Chassis assembly and seat

Abstract

The utility model 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 utility model relates to chair manufacturing technical field, concretely relates to a chassis subassembly and seat. BACKGROUND

[0002] Nowadays, chair is a kind of equipment used in people's daily life, and comfortable seat backrest is one of people's needs, one of the factors that influence the backrest comfort is the rotatable adjustment of backrest, there is the structure that seat backrest rotating angle can be adjusted in prior art, but the rotating angle of backrest is fixed after being adjusted, and the backrest cannot be flexibly rotated in actual experience, and the experience is poor. SUMMARY

[0003] The utility model aims at solving one of the technical problems in prior art at least, for this purpose, the utility model provides a chassis subassembly, which can actively adjust the backrest angle and automatically adapt the inclination angle according to the force and weight of user leaning back.

[0004] The utility model further provides a seat with the chassis subassembly.

[0005] According to the chassis subassembly of the first aspect embodiment of the utility model, the base, the backrest, the angle adjusting module and the first elastic member are connected, the backrest is rotatably connected to the base, the angle adjusting module includes clutch and first drive, the clutch has disengaged state and joint state, when the clutch is in the disengaged state, the transmission connection between the first drive and the backrest is disconnected, when the clutch is in joint state, the first drive is in transmission connection with the backrest through the clutch, and the first drive can drive the backrest to rotate forward and backward relative to the base. The two ends of the first elastic member are connected with the backrest and the base respectively, 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 and reset.

[0006] The chassis assembly 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, and the angle of the backrest cannot be changed again after adjustment, and the backrest cannot be adaptively attached to the user; the other is a passive adjustment mechanism, that is, the chassis assembly that can be attached to the back of the user is often pulled by rotating the first elastic member to utilize the rebound force of the first elastic member to bring the attachment feeling of the backrest to the user, but this design cannot design an angle adjustment mechanism again, because the rotation of the backrest will conflict with each other, and therefore the comprehensive experience is not very good. The chassis assembly of the embodiment of the utility model, through the structure of the first elastic member, the clutch and the first driving member, the clutch can make the first driving member separate from or combine with the backrest, so that the backrest can be passively adjusted by the rebound force of the first elastic member, and the backrest can be actively adjusted by the first driving member after the clutch is in the combined state, diversified needs are met, and the use experience is improved.

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

[0008] According to some embodiments of the utility model, the backrest is provided with an arc-shaped slot, and the chassis assembly includes a fixing rod, the fixing rod is arranged through the arc-shaped slot and the base, and when the backrest rotates backward, the fixing rod relatively slides in the arc-shaped slot.

[0009] According to some embodiments of the utility model, the clutch includes a first clamping member and a second driving member, the second driving member is used for driving the first clamping member to connect or separate from the backrest, the first clamping member is movably sleeved on the fixing rod, when the clutch is in the combined state, the first clamping member is fixedly connected with the backrest, and the push rod is used for pushing the backrest to rotate with the central axis of the fixing rod as the center.

[0010] According to some embodiments of the utility model, 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, the first clamping member has two, two first clamping members are respectively abutted on both ends of the clutch block, two ends of the second elastic member are respectively abutted on the first clamping member and the backrest, the second motor is used for driving the clutch block to rotate around the first axis, so that the clutch block is fixedly connected with the backrest by abutting two first clamping members, 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.

[0011] According to some embodiments of the utility model, 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 the separated state, the first abutting area abuts the first clamping member, and the first clamping member separates from the backrest, when the clutch is in the combined state, the second abutting area abuts the first clamping member, and the first clamping member is fixedly connected with the backrest.

[0012] According to some embodiments of the utility model, the clutch is installed on the backrest, 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 with the backrest, and the third motor is used for driving the output shaft to rotate, so that the backrest rotates relative to the base.

[0013] According to some embodiments of the utility model, 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, two second clamping members are respectively abutted on both ends of the sleeve, one end of the second clamping member close to the sleeve is provided with a third abutting area, the third abutting area is used for abutting with the sleeve, the third abutting area is inclined relative to the central axis of the output shaft, the fourth motor is used for driving the sleeve to rotate around the central axis of the output shaft, so that the sleeve is fixedly connected with the first driving member by abutting two second clamping members, two ends of the third elastic member are respectively abutted on the second clamping member and the first driving member, and the third elastic member is used to drive the second clamping member to separate from the first driving member.

[0014] According to some embodiments of the utility model, the chassis assembly further includes a seat cushion, the seat cushion 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 movable relative to the gear bar, the gear bar is provided with a plurality of interval distributed gear grooves along the sliding direction of the second shell, the gear bar is installed on the first shell, 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 to slide relative to the first shell.

[0015] According to the seat of the second aspect embodiment of the utility model, the chassis assembly of any one of the first aspect embodiment is included.

[0016] According to the seat of the utility model embodiment, at least has the following beneficial effects: the chassis assembly of the utility model embodiment, through setting up the structure of first elastic part, clutch and first drive part, clutch can make first drive part and backrest separate or joint, therefore backrest can be adjusted passively by the resilience of first elastic part, also can utilize first drive part to adjust backrest actively after clutch is in joint state, satisfies the diversified demand, improves the use experience of the seat including the first aspect embodiment.

[0017] Additional aspects and advantages of the utility model will be partially given in the following description, some will become obvious from the following description, or be understood through the practice of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further explained in combination with the drawings and examples, wherein:

[0019] Figure 1 It is the first perspective drawing of chassis assembly in the first embodiment of the utility model;

[0020] Figure 2 It is the internal structure diagram of base of chassis assembly in the first embodiment of the utility model;

[0021] Figure 3 It is the side view structure schematic diagram of chassis assembly in the first embodiment of the utility model;

[0022] Figure 4 It is the second perspective drawing of chassis assembly in the first embodiment of the utility model;

[0023] Figure 5 It is Figure 4 It is the enlarged view of area A in the middle;

[0024] Figure 6This is a schematic diagram of the clutch structure of the chassis assembly in the first embodiment of the present invention;

[0025] Figure 7 for Figure 6 Enlarged view of region B in the middle;

[0026] Figure 8 This is a schematic diagram of the internal structure of the clutch in the chassis assembly of the first embodiment of the present invention;

[0027] Figure 9 This is a first perspective view of the chassis assembly in the second embodiment of the present utility model;

[0028] Figure 10 This is a second perspective view of the chassis assembly in the second embodiment of the present utility model;

[0029] Figure 11 for Figure 10 Enlarged view of region C in the middle;

[0030] Figure 12 This is an exploded view of the seat cushion of the chassis assembly in the first embodiment of this utility model.

[0031] Reference numerals: Chassis assembly 100, base 101, backrest 102, seat cushion 103, first elastic element 201, third shell 202, fourth shell 203, fifth shell 204, clutch 205, first drive element 301, arc groove 302, fixing rod 303, first shaft 304, second shaft 305, first motor 401, push rod 402, first snap-fit ​​element 501, second drive element 502, second motor 503, clutch block 504, first abutment Zone 701, second abutment zone 702, abutment block 703, lead screw 704, first axis 705, second elastic element 801, third motor 901, sleeve 902, second snap-fit ​​element 903, output shaft 1001, third abutment zone 1101, fourth motor 1102, connecting gear plate 1103, first housing 1201, second housing 1202, gear bar 1203, gear pin 1204, shift block 1205, tension spring 1206, gear groove 1207. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0033] In the description of the utility model, need understanding, relate to the direction description, for example the direction or position relation of indication such as upper, lower, front, back, left, right is based on the direction or position relation shown in drawing, only for the convenience of describing the utility model and simplifying the description, and is not the indication or the implied device or element must have the specific direction, with specific direction structure and operation, therefore can not be understood as the restriction of the utility model.

[0034] In the description of the utility model, the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than and the like are understood as not including the number, above, below, within and the like are understood as including the number.If there is a description to the first, second is only used for distinguishing the purpose of technical features, and can not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0035] In the description of the utility model, unless otherwise explicitly limited, the words such as setting, installation, connection should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the utility model according to the specific content of the technical scheme.

[0036] In the description of the utility model, the description of reference terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the utility model.In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] Reference Figures 1 to 4According to the base assembly 100 of the first aspect embodiment of the utility model, the base 101, the backrest 102, the angle adjusting module and the first elastic piece 201 are arranged, the backrest 102 is rotatably connected to the base 101, the angle adjusting module comprises the clutch 205 and the first driving piece 301, the clutch 205 has the disengaged state and the combined state, when the clutch 205 is in the disengaged state, the transmission connection between the first driving piece 301 and the backrest 102 is disconnected, when the clutch 205 is in the combined state, the first driving piece 301 is in transmission connection with the backrest 102 through the clutch 205, and the first driving piece 301 can drive the backrest 102 to rotate forward and backward relative to the base 101. The two ends of the first elastic piece 201 are connected with the backrest 102 and the base 101 respectively, when the clutch 205 is in the disengaged state, the elastic force of the first elastic piece 201 is used to drive the backrest 102 to rotate forward to reset. One kind in the prior art is an active adjusting mechanism, and the other is a passive adjusting mechanism. The base assembly 100 capable of being attached to the back of the user is usually rotated to pull the first elastic piece 201 by setting the first elastic piece 201 and the like, and the attachment feeling of the backrest 102 to the user is brought by the rebound force of the first elastic piece 201. However, this design cannot design the angle adjusting mechanism again, because the rotation of the backrest 102 by the two will conflict, and therefore the comprehensive experience is not very good. The base assembly 100 of the utility model embodiment is provided with the structure of the first elastic piece 201, the clutch 205 and the first driving piece 301, the clutch 205 can make the first driving piece 301 and the backrest 102 disengage or combine, so that the backrest 102 can be passively adjusted by the rebound force of the first elastic piece 201, and the backrest 102 can be actively adjusted by the first driving piece 301 after the clutch 205 is in the combined state, thereby meeting the diversified needs and improving the use experience.

[0038] It should be noted that the transmission connection is disconnected, that is, when the clutch 205 is in the disengaged state, the backrest 102 will not be driven by the first driving piece 301 even if the first driving piece 301 is running, and at this time the adjustment of the backrest 102 is automatically adjusted by the first elastic piece 201, and the first elastic piece 201 drives the backrest 102 to reset, that is, after the user does not lean on the backrest 102, the backrest 102 will rotate forward, and the process is reset, and because of the reset function, when the user leans on the backrest 102, the first elastic piece 201 drives the backrest 102 to be attached to the back of the user, thereby improving the use experience.

[0039] Reference Figures 3 to 5In some embodiments of the utility model, first driving part 301 includes mutually connected first motor 401 and push rod 402, first motor 401 is fixedly installed on backrest 102, and the end of push rod 402 away from first motor 401 is rotatably connected to base 101, when clutch 205 is in the joint state, first motor 401 is used to drive push rod 402 to retract and expand, thereby making backrest 102 rotate relative to base 101. Specifically, referring to Figure 3 and Figure 4 , push rod 402 is rotatably connected with first shaft 304, base 101 is rotatably connected with backrest 102 through second shaft 305, backrest 102 can rotate relative to base 101 around second shaft 305, and first shaft 304 and second shaft 305 are arranged at intervals, so as to realize the rotation described above. The design of push rod 402 can allow first driving part 301 to be installed inside backrest 102, improve space utilization and aesthetics, first motor 401 is fixedly installed on backrest 102, and push rod 402 is rotatably connected to base 101, so that when push rod 402 retracts and expands, backrest 102 will naturally rotate relative to base 101. It should be noted that, in some embodiments of the utility model, first driving part 301 can also be arranged on base 101 as shown in Figures 8 to 11 , and the rotation of backrest 102 relative to base 101 driven by first driving part 301 can also be achieved by arranging different clutch structures.

[0040] It should be noted that, referring to Figure 2 and Figure 3 , in some embodiments of the utility model, base 101 includes third shell part 202, fourth shell part 203 and fifth shell part 204, third shell part 202 is arranged above fifth shell part 204, both ends of fourth shell part 203 are rotatably connected with third shell part 202 and fifth shell part 204, backrest 102 is rotatably connected with the end of third shell part 202 away from fourth shell part 203, one end of first elastic part 201 is connected with fifth shell part 204, and the other end of first elastic part 201 is connected with fourth shell part 203, when backrest 102 rotates backward, backrest 102 drives third shell part 202 and fourth shell part 203 to rotate, so as to compress first elastic part 201, and the elastic force of first elastic part 201 is used to drive backrest 102 to rotate forward. By arranging multiple shell parts and rotatably connecting adjacent shell parts, the automatic reset of backrest 102 is realized by using the elastic force of first elastic part 201 and the connecting rod structure, and the arrangement position of first elastic part 201 can also be more flexible and diverse, for example Figure 2 , first elastic part 201 can be arranged between third shell part 202 and fifth shell part 204, improving space utilization and aesthetics. It should be noted that, Figure 3Partially perspective view is adopted to reflect the shielded parts of the third shell 202, the fourth shell 203, the backrest 102 and the first elastic member 201, so as to facilitate understanding of the movement principle.

[0041] Reference Figure 3 In some embodiments of the utility model, the backrest 102 is provided with an arc-shaped slot 302, the chassis assembly 100 comprises a fixing rod 303, the fixing rod 303 is arranged through the arc-shaped slot 302 and the base 101, when the backrest 102 rotates backward, the fixing rod 303 relatively slides in the arc-shaped slot 302. The fixing rod 303 is used as the connecting structure when the clutch 205 is in the disengaged state, and the fixing rod 303 is arranged in the arc-shaped slot 302, so that the rotation of the backrest 102 does not interfere with the arrangement of the fixing rod 303, and a fixed track is provided for the rotation of the backrest 102. It should be noted that, referring to Figure 3 The main function of the arc-shaped slot 302 is to provide a fixed track for the rotation of the backrest 102 when the clutch 205 is in the disengaged state, that is, the rotation of the backrest 102 is consistent with the track of the arc-shaped slot 302 at this time, when the clutch 205 is in the engaged state, the first elastic member 201 does not participate in the rotation of the backrest 102, the clutch 205 drives the backrest 102 to rotate, and the rotation track at this time rotates around the central axis of the fixing rod 303, and the specific principle is described in the technical features of the clutch 205 below.

[0042] Reference Figure 2 , Figures 4 to 8 In some embodiments of the utility model, the clutch 205 comprises 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 the backrest 102, the first clamping member 501 is movably sleeved on the fixing rod 303, when the clutch 205 is in the engaged state, the first clamping member 501 is fixedly connected with the backrest 102, and the push rod 402 is used to drive 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 make the first clamping member 501 clamp the backrest 102, so that the clutch 205 is in the 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, so that the rotation of the backrest 102 does not interfere with the clutch 205, when the clutch 205 is in the disengaged state, the backrest 102 is not connected with the clutch 205, so the backrest 102 can slide along the track of the arc-shaped slot 302, at this time, the first elastic member 201 affects the rotation of the backrest 102.

[0043] It should be noted that, referring toFigure 6 And Figure 7 In some embodiments of the utility model, the fixed connection between the first clamping piece 501 and the backrest 102 is achieved through tooth groove engagement, which is more convenient in disengagement and connection. In some embodiments, friction disc or other clamping methods can also be used to achieve fixed connection.

[0044] Reference Figures 4 to 8 In some embodiments of the utility model, the clutch 205 further comprises a second elastic piece 801, the second driving piece 502 comprises 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, the first clamping piece 501 is two, the two first clamping pieces 501 are respectively abutted on both ends of the clutch block 504, the two ends of the second elastic piece 801 are respectively abutted on the first clamping piece 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 on the two first clamping pieces 501 to fixedly connect the backrest 102, the first axis 705 is perpendicular to the central axis of the fixed rod 303, and the second elastic piece 801 is used to drive the first clamping piece 501 to disengage from the backrest 102. Such design can realize the fixed connection of the backrest 102 in two directions by only a single clutch block 504, and the two first clamping pieces 501 can more stably connect the backrest 102 to prevent loosening and facilitate subsequent driving. The second motor 503 is fixedly installed on the base 101, which can make the position of the clutch 205 relatively stable, and the movable clutch block 504 and the first clamping piece 501 are both sleeved on the fixed rod 303. As mentioned above, when the clutch 205 is in the joint state and the backrest 102 is driven by the first driving piece 301, it will rotate around the central axis of the fixed rod 303, so the clutch block 504 and the first clamping piece 501 will not be affected. The second elastic piece 801 can make the first clamping piece 501 automatically disengage and reset when the clutch 205 is in the disengaged state, so as to facilitate the next joint of the clutch 205.

[0045] Reference Figures 6 to 8In some embodiments of the utility model, 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 the first clamping piece 501, and the first clamping piece 501 is disengaged from the backrest 102, when the clutch 205 is in the combined state, the second abutting area 702 abuts the first clamping piece 501, and the first clamping piece 501 is fixedly connected with the backrest 102. The distances of the first abutting area 701 and the second abutting area 702 from the first axis 705 are different, so that when the clutch block 504 rotates, the distance between the first clamping piece 501 and the clutch block 504 also changes, thereby achieving the technical effect of moving the first clamping piece 501 along the axial direction of the fixed rod 303, thereby changing the distance between the first clamping piece 501 and the backrest 102, and connecting or disengaging the first clamping piece 501 from the backrest 102. The action core of the clutch block 504 is to move the two first clamping pieces 501 to the sides by pushing, so the clutch block 504 can also use an oval shape, a long strip shape, etc. in addition to the shape shown in the Figure 8 Further, when the connection between the first clamping piece 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 to change the movement stroke of the first clamping piece 501, so as to adapt to the needs of different connection sizes and tightness.

[0046] Specifically, referring to Figure 7 In some embodiments of the utility model, the rotating mode of the clutch block 504 is to connect the second motor 503 with the clutch block 504 through a lead screw 704 transmission structure, the lead screw 704 is arranged along the axial direction of the fixed rod 303, and the second motor 503 drives the abutting block 703 on the lead screw 704 to reciprocate, so that the two ends of the clutch block 504 reciprocate 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 gear and rack, worm and gear, etc.

[0047] Referring to Figures 9 to 11In some embodiments of the utility model, clutch 205 is installed on backrest 102, first driving part 301 includes third motor 901 and output shaft 1001, the output end of third motor 901 is connected to output shaft 1001, output shaft 1001 is rotatably installed on base 101, when clutch 205 is in the joint state, output shaft 1001 is fixedly connected backrest 102, third motor 901 is used to drive output shaft 1001 to rotate, to make backrest 102 relative base 101 rotate. The structure is the second embodiment of the utility model, in the embodiment, first driving part 301 is installed on base 101, clutch 205 is installed on backrest 102, when clutch 205 is in the joint state, first driving part 301 is connected with backrest 102 through clutch 205, to realize the control of first driving part 301 to backrest 102, such design is more simple in structure, and the first embodiment is installed on backrest 102 in the above-mentioned first embodiment, and the degree of space utilization is higher, can use the structure in any embodiment according to use demand can.

[0048] Reference Figure 10 and Figure 11In some embodiments of the utility model, clutch 205 includes second joint piece 903, sleeve 902, third elastic piece and fourth motor 1102, sleeve 902 is sleeved on output shaft 1001, second joint piece 903 has two, two second joint piece 903 is respectively abutted in both ends of sleeve 902, second joint piece 903 is provided with third abutment area 1101 close to one end of sleeve 902, third abutment area 1101 is used for abutting with sleeve 902, third abutment area 1101 is inclined relative to the central axis of output shaft 1001, fourth motor 1102 is used for driving sleeve 902 rotates around the central axis of output shaft 1001, to make sleeve 902 abut two second joint piece 903 fixed connection first drive 301, the both ends of third elastic piece are respectively abutted second joint piece 903 and first drive 301, third elastic piece is used to drive second joint piece 903 to separate from first drive 301. The clutch 205 structure in the second embodiment is different from the clutch 205 structure of the above-mentioned first embodiment, but the core principle is to use the movement of sleeve 902 (equivalent to the clutch block 504) to drive the second joint piece 903 (equivalent to the first joint piece 501) on both sides to move along the axial direction of the output shaft 1001 (equivalent to the fixed rod 303), so as to realize the disconnection and connection with the first drive 301, the specific principle is that the sleeve 902 rotates around the central axis of the output shaft 1001, and the third abutment area 1101 for abutting with the sleeve 902 is arranged on the second joint piece 903, and the third abutment area 1101 is inclined relative to the central axis of the output shaft 1001, so that the sleeve 902 rotates and changes the distance between the second joint piece 903 and the sleeve 902, thereby realizing the technical effect of moving the second joint piece 903. And the third elastic piece is also used to make the second joint piece 903 automatically separate from the first drive 301 to realize the reset when the clutch 205 is in the disconnection state. It should be noted that, with reference to Figure 11 , the disconnection and connection of the second joint piece 903 and the first drive 301 is through the tooth groove of itself and Figure 11 The connecting tooth disc 1103 in the connecting tooth disc 1103 is fixedly connected to the output shaft 1001, that is, the fourth motor 1102, which is connected to the first drive 301 as a whole.

[0049] With reference to Figure 12In some embodiments of the utility model, the chassis assembly 100 further includes a seat cushion 103, the seat cushion 103 is arranged above the base 101, the seat cushion 103 includes a first shell piece 1201, a second shell piece 1202 and a seat depth adjustment module, the second shell piece 1202 is slidably connected to the first shell piece 1201, the seat depth adjustment module includes a gear bar 1203 and a gear pin 1204 movable relative to the gear bar 1203, the gear bar 1203 is provided with a plurality of interval distributed gear grooves 1207 along the sliding direction of the second shell piece 1202, the gear bar 1203 is installed on the first shell piece 1201, the gear pin 1204 is installed on the second shell piece 1202, when the gear pin 1204 is placed in any gear groove 1207, the seat depth adjustment module limits the second shell piece 1202 to slide relative to the first shell piece 1201.The seat depth adjustment module can make the seat depth of the backrest 102 assembly have a larger adjustment range, adapt to the seat depth needs of different users, improve the applicable scene of the product, specifically by adjusting the second shell piece 1202 to slide relative to the first shell piece 1201, the design of the gear bar 1203, the gear groove 1207 and the gear pin 1204 can make the seat depth adjustment more stable in fixed size, and the structure is simple and does not need to set up motor etc., convenient operation. Figure 12 In some embodiments of the utility model, the gear pin 1204 is separated from the gear groove 1207, and the second shell piece 1202 can slide under the driving of the tension spring 1206, and when sliding to the appropriate position, the gear pin 1204 is inserted into the gear groove 1207, and the movement of the gear pin 1204 can be designed through the knob 1205 and the spring, rotating the knob 1205 makes the gear pin 1204 move along the vertical direction, and the spring is used for resetting the gear pin 1204, which is simple in structure and convenient in operation.

[0050] The seat according to the second aspect of the utility model includes the chassis assembly 100 of any one of the first aspect of the utility model. The chassis assembly 100 of the utility model embodiment is provided with the structure of the first elastic member 201, the clutch 205 and the first driving member 301, the clutch 205 can make the first driving member 301 separate from or combine with the backrest 102, so that the backrest 102 can be passively adjusted by the rebound force of the first elastic member 201, or actively adjusted by the first driving member 301 after the clutch 205 is in the combined state, meeting diversified needs and improving the use experience of the seat including the first aspect of the utility model.

[0051] The utility model embodiment makes the detailed explanation above binding the drawing, but the utility model is not limited to the above -mentioned embodiment, still can make various changes in the knowledge range that the person skilled in the art has possessed without departing from the utility model's tenet premise. Besides, in the case of not conflicting, the embodiment and the feature in the embodiment of the utility model can be combined mutually.

Claims

1. A chassis assembly characterized by, The utility model relates to a chair, which comprises: a base; a backrest pivotally connected to the base; an angle adjustment module comprising a clutch and a first driving member, the clutch having a disengaged state and an engaged state, when the clutch is in the disengaged state, the first driving member is disconnected from the backrest, 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 forward and backward relative to the base; a first elastic member having two ends 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.

2. The chassis assembly of claim 1, wherein, The first driving member comprises 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 pivotally connected to the base, when the clutch is in the engaged state, the first motor is used to drive the push rod to extend or retract so as to make the backrest rotate relative to the base.

3. The chassis assembly of claim 2, wherein, The backrest is provided with an arc-shaped slot, and the chassis assembly comprises a fixing rod penetrating through the arc-shaped slot and the base, when the backrest rotates backward, the fixing rod relatively slides in the arc-shaped slot.

4. The chassis assembly of claim 3, wherein, The clutch comprises a first clamping member and a second driving member, the second driving member is used to drive the first clamping member to connect or disengage the backrest, the first clamping member is movably sleeved on the fixing rod, when the clutch is in the engaged state, the first clamping member is fixedly connected to the backrest, and the push rod is used to push the backrest to rotate about the central axis of the fixing rod.

5. The chassis assembly of claim 4, wherein, The clutch further comprises a second elastic member, the second driving member comprises a second motor and a clutch block, the second motor is fixedly installed on the base, the clutch block is sleeved on the fixing rod, the first clamping member has two, the two first clamping members are respectively abutted at two ends of the clutch block, two ends of the second elastic member are respectively abutted against the first clamping member and the backrest, the second motor is used to drive the clutch block to rotate about a first axis to make the clutch block abut the two first clamping members to fixedly connect the backrest, the first axis is perpendicular to the central axis of the fixing rod, and the second elastic member is used to drive the first clamping member to disengage the backrest.

6. The chassis assembly of claim 5, wherein, An outer surface of the clutch block is provided with a first abutment area and a second abutment area, the first abutment area is closer to the first axis than the second abutment area, when the clutch is in the disengaged state, the first abutment area abuts the first clamping member, and the first clamping member disengages the backrest, when the clutch is in the engaged state, the second abutment area abuts the first clamping member, and the first clamping member is fixedly connected to the backrest.

7. The chassis assembly of claim 1, wherein, The clutch is mounted on the backrest, the first driving member comprises a third motor and an output shaft, the output end of the third motor is connected to the output shaft, the output shaft is rotatably mounted on the base, when the clutch is in the joint state, the output shaft is fixedly connected to the backrest, the third motor is used for driving the output shaft to rotate, so that the backrest rotates relative to the base.

8. The chassis assembly of claim 7, wherein, The clutch comprises 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, two second clamping members are respectively abutted on both ends of the sleeve, the second clamping member is provided with a third abutment area close to one end of the sleeve, the third abutment area is used for abutting with the sleeve, the third abutment area is inclined relative to the central axis of the output shaft, the fourth motor is used for driving the sleeve to rotate around the central axis of the output shaft, so that the sleeve abutting two second clamping members fixedly connects the first driving member, the two ends of the third elastic member are respectively abutted on the second clamping member and the first driving member, the third elastic member is used for driving the second clamping member to separate from the first driving member.

9. The chassis assembly of claim 1, wherein, The base assembly further comprises a seat cushion, the seat cushion is arranged above the base, the seat cushion comprises 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 comprises a gear bar and a gear pin movable relative to the gear bar, the gear bar is provided with a plurality of interval distributed gear grooves along the sliding direction of the second shell, the gear bar is mounted on the first shell, the gear pin is mounted on the second shell, when the gear pin is placed in any gear groove, the seat depth adjustment module limits the second shell to slide relative to the first shell.

10. A seat, characterized by The base assembly comprises the base assembly according to any one of claims 1-9. The base assembly comprises the base assembly according to any one of claims 1-9.

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