Chassis assembly and seat

Abstract

The invention discloses a chassis assembly and a seat. The chassis assembly comprises a base, a backrest, an angle adjusting module and a first elastic piece. The backrest is rotationally connected to the base, the angle adjusting module comprises a clutch and a first driving part, when the clutch is in a disengaged state, transmission connection between the first driving part and the backrest is disconnected, and when the clutch is in a combined state, the first driving part is in transmission connection with the backrest through the clutch. When the clutch is in a disengaged state, elasticity of the first elastic piece is used for driving the backrest to rotate forwards so as to reset. By arranging the structure of the first elastic piece, the clutch and the first driving piece, the clutch can enable the first driving piece to be separated from or combined with the backrest, so that the backrest can be passively adjusted by virtue of resilience force of the first elastic piece, and can also be actively adjusted by virtue of the first driving piece after the clutch is in a combined state; diversified requirements are met, and the use experience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of seat manufacturing, and particularly relates to a chassis assembly and a seat. Background Art

[0002] At present, seats are a kind of equipment used in daily life by people. And a comfortable seat backrest is one of the demands of people. One of the factors affecting the comfort of the backrest is the rotatable adjustment of the backrest. There are structures in the prior art that can adjust the rotation angle of the seat backrest. However, the rotation angle of the backrest is often fixed after adjustment, and in actual experience, it will feel that the backrest cannot rotate flexibly anymore, resulting in a poor experience. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a chassis assembly that can actively adjust the angle of the backrest and also enable the backrest to automatically adapt to the tilt angle according to the force and weight of the user leaning back.

[0004] The present invention also provides a seat having the above-mentioned chassis assembly.

[0005] The chassis assembly according to the first aspect embodiment of the present invention includes a base, a backrest, an angle adjustment module, and a first elastic member. The backrest is rotatably connected to the base. The angle adjustment module includes a clutch and a first driving member. The clutch has a disengaged state and an engaged state. When the clutch is in the disengaged state, the transmission connection between the first driving member and the backrest is disconnected. When the clutch is in the engaged state, the first driving member is in transmission connection with the backrest through the clutch, and the first driving member can drive the backrest to rotate back and forth relative to the base. Two ends of the first elastic member are respectively connected to the backrest and the base. When the clutch is in the disengaged state, the elastic force of the first elastic member is used to drive the backrest to rotate forward to reset.

[0006] The chassis assembly according to the embodiments of the present invention has at least the following beneficial effects: In the prior art, one is an active adjustment mechanism, specifically including a manual adjustment mechanism or an electric adjustment mechanism. Often, after adjustment, the angle of the backrest cannot change anymore and cannot adaptively attach to the user's back. The other is a passive adjustment mechanism, that is, the chassis assembly that can attach to the user's back often rotates by setting a first elastic member and the like to pull the first elastic member, and uses the resilience of the first elastic member to bring the sense of attachment of the backrest to the user. However, this design cannot be provided with an angle adjustment mechanism because the rotation of the two on the backrest will cause conflicts. Therefore, the overall experience is not very good. The chassis assembly of the embodiments of the present invention, through the structure of setting a first elastic member, a clutch, and a first driving member, the clutch can disconnect or combine the first driving member with the backrest. Therefore, the backrest can be passively adjusted by the resilience of the first elastic member, or can be actively adjusted by the first driving member after the clutch is in the combined state, meeting diverse needs and improving the usage experience.

[0007] According to some embodiments of the present invention, the first driving member includes a first motor and a push rod connected to each other. The first motor is fixedly installed on the backrest, and one end of the push rod away from the first motor is rotatably connected to the base. When the clutch is in the combined state, the first motor is used to drive the push rod to extend and retract so that the backrest rotates relative to the base.

[0008] According to some embodiments of the present invention, the backrest is provided with an arc-shaped groove, and the chassis assembly includes a fixed rod. The fixed rod passes through the arc-shaped groove and the base. When the backrest rotates backward, the fixed rod slides relative to the arc-shaped groove.

[0009] According to some embodiments of the present invention, the clutch includes a first clamping member and a second driving member. The second driving member is used to drive the first clamping member to connect or disconnect from the backrest. The first clamping member is movably sleeved on the fixed rod. When the clutch is in the combined state, the first clamping member is fixedly connected to the backrest, and the push rod is used to push the backrest to rotate around the central axis of the fixed rod.

[0010] According to some embodiments of the present invention, the clutch further includes a second elastic member. The second driving member includes a second motor and a clutch block. The second motor is fixedly installed on the base. The clutch block is sleeved on the fixed rod. There are two first clamping members, and the two first clamping members respectively abut against two ends of the clutch block. Two ends of the second elastic member respectively abut against the first clamping member and the backrest. The second motor is configured to drive the clutch block to rotate around a first axis, so that the clutch block abuts against the two first clamping members to fixedly connect the backrest. The first axis is perpendicular to the central axis of the fixed rod. The second elastic member is configured to urge the first clamping member to disengage from the backrest.

[0011] According to some embodiments of the present invention, a first abutting area and a second abutting area are provided on an outer surface of the clutch block. The first abutting area is closer to the first axis than the second abutting area. When the clutch is in a disengaged state, the first abutting area abuts against the first clamping member, and the first clamping member disengages from the backrest. When the clutch is in an engaged state, the second abutting area abuts against the first clamping member, and the first clamping member is fixedly connected to the backrest.

[0012] According to some embodiments of the present invention, the clutch is installed on the backrest. The first driving member includes a third motor and an output shaft. An output end of the third motor is connected to the output shaft. The output shaft is rotatably installed on the base. When the clutch is in the engaged state, the output shaft is fixedly connected to the backrest. The third motor is configured to drive the output shaft to rotate, so that the backrest rotates relative to the base.

[0013] According to some embodiments of the present invention, the clutch includes a second clamping member, a sleeve, a third elastic member, and a fourth motor. The sleeve is sleeved on the output shaft. There are two second clamping members, and the two second clamping members respectively abut against two ends of the sleeve. A third abutting area is provided at an end of the second clamping member close to the sleeve. The third abutting area is configured to abut against the sleeve. The third abutting area is inclined relative to the central axis of the output shaft. The fourth motor is configured to drive the sleeve to rotate around the central axis of the output shaft, so that the sleeve abuts against the two second clamping members to fixedly connect the first driving member. Two ends of the third elastic member respectively abut against the second clamping member and the first driving member. The third elastic member is configured to urge the second clamping member to disengage from the first driving member.

[0014] According to some embodiments of the present invention, the chassis assembly further includes a seat cushion. The seat cushion is disposed above the base. The seat cushion includes a first housing member, a second housing member, and a seat depth adjustment module. The second housing member is slidably connected to the first housing member. The seat depth adjustment module includes a gear bar and a gear pin that can move relative to the gear bar. The gear bar is provided with a plurality of spaced-apart gear slots along the sliding direction of the second housing member. The gear bar is mounted on the first housing member, and the gear pin is mounted on the second housing member. When the gear pin is placed in any one of the gear slots, the seat depth adjustment module restricts the second housing member from sliding relative to the first housing member.

[0015] The seat according to the second aspect embodiment of the present invention includes the chassis assembly according to any one of the first aspect embodiments.

[0016] The seat according to the embodiment of the present invention has at least the following beneficial effects: The chassis assembly of the embodiment of the present invention, through the structure of the first elastic member, the clutch, and the first driving member, the clutch can disengage or engage the first driving member from the backrest. Therefore, the backrest can be passively adjusted by the resilience of the first elastic member, or after the clutch is in the engaged state, the first driving member can be used to actively adjust the backrest, meeting diverse needs and enhancing the use experience of the seat including the first aspect embodiment.

[0017] The additional aspects and advantages of the present invention will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following further describes the present invention in conjunction with the drawings and embodiments, where: Figure 1 is the first perspective view of the chassis assembly in the first embodiment of the present invention; Figure 2 is the internal structure diagram of the base of the chassis assembly in the first embodiment of the present invention; Figure 3 is the side view structure diagram of the chassis assembly in the first embodiment of the present invention; Figure 4 is the second perspective view of the chassis assembly in the first embodiment of the present invention; Figure 5 is Figure 4 the enlarged view of area A in Figure 6 is the structure diagram of the clutch of the chassis assembly in the first embodiment of the present invention; Figure 7 is Figure 6 the enlarged view of area B in Figure 8Schematic diagram of the internal structure of the clutch of the chassis assembly in the first embodiment of the present invention; Figure 9 First perspective view of the chassis assembly in the second embodiment of the present invention; Figure 10 Second perspective view of the chassis assembly in the second embodiment of the present invention; Figure 11 is Figure 10 Enlarged view of area C in; Figure 12 Exploded view of the seat cushion of the chassis assembly in the first embodiment of the present invention.

[0019] Reference numerals: Chassis assembly 100, Base 101, Backrest 102, Seat cushion 103, First elastic member 201, Third housing member 202, Fourth housing member 203, Fifth housing member 204, Clutch 205, First driving member 301, Arc groove 302, Fixed rod 303, First shaft 304, Second shaft 305, First motor 401, Push rod 402, First clamping member 501, Second driving member 502, Second motor 503, Clutch block 504, First abutting area 701, Second abutting area 702, Abutting block 703, Lead screw 704, First axis 705, Second elastic member 801, Third motor 901, Sleeve 902, Second clamping member 903, Output shaft 1001, Third abutting area 1101, Fourth motor 1102, Connecting gear disc 1103, First housing member 1201, Second housing member 1202, Gear bar 1203, Gear pin 1204, Dial block 1205, Tension spring 1206, Gear slot 1207. Detailed description of the specific implementation mode

[0020] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described by referring to the drawings below are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0021] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0022] In the description of the present invention, the meaning of "several" is more than one, the meaning of "multiple" is more than two, and understandings such as "greater than", "less than", "exceeding", etc. do not include the recited number, while understandings such as "above", "below", "within", etc. include the recited number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0023] In the description of the present invention, unless otherwise clearly defined, terms such as "arrangement", "installation", "connection", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0024] In the description of the present invention, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0025] Reference Figures 1 to 4, the chassis assembly 100 according to the embodiment of the first aspect of the present invention includes a base 101, a backrest 102, an angle adjustment module, and a first elastic member 201. The backrest 102 is rotatably connected to the base 101. The angle adjustment module includes a clutch 205 and a first driving member 301. The clutch 205 has a disengaged state and an engaged state. When the clutch 205 is in the disengaged state, the transmission connection between the first driving member 301 and the backrest 102 is disconnected. When the clutch 205 is in the engaged state, the first driving member 301 is in transmission connection with the backrest 102 through the clutch 205, and the first driving member 301 can drive the backrest 102 to rotate forward and backward relative to the base 101. The two ends of the first elastic member 201 are respectively connected to the backrest 102 and the base 101. When the clutch 205 is in the disengaged state, the elastic force of the first elastic member 201 is used to drive the backrest 102 to rotate forward to reset. In the prior art, one is an active adjustment mechanism, specifically including a manual adjustment mechanism or an electric adjustment mechanism. Often, after adjustment, the angle of the backrest 102 cannot change anymore and cannot adaptively attach to the user's backrest 102. The other is a passive adjustment mechanism. The chassis assembly 100 that can attach to the user's back often pulls the first elastic member 201 after rotating it by setting the first elastic member 201, etc., and uses the return elastic force of the first elastic member 201 to bring the attachment feeling of the backrest 102 to the user. However, this design cannot design an angle adjustment mechanism anymore because the rotation of the two to the backrest 102 will cause conflicts. Therefore, the comprehensive experience is not very good. The chassis assembly 100 of the embodiment of the present invention, through the structure of setting the first elastic member 201, the clutch 205, and the first driving member 301, the clutch 205 can disengage or engage the first driving member 301 and the backrest 102. Therefore, the backrest 102 can be passively adjusted by the return elastic force of the first elastic member 201, or the first driving member 301 can be used to actively adjust the backrest 102 after the clutch 205 is in the engaged state, meeting diverse needs and improving the use experience.

[0026] It should be noted that the disconnection of the transmission connection described in the text means that when the clutch 205 is in the disengaged state, even if the first driving member 301 operates, the backrest 102 will not be driven by the first driving member 301. At this time, the adjustment of the backrest 102 is automatically adjusted by the first elastic member 201. And the first elastic member 201 driving the backrest 102 to reset mentioned in the text means that after the user does not lean on the backrest 102, the backrest 102 will rotate forward, and this process is reset. And because of the reset function, when the user leans on the backrest 102, the first elastic member 201 will drive the backrest 102 to fit with the user's back, thereby improving the use experience.

[0027] Reference Figures 3 to 5, in some embodiments of the present invention, the first driving member 301 includes a first motor 401 and a push rod 402 connected to each other. The first motor 401 is fixedly installed on the backrest 102, and one end of the push rod 402 away from the first motor 401 is rotatably connected to the base 101. When the clutch 205 is in the combined state, the first motor 401 is used to drive the push rod 402 to expand and contract, so that the backrest 102 rotates relative to the base 101. Specifically, referring to Figure 3 and Figure 4 , the push rod 402 is rotatably connected to the first shaft 304, and the base 101 and the backrest 102 are rotatably connected through the second shaft 305. The backrest 102 can rotate relative to the base 101 around the second shaft 305. The first shaft 304 and the second shaft 305 are arranged at intervals to achieve the above rotation. The design of the push rod 402 allows the first driving member 301 to be installed inside the backrest 102, improving space utilization and aesthetics. The first motor 401 is fixedly installed on the backrest 102, and the push rod 402 is rotatably connected to the base 101. Therefore, when the push rod 402 expands and contracts, it will naturally drive the backrest 102 to rotate relative to the base 101. It should be noted that in some embodiments of the present invention, it can also be as shown in Figures 8 to 11 , the first driving member 301 is arranged on the base 101, and the first driving member 301 can also be used to drive the backrest 102 to rotate relative to the base 101 by setting different clutch structures.

[0028] It should be noted that referring to Figure 2 and Figure 3 , in some embodiments of the present invention, the base 101 includes a third housing member 202, a fourth housing member 203, and a fifth housing member 204. The third housing member 202 is arranged above the fifth housing member 204. Both ends of the fourth housing member 203 are rotatably connected to the third housing member 202 and the fifth housing member 204. The backrest 102 is rotatably connected to one end of the third housing member 202 away from the fourth housing member 203. One end of the first elastic member 201 is connected to the fifth housing member 204, and the other end of the first elastic member 201 is connected to the fourth housing member 203. When the backrest 102 rotates backward, the backrest 102 drives the third housing member 202 and the fourth housing member 203 to rotate, so that the first elastic member 201 is compressed. The resilience of the first elastic member 201 is used to drive the backrest 102 to rotate forward. By setting multiple housing members and making adjacent housing members rotatably connected, the automatic reset of the backrest 102 is realized by using the link structure and the resilience of the first elastic member 201, and the arrangement position of the first elastic member 201 can be made more flexible and diverse. For example, as shown in Figure 2 , the first elastic member 201 can be arranged between the third housing member 202 and the fifth housing member 204 to improve space utilization and aesthetics. It should be noted that Figure 3A partial perspective view is adopted to show the parts of the third housing member 202, the fourth housing member 203, the backrest 102, and the first elastic member 201 that are blocked, so as to facilitate understanding of their movement principles.

[0029] Reference Figure 3 , in some embodiments of the present invention, the backrest 102 is provided with an arc-shaped groove 302, and the chassis assembly 100 includes a fixing rod 303. The fixing rod 303 passes through the arc-shaped groove 302 and the base 101. When the backrest 102 rotates backward, the fixing rod 303 slides relative to the arc-shaped groove 302. The fixing rod 303 is used as a connection structure when the clutch 205 performs a clutch action. By arranging the fixing rod 303 in the arc-shaped groove 302, the rotation of the backrest 102 and the setting of the fixing rod 303 do not interfere with each other, and a fixed trajectory is provided for the rotation of the backrest 102. It should be noted that, reference Figure 3 , the main function of the arc-shaped groove 302 is that when the clutch 205 is in a disengaged state, the first elastic member 201 provides a fixed trajectory when participating in the rotation of the backrest 102, that is, at this time, the rotation of the backrest 102 is consistent with the trajectory of the arc-shaped groove 302. When the clutch 205 is in an engaged state, the first elastic member 201 does not participate in the rotation action of the backrest 102, and the clutch 205 drives the backrest 102 to rotate. At this time, the rotation trajectory rotates around the central axis of the fixing rod 303. The specific principle is described in the technical features of the clutch 205 below.

[0030] Reference Figure 2 , Figures 4 to 8 , in some embodiments of the present invention, the clutch 205 includes a first clamping member 501 and a second driving member 502. The second driving member 502 is used to drive the first clamping member 501 to connect or disengage from the backrest 102. The first clamping member 501 is movably sleeved on the fixing rod 303. When the clutch 205 is in an engaged state, the first clamping member 501 is fixedly connected to the backrest 102, and the push rod 402 is used to push the backrest 102 to rotate around the central axis of the fixing rod 303. The specific principle is as follows: The second driving member 502 drives the first clamping member 501 to move and makes the first clamping member 501 clamp on the backrest 102 so that the clutch 205 is in an engaged state. Since the first clamping member 501 is sleeved on the fixing rod 303, the positions of the fixing rod 303 and the backrest 102 are also relatively fixed. At this time, the first driving member 301 drives the backrest 102 to rotate, and the backrest 102 rotates around the central axis of the fixing rod 303. In this way, the rotation of the backrest 102 does not interfere with the clutch 205. When the clutch 205 is in a disengaged state, the part of the backrest 102 that is not connected to the clutch 205, so the backrest 102 can slide along the trajectory of the arc-shaped groove 302. At this time, the first elastic member 201 affects the rotation of the backrest 102.

[0031] It should be noted that, referenceFigure 6 and Figure 7 , in some embodiments of the present invention, the fixed connection between the first clamping member 501 and the backrest 102 is achieved by tooth-groove meshing, which is more convenient for disengagement and connection. In some embodiments, a friction disc or other clamping methods can also be used to achieve the fixed connection.

[0032] Refer to Figures 4 to 8 , in some embodiments of the present invention, the clutch 205 further includes a second elastic member 801. The second driving member 502 includes a second motor 503 and a clutch block 504. The second motor 503 is fixedly installed on the base 101. The clutch block 504 is sleeved on the fixed rod 303. There are two first clamping members 501, and the two first clamping members 501 respectively abut against both ends of the clutch block 504. Both ends of the second elastic member 801 respectively abut against the first clamping member 501 and the backrest 102. The second motor 503 is used to drive the clutch block 504 to rotate around the first axis 705, so that the clutch block 504 abuts against the two first clamping members 501 to fixedly connect the backrest 102. The first axis 705 is perpendicular to the central axis of the fixed rod 303. The second elastic member 801 is used to drive the first clamping member 501 to disengage from the backrest 102. Such a design only requires a single clutch block 504 to achieve the fixed connection of the backrest 102 in two directions. The two first clamping members 501 can more firmly connect the backrest 102 to prevent loosening, which is convenient for subsequent driving. The fixed installation of the second motor 503 on the base 101 can make the position of the clutch 205 itself relatively stable, while the movable clutch block 504 and the first clamping member 501 are both sleeved on the fixed rod 303. As mentioned above, when the clutch 205 is in the combined state, the backrest 102 will rotate around the central axis of the fixed rod 303 after being driven by the first driving member 301. Therefore, the clutch block 504 and the first clamping member 501 will not be affected. The second elastic member 801 can make the first clamping member 501 automatically disengage and reset when the clutch 205 is in the disengaged state, so as to facilitate the next combination of the clutch 205.

[0033] Refer to Figures 6 to 8, in some embodiments of the present invention, the outer surface of the clutch block 504 is provided with a first abutting area 701 and a second abutting area 702. The first abutting area 701 is closer to the first axis 705 than the second abutting area 702. When the clutch 205 is in the disengaged state, the first abutting area 701 abuts against the first engaging member 501, and the first engaging member 501 is disengaged from the backrest 102. When the clutch 205 is in the combined state, the second abutting area 702 abuts against the first engaging member 501, and the first engaging member 501 is fixedly connected to the backrest 102. The distances between the first abutting area 701 and the second abutting area 702 and the first axis 705 are different. When the clutch block 504 rotates, the distance between the first engaging member 501 and the clutch block 504 also changes, so as to achieve the technical effect of enabling the first engaging member 501 to move axially along the fixed rod 303, thereby changing the distance between the first engaging member 501 and the backrest 102, and making the first engaging member 501 connect to or disengage from the backrest 102. The core action of the clutch block 504 is to push the two first engaging members 501 to move to both sides. Therefore, in addition to using the Figure 8 shape shown in, it can also use an oval shape, a long strip shape, etc., and the technical effect can also be achieved. Further, when the connection between the first engaging member 501 and the backrest 102 is through a friction disc, the distance difference between the first abutting area 701 and the second abutting area 702 and the first axis 705 can also be changed, so as to change the movement stroke of the first engaging member 501 to meet the requirements of different connection sizes and tightness degrees.

[0034] Specifically, referring to Figure 7 , in some embodiments of the present invention, the way to rotate the clutch block 504 is to connect the second motor 503 to the clutch block 504 using a lead screw 704 transmission structure. The lead screw 704 is arranged along the axial direction of the fixed rod 303. The second motor 503 drives the abutting block 703 on the lead screw 704 to reciprocate, so that both ends of the clutch block 504 swing reciprocally along the axial direction of the fixed rod 303. In some embodiments, the rotation of the clutch block 504 can also be achieved by using structures such as a gear rack, a worm and worm gear, etc.

[0035] Referring to Figures 9 to 11, in some embodiments of the present invention, the clutch 205 is installed on the backrest 102. The first driving member 301 includes a third motor 901 and an output shaft 1001. The output end of the third motor 901 is connected to the output shaft 1001. The output shaft 1001 is rotatably installed on the base 101. When the clutch 205 is in the combined state, the output shaft 1001 is fixedly connected to the backrest 102. The third motor 901 is used to drive the output shaft 1001 to rotate so that the backrest 102 rotates relative to the base 101. This structure is the second embodiment of the present invention. In this embodiment, the first driving member 301 is installed on the base 101 and the clutch 205 is installed on the backrest 102. When the clutch 205 is in the combined state, the first driving member 301 is connected to the backrest 102 through the clutch 205, thereby realizing the control of the first driving member 301 over the backrest 102. Such a design is simpler in structure. The above-mentioned first embodiment installs the first driving member 301 on the backrest 102, with a higher degree of space utilization. Any structure in the embodiments can be used according to the usage requirements.

[0036] Reference Figure 10 and Figure 11, in some embodiments of the present invention, the clutch 205 includes a second engaging member 903, a sleeve 902, a third elastic member, and a fourth motor 1102. The sleeve 902 is sleeved on the output shaft 1001. There are two second engaging members 903, and the two second engaging members 903 respectively abut against both ends of the sleeve 902. A third abutting area 1101 is provided at one end of the second engaging member 903 close to the sleeve 902. The third abutting area 1101 is used to abut against the sleeve 902. The third abutting area 1101 is inclined relative to the central axis of the output shaft 1001. The fourth motor 1102 is used to drive the sleeve 902 to rotate around the central axis of the output shaft 1001, so that the sleeve 902 abuts against the two second engaging members 903 to fixedly connect the first driving member 301. The two ends of the third elastic member respectively abut against the second engaging member 903 and the first driving member 301. The third elastic member is used to drive the second engaging member 903 to disengage from the first driving member 301. The structure of the clutch 205 in this second embodiment is different from that of the clutch 205 in the above first embodiment, but the core principle is to use the movement of the sleeve 902 (equivalent to the clutch block 504) to drive the second engaging members 903 (equivalent to the first engaging member 501) on both sides to move axially along the output shaft 1001 (equivalent to the fixed rod 303), so as to realize the disconnection and connection with the first driving member 301. The specific principle is that the sleeve 902 rotates around the central axis of the output shaft 1001, and a third abutting area 1101 for abutting against the sleeve 902 is provided on the second engaging member 903, and the third abutting area 1101 is inclined relative to the central axis of the output shaft 1001. Therefore, when the sleeve 902 rotates, the distance between the second engaging member 903 and the sleeve 902 will also change, so as to realize the technical effect of the movement of the second engaging member 903. The third elastic member is also to enable the second engaging member 903 to automatically disengage from the first driving member 301 and reset when the clutch 205 is in the disengaged state. It should be noted that referring to Figure 11 , the disconnection and connection between the second engaging member 903 and the first driving member 301 are through their own tooth grooves and Figure 11 the connecting tooth disc 1103 therein. The connecting tooth disc 1103 engaged with the second engaging member 903 is fixedly connected to the output shaft 1001, that is, the fourth motor 1102, and overall it is to connect the first driving member 301.

[0037] Referring to Figure 12, in some embodiments of the present invention, the chassis assembly 100 further includes a seat cushion 103. The seat cushion 103 is disposed above the base 101. The seat cushion 103 includes a first housing member 1201, a second housing member 1202, and a seat depth adjustment module. The second housing member 1202 is slidably connected to the first housing member 1201. The seat depth adjustment module includes a gear bar 1203 and a gear pin 1204 that can move relative to the gear bar 1203. The gear bar 1203 is provided with a plurality of spaced-apart gear slots 1207 along the sliding direction of the second housing member 1202. The gear bar 1203 is mounted on the first housing member 1201, and the gear pin 1204 is mounted on the second housing member 1202. When the gear pin 1204 is placed in any gear slot 1207, the seat depth adjustment module restricts the second housing member 1202 from sliding relative to the first housing member 1201. The seat depth adjustment module can enable the seat depth of the backrest 102 assembly to have a larger adjustment range, adapt to the seat depth requirements of different users, and improve the applicable scenarios of the product. Specifically, by adjusting the second housing member 1202 to slide relative to the first housing member 1201, the design of the gear bar 1203, the gear slots 1207, and the gear pin 1204 can make the seat depth adjustment more stable when the size is fixed, and the structure is simple without setting motors, etc., and the operation is convenient. Specifically, refer to Figure 12 , in some embodiments of the present invention, by setting a tension spring 1206 to pull the second housing member 1202 to slide relative to the first housing member 1201, so that after the gear pin 1204 disengages from the gear slot 1207, the second housing member 1202 can slide under the drive of the tension spring 1206. When it slides to a suitable position, the gear pin 1204 can be inserted into the gear slot 1207. The movement of the gear pin 1204 can be designed through a dial 1205 and a spring. Rotating the dial 1205 makes the gear pin 1204 move in the vertical direction, and the spring is used to reset the gear pin 1204. The structure is simple and the operation is convenient.

[0038] The seat according to the second aspect embodiment of the present invention includes the chassis assembly 100 of any one of the first aspect embodiments. The chassis assembly 100 of the embodiment of the present invention, through the structure of setting the first elastic member 201, the clutch 205, and the first driving member 301, the clutch 205 can disengage or combine the first driving member 301 with the backrest 102. Therefore, the backrest 102 can be passively adjusted by the resilience of the first elastic member 201, or the backrest 102 can be actively adjusted by using the first driving member 301 after the clutch 205 is in the combined state, meeting diverse requirements and improving the use experience of the seat including the first aspect embodiment.

[0039] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

Claims

1. Chassis assembly, characterized in that, include: Pedestal; a backrest, the backrest being rotatably connected to the base; An angle adjustment module, the angle adjustment module comprises a clutch and a first driving member, the clutch has a disengaged state and a coupled state, when the clutch is in the disengaged state, the transmission connection between the first driving member and the backrest is disconnected, when the clutch is in the coupled state, the first driving member is transmission-connected to the backrest through the clutch, and the first driving member can drive the backrest to rotate forward and backward relative to the base; A first elastic member, two ends of which are respectively connected to the backrest and the base, and when the clutch is in the disengaged state, the elastic force of the first elastic member is used to drive the backrest to rotate forward to reset.

2. The chassis assembly according to claim 1, characterized in that: The first driving member includes a first motor and a push rod connected to each other, the first motor is fixedly mounted on the backrest, and one end of the push rod away from the first motor is rotatably connected to the base. When the clutch is in the combined state, the first motor is used to drive the push rod to extend and retract so that the backrest rotates relative to the base.

3. The chassis assembly according to claim 2, characterized in that: The backrest is provided with an arc groove, and the chassis assembly comprises a fixing rod, which passes through the arc groove and the base. When the backrest rotates backward, the fixing rod slides relatively in the arc groove.

4. The chassis assembly according to claim 3, characterized in that: The clutch includes a first clamping member and a second driving member, the second driving member is used to drive the first clamping member to connect or disconnect from the backrest, the first clamping member is movably mounted on the fixed rod, when the clutch is in the combined state, the first clamping member is fixedly connected to the backrest, and the push rod is used to push the backrest to rotate around the central axis of the fixed rod.

5. The chassis assembly according to claim 4, characterized in that: The clutch also includes a second elastic member, and the second driving member includes a second motor and a clutch block. The second motor is fixedly mounted on the base, and the clutch block is sleeved on the fixed rod. There are two first clamping members, and the two first clamping members respectively abut against the two ends of the clutch block. The two ends of the second elastic member respectively abut against the first clamping member and the backrest. The second motor is used to drive the clutch block to rotate around the first axis so that the clutch block abuts against the two first clamping members and is fixedly connected to the backrest. The first axis is perpendicular to the central axis of the fixed rod, and the second elastic member is used to drive the first clamping member to separate from the backrest.

6. The chassis assembly according to claim 5, characterized in that: The outer surface of the clutch block is provided with a first abutting area and a second abutting area, the first abutting area is closer to the first axis than the second abutting area, when the clutch is in a disengaged state, the first abutting area abuts the first clamping part, and the first clamping part is disengaged from the backrest, when the clutch is in a combined state, the second abutting area abuts the first clamping part, and the first clamping part is fixedly connected to the backrest.

7. The chassis assembly according to claim 1, characterized in that: The clutch is installed on the backrest, and the first driving member includes a third motor and an output shaft. The output end of the third motor is connected to the output shaft, and the output shaft is rotatably installed on the base. When the clutch is in the combined state, the output shaft is fixedly connected to the backrest, and the third motor is used to drive the output shaft to rotate so that the backrest rotates relative to the base.

8. The chassis assembly according to claim 7, characterized in that: The clutch includes a second clamping member, a sleeve, a third elastic member and a fourth motor. The sleeve is sleeved on the output shaft. The second clamping member has two, and the two second clamping members respectively abut against the two ends of the sleeve. The second clamping member is provided with a third abutting area at one end close to the sleeve. The third abutting area is used to abut against the sleeve. The third abutting area is inclined relative to the central axis of the output shaft. The fourth motor is used to drive the sleeve to rotate around the central axis of the output shaft so that the sleeve abuts against the two second clamping members and is fixedly connected to the first driving member. The two ends of the third elastic member respectively abut against the second clamping member and the first driving member. The third elastic member is used to drive the second clamping member to disengage from the first driving member.

9. The chassis assembly according to claim 1, characterized in that: The chassis assembly also includes a seat cushion, which is arranged above the base. The seat cushion includes a first shell, a second shell and a seat depth adjustment module. The second shell is slidably connected to the first shell. The seat depth adjustment module includes a gear bar and a gear pin that can move relative to the gear bar. The gear bar is provided with a plurality of gear grooves distributed at intervals along the sliding direction of the second shell. The gear bar is installed on the first shell, and the gear pin is installed on the second shell. When the gear pin is placed in any gear groove, the seat depth adjustment module limits the second shell from sliding relative to the first shell.

10. A seat, characterized in that: Comprising a chassis assembly as claimed in any one of claims 1-9.

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