CN214795536U - Projection device - Google Patents

Abstract

The utility model discloses a projection arrangement, projection arrangement includes: the fixing seat comprises a guide groove formed by downwards concave from the top surface of the fixing seat and a buckling part formed by extending from the side wall of the guide groove along the horizontal direction; the light source component is fixed on the fixed seat; the rotating seat is movably arranged on the fixed seat, and the light source component is upwards exposed out of the rotating seat; the projection component is buckled on the rotating seat and covers the upper part of the light source component; the upper cover is arranged above the projection component in a covering mode and comprises a locking part formed by extending along the horizontal direction, and the locking part rotates along the guide groove and is buckled with the buckling part to restrain the upper cover from being separated from the fixed seat.

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 existing projection device comprises a fixed seat, a rotary seat arranged on the fixed seat, a light source component, a projection cover fixed on the rotary seat, a projection sheet arranged on the inner side of the projection cover, a motor driving the rotary seat to rotate, and an upper cover arranged above the projection device, wherein the upper cover is roughly cylindrical, the upper cover comprises an annular bulge formed by extending from the inner surface of the upper cover towards the direction of the light source component, the fixed seat comprises an annular groove formed by concavely arranging the outer surface of the upper cover, and pressure is applied to the upper cover along the vertical direction to enable the annular bulge to be accommodated in the annular groove.

Since the protrusion and the annular groove are fastened to each other by applying pressure in the up-and-down direction by a user, but the user needs to replace the projection sheet frequently during the use of the projection apparatus, the upper cover needs to be opened frequently because the upper cover is generally cylindrical and is shaped to form a hard interference fit with the fixing, which causes the user to press and deform the upper cover with force when opening the upper cover, and in addition, the projection apparatus of this type is generally suitable for children, and this fastening structure causes great difficulty for children to open the upper cover.

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 lock catch portion along guide slot rotation and lock in the buckling parts, restrain the upper cover breaks away from the projection arrangement of fixing base.

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

a projection device, comprising: the fixing seat comprises a guide groove formed by downwards concave from the top surface of the fixing seat and a buckling part formed by extending from the side wall of the guide groove along the horizontal direction; the light source component is fixed on the fixed seat; the rotating seat is movably arranged on the fixed seat, and the light source component is upwards exposed out of the rotating seat; the projection component is buckled on the rotating seat and covers the upper part of the light source component; the upper cover is arranged above the projection component in a covering mode and comprises a locking part formed by extending along the horizontal direction, and the locking part rotates along the guide groove and is buckled with the buckling part to restrain the upper cover from being separated from the fixed seat.

Furthermore, the buckling part extends from the side wall of the guide groove to the direction far away from the light source assembly, an accommodating space is formed between the buckling part and the bottom wall of the guide groove, and the locking part is accommodated in the accommodating space.

Further, the fixing seat comprises a protrusion formed by extending from the side wall of the guide groove towards the direction far away from the light source assembly, the protrusion is accommodated in the accommodating space, and the locking part comprises a concave part matched with the protrusion.

Further, the protrusion is closer to the light source assembly in a horizontal direction with respect to the fastening part.

Further, the fixing seat comprises a blocking part connected with one end of the buckling part, and the blocking part blocks the upper cover from excessively rotating.

Further, the buckling part comprises a guide inclined plane formed at one end far away from the blocking part, and the guide inclined plane is formed by extending from the bottom surface of the guide inclined plane to the top surface of the fixed seat.

Further, the fixing seat comprises a matching groove formed by downwards concave from the top surface of the fixing seat, the matching groove penetrates through the fixing seat towards the direction far away from the light source assembly, the matching groove is communicated with the guide groove in the horizontal direction, and the upper cover is downwards abutted to the bottom wall of the matching groove.

Further, the fastening portion does not extend to the fitting groove.

Furthermore, the upper cover includes the track of establishing the formation from its bottom surface is upwards sunken, the hasp portion from forming the inside wall of track extends towards the direction of light source subassembly and forms and with form the clearance between the roof of track, the buckling parts accept in the clearance.

Further, the locking portions do not protrude downward beyond the bottom of the upper cover in the up-down direction, and the locking portions contact the bottom surface of the guide groove downward.

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

the fixing seat comprises a guide groove formed by downwards recessing the top surface of the fixing seat and a buckling part formed by extending the side wall of the guide groove along the horizontal direction, the upper cover comprises a locking part formed by extending towards the light source component, the locking part rotates along the guide groove and is buckled with the buckling part to inhibit the upper cover from being separated from the fixing seat, a user can open the upper cover for replacing a projection lens by only slightly rotating the upper cover when opening the upper cover, and the phenomenon that the upper cover is deformed by hard interference and forced extrusion of the upper cover to release the projection lens is avoided.

[ description of the drawings ]

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

FIG. 2 is an exploded perspective view of the fixing base, the light source assembly and the rotating base shown in FIG. 1;

FIG. 3 is a perspective view of the fixing base shown in FIG. 2;

FIG. 4 is a top view of FIG. 3;

FIG. 5 is a perspective view of the swivel base of FIG. 1 after being inverted;

FIG. 6 is a top view of the rotary base of FIG. 1 assembled;

FIG. 7 is a cross-sectional view taken along line A-A of FIG. 6;

FIG. 8 is a partial enlarged view of c in FIG. 7;

FIG. 9 is a perspective view of the projection mask and the rotary base of FIG. 1;

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

FIG. 11 is an enlarged view of a portion d of FIG. 10;

FIG. 12 is an enlarged view of a portion e of FIG. 10;

FIG. 13 is an exploded perspective view of the projection housing of FIG. 9;

FIG. 14 is a perspective view of the lid of FIG. 1 after rotation;

FIG. 15 is a bottom view of the cover, the rotary seat, the light source assembly, the projection apparatus, and the upper cover of FIG. 1;

FIG. 16 is a perspective view of the cover of FIG. 15 after rotation;

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 and 2, for the projection apparatus 100 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 movable mounting in a rotary base 2 of the fixing base 1, a projection member fixed to the rotary base 2, a driving motor 3 of the rotary base 2, a main board 8 and a power source 9 accommodated in the fixing base 1, and an upper cover 7 fastened to the fixing base 1, wherein the power source 9 and the motor 3 are electrically connected to the main board 8.

As shown in fig. 2 and fig. 3, the fixing base 1 includes a base 11 and a cover 12 fastened on the base 11, the base 11 and the cover 12 form a cavity 13, and the main board 8 and the power supply 9 are accommodated in the cavity 13. The cover 12 includes a recess 122 formed by recessing downward from the upper surface thereof, a through hole 121 and a through hole 123 vertically penetrating the cover 12, the through hole 121 and the through hole 123 vertically penetrate the bottom wall of the recess 122, the through hole 123 is located outside the through hole 121, the diameter of the through hole 121 is larger than that of the through hole 123, and the recess 122 is communicated with the cavity 13. The cover 12 further includes a plurality of holding portions 125 and a plurality of protruding portions 124 disposed around the through hole 121, the holding portions 125 and the protruding portions 124 are formed by extending upward from the bottom wall of the groove 122, the holding portions 125 and the protruding portions 124 are not higher than the top surface of the cover 12, the holding portions 125 are lower than the protruding portions 124, the holding portions 125 and the protruding portions 124 are alternately disposed around the axial direction of the through hole 121, the protruding portions 124 are closer to the center of the through hole 121 than the holding portions 125, and the through hole 123 is located outside the protruding portions 124. In an embodiment, a connecting line between the plurality of the fastening parts 125 forms a triangle, the connecting line between the plurality of fastening parts 125 forms a triangle, each fastening part 125 includes an arm 1251 connected to the cover 12, and a stopper 1252 extending from the arm 1251 in a direction away from the light source assembly 4, the cover 12 is provided with a relief groove 129 corresponding to the arm 1251, the relief groove 129 penetrates the cover 12 up and down, a gap is formed between the stopper 1252 and the first step 22, the stopper 1252 is located above the first step 22 to inhibit the rotation base 2 from disengaging from the groove 122, the cover 12 is provided with a fastening part 127 recessed from an outer surface of the cover 12 to the through hole 121 along a horizontal direction, the cover 12 has a substantially cylindrical shape, and the fastening parts 127 are distributed along an axial direction of the cover 12. The fastening portion 127 includes a protrusion 1271 formed to extend downward, and the fastening portion 127 is horizontally protruded relative to the protrusion 1271. The protrusion 1271 is formed by extending in the up-down direction and has a circular arc structure. The cover 12 further includes a guiding groove 126 formed by recessing downward from a top surface thereof, and a fastening portion 127 formed by extending from a sidewall of the guiding groove 126 along a horizontal direction, the fastening portion 127 is formed by extending from a sidewall of the guiding groove 126 toward a direction away from the light source assembly 4, a receiving space is formed between the fastening portion 127 and a bottom wall of the guiding groove 126, the cover 12 further includes a protrusion 1271 formed by extending from a sidewall of the guiding groove 126 toward a direction away from the light source assembly 4, the protrusion 1271 is received in the receiving space, the protrusion 1271 is closer to the light source assembly 4 than the fastening portion 127 in the horizontal direction, the cover 12 includes a blocking portion 128 connected to one end of the fastening portion 127, the blocking portion 128 blocks the upper cover 12 from over-rotating, the fastening portion 127 includes a guiding inclined surface formed at an end away from the blocking portion 128, the guide slope is formed extending from the bottom surface thereof toward the top surface of the cover 12. The upper cover 12 includes a fitting groove formed by being recessed downward from a top surface thereof, the fitting groove penetrates the upper cover 12 in a direction away from the light source assembly 4, the fitting groove and the guide groove 126 are communicated with each other in a horizontal direction, and the engaging portion 127 does not extend to the fitting groove.

As shown in fig. 3 and 4, the cover 12 further includes a limiting portion 130 extending upward from the bottom of the groove 122, the limiting portion 130 is disposed to surround the retaining portion 125 and the protruding portion 124 in the horizontal direction, the through hole 123 is located outside the limiting portion 130, the limiting portion 130 is disposed lower than the retaining portion 125, the limiting portion 130 includes a base portion 1301 and a convex hull 1302 extending from the base portion 1301, a side of the convex hull 1302 close to the light source assembly 4 is in an arc structure, a side of the convex hull 1302 away from the light source assembly 4 is in a concave structure matching the convex hull 1302, in this embodiment, the limiting portion 130 is in a circular ring structure, and a plurality of the convex hulls 1302 are spaced apart from each other along the circumferential direction of the limiting portion 1302, but other embodiments may also have other structures.

As shown in fig. 3, 4 and 6, the rotary base 2 is accommodated in the recess 122, the top surface of the rotary base 2 is not higher than the top surface of the fixed base 1, the rotary base 2 includes an opening 21 penetrating through the upper and lower surfaces thereof, and a first step 22, a second step 23 and a gear ring 26 surrounding the opening 21, and a gap is formed between the gear ring 26 and the bottom wall of the recess 122 in the vertical direction. The second step 23 is defined as a step portion, the opening 21 communicates with the through hole 121, the two are aligned up and down, the diameter of the opening 21 is larger than that of the through hole 121, and the first step 22 is lower than the second step 23. The retaining portion 125 and the protruding portion 124 both protrude upwards into the opening 21, the retaining portion 125 is fastened to the first step 22 to prevent the rotating base 2 from moving upwards, and the protruding portion 124 is disposed upwards beyond the second step 23 but lower than the top surface of the rotating base 2. The rotating base 2 further includes a plurality of slots 24 disposed around the opening 21, the slots 24 vertically penetrate the rotating base 2, each slot 24 includes a first slot 241 and a second slot 242 communicating with the first slot 241, a width of the first slot 241 in a horizontal direction is greater than a width of the second slot 242 in the horizontal direction, the fastening portion 243 is formed on a slot wall of the second slot 242, and a guide surface 244 is formed at an interconnection between a slot wall of the second slot 242 and a slot wall of the first slot 241. The swivel base 2 further includes a rotating shaft portion 25 provided around the opening 21, the rotating shaft portion 25 being located inside the ring gear 26, the first step 22 being formed extending from the rotating shaft portion 25 toward the retaining portion 125, the stopper portion 1252 including a guide portion guiding the mounting of the swivel base 2 to the recess 122, the restricting portion 130 being located between the ring gear 26 and the rotating shaft portion 25 in the horizontal direction, the boss 1302 being provided closer to the rotating shaft portion 25 than the restricting portion 130, the rotating shaft portion 25 including a shaft portion 251 and a plurality of protrusions 252 formed extending downward from the shaft portion, i.e., the protrusions 252 abut downward against the bottom wall of the recess 122, and a portion of the shaft portion 251 where the protrusions 252 are not provided and the bottom wall of the recess 122 form a gap in the up-down direction, the protrusions 252 being provided lower than the bottom of the ring gear 26 in the up-down direction, the shaft portion 251 has an annular structure, the plurality of protrusions 252 are spaced apart from each other along the circumferential direction of the shaft portion 251, the protrusions 252 have an arc structure, the bottom of the shaft portion 128 in the vertical direction is lower than the bottom of the ring gear 26 in the vertical direction, and a gap is formed between the ring gear 26 and the bottom wall of the groove 122.

As shown in fig. 2 and 3, the motor 3 includes a gear 31 protruding into the through hole 123, and the gear 31 cooperates with the ring gear 26 to drive the rotary base 2 to rotate.

As shown in fig. 3, 4 and 6, the light source assembly 4 is electrically connected to the main board 8, 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 124 and is accommodated in the opening 21, and the lamp panel 41 is located above the second step 23 and is not higher than the upper surface of the rotary base 2. The lamp panel 41 and the second step 23 form a gap in the up-down direction. In this embodiment, the lamp panel 41 is fixed to the protruding portion 124 by a screw, and the protruding portion 124 is a circular column, and an internal thread (not shown) matched with the screw is formed inside the circular column.

As shown in fig. 13, the projection unit includes a housing 5 and a projection sheet 6 disposed inside the housing 5.

As shown in fig. 2, 9 and 10, the cover 5 is disposed above the light source assembly 4, the cover 5 includes a first portion 5 and a second portion 52 disposed above the first portion, in this embodiment, the first portion 51 and the second portion 52 are a transparent rubber ring structure, and the first portion 51 is abutted to the rotary base 2 downward. The first portion 51 includes a main body portion 511 extending in the vertical direction, an opening 513 penetrating through the main body portion 511, and a supporting portion 512 extending in the horizontal direction from the main body portion 511, where 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 513 is a circular hole, and the supporting portion 512 extends from the matching portion 5111 toward the center of the opening 513 to form a circular ring around the opening 513, that is, the diameter of the opening 513 at the circular hole corresponding to the portion where the supporting portion 512 is disposed may be smaller than the diameter at other positions. The first portion 51 further includes at least one hook 514 connected to the main body 511, the hook 53 extends in a direction away from the first portion 51, and the hook 53 first protrudes into the slot 24 and then rotates along the central axis of the opening 21 to be fastened to the slot wall of the slot 24. That is, the hook 514 protrudes into the first groove 241 before being fastened to the fastening portion 243, the fastening hook 514 moves from the first groove 241 to the second groove 242 and is fastened to the groove wall forming the second groove, and the guiding surface 244 plays a guiding role when the fastening hook 514 moves from the first groove 241 to the second groove 242. The hook 514 moves from the second groove 242 to the first groove 241, and the cover body is separated from the rotating base. In this embodiment, there are a plurality of hooks 514, but in other embodiments, there may be at least two hooks 514 (see fig. 8). The second portion 52 includes a limiting portion 521, a press-connection portion 522 extending from the limiting portion 521 in a horizontal direction (i.e., the press-connection portion 522 is perpendicular to the limiting portion 521), and a through groove 523 vertically penetrating through the press-connection portion 522, wherein the limiting portion 521 is fastened to the matching portion 5111 and located outside the matching portion 5111, the press-connection portion 522 is located above the supporting portion 512, and the press-connection portion 522 and the supporting portion 512 are parallel to each other and vertically aligned. The opening 513 and the through groove 523 are communicated with each other and have the same diameter.

As shown in fig. 7, 9 and 10, 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 detachably disposed 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 512 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 512 and the rotating base 2 together limit the movement of the first film 61 in the up-down direction, in this embodiment, the first film 61 abuts against the supporting portion 512 upwards. The second film 62 is located below the press-connection part 522, the second film 62 includes an intermediate portion 621 and an edge portion 622 formed by extending from the intermediate portion 621 along a horizontal direction, a diameter of the intermediate portion 621 is equal to a diameter of the through groove 523, the intermediate portion 621 is exposed upward to the through groove 523 and exposed downward to the opening 513, so that light emitted by the lamp bead 42 directly penetrates through the intermediate portion 621 and the upper cover 7 to irradiate on a projection surface, a projected pattern is clearer, the support part 512 supports the edge portion 622 upward, and the press-connection part 522 presses the edge portion 622 downward, that is, the edge portion 622 is located between the support part 512 and the press-connection part 522, so as to prevent the second film 62 from moving up and down. In this embodiment, the second movie 62 is a circular film. The light emitted from the lamp bead 42 is irradiated on the first slide 61 and the second slide 62, and the patterns on the first slide 61 and the second slide 62 can be seen through the first portion 51.

As shown in fig. 3, 14 and 16, the upper cover 7 is disposed on the outer side of the cover body 5, the upper cover 7 is abutted downward against the bottom wall of the engagement groove, the upper cover 7 includes a rail 72 formed by being recessed upward from a bottom surface 71 thereof, and a locking portion 73 formed by extending from an inner side wall of the rail 72 toward the light source assembly and forming a gap with a top wall of the rail, and the locking portion 127 is accommodated in the gap. The locking portions 73 do not project downward beyond the bottom of the upper cover 7 in the up-down direction, and the locking portions 73 contact the bottom surface of the guide groove downward. The locking portion 73 includes a recessed portion 731, the recessed portion 731 is an arc-shaped groove structure, the buckling portion 127 protrudes into the track 72 and is located above the locking portion 73, the locking portion 73 is accommodated in the accommodating space, the locking portion 72 and the buckling portion 127 are fixed to each other, so as to prevent the upper cover 7 from being detached from the fixing base 1, and the recessed portion 731 is matched with the protrusion 1271 to restrain the upper cover 7 from rotating relative to the fixing base 1. The bottom surface 71 abuts downward against the bottom wall of the guide groove 126, and the locking portion 73 is located above the bottom surface 71. In this embodiment, the portion penetrating the top surface of the fixing base 1 upward is defined as the first position of the guiding slot 126, the locking portion 73 moves from the first position to the position below the engaging portion 167, at this time, the upper cover 7 is fixedly engaged with the fixing base 1, and when the locking portion moves from the position below the engaging portion 127 to the first position, the upper cover 7 is detached from the fixing base 1. The upper cover 7 is a translucent frosted cover, and when the upper cover 7 is powered on, the first projection sheet 61 and the second projection sheet 62 are projected on a ceiling or a wall through the upper cover 7.

As shown in fig. 1 and 2, the power supply 9 is electrically connected to the light source assembly 4, and a wire passes through the through hole 121 and is connected to the lamp panel. (not shown)

As shown in fig. 1 and 2, during assembly, the power supply 9 and the main board 8 are first mounted on the base 11, the motor 3 is then fixed to the cover 12 or the base 11, and the cover 12 is fixed to the base 11; then, the rotating base 2 is installed on the cover 12, the light source assembly 4 is fixed on the cover 12, the cover 5 is rotated relative to the fixing base 1 to fasten the locking portion 72 to the fastening portion 125 of the fixing base 1, and finally, the upper cover 7 is rotated to fasten to the fixing base 1.

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

(1) the fixing base 1 includes a guiding groove 126 formed by recessing downward from the top surface thereof and a buckling portion 127 formed by extending from the side wall of the guiding groove 126 along the horizontal direction, the upper cover 7 includes a locking portion 73 formed by extending along the horizontal direction, the locking portion 73 rotates along the guiding groove 126 and is buckled with the buckling portion 127 to restrain the upper cover 7 from being disengaged from the fixing base 1, a user can open the upper cover 7 for replacing the projection sheet 6 by only slightly rotating when opening the upper cover 7, and the problem that the upper cover 7 is deformed by hard interference and pressing force of the upper cover 7 with the fixing base 1 to be disengaged is avoided.

(2) The fixing base 1 includes a protrusion 1271 extending from the side wall of the guiding groove 126 toward a direction away from the light source assembly 4, the protrusion 1271 is accommodated in the accommodating space, and the locking portion 73 includes a concave portion matching with the protrusion.

(3) The protrusion 1271 is closer to the light source assembly 4 than the engaging portion 127 in the horizontal direction, so that the locking portion 73 can be securely engaged with the lower side of the engaging portion 127 while suppressing the automatic release of the upper cover 7 due to vibration.

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 guide groove formed by downwards concave from the top surface of the fixing seat and a buckling part formed by extending from the side wall of the guide groove along the horizontal direction;

the light source component is fixed on the fixed seat;

the rotating seat is movably arranged on the fixed seat, and the light source component is upwards exposed out of the rotating seat;

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

the upper cover is arranged above the projection component in a covering mode and comprises a locking part formed by extending towards the light source component, and the locking part rotates along the guide groove and is buckled with the buckling part to restrain the upper cover from being separated from the fixed seat.

2. A projection device as claimed in claim 1, characterized in that: the buckling part extends from the side wall of the guide groove to the direction far away from the light source assembly, an accommodating space is formed between the buckling part and the bottom wall of the guide groove, and the locking part is accommodated in the accommodating space.

3. A projection device as claimed in claim 2, wherein: the fixing seat comprises a protrusion formed by extending from the side wall of the guide groove towards the direction far away from the light source assembly, the protrusion is contained in the containing space, and the locking part comprises a concave part matched with the protrusion.

4. A projection device as claimed in claim 3, wherein: the protrusion is closer to the light source assembly than the buckling part in the horizontal direction.

5. A projection device as claimed in claim 3, wherein: the fixing seat comprises a blocking part connected with one end of the buckling part, and the blocking part blocks the upper cover from excessively rotating.

6. The projection device of claim 5, wherein: the buckling part comprises a guide inclined plane formed at one end far away from the blocking part, and the guide inclined plane is formed by extending from the bottom surface of the guide inclined plane to the top surface of the fixed seat.

7. A projection device as claimed in claim 3, wherein: the fixing seat comprises a matching groove formed by downwards concave from the top surface of the fixing seat, the matching groove penetrates through the fixing seat towards the direction far away from the light source assembly, the matching groove is communicated with the guide groove in the horizontal direction, and the upper cover is downwards abutted to the bottom wall of the matching groove.

8. A projection device as claimed in claim 7, wherein: the fastening portion does not extend to the mating groove.

9. A projection device as claimed in claim 1, characterized in that: the upper cover comprises a track formed by upwards concave setting of the bottom surface of the upper cover, the lock catch portion extends towards the direction of the light source assembly from the inner side wall of the track to form a gap with the top wall of the track, and the buckling portion is contained in the gap.

10. A projection device as claimed in claim 9, wherein: the locking part does not extend downwards beyond the bottom of the upper cover in the vertical direction, and the locking part contacts the bottom surface of the guide groove downwards.

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