CN214795551U - Projection device - Google Patents

Abstract

The utility model discloses a projection arrangement, projection arrangement includes: the fixing seat comprises a first groove formed by downwards concave from the top surface of the fixing seat and at least one convex protrusion part accommodated in the first groove; the rotating seat is movably arranged in the first groove and comprises an opening penetrating through the upper surface and the lower surface of the rotating seat, a first step arranged around the opening and a plurality of bulges formed by upward extending from the first step, the bulges are arranged around the opening, and the bulges protrude into the opening and are higher than the first step; the light source component is positioned above the first step and fixed on the protruding part, and the plurality of protrusions block the light source component from shifting downwards; and the motor drives the rotating seat to rotate, so that the friction force between the first step and the light source component is reduced.

Description

Projection device

[ technical field ] A method for producing a semiconductor device

The utility model relates to a projection arrangement technical field, in particular to developments projection arrangement.

Background

The projection device comprises a fixed seat, a rotary disc and a light source assembly which are arranged on the fixed seat, a projection component fixed on the rotary disc, a shell covering the outer side of the projection component, and a motor driving the rotary disc to rotate, wherein the fixed seat comprises a groove formed by downwards concave arrangement of the top surface of the fixed seat and a rotary shaft formed by upwards extending from the bottom wall of the groove, the rotary disc is contained in the groove, the rotary disc comprises a through hole penetrating through the upper surface and the lower surface of the rotary disc to form a rotary ring arranged around the through hole, the rotary shaft protrudes into the through hole, and the rotary ring is arranged around the rotary shaft and rotates around the rotary shaft.

When the gap between the rotating ring and the rotating shaft is too small, the contact area between the rotating ring and the rotating shaft is easily too large, so that the friction force between the rotating ring and the rotating shaft is increased, and the abrasion between the rotating shaft and the rotating ring is easily increased; if the clearance between the rotating ring and the rotating shaft is too large, the matching between the motor and the rotating disc is not accurate enough, so that the rotating action of the rotating disc is not consistent, and the projection effect is influenced.

Therefore, there is a need to design a new projection device to overcome the above problems.

[ Utility model ] content

To the problem that the background art faces, the utility model provides a pivot portion centers on the restriction portion is rotatory, and is a plurality of the convex closure encircles the restriction portion sets up, the convex closure with the restriction portion forms the projection arrangement in clearance on the horizontal direction.

In order to achieve the above object, the utility model adopts the following technical means:

a projection device, comprising: the fixing seat comprises a first groove formed by downwards recessing the top surface of the fixing seat and a limiting part arranged in the first groove; the light source component is fixed on the fixed seat; the rotating seat is accommodated in the first groove and comprises an opening penetrating through the upper surface and the lower surface of the rotating seat, a rotating shaft part arranged around the opening and a plurality of convex hulls formed by extending from the rotating shaft part to the opening, the limiting part protrudes into the opening, the rotating shaft part rotates around the limiting part, the convex hulls are arranged around the limiting part, a gap is formed between the convex hulls and the limiting part in the horizontal direction, and the light source assembly is upwards exposed out of the opening; the projection component is arranged on the rotating seat and covers the upper part of the light source component; a housing covering the projection member; and the motor drives the rotating seat to rotate.

Further, the convex hull is not lower than the limiting portion.

Further, the fixing seat comprises a plurality of protruding parts protruding into the opening, the limiting part is arranged around the plurality of protruding parts, and the light source component is fixed on the protruding parts.

Further, the rotating seat comprises a first step formed by extending from the rotating shaft part towards the direction far away from the light source assembly and a plurality of bulges formed by extending upwards from the first step, the plurality of steps are arranged around the opening, the protruding part is higher than the first step, and the plurality of bulges and the light source assembly form gaps in the up-down direction.

Furthermore, the protruding part and one of the protruding hulls are located on the same radius straight line of the rotating seat.

Further, the swivel mount includes a plurality of sand grips that form from pivot portion downwardly extending, and is a plurality of the sand grip downward butt the diapire of first recess, pivot portion with form the clearance in the upper and lower direction of the diapire of first recess.

Further, the convex hull is flush with the bottom surface of the rotating shaft part.

Furthermore, the rotating base comprises an accommodating groove formed by downwards concave from the top surface of the rotating base and a clamping part formed by extending from the groove wall of the accommodating groove along the horizontal direction, and the shell comprises a locking part which extends into the accommodating groove and is rotationally clamped on the clamping part.

Further, the shell rotates clockwise the lock catch part is buckled with the clamping part, the shell rotates anticlockwise, and the lock catch part and the clamping part are mutually disengaged.

Furthermore, the clamping part extends from the groove wall of the accommodating groove to the direction far away from the light source assembly, the locking part extends from the inner wall surface of the shell to the direction close to the light source assembly, and the locking part is positioned below the clamping part.

Compared with the prior art, the utility model discloses a projection arrangement has following beneficial effect:

through certainly pivot portion orientation a plurality of convex hulls that the opening extends and forms, the protruding income of restriction portion the opening, pivot portion centers on the restriction portion is rotatory, and is a plurality of the convex hull encircles the restriction portion sets up, the convex hull with the restriction portion forms the clearance in the horizontal direction, is guaranteeing when the roating seat normally operates through setting up a plurality of the convex hull reduces the pivot mend with area of contact between the restriction portion, thereby the realization reduces the pivot seat with frictional force between the fixing base suppresses wearing and tearing between the two, ensures projection arrangement's normal work, and increases working life.

[ description of the drawings ]

Fig. 1 is a perspective view of a projection apparatus according to a first embodiment of the present invention;

FIG. 2 is an exploded perspective view of the light source assembly, the rotary base, the fixing base, the motor, the main board, and the speaker of FIG. 1;

FIG. 3 is an exploded perspective view of the swivel base, the projection member and the housing of FIG. 1;

FIG. 4 is a perspective assembly view of FIG. 3;

FIG. 5 is a bottom view of FIG. 4;

FIG. 6 is a cross-sectional view taken along line A-A of FIG. 5;

FIG. 7 is a partial enlarged view of b in FIG. 6;

FIG. 8 is a partial enlarged view of c in FIG. 6;

FIG. 9 is a front view of FIG. 4;

FIG. 10 is a cross-sectional view taken along line D-D of FIG. 9;

FIG. 11 is a cross-sectional view taken along line F-F of FIG. 5;

FIG. 12 is an exploded perspective view of FIG. 3;

FIG. 13 is a perspective view of the swivel base of FIG. 3 after rotation;

FIG. 14 is a perspective view of the housing of FIG. 3 after rotation;

FIG. 15 is a top view of the swivel base and the cover of FIG. 3;

FIG. 16 is an enlarged view of a portion g of FIG. 15;

fig. 17 is a perspective view of a projection apparatus according to a second embodiment of the present invention.

Reference numerals for specific embodiments illustrate:

[ detailed description ] embodiments

For better understanding of the objects, structures, features, and functions of the present invention, reference should now be made to the drawings and detailed description of the invention.

As shown in fig. 1, fig. 2 and fig. 3, for the projection apparatus 100 of the first embodiment of the present invention, the projection apparatus 100 includes a fixing base 1, a light source assembly 4 fixed to the fixing base 1, a rotary base 2 movably mounted to the fixing base 1, a buckle coupled to a cover 5 of the rotary base 2, a housing 7, and a projection sheet arranged on the cover 5, a motor 3 driving the rotary base 2, a main board 10, a battery 11 and a speaker 12 accommodated in the fixing base 1, the battery 11, the speaker 12 and the motor 3 all electrically connected to the main board 10, in this embodiment, the cover 5 and the projection sheet form a projection component, the projection component is mounted on the rotary base 2 and is covered above the rotary base 4, and the housing 7 is covered outside the projection component.

As shown in fig. 2, 8 and 12, the fixing base 1 includes a base 11, a plurality of supporting legs 13 mounted on the base 11, and a cover 12 fastened above the base 11, wherein the supporting legs 13 are upward for supporting the base 11. The base 11 includes a cavity 111 formed by recessing from the top surface thereof, and the cover 12 covers the cavity 111. The main board 10, the battery 11 and the speaker 12 are all accommodated in the cavity 111. The cover 12 includes a through hole 121 penetrating through the upper and lower surfaces thereof, and a first recess 122 and a second recess 123 disposed around the through hole 121, wherein the through hole 121 communicates with the cavity 111 from top to bottom, the first recess 122 communicates with the through hole 121, the first recess 122 is formed by recessing the top surface of the cover 12, the second recess 123 is formed by recessing the bottom wall of the first recess 122 from bottom, and the second recess 123 is substantially located at the middle position of the first recess 122. The middle portion of the second groove 123 forms a boss 124, the boss 124 is lower than the top surface of the cover 12, a plurality of protrusions 125 and a restriction portion 126 surrounding the protrusions 125 are formed by extending upward from the boss 124, the plurality of protrusions 125 are disposed around the through hole 121, the protrusions 125 are disposed higher than the restriction portion 126, the protrusions 125 connect the inner edges of the restriction portion 126, and the connection line between the plurality of protrusions 125 is substantially in the shape of an equilateral triangle. The cover 12 includes a through hole 127 penetrating through the upper and lower surfaces thereof, and the through hole 127 is communicated with the first groove 122 and the second groove 123, that is, the through hole 127 penetrates through the bottom walls of the first groove 122 and the second groove 123 vertically.

As shown in fig. 3, 13 and 7, the rotary seat 2 includes an opening 21 penetrating through an upper surface and a lower surface thereof, a rotary shaft portion 22 disposed around the opening 21, a first step 23 formed by extending horizontally from the rotary shaft portion 22 away from the opening 21, a second step 24 formed by projecting upwardly from the first step 23, a ring gear 25 formed by extending downwardly from the second step 24, a third step 26 formed by extending downwardly from the second step 24, and a ring portion 29 formed by extending downwardly from the third step 26, and the rotary shaft portion 22, the ring gear 25, and the ring portion 29 are disposed away from the opening 21 in this order. In this embodiment, the rotating base 2 is a disc structure, the through hole 121 and the opening 21 are vertically communicated, the protruding portion 125 and the limiting portion 126 both protrude into the opening 21, the limiting portion 126 is lower than the first step 23, and the protruding portion 125 is higher than the first step 23. The rotation shaft 22 is located outside the limiting portion 126, the rotation base 2 includes convex hulls 22a formed by extending from the limiting portion 126 toward the opening 21 and convex strips 22b formed by extending from the rotation shaft 22 downward, one of the convex hulls 22a, the protrusions 23a and the protruding portion 125 is located on the same radial straight line of the rotation base 2, the convex hull 22a and the limiting portion 126 form a small gap 2434 in the horizontal direction, the rotation shaft 22 rotates around the limiting portion 126, the convex hull 22a limits the movement of the rotation shaft 22 in the horizontal direction, and at the same time, the friction force between the rotation shaft 22 and the limiting portion 126 is reduced (see fig. 15-16). The protruding strip 22b abuts against the boss 124 downward, and the rotating shaft portion 22 and the boss 124 form a gap in the vertical direction, in this embodiment, the protruding strip 22b has an arc structure. (see fig. 8) the rotary base 2 further includes a plurality of protrusions 23a formed to extend upward from the top surface of the first step 23, and the plurality of protrusions 23a are spaced around the opening 21. In an embodiment, the convex hull 22a and the protrusion 23a are both arc-shaped long strips, a connecting line between the protrusions 23a forms an equilateral triangle, and the protrusion 125 and the protrusion 23a are located on the same radial straight line of the first step 23. The second step 24 includes a plurality of engaging grooves 241 surrounding the opening 21, the engaging grooves 241 vertically penetrate through the rotating base 2, the engaging grooves 241 include a first groove 2411 and a second groove 2412 communicating with the first groove 2411, and a width of the first groove 2411 in a horizontal direction is greater than a width of the second groove 2412 in the horizontal direction. The second step 24 further includes a receiving groove 242 formed by recessing downward from the top surface thereof, and a retaining portion 243 formed by extending from the receiving groove 242 and from one of the sidewalls of the receiving groove 242 along the horizontal direction, in this embodiment, the retaining portion 243 is formed by extending horizontally from one of the sidewalls of the receiving groove 242 towards the direction far away from the light source assembly 4, the receiving groove 242 includes a yielding groove 2421 vertically penetrating through the bottom wall thereof, and each of the yielding grooves 2421 is disposed corresponding to the retaining portion 243 in the vertical direction. The holding portion 243 includes a vertical portion 2432 and a horizontal portion 2431 extending from the vertical portion 2432 in a moisture direction, the vertical portion 2432 is connected to the bottom wall of the accommodating groove 242, a gap 2434 is formed between the horizontal portion 2431 and the bottom wall of the accommodating groove 242, the receding groove 2421 is disposed corresponding to the horizontal portion 2431, the horizontal portion 2431 includes a concave portion 2433 recessed toward a direction close to the light source assembly 4 and a guide surface 2435 connected to the concave portion 2433, the concave portion 2433 is an arc-shaped groove structure, and the guide surface 2435 is disposed obliquely from the concave portion 2433 toward the light source assembly 4. The ring gear 25 protrudes into the second groove 123 but forms a gap 2434 with the bottom wall of the second groove 123, the rotating base 2 includes a plurality of positioning portions 27 extending upward from the top surface of the third step 26 and a rib 28 connecting the positioning portions 27 and the second step 24, in this embodiment, the position where the rib 28 connects the second step 24 is a side wall of the receiving groove 242 away from the light source assembly 4. The reinforcing rib 28 and the positioning portion 27 are not higher than the second step 24. A plurality of the positioning portions 27 are provided around the second step 24 and spaced apart from each other. A gap 2434 is formed between the ring portion 29 and the side and bottom walls of the first groove 122.

As shown in fig. 2 and 5, the motor 3 includes a gear 31 protruding into the through hole 127, and the gear 31 cooperates with the ring gear 25 to drive the rotary base 2 to rotate.

As shown in fig. 2, 6 and 8, the light source assembly 4 is electrically connected to the main board 109, the light source assembly 4 includes a lamp panel 41 and a plurality of lamp beads 42 fixed to the lamp panel 41, the lamp panel 41 is fixed to the protruding portion 125 and is accommodated in the opening 21, the lamp panel 41 is located above the first step 23 and does not exceed the upper surface of the rotating base 2, a plurality of the protrusions 23a and the lamp panel 41 form a gap 2434 in the up-down direction, and the plurality of the protrusions 23a block the lamp panel 41 from moving downward in a transition manner. In this embodiment, the lamp panel 41 is fixed to the protrusion 125 by screws.

As shown in fig. 3, 12 and 11, the cover 5 is disposed above the light source assembly 4, the cover 5 includes a first portion 51 and a second portion 52 disposed above the first portion 51, in this embodiment, the first portion 51 and the second portion 52 are in a transparent rubber ring structure, and the first portion 51 abuts against the rotating base 2 downward. The first portion 51 includes a main body portion 511 extending in the vertical direction, an opening 512 penetrating through the main body portion 511, and a supporting portion 513 extending from the main body portion 511 in the horizontal direction, the main body portion 511 includes a matching portion 5111 engaged with the second portion 52, in this embodiment, the main body portion 511 is a hollow cylinder, the opening 512 is a circular hole, and the supporting portion 513 extends from the matching portion 5111 toward the center of the opening 512 to form a circular ring surrounding the opening 512, that is, the diameter of the circular hole of the corresponding portion with the supporting portion 513 of the opening 512 is smaller than the diameter of the circular hole at other positions. The first portion 51 further includes at least one hook 514 connected to the main body 511, the hook 514 extends in a direction away from the first portion 51, and the hook 514 first protrudes into the slot 241 and then rotates along the central axis of the opening 21 to be fastened to the slot wall of the slot 241. The hook 5142 protrudes into the first groove 2411 before being fastened to the fastening portion 243, the hook 514 moves from the first groove 2411 to the second groove 2412, the hook 5142 is fastened to the groove wall of the second groove 2412, the hook 514 moves from the second groove 2412 to the first groove 2411 to separate the cover 5 from the rotating base 22, in other words, when the cover 5 rotates clockwise, the hook 5142 is fastened to the rotating base 2, and when the cover 5 rotates counterclockwise, the hook 5142 and the rotating base 2 are mutually disengaged. The second portion 52 includes a press-connection portion 521, a through slot 522 vertically penetrating the press-connection portion 521, and a limiting portion 523 formed by extending downward from the press-connection portion 521, wherein the limiting portion 523 is fastened to the matching portion 5111 and located outside the matching portion 5111, the press-connection portion 521 is located above the supporting portion 513, and the press-connection portion 521 and the supporting portion 513 are parallel to each other and vertically aligned. The opening 512 and the through slot 522 are communicated with each other and have the same diameter.

As shown in fig. 3 and 12, the slide 6 includes a first film 61 disposed in the first portion 51 and a second film 62 disposed in the second portion 52, i.e., the slide 6 is separable from the housing 5. The light source assembly 4 is located in a space enclosed by the first film 61 and the second film 62. The first film 61 includes an unfolded state and a closed state, the unfolded state of the first film 61 is a film with a flat structure, so as to print patterns on a transparent film, the closed state of the first film 61 forms a cylindrical shape and is accommodated on the inner surface of the first portion 51, in other words, the shape of the closed state of the first film 61 matches with the shape of the second portion 52 to completely shield the inner surface of the first portion 51, and the connecting ends of the first film 61 are partially overlapped to prevent the first portion 51 from having a part uncovered by the first film 61. The supporting portion 513 is located above the first film 61, the bottom of the first film 61 is flush with the bottom of the first portion 51, the supporting portion 513 and the rotary seat 22 together limit the movement of the first film 61 in the up-down direction, and in this embodiment, the first film 61 is abutted to the supporting portion 513 upward. The second film 62 is located below the press-connection part 521, the second film 62 includes an intermediate part 621 and an edge part 622 formed by extending from the intermediate part 621 along a horizontal direction, a diameter of the intermediate part 621 is equal to a diameter of the through groove 522, the intermediate part 621 is exposed to the through groove 522 upwards and exposed to the opening 512 downwards, so that light emitted by the lamp bead 42 directly penetrates through the intermediate part 621 and the housing 7 to irradiate on a projection surface, the projected pattern is clearer, the support part 513 supports the edge part 622 upwards, and the press-connection part 521 presses the edge part 622 downwards, that is, the edge part 622 is located between the support part 513 and the press-connection part 521, so as to prevent the second film 62 from moving upwards and downwards. In this embodiment, the second movie 62 is a circular film.

As shown in fig. 7, 10 and 14, the housing 7 is disposed on the outer side of the cover 5, the housing 7 includes a base 71, an extension portion extending downward from the base 71, and a receiving cavity 73 recessed upward from a bottom surface of the extension portion, the receiving cavity 73 extends upward to the base 71, the extension portion protrudes horizontally from the base 71, a step surface 711 is formed on the bottom surface of the base 71, and the step surface 711 is located at a connection position of the base 71 and the extension portion. The housing 7 further includes a locking portion 74 extending from an inner surface of the extension portion toward the light source assembly 4, the locking portion 74 includes a vertical section 741, a horizontal section 742 extending horizontally from the vertical section 741, and a protrusion 743 connecting the horizontal section 742, the vertical section 741 is connected to the step surface 711, a receiving space 744 is formed between the horizontal section 742 and the step surface 711, the protrusion 743 is received in the gap 2434 and connected to the step surface 711, the horizontal section 742 is received in the gap 2434, the horizontal section 2431 is received in the receiving space 744, the vertical portion 2432 blocks the horizontal section 742 from over-rotating, the protrusion 743 and the recess 2433 cooperate with each other to prevent the housing 7 from automatically axially rotating, the vertical section 741 blocks the horizontal portion 2431 from over-rotating, that is, the housing 7 rotates clockwise, the horizontal section 742 is fastened to the horizontal portion 2431, the housing 7 rotates in a counterclockwise direction, the horizontal section 742 and the horizontal portion 2431 are disengaged from each other, in other words, when the rotating seat rotates clockwise, the horizontal section 742 and the horizontal portion 2431 are disengaged from each other, and when the rotating seat 2 rotates counterclockwise, the horizontal section 742 is fastened to the horizontal portion 2431. In this embodiment, the housing 7 is a translucent frosted cover, and when the power is turned on, the first and second slides 61 and 62 are projected on the ceiling or wall through the housing 7.

As shown in fig. 1, the projection apparatus 100 further includes a top cover 8 covering the housing 7, the top cover 8 can be fixed on the housing 7 or detachably connected to the housing 7, the top cover 8 is substantially formed as an umbrella structure, and a holding portion 81 is formed at the bottom thereof, the holding portion 81 is disposed around the housing 7, and a plurality of the small animals 9 are mounted on the holding portion 81 and spaced apart from each other.

As shown in fig. 1 and 13, the projection apparatus 100 further includes a plurality of small animals 9 inserted into the positioning portions 27 in a one-to-one correspondence manner. The small animal 9 can be movably inserted into the positioning part 27 or fixedly mounted on the positioning part 27. The small animal 9 comprises a foot patch part and a body 92 connected with the foot part 91, the foot part 91 is inserted downwards into the protruding concave hole and is arranged higher than the second step 24, the height of the body 92 is approximately one third of the height of the shell 7, the foot part 91 can be movably arranged relative to the positioning part 27, and can also be fixedly arranged, for example, the foot part 91 is adhered on the positioning part 27 by glue. In other embodiments, the small animal 9 can be fixed to the holding portion 81, so that the small animal 9 is inverted.

As shown in fig. 1, 2 and 3, when assembling, the battery 11, the main board 10 and the speaker 12 are first mounted on the base 11, the motor 3 is then fixed to the base 11, and the cover 12 is fixed to the base 11; then, the rotating base 2 is mounted on the cover 12, the light source assembly 4 is fixed on the cover 12, the cover 5 is rotatably fastened to the fixing base 1 with respect to the fixing base 1, the housing 7 is rotatably fastened to the rotating base 2, and the top cover 8 is mounted on the housing 7 recently.

Fig. 17 shows a projection apparatus 100 according to a second embodiment of the present invention, which is substantially the same as the first embodiment, and the difference is: the small animals 9 are mounted on the top cover 8 and arranged around the housing 7, the small animals 9 include the body 92 and the feet 91 extending upward from the body 92, the feet are mounted on the holding portion 81, and the body 92 is located above the rotary base 2. In other embodiments, a plurality of the small animals 9 may be hung upside down on the top cover 8.

To sum up, the utility model discloses a projection device has following beneficial effect:

compared with the prior art, the utility model discloses a projection arrangement has following beneficial effect:

(1) through certainly pivot portion orientation a plurality of convex hulls that the opening extends and forms, the protruding income of restriction portion the opening, pivot portion centers on the restriction portion is rotatory, and is a plurality of the convex hull encircles the restriction portion sets up, the convex hull with the restriction portion forms the clearance in the horizontal direction, is guaranteeing when the roating seat normally operates through setting up a plurality of the convex hull reduces the pivot mend with area of contact between the restriction portion, thereby the realization reduces the pivot seat with frictional force between the fixing base suppresses wearing and tearing between the two, ensures projection arrangement's normal work, and increases working life.

(2) The holding portion 243 is formed by extending from a wall of the receiving groove 242 in a direction away from the light source assembly 4, the locking portion 74 is formed by extending from an inner wall surface of the housing 7 in a direction close to the light source assembly 4, and the locking portion 74 is located below the holding portion 243.

(3) The roating seat 2 is including being located the ring gear 25 in the pivot portion 22 outside and certainly a plurality of sand grips 22a that pivot portion 22 downwardly extending formed, it is a plurality of sand grip 22a encircles opening 21 sets up and downward butt the diapire of first recess 122, ring gear 25 with form the clearance between the diapire of first recess 122, reduce pivot portion 22 with frictional force between the fixing base 1 reduces roating seat 2 with wearing and tearing between the fixing base 1.

The above detailed description is only for the purpose of illustrating the preferred embodiments of the present invention, and not for the purpose of limiting the scope of the present invention, therefore, all the equivalent technical changes using the description and drawings of the present invention are included in the scope of the present invention.

Claims (10)

1. A projection device, comprising:

the fixing seat comprises a first groove formed by downwards recessing the top surface of the fixing seat and a limiting part arranged in the first groove;

the light source component is fixed on the fixed seat;

the rotating seat is accommodated in the first groove and comprises an opening penetrating through the upper surface and the lower surface of the rotating seat, a rotating shaft part arranged around the opening and a plurality of convex hulls formed by extending from the rotating shaft part to the opening, the limiting part protrudes into the opening, the rotating shaft part rotates around the limiting part, the convex hulls are arranged around the limiting part, a gap is formed between the convex hulls and the limiting part in the horizontal direction, and the light source assembly is upwards exposed out of the opening;

the projection component is arranged on the rotating seat and covers the upper part of the light source component;

a housing covering the projection member; and the motor drives the rotating seat to rotate.

2. A projection device as claimed in claim 1, characterized in that: the convex hull is not lower than the limiting part.

3. A projection device as claimed in claim 1, characterized in that: the fixing seat comprises a plurality of protruding parts protruding into the opening, the limiting part is arranged around the protruding parts, and the light source component is fixed on the protruding parts.

4. A projection device as claimed in claim 3, wherein: the rotating seat comprises a first step formed by extending from the rotating shaft part towards the direction far away from the light source assembly and a plurality of bulges formed by extending upwards from the first step, the plurality of steps surround the opening, the protruding part is higher than the first step, and the bulges and the light source assembly form gaps in the up-down direction.

5. The projection device of claim 4, wherein: the protruding part, the protrusion and one of the protruding hulls are positioned on the same radius straight line of the rotating seat.

6. A projection device as claimed in claim 1, characterized in that: the swivel mount includes certainly a plurality of sand grips of pivot portion downwardly extending formation, and is a plurality of the sand grip downward butt the diapire of first recess, pivot portion with form the clearance in the upper and lower direction of the diapire of first recess.

7. A projection device as claimed in claim 6, wherein: the convex hull is flush with the bottom surface of the rotating shaft part.

8. A projection device as claimed in claim 1, characterized in that: the rotary seat comprises an accommodating groove formed by downwards concave arrangement from the top surface of the rotary seat and a clamping part formed by extending the groove wall of the accommodating groove along the horizontal direction, and the shell comprises a lock catch part extending into the accommodating groove and rotationally clamped on the clamping part.

9. A projection device as claimed in claim 8, wherein: the shell rotates clockwise the lock catch part to be buckled with the clamping part, the shell rotates anticlockwise, and the lock catch part and the clamping part are mutually disengaged.

10. A projection device as claimed in claim 9, wherein: the clamping part extends from the groove wall of the containing groove towards the direction far away from the light source assembly, the locking part extends from the inner wall surface of the shell towards the direction close to the light source assembly, and the locking part is positioned below the clamping part.

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