CN105889848B - A kind of dynamic projection night-light - Google Patents

Abstract

The present invention relates to the field of projection lamps, in particular to a dynamic projection night lamp capable of autonomous swing, comprising a casing and a movement inside the casing. Heavy block, the bottom of the shell is a spherical structure, the movement includes a frame, a light source projection device and a film rolling device, and an eccentric device is also installed at the bottom of the movement. The present invention has a tumbler-based structure, which can naturally stand up and swing after being pushed down. A light source projection device and a film rolling device are provided inside the housing, and a projection window is provided on the top of the housing. The light source projection device irradiates parallel light on the rolling film. In the projection area on the ceiling, an ever-changing pattern is formed on the ceiling. In addition, an eccentric device is installed between the bottom plate of the movement and the counterweight to realize the independent swing action based on the principle of the tumbler, making the entire projection night light more dynamic. , which is more interactive.

Description

A dynamic projection night light

technical field

The invention relates to the field of projection lamps, in particular to a dynamic projection night lamp capable of autonomous swing.

Background technique

The main function of the projection lamps on the market is to project changing patterns or colored lights on the ceiling or walls, such as desktop projection lamps placed on the table, and projections of rotatable spherical structures suspended on the ceiling Lamp, the above two types of projection lamps only have the function of projecting patterns or lights, and cannot interact with practical objects. They can only be used as lamps, and their functions are relatively single.

Projector lamps with more functions have certain market potential, such as having certain interactivity on the basis of patterns or light projection functions, and possessing the function of toys. Therefore, there is an urgent need to develop projection lamps with interactive functions suitable for infants or older children.

Contents of the invention

The purpose of the present invention is to address the deficiencies of the prior art, a dynamic projection night light, the projection night light has a tumbler-based structure, the bottom of the shell is provided with a spherical or cylindrical structure, and the bottom of the shell is provided with a counterweight , can stand up and swing naturally after being pushed down, a light source projection device and a film rolling device are provided inside the casing, and a projection window is provided on the top of the casing, through which the light source projection device irradiates parallel light rays on the projection area on the rolling film, and The changing pattern is projected on the ceiling through the projection window, forming an ever-changing pattern. In addition, an eccentric device is installed between the bottom plate of the movement and the counterweight. In the working state, the position of the center of gravity of the entire device is constantly changed by the eccentric device, so as to realize the independent swing action based on the principle of the tumbler, that is, to realize the pattern projection. At the same time, it can swing continuously, making the whole projection night light more dynamic.

In order to solve the above problems, the present invention provides the following technical solutions:

A dynamic projection night light, comprising a casing and a movement inside the casing;

There is a projection window on the top of the casing, and a transparent top cover is installed on the projection window, the bottom of the casing is a spherical surface, and a counterweight is provided at the bottom of the casing to make the casing look like a tumbler;

The movement includes a frame, a controller, a storage battery, a light source transmission device and a film rolling device. The light source transmission device and the film rolling device are powered. The film rolling device includes a drive mechanism controlled by the controller and a film that is driven to circulate and roll by the drive mechanism. The film is located between the light source transmission device and the transparent top cover. The light source transmission device generates upward Projecting light, which is projected onto the imaging surface after being transmitted through the film and the transparent top cover in turn;

It also includes an eccentric device connected with the driving mechanism of the film rolling device, and the eccentric device constantly changes the center of gravity of the shell under the driving action of the driving mechanism of the film rolling device, so that the shell can swing autonomously.

Further, the frame includes a base plate, an upper support body and a lower support body, the lower support body is fixedly connected to the base plate by bolts, the bottom of the upper support body is connected to the lower support body by bolts, and the lower support body is installed on the bottom of the base plate. Central position; the upper support body includes a front frame and a rear frame, both of which are rectangular structures, and on both sides of the upper end of the upper support body, there are first roller shafts and second rollers for connecting the front frame and the rear frame Shaft, the third roller shaft is arranged in the middle part of the lower end of the upper bracket body, the third roller shaft, the first roller shaft and the second roller shaft form an inverted triangle film mounting bracket, and the film is installed on the film mounting bracket and kept in tension state, the first roller shaft and the second roller shaft are driven shafts, the third roller shaft is a driving shaft, and the driving mechanism of the film rolling device is in transmission connection with the third roller shaft.

Further, the first roller shaft, the second roller shaft and the third roller shaft all include a shaft core and a shaft sleeve, and the two ends of the shaft cores of the first roller shaft and the second roller shaft are respectively fixedly connected to the front frame and the rear frame , the bushings of the first roller and the second roller are fit on the shaft core with gaps, the bushings of the third roller are tightly fitted on the shaft core, and both ends of the bushing are provided with limiting edges.

Further, the driving mechanism of the film rolling device includes a roller shaft driving motor, which is installed on the lower support body and located directly below the third roller shaft, and a driving gear is installed on the output shaft of the roller shaft driving motor. A driven gear meshed with the driving gear is installed at the end of the third roller shaft.

Further, the light source projecting device is installed inside the film mounting bracket of the upper bracket body, the light source projecting device includes a light source generating device and a light-transmitting plate, the light source generating device is fixedly connected to the upper bracket body through a light source mounting bracket and is located on the second Directly above the three rollers, the light-transmitting plate is fixedly connected to the upper support body through the light-transmitting plate mounting frame and is located directly above the light source generating device.

Further, the light source mounting frame includes a first mounting plate bolted to the front frame and a second mounting plate bolted to the rear frame, the front and rear ends of the light source generating device are respectively connected to the first mounting plate and the second mounting plate Bolt connection; the light-transmitting plate mounting frame includes a third mounting plate, a fourth mounting plate and a light-shielding plate. There is a light-shielding plate on the left and right sides of the light-transmitting plate, and the upper and lower ends of the inner side of the light-shielding plate are provided for clamping. The strip-shaped protrusion of the light-transmitting plate, the third mounting plate is fixedly connected with the front frame through bolts, the fourth mounting plate is fixedly connected with the rear frame through bolts, and the front and rear sides of the shading plate are respectively connected with the third mounting plate and the fourth mounting plate through bolts. Mounting plate bolted.

Further, the eccentric device includes an eccentric disc, a drive shaft and a gear set, and a connecting shaft protrudes downward from the center of the bottom of the bottom plate, and a shaft hole matching the connecting shaft is opened on the eccentric disc, and the eccentric disc can rotate around the The connecting shaft rotates, the shaft hole is set eccentrically on the eccentric disc, the upper surface of the eccentric disc is provided with a disc-shaped groove centered on the shaft hole, the inner wall of the groove is provided with an inner gear, and the drive shaft is installed in the disc-shaped groove Inside, the drive shaft is equipped with a transmission gear that meshes with the ring gear. The gear set includes the first bevel gear installed on the output end of the roller shaft drive motor and the second bevel gear installed on the drive shaft. There are holes on the bottom plate for driving The positioning hole through which the upper part of the shaft passes, the function of the positioning hole is to position the drive shaft, and the second bevel gear is installed on the upper end of the drive shaft and meshes with the first bevel gear.

Further, an annular groove is also provided in the disc-shaped groove, and a lower positioning protrusion is provided on the lower end of the drive shaft to fit in clearance with the annular groove.

Further, the eccentric device is also provided with mounting bolts for mounting the eccentric disk on the bottom of the base plate, and a threaded hole is provided at the lower end of the connecting shaft to thread the mounting bolts, and through the mounting bolts, the bottom of the eccentric disk Mounted with plain bearings.

Further, the shell includes a left shell and a right shell, the left shell is provided with a shell bottom, the bottom of the shell bottom is a spherical structure, and the tops of the left shell and the right shell are provided with oblate notches , two oblate notches constitute the projection window.

Beneficial effects: a dynamic projection night light of the present invention has a tumbler-like structure, the bottom of the shell is provided with a spherical or cylindrical structure, and the bottom inside the shell is provided with a counterweight, which can stand up and swing naturally after being pushed down , the inside of the housing is provided with a light source projection device and a film rolling device, and the top of the housing is provided with a projection window, through which the light source projection device irradiates parallel light rays on the projection area on the rolling film, and projects changing patterns on the ceiling through the projection window , forming an ever-changing pattern. In addition, an eccentric device is installed between the bottom plate of the movement and the counterweight. In the working state, the position of the center of gravity of the entire device is constantly changed by the eccentric device, so as to realize the independent swing action based on the principle of the tumbler, that is, to realize the pattern projection. At the same time, it can swing continuously, making the whole projection night light more dynamic and more interactive.

Description of drawings

Fig. 1 is a sectional structure schematic diagram one of the utility model;

Fig. 2 is the sectional structure schematic diagram two of the utility model;

Fig. 3 is the three-dimensional exploded structure schematic diagram of the utility model;

Fig. 4 is the schematic diagram of the three-dimensional decomposition structure of the movement in the utility model;

Fig. 5 is a schematic diagram of a three-dimensional decomposition structure of the light-transmitting plate mounting frame in the utility model;

Fig. 6 is the enlarged schematic view of place A in Fig. 5;

Fig. 7 is a three-dimensional exploded schematic diagram of the upper support body in the utility model;

Fig. 8 is the enlarged schematic diagram of place B in Fig. 7;

Fig. 9 is a schematic diagram of an exploded structure of the eccentric device in the utility model;

Fig. 10 is the second schematic diagram of the decomposition structure of the eccentric device in the utility model;

Figure 11 is a schematic diagram of the installation of the eccentric disk in the utility model;

Fig. 12 is a schematic diagram of the three-dimensional structure of the eccentric disk in the utility model;

Explanation of reference numerals: left housing 1, right housing 2, housing bottom 3, transparent top cover 4, counterweight 5, movement 6, buffer pad 7, film 8, bottom plate 9, connecting shaft 9a, positioning hole 9b , upper bracket body 10, front frame 10a, rear frame 10b, first roller shaft 10c, second roller shaft 10d, third roller shaft 10e, lower bracket body 11, roller shaft driving motor 12, driving gear 13, driven gear 14. Light source generating device 15, light-transmitting plate 16, first mounting plate 17, second mounting plate 18, third mounting plate 19, fourth mounting plate 20, shading plate 21, strip-shaped protrusion 21a, eccentric device 22, Controller 23, battery 24, shaft core 25, shaft sleeve 26, limit edge 27, eccentric disc 28, shaft hole 28a, inner ring gear 28b, ring groove 28c, drive shaft 29, transmission gear 29a, lower positioning protrusion 29b, the first bevel tooth 30, the second bevel tooth 31, the mounting bolt 32, and the plane bearing 33.

Detailed ways

Below in conjunction with accompanying drawing and embodiment of description, specific embodiment of the present invention is described in further detail:

Referring to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the dynamic projection night light of the present invention includes a casing and a movement 6 inside the casing. The counterweight 5 at the bottom is used to lower the center of gravity of the entire projection night light. The bottom of the shell is a spherical structure, and the spherical bottom structure cooperates with the counterweight 5 so that the entire projection night light can stand naturally after being pushed down. rise and swing, showing the state of a tumbler; the movement 6 includes a frame, a controller 23, a storage battery 24, a light source transmission device and a film rolling device, the frame is fixedly connected with the shell, the controller 23, the storage battery 24, the light source transmission device and The film rolling devices are all installed on the frame, and the storage battery 24 supplies power for the controller 23, the light source transmission device and the film rolling device. The film rolling device includes a drive mechanism controlled by the controller 23 and a film 8 that is driven to circulate and roll by the drive mechanism. The film 8 is located between the light source transmission device and the transparent top cover 4, and the light source transmission device generates upward projection light, which is projected onto the imaging surface after being transmitted through the film 8 and the transparent top cover 4 in turn; at the bottom of the movement 6 An eccentric device 22 connected with the drive mechanism is also installed, and the eccentric device 22 constantly changes the position of the center of gravity of the shell under the driving action of the drive mechanism of the film rolling device, so that the center of gravity continuously deviates from the axis position of the projection night light, so as to realize the center of gravity of the shell. Swing autonomously.

Referring to Fig. 4, Fig. 5, Fig. 6, Fig. 7 and shown in Fig. 8, the frame includes a base plate 9, an upper support body 10 and a lower support body 11, the lower support body 11 is fixedly connected with the base plate 9 by bolts, and the upper support body The bottom of 10 is bolted to lower support body 11 by bolts, in order to ensure the stability of the center of gravity of the whole structure, lower support body 11 is installed in the middle position of base plate 9; Upper support body 10 includes front frame 10a and rear frame 10b, front frame 10a and rear frame 10b are all rectangular structures, are provided with first roller shaft 10c and the second roller shaft 10d that are used to connect front frame 10a and rear frame 10b on both sides of the upper end of upper support body 10, on the lower end of upper support body 10 The middle part is provided with a third roller shaft 10e, and the third roller shaft 10e, the first roller shaft 10c and the second roller shaft 10d form an inverted triangle film mounting bracket, and the film 8 is mounted on the film mounting bracket and kept in a tensioned state, Wherein the first roller shaft 10c and the second roller shaft 10d are driven shafts, the third roller shaft 10e is a driving shaft, and the driving mechanism of the film rolling device is connected to the third roller shaft 10e through transmission.

The driving device of the film rolling device includes a roller shaft driving motor 12, and the roller shaft driving motor 12 is installed on the lower support body 11 and is located directly below the third roller shaft 10e, so as to prevent the installation position of the roller shaft driving motor 12 from deviating from the entire projection night. The axis of the lamp causes the center of gravity to deviate. A driving gear 13 is installed on the output shaft of the roller shaft driving motor 12, and a driven gear 14 meshing with the driving gear 13 is installed on the end of the third roller shaft 10e. The roller shaft driving motor 12 Drive the third roller shaft 10e to rotate to drive the film 8 to roll on the film mounting bracket.

Wherein, the first roll shaft 10c, the second roll shaft 10d and the third roll shaft 10e all include a shaft core 25 and a shaft sleeve 26, and the two ends of the shaft core 25 of the first roll shaft 10c and the second roll shaft 10d are respectively connected to The front frame 10a and the rear frame 10b are fixedly connected, the bushings 26 of the first roller shaft 10c and the second roller shaft 10d are loosely fitted on the shaft core 25 and can rotate, and the bushing 26 of the third roller shaft 10e is tightly fitted on the shaft core No spin on 25.

Both ends of all the shaft sleeves 26 are provided with limiting edges 27, and the effect of the limiting edges 27 is to ensure that the film 8 does not shift while rolling.

The light source projecting device is installed in the inverted triangle area formed by the film 8 under the installed state in the upper bracket body 10. The light source projecting device includes a light source generating device 15 and a light-transmitting plate 16. The support body 10 is fixedly connected and located directly above the third roller shaft 10e, and the light-transmitting plate 16 is fixedly connected to the upper support body 10 through a light-transmitting plate mounting bracket and is located directly above the light source generating device 15 .

The light source mounting frame includes a first mounting plate 17 bolted to the front frame 10a and a second mounting plate 18 bolted to the rear frame 10b. Plate 18 bolted.

The light-transmitting plate mounting frame includes a third mounting plate 19, a fourth mounting plate 20 and a light-shielding plate 21, a light-shielding plate 21 is provided on the left and right sides of the light-transmitting plate 16, and a light-shielding plate 21 is provided on the inner side of the light-shielding plate 21. The third mounting plate 19 is fixedly connected to the front frame 10a by bolts, the fourth mounting plate 20 is fixedly connected to the rear frame 10b by bolts, and the front and rear sides of the light shielding plate 21 are respectively It is bolted to the third mounting plate 19 and the fourth mounting plate 20 through bolts.

The bottom-up light source generated by the light source generating device 15 passes through the light-transmitting plate 16 to form upward parallel light rays. The function of the light-transmitting plate 16 is to make the parallel light rays more uniform and avoid uneven brightness of the light projected on the film 8 Case. The function of the light-shielding plate 21 is to prevent the light generated by the light source generating device 15 from being projected outward in the light-transmitting plate 16 to other places inside the housing to cause reflection, and to prevent the reflected light from interfering with the above-mentioned parallel light.

Since the design purpose of the present invention is to project a constantly changing pattern on the ceiling, the variation of the pattern can be the change of the pattern content caused by the continuous rolling of the film 8, or the movement of the projected pattern on the ceiling.

Therefore, the entire projection night light should have a self-swing function under non-human control, causing the projected pattern to move on the ceiling. Therefore, in the present invention, an eccentric device 22 is installed on the bottom of the bottom plate 9 above the counterweight 5 .

Referring to Fig. 1, Fig. 4, Fig. 9, Fig. 10, Fig. 11 and Fig. 12, the eccentric device 22 includes an eccentric disc 28, a drive shaft 29 and a gear set, and a connecting shaft protrudes downward from the center of the bottom of the bottom plate 9. 9a, the eccentric disc 28 is provided with a shaft hole 28a matched with the connecting shaft 9a, the eccentric disc 28 can rotate around the connecting shaft 9a, the shaft hole 28a is eccentrically arranged on the eccentric disc 28, and the eccentric distance is smaller than the diameter of the base plate 9 and the eccentric disc 1/2 of the diameter difference of 28, the upper surface of the eccentric disc 28 is provided with a disc-shaped groove centered on the shaft hole 28a, the inner wall of the groove is provided with an inner gear 28b, and the drive shaft 29 is installed in the disc-shaped groove Inside, the transmission gear 29a meshing with the ring gear 28b is installed on the drive shaft 29, and the gear set includes the first bevel gear 30 installed on the output end of the roller drive motor 12 and the second bevel gear 31 installed on the drive shaft 29 , the base plate 9 is provided with a positioning hole 9b for the upper part of the drive shaft 29 to pass through. The function of the positioning hole 9b is to position the drive shaft 29. The second bevel gear 31 is installed on the upper end of the drive shaft 29 and connected with the first bevel gear. 30 engagement. In addition, an annular groove 28c is also provided in the disk-shaped groove, and the lower end of the drive shaft 29 is provided with a lower positioning protrusion 29b that fits with the annular groove 28c. During the rotation of the eccentric disc 28, the annular groove 28c is used as a track for the lower positioning protrusion 29b to move relative to the eccentric disk 28, and the effect of this track is to ensure that the ring gear 28b and the transmission gear 29a are always in meshed state.

In order to facilitate the installation of the eccentric disc 28, the eccentric device 22 is also provided with a mounting bolt 32 for installing the eccentric disc 28 on the bottom of the base plate 9, and the lower end of the connecting shaft 9a is provided with a threaded hole threaded with the mounting bolt 32, and A plane bearing 33 is installed on the bottom of the eccentric disc 28 through the mounting bolt 32, and the eccentric disc 28 presses the plane bearing 33 downward under the action of gravity, so that the eccentric disc 28 rotates more smoothly.

With reference to Fig. 2 and shown in Fig. 3, movement 6 is equipped with controller 23 and storage battery 24, and controller 23 and storage battery 24 are installed on the left and right sides of lower support body 11, to guarantee the center of gravity balance under static state, storage battery 24 sets There is a charging socket, and the housing is provided with a socket corresponding to the charging socket, and the controller 23 is provided with a speed regulating opening, and the speed regulating switch is mainly used to control the rotating speed of the roller shaft driving motor 12, so as to control the rolling speed of the film 8. Speed and frequency of voluntary oscillations.

In order to facilitate maintenance and speed control, the shell of the present invention is a disassembled and detachable shell, which includes a left shell 1 and a right shell 2, wherein the left shell 1 is provided with a shell bottom 3, and the bottom of the shell bottom 3 It is a spherical structure or a cylindrical structure, and the tops of the left housing 1 and the right housing 2 are provided with oblate notches, and two oblate notches constitute the projection window.

Referring to Figure 3, in order to prevent infants from putting other toys into the inner wall of the housing through the projection window when they are playing, a transparent top cover 4 is installed at the projection window, and the transparent top cover 4 is made of the same material as the light-transmitting plate 16 , with high light transmittance.

Referring to Fig. 2, there is a buffer pad 7 attached to the inside of the housing. The function of the buffer pad 7 is to prevent the internal movement 6 from receiving serious collisions when the projection night light is quickly pushed down artificially, and to effectively protect the internal structure.

The above description is only a preferred embodiment of the present invention, and does not make any limitation to the technical scope of the present invention, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are still valid. It belongs to the scope of the technical solution of the present invention.

Claims (8)

1. a kind of dynamic projection night-light, it is characterised in that：Including the movement (6) in shell and setting shell；

The top of shell is equipped with projection window, transparent cap (4) is equipped at the projection window, the bottom of shell is spherical surface, shell bottom Portion is additionally provided with clump weight (5), so that shell is arranged in tumbler；

Movement (6) includes rack, controller (23), accumulator (24), light source projection device and film tourelle, rack with Shell is fixedly connected, and controller (23), accumulator (24), light source projection device and film tourelle are installed in rack, Accumulator (24) device (23), light source projection device and the power supply of film tourelle in order to control, film tourelle includes by controlling The driving mechanism of device (23) control and the film (8) that circulating rolling is driven by the driving mechanism, the film (8) are located at light source throwing Between injection device and transparent cap (4), light source projection device generates upward throw light, and the throw light is successively through film (8) and after transparent cap (4) transmission it projects on imaging surface；

Further include the eccentric (22) being connect with the driving mechanism of film tourelle, which rolls in film Constantly change the position of centre of gravity of shell under the driving effect of the driving mechanism of device, so that shell is independently swung, the rack packet Bottom plate (9), upper bracket body (10) and lower bracket body (11) have been included, lower bracket body (11) is fixedly connected by bolt with bottom plate (9), The bottom of upper bracket body (10) is bolted by bolt and lower bracket body (11), and lower bracket body (11) is mounted on bottom plate (9) Center position；Upper bracket body (10) includes front baffle (10a) and afterframe (10b), front baffle (10a) and afterframe (10b) It is rectangular configuration, for connecting front baffle (10a) and afterframe (10b) is equipped in the upper end both sides of upper bracket body (10) One roll shaft (10c) and the second roll shaft (10d) are equipped with third roll shaft (10e), third roll shaft in the middle part of the lower end of upper bracket body (10) (10e), the first roll shaft (10c) and the second roll shaft (10d) constitute the film mounting bracket of a up-side down triangle, film (8) installation In film mounting bracket and keep tensioning state, the first roll shaft (10c) and the second roll shaft (10d) for driven shaft, third roll shaft (10e) is driving shaft, and driving mechanism and the third roll shaft (10e) of film tourelle are sequentially connected；

The shell includes left shell (1) and right shell body (2), and left shell (1) is equipped with shell bottom (3), and the bottom at the shell bottom (3) is Oblate v notch v is equipped at the top of spherical structure, left shell (1) and right shell body (2), described in two oblate v notch vs are constituted Projection window.

2. a kind of dynamic projection night-light according to claim 1, it is characterised in that：First roll shaft (10c), the second roll shaft (10d) and third roll shaft (10e) include shaft core (25) and axle sleeve (26), the first roll shaft (10c) and the second roll shaft (10d) The both ends of shaft core (25) are fixedly connected with front baffle (10a) and afterframe (10b) respectively, the first roll shaft (10c) and the second roll shaft For axle sleeve (26) clearance fit of (10d) in shaft core (25), the axle sleeve (26) of third roll shaft (10e) is a tight fit in shaft core (25) On, the both ends of axle sleeve (26) are equipped with position-limited edge (27).

3. a kind of dynamic projection night-light according to claim 1 or 2, it is characterised in that：The drive of the film tourelle Motivation structure includes roll shaft driving motor (12), which is mounted on lower bracket body (11) and is located at third roller The underface of axis (10e) is equipped with driving gear (13) on the output shaft of roll shaft driving motor (12), at third roll shaft (10e) End the driven gear (14) engaged with driving gear (13) is installed.

4. a kind of dynamic projection night-light according to claim 1, it is characterised in that：The light source projection device is mounted on upper Inside the film mounting bracket of stake body (10), light source projection device includes light source generator (15) and light-transmitting plate (16), light source generator (15) is fixedly connected with upper bracket body (10) by light source mounting bracket and is located at third roll shaft (10e) Surface, light-transmitting plate (16) is fixedly connected by light transmission board mounting stand with upper bracket body (10) and is located at light source generator (15) surface.

5. a kind of dynamic projection night-light according to claim 4, it is characterised in that：The light source mounting bracket includes with before Bolted first mounting plate (17) of frame (10a) and with bolted second mounting plate (18) of afterframe (10b), light source The rear and front end of generating means (15) is bolted with the first mounting plate (17) and the second mounting plate (18) respectively；Light-transmitting plate (16) Mounting bracket includes third mounting plate (19), the 4th mounting plate (20) and barn door (21), and the left and right sides of light-transmitting plate (16) is equal It is provided with one piece of barn door (21), the strip that the inside upper and lower ends of barn door (21) are equipped with for light-transmitting plate (16) to be clamped is convex Rise (21a), third mounting plate (19) is fixedly connected by bolt with front baffle (10a), the 4th mounting plate (20) by bolt and Afterframe (10b) is fixedly connected, and the front and rear sides of barn door (21) pass through bolt and third mounting plate (19) and the 4th peace respectively Loading board (20) is bolted.

6. a kind of dynamic projection night-light according to claim 1, it is characterised in that：The eccentric (22) includes inclined Cartridge (28), drive shaft (29) and gear set, the bottom centre position of bottom plate (9) is downwardly projecting connecting shaft (9a), eccentric disc (28) axis hole (28a) coordinated with the connecting shaft (9a) is offered on, eccentric disc (28) can be rotated around the connecting shaft (9a), axis Hole (28a) eccentric setting on eccentric disc (28), the collar plate shape that eccentric disc (28) upper surface is equipped with centered on axis hole (28a) are recessed Slot, the groove inner wall are equipped with ring gear (28b), and drive shaft (29) is installed in collar plate shape groove, and drive shaft is equipped on (29) The transmission gear (29a) engaged with ring gear (28b), gear set include mounted on the of roll shaft driving motor (12) output end One umbrella tooth (30) and the second umbrella tooth (31) in the drive shaft (29) are offered for drive shaft (29) top on bottom plate (9) The location hole (9b) passed through, the effect of the location hole (9b) are positioned to drive shaft (29), and the second umbrella tooth (31) is mounted on It is simultaneously engaged with the first umbrella tooth (30) drive shaft (29) upper end.

7. a kind of dynamic projection night-light according to claim 6, it is characterised in that：It is additionally provided with circle in the collar plate shape groove Annular groove, the lower end of drive shaft (29) are equipped with the lower positioning protrusion (29b) with the annular groove clearance fit.

8. a kind of dynamic projection night-light according to claim 6, it is characterised in that：The eccentric (22) is additionally provided with use In the installation bolt (32) that eccentric disc (28) is mounted on to bottom plate (9) bottom, it is equipped with and the peace in the lower end of connecting shaft (9a) The threaded hole of bolt (32) screw-thread fit is filled, and plane is equipped in the lower part of eccentric disc (28) by the installation bolt (32) Bearing (33).