Braking casters

Abstract

The present invention discloses a brake caster, comprising: a fixed seat, on which a stopper is arranged; a movable seat, which is rotatably arranged on the fixed seat; a single wheel, on which the single wheel is rotatably arranged on the movable seat; a brake device, wherein the brake device comprises a brake pedal and a brake member, wherein the brake pedal is rotatably arranged on the movable seat, and the brake member is rotatably arranged on the movable seat, and the brake member is provided with a first locking member corresponding to the brake pedal, a second locking member corresponding to the stopper, and an elastic member for driving the brake member to reset, wherein the brake pedal can push the brake member to rotate, so that the first locking member locks the single wheel, and the second locking member cooperates with the stopper to limit the rotation of the movable seat relative to the fixed seat. The brake member is pushed to rotate by the brake pedal, so that the first locking member locks the single wheel, and the second locking member cooperates with the stopper to limit the rotation of the movable seat relative to the fixed seat, the locking is reliable, the assembly is convenient, time is saved, and production efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of casters for garbage bins, in particular to a brake caster. Background Art

[0002] In the prior art, casters are typically installed at the bottom of trash cans (e.g., a 660L trash can). The casters include a fixed base, a movable base, and a single wheel. The movable base is rotatably connected to the fixed base, and the single wheel is rotatably connected to the movable base. While the single wheel rotates vertically relative to the movable base, the movable base can also rotate horizontally relative to the fixed base. Existing casters have a complex structure and numerous components. They are equipped with brakes and multiple torsion springs for brake positioning and reset. This not only requires numerous assembly steps, making assembly difficult and time-consuming, but also reduces production efficiency. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a brake caster that is easy to assemble, saves time, and can improve production efficiency.

[0004] According to an embodiment of the present invention, the brake caster includes: a fixed seat, which is provided with a stop portion; a movable seat, which is rotatably provided on the fixed seat; a single wheel, which is rotatably provided on the movable seat, and the rotation direction of the single wheel is perpendicular to the rotation direction of the movable seat; a braking device, which includes a brake pedal and a brake member, the brake pedal is rotatably provided on the movable seat, and the brake member is rotatably provided on the movable seat, and the brake member is provided with a first locking portion corresponding to the brake pedal, a second locking portion corresponding to the stop portion and an elastic portion for driving the brake member to reset, the brake pedal can push the brake member to rotate, so that the first locking portion locks the single wheel, and the second locking portion cooperates with the stop portion to limit the rotation of the movable seat relative to the fixed seat.

[0005] The brake caster according to the embodiment of the present invention has at least the following beneficial effects: the brake member is pushed to rotate by the brake pedal, so that the first locking part locks the single wheel and the second locking part cooperates with the stop part to limit the rotation of the movable seat relative to the fixed seat. The locking is reliable, the assembly is convenient, time is saved, and production efficiency can be improved.

[0006] According to some embodiments of the present invention, the first locking portion, the second locking portion, the elastic portion and the brake member are configured as an integrated structure with a simple structure. Compared with the prior art, there is no need to provide multiple torsion springs, the assembly parts are few and convenient, time is saved, and production efficiency can be improved.

[0007] According to some embodiments of the present invention, the brake component includes a plate body, a connecting ear is provided on the plate body, the connecting ear is rotatably connected to the movable seat, the first locking portion is located at the rear of the plate body, the second locking portion is located at the front of the plate body, and the elastic portion is located between the first locking portion and the second locking portion. The structure is simple and compact. By respectively providing the first locking portion and the second locking portion at the two ends of the brake component, and the elastic portion is located in front of the two, the user only needs to lightly step on the brake pedal to push the plate body, and the plate body rotates, so that one end of the plate body moves toward the single wheel and the other end moves toward the stop portion, thereby achieving simultaneous braking and directional effects. The structure has good stability, and the plate body is not easily deformed, has low rotational resistance, high rotational stability, and a large load-bearing capacity.

[0008] According to some embodiments of the present invention, the first locking part includes a connecting plate and a clamping area for locking the single wheel, the connecting plate includes a first section and a second section, the clamping area is arranged in the first section, the first section is parallel to or inclined to the plate body, and the first section is connected to the plate body through the second section. The structure is simple and the locking is reliable. The above structure enables the first locking part to have elastic deformation ability, which plays a buffering role when the user lightly steps on the brake pedal to push the plate body, which is beneficial to reduce the wear of the single wheel by the first locking part and increase the service life of the present invention, and can assist in the resetting of the plate body. It has good braking effect, high safety and reliability, meets the needs of caster sand policy, is easy and simple to operate, and has flexible braking.

[0009] According to some embodiments of the present invention, a wave plate is fixedly provided on the fixing seat, and the wave plate has an annular structure. The stop portion is a limiting notch provided around the side of the wave plate, and the second locking portion is a clamping block protruding toward the wave plate, and the clamping block can engage with the limiting notch. When the user lightly steps on the brake pedal to push the plate body, the plate body rotates, and the clamping block is located in the limiting notch. The two side walls of the limiting notch restrict the clamping block from rotating left and right, thereby orienting the caster. The structure is compact and the positioning is reliable. There is no need to worry about the clamping block being disengaged from the limiting notch due to vibration.

[0010] According to some embodiments of the present invention, the elastic portion is an elastic plate disposed on the upper side of the plate body, which is tilted upward and presses against the movable seat. After the wheel is braked and oriented, the elastic plate is restrained by the movable seat and presses downward toward the plate body. When the wheel is unlocked and the caster is oriented, the elastic plate returns to its tilted position, driving the plate body back into position. This structure not only provides a buffering effect but also helps reduce wear on the wheel by the first locking portion, thereby increasing the service life of the present invention.

[0011] According to some embodiments of the present invention, a push portion is provided on the side of the brake pedal facing the plate body. The push portion is capable of pushing against the upper side of the plate body and driving the plate body to rotate, thereby moving the first locking portion toward the single wheel. The push portion is capable of pushing against the upper side of the plate body and driving the plate body to rotate, thereby moving the first locking portion toward the single wheel. This provides a compact structure, convenient actuation, and facilitates directional braking of a single wheel.

[0012] According to some embodiments of the present invention, the movable seat includes: a movable bracket, one end of the movable bracket is rotatably connected to the fixed seat, and the other end of the movable bracket is rotatably connected to the single wheel via a first connecting member; a mounting plate, the mounting plate is arranged in the movable bracket and is located on the upper side of the single wheel, and the mounting plate is fixedly connected to the movable bracket via a second connecting member; wherein the brake member is rotatably connected to the second connecting member, and the brake pedal is rotatably connected to the mounting plate via a third connecting member and is located on the upper side of the brake member. The movable seat adopts a split structure for installation, which is easy to assemble and can make each component of the caster more compact. It has a reasonable design and is easy to maintain and replace. The orientation and positioning effects of the caster are good.

[0013] According to some embodiments of the present invention, the wave plate is fixedly connected to the fixed seat via a fixing member, and the wave plate is configured in the movable bracket and located above the mounting plate; the fixed seat and the movable bracket are recessed to form a first mounting position for placing a first steel ball, a dust ring covering the first steel ball is provided between the fixed seat and the movable bracket; the wave plate and the movable bracket are recessed to form a second mounting position for placing a second steel ball. The structure is compact and reasonable, and the provision of the first and second steel balls allows the movable bracket to rotate relatively smoothly relative to the fixed seat; in addition, a dust ring is provided to prevent dust.

[0014] According to some embodiments of the present invention, the wheel comprises a hub body and a wheel skin mounted on the hub body. The wheel skin comprises a PP inner layer in contact with the hub body and a TPR outer layer surrounding the PP inner layer. This is environmentally friendly, has a simple and novel structure, is durable, and has a long lifespan. If the wheel skin becomes severely worn and unusable, the TPR outer layer can be completely recycled. Furthermore, the manufacturing process is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0016] Figure 1 This is a schematic structural diagram of a brake caster according to an embodiment of the present invention;

[0017] Figure 2 A schematic cross-sectional view of the brake orientation of a brake castor;

[0018] Figure 3 for Figure 2 A magnified schematic diagram of the structure at center A;

[0019] Figure 4 A schematic diagram of the structure of the brake pedal and the brake member in which the brake member is not under stress;

[0020] Figure 5 The structural intention of the brake pedal and the brake component to achieve the maximum force point;

[0021] Figure 6 for Figure 1 Schematic diagram of the decomposition;

[0022] Figure 7 A schematic diagram of the structure of the brake pedal and brake components;

[0023] Figure 8 Schematic diagram of the wave disk structure.

[0024] Reference numerals:

[0025] Fixed seat 10, wave plate 20, stopper 21;

[0026] Movable seat 30, movable bracket 31, mounting plate 32;

[0027] Single wheel 40, wheel hub body 41, wheel skin 42;

[0028] Braking device 50, brake pedal 51, pushing portion 511, first side surface 5111, inclined surface 5112, second side surface 5113, stopper 512, brake member 52, first locking portion 521, connecting plate 5211, first section 52111, second section 52112, pressing area 5212, second locking portion 522, elastic portion 523, plate body 524, connecting ear 525, through hole 526;

[0029] A first connecting member 61, a second connecting member 62, a third connecting member 63, and a fixing member 64;

[0030] First steel ball 71 , dust ring 72 , second steel ball 73 . DETAILED DESCRIPTION

[0031] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0032] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0033] In the description of the present invention, if there is a description of first and second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0034] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0035] like Figures 1 to 3 As shown, according to an embodiment of the brake caster of the present invention, the fixed seat 10 is provided with a stop portion 21; the movable seat 30, the movable seat 30 is rotatably provided on the fixed seat 10; the single wheel 40, the single wheel 40 is rotatably provided on the movable seat 30, and the rotation direction of the single wheel 40 is perpendicular to the rotation direction of the movable seat 30; the brake device 50, the brake device 50 includes a brake pedal 51 and a brake member 52, the brake pedal 51 is rotatably provided on the movable seat 30, the brake member 52 is rotatably provided on the movable seat 30, and the brake member 52 is rotatably provided on the movable seat 30, and the brake member 52 is provided with a first locking portion 521 corresponding to the brake pedal 51, a second locking portion 522 corresponding to the stop portion 21 and an elastic portion 523 for driving the brake member 52 to reset, the brake pedal 51 can push the brake member 52 to rotate, so that the first locking portion 521 locks the single wheel 40, and the second locking portion 522 cooperates with the stop portion 21 to limit the movable seat 30 from rotating relative to the fixed seat 10.

[0036] According to the brake caster of an embodiment of the present invention, the brake pedal 51 pushes the brake member 52 to rotate, so that the first locking portion 521 locks the single wheel 40 and the second locking portion 522 cooperates with the stop portion 21 to limit the rotation of the movable seat 30 relative to the fixed seat 10. The locking is reliable, the assembly is convenient, time is saved, and production efficiency can be improved.

[0037] It should be noted that the fixing seat 10 is installed at the bottom of the trash can.

[0038] like Figures 1 to 7As shown, in some embodiments of the present invention, the first locking portion 521, the second locking portion 522, the elastic portion 523 and the brake member 52 are configured as an integrated structure with a simple structure. Compared with the prior art, there is no need to provide multiple torsion springs, the assembly parts are few and convenient, time is saved, and production efficiency can be improved.

[0039] like Figures 1 to 7 As shown, in some embodiments of the present invention, the brake member 52 includes a plate 524 with a connecting ear 525 disposed thereon. The connecting ear 525 is rotatably connected to the movable seat 30. A first locking portion 521 is located at the rear of the plate 524, a second locking portion 522 is located at the front of the plate 524, and an elastic portion 523 is located between the first locking portion 521 and the second locking portion 522. The structure is simple and compact. By disposing the first locking portion 521 and the second locking portion 522 at either end of the brake member 52, with the elastic portion 523 located therebetween, a user only needs to lightly depress the brake pedal 51 to push the plate 524, causing the plate 524 to rotate. This causes one end of the plate 524 to move toward the wheel 40 and the other end toward the stop 21, thereby achieving simultaneous braking and steering. The structure is highly stable, and the plate 524 is not easily deformed, has low rotational resistance, high rotational stability, and a large load capacity.

[0040] In some embodiments of the present invention, the first locking portion 521 includes a connecting plate 5211 and a pressing area 5212 for locking the single wheel 40. The connecting plate 5211 includes a first section 52111 and a second section 52112. The pressing area 5212 is arranged in the first section 52111. The first section 52111 is parallel to or inclined to the plate body 524. The first section 52111 is connected to the plate body 524 through the second section 52112. The structure is simple and the locking is reliable. The above structure enables the first locking portion 521 to have elastic deformation ability. When the user lightly steps on the brake pedal 51 to push the plate body 524, it plays a buffering role, which is beneficial to reduce the wear of the first locking portion 521 on the single wheel 40 and increase the service life of the present invention. It can also play an auxiliary role in the resetting of the plate body 524. It has good braking effect, high safety and reliability, meets the needs of caster sand policy, is easy and simple to operate, and has flexible braking.

[0041] like Figures 1 to 7As shown, it is contemplated that in some embodiments of the present invention, a through hole 526 is provided on the plate body 524, the second section 52112 is connected to a side wall of the through hole 526, and the pressing area 5212 includes a hollow annular protrusion that is perpendicular to and connected to the first section 52111. It should be noted that the plate body 524 is first stamped to form the through hole 526 and the first locking portion 521, and then the connecting plate 5211 is bent to form the first section 52111 and the second section 52112. The first section 52111 is then stamped a second time to form the hollow annular protrusion. With this structure, the hollow annular protrusion reduces material requirements. In some embodiments, depending on the size requirements of the wheel 40, components such as brake spikes may be added to the hollow portion of the annular protrusion. An effective distance exists between the first locking portion 521 and the wheel 40 for locking the wheel 40, allowing the first locking portion 521 to abut and lock the wheel 40, thereby improving the locking effect.

[0042] like Figures 1 to 8 As shown, in some embodiments of the present invention, a wave plate 20 is fixedly mounted on the fixing base 10. The wave plate 20 has an annular structure. The stopper 21 is a limiting notch provided on the side of the wave plate 20. The second locking portion 522 is a block protruding toward the wave plate 20, and the block can engage with the limiting notch. When the user lightly steps on the brake pedal 51 to push the plate 524, the plate 524 rotates, and the block is located in the limiting notch. The two side walls of the limiting notch restrict the block from rotating left and right, thereby orienting the caster. The structure is compact and the positioning is reliable. There is no need to worry about the block being disengaged from the limiting notch due to vibration.

[0043] It should be noted that the limiting notch is integrally formed with the wave disc 20, and the limiting notch is in the shape of a U-shaped opening that is concave inward along the side of the wave disc 20. During the production and molding process, the mold molding is convenient and fast. The structure of the wave disc 20 can reduce the wear on the mold, and further reduce materials and save costs.

[0044] like Figures 2 to 6 As shown, in some embodiments of the present invention, the elastic portion 523 is an elastic plate disposed above the plate body 524. The elastic plate is tilted upward and presses against the movable seat 30. After the wheel 40 is braked and oriented, the elastic plate is restrained by the movable seat 30 and presses downward toward the plate body 524. When the wheel 40 is unlocked and the caster is oriented, the elastic plate returns to its tilted position, driving the plate body 524 to return to its original position. This structure not only provides a buffering effect but also helps reduce wear on the wheel 40 by the first locking portion 521, thereby increasing the service life of the present invention.

[0045] It should be noted that in some embodiments of the present invention, the number of connecting ears 525 is set to two, and the elastic plate is located between the two connecting ears 525. The elastic plate includes an inclined section connected to the plate body 524 at one end and a straight section connected to the other end of the inclined section. The straight section is parallel to the movable seat 30. When the second locking portion 522 rotates toward the stop portion 21 on the locking wave plate 20, the straight section of the elastic plate presses against the movable seat 30 and is elastically compressed. Through the contact between the movable seat 30 and the flat surface of the straight section, the elastic plate is pushed more conveniently. This also reduces the risk of wear at the contact point between the elastic plate and the movable seat 30, thereby improving the reliability of reset.

[0046] like Figures 1 to 7 As shown, in some embodiments of the present invention, a pushing portion 511 is provided on the side of the brake pedal 51 facing the plate 524. The pushing portion 511 can push against the upper side of the plate 524 and can push the plate 524 to rotate, so that the first locking portion 521 moves toward the single wheel 40. The pushing portion 511 can push against the upper side of the plate 524 and can push the plate 524 to rotate, so that the first locking portion 521 moves toward the single wheel 40. The structure is compact and easy to drive, which facilitates the braking and direction of the single wheel 40.

[0047] It should be noted that the pushing portion 511 includes a first side surface 5111, an inclined surface and a second side surface 5113 connected in sequence. Figure 4 As shown, the distance from the center point of the wheel 40 to the center point of the rotation axis of the brake pedal 51 is the shortest straight line distance for the brake pedal 51 to apply force to the brake member 52, and is also the point where the brake member 52 is subjected to the greatest force. Figure 5 As shown, when the angle between the first side surface 5111 and the inclined surface 5112, that is, the contact point between the brake pedal 51 and the brake member 52, does not exceed the maximum force point of the brake member 52 during braking, the rebound of the brake member 52 will cause the brake pedal 51 to reverse, and there is no locking angle or locking point. Figure 2 、 Figure 3 and Figure 7 As shown, when the angle between the first side surface 5111 and the inclined surface 5112, when the contact point between the brake pedal 51 and the brake member 52 exceeds the maximum force point of the brake member 52 during braking, the brake member 52 rebounds and fits the straight surface of the brake handle. The angle between the first side surface 5111 and the inclined surface 5112, the center point of the single wheel 40 to the center point of the rotation axis of the brake pedal 51 and the contact surface between the brake pedal 51 and the brake member 52 form a triangular support to limit the brake member 52 from rebounding, thereby forming a locking angle between the brake member 52 and the brake pedal 51, with good braking effect and reliable locking.

[0048] like Figures 1 to 3 and Figure 6As shown, in some embodiments of the present invention, the movable seat 30 includes: a movable bracket 31, one end of which is rotatably connected to the fixed base 10, and the other end of the movable bracket 31 is rotatably connected to the single wheel 40 via a first connecting member 61; a mounting plate 32, which is disposed within the movable bracket 31 and located above the single wheel 40, and is fixedly connected to the movable bracket 31 via a second connecting member 62; wherein the brake member 52 is rotatably connected to the second connecting member 62, and the brake pedal 51 is rotatably connected to the mounting plate 32 via a third connecting member 63 and located above the brake member 52. The movable seat 30 adopts a split-structure installation, which is easy to assemble and enables each component of the caster to be installed more compactly. The design is reasonable, easy to maintain and replace, and the caster has good orientation and positioning effects.

[0049] It should be noted that in some embodiments of the present invention, the upper top surface of the above-mentioned mounting plate 32 abuts against the lower bottom surface of the movable bracket 31; there are two connecting ears 525, there is a distance between the two connecting ears 525, and the elastic part 523 is located between the two connecting ears 525; the connecting ears 525 are two curved plates on the plate body 524 that are arranged opposite to each other and have a distance between them, and the distance between the two curved plates is adapted to the second connecting member 62 for the second connecting member 62 to be inserted.

[0050] like Figures 1 to 3 、 Figure 6 and Figure 8 As shown, in some embodiments of the present invention, the wave plate 20 is fixedly connected to the fixed base 10 via a fixing member 64, and the wave plate 20 is disposed within the movable bracket 31 and located above the mounting plate 32. The fixed base 10 and the movable bracket 31 are recessed to form a first mounting position for accommodating a first steel ball 71. A dustproof ring 72 is provided between the fixed base 10 and the movable bracket 31 to cover the first steel ball 71. The wave plate 20 and the movable bracket 31 are recessed to form a second mounting position for accommodating a second steel ball 73. The structure is compact and reasonable. The provision of the first steel ball 71 and the second steel ball 73 allows the movable bracket 31 to rotate relatively smoothly relative to the fixed base 10. In addition, the provision of the dustproof ring 72 serves to prevent dust.

[0051] It should be noted that the above-mentioned fixing member 64 is a pin; in some embodiments of the present invention, part of the wave plate 20 can extend out of the mounting plate 32 to provide a second locking portion 522 that can be locked with the limiting notch on the wave plate 20. Overall, the caster has a compact structure, a reasonable and reliable design, high installation stability, and further reduces the installation volume of the entire caster.

[0052] It should be noted that if Figures 1 to 7As shown, in some embodiments of the present invention, a limit block 512 is provided on the upper part of the brake pedal 51. When the brake member 52 is not subjected to force, the limit block 512 abuts against the mounting plate 32 to ensure that there is enough space between the brake pedal 51 and the fixing seat 10 to step on the brake pedal 51.

[0053] like Figures 1 to 3 and Figure 6 As shown, in some embodiments of the present invention, a single wheel 40 includes a hub body 41 and a wheel skin 42 sleeved on the hub body 41. The wheel skin 42 includes a PP inner layer in contact with the hub body 41 and a TPR outer layer wrapping the PP inner layer. It is beneficial to green environmental protection, has a simple and novel structure, is durable and has a long service life. When the wheel skin 42 is severely worn and cannot be used, the TPR outer layer can be completely recycled and reused, and the manufacturing process is simple.

[0054] It should be noted that the corresponding TPR outer layer color can be selected according to needs, and some ring protection eye colors can be selected, which can be green. Of course, other colors are also possible and are not limited here.

[0055] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] Of course, the invention is not limited to the above-mentioned embodiments. Those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. Braking caster, characterized in that: include: A fixing seat (10), wherein a stopper (21) is provided on the fixing seat (10); A movable seat (30), the movable seat (30) being rotatably disposed on the fixed seat (10); a single wheel (40), the single wheel (40) being rotatably disposed on the movable seat (30), and the rotation direction of the single wheel (40) being perpendicular to the rotation direction of the movable seat (30); A brake device (50), the brake device (50) comprising a brake pedal (51) and a brake member (52), the brake pedal (51) being rotatably arranged on the movable seat (30), the brake member (52) being rotatably arranged on the movable seat (30), the brake member (52) being provided with a first locking portion (521) corresponding to the brake pedal (51), a second locking portion (522) corresponding to the stop portion (21), and an elastic portion (523) for driving the brake member (52) to return to its original position, the brake pedal (51) being capable of pushing the brake member (52) to rotate so that the first locking portion (521) locks the single wheel (40), and the second locking portion (522) cooperates with the stop portion (21) to limit the movable seat (30) from rotating relative to the fixed seat (10); The brake member (52) comprises a plate body (524), a connecting ear (525) is provided on the plate body (524), the connecting ear (525) is rotatably connected to the movable seat (30), the first locking portion (521) is located at the rear of the plate body (524), the second locking portion (522) is located at the front of the plate body (524), and the elastic portion (523) is located between the first locking portion (521) and the second locking portion (522); A pushing portion (511) is provided on a side of the brake pedal (51) facing the plate body (524), and the pushing portion (511) is capable of pushing and abutting against an upper side surface of the plate body (524) and of pushing the plate body (524) to rotate, so that the first locking portion (521) moves toward the single wheel (40); The pushing portion (511) comprises a first side surface (5111), an inclined surface, and a second side surface (5113) which are connected in sequence; The distance from the center point of the single wheel (40) to the center point of the rotation axis of the brake pedal (51) is the shortest straight-line distance for the brake pedal (51) to apply force to the brake member (52), and is also the point of maximum force on the brake member (52); When the contact point between the brake pedal (51) and the brake member (52) does not exceed the maximum force point of the brake member (52) during braking, the rebound of the brake member (52) will cause the brake pedal (51) to reverse, and there is no deadlock angle and deadlock point; When the contact point between the brake pedal (51) and the brake member (52) exceeds the maximum force point of the brake member (52) during braking, the brake member (52) rebounds to fit the straight surface of the brake handle, and the angle between the first side surface (5111) and the inclined surface (5112), the center point of the single wheel (40) to the center point of the rotation axis of the brake pedal (51), and the contact surface between the brake pedal (51) and the brake member (52) form a triangular support to limit the brake member (52) from rebounding, thereby forming a locking angle between the brake member (52) and the brake pedal (51).

2. The brake caster according to claim 1, characterized in that: The first locking portion (521), the second locking portion (522), the elastic portion (523) and the brake component (52) are configured as an integrated structure.

3. The brake caster according to claim 1, characterized in that: The first locking portion (521) comprises a connecting plate (5211) and a pressing area (5212) for locking the single wheel (40); the connecting plate (5211) comprises a first section (52111) and a second section (52112); the pressing area (5212) is arranged on the first section (52111); the first section (52111) is parallel to or inclined with respect to the plate body (524); and the first section (52111) is connected to the plate body (524) via the second section (52112).

4. The brake caster according to claim 3, characterized in that: A wave disc (20) is fixedly arranged on the fixing seat (10), and the wave disc (20) is an annular structure. The stop portion (21) is a limiting notch arranged around the side of the wave disc (20), and the second locking portion (522) is a block protruding toward the wave disc (20), and the block can be engaged with the limiting notch.

5. The brake caster according to claim 4, characterized in that: The elastic part (523) is an elastic plate arranged on the upper side of the plate body (524); the elastic plate is arranged to be tilted and press the movable seat (30).

6. The brake caster according to claim 4 or 5, characterized in that: The movable seat (30) comprises: A movable bracket (31), one end of the movable bracket (31) being rotatably connected to the fixed seat (10), and the other end of the movable bracket (31) being rotatably connected to the single wheel (40) via a first connecting member (61); a mounting plate (32), the mounting plate (32) being arranged inside the movable bracket (31) and located on the upper side of the single wheel (40), the mounting plate (32) being fixedly connected to the movable bracket (31) via a second connecting member (62); The brake member (52) is rotatably connected to the second connecting member (62), and the brake pedal (51) is rotatably connected to the mounting plate (32) via a third connecting member (63) and is located on the upper side of the brake member (52).

7. The brake caster according to claim 6, characterized in that: The wave plate (20) is fixedly connected to the fixing seat (10) via a fixing member (64), and the wave plate (20) is arranged in the movable bracket (31) and is located above the mounting plate (32); The fixed seat (10) and the movable bracket (31) are recessed with each other to form a first installation position for placing a first steel ball (71), and a dustproof ring (72) covering the first steel ball (71) is sleeved between the fixed seat (10) and the movable bracket (31); The wave plate (20) and the movable bracket (31) are recessed with each other to form a second installation position for placing a second steel ball (73).

8. The brake caster according to claim 1, characterized in that: The single wheel (40) comprises a wheel hub body (41) and a wheel skin (42) sleeved on the wheel hub body (41); the wheel skin (42) comprises a PP inner layer in contact with the wheel hub body (41) and a TPR outer layer wrapping the PP inner layer.

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