TWI665918B - Monitoring device - Google Patents

Abstract

The monitoring device includes a metal casing, an antenna, and a feed point. The metal case has an outer side. The antenna is disposed on the outer side and is electrically connected to the metal case. The feed point is placed on the antenna.

Description

Monitoring device

The present invention relates to a monitoring device, and more particularly to a wireless network monitoring device with an antenna.

In order to prevent the wireless signal from being affected by the case, almost all wireless network products in the Netcom industry use insulated plastic cases as the case. However, plastic casings have their inherent limitations, such as poor water resistance, inability to withstand external impacts, weak weather and environmental damage, and poor heat dissipation. Therefore, it is urgent to propose a new technology to improve the aforementioned problems.

Therefore, the present invention proposes a monitoring device that can improve the aforementioned conventional problems.

According to an embodiment of the present invention, a monitoring device is provided. The monitoring device includes a metal casing, a first antenna and a first feeding point. The metal casing has a first outer side. The first antenna is disposed on the first outer surface and is electrically connected to the metal case. The first feeding point is arranged on the first antenna.

In order to have a better understanding of the above and other aspects of the present invention, preferred embodiments are described below in detail with the accompanying drawings, as follows:

100‧‧‧ surveillance device

103‧‧‧Fixed parts

105‧‧‧metal case

105e1‧‧‧first end face

105e2‧‧‧Second end face

105s1‧‧‧first outer side

105s2‧‧‧Second Outer Side

110‧‧‧first antenna

110a, 130a ‧‧‧ perforation

111‧‧‧first ground

112‧‧‧First Radiation Department

113‧‧‧Second Radiation Department

114‧‧‧Third Radiation Department

115‧‧‧ the first feed point

120‧‧‧first feed line

125‧‧‧Circuit Board

130‧‧‧Second antenna

131‧‧‧Second Grounding Section

132, 133‧‧‧ Fourth Radiation Department

1321, 1331‧‧‧‧Fifth Radiation Department

1322, 1332 ‧‧‧ Sixth Radiation Department

1323, 1333‧‧‧ Seventh Radiation Department

135‧‧‧second feed point

140‧‧‧second feed line

145‧‧‧ camera lens

150‧‧‧ Infrared Emitter

155‧‧‧photometric sensor

160‧‧‧Object sensor

165‧‧‧end cap

165a1‧‧‧First opening

165a2‧‧‧Second opening

165a3‧‧‧Third opening

165a4‧‧‧ Fourth opening

170‧‧‧ Cover

175‧‧‧first seal ring

180‧‧‧Second sealing ring

185‧‧‧back cover

D1‧‧‧ first direction

D2‧‧‧ Second direction

D3‧‧‧ Third direction

D4‧‧‧ Fourth direction

FIG. 1A is an external view of a monitoring device according to an embodiment of the present invention.

Figures 1B and 1C show exploded views of the monitoring device of Figure 1A.

Figures 2A and 2B show the radiation pattern of the monitoring device of Figure 1.

FIG. 3 is a schematic diagram of the first antenna viewed from the first outer side of FIG. 1B.

FIG. 4 is a schematic diagram of the second antenna viewed from the second outer side of FIG. 1C.

Fig. 5 shows a sectional view of the monitoring device of Fig. 1A along the direction 5-5 '.

Please refer to FIGS. 1A, 1B, and 1C. FIG. 1A illustrates an external view of the monitoring device 100 according to an embodiment of the present invention, and FIGS. 1B and 1C illustrate an exploded view of the monitoring device 100 according to FIG. 1A.

The monitoring device 100 may be, for example, an IP monitor, a doorbell, or another type of monitor. The monitoring device 100 may be a fixed monitoring device, but may also be mounted on a traffic vehicle to move with the traffic vehicle. The monitoring device 100 can be installed in an outdoor environment or an indoor environment.

The monitoring device 100 includes a plurality of fixing members 103, a metal casing 105, a first antenna 110, a first feeding point 115, a first feeding line 120, a circuit board 125, a second antenna 130, a second feeding point 135, The second feed line 140, the camera lens 145, the two infrared light emitters 150, the photometric sensor (ALS) 155, the object sensor 160, the end cap 165, the protective cover 170, the first sealing ring 175, The second seal ring 180 and the rear cover 185.

A plurality of fixing members 103 pass through the rear cover 185 and the metal casing 105 and are fixed to the end cover 165, thereby fixing the relative positions of the metal casing 105, the rear cover 185 and the end cover 165. The fixing member 103 is, for example, an original member having a thread, such as a bolt. The cover 170 can be installed on the metal casing 105 and covers part of the metal casing 105, the first antenna 110, the first feeding point 115, the first feeding line 120, the second antenna 130, and the second feeding point 135 and the second feed line 140. The protective cover 170 is, for example, an insulating protective cover, which can avoid interference with or shield the transmitting and receiving signals of the first antenna 110 and the second antenna 130, and can reduce the external environment (such as sunlight, rain, impurities, etc.) to the first antenna 110 and Damage to the second antenna 130. In another embodiment, the monitoring device 100 may omit the cover 170.

The metal case 105 has a first outer side surface 105s1 and a second outer side surface 105s2 opposite to each other. The first antenna 110 and the second antenna 130 are respectively disposed on the first outer side surface 105s1 and the second outer side surface 105s2, and are exposed from the metal case 105. In this way, the transmitting and receiving signals of the first antenna 110 and the second antenna 130 can be prevented from being shielded by the metal casing 105. In addition, the first antenna 110 and the second antenna 130 can transmit and receive radio frequency signals (RF), Wi-Fi signals, or wireless signals using other communication protocols.

The first antenna 110 is electrically connected to the metal casing 105. The first feeding point 115 is disposed on the first antenna 110 and is electrically connected to the circuit board 125 through the first feeding line 120. The circuit board 125 is disposed in the metal casing 105. As shown in FIG. 1B, the first feed point 115 is located on the outer side of the first antenna 110, and the first feed line 120 extends from the first feed point 115 through the perforation 110a of the first antenna 110 to the metal The casing 105 is electrically connected to the circuit board 125. Since the metal casing 105 is electrically connected to the first antenna 110, and the entire metal casing 105 serves as a ground portion of the first antenna 110, the radiation field type of the monitoring device 100 tends to be omnidirectional. In detail, since the first antenna 110 is in contact with the outer surface of the metal casing 105 and the metal casing 105 is grounded, the metal casing 105 not only does not shield the transmitting and receiving signals of the first antenna 110, but allows the radiation of the monitoring device 100. The field type tends to be omnidirectional. In addition, the metal case 105 can be grounded through the circuit board 125 or grounded through a ground wire.

In addition, the second antenna 130 is electrically connected to the metal case 105. The second feeding point 135 is disposed on the second antenna 130 and is electrically connected to the circuit board 125 through the second feeding line 140. As shown in FIG. 1C, the second feeding point 135 is located on the outer side of the second antenna 130, and the second feeding line 140 extends from the second feeding point 135 through the through hole 130a of the second antenna 130 to the metal casing 105 Inside, and is electrically connected to the circuit board 125. Since the metal casing 105 is electrically connected to the second antenna 130, and the entire metal casing 105 serves as a ground portion of the second antenna 130, the field type of the monitoring device 100 can be more omnidirectional. In this embodiment, the geometric pattern of the first antenna 110 and the second antenna 130 are different, so the field patterns of the first antenna 110 and the second antenna 130 can be complementary to each other, so that the monitoring device A field pattern of 100 can be more omnidirectional. In another embodiment, the geometric pattern of the first antenna 110 and the geometric pattern of the second antenna 130 may be the same or similar.

Please refer to FIGS. 2A and 2B, which show the radiation pattern of the monitoring device 100 of FIG. As can be seen from the figure, since the entire metal casing 105 is used as the ground portion of the first antenna 110 and the second antenna 130, the field type E1 of the monitoring device 100 is determined. Really close to omnidirectional. In addition, the gains of the first antenna 110 and the second antenna 130 are approximately 3.15 dBi. In addition, due to the design of the first antenna 110 and the second antenna 130, the monitoring device 100 provides an operating frequency band of 2.4 GHz to 2.5 GHz.

In addition, the material of the metal case 105 includes aluminum, iron, or other conductive materials. Compared with the polymer material, the metal casing 105 is made of metal, and its strength and hardness are better, so it is more suitable for outdoor environments. In addition, the heat dissipation capability of the metal case 105 is also better than that of the insulating polymer material. In terms of manufacturing process, the metal shell 105 can be formed by extrusion, casting or processing. In addition, the first antenna 110 and the second antenna 130 may be fixed on the outer side of the metal casing 105 by screwing or welding. As shown in FIGS. 1B and 1C, the first outer side surface 105s1 and the second outer side surface 105s2 are opposite two side surfaces of the metal case 105, respectively. In another embodiment, the first outer surface 105s1 and the second outer surface 105s2 may be two adjacent sides of the metal casing 105. In addition, the number of antennas of the monitoring device 100 is not limited to two, but may be one or more than two, such as three or more.

As shown in FIG. 1B, the camera lens 145, the infrared light emitter 150, the photometric sensor 155, and the object sensor 160 may be disposed on the circuit board 125. The end cover 165 has a first opening 165a1, two second openings 165a2, a third opening 165a3, and a fourth opening 165a4. The camera lens 145, the infrared light emitter 150, the light sensor 155, and the object sensor 160 They are exposed from the first opening 165a1, the second opening 165a2, the third opening 165a3, and the fourth opening 165a4, respectively.

The camera lens 145 can capture the image in front, and the capturing method is, for example, photography or photography. The image captured by the camera lens 145 can pass through the first antenna 110 and The second antenna 130 is wirelessly transmitted to an external electronic device, such as a server, a display, or a mobile phone.

The infrared light emitter 150 can be used for night lighting. The photometric sensor 155 can detect ambient brightness. Although not shown in the figure, a controller (not shown) on the circuit board 125 can enable or disable the camera function of the camera lens 145 according to the signal of the object sensor 160. The controller may also control the infrared light emitting device 150 to emit infrared light according to the signal of the photometric sensor 155, so as to improve the clarity of the night camera. The object sensor 160 may sense that an external object approaches the monitoring device 100 or sense a movement of the external object. When the object sensor 160 detects that the object enters the monitoring range, the controller controls the camera lens 145 to start shooting. The object sensor 160 is, for example, a passive infrared sensor (Passive Infrared Sensor (PIR)), a microwave sensor (microwave sensor), or other types of sensors. The aforementioned object is, for example, a living body, such as a human or an animal, but it may also be a non-living body.

FIG. 3 is a schematic diagram of the first antenna 110 viewed from the first outer surface 105s1 of FIG. 1B. The first antenna 110 includes a first ground portion 111, a first radiation portion 112, a second radiation portion 113, and a third radiation portion 114. The first grounding portion 111 can be fixed to the first outer side surface 105s1 of the metal casing 105 through screws, and the first radiation portion 112 extends outward from the first grounding portion 111 in the first direction D1. The second radiation portion 113 extends from the first radiation portion 112 toward the second direction D2. The third radiating portion 114 extends from the second radiating portion 113 in the direction of the third direction D3 toward the first ground portion 111, but is not connected to the first ground portion 111, that is, is spaced apart from the first ground portion 111. The second radiating portion 113 protrudes beyond the third radiating portion 114 in the second direction D2. Second direction D2, the first direction D1 and the third direction D3 are substantially perpendicular, and the first direction D1 and the third direction D3 are two opposite directions. The aforementioned first feeding point 115 is located at the third radiating portion 114. Under the geometric design of the first antenna 110, the radiation field type of the monitoring device 100 is omnidirectional.

FIG. 4 is a schematic diagram of the second antenna 130 viewed from the second outer surface 105s2 of FIG. 1C. The second antenna 130 includes a second ground portion 131 and two fourth radiation portions 132 and 133. The second ground portion 131 can be fixed to the second outer surface 105s2 of the metal case 105 by screws, and the fourth radiation portions 132 and 133 The second ground portion 131 is connected to the second ground portion 131 and is disposed substantially symmetrically. The fourth radiating portion 132 includes a fifth radiating portion 1321, a sixth radiating portion 1322, and a seventh radiating portion 1323. The fifth radiating portion 1321 extends outward from the second grounding portion 131 in the first direction D1, and the sixth radiating portion 1322 extends from The fifth radiating portion 1321 extends in the second direction D2, and the seventh radiating portion 1323 extends from the sixth radiating portion 1322 in the third direction D3. Similarly, the fourth radiating portion 133 includes a fifth radiating portion 1331, a sixth radiating portion 1332, and a seventh radiating portion 1333. The fifth radiating portion 1331 extends outward from the second grounding portion 131 in the first direction D1, and the sixth radiating portion. The portion 1332 extends from the fifth radiating portion 1331 in the fourth direction D4, and the seventh radiating portion 1333 extends from the sixth radiating portion 1332 in the third direction D3. The second direction D2 and the fourth direction D4 are two opposite directions. In addition, the aforementioned second feeding point 135 is located on the fifth radiating portion of one of the two fourth radiating portions 132, such as the fifth radiating portion 1322 of the fourth radiating portion 132.

FIG. 5 is a cross-sectional view of the monitoring device 100 in FIG. 1A along the direction 5-5 '(the cover 170 is not shown). The metal case 105 has an opposite first end surface 105e1 and the second end surface 105e2. The end cap 165 is disposed on the first end surface 105e1. A part of the first antenna 110 and a part of the second antenna 130 protrude beyond the first end surface 105e1. For example, the radiating portions of the first antenna 110 (such as the first radiating portion 112, the second radiating portion 113, and the third radiating portion 114) and the radiating portions of the second antenna 130 (such as the fourth radiating portions 132 and 133) protrude. Exceeds the first end surface 105e1.

The first sealing ring 175 is located between the end cover 165 and the first end surface 105e1 to seal a gap between the end cover 165 and the first end surface 105e1 of the metal casing 105. In this way, it is possible to prevent external impurities from entering the inside of the monitoring device 100 through the gap, so the monitoring device 100 can be applied to outdoor environments. In addition, the end cap 165 is, for example, an insulating end cap, which can avoid affecting the transmitting and receiving signals of the first antenna 110 and the second antenna 130. Since the end cap 165 is an insulating end cap, the first antenna 110 and the second antenna 130 can be allowed to contact the end cap 165 during assembly. However, the embodiment of the present invention is not limited to this end cap 165 must be an insulating end cap. When the end cap 165 is a metal end cap, the end cap 165 is preferably spaced apart from the first antenna 110 and the second antenna 130 by, for example, more than 1 cm, so as to reduce the negative impact of the metal end cap on the antenna transmission and reception signals.

The rear cover 185 is disposed on the second end surface 105e2. The second sealing ring 180 is located between the rear cover 185 and the second end surface 105e2 to seal the gap between the rear cover 185 and the second end surface 105e2 of the metal casing 105. In this way, it is possible to prevent external impurities from entering the inside of the monitoring device 100 through the gap, so the monitoring device 100 can be applied to outdoor environments. In addition, the back cover 185 may be an insulating back cover or a metal back cover.

In summary, the monitoring device of the embodiment of the present invention includes a metal casing and at least one antenna, and the antenna is electrically connected to the metal casing. The metal shell is electrically connected to the connection The ground potential makes the metal shell the grounding part of the antenna, so that the radiation field type of the monitoring device tends to be omnidirectional. The omnidirectional coverage area is large, which can reduce the dead angle of receiving. Compared with the plastic case, because the monitoring device of the embodiment of the present invention adopts a metal case, it is more waterproof, has a higher ability to withstand external impact, has a stronger ability to withstand weather and environmental aggression, and has better heat dissipation capabilities. effect.

In summary, although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention pertains can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the attached patent application.

Claims (12)

A monitoring device includes: a metal shell having a first outer side; a first antenna disposed on the first outer side and electrically connected to the metal shell; the first antenna includes: a first A grounding portion is fixed to the first outer side of the metal casing; a first radiating portion extends outward from the first grounding portion in a first direction; a second radiating portion extends from the first radiating portion toward a first Extending in two directions; and a third radiating portion extending from the second radiating portion in a third direction; wherein the second radiating portion protrudes beyond the third radiating portion in the second direction, and the second direction and The first direction is substantially perpendicular, and the first direction is opposite to the third direction; and a first feeding point is disposed on the first antenna and located on the second radiating portion. The monitoring device according to item 1 of the patent application scope further includes: an object sensor disposed in the metal casing. The monitoring device according to item 1 of the scope of patent application, wherein the metal casing has an end surface, and the first antenna protrudes beyond the end surface. The monitoring device according to item 1 of the patent application scope, wherein the metal casing has an end surface, and the monitoring device further includes: an end cover disposed on the end surface of the metal casing; and a sealing ring between the end cover and the Between the end faces to seal the gap between the end cap and the metal shell. The monitoring device according to item 1 of the scope of patent application, wherein the end cap is an insulating end cap. The monitoring device according to item 1 of the scope of patent application, wherein the metal casing further has a second outer side, and the monitoring device further includes a second antenna disposed on the second outer side and electrically connected to the second outer side. The metal casing; and a second feeding point disposed on the second antenna. The monitoring device according to item 6 of the patent application, wherein the geometric pattern of the first antenna is different from the geometric pattern of the second antenna. The monitoring device according to item 6 of the scope of patent application, wherein the first outer surface and the second outer surface are opposite two outer surfaces of the metal casing, respectively. The monitoring device according to item 6 of the scope of patent application, wherein the first outer side surface and the second outer side surface are adjacent two side surfaces of the metal casing, respectively. The monitoring device according to item 6 of the scope of patent application, wherein the second antenna includes: a second ground portion fixed to the second outer side of the metal casing; and two fourth radiation portions connected to the The two ground portions are symmetrically arranged; wherein the second feeding point is located on one of the two fourth radiation portions. The monitoring device according to item 10 of the scope of patent application, wherein one of the second and fourth radiating sections includes: a fifth radiating section extending outward from the second grounding section in a first direction; a sixth radiating section Extending from the fifth radiating portion in a second direction; and a seventh radiating portion extending from the sixth radiating portion in a third direction; wherein the other of the two fourth radiating portions includes: a first Five radiating portions extending outward from the second ground portion in the first direction; a sixth radiating portion extending from the fifth radiating portion in a fourth direction; and a seventh radiating portion from the sixth radiating portion Extending along the third direction; wherein the second direction is substantially perpendicular to the first direction, the first direction is opposite to the third direction, the second direction is opposite to the fourth direction, and the The second feeding point is located on the fifth radiating portion of the one of the two fourth radiating portions. The monitoring device according to item 1 of the patent application range, wherein the first feeding point is located on an outer side of the first antenna, and the monitoring device further includes a first feeding line extending from the first feeding point Into the metal case.