Monitoring device for vehicle

Abstract

The utility model provides a monitoring device for a vehicle. The monitoring device comprises a circuit board assembly and a metal shell. The circuit board assembly comprises a first circuit board, a second circuit board, a light source, an image sensor and an energy oscillation element, the first circuit board and the second circuit board are arranged in parallel, and each of the light source, the image sensor and the energy oscillation element is arranged on the first circuit board or the second circuit board. The circuit board assembly is arranged in the metal shell, the first ground plane of the first circuit board and the second ground plane of the second circuit board are in lap joint with the metal shell to jointly form a shielding cavity, and the energy oscillation element is located in the shielding cavity. The vehicle monitoring device provided by the utility model can accord with the standard of electromagnetic compatibility.

Description

Technical Field

[0001] The utility model relates to a vehicle monitoring device, in particular to a vehicle monitoring device that can comply with electromagnetic compatibility specifications. Background Art

[0002] The circuit boards of currently available automotive monitoring devices have a large area to accommodate the light source, image sensor, and surrounding electronic components. However, this design increases the difficulty of shielding electromagnetic waves from the housing and is more likely to cause electromagnetic compatibility (EMC) issues. Therefore, how to reduce the intensity of leaked electromagnetic waves to overcome EMC issues is a topic of intense research in the field. Utility Model Content

[0003] The utility model provides a vehicle monitoring device which can comply with the specification of electromagnetic compatibility.

[0004] A vehicle monitoring device according to the present invention includes a circuit board assembly and a metal housing. The circuit board assembly includes a first circuit board, a second circuit board, a light source, an image sensor, and an energy oscillating element. The first circuit board and the second circuit board are arranged parallel to each other, and the light source, the image sensor, and the energy oscillating element are each disposed on the first circuit board or the second circuit board. The circuit board assembly is disposed within the metal housing. The first ground plane of the first circuit board and the second ground plane of the second circuit board are overlapped with the metal housing to form a shielding cavity. The energy oscillating element is located within the shielding cavity.

[0005] In an embodiment of the present invention, the image sensor is disposed on a first circuit board, and the light source is disposed on a second circuit board.

[0006] In one embodiment of the present invention, the above-mentioned first circuit board includes a first surface and a second surface relative to each other, the second circuit board includes a third surface and a fourth surface relative to each other, the third surface faces the second surface, the light source is arranged on the fourth surface, the image sensor is arranged on the second surface, and the energy oscillation element is arranged on the second surface or the third surface.

[0007] In one embodiment of the present invention, the vehicle monitoring device further includes a lens, wherein the second circuit board includes a hole, and the lens is disposed on the image sensor and passes through the hole to protrude from the fourth surface.

[0008] In an embodiment of the present invention, the aforementioned vehicle monitoring device further includes a connector disposed on the first surface.

[0009] In one embodiment of the present invention, the vehicle monitoring device further includes a first cover and a second cover, wherein the metal shell is a metal annular side shell having two opposite openings, and the first cover and the second cover are disposed at the two openings of the metal shell.

[0010] In one embodiment of the present invention, the vehicle monitoring device further includes a lens disposed on the image sensor, wherein the second cover is light-transmissive, and the light source and the lens face the second cover.

[0011] In one embodiment of the present invention, the above-mentioned vehicle monitoring device also includes a first cover body, wherein the metal shell includes a metal annular side shell and a metal cover connected to the metal annular side shell, the metal annular side shell includes an opening away from the metal cover, and the first cover body is arranged at the opening.

[0012] In one embodiment of the present invention, the vehicle monitoring device further includes a lens and a transparent film, wherein the lens is disposed on the image sensor, the metal cover includes a perforation, the transparent film covers the perforation, and the light source and the lens face the transparent film.

[0013] In one embodiment of the present invention, the vehicle monitoring device further includes a thermally conductive elastic member, wherein the metal cover includes an inner rib protruding toward the second circuit board, and the thermally conductive elastic member abuts against the second circuit board and the inner rib.

[0014] Based on the above, the circuit board assembly of the vehicle monitoring device of the present invention includes a first circuit board, a second circuit board, a light source, an image sensor, and an energy oscillating element. Because the image sensor and the energy oscillating element, which are prone to electromagnetic compatibility (EMC) issues, are disposed within a shielded cavity formed by the first ground plane of the first circuit board, the second ground plane of the second circuit board, and the metal shell, the electromagnetic waves generated by the image sensor and the energy oscillating element are confined within the shielded cavity. Consequently, the vehicle monitoring device of this embodiment can comply with electromagnetic compatibility regulations.

[0015] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below with reference to the accompanying drawings for detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of a vehicle monitoring device according to an embodiment of the present utility model;

[0017] Figure 2 yes Figure 1 A schematic diagram of the vehicle monitoring device from another perspective;

[0018] Figure 3 yes Figure 1 Exploded diagram of a vehicle monitoring device;

[0019] Figure 4 yes Figure 1 A cross-sectional view of the vehicle monitoring device along line AA;

[0020] Figure 5 yes Figure 1 A cross-sectional view of the vehicle monitoring device along line BB;

[0021] Figure 6 is a schematic diagram of a vehicle monitoring device according to another embodiment of the present utility model;

[0022] Figure 7 yes Figure 6 Exploded diagram of a vehicle monitoring device;

[0023] Figure 8 yes Figure 6 A cross-sectional view of the vehicle monitoring device along line CC.

[0024] Description of reference numerals:

[0025] 100, 100a: vehicle monitoring device;

[0026] 110: circuit board assembly;

[0027] 111: first circuit board;

[0028] 113: second circuit board;

[0029] 115: light source;

[0030] 117: image sensor;

[0031] 119: Energy oscillation element;

[0032] 120, 120a: metal shell;

[0033] 121: Metal annular side shell;

[0034] 123: Opening;

[0035] 125: metal cover;

[0036] 130: lens;

[0037] 140: connector;

[0038] 150: first cover;

[0039] 160: second cover;

[0040] 170: light-transmitting film;

[0041] 180: thermally conductive elastic member;

[0042] 1111: first ground plane;

[0043] 1113: first side;

[0044] 1115: second side;

[0045] 1131: second ground plane;

[0046] 1133: The third side;

[0047] 1135: fourth side;

[0048] 1137: hole;

[0049] 1251: perforation;

[0050] 1253: inner rib;

[0051] C: Shielded cavity. DETAILED DESCRIPTION

[0052] Figure 1 FIG. 1 is a schematic diagram of a vehicle monitoring device according to an embodiment of the present invention. Figure 2 yes Figure 1 Schematic diagram of the vehicle monitoring device from another perspective. Figure 1 and Figure 2 The vehicle monitoring device 100 of this embodiment is, for example, a vehicle driving behavior monitoring device, and the vehicle monitoring device 100 can monitor whether the driver closes his eyes or is tired during driving, but the present invention is not limited to this.

[0053] Figure 3 yes Figure 1 Exploded diagram of a vehicle monitoring device. Figure 4 yes Figure 1 A cross-sectional view of the vehicle monitoring device along line AA. Figure 5 yes Figure 1 Cross-sectional view of the vehicle monitoring device along line BB. Figures 3 to 5 The vehicle monitoring device 100 of this embodiment includes a circuit board assembly 110 and a metal shell 120. The circuit board assembly 110 includes a first circuit board 111, a second circuit board 113, a light source 115, an image sensor 117 ( Figure 4 ) and energy oscillation element 119. The first circuit board 111 and the second circuit board 113 are arranged in parallel, and the first circuit board 111 is as shown in FIG. Figure 4 As shown, the light source 115 is arranged below the second circuit board 113. The image sensor 117 is arranged Figure 4 As shown, the energy oscillation element 119 is arranged on the first circuit board 111. Figure 5 The circuit board assembly 110 is disposed on the first circuit board 111 or the second circuit board 113. The circuit board assembly 110 is disposed within the metal housing 120. The first ground plane 1111 of the first circuit board 111 and the second ground plane 1131 of the second circuit board 113 are fastened to the metal housing 120, for example, by screws. The first ground plane 1111, the second ground plane 1131, and the metal housing 120 collectively form a shielding cavity C. The image sensor 117 and the energy oscillating element 119 are disposed within the shielding cavity C.

[0054] It is worth noting that because the image sensor 117 and the energy oscillating element 119, which are prone to electromagnetic compatibility (EMC) issues, are located within the shielding cavity C formed by the first ground plane 1111, the second ground plane 1131, and the metal shell 120, the electromagnetic waves generated by the image sensor 117 and the energy oscillating element 119 are confined within the shielding cavity C. Consequently, the vehicle monitoring device 100 of this embodiment complies with electromagnetic compatibility regulations. Furthermore, because the light source 115 is disposed on the second circuit board 113 and the image sensor 117 is disposed on the first circuit board 111 below the second circuit board 113, the light emitted by the light source 115 is shielded by the second circuit board 113 and does not leak to the image sensor 117, thereby reducing the impact of the light source 115 on the image sensor 117. Furthermore, the presence of the light source 115 allows the vehicle monitoring device 100 of this embodiment to be used in nighttime environments. Furthermore, even if the driver is wearing sunglasses, the vehicle monitoring device 100 can still perform monitoring.

[0055] In this embodiment, the light source 115 is, for example, an LED infrared emitter, and the number thereof is, for example, two. Figure 4 As shown, they are symmetrically disposed on the left and right sides of the second circuit board 113, but the present invention does not limit the type, quantity, or location of the light sources 115. Furthermore, in this embodiment, the energy oscillating element 119 may be, for example, an oscillator, sequencer, image processor, power management element, etc., and may be two in number, disposed on the first circuit board 111 and the second circuit board 113, respectively. However, the present invention does not limit the type, quantity, or location of the energy oscillating element 119.

[0056] The structure of the vehicle monitoring device 100 will be described in detail below.

[0057] See also Figures 3 to 5 In this embodiment, the first circuit board 111 includes a first surface 1113 and a second surface 1115 that are opposite to each other. The second circuit board 113 includes a third surface 1133 and a fourth surface 1135 that are opposite to each other. The third surface 1133 faces the second surface 1115. The light source 115 is disposed on the fourth surface 1135, the image sensor 117 is disposed on the second surface 1115, and the energy oscillation element 119 is as shown in FIG. Figure 5 As shown, it is disposed on the second surface 1115 and the third surface 1133 .

[0058] See also Figure 4 and Figure 5 The vehicle monitoring device 100 further includes a lens 130. The second circuit board 113 includes a hole 1137. The lens 130 is disposed on the image sensor 117 and is as shown in FIG. Figure 4As shown, it passes through the hole 1137 and protrudes from the fourth surface 1135. The light generated by the light source 115 is emitted to the driver and reflected. The reflected light is transmitted to the image sensor 117 through the lens 130 to monitor the driver's status.

[0059] See also Figures 3 to 5 The vehicle monitoring device 100 further includes a first cover 150 and a second cover 160. The metal shell 120 is as shown in FIG. Figure 3 The metal annular side shell is shown, and has Figure 5 The first cover 150 and the second cover 160 are as shown. Figure 5 The two openings 123 are shown in the metal shell 120. The second cover 160 is light-transmissive, and the light source 115 and the lens 130 face the second cover 160. In this embodiment, the second cover 160 is, for example, translucent to allow infrared light to pass through, but the present invention is not limited thereto. In other embodiments, the second cover 160 can be made of any material that allows infrared light to pass through.

[0060] See also Figure 3 The vehicle monitoring device 100 further includes a connector 140 disposed on the first surface 1113 and passing through the first cover 150 , so that the connector 140 can be connected to the vehicle via a connecting line (not shown).

[0061] The following describes in detail the assembly steps of the vehicle monitoring device 100 .

[0062] See also Figure 3 When assembling the vehicle monitoring device 100, the assembler first passes the first circuit board 111 through the lower opening 123 and secures it to the metal shell 120 with screws. The assembler also passes the second circuit board 113 through the upper opening 123 and secures it to the metal shell 120 with screws. Next, the first cover 150 is aligned with the lower opening 123 and assembled to the metal shell 120. The second cover 160 is aligned with the upper opening 123 and assembled to the metal shell 120. In this embodiment, the second cover 160 is secured to the metal shell 120, for example, using snaps on the metal shell 120, and the first cover 150 is secured to the metal shell 120, for example, using screws. However, the securing method of the first and second covers 150 and 160 is not limited to this.

[0063] Figure 6 FIG2 is a schematic diagram of a vehicle monitoring device according to another embodiment of the present invention. Figure 7 yes Figure 6 Exploded diagram of a vehicle monitoring device. Figure 8 yes Figure 6 Cross-sectional view of the vehicle monitoring device along line CC. Figures 6 to 8The main difference between the vehicle monitoring device 100a of this embodiment and the vehicle monitoring device 100 of the aforementioned embodiment is that the vehicle monitoring device 100a of this embodiment includes a metal cover 125 and a light-transmitting film 170 but does not include a second cover body 160, and the vehicle monitoring device 100a of this embodiment also includes a thermally conductive elastic member 180.

[0064] Specifically, see Figure 8 The metal housing 120a of the vehicle monitoring device 100a of this embodiment includes a metal annular side housing 121 and a metal cover 125 connected to the metal annular side housing 121. The metal annular side housing 121 includes an opening 123 remote from the metal cover 125. The first cover 150 is disposed in the opening 123. The metal cover 125 includes a through-hole 1251. The through-hole 1251 is covered by a light-transmitting film 170. The light source 115 and the lens 130 face the light-transmitting film 170.

[0065] In this embodiment, the light-transmitting film 170 allows infrared light to pass through. That is, the light-transmitting film 170 can be made of any material that allows infrared light to pass through. The present invention does not impose any limitation on the material of the light-transmitting film 170 .

[0066] See also Figure 8 , the thermally conductive elastic member 180 is arranged around the light source 115. The metal cover 125 includes an inner rib 1253 protruding toward the second circuit board 113, and the thermally conductive elastic member 180 abuts against the second circuit board 113 and the inner rib 1253. Accordingly, the heat generated when the light source 115 emits light can be conducted to the inner rib 1253 through the thermally conductive elastic member 180, and then conducted to the metal shell 120a, so that the vehicle monitoring device 100a has a good heat dissipation effect. In this embodiment, the number of thermally conductive elastic members 180 is two, but not limited to this. In addition, arranging the light source 115, the image sensor 117, the energy oscillation element 119, etc. on the second circuit board 113 and the first circuit board 111 respectively also helps to dissipate heat.

[0067] The following describes in detail the assembly steps of the vehicle monitoring device 100 a.

[0068] See also Figure 7 and Figure 8When assembling the vehicle monitoring device 100a, the assembler first passes the second circuit board 113 through the opening 123 and secures it to the metal shell 120 using screws. Next, the first circuit board 111 is similarly passed through the aforementioned opening 123 and secured to the metal shell 120 and below the second circuit board 113 using screws. Next, the first cover 150 is aligned with the aforementioned opening 123 and assembled to the metal shell 120. Finally, the light-transmitting film 170 is applied from the other side of the metal shell 120 to cover the through-hole 1251. In this embodiment, the first cover 150 is secured to the metal shell 120 using screws, for example, but the securing method of the first cover 150 is not limited to this.

[0069] In summary, the circuit board assembly of the vehicle monitoring device of the present invention includes a first circuit board, a second circuit board, a light source, an image sensor, and an energy oscillation element. Since the image sensor and the energy oscillation element, which are prone to electromagnetic compatibility (EMC) problems, are arranged in a shielding cavity formed by the first ground plane of the first circuit board, the second ground plane of the second circuit board, and the metal shell, the electromagnetic waves generated by the image sensor and the energy oscillation element are confined within the shielding cavity. Accordingly, the vehicle monitoring device of this embodiment can comply with electromagnetic compatibility specifications. In addition, since the light source is arranged on the second circuit board, and the image sensor is arranged on the first circuit board below the second circuit board. Accordingly, the light emitted by the light source will not leak to the image sensor, thereby reducing the impact of the light source on the image sensor. In one embodiment, the vehicle monitoring device also includes a thermally conductive elastic member, which can conduct the heat generated when the light source emits light to the metal shell through the inner ribs of the metal cover, so that the vehicle monitoring device has a good heat dissipation effect.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vehicle monitoring device, characterized in that: include: A circuit board assembly comprising a first circuit board, a second circuit board, a light source, an image sensor, and an energy oscillation element, wherein the first circuit board and the second circuit board are arranged in parallel, and each of the light source, the image sensor, and the energy oscillation element is arranged on the first circuit board or the second circuit board; as well as A metal shell, the circuit board assembly is arranged in the metal shell, the first ground plane of the first circuit board and the second ground plane of the second circuit board are overlapped to the metal shell to form a shielding cavity together, and the energy oscillation element is located in the shielding cavity.

2. The vehicle monitoring device according to claim 1, characterized in that: The image sensor is disposed on the first circuit board, and the light source is disposed on the second circuit board.

3. The vehicle monitoring device according to claim 2, characterized in that: The first circuit board includes a first surface and a second surface relative to each other, the second circuit board includes a third surface and a fourth surface relative to each other, the third surface faces the second surface, the light source is arranged on the fourth surface, the image sensor is arranged on the second surface, and the energy oscillation element is arranged on the second surface or the third surface.

4. The vehicle monitoring device according to claim 3, characterized in that: The vehicle monitoring device further includes a lens, wherein the second circuit board includes a hole, and the lens is disposed on the image sensor and passes through the hole to protrude from the fourth surface.

5. The vehicle monitoring device according to claim 3, characterized in that: The vehicle monitoring device further includes a connector disposed on the first surface.

6. The vehicle monitoring device according to claim 1, characterized in that: The vehicle monitoring device further includes a first cover and a second cover, wherein the metal shell is a metal annular side shell having two opposite openings, and the first cover and the second cover are disposed at the two openings of the metal shell.

7. The vehicle monitoring device according to claim 6, characterized in that: The vehicle monitoring device further includes a lens disposed on the image sensor, wherein the second cover is light-transmissive, and the light source and the lens face the second cover.

8. The vehicle monitoring device according to claim 1, characterized in that: The vehicle monitoring device further includes a first cover, wherein the metal shell includes a metal annular side shell and a metal cover connected to the metal annular side shell, the metal annular side shell includes an opening away from the metal cover, and the first cover is disposed at the opening.

9. The vehicle monitoring device according to claim 8, characterized in that: The vehicle monitoring device further includes a lens and a light-transmitting film, wherein the lens is disposed on the image sensor, the metal cover includes a perforation, the light-transmitting film covers the perforation, and the light source and the lens face the light-transmitting film.

10. The vehicle monitoring device according to claim 8, characterized in that: The vehicle monitoring device further includes a heat-conducting elastic member, wherein the metal cover includes an inner rib protruding toward the second circuit board, and the heat-conducting elastic member abuts against the second circuit board and the inner rib.

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