Seat pan extension unlocking structure

Abstract

The application discloses a seat basin extension unlocking structure, which comprises a seat basin frame body, a seat basin arranged on the seat basin frame body and a sliding body arranged between the seat basin frame body and the seat basin, and is characterized in that the unlocking handle and the pawl arranged between the seat basin and the seat basin frame body are further arranged, the unlocking handle only passes through the pawl to realize multi-gear locking of the seat basin relative to the seat basin frame body in a front-back moving state, and the seat basin is prevented from being separated out in the process of moving forward. The unlocking handle is small in size, is provided with a locking window and a blocking point, is matched with a blocking sheet and a pawl, realizes the functions of locking, unlocking, limiting and blocking, and the special blocking point feature can also realize quick disassembly of the mechanism.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of commercial vehicle seats, in particular to a seat pan limiting sliding block and extension unlocking mechanism. BACKGROUND

[0002] A kind of automobile seat and independent seat cushion extension device disclosed in Chinese utility model publication No.CN212685326U, wherein, three locking pins on unlocking handle cooperate with card slot, first locking pin is inserted into first card slot and third locking pin is inserted into third card slot, the sliding direction of extension plate and fixed plate is limited, second locking pin is inserted into second card slot, the vertical direction of sliding direction of extension plate and fixed plate is limited, control the fixation of entire extension plate in front and back, left and right directions.Unclocking operation is to press down unlocking handle, locking pin is separated from card slot, extension plate moves forward and backward with unlocking handle, three locking pins are inserted into the card slot in current position to complete locking.The unlocking handle of the seat cushion extension unlocking mechanism of the patent is wide, with limiting piece and lock tongue, so an additional plate is needed to make locking window and card mouth, and other features are needed to realize front and back blocking points, and the operating force is downward, which is not conducive to operation.In addition, the sliding block used to connect seat pan and frame is connected and assembled by core-pulling rivet.The sliding block needs to be destructively removed before replacement. SUMMARY

[0003] The first aspect of the present application provides an extension unlocking connection structure, which realizes locking and limiting functions by integrated unlocking handle cooperating with pawl, and can also be quickly disassembled.

[0004] The second aspect of the present application provides a sliding body, which is installed by clamping and can also be adjusted to a certain extent, so that the seat pan moves more smoothly.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present application is:

[0006] A seat pan extension unlocking structure, comprising a seat pan frame body, a seat pan arranged on the seat pan frame body, and a sliding body arranged between the seat pan frame body and the seat pan, further comprising:

[0007] An unlocking handle and a pawl arranged between the seat pan and the seat pan frame body, the unlocking handle realizes multi-gear locking of the seat pan relative to the seat pan frame body in the front and back movement state only through the pawl, to prevent the seat pan from being pulled out during forward movement.

[0008] In a preferred embodiment of the present application,

[0009] One end of the unlocking handle is fixed on the seat pan, and at least one locking slot is arranged on the third segment of the unlocking handle;

[0010] The claw is fixed on the seat frame, and a locking tongue extending upward is arranged on the claw, which is matched with the locking slot to achieve the blocking and locking of the seat during movement.

[0011] In a preferred embodiment of the present application,

[0012] A second section of the unlocking handle is provided with a blocking point.

[0013] The two sides of the claw are respectively provided with a blocking piece.

[0014] The blocking piece limits the unlocking handle during the forward movement of the seat, ensuring that the lateral position of the locking slot does not deviate from the top of the claw.

[0015] When the seat moves to the front end of the stroke, the blocking piece is stuck in the blocking point to prevent the seat from slipping off.

[0016] In a preferred embodiment of the present application, the distance between the blocking pieces is equal to the width of the third section of the unlocking handle and greater than the width of the second section of the unlocking handle.

[0017] In a preferred embodiment of the present application, a notch is arranged on the second section of the unlocking handle, and the width of the second section is smaller than the width of the third section of the unlocking handle. When the seat is located at the front end of the blocking point, the seat continues to move forward by pushing the unlocking handle to rotate, and finally comes out of the seat frame.

[0018] In a preferred embodiment of the present application, an end of the unlocking handle is provided with a limiting column, and a first seat through hole is arranged on the seat, and the rotation angle of the unlocking handle is controlled by the limiting column.

[0019] In a preferred embodiment of the present application, a bending part is arranged on the first section of the unlocking handle, which makes the unlocking handle slightly protrude from the bottom of the seat after being fixed.

[0020] In a preferred embodiment of the present application, a handle is arranged on the other end of the unlocking handle.

[0021] In a preferred embodiment of the present application, at least one sliding body is clamped on the seat frame through a hole shaft structure, and the seat is connected with the seat frame through the sliding body to realize the relative sliding between the seat and the seat frame.

[0022] In a preferred embodiment of the present application, it further comprises:

[0023] A sliding body fixing mechanism arranged on the seat frame;

[0024] After the sliding body is inserted into the sliding body fixing mechanism, it switches between unlocked and locked states by rotating;

[0025] When the sliding body is in the unlocked state, the angle between the axis of the sliding body and the axis of the fixing mechanism is less than 90°;

[0026] When the sliding body is in a locked state, the angle between the axis of the sliding body and the axis of the fixing mechanism is 0°.

[0027] In a preferred embodiment of the present invention,

[0028] The bottom of the sliding body is provided with a fixing pin and at least one buckle, and the buckle is provided on both sides of the fixing pin;

[0029] The sliding body fixing mechanism is composed of a sliding body fixing hole and at least one buckle hole, and the buckle holes are arranged on both sides of the sliding body fixing hole;

[0030] The sliding body fixing hole cooperates with the fixing pin to complete the fixing of the sliding body, and the buckle hole cooperates with the buckle to prevent the sliding body from further rotating after being locked.

[0031] In a preferred embodiment of the present invention, a buckle fixing end is provided at the end of the buckle, and the buckle fixing end is inserted into the buckle hole.

[0032] In a preferred embodiment of the present invention, the fixing pin is further provided with at least a second protruding undercut;

[0033] When the sliding body is in an unlocked state, the second undercut can freely pass through the sliding body fixing hole;

[0034] When the sliding body is in a locked state, the second undercut clamps the sliding body fixing hole.

[0035] In a preferred embodiment of the present invention, a sliding portion is provided on the top of the sliding body, and the basin is connected to the sliding body via a groove on the sliding portion.

[0036] In a preferred embodiment of the present invention, it also includes:

[0037] At least one slide groove is provided on the seat basin, and the slide groove cooperates with the groove to realize sliding of the seat basin relative to the sliding body.

[0038] In a preferred embodiment of the present invention, the slide groove consists of a sliding groove and a disengagement end provided at one end of the sliding groove;

[0039] The sliding groove and the groove inlay assembly are assembled into a pin-slot structure;

[0040] The size of the extrication end is slightly larger than the size of the sliding part, so that the seat basin is assembled with the sliding body through the extrication end.

[0041] The present application has the advantages of:

[0042] The seat basin extension unlocking structure provided by the present application has a small unlocking handle, and has a locking window and a blocking point, a pawl, a locking tongue and a catch cooperating with each other to realize the functions of locking, unlocking, limiting and blocking. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced.

[0044] Figure 1 is a structure diagram of the unlocking handle of the present application.

[0045] Figure 2 is a structure diagram of the seat basin of the present application and a partial enlarged view of the seat basin through hole and the sliding groove.

[0046] Figure 3 is an assembly schematic diagram of the unlocking handle and the seat basin of the present application Figure 1 .

[0047] Figure 4 is an assembly schematic diagram of the unlocking handle and the seat basin of the present application Figure 2 .

[0048] Figure 5 is a structure diagram of the catch of the present application.

[0049] Figure 6 is an assembly diagram of the seat basin frame, the sliding body and the catch of the present application.

[0050] Figure 7 is an assembly schematic diagram of the seat basin frame and the seat basin of the present application.

[0051] Figure 8 is a schematic diagram of the seat basin located at the front end of the seat basin frame of the present application.

[0052] Figure 9 is an unlocking schematic diagram of the seat basin located at the front end of the seat basin frame of the present application.

[0053] Figure 10 is a schematic diagram of the seat basin located at the rear end of the seat basin frame of the present application.

[0054] Figure 11 is a perspective view of the Figure 8 of the present application.

[0055] Figure 12 is a perspective view of theFigure 10 Stereoscopic image.

[0056] Figure 13 This is a schematic diagram of the working of the unlocking handle of the present invention. Figure 1 .

[0057] Figure 14 This is a schematic diagram of the working of the unlocking handle of the present invention. Figure 2 .

[0058] Figure 15 This is a schematic diagram of the working of the unlocking handle of the present invention. Figure 3 .

[0059] Figure 16 The present invention Figure 15 Enlarged view of the baffle.

[0060] Figure 17 It is a schematic diagram of the locking of the blocking point and the blocking piece of the present invention.

[0061] Figure 18 This is a schematic diagram of the present invention that the unlocking handle is rotated to release the blocking piece. Figure 1 .

[0062] Figure 19 This is a schematic diagram of the present invention that the unlocking handle is rotated to release the blocking piece. Figure 2 .

[0063] Figure 20 It is a schematic diagram of the sliding body assembly structure of the prior art of the present invention.

[0064] Figure 21 It is a schematic structural diagram of the sliding body of the present invention.

[0065] Figure 22 It is a bottom view of the sliding body of the present invention.

[0066] Figure 23 Schematic diagram of the sliding body and the sliding body fixing mechanism of the present invention Figure 1 .

[0067] Figure 24 Schematic diagram of the sliding body and the sliding body fixing mechanism of the present invention Figure 2 .

[0068] Figure 25 It is a schematic diagram of the sliding body of the present invention after assembly and a partial enlarged diagram of its snap-fit ​​fixing end.

[0069] Figure 26 It is a schematic diagram of the axis of the sliding body fixing mechanism and the axis of the sliding body under the conventional design of the present invention.

[0070] Figure 27is a schematic view of the axis of the sliding body fixing mechanism and the axis of the sliding body of the present application.

[0071] Figure 28 is a schematic view of the assembly process of the sliding body and the seat pan frame body of the present application.

[0072] Figure 29 is a sectional view of the sliding body after assembly of the present application. DETAILED DESCRIPTION

[0073] In the description of the present application, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0074] The detailed structure of the present application is further described below in combination with the drawings and specific embodiments.

[0075] The seat pan extension unlocking structure of the present application mainly comprises a seat pan frame body 500, a seat pan 300, an unlocking handle 100, a clamping jaw 200 and a sliding body 400.

[0076] Reference Figure 1 One end of the unlocking handle 100 is fixed on the seat pan through a fastener passing through the handle via hole 113. The other end of the unlocking handle 100 is provided with a knob 132 for facilitating the passenger to control the unlocking handle 100. The unlocking handle 100 is divided into an unlocking handle first section 110, an unlocking handle second section 120 and an unlocking handle third section 130 from its fixed end to the front. A plurality of locking grooves 131 are provided on the unlocking handle third section 130 for cooperating with the clamping jaw 200 to form a plurality of sliding locking stop positions of the seat pan 300. The side of the unlocking handle second section 120 is provided with a stop point 122 and a slot 121. The width of the unlocking handle third section 130 is W1, and the width of the unlocking handle second section 120 is W2. A bending portion 111 is provided on the unlocking handle first section 110, which makes the unlocking handle first section 110 have a downward bending trend to the unlocking handle third section 130, avoiding interference with the foam 330( Figure 13 ) when the unlocking handle 100 extends straight forward from the bottom of the seat pan 300.

[0077] In combination Figures 2 to 4, the first seat basin via hole 311 and the second seat basin via hole 312 are arranged on the seat basin 300. The front side of the handle via hole 113 is also provided with a limiting column 112. The fastener is fixed through the handle via hole 113 and then through the second seat basin via hole 312. The limiting column 112 is placed in the first seat basin via hole 311, and the movement range of the limiting column 112 is limited through the first seat basin via hole 311, so as to control the rotation angle of the unlocking handle 100. There are also observation windows 301 and sliding grooves 320, and the structure here is described later.

[0078] Reference Figure 5 , the pawl 200 is fixed on the seat basin frame 500. The two sides of the pawl 200 are respectively provided with a baffle 201, and the front side is provided with a locking tongue 202 extending upward, which cooperates with the locking groove 131 to achieve the blocking and locking of the seat basin 300 during movement. The distance between the two baffles 201 is W3.

[0079] Reference Figures 6 to 10 When the seat basin 300 is assembled to the seat basin frame 500, the unlocking handle 100 passes through the middle of the two baffles 201 of the pawl 200, and the locking tongue 202 is inserted into the locking groove 131 to achieve locking. When unlocking, after lifting the handle 132 upward to make the locking groove 131 disengage from the locking tongue 202, the seat basin 300 is pushed to move.

[0080] Reference Figures 11 to 19 When the seat basin 300 is located at the last end position, the handle 132 is lifted to unlock. The lifting space of the handle 132 is limited by the foam 330 installed on the seat basin 300, so the handle 132 will not jump out of the baffles 201 due to excessive lifting. During the continuous movement of the seat basin 300, the baffles 201 limit the movement direction of the unlocking handle 100, W3=W1, and the first section 110 of the unlocking handle always moves linearly between the baffles 201, so the unlocking handle 100 can be lowered at any time, and the locking groove 131 can accurately fall into the locking tongue 202 to complete the locking (without lateral misplacement). When the seat basin 300 moves to the most front end position, the second end 120 of the unlocking handle moves between the baffles 201, and the stop point 122 is blocked by the baffles 201. At this time, the last locking groove 131 falls into the locking tongue 202 when the unlocking handle 100 is lowered.

[0081] If the seat basin 300 is to be disassembled, the unlocking handle 100 is rotated clockwise according to the arrow direction ( Figure 17 ), so that the notch 121 enters the front side of the baffle 201, and the stop point 122 on the other side is separated from the baffle 201, W2 Figure 18 and Figure 19 ) is less than W3, so that the pawl 200 is released from the locking of the unlocking handle 100, and the seat basin 300 can continue to move forward (

[0082] ReferenceFigure 21 and Figure 22 On the seat frame 500, four sliding bodies 400 are also arranged, the seat 300 is connected with the seat frame 500 through the sliding bodies 400, and relative sliding between the seat 300 and the seat frame 500 is realized (combined with Figure 6 ). The sliding bodies 400 can be made of plastic or rubber.

[0083] The bottom of the sliding body 400 is provided with a fixing pin 430, and the two sides of the fixing pin 430 are respectively arranged with buckles 432. The end of the buckle 432 is provided with a buckle fixing end 433, and the fixing pin 430 is also provided with a second reverse buckle 431 extending outward. The top of the sliding body 400 is provided with a sliding part 410, and the side of the sliding part 410 is provided with a second reverse buckle 411 extending outward, and a groove 412 is arranged between the second reverse buckle 411 and the supporting part 420.

[0084] Referring to Figures 23 to 27 , the seat frame 500 is arranged with a sliding body fixing mechanism composed of a sliding body fixing hole 501 and a buckle hole 502, and the buckle hole 502 is arranged on the two sides of the sliding body fixing hole 501. The sliding body fixing hole 501 is a keyhole-shaped profile of the fixing pin 430, so that the fixing pin 430 can pass through it. The hole diameter of the sliding body fixing hole 501 is slightly larger than the size of the buckle fixing end 433.

[0085] In the conventional state, when the sliding body 400 is in the unlocked disassembly state, the sliding body fixing mechanism axis 503 (passing through the sliding body fixing hole 501) is perpendicular to the sliding body axis 401 (passing through the buckle 432). But this design, will cause the buckle 430 to interfere with the metal mounting surface during installation (such as Figure 26 ).

[0086] Therefore, by setting the sliding body fixing hole 501 obliquely, so that when the unlocking disassembly state, the included angle between the sliding body fixing mechanism axis 503 and the sliding body axis 401 is less than 90°, to avoid the interference between the sliding body 400 and the mounting surface (such as Figure 27 ).

[0087] Referring to Figure 28 and Figure 29 , when the fixing pin 430 is inserted into the sliding body fixing hole 501, the second reverse buckle 431 and the supporting part 420 are rotated to jointly clamp the metal mounting surface, and when the buckle fixing end 433 falls into the sliding body fixing hole 501, the sliding body is completely fixed on the seat frame 500. At this time, the sliding body 400 is in the locked state, and the included angle between the sliding body axis 401 and the fixing mechanism axis 503 is 0°. By adjusting the hole diameter of the sliding body fixing hole 501, the sliding body 400 can still have a certain degree of rotational freedom after being fixed, so that the seat 300 can be more easily installed.

[0088] In conjunction with reference to Figure 2 , 6 and 7, the seat basin 300 is provided with four sliding grooves 320, each of which is composed of a sliding groove 322 and an escape end 321 provided at one end of the sliding groove 322. The escape end 321 is slightly larger in size than the sliding part 410. After the sliding body 400 is passed from below the escape end 321, the groove 412 is engaged with the sliding groove 322 by pushing the seat basin 300, so that the seat basin 300 is moved relative to the sliding body 400.

Claims

1. A seat bowl extension unlocking structure, comprising a seat bowl frame, a seat bowl arranged on the seat bowl frame, and a sliding body arranged between the seat bowl frame and the seat bowl, characterized in that: Also includes: An unlocking handle and a claw are provided between the seat basin and the seat basin frame, wherein the unlocking handle realizes multi-stage locking of the seat basin in a forward and backward movement state relative to the seat basin frame only through the claw, thereby preventing the seat basin from falling out during the forward movement; At least one sliding body is clamped on the seat basin frame, and the seat basin is connected to the seat basin frame via the sliding body to achieve relative sliding between the seat basin and the seat basin frame, and the sliding body switches between unlocked and locked states by rotating; The unlocking handle has a first section, a second section, and a third section, wherein the width of the second section is smaller than the width of the third section. When the seat basin is located at the frontmost stop point, the unlocking handle is pushed and rotated to cause the seat basin to continue to move forward and eventually escape from the seat basin frame. a sliding body fixing mechanism provided on the basin frame, wherein the sliding body is inserted into the sliding body fixing mechanism; The bottom of the sliding body is provided with a fixing pin and at least one buckle, and the buckle is provided on both sides of the fixing pin; the sliding body fixing mechanism is composed of a sliding body fixing hole and at least one buckle hole, and the buckle holes are provided on both sides of the sliding body fixing hole; the sliding body fixing hole cooperates with the fixing pin to complete the fixing of the sliding body, and the buckle hole cooperates with the buckle to prevent the sliding body from further rotation after being locked; The end of the buckle is provided with a buckle fixing end, and the buckle fixing end is inserted into the buckle hole; the fixing pin is also provided with at least a second protruding buckle; when the sliding body is in an unlocked state, the second undercut can freely pass through the sliding body fixing hole; when the sliding body is in a locked state, the second undercut clamps the sliding body fixing hole.

2. The seat extension unlocking structure according to claim 1, characterized in that: One end of the unlocking handle is fixed to the basin, and at least one locking groove is provided on the third section; The clamping claw is fixed on the seat basin frame, and a locking tongue extending upward is provided on the clamping claw. The locking tongue cooperates with the locking groove to realize the gear locking of the seat basin during the movement.

3. The seat extension unlocking structure according to claim 2, characterized in that: A stop point is provided on the side of the second section; Blocking pieces are respectively provided on both sides of the clamping claw; The blocking piece restricts the unlocking handle during the forward movement of the seat basin, ensuring that the lateral position of the lock slot does not deviate from being directly above the claw; When the seat basin moves to the front end of its travel, the blocking piece is locked to the blocking point to prevent the seat basin from slipping.

4. The seat extension unlocking structure according to claim 3, characterized in that: The spacing between the blocking pieces is equal to the width of the third section of the unlocking handle and is greater than the width of the second section of the unlocking handle.

5. The seat extension unlocking structure according to claim 4, characterized in that: The second section of the unlocking handle is provided with a notch, and the notch makes the width of the second section smaller than the width of the third section of the unlocking handle.

6. The seat extension unlocking structure according to claim 5, characterized in that: A limiting column is provided at the end of the unlocking handle, and a first seat basin through hole is provided on the seat basin. The first seat basin through hole is pre-positioned during assembly through the limiting column.

7. The seat extension unlocking structure according to claim 2, characterized in that: A bending portion is provided on the first section of the unlocking handle, and the bending portion enables the unlocking handle to slightly protrude from the bottom of the basin after being fixed.

8. The seat bowl extension unlocking structure according to claim 2, characterized in that: The other end of the unlocking handle is provided with a handle.

9. The seat bowl extension unlocking structure according to any one of claims 1 to 8, characterized in that: The sliding body is clamped on the basin frame through a hole-shaft structure When the sliding body is in the unlocked state, the angle between the axis of the sliding body and the axis of the fixing mechanism is less than 90°; When the sliding body is in a locked state, the angle between the axis of the sliding body and the axis of the fixing mechanism is 0°.

10. The seat bowl extension unlocking structure according to claim 9, characterized in that: A sliding portion is provided on the top of the sliding body, and the basin is connected to the sliding body through a groove on the sliding portion.

11. The seat bowl extension unlocking structure according to claim 10, characterized in that: Also includes: At least one sliding groove is provided on the seat basin, and the sliding groove cooperates with the groove on the sliding portion to realize the sliding of the seat basin relative to the sliding body.

12. The seat bowl extension unlocking structure according to claim 11, characterized in that: The slide groove is composed of a sliding groove and a disengagement end arranged at one end of the sliding groove; The sliding groove is inlaid with the groove on the sliding part to form a pin-slot structure; The size of the escape end is slightly larger than that of the sliding portion, so that the seat basin is assembled with the sliding body through the escape end.

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