CN220730609U - Projection apparatus - Google Patents

Abstract

The utility model discloses projection equipment, which comprises a shell and a fan assembly, wherein the fan assembly comprises a cooling fan and a damping sleeve, and the cooling fan is sleeved in the damping sleeve and is fixed in the shell through the damping sleeve; the two opposite inner side walls of the shell extend towards the air inlet side of the cooling fan. The projection equipment provided by the utility model can effectively improve the heat dissipation efficiency while taking vibration reduction into consideration.

Description

Projection apparatus

Technical Field

The present disclosure relates to projection devices, and particularly to a projection device.

Background

The heat dissipation fan is one of the necessary components in the projector, and heat generated by core components such as an optical engine light source, a light valve, a lens focusing motor, a main control circuit board and the like of the projector needs to be timely conducted out, otherwise, the core components in the projector can work abnormally due to overhigh temperature, and the service life is influenced.

In the existing projector, the general cooling fan is arranged in the projector through the silica gel pad matched with the fastener, so that the vibration generated by the cooling fan is reduced to be transmitted to the shell, but the damping effect of the fixing mode is insufficient for the cooling fan with larger size; and the air duct design of the cooling fan of the general projector is poor, and efficient heat dissipation is difficult to realize.

The foregoing background is only for the purpose of facilitating an understanding of the principles and concepts of the utility model and is not necessarily in the prior art to the present application and is not intended to be used as an admission that such background is not entitled to antedate such novelty and creativity by the present application without undue evidence prior to the present application.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a projection device, which can improve the heat dissipation efficiency while considering the vibration reduction of a heat dissipation fan.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the utility model discloses projection equipment, which comprises a shell and a fan assembly, wherein the fan assembly comprises a cooling fan and a damping sleeve, and the cooling fan is sleeved in the damping sleeve and is fixed in the shell through the damping sleeve; the two opposite inner side walls of the shell extend towards the air inlet side of the cooling fan.

Preferably, at least one side wall of the damping sleeve abuts against the inner side wall of the shell or a gap smaller than or equal to 5mm exists.

Preferably, the projection device further comprises a cover bracket, wherein the cover bracket covers the top of the damping sleeve and is fixedly connected with the shell so as to fix the fan assembly in the shell.

Preferably, the cover support is provided with side openings at two opposite sides in the length direction, so that at least one side wall of the damping sleeve extends out of the side openings to prop against the inner side wall of the shell.

Preferably, the damping sleeve is provided with a first wire guide hole, the cover support is provided with a second wire guide hole, and the wires of the cooling fan pass through the first wire guide hole and the second wire guide hole which are corresponding in position.

Preferably, the cover support is provided with a plurality of connecting parts, the connecting parts are used for fixedly connecting the main board and/or a radiator of the main board, and the main board extends towards the direction of the air inlet side of the cooling fan.

Preferably, the fan assembly comprises at least two heat dissipation fans and at least two damping sleeves, the heat dissipation fans are in one-to-one correspondence with the damping sleeves, the heat dissipation fans are sleeved in the corresponding damping sleeves, and the at least two damping sleeves are arranged side by side.

Preferably, the side walls of two adjacent damping sleeves are propped against each other; or, a slot is arranged on the inner wall of the shell, at least one guide plate is arranged in the slot to divide the slot into at least two sub-slots, each sub-slot is used for accommodating one cooling fan, and the side wall of the damping sleeve corresponding to each cooling fan is propped against the guide plate.

Preferably, the side walls at two sides of the slot are the inner side walls at two opposite sides of the shell, and the side walls at two sides of the slot are respectively propped against the side wall of one damping sleeve.

Preferably, the projection device further comprises a heat dissipation assembly, the housing is provided with an air outlet, the heat dissipation assembly is arranged in the housing and located between the air outlet side of the heat dissipation fan and the air outlet of the housing, and the heat dissipation assembly is used for receiving heat of the heating component in the projection device.

Preferably, the projection device further comprises a cover support, the fan assembly comprises two cooling fans and two damping sleeves, the cooling fans are in one-to-one correspondence with the damping sleeves, and the damping sleeves wrap the corresponding cooling fans along the circumferential direction of the cooling fans; the inner bottom wall of the shell is provided with a slot, and the opposite side walls of the slot are respectively inner side walls of the opposite sides of the shell; a guide plate is arranged in the middle of the slot to divide the slot into two sub-slots, and each sub-slot is used for accommodating one cooling fan; two heat dissipation fans are arranged side by side, one side wall of the damping sleeve corresponding to each heat dissipation fan abuts against the inner side wall of the shell, and the other opposite side wall abuts against the guide plate; the cover support covers the tops of the two shock absorbing sleeves and is detachably connected with the inner wall of the shell and/or the groove wall of the slot.

Compared with the prior art, the utility model has the beneficial effects that: according to the projection equipment disclosed by the utility model, the radiating fan is sleeved in the damping sleeve, so that the vibration transmission of the radiating fan can be effectively reduced; meanwhile, two opposite inner side walls of the shell extend towards the air inlet side of the cooling fan, which is also beneficial to closing an air inlet channel of the cooling fan and improving the cooling efficiency.

In a further scheme, the utility model has the following beneficial effects:

(1) At least one side wall of the damping sleeve is propped against or has a gap smaller than or equal to 5mm with the inner side wall of the shell, so that the cooling fan is propped against the inner side wall of the shell of the projection equipment through the damping sleeve or has a very small gap with the inner side wall of the shell of the projection equipment, and the occupied space of the cooling fan in the projector is reduced while vibration reduction is considered, thereby being beneficial to improving the space utilization rate in the projector.

(2) The side opening is opened to the side of cover support for the lateral wall of damper sleeve can stretch out from the side opening and offset with the inside wall of casing, and can not close the lateral wall of support through the cover, thereby can further reduce the size of projecting apparatus.

(3) The wire guide holes corresponding to the positions are arranged on the damping sleeve and the cover support, so that wires of the cooling fan can conveniently pass through the wire guide holes, on one hand, the disorder of the wires is avoided, and on the other hand, the space is further saved.

(4) At least two cooling fans and corresponding damping sleeves can be arranged in the projection equipment, wherein each damping sleeve is arranged side by side, and adjacent damping sleeves can be directly or indirectly abutted (with a guide plate in between), so that gaps are blocked in the transverse direction of the cooling fans, and the phenomenon that the core component of the projector is affected due to the fact that hot air on the air outlet side of the cooling fans flows back to the air inlet side through the gaps is avoided.

(5) The inner side walls of the opposite sides of the shell are used as the side walls of the two sides of the slot to respectively prop against the side wall of one damping sleeve, and further, the core component of the projector is prevented from being influenced due to the fact that hot air on the air outlet side of the cooling fan flows back to the air inlet side.

(6) And a heat radiation assembly is arranged between the air outlet side of the heat radiation fan and the air outlet hole of the shell, so that the heat radiation effect is further enhanced.

Drawings

FIG. 1 is a schematic view of a projection device according to a preferred embodiment of the present utility model;

FIG. 2 is an exploded schematic view of the projection device of FIG. 1;

FIG. 3 is an exploded schematic view of a part of the structure of the projection apparatus in FIG. 1;

FIG. 4 is an exploded schematic view of a fan assembly of the projection device of FIG. 1;

FIG. 5 is a schematic view of a cover bracket of the projection device of FIG. 1;

FIG. 6 is a schematic view of the internal structure of the housing of the projection device of FIG. 1;

FIG. 7 is a schematic illustration of a stationary fan assembly within a housing of the projection device of FIG. 1;

FIG. 8 is a schematic view of a heat dissipating assembly disposed within a housing of the projection device of FIG. 1;

Detailed Description

The following describes embodiments of the present utility model in detail. It should be emphasized that the following description is merely exemplary in nature and is in no way intended to limit the scope of the utility model or its applications.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. In addition, the connection may be for both the fixing action and the circuit/signal communication action.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing embodiments of the utility model and to simplify the description by referring to the figures, rather than to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more, unless explicitly defined otherwise.

As shown in fig. 1 and 2, a projection device according to a preferred embodiment of the present utility model includes a housing 10, a fan assembly 20, a cover bracket 30, a heat dissipation assembly 40, a light engine (not shown), a projection lens (not shown), a main board (not shown), and the like. The optical engine is arranged on the air inlet side of the fan assembly 20, and the heat dissipation assembly 40 is arranged on the air outlet side of the fan assembly 20.

Referring to fig. 3 and 4, the fan assembly 20 includes two heat dissipation fans 21 and two damper sleeves 22, the heat dissipation fans 21 are in one-to-one correspondence with the damper sleeves 22, the heat dissipation fans 21 are sleeved in the damper sleeves 22, and the heat dissipation fans 21 are fixed in the housing 10 through the damper sleeves 22. Specifically, the damper sleeve 22 wraps the corresponding radiator fan 21 along the circumferential direction of the radiator fan 21; the front and back sides of the damping sleeves 22 are respectively provided with a ventilation opening 221 so that the cooling fan 21 can intake air and/or exhaust air from the ventilation openings 221, and the outer side walls 222 of the two damping sleeves 22 are propped against the inner side wall 13 of the shell 10. In this embodiment, the damping sleeve 22 is a silica gel sleeve.

The two opposite inner side walls 13 of the housing 10 extend toward the air intake side of the cooling fan 21, and the air intake side of the cooling fan 21 is the side where the air intake is located, that is, the inner side walls 13 of the housing 10 extend toward the air intake of the cooling fan 21 or near the end face of the side where the air intake is located. In one embodiment, the inner sidewall 13 of the housing 10 is at least partially located in front of the air intake side of the cooling fan 21, and the left side and the right side of the fan assembly 20 are abutted against the inner sidewall 13 of the housing 10 by the damping sleeve 22 or have a gap less than or equal to 5mm, so that the inner sidewall 13 of the housing 10 can be considered to extend toward the air intake side of the cooling fan 21. When the fan assembly 20 only includes a group of the cooling fan 21 and the damper sleeve 22, the inner sidewall 13 on one side of the housing 10 abuts against the left side of the damper sleeve 22 or has the gap, and the inner sidewall 13 on the other side abuts against the right side of the damper sleeve 22 or has the gap; when the fan assembly 20 includes two or more sets of cooling fans 21 and damping sleeves 22, the cooling fans 21 and the damping sleeves 22 are in one-to-one correspondence and are disposed in the corresponding damping sleeves 22, the damping sleeves 22 of each set are disposed side by side, one side inner sidewall 13 of the housing 10 abuts against the leftmost damping sleeve 22 or has the gap, and the other opposite side inner sidewall 13 abuts against the rightmost damping sleeve 22 or has the gap. Further, the inner sidewall 13 of the housing 10 may also form a protruding air guiding structure, and the air guiding structure is located in front of the cooling fan 21 and faces the end face where the air inlet of the cooling fan 21 is located to narrow the air inlet channel, which also belongs to the scheme that the inner sidewall 13 of the housing 10 extends towards the air inlet side of the cooling fan 21. The fan assembly 20 substantially cuts off the air inlet duct and the air outlet duct in the housing 10, so that the air inlet duct is directed to the air inlet of the cooling fan 21 as much as possible, and hot air at the air outlet side is difficult to flow back, thereby improving the cooling efficiency.

Referring to fig. 1, in some embodiments, the heat dissipation fan 21 is an axial fan, and the height of the heat dissipation fan 21 is greater than or equal to 2/3 of the overall height of the projector, and this structural design not only can bring the heat dissipation fan 21 with a large size to provide strong heat dissipation wind power for the projector; and the large-sized cooling fan 21 isolates the air inlet duct and the air outlet duct as much as possible in the width direction of the projector, so that the air flow of the air inlet duct passes through the air inlet of the cooling fan 21 as much as possible. In addition, the silica gel sleeve 22 also enables the large-size cooling fan 21 in part of the schemes to offset the inner side wall 13 of the shell 10 through the silica gel sleeve 22 in a large area, so that the occupied space of the fan assembly 20 can be effectively reduced, the space utilization rate in the projector is improved, and the whole size of the projector is reduced; meanwhile, the silica gel sleeve 22 can reduce vibration generated when the large-size cooling fan operates and is transmitted to the shell.

In some embodiments, at least one of the inner sidewall 13, the bottom wall or the top wall of the housing 10 is provided with an air inlet hole on a side facing the air inlet of the cooling fan 21. For example, an air inlet hole is formed in the front of the cooling fan 21 in the inner side wall 13 of the side, which abuts against the damping sleeve 22, of the housing 10, and the air inlet hole is communicated with the air inlet duct.

The projector is also provided with components such as a light machine and a speaker, and in some embodiments, the light machine and the speaker are both arranged at a position facing the air inlet of the cooling fan 21, that is, in the air inlet channel, and the air flow entering from the air inlet hole can enter the cooling fan 21 through the channel formed between the components.

The inner bottom wall of the shell 10 is provided with a slot 11, and two opposite side walls of the slot 11 are respectively inner side walls 13 on two opposite sides of the shell 10, namely the inner side walls 13 on two opposite sides of the shell 10 are taken as slot walls of the slot 11 in the length direction; a guide plate 12 is arranged in the middle of the slot 11 to divide the slot 11 into two sub-slots, each sub-slot being used for accommodating one cooling fan 21; when the two cooling fans 21 are respectively assembled into the two sub-slots, one side wall (outer side wall 222) of the damping sleeve 22 corresponding to each cooling fan 21 abuts against the inner side wall 13 of the housing 10, and the other opposite side wall abuts against the guide plate 12 (i.e. the damping sleeve 22 corresponding to each cooling fan 21 abuts between the inner side wall 13 of the housing 10 and the guide plate 12), so that the two cooling fans 21 are arranged side by side; the projector size can be reduced as much as possible in the length direction of the slot 11, and the heat radiation fan 21 does not occupy redundant space, so that the space utilization is effectively improved, and the assembly is more compact. Meanwhile, the damping sleeve 22 is spaced from the inner wall of the housing 10 and the slot 11 of the cooling fan 21, so that the vibration generated by the cooling fan 21 is reduced and transmitted to the housing 10, and the influence on the projection picture caused by the transmission of the vibration of the housing 10 to the lens is further avoided. In addition, the side walls of the slot 11 and the surfaces of the guide plate 12 in some embodiments are flat surfaces to facilitate the installation of the cooling fan 21 and the damper sleeve 22.

After the cooling fan 21 is assembled into the slot 11 along with the damping sleeves 22 sleeved outside, the cover support 30 covers the tops of the two damping sleeves 22; the cover bracket 30 has side openings 31 at opposite sides in the length direction such that one side wall of the damper sleeve 22 protrudes from the side openings 31 to abut against the inner side wall 13 of the housing 10. After the cover support 30 is covered in the damping sleeve 22, two sides of the damping sleeve 22 can pass through the side openings 31 to abut against the inner wall of the casing 10, so that the dimension of the projector in the length direction of the cover support 30 can be compressed as much as possible.

The cover bracket 30 is detachably connected to the inner wall of the housing 10 and/or the groove wall of the slot 11 to fix the fan assembly 20 in the housing 10. Referring to fig. 5 and 6, a plurality of screw holes 111 are formed above the slot 11, and the assembly holes 34 are formed at the lower end of the cover bracket 30, so that when the cover bracket 30 covers the top of the damping sleeve 22 corresponding to the cooling fan 21, the assembly holes 34 and the corresponding screw holes 111 can be assembled respectively by the screws 50, so that the cover bracket 30 and the slot 11 are locked, and both the cooling fan 21 and the damping sleeve 22 are fixed in the slot 11.

The two damping sleeves 22 are respectively provided with a first wire guide 223, the corresponding positions on the cover support 30 are provided with a second wire guide 32, and wires of the cooling fan 21 pass through the first wire guide 223 and the second wire guide 32 which are corresponding in position, so that the wires of the cooling fan 21 can be further connected to a main control circuit board in the projector.

The cover support 30 is provided with a plurality of connecting parts 33, and the connecting parts 33 are used for fixedly connecting the main board and/or the radiator of the main board. In this embodiment, the connection portion 33 is a threaded column, and can fix the motherboard and/or the heat sink of the motherboard located at the top of the cover bracket 30 by cooperating with screws. After the main board is fixed on the cover support 30, the main board extends towards the direction of the air inlet side of the cooling fan 21, so that a more closed air inlet channel can be formed by matching with the inner side wall 13 of the shell 10 in front of the air inlet side of the cooling fan 21, the air inlet is more concentrated, the heat radiation efficiency is improved, and meanwhile, the back flow of hot air at the air outlet side of the cooling fan 21 from the top to the air inlet side of the cooling fan 21 is reduced. In some embodiments, after the motherboard is fixed to the cover support 30, the distance between the motherboard and the top of the cover support 30 is less than 5mm.

Referring to fig. 7, the housing 10 is provided with an air outlet 14 (the air outlet 14 is only schematically shown and should be formed by a grille, not shown in the drawings), the heat dissipating assembly 40 is disposed in the housing 10 and located between the air outlet side of the heat dissipating fan 21 and the air outlet 14 of the housing 10, and the heat dissipating assembly 40 is configured to receive heat from a heat generating component in the projection device, for example, a high heat generating component (e.g., a light source, a spatial light modulator, etc.) in the projector, and is connected to the heat dissipating assembly 40 through a heat conducting tube to conduct the heat to the heat dissipating assembly 40. Further, referring to fig. 8, the heat dissipation assembly 40 completely covers the projection of the air outlet of the heat dissipation fan 21 along the air outlet direction. Specifically, the heat dissipating assembly 40 adopts a multi-layer heat dissipating fin structure, and the air outlet 14 (the air outlet 14 is in a grid shape, not shown) of the housing 10 is located behind the heat dissipating fins, and the heat dissipating fan 21 can blow air flow through the heat dissipating fins to blow heat of the heat dissipating fins out from the air outlet of the housing 10. Since in the present embodiment, the opposite outer side walls 222 of the two silicone jackets 22 sleeved outside the two heat dissipation fans 21 are respectively contacted with the inner side wall 13 of the housing 10, and the adjacent side walls of the two silicone jackets 22 are respectively abutted with the guide plate 12, other gaps or air openings are blocked in the lateral direction, so that the hot air caused by the heat dissipation fins is prevented from flowing back to the optical machine position from between the adjacent heat dissipation fans 21 or between the heat dissipation fans 21 and the inner side wall of the housing 10.

In some other embodiments, the fan assembly 20 may further include a cooling fan 21 and a damping sleeve 22, where the slot 11 may not be provided therein with the guide plate 12, and two side walls of the damping sleeve 22 sleeved outside the cooling fan 21 respectively extend from side openings 31 formed on two opposite sides of the cover bracket 30 in the length direction so as to respectively abut against two side walls of the opposite sides of the housing 10; without sandwiching the side wall of the cover holder 30, the size of the projector is further reduced.

In some other embodiments, the fan assembly 20 may further include more than two cooling fans 21 and more than two damping sleeves 22, where the cooling fans 21 are in one-to-one correspondence with the damping sleeves 22, and each cooling fan 21 is sleeved in a corresponding damping sleeve 22, and the more than two damping sleeves 22 are also arranged side by side so that the front or back of each damping sleeve 22 is on the same plane.

When the fan assembly 20 includes two or more heat dissipation fans and a corresponding number of damper jackets, the sidewalls of the adjacent two damper jackets 22 may directly abut against each other or may indirectly abut against each other.

When the side walls of the two adjacent damping sleeves 22 are directly abutted against each other, the outer side walls of the two outermost damping sleeves 22 are also respectively abutted against the two groove walls of the slot 11 in the length direction (i.e., the inner side walls 13 of the opposite sides of the housing 10), and at this time, other gaps or air openings are also blocked in the transverse direction, so that the hot air caused by the heat dissipation assembly 40 can be prevented from flowing back to the optical machine position from between the adjacent heat dissipation fans 21 or between the heat dissipation fans 21 and the inner side walls 13 of the housing 10.

When the side walls of two adjacent damping sleeves 22 are indirectly abutted against each other, a slot 11 is provided on the inner bottom wall of the housing 10, at least one guide plate 12 is provided in the slot 11 to divide the slot 11 into at least two sub-slots, each sub-slot is used for accommodating one cooling fan 21, at least one side wall of the damping sleeve 22 corresponding to each cooling fan 21 is abutted against the guide plate 12 (when the fan assembly 20 comprises more than three cooling fans 21 and a corresponding number of damping sleeves 22, two side walls of the damping sleeves 22 corresponding to the cooling fans 21 on two sides are respectively abutted against the inner side wall 13 of the housing 10 and the guide plate 12, and two side walls of the damping sleeve 22 corresponding to the cooling fan 21 in the middle are respectively abutted against the two adjacent guide plates 12), and at this time, the side walls of the two damping sleeves 22 corresponding to each other are respectively abutted against the opposite side walls of the same guide plate 21, i.e. are indirectly abutted against each other. The side walls at two sides of the slot 11 are two opposite side walls at two sides of the housing 10, and the side walls at two sides of the slot 11 are respectively abutted against the side wall of one damping sleeve 22. At this time, as in the foregoing preferred embodiment, other gaps or tuyeres may be blocked laterally as well, preventing the hot air passing through the heat dissipating assembly 40 from flowing back to the bare engine position from between the adjacent heat dissipating fans 21 or between the heat dissipating fans 21 and the inner side wall 13 of the housing 10.

According to the projection equipment provided by the embodiments of the utility model, the damping sleeve is sleeved on the cooling fan, and the cooling fan is abutted against the inner side wall 13 of the projector shell through the damping sleeve, so that the occupied space of the cooling fan in the projector is reduced while vibration reduction is taken into consideration, and the improvement of the space utilization efficiency in the projector is facilitated.

The background section of the present utility model may contain background information about the problem or environment of the present utility model rather than the prior art described by others. Accordingly, inclusion in the background section is not an admission of prior art by the applicant.

The foregoing is a further detailed description of the utility model in connection with specific/preferred embodiments, and it is not intended that the utility model be limited to such description. It will be apparent to those skilled in the art that several alternatives or modifications can be made to the described embodiments without departing from the spirit of the utility model, and these alternatives or modifications should be considered to be within the scope of the utility model. In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "preferred embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction. Although embodiments of the present utility model and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the scope as defined by the appended claims.

Claims (10)

1. A projection device, comprising a housing and a fan assembly, wherein the fan assembly comprises a radiator fan and a damping sleeve, and the radiator fan is sleeved in the damping sleeve and is fixed in the housing through the damping sleeve; the two opposite inner side walls of the shell extend towards the air inlet side of the cooling fan.

2. The projection device of claim 1, wherein at least one side wall of the damping sleeve abuts against an inner side wall of the housing or a gap of 5mm or less exists.

3. The projection device of claim 1, further comprising a cover bracket that covers the top of the damping sleeve and is fixedly connected to the housing to secure the fan assembly within the housing.

4. A projection apparatus according to claim 3 wherein the cover support is provided with side openings at opposite sides in the length direction such that at least one side wall of the damping sleeve extends from the side openings against the inner side wall of the housing.

5. A projection apparatus according to claim 3 wherein the damper sleeve is provided with a first wire guide and the cover bracket is provided with a second wire guide, and the wires of the radiator fan pass through the first wire guide and the second wire guide corresponding in position.

6. A projection apparatus according to claim 3 wherein the cover support is provided with a plurality of connection portions for fixedly connecting a main board and/or a radiator of the main board, the main board extending in a direction in which an air intake side of the heat radiation fan faces.

7. The projection device of claim 1, wherein the fan assembly includes at least two cooling fans and at least two shock absorbing sleeves, the cooling fans are in one-to-one correspondence with the shock absorbing sleeves, each cooling fan is sleeved in a corresponding shock absorbing sleeve, and the at least two shock absorbing sleeves are arranged side by side.

8. The projection device of claim 7, wherein the sidewalls of adjacent two of the shock absorbing sleeves abut; or, a slot is arranged on the inner wall of the shell, at least one guide plate is arranged in the slot to divide the slot into at least two sub-slots, and each sub-slot is used for accommodating one cooling fan; the side wall of the damping sleeve corresponding to each cooling fan is propped against the guide plate.

9. The projection device of claim 8, wherein the side walls of the slot are the inner side walls of opposite sides of the housing, respectively, and the side walls of the slot are each abutted against a side wall of one of the shock absorbing sleeves.

10. The projection device of any one of claims 1 to 9, further comprising a heat dissipating assembly, wherein the housing is provided with an air outlet, the heat dissipating assembly is disposed in the housing and between an air outlet side of the heat dissipating fan and the air outlet of the housing, and the heat dissipating assembly is configured to receive heat from a heat generating component in the projection device.