Brake Structure and Mobile Device

Abstract

The present invention belongs to the technical field of mobile devices, and discloses a braking structure and a mobile device. The braking structure includes a first rotating shaft, a pedal, a limiting post, a limiting block, and a braking component. The limiting block is provided with an annular guiding groove. The limiting post can slide unidirectionally along the annular guiding groove under the drive of the pedal. The annular guiding groove has a first limiting surface and a second limiting surface which are arranged at intervals. When the limiting post abuts against the first limiting surface, the first rotating shaft is in an unlocked state; when the limiting post abuts against the second limiting surface, the first rotating shaft is in a braking state. Two braking components are connected to both ends of the first rotating shaft. The braking components provide braking force to the rollers when the first rotating shaft is in the braking state, and move away from the rollers when the first rotating shaft is in the unlocked state. The annular guiding groove can enable the limiting post to slide unidirectionally along the annular guiding groove, avoiding the situation that the limiting rod needs to be lifted to reset the pedal, ensuring that unlocking and braking can be completed by stepping on the pedal, and improving the convenience of use.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile devices, and particularly to a braking structure and a mobile device. Background Art

[0002] For the convenience of use, rollers are usually provided on some loading devices to facilitate the movement of the materials on the loading devices. When the materials are moved to the destination, it is necessary to brake the rollers to prevent accidental movement of the loading device during the process of handling the materials.

[0003] The braking structures in the prior art usually set pedals at the rollers or axles. When braking is required, the pedals are stepped on, and the pedals provide frictional force to the rollers or axles to achieve the purpose of braking. However, when releasing the brake, the pedals need to be lifted upward, which brings inconvenience to the users.

[0004] Therefore, there is an urgent need for a braking structure and a mobile device to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a braking structure and a mobile device. The braking structure is simple in structure and can brake and unlock the rollers by stepping on the pedal, improving the convenience of use.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A braking structure, the braking structure includes:

[0008] A pedal assembly, the pedal assembly includes a first rotating shaft, a pedal, and a limiting post floatingly arranged on the pedal. The pedal is used to drive the limiting post to move and drive the first rotating shaft to rotate;

[0009] A limiting assembly, the limiting assembly includes a limiting block. The limiting block is movably arranged on the mobile device. The limiting block is provided with an annular guiding groove. The limiting post can slide unidirectionally along the annular guiding groove under the drive of the pedal. The annular guiding groove has a first limiting surface and a second limiting surface arranged at intervals. When the limiting post abuts against the first limiting surface, the first rotating shaft is in an unlocked state; when the limiting post abuts against the second limiting surface, the first rotating shaft is in a braking state;

[0010] A braking assembly, two braking assemblies are connected to both ends of the first rotating shaft. The braking assembly provides a braking force to the roller of the mobile device when the first rotating shaft is in a braking state, and the braking assembly releases the braking force on the roller when the first rotating shaft is in an unlocked state.

[0011] As an alternative technical solution, the annular guide groove includes a first limiting groove, a first guide groove, a second limiting groove, and a second guide groove that are sequentially connected. There is a boss in the middle of the annular guide groove. The limiting post can slide along the first limiting groove, the first guide groove, the second limiting groove, and the second guide groove in sequence under the drive of the pedal, and the end face of the limiting post always abuts against the bottom of the annular guide groove. The first limiting groove has a first limiting surface, and the second limiting groove has a second limiting surface. The second limiting surface is located on the side of the boss close to the second limiting groove, and both the first limiting surface and the second limiting surface are recessed upward.

[0012] As an alternative technical solution, the first guide groove gradually increases in height in the direction away from the first limiting groove. There is a first step at the connection between the end of the first guide groove and the second limiting groove, and the first step is connected to the second limiting surface; there is a second step at the connection between the second limiting groove and the second guide groove, and the second step is connected to the side of the boss close to the second guide groove. The height of the bottom of the second limiting groove is higher than the height at the starting point of the second guide groove; the second guide groove gradually increases in height in the direction close to the first limiting groove. There is a third step at the connection between the second guide groove and the first limiting groove, and the third step is connected to the side of the boss close to the first guide groove. The height of the bottom of the end of the second guide groove is higher than the height of the first guide groove, and the starting end of the first limiting groove and the first guide groove are in smooth transition.

[0013] As an alternative technical solution, the boss is arrow-shaped, and the tip of the boss points to the first limiting groove.

[0014] As an alternative technical solution, the second limiting groove further has a third limiting surface, and the third limiting surface and the second limiting surface are located on both sides of the second limiting groove.

[0015] As an alternative technical solution, the second limiting groove further has a third limiting surface, and the third limiting surface is arranged opposite to the second limiting surface.

[0016] As an alternative technical solution, a connection hole is provided on the side wall of the pedal. The limiting post passes through the connection hole, and retaining rings are arranged at both ends of the limiting post. An elastic member is arranged on the limiting post, and the elastic member is located between the side wall of the pedal and the retaining ring close to the limiting block. The elastic member is in a compressed state, and the elastic member is used to ensure that the limiting post always abuts against the bottom of the annular guide groove.

[0017] As an alternative technical solution, the pedal assembly further includes a second rotating shaft, the second rotating shaft is in transmission connection with the first rotating shaft through a transmission assembly, the pedal is used to drive the first rotating shaft and the second rotating shaft to rotate synchronously, and both ends of the second rotating shaft are connected with the braking assembly.

[0018] As an alternative technical solution, the braking assembly includes a braking wheel and a braking member. Braking wheels are fixedly provided at both ends of the first rotating shaft and both ends of the second rotating shaft. A braking member is movably arranged between the braking wheel and the roller. The pedal drives the first rotating shaft and the second rotating shaft to rotate, and further drives the braking member to provide a braking force to the roller.

[0019] As an alternative technical solution, the limiting assembly further includes a support seat, the support seat is fixedly arranged on the moving device, and the limiting block is rotatably arranged on the support seat.

[0020] The present invention also adopts the following technical solutions:

[0021] A moving device, the moving device includes the above-mentioned braking structure. The device includes a bearing seat and rollers. The four rollers are arranged around the bearing seat. The braking structure is arranged on the bearing seat and is used to brake or unlock the four rollers simultaneously. A return structure is also arranged between the pedal and the bearing seat.

[0022] The beneficial effects of the present invention:

[0023] The present invention discloses a braking structure for braking and unlocking a moving device. The braking structure includes a pedal assembly, a limiting assembly and a braking assembly. The pedal assembly includes a first rotating shaft, a pedal and a limiting column floating on the pedal. The pedal can drive the limiting column to move and drive the first rotating shaft to rotate. The limiting assembly includes a limiting block, and the limiting block is provided with an annular guiding groove. The limiting column can slide unidirectionally along the annular guiding groove under the drive of the pedal. The annular guiding groove has a first limiting surface and a second limiting surface arranged at intervals. When the limiting column abuts against the first limiting surface, the first rotating shaft is in an unlocked state; when the limiting column abuts against the second limiting surface, the first rotating shaft is in a braking state. Two braking assemblies are connected to both ends of the first rotating shaft. The braking assembly provides a braking force to the roller when the first rotating shaft is in a braking state, and the braking assembly is away from the roller when the first rotating shaft is in an unlocked state. The annular guiding groove of the limiting block can enable the limiting column to slide unidirectionally along the annular guiding groove, avoiding the situation that the limiting rod needs to be lifted to reset the pedal, ensuring that the moving device can be unlocked and braked by stepping on the pedal, and improving the use convenience of the moving device.

[0024] The present invention also discloses a moving device, which includes the above-mentioned braking structure and has strong use convenience, thereby improving work efficiency. Brief Description of the Drawings

[0025] Figure 1 is a schematic diagram of the braking structure according to Embodiment 1 of the present invention when in the unlocked state;

[0026] Figure 2 is a schematic diagram of the braking structure according to Embodiment 1 of the present invention when in the braking state;

[0027] Figure 3 is Figure 2 a partial enlarged view of A in;

[0028] Figure 4 is a schematic structural diagram of the limit block according to Embodiment 1 of the present invention;

[0029] Figure 5 is a sectional view of the limit block according to Embodiment 1 of the present invention;

[0030] Figure 6 is a schematic diagram of the position of the limit post in the annular limit groove when in the unlocked state according to Embodiment 1 of the present invention;

[0031] Figure 7 is a schematic diagram of the position of the limit post in the annular limit groove when in the braking state according to Embodiment 1 of the present invention;

[0032] Figure 8 is a schematic diagram of the position of the limit post in the annular limit groove when changing from the braking state to the unlocked state after stepping on the pedal according to Embodiment 1 of the present invention;

[0033] Figure 9 is a schematic diagram of the limit post abutting against the third limit surface when the pedal is stepped to the bottom according to Embodiment 1 of the present invention;

[0034] Figure 10 is a schematic structural diagram of the roller according to Embodiment 1 of the present invention;

[0035] Figure 11 is a schematic structural diagram of the moving device according to Embodiment 1 of the present invention Figure 1 ;

[0036] Figure 12 is Figure 11 a partial enlarged view of B in;

[0037] Figure 13 is a schematic structural diagram of the moving device according to Embodiment 1 of the present invention Figure 2 ;

[0038] Figure 14 is Figure 13 a partial enlarged view of C in;

[0039] Figure 15 is a schematic structural diagram of the moving device according to Embodiment 2 of the present inventionFigure 1 ;

[0040] Figure 16 is Figure 15 A partial enlarged view of D in

[0041] Figure 17 is a bottom view of the mobile device according to Embodiment 2 of the present invention;

[0042] Figure 18 is Figure 17 An axonometric view of the cross-sectional view of E-E in

[0043] Figure 19 is Figure 18 A partial enlarged view of F in

[0044] In the figure:

[0045] 1. Roller; 101. Mounting seat; 1011. Mounting hole; 102. Mounting sleeve; 103. Roller body; 2. Bearing seat;

[0046] 11. First rotating shaft; 12. Pedal; 121. Through groove; 13. Limit post; 131. Retaining ring; 132. Elastic member; 14. Second rotating shaft; 15. Transmission assembly; 151. Transmission sleeve; 152. Connecting rod;

[0047] 21. Limit block; 210. Annular guide groove; 211. First limit groove; 2111. First limit surface; 212. First guide groove; 2121. First step; 213. Second limit groove; 2131. Second limit surface; 2132. Second step; 2133. Third limit surface; 2134. Projection; 214. Second guide groove; 2141. Third step; 215. Boss; 22. Support seat; 23. Rotating shaft;

[0048] 30. Braking assembly; 31. Braking wheel; 32. Braking member;

[0049] 40. Return structure; 401. Torsion spring; 41. Rotating rod; 42. Slide rod; 431. Sliding sleeve; 432. Nut; 44. Return spring. Detailed implementation manners

[0050] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only parts related to the present invention rather than all structures are shown in the drawings.

[0051] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0052] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0053] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0054] Embodiment 1

[0055] Such as Figures 1 to 5As shown in the figure, this embodiment provides a braking structure for braking a mobile device. The braking structure includes a pedal assembly, a limiting assembly, and a braking assembly 30. The pedal assembly includes a first rotating shaft 11, a pedal 12, and a limiting post 13 floatingly disposed on the pedal 12. The pedal 12 is used to drive the limiting post 13 to move and drive the first rotating shaft 11 to rotate. The limiting assembly includes a limiting block 21. The limiting block 21 is movably disposed on the mobile device. The limiting block 21 is provided with an annular guiding groove 210. The limiting post 13 can slide unidirectionally along the annular guiding groove 210 under the drive of the pedal 12. The annular guiding groove 210 has a first limiting surface 2111 and a second limiting surface 2131 which are spaced apart. When the limiting post 13 abuts against the first limiting surface 2111, the first rotating shaft 11 is in an unlocked state. When the limiting post 13 abuts against the second limiting surface 2131, the first rotating shaft 11 is in a braking state. Two braking assemblies 30 are connected to both ends of the first rotating shaft 11. The braking assembly 30 provides a braking force to the roller 1 of the mobile device when the first rotating shaft 11 is in a braking state, and the braking assembly 30 releases the braking force on the roller 1 when the first rotating shaft 11 is in an unlocked state. Specifically, in this embodiment, when the limiting post 13 abuts against the first limiting surface 2111, the braking assembly 30 of the first rotating shaft 11 is in an unlocked state, and the mobile device can move normally. When it is necessary to brake the mobile device, step on the pedal 12. The limiting post 13 floatingly disposed on the pedal 12 can slide unidirectionally along the annular guiding groove 210 until it abuts against the second limiting surface 2131. The second limiting surface 2131 can provide a supporting force to the limiting post 13. During this process, the first rotating shaft 11 rotates a certain angle under the drive of the pedal 12, and when the limiting post 13 abuts against the second limiting surface 2131, the first rotating shaft 11 remains in a state of having rotated a certain angle. The braking assembly 30 at the end of the first rotating shaft 11 provides a braking force to the roller 1 of the mobile device, so that the roller 1 cannot rotate, achieving the purpose of braking the mobile device. When it is necessary to unlock the mobile device, continue to step on the pedal 12 downward. The pedal 12 is separated from the second limiting surface 2131 and slides back along the annular guiding groove 210 in the same direction until it abuts against the first limiting surface 2111, thereby driving the first rotating shaft 11 to reset. The corresponding braking assembly 30 also resets, and the braking force received by the roller 1 disappears, and the mobile device can move again. This setting can both brake the mobile device by stepping on the pedal 12 and unlock the mobile device by stepping on the pedal 12, improving the use convenience of the mobile device. Figure 1 The limiting post 13 therein is located in the first limiting groove 211 at this time. Preferably, the limiting post 13 in this embodiment is disposed at the middle position of the pedal 12 along the direction perpendicular to the first rotating shaft 11. This setting can avoid excessive wear of the limiting post 13 and the annular guiding groove 210 due to uneven force.

[0056] Optionally, as Figure 10As shown, the roller 1 in this embodiment is a central control roller, which specifically includes a mounting base 101, a mounting sleeve 102, and a roller body 103. The mounting base 101 and the mounting sleeve 102 are rotatably connected around the vertical direction, and the roller body 103 and the mounting sleeve 102 are rotatably connected around the horizontal direction. This setting enables the roller body 103 on the mounting sleeve 102 to rotate around the axis in the vertical direction relative to the mounting base 101 and also enables the roller body 103 to rotate around the horizontal axis relative to the mounting sleeve 102, ensuring that the mobile device can slide smoothly in different directions. When the braking member provides a braking force to the roller 1, the roller body 103 can neither rotate around the vertical direction nor rotate around the horizontal direction, ensuring the stability of braking.

[0057] Optionally, in this embodiment, the structure of the annular guide groove 210 is arranged such that the limit post 13 moves clockwise around the annular guide groove 210. In other embodiments, the structure of the annular guide groove 210 can also be mirror-imaged and the annular guide groove 210 can be correspondingly arranged on the other side of the pedal 12. At this time, the moving direction of the limit post 13 around the annular guide groove 210 is counterclockwise, which will not be elaborated here.

[0058] Further, the annular guide groove 210 includes a first limiting groove 211, a first guide groove 212, a second limiting groove 213, and a second guide groove 214 that are sequentially connected. There is a boss 215 in the middle of the annular guide groove 210. The limiting post 13 can slide along the first limiting groove 211, the first guide groove 212, the second limiting groove 213, and the second guide groove 214 in sequence under the drive of the pedal 12, and the end face of the limiting post 13 always abuts against the groove bottom of the annular guide groove 210. The first limiting groove 211 has a first limiting surface 2111, and the second limiting groove 213 has a second limiting surface 2131. The second limiting surface 2131 is located on the side of the boss 215 close to the second limiting groove 213, and both the first limiting surface 2111 and the second limiting surface 2131 are recessed upward. Specifically, in this embodiment, when the limiting post 13 abuts against the first limiting surface 2111, the first rotating shaft 11 is in an unlocked state; when the limiting post 13 abuts against the second limiting surface 2131, the first rotating shaft 11 is in a braking state; the braking assembly 30 is connected to the end of the first rotating shaft 11 and is used to provide a braking force to the roller 1 of the mobile device. Specifically, in this embodiment, when the limiting post 13 is located in the first limiting groove 211, a part of the side surface of the limiting post 13 contacts the groove wall of the first limiting groove 211, and the braking assembly 30 of the first rotating shaft 11 is in an unlocked state, and the mobile device can move normally. When it is necessary to brake the mobile device, step on the pedal 12, and the limiting post 13 floating on the pedal 12 slides out of the first limiting groove 211 and slides along the first guide groove 212 into the second limiting groove 213. And a part of the side surface of the limiting post 13 abuts against the second limiting surface 2131. The second limiting surface 2131 can provide a supporting force to the limiting post 13, so that the limiting post 13 is fixed in the second limiting groove 213. During this process, the first rotating shaft 11 also rotates a certain angle under the drive of the pedal 12, and when the limiting post 13 is fixed in the second limiting groove 213, the first rotating shaft 11 remains in a state of having rotated a certain angle. The braking assembly 30 at the end of the first rotating shaft 11 provides a braking force to the roller 1 of the mobile device, so that the roller 1 cannot rotate, achieving the purpose of braking the mobile device; when it is necessary to unlock the mobile device, continue to step on the pedal 12 downward. The limiting post 13 slides out of the second limiting groove 213 under the drive of the pedal 12 and slides along the second guide groove 214 to the first limiting groove 211. During this process, the pedal 12 first moves downward under the action of the stepping force, and then resets during the process of sliding from the second guide groove 214 to the first limiting groove 211 along the limiting groove, thereby driving the first rotating shaft 11 to reset. Correspondingly, the braking assembly 30 also resets, the braking force received by the roller 1 disappears, and the mobile device can move again. Both the first limiting surface 2111 and the second limiting surface 2131 are set to be recessed upward, which can ensure good support for the limiting post 13, ensure the stability of the mobile device in the braking state and the unlocked state, and can ensure that the limiting block 21 has a relatively fixed position in the braking state and the unlocked state, improving the stability.

[0059] Further, as Figures 4 to 9As shown, the first guiding groove 212 gradually increases in height along the direction away from the first limiting groove 211. At the connection of the end of the first guiding groove 212 and the second limiting groove 213, there is a first step 2121, and the first step 2121 is connected to the second limiting surface 2131; at the connection of the second limiting groove 213 and the second guiding groove 214, there is a second step 2132, and the second step 2132 is connected to the side surface of the boss 215 close to the second guiding groove 214. The height of the second limiting groove 213 is higher than the height at the starting point of the second guiding groove 214; the second guiding groove 214 gradually increases in height along the direction close to the first limiting groove 211. At the connection of the second guiding groove 214 and the first limiting groove 211, there is a third step 2141, and the third step 2141 is connected to the side surface of the boss 215 close to the first guiding groove 212. The height at the end of the second guiding groove 214 is higher than the height of the first guiding groove 212, and the starting end of the first limiting groove 211 and the first guiding groove 212 are in smooth transition.Specifically, in this embodiment, during actual use, the limiting post 13 is usually located in the first limiting groove 211. When the pedal 12 is stepped on, due to the existence of the third step 2141, and the third step 2141 is connected to the side surface of the boss 215 close to the first guiding groove 212, the limiting post 13 can only slide along the first guiding groove 212. When it slides to the junction of the second limiting groove 213 and the first guiding groove 212, since the height of the second limiting groove 213 is lower than that of the first guiding groove 212, the limiting post 13 can enter the second limiting groove 213 through the first step 2121, and can prevent the limiting post 13 from reversely returning to the first limiting groove 211 along the first guiding groove 212. And when the limiting post 13 crosses the first step 2121, the pedal 12 will vibrate accordingly. At this time, the user will release the pedal 12. Since the limiting post 13 always abuts against the bottom of the annular guiding groove 210, and the first step 2121 is connected to the second limiting surface 2131, therefore, the limiting post 13 will slide along the stepped surface of the first step 2121 to the second limiting surface 2131. The second limiting surface 2131 provides a supporting force to the limiting post 13, so that the limiting post 13 is fixed. During this process, the first rotating shaft 11 rotates by a certain angle and keeps this rotation angle unchanged, so that the braking assembly 30 continuously provides a braking force to the roller 1, so that the mobile device is braked; when it is necessary to unlock the mobile device, step on the pedal 12 downward, the limiting post 13 will slide along the second step 2132 to the second guiding groove 214, and since the second step 2132 is connected to the side surface of the boss 215 close to the second guiding groove 214, the limiting post 13 will slide along the side surface of the boss 215 located in the second guiding groove 214, and then slide from the third step 2141 to the first limiting groove 211. Since the third step 2141 has a certain height, it can prevent the limiting post 13 from moving reversely along the second guiding groove 214 when the pedal 12 is stepped on. And when the limiting post 13 crosses the third step 2141, the pedal 12 will vibrate accordingly. At this time, the user will release the pedal 12, and the limiting post 13 will abut against the first limiting surface 2111. During this period, the rotating shaft will first rotate by a certain angle, and then rotate reversely to reset, completing the unlocking of the mobile device. This setting enables the limiting post 13 to slide only in a preset direction, avoiding using other structures to guide the movement direction of the limiting post 13, streamlining the structure, effectively saving costs, reducing the weight of the mobile device, and facilitating maintenance. Specifically, the heights of the first step 2121, the second step 2132 and the third step 2141 in this embodiment are all 1 mm - 3 mm, and the first limiting groove 211 and the second limiting groove 213 are located in the same plane. In other embodiments, the first limiting groove 211 and the second limiting groove 213 are located in different planes, which will not be elaborated here.

[0060] Optionally, the boss 215 is arrow-shaped, and the tip of the boss 215 points to the first limiting groove 211. Specifically, this setting can provide a certain guiding effect on the limiting post 13, facilitating the sliding of the limiting post 13 along the first guiding groove 212. The other side of the boss 215 has a second limiting surface 2131, and the second limiting surface 2131 is recessed upward, which can ensure that the boss 215 can provide sufficient support for the limiting post 13, thereby ensuring the reliability of braking.

[0061] Furthermore, the second limiting groove 213 also has a third limiting surface 2133, and the third limiting surface 2133 and the second limiting surface 2131 are located on both sides of the second limiting groove 213. Specifically, in this embodiment, as Figure 9 shown, it is a schematic diagram of the contact between the limiting post 13 and the third limiting surface 2133 when the pedal 12 is depressed to the bottom. The setting of the third limiting surface 2133 can provide a certain support for the limiting post 13 when the pedal 12 is depressed to the bottom, and can have a certain limiting effect on the stroke of the pedal 12. Moreover, the third limiting surface 2133 in this embodiment is connected to the first step 2121, and can also provide a certain guiding effect on the limiting post 13.

[0062] Furthermore, the second limiting groove 213 is provided with a protrusion 2134, and the protrusion 2134 is arranged close to the second step 2132. Specifically, in this embodiment, the protrusion 2134 provided in the second limiting groove 213 can guide the limiting post 13, ensuring that the limiting post 13 can reach the second limiting surface 2131 and will not directly slide along the second step 2132 to the second guiding groove 214, thus ensuring the use effect.

[0063] Furthermore, a connection hole is formed in the side wall of the pedal 12, the limiting post 13 is inserted through the connection hole, and snap rings 131 are arranged at both ends of the limiting post 13. An elastic member 132 is arranged on the limiting post 13, and the elastic member 132 is located between the side wall of the pedal 12 and the snap ring 131 close to the limiting block 21. The elastic member 132 is in a compressed state, and the elastic member 132 is used to ensure that the limiting post 13 always abuts against the bottom of the annular guiding groove 210. Specifically, in this embodiment, the elastic member 132 can ensure that the limiting post 13 can always abut against the bottom of the annular guiding groove 210, ensuring the normal progress of braking and unlocking. In this embodiment, the elastic member 132 is a metal spring. In other embodiments, the elastic member 132 can also be a rubber spring, etc., which will not be elaborated here.

[0064] Further, the structure of the pedal 12 further includes a second rotating shaft 14. The second rotating shaft 14 is drivingly connected to the first rotating shaft 11 through a transmission assembly 15. The pedal 12 is used to drive the first rotating shaft 11 and the second rotating shaft 14 to rotate synchronously. The second rotating shaft 14 is also connected to a braking assembly 30. Specifically, in this embodiment, usually, the mobile device has four support wheels. The second rotating shaft 14 connected to the first rotating shaft 11 through the transmission assembly 15 is provided, and the braking assembly 30 is also connected to both ends of the second rotating shaft 14. The transmission assembly 15 can ensure that when the pedal 12 drives the first rotating shaft 11 to rotate, the second rotating shaft 14 rotates synchronously, so that the four rollers 1 of the mobile device can be braked or unlocked simultaneously, improving the braking stability of the mobile device. The transmission assembly 15 includes a transmission sleeve 151 and a connecting rod 152. The transmission sleeve 151 is fixedly arranged on the first rotating shaft 11 and the second rotating shaft 14. The connecting rod 152 is rotatably arranged on the transmission sleeve 151, which can ensure the synchronous rotation of the first rotating shaft 11 and the second rotating shaft 14.

[0065] Further, as Figure 10 shown, the braking assembly 30 includes a braking wheel 31 and a braking member 32. The braking wheels 31 are fixedly provided at both ends of the first rotating shaft 11 and both ends of the second rotating shaft 14. A braking member 32 is movably arranged between the braking wheel 31 and the roller 1. The pedal 12 drives the first rotating shaft 11 and the second rotating shaft 14 to rotate, and then drives the braking member 32 to provide a braking force to the roller 1. Specifically, in this embodiment, the braking member 32 is a brake shaft, which is perpendicular to the roller 1. The braking wheel 31 has a curved surface with a variable radius. The brake shaft is always in contact with the braking wheel 31. The first rotating shaft 11 or the second rotating shaft 14 drives the braking wheel 31 to rotate, thereby causing the brake shaft to move up and down. When the brake shaft moves downward, it provides a braking force to the roller 1. When the brake shaft moves upward, the roller 1 is unlocked. Optionally, in this embodiment, the braking wheel 31 is a cam.

[0066] Optionally, a return spring is arranged on the brake shaft, which can ensure that the brake shaft is always in contact with the cam, further improving the stability.

[0067] Further, the limiting component further includes a support base 22, which is fixedly arranged on the moving device, and the limiting block 21 is rotatably arranged on the support base 22. Specifically, in this embodiment, the support base 22 is provided with a through hole, and after the fastener passes through the through hole, the support base 22 is connected to the moving device. The limiting block 21 is rotatably connected to the support base 22 through a rotating shaft 23, enabling the limiting block 21 to rotate around the support base 22 to ensure the braking of the roller 1. In actual use, the limiting column 13 is substantially parallel to the first rotating shaft 11, and the relative distance remains substantially unchanged. Therefore, during the process of the limiting column 13 sliding along the annular guiding groove 210, the limiting block 21 needs to rotate by different angles around the rotating shaft 23 to meet the position requirements of the limiting column 13. When the braking starts, first, when the pedal 12 is stepped on, the pedal 12 drives the limiting column 13 to rotate relative to the axis of the first rotating shaft 11. The limiting column 13 slides out of the first limiting groove 2111 and rotates clockwise along the annular guiding groove 210. Then, it is required that the limiting block 21 also rotates clockwise around the rotating shaft 23 relative to the support base 22. Therefore, the rotating shaft 23 is arranged at a position to the left of the limiting block 21, enabling the rotation of the limiting block 21 to be smoother. The first step 2121, the second step 2132, and the third step 2141 are all arranged to be inclined to the left, facilitating the limiting column 13 to successively cross the first step 2121, the second step 2132, and the third step 2141. In this embodiment, the first limiting groove 2111 is close to the second guiding groove 214. When the pedal 12 is stepped on, the limiting column 13 will slide along the third step 2141, exerting a certain force on the limiting block 21, causing the limiting block 21 to rotate clockwise. Then, during the process of the limiting column 13 sliding along the first guiding groove 212, the limiting column 13 will also exert a certain force on the side wall of the first guiding groove 212, causing the limiting block 21 to rotate counterclockwise. When the pedal 12 is stepped on to the end, the limiting column 13 will contact the right side surface or the third limiting surface 2133 of the protrusion 2134, causing the limiting block 21 to rotate clockwise again. Then, when the pedal 12 is released, due to the action of the return structure 40, the limiting column 13 can reach the second limiting surface 2131 along the end surface of the first step 2121, and the limiting column 13 abuts against the second limiting surface 2131. At this time, the braking position is reached. When unlocking is required, the pedal 12 is stepped on again, and the limiting column 13 will contact the left side surface of the protrusion 2134 or the bottom groove wall of the second guiding groove, enabling the limiting column 13 to smoothly pass through the second step 2132 and enter the second guiding groove 214. Then, when the pedal 12 is released, due to the action of the return structure 40, the limiting column 13 contacts the outer side wall of the second guiding groove 214, causing the limiting block 21 to rotate clockwise. The limiting column 13 can slide along the second guiding groove 214, pass through the third step 2141, and enter the first limiting groove 211 and abut against the first limiting surface 2111, enabling the limiting block 21 to restore its original rotation angle and the moving device to restore the unlocked state.This setting can prevent a large deviation in the rotation angle of the limit block 21, ensuring that the limit post 13 can slide along a preset path and ensuring the reliability of the braking structure during use.

[0068] As Figures 11 to 14 shown, this embodiment also discloses a mobile device, including the above braking structure. The mobile device further includes a carrier seat 2 and rollers 1. The rollers 1 are arranged around the carrier seat 2. The braking structure is arranged on the carrier seat 2 and is used to brake or unlock the four rollers 1 simultaneously. A return structure 40 is also arranged between the pedal 12 and the carrier seat 2. Specifically, in this embodiment, the first rotating shaft 11 is arranged between two rollers 1, the second rotating shaft 14 is arranged between the other two rollers 1. The rollers 1 are all of hollow structure, and the braking assembly 30 is located in this hollow structure. The pedal 12 is arranged on the first rotating shaft 11. When the pedal 12 is depressed, since a transmission assembly 15 is arranged between the first rotating shaft 11 and the second rotating shaft 14, the first rotating shaft 11 and the second rotating shaft 14 rotate synchronously, driving the braking assemblies 30 on both sides of the first rotating shaft 11 and both sides of the second rotating shaft 14 to provide braking force or unlocking force to the corresponding rollers 1. In this embodiment, a return structure 40 is arranged between the pedal 12 and the carrier seat 2, which can ensure that the pedal 12 always has a tendency to return to the unlocked state. Specifically, the return structure in this embodiment is a torsion spring 401 arranged between the pedal 12 and the carrier seat 2.

[0069] Embodiment 2

[0070] As Figures 15 to 19 shown, this embodiment also discloses a mobile device. The difference between this mobile device and the mobile device in Embodiment 1 is mainly the difference in the return structure 40. The return structure 40 in this embodiment includes a rotating rod 41, a sliding rod 42, a sliding sleeve 431, a nut 432 and a return spring 44. The rotating rod 41 is rotatably arranged on the carrier seat 2. A through groove 121 is formed on the pedal 12. The sliding rod 42 is slidably arranged in this through groove 121, and the sliding rod 42 is connected to the rotating rod 41. A sliding sleeve 431 and a nut 432 are arranged at one end of the sliding rod 42 extending out of the pedal 12. The sliding sleeve 431 is slidably arranged on the sliding rod 42. The nut 432 is fixedly arranged at the end of the sliding rod 42. The return spring 44 is sleeved on the sliding rod 42 and is located between the sliding sleeve 431 and the nut 432. Specifically, in this embodiment, during actual use, when the pedal 12 is depressed, the pedal 12 moves away from the carrier seat 2, and the sliding rod 42 slides along the through groove 121 of the pedal 12, causing the pedal 12 to drive the sliding sleeve 431 to compress the return spring 44, making the return spring 44 in a compressed state and continuously providing a return elastic force to the pedal 12 to ensure that the pedal 12 can rebound normally. Preferably, the return spring 44 is also in a compressed state in the unlocked state to ensure the return elastic force on the pedal 12.

[0071] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. Braking structure, characterized in that, the braking structure includes: a pedal assembly, the pedal assembly includes a first rotating shaft (11), a pedal (12) and a limiting post (13) floatingly arranged on the pedal (12), and the pedal (12) is used to drive the limiting post (13) to move and drive the first rotating shaft (11) to rotate; a limiting assembly, the limiting assembly includes a limiting block (21), the limiting block (21) is movably arranged on a moving device, the limiting block (21) is provided with an annular guiding groove (210), the limiting post (13) can slide unidirectionally along the annular guiding groove (210) under the drive of the pedal (12), the annular guiding groove (210) has a first limiting surface (2111) and a second limiting surface (2131) arranged at intervals, when the limiting post (13) abuts against the first limiting surface (2111), the first rotating shaft (11) is in an unlocked state; when the limiting post (13) abuts against the second limiting surface (2131), the first rotating shaft (11) is in a braking state; a braking assembly (30), two braking assemblies (30) are connected to both ends of the first rotating shaft (11), the braking assembly (30) provides a braking force to the roller (1) of the moving device when the first rotating shaft (11) is in a braking state, and the braking assembly (30) releases the braking force on the roller (1) when the first rotating shaft (11) is in an unlocked state; the annular guiding groove (210) includes a first limiting groove (211), a first guiding groove (212), a second limiting groove (213) and a second guiding groove (214) connected in sequence, a boss (215) is in the middle of the annular guiding groove (210), the limiting post (13) can slide along the first limiting groove (211), the first guiding groove (212), the second limiting groove (213) and the second guiding groove (214) in sequence under the drive of the pedal (12), and the end surface of the limiting post (13) always abuts against the groove bottom of the annular guiding groove (210), the first limiting groove (211) has a first limiting surface (2111), the second limiting groove (213) has a second limiting surface (2131), the second limiting surface (2131) is located on one side of the boss (215) close to the second limiting groove (213), and both the first limiting surface (2111) and the second limiting surface (2131) are recessed upward; The first guiding groove (212) gradually increases in height along the direction away from the first limiting groove (211). At the connection between the end of the first guiding groove (212) and the second limiting groove (213), there is a first step (2121), and the first step (2121) is connected to the second limiting surface (2131); at the connection between the second limiting groove (213) and the second guiding groove (214), there is a second step (2132), and the second step (2132) is connected to the side surface of the boss (215) close to the second guiding groove (214). The height of the bottom of the second limiting groove (213) is higher than the height at the starting point of the second guiding groove (214); the second guiding groove (214) gradually increases in height along the direction close to the first limiting groove (211). At the connection between the second guiding groove (214) and the first limiting groove (211), there is a third step (2141), and the third step (2141) is connected to the side surface of the boss (215) close to the first guiding groove (212). The height of the bottom of the end of the second guiding groove (214) is higher than the height of the first guiding groove (212), wherein the first limiting groove (211) and the starting end of the first guiding groove (212) are in smooth transition; The limiting assembly further includes a support seat (22), the support seat (22) is fixedly arranged on the moving device, and the limiting block (21) is rotatably arranged on the support seat (22).

2. The braking structure according to claim 1, wherein, The second limiting groove (213) further has a third limiting surface (2133), and the third limiting surface (2133) and the second limiting surface (2131) are respectively located on both sides of the second limiting groove (213).

3. The braking structure according to claim 2, wherein, The second limiting groove (213) is provided with a protrusion (2134), and the protrusion (2134) is arranged close to the second step (2132).

4. The braking structure according to claim 1, wherein, A connection hole is formed in the side wall of the pedal (12). The limiting post (13) passes through the connection hole, and snap rings (131) are arranged at both ends of the limiting post (13). An elastic member (132) is arranged on the limiting post (13), and the elastic member (132) is located between the side wall of the pedal (12) and the snap ring (131) close to the limiting block (21). The elastic member (132) is in a compressed state, and the elastic member (132) is used to ensure that the limiting post (13) always abuts against the bottom of the annular guiding groove (210).

5. The braking structure according to claim 1, wherein, The pedal assembly further includes a second rotating shaft (14), the second rotating shaft (14) is in transmission connection with the first rotating shaft (11) through a transmission assembly (15), the pedal (12) is used to drive the first rotating shaft (11) and the second rotating shaft (14) to rotate synchronously, and both ends of the second rotating shaft (14) are connected with the braking assembly (30).

6. The braking structure according to claim 5, characterized in that the braking assembly (30) includes a brake wheel (31) and a braking member (32), brake wheels (31) are fixedly provided at both ends of the first rotating shaft (11) and both ends of the second rotating shaft (14), a braking member (32) is movably arranged between the brake wheel (31) and the roller (1), the pedal (12) drives the first rotating shaft (11) and the second rotating shaft (14) to rotate, and further drives the braking member (32) to provide a braking force to the roller (1).

7. A mobile device, characterized in that the mobile device includes the braking structure according to any one of claims 1-6, the mobile device includes a carrier seat (2) and rollers (1), the four rollers (1) are arranged around the carrier seat (2), the braking structure is arranged on the carrier seat (2) and is used to simultaneously brake or unlock the four rollers (1), and a return structure (40) is further arranged between the pedal (12) and the carrier seat (2).

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