Projection equipment

Abstract

The utility model discloses projection equipment which comprises a shell, and the shell comprises a bottom plate and a top cover. An opening is formed in the side wall of the bottom plate; the decoration panel is arranged at the opening position of the bottom plate; the decoration panel comprises a bottom surface and a side surface which are connected with each other; the side face of the decoration panel is provided with a sound receiving channel communicated with the interior of the decoration panel. The circuit board is arranged on the bottom surface of the decoration panel; a microphone is arranged on the circuit board, and the microphone is arranged at a position corresponding to the sound receiving channel; wherein the bottom surface of the decoration panel is provided with a communicating groove surrounding a channel opening of the sound receiving channel, the communicating groove in the bottom surface and the bottom surface are integrally formed, and an elastic sealing piece is arranged in the communicating groove to seal the sound receiving channel of the microphone. Therefore, the traditional buffer foam is replaced, the procedure of pasting the buffer foam is reduced, and the assembly efficiency and the production consistency are remarkably improved. The bottom plate and the communicating groove are integrally formed, the shape and size of the section of the sealing piece are allowed to be flexibly designed, and it is ensured that the sealing effect is stable and the dustproof performance is better.

Description

Technical Field

[0001] This application relates to the field of projection technology, and more particularly to a projection device. Background Technology

[0002] As display products continue to grow in size, considering factors such as power consumption, weight, and size, the market for projection display products as a large-screen alternative to televisions is rapidly expanding.

[0003] Current small and medium-sized projector products have built-in far-field sound pickup capabilities. Typically, the microphone is attached to a circuit board, forming a sound pickup channel on the outer casing. Sound is picked up by aligning the microphone with the casing and then sealed with cushioning foam. The specific process involves manually assembling the cushioning foam onto the microphone's circuit board, then assembling the circuit board to the casing. The compression and sealing properties of the foam seal the microphone's circuit board and the casing, ensuring the integrity of the sound pickup channel.

[0004] However, foam is die-cut and requires a regular shape, which cannot be finely adjusted. Furthermore, manual operation introduces uncertainties, resulting in poor product consistency. Utility Model Content

[0005] This application provides a projection device, including:

[0006] The housing includes a base plate and a top cover; the side wall of the base plate is provided with an opening;

[0007] A decorative panel is disposed at the opening position of the base plate; the decorative panel includes a bottom surface and a side surface that are connected to each other; the side surface of the decorative panel is provided with a sound receiving channel that communicates with the interior of the decorative panel;

[0008] A circuit board is disposed on the bottom surface of the decorative panel; a microphone is disposed on the circuit board, and the microphone is disposed at a position corresponding to the sound receiving channel;

[0009] The decorative panel has a connecting groove on its bottom surface that surrounds the opening of the radio channel, and the connecting groove is an integral structure with the bottom surface. An elastic sealing element is provided in the connecting groove, and the elastic sealing element contacts the circuit board to seal the radio channel.

[0010] In some embodiments of this application, a flow channel is further provided on the bottom surface of the decorative panel, the flow channel being connected to the communicating groove; and the elastic sealing element is provided inside the flow channel.

[0011] In some embodiments of this application, the connecting groove, the flow channel, and the bottom surface of the decorative panel are integrally injection molded structures.

[0012] In some embodiments of this application, the flow channel includes a first extension and a second extension, wherein the first extension and the second extension are arranged crosswise.

[0013] The first extension connects the communicating grooves together; the second extension extends to the side of the decorative panel.

[0014] In some embodiments of this application, the resilient seal is made of a light-transmitting material;

[0015] The circuit board is also equipped with a light source, which emits light towards the elastic seal, and the elastic seal conducts the received light internally.

[0016] In some embodiments of this application, the resilient seal is made of liquid silicone.

[0017] In some embodiments of this application, the hardness of the elastic seal is A30 to A40.

[0018] In some embodiments of this application, the bottom surface of the decorative panel is made of polymer material or metal material.

[0019] In some embodiments of this application, the elastic seal located in the communicating groove includes a first part and a second part; the first part is located above the second part and contacts the circuit board; the width of the first part is smaller than the width of the second part.

[0020] In some embodiments of this application, the thickness of the first part of the elastic seal is 0.05 mm to 0.2 mm; the width of the first part is 0.1 mm to 0.3 mm.

[0021] The projection device provided in this application includes: a housing, comprising a base plate and a top cover; an opening is provided on the side wall of the base plate; a decorative panel is disposed at the opening of the base plate; the decorative panel includes a bottom surface and a side surface connected to each other; a sound receiving channel communicating with the interior of the decorative panel is provided on the side surface of the decorative panel; a circuit board is disposed on the bottom surface of the decorative panel; a microphone is disposed on the circuit board, and the microphone is positioned corresponding to the sound receiving channel; wherein, a connecting groove surrounding the opening of the sound receiving channel is provided on the bottom surface of the decorative panel, the connecting groove on the bottom surface is integrally formed with the bottom surface, and an elastic sealing element is disposed in the connecting groove to seal the sound receiving channel of the microphone. This replaces traditional cushioning foam, reduces the process of pasting cushioning foam, and significantly improves assembly efficiency and production consistency. The base plate and the connecting groove are integrally formed, allowing for flexible design of the shape and size of the sealing element cross-section, ensuring stable sealing effect and better dustproof performance. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings introduced below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the projection device.

[0024] Figure 2 This is a schematic diagram of the base plate's appearance.

[0025] Figure 3 This is a cross-sectional schematic diagram of the decorative panel;

[0026] Figure 4 This is a schematic diagram of the assembly of the sealing foam.

[0027] Figure 5 A schematic diagram of the cross-sectional structure of the sealing foam for the radio reception channel;

[0028] Figure 6 A schematic cross-sectional view of the elastic seal used to seal the radio channel in an embodiment of this application;

[0029] Figure 7 A top view of the decorative panel provided in an embodiment of this application;

[0030] Figure 8 A schematic diagram of the cross-sectional structure of the elastic seal provided in the embodiments of this application;

[0031] Figure 9 This is a schematic diagram of the overall structure of the elastic seal provided in the embodiments of this application;

[0032] Figure 10 A bottom view of the decorative panel provided in an embodiment of this application;

[0033] Figure 11 A schematic diagram showing the location of the glue inlet provided in an embodiment of this application;

[0034] Figure 12 A front view structural diagram of the decorative panel provided in the embodiments of this application;

[0035] Figure 13 This is a schematic diagram illustrating the application scenario of the projection device provided in the embodiments of this application;

[0036] Figure 14 This is one of the structural schematic diagrams of the projection device provided in the embodiments of this application;

[0037] Figure 15This is a second schematic diagram of the projection device provided in the embodiments of this application. Detailed Implementation

[0038] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the application will be further described below in conjunction with the accompanying drawings and embodiments. However, the exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided to make the application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the figures denote the same or similar structures, and therefore repeated descriptions of them will be omitted. Terms describing position and direction described in this application are illustrative based on the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this application. The accompanying drawings of this application are for illustrating relative positional relationships only and do not represent actual scale.

[0039] As display products continue to grow in size, considering factors such as power consumption, weight, and size, the market for projection display products as a large-screen alternative to televisions is rapidly expanding.

[0040] Current small and medium-sized projector products have built-in far-field sound pickup capabilities. Figure 1 This is a schematic diagram of the projection device's appearance. For example... Figure 1 As shown, the projection device typically includes a housing 1, which includes a base plate 11 and a top cover 12.

[0041] Figure 2 This is a schematic diagram of the base plate's appearance. (Example:) Figure 2 As shown, the front end of the base plate 11 has an opening k, and a decorative panel 2 is provided at the position of the opening k. The decorative panel 2 serves a decorative purpose, and in order to ensure the assembly effect of the decorative panel 2, it is assembled from the inside to the outside of the base plate 11.

[0042] Figure 3 This is a cross-sectional schematic diagram of decorative panel 2. Figure 3 As shown, the decorative panel 2 may include a bottom surface 21 and side surfaces 22 that are interconnected. Multiple sound-receiving channels 221 communicating with the interior of the decorative panel are provided on the side surfaces of the decorative panel, as shown in the image. Figure 1 As shown.

[0043] The above-mentioned radio receiver 221 and microphone are configured accordingly, such as... Figure 4 and Figure 5 As shown, the microphone 31 is attached to the circuit board 3, the cushioning foam p is manually assembled onto the microphone's circuit board 3, and then the circuit board 3 is assembled with the decorative panel 2. The circuit board 3 and the decorative panel 2 are sealed together by the compression sealing property of the foam p.

[0044] In practical applications, multiple microphones are usually required. Figure 4 Four microphones were installed, each requiring manual attachment. This manual process introduces uncertainty and leads to poor product consistency. Furthermore, the sealing foam is die-cut, requiring a regular shape and preventing stepped cross-sections. The uniform thickness across the cross-section and the inability to adjust the sealing width further reduce sealing reliability.

[0045] In view of this, this application provides a projection device, which also includes: a housing 1, a decorative panel 2, and a circuit board 3. The cross-sectional shape of the decorative panel 2 is as follows: Figure 3 As shown, it includes a bottom surface 21 and a side surface 22. The side surface 22 of the decorative panel is provided with a sound receiving channel 221 that connects to the interior of the decorative panel.

[0046] like Figure 6 As shown, a circuit board 3 is also provided on the decorative panel 2, and a microphone 31 is provided on the circuit board 3. The microphone 31 is located at the position corresponding to the sound receiving channel 221.

[0047] In practice, the circuit board 3 can be a printed circuit board (PCB). The internal dimensions of the decorative panel 2 are related to the PCB. The PCB, the decorative panel 2 and the base plate 11 can be fixed together with screws.

[0048] like Figure 6 and Figure 7 As shown, the circuit board 3 is set with a hollow structure at the position corresponding to the microphone 31. The bottom surface 21 of the decorative panel is provided with a connecting groove 212 that surrounds the channel opening 211 of the sound receiving channel 221. An elastic sealing element m is provided in the connecting groove 211. The elastic sealing element m contacts the circuit board 3, thereby sealing the sound receiving channel 221 and ensuring the integrity of the sound receiving channel.

[0049] In this embodiment, the connecting groove 212 on the bottom surface of the decorative panel is integrally formed with the bottom surface 21. An elastic sealing element m is provided in the connecting groove 212 to seal the microphone's sound receiving channel 221. This replaces traditional cushioning foam, reduces the process of pasting cushioning foam, and significantly improves assembly efficiency and production consistency. The integral molding process of the bottom plate and the connecting groove allows for flexible design of the shape and size of the sealing element's cross-section, ensuring stable sealing effect and better dustproof performance.

[0050] The resilient seal can be manufactured using injection molding. After the decorative panel and the connecting groove are integrally molded, the connecting groove can serve as the mold for the resilient seal, thus eliminating the need for a separate mold. By designing the structure of the connecting groove, the shape of the resilient seal can be precisely adjusted.

[0051] like Figure 8 As shown, the elastic seal located in the connecting groove 212 includes a first part ma and a second part mb; wherein, the first part ma is located above the second part mb and the first part ma is in contact with the circuit board; the width of the first part ma is smaller than the width of the second part mb.

[0052] Therefore, the cross-sectional shape of the elastic seal can be set as a stepped structure, reducing the contact area between the elastic seal and the circuit board, and preventing the elastic seal from blocking the sound reception channel.

[0053] In specific implementation, such as Figure 8 As shown, the thickness h of the first part ma of the elastic seal can be 0.05mm to 0.2mm, for example, 0.15mm; the width of the first part ma can be 0.1mm to 0.3mm, for example, 0.2mm.

[0054] The thickness h of the first part of the elastic seal is set to 0.05mm to 0.2mm, giving it a certain amount of compression. After being fixed to the base plate with screws, the compression provides good sealing performance. The thickness of 0.05mm to 0.2mm and the width of 0.1mm to 0.3mm occupy a small volume, which can meet the acoustic sealing requirements, avoid interference with surrounding electronic components, and improve the structural compactness.

[0055] In some embodiments, such as Figure 7 As shown, a flow channel 213 is also provided on the bottom surface 21 of the decorative panel, and the flow channel 213 is connected to the connecting groove 212. The flow channel 213 includes a first extension 213a and a second extension 213b, which are arranged intersectingly; the first extension 213a connects the connecting groove 212 together.

[0056] The connecting groove 212, the flow channel 213, and the bottom surface 21 of the decorative panel are integrally injection molded structures, and the connecting groove 212 and the flow channel 213 are interconnected to form a mold for filling with sealing material. Figure 9 As shown, elastic seals are installed in both the flow channel and the connecting groove to distinguish different locations. Figure 9 The elastic seal located in the connecting groove is labeled as m1, and the elastic seal located in the flow channel is labeled as m2.

[0057] In traditional methods, decorative panels must be manufactured first, followed by manual attachment of cushioning foam and assembly, a cumbersome process reliant on manual labor. This embodiment employs a one-piece injection molding process, requiring only a single mold to complete the processing of the decorative panel and the integration of the elastic seal, eliminating multiple assembly steps, significantly improving production efficiency, and reducing labor costs and operational errors. Mold-based production also enables rapid batch molding, adapting to large-scale manufacturing needs. The large-area filling of elastic material in the connecting groove 212 and flow channel 213 also provides a sealing and dustproof function.

[0058] In this embodiment, the elastic sealant can be made of a translucent material with fluidity. After the decorative panel is made, the fluid sealant can be directly injected into the mold formed by the connecting groove 212 and the flow channel 213. The elastic sealant can be bonded to the decorative panel by a secondary injection molding process or a two-color injection molding process.

[0059] In practical implementation, the bottom surface of decorative panel 2 can be made of polymer or metal, and the elastic seal m can be made of liquid silicone. Liquid silicone has good adhesion to both polymer and metal materials. Taking decorative panel 2 as an example, a two-stage injection molding process can be used to bond liquid silicone rubber (LSR) and polymer plastic together through intermolecular bonding at high temperatures. Because the elastic seal is injection molded, the cross-sectional structure of the sealing area can be specially designed and customized.

[0060] The elastic seal made of liquid silicone can have a hardness of A30 to A40. A hardness of A30 to A40 provides moderate flexibility, allowing for easy compression and deformation during screw tightening to fully fill gaps and ensure the airtightness of the sound reception channel. Simultaneously, it has low rebound force, preventing seal failure after prolonged compression. Liquid silicone with a hardness of A30 to A40 also possesses high fluidity and shape retention, allowing for precise filling of complex molds.

[0061] like Figure 10 and Figure 11 As shown, the runner 213 has an inlet r at its distal end, allowing for injection of silicone onto the bottom surface 21 of the decorative panel. The gate marks of the liquid silicone remain on the outer side, ensuring a smooth contact surface with the circuit board. The liquid silicone has high fluidity, supporting injection from the distal end. The mold runner design guides it to fill evenly along a predetermined path, ensuring the integrity of the elastic sealing structure.

[0062] like Figure 9As shown, the second extension 213b of the flow channel 213 extends to the side of the decorative panel, exposing the end face g on the side 22. The entire flow channel 213 is filled with liquid silicone. The liquid silicone is translucent, thus forming a light-guiding channel within the flow channel. A light source is placed on the circuit board, and the light source emits light into the liquid silicone within the flow channel. The liquid silicone can guide the light towards the end face, such as... Figure 12 As shown, luminescent patterns can be formed on the end face, serving a decorative function. Therefore, the decorative panel provided in this embodiment not only has through holes for the sound-receiving channel on the decorative surface (side), but also has a luminescent decorative function, eliminating the need for additional luminescent component assembly steps, thereby reducing costs and enhancing the product's integration and aesthetics.

[0063] The projection principle and specific structure of the projection device will be explained in detail below.

[0064] Figure 13 This is a schematic diagram illustrating an application scenario of the projection device provided in an embodiment of this application. For example... Figure 13 As shown, the projection area of ​​the laser projection device 100 matches the display surface of the projection medium 200. The laser projection device 100 can connect to devices such as computers, cable TV networks, the Internet, Video Compact Disc (VCD), Digital Versatile Disc Recordable (DVD), game consoles, and DV cameras through different interfaces to receive projected content such as images, videos, and text, and project the content onto the projection medium 200 formed by physical objects such as walls, screens, and displays. Users can operate the laser projection device 100 through a mobile terminal 300 or a control device 400 to control the laser projection device 100. The laser projection device 100 can be the main unit of a laser TV, the projection medium 200 can be the screen of a laser TV, and the control device 400 can be a remote control. Communication between the remote control and the laser projection device 100 includes infrared protocol communication, Bluetooth protocol communication, wireless, or other wired methods to control the laser projection device 100. Users can input user commands through physical buttons on the remote control, voice input, control panel, etc., to control the laser projection device 100.

[0065] Figure 14 This is a schematic diagram of the projection device provided in an embodiment of this application. Figure 14 As shown, the projection device 100 includes: a display control component 111, a light source driving component 112, a projection light source 113, a display element 114, and a lens 115. The display control component 111 is connected to both the light source driving component 112 and the display element 114, and the light source driving component 112 is connected to the projection light source 113.

[0066] In some embodiments, such as Figure 15 As shown, the projection device 100 also includes at least one of the following: a controller 121, a tuner / demodulator 122, a communicator 123, an external device interface 124, an audio output interface 125, a memory 126, a power supply, and a user interface.

[0067] The controller 121 includes: a central processing unit (CPU), a video processor, an audio processor, a graphics processing unit (GPU), RAM (Random Access Memory), ROM (Read-Only Memory), and at least one of the following: a first to an nth interface for input / output, and a communication bus. The controller 121 controls the operation of the projection device and responds to user operations through various software control programs stored in the memory 126. The controller 121 controls the overall operation of the projection device.

[0068] The tuner / demodulator 122 receives broadcast television signals via wired or wireless means, and demodulates audio and video signals, such as EPG data signals, from multiple wireless or wired broadcast television signals.

[0069] The communicator 123 is a component used to communicate with external devices or servers according to various communication protocol types. For example, the communicator may include at least one of the following: a Wi-Fi module, a Bluetooth module, a wired Ethernet module, other network communication protocol chips or near-field communication protocol chips, and an infrared receiver.

[0070] The external device interface 124 may include, but is not limited to, one or more of the following: High Definition Multimedia Interface (HDMI), analog or high-definition component input interface (component), composite video input interface (CVBS), USB input interface (USB), RGB port, etc. It may also be a composite input / output interface formed by multiple interfaces mentioned above.

[0071] The audio output interface 125 is used to output audio information. The audio output interface 125 may include, but is not limited to, a microphone interface, a headphone interface, etc. This microphone interface can be connected to the circuit board 3. The microphone 31 picks up sound, and the audio data is transmitted through the microphone interface connected to the circuit board 3, thereby completing the work of sound pickup and audio processing.

[0072] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0073] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A projection device, comprising a housing, characterized in that, The outer casing includes a bottom plate and a top cover; the side wall of the bottom plate is provided with an opening; A decorative panel is provided at the opening position of the base plate; The decorative panel includes a bottom surface and a side surface that are connected to each other; the side surface of the decorative panel is provided with a sound receiving channel that communicates with the interior of the decorative panel; A circuit board is disposed on the bottom surface of the decorative panel; a microphone is disposed on the circuit board, and the microphone is disposed at a position corresponding to the sound receiving channel; The decorative panel has a connecting groove on its bottom surface that surrounds the opening of the radio channel, and the connecting groove is an integral structure with the bottom surface. An elastic sealing element is provided in the connecting groove, and the elastic sealing element contacts the circuit board to seal the radio channel.

2. The projection device as described in claim 1, characterized in that, The bottom surface of the decorative panel is also provided with a flow channel, which is connected to the connecting groove; the elastic sealing element is provided in the flow channel.

3. The projection device as described in claim 2, characterized in that, The connecting groove, the flow channel, and the bottom surface of the decorative panel are an integral injection-molded structure.

4. The projection device as described in claim 2, characterized in that, The flow channel includes a first extension and a second extension, which are arranged intersectingly. The first extension connects the communicating grooves together; the second extension extends to the side of the decorative panel.

5. The projection device as described in claim 4, characterized in that, The elastic seal is made of a light-transmitting material; The circuit board is also equipped with a light source, which emits light towards the elastic seal, and the elastic seal conducts the received light internally.

6. The projection device as described in any one of claims 1 to 5, characterized in that, The elastic seal is made of liquid silicone.

7. The projection device as described in claim 6, characterized in that, The hardness of the elastic seal is A30~A40.

8. The projection device as described in claim 6, characterized in that, The bottom surface of the decorative panel is made of polymer material or metal material.

9. The projection device as described in any one of claims 1 to 5, characterized in that, The elastic seal located in the communicating groove includes a first part and a second part; the first part is located above the second part and contacts the circuit board; the width of the first part is smaller than the width of the second part.

10. The projection device as described in claim 9, characterized in that, The thickness of the first part of the elastic seal is 0.05mm to 0.2mm; the width of the first part is 0.1mm to 0.3mm.

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