mechanism is also included, which includes a base, an arm, a second button, and a second pull cable; The base is located on one side of the first shaft hole of the bracket; One end of the arm is rotatably connected to the base; The arm body is equipped with a second bayonet, and the middle of the arm body is equipped with a pressure block; The arm body is positioned above the first shaft hole; One end of the second pull cable is connected to the second button, and the other end of the second pull cable is connected to the second bayonet. The other end of the second pull wire is equipped with a second reset spring.

[0012] In some embodiments, the bottom cover is provided with an upwardly protruding first buckle, and the bottom wall of the bracket is provided with a first buckle groove that mates with the first buckle; The front cover is provided with a second protruding buckle, and the top frame is provided with a second buckle groove that mates with the second protruding buckle; The bottom cover has a front baffle at one end near the front cover. The front baffle is located between the front cover and the bracket. The front baffle has a pin, and the bottom cover has a slot that mates with the pin.

[0013] The beneficial effects of this utility model are as follows: the front and rear adjustment mechanism includes a horizontal sliding groove and a guide bolt. The guide bolt includes a first pad and a first bolt head. The first pad has a recessed part in the middle, thereby reducing the contact surface and making the movement smoother.

[0014] The angle adjustment mechanism, height adjustment mechanism, and front-to-back adjustment mechanism are all operated by buttons and pull cables, making operation more convenient and position settings more flexible. Attached Figure Description

[0015] Figure 1 This is a structural diagram of a seat chassis that can be adjusted forward and backward according to this utility model; Figure 2 This is an exploded view of a seat chassis that can be adjusted forward and backward according to the present invention, omitting the bottom cover and the front cover; Figure 3 This is one of the exploded views of an adjustable seat chassis according to the present invention; Figure 4 This is the second exploded view of an adjustable seat chassis according to the present invention. Figure 5 This is a structural diagram of the angle adjustment mechanism of this utility model; Figure 6 This is a structural diagram of the height adjustment mechanism of this utility model; Wherein: 1-bottom cover; 11-first protruding buckle; 13-slot; 12-front baffle; 121-insertion post; 2-top frame; 21-second buckle groove; 22-through hole; 23-side hole; 3-bracket; 31-first shaft hole; 32-elongated hole; 33-rear end face; 36-guide rail; 37-guide hole; 4-movable frame; 41-first gear hole; 5-front cover; 51-second protruding buckle; 61-first shaft; 62-second shaft; 63-third shaft; 64-fourth shaft; 7-angle adjustment mechanism; 71-first button; 72-first pull cable; 73-first buffer spring; 74-sliding block; 741-first bayonet; 742-slide groove; 75-pin; 76-first reset spring; 77-first pull cable adjusting component; 8-height 81-Adjustment mechanism; 82-Base; 82-Arm; 821-Second bayonet; 822-Touch block; 83-Second button; 84-Second pull cable; 85-Second return spring; 86-Second pull cable adjusting component; 9-Torsion spring; 91-First end foot; 92-Second end foot; 10-Front and rear adjustment mechanism; 110-Horizontal sliding plate; 1101-Horizontal sliding groove; 1102-Second gear hole; 120-Guide bolt; 1201-First pad; 1202-Recess; 1203-First bolt head; 130-Locking component; 140-First screw; 150-Third return spring; 160-Third pull cable; 170-First rubber block; 1701-Third bayonet; 180-Third button; 190-Third pull cable adjusting component. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings.

[0017] refer to Figures 1 to 6 An adjustable seat chassis, comprising a top frame 2, a support 3 and a movable frame 4; The front end of the bracket 3 is rotatably connected to the front end of the top frame 2 via the first shaft 61; the front end of the bracket 3 is provided with an elongated hole 32 that mates with the first shaft 61, and the top frame 2 is provided with a corresponding shaft hole that mates with the first shaft 61.

[0018] The rear end of the top frame 2 is rotatably connected to the front end of the movable frame 4 via the second shaft 62; both the top frame 2 and the movable frame 4 are provided with corresponding shaft holes that cooperate with the second shaft 62.

[0019] The rear end of the bracket 3 is connected to the movable frame 4 via a torsion spring 9.

[0020] The top frame 2, the support 3, and the movable frame 4 form a rotating connection structure. The support 3 is provided with a first shaft hole 31, and the top end of the gas spring is connected to the first shaft hole 31; the movable frame 4 is connected to the chair back.

[0021] It also includes an angle adjustment mechanism 7, which is used to adjust the angle of the movable frame 4, thereby adjusting the angle of the chair back.

[0022] refer to Figure 2 and Figure 3 It also includes a front and rear adjustment mechanism 10, which includes a horizontal sliding plate 110, a guide bolt 120 and a locking member 130. The horizontal sliding plate 110 is provided with a horizontal sliding groove 1101; the horizontal sliding groove 1101 extends along the front and rear direction. The top frame 2 is provided with guide bolts 120 that cooperate with the horizontal sliding groove 1101. The guide bolts 120 include a first pad 1201 and a first bolt head 1203. The first pad 1201 has a recess 1202 in the middle. The first pad 1201 is located below the horizontal sliding groove 1101, and the first bolt head 1203 is located above the horizontal sliding groove 1101, forming a limiting and guiding structure. The arrangement of the first pad 1201 helps to reduce the contact area between the top frame 2 and the horizontal sliding plate 110, thereby improving the smoothness of the movement of the horizontal sliding plate 110. The recess 1202 in the middle of the first pad 1201 extends along the front-back direction, further improving the smoothness of the movement of the horizontal sliding plate 110. The first pad 1201 and the first bolt head 1203 can be connected by screws and fixed to the top frame 2 together by screws. There are four corresponding horizontal sliding grooves 1101 and guide bolts 120.

[0023] A locking member 130 is vertically movable and is located on one side of the top frame 2. The top frame 2 has a through hole 22 that mates with the locking member 130, allowing the upper end of the locking member 130 to extend out of the top frame 2. The horizontal sliding plate 110 has multiple second-position holes 1102 that mate with the locking member 130. The multiple second-position holes 1102 are arranged along the front-back direction, for example, there are 6 second-position holes 1102.

[0024] Thus, the horizontal sliding plate 110 is connected to the seat, thereby enabling adjustment of the seat's position in the fore-and-aft direction.

[0025] refer to Figure 2 and Figure 3 The front and rear adjustment mechanism 10 also includes a first rubber block 170 and a first screw 140; The lower end of the locking member 130 is connected to the first rubber block 170, and the first screw 140 is located on one side of the first rubber block 170. The first screw 140 is screwed to the lower end of the locking member 130. The side wall of the top frame 2 is provided with a side hole 23 that mates with the column of the first screw 140. The side hole 23 is a vertical strip.

[0026] Thus, the side hole 23 and the post of the first screw 140 form a guiding fit structure, which improves the accuracy and smoothness of the vertical movement of the locking member 130.

[0027] refer to Figure 2 and Figure 3 The front and rear adjustment mechanism 10 also includes a third reset spring 150, a third pull wire 160 and a third button 180; One end of the third pull wire 160 is connected to the third button 180, and the other end of the third pull wire 160 is connected to the third bayonet 1701 of the first rubber block 170. The third return spring 150 can drive the locking element 130 to reset.

[0028] Therefore, the third return spring 150 has a U-shaped, C-shaped, or semi-circular structure. One end of the third return spring 150 is connected to the column of the first screw 140, and the other end of the third return spring 150 is connected to the top frame 2 or the third pull cable adjusting component 190.

[0029] The third cable adjusting component 190 has a 90-degree bend, so that the third cable 160 can turn 90 degrees, thereby pulling the locking component 130 to move in the vertical direction.

[0030] When the seat's fore-and-aft position needs to be adjusted, the third button 180 pulls the third cable 160, which in turn pulls the first rubber block 170 downwards. The locking member 130 moves downwards and disengages from the second position hole 1102, allowing the horizontal sliding plate 110 to move forward and backward. Once the horizontal sliding plate 110 reaches its desired position, the third return spring 150 drives the locking member 130 upwards and inserts it into the corresponding second position hole 1102, locking the position of the horizontal sliding plate 110. This allows for position adjustment of the horizontal sliding plate 110. Therefore, adjusting the fore-and-aft position via the third button 180 and the third cable 160 is more convenient and offers greater flexibility in position settings.

[0031] refer to Figure 3 and Figure 4 The rear end of the support frame 3 is provided with a fourth shaft 64, and the fourth shaft 64 is provided with a torsion spring 9. The first end 91 of the torsion spring 9 is connected to the rear end face 33 of the support frame 3, and the second end 92 of the torsion spring 9 is connected to the third shaft 63 of the movable frame 4. The torsion spring 9 has a certain buffering effect, which can also be understood as: the torsion spring 9 can adjust its angle appropriately according to the user's weight, and has a certain comfort function.

[0032] refer to Figure 5 The angle adjustment mechanism 7 is used to adjust the angle of the movable frame 4, thereby adjusting the angle of the chair back. The angle adjustment mechanism 7 includes a first button 71, a first pull cable 72, a sliding block 74, and a pin 75; One end of the first pull wire 72 is connected to the first button 71, and the other end of the first pull wire 72 is connected to the slider 74; The sliding block 74 is provided with a sliding groove 742, and the bracket 3 is provided with a guide rail 36 that cooperates with the sliding groove 742, which helps to improve the smoothness of the movement of the sliding block 74; the sliding block 74 is connected to the pin 75; The side wall of the movable frame 4 is provided with a plurality of first stop holes 41 corresponding to the pin 75.

[0033] Therefore, the first button 71 drives the first pull wire 72, the first pull wire 72 pulls the sliding block 74 to move, thereby driving the pin 75 to move closer to the first gear hole 41 and insert into the corresponding first gear hole 41, thereby realizing the angle adjustment of the movable frame 4. The operation is more convenient and the position setting is more flexible.

[0034] refer to Figure 3 The first gear hole 41 has three holes, thus providing three adjustment angles. Of course, more first gear holes 41 can be adjusted as needed to meet different requirements.

[0035] refer to Figure 4 Two torsion springs 9 are provided, which provides better force distribution and greater stability.

[0036] refer to Figure 5 The bracket 3 is also provided with a guide hole 37 that cooperates with the pin 75, which helps to improve the smoothness of the movement of the pin 75; the guide hole 37 extends out of the side wall of the bracket 3, so that the pin 75 can extend out of the side wall of the bracket 3.

[0037] The pin 75 is fitted with a first return spring 76, which is located between the sliding block 74 and the guide hole 37; the first return spring 76 can push the sliding block 74 to perform a reset movement.

[0038] The other end of the first pull wire 72 is connected to the first latch 741 of the sliding block 74, and the other end of the first pull wire 72 is provided with a first buffer spring 73. The first buffer spring 73 helps to reduce the impact force and causes the first pull wire 72 to pull the sliding block 74 more evenly.

[0039] Therefore, the first button 71 is located on the side of the bracket 3 away from the first gear hole 41. The first pull cable 72 can be redirected by the first pull cable adjusting member 77. The 180-degree turn of the first pull cable adjusting member 77 causes the first pull cable 72 to turn 180 degrees, thereby pulling the sliding block 74 and the pin 75 to move towards the first gear hole 41.

[0040] refer to Figure 6 It also includes a height adjustment mechanism 8, which includes a base 81, an arm 82, a second button 83, and a second pull cable 84; The base 81 is located on one side of the first shaft hole 31 of the bracket 3; One end of the arm 82 is rotatably connected to the base 81, for example, by connecting the rotating shaft to the shaft hole; The arm body 82 is provided with a second bayonet 821, and the middle part of the arm body 82 is provided with a touch block 822; The arm body 82 is positioned above the first shaft hole 31; One end of the second pull wire 84 is connected to the second button 83, and the other end of the second pull wire 84 is connected to the second bayonet 821; The other end of the second pull wire 84 is provided with a second return spring 85.

[0041] Therefore, the second button 83 drives the second pull cable 84, which pulls the arm 82 downward, thereby driving the touch block 822 to press the switch of the air rod, driving the air rod to extend and retract, thus realizing height adjustment. The operation is more convenient and the position setting is more flexible.

[0042] The second cable 84 can be redirected by the second cable directional component 86. The 90-degree turn of the second cable directional component 86 causes the second cable 84 to turn upward by 90 degrees, thereby pulling the arm 82 to rotate downward.

[0043] refer to Figure 1 , Figure 3 and Figure 4 The bottom cover 1 is fastened to the bottom of the bracket 3; the front cover 5 is fastened to the front of the top frame 2. Thus, by setting the bottom cover 1 and the front cover 5, the bracket 3 and the top frame 2 are covered, improving aesthetics and safety.

[0044] The bottom cover 1 is provided with an upward protruding first buckle 11, and the bottom wall of the bracket 3 is provided with a first buckle groove that cooperates with the first buckle 11, thereby realizing convenient disassembly and connection.

[0045] refer to Figure 3 and Figure 4 The front cover 5 is provided with a second protrusion 51, and the top frame 2 is provided with a second buckle groove 21 that cooperates with the second protrusion 51, thereby realizing convenient disassembly and connection.

[0046] refer to Figure 3 and Figure 4 The bottom cover 1 has a front baffle 12 at one end near the front cover 5. The front baffle 12 is located between the front cover 5 and the bracket 3. The front baffle 12 has a post 121, and the bottom cover 1 has a slot 13 that mates with the post 121. The front baffle 12 shields the bracket 3 and the like.

[0047] The above description only discloses some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A seat chassis that can be adjusted forward and backward, characterized in that, It includes a top frame (2), a support frame (3), and a movable frame (4). The front end of the bracket (3) is rotatably connected to the front end of the top frame (2) via the first shaft (61); The rear end of the top frame (2) is rotatably connected to the front end of the movable frame (4) via a second shaft (62); The rear end of the bracket (3) is connected to the movable frame (4) via a torsion spring (9); It also includes an angle adjustment mechanism (7) for adjusting the angle of the movable frame (4); It also includes a front and rear adjustment mechanism (10), which includes a horizontal sliding plate (110), a guide bolt (120) and a locking member (130); The horizontal sliding plate (110) is provided with a horizontal sliding groove (1101); the top frame (2) is provided with a guide bolt (120) that cooperates with the horizontal sliding groove (1101); the guide bolt (120) includes a first pad (1201) and a first bolt head (1203), and the first pad (1201) has a recess (1202) in the middle; The locking member (130) is vertically movable and is provided on one side of the top frame (2). The horizontal sliding plate (110) is provided with a plurality of second stop holes (1102) that cooperate with the locking member (130).

2. The adjustable seat chassis according to claim 1, characterized in that, The front and rear adjustment mechanism (10) further includes a first rubber block (170) and a first screw (140); The lower end of the locking member (130) is connected to the first rubber block (170), and the first screw (140) is located on one side of the first rubber block (170). The first screw (140) is screwed to the lower end of the locking member (130). The side wall of the top frame (2) is provided with a side hole (23) that mates with the column of the first screw (140), and the side hole (23) is a vertical strip.

3. The adjustable seat chassis according to claim 2, characterized in that, The front and rear adjustment mechanism (10) also includes a third return spring (150), a third pull wire (160), and a third button (180); One end of the third pull wire (160) is connected to the third button (180), and the other end of the third pull wire (160) is connected to the third bayonet (1701) of the first rubber block (170). The third reset spring (150) can drive the locking member (130) to reset.

4. The adjustable seat chassis according to claim 1, characterized in that, The rear end of the bracket (3) is provided with a fourth shaft (64), the fourth shaft (64) is provided with a torsion spring (9), the first end (91) of the torsion spring (9) is connected to the rear end face (33) of the bracket (3), and the second end (92) of the torsion spring (9) is connected to the third shaft (63) of the movable frame (4).

5. The adjustable seat chassis according to claim 1, characterized in that, The angle adjustment mechanism (7) includes a first button (71), a first pull wire (72), a sliding block (74), and a pin (75); One end of the first pull wire (72) is connected to the first button (71), and the other end of the first pull wire (72) is connected to the slider (74); The sliding block (74) is provided with a sliding groove (742), and the bracket (3) is provided with a guide rail (36) that cooperates with the sliding groove (742); the sliding block (74) is connected to the pin (75); The side wall of the movable frame (4) is provided with a plurality of first stop holes (41) corresponding to the pin (75).

6. The adjustable seat chassis according to claim 5, characterized in that, The bracket (3) is also provided with a guide hole (37) that cooperates with the pin (75). The guide hole (37) extends out of the side wall of the bracket (3), so that the pin (75) can extend out of the side wall of the bracket (3).

7. The adjustable seat chassis according to claim 6, characterized in that, The pin (75) is fitted with a first return spring (76), which is located between the sliding block (74) and the guide hole (37). The other end of the first pull wire (72) is connected to the first bayonet (741) of the sliding block (74), and the other end of the first pull wire (72) is provided with a first buffer spring (73).

8. The adjustable seat chassis according to claim 1, characterized in that, It also includes a height adjustment mechanism (8), which includes a base (81), an arm (82), a second button (83), and a second pull cable (84); The seat (81) is located on one side of the first shaft hole (31) of the bracket (3); One end of the arm (82) is rotatably connected to the base (81); The arm body (82) is provided with a second bayonet (821), and the middle part of the arm body (82) is provided with a pressing block (822); The arm body (82) is located above the first shaft hole (31); One end of the second pull wire (84) is connected to the second button (83), and the other end of the second pull wire (84) is connected to the second bayonet (821); The other end of the second pull wire (84) is provided with a second return spring (85).

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