Mobile device

Abstract

The utility model relates to mobile device technical field discloses mobile device, including casing and trundle assembly, casing bottom is equipped with installation area, is equipped with the engagement structure and first fixed part in installation area, trundle assembly includes support and trundle unit, support includes installation part, elastic buckle and second fixed part, rotates the wheel and installs in installation part, elastic buckle and engagement structure joint fit, first fixed part and second fixed part pass through first fastener fixed connection, the utility model elastic buckle and engagement structure joint can provide convenient preposition and prevent the function of falling off, first fixed part and second fixed part pass through first fastener and realize rigid fastening, ensure the connection reliability and structural stability in long -term use. Through the synergistic effect of two groups of structures, not only has simplified the assembly procedure, has promoted the installation efficiency, but also effectively prevented the trundle loosening or falling off due to vibration or dumping, enhanced the use safety and durability of equipment.

Description

Technical Field

[0001] This utility model relates to the field of mobile device technology, and specifically to mobile devices. Background Technology

[0002] In household or commercial appliances and equipment, casters are usually installed on the bottom for easy movement. Traditional caster installation methods often involve direct bolt fixing or setting up complex mounting brackets on the product casing and then locking the casters to them with multiple screws. This not only leads to cumbersome assembly processes, low production efficiency, and high manufacturing costs, but also makes the screw-based structure prone to loosening or even falling off under the continuous vibration generated during equipment operation, thus affecting the structural stability and long-term reliability of the machine. Utility Model Content

[0003] In view of this, the present invention provides a mobile device to solve the problems of cumbersome assembly process, low production efficiency, high manufacturing cost, and easy loosening or even detachment of casters.

[0004] This utility model provides a mobile device, including: The housing has a mounting area at its bottom, and the mounting area includes a locking structure and a first fixing part. A caster assembly includes a bracket and a caster unit; the bracket includes a mounting part, an elastic buckle, and a second fixing part, and the caster unit is mounted on the mounting part; the elastic buckle engages with the locking structure; the first fixing part and the second fixing part are fixedly connected by a first fastener.

[0005] Beneficial effects: By setting a locking structure and a first fixing part in the installation area at the bottom of the housing, and correspondingly setting an elastic buckle and a second fixing part on the caster assembly bracket, a double fixed connection between the caster assembly and the housing is achieved. The elastic buckle and locking structure engage to provide convenient pre-positioning and anti-detachment functions; the first and second fixing parts are rigidly fastened by a first fastener, ensuring connection reliability and structural stability during long-term use. Through the synergistic effect of these two structures, the assembly process is simplified, installation efficiency is improved, and caster loosening or detachment due to vibration or tipping is effectively prevented, enhancing the safety and durability of the equipment.

[0006] In one alternative embodiment, the mounting area includes a recessed platform located at the bottom of the housing.

[0007] Beneficial effects: Setting the installation area as a recessed platform structure at the bottom of the housing provides precise accommodation and limiting space for the caster assembly installation part, effectively avoiding assembly misalignment, ensuring the relative positional accuracy of the caster assembly and the housing, and improving overall assembly consistency; in addition, the recessed platform can reduce the amount of protrusion of the parts after installation, making the bottom structure of the equipment more compact and regular; at the same time, the recessed platform also enhances the structural rigidity and load-bearing capacity of the installation area, improves the housing's resistance to deformation under stress, and ensures stability during long-term use.

[0008] In one optional embodiment, the elastic buckle includes two spaced-apart buckle units, and the free end of each buckle unit has an outwardly protruding hook; the engaging structure includes: The fastening hole is provided on the bottom wall of the recessed platform; Two fastening ribs are located on opposite sides of the fastening hole; The buckle unit passes through the buckling hole, and the buckle hook engages with the corresponding buckling rib.

[0009] Beneficial effects: By setting two spaced-apart snap-fit ​​units with outward-protruding hooks at their free ends, combined with snap-fit ​​holes on the countersunk platform and symmetrically distributed snap-fit ​​ribs on both sides, the snap-fit ​​units, after passing through the snap-fit ​​holes, can stably engage with the corresponding snap-fit ​​ribs in both directions. This not only achieves quick and reliable pre-positioning of the caster assembly on the housing, preventing shaking or displacement during assembly, but also effectively disperses the snap-fit ​​force through symmetrical force distribution on both sides, improving connection strength and anti-detachment performance. Furthermore, the snap-fit ​​ribs provide limiting constraints on the hooks, preventing the snap-fit ​​from loosening due to vibration or tilting, thus enhancing the stability and durability of the installation. At the same time, no complicated alignment operation is required during assembly; simply inserting the snap-fit ​​unit into the snap-fit ​​hole completes the pre-fixing. During disassembly, separation can be achieved through elastic deformation, balancing assembly efficiency and ease of subsequent maintenance.

[0010] In one alternative embodiment, along the extending direction of the housing, the fastening rib extends from the fastening hole to the side wall of the recess.

[0011] Beneficial effects: Extending the snap-fit ​​ribs along the shell's extension direction from the snap-fit ​​holes to the side wall of the recessed platform not only effectively enhances the overall structural rigidity of the recessed platform area, but also allows the local stress generated by the snap-fit ​​to be transmitted along the ribs and dispersed to the side wall of the recessed platform, avoiding shell deformation or cracking caused by stress concentration. At the same time, the extended snap-fit ​​ribs form an integrated reinforced structure with the side wall of the recessed platform, improving the load-bearing capacity and impact resistance of the snap-fit ​​parts, ensuring that the elastic buckle can maintain a stable and reliable snap-fit ​​state even after long-term use or under external disturbance, thereby improving the firmness and durability of the caster assembly installation.

[0012] In one optional embodiment, the bottom wall of the sinking platform is further provided with a first through hole, the first through hole being opposite to and spaced apart from the fastening hole; the first fixing part includes a threaded post protruding from the periphery of the first through hole into the housing, and the threaded post is provided with a threaded connection hole. The second fixing part includes a first through hole provided in the bracket; the first fastener passes through the first through hole and the first through hole in sequence, and is threadedly connected to the threaded connection hole.

[0013] Beneficial effects: By setting first through holes in the recessed platform, which are opposite to and spaced apart from the snap-fit ​​holes, and forming threaded posts with threaded connection holes protruding into the housing around the periphery of the first through holes, the first fasteners can pass through the first through holes on the bracket and the first through holes in the recessed platform in sequence, ultimately achieving a stable threaded connection with the threaded posts. The snap-fit ​​positioning function achieved by the snap-fit ​​holes and elastic buckles is spatially separated from the mechanical fastening function achieved by the first through holes and threaded posts, avoiding structural interference. The elastic buckles provide quick assembly and initial anti-dislodgement, while the first fastener connection ensures reliability during long-term use, achieving dual installation and fixation.

[0014] In one alternative embodiment, the bracket is provided with a second through hole; the mounting portion includes a hollow column protruding upward from the periphery of the second through hole; The caster unit includes a cylindrical connecting part; the cylindrical connecting part passes through the second through hole and is connected to the hollow column.

[0015] Beneficial effects: By providing a second through hole on the bracket and a hollow column protruding upwards from the periphery of the second through hole, the cylindrical connecting part of the caster unit can pass through the second through hole from bottom to top and connect with the hollow column. This not only provides axial positioning and stable support for the caster unit, but also prevents radial swaying and axial disengagement of the caster unit during use through the cooperation between the hollow column and the cylindrical connecting part, thus improving rotational stability and load-bearing reliability.

[0016] In one alternative embodiment, the caster unit further includes a swivel wheel rotatably mounted on the cylindrical connecting portion.

[0017] Beneficial effects: The rotatable casters are mounted on the columnar connecting part, allowing the equipment to flexibly turn in any direction during movement, improving the convenience and maneuverability of movement; furthermore, the rotatable casters are connected to the detachable columnar connecting part, so if the casters are worn or malfunction, they can be quickly disassembled and replaced through the detachable connection between the columnar connecting part and the hollow column, without damaging the bracket or shell structure, making maintenance simple and efficient; while ensuring steering flexibility, it also takes into account the stability of installation and the compactness of the overall structure, which not only enhances the practicality of the equipment, but also optimizes the user experience.

[0018] In one alternative embodiment, the bottom wall of the sinking platform is further provided with a second through hole, through which the hollow column passes and is located inside the housing.

[0019] Beneficial effects: By setting a second through hole in the recessed platform, through which the hollow column passes and is placed inside the housing, the structure is made compact, the bottom of the equipment remains flat and regular, the longitudinal space occupancy is reduced, and damage to the hollow column and connecting parts caused by external collisions is avoided; the second through hole also provides radial guidance and limitation for the hollow column, improving the coaxiality and positioning accuracy of the caster assembly and the housing assembly, and preventing the casters from tilting or shifting during use; at the same time, after the hollow column extends into the housing, it can more evenly distribute the load transmitted by the caster unit, effectively reducing the local stress concentration at the connection between the bracket and the recessed platform, and enhancing the structural rigidity and load-bearing capacity of the entire installation area.

[0020] In an alternative embodiment, a tilt switch is also included, which is fixed to the housing.

[0021] Beneficial effects: By installing and fixing a tilt switch inside the housing, the equipment has an automatic tilt detection and safety protection function. When the equipment is placed normally, the tilt switch remains in the conducting state to ensure stable and normal operation. However, when the equipment is tilted beyond a safe angle or even falls over due to accidental collision, uneven ground, or improper operation, the tilt switch will switch to the disconnected state, directly cutting off the equipment's working circuit. This effectively avoids damage to internal core components caused by tilting and also prevents environmental safety hazards caused by the equipment continuing to operate after tilting, thus improving the safety and reliability of the equipment. At the same time, the tilt switch is fixed to the housing and can detect the tilt state synchronously with the main body of the equipment, unaffected by factors such as the movement of caster components, ensuring the detection accuracy and trigger sensitivity of the protection function.

[0022] In one alternative embodiment, the housing further includes a support portion that protrudes from the inner wall of the housing, and the tilt switch is mounted on the support portion.

[0023] Beneficial effects: By setting a protruding support on the inner wall of the housing and installing the tilt switch on the support, a stable and reliable installation platform is provided for the tilt switch, avoiding it from being directly attached to the curved surface or weak area of ​​the housing, which could lead to loosening or inaccurate sensing. It also ensures that the tilt switch maintains a preset posture and spatial position inside the equipment, thereby accurately sensing the tilt status of the entire machine. At the same time, the support can be integrally formed with the housing, enhancing the rigidity of the local structure, effectively dispersing installation stress, and preventing housing deformation or switch detachment due to vibration or long-term use. This not only improves the reliability of the safety protection function but also facilitates assembly and positioning.

[0024] In one alternative embodiment, the housing further includes a positioning part, and the tilt switch is provided with a positioning hole, the positioning part being inserted into the positioning hole.

[0025] Beneficial effects: By setting a positioning part on the housing and opening a corresponding positioning hole on the tilt switch, the two can be installed and positioned by plugging them together, effectively guiding the tilt switch to be installed quickly and accurately to the preset position during the assembly process.

[0026] In one alternative embodiment, the housing further includes a third fixing part, the tilt switch having a fixing hole, and a second fastener passing through the fixing hole and fixedly connected to the third fixing part.

[0027] Beneficial effects: By setting a third fixing part on the housing and corresponding fixing holes on the tilt switch, and connecting the second fastener through the fixing holes to the third fixing part, the tilt switch is reliably fixed inside the housing. This effectively prevents the tilt switch from shifting or loosening due to vibration or impact during equipment transportation, operation, or tilting, ensuring it always remains in the preset sensing posture, thereby guaranteeing the accuracy of tilt detection and the timely response of safety protection functions. Furthermore, the mechanical fastening method is more durable and reliable than adhesive or snap-fit ​​methods, making it suitable for electrical equipment with high safety requirements, and improving the overall structural stability, operational safety, and long-term reliability of the machine.

[0028] In one alternative implementation, the mobile device includes an electric heater. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, 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 this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a front view of a mobile device according to an embodiment of the present utility model; Figure 2 This is an exploded view of the connection structure of the mobile device according to an embodiment of the present utility model; Figure 3 This is an exploded view of the connection structure between the tilt switch and the housing according to an embodiment of the present invention; Figure 4 This is an exploded view of the caster assembly according to an embodiment of the present utility model; Figure 5 The electrical schematic diagram of the tilt switch used in a Class I appliance according to an embodiment of this utility model; Figure 6This is an electrical schematic diagram of a tilt switch used in Class II appliances according to an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures: 1. Shell; 11. Recessed platform; 111. Engaging structure; 1111. Snap-fit ​​hole; 1112. Snap-fit ​​rib; 112. First fixing part; 113. Second through hole; 114. Clearance opening; 12. Support part; 121. Support rib; 13. Positioning part; 14. Third fixing part; 15. Main shell; 16. End shell; 17. Support column; 2. Caster assembly; 21. Bracket; 211. Mounting part; 2111. Hollow column; 2112. Reinforcing rib; 212. Elastic buckle; 2121. Buckle unit; 2122. Hook; 213. Second fixing part; 214. Square hole; 22. Caster unit; 221. Column-shaped connecting part; 222. Caster wheel; 2221. Wheel frame; 2222. Swivel wheel; 23. First fastener; 3. Tilting switch; 31. Positioning hole; 32. Fixing hole; 33. Second fastener; 411. Live wire; 412. Neutral wire; 42. Main board control module; 43. Heating element assembly; 431. Heating element; 44. Self-resetting temperature limiter; 45. Non-self-resetting temperature limiter; 46. Operation panel; 47. Auxiliary circuit. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0036] The following is combined Figures 1 to 6 The following describes embodiments of the present invention.

[0037] According to an embodiment of the present invention, a mobile device is provided, including a housing 1 and a caster assembly 2; the bottom of the housing 1 is provided with an installation area, and the installation area is provided with a locking structure 111 and a first fixing part 112; the caster assembly 2 includes a bracket 21 and a caster unit 22; the bracket 21 includes an installation part 211, an elastic buckle 212 and a second fixing part 213, and the caster unit 22 is installed on the installation part 211; the elastic buckle 212 engages with the locking structure 111; the first fixing part 112 and the second fixing part 213 are fixedly connected by a first fastener 23.

[0038] In the above embodiment, by providing a locking structure 111 and a first fixing part 112 in the mounting area at the bottom of the housing 1, and correspondingly providing an elastic buckle 212 and a second fixing part 213 on the bracket 21 of the caster assembly 2, a double fixed connection between the caster assembly 2 and the housing 1 is achieved. The elastic buckle 212 engages with the locking structure 111, providing convenient pre-positioning and anti-detachment functions. The first fixing part 112 and the second fixing part 213 are rigidly fastened by a first fastener 23, ensuring connection reliability and structural stability during long-term use. Through the synergistic effect of the two sets of structures, the assembly process is simplified, installation efficiency is improved, and caster loosening or detachment due to vibration or tipping is effectively prevented, enhancing the safety and durability of the equipment.

[0039] In a specific embodiment, the housing 1 includes a main housing 15 and two end housings 16 respectively disposed at both ends of the main housing 15. The main housing 15 and the two end housings 16 together enclose a complete internal accommodating space. The main functional components of the moving device are arranged inside the main housing 15, while the mounting area for connecting the caster assembly 2 is disposed on the end housings 16, so that the caster assembly 2 can be stably installed at both ends of the bottom of the housing 1, which optimizes the internal space layout and improves the balance and load-bearing stability of the overall structure.

[0040] Specifically, each of the two end housings 16 is connected to a set of caster assemblies 2.

[0041] In specific implementations, the number of caster units 22 included in each caster assembly 2 is not limited and can be flexibly set according to actual needs.

[0042] Preferably, each caster assembly 2 in this application includes two caster units 22, which are arranged at intervals along the extension direction perpendicular to the housing 1 to improve support stability and enhance the balance and steering flexibility of the equipment during movement.

[0043] In one embodiment, the installation area includes a recessed platform 11 located at the bottom of the housing 1.

[0044] In the above embodiment, setting the installation area as a recessed platform 11 structure at the bottom of the housing 1 can provide precise accommodation and limiting space for the installation part 211 of the caster assembly 2, effectively avoiding assembly offset, ensuring the relative positional accuracy of the caster assembly 2 and the housing 1, and improving the overall assembly consistency; in addition, the setting of the recessed platform 11 can reduce the protrusion of the components after installation, making the bottom structure of the equipment more compact and regular; at the same time, the recessed platform 11 also enhances the structural rigidity and load-bearing capacity of the installation area, improves the deformation resistance of the housing 1 under stress, and ensures stability during long-term use.

[0045] In one embodiment, the elastic buckle 212 includes two buckle units 2121 spaced apart, and the free end of the buckle unit 2121 is provided with an outwardly protruding hook 2122; the engaging structure 111 includes an engaging hole 1111 and two engaging ribs 1112: the engaging hole 1111 is provided on the bottom wall of the recessed platform 11; the two engaging ribs 1112 are respectively located on opposite sides of the engaging hole 1111; wherein, the buckle unit 2121 passes through the engaging hole 1111, and the hook 2122 engages with the corresponding engaging rib 1112.

[0046] In the above embodiment, by setting two spaced-apart snap-fit ​​units 2121 and configuring outwardly protruding snap hooks 2122 at their free ends, in conjunction with the snap-fit ​​holes 1111 on the recessed platform 11 and the symmetrically distributed snap-fit ​​ribs 1112 on both sides, the snap-fit ​​unit 2121, after passing through the snap-fit ​​hole 1111, can stably achieve bidirectional snap-fit ​​with the corresponding snap-fit ​​rib 1112. This not only achieves rapid and reliable pre-positioning of the caster assembly 2 on the housing 1, but also avoids problems during assembly. Shaking or shifting, the clamping force is effectively dispersed through symmetrical force distribution on both sides, improving connection strength and anti-detachment performance; and the clamping rib 1112 forms a limiting constraint on the hook 2122 to prevent the buckle from loosening due to vibration or tilting, thus enhancing the stability and durability of the installation; at the same time, no complicated alignment operation is required during assembly, and the pre-fixing of the clamping unit 2121 can be completed simply by inserting the clamping unit 2121 into the clamping hole 1111. During disassembly and assembly, separation can be completed by elastic deformation, taking into account both assembly efficiency and convenience of later maintenance.

[0047] Specifically, the fastening hole 1111 is a rectangular through hole.

[0048] In a specific embodiment, the bracket 21 is provided with a square hole 214, and the snap-fit ​​unit 2121 is fixed to the inner side of one side of the square hole 214 and is spaced apart from the other three side holes, thereby forming a sufficient elastic deformation space around the snap-fit ​​unit 2121 to ensure that it can be smoothly deflected under pressure during the assembly process and snap-fit ​​after passing through the snap-fit ​​hole 1111.

[0049] In one embodiment, along the extending direction of the housing 1, the fastening rib 1112 extends from the fastening hole 1111 to the side wall of the recess 11.

[0050] In the above embodiment, the snap-fit ​​rib 1112 extends from the snap-fit ​​hole 1111 to the side wall of the recessed platform 11 along the extension direction of the housing 1. This not only effectively enhances the overall structural rigidity of the recessed platform 11 area, but also allows the local stress generated by the snap-fit ​​to be transmitted along the rib and dispersed to the side wall of the recessed platform 11, avoiding deformation or cracking of the housing 1 caused by stress concentration. At the same time, the extended snap-fit ​​rib 1112 and the side wall of the recessed platform 11 form an integrated reinforced structure, which improves the load-bearing capacity and impact resistance of the snap-fit ​​part, ensuring that the elastic buckle 212 can maintain a stable and reliable snap-fit ​​state even after long-term use or when subjected to external force disturbance, thereby improving the firmness and durability of the caster assembly 2 installation.

[0051] In one embodiment, the bottom wall of the recessed platform 11 is also provided with a first through hole, which is opposite to and spaced apart from the fastening hole 1111; the first fixing part 112 includes a threaded post protruding from the periphery of the first through hole into the housing 1, and the threaded post is provided with a threaded connection hole; the second fixing part 213 includes a first through hole provided in the bracket 21; the first fastener 23 passes through the first through hole and the first through hole in sequence, and is threadedly connected to the threaded connection hole.

[0052] In the above embodiment, by providing a first through hole in the recessed platform 11 that is opposite to and spaced apart from the snap-fit ​​hole 1111, and forming a threaded post with a threaded connection hole protruding into the housing 1 around the periphery of the first through hole, the first fastener 23 can pass through the first through hole on the bracket 21 and the first through hole of the recessed platform 11 in sequence, and finally achieve a stable threaded connection with the threaded post. The snap-fit ​​positioning function achieved by the snap-fit ​​hole 1111 and the elastic buckle 212 and the mechanical fastening function achieved by the first through hole and the threaded post are reasonably separated in space, avoiding structural interference; wherein the elastic buckle 212 provides quick assembly and initial anti-dislodgement, while the connection of the first fastener 23 ensures reliability in long-term use, thus realizing dual installation and fixation.

[0053] Specifically, the threaded post and the snap-fit ​​hole 1111 are spaced apart along the extension direction of the housing 1, and the threaded post is located between two snap-fit ​​ribs 1112.

[0054] Specifically, the first fastener 23 includes, but is not limited to, bolts, self-tapping screws, etc.

[0055] In one embodiment, the bracket 21 is provided with a second through hole; the mounting part 211 includes a hollow column 2111 protruding upward from the periphery of the second through hole; the caster unit 22 includes a columnar connecting part 221; the columnar connecting part 221 passes through the second through hole and is connected to the hollow column 2111.

[0056] In the above embodiment, by providing a second through hole on the bracket 21 and a hollow column 2111 protruding upward from the periphery of the second through hole, the cylindrical connecting part 221 of the caster unit 22 can pass through the second through hole from bottom to top and connect with the hollow column 2111. This not only provides axial positioning and stable support for the caster unit 22, but also prevents radial swaying and axial disengagement of the caster unit 22 during use through the cooperation between the hollow column 2111 and the cylindrical connecting part 221, thereby improving rotational stability and load-bearing reliability.

[0057] In a specific implementation, the bracket 21 is provided with two mounting parts 211, and the two mounting parts 211 are respectively connected to the two caster units 22 one by one.

[0058] Specifically, the two mounting parts 211 are symmetrically arranged on both sides of the fastening rib 1112 along the extension direction perpendicular to the housing 1, so that the force distribution of the caster assembly 2 at the bottom of the housing 1 is more balanced, which not only improves the stability and load-bearing capacity of the overall structure, but also facilitates the positioning symmetry and appearance consistency during assembly.

[0059] In one optional embodiment, the cylindrical connecting part 221 is detachably connected to the hollow column 2111 via an assembly structure. The assembly structure includes a mutually cooperating limiting protrusion and a locking part, one of which is disposed on the inner wall of the hollow column 2111, and the other on the outer wall of the cylindrical connecting part 221. By providing a mutually cooperating limiting protrusion and a locking part between the inner wall of the hollow column 2111 and the outer wall of the cylindrical connecting part 221, a detachable connection between the caster unit 22 and the bracket 21 is achieved. Furthermore, the locking design eliminates the need for additional fasteners; installation or disassembly can be completed simply by insertion and snapping, improving the convenience of assembly and maintenance. Simultaneously, the cooperation of the limiting protrusion and the locking part effectively restricts the axial movement of the cylindrical connecting part 221 within the hollow column 2111, ensuring the caster remains stable and does not loosen during operation, thus improving safety and durability.

[0060] Specifically, the limiting protrusion is an annular protrusion and the engaging part is an annular groove, so that the cylindrical connecting part 221 and the hollow column 2111 form a continuous circumferential engaging fit after axial insertion, ensuring that the connecting structure is subjected to uniform force and the assembly is stable.

[0061] In one embodiment, the caster unit 22 further includes a swivel wheel 222, which is rotatably mounted on the cylindrical connecting portion 221.

[0062] In the above embodiment, the caster wheel 222 is rotatably mounted on the cylindrical connecting part 221, enabling the equipment to flexibly turn in any direction during movement, improving the convenience and maneuverability of movement; and the caster wheel 222 is connected to the detachable cylindrical connecting part 221, so if the caster wheel 222 is worn or malfunctions, it can be quickly disassembled and replaced through the detachable cooperation between the cylindrical connecting part 221 and the hollow column 2111, without damaging the structure of the bracket 21 or the housing 1, making maintenance simple and efficient; while ensuring steering flexibility, it also takes into account the installation stability and the compactness of the overall structure, which not only enhances the practicality of the equipment, but also optimizes the user experience.

[0063] In a specific implementation, the caster wheel 222 includes a wheel frame 2221 and a rotating wheel 2222. The wheel frame 2221 is rotatably connected to the cylindrical connecting part 221 to achieve horizontal rotation around a vertical axis. The rotating wheel 2222 is rotatably mounted on the wheel frame 2221 and can roll around its own horizontal axis. Through two-stage rotational coordination, the caster wheel 222 can simultaneously achieve steering and movement during movement, that is, it has the ability to rotate in conjunction around two mutually perpendicular axes, thereby supporting the flexible movement of the equipment in any direction.

[0064] In one embodiment, the bottom wall of the recessed platform 11 is also provided with a second through hole 113, through which the hollow column 2111 passes and is located inside the housing 1.

[0065] In the above embodiment, by providing a second through hole 113 in the recessed platform 11, through which the hollow column 2111 passes and is placed inside the housing 1, the structure is compact, the bottom of the equipment remains flat and regular, the longitudinal space is reduced, and damage to the hollow column 2111 and the connecting parts caused by external collisions is avoided; the second through hole 113 can also provide radial guidance and limit for the hollow column 2111, improve the coaxiality and positioning accuracy of the caster assembly 2 and the housing 1, and prevent the caster from tilting or shifting during use; at the same time, after the hollow column 2111 extends into the housing 1, it can more evenly distribute the load transmitted by the caster unit 22, effectively reduce the local stress concentration at the connection between the bracket 21 and the recessed platform 11, and enhance the structural rigidity and load-bearing capacity of the entire installation area.

[0066] Specifically, the second through hole 113 is a round through hole.

[0067] Specifically, the hollow column 2111 is provided with reinforcing ribs 2112 on its outer periphery to improve structural rigidity and torsional resistance; a clearance opening 114 is provided on the periphery of the second through hole 113. When the hollow column 2111 passes through the second through hole 113, the reinforcing ribs 2112 can pass smoothly through the clearance opening 114, avoiding structural interference and ensuring smooth assembly.

[0068] In one embodiment, a tilt switch 3 is also included, which is fixed to the housing 1.

[0069] In the above embodiment, by setting and fixing the tilt switch 3 inside the housing 1, the equipment has an automatic tilt detection safety protection function. When the equipment is placed normally, the tilt switch 3 remains in the conducting state to ensure stable and normal operation of the equipment. However, when the equipment is tilted beyond a safe angle or even falls over due to accidental collision, uneven ground, or improper operation, the tilt switch 3 will switch to the disconnected state, directly cutting off the equipment's working circuit. This effectively avoids damage to internal core components caused by the equipment tipping over, and also prevents environmental safety hazards caused by the equipment continuing to operate after tipping over, thus improving the safety and reliability of the equipment. At the same time, the tilt switch 3 is fixed to the housing 1 and can detect the tilt state synchronously with the main body of the equipment, unaffected by factors such as the movement of the caster assembly 2, ensuring the detection accuracy and trigger sensitivity of the protection function.

[0070] Specifically, after assembly, the tilt switch 3 is fixedly connected to the product housing 1 and moves together with the product as a whole. When the product is in a normal vertical position, the contact ball inside the tilt switch 3 remains in the conductive position under the action of gravity, so that the circuit is closed and the product can work normally. Once the product tilts excessively or even falls over due to external force, uneven ground or other abnormal conditions, the tilt switch 3 tilts accordingly, and the internal contact ball rolls to the non-conductive position due to gravity, causing the circuit switch to open and the whole machine to immediately lose power and stop running.

[0071] In one embodiment, the housing 1 further includes a support portion 12, which protrudes from the inner wall of the housing 1, and the tilt switch 3 is mounted on the support portion 12.

[0072] In the above embodiment, by providing a protruding support part 12 on the inner wall of the housing 1 and installing the tilt switch 3 on the support part 12, not only is a stable and reliable installation platform provided for the tilt switch 3, avoiding its direct attachment to the curved surface or weak area of ​​the housing 1, which could lead to loosening or inaccurate sensing, but it can also ensure that the tilt switch 3 maintains a preset posture and spatial position inside the equipment, thereby accurately sensing the tilt state of the whole machine; at the same time, the support part 12 can be integrally formed with the housing 1, enhancing the rigidity of the local structure, effectively dispersing the installation stress, and preventing the housing 1 from deforming or the switch from falling off due to vibration or long-term use, which not only improves the reliability of the safety protection function, but also facilitates assembly and positioning.

[0073] Specifically, the support part 12 includes two spaced-apart support ribs 121. The two support ribs 121 protrude from the inner wall of the housing 1 and are arranged in parallel to form a stable mounting platform for supporting the tilt switch 3. The arrangement of the two support ribs 121 improves the uniformity of load bearing and ensures that the tilt switch 3 is stable in posture and reliable in sensing during use.

[0074] In one embodiment, the housing 1 further includes a positioning part 13, and the tilt switch 3 is provided with a positioning hole 31, and the positioning part 13 is inserted into the positioning hole 31.

[0075] In the above embodiment, by providing a positioning part 13 on the housing 1 and correspondingly opening a positioning hole 31 on the tilt switch 3, the two are installed and positioned by plugging and connecting, effectively guiding the tilt switch 3 to be installed quickly and accurately to the preset position during the assembly process.

[0076] In one embodiment, the housing 1 further includes a third fixing part 14, the tilt switch 3 is provided with a fixing hole 32, and the second fastener 33 passes through the fixing hole 32 and is fixedly connected to the third fixing part 14.

[0077] In the above embodiment, by providing a third fixing part 14 on the housing 1 and correspondingly opening a fixing hole 32 on the tilt switch 3, and connecting the second fastener 33 through the fixing hole 32 to the third fixing part 14, the tilt switch 3 is reliably fixed inside the housing 1. This effectively prevents the tilt switch 3 from shifting or loosening due to vibration or impact during equipment transportation, operation, or tilting, ensuring that it is always in the preset sensing posture, thereby guaranteeing the accuracy of tilt detection and the timely response of the safety protection function. At the same time, the mechanical fastening method is more durable and reliable than bonding or snap-fitting, and is suitable for electrical equipment with high safety requirements, improving the overall structural stability, operational safety, and long-term operational reliability of the machine.

[0078] Specifically, the inner wall of the housing 1 has two parallel support columns 17 protruding from it. Both support columns 17 are located above the support portion 12 and extend from the inner wall of the housing 1 into the housing 1. One support column 17 has a positioning portion 13 protruding from its end. The positioning portion 13 is a positioning post protruding from the support column 17 and is used to insert and cooperate with the corresponding positioning hole 31 on the tilt switch 3. The other support column 17 has an internal threaded hole to form a third fixing portion 14. The second fastener 33 passes through the fixing hole 32 on the tilt switch 3 and is threaded into the internal threaded hole, thereby firmly fixing the tilt switch 3 to the support column 17. Specifically, the second fastener 33 includes, but is not limited to, screws, bolts, etc.

[0079] In one embodiment, the mobile device includes an electric heater.

[0080] It should be noted that the mobile device in this application can be applied to a variety of portable household or commercial electrical appliances, including but not limited to electric heaters, air purifiers, humidifiers, dehumidifiers, fans, etc. In this application, the preferred mobile device is an electric heater.

[0081] In one embodiment of this example, when the mobile device is an electric heater and belongs to Class I appliances, such as Figure 5As shown, AC power is supplied through a live wire 411 and a neutral wire 412. The live wire 411 is connected to the heating element assembly 43 via the tilt switch 3 and the main board control module 42, while the neutral wire 412 is directly connected to the heating element assembly 43. The heating element assembly 43 consists of multiple heating elements 431 connected in parallel. The housing 1 is reliably grounded through a grounding terminal, forming a safety structure requiring basic insulation and protective grounding as required by Class I appliances. The tilt switch 3 is connected in series in the main power supply circuit and automatically disconnects when the product tilts, cutting off the power supply to the entire machine. The heating element assembly 43 is protected by both a self-resetting temperature limiter 44 and a non-self-resetting temperature limiter 45. The self-resetting temperature limiter 44 is used for normal constant temperature cycle control, while the non-self-resetting temperature limiter 45 disconnects when the temperature rises abnormally to prevent overheating hazards. The main board control module 42 is communicatively connected to the display board and the operation panel 46, receiving user settings and executing temperature control logic, while coordinating the operation of auxiliary circuits 47 such as the fan.

[0082] Specifically, Class I appliances are electrical devices that rely on basic insulation for protection against electric shock, and provide additional safety protection by connecting accessible conductive parts to the protective grounding terminal in the building's fixed wiring. When the basic insulation fails due to a fault, the grounding measures allow the fault current to be safely conducted to the earth through the protective grounding conductor, thereby triggering the overcurrent protection device to operate, cutting off the power supply, and preventing the user from being at risk of electric shock.

[0083] In another embodiment of this invention, when the mobile device is an electric heater and belongs to Class II appliances, such as Figure 6 As shown, AC power is connected through live wire 411 and neutral wire 412. Live wire 411 passes through the casing grounding terminal and tilt switch 3 in sequence and is connected to the main board. The main board acts as the control center, receiving user commands from the display panel and operation panel 46, and outputting control signals to the heating element assembly 43 and other auxiliary circuits 47. The heating element assembly 43 consists of multiple heating elements 431 connected in parallel. A self-resetting temperature limiter 44 is connected in series in its working circuit to achieve constant temperature circulation control. A non-self-resetting temperature limiter 45 is connected in parallel to provide power-off protection in case of overheating. When the product tilts, the tilt switch 3 automatically disconnects the main circuit, cuts off the power supply to the whole machine, and prevents the equipment from operating in an abnormal posture.

[0084] Specifically, Class II appliances refer to electrical equipment that not only relies on basic insulation for protection against electric shock, but also has an additional independent double insulation or reinforced insulation structure, so that user safety can be ensured without relying on grounding measures.

[0085] Specifically, the AC power supply is a standard single-phase AC power supply with power parameters of 220V / 50Hz.

[0086] Although embodiments of the present 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 present invention, and such modifications and variations all fall within the scope defined by the appended application.

Claims

1. A mobile device, characterized in that, include: The housing (1) has an installation area at its bottom, and the installation area is provided with a snap-fit ​​structure (111) and a first fixing part (112). The caster assembly (2) includes a bracket (21) and a caster unit (22); the bracket (21) includes a mounting part (211), an elastic buckle (212), and a second fixing part (213), and the caster unit (22) is mounted on the mounting part (211); the elastic buckle (212) engages with the locking structure (111); the first fixing part (112) and the second fixing part (213) are fixedly connected by a first fastener (23).

2. The mobile device according to claim 1, characterized in that, The installation area includes a recessed platform (11) located at the bottom of the housing (1).

3. The mobile device according to claim 2, characterized in that, The elastic buckle (212) includes two buckle units (2121) spaced apart, and the free end of the buckle unit (2121) is provided with an outwardly protruding hook (2122); the engaging structure (111) includes: A fastening hole (1111) is provided on the bottom wall of the recessed platform (11); Two snap-fitting ribs (1112) are located on opposite sides of the snap-fitting hole (1111); The buckle unit (2121) passes through the buckle hole (1111), and the buckle hook (2122) engages with the corresponding buckle rib (1112).

4. The mobile device according to claim 3, characterized in that, Along the extending direction of the housing (1), the fastening rib (1112) extends from the fastening hole (1111) to the side wall of the recess (11).

5. The mobile device according to claim 3, characterized in that, The bottom wall of the recessed platform (11) is also provided with a first through hole, which is opposite to and spaced apart from the fastening hole (1111); the first fixing part (112) includes a threaded post protruding from the periphery of the first through hole into the housing (1), and the threaded post is provided with a threaded connection hole. The second fixing part (213) includes a first through hole provided in the bracket (21); the first fastener (23) passes through the first through hole and the first through hole in sequence, and is threadedly connected to the threaded connection hole.

6. The mobile device according to claim 2, characterized in that, The bracket (21) is provided with a second through hole; the mounting part (211) includes a hollow column (2111) protruding upward from the periphery of the second through hole. The caster unit (22) includes a cylindrical connecting part (221); the cylindrical connecting part (221) passes through the second through hole and is connected to the hollow column (2111).

7. The mobile device according to claim 6, characterized in that, The caster unit (22) also includes a swivel wheel (222), which is rotatably mounted on the cylindrical connecting part (221).

8. The mobile device according to claim 6, characterized in that, The bottom wall of the settling platform (11) is also provided with a second through hole (113), and the hollow column (2111) passes through the second through hole (113) and is located inside the shell (1).

9. The mobile device according to any one of claims 1 to 8, characterized in that, It also includes a tilt switch (3), which is fixed to the housing (1).

10. The mobile device according to claim 9, characterized in that, The housing (1) also includes a support (12), which protrudes from the inner wall of the housing (1), and the tilt switch (3) is mounted on the support (12); And / or, the housing (1) further includes a positioning part (13), the tilt switch (3) is provided with a positioning hole (31), and the positioning part (13) is inserted into the positioning hole (31); And / or, the housing (1) further includes a third fixing part (14), the tilt switch (3) is provided with a fixing hole (32), and a second fastener (33) passes through the fixing hole (32) and is fixedly connected to the third fixing part (14).

11. The mobile device according to any one of claims 1 to 8, characterized in that, The mobile device includes an electric heater.

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