Seat

Abstract

The utility model discloses a seat which comprises handrails and a storage rack, the handrails extend along a first direction, the number of the handrails is two, the two handrails are arranged at an interval along a second direction, and the first direction is perpendicular to the second direction; the storage rack is detachably connected with at least one handrail, a connecting mechanism is arranged between the storage rack and the handrail, the connecting mechanism comprises a locking piece and a groove, the locking piece is arranged on the storage rack in a mode of rotating around a first rotating center line, and the groove is formed in the handrail. The first rotation center line extends in the first direction, the locking piece is provided with a locking part, when the storage rack and the handrail are connected with each other, the locking part is inserted into the groove, the locking piece is easy to operate, and the storage rack and the handrail are convenient to connect and detach.

Description

Technical Field

[0001] This utility model relates to a seat. Background Technology

[0002] Most existing seats have limited functionality. Some seats have removable shelves that can be used to place items, thus enriching the seat's functionality. There is usually a locking mechanism between the shelf and the seat to connect them. However, most locking mechanisms are complex in principle and the locking and unlocking operations are cumbersome, which greatly affects the user experience. Utility Model Content

[0003] The purpose of this invention is to provide a new type of seat.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a seat, comprising:

[0005] The handrail extends along a first direction and has two handrails spaced apart along a second direction, wherein the first direction and the second direction are perpendicular to each other;

[0006] A shelf, said shelf being detachably connected to at least one of said armrests.

[0007] A connecting mechanism is provided between the shelf and the armrest. The connecting mechanism includes a locking member rotatably mounted on the shelf about a first rotation center line, and a groove provided on the armrest. The first rotation center line extends along a first direction.

[0008] The locking element has a locking part, which is inserted into the groove when the shelf and the armrest are connected to each other.

[0009] In some embodiments, along the second direction, the shelf is provided with at least one connecting groove, the connecting groove extending along the first direction, and when the shelf and the armrest are connected to each other, the armrest is inserted into the connecting groove; or, at least one armrest is provided with a connecting groove extending along the first direction, and along the second direction, the shelf is provided with an insertion part on at least one side, and when the shelf and the armrest are connected to each other, the insertion part is inserted into the connecting groove.

[0010] In some embodiments, the shelf includes a shelf panel and a connector extending downward from at least one side of the shelf panel and bent along the second direction, wherein a connecting groove is formed between the shelf panel and the connector, and the connecting groove is U-shaped. Preferably, each side of the shelf panel is provided with one connecting groove, and the openings of the two connecting grooves are arranged opposite to each other.

[0011] In some embodiments, a guide structure is provided between the armrest and the connector; the guide structure includes a guide groove disposed at the lower part of the armrest, the opening of the guide groove facing downward and the guide groove extending along the first direction; the connector includes a first connecting portion extending downward from the side of the shelf and a second connecting portion extending downward from the lower part of the first connecting portion along the second direction; the guide structure also includes a protrusion protruding upward from the second connecting portion and into the connecting groove; when the shelf and the armrest are connected to each other, the protrusion is inserted into the guide groove.

[0012] Preferably, the locking member is rotatably disposed at the lower part of the connector, and the groove is disposed at the lower part of the armrest. When the shelf and the armrest are connected to each other, the locking part is inserted upward into the groove. Alternatively, the groove is disposed below the armrest, and when the shelf and the armrest are connected to each other, the locking part is inserted horizontally into the groove. When the locking part is inserted into the groove, the locking part is located on the outside or inside of the connecting groove.

[0013] In some embodiments, the locking member has a first state and a second state. When the shelf and the armrest are connected to each other, the locking member is in the first state. When the locking member is in the second state, the locking portion disengages from the groove. The connecting mechanism further includes an elastic member configured to provide the force required for the locking member to switch to the first state. The locking member also has an operating portion for driving the locking member to switch to the second state. The operating portion and the locking portion are located on opposite sides of the first rotation center line.

[0014] In some embodiments, along the second direction, a locking member is provided on each of the opposite sides of the shelf, and the two locking parts are located between the two operating parts.

[0015] Preferably, the grooves have a plurality of grooves spaced apart along the first direction.

[0016] In some embodiments, the seat further includes:

[0017] The base has guides extending in the vertical direction;

[0018] The seat body has a sitting space for sitting, the armrest is fixed to the seat body, and the seat body has a sliding member that can be slidably connected to the guide member along the length extension direction of the guide member.

[0019] An adjusting member is movably disposed on the seat body. The adjusting member has a pressing part and has an active state that is movable relative to the sliding member and a fixed state that is fixed relative to the sliding member. When the adjusting member is in the fixed state, the pressing part abuts against the guide member, or the pressing part abuts against the sliding member such that at least a portion of the sliding member abuts against the guide member.

[0020] In some embodiments, the seat includes a seat body and a base. The seat body is movably disposed on the base in a vertical direction. The seat body includes a seat and a backrest. In a first direction, the backrest is disposed on one side of the seat. In a second direction, two armrests are disposed on opposite sides of the seat. A sitting space is formed between the seat, the backrest, and the armrests. The seat also includes a footrest, which is movably disposed around the lower part of the seat body. In the first direction, the footrest and the backrest are disposed on opposite sides of the seat. A second rotation center line extends along the second direction. The footrest is configured to fold under the seat, or the footrest is detachably connected to the lower part of the seat body. And / or, the seat also includes a wheel assembly, which is detachably disposed on the lower part of the base.

[0021] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: In the seat of this utility model, the storage rack and the armrest can be connected together by the cooperation between the locking part and the groove. The locking part is rotatably set on the storage rack. By driving the locking part to rotate, the locking part can be disengaged from the groove, thereby the storage rack can be detached from the armrest. The operating principle is simple and the operation is convenient. Attached Figure Description

[0022] Appendix Figure 1 This is a three-dimensional structural diagram of a seat according to a specific embodiment of the present utility model;

[0023] Appendix Figure 2 For the appendix Figure 1 A 3D view after removing the wheel assembly;

[0024] Appendix Figure 3 For the appendix Figure 2 A 3D diagram showing the pedals after they have folded down;

[0025] Appendix Figure 4 For the appendix Figure 3 Side view;

[0026] Appendix Figure 5 For the attached Figure 4 Sectional view along the middle AA direction;

[0027] Appendix Figure 6 For the appendix Figure 5 Enlarged view of point B in the middle;

[0028] Appendix Figure 7 For the appendix Figure 3 A 3D diagram after the shelves have been removed;

[0029] Appendix Figure 8 For the appendix Figure 7 A diagram from another perspective;

[0030] Appendix Figure 9 For the appendix Figure 7 Enlarged view of point C in the middle;

[0031] Appendix Figure 10 This is a partially exploded view of the shelf in this embodiment;

[0032] Appendix Figure 11 For the appendix Figure 10 Enlarged view of point D in the middle;

[0033] Appendix Figure 12 This is a front view of the shelf in this embodiment;

[0034] Appendix Figure 13 For the appendix Figure 12 Enlarged view of point E in the middle;

[0035] Appendix Figure 14 This is a side view of the seat in this embodiment after it has been folded down by sliding the guide and the sliding member;

[0036] Appendix Figure 15 For the attached Figure 7 A sectional view along the FF direction, showing the adjusting element in a fixed state;

[0037] Appendix Figure 16 For the appendix Figure 15 Enlarged view of point G in the middle;

[0038] Appendix Figure 17 Appendix Figure 15 A schematic diagram showing the adjusting component in the active state;

[0039] Appendix Figure 18 For the appendix Figure 17 Enlarged view of point H in the middle;

[0040] The components include: 1. Armrest; 11. Groove; 12. Guide groove; 2. Shelf; 21. Connecting groove; 22. Shelf plate; 23. Connector; 231. First connecting part; 232. Second connecting part; 24. Protrusion; 3. Locking element; 31. Locking part; 32. Operating part; 4. Elastic element; 5. Base; 51. Guide element; 52. Base bracket; 6. Seat body; 60. Seating space; 61. Sliding element; 611. Fitting part; 612. Mounting groove; 62. Seat; 63. Backrest; 64. Support frame; 65. Foot pedal; 7. Adjusting element; 71. Adjusting cam; 711. First cam surface; 712. Second cam surface; 72. Operating handle; 73. Rotating shaft; 8. Wheel assembly. Detailed Implementation

[0041] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments, so that the advantages and features of this utility model can be more easily understood by those skilled in the art. Obviously, the embodiments described in this application are only a part of the embodiments, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application.

[0042] See Figures 1 to 4 The illustrated seat includes armrests 1 and shelves 2. The armrests 1 extend along a first direction and have two shelves spaced apart along a second direction, the first and second directions being perpendicular to each other. The shelves 2 are detachably connected to at least one armrest 1. When the shelves 2 are connected to the armrests 1, items can be placed on the shelves 2. When items are not needed, the shelves 2 can be detached from the armrests 1, providing more seating space and enriching the seat's functionality.

[0043] A connecting mechanism is provided between the shelf 2 and the armrest 1 to achieve the connection between the two. The connecting mechanism includes a locking member 3 rotatably mounted on the shelf 2 about a first rotation center line X1, and a groove 11 provided on the armrest 1. The first rotation center line X1 extends along a first direction. The locking member 3 has a locking part 31. When the shelf 2 and the armrest 1 are connected, see [reference needed]. Figure 5 , Figure 6 As shown, the locking part 31 is inserted into the groove 11. By driving the locking member 3 to rotate around the first rotation center line X1, the locking part 31 is disengaged from the groove 11, and the shelf 2 can be detached from the armrest 1. In this embodiment, the seat is used as a children's high chair. The two sides of the shelf 2 are connected to the two armrests 1 on the left and right sides respectively. When the shelf 2 is fixed to the armrests, the connection stability is higher and the safety is better. That is, a connecting mechanism is provided on both sides of the shelf 2 and the two armrests 1 to realize the connection between the two.

[0044] In other embodiments, the seat, for example as an office chair or lounge chair, may have a shelf 2 detachably connected to a corresponding armrest 1 on one side, with the other side extending toward another armrest on the opposite side, or supported on the armrest 1 on the other side, or a shelf 2 with its middle area detachably connected to one of the armrests 1. That is, a connecting mechanism is provided only on one side or in the middle area of ​​the shelf 2 and on one of the armrests 1.

[0045] In this embodiment, the seat also includes a seat body 6, which has a sitting space 60 for sitting, and armrests 1 are fixed to the seat body 6. Specifically, see Figure 7 , Figure 8 As shown, the seat body 6 includes a seat 62 and a backrest 63. Along the first direction, the backrest 63 is located on one side of the seat 62. Along the second direction, two armrests 1 are located on opposite sides of the seat 62. A sitting space 60 is formed between the seat 62, the backrest 63 and the armrests 1.

[0046] To clearly illustrate the structure of the seat and more clearly describe the relative positions of its components, a coordinate system is established based on the orientation observed by the user while seated, defining directions such as up, down, left, right, front, and back. Specifically, the first direction is the front-back direction, the second direction is the left-right direction, the armrests 1 extend along the front-back direction and are located on the left and right sides of the seat 62, and the backrest 63 is located on the rear side of the seat 62.

[0047] In this embodiment, when the shelf 2 and armrest 1 are connected, the shelf 2, armrest 1, and backrest 63 surround the perimeter of the seating space 60, providing frontal protection for the user sitting on it. In this embodiment, when the shelf 2 and armrest 1 are connected, the seat can be used as a children's high chair, where food, plates, cups, and other items can be placed on the shelf 2. While supporting items, the shelf 2, along with the armrest 1 and backrest 63, provides comprehensive circumferential protection for the child.

[0048] In some embodiments, the shelf 2 is provided with at least one connecting groove 21, which extends along a first direction. When the shelf 2 and the handrail 1 are connected, they are driven to slide relative to each other along the first direction, so that the handrail 1 is inserted into the connecting groove 21. When the shelf 2 and the handrail 1 are connected to each other, the handrail 1 is inserted into the connecting groove 21, which improves the stability of the connection between the shelf 2 and the handrail 1. In this embodiment, along the second direction, a connecting groove 21 is provided on each of the opposite sides of the shelf 2. When the shelf 2 and the handrail 1 are connected to each other, the two handrails 1 on each side are respectively inserted into the two connecting grooves 21. Through the mutual cooperation between the connecting groove 21 and the handrail 1, positioning can be provided for the connection between the shelf 2 and the handrail 1, which is convenient for the two to be connected. At the same time, the cooperation between the connecting groove 21 and the handrail 1 also makes the connection between the shelf 2 and the handrail 1 more stable.

[0049] In other embodiments, at least one armrest 1 is provided with a connecting groove extending in a first direction, and at least one side of the shelf 2 is provided with an insertion part in a second direction. When the shelf 2 and the armrest 1 are connected to each other, the insertion part is inserted into the connecting groove. The cooperation between the insertion part and the connecting groove provides guidance for the connection between the shelf 2 and the armrest 1 and improves the stability of the connection between the two.

[0050] In some embodiments, the shelf 2 includes a shelf 22 and a connector 23 extending downward from at least one side of the shelf 22 and bent in a second direction, wherein a connecting groove 21 is formed between the shelf 22 and the connector 23, and the connecting groove 21 is U-shaped. See also [reference needed] in this embodiment. Figures 10 to 13 As shown, the connector 23 includes two members extending downward from both sides of the shelf 22 and bending towards each other in the second direction, with the openings of the two connecting slots 21 facing each other. This arrangement allows the connecting slots 21 to provide guidance for the relative sliding of the shelf 2 and the armrest 1, improving the accuracy of the connection and simplifying the connection operation. When the two armrests 1 are respectively inserted into the two connecting slots 21, the shelf 2 and the armrest 1 cannot move relative to each other in the vertical direction or the second direction due to the constraints of the shelf 22 and the connector 23. The locking part 31 and the groove 11 further restrict the displacement of the shelf 2 and the armrest 1 in the first direction, thus ensuring a stable connection between the shelf 2 and the armrest 1. In this embodiment, the locking part 3 is only used to restrict the relative displacement of the shelf 2 and the armrest 1 in the first direction, and it does not encounter significant resistance when driving the locking part 3 to the second state.

[0051] In this embodiment, when the shelf 2 and the armrest 1 are connected, the upper part of the armrest 1 abuts against the shelf 22, and the armrest 1 is supported below the shelf 22, thereby improving the stability of the shelf 2 in carrying items. In this embodiment, the two sides of the shelf 22 extend backward, increasing the size of the contact surface between the armrest 1 and the shelf 22, which not only improves the stability of the connection between the shelf 2 and the armrest 1, but also ensures sufficient sitting space 60. In this embodiment, the upper part of the shelf 22 is a stepped shape that is recessed from the periphery to prevent items on the shelf 22 from falling off.

[0052] In this embodiment, the lower part of the shelf 2 is recessed upwards on both the left and right sides, forming a groove. This groove constitutes part of the connecting groove 21. The shape of the groove matches the top of the armrest 1, further improving the stability of the connection between the shelf 2 and the armrest 1. See also... Figure 10 , Figure 11 As shown, along the first direction, the front end of the slot has a groove wall extending in the vertical direction. This groove wall can limit the sliding distance of the armrest 1 relative to the shelf 2. When the end of the armrest 1 abuts against the groove wall, the armrest 1 cannot continue to slide relative to the shelf 2.

[0053] In this embodiment, a guide structure is provided between the armrest 1 and the connector 23 to guide the connection between the armrest 1 and the shelf 2, enabling them to be accurately connected. The guide structure includes a guide groove 12 located at the lower part of the armrest 1 and a protrusion 24 on the connector 23 that protrudes upward. During the connection of the shelf 2 and the armrest 1, the protrusion 24 is inserted into the guide groove 12 and slides along the guide groove 12. Specifically, the opening of the guide groove 12 faces downward and extends along a first direction. The connector 23 includes a first connecting portion 231 extending downward from the side of the shelf 22 and a second connecting portion 232 extending downward from the lower part of the first connecting portion 231 along a second direction. The protrusion 24 protrudes upward from the second connecting portion 232 and into the connecting groove. In this embodiment, the protrusion 24 is strip-shaped and extends along the first direction, which further improves the accuracy of the connection between the shelf 2 and the armrest 1. Meanwhile, the guide groove 12 faces downwards, so when the shelf 2 is removed from the armrest, the outer surface of the armrest 1 is not exposed with any gaps, which improves the user's comfort and reduces the risk of being pinched.

[0054] In other embodiments, a guide groove is provided on the connector 23, and a protrusion that mates with the guide groove is provided on the armrest 1. Similarly, when the shelf 2 and the armrest 1 are connected, the protrusion is slidably inserted into the guide groove to achieve motion guidance. In other embodiments, the guide structure is a guide rail and a guide member that mate with each other, or other existing structures that can achieve motion guidance of the shelf 2 and the armrest 1 along a first direction.

[0055] In this embodiment, the locking member 3 has a first state and a second state. When the shelf 2 and the armrest 1 are connected, the locking member 3 is in the first state. When the locking member 3 is in the second state, the locking part 31 disengages from the groove 11, and in this state, the shelf 2 can be detached from the armrest 1. In this embodiment, the connecting mechanism also includes an elastic member 4, which provides the force required for the locking part 31 to move into the groove 11 and for the locking member 3 to switch to the first state. Specifically, the elastic member 4 is a torsion spring. Under the action of the elastic member 4, the locking member 3 can be maintained in the first state, thereby allowing the shelf 2 and the armrest 1 to remain connected.

[0056] In this embodiment, the locking member 3 also has an operating part 32 for driving itself to switch to the second state. The operating part 32 and the locking part 31 are respectively disposed on opposite sides of the first rotation center line X1. The user can drive the locking part 31 to rotate by rotating the operating part 32, thereby realizing the switching of the locking member 3 between the first state and the second state. In some preferred embodiments, the locking member 3 is disposed on the side of the shelf 2 in the left-right direction, wherein the operating part 32 is located on the side away from the shelf 2, and the locking part 31 is located on the side closer to the shelf 2, so as to facilitate the user to rotate the operating part 32.

[0057] In this embodiment, along the second direction, a locking member 3 is provided on each of the left and right sides of the shelf 2, and a groove 11 is provided on each armrest 1. When connecting the shelf 2 and the armrest 1, the two locking parts 31 on both sides can be inserted into the grooves 11 of the two armrests 1 respectively, improving the stability of the connection. See Figure 12 As shown, the two locking parts 31 are located between the two operating parts 32, which allows the user to operate the two operating parts 32 at the same time. Specifically, the user can switch the two locking parts 3 to the second state by holding the shelf 2 with both hands and driving the two operating parts 32 to rotate at the same time. When the user releases the two operating parts 32, the two locking parts 3 can automatically switch to the first state under the action of the elastic member 4.

[0058] In this embodiment, the locking member 3 is rotatably disposed at the lower part of the connector 23, and the groove 11 is disposed at the lower part of the armrest 1, with the groove opening facing downwards. When the shelf 2 and the armrest 1 are connected, the locking part 31 is inserted upwards into the groove 11. In some embodiments, when the shelf 2 and the armrest 1 are connected, the groove 11 is located on one side of the connecting groove 21, and when the locking part 31 is inserted into the groove 11, the locking part 31 is located on the outer or inner side of the connecting groove 21. The inner side of the connecting groove 21 refers to the space defined by the connecting groove 21, and the outer side of the connecting groove 21 refers to other areas outside the space defined by the connecting groove 21. Specifically, see... Figures 10 to 13As shown, the locking member 3 is rotatably connected to the lower part of the second connecting part 232 about the second rotation center line X2, and is disposed on the outside of the protrusion 24. The groove 11 is disposed on the lower part of the armrest with the slot opening facing downward, and is disposed side by side with the guide groove 12 and on the outside of the guide groove 12. When the locking part 31 is in the locked state, the locking part 31 extends upward and inserts into the groove 11 and blocks the outside of the connecting groove 21. The structure is simple and compact, and the connection is stable. The user can drive the locking part 31 out of the groove 11 by rotating the operating part 32 upward, so that the locking member 3 changes to the second state. In some embodiments, the protrusion 24 may not be provided.

[0059] In other embodiments, the groove 11 may be located in the area below the armrest of the seat, with the groove opening facing left or right. The end of the locking part 31 extends to the left or right in an approximately horizontal direction. When the locking part 31 is in the locked state, it is inserted into the groove 11 and blocks the outside of the connecting groove 21. Alternatively, when the locking part 31 is in the locked state, its end extends upward and is located within the connecting groove 21.

[0060] In this embodiment, the grooves 11 are arranged at intervals along the first direction. By engaging with different grooves 11 using the locking part 31, the position of the shelf 2 relative to the armrest 1 along the first direction can be adjusted, thereby adjusting the size of the sitting space 60 to accommodate different children. Specifically, the shelf 2 can be slid relative to the armrest 1 to different positions, and then the locking part 31 can be released, causing the locking part 31 to insert into different grooves 11, thereby fixing the shelf 2 relative to the armrest 1 in different positions. See also: Figure 10 As shown, each handrail 1 has three grooves 11 spaced apart along the first direction.

[0061] In summary, the connection process of the shelf 2 is as follows: The user holds the shelf 2 with both hands on the left and right sides, and drives the two operating parts 32 on both sides to rotate upwards, causing the two locking parts 3 to switch to the second state, and the locking parts 31 to disengage from the connecting grooves 21. The shelf 2 is driven from front to back relative to the armrest 1, so that the two armrests 1 are respectively inserted into the two connecting grooves 21 on the left and right sides of the shelf 2, and the protrusions 24 are inserted into the guide grooves 12. When the shelf 2 slides relative to the armrest 1 to the desired position, the user releases their hands, causing the two locking parts 3 to automatically switch to the first state under the left and right lower sides of the elastic members 4, and the two locking parts 31 are respectively inserted into the grooves 11 on the two armrests 1, thus realizing the connection between the shelf 2 and the armrest 1. The procedure for removing the shelf 2 from the armrest 1 is as follows: Hold the shelf 2 on both sides with both hands and drive the two operating parts 32 on both sides upward again, so that the two locking parts 3 are converted to the second state. Then drive the shelf 2 forward relative to the armrest 1 to remove the shelf 2. The removal operation is simple.

[0062] In this embodiment, the seat also includes a base 5, and the seat body 6 is movably mounted on the base 5 in the vertical direction, thereby allowing the height of the seat 62 to be adjusted. Specifically, the base 5 has a guide member 51 extending in the vertical direction, and the seat body 6 has a sliding member 61, which is slidably connected to the guide member 51 along the length extension direction of the guide member 51. See also [link to previous embodiment]. Figure 14 As shown, the seat body 6 includes a support frame 64, armrests 1, seat 62 and backrest 63 are all mounted on the support frame 64, and a sliding member 61 is fixed to the rear side of the support frame 64.

[0063] In this embodiment, the seat further includes an adjusting member 7, which is movably disposed on the seat body 6. The adjusting member 7 has a pressing part and has an active state that is movable relative to the sliding member 61, and a fixed state that is fixed relative to the sliding member 61. When the adjusting member 7 is in the fixed state, the pressing part abuts against the guide member 51, or the pressing part abuts against the sliding member 61 such that at least a portion of the sliding member 61 abuts against the guide member 51. In this state, the adjusting member can limit the relative displacement between the seat body 6 and the guide member 51, preventing seat wobbling caused by their relative misalignment.

[0064] In this embodiment, the guide member 51 is a support column extending in the vertical direction, and the base 5 also includes a base bracket 52, which is supported on the ground. The support column is fixedly connected to the base bracket 52 and extends upward from the base bracket 52. In this embodiment, the sliding member 61 is a sliding sleeve slidably fitted on the support column. By driving the sliding sleeve to slide relative to the support column, the two slide and extend along their length. A locking mechanism for locking the two together at multiple height positions and an unlocking mechanism for releasing the locking mechanism are also provided between the sliding member 61 and the guide member 51.

[0065] In this embodiment, the adjusting member 7 is rotatably connected to the outer circumference of the sliding member 61 around the rotating shaft 73, and the axis of the rotating shaft 73 is parallel to the length extension direction of the guide member 51. By rotating the adjusting member 7 around the rotating shaft 73, the adjusting member 7 can be driven to switch between an active state and a fixed state.

[0066] In this embodiment, the adjusting member 7 includes an adjusting cam 71, which is rotatably connected to the sliding member 61 about the rotating shaft 73. The adjusting cam 71 has a first cam surface 711 and a second cam surface 712 that are circumferentially connected. The distance between the first cam surface 711 and the axis of the rotating shaft 73 is greater than the distance between the second cam surface 712 and the axis of the rotating shaft 73. The first cam surface 711 forms a pressing portion. When the adjusting member 7 is in a fixed state, the pressing portion abuts against the guide member 51 or against the sliding member 61 along the length extension direction perpendicular to the guide member 51.

[0067] See Figure 15 , Figure 16 As shown, by driving the adjusting cam 71 to rotate, so that the first cam surface 711 faces the guide member 51, the adjusting member 7 can be converted to a fixed state. At this time, the first cam surface 711 abuts against the guide member 51, or the first cam surface 711 abuts against the slider 61 such that at least a portion of the slider 61 abuts against the guide member 51. A line contact or surface contact is formed between the first cam surface 711 and the guide member 51, or between the slider 61 and the guide member 51, thus forming an interference fit, limiting the relative displacement between the seat body 6 and the base 5 along the length direction perpendicular to the guide member 51, preventing relative wobbling between them. Thus, during daily use, the seat 62 can provide stable load-bearing support, resulting in a better sitting experience for the user. When adjusting the height, the adjusting member 7 can also be converted to a fixed state for adjustment, so that the seat body 6 and the base 5 will not wobble back and forth during the adjustment process, making it more stable. See also Figure 17 , Figure 18 As shown, the adjustment cam 71 is driven to rotate, so that the second cam surface 712 faces the guide member 51. At this time, there is a gap between the second cam surface 712 and the guide member 51 or the sliding member 61. The locking mechanism is released, and the seat body 6 and the base 5 can be driven to slide relative to each other.

[0068] In this embodiment, the adjusting member 7 also includes an operating handle 72 connected to the adjusting cam 71. The operating handle 72 drives the adjusting cam 71 to rotate around the rotating shaft 73, making operation more convenient. When the adjusting member 7 is in a fixed state, the operating handle 72 retracts relative to the sliding member 61, which can prevent accidental contact with the operating handle 72 from causing the adjusting member 7 to switch to a movable state.

[0069] In this embodiment, the slider 61 has a mating portion 611 for engaging with the adjusting cam 71. When the adjusting member 7 is in an active state, there is a gap between the second cam surface 712 and the mating portion 611; when the adjusting member 7 is in a fixed state, the first cam surface 711 abuts against the mating portion 611, causing the mating portion 611 to abut against the guide member 51. Specifically, the sidewall of the slider 61 has a partially thinned portion with reduced wall thickness, and the thinned portion constitutes the mating portion 611. In this embodiment, see [reference needed]. Figure 16 , Figure 18 As shown, by creating a mounting groove 612 on the outer periphery of the slider 61, the wall thickness at the mounting groove 612 is reduced, thereby forming the aforementioned thinned portion. At least a portion of the adjusting cam 71 is accommodated in the mounting groove 612. Due to the smaller thickness of the thinned portion, its elastic deformation performance is better. When the first cam surface 711 abuts against the thinned portion, it can undergo sufficient deformation and can abut tightly against the guide member 51.

[0070] In this embodiment, see Figure 2 , Figure 3 As shown, the seat also includes a footrest 65, which is rotatably disposed at the lower part of the seat body 6 about a second rotation center line X2. Along a first direction, the footrest 65 and the backrest 63 are located on opposite sides of the seat 62. The second rotation center line X2 extends along a second direction, and the footrest 65 can be folded under the seat 62. Specifically, the footrest 65 includes a pedal and a bracket. One end of the bracket is rotatably connected to the front bottom of the support frame 64 about the second rotation center line X2, and the footrest is fixed to the other end of the bracket. In some preferred embodiments, the bracket can be slidably folded along its length, thereby adjusting the height of the footrest to accommodate children of different heights. Simultaneously, when the shelf 2 on the seat is removed, the footrest 65 can be rotated to approach the seat body 6, at which point the seat can be used as a study chair, enriching its functionality. In other embodiments, the footrest 65 can also be detachably connected to the seat body 6, allowing it to be removed from the seat when not needed. The detachable structure can adopt conventional structures such as locking pins and buckles, which will not be described in detail here.

[0071] In this embodiment, see Figure 1 , Figure 2 As shown, the seat also includes a wheel assembly 8, which is detachably disposed on the lower part of the base 5. Specifically, the wheel assembly 8 is detachably disposed on the lower part of the base bracket 52.

[0072] In summary, the seat in this embodiment is equipped with a detachable shelf 2, which is connected to the armrest 1 via a connecting groove 21 and a locking member 3. The connecting groove 21 is U-shaped, which restricts the vertical and horizontal displacement of the shelf 2 and the armrest 1. The locking member 3, in cooperation with the groove 11 on the armrest 1, restricts the forward and backward displacement of the shelf 2 and the armrest 1, making the connection between the shelf 2 and the armrest 1 more stable. When the shelf 2 and the armrest 1 are connected, the armrest 1 is supported under the shelf 22, improving the stability of the shelf 2. A guide structure is provided between the shelf 2 and the armrest 1 to guide the connection and improve the accuracy of the connection. By rotating the operating part 32, the locking member 3 can be driven to switch to the second state. Under the action of the elastic member 4, the locking member 3 can automatically switch to the first state. The operation is simple, and the connection and disassembly of the shelf 2 and the armrest 1 are also convenient. The seat is also equipped with an adjustment component 7. By converting the adjustment component 7 to a fixed state, the stability between the sliding component 61 and the guide component 51 can be improved, and the relative displacement between the two can be avoided, thereby preventing the seat body 6 from shaking and improving the load-bearing stability of the seat.

[0073] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A type of seat, characterized in that: include: The handrail extends along a first direction and has two handrails spaced apart along a second direction, wherein the first direction and the second direction are perpendicular to each other; A shelf, said shelf being detachably connected to at least one of said armrests. A connecting mechanism is provided between the shelf and the armrest. The connecting mechanism includes a locking member rotatably mounted on the shelf about a first rotation center line, and a groove provided on the armrest. The first rotation center line extends along a first direction. The locking element has a locking part, which is inserted into the groove when the shelf and the armrest are connected to each other.

2. The seat according to claim 1, characterized in that: Along the second direction, the shelf is provided with at least one connecting groove, which extends along the first direction. When the shelf and the armrest are connected to each other, the armrest is inserted into the connecting groove. Alternatively, at least one armrest is provided with a connecting groove extending along the first direction. Along the second direction, the shelf is provided with an insertion part on at least one side. When the shelf and the armrest are connected to each other, the insertion part is inserted into the connecting groove.

3. The seat according to claim 2, characterized in that: The shelf includes a shelf panel and a connector extending downward from at least one side edge of the shelf panel and bent along the second direction, wherein the shelf panel and the connector form the connecting groove, which is U-shaped. Each side of the shelf is provided with a connecting groove, and the openings of the two connecting grooves are arranged opposite each other.

4. The seat according to claim 3, characterized in that: A guide structure is provided between the handrail and the connector; The guide structure includes a guide groove disposed at the lower part of the armrest, the opening of the guide groove facing downward and extending along the first direction. The connector includes a first connecting portion extending downward from the side of the shelf and a second connecting portion extending downward from the lower part of the first connecting portion along the second direction. The guide structure also includes a protrusion extending upward from the second connecting portion and into the connecting groove. When the shelf and the armrest are connected to each other, the protrusion is inserted into the guide groove.

5. The seat according to claim 3, characterized in that: The locking member is rotatably disposed at the lower part of the connector, and the groove is disposed at the lower part of the armrest. When the shelf and the armrest are connected to each other, the locking member is inserted upward into the groove. Alternatively, the groove is disposed below the armrest, and when the shelf and the armrest are connected to each other, the locking member is inserted horizontally into the groove. When the locking part is inserted into the groove, the locking part is located on the outside or inside of the connecting groove.

6. The seat according to claim 1, characterized in that: The locking member has a first state and a second state. When the shelf and the armrest are connected, the locking member is in the first state. When the locking member is in the second state, the locking part disengages from the groove. The connecting mechanism further includes an elastic element configured to provide the force required for the locking element to transition to the first state. The locking member also has an operating part for driving the locking member to switch to the second state, and the operating part and the locking part are located on opposite sides of the first rotation center line.

7. The seat according to claim 6, characterized in that: Along the second direction, a locking member is provided on each of the opposite sides of the shelf, and the two locking parts are located between the two operating parts.

8. The seat according to any one of claims 1 to 7, characterized in that: The groove has a plurality of grooves spaced apart along the first direction.

9. The seat according to claim 1, characterized in that: The seat also includes: The base has guides extending in the vertical direction; The seat body has a sitting space for sitting, the armrest is fixed to the seat body, and the seat body has a sliding member that can be slidably connected to the guide member along the length extension direction of the guide member. An adjusting member is movably disposed on the seat body. The adjusting member has a pressing part and has an active state that is movable relative to the sliding member and a fixed state that is fixed relative to the sliding member. When the adjusting member is in the fixed state, the pressing part abuts against the guide member, or the pressing part abuts against the sliding member such that at least a portion of the sliding member abuts against the guide member.

10. The seat according to claim 1, characterized in that: The seat includes a seat body and a base, and the seat body is movably mounted on the base in a vertical direction. The seat body includes a seat and a backrest. Along the first direction, the backrest is located on one side of the seat. Along the second direction, two armrests are located on opposite sides of the seat. A sitting space is formed between the seat, the backrest, and the armrests. The seat also includes a footrest, which is movably disposed at the lower part of the seat body. The footrest is configured to fold under the seat, or the footrest is detachably connected to the lower part of the seat body. And / or, the seat further includes a wheel assembly detachably disposed on the lower part of the base.

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