Projection equipment

Abstract

The utility model belongs to the technical field of projection equipment, and discloses projection equipment, which comprises a shell and a loudspeaker device, a first blocking part is arranged in the shell, a first cavity is formed between the first blocking part and the shell, and the first blocking part blocks air in the first cavity from air in an area, where a first electronic device is arranged, of the shell. According to the utility model, air in the first cavity can be isolated from electronic devices in other areas in the shell through the first isolation part, sound wave vibration generated by the loudspeaker device after isolation cannot be directly transmitted to the electronic devices, and the vibration reduction channel part can enlarge the space area of the installation cavity part. According to the invention, the vibration amplitude of the sound wave vibration can be reduced when the sound wave vibration is propagated in the vibration reduction channel part, and then the sound wave vibration is propagated to the outside of the shell, so that the influence of the sound wave vibration generated by the loudspeaker device on related electronic devices can be reduced, and the loudspeaker device can operate relatively stably.

Description

Technical Field

[0001] The utility model belongs to the technical field of projectors, and particularly relates to a projection device. Background Art

[0002] A projector is a device that can project images or videos onto a projection screen. The projection device includes a projector housing and a projection component (also called an optical engine module). The projection component is located inside the projector housing. The projector housing has a light exit port, and the image light beam emitted by the projection component can pass through this light exit port to exit the projector housing, so as to protect the projection component through the projector housing.

[0003] In the existing ceiling-mounted projectors, when playing music at a high volume, the whole machine will resonate, resulting in serious picture vibration. The reasons are as follows:

[0004] 1. The structural size of the projector is large;

[0005] 2. The power of the speaker is large, and the low-frequency vibration is strong;

[0006] 3. The size of the DMD device in the projection component is small. Compared with large-size DMDs, the picture is more sensitive to vibration. Summary of the Utility Model

[0007] In view of this, the purpose of the utility model is to provide a projection device to solve the problem that when the existing projection device plays sound, the whole machine will resonate, causing other electronic devices inside the projection device to vibrate and affecting their stable or normal operation.

[0008] To achieve the above purpose, the utility model adopts the following technical solutions:

[0009] The present utility model provides a projection device, which includes a housing and a sound device. A first barrier portion is provided inside the housing. A first chamber is formed between the first barrier portion and the housing. The first barrier portion blocks the air in the first chamber from the air in the area of the housing where the first electronic device is arranged. The first chamber includes an installation chamber portion and a vibration damping channel portion communicating with the installation chamber portion. The sound device is arranged in the installation chamber portion, and the tail end of the vibration damping channel portion communicates with the outside of the housing. Through the first barrier portion, the air in the first chamber where the sound device is installed can be blocked from the air in the area where the first electronic device such as a lamp board or an optical engine module is installed, so that the air between them is basically not connected. In this way, on one hand, the sound wave vibration of the sound device cannot be directly transmitted to the first electronic device to affect its normal operation. On the other hand, through the vibration damping channel portion of the first chamber, the space of the installation chamber portion for installing the sound device is increased, so that the generated sound waves can extend their propagation distance when propagating in the vibration damping channel portion with an increased installation chamber portion space, thereby reducing the amplitude of the sound waves, and finally propagating to the outside of the housing, realizing the weakening of the sound wave vibration of the sound device inside the housing, and effectively reducing the sound wave vibration when it propagates to the first electronic device, solving the problem that the first electronic device is easily affected by the vibration of the sound device and seriously vibrates, affecting its stability or normal operation.

[0010] In a possible implementation manner, the vibration damping channel portion extends and distributes inside the housing, and the tail end of the vibration damping channel portion communicates with the circumferential outside of the housing. The vibration damping channel portion with a certain extension can have a larger channel length or channel space. Furthermore, the sound wave vibration generated by the sound device can have a greater propagation distance and a longer propagation time when propagating in the vibration damping channel portion, thereby realizing the vibration damping effect of the vibration damping channel portion on the sound wave vibration. And by communicating the vibration damping channel portion with the circumferential outside of the housing, the sound wave vibration propagated to the outside of the housing can be transmitted to the first electronic device arranged at the bottom or top of the housing less or with less intensity, such as the lamp board arranged at the outer bottom of the housing.

[0011] In a possible implementation manner, the first barrier portion includes a first partition member and a second chamber protruding upward from the bottom of the housing. The first chamber is formed among the first partition member, the second chamber and the housing. The second chamber blocks the air in the first chamber from the air in the area of the housing where the first electronic device is arranged inside the housing. The second chamber formed by upward protrusion can not only be used to install the second electronic device, but also use its chamber side wall as the side wall of the first chamber, and cooperate with the housing to mainly form an installation chamber portion for installing the sound device. And because the second chamber is formed by protrusion and is basically closed, it can block the first chamber from the other areas inside the housing or the lamp board arranged at the outer bottom of the housing and make them not communicate, thereby avoiding the situation that the sound wave vibration generated by the sound device is directly transmitted to other electronic devices through the air inside the housing.

[0012] In a possible implementation, the first electronic device is a lamp board disposed at the outer bottom of the housing, and the second chamber isolates the air in the first chamber from the air in the outer area of ​​the housing where the lamp board is disposed. The lamp board for lighting the projector device is disposed at the outer bottom of the housing, and the second chamber formed by the upward protrusion can be blocked by itself, so that the sound wave vibration cannot be directly transmitted from the inside of the housing to the lamp board with a short distance and a large amplitude. The sound wave vibration after the vibration reduction treatment can be effectively reduced when it is transmitted to the lamp board, so that the lamp board can be relatively stable and will not affect its normal operation.

[0013] In a possible implementation, the shell is provided with a heat dissipation channel connected to the second chamber for heat dissipation of the second electronic device in the second chamber, and the vibration reduction channel portion is connected to the heat dissipation channel or has overlapping channel portions. The second electronic device in the second chamber, such as a power board, can discharge its heat with the airflow through the heat dissipation channel to the outside of the shell under the action of a heat dissipation fan, and the vibration reduction channel portion is connected to the second electronic device in the second chamber or has overlapping channel portions, which can facilitate the connection of the vibration reduction channel portion with the outside world and reduce the amplitude of the sound waves generated by the compressed air, and can also make better use of the heat dissipation channel to achieve sharing, so as to make fuller use of the shell space and make the structural design more reasonable.

[0014] In a possible implementation, the heat dissipation channel includes a channel portion and a connecting portion provided on the circumferential side wall of the shell, the channel portion is mainly separated in the shell by the second partition member and the first partition member, and the tail end of the vibration reduction channel portion is connected to the tail end of the channel portion. The heat dissipation channel is separated in the shell by the second partition member and the first partition member, which can not only make the vibration reduction channel portion not connected with other chamber areas of the shell when connected with the heat dissipation channel to avoid the transmission of sound wave vibration to other areas, but also realize the sharing of the channel, and the two channels are connected through the tail end, which can better prevent the transmission of sound wave vibration to the lamp board through the second chamber.

[0015] In a possible implementation, the second electronic device is a power board. The power board is large in size and occupies a large space, and the size of the second cavity accommodating it is also larger. By forming the second cavity accommodating the power board as a barrier structure, it is convenient to construct a larger installation cavity for accommodating one or more speaker components, and the barrier effect is also better.

[0016] In a possible implementation, the bottom of the housing has an opening communicating with the outside, and the second chamber communicates with the opening at the bottom of the housing. The bottom of the second chamber is open through the opening, which facilitates meeting the installation requirements of the power board. Correspondingly, the vibration reduction channel part will simultaneously communicate with the first chamber and the area where the first electronic device is arranged through the heat dissipation channel. However, since the airflow in the heat dissipation channel is unidirectional and discharged from the second chamber to the outside when dissipating heat from the second electronic device, its airflow will not blend with that of the vibration reduction channel part, thus forming an air barrier. That is to say, the spatial structure of the housing can be incompletely blocked.

[0017] In a possible implementation, at least part of the first electronic device covers the opening at the bottom. By covering the opening at the bottom, the first electronic device can block and provide a certain degree of protection for the second electronic device arranged in the second chamber, and it is also more aesthetically pleasing and reasonable.

[0018] In a possible implementation, a counterweight is provided in the installation cavity part. By avoiding the resonance point of the resonance frequency of the counterweight housing in the installation cavity part, the structural design is more reasonable.

[0019] In a possible implementation, the installation cavity part includes two first installation positions and a second installation position located between the two first installation positions. Each first installation position is respectively provided with the sound-emitting device, and the second installation position is provided with the counterweight. By arranging the counterweight between the two sound-emitting devices, the vibration amplitude of the two sound-emitting devices on the bottom of the housing can be reduced simultaneously, and the resonance frequency of the bottom cover can be changed to avoid the resonance point, making the structural design more reasonable.

[0020] In a possible implementation, a damping component is provided between the sound-emitting device and the housing; the damping component includes multiple groups of damping support components and fasteners for fixing the damping support components. The damping support component includes a first flexible damping member and a second flexible damping member. The first flexible damping member is arranged on the first connecting part of the housing, and the second flexible damping member is arranged on the second connecting part of the sound-emitting device. The first connecting part and the second connecting part are connected by fasteners, and the first flexible damping member abuts against the second flexible damping member. The damping support component is respectively arranged on the first connecting part of the housing and the second connecting part of the sound-emitting device through the first flexible damping member and the second flexible damping member, which can enable the vibration transmitted by the sound-emitting device through the first connecting part to be damped by the two damping members, and the first connecting part and the second connecting part can be blocked by the first flexible damping member and the second flexible damping member, avoiding direct contact between the second connecting part and the fasteners and the second connecting part. In this way, the vibration transmission of the sound-emitting device to the housing during sound emission can be reduced, thereby reducing the vibration of the housing driving devices such as the lamp board and the optical engine module installed on the housing.

[0021] In a possible implementation, the second connecting part includes a through hole for a fastener to pass through. The second flexible shock absorber includes a cylindrical part and flanging parts respectively arranged at two axial ends of the cylindrical part. The cylindrical part is embedded in the through hole, and the flanging parts are attached to the edge of the end side of the through hole. The second flexible shock absorber can facilitate the passing of the through hole of the second connecting part through the cylindrical part, and cooperate with the flanging parts at both ends to form a covering structure capable of covering the second connection, so that the vibration transmission between the second connecting part and the fastener and between the second connecting part and the housing can be blocked, and the vibration transmitted by the sound device can be more effectively reduced.

[0022] In a possible implementation, shock-absorbing convex parts I are arranged on the end faces of the flanging parts at at least one end and are distributed circumferentially along the through hole. Through the shock-absorbing convex parts I, contact with the fastener can be made with a smaller contact area, and the vibration caused by the second connecting part of the sound device to the fastener can be further reduced.

[0023] In a possible implementation, a number of shock-absorbing convex parts II are distributed circumferentially along the through hole on the inner wall of the cylindrical part that matches the fastener. Through the shock-absorbing convex parts II, the vibration caused by the second connecting part of the sound device to the housing can be further reduced.

[0024] In a possible implementation, the first connecting part includes a fastening hole for connecting with a fastener. The first flexible shock absorber includes a cushioning part surrounding the outer periphery of the fastening hole, and a number of annular protrusions are arranged on the cushioning part. The cushioning part can block the second connecting part of the housing from the first shock absorber, can play a shock-absorbing role axially, and can reduce the contact area with the second flexible shock absorber through the annular protrusions, thereby reducing the vibration transmission between the two.

[0025] In a possible implementation, the first connecting part further includes a columnar part, the fastening hole is arranged at the end of the columnar part, and the first flexible shock absorber further includes a sleeve part sleeved on the periphery of the columnar part and connected to the cushioning part. The first flexible shock absorber can be covered on the end of the columnar body through the sleeve part, and cooperate with the cushioning part to better reduce the vibration transmission to the columnar body and then to the housing, further reducing the vibration transmission.

[0026] In a possible implementation, only two groups of shock-absorbing support components are fixed by fasteners, and the remaining shock-absorbing support components are not fixed. On the basis of installing multiple groups of shock-absorbing support components as speakers, only two of them are locked and fixed by fasteners, which can reduce the fasteners, thereby increasing the freedom degree of the sound device and reducing the vibration transmission.

[0027] In a possible implementation, the top of the shell is provided with a first vibration-damping hole connected to the first chamber; and / or the top of the shell is provided with a plurality of second vibration-damping holes along the circumferential direction. By providing the first vibration-damping hole connected to the first chamber at the top of the shell, the vibration of the top cover caused by the sound wave can be reduced, which is conducive to reducing the vibration of the whole machine; by providing the second vibration-damping holes along the circumferential direction at the top of the shell, the rigidity of the top can be reduced to reduce the vibration.

[0028] In a possible implementation, the projection device further includes an elastic dust cover, the elastic dust cover is disposed between the lens assembly contained in the housing and the housing, and the elastic dust cover has a first hardness to hold the lens assembly. The elastic dust cover with a certain hardness can exert a certain elastic holding force on the lens, and when the optical machine lens vibrates, the lens is supported to a certain extent to reduce the vibration of the lens assembly.

[0029] Compared with the prior art, the utility model has the following beneficial effects:

[0030] The projection device of the utility model can isolate the air in the first chamber from the electronic devices in other areas of the shell through the first blocking part. After the blocking, the sound wave vibration generated by the speaker will not be directly transmitted to the electronic devices, and the vibration reduction channel part can increase the spatial area of ​​the installation cavity part, so that the amplitude of the sound wave vibration can be reduced when propagating in the vibration reduction channel part, and then propagate to the outside of the shell, thereby achieving the effect of the sound wave vibration generated by the speaker on the related electronic devices can be reduced, so that they can operate relatively stably.

[0031] Moreover, the projection device avoids the resonance point and reduces the amplitude from two dimensions of blocking the vibration of the speaker and the sound wave vibration, thereby reducing the vibration transmitted to the optical machine module, thereby improving the undesirable situation that the vibration of the picture is caused by the vibration of the speaker driving the vibration of the optical machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a stereoscopic schematic diagram of a projection device at a first viewing angle;

[0033] Figure 2 A schematic diagram of the internal structure of a projection device after the top cover is hidden;

[0034] Figure 3 A top view of a housing of a projection device when the top plate is hidden, the view also shows the airflow direction and the sound wave propagation direction of the heat dissipation channel and the vibration reduction channel;

[0035] Figure 4 A stereoscopic view of a housing of a projection device when viewed from above;

[0036] Figure 5 A three-dimensional view of a housing of a projection device, wherein the top plate is hidden;

[0037] Figure 6 It is an exploded view of the lamp board and the housing of a projection device in the upward viewing direction;

[0038] Figure 7 It is Figure 2 a partial enlarged schematic view of part A in

[0039] Figure 8 It is a connection sectional view of the shock-absorbing support assembly of a projection device and connecting part 1 and connecting part 2;

[0040] Figure 9 It is a schematic view of the connection structure of the sound-emitting device and the shock-absorbing support assembly of a projection device, and this schematic view also shows the exploded state of a set of shock-absorbing support assemblies;

[0041] Figure 10 It is an exploded schematic view of the shock-absorbing support assembly of a projection device;

[0042] Figure 11 It is a three-dimensional view of flexible shock-absorbing part 1 of the shock-absorbing support assembly of a projection device.

[0043] In the figure: 1 - housing; 11 - housing main body; 12 - top cover; 14 - first chamber; 141 - first installation position; 142 - second installation position; 15 - vibration reduction channel part; 16 - communication part; 17 - heat dissipation channel; 18 - sound outlet part; 19 - fastening hole; 110 - connecting part 1; 111 - first shock-absorbing hole; 112 - second shock-absorbing hole; 113 - second chamber; 114 - second partition member; 115 - first partition member; 116 - column part; 117 - opening; 2 - shock-absorbing support assembly; 21 - fastener; 22 - flexible shock-absorbing part 2; 221 - flanging part; 222 - cylinder part; 223 - first shock-absorbing convex part; 224 - second shock-absorbing convex part; 23 - flexible shock-absorbing part 1; 231 - cushioning connection part; 232 - sleeve part; 233 - annular protrusion; 234 - third shock-absorbing convex part; 24 - nut part; 3 - sound-emitting device; 31 - connecting part 2; 311 - connecting ear; 312 - through hole; 4 - lens assembly; 5 - elastic dust-proof sleeve; 6 - optical engine module; 7 - counterweight; 8 - lamp board; 9 - air-cooled radiator; 10 - power board. Specific embodiments

[0044] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with specific embodiments.

[0045] Please refer to Figure 1 and Figure 2 As shown, the embodiments of the present application provide a projection device, including a housing 1 and a sound-emitting device 3.

[0046] Projector devices are designed in different sizes due to different installation or usage methods. For example, ceiling-mounted projectors generally have a horizontal or radial layout in their structural layout, which makes their structural size relatively large. Most of the components including the sound device 3 in the projector are mainly installed on the bottom cover or bottom plate of the housing 1. And because the speaker has a large power and strong low-frequency vibration, while the DMD device is small in size, compared with large-size DMD devices, the picture is more sensitive to vibration. This leads to resonance of the whole machine and serious picture vibration when the sound device 3 plays a relatively loud sound.

[0047] To solve this problem, please refer to Figure 2-5 As shown, in the embodiment of the present application, a first barrier portion is provided in the housing 1. A first chamber 14 is formed between the first barrier portion and the housing 1. The first barrier portion blocks the air in the first chamber 14 from the air in the area of the housing 1 where the first electronic components are arranged.

[0048] Among them, the first barrier portion divides and forms the first chamber 14 in the housing 1, and the sound device 3 is arranged in the first chamber 14. The second barrier component can also block the air between the first chamber 14 and the area of the housing 1 where the first electronic components are arranged, so that the air in the two is not connected. Furthermore, it can avoid the sound wave vibration generated when the speaker plays from being transmitted to other components through the air inside the housing 1 and affecting their stability or operation. The first electronic component can be the optical engine module 6 or the lamp board 8 of the projection device. When the first electronic component is the optical engine module 6, through the above structure, it is beneficial to reduce the vibration of the sound device 3 on the optical engine module 6, so as to reduce the vibration of the picture; when the first electronic component is the lamp board 8, the vibration of the lamp board 8 can be reduced.

[0049] It can be understood that the barrier mainly refers to the air barrier or non-connection of the relative space, which is not absolute and can be understood as complete barrier or incomplete barrier, such as basic barrier. However, there is also a certain connection in the structure, so that the sound wave vibration in the sound device 3 in the first chamber 14 basically will not be transmitted to the first electronic component through the air and affect its stability or normal operation, or when there is a certain connection and it is transmitted to the first electronic component, its vibration influence can be ignored, so as to avoid the need for some connection structures that meet other functional designs. For example, heat dissipation requires the connection of two spaces, but the heat dissipation air flow is generally a one-way flow from inside to outside, which will not cause the sound wave vibration to be transmitted inward. This situation can also be called a kind of barrier.

[0050] At the same time, in the embodiment of the present application, the first chamber 14 may include an installation cavity portion and a vibration reduction channel portion 15 communicating with the installation cavity portion. The installation cavity portion is provided with the sound device 3, and the tail end of the vibration reduction channel portion 15 communicates with the outside of the housing 1.

[0051] Since the sound device 3 is in a narrow cavity, the vibration of the tympanic membrane compresses the air in the cavity, and the intensity of the sound wave vibration will increase. The vibration of the sound wave transmitted to other areas will be even greater, causing the relevant electronic devices in the housing 1 to be driven to vibrate, which in turn affects the stability or normal operation of the electronic devices. And through the vibration reduction channel part 15 of the first chamber 14, the space of the installation chamber part can be increased, so that the sound wave vibration generated by the sound device 3 can travel a greater distance in the vibration reduction channel part 15. This can help reduce the amplitude of the sound wave, and by communicating with the outside of the housing 1, it can more effectively reduce the amplitude of the sound wave generated by the compressed air and prevent the sound wave from being transmitted to the inside of the housing 1. Of course, the installation chamber part is provided with a sound outlet part 18 for sound release.

[0052] Through the above technical solution, the first barrier part can separate the first chamber 14 where the sound device 3 is installed from the area where the first electronic devices such as the lamp board 8 or the optical engine module 6 are installed, so that the air between them is basically not connected. In this way, the sound wave vibration of the sound device 3 cannot be directly transmitted to the first electronic device to affect its normal operation, and at the same time, the space of the installation chamber part for installing the sound device 3 is increased through the vibration reduction channel part 15 of the first chamber 14, so that the generated sound wave can extend its propagation distance when propagating in the vibration reduction channel part 15 with an increased installation chamber part space, thereby reducing the amplitude of the sound wave, and finally propagating to the outside of the housing 1, realizing the weakening of the sound wave vibration of the sound device 3 inside the housing 1, and effectively reducing the sound wave vibration when it propagates to the first electronic device, solving the problem that the first electronic device is easily affected by the vibration of the sound device 3 and seriously vibrates, affecting its stability or normal operation.

[0053] In one embodiment, the vibration reduction channel part 15 extends and distributes inside the housing 1, and the tail end of the vibration reduction channel part 15 communicates with the circumferential outside of the housing 1.

[0054] In this way, the vibration reduction channel part 15 with a certain extension can have a greater channel length or channel space, and then the sound wave vibration generated by the sound device 3 can travel a greater distance and a longer propagation time when propagating in the vibration reduction channel part 15, so as to realize the vibration reduction effect of the vibration reduction channel part 15 on the sound wave vibration. And by communicating the vibration reduction channel part 15 with the circumferential outside of the housing 1, the sound wave vibration transmitted to the outside of the housing 1 can be less or smaller and transmitted to the first electronic device set at the bottom or top of the housing 1, such as the lamp board 8 set at the outer bottom of the housing 1.

[0055] In the specific implementation process, the extension mode of the vibration reduction channel part 15 can be linear extension, arc extension, or other channel structures that can increase the propagation distance, without limitation.

[0056] In a preferred embodiment of the first barrier portion, the first barrier portion includes a first partition member 115 and a second chamber 113 that protrudes upward from the bottom of the housing 1. A first chamber 14 is formed between the first partition member 115, the second chamber 113, and the housing 1. The second chamber 113 separates the first chamber 14 from the area of the housing 1 where the first electronic device is disposed within the housing 1.

[0057] The second chamber 113 formed by protruding upward can be used to mount a second electronic device such as a power supply board, and its chamber sidewall can serve as the sidewall of the first chamber 14 and cooperate with the housing 1 to mainly form a mounting cavity for mounting the speaker device 3. And because the second chamber 113 is formed by protruding and is substantially enclosed, it can separate the first chamber 14 from the area of the housing 1 where other components are located inside the housing 1 or the lamp board 8 disposed at the outer bottom of the housing 1, so as to avoid the situation that the sound wave vibration generated by the speaker device 3 is directly transmitted from the inner space of the housing 1 to other electronic devices through the air.

[0058] Preferably, as shown in Figure 2 and Figure 4 the first electronic device is the lamp board 8 disposed at the outer bottom of the housing 1. The second chamber 113 separates the first chamber 14 from the area outside the housing 1 where the lamp board 8 is disposed. Since the lamp board 8 disposed at the outer bottom of the housing 1 has a thickness of only.mm and a large diameter, the area where the lamp board 8 is disposed is hollowed out and communicates with the area inside the housing 1 where the speaker device 3 is disposed. Under the influence of sound waves, the amplitude is strong and it is easy to shake. And the shaking of the lamp board 8 will be transmitted to the optical engine area through the bottom of the housing 1, resulting in the picture being easy to shake. However, through the blocking effect of the first chamber 14, the air between them is not connected, so that the sound wave vibration of the speaker device 3 can be blocked from being transmitted to the lamp board 8, thereby reducing vibration from the dimension of weakening sound wave vibration and avoiding vibration being transmitted to the lamp board 8 and the optical engine module 6 and affecting their work.

[0059] In order to make more full and reasonable use of the space of the housing 1, further, as shown in Figure 2 and Figure 3 a heat dissipation channel 17 communicating with the second chamber 113 for dissipating heat from the second electronic device in the second chamber 113 is further provided inside the housing. The vibration reduction channel portion 15 communicates with the heat dissipation channel 17 or has overlapping channel portions.

[0060] In this way, the second electronic device installed in the second chamber 113 can be a power supply board. Under the action of the cooling fan, its heat can be discharged outside the housing 1 through the cooling channel 17 along with the air flow to achieve heat dissipation. The vibration damping channel portion 15 can be connected to the outside or have overlapping channel portions, which can not only facilitate the connection of the vibration damping channel portion 15 to the outside and reduce the amplitude of the sound wave generated by air compression, but also make better use of the cooling channel 17 for sharing, so as to make more full use of the space of the housing 1, and the structural design is more reasonable.

[0061] Since the air flow in the cooling channel 17 is discharged from the inside to the outside under the action of the cooling fan, although there is a certain connection between the cooling channel 17 and the vibration damping channel portion 15, the air flow between them does not affect each other. The sound wave vibration in the first chamber 14 basically will not be transmitted to the second chamber 113 and the area of the lamp board 8 through the cooling channel 17, and the blocking of the sound wave vibration can also be realized in this way.

[0062] In the specific implementation process, in combination with Figure 2 and Figure 3 As shown, the cooling channel 17 includes a channel portion and a communication portion 16 provided on the circumferential side wall of the housing 1. The channel portion is mainly separated in the housing 1 by the second partition member 114 and the first partition member 115. The tail end of the vibration damping channel portion 15 is communicated with the tail end of the channel portion. The cooling channel 17 is separated in the housing 1 by the second partition member 114 and the first partition member 115, which can not only prevent the vibration damping channel portion 15 from being connected to other chamber areas of the housing 1 when connected to the cooling channel 17 to avoid the transmission of sound wave vibration to other areas, but also realize the sharing of the channels. And the two channels are communicated through the tail ends, which can better prevent the sound wave vibration from being transmitted to the lamp board 8 through the second chamber 113.

[0063] It can be understood that the second partition member 114 can be an independent member that, together with the housing 1 and the first partition member 115, encloses a heat dissipation channel 17, or it can cooperate with other devices or chambers inside the projection device to enclose the heat dissipation channel 17, without any limitation. For example, the second partition member 114 blocks between the second chamber 113 and the air-cooled radiator 9, while the first partition member 115 blocks between the heat dissipation channel 17 and the first chamber 14. The side wall of the first partition member 115 and the second chamber 113 close to the first chamber 14 cooperate with the housing 1 to enclose a region that is not connected to the region of the optical engine module 6. In this way, the sound wave vibrations generated by the sound device 3 will not be transmitted to the optical engine module 6 through the air. And through the second partition member 114, a first chamber 14 with a vibration reduction channel portion 15 and a mounting cavity portion can be further partitioned in this region. At the same time, the tail end of the vibration reduction channel portion 15 is made to communicate with the tail end of the heat dissipation channel 17 so that they can be shared. The communication portion 16 of the porous structure on the housing 1 that communicates with the channel portion of the heat dissipation channel 17 communicates with the outside. In this way, the amplitude of the sound wave can be reduced by guiding the propagation outward.

[0064] In a specific embodiment, please refer to Figure 6 As shown, the second electronic device is a power supply board 10. The power supply board has a large size and occupies a large space, and the size of the second chamber 113 for accommodating it is also larger. By forming the second chamber 113 for accommodating the power supply board 10 as a blocking structure, it is convenient to construct a larger mounting cavity portion for accommodating one or more sound devices 3, and the blocking effect is also better.

[0065] To facilitate the installation of the second electronic device, please continue to refer to Figure 6 As shown, an opening 117 communicating with the outside can be configured at the bottom of the housing 1, and the second chamber 11 communicates with the opening 117 at the bottom of the housing 1.

[0066] In this way, the bottom of the second chamber 11 is open through the opening 117, which is convenient to meet the installation requirements of the power supply board. Correspondingly, the vibration reduction channel portion 15 will simultaneously communicate with the first chamber 14 and the area where the first electronic device is located through the heat dissipation channel and the air. However, since the airflow in the heat dissipation channel 17 is unidirectional and discharged from the second chamber 11 when dissipating heat from the second electronic device, the airflow in it and the airflow in the vibration reduction channel portion 15 will not blend with each other and transmit sound waves inward. Therefore, an air barrier is also formed. That is to say, the space structure of the housing 1 can be incompletely blocked. To meet the design requirements of relevant devices or the housing 1 structure in terms of functional requirements, as long as a barrier is formed in the airflow or the airflows do not blend.

[0067] Specifically, the first electronic device at least partially covers the opening 117 at the bottom. By covering the opening at the bottom, the first electronic device can shield and provide a certain degree of protection to the second electronic device disposed in the second chamber 113, making it more aesthetically pleasing and reasonable.

[0068] To change the resonance frequency and vibration amplitude of the bottom of the housing 1, a counterweight 7 is provided in the installation cavity portion.

[0069] By setting the resonance frequency of the counterweight housing 1 in the installation cavity portion to avoid the resonance point, the structural design is more reasonable.

[0070] The setting of the counterweight 7 can change the stiffness of the housing 1 at the position of the sound emitting device 3 or the bottom cover of the housing 1 (i.e., the bottom of the housing 1) where the sound emitting device 3 is provided, change its resonance frequency, and at the same time increase the stiffness of the corresponding area, reduce the vibration amplitude of the vibration, and reduce the energy of the vibration of the sound emitting device 3. It can be understood that the housing 1 can be an integral structure or a structure including a bottom plate. When the housing 1 is an integral structure, the setting position of the counterweight 7 is not limited to the bottom, and can also be set on the side of the housing 1 close to the sound emitting device 3, as long as it is set close to the sound emitting device 3, it can play a role in changing the stiffness of the corresponding part and reducing the vibration amplitude. When the housing 1 is a split structure including a bottom cover, setting the counterweight 7 at the position of the bottom cover close to the sound emitting device 3 can play a better shock absorption role.

[0071] In a specific embodiment, in combination with Figure 2 and Figure 5 as shown, the installation cavity portion includes two first installation positions 141 and a second installation position 142 located between the two first installation positions 141. Each first installation position 141 is respectively provided with the sound emitting device 3, and the second installation position 142 is provided with the counterweight 7. By setting the counterweight 7 between the two sound emitting devices 3, the vibration amplitude of the two sound emitting devices 3 on the bottom of the housing 1 can be reduced simultaneously, and the resonance frequency of the bottom cover can be changed to avoid the resonance point, making the structural design more reasonable. By setting the counterweight 7 between the two sound emitting devices 3, the vibration amplitude of the two sound emitting devices 3 on the bottom cover of the housing 1 can be reduced simultaneously, and the resonance frequency of the bottom cover can be changed to avoid the resonance point, making the structural design more reasonable. Specifically, the counterweight 7 can be a counterweight 7 of 500 g, which is fixed at the position of the housing 1 where the sound emitting device 3 is provided or at the bottom cover position where the sound emitting device 3 is provided.

[0072] Please refer to Figure 5 and Figure 7 as shown. In the embodiment of the present application, a damping component can also be included, and a damping component is provided between the sound emitting device 3 and the housing 1. The vibration transmission of the speaker to the housing 1 during sound emission is reduced through the damping component, so as to reduce the vibration generated by the sound emitting device 3 from being transmitted to the housing 1.

[0073] In a preferred embodiment of the vibration damping assembly, in combination with Figure 8-10 As shown, the vibration damping assembly may include multiple sets of vibration damping support assemblies 2 and fasteners 21 for fixing the vibration damping support assemblies 2. The vibration damping support assembly 2 includes a first flexible vibration damping member 23 and a second flexible vibration damping member 22. The first flexible vibration damping member 23 is disposed on a first connecting portion 110 of the housing 1, and the second flexible vibration damping member 22 is disposed on a second connecting portion 31 of the sound emitting device 3. The first connecting portion 110 and the second connecting portion 31 are connected by the fastener 21, and the first flexible vibration damping member 23 abuts against the second flexible vibration damping member 22.

[0074] Among them, the vibration assembly includes multiple sets of vibration damping support assemblies and the fastener 21. The sound emitting device 3 is mainly supported by the vibration damping support assemblies and is in contact with or connected to the housing 1 through the vibration damping support assemblies. In this way, the vibration generated when the sound emitting device 3 plays can be transmitted to the housing 1 after being damped by the vibration damping support assemblies, and the vibration transmitted to the housing 1 will be reduced, thereby achieving the reduction of the vibration transmitted to the housing 1 and avoiding the vibration of sensitive components such as the optical engine module 6. Specifically, the first flexible vibration damping member 23 of the vibration damping support assembly is disposed on the first connecting portion 110 of the housing 1, so that the first connecting portion 110 contacts other components through the first flexible vibration damping member 23. Correspondingly, the second flexible vibration damping member 22 is disposed on the second connecting portion 31 of the sound emitting device 3, so that the second connecting portion 31 can contact other components through the second flexible vibration damping member 22. In this way, when the first flexible vibration damping member 23 abuts against the second flexible vibration damping member 22, when the sound emitting device 3 transmits vibration through the first connecting portion 110, it can pass through the first flexible vibration damping member 23 and the second flexible vibration damping member 22 and then be transmitted to the second connecting portion 31. At this time, the vibration transmitted to the housing 1 will be effectively reduced, realizing the weakening of the vibration of the speaker, and further facilitating the avoidance of the vibration of sensitive components such as the optical engine module.

[0075] In order to better reduce the vibration transmission of the second connecting portion 31 of the sound emitting device 3, the second connecting portion 31 includes a through hole 312 for the fastener 21 to pass through. The second flexible vibration damping member 22 includes a cylindrical portion 222 and flanging portions 221 respectively disposed at both axial ends of the cylindrical portion 222. The cylindrical portion 222 is embedded in the through hole 312, and the flanging portion 221 is attached to the edge of the end side of the through hole 312.

[0076] In this way, the flexible shock absorber II 22 can facilitate the through hole 312 of the connecting part II 31 to pass through the cylindrical part 222, and cooperate with the flanging parts 221 at both ends to form a covering structure capable of covering the connection II, so that the vibration transmission between the connecting part II 31 and the fastener 21 and between the connecting part II 31 and the housing 1 can be blocked, and the vibration transmitted by the sound device 3 can be more effectively reduced. Specifically, the connecting part II 31 is a connecting ear 311 on the sound device 3, and the through hole 312 and a notch communicating with the through hole 312 are provided on the connecting ear 311. In this way, during connection, it is only necessary to horizontally snap the cylindrical part 222 into the through hole 312 through the notch to achieve connection.

[0077] On this basis, since the flexible shock absorber II 22 is connected to the connecting part II 31 in a covering manner and the flexible shock absorber II 22 is relatively fixed to the connecting part II 31, only two of the multiple shock absorption support components 2 can be locked by the fastener 21. In this way, the sound device 3 can be kept relatively stable and not prone to jitter or detachment. The remaining unfixed shock absorption support components 2 mainly play a role in supporting and damping. In this way, the degree of freedom of the sound device 3 in the height direction of the shock absorption support component 2 can be increased relative to all locking, so that the sound device 3 can perform adaptive small activities to offset the generated vibration during playback, and further reduce the vibration transmission.

[0078] Furthermore, shock absorption convex parts I 223 are arranged on the end surface of the flanging part 221 at at least one end along the circumferential direction of the through hole 312.

[0079] In this way, the shock absorption convex parts I 223 can contact the fastener 21 with a smaller contact area, and can further reduce the vibration caused by the connecting part II 31 of the sound device 3 to the fastener 21.

[0080] In order to reduce the vibration transmission between the fastener 21 and the flexible shock absorber II 22, furthermore, a plurality of shock absorption convex parts II 224 are arranged on the inner wall of the cylindrical part 222 matching the fastener 21 along the circumferential direction of the through hole 312. Through the shock absorption convex parts II 224, the vibration caused by the connecting part II 31 of the sound device 3 to the fastener 21 can be further reduced, and further the vibration transmission between the fastener 21 and the housing 1 can be reduced.

[0081] In order to further reduce the vibration transmission between the flexible shock absorber I 23 and the connecting part I 110, the connecting part I 110 may include a fastening hole 19 for connecting with the fastener 21, the flexible shock absorber I 23 includes a cushioning part 231 surrounding the outer circumference of the fastening hole 19, and a plurality of annular protrusions 233 are arranged on the cushioning part 231.

[0082] The cushioning connection part 231 can isolate the second connection part of the housing 1 from the first shock-absorbing member, play a shock-absorbing role in the axial direction, and can reduce the contact area with the second flexible shock-absorbing member 22 through the annular protrusion 233, thereby reducing the vibration transmission between the two.

[0083] On this basis, the first connection part 110 may further include a cylindrical part 116, and the fastening hole 19 is arranged at the end of the cylindrical part 116. The first flexible shock-absorbing member 23 further includes a sleeve part 232 sleeved on the periphery of the cylindrical part 116 and connected to the cushioning connection part 231. The first flexible shock-absorbing member 23 can be wrapped around the end of the columnar body through the sleeve part 232, can better absorb the transmitted vibration, and can cooperate with the cushioning connection part 231 to better reduce the vibration transmitted to the columnar body and then to the housing 1, further reducing the vibration transmission. Specifically, the fastening hole 19 can be a threaded hole that is threadedly matched with the fastener 21, or a nut member 24 can be embedded in the fastening hole 19, and the nut member 24 is threadedly matched with the fastener 21, so as to facilitate connection and fixation. The cylindrical part 116 is also called a boss column, and the first flexible shock-absorbing member 23 can reduce the transmission of vibration to the boss column and the housing 1.

[0084] In the specific implementation process, in combination with Figure 11 As shown, the inner wall of the sleeve part 232 may also be provided with third shock-absorbing protrusions 234 at intervals in the circumferential direction, and the third shock-absorbing protrusions 234 abut against the surface of the fastener 21 to reduce the vibration transmission to the fastener 21.

[0085] Preferably, both the first flexible shock-absorbing member 23 and the second flexible shock-absorbing member 22 are made of silica gel material.

[0086] In the embodiment of the present application, only two groups of shock-absorbing support assemblies 2 are fixed by the fasteners 21, and the remaining shock-absorbing support assemblies 2 are not fixed.

[0087] On the basis that multiple groups of shock-absorbing support assemblies 2 are installed as speakers, only two of them are locked and fixed by the fasteners 21, which can reduce the fasteners 21, thereby increasing the degree of freedom of the speaker device 3 and reducing the vibration transmission.

[0088] In addition, the top of the housing 1 is provided with a first shock-absorbing hole 111 communicating with the first chamber 14; and / or, a plurality of second shock-absorbing holes 112 are provided along the circumference of the top of the housing 1.

[0089] By providing the first shock-absorbing hole 111 communicating with the first chamber 14 at the top of the housing 1, the vibration of the sound wave on the top cover 12 can be reduced, which is beneficial to reducing the vibration of the whole machine; by providing the second shock-absorbing holes 112 along the circumference at the top of the housing 1, the stiffness of the top can be reduced to reduce the vibration.

[0090] Please refer to Figure 2As shown, in the embodiments of the present application, the projection device further includes an elastic dust cover 5, which is disposed between the lens assembly 4 accommodated in the housing 1 and the housing 1. The elastic dust cover 5 has a first hardness to hold the lens assembly 4.

[0091] The elastic dust cover 5 is a dust-proof silicone cover. Based on the existing dust-proof silicone cover, the hardness can be increased by the manufacturer's routine adjustment of the component ratio. The dust-proof silicone cover with increased hardness can provide a certain elastic holding force for the lens. When the lens assembly 4 of the optical engine module 6 vibrates, it can support the lens assembly 4 to a certain extent and reduce the vibration of the lens assembly 4.

[0092] In the specific implementation process, the housing 1 can also be configured to include a housing body 11 with an open top and a bottom, and a top cover 12 connected to the top of the housing body 11. The lamp board 8 is arranged at the outer bottom of the housing body 11, and the first damping hole 111 and the second damping hole 112 are arranged on the top cover 12, and related devices are arranged on the bottom of the housing body 11.

[0093] In summary, the embodiments of the present application can design the structural anti-vibration system from the following two dimensions respectively to optimize the vibration situation of the optical engine:

[0094] 1. Vibration of the speaker device 3 → the boss column at the bottom of the housing 1 → reduction of the vibration of the optical engine module 6:

[0095] (1) Reduce the vibration transmission of the cavity of the speaker device 3 to the boss column through the damping parts and positioning parts made of silicone material;

[0096] (2) Reduce the attachment of the fasteners 21. The two speaker devices 3 are only attached to the BOSS column at the bottom of the housing 1 through 4 screws, increasing the degree of freedom of the speaker device 3 and reducing the vibration transmission;

[0097] 2. Weakening the sound vibration of the speaker device 3 → the bottom cover / the top cover 12 / the lamp board 8 → reduction of the acoustic wave vibration of the optical engine module 6:

[0098] (1) Add openings to the top cover 12: Reduce the stiffness of the top cover 12 and open holes directly above the speaker device 3 to reduce the acoustic wave transmission of the speaker device 3 to the top cover 12, thereby weakening the vibration of the optical engine caused by the transmission of the bottom cover;

[0099] (2) Increase the cavity area of the speaker device 3: Since the speaker is in a narrow cavity, the vibration of the diaphragm compresses the air in the cavity, increasing the intensity of the acoustic wave vibration. By increasing the vibration reduction channel part 15, the cavity area of the speaker device 3 can be increased, and the communication area between the cavity and the outside can be increased to reduce the amplitude of the acoustic wave generated by the compressed air;

[0100] (3) Isolate the connection between the area of the speaker device 3 and the area of the lamp board 8: Since the illuminating lamp board 8 has a thickness of only 0.8 mm and a large diameter, under the influence of sound waves, the amplitude is strong and it is transmitted to the optical engine area through the bottom cover. By blocking the air connection between the cavity of the speaker device 3 and the lamp board 8, the sound wave vibration of the speaker device 3 is blocked from being transmitted to the lamp board 8;

[0101] (4) Add a 500 g counterweight 7 between the two speaker devices 3 to change the stiffness of the bottom cover and the resonance frequency of the bottom cover; at the same time, increase the stiffness of the area of the bottom cover where the speaker device 3 is located, reduce the vibration amplitude of the vibration, and reduce the energy of the vibration of the speaker device 33;

[0102] (5) Increase the hardness of the dust-proof silicone sleeve of the lens assembly 4: Generate a certain elastic holding force on the lens assembly 4. When the optical engine lens vibrates, it holds the lens to a certain extent and reduces the lens vibration.

[0103] The above are only the preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as a limitation of the present invention. The protection scope of the present invention should be subject to the scope defined by the claims. For those of ordinary skill in the art, without departing from the spirit and scope of the present invention, several modifications and retouches can still be made, and these modifications and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A projection device, characterized in that, It includes a housing (1) and a sound device (3). A first barrier portion is provided inside the housing (1). A first chamber (14) is formed between the first barrier portion and the housing (1). The first barrier portion blocks the air in the first chamber (14) from the air in the area of the housing (1) where the first electronic device is provided. The first chamber (14) includes an installation chamber portion and a vibration reduction channel portion (15) communicating with the installation chamber portion. The installation chamber portion houses the sound device (3). The tail end of the vibration reduction channel portion (15) communicates with the outside of the housing (1).

2. The projection device according to claim 1, characterized in that, The vibration reduction channel portion (15) extends and distributes inside the housing (1). The tail end of the vibration reduction channel portion (15) communicates with the circumferential outside of the housing (1).

3. A projection device according to claim 1, characterized in that, The first barrier portion includes a first partition member (115) and a second chamber (113) protruding upward from the bottom of the housing (1). The first chamber (14) is formed between the first partition member (115), the second chamber (113) and the housing (1). The second chamber (113) blocks the air in the first chamber (14) from the air in the area of the housing (1) where the first electronic device is provided from inside the housing (1).

4. The projection device according to claim 3, wherein, The first electronic device is a lamp board (8) provided at the outer bottom of the housing (1). The second chamber (113) blocks the air between the first chamber (14) and the outside area of the housing (1) where the lamp board (8) is provided from inside the housing (1).

5. A projection device according to claim 3 or 4, characterized in that, A heat dissipation channel (17) communicating with the second chamber (113) is provided inside the housing (1) for dissipating heat of the second electronic device in the second chamber (113). The vibration reduction channel portion (15) communicates with the heat dissipation channel (17) or has an overlapping channel portion.

6. A projection device according to claim 5, wherein The heat dissipation channel (17) includes a channel portion and a communication portion (16) provided on the circumferential side wall of the housing. The channel portion is mainly separated by a second partition member (114) and the first partition member (115) inside the housing (1). The tail end of the vibration reduction channel portion (15) communicates with the tail end of the channel portion.

7. A projection device according to claim 5, characterized in that, The second electronic device is a power supply board (10).

8. A projection device according to claim 5, characterized in that The bottom of the housing (1) has an opening (117) communicating with the outside. The second chamber (113) communicates with the opening (117) at the bottom of the housing (1).

9. A projection device according to claim 8, characterized in that, The first electronic device at least partially covers the opening (117) at the bottom.

10. A projection device according to claim 1, characterized in that, A counterweight (7) is provided inside the installation chamber portion.

11. A projection device according to claim 10, characterized in that, The installation chamber portion includes two first installation positions (141) and a second installation position (142) located between the two first installation positions (141). Each first installation position (141) houses the sound device (3) respectively. The second installation position (142) houses the counterweight (7).

12. A projection device according to claim 1, characterized in that, A first vibration reduction hole (111) communicating with the first chamber (14) is provided at the top of the housing (1); and / or, a plurality of second vibration reduction holes (112) are provided along the circumference at the top of the housing (1).

13. A projection device according to claim 1, characterized in that, The projection device further includes an elastic dust-proof sleeve (5). The elastic dust-proof sleeve (5) is provided between the lens assembly (4) accommodated inside the housing (1) and the housing (1). The elastic dust-proof sleeve (5) has a first hardness to hold the lens assembly (4).

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