Chassis assembly of seat and seat

Abstract

The utility model discloses a base plate assembly of a seat and the seat. The base plate assembly of the seat comprises a base, a backrest connecting support and an adjusting mechanism. The backrest connecting bracket is hinged to the base so that the backrest connecting bracket can swing up and down relative to the base around an axis O; the adjusting mechanism comprises a locking block, a shifting rod, a matching part and a driving unit; the matching part is positioned on the backrest connecting bracket, and a plurality of clamping parts are arranged on the matching part and are arranged around an arc line which takes a point on the axis O as a circle center; the driving unit is used for driving the driving lever to move, so that the driving lever drives the locking block to move between a first position close to the matching part and a second position far away from the matching part. The angle of the backrest of the seat can be simply and rapidly adjusted, the overall structure is simple, and stable support can be provided for the backrest.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of seat, concretely relates to a bottom plate subassembly of seat and seat. BACKGROUND

[0002] The conventional seat bottom plate is usually of integral construction, the seat backrest is fixedly matched with the bottom plate, the seat backrest cannot move back and forth to adapt to different sitting postures of the user, the comfort is poor, in order to change the defects of the conventional seat, in some existing office seats and e-sports seats, the bottom plate of the seat usually comprises a base, a backrest connecting support, the backrest connecting support is hinged at the rear side of the base, the seat backrest is installed on the backrest connecting support, so that the backrest can swing back and forth relative to the base, when using, the seat backrest is adjusted to a proper angle, and then the backrest connecting support and the base are locked by using the locking mechanism, the existing locking structure is not efficient in motion conversion and force transmission, and it is difficult to meet the needs of the user for the operation convenience and safety of the seat. SUMMARY

[0003] The utility model aims at providing a bottom plate subassembly of seat and seat, which can improve the operation convenience and safety.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] The bottom plate subassembly of the seat comprises a base, a backrest connecting support and an adjusting mechanism.

[0006] The backrest connecting support is hinged on the base so that the backrest connecting support can swing up and down relative to the base about the axis O; the adjusting mechanism comprises a locking block, a lever, a matching part and a driving unit; the matching part is located on the backrest connecting support and is provided with a plurality of clamping parts, and the plurality of clamping parts are arranged along an arc with a point on the axis O as the center; the lever is linked with the locking block, and the driving unit is used for driving the lever to move, so that the lever drives the locking block to move between a first position close to the matching part and a second position away from the matching part; when the locking block is in the first position, it is combined with one of the clamping parts on the matching part, and when the locking block is in the second position, it is separated from the matching part.

[0007] Preferably, the driving unit comprises a control block connected to the lever, and an elastic reset member located between the control block and the base; the control block moves in a first direction to drive the lever to move the locking block from the first position to the second position; the elastic reset member is used for applying an elastic stress to the control block in a second direction to drive the lever to move the locking block from the second position to the first position; the second direction is opposite to the first direction.

[0008] Preferably, the control block is connected with a pull rod or a pull rope extending to the outside of the base, and the pull rod or the pull rope is used for driving the control block to move in the first direction.

[0009] Preferably, the lever comprises a rotating part, a pushing part located at one side of the rotating part, and a driving end located at the other side of the rotating part, the rotating part is pivotally connected to the base, the pushing part is provided with a sliding groove, and the driving unit is connected to the driving end; the base is provided with a guide groove extending in the front-rear direction, the lock block is provided with a guide column, the guide column is slidably embedded in the guide groove so that the lock block can move relative to the base between the first position and the second position along the extension direction of the guide groove; and the guide column is slidably embedded in the sliding groove of the pushing part so as to link the lock block with the pushing part of the lever.

[0010] Preferably, the guide groove comprises a first blind end located at the front end thereof and a second blind end located at the rear end thereof; when the lock block is in the first position, the guide column is located at the second blind end; and when the lock block is in the second position, the guide column is located at the first blind end.

[0011] Preferably, the base is detachably fixed with a pressing plate, a mounting groove with an open rear end is formed between the pressing plate and the base, the guide groove is arranged on the pressing plate, the lock block is in the form of a plate and is slidably embedded in the mounting groove, the guide column passes through the sliding groove and the guide groove in sequence from top to bottom and is detachably fixed on the lock block, and when the lock block is in the first position, the rear end portion thereof protrudes out of the opening of the mounting groove.

[0012] Preferably, the clamping part is a protruding rib protruding towards the opening of the mounting groove, and when the lock block is in the first position, the portion of the lock block protruding out of the opening of the mounting groove is supported below one of the protruding ribs.

[0013] Preferably, the rotating part is provided with an axle hole, a mounting screw is screwed on the base, the mounting screw is inserted into the axle hole to pivotally connect the rotating part to the base, and the rotating part is limited between the nut of the mounting screw and the base.

[0014] Preferably, the backrest connecting support is provided with a positioning block, the cooperation part is located at the side of the positioning block facing the base, the backrest connecting support is detachably fixed with a pressing seat, and the positioning block is pressed between the pressing seat and the backrest connecting support.

[0015] The seat comprises the above-mentioned seat base assembly.

[0016] Compared with the prior art, the seat has the following beneficial effects:

[0017] The utility model discloses a backrest connecting support is hinged on the base, and the movable lock block on the base combines with the matching part on the backrest connecting support, and the backrest connecting support is supported to ensure that the backrest of the seat can normally support the back of the user, when needing to adjust, the user only needs to operate the drive unit simply, and the lock block and the matching part can be separated to no longer limit the freedom of rotation of the backrest connecting support relative to the base, and the seat backrest angle is adjusted simply and quickly, and the whole structure is relatively simple, and the lock block and the matching part can be matched to provide relatively stable support for the backrest of the seat. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structural schematic diagram of the utility model;

[0019] Figure 2 It is the sectional view of the utility model;

[0020] Figure 3 It is the use state schematic diagram of the utility model;

[0021] Figure 4 It is the working state schematic diagram of the adjusting mechanism of the utility model;

[0022] Figure 5 It is the working state schematic diagram of the adjusting mechanism of the utility model;

[0023] Figure 6 It is Figure 1 The structure schematic diagram of the middle lever.

[0024] Wherein: 10, base;20, backrest connecting support;21, positioning block;22, convex rib;23, pressing seat;30, lock block;31, guide column;40, lever;41, rotating part;411, shaft hole;42, pushing part;421, sliding groove;43, driving end;44, mounting screw;51, control block;52, spring;60, pressing plate;61, guide groove;611, first blind end;612, second blind end. DETAILED DESCRIPTION

[0025] In the following, the utility model is further described by combining with the drawings and specific embodiments, and it needs to be explained that the following described embodiments or the technical features between each embodiment can be combined to form new embodiments on the premise of not conflicting. Except the special explanation, the materials and equipment adopted in the embodiment can be purchased from the market. The examples of the embodiment are shown in the drawings, wherein the same or similar signs represent the same or similar elements or the elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, and are only used to explain the application, and cannot be understood as the limitation of the application.

[0026] In the description of the present application, it needs to be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically specified and limited.

[0027] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "connected", "communicated", "connected" should be understood in a broad sense, for example, it can be fixedly connected, it can be connected through an intermediate medium, it can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] As Figure 1 , 2 , 3, 4, 5, 6, is a kind of chassis assembly of seat of the utility model, it includes base 10, backrest connecting support 20, adjusting mechanism, backrest connecting support 20 is located at the rear side of base 10, the cushion of seat is installed on base 10, the backrest of seat is installed on backrest connecting support 20, backrest connecting support 20 is hinged with base 10 to make backrest connecting support 20 can swing up and down relative to base 10 about axis O, thereby, make the backrest located behind the cushion can swing relative to the cushion;Adjusting mechanism includes lock block 30, lever 40, cooperation part and drive unit, cooperation part is located on backrest connecting support 20, a plurality of ribs 22 are provided on cooperation part, rib 22 extends from backrest connecting support 20 towards base 10, a plurality of ribs 22 are arranged along an arc, and the center of the arc falls on axis O;Lever 40 is linked with lock block 30, drive unit is used to drive lever 40 to move, so that lever 40 can drive lock block 30 to move between the first position close to cooperation part and the second position away from cooperation part, when lever 40 drives lock block 30 to the first position, lock block 30 is located below one of the ribs 22, lock block 30 is used to cooperate with the rib 22 to limit the freedom of rib 22 to swing downward, in turn limit backrest connecting support 20 to swing downward relative to base 10, when lever 40 drives lock block 30 to the second position, lock block 30 is separated from cooperation part, that is, lock block 30 will not be combined with any one of rib 22, at this time, backrest connecting support 20 can swing downward or upward relative to base 10, at this time, backrest connecting support 20 can be adjusted up and down relative to base 10.

[0029] When the seat is in use, the locking block 30 is in the first position, the locking block 30 is combined with one of the protrusions 22, and the freedom of the backrest connecting bracket 20 to swing downward relative to the base 10 is limited, so that the backrest of the seat can provide stable support for the back of the user; when the angle of the seat backrest needs to be adjusted, the user operates the driving unit to drive the driving unit to move the lever 40, and the lever 40 moves the locking block 30 from the first position to the second position, and the locking block 30 is separated from the matching part, that is, it is not combined with any one of the protrusions 22, at this time the backrest connecting bracket 20 can be freely rotated relative to the base 10 around the axis O, so that the front and rear swing angle of the seat backrest can be adjusted at will, and when the adjustment is completed, the driving unit is used to drive the lever 40 to move, so that the lever 40 moves the locking block 30 from the second position to the first position, and the locking block 30 is combined with the corresponding protrusion 22 on the backrest connecting bracket 20, and the locking block 30 and the protrusion 22 are matched to limit the freedom of the backrest connecting bracket 20 to swing downward relative to the base 10, so as to ensure that the backrest can normally support the back of the user after adjustment.

[0030] In the utility model, the backrest connecting bracket 20 is hinged on the base 10, and the movable locking block 30 on the base 10 is combined with the matching part on the backrest connecting bracket 20 to provide support for the backrest connecting bracket 20, so that the backrest of the seat can normally support the back of the user, when adjustment is needed, the user only needs to simply operate the driving unit, so that the locking block 30 is separated from the matching part and no longer limits the freedom of the backrest connecting bracket 20 to rotate relative to the base 10, and the adjustment of the angle of the seat backrest is simply and quickly completed, and the overall structure is relatively simple, and the locking block 30 and the matching part can be matched to provide relatively stable support for the backrest of the seat.

[0031] In the above embodiment, when the locking block 30 is in the first position, the protrusion 22 serves as a detent part and is combined with the locking block 30 to limit the backrest connecting bracket 20, and when the user uses the seat, the backward pressure applied by the user to the seat backrest is transmitted to the locking block 30 through the protrusion 22 and then transmitted to the base 10 through the locking block 30. In other embodiments, the detent part provided on the matching part can also be a clamping groove, and when the locking block 30 is in the first position, the locking block 30 is inserted into the clamping groove to combine the locking block 30 with the clamping groove, or a clamping groove is provided on the locking block 30, and when the locking block 30 moves to the first position, the protrusion 22 on the matching part is clamped into the clamping groove on the locking block 30.

[0032] The driving unit comprises a control block 51 connected to the lever 40 and a spring 52 located between the control block 51 and the base 10, wherein the control block 51 moves in the first direction A to drive the lever 40 to move, so that the lever 40 can drive the lock block 30 to move from the first position to the second position, and the spring 52 serves as an elastic reset member for applying an elastic stress in the second direction B to the control block 51, so as to push the lever 40 to move in the second direction B, so that the lever 40 can drive the lock block 30 to move from the second position to the first position. When it is necessary to adjust the angle of the seat backrest, the user operates the control block 51 to move in the first direction A, and the lever 40 drives the lock block 30 to the second position. After the angle of the seat backrest is adjusted, the external force applied to the control block 51 is released, and the spring 52 is used to reset the control block 51, i.e. the spring 52 is used to push the lever 40 to move in the second direction B, and the lever 40 drives the lock block 30 to the first position. In other embodiments, the spring 52 can be replaced by some elastic reset members such as elastic rubber blocks and tension springs. When it is necessary to adjust the angle of the seat backrest, the user only needs to pull the control block 51 to separate the lock block 30 from the matching part, and then releases the external force applied to the control block 51. In order to further facilitate the operation, the control block 51 is connected with a pull rod or a pull rope extending to the outside of the base 10, and the pull rod or the pull rope is used to drive the control block 51 to move in the first direction A.

[0033] The lever 40 comprises a rotating part 41, a driving part 42 and a driving end 43, the driving part 42 is located on one side of the rotating part 41, and the driving end 43 is located on the other side of the rotating part 41. The rotating part 41 is pivotally connected to the base 10, and the driving part 42 is provided with a sliding groove 421. The driving unit is connected to the driving end 43, and the control block 51 described above can be fixed to the driving end 43. The base 10 is provided with a guide groove 61 extending in the front-rear direction, and the lock block 30 is provided with a guide column 31 slidingly embedded in the guide groove 61, so that the lock block 30 can move relative to the base 10 along the extension direction of the guide groove 61 between the first position and the second position. Meanwhile, the guide column 31 is slidingly embedded in the sliding groove 421 of the driving part 42, so that the lock block 30 is connected with the driving part 42 of the lever 40 through the guide column 31 and the sliding groove 421. Figure 4 and Figure 5As shown, when the driving unit drives the driving end 43 of the driving rod 40 to move in the first direction A, the rotating part 41 rotates counterclockwise, and the driving part 42 swings forward, and the guide column 31 is driven forward along the guide groove 61, and the lock block 30 moves forward until the lock block 30 moves to the second position; when the driving unit drives the driving end 43 of the driving rod 40 to move in the second direction B, the rotating part 41 rotates clockwise, and the driving part 42 swings backward, and the guide column 31 is driven backward along the guide groove 61, and the lock block 30 moves backward until the lock block 30 moves to the first position. In the process of the driving rod 40 driving the guide column 31, the guide column 31 slides along the guide groove 61 while sliding in the sliding groove 421. The guide groove 61 includes a first blind end 611 at the front end thereof and a second blind end 612 at the rear end thereof. When the lock block 30 is in the first position, the guide column 31 is located at the second blind end 612 of the guide groove 61, and when the lock block 30 is in the second position, the guide column 31 is located at the first blind end 611 of the guide groove 61. In this way, the two ends of the guide groove 61 are used to limit the guide column 31, so as to limit the maximum range of the forward and backward movement of the lock block 30. At the same time, the first blind end 611 and the second blind end 612 are used to position the lock block 30, so as to prevent the lock block 30 from being excessively displaced during the forward and backward movement.

[0034] In order to facilitate the installation of the lock block 30 and the base 10, and at the same time ensure that the lock block 30 can provide stable support force for the convex ribs 22 when combined with the convex ribs 22, a pressing plate 60 is detachably fixed on the base 10. The pressing plate 60 can be fixed on the base 10 by screws, and an installation groove with an open rear end is formed between the pressing plate 60 and the base 10, that is, the opening of the rear end of the installation groove faces the matching part on the backrest connecting support 20. The guide groove 61 is arranged on the pressing plate 60, the lock block 30 is in the form of a plate and is slidably embedded in the installation groove, and the guide column 31 passes through the sliding groove 421 and the guide groove 61 in sequence from top to bottom and is detachably fixed on the lock block 30. Specifically, the guide column 31 can be a screw fixed on the lock block 30, or other columnar structures detachably fixed on the lock block 30. When the lock block 30 is in the first position, the rear end of the lock block 30 protrudes from the opening of the rear end of the installation groove, and the part of the lock block 30 protruding from the installation groove can be below one of the convex ribs 22, so as to provide support for the convex rib 22. When the seat is used, the back of the user applies a backward pressure to the backrest of the seat, and the pressure is transmitted to the backrest connecting support 20, and then transmitted to the pressing plate 60 through the convex rib 22 and the lock block 30. Since the pressing plate 60 is detachably fixed on the base 10, the height of the installation groove between the pressing plate 60 and the base 10 can be adjusted to be equivalent to the thickness of the lock block 30, so that there is a small gap between the lock block 30 and the pressing plate 60, which reduces the swinging amplitude of the lock block 30 when pressed downward by the convex rib 22 as much as possible, and the lock block 30 can stably provide support for the convex rib 22.

[0035] It should be noted that in other embodiments, the guide groove 61 for guiding the sliding of the lock block 30 between the first position and the second position is not necessarily front-rear extending, but can also be at an angle with the front-rear direction, as long as the lock block 30 can be combined with the convex ribs 22 when the lock block 30 slides along the guide groove 61 to the first position, and the lock block 30 can be separated from the matching part when the lock block 30 slides along the guide groove 61 to the second position. The push rod 40 is not necessarily in the above-mentioned swinging manner to push the guide column 31, but can also be in a linear motion to push the guide column 31.

[0036] The rotating part 41 is provided with an axis hole 411, and the base 10 is screwed with a mounting screw 44, the mounting screw 44 is inserted into the axis hole 411, and the rotating part 41 is pivoted on the base 10, and the rotating part 41 is limited between the nut of the mounting screw 44 and the base 10, so as to prevent the push rod 40 from being separated from the base 10. The push rod 40 can be a metal strip bent to form, or a plastic or metal part processed by a mold.

[0037] In other embodiments, the backrest connecting bracket 20 is provided with a positioning block 21, and the matching part is located on the side of the positioning block 21 facing the base 10, that is, the plurality of convex ribs 22 are arranged on the side of the positioning block 21 facing the base 10, and the backrest connecting bracket 20 is detachably fixed with a pressing seat 23, and the positioning block 21 is clamped between the pressing seat 23 and the backrest connecting bracket 20. After the seat is used for a long time, the convex ribs 22 on the positioning block 21 are worn and the stability of the cooperation between the convex ribs 22 and the lock block 30 is affected, the pressing seat 23 can be detached from the backrest connecting bracket 20, and a new positioning block 21 can be replaced.

[0038] The seat of the utility model, including above-mentioned seat's chassis subassembly, other structure of seat with prior art is same, here does not make detailed explanation.

[0039] Finally, it should be noted that: the above-mentioned embodiments are only optional embodiment modes of the utility model, which cannot be used to limit the scope of protection of the utility model, and any non-substantial change and replacement made by the person skilled in the art on the basis of the utility model belongs to the scope of protection required by the utility model.

Claims

1. A chassis assembly for a seat, characterized by, The base, the backrest connecting support and the adjusting mechanism are provided. The backrest connecting support is hinged to the base so as to be able to swing up and down about the axis O relative to the base; the adjusting mechanism comprises a locking block, a lever, a matching part and a driving unit. The matching part is located on the backrest connecting support and is provided with a plurality of clamping parts arranged along an arc with a point on the axis O as the center; the lever is linked with the locking block; the driving unit is used to drive the lever to move so as to drive the locking block to move between a first position close to the matching part and a second position away from the matching part; when the locking block is in the first position, it is combined with one of the clamping parts on the matching part; when the locking block is in the second position, it is separated from the matching part.

2. The seat pan assembly of claim 1, wherein, The driving unit comprises a control block connected to the lever, and an elastic reset member located between the control block and the base; the control block moves in a first direction to drive the lever to move the locking block from the first position to the second position; the elastic reset member is used to apply an elastic stress to the control block in a second direction opposite to the first direction to drive the lever to move the locking block from the second position to the first position.

3. The seat pan assembly of claim 2, wherein, The control block is connected with a pull rod or a pull rope extending to the outside of the base, which is used to drive the control block to move in the first direction.

4. The seat pan assembly of claim 1, wherein, The lever comprises a rotating part, a pushing part located on one side of the rotating part, and a driving end located on the other side of the rotating part; the rotating part is pivoted to the base; the pushing part is provided with a sliding groove; the driving unit is connected to the driving end; the base is provided with a guide groove extending in the front-back direction; the locking block is provided with a guide column; the guide column is slidingly embedded in the guide groove so that the locking block can move relative to the base along the extension direction of the guide groove between the first position and the second position; the guide column is slidingly embedded in the sliding groove of the pushing part to link the locking block with the pushing part of the lever.

5. The seat pan assembly of claim 4, wherein, The guide groove comprises a first blind end at the front end and a second blind end at the rear end; when the locking block is in the first position, the guide column is located at the second blind end; when the locking block is in the second position, the guide column is located at the first blind end.

6. The seat pan assembly of claim 4, wherein, The base is detachably fixed with a pressing plate, and a mounting groove with an open rear end is formed between the pressing plate and the base; the guide groove is provided on the pressing plate; the locking block is in the form of a plate and is slidingly embedded in the mounting groove; the guide column passes through the sliding groove and the guide groove in sequence from top to bottom and is detachably fixed on the locking block; when the locking block is in the first position, the rear end thereof protrudes out of the opening of the mounting groove.

7. The seat pan assembly of claim 6, wherein, The clamping part is a protruding rib protruding towards the opening of the mounting groove; when the locking block is in the first position, the part of the locking block protruding out of the opening of the mounting groove is supported below one of the protruding ribs.

8. The seat pan assembly of claim 4, wherein, The rotating part is provided with an axle hole; the base is screwed with a mounting screw; the mounting screw is inserted into the axle hole to pivot the rotating part to the base; the rotating part is limited between the nut of the mounting screw and the base.

9. The seat pan assembly of claim 1, wherein, The backrest connecting support is provided with a positioning block; the matching part is located on the side of the positioning block facing the base; the backrest connecting support is detachably fixed with a pressing seat; the positioning block is pressed between the pressing seat and the backrest connecting support.

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

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