Seat and cushion lifting mechanism thereof

Abstract

The utility model discloses a seat and a seat cushion lifting mechanism thereof, the left end and the right end of a seat cushion are respectively provided with a telescopic supporting leg, and each supporting leg comprises a first sleeve, a second sleeve and a locking mechanism; the second sleeve is inserted into the first sleeve and is in sliding fit with the first sleeve, and the top of the second sleeve extends out of the second sleeve and then is connected with the cushion; a plurality of first lock holes which are formed up and down are formed in the first sleeve; the locking mechanism comprises a spring bolt and a driving block, the spring bolt is installed on the second sleeve in a sliding mode, the spring bolt is connected with the first lock hole in a pluggable mode, and the spring bolt can slide in the extending direction of the first lock hole; the driving block is slidably mounted on the second sleeve, and the driving block can drive the lock tongue to be pulled out of the first lock hole when moving; the locking mechanism further comprises a reset piece, and the reset piece can be used for driving the spring bolt and the driving block to reset. By means of the arrangement, the number of components needed by the locking mechanism is smaller, the spring bolt slides in the extending direction of the first lock hole, and then misoperation can be effectively avoided.

Description

Technical Field

[0001] The utility model relates to the field of home furnishings, in particular to a seat and a seat cushion lifting mechanism thereof. Background Art

[0002] A chair generally includes a seat cushion and a support for the seat cushion. By adjusting the seat cushion's height, users with limited height or arm length can be accommodated. Currently, some chairs with multiple functions are available on the market. However, these chairs are complex in structure and difficult to operate, resulting in significant inconveniences and drawbacks in their construction and use.

[0003] The prior art with announcement number CN201303752Y discloses a high chair, comprising a seat, a leg for supporting the seat, and an adjustment unit arranged on the leg for adjusting the seat height, the leg having a first leg connected to the seat, and a second leg connected below the first leg, characterized in that the adjustment unit comprises a locking tongue pivotally arranged in the first leg, a movable block slidably arranged in the first leg and capable of rotating the locking tongue to timely interfere with the first and second leg, an elastic member connected between the first leg and the movable block and capable of driving the movable block to reset, a button provided on the first leg and adjacent to the seat, and a traction rope connected between the button and the movable block, wherein by pressing the button, the traction rope can be linked to drive the movable block to slide, and the locking tongue can be synchronously linked to rotate to release the interference with the first and second leg, and the adjustment unit is in a released state, and the first leg can be lifted and displaced relative to the second leg to achieve the effect of facilitating height adjustment.

[0004] In the prior art, the structure of the adjustment unit for adjusting the seat height and the connection method of each component are relatively complicated, which not only reduces the stability of the chair, but also makes the assembly of the chair more complicated and troublesome; an inclined surface is provided between the lock tongue and the hole of the second leg in the prior art. Summary of the Invention

[0005] In order to solve the problems in the prior art of complex mechanisms for controlling seat cushion height and difficult assembly, the purpose of the present invention is to provide a seat and a seat cushion lifting mechanism thereof, with fewer locking tongue components and the mutual cooperation between the various components facilitating the manufacture and assembly of the seat.

[0006] To achieve the above-mentioned object, the present invention adopts the following technical solution: a seat cushion lifting mechanism, wherein a retractable support leg is respectively installed at the left and right ends of the seat cushion, and the support leg includes a first sleeve, a second sleeve, and a locking mechanism; the second sleeve is inserted into the first sleeve and slidably fits therein, and the top of the second sleeve extends from the second sleeve and is connected to the seat cushion; the first sleeve is provided with a plurality of first locking holes arranged vertically;

[0007] The locking mechanism includes a lock tongue and a drive block. The lock tongue is slidably mounted on the second sleeve and is pluggably connected to the first lock hole. The lock tongue can slide along the extension direction of the first lock hole. The drive block is slidably mounted on the second sleeve. When the drive block moves, it can drive the lock tongue to be pulled out of the first lock hole.

[0008] The locking mechanism further comprises a reset member, which can be driven to reset the lock tongue and the drive block.

[0009] Preferably, a first limiting column and a second limiting column are provided on the second sleeve, the first limiting column and the second limiting column are arranged up and down, the lock tongue is located between the first limiting column and the second limiting column, and the first limiting column and the second limiting column are both slidably matched with the lock tongue; one end of the lock tongue extends from the first limiting column and the second limiting column, and then is plugged and unplugged into the first lock hole of the first sleeve.

[0010] Preferably, a second through hole is provided on the driving block, the first limiting post, the second limiting post and the lock tongue are inserted into the second through hole, and the first limiting post and the second limiting post are both slidably engaged with the driving block.

[0011] Preferably, the driving block is provided with a slope, and when the driving block moves, the locking tongue can be driven to be pulled out of the first lock hole through the slope; specifically, a notch is provided on the driving block, and when the driving block moves, the locking tongue can be driven to be pulled out of the first lock hole through the slope; the notch is connected to the second through hole, and one inner wall of the notch is a slope, and part of the locking tongue is located in the notch of the driving block and can be against the slope of the notch.

[0012] Preferably, a movable button is installed on the second sleeve, one end of the connecting member is connected to the button, and the other end of the connecting member is connected to the driving block; when the button is active, the driving block can be driven to move through the connecting member, and then the driving block drives the lock tongue to disengage from the first lock hole of the first sleeve.

[0013] Preferably, the connecting member comprises a steel wire rope.

[0014] Preferably, the end portion of the lock tongue that is plugged into the first lock hole is rectangular.

[0015] Preferably, the reset member includes a spring, a third limiting column is protruded from the second sleeve, one end of the spring is sleeved on the third limiting column and abuts against the second sleeve, and the other end of the spring abuts against the lock tongue.

[0016] Preferably, the locking assembly also includes a lock body, which is fixed on the second sleeve, and a second opening is provided on the lock body, in which the lock tongue, the drive block and the reset member are all arranged in the second opening of the lock body; a second lock hole connected to the accommodating space is provided on the lock body, and one end of the lock tongue extends from the second lock hole and is plugged and unplugged into the first lock hole.

[0017] A seat comprises the above-mentioned seat cushion lifting mechanism.

[0018] The beneficial effects of the technical solution of the present invention are as follows: the locking mechanism is only installed on the second sleeve and moves simultaneously with the second sleeve, which makes the process and effect of the locking action more stable; the locking mechanism is hidden in the second sleeve, which makes the appearance of the supporting leg more concise and beautiful; the locking mechanism requires fewer components, and the driving block and the locking tongue cooperate with each other, which makes the structure of the supporting leg simpler, the locking effect more stable and reliable, and the assembly process simpler; and the locking tongue can only slide in the extension direction of the first lock hole, thereby effectively avoiding misoperation and ensuring the stability of the support leg connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of the seat;

[0020] Figure 2 Schematic diagram of the supporting leg structure Figure 1 ;

[0021] Figure 3 Schematic diagram of the supporting leg structure Figure 2 ;

[0022] Figure 4 Schematic diagram of the structure of the second casing;

[0023] Figure 5 It is a structural diagram of the locking mechanism;

[0024] Figure 6 It is a structural diagram of the unlocking structure;

[0025] Figure 7 is a schematic structural diagram of the shell;

[0026] Figure 8 Schematic diagram of the structure of the button;

[0027] Figure 9 It is a structural diagram of the locking mechanism;

[0028] Figure 10 Schematic diagram of the lock body structure Figure 1 ;

[0029] Figure 11 Schematic diagram of the lock body structure Figure 2 ;

[0030] Figure 12 It is a structural diagram of the lock tongue;

[0031] Figure 13 This is a schematic diagram of the structure of the driver block.

[0032] Reference numerals: 1, supporting foot; 2, first sleeve; 21, limiting pin; 22, first locking hole; 23, first sliding sleeve;

[0033] 3. Second sleeve; 32. Third limiting hole; 33. Second locking hole;

[0034] 4. Connecting rod; 5. Seat cushion;

[0035] 6. Locking mechanism; 61. Housing; 611. First opening; 612. First avoidance hole; 613. Limiting cavity; 62. Button; 621. Pressing portion; 622. Linking portion; 623. Hinge portion; 63. Connecting member; 64. Lock body; 641. Second opening; 642. Third lock hole; 643. First limiting post; 644. Second limiting post; 645. Third limiting post; 646. First bayonet; 647. Second avoidance hole; 65. Friction plate; 66. Drive block; 661. Second through hole; 662. Notch; 6621. First limiting surface; 6622. Second limiting surface; 6623. Third limiting surface; 6624. Fourth limiting surface; 663. First adjusting portion; 664, second positioning opening; 665, second limiting opening; 67, locking tongue; 671, locking portion; 672, fifth limiting surface; 673, sixth limiting surface; 674, seventh limiting surface; 675, eighth limiting surface. DETAILED DESCRIPTION

[0036] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more, unless expressly limited otherwise.

[0039] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0040] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature. Example

[0041] like Figures 1 to 13 The seat cushion lifting mechanism shown has a retractable support leg mounted on each end of the seat cushion. The support leg comprises a first sleeve 2, a second sleeve 3, and a locking mechanism 6. The second sleeve 3 is inserted into the first sleeve 2 and slides into place. The top of the second sleeve 3 extends from the first sleeve 2 and is connected to the seat cushion 5. The first sleeve 2 is provided with a plurality of first locking holes 22 arranged vertically, and the second sleeve 3 is provided with a second locking hole 33.

[0042] The locking mechanism 6 is installed in the second sleeve 3, and the locking mechanism 6 includes a button 62, a connecting piece 63, a driving block 66, a locking tongue 67 and a reset piece for driving the locking tongue 67 to reset; the button 62 is movably installed on the second sleeve 3, and the driving block 66 and the locking tongue 67 are both slidably installed in the sleeve, and the button 62 is connected to the driving block 66 through the connecting piece 63, and the driving block 66 is connected to the locking tongue 67 and slides together; wherein, one end of the driving block 66 is provided with a notch 662, and the other end of the driving block 66 is provided with a second through hole 661 connected to the notch 662, and the inner wall of the notch 662 includes at least one inclined surface, one end of the locking tongue 67 is located in the notch 662 of the lock hole, and the other end of the locking tongue 67 passes through the second through hole 661 and the second lock hole 33 and is plugged and unplugged into the first lock hole 22;

[0043] When the button 62 is driven, the button 62 can drive the driving block 66 to move in the length direction of the second sleeve 3 through the connecting piece 63. When the driving block 66 moves, it can push the lock tongue 67 through the inclined surface to disengage the lock tongue 67 from the first lock hole 22.

[0044] With this arrangement, the locking mechanism 6 is only installed on the second sleeve 3 and moves simultaneously with the second sleeve 3, which makes the process and effect of the locking action more stable; the locking mechanism 6 is hidden in the second sleeve 3, making the appearance of the support leg more simple and beautiful; the locking mechanism 6 requires fewer components, and the driving block 66 and the locking tongue 67 cooperate with each other, making the structure of the support leg simpler and the locking effect more stable and reliable.

[0045] In this embodiment, Figure 2 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8 As shown, the button 62 is hinged on the second sleeve 3, with one end of the button 62 located outside the second sleeve 3, and the other end of the button 62 extending into the second sleeve 3 and connected to the connector 63. Specifically, the locking mechanism 6 includes a housing 61 fixed to the upper portion of the second sleeve, one end of the housing 61 is provided with a first opening 611, and the other end of the housing 61 is provided with a first avoidance hole 612 communicating with the first opening 611. The first opening 611 includes a first accommodating cavity and a limiting cavity 613 that are interconnected, and the two limiting cavities 613 are respectively provided on both sides of the first accommodating cavity; the button 62 includes a pressing portion 621 and a linkage portion 622, and hinge portions 623 protrude on both sides of the linkage portion 622; the two hinge portions 623 of the button 62 are respectively installed in the two limiting cavities 613 of the housing, the pressing portion 621 of the button 62 protrudes from the first avoidance hole 612 of the housing 61, and the linkage portion 622 of the button 62 protrudes from the first accommodating cavity of the housing 61 and then extends into the second sleeve 3. Such an arrangement facilitates the assembly of the locking mechanism 6 on the sleeve.

[0046] In this embodiment, Figure 5 and Figure 9As shown, the locking mechanism 6 also includes a lock body 64, which is disposed within the second sleeve. The lock body 64 is provided with a second opening 641 and a third locking hole 642, the second opening 641 being connected to the third locking hole 642. A first limiting post 643 and a second limiting post 644 are protruded from the lock body 64, and the first limiting post 643 and the second limiting post 644 are respectively disposed on the upper and lower sides of the third locking hole 642. The driving block 66 and the lock tongue 67 are both disposed within the second opening. The first limiting post 643 and the second limiting post 644 are inserted into the second through hole 661 of the driving block 66, and the first limiting post 643 and the second limiting post 644 both slidably engage with the driving block 66. The first limiting post 643 and the second limiting post 644 clamp the lock tongue 67 and slidably engage with it. This arrangement allows the lock body 64, the driving block 66, and the lock tongue 67 to be pre-assembled and then uniformly installed on the second sleeve 3, thereby facilitating assembly.

[0047] In order to facilitate the restriction of the movement of the driving block 66 and the locking tongue 67, in this embodiment, as shown in FIG. Figure 12 and Figure 13 As shown, the notch 662 of the driving block 66 includes a first limiting surface 6621, a second limiting surface 6622, a third limiting surface 6623 and a fourth limiting surface 6624 connected in sequence from top to bottom; wherein, the first limiting surface 6621 and the second limiting surface 6622 are vertically arranged, the first limiting surface 6621 and the fourth limiting surface 6624 are parallelly arranged, and the third limiting surface 6623 and the fourth limiting surface 6624 are inclined; the lock tongue 67 includes a fifth limiting surface 672, a second limiting surface 672, a third limiting surface 673 and a fourth limiting surface 6624 connected in sequence. The sixth limiting surface 673, the seventh limiting surface 674, and the eighth limiting surface 675 are arranged; the fifth limiting surface 672 and the sixth limiting surface 673 are arranged perpendicularly, the fifth limiting surface 672 and the eighth limiting surface 675 are arranged parallel, and the seventh limiting surface 674 and the eighth limiting surface 675 are arranged at an angle. The third limiting surface 6623 of the notch 662 on the driving block 66 and the seventh limiting surface 674 of the locking tongue 67 are in contact with each other, and the length of the third limiting surface 6623 is greater than the length of the seventh limiting surface 674. In this arrangement, the driving block 66 and the locking tongue 67 are each constrained by their structure to limit the movement of each other, making the locking structure simpler and more reliable.

[0048] In order to facilitate the restriction of the movement of the lock tongue 67, in this embodiment, as shown in FIG. Figure 9 、 Figure 12 and Figure 13 As shown, the lock tongue 6 has a protruding locking portion 671, which protrudes from the sixth limiting surface 673 and the seventh limiting surface 674. The height of the second through hole 661 in the driving block 66 is greater than the height of the notch 662, and the locking portion 671 of the lock tongue 67 fits into the second through hole 661 of the driving block 66. This arrangement can make the movement of the lock tongue 67 more stable.

[0049] In this embodiment, Figure 3 and Figure 5 As shown, the connecting member 63 includes a steel wire rope, the ends of which are respectively mounted on the driving block 66 and the button 62; specifically, a first positioning post and a second positioning post are respectively fixed to the ends of the steel wire, and the first positioning post and the second positioning post are respectively mounted on the connecting portion of the button 62 and the driving block 66; wherein, a first positioning opening 625 and a first limiting opening 624 are formed on the linkage portion 622 of the button 62, and the first limiting opening 624 is located above the first positioning opening 625, and the first limiting opening 624 and the first positioning opening 625 are connected; After the first positioning post on the wire rope is inserted into the first positioning opening 625, the wire rope extends from the first limiting opening 624. The lock body 64 is provided with a second avoidance hole 647 connected to the second opening 641. The drive block 66 is provided with a second positioning opening 664 and a second limiting opening 665. The second limiting opening 665 is located above the second positioning opening 664 and is connected to the second positioning opening 664. After the second positioning post on the wire rope is inserted into the second positioning opening 664, the wire rope extends from the second limiting opening 665. A first adjustment portion 663 is raised on the lock body 64, and the second limiting opening 665 passes through the first adjustment portion. This arrangement allows the button 62 and the drive block 66 to be flexibly connected via the wire rope, thereby effectively reducing the structure of the support leg and the difficulty of installing and assembling the support leg.

[0050] In this embodiment, Figure 3 、 Figure 5 、 Figure 9 and Figure 10 As shown, the reset member includes a spring disposed between the lock tongue 67 and the lock body 64. A third limiting post 645 protrudes from the second opening 641 of the lock body 64. One end of the spring is sleeved within the third limiting post 645, while the other end of the spring abuts against the lock tongue 67. This arrangement not only allows the locking pin to automatically reset, but also limits its movement.

[0051] In this embodiment, Figure 1 、 Figure 2 and Figure 3 As shown, the second sleeve 3 is provided with a third limiting hole 32, and the first sleeve 2 is fixed with a limiting pin 21. One end of the limiting pin 21 is inserted into the third limiting hole 32 and slides into the limiting hole 32. This arrangement can limit the movement of the support leg and correct the movement direction of the second and first sleeves.

[0052] In this embodiment, Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, the top of the first sleeve 2 is sleeved with a first sliding sleeve 23, and the second sleeve 3 passes through the first sliding sleeve 23 and slides in engagement therewith. The front and rear ends of the lock body 64 are respectively provided with first bayonet holes 646, and the bottom of the second sleeve 3 is provided with a second bayonet hole. A friction plate 65 is provided with a latching protrusion. The lock body 64 is disposed within the second sliding sleeve, and two friction plates 65 are disposed on the front and rear sides of the second sleeve, respectively. The latching protrusions on the friction plates 65 pass through the second bayonet hole and engage with the first bayonet holes 646 on the lock body 64, and the friction plates 65 slide in engagement with the first sleeve 2. This arrangement makes the fit between the first sleeve 2 and the second sleeve 3 more compact and also simplifies the structure of the support leg.

[0053] In this embodiment, Figure 1 As shown, the two sleeves are fixedly connected by a connecting rod 4, and the seat cushion 5 is fixed on the connecting rod 4. This arrangement allows the two supporting legs to only move synchronously, thereby preventing the risk of misoperation.

[0054] In this embodiment, the end of the locking tongue 67 that plugs into the first locking hole 22 is rectangular. This arrangement can prevent the seat from being lifted due to accidental operation when moving the chair. When using the above-mentioned seat cushion 5 lifting structure to adjust the height of the seat cushion 5, the user presses the buttons 62 on the two support feet with both hands. The button 62 rotates and pulls the wire rope, which pulls the drive block 66 upward. The drive block 66 pushes the seventh limiting surface 674 of the locking tongue 67 through the third limiting surface 6623, causing the locking tongue 67 to move into the second sleeve. The locking portion 671 of the locking tongue 67 disengages from the first locking hole 22 of the first sleeve, and the locking tongue 67 compresses the spring, unlocking the first and second sleeves. The relative position of the second sleeve and the first sleeve is then adjusted. After the adjustment is in place, the user releases the button 62, and the spring pushes the locking tongue 67 into the first locking hole 22 of the first sleeve. During the movement of the locking tongue 67, the driving block 66 is pushed back to its original position, thereby completing the height adjustment of the seat cushion 5. The end of the locking portion 671 that is inserted into the first locking hole is rectangular.

[0055] A seat, such as Figure 1 As shown, it includes the above-mentioned seat cushion 5 lifting structure, as well as a chair back, a supporting leg 1 and a footrest. The two supporting legs 1 are respectively fixed to the bottom of the two first sleeves 2, and the two first sleeves 2 are fixed together through the footrest. The two ends of the chair back are respectively fixedly connected to the two second sleeves 3.

[0056] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0057] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A seat cushion lifting mechanism, characterized in that: A retractable support leg is installed at each of the left and right ends of the seat cushion (5), and the support leg comprises a first sleeve (2), a second sleeve (3) and a locking mechanism (6); the second sleeve (3) is inserted into the first sleeve (2) and slidably fits therein, and the top of the second sleeve (3) extends from the second sleeve (3) and is connected to the seat cushion (5); a plurality of first locking holes (22) arranged vertically are provided on the first sleeve (2); The locking mechanism (6) includes a locking tongue (67) and a driving block (66), wherein the locking tongue (67) is slidably mounted on the second sleeve (3), the locking tongue (67) is pluggably connected to the first lock hole (22), and the locking tongue (67) can slide along the extension direction of the first lock hole (22); the driving block (66) is slidably mounted on the second sleeve (3), and when the driving block (66) moves, it can drive the locking tongue (67) to be pulled out of the first lock hole (22); The locking mechanism (6) further comprises a reset member, which can be driven to reset the locking tongue (67) and the driving block (66).

2. A seat cushion lifting mechanism according to claim 1, characterized in that: A first limiting column (643) and a second limiting column (644) are provided on the second sleeve (3), the first limiting column (643) and the second limiting column (644) are arranged up and down, the locking tongue (67) is located between the first limiting column (643) and the second limiting column (644), and the first limiting column (643) and the second limiting column (644) are both slidably matched with the locking tongue (67); one end of the locking tongue (67) extends from the first limiting column (643) and the second limiting column (644), and then is plugged and connected to the first locking hole (22) of the first sleeve (2).

3. The seat cushion lifting mechanism according to claim 2, characterized in that: A second through hole (661) is provided on the driving block (66), and the first limiting column (643), the second limiting column (644) and the locking tongue (67) are inserted into the second through hole (661), and the first limiting column (643) and the second limiting column (644) are both slidably matched with the driving block (66).

4. The seat cushion lifting mechanism according to claim 1, characterized in that: The driving block (66) is provided with an inclined surface, and when the driving block (66) moves, the locking tongue (67) can be driven to be pulled out of the first lock hole (22) through the inclined surface; specifically, a notch (662) is provided on the driving block (66), and when the driving block (66) moves, the locking tongue (67) can be driven to be pulled out of the first lock hole (22) through the inclined surface; the notch (662) is connected to the second through hole (661), and an inner wall of the notch (662) is an inclined surface, and a portion of the locking tongue (67) is located in the notch (662) of the driving block (66) and can be abutted against the inclined surface of the notch (662).

5. The seat cushion lifting mechanism according to claim 1, characterized in that: A movable button (62) is installed on the second sleeve (3), one end of the connecting member (63) is connected to the button (62), and the other end of the connecting member (63) is connected to the driving block (66); when the button (62) is movable, it can drive the driving block (66) to move through the connecting member (63), thereby causing the driving block (66) to drive the lock tongue (67) to disengage from the first lock hole (22) of the first sleeve.

6. The seat cushion lifting mechanism according to claim 5, characterized in that: The connecting member (63) comprises a steel wire rope.

7. The seat cushion lifting mechanism according to claim 1, characterized in that: The end portion of the lock tongue (67) that is plugged into the first lock hole (22) is rectangular.

8. The seat cushion lifting mechanism according to claim 1, characterized in that: The reset member includes a spring, a third limiting column (645) protrudes from the second sleeve (3), one end of the spring is sleeved on the third limiting column (645) and abuts against the second sleeve (3), and the other end of the spring abuts against the lock tongue (67).

9. The seat cushion lifting mechanism according to claim 1, characterized in that: The locking assembly further includes a lock body (64), the lock body (64) being fixed on the second sleeve (3), a second opening (641) being provided on the lock body (64), and a lock tongue (67), a drive block (66) and a reset member being all provided in the second opening (641) of the lock body (64); The lock body (64) is provided with a third lock hole (642) communicating with the accommodating space, and one end of the lock tongue (67) extends from the third lock hole (642) and is plugged and unplugged into the first lock hole (22).

10. A seat, characterized in that: A seat cushion lifting mechanism comprising any one of claims 1 to 9.

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