Cushion height adjusting assembly and seat

Abstract

The utility model provides a cushion height adjusting assembly and a seat. The seat cushion height adjusting assembly comprises a seat cushion frame, and the seat cushion frame comprises a first side frame and a second side frame which are located on the two sides of the width direction respectively; the driving part is arranged between the first side frame and the second side frame in the width direction; the transmission part comprises a first transmission part and a second transmission part which are arranged on the first side frame and the second side frame respectively, and the first transmission part and the second transmission part are connected with the same driving part so as to receive the driving force output by the driving part; the adjusting part comprises a first adjusting part and a second adjusting part which are arranged on the first side frame and the second side frame respectively, the first adjusting part is connected with the first transmission part, and the second adjusting part is connected with the second transmission part; the first transmission part and the second transmission part transmit driving force output by the same driving part to the first adjusting part and the second adjusting part.

Description

Technical Field

[0001] The present application relates to a cushion height adjustment assembly and a seat. Background Art

[0002] In seats, such as car seats, there is a demand for adjusting the seat cushion height so that the seat can be adjusted to suit passengers of different heights, body shapes and sitting postures, thereby further optimizing the comfort and safety of the seat.

[0003] The traditional structure for achieving seat cushion height adjustment generally sets a motor on one side of the seat cushion frame in the width direction to drive a related adjustment mechanism to adjust the height.

[0004] However, the inventors have discovered that the conventional structure suffers from insufficient structural stability (rigidity), and has problems with vibration and jumping, and / or death noise. Especially for seats with integrated seat belts, the conventional structure may lead to failure in seat belt fixing point tests and frontal collisions due to the lack of locking on the side where the motor is not provided.

[0005] Therefore, there is a need in the art for a seat cushion height adjustment assembly and a seat, which can ensure the structural stability of the seat while achieving the seat cushion height adjustment function. Utility Model Content

[0006] The purpose of this application is to provide a seat cushion height adjustment assembly.

[0007] Another object of the present application is to provide a seat.

[0008] According to the first aspect of the present application, a seat cushion height adjustment assembly includes a seat cushion frame, including a first side frame and a second side frame respectively located on both sides in the width direction; a driving part, which is arranged between the first side frame and the second side frame in the width direction; a transmission part, including a first transmission part and a second transmission part respectively arranged on the first side frame and the second side frame, the first transmission part and the second transmission part are connected to the same driving part to receive the driving force output by the driving part; and an adjustment part, including a first adjustment part and a second adjustment part respectively arranged on the first side frame and the second side frame, the first adjustment part is connected to the first transmission part, and the second adjustment part is connected to the second transmission part; the first transmission part and the second transmission part transmit the driving force output by the same driving part to the first adjustment part and the second adjustment part to drive the first adjustment part and the second adjustment part to drive the first adjustment part and the second adjustment part to move to adjust the seat cushion height.

[0009] The technical solution of the seat cushion height adjustment assembly introduced above is to set a driving part between the first side frame and the second side frame, and transmit the driving force output by the same driving part to the first adjustment part and the second adjustment part located on the first side and the second side in the width direction respectively through the transmission part, so that the rigidity of the structure is good. When it is applied to a seat, it can keep the deformation of both sides balanced during a collision and can withstand high-energy impact, especially for the seat integrated seat belt with the seat belt retractor arranged on the seat, to avoid the seat from being impacted and failing after a collision. That is, compared with the traditional solution of setting a driving motor on one side, the technical solution introduced above ensures the structural stability of the seat on the basis of realizing the seat cushion height adjustment function. In addition, compared with the solution of arranging driving motors on both the first side and the second side, the technical solution introduced above reduces the cost and also has the structural stability that meets the requirements.

[0010] In one or more embodiments of the seat cushion height adjustment assembly, the first transmission part and the second transmission part have the same transmission assembly, and the transmission assembly includes a connecting shaft, a gear assembly, and an output member, and the output member includes a screw-nut mechanism, wherein the driving force transmission path of the seat cushion height adjustment assembly is configured as follows: the rotation output from the driving part is transmitted to the gear assembly through the connecting shaft, and the rotation is output to the nut member of the screw-nut mechanism through the gear assembly, driving the screw member to move linearly.

[0011] In one or more embodiments of the seat height adjustment assembly, the gear assembly includes a worm gear member connected to the connecting shaft, and an output gear member connected to a nut member of the output member; the gear assembly is accommodated in a housing to form a gear box.

[0012] In one or more embodiments of the seat cushion height adjustment assembly, the connecting shaft is a flexible shaft.

[0013] In one or more embodiments of the seat cushion height adjustment assembly, a bracket is further included, the bracket supports the transmission part, the bracket is hinged to a fixed bracket, and the fixed bracket is relatively fixed to the seat cushion frame.

[0014] In one or more embodiments of the seat cushion height adjustment assembly, the first adjustment part and the second adjustment part have the same connecting rod assembly, and the connecting rod assembly includes a first connecting rod, a second connecting rod, and a third connecting rod. The first connecting rod is connected to the transmission part on one side to receive the driving force transmitted by the transmission part, and the first connecting rod is hinged to the second connecting rod on the other side. The first connecting rod is hinged to the seat cushion frame at a position between the one side and the other side; the second connecting rod is hinged to the first connecting rod on one side and to the third connecting rod on the other side; the third connecting rod is hinged to the second connecting rod on one side and to the seat cushion frame on the other side.

[0015] In one or more embodiments of the seat cushion height adjustment assembly, the first connecting rod is hinged to the screw rod member of the transmission assembly of the transmission part.

[0016] In one or more embodiments of the seat cushion height adjustment assembly, the first connecting rod and the third connecting rod are respectively connected to the front end of the seat cushion frame and the rear end of the seat cushion frame.

[0017] A seat according to a second aspect of the present application comprises a seat cushion height adjustment assembly as described in the first aspect.

[0018] In one or more embodiments of the seat, the seat is a seat with a seat-integrated safety belt.

[0019] The beneficial effects of the above embodiments include, but are not limited to, that, due to the adoption of the seat cushion adjustment assembly introduced in the first aspect, the structural stability of the seat is ensured on the basis of realizing the seat cushion height adjustment function. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other features, properties and advantages of the present application will become more apparent through the following description in conjunction with the accompanying drawings and embodiments. In the accompanying drawings, the same reference numerals always represent the same features. It should be noted that these drawings are only examples and are not drawn in proportion. They should not be used to limit the actual scope of protection claimed in the present application. Among them:

[0021] Figure 1 The figure is a schematic structural diagram of a seat cushion height adjustment assembly according to an embodiment of the present invention at a certain viewing angle.

[0022] Figure 2 It is a schematic structural diagram of a seat cushion height adjustment assembly of one embodiment from another perspective.

[0023] Figure 3 The figure is a schematic structural diagram of a seat cushion height adjustment assembly according to an embodiment of the present invention from another perspective.

[0024] Figure 4 It is a partial structural schematic diagram of a driving part and a transmission part of a seat cushion height adjustment assembly according to an embodiment.

[0025] Figure 5 The figure is a schematic structural diagram of a gear assembly of a seat cushion height adjustment assembly according to an embodiment.

[0026] Fig. 6A , Figure 6B Schematic diagrams of the structure in which the adjustment part of the seat cushion height adjustment assembly of an embodiment is located at the lowest height position and the highest height position respectively.

[0027] Figure 7The figure is a schematic diagram of the structure of a seat according to an embodiment.

[0028] Reference numerals:

[0029] 100-seats

[0030] 101-Cushion

[0031] 1011-Front end of the seat cushion

[0032] 1012- rear end of the seat cushion

[0033] 102-Backrest

[0034] 10- Seat height adjustment assembly

[0035] 1- Seat frame

[0036] 11-First side frame

[0037] 12-Second side frame

[0038] 13-Fixed bracket

[0039] 111-Front end of seat frame

[0040] 112-Rear end of the seat frame

[0041] 2-Drive unit

[0042] 3- Transmission unit

[0043] 30-Transmission components

[0044] 301-Connecting shaft

[0045] 302-Gear assembly

[0046] 3021-Worm gear

[0047] 3022-Output gear

[0048] 3023-Gear

[0049] 303-Output

[0050] 3031-Screw rod

[0051] 304-Shell

[0052] 311-First transmission unit

[0053] 312- Second transmission unit

[0054] 4-Regulation Department

[0055] 40-Connecting rod assembly

[0056] 401-First connecting rod

[0057] 402-Second connecting rod

[0058] 403-Third connecting rod

[0059] 411-First Adjustment Unit

[0060] 412-Second Adjustment Unit

[0061] 5- Bracket. DETAILED DESCRIPTION

[0062] Reference will now be made in detail to the various embodiments of the application, the examples of which are shown in the accompanying drawings and are described below. Although the application will be described in conjunction with the exemplary embodiments, it should be appreciated that this specification is not intended to limit the application to those exemplary embodiments. On the contrary, the application is intended to not only cover these exemplary embodiments, but also to cover various alternative forms, modified forms, equivalent forms and other embodiments that may be included in the spirit and scope of the application defined by the appended claims.

[0063] In the following description, the orientation or positional relationship indicated by "front", "rear" or other orientation terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0064] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment" and / or "an embodiment" means a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0065] Although the seat cushion height adjustment assembly disclosed in the embodiment of the present application is applicable to automobile seats to achieve the effect of ensuring the structural stability of the seat on the basis of realizing the seat cushion height adjustment function, it is not limited to this. For example, it can be applicable to other application scenarios of transportation vehicles, such as heavy vehicles, railway trains, and ships, and can also be applicable to fixed places, such as conference halls, auditoriums, cinemas, etc. As long as the seat has the function of seat cushion height adjustment, the unlocking assembly disclosed in the embodiment of the present application can be applied.

[0066] like Figure 7As shown, in some embodiments, the seat 100 includes a cushion 101 and a backrest 102, and the cushion 101 includes a cushion height adjustment assembly 10 which will be described in detail in the following embodiments, so that the height of the front end 1011 and / or the rear end 1012 of the cushion can be adjusted to better adapt to the different heights, body shapes and sitting postures of different passengers to improve the comfort of riding. For example, when the seat 100 is in a large bed mode, the backrest 102 is laid flat, and the rear end 1012 of the cushion 101 can be raised to enable the seat 100 to switch to the large bed mode better. In addition, the retractor of the seat belt is fixed to the seat, for example, fixed to the seat back, rather than fixed to a position outside the seat, so that the seat belt locking function that is more in line with the human body posture at different seat back angles can be realized, providing more effective protection for the occupants. The specific structure of the cushion height adjustment assembly 10 will be introduced below, so as to ensure the structural stability of the seat on the basis of realizing the cushion height adjustment function, especially to avoid the situation where the seat with integrated seat belts crashes and causes structural failure.

[0067] refer to Figures 1 to 6A as well as Figure 6B As shown, in some embodiments, the seat cushion height adjustment assembly 10 includes a seat cushion frame 1 , a driving part 2 , a transmission part 3 and an adjustment part 4 .

[0068] like Figure 1 , Figure 2 as well as Figure 3 As shown, the cushion frame 1 means a fixed frame of the cushion 101, which is a fixed part and constitutes a frame of the cushion height adjustment assembly 10. The cushion frame 1 includes a first side frame 11 and a second side frame 12 respectively located on both sides in the width direction.

[0069] The driving unit 2 refers to a component or assembly that provides the driving force for the cushion height adjustment assembly 10, and generally provides a non-human-driven structure, such as a motor, hydraulic pressure, air pressure, spring, etc. The structure of the driving unit 2 is generally a motor, and the motor type can be a brushed motor, a brushless motor, etc., and the driving motor 1 here should be interpreted in a broad sense, that is, it can refer to a single motor, or a motor assembly consisting of a motor and a gear, similar to the concept of a "reduction motor" commonly used in the art, and is not limited to this. The driving unit 2 is arranged between the first side frame 11 and the second side frame 12 in the width direction.

[0070] The transmission part 3 is a component that transmits the driving force output by the driving part 2 to the adjusting part 4 that directly adjusts the height. The transmission part 3 includes a first transmission part 311 and a second transmission part 312 that are respectively arranged on the first side frame 11 and the second side frame 12. The first transmission part 311 and the second transmission part 312 are connected to the same driving part 2 to receive the driving force output by the driving part 2. It can be understood that a single driving part 2, such as a single driving motor corresponding to the transmission part on both sides, can be a driving motor that is a dual-output shaft motor, and the two output shafts are respectively connected to the first transmission part 311 and the second transmission part 312, but it is not limited thereto.

[0071] The adjustment part 4 includes a first adjustment part 411 and a second adjustment part 412 respectively arranged on the first side frame 11 and the second side frame 12. The first adjustment part 411 is connected to the first transmission part 311, and the second adjustment part 412 is connected to the second transmission part 312. The first adjustment part 411 and the second adjustment part 412 can be connected by a synchronization rod so that the adjustment movements of the two are synchronized. The first transmission part 311 and the second transmission part 312 transmit the driving force output by the same driving part 2 to the first adjustment part 411 and the second adjustment part 412 to drive the first adjustment part 411 and the second adjustment part 412 to move to adjust the seat height.

[0072] The beneficial effects of the technical solution of the seat cushion height adjustment component 10 introduced in the above embodiment include, but are not limited to, by arranging a driving part between the first side frame and the second side frame, and transmitting the driving force output by the same driving part to the first adjustment part and the second adjustment part located on the first side and the second side in the width direction respectively through the transmission part, the rigidity of the structure is better, and when it is applied to a seat, it can maintain balanced deformation on both sides during a collision, and can withstand high-energy impact, especially for the seat integrated seat belt with the seat belt retractor arranged on the seat, to avoid the seat from being impacted and failing after a collision. That is, compared with the traditional solution of arranging a driving motor on one side, the technical solution introduced above can ensure the structural stability of the seat on the basis of realizing the seat cushion height adjustment function. In addition, compared with the solution of arranging driving motors on both the first side and the second side, the technical solution introduced above reduces the cost, and also has the structural stability that meets the requirements.

[0073] like Figures 1 to 5As shown, in some embodiments, the specific structure of the first transmission part 311 and the second transmission part 312 can be that the first transmission part 311 and the second transmission part 312 have the same transmission assembly 30, that is, the first transmission part 311 and the second transmission part 312 can be arranged axially symmetrically with the position of the driving part 2 as the axis. The transmission assembly 30 includes a connecting shaft 301, a gear assembly 302, and an output member 303. The gear assembly here means a component that uses the gear transmission principle for transmission, and does not mean that all components are gears in a narrow sense. The output member 303 includes a screw nut mechanism, wherein the driving force transmission path of the cushion height adjustment assembly 10 is configured as follows: the rotation output from the driving part 2 is transmitted to the gear assembly 302 through the connecting shaft 301, and the rotation is output to the nut member of the screw nut mechanism through the gear assembly 302, driving the screw member 3031 to move linearly. The meaning of the screw nut is similar to that in the art, that is, a structure that converts rotation into linear motion through the screw nut mechanism, so that the structure of the transmission part is simple, reliable, and low in cost.

[0074] Further references Figure 5 As shown, the specific structure of the gear assembly 302 may be that the gear assembly 302 includes a worm gear member 3021 connected to the connecting shaft 301, and an output gear member 3022 connected to the nut member of the output member 303; the gear assembly 302 is accommodated in the housing 304 to form a gear box, and the above-mentioned worm gear member 3021 means that the connecting shaft 301 is fixedly connected to the worm gear member 3021, so that the two together substantially constitute a worm in the worm-worm transmission structure, and in addition, one or more gears 3023 may be arranged between the output gear member 3022 and the worm gear member 3021 to adjust the height and transmission ratio of the gear assembly 302. The structure of the worm gear member 3021 and the output gear member 3022 is compact, so that the transmission assembly can be integrated in a smaller space, and the seat cushion height adjustment assembly 10 is easy to be arranged in the space occupied by the seat cushion frame 1. In some embodiments, the connecting shaft 301 is a soft shaft, that is, a shaft with low rigidity, elasticity, and free bending for transmission. It is used to connect two shafts with different axes and not in the same direction or with relative motion to transmit rotational motion and torque. In this way, the rotational motion and torque can be transmitted flexibly, which is further beneficial to the arrangement of the transmission part of the seat cushion height adjustment assembly 10 in the space occupied by the seat cushion frame 1.

[0075] Continue to refer Figure 4 as well as Fig. 6A as well as Figure 6BAs shown, in some embodiments, the cushion height adjustment assembly 10 further includes a bracket 5, the bracket 5 supports the transmission part 3, the bracket 5 is hinged to the fixed bracket 13, and the fixed bracket 13 is relatively fixed to the cushion frame 1. The specific structure of the hinge can be a common hinge structure such as a pin, a rivet, a screw, a stud, a bolt, etc., which will not be repeated here. The structure in which the fixed bracket 13 and the cushion frame 1 are relatively fixed can be a structure in which the fixed bracket 13 and the cushion frame 1 are split structures as shown in the figure and are fixed by fasteners, welding and other fixing structures, or a structure in which the fixed bracket 13 and the cushion frame 1 are integrated. The structure in which the bracket 5 supports the transmission part 3 can further improve the rigidity, and the bracket 5 is hinged to the fixed bracket 13, which can transform the displacement that may occur when the transmission part 3 is subjected to vibration, etc., avoid the transmission part 3 and the adjustment part 4 from getting stuck, etc., and further improve the reliability and service life of the adjustment assembly.

[0076] Continue to refer Figures 1 to 6A , Figure 6B As shown, in some embodiments, the specific structure of the first adjustment part 411 and the second adjustment part 412 can be that the first adjustment part 411 and the second adjustment part 412 have the same connecting rod assembly 40, and the connecting rod assembly 40 includes a first connecting rod 401, a second connecting rod 402, and a third connecting rod 403. The first connecting rod 401 is connected to the transmission part 3 on one side to receive the driving force transmitted by the transmission part 3, and the first connecting rod 401 is hinged to the second connecting rod 402 on the other side. The first connecting rod 401 is hinged to the cushion frame 1 at a position between one side and the other side; the second connecting rod 401 is hinged to the first connecting rod 401 on one side and hinged to the third connecting rod 403 on the other side; the third connecting rod 403 is hinged to the second connecting rod 402 on one side and hinged to the cushion frame 1 on the other side. The mechanism of the adjustment assembly formed in this way is a simple hinged four-bar mechanism, and the structure is reliable. Similarly, the specific structure of the hinge here can be a common hinge structure such as a pin, a rivet, a screw, a stud, a bolt, etc., which will not be repeated here. In some embodiments, the connection structure between the first connecting rod 401 and the transmission part 3 can be that the first connecting rod 401 is hinged with the screw rod 3031 of the transmission assembly 30, which can make the operation of the adjustment mechanism more reliable and further avoid the occurrence of mechanism jamming.

[0077] Specifically, if Fig. 6A as well as Figure 6BAs shown, the adjustment process from the lowest height position to the highest height position of the adjustment part of the seat cushion height adjustment assembly can be that the first connecting rod 401 is connected to the transmission part 3 on one side, receives the driving force transmitted by the transmission part 3, so that the first connecting rod 401 rotates around the position hinged with the seat cushion frame 1 on one side, thereby driving the first connecting rod 401 to rotate around the position hinged with the seat cushion frame 1 on the other side, thereby driving the height of the hinge of the second connecting rod 402 to increase, and then driving the third connecting rod 403 hinged with the second connecting rod 402 to rotate, thereby realizing height adjustment.

[0078] In some embodiments, the first connecting rod 401 and the third connecting rod 403 are connected to the front end 111 and the rear end 112 of the cushion frame, respectively. The front end and the rear end are not strictly limited to the end points in the front and rear directions, but can be areas close to the end points. This makes it easier to adjust the height of the front end 1011 and / or the rear end 1012 of the cushion.

[0079] In summary, the beneficial effects of the seat cushion height adjustment assembly and the seat introduced in the above embodiments include but are not limited to that by arranging a driving part between the first side frame and the second side frame, and transmitting the driving force output by the same driving part to the first adjustment part and the second adjustment part located on the first side and the second side in the width direction respectively through the transmission part, the rigidity of the structure is better. When it is applied to a seat, it can maintain balanced deformation on both sides during a collision and can withstand high-energy impact, especially for the seat integrated with the seat belt retractor arranged on the seat, so as to avoid the seat from being impacted and failing after a collision. That is, compared with the traditional solution of arranging a driving motor on one side, the technical solution introduced above can realize the seat cushion height adjustment function while ensuring the structural stability of the seat. In addition, compared with the solution of arranging driving motors on both the first side and the second side, the technical solution introduced above reduces the cost and also has the structural stability that meets the requirements.

[0080] Although the present application is disclosed as above with preferred embodiments, it is not intended to limit the present application, and any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, any modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application shall fall within the scope of protection defined by the claims of the present application.

Claims

1. A seat cushion height adjustment assembly (10), characterized in that: include: A cushion frame (1) comprises a first side frame (11) and a second side frame (12) respectively located on both sides in a width direction; A driving unit (2) is arranged between the first side frame (11) and the second side frame (12) in the width direction; The transmission part (3) comprises a first transmission part (311) and a second transmission part (312) respectively arranged on the first side frame (11) and the second side frame (12), wherein the first transmission part (311) and the second transmission part (312) are connected to the same driving part (2) to receive the driving force output by the driving part (2); as well as The adjusting part (4) comprises a first adjusting part (411) and a second adjusting part (412) which are respectively arranged on the first side frame (11) and the second side frame (12); the first adjusting part (411) is connected to the first transmission part (311), and the second adjusting part (412) is connected to the second transmission part (312); the first transmission part (311) and the second transmission part (312) transmit the driving force output by the same driving part (2) to the first adjusting part (411) and the second adjusting part (412) to drive the first adjusting part (411) and the second adjusting part (412) to move so as to adjust the height of the seat cushion.

2. The seat cushion height adjustment assembly (10) according to claim 1, characterized in that: The first transmission part (311) and the second transmission part (312) have the same transmission assembly (30), and the transmission assembly (30) includes a connecting shaft (301), a gear assembly (302), and an output member (303), and the output member (303) includes a screw-nut mechanism, wherein the driving force transmission path of the seat height adjustment assembly (10) is configured as follows: the rotation output from the driving part (2) is transmitted to the gear assembly (302) through the connecting shaft (301), and the rotation is output to the nut member of the screw-nut mechanism through the gear assembly (302), thereby driving the screw member (3031) to move linearly.

3. The seat cushion height adjustment assembly (10) according to claim 2, characterized in that: The gear assembly (302) comprises a worm gear member (3021) connected to the connecting shaft (301), and an output gear member (3022) connected to a nut member of the output member (303); the gear assembly (302) is accommodated in a housing (304) to form a gear box.

4. The seat cushion height adjustment assembly (10) according to claim 2, characterized in that: The connecting shaft (301) is a flexible shaft.

5. The seat cushion height adjustment assembly (10) according to claim 1, characterized in that: It also comprises a bracket (5), wherein the bracket (5) supports the transmission part (3), the bracket (5) is hinged to a fixed bracket (13), and the fixed bracket (13) is relatively fixed to the cushion frame (1).

6. The seat cushion height adjustment assembly (10) according to claim 1, characterized in that: The first adjustment part (411) and the second adjustment part (412) have the same connecting rod assembly (40), and the connecting rod assembly (40) includes a first connecting rod (401), a second connecting rod (402), and a third connecting rod (403). The first connecting rod (401) is connected to the transmission part (3) on one side to receive the driving force transmitted by the transmission part (3), and the first connecting rod (401) is hinged to the second connecting rod (402) on the other side. The first connecting rod (401) is hinged to the cushion frame (1) at a position between the one side and the other side; the second connecting rod (402) is hinged to the first connecting rod (401) on one side, and is hinged to the third connecting rod (403) on the other side; the third connecting rod (403) is hinged to the second connecting rod (402) on one side, and is hinged to the cushion frame (1) on the other side.

7. The seat cushion height adjustment assembly (10) according to claim 6, characterized in that: The first connecting rod (401) is hingedly connected to the screw rod member (3031) of the transmission assembly (30) of the transmission part (3).

8. The seat cushion height adjustment assembly (10) according to claim 6, characterized in that: The first connecting rod (401) and the third connecting rod (403) are respectively connected to the front end (111) and the rear end (112) of the seat cushion frame.

9. A seat (100), characterized in that: It comprises a seat cushion (101), wherein the seat cushion (101) comprises a seat cushion height adjustment assembly (10) according to any one of claims 1 to 8.

10. The seat (100) according to claim 9, characterized in that: The seat (100) is a seat with an integrated safety belt.

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