Multifunctional trundle with front brake and rear brake
By designing a multi-functional caster with front and rear brakes, and combining a braking component and a steering component, the caster achieves both braking and steering locking functions, solving the technical problem that existing casters cannot achieve simultaneously, and meeting a variety of daily needs.
Patent Information
- Application Number
- CN202520080450.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-13
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-01-13
AI Technical Summary
Existing casters cannot simultaneously achieve steering lock and braking functions, thus failing to meet daily needs.
A multi-functional caster with front and rear brakes was designed, comprising a fixed base, a support, a brake assembly, and a locking assembly. The braking and directional locking functions of the caster are achieved by rotating the brake assembly and the locking assembly.
It enables switching between the swivel wheel state and the direction-locked state of the roller, meeting a variety of daily needs.
Smart Images
Figure CN223644568U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of caster technology, and in particular to a multi-functional caster with front and rear brakes. Background Technology
[0002] Some furniture, such as tables, cabinets, and chairs, is usually equipped with casters to support the furniture and facilitate its movement. Currently, some casters have brakes, and some are swivel casters, but none of these casters can lock their direction, which does not meet daily needs. Utility Model Content
[0003] This utility model aims to at least partially solve one of the technical problems in related technologies. To this end, this utility model proposes a multi-functional caster with front and rear brakes.
[0004] This utility model embodiment provides a multi-functional caster with front and rear brakes, the multi-functional caster with front and rear brakes includes:
[0005] The fixing seat is provided with a locking groove;
[0006] A support is located below the fixed base and is rotatably connected to the fixed base. The lower end of the support is provided with a roller, and the support is provided with a spring piece. The spring piece is provided with a brake part and a locking part.
[0007] A brake assembly is rotatably connected to the support, with the lower end of the brake assembly abutting against the front end of the spring piece; the rotation of the brake assembly can cause the front end of the spring piece to bend downwards, bringing the brake part closer to and fitting against the roller, or cause the front end of the spring piece to spring back, moving the brake part away from the roller.
[0008] A locking assembly is rotatably connected to the support. The rotation of the locking assembly can cause the rear end of the spring to bend upward, so that the locking part is inserted into the locking groove, thereby fixing the fixed seat and the support relative to each other, or it can cause the rear end of the spring to spring back, so that the locking part is disengaged from the locking groove.
[0009] The multi-functional caster with front and rear brakes according to this utility model embodiment has at least the following technical effects: When the brake part is away from the roller and the locking part is disengaged from the locking groove, the support can rotate relative to the fixed seat, and the roller is in a universal wheel state at this time; when locking is required, rotating the locking assembly causes the rear end of the spring to bend upward, thereby driving the locking part to insert into the locking groove, and the fixed seat and the support are relatively fixed, at which time the roller remains in one direction; when locking is not required, rotating the locking assembly causes the rear end of the spring to spring back, thereby driving the locking part to disengage from the locking groove; when braking is required, rotating the brake assembly causes the front end of the spring to bend downward, thereby driving the brake part to approach and fit against the roller. This multi-functional caster with front and rear brakes has both locking and braking functions, meeting a variety of daily needs.
[0010] According to some embodiments of the present invention, the brake assembly includes a first rotating shaft and a brake pedal. The first rotating shaft is mounted on the support, and the brake pedal is rotatably connected to the first rotating shaft. The lower end of the brake pedal is provided with a first abutting surface and a second abutting surface. The brake pedal can rotate relative to the first rotating shaft so that the first abutting surface or the second abutting surface abuts against the spring. When the first abutting surface abuts against the spring, the brake part moves away from the roller. When the second abutting surface abuts against the spring, the brake part moves closer to and fits against the roller.
[0011] According to some embodiments of this utility model, the first abutting surface is located behind the second abutting surface, the front end of the first abutting surface is connected to the rear end of the second abutting surface, and the included angle between the first abutting surface and the second abutting surface is an obtuse angle; when the first abutting surface abuts against the spring piece, the braking part moves away from the roller, and the brake pedal, the spring piece, and the support are relatively fixed to achieve self-locking; when the second abutting surface abuts against the spring piece, the braking part moves close to and fits against the roller, and the brake pedal, the spring piece, and the support are relatively fixed to achieve self-locking.
[0012] According to some embodiments of the present invention, the front end of the spring sheet is provided with a bent portion, the bent portion is inclined downward from back to front, and the lower end surface of the bent portion is provided with the brake portion.
[0013] According to some embodiments of this utility model, the locking assembly includes a second rotating shaft, a locking pedal, and a lifting seat. The support has a first elongated through hole, and the lifting seat has a second elongated through hole. The second rotating shaft passes through both the first and second elongated through holes and also passes through the locking pedal and the spring piece. The lower end of the locking pedal abuts against the lifting seat. Rotation of the locking pedal can drive the lifting seat to move in the vertical direction, thereby driving the second rotating shaft to reciprocate in the vertical direction within the first and second elongated through holes, causing the rear end of the spring piece and the locking part to move in the vertical direction.
[0014] According to some embodiments of this utility model, the lower end of the locking pedal is provided with a third abutment surface and a fourth abutment surface. The locking pedal rotates relative to the second rotating shaft so that the third abutment surface or the fourth abutment surface abuts against the lifting seat. When the third abutment surface abuts against the lifting seat, the second rotating shaft abuts against the lower end of the second elongated through hole, and the locking part disengages from the locking groove. When the fourth abutment surface abuts against the lifting seat, the second rotating shaft abuts against the upper end of the second elongated through hole, and the locking part inserts into the locking groove.
[0015] According to some embodiments of this utility model, the third abutting surface is located in front of the fourth abutting surface, the rear end of the third abutting surface is connected to the front end of the fourth abutting surface, and the included angle between the third abutting surface and the fourth abutting surface is an obtuse angle; when the third abutting surface abuts against the lifting seat, the locking pedal, the lifting seat, the spring piece, and the support are relatively fixed to achieve self-locking; when the fourth abutting surface abuts against the lifting seat, the locking pedal, the lifting seat, the spring piece, and the support are relatively fixed to achieve self-locking.
[0016] According to some embodiments of the present invention, the locking pedal is provided with a limiting part. When the locking pedal rotates in the first direction and the lifting seat abuts against the fourth abutting surface, the limiting part abuts against the lifting seat to restrict the locking pedal from continuing to rotate in the first direction.
[0017] According to some embodiments of the present invention, the locking assembly further includes a third rotating shaft, which passes through the support and is located below the second rotating shaft. The lifting seat is provided with a third elongated through hole, through which the third rotating shaft passes, and the third elongated through hole extends in the vertical direction.
[0018] According to some embodiments of the present invention, the lower end of the fixed base is provided with a fixed plate, the lower end of the fixed plate is inserted through and rotatably connected to the support, the outer side of the fixed plate is provided with a plurality of locking grooves, the plurality of locking grooves are distributed circumferentially along the fixed plate, and the upper end surface of the spring piece is provided with the locking part.
[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0021] Figure 1 This is a structural schematic diagram of a multi-functional caster with front and rear brakes according to some embodiments of this utility model;
[0022] Figure 2 This is an exploded view of a multi-functional caster with front and rear brakes according to some embodiments of this utility model;
[0023] Figure 3 This is a schematic diagram of the brake pedal structure according to some embodiments of the present invention;
[0024] Figure 4 This is a schematic diagram of the locking pedal structure according to some embodiments of the present invention;
[0025] Figure 5 This is a schematic diagram of the front and rear brake multi-functional caster in a locked state according to some embodiments of this utility model;
[0026] Figure 6 This is a schematic diagram of the front and rear brake multi-functional caster in braking state according to some embodiments of this utility model;
[0027] Figure 7 This is a schematic diagram of the structure of a multi-functional caster with front and rear brakes in some embodiments of the present invention, which is simultaneously in a locked state and a braking state.
[0028] Icon labels:
[0029] Fixed base 100, fixed plate 110, locking groove 111;
[0030] Support 200, first elongated through hole 201, roller 210, spring 220, brake part 221, locking part 222, bending part 230;
[0031] Brake assembly 300, first rotating shaft 310, brake pedal 320, first contact surface 321, second contact surface 322;
[0032] Locking assembly 400, second rotating shaft 410, locking pedal 420, third abutment surface 421, fourth abutment surface 422, lifting seat 430, second elongated through hole 431, third elongated through hole 432, limiting part 440, and third rotating shaft 450. Detailed Implementation
[0033] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0034] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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.
[0035] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.
[0036] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0037] The embodiments of this utility model will be further described below with reference to the accompanying drawings.
[0038] According to some embodiments of this utility model, refer to Figures 1 to 7 The multi-functional caster with front and rear brakes includes a fixed base 100, a support 200, a brake assembly 300, and a locking assembly 400. The lower end of the fixed base 100 has a locking groove 111. The support 200 is located below the fixed base 100 and is rotatably connected to it. The lower end of the support 200 has a roller 210 and a spring 220. The front end of the spring 220 has a brake part 221, and the rear end has a locking part 222. The brake assembly 300 is rotatably connected to the support 200 and is located in front of the support 200. The lower end of the brake assembly 300 abuts against the front end of the spring 220. Rotating the brake assembly 300 can cause the front end of the spring 220 to bend downwards, bringing the brake part 221 closer to and against the roller 210, or cause the front end of the spring 220 to spring back, moving the brake part 221 away from the roller 210. The locking assembly 400 is rotatably connected to the support 200. The locking assembly 400 is located on the rear side of the support 200. Rotating the locking assembly 400 can cause the rear end of the spring piece 220 to bend upward so that the locking part 222 is inserted into the locking groove 111, thereby fixing the fixed seat 100 and the support 200 relative to each other; or it can cause the rear end of the spring piece 220 to spring back, so that the locking part 222 is disengaged from the locking groove 111.
[0039] When the brake part 221 moves away from the roller 210 and the locking part 222 disengages from the locking groove 111, the support 200 can rotate relative to the fixed base 100, and the roller 210 is in the state of a universal wheel at this time.
[0040] When locking is required, rotating the locking assembly 400 causes the rear end of the spring piece 220 to bend upward, thereby driving the locking part 222 to insert into the locking groove 111. The fixed seat 100 and the support 200 are relatively fixed, and the roller 210 is kept in one direction.
[0041] When locking is not required, rotating the locking assembly 400 causes the rear end of the spring piece 220 to spring back, thereby driving the locking part 222 to disengage from the locking groove 111.
[0042] When braking is required, the brake assembly 300 is rotated to bend the front end of the spring 220 downward, thereby driving the brake part 221 to come closer to and fit against the roller 210.
[0043] When braking is not required, rotating the brake assembly 300 causes the front end of the spring 220 to spring back, thereby driving the brake part 221 away from the roller 210.
[0044] This multi-functional caster with front and rear brakes features both locking and braking functions, meeting a variety of daily needs.
[0045] According to some embodiments of this utility model, refer to Figures 2 to 7 The brake assembly 300 includes a first rotating shaft 310 and a brake pedal 320. The axis of the first rotating shaft 310 is in the left-right direction. The first rotating shaft 310 is mounted on the support 200. The brake pedal 320 is rotatably connected to the first rotating shaft 310. The lower end of the brake pedal 320 is provided with a first abutment surface 321 and a second abutment surface 322. The brake pedal 320 can rotate relative to the first rotating shaft 310 so that the first abutment surface 321 or the second abutment surface 322 abuts against the spring 220. When the first abutment surface 321 abuts against the spring 220, the brake part 221 moves away from the roller 210. When the second abutment surface 322 abuts against the spring 220, the brake part 221 approaches and fits against the roller 210. Preferably, the first abutment surface 321 is located behind the second abutment surface 322, the front end of the first abutment surface 321 is connected to the rear end of the second abutment surface 322, and the included angle between the first abutment surface 321 and the second abutment surface 322 is an obtuse angle. When the first abutment surface 321 abuts against the spring piece 220, the brake part 221 moves away from the roller 210, and the brake pedal 320, the spring piece 220, and the support 200 are relatively fixed to achieve self-locking. When the second abutment surface 322 abuts against the spring piece 220, the brake part 221 moves closer to and fits against the roller 210, and the brake pedal 320, the spring piece 220, and the support 200 are relatively fixed to achieve small-angle self-locking. When it is necessary to switch the spring piece 220 from abutting against the first abutment surface 321 to abutting against the second abutment surface 322, the self-locking force can be overcome by rotating the brake pedal 320 to achieve switching. The distance between the first rotating shaft 310 and the first abutting surface 321 is smaller than the distance between the first rotating shaft 310 and the second abutting surface 322.
[0046] Understandably, referring to Figure 5 and Figure 6When the brake pedal 320 rotates counterclockwise, causing the spring 220 to change from contacting the first contact surface 321 to contacting the second contact surface 322, the front end of the spring 220 is subjected to downward pressure, thereby causing the brake part 221 to adhere to the roller 210 and brake the roller 210, thus putting the front and rear brake multi-functional caster into a braking state. When the brake pedal 320 rotates clockwise, causing the spring 220 to change from contacting the second contact surface 322 to contacting the first contact surface 321, the front end of the spring 220 is no longer subjected to pressure from the brake pedal 320, and the front end of the spring 220 rebounds, thereby causing the brake part 221 to move away from the roller 210.
[0047] Preferred, refer to Figure 2 The front end of the spring 220 is provided with a bending part 230, which is inclined downward from back to front, and the lower end face of the bending part 230 is provided with a brake part 221.
[0048] According to some embodiments of this utility model, refer to Figure 2 , Figures 4 to 7 The locking assembly 400 includes a second rotating shaft 410, a locking pedal 420, and a lifting seat 430. The axis of the second rotating shaft 410 is oriented left-right. The support 200 has a first elongated through hole 201, and the lifting seat 430 has a second elongated through hole 431. Both the first elongated through hole 201 and the second elongated through hole 431 extend vertically. The second rotating shaft 410 passes through both the first elongated through hole 201 and the second elongated through hole 431. The second rotating shaft 410 also passes through the locking pedal 420 and the spring piece 220. The lower end of the locking pedal 420 abuts against the lifting seat 430. Rotation of the locking pedal 420 can drive the lifting seat 430 to move vertically, thereby driving the second rotating shaft 410 to reciprocate along the extension direction of the second elongated through hole 431, causing the rear end of the spring piece 220 and the locking part 222 to move vertically.
[0049] Preferred, refer to Figures 4 to 7The lower end of the locking pedal 420 is provided with a third abutment surface 421 and a fourth abutment surface 422. The locking pedal 420 rotates relative to the second rotating shaft 410 so that the third abutment surface 421 or the fourth abutment surface 422 abuts against the lifting seat 430. When the third abutment surface 421 abuts against the lifting seat 430, the second rotating shaft 410 abuts against the lower end of the second elongated through hole 431, and the locking part 222 disengages from the locking groove 111. When the fourth abutment surface 422 abuts against the lifting seat 430, the second rotating shaft 410 abuts against the upper end of the second elongated through hole 431, and the locking part 222 inserts into the locking groove 111. The third abutment surface 421 is located in front of the fourth abutment surface 422. The rear end of the third abutment surface 421 is connected to the front end of the fourth abutment surface 422, and the included angle between the third abutment surface 421 and the fourth abutment surface 422 is an obtuse angle. When the third abutment surface 421 abuts against the lifting seat 430, the locking pedal 420, the lifting seat 430, the spring 220, and the support 200 are relatively fixed to achieve a small-angle self-locking. When the fourth abutment surface 422 abuts against the lifting seat 430, the locking pedal 420, the lifting seat 430, the spring 220, and the support 200 are relatively fixed to achieve a small-angle self-locking. When it is necessary to switch the lifting seat 430 from abutting against the third abutment surface 421 to abutting against the fourth abutment surface 422, the self-locking force can be overcome by rotating the locking pedal 420 to achieve the switching. The distance between the second rotating shaft 410 and the third abutting surface 421 is smaller than the distance between the second rotating shaft 410 and the fourth abutting surface 422.
[0050] Understandably, referring to Figure 2 , Figures 4 to 7 When the locking pedal 420 rotates clockwise, the upper contact surface of the lifting seat 430 changes from contacting the third contact surface 421 to contacting the fourth contact surface 422, that is, from... Figure 6 Transform into Figure 5 In the locked state, the distance between the second rotating shaft 410 and the upper contact surface of the lifting seat 430 increases, thereby causing the second rotating shaft 410 to move upward relative to the second elongated through hole 431, thereby causing the rear end of the lifting seat 430 and the spring piece 220 to move upward, so that the locking part 222 of the spring piece 220 is inserted upward into the locking groove 111, so that the support 200 cannot rotate relative to the fixed seat 100, and the front and rear brake multi-functional caster is in the locked state.
[0051] It is also understandable that, referring to Figure 2 , Figures 4 to 7 When the locking pedal 420 rotates counterclockwise, the upper contact surface of the lifting seat 430 changes from contacting the fourth contact surface 422 to contacting the third contact surface 421, that is, from... Figure 5 Transform into Figure 6In the current state, the distance between the second rotating shaft 410 and the upper contact surface of the lifting seat 430 decreases, thereby causing the second rotating shaft 410 to move downward relative to the second elongated through hole 431, thereby causing the rear end of the lifting seat 430 and the spring piece 220 to move downward, so that the locking part 222 of the spring piece 220 disengages downward from the locking groove 111, allowing the support 200 to rotate relative to the fixed seat 100.
[0052] According to some embodiments of this utility model, refer to Figure 2 , Figure 4 and Figure 5 The locking pedal 420 is provided with a limiting part 440. When the locking pedal 420 rotates in the first direction and the lifting seat 430 abuts against the fourth abutment surface 422, the limiting part 440 abuts against the lifting seat 430 to restrict the locking pedal 420 from continuing to rotate in the first direction, thereby playing a limiting role. In this embodiment, the first direction is the clockwise direction.
[0053] According to some embodiments of this utility model, refer to Figure 2 and Figure 5 The locking assembly 400 also includes a third rotating shaft 450, which passes through the support 200 and is located below the second rotating shaft 410. The lifting seat 430 is provided with a third elongated through hole 432, through which the third rotating shaft 450 passes. The third elongated through hole 432 extends in the vertical direction. The third rotating shaft 450 can ensure that the lifting seat 430 moves in the vertical direction and prevent the lifting seat 430 from deviating.
[0054] It is also understandable that the third pivot 450 can limit the lowest height position of the lifting platform 430, referring to... Figure 2 , Figures 4 to 7 When the locking pedal 420 rotates clockwise, the upper contact surface of the lifting seat 430 changes from contacting the third contact surface 421 to contacting the fourth contact surface 422, that is, from... Figure 6 Transform into Figure 5 In this state, the distance between the second rotating shaft 410 and the upper abutment surface of the lifting seat 430 increases, thereby causing the second rotating shaft 410 to move upward relative to the second elongated through hole 431. Since the third rotating shaft 450 restricts the downward movement of the lifting seat 430, and the distance between the second rotating shaft 410 and the upper abutment surface of the lifting seat 430 increases, the second rotating shaft 410 instead applies an upward force to the lifting seat 430, thereby causing the lifting seat 430 and the rear end of the spring piece 220 to move upward, so that the locking part 222 of the spring piece 220 is inserted upward into the locking groove 111.
[0055] According to some embodiments of this utility model, refer to Figure 2The lower end of the fixed base 100 is provided with a fixed plate 110, the lower end of which is inserted through and rotatably connected to the support 200. The outer side of the fixed plate 110 is provided with multiple locking grooves 111, which are distributed circumferentially along the fixed plate 110. The upper end face of the spring piece 220 is provided with a locking part 222. It can be understood that when the roller 210 rotates to a certain angle, the locking part 222 can be inserted into one of the locking grooves 111 to lock the roller. The multiple locking grooves 111 can provide various orientations for the roller 210 after locking, satisfying various needs.
[0056] In this specification, the reference to the term "some embodiments" means that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0057] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A multi-functional caster with front and rear brakes, characterized in that, include: A fixing base (100) is provided with a locking groove (111); A support (200) is located below the fixed base (100). The support (200) is rotatably connected to the fixed base (100). A roller (210) is provided at the lower end of the support (200). The support (200) is provided with a spring (220). The spring (220) is provided with a brake part (221) and a locking part (222). A brake assembly (300) is rotatably connected to the support (200), and the lower end of the brake assembly (300) abuts against the front end of the spring (220). The rotation of the brake assembly (300) can cause the front end of the spring (220) to bend downward so that the brake part (221) moves closer to and fits against the roller (210), or cause the front end of the spring (220) to rebound so that the brake part (221) moves away from the roller (210). A locking assembly (400) is rotatably connected to the support (200). The rotation of the locking assembly (400) can cause the rear end of the spring piece (220) to bend upward, so that the locking part (222) is inserted into the locking groove (111) and the fixing seat (100) and the support (200) are relatively fixed, or cause the rear end of the spring piece (220) to spring back, so that the locking part (222) is disengaged from the locking groove (111).
2. The multi-functional caster with front and rear brakes according to claim 1, characterized in that, The brake assembly (300) includes a first rotating shaft (310) and a brake pedal (320). The first rotating shaft (310) is mounted on the support (200). The brake pedal (320) is rotatably connected to the first rotating shaft (310). The lower end of the brake pedal (320) is provided with a first abutment surface (321) and a second abutment surface (322). The brake pedal (320) can rotate relative to the first rotating shaft (310) so that the first abutment surface (321) or the second abutment surface (322) abuts against the spring piece (220). When the first abutment surface (321) abuts against the spring piece (220), the brake part (221) moves away from the roller (210). When the second abutment surface (322) abuts against the spring piece (220), the brake part (221) moves closer to and fits against the roller (210).
3. The multi-functional caster with front and rear brakes according to claim 2, characterized in that, The first abutting surface (321) is located behind the second abutting surface (322). The front end of the first abutting surface (321) is connected to the rear end of the second abutting surface (322). The included angle between the first abutting surface (321) and the second abutting surface (322) is an obtuse angle. When the first abutting surface (321) abuts against the spring piece (220), the brake part (221) moves away from the roller (210), and the brake pedal (320), the spring piece (220), and the support (200) are relatively fixed to achieve self-locking. When the second abutting surface (322) abuts against the spring piece (220), the brake part (221) moves close to and fits against the roller (210), and the brake pedal (320), the spring piece (220), and the support (200) are relatively fixed to achieve self-locking.
4. The multi-functional caster with front and rear brakes according to claim 2, characterized in that, The front end of the spring (220) is provided with a bending part (230), the bending part (230) is inclined downward from back to front, and the lower end face of the bending part (230) is provided with the brake part (221).
5. The multi-functional caster with front and rear brakes according to claim 1, characterized in that, The steering assembly (400) includes a second pivot (410), a steering pedal (420), and a lifting seat (430). The support (200) has a first elongated through hole (201), and the lifting seat (430) has a second elongated through hole (431). The second pivot (410) passes through both the first elongated through hole (201) and the second elongated through hole (431), and the second pivot (410) also passes through the steering pedal (420). The lower end of the locking pedal (420) abuts against the lifting seat (430) and the spring piece (220); the rotation of the locking pedal (420) can drive the lifting seat (430) to move in the up and down direction, thereby driving the second rotating shaft (410) to reciprocate in the up and down direction within the first elongated through hole (201) and the second elongated through hole (431), so that the rear end of the spring piece (220) and the locking part (222) move in the up and down direction.
6. The multi-functional caster with front and rear brakes according to claim 5, characterized in that, The lower end of the locking pedal (420) is provided with a third abutment surface (421) and a fourth abutment surface (422). The locking pedal (420) rotates relative to the second rotating shaft (410) so that the third abutment surface (421) or the fourth abutment surface (422) abuts against the lifting seat (430). When the third abutment surface (421) abuts against the lifting seat (430), the second rotating shaft (410) abuts against the lower end of the second elongated through hole (431), and the locking part (222) disengages from the locking groove (111). When the fourth abutment surface (422) abuts against the lifting seat (430), the second rotating shaft (410) abuts against the upper end of the second elongated through hole (431), and the locking part (222) inserts into the locking groove (111).
7. The multi-functional caster with front and rear brakes according to claim 6, characterized in that, The third abutment surface (421) is located in front of the fourth abutment surface (422). The rear end of the third abutment surface (421) is connected to the front end of the fourth abutment surface (422). The included angle between the third abutment surface (421) and the fourth abutment surface (422) is an obtuse angle. When the third abutment surface (421) abuts against the lifting seat (430), the locking pedal (420), the lifting seat (430), the spring piece (220), and the support (200) are relatively fixed to achieve self-locking. When the fourth abutment surface (422) abuts against the lifting seat (430), the locking pedal (420), the lifting seat (430), the spring piece (220), and the support (200) are relatively fixed to achieve self-locking.
8. The multi-functional caster with front and rear brakes according to claim 6, characterized in that, The locking pedal (420) is provided with a limiting part (440). When the locking pedal (420) rotates in the first direction and the lifting seat (430) abuts against the fourth abutting surface (422), the limiting part (440) abuts against the lifting seat (430) to restrict the locking pedal (420) from continuing to rotate in the first direction.
9. The multi-functional caster with front and rear brakes according to claim 5, characterized in that, The locking assembly (400) further includes a third rotating shaft (450), which passes through the support (200) and is located below the second rotating shaft (410). The lifting seat (430) is provided with a third elongated through hole (432), through which the third rotating shaft (450) passes and extends in the vertical direction.
10. The multi-functional caster with front and rear brakes according to claim 1, characterized in that, The lower end of the fixed base (100) is provided with a fixed plate (110), the lower end of the fixed plate (110) is inserted through and rotatably connected to the support (200), the outer side of the fixed plate (110) is provided with a plurality of locking grooves (111), the plurality of locking grooves (111) are distributed circumferentially along the fixed plate (110), and the upper end surface of the spring piece (220) is provided with the locking part (222).