Rotating wheel mechanism and audio and video equipment

Abstract

The utility model discloses a rotating wheel mechanism and audio and video equipment, and belongs to the technical field of belt wheel equipment. The rotating wheel mechanism comprises a wheel frame, a rotating wheel, a driving piece, a brake rod and a reset piece, the rotating wheel mechanism is installed on the equipment main body of the audio and video equipment, and the rotating wheel is located at the bottom of the equipment main body, so that the audio and video equipment can be moved in modes of pushing, pulling, dragging and the like and can be easily moved to a target site; the use is more flexible. Moreover, the position of the driving piece can be controlled by a user to control the brake rod to move, so that the brake rod is inserted into or withdrawn from the rotating wheel locking groove to lock and brake the rotating wheel, or the rotating wheel can rotate freely. And under the condition that the rotating wheel is locked and braked by the brake rod, the audio and video equipment can be more stably parked at the current position, is not easy to slide and is safer.

Description

Technical Field

[0001] The utility model relates to the technical field of pulley equipment, in particular to a rotating wheel mechanism and audio and video equipment. Background Art

[0002] Audio and video equipment is a general term for both audio and video equipment, and is typically capable of at least audio or video processing and playback. These devices are typically used in entertainment, education, conferences, and other settings, and can be used indoors or outdoors to provide audiovisual enjoyment and information transmission.

[0003] In the related art, audio and video equipment is generally fixed in place. If users need to use audio and video equipment in different places, they can only carry small portable audio and video equipment. However, the audio-visual effects of portable equipment are limited and cannot meet higher audio-visual needs. Utility Model Content

[0004] The purpose of the embodiment of the present utility model is to provide a rotating wheel mechanism and an audio and video device. The rotating wheel mechanism is installed on the device body, and the audio and video device is easy to move and quick and convenient to use. Moreover, the rotating wheel of the device can be braked or released by controlling the position of the driving part, which is more practical.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A rotating wheel mechanism is used to be installed on the device body of the audio and video device;

[0007] The rotating wheel mechanism includes a wheel frame, a rotating wheel, a driving member, a brake lever and a reset member;

[0008] The rotating wheel is rotatably connected to the wheel frame, the driving member is rotatably connected to the wheel frame, the brake lever is arranged between the rotating wheel and the driving member, and the brake lever is slidably connected to the wheel frame;

[0009] A driving surface is provided on one side of the driving member close to the rotating wheel, a locking groove is provided on one side of the rotating wheel close to the driving member, a first end of the brake lever abuts against the driving surface, and a second end of the brake lever is used to be inserted into or out of the locking groove;

[0010] The driving member can be rotated relative to the wheel frame under the action of an external force to adjust between a first position and a second position. When the driving member is in the first position, the second end of the brake lever disengages the locking groove, separating the brake lever from the rotating wheel. During the rotation of the driving member from the first position to the second position, the driving surface drives the brake lever to slide toward the rotating wheel. When the driving member is in the second position, the end of the brake lever facing away from the driving member inserts into the locking groove to restrict the rotation of the rotating wheel. By rotating the driving member between the two positions, the position of the brake lever can be controlled, thereby allowing the brake lever to lock or unlock the rotating wheel. When the rotating wheel device is installed on the device body, the device can be easily pushed when needed or stably parked, ensuring device safety.

[0011] Optionally, a guide hole is provided inside the wheel frame, the guide hole is located between the driving member and the rotating wheel, the guide hole has an inner opening at one end close to the driving member, and has an outer opening at one end close to the rotating wheel;

[0012] The brake lever is slidably mounted within the guide hole, with the first end of the lever extending from the inner opening and abutting against the drive surface. When the drive member is in the second position, the second end of the lever extends from the outer opening and engages the locking groove. This internal placement of the brake lever ensures longevity and reliability.

[0013] Optionally, the driving member includes a rotating portion and a treading portion, the rotating portion is used to connect with the wheel frame, and the treading portion is used to provide a force application position;

[0014] The wheel frame is internally provided with a mounting groove and a clearance notch communicating with the mounting groove. The rotating unit is disposed within the mounting groove and is rotationally connected to the wheel frame, while the pedal unit extends out of the wheel frame through the clearance notch. The main body of the driving member is internally disposed, thereby enhancing lifespan and reliability.

[0015] Optionally, a reset member is provided between the brake lever and the wheel frame, and the reset member is an elastic member;

[0016] The brake lever includes a rod body and a limiting convex portion, which protrudes relative to the outer periphery of the rod body; the elastic member is arranged on the side of the limiting convex portion away from the driving member, one end of the elastic member abuts against the limiting convex portion, and the other end abuts against the wheel frame.

[0017] Optionally, a raised arc-shaped boss is provided on a surface of the driving member close to the rotating wheel, the arc-shaped boss extends from a first end to a second end thereof in a direction surrounding the connecting axis of the driving member, and a raised height of the first end of the arc-shaped boss is smaller than a raised height of the second end of the arc-shaped boss;

[0018] The driving surface is a surface of the arc-shaped boss close to a side of the rotating wheel, and the first end of the brake rod abuts against the arc-shaped boss.

[0019] Optionally, the wheel frame includes a first frame portion and a second frame portion, the rotating portion is sandwiched between the first frame portion and the second frame portion, and the first frame portion is connected to the second frame portion;

[0020] The mounting groove includes a first groove portion arranged on the side of the first frame portion close to the second frame portion, and also includes a second groove portion arranged on the side of the second frame portion close to the first frame portion; a part of the rotating part is arranged in the first groove portion, and the other part is arranged in the second groove portion.

[0021] Optionally, the rotating wheel is rotatably mounted on the wheel frame via a connecting shaft;

[0022] The connecting shaft includes a first shaft portion and a second shaft portion, and the wheel frame includes a first frame portion and a second frame portion; the first shaft portion is clamped between the first frame portion and the second frame portion, and the first shaft portion is connected to the first frame portion or the second frame portion through a fastener; the rotating wheel sleeve is arranged outside the second shaft portion and is rotatably connected to the second shaft portion.

[0023] Optionally, a first mounting groove is provided on a side of the first frame portion close to the second frame portion, and a second mounting groove is provided on a side of the second frame portion close to the first frame portion; a portion of the first shaft portion is inserted into the first mounting groove, and a portion of the first shaft portion is inserted into the second mounting groove;

[0024] The first shaft portion is connected to the first frame portion via a fastener, or the first shaft portion is connected to the second frame portion via a fastener.

[0025] Optionally, the rotating wheel and the wheel frame are spaced apart, and the rotating wheel is rotatably connected to the wheel frame through a connecting shaft; a decorative shell is provided between the rotating wheel and the wheel frame, the decorative shell is provided with a shell through hole, and the connecting shaft is passed through the shell through hole; a locking groove is provided on the side of the rotating wheel close to the wheel frame, and the locking groove is connected to the shell through hole. When the driving member is in the second position, the second end of the brake rod passes through the shell through hole and is inserted into the locking groove.

[0026] Optionally, a circle of locking grooves is provided on a side of the rotating wheel close to the driving member; and / or, rotating wheels are provided at both ends of the wheel frame.

[0027] An audio and video device comprises a device body and a rotating wheel mechanism as described above, wherein the wheel frame is connected to the device body.

[0028] The beneficial effects of the present invention are as follows: the rotating wheel mechanism is installed behind the device body of the audio and video device, and the rotating wheel is located at the bottom of the device body, so that the audio and video device can be moved by pushing, pulling, dragging, etc., so that the audio and video device can be easily moved to the target site, and the use is more flexible.

[0029] Furthermore, the user can control the position of the drive member to control the movement of the brake lever, allowing the brake lever to be inserted into or removed from the rotating wheel locking slot to lock and brake the rotating wheel, or allow the rotating wheel to rotate freely. When the rotating wheel is locked and braked by the brake lever, the audio and video equipment can be more stably parked in the current position, less likely to slide, and more securely. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0031] Figure 1 This is a top view of the rotating wheel mechanism according to an embodiment of the present utility model;

[0032] Figure 2 for Figure 1 AA section view in;

[0033] Figure 3 for Figure 2 A magnified view of part A in FIG;

[0034] Figure 4 for Figure 2 A magnified view of part B in FIG;

[0035] Figure 5 This is a rear side view of the rotating wheel mechanism according to an embodiment of the present utility model;

[0036] Figure 6 This is one of the exploded schematic diagrams of the rotating wheel mechanism according to an embodiment of the present utility model;

[0037] Figure 7 for Figure 6 Enlarged view of part C in ;

[0038] Figure 8 This is the second exploded schematic diagram of the rotating wheel mechanism according to the embodiment of the present utility model;

[0039] Figure 9 for Figure 8 Enlarged view of part D in FIG;

[0040] Figure 10 for Figure 8 Enlarged view of part E in FIG;

[0041] Figure 11 for Figure 8 Enlarged view of part F in ;

[0042] Figure 12 for Figure 8 The enlarged view of the G part in the figure;

[0043] Figure 13 This is one of the structural diagrams of the audio and video equipment described in the embodiment of the present utility model;

[0044] Figure 14 This is the second structural diagram of the audio and video equipment according to the embodiment of the present utility model;

[0045] Figure 15 This is the third structural diagram of the audio and video equipment described in the embodiment of the present utility model.

[0046] In the figure: 100, rotating wheel mechanism; 200, device body; 210, speaker box; 220, pull rod; 230, display device; 300, fixed support leg; 10, wheel frame; 20, rotating wheel; 30, driving member; 1102, guide hole; 11021, first hole section; 11022, second hole section; 1103, mounting slot; 1104, avoidance notch; 11051, first mounting slot; 11052, second mounting slot; 11. Horizontal frame; 111. First frame portion; 112. Second frame portion; 12. Vertical frame; 121. Rotating connecting portion; 201. Locking groove; 31. Rotating portion; 32. Pedal portion; 34. Arc-shaped boss; 341. Driving surface; 51. Brake lever; 52. Reset member; 511. Rod body; 512. Limiting protrusion; 60. Connecting shaft; 61. First shaft portion; 62. Second shaft portion; 70. Decorative shell; 701. Shell through hole; 80. Bearing. DETAILED DESCRIPTION

[0047] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

[0048] In the description of this utility model, unless otherwise expressly specified or limited, the terms "connected" and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0049] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0050] Audio and video equipment refers to devices with audio functions, video functions, or both. In related technologies, audio and video equipment is generally fixed. If users need to use audio and video equipment in different locations, they can only carry small portable audio and video equipment. However, the audio and video effects of portable equipment are limited and cannot meet higher audio and video needs.

[0051] Just as an example, for audio equipment that is similar in size to or slightly smaller than a bedside table (such as a square dance audio system), if the audio equipment is fixed in the first position, but the user needs to use the audio equipment in the second position, the user may consider that it is difficult to lift and move the audio equipment, so he can only carry a small Bluetooth speaker to the second position for use. However, the user will face the difficulty that the use experience of a small, portable, and portable Bluetooth speaker cannot meet higher audio-visual requirements.

[0052] To address the inconvenience of moving audio equipment, the inventors considered adding rotating wheels to the equipment to facilitate its movement. However, the inventors subsequently discovered that, although rotating wheels can be used to move the equipment by pulling, dragging, or pushing, the equipment may easily slip and slide away when parked. For example, if the equipment is parked on a slope, the user may release the device, causing it to slide away. Alternatively, if the equipment is placed on a transport vehicle, the device may easily slide on the vehicle.

[0053] As for audio and video equipment, there are many electronic components and modules inside. If the audio and video equipment accidentally slides and falls over or collides with an obstacle, the electronic components inside the equipment may be damaged or fail, causing the audio and video equipment to malfunction or be damaged.

[0054] Based on this, please refer to Figures 1 to 12 The present application provides a rotating wheel mechanism 100, which is used to be installed on the device body 200 of the audio and video device, so that the audio and video device has the advantage of being easy to move and transfer, and is convenient to use.

[0055] When the rotating wheel mechanism 100 is in use, the user can adjust the position of the driving member 30 to adjust the position of the brake lever 51, so that the brake lever 51 locks or unlocks the rotating wheel 20, thereby putting the rotating wheel 20 in a brake state (non-rotatable state) or in a freely rotatable state.

[0056] Refer to the figure to Figures 13 to 15 The present application also provides an audio and video device. When the rotating wheel 20 is in a freely rotatable state, the user can easily move the audio and video device by pulling or pushing the device, making the use of the audio and video device more convenient and flexible. For example, for audio and video equipment used in school, a physical education teacher can pull the audio and video equipment from the equipment room to the playground and play radio gymnastics background music on the playground, so that students can practice radio gymnastics. For another example, square dance enthusiasts can pull the audio and video equipment from home to the square and play music in the square.

[0057] Furthermore, the driving member 30 can be set at a lower position and configured as a foot pedal. In this way, the user can control the position of the driving member 30 with his feet. The user can control the state of the rotating wheel 20 without bending over, which greatly improves the user experience.

[0058] Please continue to refer to Figures 1 to 15 , the rotating wheel mechanism 100 and the audio and video equipment using the same are described.

[0059] The rotating wheel mechanism 100 is used to be installed on the device body 200 of the audio and video device so that the audio and video device can be easily pushed or pulled based on the rotating wheel 20 at the bottom.

[0060] The rotating wheel mechanism 100 includes a wheel frame 10, a rotating wheel 20, a drive member 30, and a wheel control assembly. The rotating wheel 20 is rotatably connected to the wheel frame 10 and supports the device body 200. The rotating wheel 20 also rotates due to ground friction when the audio and video equipment needs to be moved, reducing resistance to ground movement and facilitating its movement.

[0061] The audio and video device includes a device body 200 and a rotating wheel mechanism 100, a wheel frame 10 is connected to the device body 200, and the rotating wheel mechanism 100 is installed on the device body 200 through the wheel frame 10. For example, the device body 200 of the audio and video device is a box structure, and the rotating wheel mechanism 100 is installed in the box structure. Figure 13 、 Figure 14 、 Figure 15 The rotating wheel 20 is at least partially located at the bottom of the device body 200 so that the rotating wheel 20 can contact the ground.

[0062] The driving member 30 is rotatably connected to the wheel frame 10. Under the action of an external force, the driving member 30 can move relative to the wheel frame 10, thereby adjusting the driving member 30 between a first position and a second position. The driving member 30 is used to control the wheel control assembly, which is used to lock or unlock the rotating wheel 20. When the wheel control assembly locks the rotating wheel 20, the rotating wheel 20 is braked and cannot rotate. When the wheel control assembly unlocks the rotating wheel 20, the rotating wheel 20 is unlocked and can rotate freely.

[0063] The wheel control assembly includes a brake lever 51 and a reset member 52. Correspondingly, the driving member 30 and the rotating wheel 20 are spaced apart, and the brake lever 51 is arranged between the driving member 30 and the rotating wheel 20. The brake lever 51 is slidably connected to the wheel frame 10 and can move between the driving member 30 and the rotating wheel 20. Figure 3 、 Figure 7 、 Figure 9 A driving surface 341 is provided on the side of the driving member 30 close to the rotating wheel 20. A reset member 52 is provided between the brake lever 51 and the wheel frame 10. The reset member 52 may be, but is not limited to, an elastic member. The brake lever 51 abuts against the driving surface 341 under the action of the reset member 52. The driving surface 341 extends around the connecting axis 60 of the driving member 30. During the rotation of the driving member 30 between the first position and the second position, the distance between the driving surface 341 and the rotating wheel 20 gradually increases or decreases, thereby adjusting the position of the brake lever 51. Figure 4 、 Figure 10 A locking groove 201 is provided on one side of the rotating wheel 20 close to the driving member 30 , and the locking groove 201 is used for inserting the brake lever 51 to limit the rotation of the rotating wheel 20 .

[0064] The driving member 30 can be rotated relative to the wheel frame 10 under the action of an external force to adjust between a first position and a second position. For example, the user can step down on the driving member 30 with their foot to rotate the driving member 30 to the second position, which is lowered. Alternatively, the user can gently lift the driving member 30 with their toes or instep to rotate the driving member 30 to the first position, which is uppered.

[0065] Figure 5 In the embodiment, the driving member 30 is located at the first position. When the driving member 30 is located at the first position, refer to Figure 4, the brake rod 51 is separated from the rotating wheel 20, and the brake rod 51 is not inserted into the locking groove 201 of the rotating wheel 20, that is, the brake rod 51 is out of the locking groove 201 of the rotating wheel 20, and the rotating wheel 20 can rotate freely. In the process of the driving member 30 rotating from the first position to the second position, the driving surface 341 drives the brake rod 51 to slide in the direction close to the rotating wheel 20. When the driving member 30 is in the second position (not shown in the figure), the end of the brake rod 51 away from the driving member 30 is inserted into the locking groove 201, and the brake rod 51 and the groove wall of the locking groove 201 are abutted to achieve a limited fit, thereby limiting the rotation of the rotating wheel 20 by the brake rod 51, and achieving braking of the rotating wheel 20. It should be noted that the drawings in the specification of this application all illustrate the state when the driving member 30 is in the first position.

[0066] In general, when the driving member 30 is located at the first position, the rotating wheel 20 is in an unlocked state and can rotate freely; when the driving member 30 is located at the second position, the rotating wheel 20 is in a braked state and cannot rotate freely.

[0067] The rotating wheel mechanism 100 and the audio and video equipment of the present application are based on the rotating wheel 20 in the rotating wheel mechanism 100, which facilitates pulling or pushing the device body 200 of the audio and video equipment, making it more convenient and flexible to use and less restricted by the site. The rotating wheel mechanism 100 of the present application is provided with a brake lever 51, which facilitates the braking of the device by inserting the brake lever 51 into the locking groove 201 of the rotating wheel 20 when the device is stationary. When the device is stationary, it can be parked stably and is not easy to slide away. It is convenient and reliable to use. The rotating wheel mechanism 100 of the present application is based on the cooperation between the driving surface 341 of the driving member 30 and the reset member 52. The position of the driving member 30 can be controlled to allow the brake lever 51 to move horizontally to the left and right, thereby controlling the rotating wheel 20. It is easy to operate, does not require bending over, and has a good user experience.

[0068] For example, the audio and video equipment of the present application can be used when the public needs to dance in the square. The user can control the rotating wheel 20 through the driving member 30 to allow the rotating wheel 20 to rotate freely, and then drag the audio and video equipment to the square more easily. Compared with the method of carrying, this method of moving the audio and video equipment is easier. After reaching the target position in the square, the driving member 30 is stepped on again to control the rotating wheel 20 to lock. At this time, the rotating wheel 20 cannot rotate freely, the friction between the entire device and the ground is greater, and the device can be kept more stably in the current position. At this time, the user can use the audio and video equipment to play music.

[0069] It should be noted that the audio and video equipment of the present application is also suitable for stable parking in places with a certain slope because the rotating wheel 20 has a brake locking function. It has a wider range of usage scenarios and high practicality.

[0070] It should be noted that after the user steps on the driving member 30 to lock the rotating wheel 20, even if the user releases the driving member 30, the driving member 30 remains in the second position. Because the brake lever 51 is stuck between the driving surface 341 and the rotating wheel 20, the brake lever 51 can remain inserted into the locking groove 201, keeping the rotating wheel 20 in the brake state. When the user needs to move the audio and video equipment again, the position of the driving member 30 is adjusted again to move it toward the first position, gradually increasing the distance between the rotating wheel 20 and the driving surface 341 of the driving member 30. At this time, the brake lever 51 can be moved away from the rotating wheel 20 under the action of the reset member 52 and guided by the driving surface 341 until the brake lever 51 is disengaged from the locking groove 201 of the rotating wheel 20, and the rotating wheel 20 can rotate freely.

[0071] In one embodiment, referring to Figure 2 、 Figure 6 、 Figure 14 The rotating wheel mechanism 100 is a double-wheel mechanism, and rotating wheels 20 are provided at both ends of the wheel frame 10. When the wheel frame 10 is installed on the equipment body 200, the two rotating wheels 20 are spaced apart along the left and right directions, and the connecting axis 60 line of the two rotating wheels 20 extends along the left and right directions. When moving the audio and video equipment, the two rotating wheels 20 on the left and right sides of the rotating wheel mechanism 100 rotate, and the moving process of the audio and video equipment is more stable and easy.

[0072] Optionally, the bottom of the device body 200 of the audio and video device is further provided with a fixed support foot 300, the support foot is located at a front position, and the rotating wheel 20 is located at a rear position. Figure 13 Schematic diagram), the driving member 30 can be controlled to brake the rotating wheel 20. When the rotating wheel 20 is in the brake state, the front bottom portion of the device body 200 is supported by the fixed support leg 300, and the rear bottom portion of the device body 200 is supported by the braked rotating wheel 20 that cannot roll freely forward and backward. The device body 200 is parked stably and is not prone to accidental sliding, thereby improving the safety of the device.

[0073] In other embodiments, the rotating wheel mechanism 100 may also be a single-wheel mechanism, with a rotating wheel 20 rotatably mounted in the middle of the wheel frame 10 .

[0074] In one embodiment, a locking groove 201 (eg, Figure 10(see schematic diagram), that is, multiple locking grooves 201 are provided on the inner side of the rotating wheel 20. It is understood that by providing a circle of locking grooves 201, the rotating wheel 20 can have a suitable locking groove 201 aligned with the brake lever 51 at any angle. When braking is required, the second end of the brake lever 51 can be inserted into any locking groove 201. In this way, when braking is required, there is no need to first adjust the angle of the rotating wheel 20 and then control the brake lever 51 through the driving member 30, making operation more convenient and quick, and providing a better user experience.

[0075] Of course, in other embodiments, only one to four locking grooves 201 may be provided on the rotating wheel 20 , and corresponding marks may be provided on the rotating wheel 20 . When braking is required, the user first adjusts the angle of the rotating wheel 20 and then controls the brake lever 51 to brake.

[0076] In one embodiment, please refer to Figures 2 to 4 The brake lever 51 is arranged inside the wheel frame 10, which can effectively prevent dust, protect the brake lever 51 from being worn, provide a reliable brake control function, and improve the reliability and life of the brake lever 51. Figure 1 、 Figure 5 , the brake lever 51 cannot be seen from the outside of the rotating wheel mechanism 100.

[0077] Optionally, refer to Figure 2 、 Figure 3 、 Figure 4 、 Figure 7 、 Figure 11 The wheel frame 10 is provided with a guide hole 1102 inside, and the guide hole 1102 is located between the driving member 30 and the rotating wheel 20. The guide hole 1102 has an inner opening at one end close to the driving member 30, so that the first end of the brake rod 51 can extend out of the guide hole 1102 from the inner opening, so that the first end can abut against the driving surface 341 at the end of the driving member 30. The guide hole 1102 has an outer opening at one end close to the rotating wheel 20, so that when the rotating wheel 20 needs to be braked, the second end of the brake rod 51 can extend out of the outer opening and be inserted into the locking groove 201 next to it, thereby braking the rotating wheel 20. Figure 4 When the middle driving member 30 is in the first position, the brake rod 51 extends out of the outer opening but is not inserted into the locking groove 201 .

[0078] For example, referring to Figure 2 The wheel frame 10 is provided with rotating wheels 20 on the left and right sides, and the driving member 30 is located between the rotating wheels 20 on the left and right sides. The wheel frame 10 is provided with guide holes 1102 on the left and right sides of the driving member 30, and the guide holes 1102 extend in the left and right directions.

[0079] The inventors considered providing a protruding slider directly on the bottom of the wheel frame 10, with a portion of the brake lever 51 slidingly mounted on the slider, while the remaining portion was exposed and located outside the wheel frame 10. However, the inventors found that if the brake lever 51 was positioned low, most of it would be exposed and close to the ground when the device was in use, making it susceptible to being bumped, entangled, damaged, or stuck, resulting in unreliable braking. In this embodiment, a guide hole 1102 is provided directly within the wheel frame 10, with openings at both ends of the guide hole 1102 near the drive member 30 and the rotating wheel 20. This not only allows the brake lever 51 to be mounted inside the wheel frame 10, protecting it and improving its reliability and lifespan, but also ensures stable coordination between the drive member 30, the brake lever 51, and the rotating wheel 20, resulting in a stable and reliable braking function.

[0080] Optionally, the guide hole 1102 is set to deviate from the connection axis 60 line of the driving member 30 and the connection axis 60 line of the rotating wheel 20.

[0081] In one embodiment, referring to Figure 2 、 Figure 3 、 Figures 6 to 8 The main part of the driving member 30 is arranged inside the wheel frame 10, and the position where the driving member 30 is rotatably connected to the wheel frame 10 is located inside the wheel frame 10, which can effectively prevent dust, reduce wear and tear at the connection position between the driving member 30 and the wheel frame 10, and avoid jamming at this position, thereby improving the smoothness and reliability of the control of the driving member 30, extending the service life of the driving member 30, and achieving the advantages of firmness and durability. Figure 1 、 Figure 5 , viewed from the outside of the rotating wheel mechanism 100, the position where the driving member 30 is rotatably connected to the wheel frame 10 cannot be seen.

[0082] Optionally, the driving member 30 includes a rotating part 31 and a pedal part 32. The rotating part 31 is the main part of the driving member 30. The rotating part 31 is used to be rotatably connected to the wheel frame 10. The rotating part 31 is also used to cooperate with the brake lever 51. The pedal part 32 is used to increase the force application position to facilitate the user to control the pedal part 32 with his feet and then control the entire driving member 30.

[0083] Optionally, refer to Figure 6 、 Figure 7 The treading portion 32 protrudes relative to the radial outer peripheral surface of the rotating portion 31.

[0084] Optionally, refer to Figure 6 、 Figure 7 The rotating portion 31 is cylindrical and the stepping portion 32 is plate-shaped.

[0085] The wheel frame 10 is provided with a mounting groove 1103. The rotating portion 31 is disposed within the mounting groove 1103 and is rotatably connected to the wheel frame 10. For example, the left and right ends of the rotating portion 31 are rotatably mounted to the left and right walls of the mounting groove 1103, respectively. Rotating wheels 20 are provided on both the left and right sides of the rotating portion 31. Brake levers 51 are provided between the rotating portion 31 and the left rotating wheel 20, and between the rotating portion 31 and the rotating wheel 20, respectively. A driving surface 341 is provided on the left and right end surfaces of the rotating portion 31, respectively. The left and right driving surfaces 341 abut against the left and right brake levers 51, respectively. By inserting the rotating portion 31 into the mounting groove 1103 within the wheel frame 10, the location where the rotating portion 31 is rotatably connected to the walls of the mounting groove 1103 is located within the wheel frame 10. This makes the rotatable connection between the driving member 30 and the wheel frame 10 less susceptible to damage, and the driving member 30 rotates smoothly and reliably, thereby ensuring reliable braking.

[0086] Optionally, the guide hole 1102 is arranged between the mounting groove 1103 and the rotating wheel 20, and the inner opening of the guide hole 1102 is located on the groove wall of the mounting groove 1103, so that the guide hole 1102 is connected with the mounting groove 1103 through the inner opening, so that the first end of the brake rod 51 can pass through the inner opening and extend into the mounting groove 1103 to abut and cooperate with the driving surface 341 at the end of the rotating part 31 of the driving member 30.

[0087] Continue to refer to Figure 5 The pedal portion 32 extends out of the wheel frame 10 through the avoidance notch 1104, thereby allowing a portion of the driver 30 to be exposed from the wheel frame 10, providing a position for the user's foot to apply external force, making it convenient for the user to control the position of the driver 30 by stepping on or lightly lifting the driver 30. It will be understood that the avoidance notch 1104 also provides a movement avoidance for the pedal portion 32.

[0088] In one embodiment, referring to Figure 3 、 Figure 7 、 Figure 9 A reset member 52 is provided between the brake lever 51 and the wheel frame 10. The reset member 52 is used to keep the end of the brake lever 51 facing away from the rotating wheel 20 against the driving surface 341. When the driving member 30 moves from the second position to the first position, the reset member 52 drives the second end of the brake lever 51 out of the locking groove 201, thereby unlocking the rotating wheel 20 from the brake lever 51, allowing the rotating wheel 20 to rotate freely and making it easier for the user to push the device.

[0089] Optionally, the reset member 52 is an elastic member, such as a spring, and the elastic force of the elastic member maintains the first end of the brake lever 51 against the driving surface 341 of the driver 30. In other embodiments, the reset member 52 is a magnet, and the brake lever 51 is maintained against the driving surface 341 of the driver 30 through magnetic attraction or repulsion. The following description will continue using the reset member 52 as an example.

[0090] Under user control, as the driver 30 rotates from the first position to the second position, the distance between the driving surface 341 at the end of the driver 30 and the rotating wheel 20 decreases. The driving surface 341 pushes the brake lever 51 toward the rotating wheel 20 until the second end of the brake lever 51 enters the locking groove 201, thereby braking the rotating wheel 20. During this process, the reset member 52 accumulates a reset force. It will be appreciated that even when the driver 30 is in the second position and the user's foot is removed from the driver 30, the brake lever 51 remains inserted into the locking groove 201 of the rotating wheel 20, thereby braking the rotating wheel 20. Under user control, as the driver 30 rotates from the second position to the first position, the distance between the driving surface 341 and the rotating wheel 20 increases. The reset force of the reset member 52 maintains the brake lever 51 against the driving surface 341, thereby allowing the brake lever 51 to move away from the rotating wheel 20 and disengage the second end of the brake lever 51 from the locking groove 201, thereby unlocking the rotating wheel 20.

[0091] In this embodiment, by providing a reset member 52, the reset member 52 can cooperate with the driving surface 341 of the driving member 30 to achieve the process of switching the driving member 30 between two positions, controlling the brake lever 51 to move back and forth to brake or unlock the rotating wheel 20. After the reset member 52 is provided, the complex structural design of the driving member 30 is avoided.

[0092] Optionally, the reset member 52 is an elastic member, for example, the reset member 52 is a spring.

[0093] Optionally, refer to Figure 3 The brake lever 51 includes a rod body 511 and a limiting protrusion 512. The limiting protrusion 512 protrudes relative to the outer periphery of the rod body 511. An elastic member is provided on the side of the limiting protrusion 512 facing away from the driving member 30. One end of the elastic member abuts against the limiting protrusion 512, and the other end abuts against the wheel frame 10. In this way, when the driving member 30 rotates from the first position to the second position, the driving surface 341 at the end of the driving member 30 rotates accordingly, and the raised position of the driving surface 341 abuts against the brake lever 51 and moves in the direction close to the rotating wheel 20 (during this process, Figure 3 The brake lever 51 will move to the left in the figure), so that the limiting protrusion compresses the elastic member and continues the elastic force. During the process of the driving member 30 rotating to the first position, the elastic force of the elastic member acts on the limiting protrusion, pushing the brake lever 51 to move away from the rotating wheel 20 (during this process, Figure 3 The brake lever 51 will move to the right in the figure).

[0094] Optionally, the elastic member is a spring, which is sleeved outside the rod body 511 of the brake rod 51, and the installation is reliable and stable.

[0095] Optionally, refer to Figure 2 、 Figure 3The elastic member and the limiting protrusions of the brake lever 51 are both positioned closer to the side of the driver 30, thereby shortening the distance between the elastic member and the driver 30. The elastic force of the elastic member acts on the brake lever 51, keeping the brake lever 51 in contact with the driving surface 341 at the end of the driver 30. The closer the elastic member is to the driver 30, the more stable its control over the brake lever 51. Thus, as the driver 30 moves toward the first position, the brake lever 51 can be efficiently driven by the elastic member, moving away from the rotating wheel 20 while remaining in contact with the driving surface 341 of the driver 30.

[0096] Optionally, refer to Figure 2 、 Figure 3 The guide hole 1102 includes a first hole section 11021 and a second hole section 11022. The first hole section 11021 is located on the side of the second hole section 11022 close to the driving member 30. The aperture of the first hole section 11021 is larger than the aperture of the second hole section 11022. The brake rod 51 is passed through the first hole section 11021 and the second hole section 11022. The elastic member is arranged in the first hole section 11021. The first end of the elastic member abuts the limiting protrusion of the brake rod 51, and the second end of the elastic member abuts the groove surface in the first hole section 11021 facing the driving member 30. By positioning the elastic member within the guide hole 1102, the elastic member's position is restricted by the wall of the guide hole 1102, making it less likely to loosen or shift. This allows the elastic member to operate stably, driving the brake lever 51 off the rotating wheel 20 during movement of the driving member 30 to the first position. Furthermore, the elastic member is positioned within the first hole section 11021 of the guide hole 1102, located near the driving member 30. This creates a close proximity between the elastic member and the driving surface 341 of the driving member 30, allowing the brake lever 51 to be more stably held against the driving surface 341. In other embodiments, the elastic member may also be positioned outside the guide hole 1102.

[0097] In one embodiment, referring to Figure 3 、 Figure 7 、 Figure 9 The driving member 30 has a raised arcuate boss 34 on the side closest to the rotating wheel 20. The arcuate boss 34 serves as a driving portion for engaging with the brake lever 51. The arcuate boss 34 extends from its first end to its second end along a line surrounding the connecting axis 60 of the driving member 30. The raised height of the first end of the arcuate boss 34 is less than the raised height of the second end of the arcuate boss 34. The driving surface 341 is the surface of the arcuate boss 34 on the side closest to the rotating wheel 20. The first end of the brake lever 51 abuts against the arcuate boss 34.

[0098] When the driver 30 is in the first position, the driving surface 341 at the first end of the arcuate boss 34 abuts the brake lever 51, separating the brake lever 51 from the rotating wheel 20 and allowing the rotating wheel 20 to rotate freely. When the driver 30 is in the second position, the driving surface 341 at the second end of the arcuate boss 34 abuts the brake lever 51, inserting the brake lever 51 into the locking groove 201 of the rotating wheel 20, locking the rotating wheel 20 and preventing it from rotating freely. By adjusting the curvature difference between the first and second ends of the arcuate boss 34, the angle of the driver 30 in the first and second positions can be adjusted.

[0099] In this embodiment, the arc-shaped boss 34 at the end of the driving member 30 provides a driving surface 341, which can switch between the first position and the second position of the driving member 30 and control the reciprocating movement of the brake lever 51 during the process of the driving member 30 rotating a certain angle.

[0100] Optionally, the driving member 30 includes the rotating portion 31 and the pedal portion 32 of the aforementioned embodiment. The rotating portion 31 is rotatably connected to the wheel frame 10, and the pedal portion 32 is used to increase the user's force to control the position of the driving member 30. The rotating portion 31 is cylindrical or approximately cylindrical, and the arc-shaped boss 34 is provided on the end surface of the rotating portion 31.

[0101] In one embodiment, the driving surface 341 is an arc-shaped surface. In other embodiments, the driving surface 341 is an inclined plane.

[0102] In one embodiment, referring to Figure 2 、 Figure 5 、 Figure 6 、 Figure 8 The wheel frame 10 at least includes a cross frame 11 , and rotating wheels 20 are rotatably mounted on both ends of the cross frame 11 , and the driving member 30 is rotatably mounted on the cross frame 11 .

[0103] In one embodiment, when the driving member 30 includes a rotating portion 31 and a pedal portion 32, a mounting groove 1103 is provided inside the wheel frame 10, and the wheel frame 10 includes a cross frame 11, the mounting groove 1103 is provided on the cross frame 11. When rotating wheels 20 are installed at both ends of the cross frame 11, the mounting groove 1103 is located between the two rotating wheels 20.

[0104] Optionally, the horizontal frame 11 is a split structure, refer to Figure 2 、 Figures 6 to 8 The horizontal frame 11 includes a first frame portion 111 and a second frame portion 112, the installation groove 1103 includes a first groove portion provided on a side of the first frame portion 111 close to the second frame portion 112, and the installation groove 1103 also includes a second groove portion provided on a side of the second frame portion 112 close to the first frame portion 111.

[0105] For example, the first frame portion 111 is located on the upper side and is the upper frame portion, and the second frame portion 112 is located on the lower side and is the lower frame portion. A method for installing the driving member 30 to the horizontal frame 11 is provided, wherein the first frame portion 111 is separated from the second frame portion 112, and the rotating wheel 20 of the driving member 30 is first installed in the second groove portion on the lower side, and then the first frame portion 111 is set on the upper side of the second frame portion 112, and the rotating portion 31 of the driving member 30 is installed in the first groove portion on the upper side, and then the first frame portion 111 and the second frame portion 112 are locked and fixed. After the installation is completed, a part of the rotating portion 31 of the driving member 30 is located in the first groove portion, and the other part is located in the second groove portion. Mounting shafts are set at both ends of the driving member 30, and the mounting shafts are rotatably clamped between the first frame portion 111 and the second frame portion 112, so as to realize the rotatable connection between the rotating portion 31 of the driving member 30 and the wheel frame 10. In this embodiment, the rotating part 31 of the driving member 30 is clamped by the upper and lower frame parts, so that the rotating part 31 of the driving member 30 is installed into the interior of the wheel frame 10, is not easily worn, the driving member 30 is stably installed, the driving member 30 functions reliably, and is easy and quick to assemble.

[0106] Optionally, refer to Figure 2 、 Figure 6 、 Figure 7 The wheel frame 10 further includes a vertical frame 12, a first end of the vertical frame 12 being connected to the horizontal frame 11, and a second end thereof being connected to the device body 200 of the audio and video device, so as to mount the wheel frame 10 on the device body 200. In other embodiments, the wheel frame 10 may also include only the horizontal frame 11, which is directly fixed to the bottom of the device body 200.

[0107] In other embodiments, the cross frame 11 of the wheel frame 10 can also be non-detachable, and elastic mounting shafts are directly set on the left and right ends of the rotating part 31 of the driving member 30. Before installation, the elastic mounting shafts on both sides are pressed inward so that the rotating part 31 of the driving member 30 can be inserted into the mounting groove 1103 of the cross frame 11 until the elastic mounting shaft is inserted into the mounting holes of the groove walls on both sides of the mounting groove 1103, thereby completing the rotatable installation of the rotating part 31 of the driving member 30 in the mounting groove 1103.

[0108] In one embodiment, referring to Figure 4 、 Figure 6 、 Figure 7 、 Figure 12 The rotating wheel 20 is rotatably mounted on the wheel frame 10 via the connecting shaft 60. The first end of the connecting shaft 60 may be fixedly connected to the wheel frame 10, and the second end may be rotatably connected to the rotating wheel 20; or the first end of the connecting shaft 60 may be rotatably connected to the wheel frame 10, and the second end may be fixedly connected to the rotating wheel 20.

[0109] Optionally, when the first end of the connecting shaft 60 is fixedly connected to the wheel frame 10 and the second end is rotatably connected to the rotating wheel 20, refer to Figure 4 、 Figure 6 、 Figure 12 The schematic diagram shows the structure of the connecting shaft 60, which includes a first shaft portion 61 and a second shaft portion 62. The first shaft portion 61 is relatively fixedly connected to the wheel frame 10, while the second shaft portion 62 is rotationally connected to the rotating wheel 20. It will be appreciated that when the second shaft portion 62 is rotationally connected to the rotating wheel 20, a bearing 80 can be disposed between the rotating wheel 20 and the second shaft portion 62 to reduce the rotational resistance of the rotating wheel 20 and ensure smooth rotation of the rotating wheel 20. This eliminates the need to dispose the bearing 80 within the wheel frame 10, simplifying the structure of the wheel frame 10.

[0110] Reference Figure 2 、 Figure 5 The wheel frame 10 includes a cross frame 11, and a rotating wheel 20 is provided at both ends of the cross frame 11. The cross frame 11 includes a first frame portion 111 and a second frame portion 112. The first shaft portion 61 is clamped between the first frame portion 111 and the second frame portion 112, and the first shaft portion 61 is connected to the first frame portion 111 or the second frame portion 112 through a fastener. The rotating wheel 20 includes a wheel hole, and the rotating wheel 20 is sleeved outside the second shaft portion 62. The second shaft portion 62 is inserted into the wheel hole of the rotating wheel 20. A bearing 80 is provided between the inner wall of the wheel hole and the second shaft portion 62, and the rotating wheel 20 is rotatably connected to the second shaft portion 62. In this embodiment, the cross frame 11 includes two detachably connected frame portions, so that the first shaft portion 61 is conveniently fixed between the two frame portions, thereby realizing the connection and relative fixation between the connecting shaft 60 and the wheel frame 10, and the assembly is convenient and quick.

[0111] Optionally, the first shaft portion 61 of the connecting shaft 60 and the cross frame 11 of the wheel frame 10 may be connected in the following manner:

[0112] A first mounting slot 11051 is provided on the side of the first frame portion 111 proximal to the second frame portion 112, and a second mounting slot 11052 is provided on the side of the second frame portion 112 proximal to the first frame portion 111. A first end slot communicating with the first mounting slot 11051 is provided on the side of the first frame portion 111 proximal to the rotating wheel 20, and a second end slot communicating with the second mounting slot 11052 is provided on the side of the second frame portion 112 proximal to the rotating wheel 20. A portion of the first shaft portion 61 is inserted into the first mounting slot 11051, and a portion is inserted into the second mounting slot 11052. The first shaft portion 61 is connected to the first frame portion 111 or to the second frame portion 112 via fasteners. Because the cross frame 11 includes two detachably connectable frame portions, the first shaft portion 61 of the connecting shaft 60 can be inserted into the cross frame 11 of the wheel frame 10 and fixedly connected thereto, making installation of the connecting shaft 60 quick and easy, and providing stable and reliable performance.

[0113] For example only, refer to Figure 12, the first shaft portion 61 for inserting into the wheel frame 10 to be fixedly connected with the wheel frame 10 is a flat square shaft, correspondingly, referring to Figure 7 、 Figure 11 The first card slot 11051 and the second card slot 11052 are rectangular slots. In this way, after the first shaft portion 61 is installed inside the horizontal frame 11, the position is fixed and the first shaft portion 61 is not easy to twist, thereby ensuring the installation reliability of the connecting shaft 60. Figure 12 The second shaft portion 62 for inserting the rotating wheel 20 and rotatably connecting with the rotating wheel 20 is a round shaft, so that the rotating wheel 20 can be rotatably connected to the second shaft portion 62. With the connecting shaft 60 having one end square and the other end round, the installation of the rotating wheel 20 is stable and reliable, and the rotation is smooth.

[0114] In one embodiment, referring to Figure 1 、 Figure 4 、 Figure 5 、 Figure 8 As shown, the rotating wheel 20 is spaced apart from the wheel frame 10, and the rotating wheel 20 is rotatably connected to the wheel frame 10 through the connecting shaft 60; a decorative shell 70 is provided between the rotating wheel 20 and the wheel frame 10, and the decorative shell 70 is provided with a shell through hole 701, and the connecting shaft 60 is passed through the shell through hole 701. Figure 4 The locking groove 201 is provided on the side of the rotating wheel 20 close to the wheel frame 10 , and the locking groove 201 is connected to the shell through hole 701 . When the driving member 30 is in the second position, the second end of the brake rod 51 passes through the shell through hole 701 and is inserted into the locking groove 201 .

[0115] In this embodiment, in addition to the locking groove 201 being located on the side of the rotating wheel 20 near the wheel frame 10, a certain distance is placed between the rotating wheel 20 and the wheel frame 10, and a decorative cover is positioned over the connecting shaft 60 at this distance. The decorative cover 70 shields the locking groove 201, preventing it from being exposed to the user, resulting in an aesthetically pleasing appearance. Furthermore, the decorative cover 70 shields the locking groove 201, preventing dust or even debris from entering the locking groove 201, thereby preventing the second end of the brake lever 51 from being smoothly inserted into the locking groove 201. This provides protection, ensuring that the brake lever 51 can be inserted into the locking groove 201 to brake the rotating wheel 20 when needed, ensuring reliable braking. The through-hole 701 in the decorative cover 70 not only provides space for the connecting shaft 60 to pass through, but also for the brake lever 51 to pass through.

[0116] Optionally, when the driving member 30 is in the first position, the second end of the brake rod 51 is located in the shell through hole 701. In this way, when the driving member 30 switches from the first position to the second position, the brake rod 51 only needs a small distance to be inserted into the locking groove 201 of the rotating wheel 20, which has high reliability.

[0117] In one embodiment, referring to Figure 15 The device body 200 includes a speaker housing 210, a pull rod 220, and a display device 230. The speaker housing 210 houses a sound playback module, such as a speaker. The wheel frame 10 is rotatably connected to the speaker housing 210 via a rotating connection 121. The pull rod 220 is connected to the speaker housing 210. The display device 230 includes a display screen and is detachably connected to the pull rod 220. When the device is in motion, the user can easily move the audio and video device by pulling the pull rod 220, making it suitable for moving the device to a target location for use.

[0118] The audio and video device of this embodiment has at least an audio playback function. When the user does not need to use the video playback function, the display device 230 can be removed from the pull rod 220, thereby properly storing the valuable display device 230. When the user needs to use the video playback function, the display device 230 can be installed on the pull rod 220.

[0119] The device can be used when users need to perform square dance, or when school clubs need to perform club performances. It is also suitable for school physical education teachers to play audio during class.

[0120] Optionally, the display device 230 can establish communication with the speaker box 210 through wired communication or wireless communication, and then the user can control the display device 230 to make the speaker box 210 play appropriate music. Among them, the display device 230 can serve as the audio source of the speaker box 210. Of course, other terminals such as mobile phones can also be used as the audio source of the speaker box 210.

[0121] In one embodiment, the pull rod 220 is configured to be slidably mounted on the speaker cabinet 210. The pull rod 220 includes a main rod body and a grab handle. The main rod body is slidably mounted on the speaker cabinet 210, and the grab handle is connected to the top of the main rod body. The pull rod 220 has a storage state, in which all or at least part of the main rod body of the pull rod 220 is stored inside the speaker cabinet 210. The pull rod 220 has a pulling state, in which part or all of the main rod body of the pull rod 220 extends out of the speaker cabinet 210, which is convenient for adapting to different user heights and comfortably pulling the device. Optionally, the main rod body is provided with a flat-panel mounting portion so that the display device 230 can be mounted on the flat-panel mounting portion of the main rod body when needed.

[0122] In the description herein, it should be understood that terms such as "upper," "lower," "left," and "right" are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0123] Throughout this specification, references to terms such as "one embodiment" and "example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example.

[0124] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0125] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific implementations of the present invention without inventive effort, and such implementations will fall within the scope of protection of the present invention.

Claims

1. A rotating wheel mechanism, characterized in that: A device body (200) for installation on audio and video equipment; The rotating wheel mechanism (100) comprises a wheel frame (10), a rotating wheel (20), a driving member (30) and a brake lever (51); The rotating wheel (20) is rotatably connected to the wheel frame (10), the driving member (30) is rotatably connected to the wheel frame (10), the brake lever (51) is arranged between the rotating wheel (20) and the driving member (30), and the brake lever (51) is slidably connected to the wheel frame (10); A driving surface (341) is provided on a side of the driving member (30) facing the rotating wheel (20), a locking groove (201) is provided on a side of the rotating wheel (20) facing the driving member (30), a first end of the brake lever (51) abuts against the driving surface (341), and a second end of the brake lever (51) is used to be inserted into or removed from the locking groove (201); The driving member (30) can be rotated relative to the wheel frame (10) under the action of an external force to adjust between a first position and a second position; when the driving member (30) is located at the first position, the second end of the brake lever (51) is out of the locking groove (201); during the process of the driving member (30) rotating from the first position to the second position, the driving surface (341) drives the brake lever (51) to slide in a direction close to the rotating wheel (20); when the driving member (30) is located at the second position, the second end of the brake lever (51) on the side away from the driving member (30) is inserted into the locking groove (201) to limit the rotation of the rotating wheel (20).

2. The rotating wheel mechanism according to claim 1, characterized in that: A guide hole (1102) is provided inside the wheel frame (10), and the guide hole (1102) is located between the driving member (30) and the rotating wheel (20). The end of the guide hole (1102) close to the driving member (30) has an inner opening, and the end of the guide hole (1102) close to the rotating wheel (20) has an outer opening. The brake rod (51) is slidably mounted in the guide hole (1102), and the first end of the brake rod (51) extends out of the inner opening and abuts against the driving surface (341); when the driving member (30) is located in the second position, the second end of the brake rod (51) extends out of the outer opening and is inserted into the locking groove (201).

3. The rotating wheel mechanism according to claim 2, characterized in that: The driving member (30) includes a rotating portion (31) and a pedal portion (32), wherein the rotating portion (31) is used to connect with the wheel frame (10), and the pedal portion (32) is used to provide a force application position; The wheel frame (10) is provided with a mounting groove (1103) inside, the mounting groove (1103) is communicated with the inner hole, the wheel frame (10) is also provided with a position-avoiding groove (1104) communicated with the mounting groove (1103), the rotating portion (31) is provided in the mounting groove (1103) and is rotatably connected to the wheel frame (10), and the pedal portion (32) extends from the outside of the wheel frame (10) through the position-avoiding groove (1104).

4. The rotating wheel mechanism according to claim 3, characterized in that: The wheel frame (10) includes a first frame portion (111) and a second frame portion (112), the rotating portion (31) is sandwiched between the first frame portion (111) and the second frame portion (112), and the first frame portion (111) is connected to the second frame portion (112); The mounting groove (1103) includes a first groove portion arranged on a side of the first frame portion (111) close to the second frame portion (112), and also includes a second groove portion arranged on a side of the second frame portion (112) close to the first frame portion (111); a portion of the rotating portion (31) is arranged in the first groove portion, and the other portion is arranged in the second groove portion.

5. The rotating wheel mechanism according to claim 2, characterized in that: A reset member (52) is provided between the brake lever (51) and the wheel frame (10), and the reset member (52) is an elastic member; The brake lever (51) includes a rod body (511) and a limiting protrusion (512), and the limiting protrusion (512) protrudes relative to the outer periphery of the rod body (511); the elastic member is arranged on the side of the limiting protrusion (512) away from the driving member (30), one end of the elastic member is in contact with the limiting protrusion (512), and the other end is in contact with the wheel frame (10), and when the driving member (30) rotates from the second position to the first position, the reset member (52) drives the second end of the brake lever (51) to disengage from the locking groove (201).

6. The rotating wheel mechanism according to claim 1, characterized in that: A raised arc-shaped boss (34) is provided on a surface of the driving member (30) close to the rotating wheel (20), and the arc-shaped boss (34) extends from a first end to a second end thereof along a direction surrounding a connecting axis (60) of the driving member (30), and a raised height of the first end of the arc-shaped boss (34) is smaller than a raised height of the second end of the arc-shaped boss (34); The driving surface (341) is the surface of the arc-shaped boss (34) close to the rotating wheel (20), and the first end of the brake rod (51) abuts against the arc-shaped boss (34).

7. The rotating wheel mechanism according to any one of claims 2 to 6, characterized in that: The rotating wheel (20) is rotatably mounted on the wheel frame (10) via a connecting shaft (60); The connecting shaft (60) includes a first shaft portion (61) and a second shaft portion (62); the wheel frame (10) includes a first frame portion (111) and a second frame portion (112); the first shaft portion (61) is arranged between the first frame portion (111) and the second frame portion (112); the first shaft portion (61) is connected to the first frame portion (111) or the second frame portion (112) through a fastener; the rotating wheel (20) is sleeved outside the second shaft portion (62) and is rotatably connected to the second shaft portion (62).

8. The rotating wheel mechanism according to any one of claims 2 to 6, characterized in that: The rotating wheel (20) and the wheel frame (10) are spaced apart, and the rotating wheel (20) is rotatably connected to the wheel frame (10) via a connecting shaft (60); a decorative shell (70) is provided between the rotating wheel (20) and the wheel frame (10), and the decorative shell (70) is provided with a shell through hole (701), and the connecting shaft (60) is passed through the shell through hole (701); The locking groove (201) is provided on a side of the rotating wheel (20) close to the wheel frame (10), and the locking groove (201) is communicated with the shell through hole (701). When the driving member (30) is located at the second position, the second end of the brake rod (51) passes through the shell through hole (701) and is inserted into the locking groove (201).

9. The rotating wheel mechanism according to any one of claims 2 to 6, characterized in that: A circle of the locking groove (201) is provided on one side of the rotating wheel (20) close to the driving member (30); and / or, the rotating wheels (20) are provided at both ends of the wheel frame (10).

10. An audio and video device, characterized in that: It comprises an equipment body (200) and a rotating wheel mechanism (100) according to any one of claims 1 to 9, wherein the wheel frame (10) is connected to the equipment body (200).

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