Lifting office chair with silent castor

Abstract

The utility model discloses a lift office chair with mute universal wheel relates to office chair technical field, and this scheme includes lift pole, and the bottom fixed connection of lift pole has five star frame, and the end of five star frame is installed with mute universal wheel, and the outside surface of mute universal wheel is installed with cleaning mechanism, and the top fixed connection of lift pole has seat frame, and the both ends of seat frame all are installed with folding frame, the utility model discloses through setting up folding frame, makes the folding storage of back cushion and handrail pad, both reduce the space occupation when not using, and can avoid the exposure of cushion, back cushion and dust, through the cleaning mechanism of mute universal wheel outside installation can clean the plastic debris, metal debris and so on sundries when seat movement, avoid sundries damage universal wheel or influence the smoothness of movement, prolong the service life of universal wheel, improve the use comfort.

Description

Technical Field

[0001] This utility model relates to the field of office chair technology, specifically a height-adjustable office chair with silent universal wheels. Background Technology

[0002] Office chairs refer to various chairs provided for convenience in daily work and social activities. In a narrow sense, office chairs refer to backrest chairs used for desk work in a seated position. In a broad sense, office chairs refer to all chairs used in offices. According to a search, Chinese patent publication number CN223054147U discloses an office chair, including a fixed seat frame and armrest assembly. The fixed seat frame includes a left arm, a right arm, and a supporting base plate. The fixed seat frame is generally U-shaped. The left and right side arms are tubular structures with open lower ends. The armrest assembly includes armrest plates and supporting arms. The armrest plates are fixed to the upper ends of the supporting arms and provide lateral support. The supporting arms are height-adjustable and fixed within the tubular structures of the left and right side arms.

[0003] The above technical solution uses a fixed frame to connect the armrests, seat, and backrest. Although the overall installation structure is simple and compact, the backrest and armrests cannot be folded for storage when in use. This makes it easy to occupy a lot of space when not in use and allow dust to accumulate on the seat and backrest. Furthermore, during movement, plastic and metal debris, such as pen caps, paper clips, or thumbtacks, often accumulate on the office floor. This not only affects the movement of the office chair but also damages the casters at the bottom of the chair. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a height-adjustable office chair with silent universal wheels, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a height-adjustable office chair with silent universal wheels, comprising a lifting rod, a five-star frame fixedly connected to the bottom end of the lifting rod, silent universal wheels installed at the ends of the five-star frame, a cleaning mechanism installed on the outer surface of the silent universal wheels, a seat frame fixedly connected to the top end of the lifting rod, folding frames installed at both ends of the seat frame, a seat cushion installed on the seat frame, and backrest cushions and armrest cushions installed on the folding frames;

[0006] The cleaning mechanism includes a connecting frame fixedly connected to both sides of the silent universal wheel housing, a connecting plate slidably connected inside the connecting frame, a mounting plate fixedly connected to the bottom of the connecting plate, and a cleaning brush adhered to the bottom of the mounting plate.

[0007] Preferably, a spring is fixedly connected inside the connecting frame, and the bottom end of the spring is fixedly connected to the top end of the connecting plate. The spring can provide a pre-tightening force to the cleaning brush, so that the cleaning brush can make stable contact with the ground and improve the cleaning effect.

[0008] Preferably, the folding frame includes a connecting frame fixedly connected to both ends of one side of the seat frame. The connecting frame has a support frame rotatably connected inside via a pivot. The cushion is installed on the support frame, which not only allows for adjustment of the cushion's angle but also allows it to be folded and stored when not in use, preventing dust from settling on it.

[0009] Preferably, a connecting sleeve is fixedly connected to one side of the support frame, and a handrail frame is rotatably connected inside the connecting sleeve. The handrail pad is installed on the handrail frame, which not only changes the angle of the handrail pad but also facilitates its storage.

[0010] Preferably, a first pin is inserted through the outer surface of the connecting frame, and a plurality of first positioning holes that cooperate with the first pin are opened on the outer surface of the support frame, so as to facilitate fixing the angle of the cushion.

[0011] Preferably, a second pin is inserted through the outer surface of the connecting sleeve, and a plurality of second positioning holes that cooperate with the second pin are provided on the outer surface of the handrail frame to facilitate fixing the angle of the handrail pad.

[0012] This utility model provides a height-adjustable office chair with silent universal wheels. It has the following beneficial effects:

[0013] This type of height-adjustable office chair with silent omnidirectional wheels has beneficial effects.

[0014] This height-adjustable office chair with silent casters features a folding frame that allows the backrest and armrests to be folded and stored away, reducing space usage when not in use and preventing dust accumulation. The angles of the backrest and armrests can be adjusted using pins and positioning holes to suit different users' needs. The cleaning mechanism on the outside of the silent casters, with its spring-loaded preload, keeps the cleaning brush firmly in contact with the ground, effectively cleaning plastic and metal debris as the chair moves. This prevents damage to the casters or impede smooth movement, extending their lifespan and improving user comfort. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model from another angle;

[0017] Figure 3This is a structural schematic diagram of the silent universal wheel and cleaning mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the cleaning mechanism of this utility model.

[0019] In the diagram, 1. Lifting rod; 2. Five-star frame; 3. Silent caster wheels; 4. Seat frame; 5. Seat cushion; 6. Backrest cushion; 7. Armrest pad; 8. Connecting frame; 9. Connecting plate; 10. Mounting plate; 11. Cleaning brush; 12. Spring; 13. Connecting frame; 14. Support frame; 15. Connecting sleeve; 16. Armrest frame. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example:

[0022] like Figure 1 , Figure 3 and Figure 4 As shown, a height-adjustable office chair with silent omnidirectional wheels includes a height-adjustable rod 1, a five-star frame 2 fixedly connected to the bottom end of the height-adjustable rod 1, silent omnidirectional wheels 3 installed at the ends of the five-star frame 2, a cleaning mechanism installed on the outer surface of the silent omnidirectional wheels 3, the cleaning mechanism including a connecting frame 8 fixedly connected to both sides of the outer shell of the silent omnidirectional wheels 3, a connecting plate 9 slidably connected inside the connecting frame 8, an mounting plate 10 fixedly connected to the bottom of the connecting plate 9, and a cleaning brush 11 glued to the bottom of the mounting plate 10.

[0023] During the movement of the office chair, the cleaning brush 11 can clean the floor that the silent universal wheel 3 is about to pass over, preventing hard particles and debris from coming into contact with the silent universal wheel 3, causing damage or affecting normal movement, thus improving service life and comfort.

[0024] Furthermore, a spring 12 is fixedly connected inside the connecting frame 8. The bottom end of the spring 12 is fixedly connected to the top end of the connecting plate 9. The spring 12 can provide pre-tightening force to the sweeping brush 11, so that the sweeping brush 11 can stably contact the ground and improve the sweeping effect.

[0025] It should be noted that the lifting rod 1 in this technical solution is common knowledge in this technical field and belongs to the prior art, so it is not described in detail. For details, please refer to the existing lifting office chairs.

[0026] like Figure 1 and Figure 2 As shown, a seat frame 4 is fixedly connected to the top of the lifting rod 1. Folding frames are installed at both ends of the seat frame 4. A seat cushion 5 is installed on the seat frame 4. A backrest cushion 6 and an armrest cushion 7 are installed on the folding frame. The folding frame includes a connecting frame 13 fixedly connected to both ends of one side of the seat frame 4. A support frame 14 is rotatably connected inside the connecting frame 13 via a rotating shaft. The backrest cushion 6 is installed on the support frame 14.

[0027] When not in use, the support frame 14 can be rotated so that the back cushion 6 covers the seat cushion 5. This not only allows the seat cushion 5 and back cushion 6 to be folded and stored, reducing space occupation, but also prevents them from being exposed to the outside and getting dusty.

[0028] Furthermore, a first pin is inserted through the outer surface of the connecting frame 13, and a plurality of first positioning holes that cooperate with the first pin are opened on the outer surface of the support frame 14. By inserting the first pin into the corresponding first positioning hole, the angle of the backrest 6 can be adjusted, making it convenient for users with different habits to use.

[0029] A connecting sleeve 15 is fixedly connected to one side of the support frame 14. A handrail frame 16 is rotatably connected inside the connecting sleeve 15, and a handrail pad 7 is installed on the handrail frame 16. A second pin is inserted through the outer surface of the connecting sleeve 15, and a plurality of second positioning holes that cooperate with the second pin are opened on the outer surface of the handrail frame 16.

[0030] When in use, the angles of the armrest frame 16 and the armrest pad 7 can be adjusted by inserting the second positioning pin into the corresponding second positioning hole, which is convenient for both adjustment and storage.

[0031] It should be noted that fixing the angle through the cooperation of the positioning pin and the positioning hole is only one means in this technical solution. Other methods can also be used for fixing, such as elastic pins or others, which are common fixing techniques in this technical field and belong to the prior art.

[0032] Working principle: The office chair is height-adjustable via a lifting rod 1. The five-star frame 2 at the bottom of the lifting rod 1 provides mounting support for the silent casters 3. The silent casters 3 move the chair flexibly. During movement, the springs 12 inside the connecting frames 8 on both sides of the shell of the silent casters 3 push the connecting plate 9 downward, so that the cleaning brush 11 at the bottom of the mounting plate 10 makes close contact with the ground, simultaneously cleaning debris on the ground. The seat frame 4 at the top of the lifting rod 1 carries the seat cushion 5. The connecting frames 13 on both sides of the seat frame 4 are rotatably connected to the support frame 14 via a pivot. By inserting the first pin into the corresponding first positioning hole on the support frame 14, the use angle of the backrest 6 can be fixed. When not in use, rotating the support frame 14 allows the backrest 6 to cover the seat cushion 5 for storage. The connecting sleeve 15 on one side of the support frame 14 is rotatably connected to the armrest frame 16. By inserting the second pin into the corresponding second positioning hole on the armrest frame 16, the angle of the armrest pad 7 can be adjusted. When not in use, the armrest frame 16 can also be folded to reduce space occupation.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A height-adjustable office chair with silent universal wheels, comprising a height-adjustable rod (1), characterized in that: The bottom end of the lifting rod (1) is fixedly connected to a five-star frame (2), the end of the five-star frame (2) is equipped with a silent universal wheel (3), the outer surface of the silent universal wheel (3) is equipped with a cleaning mechanism, the top end of the lifting rod (1) is fixedly connected to a seat frame (4), both ends of the seat frame (4) are equipped with folding frames, a seat cushion (5) is installed on the seat frame (4), and a backrest cushion (6) and an armrest cushion (7) are installed on the folding frame. The cleaning mechanism includes a connecting frame (8) fixedly connected to both sides of the housing of the silent universal wheel (3). A connecting plate (9) is slidably connected inside the connecting frame (8). An mounting plate (10) is fixedly connected to the bottom of the connecting plate (9). A cleaning brush (11) is glued to the bottom of the mounting plate (10).

2. The height-adjustable office chair with silent universal wheels according to claim 1, characterized in that: A spring (12) is fixedly connected inside the connecting frame (8), and the bottom end of the spring (12) is fixedly connected to the top end of the connecting plate (9).

3. The height-adjustable office chair with silent universal wheels according to claim 1, characterized in that: The folding frame includes a connecting frame (13) fixedly connected to both ends of one side of the seat frame (4). The connecting frame (13) is rotatably connected to a support frame (14) via a rotating shaft. The cushion (6) is installed on the support frame (14).

4. The height-adjustable office chair with silent universal wheels according to claim 3, characterized in that: A connecting sleeve (15) is fixedly connected to one side of the support frame (14), and a handrail frame (16) is rotatably connected inside the connecting sleeve (15). The handrail pad (7) is installed on the handrail frame (16).

5. The height-adjustable office chair with silent universal wheels according to claim 3, characterized in that: The outer surface of the connecting frame (13) is through-inserted with a first pin, and the outer surface of the support frame (14) is provided with a plurality of first positioning holes that cooperate with the first pin.

6. The height-adjustable office chair with silent universal wheels according to claim 4, characterized in that: The outer surface of the connecting sleeve (15) is through-inserted with a second pin, and the outer surface of the handrail frame (16) is provided with a plurality of second positioning holes that cooperate with the second pin.

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