Projector rotating structure and barrel projector

Abstract

The application discloses a projector rotating structure and a barrel projector. The projector rotating structure comprises a projector body, a first side wall provided with a first rotating part, and a second side wall provided with a second rotating part; a first support arm is located outside the first side wall, a first rotating part is located inside the body, and the first rotating part is connected through a first rotating shaft; a second support arm is located outside the second side wall, a second rotating part is provided through the second rotating part and extends into the body, one end of the second rotating part is fixed with the second support arm, and the other end is rotationally connected with the inside of the second side wall; an axial wire passing channel is arranged in the second rotating part, and a wire passing channel is arranged in the second support arm and is communicated, so that functional wires are sequentially arranged and enter the inside of the body. The structure adopts an integral internal mounting structure, the rotating matching part is shielded by the body and is not exposed, the appearance is simple and space-saving, rotation and wire arrangement are integrated, cable exposure and abrasion are avoided, reliability and space utilization are improved, axial limiting is stable, and assembly is convenient.

Description

Technical Field

[0001] This application relates to the field of projector equipment technology, and in particular to a projector rotating structure and a cannon projector. Background Technology

[0002] In the field of projector technology, the rotating structure is a key component for achieving projection angle adjustment and meeting multi-angle projection needs. Currently, common rotating solutions mainly fall into two categories: one is gear or motor driven, which achieves electric rotation through a motor and gear set. This type has a complex structure, many parts, high cost, and occupies a large internal space, which is not conducive to the miniaturization and compact design of projectors; the other type is manual or friction damping, which relies on mechanical friction to provide rotational damping. However, existing ones mostly use exposed metal damping shaft structures, which have cumbersome installation procedures, high requirements for the precision of parts fitting, and high cost.

[0003] Furthermore, existing rotating structures typically place the rotating mating parts on the outside of the projector body, with functional wires often arranged along the outside of the body or requiring additional exposed wiring channels. This arrangement not only affects the integrity of the product's appearance but also makes cables prone to exposure and wear, difficult to route, and hinders the integrated functionality of power supply, audio signal transmission, and other functions within a limited internal space. Summary of the Invention

[0004] The purpose of this invention is to overcome at least the technical problems of the existing external rotating structure affecting wiring and aesthetics, and to provide a projector rotating structure and a cannon projector. The projector adopts an integrated internal structure, so that the rotating parts are covered by the body and not exposed, resulting in a simple appearance and saving space. The rotation and wiring are integrated, avoiding exposed and worn cables, improving reliability and space utilization, and providing axial positioning stability and easy assembly.

[0005] This application provides a projector rotating structure, comprising: The projector body has a first sidewall and a second sidewall that are arranged opposite to each other. The first sidewall is provided with a first rotating part, and the second sidewall is provided with a second rotating part. The first support arm is located on the outer side of the first sidewall; The first rotating component is located inside the projector body; the first support arm is connected to the first rotating component via a first rotating shaft, and the first rotating shaft passes through the first rotating part. The second support arm is located on the outer side of the second sidewall; The second rotating component passes through the second rotating part and extends into the inside of the projector body. One end of the second rotating component is fixed to the second support arm, and the other end is rotatably engaged with the inside of the second side wall. The second rotating component has a cable passage extending along its axial direction, and the second support arm has a cable routing channel. The cable routing channel is connected to the cable passage. The cable routing channel and the cable passage are used for the functional wires to pass through sequentially and enter the inside of the projector body.

[0006] In some embodiments, the first support arm and the first rotating member are respectively located on both sides of the first rotating part to prevent the first sidewall from moving axially along the first rotating axis; The second rotating member is inserted through the second rotating part, with one end fixed to the second support arm and the other end provided with a snap-fit ​​lip plate. The snap-fit ​​lip plate is rotatably snapped into the inner side of the second side wall to prevent the second rotating member from coming out axially.

[0007] In some embodiments, the second rotating member includes, in sequence along its axial direction, a fixing part, a rotating engagement part, and a snap-fit ​​part; the second support arm is provided with a recessed second assembly groove on the side facing the first support arm, the fixing part of the second rotating member is installed in the second assembly groove, and the two are fixed by a fixing member; the rotating engagement part passes through the second rotating part and rotates with it; the snap-fit ​​part is a snap-fit ​​lip plate installed at the end of the rotating engagement part; The snap-fit ​​lip plate and the rotating mating part are provided with a plurality of spacer grooves along their circumference, and the plurality of spacer grooves isolate the snap-fit ​​lip plate and the rotating mating part into a plurality of snap claws with radial elastic deformation; the snap-fit ​​lip plate is provided with a guide cone surface on the side away from the second support arm, and the guide cone surface is used to guide the snap-fit ​​lip plate to be inserted into the second rotating part.

[0008] In some embodiments, a fastening element is provided on the inner side of the second sidewall, the fastening element including a cylindrical portion and a flange located at one end of the cylindrical portion; The other end of the cylindrical part is inserted into the rotating fitting part of the second rotating part to prevent the pawl from deforming in the axial direction; The flange slides against the inner side of the second side wall; A cavity for accommodating the snap-fit ​​lip plate is formed between the flange, the inner side of the second side wall, and the cylindrical portion; The fastening component rotates synchronously with the second rotating component; A polytetrafluoroethylene tape is provided between the flange and the second sidewall.

[0009] In some embodiments, the first rotating shaft is integrally formed with the first support arm and separately connected to the first rotating component, or integrally formed with the first rotating component and separately connected to the first support arm, or separately connected to both; the second rotating component is integrally formed with the second support arm, or separately fixed to the second support arm by a fixing component.

[0010] In some embodiments, a first elastic friction element is provided between the first rotating component and the inner wall of the projector body; a second elastic friction element is provided between the second rotating component and the inner wall of the projector body; when the projector body rotates relative to the first support arm, the first elastic friction element is compressed and generates frictional resistance; when the projector body rotates relative to the second support arm, the second elastic friction element is compressed and generates frictional resistance.

[0011] In some embodiments, at least one of the first rotating member and the second rotating member is a polyoxymethylene rotating member; The inner side of the first sidewall is provided with a recessed first assembly groove, the first rotating component is installed in the first assembly groove, and the depth of the first assembly groove is not less than the thickness of the first rotating component along its axial direction. The rotating mating part of the second rotating member passes through the second rotating part, and the fixing part of the second rotating member is installed in the second assembly groove of the second support arm. An assembly gap for accommodating the fixing part of the second rotating member is formed between the second side wall and the second support arm.

[0012] In some embodiments, a wear-resistant pad is provided between the first sidewall and the first support arm; The first sidewall and the first support arm are provided with receiving grooves corresponding to the wear-resistant pad. The two receiving grooves are fastened together to form a receiving cavity. The wear-resistant pad is located in the receiving cavity, and the thickness of the wear-resistant pad is greater than the sum of the depths of the two receiving grooves, so that a rotation gap is formed between the first support arm and the first sidewall.

[0013] In some embodiments, the first rotating part extends outward from the first sidewall to form a first guide ring, and the first support arm is provided with a second guide ring extending towards the first sidewall on the side facing the first sidewall. The first guide ring and the second guide ring are nested and slide against each other. The first support arm is provided with a third assembly groove on the side facing the first sidewall, and the second guide protrusion is disposed in the third assembly groove. The mating surfaces of the first guide protrusion and the second guide protrusion are cylindrical surfaces or conical surfaces.

[0014] In some embodiments, the first rotating shaft and the first rotating component are fixed by a locking component, which includes a machine screw and a copper nut. The shaft core of the first rotating shaft has a hollow portion, and the copper nut is embedded in the hollow portion. The machine screw passes through the first rotating component and extends into the hollow portion of the first rotating shaft, and is threadedly engaged with the copper nut to lock the first rotating shaft and the first rotating component. The machine screw is coated with anti-loosening adhesive.

[0015] A projector with a cannon barrel includes a projector rotating structure, a speaker base, and an optical engine; the optical engine is mounted inside the projector body; the speaker base includes a base shell, and a first support arm and a second support arm are respectively fixed to both sides of the base shell by fasteners.

[0016] In some embodiments, the speaker base further includes a speaker cover, and the base housing and the speaker cover are sealed by ultrasonic welding to form a sealed acoustic cavity; the speaker body is provided inside the sealed acoustic cavity, and a power interface is provided on the surface of the base housing; The base housing contains a power supply adapter board, which is used for power and signal conversion. The speaker body has a functional wire, which passes through the wiring channel and the cable passage in sequence to enter the internal electrical connection of the projector body. The speaker base is also equipped with an inner support and a passive radiator; The inner support is fixed inside the sealed acoustic cavity; The passive radiator is mounted on the inner bracket, and the horn body is used to drive the passive radiator to vibrate.

[0017] The present invention provides a rotating structure for a projector and a barrel projector, employing an integrated internal structure: the first rotating component is entirely located inside the projector body, the rotating mating part of the second rotating component is located within the second rotating part, and the cable routing channel communicates with the interior of the projector body. The rotating mating points of the first rotating shaft and the first rotating part, the rotating mating points of the second rotating component and the second rotating part, and the rotating snap-fit ​​points of the second rotating component and the inner side wall are all concealed by the projector body and not exposed on its outer contour. Since the rotating mating parts and cable routing structure are integrally housed within the body or within the internal space enclosed by the body and the support arm, on the one hand, the rotating mating parts are not exposed on the exterior surface, resulting in a simple and complete product appearance, saving external space, and facilitating a compact projector design; on the other hand, functional wires can sequentially enter the interior of the projector body through the cable routing channel within the second support arm and the cable passage channel within the second rotating component, achieving integrated rotation and cable routing, avoiding cable exposure, wear, and snagging, and improving overall reliability and space utilization. Meanwhile, one end of the second rotating component is fixed to the second support arm, and the other end is rotatably engaged with the inner side of the second side wall, which achieves reliable rotation while forming an axial limit. The structure is compact and easy to assemble, which helps to improve the stability of the rotating structure during long-term use. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the projector provided in one embodiment of this application; Figure 2 This is a schematic diagram of the projector in a disassembled state according to one embodiment of this application; Figure 3 This is a schematic diagram of the split state structure of a projector from another perspective provided in one embodiment of this application; Figure 4 This is a cross-sectional schematic diagram of the projector split structure provided in one embodiment of this application; Figure 5 This is a cross-sectional structural schematic diagram of a projector provided in one embodiment of this application; Figure 6 yes Figure 5 Enlarged view of the first support arm in Zone A; Figure 7 yes Figure 5 Enlarged view of the second support arm in area A; Figure 8This is a schematic diagram of the disassembled structure of the second rotating member and the fastening member provided in one embodiment of this application.

[0020] Explanation of reference numerals in the attached drawings: 1. Projector body; 11. First sidewall; 111. First rotating part; 112. First assembly groove; 113. First guide ring; 12. Second sidewall; 121. Second rotating part; 122. Fastening element; 1221. Cylindrical part; 1222. Flanged edge; 1223. Cavity; 1224. PTFE tape; 1225. Wedge-shaped part; 123. Assembly gap; 2. First support arm; 21. Second guide ring; 22. Third assembly groove; 23. Receiving groove; 3. First rotating component; 4. Second support arm; 41. Cable routing channel; 42. Second assembly groove; 5. Second rotating component; 51. 52. Fixing part; 53. Rotating mating part; 54. Snap-fitting part; 55. Snap-fitting lip plate; 56. Guide cone surface; 57. Spacing groove; 58. Claw; 59. Wire passage; 50. Annular locking groove; 6. First rotating shaft; 70. Locking component; 71. Machine screw; 72. Copper nut; 8. First elastic friction component; 9. Second elastic friction component; 10. Wear-resistant pad; 20. Rotation clearance; 31. Speaker base; 32. Base shell; 33. Speaker cavity; 34. Speaker body; 35. Power interface; 36. Speaker top cover; 37. Power supply adapter plate; 38. Inner bracket; 39. Passive radiator; 30. Locking post. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] It should be noted that the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to direct setup or connection, or indirect setup or connection through centered components or centered structures.

[0023] Furthermore, in embodiments of this invention, terms such as "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are used to indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, or in a conventional placement or usage state. These terms are merely for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the structures, features, devices, or elements referred to must have a specific orientation or positional relationship, nor that they must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0024] The various specific technical features and embodiments described in the detailed embodiments can be combined in any suitable manner without contradiction. For example, different implementation methods can be formed by combining different specific technical features / embodiments. In order to avoid unnecessary repetition, the various possible combinations of the various specific technical features / embodiments in this invention will not be described separately.

[0025] This embodiment discloses a rotating structure for a projector, such as Figures 1 to 8 As shown, the projector includes a projector body 1, a first support arm 2, a first rotating component 3, a second support arm 4, and a second rotating component 5. The projector body 1 has a first sidewall 11 and a second sidewall 12 arranged opposite to each other. The first sidewall 11 has a first rotating portion 111, and the second sidewall 12 has a second rotating portion 121. The first support arm 2 is located outside the first sidewall 11. The first rotating component 3 is located inside the projector body 1, i.e., inside the first sidewall 11. The first support arm 2 and the first rotating component 3 are connected by a first rotating shaft 6, which passes through the first rotating portion 111. The second support arm 4 is located outside the second sidewall 12. The second rotating component 5 passes through the second rotating portion 121 and extends into the inside of the projector body 1. One end of the second rotating component 5 is connected to... The second support arm 4 is fixed, and its other end is rotatably engaged with the inner side of the second side wall 12. The second rotating component 5 has a cable passage 54 extending axially through it, and the second support arm 4 has a cable routing channel 41 connected to the cable routing channel 54, allowing functional wires to pass through the cable routing channel 41 and the cable routing channel 54 sequentially and enter the projector body 1. The first rotating component 3 is located inside the projector body 1; at least a portion of the second rotating component 5 and the cable routing channel 54 are located inside the projector body 1; the rotating engagement parts of the first rotating component 3 and the second rotating component 5 are not exposed outside the outer contour of the projector body 1. By arranging the rotating engagement structure and the cable routing structure as much as possible inside the body or within the enclosed internal space, the exposed rotating components and cables can be avoided, thus helping to maintain the clean and complete appearance of the projector while reducing cable wear and external interference. Furthermore, this structure does not rely on a large geared motor rotating component, nor does it require an exposed metal damping shaft. Therefore, it can achieve rotational support and wiring integration within a relatively limited internal space, making it more suitable for compact interior design.

[0026] Specifically, the first support arm 2 and the first rotating member 3 are located on both sides of the first rotating part 111 to prevent the first sidewall 11 from moving axially along the first rotating shaft 6; the second rotating member 5 passes through the second rotating part 121, with one end fixed to the second support arm 4 and the other end provided with a snap-fit ​​lip plate 531, which is rotatably snapped into the inner side of the second sidewall 12 to prevent the second rotating member 5 from coming off axially. With this arrangement, the projector body 1 can be axially limited on both the left and right sides, thus ensuring that the body is not prone to shifting when rotating. Compared with the method of simply relying on external fasteners for limiting, this arrangement of one inside and one outside clamping is more conducive to reducing the number of parts and improving the stability after assembly. Furthermore, the second side forms a limiting relationship with the inner side of the second sidewall 12 through the snap-fit ​​lip plate 531, which can achieve a relatively simple assembly while ensuring the rotation function, making it easy to press the second rotating member 5 in from the outside to the inside.

[0027] Further, see Figure 7 and 8 As shown, the second rotating component 5 includes, along its axial direction, a fixing part 51, a rotating engagement part 52, and a snap-fit ​​part 53. The second support arm 4 has a recessed second assembly groove 42 on the side facing the first support arm 2. The fixing part 51 of the second rotating component 5 is installed in the second assembly groove 42, and the two are fixed together by a fixing member. The rotating engagement part 52 passes through the second rotating part 121 and rotates with it. The snap-fit ​​part 53 is a snap-fit ​​lip plate 531 installed at the end of the rotating engagement part 52. With this arrangement, the second rotating component 5 can have its fixing, rotating, and anti-detachment functions divided into sections along the axial direction, making the structural relationship of each functional area clearer and facilitating processing and assembly. Furthermore, after the fixing part 51 is embedded in the second mounting groove 42, the protrusion of the second support arm 4 toward the second side wall 12 can be reduced, or the overall space occupied between the second support arm 4 and the second side wall 12 can be reduced, thereby improving the structural compactness; after the rotating mating part 52 cooperates with the second rotating part 121, it can provide stable rotational support; the snap-fit ​​part 53 is located inside the body and can achieve anti-disengagement and limiting without occupying additional external space. It should be noted that the fixing part can be a screw, rivet, self-tapping screw, hot melt pin locking structure or snap-fit ​​fixing structure, as long as it can reliably fix the second rotating part 5 and the second support arm 4.

[0028] Furthermore, the snap-fit ​​lip plate 531 and the rotating mating part 52 are provided with multiple spacer grooves 533 spaced circumferentially, which separate the snap-fit ​​lip plate 531 and the rotating mating part 52 into multiple claws 534 with radial elastic deformation. A guide cone surface 532 is provided on the side of the snap-fit ​​lip plate 531 away from the second support arm 4, which guides the snap-fit ​​lip plate 531 into the second rotating part 121. With this arrangement, the multiple claws 534 can gradually retract during assembly with the help of the guide cone surface 532, and spring back open after passing through the second rotating part 121, so that the snap-fit ​​lip plate 531 is locked inside the second sidewall 12. This structure reduces complex secondary assembly operations and facilitates improved assembly efficiency. Furthermore, the circumferential distribution of the claws 534 allows for more uniform force distribution on the snap-fit, thereby reducing local stress concentration and improving reliability during long-term use. It should be noted that the number of spacer slots 533 can be two, three, four or more, as long as they can form elastically deformable claws 534; the guide cone surface 532 can be a conical surface, an inclined surface, an arc transition surface or a multi-segment guide surface.

[0029] Furthermore, a fastening member 122 is provided on the inner side of the second sidewall 12. The fastening member 122 includes a cylindrical part 1221 and a flange 1222 located at one end of the cylindrical part 1221. The other end of the cylindrical part 1221 is inserted into the rotating fitting part 52 of the second rotating member 5 and is press-fitted with the rotating fitting part 52 to prevent the pawl 534 from deforming in the axial direction. The flange 1222 slides against the inner side of the second sidewall 12. A cavity 1223 for accommodating the snap-fit ​​lip plate 531 is formed between the flange 1222, the inner side of the second sidewall 12, and the cylindrical part 1221. The cylindrical part 1221 is a hollow cylinder, and its interior is connected to the wire passage 54 for the functional wire to pass through. The fastening member 122 rotates synchronously with the second rotating member 5. A polytetrafluoroethylene tape 1224, specifically a Teflon tape, is provided between the flange 1222 and the second sidewall 12. With this configuration, after the fastener 122 is assembled on the inner side of the second side wall 12, it can externally restrict the claw 534, reducing the risk of the claw 534 retracting inward and accidentally disengaging under shaking, tension, or long-term use, thereby improving the safety and stability of the second side connection. Furthermore, the flange 1222 slides against the inner side of the second side wall 12, providing support while maintaining rotational function; the presence of PTFE tape 1224 between the flange 1222 and the second side wall 12 reduces friction and wear, improving the feel of rotation. It should be noted that the fastener 122 can preferably be a C-shaped snap-fit ​​structure, but can also be replaced with an open annular snap-fit, an elastic collar, or a partially limiting sleeve structure, as long as it can effectively prevent the claw 534 from retracting inward.

[0030] Furthermore, the fastening member 122 has multiple wedge-shaped portions 1225 circumferentially arranged on the side wall facing the second rotating member 5 for engaging with the outer side of the second rotating member 5. Correspondingly, the outer side of the second rotating member 5 has an annular locking groove 55 corresponding to the wedge-shaped portions 1225. With this arrangement, the fastening member 122 can be fixed to the second rotating member 5 through the engagement of the wedge-shaped portions 1225 and the annular locking groove 55, ensuring that the fastening member 122 and the second rotating member 5 rotate synchronously and are less prone to relative loosening. This engagement relationship also facilitates control of the installation position of the fastening member 122, improving assembly reliability. It should be noted that the engagement relationship between the wedge-shaped portions 1225 and the annular locking groove 55 can also be replaced by a protrusion and groove engagement, a locking platform and a locking slot engagement, or a partial interference fit, as long as the relative fixation between the fastening member 122 and the second rotating member 5 can be maintained.

[0031] Furthermore, the first rotating shaft 6 is integrally formed with the first support arm 2 and separately connected to the first rotating component 3, or integrally formed with the first rotating component 3 and separately connected to the first support arm 2, or separately connected to both; the second rotating component 5 is integrally formed with the second support arm 4, or separately fixed to the second support arm 4 by a fastener. This configuration allows for selection of appropriate connection methods based on different processing techniques, material types, and assembly requirements. If the first rotating shaft 6 is integrally formed with the first support arm 2, it helps reduce the number of parts and improve the rigidity of the support end; if the first rotating shaft 6 and the first rotating component 3 are separately connected, it facilitates assembly after separate molding. Furthermore, if the second rotating component 5 and the second support arm 4 are integrally formed, it reduces the fixing interface and improves structural simplicity; if they are separately fixed, it facilitates combination between different materials, such as using metal parts for the support and plastic parts for the rotating component. It should be noted that, in addition to screw fastening, separate connection methods can also include riveting, hot-melt connection, adhesive bonding, snap-fit ​​connection, or insert injection molding.

[0032] Furthermore, a first elastic friction element 8 is provided between the first rotating component 3 and the inner side wall of the projector body 1; a second elastic friction element 9 is provided between the second rotating component 5 and the inner side wall of the projector body 1; when the projector body 1 rotates relative to the first support arm 2, the first side wall 11 rotates relative to the first rotating component 3, the first elastic friction element 8 is compressed and generates frictional resistance; when the projector body 1 rotates relative to the second support arm 4, the second side wall 12 rotates relative to the second rotating component 5, the second elastic friction element 9 is compressed and generates frictional resistance.

[0033] This design allows for a more uniform damping feel to the machine body's rotation through the frictional resistance of the compressed elastic element, eliminating the need for traditional metal damping shafts or complex gear drive mechanisms, thus reducing structural complexity and cost. Furthermore, the elastic friction method has relatively low requirements for assembly precision, facilitating stable damping in small products. Moreover, having elastic friction elements on both sides ensures more balanced force distribution on both sides of the machine body, reducing sway caused by unilateral damping. It should be noted that the first elastic friction element 8 and the second elastic friction element 9 can be rubber rings, silicone rings, elastic washers, wave-shaped elastic rings, or foam elastic rings, as long as they can provide frictional resistance under compression.

[0034] Furthermore, the first elastic friction element 8 is a first rubber ring, compressed between the first rotating element 3 and the first sidewall 11; the second elastic friction element 9 is a second rubber ring, compressed between the second rotating element 5 and the second sidewall 12. This arrangement allows for readily available and low-cost rubber ring materials with good elastic recovery capabilities, providing stable frictional damping during long-term repeated rotation. Compared to metal damping shaft structures, the arrangement and assembly of the rubber rings are simpler, and also help reduce the requirements for processing and assembly precision. It should be noted that the rubber rings can be made of nitrile rubber, silicone rubber, fluororubber, or thermoplastic elastomers, as long as they meet the requirements for wear resistance and damping.

[0035] Furthermore, at least one of the first rotating component 3 and the second rotating component 5 is a polyoxymethylene (POM) rotating component; the inner side of the first sidewall 11 is provided with a recessed first mounting groove 112, the first rotating component 3 is installed in the first mounting groove 112, and the depth of the first mounting groove 112 is not less than the thickness of the first rotating component 3 along its axial direction; the rotating mating part 52 of the second rotating component 5 passes through the second rotating part 121, the fixing part 51 is installed in the second mounting groove 42 of the second support arm 4, and an assembly gap 123 is formed between the second sidewall 12 and the second support arm 4 to accommodate the fixing part 51 of the second rotating component 5. With this configuration, the POM material has good wear resistance, self-lubrication, and dimensional stability, and its use in rotating components can improve the rotation feel and reduce wear. Furthermore, the first rotating component 3 is disposed in the first mounting groove 112, which allows the first rotating component 3 to be embedded as much as possible in the body structure, avoiding excessive occupation of the internal space of the body, and also helps to maintain a flat appearance. After the fixing part 51 of the second rotating component 5 is embedded in the second assembly groove 42 and partially located in the assembly gap 123, a compact arrangement can be achieved between the bracket and the machine body, reducing external protrusion. It should be noted that the polyoxymethylene rotating component can also be replaced with a nylon rotating component, a polycarbonate rotating component, or a metal rotating component with a low-friction layer structure, as long as the requirements for rotational fit and wear resistance can be met.

[0036] Furthermore, a wear-resistant pad 10 is provided between the first sidewall 11 and the first support arm 2, and the number can be one or more. The first sidewall 11 and the first support arm 2 are provided with receiving grooves 23 corresponding to the wear-resistant pad 10. Two receiving grooves 23 are engaged to form a receiving cavity, and the wear-resistant pad 10 is located within the receiving cavity. The thickness of the wear-resistant pad 10 is greater than the sum of the depths of the two receiving grooves 23, thus creating a rotational gap 20 between the first support arm 2 and the first sidewall 11. With this arrangement, the wear-resistant pad 10 can form a low-friction contact interface between the first sidewall 11 and the first support arm 2, thereby reducing wear during support rotation. Furthermore, since the thickness of the wear-resistant pad 10 is greater than the total depth of the receiving grooves 23, a clear rotational gap 20 can be ensured between them, preventing the first support arm 2 from directly pressing against the first sidewall 11, reducing interference and jamming. It should be noted that the wear-resistant gasket 10 can preferably be a Teflon gasket, i.e., a polytetrafluoroethylene gasket, or it can also be a PEEK gasket, a nylon gasket, an ultra-high molecular weight polyethylene gasket, or other friction-reducing gasket structures.

[0037] Furthermore, the first rotating part 111 extends outward from the first sidewall 11 to form a first guide ring 113, and a second guide ring 21 extending towards the first sidewall 11 is provided on the side of the first support arm 2 facing the first sidewall 11. The first guide ring 113 and the second guide ring 21 are nested and slidably abut against each other. With this arrangement, when the first support arm 2 rotates, the first guide ring 113 and the second guide ring 21 can form circumferential guidance and radial support, thereby improving the stability of the rotating structure and reducing the swaying that may occur when relying solely on the rotation of the first rotating shaft 6. Furthermore, after the two guide rings are nested together, they can also share the off-center load on the first rotating shaft 6 to a certain extent, improving the reliability during long-term use. Similarly, the same structure can be provided between the second rotating part 121 and the second support arm, which will not be described in detail here.

[0038] Furthermore, a third assembly groove 22 is provided on the side of the first support arm 2 facing the first sidewall 11, and a second guide ring 21 is disposed within the third assembly groove 22. The mating surfaces of the first guide ring 113 and the second guide ring 21 are cylindrical or conical surfaces. This arrangement prevents the second guide ring 21 from protruding excessively from the support surface after being placed within the third assembly groove 22, facilitating internal layout. A cylindrical surface mating facilitates machining and maintains stable sliding; a conical surface mating promotes self-centering during assembly. It should be noted that the cross-sectional shape of the guide ring can also be an arc surface, a stepped surface, or a combined transition surface, as long as it serves a guiding and limiting function.

[0039] Furthermore, the first rotating shaft 6 and the first rotating component 3 are fixed by a locking component 7. In this embodiment, the locking component 7 includes a machine screw 71 and a copper nut 72. The shaft core of the first rotating shaft 6 has a hollow portion, and the copper nut 72 is embedded in the hollow portion. The machine screw 71 passes through the first rotating component 3 and extends into the hollow portion of the first rotating shaft 6, engaging with the copper nut 72 to lock the first rotating shaft 6 and the first rotating component 3. The machine screw 71 is coated with anti-loosening adhesive, specifically anti-loosening adhesive, but other anti-loosening adhesives can also be used. This configuration, using the threaded connection of the machine screw 71 and the copper nut 72, provides a more reliable axial locking force and reduces the risk of stripping caused by directly tapping the plastic parts. Furthermore, the hollow design of the first rotating shaft 6 and the assembly of the copper nut 72 improve the ability to repeatedly assemble and disassemble and the connection strength. Furthermore, the anti-loosening adhesive coating on the machine screw 71 reduces the risk of loosening under vibration, thereby improving the long-term stability of the rotating structure. It should be noted that, in addition to the above-mentioned form, the locking component 7 can also be replaced by a bolt and insert mating structure, a blind rivet structure, a self-locking nut structure, or an elastic locking pin structure, as long as it can reliably fix the first rotating shaft 6 and the first rotating component 3.

[0040] Specifically, in a preferred assembly method, the first rotating component 3 is first installed in the first mounting slot 112 of the projector body 1, and the first elastic friction component 8 is placed between the first rotating component 3 and the first side wall 11; the first support arm 2 is aligned from the outside of the first side wall 11, so that the first rotating shaft 6 passes through the first rotating part 111, and then the first rotating shaft 6 and the first rotating component 3 are fixed by the locking component 7. At the same time, a wear-resistant pad 10 is provided between the first side wall 11 and the first support arm 2, and the first guide ring 113 and the second guide ring 21 are nested together. Then, the fixing part 51 of the second rotating member 5 is installed in the second mounting groove 42 of the second support arm 4, and the second rotating part 121 is inserted through it, so that the second elastic friction member 9 is located between the second rotating member 5 and the second side wall 12; subsequently, the snap-fit ​​part 53 passes through the second rotating part 121 and springs back, so that the snap-fit ​​lip plate 531 snaps into the inner side of the second side wall 12; then the fastening member 122 is installed from the inside to the outer periphery of the second rotating member 5, so that the cylindrical part 1221 is inserted into the rotating mating part 52, and the flange 1222 slides against the inner side of the second side wall 12, thereby completing the second side anti-detachment installation. Finally, the functional wire is inserted through the wiring channel 41 inside the second support arm 4, and enters the projector body 1 through the wiring channel 54 inside the second rotating member 5, and connects to the circuit or optical engine inside the body. Through the above assembly method, the assembly of the rotating structure and cable introduction can be completed without increasing the exposed wiring channel, which is beneficial to improving the integration of the whole machine.

[0041] It should be noted that the insertion sequence of the functional wires can also be advanced, that is, the functional wires can be pre-installed before the second rotating part 5 is installed, and the above effect can be achieved. In some embodiments, the fastening member 122 is not a necessary component. If the snap-fit ​​part 53 can maintain a stable snap-fit ​​effect after passing through the second rotating part 121, then the fastening member 122 does not need to be installed.

[0042] This embodiment also discloses a cannon barrel projector, such as Figures 1 to 5 As shown, the projector rotating structure, including any of the above embodiments, also includes a speaker base 30 and an optical engine; the optical engine is assembled inside the projector body 1; the speaker base 30 includes a base shell 31, and a first support arm 2 and a second support arm 4 are respectively fixed to both sides of the base shell 31 by fasteners. With this configuration, the projector body 1 can rotate relative to the speaker base 30 via the two support arms to adjust the projection angle. Furthermore, by combining the rotating structure with the speaker base 30, the base portion can simultaneously bear the functions of support and sound, thereby improving the overall space utilization of the device.

[0043] Furthermore, the speaker base 30 also includes a speaker cover 35. The base housing 31 and the speaker cover 35 enclose a speaker cavity 32. The speaker body 33 is provided inside the speaker cavity 32. The power interface 34 is provided on the surface of the base housing 31. A power supply adapter board 36 is installed inside the base housing 31. The power supply adapter board 36 is used for power and signal conversion. The speaker body 33 has functional wires. The functional wires pass through the wiring channel 41 and the wiring channel 54 in sequence to enter the projector body 1 for electrical connection.

[0044] Furthermore, the base housing 31 and the speaker cover 35 enclose each other to form a sealed acoustic cavity. Continuous ultrasonic welding lines are provided on the mating surfaces of the base housing 31 and the speaker cover 35, and ultrasonic welding seals the base housing 31 and the speaker cover 35 around their perimeter, thereby eliminating air leakage at the housing seams. The mating surfaces may also be provided with ultrasonic overflow grooves to accommodate overflow generated during the ultrasonic welding process.

[0045] An inner support 37 is fixed inside the sealed acoustic cavity. Locking posts 39 are provided on the front of the inner support 37; in this embodiment, two locking posts 39 are provided. The passive radiator 38 is locked to the locking posts 39 on the front of the inner support 37 by bolts or screws. A sealing compression structure is provided between the edge of the passive radiator 38 and the inner support 37 to ensure that the diaphragm installation position is airtight. The main speaker unit is assembled on the back of the inner support 37; in this embodiment, the speaker body 33 serves as the main speaker unit. Anti-vibration ribs may also be provided on the back of the inner support 37 to reduce vibration transmission and abnormal noise. It should be noted that in other embodiments, the passive radiator 38 can also be fixed to the inner support 37 by adhesive or other methods; therefore, no specific limitation is made here.

[0046] When the main speaker unit is powered on and vibrates, it compresses the air inside the sealed acoustic cavity. The pressure change inside the sealed acoustic cavity drives the passive radiator 38 to vibrate synchronously, thereby expanding the low-frequency radiation area and achieving a bass enhancement effect. Because the base shell 31 and the speaker cover 35 are ultrasonically welded to form a circumferential seal, and in conjunction with the wire hole sealing structure, the air pressure inside the sealed acoustic cavity can be kept stable, preventing air leakage from causing low-frequency attenuation.

[0047] The base housing 31 has a cable routing hole through which the main speaker cable or functional wire of the speaker body 33 passes. A sealing plug or adhesive sealing structure is provided at the cable routing hole to seal any air leakage. The functional wire sequentially passes through the cable routing hole, the cable routing channel within the second support arm 4, and the cable routing channel 54 within the second rotating component 5 before entering the projector body 1. Thus, the speaker base 30, while providing support, rotation, and cable routing, utilizes the base housing 31 and the speaker cover 35 to form a sealed acoustic cavity for a passive radiator, eliminating the need to purchase a pre-built speaker module with its own independent acoustic cavity.

[0048] With this configuration, the speaker body 33 can be integrated into the base, and the power supply adapter board 36 can realize the conversion of power, audio, and other signals between the base and the main body, thus completing multiple functions such as support, sound generation, and electrical connection within a limited space. Furthermore, the speaker cover 35 helps to improve the sealing effect of the front sound cavity and enhance sound quality. It should be noted that the speaker cover 35 and the base housing 31 can be fixed by ultrasonic welding, snap-fit ​​connection, screw connection, or adhesive bonding; the locking accessories can be screws, bolts, rivets, or insert locking structures.

[0049] Furthermore, the functional cables include power cables and / or audio signal cables. These cables pass through the inside of the second support arm 4 and enter the projector body 1 through the cable routing channel 54 of the second rotating component 5 to power the speaker and / or switch signals. This arrangement hides cables that might otherwise be exposed within the support and rotating components, reducing the impact of cables on the appearance and minimizing the risk of external wear, bending, and snagging. Furthermore, concentrating the functional cables through the second support arm 4 into the body avoids complex wiring on both sides, simplifying the overall assembly. It should be noted that, in addition to power cables and audio signal cables, the functional cables may also include control cables, ground wires, lamp board wires, sensor signal wires, or other low-voltage cables, as long as they can pass through the cable routing channel 41 and the cable routing channel 54 into the projector body.

[0050] Specifically, in one assembly embodiment, the speaker base 30 can be assembled first, that is, the speaker body 33 is placed inside the speaker cavity 32, and the power supply adapter 36 is installed inside the base housing 31. Then, the speaker cover 35 and the base housing 31 are enclosed to form a relatively closed cavity. Subsequently, the first support arm 2 and the second support arm 4 are respectively locked and fixed to both sides of the base housing 31. Then, the functional wires are passed through the inside of the second support arm 4 and guided into the projector body 1 through the second rotating component 5. Finally, the optical engine is installed in the projector body 1 and connected to the corresponding circuit. In the above manner, the rotating support, base speaker, power supply adapter, and projector body components can be assembled in the same whole unit, which is conducive to achieving a compact design and ensuring the integrity of the overall appearance of the unit.

[0051] It should be noted that, without altering the basic concept of this invention, some structures can be replaced with equivalent ones. For example, in addition to rubber rings, the first elastic friction element 8 and the second elastic friction element 9 can also be made of elastic corrugated rings, elastic gaskets, or composite friction pads; in addition to polyoxymethylene, the first rotating element 3 and the second rotating element 5 can also be made of nylon, polycarbonate, metal-embedded plastic structures, or engineering plastics containing lubricating fillers; in addition to C-shaped snap-fit ​​structures, the fastening element 122 can also be made of split limiting sleeves, elastic ring sleeves, or limiting rings with openings; in addition to Teflon gaskets, the wear-resistant pad 10 can also be made of low-friction coated gaskets or oil-containing self-lubricating gaskets; in addition to cylindrical or conical surface mating, the first guide convex ring 113 and the second guide convex ring 21 can also be made of arc-shaped mating surfaces. As long as the purpose of smooth rotation of the body relative to the base, damping maintenance, and wire insertion can be achieved, they can all be considered common alternative forms of this invention.

[0052] In summary, the projector rotating structure and cannon projector provided in this embodiment, by arranging the first rotating component 3, the second rotating component 5, and the cable routing channel 54 inside the projector body 1 or within the internal space enclosed by the body and the support arm, can reduce the exposed rotating structure and cables, maintain a clean and complete appearance, and improve space utilization. Furthermore, by connecting the cable routing channel 41 within the second support arm 4 with the cable routing channel 54 within the second rotating component 5, functional wires can be directly introduced into the projector body 1, thus balancing the needs of rotational support and internal wiring, and improving upon the problems of unsightly, easily worn, and difficult-to-wire exposed cables in existing systems. Damping is provided by the first elastic friction element 8 and the second elastic friction element 9, which can replace the complex and costly gear motor solution or hardware damping shaft solution, simplifying the structure and improving the manual adjustment feel; the snap-fit ​​lip plate 531, fastener 122, wear-resistant pad 10 and guide ring structure can further improve assembly convenience, rotational stability and long-term reliability; combined with the arrangement of the speaker base 30, speaker cavity 32, speaker body 33, power supply adapter plate 36 and optical engine, the functions of support, rotation, wiring, sound generation and projection can be centrally arranged in the limited space of the cannon projector.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rotating structure for a projector, characterized in that, include: The projector body has a first sidewall and a second sidewall that are arranged opposite to each other. The first sidewall is provided with a first rotating part, and the second sidewall is provided with a second rotating part. The first support arm is located on the outer side of the first sidewall; The first rotating component is located inside the projector body; the first support arm is connected to the first rotating component via a first rotating shaft, and the first rotating shaft passes through the first rotating part. The second support arm is located on the outer side of the second sidewall; The second rotating component passes through the second rotating part and extends into the inside of the projector body. One end of the second rotating component is fixed to the second support arm, and the other end is rotatably engaged with the inside of the second side wall. The second rotating component has a cable passage extending along its axial direction, and the second support arm has a cable routing channel. The cable routing channel is connected to the cable passage. The cable routing channel and the cable passage are used for the functional wires to pass through sequentially and enter the inside of the projector body.

2. The projector rotating structure as described in claim 1, characterized in that, The first support arm and the first rotating component are respectively located on both sides of the first rotating part to prevent the first sidewall from moving axially along the first rotating axis; The second rotating member is inserted through the second rotating part, with one end fixed to the second support arm and the other end provided with a snap-fit ​​lip plate. The snap-fit ​​lip plate is rotatably snapped into the inner side of the second side wall to prevent the second rotating member from coming out axially.

3. The projector rotating structure as described in claim 1, characterized in that, The second rotating component includes, in sequence along its axial direction, a fixing part, a rotating engagement part, and a snap-fit ​​part; the second support arm is provided with a recessed second assembly groove on the side facing the first support arm, the fixing part of the second rotating component is installed in the second assembly groove, and the two are fixed by a fixing component; the rotating engagement part passes through the second rotating part and rotates with it; the snap-fit ​​part is a snap-fit ​​lip plate installed at the end of the rotating engagement part; The snap-fit ​​lip plate and the rotating mating part are provided with a plurality of spacer grooves along their circumference, and the plurality of spacer grooves isolate the snap-fit ​​lip plate and the rotating mating part into a plurality of snap claws with radial elastic deformation; the snap-fit ​​lip plate is provided with a guide cone surface on the side away from the second support arm, and the guide cone surface is used to guide the snap-fit ​​lip plate to be inserted into the second rotating part.

4. The projector rotating structure as described in claim 3, characterized in that, A fastening element is provided on the inner side of the second sidewall. The fastening element includes a cylindrical part and a flange located at one end of the cylindrical part. The other end of the cylindrical part is inserted into the rotating fitting part of the second rotating part to prevent the pawl from deforming in the axial direction; The flange slides against the inner side of the second side wall; A cavity for accommodating the snap-fit ​​lip plate is formed between the flange, the inner side of the second side wall, and the cylindrical portion; The fastening component rotates synchronously with the second rotating component; A polytetrafluoroethylene tape is provided between the flange and the second sidewall.

5. The projector rotating structure as described in claim 1, characterized in that, The first rotating shaft is integrally formed with the first support arm and separately connected to the first rotating component, or integrally formed with the first rotating component and separately connected to the first support arm, or separately connected to both; the second rotating component is integrally formed with the second support arm, or separately fixed to the second support arm by a fixing component.

6. The projector rotating structure as described in claim 1, characterized in that, A first elastic friction element is provided between the first rotating component and the inner wall of the projector body; a second elastic friction element is provided between the second rotating component and the inner wall of the projector body. When the projector body rotates relative to the first support arm, the first elastic friction element is compressed and generates frictional resistance; When the projector body rotates relative to the second support arm, the second elastic friction element is compressed and generates frictional resistance.

7. The projector rotating structure as described in claim 1, characterized in that, At least one of the first rotating component and the second rotating component is a polyoxymethylene rotating component; The inner side of the first sidewall is provided with a recessed first assembly groove, the first rotating component is installed in the first assembly groove, and the depth of the first assembly groove is not less than the thickness of the first rotating component along its axial direction. The rotating mating part of the second rotating member passes through the second rotating part, and the fixing part of the second rotating member is installed in the second assembly groove of the second support arm. An assembly gap for accommodating the fixing part of the second rotating member is formed between the second side wall and the second support arm.

8. The projector rotating structure as described in claim 1, characterized in that, A wear-resistant pad is provided between the first sidewall and the first support arm; The first sidewall and the first support arm are provided with receiving grooves corresponding to the wear-resistant pad. The two receiving grooves are fastened together to form a receiving cavity. The wear-resistant pad is located in the receiving cavity, and the thickness of the wear-resistant pad is greater than the sum of the depths of the two receiving grooves, so that a rotation gap is formed between the first support arm and the first sidewall.

9. The projector rotating structure as described in claim 1, characterized in that, The first rotating part extends outward from the first sidewall to form a first guide protrusion ring, and the first support arm is provided with a second guide protrusion ring extending towards the first sidewall on the side facing the first sidewall. The first guide protrusion ring and the second guide protrusion ring are nested and slide against each other. The first support arm is provided with a third assembly groove on the side facing the first sidewall, and the second guide protrusion is disposed in the third assembly groove. The mating surfaces of the first guide protrusion and the second guide protrusion are cylindrical surfaces or conical surfaces.

10. The projector rotating structure as described in claim 1, characterized in that, The first rotating shaft and the first rotating component are fixed by a locking component, which includes a machine screw and a copper nut. The shaft core of the first rotating shaft has a hollow portion, and the copper nut is embedded in the hollow portion. The machine screw passes through the first rotating component and extends into the hollow portion of the first rotating shaft, and is threadedly engaged with the copper nut to lock the first rotating shaft and the first rotating component. The machine screw is coated with anti-loosening adhesive.

11. A cannon barrel projector, characterized in that, The projector includes the rotating structure as described in any one of claims 1-10, and further includes a speaker base and an optical engine; the optical engine is assembled inside the projector body; the speaker base includes a base shell, and the first support arm and the second support arm are respectively fixed to both sides of the base shell by fasteners.

12. The cannon projector as described in claim 11, characterized in that, The speaker base also includes a speaker cover, and the base shell and the speaker cover are sealed by ultrasonic welding to form a sealed acoustic cavity; the speaker body is provided inside the sealed acoustic cavity, and a power interface is provided on the surface of the base shell; The base housing contains a power supply adapter board, which is used for power and signal conversion. The speaker body has a functional wire, which passes through the wiring channel and the cable passage in sequence to enter the internal electrical connection of the projector body. The speaker base is also equipped with an inner support and a passive radiator; The inner support is fixed inside the sealed acoustic cavity; The passive radiator is mounted on the inner bracket, and the horn body is used to drive the passive radiator to vibrate.

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