Trundle assembly and equipment

Abstract

The invention relates to the technical field of trundles, and discloses a trundle assembly and equipment. The caster assembly comprises a foot stool, a caster and a caster, the foot stool is of a hollow shell structure with an opening in one side, and a caster mounting cavity is formed in a hollow inner cavity of the foot stool; the trundle body is arranged in the trundle mounting cavity in a rolling manner; lock catch mounting structures are also arranged in the hollow inner cavities of the lock catch body and the foot stool; the lock catch body can slide between an unlocking position and a locking position along the lock catch installation structure under the action of external force, and when the lock catch body moves to the locking position, the caster body is at least limited and braked through the lock catch body. The foot stand is of a hollow shell structure with one side provided with an opening, the trundle body and the lock catch body serving as a brake structure are both arranged in a hollow inner cavity of the foot stand, the lock catch body is not arranged on the trundle body, the size of the trundle cannot be increased, reasonable arrangement of the trundle body and the lock catch body is facilitated, the lock catch body can be well hidden, and the trundle is convenient to use. And the appearance integrity and attractiveness of the trundle assembly are improved.

Description

Technical Field

[0001] This invention relates to the field of caster technology, and more specifically to a caster assembly and device. Background Technology

[0002] The equipment's bracket components are typically mounted to the equipment body using screws, resulting in a complex structure, cumbersome installation, and exposed casters that detract from the overall aesthetics. While some brackets employ snap-fit ​​connections, these are prone to disengagement, leading to unstable connections. Furthermore, industry-standard casters with built-in brakes generally have the braking mechanism integrated into the caster itself, resulting in larger casters that are difficult to integrate with concealed designs. Summary of the Invention

[0003] In view of this, the present invention provides a caster assembly and device to solve the problem that setting the braking structure on the caster results in a large caster size, making it difficult to be compatible with a concealed appearance.

[0004] In a first aspect, the present invention provides a caster assembly, comprising: The tripod is a hollow shell structure with an opening on one side, and a caster mounting cavity is formed in the hollow inner cavity of the tripod; The caster body is rotatably disposed within the caster mounting cavity; The locking body, the hollow inner cavity of the leg is also provided with a locking mounting structure; the locking body has an unlocking position and a locking position, the locking body can slide between the unlocking position and the locking position along the locking mounting structure under the action of external force, when the locking body moves to the locking position, at least the locking body limits and brakes the caster body.

[0005] Beneficial effects: The tripod has a hollow shell structure with an opening on one side. The caster body and the locking body, which serves as the braking structure, are both located in the hollow cavity of the tripod. Moreover, the locking body is not located on the caster body, so it does not increase the size of the caster. It also facilitates the reasonable arrangement of the caster body and the locking body, and the locking body is well hidden, which improves the overall appearance and aesthetics of the caster assembly.

[0006] In one alternative embodiment, the latch body includes a braking part; The end face of the caster body is provided with a brake groove. When the locking body moves to the locking position, the braking part extends into the brake groove.

[0007] Beneficial effects: When the locking body moves under external force, the braking part extends into the brake groove of the caster body, limiting the caster body at least circumferentially, preventing it from rotating and thus braking the caster. The braking method is simple, direct, and highly reliable. Because the engagement between the braking part and the brake groove is a rigid mechanical limit, compared to friction braking, it does not require continuous external force to maintain the braking state. Furthermore, the groove wall can form a reverse limit, ensuring that even if the equipment is subjected to slight impact, vibration, or tilting, the braking part will not disengage from the brake groove due to external disturbance, preventing accidental movement of the equipment. The braking process only requires the linear force of the locking body's movement, without needing to overcome the inertial friction of the caster's rotation, making manual operation easier and more convenient.

[0008] In one optional embodiment, there are multiple brake grooves distributed circumferentially along the caster body, and the braking part is matched and connected to any one of the brake grooves.

[0009] Beneficial effects: Multiple braking grooves are circumferentially arranged on the end face of the caster body, facilitating convenient braking at any rotation angle of the caster body. Furthermore, when the equipment needs to be temporarily stopped on an inclined surface, the distribution of multiple braking grooves allows the braking unit to connect to the groove that aligns with the direction of gravity, indirectly limiting the equipment's tendency to slide along the slope through circumferential positioning of the caster, forming a dual protection of circumferential braking and slope anti-slip. Simultaneously, if the equipment needs to be briefly stopped and its position finely adjusted during movement, a small-distance displacement can be achieved by switching the connection position of the braking grooves, without fully unlocking the casters, making operation more flexible.

[0010] In one alternative embodiment, the braking part includes a locking part, and the braking groove includes a locking groove; the locking part cooperates with the locking groove to restrict the circumferential rotation of the caster body; The locking body also includes a locking block, and the locking mounting structure includes a spring-loaded assembly, which is adapted to cooperate with the locking block to restrict the movement of the locking body along the axial direction of the caster body.

[0011] Beneficial effects: The locking block on the locking body can cooperate with the spring-loaded component on the locking mounting structure to restrict the locking body to the unlocked or locked position. When in the unlocked position, it prevents the locking body from sliding to the locked position due to bumps or tilting during normal equipment movement (caster body rolling). When in the locked position, it prevents the locking body from moving axially along the caster body and unlocking. With this design, the user must push the locking body to overcome the resistance of the spring-loaded component to move it to the locked position to brake the caster or to the unlocked position to unlock it. Furthermore, the unlocking process provides a notification that the unlocked position has been reached, preventing excessive force from causing the locking body to detach from the locking mounting structure.

[0012] In one optional embodiment, the braking part includes a locking part and a snap-fit ​​part; the snap-fit ​​part is disposed at one end of the locking part facing the caster body; The brake groove includes a locking groove, the locking groove has a side wall, and the side wall of the locking groove is provided with a snap-fit ​​element; the locking part cooperates with the locking groove and the snap-fit ​​part snaps with the snap-fit ​​element to restrict the circumferential rotation and axial movement of the caster body.

[0013] Beneficial effects: When in the locked position, the locking part of the brake unit engages with the locking groove of the caster body to restrict the circumferential rotation of the caster body. The snap-fit ​​part located on the end face of the locking part engages with the snap-fit ​​member on the side wall of the locking groove to restrict the axial movement of the caster body. After the brake unit engages with the brake groove, it can simultaneously restrict the circumferential rotation and axial movement of the caster body, thus achieving braking of the caster body. When unlocking, the snap-fit ​​part disengages from the snap-fit ​​member under the action of external force, and the locking part disengages from the locking groove, completing the unlocking process.

[0014] In one alternative embodiment, the tripod further includes: The partition, the locking mounting structure and the caster mounting cavity are located on both sides of the partition.

[0015] Beneficial effects: The partition physically isolates the locking area from the caster mounting cavity. Compared to designs without partitions where the locking is directly exposed to the outside of the equipment or in the same cavity as the caster, the partition can prevent external dust and foreign objects from directly contacting the locking components, avoiding the locking from jamming or braking failure due to the accumulation of contaminants, reducing the frequency of maintenance and cleaning of the locking, and extending its service life.

[0016] In one optional embodiment, a through hole is provided on the partition, and the braking part can pass through the through hole and engage with the braking groove to limit the caster body in at least a circumferential direction.

[0017] Beneficial effects: The through hole provides a dedicated through channel for the braking unit, which limits the movement trajectory of the braking unit and ensures that when the braking unit slides with the locking body, it can accurately point to the brake groove of the caster body along the axis of the through hole, avoiding the braking unit from deviating, jamming or interfering with other components, and the locking action is smooth, which significantly improves the accuracy and stability of the braking function.

[0018] In one optional embodiment, the latch body includes a first sliding portion, and the latch mounting structure includes a second sliding portion, wherein the first sliding portion and the second sliding portion are connected in a cooperative manner.

[0019] Beneficial effects: A first sliding part is provided on the locking body, which cooperates with the second sliding part of the locking mounting structure to realize the sliding of the locking body along the locking mounting structure and guide the movement of the locking body, so as to conveniently and quickly complete the limiting and locking of the locking body on the caster body.

[0020] In one alternative embodiment, one of the first sliding portion and the second sliding portion is a groove, and the other is a slider.

[0021] Beneficial effects: By using a combination of grooves and sliders, the movement direction of the locking body is strictly limited (along the direction perpendicular to the end face of the caster), ensuring that the braking part can accurately align with the through hole on the partition and the braking groove on the caster body with each movement, avoiding the locking body from shifting, jamming or swinging, and improving the reliability and ease of operation of the locking process.

[0022] In one optional embodiment, the latch body further includes a claw disposed on the first sliding portion; the latch mounting structure further includes a mating groove, the claw engaging with the mating groove and the claw being able to slide along at least a portion of the mating groove.

[0023] Beneficial effects: The locking claw on the first sliding part engages with the mating groove, further enhancing the connection reliability between the locking body and the locking mounting structure. This prevents the locking body from easily detaching from the stand, even when removed by the user. The length of the mating groove precisely matches the braking stroke of the locking body. The movement range of the locking claw within the groove is strictly limited. When the locking body moves to the locked position, the locking claw abuts against one end of the mating groove, preventing further movement and avoiding excessive insertion of the braking part into the braking groove, which could cause component deformation. When the locking body moves to the unlocked position, the locking claw abuts against the other end of the mating groove, preventing excessive retraction and loss of the guide trajectory. This ensures that the braking part achieves precise limiting within its effective stroke each time, avoiding problems such as over-braking or incomplete unlocking.

[0024] In one optional embodiment, the mating groove is L-shaped, and the L-shaped mating groove has a short side and a long side; the claw is inserted into the mating groove from the short side, the claw engages with the long side of the mating groove, and the claw slides along the long side of the mating groove.

[0025] Beneficial effects: The long side of the L-shaped mating groove is a groove opened along the axial direction of the caster body, and the short side of the L-shaped mating groove is a groove at a 90-degree angle or close to a 90-degree angle with the long side; the design of the short side of the L-shaped mating groove as the insertion channel and the long side as the sliding stroke creates a dual effect of one-way assembly and anti-disengagement limiting. That is, after the pawl is inserted from the short side, it needs to slide along the long side to the working position. At this time, the groove opening of the short side and the pawl are misaligned, and the pawl cannot be directly disengaged from the long side. Compared with the straight groove mating, it has an anti-disengagement locking function; L The short and long sides of the groove are perpendicularly distributed. After the claw is inserted, it needs to slide linearly along the long side. Its circumferential rotation is strictly limited by the groove wall (especially when the claw is a non-circular structure such as a rectangle or square). Compared with the straight groove type, it adds stability to the circumferential constraint. Even if the equipment is subjected to vibration or impact, the claw cannot rotate around its own axis, ensuring that the locking body always moves along the preset linear trajectory. The braking part is accurately aligned with the partition hole and the caster brake groove, avoiding braking deviation or locking failure caused by the rotation of the locking.

[0026] In one optional embodiment, the caster body includes a rotating shaft, and the caster mounting cavity is provided with a slot adapted to the rotating shaft, and the caster body is adapted to slide into the slot from the opening of the slot.

[0027] Beneficial effects: The sliding engagement of the slot and the rotating shaft enables tool-less, rapid assembly of the caster body. No bolts, nuts, or other fasteners are needed; simply align the rotating shaft with the slot and slide it in to secure it, significantly improving assembly efficiency. For subsequent maintenance, the caster body can be easily removed by sliding it in the reverse direction, without disassembling the entire frame structure, greatly reducing the time and cost of replacing and repairing the caster body. The shape of the slot precisely matches the rotating shaft (e.g., U-shape), and after engagement, the inner wall of the slot fits tightly against the rotating shaft, forming dual circumferential and axial positioning, preventing the caster body from shifting, moving, or tilting during rotation.

[0028] In one alternative embodiment, the slot has two opposing sidewalls, wherein at least one of the sidewalls is provided with an anti-disengagement step; And / or, the slot is provided with a fastening rib, which extends along the sliding direction of the caster body.

[0029] Beneficial effects: The anti-detachment steps are symmetrically arranged on the opposite side walls of the slot. After the rotating shaft of the caster body is engaged in the slot, the end face of the step and the shoulder or outer circumferential surface of the rotating shaft form a rigid abutment, which restricts the displacement of the rotating shaft from both sides of the axial direction. This prevents the rotating shaft from coming out along the slot opening and also avoids it from moving excessively into the slot, achieving precise axial bidirectional limiting. Even if the equipment is subjected to severe vibration, impact or tilt, the rotating shaft cannot break through the step limit, completely eliminating the risk of the caster body coming out of the slot and ensuring the safety of equipment operation. The fastening ribs extend along the sliding direction of the caster, forming line or multi-point contact with the end face of the rotating shaft. Compared to surface contact with the groove wall, the contact pressure is more concentrated, which can enhance the tightness of the fit between the rotating shaft and the groove through the squeezing effect, reducing the gap between them. Even if the equipment is subjected to vibration or impact, the rotating shaft is difficult to move within the groove. Combined with the anti-loosening step, the axial anti-loosening effect is further enhanced, preventing the caster body from becoming loose or making abnormal noises, and ensuring the stability of the limit position. In addition, the design of the fastening ribs extending along the sliding direction of the caster body (rotating shaft) forms a natural guide track. When the rotating shaft is inserted into the groove, it can slide smoothly along the extension direction of the fastening ribs, avoiding jamming or displacement caused by insufficient flatness or dimensional deviation of the groove inner wall.

[0030] Secondly, the present invention also provides an apparatus comprising: Base plate; The caster assembly described in any of the above embodiments, wherein the caster assembly is disposed on the base plate.

[0031] Beneficial effects: Since the device includes the caster assembly of the present invention, it has the same technical effects as the caster assembly, which will not be described in detail here.

[0032] In one alternative embodiment, a first connecting structure is provided on the base plate, and a second connecting structure is provided on the side of the leg away from the opening. The caster assembly is detachably mounted to the first connecting structure of the base plate via the second connecting structure.

[0033] Beneficial effects: The caster assembly is detachably installed on the base plate, which facilitates the replacement and maintenance of the caster assembly and improves convenience.

[0034] In one alternative embodiment, the second connecting structure includes a first latch, and the first connecting structure includes a second latch, wherein the first latch engages with the second latch.

[0035] Beneficial effects: The caster assembly and base plate are detachable and assembled using a snap-fit ​​connection, making installation and disassembly very convenient.

[0036] In one alternative embodiment, one of the first connecting structure and the second connecting structure includes a positioning hole, and the other includes a positioning post, the positioning post being disposed in the positioning hole.

[0037] Beneficial effects: The fit between the positioning pin and the positioning hole provides a reference guide for the snap-fit ​​engagement. During assembly, the positioning pin first inserts into the positioning hole, quickly calibrating the relative position of the caster assembly and the base plate, preventing damage caused by misalignment, jamming, or forced engagement of the snap-fit ​​due to positioning deviations. Simultaneously, the positioning fit allows the first and second snap-fits to automatically align and engage, eliminating the need for repeated manual adjustments and significantly improving assembly efficiency. After engagement, the snap-fit ​​primarily bears radial tensile or shear forces, while the positioning pin, inserted into the positioning hole, provides auxiliary support, distributing part of the load transmitted by the caster assembly to the positioning mating surface, preventing deformation and breakage caused by prolonged exposure to concentrated stress. Furthermore, the positioning fit restricts the relative movement between the caster assembly and the base plate, reducing fatigue wear on the snap-fit ​​due to vibration, and extending the service life and reliability of the snap-fit ​​connection.

[0038] In one alternative embodiment, the first connecting structure further includes a slot disposed on the side of the base plate away from the second buckle; the second connecting structure further includes a tongue disposed on the side of the leg away from the first buckle.

[0039] Beneficial effects: The engagement of the slot and the tongue, along with the snap-fit ​​connection, forms a two-end support structure. One end of the caster assembly is fixed by the engagement of the first and second snap-fits, while the other end is positioned and supported by the tongue inserted into the slot. This creates a symmetrical force system between the caster assembly and the base plate, avoiding the uneven force distribution caused by a single snap-fit ​​connection where one end is fixed and the other is suspended. Simultaneously, the close engagement of the tongue and the slot restricts the vertical warping and lateral swaying of the caster assembly. Even if the equipment is subjected to impact or vibration, the integrity of the connection structure is maintained, preventing deformation or loosening of the snap-fit ​​due to concentrated force on one side. During assembly, the tongue is first inserted into the slot for initial positioning, then the caster assembly is pushed to engage the snap-fits. The inner walls of the tongue and the slot guide the caster assembly along a preset trajectory, ensuring precise alignment of the first and second snap-fits and preventing damage caused by misalignment or forced compression. This is particularly suitable for mass production scenarios, eliminating the need for repeated manual calibration, significantly improving assembly efficiency, and ensuring consistent installation accuracy across all products. After the tongue is inserted into the slot, its side wall forms a mechanical barrier with the slot, which, together with the axial engagement of the latch, forms a two-way anti-dislodgement protection, enhancing the anti-pull-out capability and improving the safety of use. In one alternative implementation, the device is an electric heater.

[0040] Beneficial effects: The electric heater includes the caster assembly of the present invention. The caster body and the locking body, which serves as a braking structure, are both located in the hollow inner cavity of the frame. The locking body is not located on the caster body, so it does not increase the volume of the caster. It also facilitates the reasonable arrangement of the caster body and the locking body. The locking body can be well hidden, which improves the overall appearance and aesthetics of the caster assembly. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0042] Figure 1 This is a first-view perspective view of a caster assembly according to an embodiment of the present invention; Figure 2 This is a second-view perspective view of a caster assembly according to an embodiment of the present invention; Figure 3 This is a first-view sectional view of a caster assembly according to an embodiment of the present invention; Figure 4 This is a perspective view of a tripod according to an embodiment of the present invention; Figure 5 for Figure 4 A magnified schematic diagram of the central part of the structure; Figure 6 This is a perspective view of a latch body according to an embodiment of the present invention; Figure 7 This is a perspective view of a caster body according to an embodiment of the present invention; Figure 8 This is a schematic diagram of the installation structure of the caster body; Figure 9 This is a second-view sectional view of a caster assembly according to an embodiment of the present invention, showing the locking body in the unlocked position; Figure 10 This is a second-view sectional view of a caster assembly according to an embodiment of the present invention, showing the locking body in the locked position; Figure 11 This is a cross-sectional view of an electric heater with a caster assembly according to an embodiment of the present invention. The figure shows the state of the caster assembly during the installation process. Figure 12 This is a cross-sectional view of an electric heater with a caster assembly according to an embodiment of the present invention. The figure shows the state after the caster assembly is installed. Figure 13 This is a perspective structural diagram of an electric heater with a caster assembly according to an embodiment of the present invention; Figure 14 This is a perspective structural diagram of another locking body according to an embodiment of the present invention; Figure 15 This is a perspective view of another caster assembly according to an embodiment of the present invention, showing the locking body in the unlocked position; Figure 16 for Figure 15 A magnified view of the local structure; Figure 17 This is a perspective view of another caster assembly according to an embodiment of the present invention, showing the locking body in the locked position; Figure 18 for Figure 17 A magnified view of the local structure; Figure 19 This is a cross-sectional view of another caster assembly according to an embodiment of the present invention; Figure 20 for Figure 19 A magnified view of the local structure; Figure 21 This is a cross-sectional view of another caster assembly according to an embodiment of the present invention.

[0043] Explanation of reference numerals in the attached figures: 100. Caster assembly; 101. Tripod; 1011, Slider; 1012. Spring-loaded buckle assembly; 10121, First snap; 10122, Second snap; 1013, partition; 10131, via; 1014. Card slot; 1015. Anti-fall step; 1016. Fastening ribs; 1017. Mating groove; 102. Lock body; 1021. Locking part; 10211, Connecting part; 1022. Locking latch; 1023. Slide groove; 1024. Claw; 103. Caster body; 1031. Rotating shaft; 1032. Locking groove; 10321, SIM card connector; 104. First buckle; 105. Positioning post; 106. Tongue insertion; 200. Electric heater; 201. Second buckle; 202. Positioning hole; 203. Slot. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] In the description of the invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0046] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] The following is combined with Figures 1 to 21 The following describes embodiments of the present invention.

[0048] According to an embodiment of the present invention, in one aspect, such as Figures 1 to 3 As shown, a caster assembly 100 is provided, comprising: The leg 101 is a hollow shell structure with an opening on one side, and a caster mounting cavity is formed in the hollow inner cavity of the leg 101; The caster body 103 is rotatably disposed in the caster mounting cavity; The locking body 102 and the hollow inner cavity of the leg 101 are also provided with a locking mounting structure; the locking body 102 has an unlocking position and a locking position, and the locking body 102 can slide between the unlocking position and the locking position along the locking mounting structure under the action of external force. When the locking body 102 moves to the locking position, it at least limits and brakes the caster body 103.

[0049] The stand 101 is a hollow shell structure with an opening on one side. The caster body 103 and the locking body 102, which serves as a braking structure, are both located in the hollow cavity of the stand 101. Moreover, the locking body 102 is not located on the caster body 103, so it does not increase the size of the caster and facilitates the reasonable arrangement of the caster body 103 and the locking body 102. The locking body 102 is well hidden, which improves the overall appearance and aesthetics of the caster assembly 100.

[0050] In some embodiments, such as Figure 6 As shown, the latch body 102 includes a braking part; The end face of the caster body 103 is provided with a brake groove. When the locking body 102 moves to the locking position, the braking part extends into the brake groove.

[0051] When the locking body 102 moves under the action of external force, the braking part extends into the brake groove of the caster body 103, and the caster body 103 is limited at least in the circumferential direction, that is, the caster body 103 cannot rotate, thus completing the braking of the caster body 103. The braking method is simple and direct, and has high reliability. Since the engagement between the braking part and the brake groove is a rigid mechanical limit, compared with friction braking, there is no need to continuously apply external force to maintain the braking state, and the groove wall of the brake groove can form a reverse limit, so even if the equipment is subjected to slight collision, vibration or tilt, the braking part will not disengage from the brake groove due to external force disturbance to avoid accidental movement of the equipment. The braking process only requires the linear force of the movement of the locking body 102, without overcoming the inertial friction force of the caster rotation, making manual operation easier and more convenient.

[0052] In some embodiments, such as Figure 7 As shown, there are multiple brake grooves, which are distributed circumferentially along the caster body 103, and the braking part is matched and connected to any one of the brake grooves.

[0053] Multiple braking grooves are circumferentially arranged on the end face of the caster body 103, facilitating convenient braking at any rotation angle of the caster body 103. Moreover, when the equipment needs to be temporarily stopped on an inclined surface, the distribution of multiple braking grooves allows the braking unit to connect to the braking groove that matches the direction of gravity, indirectly limiting the equipment's sliding tendency along the slope through circumferential positioning of the caster, forming a dual protection of circumferential braking and slope anti-slip; at the same time, if the equipment needs to be briefly stopped and its position finely adjusted during movement, a small distance displacement can be achieved by switching the engagement position of the braking groove, without fully unlocking the caster, making operation more flexible.

[0054] In some embodiments, such as Figures 4-7As shown, the braking part includes a locking part 1021, and the braking groove includes a locking groove 1032; the locking part 1021 and the locking groove 1032 cooperate to restrict the circumferential rotation of the caster body 103; The locking body 102 also includes a locking block 1022, and the locking mounting structure includes a spring-loaded assembly 1012, which is adapted to cooperate with the locking block 1022 to restrict the movement of the locking body 102 along the axial direction of the caster body 103.

[0055] The locking block 1022 on the locking body 102 can cooperate with the spring-loaded assembly 1012 on the locking mounting structure to restrict the locking body 102 to either the unlocked or locked position. When in the unlocked position, it prevents the locking body 102 from sliding to the locked position due to bumps or tilting during normal equipment movement (rolling of the caster body 103). When in the locked position, it prevents the locking body 102 from moving axially along the caster body 103 and unlocking. With this design, the user must push the locking body 102 to overcome the resistance of the spring-loaded assembly 1012 to move it to the locked position to brake the caster or to the unlocked position to unlock it. Furthermore, the unlocking process provides a notification that the unlocked position has been reached, preventing excessive force from causing the locking body 102 to detach from the locking mounting structure.

[0056] Specifically, the spring-loaded assembly 1012 includes a first spring-loaded latch 10121 and a second spring-loaded latch 10122. The first spring-loaded latch 10121 and the second spring-loaded latch 10122 are spaced apart along the axial direction of the caster body 103, wherein the first spring-loaded latch 10121 is away from the caster body 103, and the second spring-loaded latch 10122 is close to the caster body 103. When in the locked position, the locking part 1021 of the locking body 102 cooperates with the locking groove 1032 of the caster body 103 to limit the circumferential movement of the caster body 103, and the locking block 1022 of the locking body 102 cooperates with the second spring-loaded latch 10122 of the locking mounting structure close to the caster body 103 to limit the axial movement, thereby achieving circumferential and axial limiting of the caster and completing braking. When unlocking, the locking body 102 is pushed to move away from the caster body 103, overcoming the resistance of the second spring latch 10122 and passing over the second spring latch 10122 to enter the unlocked position between the second spring latch 10122 and the first spring latch 10121. At this time, the first spring latch 10121 can restrict the locking body 102 from continuing to move away from the caster, while the second spring latch 10122 can restrict the locking body 102 from returning to the locked position during the movement of the equipment, thus affecting the rotation of the caster body 103.

[0057] It should be noted that the locking block 1022 has a guide slope, and the first spring latch 10121 and the second spring latch 10122 are also respectively provided with guide slopes. The guide slopes on the locking block 1022 and the spring latches make it easier for the locking body 102 to overcome the resistance of the first spring latch 10121 and the second spring latch 10122 under the action of external force, and smoothly pass over the first spring latch 10121 and the second spring latch 10122, making the operation more labor-saving and convenient.

[0058] In other embodiments, such as Figure 21 The braking part includes a locking part 1021 and a snap-fit ​​part 10211; the snap-fit ​​part 10211 is disposed at one end of the locking part 1021 facing the caster body 103; The brake groove includes a locking groove 1032, the locking groove 1032 has a side wall, and the side wall of the locking groove 1032 is provided with a snap-fit ​​member 10321; the locking part 1021 cooperates with the locking groove 1032 and the snap-fit ​​part 10211 snaps with the snap-fit ​​member 10321 to restrict the circumferential rotation and axial movement of the caster body 103.

[0059] When in the locked position, the locking part 1021 of the brake unit cooperates with the locking groove 1032 of the caster body 103 to restrict the circumferential rotation of the caster body 103. The latching part 10211 provided on the end face of the locking part 1021 cooperates with the latching member 10321 on the side wall of the locking groove 1032 to restrict the axial movement of the caster body 103. After the brake unit cooperates with the brake groove, it can simultaneously restrict the circumferential rotation and axial movement of the caster body 103, thereby braking the caster body 103. When unlocking, the latching part 10211 disengages from the latching member 10321 under the action of external force, and the locking part 1021 disengages from the locking groove 1032, completing the unlocking.

[0060] In some embodiments, such as Figure 2 and Figure 4 As shown, the tripod 101 further includes: The partition 1013, the locking mounting structure and the caster mounting cavity are located on both sides of the partition 1013.

[0061] The partition 1013 physically isolates the latch installation area from the caster installation cavity. Compared to designs without partition 1013 where the latch is directly exposed to the outside of the equipment or in the same cavity as the caster, partition 1013 can prevent external dust and foreign objects from directly contacting the latch components, avoiding the latch from jamming or failing to brake due to the accumulation of contaminants, reducing the frequency of maintenance and cleaning of the latch, and extending its service life.

[0062] In some embodiments, such as Figure 5As shown, the partition 1013 has a through hole 10131, and the braking part can pass through the through hole 10131 to cooperate with the braking groove for limiting, at least circumferentially limiting the caster body 103.

[0063] The through hole 10131 provides a dedicated through channel for the braking unit, which limits the movement trajectory of the braking unit and ensures that when the braking unit slides with the locking body 102, it can accurately point to the brake groove of the caster body 103 along the axis of the through hole 10131, avoiding the braking unit from deviating, jamming or interfering with other components, and ensuring a smooth locking action, which significantly improves the accuracy and stability of the braking function.

[0064] In some embodiments, the latch body 102 includes a first sliding portion, and the latch mounting structure includes a second sliding portion, wherein the first sliding portion and the second sliding portion are connected in a cooperative manner.

[0065] A first sliding part is provided on the locking body 102, which cooperates with the second sliding part of the locking mounting structure to realize the sliding of the locking body 102 along the locking mounting structure and guide the movement of the locking body 102, so as to conveniently and quickly complete the limiting and locking of the locking body 102 on the caster body 103.

[0066] In some embodiments, one of the first sliding portion and the second sliding portion is a groove 1023, and the other is a slider 1011.

[0067] By using the combination of the slide groove 1023 and the slider 1011, the direction of movement of the locking body 102 is strictly limited (along the direction perpendicular to the end face of the caster), ensuring that the braking part can be accurately aligned with the through hole 10131 on the partition 1013 and the braking groove on the caster body 103 with each movement, avoiding the locking body 102 from shifting, jamming or swinging, and improving the reliability and ease of operation of the locking process.

[0068] In some embodiments, such as Figure 14 The diagram illustrates the structure of a second type of latch body 102. The latch body 102 further includes a claw 1024 disposed on the first sliding portion; the latch mounting structure also includes a mating groove 1017, in which the claw 1024 engages with the mating groove 1017 and is slidably engaged along at least a portion of the mating groove 1017. Figures 15 to 20 The structure of the caster assembly 100 with the second type of locking body 102 is given.

[0069] The locking claw 1024 engages with the mating groove 1017, further enhancing the connection reliability between the locking body 102 and the locking mounting structure. This ensures that the locking body 102 will not easily detach from the stand 101 unless the user removes it. The length of the mating groove 1017 precisely matches the braking stroke of the locking body 102. The movement range of the locking claw 1024 within the mating groove 1017 is strictly limited. When the locking body 102 moves to the locked position, the locking claw 1024 abuts against one end of the mating groove 1017, preventing further movement and avoiding excessive insertion of the braking part into the braking groove, which could cause component deformation. When the locking body 102 moves to the unlocked position, the locking claw 1024 abuts against the other end of the mating groove 1017, preventing excessive retraction and loss of the guide trajectory. This ensures that the braking part achieves precise limiting within its effective stroke each time, avoiding over-braking or incomplete unlocking.

[0070] In some embodiments, such as Figures 16-18 As shown, the mating groove 1017 is L-shaped, and the L-shaped mating groove 1017 has a short side and a long side; the claw 1024 is inserted into the mating groove 1017 from the short side, the claw 1024 engages with the long side of the mating groove 1017, and the claw 1024 slides along the long side of the mating groove 1017.

[0071] The long side of the L-shaped mating groove 1017 is a groove opened along the axial direction of the caster body 103, and the short side of the L-shaped mating groove 1017 is a groove at a 90-degree angle or close to a 90-degree angle with the long side. The design of the short side of the L-shaped mating groove 1017 as the insertion channel and the long side as the sliding stroke creates a dual effect of unidirectional assembly and anti-disengagement limiting. That is, after the pawl 1024 is inserted from the short side, it needs to slide along the long side to the working position. At this time, the groove opening on the short side and the pawl 1024 are misaligned, and the pawl 1024 cannot directly disengage from the long side. Compared with a straight groove mating, it has an anti-disengagement locking function. Furthermore, the short side and long side of the L-shaped mating groove 1017 are perpendicularly distributed, and after the pawl 1024 is inserted, it needs to slide along the long side... The circumferential sliding mechanism strictly restricts the circumferential rotation of the claw (especially when the claw 1024 is a non-circular structure such as a rectangle or square). Compared with the straight groove type, it adds extra stability to the circumferential constraint. Even if the equipment is subjected to vibration or impact, the claw 1024 cannot rotate around its own axis, ensuring that the locking body 102 always moves along the preset linear trajectory. The braking part is precisely aligned with the through hole 10131 of the partition 1013 and the caster brake groove, avoiding braking offset or locking failure caused by the rotation of the locking mechanism.

[0072] In some embodiments, such as Figure 7 and Figure 5As shown, the caster body 103 includes a rotating shaft 1031, and the caster mounting cavity is provided with a slot 1014 adapted to the rotating shaft 1031. The caster body 103 is adapted to slide into the slot 1014 from the opening of the slot 1014.

[0073] The sliding engagement of the slot 1014 and the rotating shaft 1031 enables tool-free, rapid assembly of the caster body 103. No bolts, nuts, or other fasteners are required; simply align the rotating shaft 1031 with the slot of the slot 1014 and slide it in to secure it, significantly improving assembly efficiency. For subsequent maintenance, the caster body 103 can be easily removed by sliding it in the reverse direction, without disassembling the entire frame 101, greatly reducing the time and cost of replacing and repairing the caster body 103. The shape of the slot 1014 precisely matches the rotating shaft 1031 (e.g., U-shaped). After engagement, the inner wall of the slot 1014 fits tightly against the rotating shaft 1031, forming dual circumferential and axial positioning, preventing the caster body 103 from shifting, moving, or tilting during rotation.

[0074] In some embodiments, such as Figure 8 As shown, anti-detachment steps 1015 are symmetrically provided on the two opposite side walls of the slot 1014. Of course, in other embodiments, anti-detachment steps 1015 can also be provided on either of the two side walls of the slot 1014, depending on the internal space layout of the tripod 101.

[0075] Anti-detachment steps 1015 are symmetrically arranged on opposite side walls of the slot 1014. After the rotating shaft 1031 of the caster body 103 is engaged in the slot 1014, the end face of the step forms a rigid abutment with the shoulder or outer circumferential surface of the rotating shaft 1031, restricting the displacement of the rotating shaft 1031 from both axial sides. This prevents the rotating shaft 1031 from coming out along the groove direction of the slot 1014 and also avoids it from excessively moving into the slot 1014, achieving precise axial bidirectional limiting. Even if the equipment is subjected to severe vibration, impact or tilt, the rotating shaft 1031 cannot break through the step limit, completely eliminating the risk of the caster body 103 detaching from the slot 1014 and ensuring the safety of equipment operation.

[0076] In some embodiments, the slot 1014 is further provided with a fastening rib 1016, which extends along the sliding direction of the caster body 103.

[0077] The fastening rib 1016 extends along the sliding direction of the caster and forms line contact or multi-point contact with the outer peripheral surface of the rotating shaft 1031. Compared with the surface contact with the wall of the slot 1014, the contact pressure is more concentrated. The squeezing effect can enhance the tightness of the fit between the rotating shaft 1031 and the slot 1014, reduce the gap between the two, and make it difficult for the rotating shaft 1031 to move within the slot 1014, thus ensuring the stability of the limit.

[0078] In other embodiments, such as Figure 5 and Figure 8 As shown, while an anti-slip step 1015 is provided on the side wall of the slot 1014, a fastening rib 1016 is also provided in the slot 1014. The fastening rib 1016 extends along the sliding direction of the caster body 103.

[0079] The fastening rib 1016 extends along the sliding direction of the caster, forming line contact or multi-point contact with the outer circumferential surface of the rotating shaft 1031. Compared with the surface contact with the wall of the slot 1014, the contact pressure is more concentrated, which can enhance the tightness of the fit between the rotating shaft 1031 and the slot 1014 through the squeezing effect, reducing the gap between the two. Even if the equipment is subjected to vibration or impact, the rotating shaft 1031 is difficult to move within the slot 1014. Combined with the anti-disengagement step 1015, the axial anti-disengagement effect is further enhanced, preventing the caster body 103 from becoming loose or making abnormal noise, and ensuring the stability of the limit position. In addition, the design of the structure in which the fastening rib 1016 extends along the sliding direction of the caster body 103 (rotating shaft 1031) forms a natural guide track. When the rotating shaft 1031 is engaged in the slot 1014, it can slide smoothly along the extension direction of the fastening rib 1016, avoiding jamming or displacement caused by insufficient flatness or dimensional deviation of the inner wall of the slot 1014.

[0080] According to an embodiment of the present invention, in another aspect, an apparatus is also provided, comprising: Base plate; Caster assembly 100, the caster assembly 100 being disposed on the base plate.

[0081] Since the device includes the caster assembly 100 of the present invention, it has the same technical effects as the caster assembly 100, which will not be described in detail here.

[0082] In some embodiments, a first connecting structure is provided on the base plate, and a second connecting structure is provided on the side of the leg 101 away from the opening. The caster assembly 100 is detachably mounted to the first connecting structure of the base plate through the second connecting structure.

[0083] The caster assembly 100 is detachably mounted on the base plate, which facilitates the replacement and maintenance of the caster assembly 100 and improves convenience.

[0084] In some embodiments, the second connection structure includes a first buckle 104, and the first connection structure includes a second buckle 201, wherein the first buckle 104 engages with the second buckle 201.

[0085] The caster assembly 100 and the base plate are detachably assembled using a snap-fit ​​connection, making installation and disassembly very convenient.

[0086] In some embodiments, one of the first connecting structure and the second connecting structure includes a positioning hole 202, and the other includes a positioning post 105, which passes through the positioning hole 202. See also Figure 11 and Figure 12 .

[0087] The engagement of the positioning pin 105 and the positioning hole 202 provides a reference guide for the snap-fit ​​engagement. During assembly, the positioning pin 105 first inserts into the positioning hole 202 to quickly calibrate the relative position of the caster assembly 100 and the base plate, preventing damage caused by misalignment, jamming, or forced engagement of the snap-fit ​​due to positioning deviation. Simultaneously, the positioning engagement allows the first snap-fit ​​104 and the second snap-fit ​​201 to automatically align and engage, eliminating the need for repeated manual adjustments and significantly improving assembly efficiency. After engagement, the snap-fit ​​primarily bears radial tensile or shear forces. The positioning pin 105, inserted into the positioning hole 202, provides auxiliary support, distributing part of the load transmitted by the caster assembly 100 to the positioning mating surface, preventing deformation and breakage caused by prolonged exposure to concentrated stress. Furthermore, the positioning engagement restricts the relative movement between the caster assembly 100 and the base plate, reducing fatigue wear caused by vibration and extending the service life and reliability of the snap-fit ​​connection.

[0088] In some embodiments, the first connection structure further includes a slot 203 disposed on the side of the base plate away from the second buckle 201; the second connection structure further includes a tongue 106 disposed on the side of the leg 101 away from the first buckle 104.

[0089] The engagement of the slot 203 and the tongue 106, along with the snap-fit ​​connection, forms a two-end support structure. One end of the caster assembly 100 is fixed by engaging the first snap-fit ​​104 with the second snap-fit ​​201, while the other end is positioned and supported by inserting the tongue 106 into the slot 203. This creates a symmetrical force system between the caster assembly 100 and the base plate, avoiding the uneven force distribution caused by a single snap-fit ​​connection where one end is fixed and the other is suspended. Simultaneously, the close engagement of the tongue 106 and the slot 203 restricts the vertical warping and horizontal swaying of the caster assembly 100. Even if the equipment is subjected to impact or vibration, the integrity of the connection structure can be maintained, preventing deformation or loosening of the snap-fit ​​due to concentrated force on one side. During assembly, the tongue 106 is first inserted into the slot 203 for initial positioning. Then, the caster assembly 100 is pushed to engage the latches. The inner wall of the tongue 106 and the slot 203 guides the caster assembly 100 to move along a preset trajectory, ensuring precise alignment of the first latch 104 and the second latch 201, avoiding damage caused by misalignment or forced compression. This is particularly suitable for mass production scenarios, eliminating the need for repeated manual calibration, significantly improving assembly efficiency, and ensuring consistent installation accuracy across all products. After the tongue 106 is inserted into the slot 203, its side wall forms a mechanical barrier with the slot 203, which, combined with the axial engagement of the latches, creates bidirectional anti-disengagement protection, enhancing pull-out resistance and improving safety during use. In some embodiments, such as Figures 11-13 As shown, the device is an electric heater 200.

[0090] The electric heater 200 includes the caster assembly 100 of the present invention. The caster body 103 and the locking body 102, which serves as a braking structure, are both disposed in the hollow inner cavity of the bracket 101. The locking body 102 is not disposed on the caster body 103, so it does not increase the volume of the caster and facilitates the reasonable arrangement of the caster body 103 and the locking body 102. The locking body 102 can be well hidden, which improves the overall appearance and aesthetics of the caster assembly 100.

[0091] This invention provides a concealed caster assembly 100, including a caster bracket 101, a caster body 103, and a locking body 102. One end of the caster bracket 101 has a tongue 106, the other end has a latch, and a positioning post 105 is provided in the middle. The tongue 106 is inserted into a slot 203 in the base plate. Then, pressing the other end of the caster bracket 101 causes the positioning post 105 to pass into the positioning hole 202 in the base plate. Simultaneously, a first latch 104 engages with a second latch 201 in the base plate. The surface of the first latch 104 has an angled surface A of 75 to 80 degrees to ensure a secure latch and prevent disengagement. See below. Figure 12 .

[0092] Furthermore, the caster has a central rotating shaft, the two ends of which are respectively engaged in the slots 1014 on both sides of the bracket 101. The slots 1014 have locking points on both sides, and a fastening rib 1016 with an interference of 0.1mm is provided in the middle to ensure that the caster is securely installed and does not come loose, without the need for screws.

[0093] Furthermore, the locking body 102 is mounted on the stand 101 via the slide groove 1023, the locking block 1022, and the claw 1024. The claw 1024 enters the mating groove 1017 on the stand 101. By pressing the locking body 102, the locking block 1022 enters the spring-loaded buckle assembly 1012 of the stand 101. At the same time, the locking part 1021 is inserted into the locking groove 1032 on the end face of the caster body 103 through the through hole 10131 on the stand 101, locking the caster and preventing it from rotating, ensuring that the equipment will not move accidentally during use. Conversely, the user can pull out the locking body 102 to release the locking part 1021 from the locking groove 1032 to unlock the caster, restoring the caster to a freely rolling state for easy movement by the user.

[0094] After installation, the caster assembly 100 is completely concealed by the bracket 101, achieving a hidden layout and enhancing the overall appearance and aesthetics of the product. The caster assembly 100 is suitable for various mobile devices, such as medical equipment, office equipment, and home appliances, and has broad application prospects.

[0095] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A caster assembly, characterized in that, include: The leg (101) is a hollow shell structure with an open side, and a caster mounting cavity is formed in the hollow inner cavity of the leg (101); The caster body (103) is rotatably disposed in the caster mounting cavity; The locking body (102) and the hollow inner cavity of the leg (101) are also provided with a locking mounting structure; the locking body (102) has an unlocking position and a locking position, and the locking body (102) can slide between the unlocking position and the locking position along the locking mounting structure under the action of external force. When the locking body (102) moves to the locking position, the caster body (103) is limited and braked at least by the locking body (102).

2. The caster assembly according to claim 1, characterized in that, The latch body (102) includes a braking part; The end face of the caster body (103) is provided with a brake groove. When the locking body (102) moves to the locking position, the braking part extends into the brake groove.

3. The caster assembly according to claim 2, characterized in that, The number of brake grooves is multiple, and the multiple brake grooves are distributed circumferentially along the caster body (103). The brake part is matched and connected to any of the brake grooves.

4. The caster assembly according to claim 2, characterized in that, The braking part includes a locking part (1021), and the braking groove includes a locking groove (1032); the locking part (1021) and the locking groove (1032) cooperate to restrict the circumferential rotation of the caster body (103); The locking body (102) further includes a locking block (1022), and the locking mounting structure includes a spring-loaded assembly (1012), which is adapted to cooperate with the locking block (1022) to restrict the movement of the locking body (102) along the axial direction of the caster body (103).

5. The caster assembly according to claim 2, characterized in that, The braking part includes a locking part (1021) and a snap-fit ​​part (10211); the snap-fit ​​part (10211) is disposed at one end of the locking part (1021) facing the caster body (103); The brake groove includes a locking groove (1032), the locking groove (1032) has a side wall, and the side wall of the locking groove (1032) is provided with a snap-fit ​​member (10321); the locking part (1021) cooperates with the locking groove (1032) and the snap-fit ​​part (10211) snaps with the snap-fit ​​member (10321) to restrict the circumferential rotation and axial movement of the caster body (103).

6. The caster assembly according to claim 2, characterized in that, The tripod (101) also includes: The partition (1013) has the locking mounting structure and the caster mounting cavity located on both sides of the partition (1013).

7. The caster assembly according to claim 6, characterized in that, The partition (1013) has a through hole (10131) and the braking part can pass through the through hole (10131) and cooperate with the braking groove to limit the movement of the caster body (103) in the circumferential direction.

8. The caster assembly according to claim 2, characterized in that, The latch body (102) includes a first sliding part, and the latch mounting structure includes a second sliding part, wherein the first sliding part and the second sliding part are connected in cooperation.

9. The caster assembly according to claim 8, characterized in that, One of the first sliding part and the second sliding part is a groove (1023), and the other is a slider (1011).

10. The caster assembly according to claim 8, characterized in that, The latch body (102) further includes a claw (1024), which is disposed on the first sliding part; the latch mounting structure further includes a mating groove (1017), which is engaged with the mating groove (1017) and the claw (1024) can slide along at least a portion of the mating groove (1017).

11. The caster assembly according to claim 10, characterized in that, The mating groove (1017) is L-shaped, and the L-shaped mating groove (1017) has a short side and a long side; the claw (1024) is inserted into the mating groove (1017) from the short side, the claw (1024) engages with the long side of the mating groove (1017) and the claw (1024) slides along the long side of the mating groove (1017).

12. The caster assembly according to claim 1, characterized in that, The caster body (103) includes a rotating shaft (1031), and the caster mounting cavity is provided with a slot (1014) adapted to the rotating shaft (1031). The caster body (103) is adapted to slide into the slot (1014) from the opening of the slot (1014).

13. The caster assembly according to claim 12, characterized in that, The slot (1014) has two opposing sidewalls, at least one of which has an anti-detachment step (1015). And / or, a fastening rib (1016) is provided in the slot (1014), and the fastening rib (1016) extends along the sliding direction of the caster body (103).

14. A device, characterized in that, include: Base plate; The caster assembly (100) according to any one of claims 1 to 13, the caster assembly (100) being disposed on the base plate.

15. The device according to claim 14, characterized in that, The base plate is provided with a first connecting structure, and the side of the leg (101) away from the opening is provided with a second connecting structure. The caster assembly (100) is detachably installed on the first connecting structure of the base plate through the second connecting structure.

16. The device according to claim 15, characterized in that, The second connection structure includes a first buckle (104), and the first connection structure includes a second buckle (201), wherein the first buckle (104) and the second buckle (201) are engaged.

17. The device according to claim 15, characterized in that, One of the first connection structure and the second connection structure includes a positioning hole (202), and the other includes a positioning post (105) which passes through the positioning hole (202).

18. The device according to claim 16, characterized in that, The first connecting structure further includes a slot (203), which is located on the side of the base plate away from the second buckle (201); the second connecting structure further includes a tongue (106), which is located on the side of the leg (101) away from the first buckle (104).

19. The device according to any one of claims 14 to 18, characterized in that, The device is an electric heater (200).

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