Brake caster

Abstract

A caster for sitting and braking is suitable for people sitting furniture such as chairs and sofas, and comprises a fixed part fixed on a furniture leg of the people sitting furniture, a movable part capable of vertically moving relative to the fixed part, and a pressure spring. When no person sits on the furniture (namely no load), the trundles are in a rolling state, at the moment, on one hand, the bearing force of the furniture acts on the wheel shafts, and on the other hand, due to the buffering and vibration absorption effects of the compression springs, noise reduction and silence can be achieved when the furniture is moved; when a person sits on the furniture, the brake blocks move downwards to press the rims of the wheels under the action of the gravity of the human body to automatically brake, and at the moment, the bearing force of the furniture is transmitted to the rims with larger contact surfaces of the wheels, so that the caster can bear larger gravity; in addition, due to the fact that the caster is simple in structure and few in needed parts, and a special brake device does not need to be manually operated for braking, the caster is simple and reasonable in structure, large in bearing capacity and obvious in noise reduction and muting effect when the furniture is moved.

Description

Technical Field

[0001] This utility model relates to a caster used on furniture, and more particularly to a caster that automatically brakes when a person sits on the furniture using their own weight. Background Technology

[0002] We know that some casters used on office chairs, sofas, and other seated furniture have brakes, while others do not. Currently, brakeable casters on office chairs, sofas, and other seated furniture generally require manual operation of the braking mechanism to brake and release, resulting in a relatively complex structure and higher production costs. Furthermore, when these casters bear weight, the weight of the furniture first acts on the caster axle, and then the axle acts on the wheel itself, thus reducing the wheel's load-bearing capacity. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a new type of seated furniture with a simple and reasonable structure that can automatically brake when a person sits on it. It has a greater load-bearing capacity and a significant noise reduction and quieting effect when moving the furniture.

[0004] To solve the aforementioned technical problems, this utility model adopts the following technical solution:

[0005] A seat brake caster includes a fixed portion fixed to the leg of a seated furniture, a movable portion movable vertically relative to the fixed portion, and a compression spring, wherein:

[0006] The movable part includes a wheel frame, a wheel, and a wheel axle; the wheel frame is provided with at least two fixing block screw holes and one brake block screw hole; the wheel is mounted to the wheel fork of the wheel frame through the wheel axle;

[0007] The fixing part includes a fixing block, a fixing block mounting screw, a brake block, and a brake block mounting screw. The fixing block has screw through holes and threaded holes corresponding to the fixing block screw through holes and brake block screw through holes one on the wheel frame, respectively. After the fixing blocks are stacked on the wheel frame, they are fixed to the furniture leg by the fixing block mounting screws passing through the screw through holes and fixing block screw through holes. The brake block is located in the space between the wheel forks above the wheel. The brake block has an arc-shaped brake surface on the side facing the wheel, and has a second brake block screw through hole on it. The brake block mounting screw passes through the first brake block screw through hole and the second brake block screw through hole in sequence and is then tightened into the threaded hole of the fixing block.

[0008] There are at least two compression springs, with their upper and lower ends respectively contacting the opposing surfaces of the fixing block and the wheel frame.

[0009] In the improved design of the above-mentioned seat brake caster, multiple protruding strips are provided on the brake surface of the brake block; a brake block guide post is provided on the brake block that can slide in and out of the brake block screw through hole.

[0010] In the improved design of the above-mentioned seat brake caster, a hollow guide post 2 is provided on the fixing block, which can slide in the corresponding fixing block screw hole of the wheel frame.

[0011] In the improved design of the above-mentioned seat brake caster, the compression spring is installed in the compression spring placement hole of the wheel frame, and a positioning post that can be fitted into the compression spring is provided on the fixing block.

[0012] In the improved design of the above-mentioned seat brake caster, a fixing block receiving groove is provided on the upper surface of the wheel frame to accommodate the fixing block.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: Because it includes a fixed part fixed to the legs of the furniture, a movable part that can move vertically relative to the fixed part, and a compression spring, when the furniture is not occupied (i.e., unloaded), the casters are in a rolling state. At this time, on the one hand, the weight of the furniture acts on the axle; on the other hand, the compression spring has a buffering and vibration-absorbing effect, thus reducing noise when moving the furniture. When someone sits on the furniture, the brake block moves downward under the weight of the person and presses against the wheel rim to automatically brake. At this time, the weight of the furniture is transferred to the wheel rim, which has a larger contact surface, allowing the casters to bear greater weight. Furthermore, because the casters have a simple structure, require fewer parts, and do not require manual operation of a special braking device, this utility model has a simple and reasonable structure, greater load-bearing capacity, and significant noise reduction effect when moving furniture.

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments: Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the present utility model. Figure 1 ;

[0016] Figure 2 This is a three-dimensional schematic diagram of an embodiment of the present utility model. Figure 2 ;

[0017] Figure 3 This is a schematic diagram showing the separation of the fixed part and the movable part in an embodiment of this utility model;

[0018] Figure 4 This is an assembly diagram of an embodiment of the present invention. Figure 1 ;

[0019] Figure 5This is an assembly diagram of an embodiment of the present invention. Figure 2 . Detailed Implementation

[0020] This utility model is a caster with a seat brake, such as Figures 1 to 5 As shown, the casters automatically brake when you sit on them, as... Figures 1 to 5 As shown, it includes a fixed part 1 fixed to the furniture leg of the seating furniture, a movable part 2 that can move vertically relative to the fixed part 2, and a compression spring 3, wherein:

[0021] The movable part 2 includes a wheel frame 21, a wheel 22, and a wheel axle 23; the wheel frame 21 is provided with at least two fixing block screw through holes 212 and a brake block screw through hole 213; the wheel 22 is installed in the wheel fork 214 of the wheel frame 21 through the wheel axle 23;

[0022] The fixing part 1 includes a fixing block 11, a fixing block mounting screw 12, a brake block 13, and a brake block mounting screw 14. The fixing block 11 has screw through holes 111 and threaded holes 112 corresponding to the fixing block screw through holes 212 and brake block screw through holes 213 on the wheel frame 21, respectively. After the fixing blocks 11 are stacked on the wheel frame 21, they are fixed to the furniture leg by the fixing block mounting screws 12 passing through the screw through holes 111 and 212. The fixing block screw through holes 212 are typically countersunk holes, with the smaller hole at the upper end being larger than the fixing block mounting screw 14. The nut is small, and the large hole at the lower end is larger than the nut of the fixing block mounting screw 12. This further prevents the fixing block and the wheel frame from disengaging, thereby improving the reliability of the connection between the fixing block and the wheel frame. The brake block 13 is located in the space between the wheel forks 214 located above the wheel 22. The brake block 13 has an arc-shaped brake surface 131 on the side facing the wheel 22, on which a second brake block screw through hole 132 is provided. The brake block mounting screw 14 passes through the second brake block screw through hole 132 and the first brake block screw through hole 213 in sequence and is then tightened into the threaded hole 112 of the fixing block 11.

[0023] At least two compression springs 3 are provided, with their upper and lower ends respectively contacting the opposing surfaces of the fixing block 11 and the wheel frame 21. When bearing only the weight of the furniture, the spring force of the compression spring 3 should be sufficient to disengage the fixing block 11 and the wheel frame 21 from their face-to-face contact.

[0024] This utility model uses multiple fixing blocks and mounting screws 12 to install and fix it onto the legs of a seated furniture. In an unloaded state (i.e., without anyone sitting on it), under the action of the compression spring 3, the arc-shaped braking surface 131 of the brake block 13 disengages from the rim surface of the wheel 22. At this time, the wheel 22 is in a rolling state, thus moving the furniture to a suitable position. When someone sits on the furniture, the weight of the person overcomes the force of the compression spring, and the fixing block 11 causes the brake block 13 to move downwards and press against the rim of the wheel 22 to brake. At this time, the weight of the furniture is transferred to the rim of the wheel, which has a larger contact surface, thus allowing the caster to bear greater weight.

[0025] As can be seen from the above, when the furniture is unoccupied (i.e., unloaded), the casters are in a rolling state. At this time, on the one hand, the weight of the furniture acts on the axle, and on the other hand, the compression spring 3 has a buffering and vibration-absorbing effect, thus reducing noise when moving the furniture. When someone sits on the furniture, the brake block moves down and presses against the wheel rim under the action of the person's weight, thus braking without manual operation. At the same time, the weight of the furniture is transmitted to the wheel rim, allowing the casters to bear greater weight. In addition, because the casters have a simple structure, require fewer parts, and do not require manual operation of a special braking device, the structure of this utility model is simple and reasonable, with a greater load-bearing capacity and a significant noise reduction effect when moving furniture.

[0026] In this embodiment, multiple protrusions 133 are provided on the brake surface 131 of the brake block 13. When braking, the protrusions can sink into the wheel rim, thereby making the braking tighter. Preferably, the brake block 13 is provided with a brake block guide post 134 that can slide in and out of the brake block screw through hole 213.

[0027] Preferably, the fixing block 11 is provided with a hollow guide post 213 that can slide in the corresponding fixing block screw through hole 212 of the wheel frame 21, such as Figure 4 , 5 As shown, this makes the vertical movement between the fixed part 1 and the movable part 2 smoother, thus achieving a further noise reduction and silencing effect.

[0028] The compression spring 3 is installed in the compression spring placement hole 211 of the wheel frame 21. The fixing block 11 is provided with a positioning post 114 that can be fitted into the compression spring, so that the compression spring is compressed smoothly and the spring is prevented from popping out.

[0029] Preferably, the upper surface of the wheel frame 21 is provided with a fixing block receiving groove 215 into which the fixing block 11 can be inserted, such as... Figure 4 As shown, this is to make the vertical movement of the wheel frame 21 and the fixing block 11 more stable and reliable, and to reduce swaying.

[0030] In the description of this utility model, it should be understood that terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made to the present invention without departing from the principles and spirit of the present invention as defined by the claims. Therefore, the detailed description of the embodiments in this disclosure is for explanation only and not for limiting the present invention, but rather the scope of protection is defined by the content of the claims.

Claims

1. A caster with a brake seat, characterized in that, Includes a fixed part attached to the legs of the seating furniture, a movable part that can move vertically relative to the fixed part, and a compression spring, wherein: The movable part includes a wheel frame, a wheel, and a wheel axle; the wheel frame is provided with at least two fixing block screw holes and one brake block screw hole; the wheel is mounted to the wheel fork of the wheel frame through the wheel axle; The fixing part includes a fixing block, a fixing block mounting screw, a brake block, and a brake block mounting screw. The fixing block has screw through holes and threaded holes corresponding to the fixing block screw through holes and brake block screw through holes one on the wheel frame, respectively. After the fixing blocks are stacked on the wheel frame, they are fixed to the furniture leg by the fixing block mounting screws passing through the screw through holes and fixing block screw through holes. The brake block is located in the space between the wheel forks above the wheel. The brake block has an arc-shaped brake surface on the side facing the wheel, and has a second brake block screw through hole on it. The brake block mounting screw passes through the first brake block screw through hole and the second brake block screw through hole in sequence and is then tightened into the threaded hole of the fixing block. The upper and lower ends of the compression spring are in contact with the opposite surfaces of the fixing block and the wheel frame, respectively.

2. The brake caster according to claim 1, characterized in that, The brake surface of the brake block has multiple raised strips; the brake block has a brake block guide post that can slide in and out of the brake block screw through hole.

3. The brake caster according to claim 1, characterized in that, The fixed block is provided with a hollow guide post 2 that can slide in the corresponding fixed block screw hole of the wheel frame.

4. The caster with a brake seat according to claim 1, characterized in that, The compression spring is installed in the compression spring placement hole of the wheel frame, and a positioning post that can be fitted into the compression spring is provided on the fixing block.

5. The brake caster according to claim 1, characterized in that, The upper surface of the wheel frame is provided with a fixing block receiving groove into which the fixing block can be inserted.

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