A rotary grating imaging device

Abstract

The utility model discloses a kind of rotary grating imaging devices, including the fixed base of the cavity with top opening inside, rotating base is contained in the cavity and is rotated with it, the inner edge of fixed base top opening is equipped with the bending portion extending downward, the bottom surface of bending portion is equipped with arc convex, rotating base periphery outside is equipped with step structure, arc convex and the lower tread of step structure abut, constitute first sliding support pair, realize fixed base and rotating base between vertical downward support and low friction sliding;The periphery of fixed base top opening is equipped with annular first groove, cylindrical grating cover bottom is inserted into the first groove;Rotating base top periphery is equipped with annular third groove, the third groove is located the first groove radial inside, sheet image card bottom is inserted into third groove.The utility model is characterized by: both guarantee each system independent stable operation, reduce assembly difficulty and cost, meet miniaturization, portable multimode sound and light play demand.

Description

Technical Field

[0001] This utility model relates to the field of grating lamp technology, specifically a rotating grating imaging device. Background Technology

[0002] Lattice animation, a technique that utilizes the principle of visual persistence to achieve dynamic display or stereoscopic depth effects, has long been widely used in toys, display devices, and decorative lighting. Its basic principle involves superimposing a lenticular sheet with slits onto an image sheet printed with staggered multi-frame micro-stripes. Through the relative displacement between the two, the lenticular slits selectively expose different micro-stripes on the image sheet sequentially, thus creating a continuous animation or a visual effect with a sense of depth to the human eye. However, current technologies often achieve this relative displacement through manual rotation or simple mechanical drives, which suffer from problems such as unstable rotation, image jitter, and poor alignment accuracy between the lenticular sheet and the image, resulting in disjointed animation effects and a poor visual experience.

[0003] Furthermore, existing lenticular animation devices generally lack effective light source design, with most relying on ambient light or simple point light sources. This results in uneven light distribution and insufficient brightness, making it difficult to fully stimulate the visual coupling effect between the lenticular slits and the micro-strips of the image. Consequently, the animation display is dim and details are blurred, especially in low-light environments. While some devices have built-in light sources, the spatial arrangement between the light source, the lenticular lens, and the image is unreasonable, failing to create a uniform and controllable internal illumination system, thus failing to effectively improve image contrast and dynamic clarity.

[0004] As consumers increasingly demand multifunctional interactive experiences, lenticular devices with only visual output can no longer meet market expectations. However, most current lenticular animation products are functionally limited, offering only static display or simple animation playback capabilities, lacking sound recording and playback functions, and thus unable to achieve synchronized multimodal interaction. Even in devices with audio output, the recording and speaker modules are independent of the lenticular rotation mechanism, lacking integrated design. This results in a loose structure, complex wiring, and sound acquisition and playback susceptible to mechanical vibration interference, leading to degraded sound quality and a limited user experience.

[0005] More critically, existing devices do not adequately consider the support stability and friction control of rotating components in their structure. Rotating mechanisms often employ single-point support or sliding contact, which easily leads to eccentric oscillations or jamming. Especially during long-term operation or high-speed rotation, rotational stability is difficult to guarantee, affecting the precise relative motion between the grating and the image, thus disrupting the continuity and stability of the animation. Simultaneously, the lack of effective friction-reducing design between the rotating drive mechanism and the support structure results in high frictional resistance, high energy consumption, and a tendency to generate wear debris, affecting the device's lifespan and operational reliability.

[0006] Existing raster animation devices have significant shortcomings in achieving stable and controllable relative rotation between image cards and raster cards. They also have weak light source system design and lack integrated sound interaction functions, making it difficult to provide a high-quality, multimodal audio-visual playback experience.

[0007] Therefore, there is an urgent need for a new type of grating imaging device that is compact, rotates smoothly, provides uniform illumination, and has recording and playback functions, in order to overcome the above-mentioned defects and improve the visual effects and interactive performance of grating animation. Utility Model Content

[0008] The purpose of this invention is to overcome the shortcomings of the prior art and provide a rotating grating imaging device to achieve stable and controllable relative rotation of the grating animation device between the image card and the grating card, provide an active light source system, integrate sound interaction functions, and provide a high-quality, multimodal audio-visual playback experience.

[0009] To achieve the above objectives, a rotating grating imaging device is designed, comprising a fixed base and a rotating base. The fixed base has a cavity with a top opening, and the rotating base is housed in and rotates within this cavity. The inner edge of the top opening of the fixed base has a downwardly extending bent portion, and the bottom surface of the bent portion has an arc-shaped protrusion. The outer periphery of the rotating base has a stepped structure, and the arc-shaped protrusion abuts against the lower tread of the stepped structure, forming a first sliding support pair, realizing vertical downward support and low-friction sliding between the fixed base and the rotating base. The top opening of the fixed base has an annular first groove, and the bottom of the cylindrical grating cover is inserted into the first groove. The top periphery of the rotating base has an annular third groove, which is located radially inside the first groove, and the bottom of the sheet-like image card is inserted into the third groove. The fixed base also has a driving mechanism for driving the rotating base to rotate.

[0010] Preferably, the present invention further includes: the gap between the image card and the grating cover in the radial direction is 1mm to 1.5mm.

[0011] Preferably, the present invention further includes: a second sliding support pair is provided between the fixed base and the rotating base, including: an annular groove with an opening facing downward at the bottom of the rotating base; a strip-shaped protrusion at the top of a vertically arranged bracket in the cavity of the fixed base extending into the groove; the strip-shaped protrusion having an inclined surface that forms line contact with the groove; a sliding ring horizontally placed above the PCB board; the lower end face of the groove abutting against the upper end face of the sliding ring; the strip-shaped protrusion of the bracket passing through the arc-shaped through hole of the PCB board and embedded in the arc-shaped through groove of the sliding ring; the bracket also having a sliding ring step structure; the lower step surface of the sliding ring step structure abutting against the lower end face of the sliding ring, forming support for the sliding ring.

[0012] Preferably, the present invention further includes: the driving mechanism includes: a fixed motor disposed in the fixed base, and a gear disposed on the rotating shaft of the motor meshing with a gear ring on the inner side of the open structure at the bottom of the rotating base to drive the rotating base to rotate relative to the fixed base.

[0013] Preferably, the present invention further includes: a horizontally fixed PCB board inside the fixed base, an LED light in the middle of the PCB board, a through light guide hole in the middle of the rotating base, the light from the LED light entering the light box located above the rotating base through the light guide hole, and the light inside the light box illuminating the image card and the grating cover from the inside out.

[0014] Preferably, the present invention further includes: the sidewall of the light guide hole extends from top to bottom and has a conical structure that is wider at the top and narrower at the bottom, for converging the LED light rays; a slot is provided around the light guide hole, and a buckle is provided at the bottom of the light box, and the light box is fixed to the rotating base by the buckle and the slot and rotates synchronously with it.

[0015] Preferably, the present invention further includes: a battery compartment at the bottom of the fixed base for installing a battery and supplying power to the device; or, a charging hole at the bottom of the fixed base for electrically connecting to the device to achieve external power supply.

[0016] Preferably, the present invention further includes: a recorder and a speaker integrated in the fixed base, and a button (93) electrically connected to the recorder and the speaker on the outside of the fixed base for controlling the opening and closing of the device; the audio recorded by the recorder is stored in a storage medium in the fixed base, and the speaker plays the audio stored in the storage medium.

[0017] Preferably, the present invention further includes: the bottom of the fixed base is provided with a plurality of sound holes for sound to enter the recorder and to exit the speaker, and a support foot is provided so that the bottom of the base and the support surface form a gap to form a sound transmission channel.

[0018] Preferably, the present invention further includes: a top cover disposed on the top of the grating cover, the bottom of the top cover having an annular second groove for the top of the grating cover to be inserted; the grating cover and the image card are both replaceable sheet-like bodies, which are installed by plugging and unplugging through the first groove and the third groove respectively, so as to realize the combination of different grating patterns and image content.

[0019] Compared with the prior art, the advantages of this utility model are: This invention utilizes a first and second sliding support pair arranged vertically between a fixed base and a rotating base to form a bidirectional, low-friction, stable rotating structure. This ensures that the rotation of the image card relative to the grating cover remains smooth and jitter-free, guaranteeing precise scanning of misaligned micro-strips by the grating slits, resulting in continuous, clear animation without frame skipping or visual breaks. The line contact design of the arc-shaped protrusions and the beveled nipple-shaped protrusions significantly reduces frictional resistance and extends service life. LED lights converge through a light guide hole (wider at the top, narrower at the bottom) to evenly illuminate the semi-transparent lightbox, achieving full-area diffuse reflection illumination from the inside out, improving image contrast and brightness uniformity, and achieving high-saturation dynamic images even in dark environments. The recorder and speaker integrated into the fixed base achieve clear sound pickup and playback through an air channel formed by the bottom sound hole and the support feet, avoiding mechanical resonance interference and supporting user-recorded and played personalized audio, expanding interactive dimensions. Both the grating cover and the image card adopt a pluggable chip structure, allowing for quick replacement of different pattern combinations and content diversification without replacing the entire device. The overall structure is compact, with the rotation, lighting, and sound functions modularly integrated inside the base. This ensures the independent and stable operation of each system while reducing assembly difficulty and cost, thus meeting the needs for miniaturized, portable, multimodal sound and light playback. Attached Figure Description

[0020] Figure 1 This is a front view of the present invention; Figure 2 yes Figure 1 Sectional view at point AA; Figure 3 yes Figure 1 Sectional view at BB; Figure 4 yes Figure 1 Sectional view at CC; Figure 5 This is a rear-view perspective view of the present invention; Figure 6 This is a sectional view at 5E-E; Figure 7 This is a perspective view of the cavity inside the fixed base; Figure 8 This is a partial perspective view of the cavity containing the PCB board, with the fixed base concealed. Figure 9 This is a partial perspective view of the cavity of the fixed base with the slip ring hidden. Figure 10 It is a partial perspective view of the cavity of the fixed base, with the motor and PCB board hidden. Figure 11 This is a rear perspective view of the present invention with the bottom of the fixing base hidden. Figure 12 This is a rear perspective view of the present invention with the fixed base removed; Figure 13This is a rear-view perspective view of the meshing relationship between the motor, gear, and gear ring of this utility model; Figure 14 yes Figure 1 Sectional view at DD; In the picture: 1 Fixed base, 11 First groove, 12 Bending part, 121 Arc-shaped protrusion, 13 Bracket, 131 Strip-shaped protrusion, 132 Slip ring step structure, 14 Battery compartment, 15 Charging port, 16 Sound hole, 17 Support foot; 2 Rotating base, 21 Third groove, 22 Gear ring, 23 Light guide hole, 231 Slot, 232 Conical structure, 24 Stepped structure, 241 Lower tread, 25 Annular slide groove; 3. Grating cover; 4. Top cover, 41. Second groove; 5. Image card; 6. Motor, 61. Gear; 7 PCB board, 71 LED light, 72 slip ring, 721 arc-shaped through groove, 73 arc-shaped through hole; 8 light boxes, 81 clips; 91. Recorder, 92. Speaker, 93. Button. Detailed Implementation

[0021] To make the purpose, principle and structure of this utility model clearer, the following description is provided in conjunction with the accompanying drawings and specific embodiments.

[0022] This utility model provides a rotating grating imaging device, see [link to related document]. Figures 1-14 .

[0023] The overall structure is shown in the figure. The device consists of a fixed base 1, a rotating base 2, a grating cover 3, an image card 5, a light box 8, a top cover 4, a motor 6, a PCB board 7, a recorder 91, a speaker 92, and auxiliary support components.

[0024] The fixed base 1 is a cylindrical injection-molded part with an open top. The inner edge of the opening extends outwards and then downwards to form a bent portion 12. The lower surface of the bent portion 12 has an integrally formed semi-circular arc-shaped protrusion 121. The top of the fixed base 1 has an annular first groove 11 for inserting a grating cover 3 with a similar width and thickness to the first groove 11 to form an interference fit. The surface of the grating cover 3 has several transparent slits. The top of the grating cover 3 fits into a second groove 41 at the bottom of the top cover 4. The second groove 41 has the same dimensions as the first groove 11, thus forming a closed cylindrical shell together with the fixed base 1.

[0025] The rotating base 2 is a cylindrical injection-molded part with an outer diameter smaller than the inner diameter of the opening of the fixed base 1. The outer periphery of the rotating base 2 is provided with a stepped structure 24. The lower tread surface 241 of the stepped structure 24 abuts against the arc-shaped protrusion 121 on the bottom surface of the bent part 12, forming a first sliding support pair with line contact. This contact provides vertical downward support for the rotating base 2 and reduces friction. In this design, since the lower tread surface 241 of the step mechanism 24 is a planar structure, and the arc-shaped protrusion 121 is an arc-shaped protrusion 121 structure (which can be a spherical or continuous curved surface, and its cross-section is arc-shaped), compared with the surface-to-surface contact between planes, the arc-shaped protrusion 121 and the lower tread surface 241 are tangent to the arc and the straight line in cross-section. In the three-dimensional physical system, they are also line-to-surface contact, which greatly reduces the friction area between the two, thus reducing the friction force. This allows the rotating base 2 and the fixed base 1 to achieve stable support (both sliding support pairs are arranged in a ring) and relative rotational motion under low friction force, extending the service life of the device while reducing the processing complexity, assembly complexity and component production cost.

[0026] A third groove 21 is provided 10 mm radially inside the first groove 11 at the top periphery of the rotating base 2. The groove size is the same as the first groove 11 and the image card 5 with a thickness similar to the groove width of the third groove 21 is inserted into the third groove 21 to form an interference fit. The radial gap between the outer surface of the image card 5 and the inner surface of the grating cover 3 is maintained at 1 mm to 1.5 mm to ensure that the grating slits accurately cover the image microstrips.

[0027] The bottom surface of the rotating base 2 has an annular groove 25 with an opening facing downwards, and the cross-section of the annular groove 25 is concave.

[0028] Three supports 13 are erected at 120 degrees within the cavity of the fixed base 1. The supports 13 can be vertically arranged curved structures. A strip-shaped protrusion 131 is provided at the top of the support 13. The strip-shaped protrusion 131 is distributed along the top surface of the curved support 13 in an arc. The upper surface of the strip-shaped protrusion 131 is formed with an inclined surface with an angle. The inclined surface forms line contact with the top wall of the annular sliding groove 25, forming a second sliding support pair.

[0029] It also includes a slip ring 72 made of a low-friction material disposed between the fixed base 1 and the rotating base 2. The slip ring 72 has several arc-shaped grooves 721 along its circumference, through which the top of the bracket 13 passes. A slip ring step structure 132 is provided in the middle section of the bracket 13, with the lower surface of the slip ring step structure 132 supporting the rigid slip ring 72. The tread surfaces of the slip ring step structures 132 of the brackets 13 form intermittent annular support surfaces, the inner diameter of which is larger than the outer diameter of the arc-shaped grooves 721, and smaller than the outer diameter of the slip ring 72. The upper surface of the slip ring 72 is in contact with the lower end face of the annular groove 25, providing vertical upward support for the rotating base 2.

[0030] Because the slip ring 72 is made of a low-friction material and the annular groove 25 has a concave cross-section (the friction area at the groove opening is smaller), the friction between the two can achieve a lower coefficient of friction compared to friction between two completely flat surfaces. Furthermore, the top of the bracket 13 and the annular groove 25 initially form friction between the inclined surface and the concave groove; this friction is a line-to-surface contact friction with an extremely low coefficient of friction. However, after prolonged use, the inclined surface at the top of the bracket 13 will experience material wear due to prolonged friction, increasing the friction area between the two. If this is not suppressed, it will become friction between completely flat surfaces, increasing friction and reducing the smoothness of rotational movement between the fixed base 1 and the rotating base 2. Therefore, a slip ring 72 was further designed. When the material friction loss between the top of the bracket 13 and the annular groove 25 reaches a certain level, the height between them will decrease. At this time, the groove opening of the annular groove 25, which was originally in slight contact, and the slip ring 72 gradually approach each other, and the contact depth gradually increases, eventually forming full contact between the groove opening and the slip ring 72. Although the groove opening and the slip ring 72 are also in surface-to-surface contact, their friction area has been reduced compared to the traditional complete surface-to-surface contact, and further friction loss between the top of the bracket 13 and the annular groove 25 can be suppressed. The top of the bracket 13 and the annular groove 25, and the slip ring 72 and the annular groove 25, together form the second sliding support pair with the dual protection design.

[0031] The bracket 13 passes sequentially through the arc-shaped through hole 73 on the PCB board 7 and the arc-shaped through groove 721 on the slip ring 72, thereby supporting and circumferentially limiting the slip ring 72. The two ends of the PCB board 7 are heat-fused to the inner wall of the fixed base 1 or fixed inside the fixed base 1 through the connecting posts on the fixed base 1, and several square LED lights 71 are welded in the middle.

[0032] A light guide hole 23 is formed at the center of the rotating base 2. The light guide hole 23 extends downwards with a conical structure 232 until it reaches the square LED light 71 on the PCB board 7. Preferably, the light guide hole 23 narrows in a neck shape from top to bottom, forming a structure that is wider at the top and narrower at the bottom, which can focus the light from the LED light 71 upwards. Several L-shaped slots 231 are evenly distributed around the periphery of the light guide hole 23, and several elastic buckles 81 are correspondingly provided at the bottom of the light box 8. The light box 8 is located radially inside the image card 5. The light box 8 is fixed to the rotating base 2 by the buckles 81 and rotates synchronously with it. The light box 8 is made of semi-transparent diffuse PC material, which can evenly scatter light onto the image card 5 and the grating cover 3.

[0033] The base 1 is fixed to the bottom of the geared motor 6 with screws, and a gear 61 is press-fitted onto the output shaft of the motor 6. The bottom surface of the rotating base 2 has an open structure facing downwards, and an internal gear ring 22 is integrally formed on the inner wall of the open structure of the rotating base 2. The gear 61 meshes with the gear ring 22. Preferably, the transmission ratio between the motor 6 and the gear ring 22 is controlled by adjusting the molding module and number of teeth of the gear 61 and the gear ring 22. For example, if the rated speed of the motor 6 is 3,000 rpm, the module of the gear 61 is 0.5 and the number of teeth is 10, and the module of the gear ring 22 is 0.5 and the number of teeth is 100, after reduction, the rotating base 2 rotates at 300 rpm, which can form 50 frames of image switching per second on the rotating image card 5, meeting the requirements of continuous animation.

[0034] The bottom of the fixed base 1 also has a battery compartment 14, which contains a battery. The positive and negative terminals of the battery are connected to the power pads of the PCB board 7 via spring sheets. Alternatively, an external power supply can be connected to the charging hole 15 reserved on the side wall, which will be regulated and used by the modules. The PCB board 7 integrates a microcontroller, an audio codec chip, flash memory storage, and a motor drive MOSFET. Multiple touch buttons 93 are embedded on the outside of the fixed base 1 to control the power supply, motor start / stop, recording and playback start / stop, and also includes an initialization button.

[0035] Press the light button to turn LED 71 on or off. Press the motor control button to control motor 6 to run at the set speed or stop. Press the record button to start the recorder 91 to pick up sound; the sampled audio is then stored in the flash memory. Press the play button to start the speaker 92 to read the stored audio and output it through the amplifier.

[0036] A sound hole 16 consisting of several through holes is opened at the bottom of the fixed base 1 corresponding to the position of the speaker 92. Several support feet 17 with a certain thickness are provided on the bottom surface of the fixed base 1. A gap is formed between the bottom surface of the fixed base 1 and the table, which ensures that the sound waves can propagate freely and prevents the table from reflecting and causing howling.

[0037] During assembly, first install the bracket 13, PCB board 7, slip ring 72, and motor 6 into the fixed base 1, then fasten and rotate the base 2 so that the gear ring 22 meshes with the gear 61, and the annular groove 25 contacts the strip protrusion 131 of the bracket 13 and the slip ring 72 simultaneously, forming double support from the top and bottom. Then insert the light box 8, image card 5, grating cover 3, and top cover 4 in sequence, and finally install the battery.

[0038] During operation, motor 6 drives rotating base 2 to rotate image card 5 and light box 8 synchronously. grating cover 3 remains stationary. The light from LED lamp 71 is focused through light guide hole 23 and illuminates light box 8. Light box 8 projects uniformly diffused light onto image card 5. Grating slits sequentially sweep across the image microstrips on image card 5, forming continuous animation using visual persistence. Users can record audio on-site and play it back instantly, achieving a multimodal experience with synchronized sound and image.

[0039] When changing content, simply pull out the top cover 4, the raster cover 3, and the image card 5 to quickly replace different theme patterns and sounds. No tools are required, and the operation is simple.

[0040] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. A rotating grating imaging device, characterized in that, It includes a fixed base (1) and a rotating base (2). The fixed base (1) has a cavity with an open top, and the rotating base (2) is accommodated in the cavity and rotates with it. The fixed base (1) has a downwardly extending bent part (12) at the inner edge of the top opening. The bottom surface of the bent part (12) has an arc-shaped protrusion (121). The outer periphery of the rotating base (2) has a stepped structure (24). The arc-shaped protrusion (121) abuts against the lower step surface (241) of the stepped structure (24) to form the first sliding support pair, realizing vertical downward support and low friction sliding between the fixed base (1) and the rotating base (2). The fixed base (1) has an annular first groove (11) around the top opening, and the bottom of the cylindrical grating cover (3) is inserted into the first groove (11). The rotating base (2) has an annular third groove (21) on the top periphery. The third groove (21) is located radially inside the first groove (11), and the bottom of the sheet-shaped image card (5) is inserted into the third groove (21). The fixed base (1) is also provided with a drive mechanism for driving the rotating base (2) to rotate.

2. The rotating grating imaging device as described in claim 1, characterized in that, The radial gap between the image card (5) mounted on the third groove (21) and the grating cover (3) is 1 mm to 1.5 mm.

3. The rotating grating imaging device as described in claim 1, characterized in that, A second sliding support pair is also provided between the fixed base (1) and the rotating base (2), including: An annular groove (25) with the bottom opening facing downward is provided on the rotating base (2). The strip-shaped protrusion (131) at the top of the vertically arranged bracket (13) in the cavity of the fixed base (1) extends into the groove (25). The strip-shaped protrusion (131) has an inclined surface that forms a line contact with the groove (25). The slip ring (72) is placed horizontally above the PCB board (7), and the lower end face of the groove (25) abuts against the upper end face of the slip ring (72). The strip-shaped protrusion (131) of the bracket (13) passes through the arc-shaped through hole (73) of the PCB board (7) and is embedded in the arc-shaped through groove (721) of the slip ring (72). The bracket (13) is also provided with a slip ring step structure (132). The lower step surface of the slip ring step structure (132) abuts against the lower end face of the slip ring (72) to support the slip ring (72).

4. The rotating grating imaging device as described in claim 1, characterized in that, The drive mechanism includes: A fixed motor (6) is installed inside the fixed base (1). A gear (61) on the rotating shaft of the motor (6) meshes with a gear ring (22) on the inner side of the open structure at the bottom of the rotating base (2) to drive the rotating base (2) to rotate relative to the fixed base (1).

5. The rotating grating imaging device as described in claim 1, characterized in that, A PCB board (7) is horizontally fixed inside the fixed base (1). An LED light (71) is provided in the middle of the PCB board (7). A light guide hole (23) is provided in the middle of the rotating base (2). The light from the LED light (71) enters the light box (8) located above the rotating base (2) through the light guide hole (23). The light inside the light box (8) illuminates the image card (5) and the grating cover (3) from the inside out.

6. The rotating grating imaging device as described in claim 5, characterized in that, The sidewall of the light guide hole (23) extends from top to bottom and has a tapered structure (232) that is wider at the top and narrower at the bottom, which is used to converge the light from the LED lamp (71); The light guide hole (23) is provided with a slot (231) around its periphery, and the bottom of the light box (8) is provided with a buckle (81). The light box (8) is fixed to the rotating base (2) by the buckle (81) and the slot (231) and rotates synchronously with it.

7. The rotating grating imaging device as described in claim 1, characterized in that, The fixed base (1) has a battery compartment (14) at the bottom for installing batteries and supplying power to the device; Alternatively, a charging hole (15) is provided at the bottom of the fixed base (1) to be electrically connected to the device to realize external power supply.

8. The rotating grating imaging device as described in claim 1, characterized in that, The fixed base (1) integrates a recorder (91) and a speaker (92). A button (93) electrically connected to the recorder (91) and the speaker (92) is provided on the outside of the fixed base (1) for controlling the opening and closing of the device. The audio recorded by the recorder (91) is stored in the storage medium inside the fixed base (1), and the speaker (92) plays the audio stored in the storage medium.

9. The rotating grating imaging device as described in claim 8, characterized in that, The fixed base (1) has several sound holes (16) at the bottom for sound to enter the recorder (91) and to exit the speaker (92), and is provided with support feet (17) so that the bottom of the base and the support surface form a gap to form a sound transmission channel.

10. The rotating grating imaging device as described in claim 2, characterized in that, It also includes a top cover (4) set on the top of the grating cover (3), and the bottom of the top cover (4) is provided with an annular second groove (41) for the top of the grating cover (3) to be inserted; The grating cover (3) and the image card (5) are both replaceable sheet-like objects, which are installed by plugging and unplugging through the first groove (11) and the third groove (21) respectively, so as to realize the combination of different grating patterns and image content.

Images