A compact in-vehicle audio-visual device

Abstract

The present invention provides a compact in-vehicle audio-visual device, which relates to automotive accessories, including: a front shell and a rear shell, wherein the front shell and the rear shell form an accommodating cavity after being assembled; a display screen, which is arranged on the front end surface of the front shell and is glued to the front shell; a sheet metal part, which is arranged on the rear end surface of the front shell and is screwed to the front shell to overcome the warping of the front shell; a PCBA, which is arranged on the sheet metal part, and includes a power amplifier IC and a metal shrapnel, wherein the metal shrapnel is U-shaped and is arranged to fit the power amplifier IC to dissipate heat for the power amplifier IC; a heat sink, which is arranged on the PCBA and has a snap-fit position for the metal shrapnel to snap in. In the present application, by arranging the metal shrapnel on the PCBA to contact the power amplifier IC and conduct heat, the probability of a freeze is reduced. While conducting heat, the metal shrapnel can also guide the heat sink to be installed on the PCBA, thereby improving assembly efficiency.

Description

Technical Field

[0001] The present invention relates to automobile accessories, in particular to a compact vehicle-mounted audio-visual device. Background Art

[0002] In-vehicle audio and video equipment must undergo rigorous testing before installation, and the requirements for mechanical shock resistance, product rigidity (to prevent vibration and abnormal noise), electrical EMC, etc. are very strict, so the structural design requirements are very high.

[0003] Conventional all-in-one in-car audio and video systems design and install the display and host separately. This is primarily due to the limited space available in vehicles, leaving designers with limited space. Furthermore, the host generates heat, requiring through-holes in the heat dissipation structure to accommodate the amplifier IC. This results in fewer fins on the heat dissipation structure, significantly reducing heat dissipation effectiveness. Summary of the Invention

[0004] The present invention provides a compact vehicle-mounted audio-visual device, the purpose of which is to improve the integrity and heat dissipation efficiency.

[0005] In order to achieve the above objectives, an embodiment of the present invention provides a compact vehicle-mounted audio and video device, comprising:

[0006] A front housing and a rear housing, wherein the front housing and the rear housing form a receiving cavity after being assembled;

[0007] A display screen is provided on the front end surface of the front housing, and the display screen is glued to the front housing;

[0008] A sheet metal member is provided on the rear end surface of the front housing and is screwed to the front housing to overcome the warping of the front housing.

[0009] A PCBA is provided on the sheet metal component, the PCBA including a power amplifier IC and a metal shrapnel, the metal shrapnel is U-shaped, and the metal shrapnel is attached to the power amplifier IC to dissipate heat for the power amplifier IC;

[0010] The heat sink is arranged on the PCBA, and a locking position for a metal spring is provided on the heat sink.

[0011] Preferably, a honeycomb-shaped reinforcement rib is formed on the rear end surface of the front shell, and the reinforcement rib is arranged in a region close to the upper side of the front shell.

[0012] Preferably, a first nut column is provided on the rear end surface of the display screen, a second nut column is provided on the rear end surface of the front shell, and a third nut column is provided on the rear end surface of the sheet metal. The first nut column, the second nut column and the third nut column are positioned correspondingly and the first nut column is sleeved in the second nut column, the second nut column is sleeved in the third nut column, the PCBA is screwed to the first nut column by screws and the PCBA is press-fitted to the sheet metal.

[0013] Preferably, a guide column is formed on the rear end surface of the front housing, and guide holes for inserting the guide column are provided on the sheet metal part and the PCBA.

[0014] Preferably, the closed end of the metal dome is fitted with the PCBA, and the side surface of the metal dome is fitted with the power amplifier IC.

[0015] Preferably, the engaging position protrudes backward on the heat sink, and a first heat dissipation fin is provided on the protrusion.

[0016] Preferably, the heat sink is further provided with a plurality of second heat dissipation fins on one side of the engagement protrusion, and the plurality of second heat dissipation fins are arranged in parallel at intervals.

[0017] Preferably, the warping degree of the front shell is ≤0.3MM.

[0018] The above solution of the present invention has the following beneficial effects:

[0019] In this application, a metal shrapnel is provided on the PCBA to contact the power amplifier IC and conduct heat, thereby reducing the chance of a crash. While conducting heat, the metal shrapnel can also guide the heat sink to be installed on the PCBA, thereby improving assembly efficiency.

[0020] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an exploded view of the present invention;

[0022] Figure 2 is a rear view of the front housing;

[0023] Figure 3 This is the rear view of the PCBA;

[0024] Figure 4 This is the rear view of the heat sink.

[0025] [Description of Reference Numerals]

[0026] 1-Front housing, 2-Rear housing, 3-Display screen, 4-PCBA, 5-Heat sink, 6-Sheet metal, 41-Power amplifier IC, 42-Metal spring, 421-Spring tongue, 11-Reinforcement rib, 31-First nut column, 13-Guide column, 51-Snap-fit position, 52-First heat sink, 53-Second heat sink, 7-Conductive sponge. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, a detailed description will be given below with reference to the accompanying drawings and specific embodiments.

[0028] like Figure 1-4 As shown, an embodiment of the present invention provides a compact in-vehicle audio and video device comprising a front housing 1 and a rear housing 2. The front and rear housings 1 and 2, when fastened together, form a housing cavity for accommodating a sheet metal component 6, a PCBA 4, and a heat sink 5. A display screen 3 is also provided on the front end of the front housing 1. The display screen 3 is bonded to the front housing 1 using adhesive, ensuring a warpage of 0.3 mm or less. The bonded front housing 1 and display screen 3 exhibit good resistance to deformation.

[0029] Furthermore, reinforcing ribs 11 are provided on the rear end surface of the front shell 1 to increase the deformation resistance of the front shell 1. Preferably, the reinforcing ribs 11 are honeycomb-shaped and located near the upper side of the front shell 1. In this application, the use of honeycomb-shaped reinforcing ribs 11 not only provides excellent deformation resistance but also reduces the weight of the front shell 1. Compared with conventional rectangular reinforcing ribs 11, the front shell 1 is lighter and more resistant to deformation.

[0030] A sheet metal member 6 is also provided on the rear end face of the front housing 1. This member is screwed to the front housing 1 to prevent warping. A PCBA 4 is mounted on the sheet metal. The PCBA 4 includes an amplifier IC 41. Below this IC 41 is a U-shaped metal dome 42, which opens rearward. The side of the metal dome 42 contacts the lower end face of the IC 41, effectively dissipating heat from the IC 41. The metal dome 42 also serves as a guide for the installation of the heat sink 5, which will be explained later.

[0031] The aforementioned heat sink 5 is also provided on the PCBA 4. The aforementioned heat sink 5 has a locking position 51. The locking position 51 is locked with the metal spring 42 to play a role of preliminary fixation.

[0032] A first nut column 31 is formed on the rear end surface of the display screen 3, a second nut column is provided on the rear end surface of the front shell 1, and a third nut column is provided on the rear end surface of the sheet metal 6. The positions of the first nut column 31, the second nut column and the third nut column are consistent, and the first nut column 31 is sleeved in the second nut column, and the second nut column is sleeved in the third nut column. The PCBA4 is screwed to the first nut column 31 by screws, so that the PCBA4 can be pressed on the sheet metal 6.

[0033] In this application, the set of the first nut column 31, the second nut column and the third nut column and the fixing method of PCBA4 have better rigidity compared with the hinge of traditional technology. The three nut columns fasten the display screen 3, the front shell 1, the sheet metal 6 and the PCBA4 into a whole, which can easily pass the DV vibration test of the two parts on the vehicle.

[0034] A guide post 13 is provided on the rear end surface of the front housing 1, and guide holes are provided on the sheet metal 6 and the PCBA 4 for inserting the guide post 13. Preferably, a conductive sponge 7 is provided between the front housing 1 and the display screen 3, and the conductive sponge 7 contacts the front housing 1 and the display screen 3 respectively.

[0035] The display screen 3 and PCBA 4 are both live operations, and direct or indirect connection and conduction of electricity between the sheet metal part 6 and the display screen 3 or PCBA 4 can prevent the equipment from being live.

[0036] The aforementioned metal dome 42 is provided with a spring tongue 421, which is provided in the metal dome 42 and connected to the bottom wall of the metal dome 42. The spring tongue 421 contacts the bottom wall of the metal dome 42 and the opening formed by the spring tongue 421 and the metal dome 42 faces the closed end of the metal dome 42.

[0037] A locking portion 51 is provided on the heat sink 5 at a position corresponding to the metal spring 42. This portion 51 protrudes rearward from the heat sink 5 to form a space for accommodating the metal spring 42 and the power amplifier IC 41. A spring tongue 421 is provided on the locking portion 51 for engagement. Several first heat dissipating fins 52 are provided on the rear end surface of the raised portion 51. Second heat dissipating fins 53 are provided at other locations on the heat sink 5, arranged in parallel with intervals.

[0038] In the prior art, since the power amplifier IC 41 protrudes from the PCBA 4 , a via hole for the power amplifier IC 41 has to be cut out on the heat sink 5 , which results in a smaller spacing between the heat sink fins installed on the heat sink 5 , reducing the heat dissipation efficiency and often causing the device to crash.

[0039] In the present application, the metal spring 42 contacts the power amplifier IC 41, and the metal spring 42 plays a role in heat conduction, and the heat sink 5 is provided with a rearward protruding locking position 51, which increases the contact area between the heat sink 5 and the metal spring 42 and its own heat dissipation area, thereby reducing the chance of device crash.

[0040] Furthermore, the metal spring 42 is made of stainless steel and is preset on the PCBA4. When the heat sink 5 needs to be installed, the aforementioned guide column 13 is used for guidance, which makes it convenient for workers to install the heat sink 5 on the PCBA4 without damaging the electronic components of the PCBA4.

[0041] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A compact vehicle-mounted audio and video device, characterized in that: include: A front housing (1) and a rear housing (2), wherein the front housing (1) and the rear housing (2) form a receiving cavity after being assembled; A display screen (3) is provided on the front end surface of the front housing (1), and the display screen (3) is glued to the front housing (1); A sheet metal part (6) is provided on the rear end surface of the front housing (1) and is screwed to the front housing (1) to overcome the warping of the front housing (1). A PCBA (4) is arranged on the sheet metal part (6), the PCBA (4) comprising a power amplifier IC (41) and a metal shrapnel (42), the metal shrapnel (42) being U-shaped, and the metal shrapnel (42) being arranged in contact with the power amplifier IC (41) to dissipate heat for the power amplifier IC (41); A heat sink (5) is provided on the PCBA (4), and a snap-fit position (51) for a metal spring (42) to snap-fit is provided on the heat sink (5); A spring tongue (421) is provided in the metal spring piece (42), the spring tongue (421) is provided in the metal spring piece (42), and the spring tongue (421) is connected to the bottom wall of the metal spring piece (42), the spring tongue (421) contacts the bottom wall of the metal spring piece (42), and an opening formed by the spring tongue (421) and the metal spring piece (42) faces the closed end of the metal spring piece (42); The engaging position (51) protrudes backward on the heat sink (5) to form a space for accommodating the metal spring (42) and the power amplifier IC (41), and the engaging position (51) is provided with a contact position for the spring tongues (421) to engage with each other.

2. The compact vehicle-mounted audio and video device according to claim 1, characterized in that: A honeycomb-shaped reinforcement rib (11) is formed on the rear end surface of the front shell (1), and the reinforcement rib (11) is arranged in an area close to the upper side of the front shell (1).

3. The compact vehicle-mounted audio and video device according to claim 2, characterized in that: A first nut column (31) is provided on the rear end face of the display screen (3), a second nut column is provided on the rear end face of the front shell (1), and a third nut column is provided on the rear end face of the sheet metal component (6); the first nut column (31), the second nut column and the third nut column are positioned correspondingly, and the first nut column (31) is sleeved inside the second nut column, and the second nut column is sleeved inside the third nut column; the PCBA (4) is screwed to the first nut column (31) by screws and the PCBA (4) is press-fitted onto the sheet metal component (6).

4. The compact vehicle-mounted audio and video device according to claim 3, characterized in that: A guide column (13) is formed on the rear end surface of the front housing (1), and guide holes for inserting the guide column (13) are provided on the sheet metal component (6) and the PCBA (4).

5. The compact vehicle-mounted audio and video device according to claim 4, characterized in that: The closed end of the metal shrapnel (42) is arranged in contact with the PCBA (4), and the side surface of the metal shrapnel (42) is arranged in contact with the power amplifier IC (41).

6. The compact vehicle-mounted audio and video device according to claim 5, characterized in that: The engaging position (51) protrudes backward on the heat sink (5), and a first heat dissipation fin (52) is provided on the protrusion.

7. The compact vehicle-mounted audio and video device according to claim 6, characterized in that: The heat sink (5) is further provided with a plurality of second heat dissipation fins (53) on a raised side of the engaging position (51), and the plurality of second heat dissipation fins (53) are arranged in parallel at intervals.

8. The compact vehicle-mounted audio and video device according to claim 1, characterized in that: The warping degree of the front shell (1) is ≤0.3MM.

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