TWM583063U - Web camera module with radar detection unit and web camera using web camera module - Google Patents

Abstract

The invention discloses a webcam module with a radar detecting unit and a webcam using the webcam module. The webcam module comprises a printed circuit board, a camera unit, a radar detecting unit, a wireless communication unit, a memory card slot, a fill light unit, a sound unit and a power management unit. Since the radar detecting unit is used instead of the traditional infrared sensor, the monitoring distance is long, the monitoring angle is large, the accuracy is high, and the identification function can be provided. In addition, the webcam using the webcam module can be triggered by radar wave sensing and does not have to be in operation forever to save power.

Description

Network camera module with radar detection unit and network camera using the network camera module

The present invention relates to a webcam module and a webcam using the webcam module, in particular to a webcam module having a radar detecting unit as a driving source and a network using the webcam module camera.

IP cameras generally include cameras, image compression modules, network communication modules, and microprocessors. Unlike a video camera (Webcam), which needs to connect to the Internet through a computer connection, since each network camera has its own IP address, it can be directly connected to the network as a network device, or indirectly connected via a hub. . This condition gives it the ability to communicate peer-to-peer. With the rapid development of the Internet of Things and the demand for safe living, the demand and application of network cameras are becoming wider and wider.

Webcams are generally not used for interpersonal video communication. Instead, they are used in a specific location to monitor and search images (and sometimes sounds) for a certain range of people, and then instantly The monitored and searched data is transmitted to the remote receiving end (such as the server), and even through the APP collaboration, presented on the third party's mobile communication device. Traditionally, the same work is done by the monitor. The monitor transmits images in a wired manner, and the pipes are coaxial cables. Since the coaxial cable is less susceptible to signal interference, reliability and reliability are high, and it has long been the terminal device of the monitoring system. However, the layout of the monitor should take into account the direction of the cable and the wire, that is, the position of the monitor should allow the installation of these lines, whether exposed or packaged in a specific pipeline. For the erector, this is undoubtedly a burden that cannot be avoided. If the problem on the wired road causes the monitor to be unable to operate effectively, the maintenance is very troublesome.

In addition, in the operation of the network camera, the constant image is often obtained for a long time, that is, the object or environment of the monitoring does not change, but at this time, it takes a lot of power to operate. Therefore, in order to save unnecessary power costs, recent network cameras have a sleep standby design. These webcams have added an independent background light source detector that allows the camera module of the webcam to go to sleep when it detects that there is no substantial change in the image, and when a detected source change is detected (starting factor) ) wake up the camera module when it appears. Commonly used background light detectors such as infrared sensors. One application scenario is that the network camera is used to monitor the entrance and exit of the door. When no guest enters the detection range, the camera module sleeps; when a guest appears, the infrared sensor detects that the light source within the detection range has changed, and drives the camera module. When the operation resumes, the webcam can even notify the monitor visitors to visit. The advantages of the infrared sensor are that it is inexpensive and easy to assemble; however, it has the disadvantages of a short monitoring distance, a small monitoring angle, a low accuracy, and the inability to provide various identification functions.

On the other hand, there are several problems with web cameras. First, like a normal monitor, the webcam is also powered by external power. Although the coaxial cable is removed, the installation of a power cord should also consider the power supply (where there is a power outlet) where the network monitor camera is located, and the degree of damage to the environment. For manufacturers, the same network surveillance camera may be replaced by different plugs and transformers because of sales in different countries or regions. The power cord can be called the number one natural enemy of network surveillance cameras.

Therefore, considering the above problems of the existing network surveillance camera products, the creator has accumulated decades of experience in the field of monitoring equipment, and proposed a network camera module with a radar detection unit as a driving source and uses the network. The camera module's webcam is designed to solve all problems at once. The details of the present invention are disclosed in detail in the following description.

In order to solve the aforementioned problems, the present invention proposes a network photography module. The webcam module comprises: a printed circuit board having a plurality of traces for supplying power or signal connections between components mounted thereon, wherein a first trace forms a receiving antenna, One of the second traces forms a transmitting antenna; a video recording unit, the video recording unit is mounted on the printed circuit board, and includes: a processor, the processor controls the operation of the electrical connection component thereof; An image sensor is electrically connected to the processor for recording an image and converting the image into an image signal for providing to the processor, wherein the camera unit is located at the receiving antenna and Between the transmitting antennas, the normal direction of the two antennas is substantially parallel to the video recording direction of the video recording unit; a radar detecting unit, the radar detecting unit is mounted on the printed circuit board, and is electrically connected to The processor and the signal of the camera unit are connected to the receiving antenna and the transmitting antenna for transmitting a specific frequency of electromagnetic waves through the transmitting antenna and receiving the external object through the receiving antenna. a reflected wave generated by the magnetic wave, and when a newly added reflected wave or a disappeared reflected wave of an object is detected, a trigger signal is sent to the processor to activate the camera unit; a wireless communication unit, the wireless The communication unit is electrically connected to the processor of the camera unit for transmitting the image signal from the processor to an external receiving device, and transmitting an instruction from the receiving device to the processor for processing; And a power management unit electrically connected to the camera unit, the radar detecting unit and the wireless communication unit, and providing a portion of the received power to the electrical connection component.

The network camera module can further include a memory card slot mounted on the printed circuit board and electrically connected to the processor for accessing one of the memory cards; a fill light unit mounted on the printed circuit board and electrically connected to the processor, activated when the camera unit is activated, for providing a light source required for operation of the camera unit; A radio unit is included, and the radio unit is electrically connected to the processor for recording the background sound of the surrounding environment.

According to the present invention, the camera unit may further include: a lens that focuses the light emitted by the partial light source in the direction of the recorded image, the image sensor is aligned with the focus of the lens; and a data buffer, the data The register is electrically connected to the processor to temporarily store the image signal from the image sensor.

Preferably, the lens can be a wide-angle lens, a fisheye lens or a retractable lens. The wireless communication unit can be a Wi-Fi transmission unit or a Bluetooth transmission unit. The electromagnetic wave emitted by the transmitting antenna can be a micrometer wave, and the direction of the emission is 9020 in the normal direction.

In addition, the present invention further provides a network camera, comprising: the foregoing network camera module; an AC to DC module, the AC to DC module is electrically connected to the power management unit, and converts the received AC power into DC power. And supplying the direct current to the power management unit; a power transfer unit comprising: an electrical connector capable of connecting an electrical output socket conforming to a mains output specification; and an internal power transmission end group, the internal power transmission The end group is electrically connected to the electrical connector and the AC to DC module for transmitting AC power from the electrical outlet to the AC to DC module; and a lower housing having two open ends Fixing the AC to DC module internally, fixing the network camera module to a first open end thereof, and fixing or movably connecting the electrical connector to a second open end; and an upper housing The first open end is detachably coupled to partially cover the webcam module, and has a plurality of openings for exposing some of the units in the webcam module.

According to the present invention, the upper casing is made of a non-metallic material. The electrical connector can be a screw base, a connector base, or a plug-in base. The electrical connector can include a two-hole plug, a three-hole plug, or a T-plug. The electrical connector can further include an extension cord coupled to the internal power transmission end set.

Since the radar detecting unit is used instead of the traditional infrared sensor, the monitoring distance is long, the monitoring angle is large, the accuracy is high, and the identification function can be provided. In addition, the webcam using the webcam module can be triggered by radar wave detection, and does not have to be kept in operation for a long time to save power, and has a convenient power take-off design.

The present invention will be further described with reference to the accompanying drawings and specific embodiments, which are intended to illustrate the present invention, but not to limit the invention.

Please refer to FIG. 1, which is a functional block diagram of a network camera module 10 in accordance with an embodiment of the present invention. The network camera module 10 includes a printed circuit board 100, a video recording unit 110, a radar detecting unit 120, a wireless communication unit 130, a memory card slot 140, a fill light unit 150, and a radio unit 160. And a power management unit 170. The function of each component and the way of connecting and interacting with other components are described in detail below.

The printed circuit board 100 has a plurality of traces which may be made of copper foil or gold foil. The function of printed circuit board 100 is to supply power or signal connections between components mounted thereon. One of the plurality of traces forms a receive antenna 101, and a second trace forms a transmit antenna 102. The position and function of the receiving antenna 101 and the transmitting antenna 102 will be described below.

The camera unit 110 is mounted on the printed circuit board 100 and includes a processor 111, an image sensor 113, a lens 114 and a data register 115. The processor 111 is a core device for controlling the operation of the electrical connection component, that is, operating the network camera module 10, and can be an integrated circuit. In this embodiment, the processor 111 is electrically connected to the image sensor 113, the data register 115, the radar detecting unit 120, the wireless communication unit 130, the memory card slot 140, the fill unit 150, and the power unit 160. The management unit 170, these components or secondary components are all controlled by the processor 111. The processor 111 can include or connect a necessary firmware (not shown), such as an EEPROM, for programming the code that controls the aforementioned or secondary components.

The image sensor 113 is electrically connected to the processor 111 for recording a video and converting the image into an image signal for being supplied to the processor 111. The processor 111 can recombine the image signal into a specific image file (such as a jpg file, an mp4 file, etc.) for use in a specific demand. The processor 111 can also output the image signal in a stream form. In this embodiment, the image sensor 113 is a CMOS image sensor; in other embodiments, the image sensor 113 can also be a CCD image sensor. Any device that can effectively convert optical images into optical signals is within the scope of the present invention.

For a better understanding of the function of the lens 114 and the configuration of the overall camera unit 110 in the network camera module 10, please refer to FIG. 2, which is a schematic cross-sectional view of the video recording unit 110 and the printed circuit board 100. . The function of the lens 114 is to focus the light emitted by a part of the light source in the direction F of the recording image, and the image sensor 113 aligns the focus of the lens 114. In this way, when the lens 114 adjusts its focus, the image sensor 113 can receive light of a specific range of images, thereby enabling recording of the image. In practice, the lens 114 can be a wide-angle lens, a fisheye lens or a retractable lens, which can be set according to different needs. It should be noted that the video recording unit 110 should be located between the receiving antenna 101 and the transmitting antenna 102, and the normal direction N of the receiving antenna 101 and the transmitting antenna 102 is substantially parallel to the video recording direction F of the video recording unit 110. . The design is such that the radar detecting unit 130 receives and emits electromagnetic waves through the receiving antenna 101 and the transmitting antenna 102, and can effectively cover the range in which the video capturing unit 110 receives images. Because the camera unit 110 is not in operation at all times but is triggered by the processor 111, the processor 111 must rely on the notification of the radar detecting unit 120 to activate the trigger, if the trigger source determined by the radar detecting unit 120 is not taken. The range in which the recording unit 110 is scheduled to perform the recording of the video does not cause the operation of the network camera module 10 to waste operating power.

In addition, the data register 115 of the camera unit 110 is electrically connected to the processor 111 to temporarily store the image signal from the image sensor 113. In this embodiment, the data register 115 is a random storage memory module; in other embodiments, the data register 115 can also be a flash memory module, or even a random storage memory. Module with flash memory.

The radar detecting unit 120 is mounted on the printed circuit board 100, and is electrically connected to the processor 111 of the camera unit 110 and the signal communication receiving antenna 101 and the transmitting antenna 102 for transmitting a specific frequency of electromagnetic waves through the transmitting antenna 102. And receiving the reflected wave generated by the electromagnetic wave from the external object through the receiving antenna 101. In this embodiment, in order to perform the image recording within the effective range of 10 meters and achieve the effect of the distance resolution of 0.8 m, the electromagnetic wave emitted by the transmitting antenna 102 is a micro wave, and the frequency thereof may be, for example, 24.15 GHz, the transmitting antenna. The direction of the electromagnetic wave of the 102 is about 9020 in the normal direction. When the radar detecting unit 120 detects the newly added reflected wave or the disappeared reflected wave of an object, a trigger signal is sent to the processor 111 to The camera unit 110 is activated. In this way, if the result of the video recording of the video recording unit 110 does not change, the processor 111 can instruct the video recording unit 110 to stop operating; once the new target or the original object disappears within the range of the recorded video, Indicates that the monitored field has changed. For example, if someone enters or is stolen, the processor 111 can trigger the signal to cause the video recording unit 110 to re-operate.

The wireless communication unit 130 is electrically connected to the processor 111 of the camera unit 110 for transmitting the image signal (or file) from the processor 111 to an external receiving device, and transmitting instructions from the receiving device to the receiving device. The processor 111 performs processing. The receiving device here can be a remote server or a smart phone under the cloud architecture, or can be a receiving control device in the peer-to-peer mode. Therefore, the wireless communication unit 130 can be a Wi-Fi transmission unit, and can communicate with the server or the smart phone through the AP sharer, or can be a Bluetooth transmission unit that directly connects the device that receives the control.

The memory card slot 140 is mounted on the printed circuit board 100 and electrically connected to the processor 111 for accessing one of the memory cards. Preferably, the memory card is a micro-SD memory card to make the overall size of the webcam module as small as possible. The fill light unit 150 is mounted on the printed circuit board 100 and electrically connected to the processor 111. The photo-recording unit 110 is activated to be activated, turned off, and turned off to provide a light source required for the operation of the video recording unit 110. In practice, the fill light unit 150 can be a light emitting diode. Preferably, the light emitting diode can have a specific spectrum, such as an infrared light emitting diode. The sound unit 160 is electrically connected to the processor 111, and can be used to record the background sound of the surrounding environment, and further allows the processor 111 to mix the synchronously received image signals to form an image signal or file having a background sound.

The power management unit 170 is electrically coupled to the camera unit 110 to provide a portion of the received power to its electrical connection elements. In this embodiment, the power management unit 170 is additionally electrically connected to the radar detecting unit 120, the wireless communication unit 130, the memory card slot 140, the fill light unit 150, and the sound pickup unit 160. That is to say, the power management unit 170 is an element that allows the network camera module 10 to operate, and may be formed by an integrated circuit or by some active and passive components and switches of the prior art. It.

It should be noted that although all of the above components are on the same printed circuit board 100, in accordance with the spirit of the present invention, when the network camera module 10 is to be installed in a network camera having a narrow internal space, in addition to the necessary components. For example, the video recording unit 110 and the radar detecting unit 120 must be disposed on the printed circuit board 100, and other components can be disposed on another independent printed circuit board, and the two printed circuit boards can be wired or wired. connection. Not limited to those shown in Figure 1.

This new form additionally proposes two kinds of network cameras using the aforementioned webcam module 10, which are separately described below.

Please refer to FIG. 3, which is an exploded view of a webcam 1 in accordance with another embodiment of the present invention. The network camera 1 includes a network camera module 10, an AC to DC module 11, a power adapter unit 12, a lower housing 13, and an upper housing 14. The AC to DC module 11 is electrically connected to the power management unit 170, converts the received AC power into DC power, and supplies the DC power to the power management unit 170. The AC to DC module 11 can receive a specific range of voltages, such as 110V to 240V, and output DC power that stabilizes the operating voltage and current. The power switching unit 12 includes an electrical connector 12a and an internal power transmitting terminal group 12b. The electrical connector 12a can be connected to an electrical outlet that conforms to the mains output specifications. In this embodiment, the electrical connector 12a is a spiral base. In application, the electrical connector 12a can also be a connector-type base or a plug-in base. The internal power transmission end group 12b is electrically connected to the electrical connector 12a and the AC to DC module 11 for transmitting AC power from the electrical outlet to the AC to DC module 11. In the present embodiment, the internal power transmission end group 12b is a metal connection seat fixed to the lower side of the lower casing 13 and rotatably coupled to the electrical connector 12a, and a connecting wire thereof. The lower housing has two open ends (a first open end for connecting a connection cable 11a on the internal power transmission end group 12b to the network camera module 10, and a second open end for allowing a partial internal power transmission end) The group 12b is exposed to fix the AC to DC module 11 internally, and further, the network camera module 10 can be fixed to the first open end thereof, and the electrical connector 12a can be fixedly connected to the second open end. The upper housing 14 is detachably coupled to the first open end to partially cover the webcam module 10, and has a main opening 14b for exposing the lens 14 in the webcam module 10 to focus the video image. The light emitted by the partial light source additionally has a plurality of auxiliary openings 14a, such as openings for inserting the memory card into the memory card slot 140 in this embodiment.

It should be noted that the metal has a shielding effect, which blocks the reflected electromagnetic wave to be received by the receiving antenna 101 or the electromagnetic wave emitted by the transmitting antenna 102, so the upper casing 14 should be made of a non-metallic material such as plastic, metal, wood, or the like. In addition, it can be seen from FIG. 3 that the overall appearance of the network camera 1 is a light bulb, and the type of the electrical connector 12a is a screw-type base, so that the lower casing 14 can be produced by using the mold at the bottom of the existing bulb, thereby reducing the cost; It can be installed on the spot using the lamp holder, which saves the trouble of setting up the power line.

Another implementation of the webcam in this case is shown in Figure 4. The network camera 2 includes a webcam module 10, an AC to DC module 21, a power adapter unit 22, a lower housing 23, an upper housing 24, and a trim cover 25. The AC to DC module 21 and the AC to DC module 22 have different appearances, but the functions of the two are the same, and are not described here. The AC to DC module 21 is connected to the network camera module 10 via a connection cable 21a.

The power switching unit 22 includes an electrical connector 22a and an internal power transmitting terminal group 22b. In the present embodiment, the electrical connector 22a is fixedly combined with a power transmission end group 22b instead of being detachable as in the previous embodiment. The electrical connector 22a can also be connected to an electrical output socket that conforms to the mains output specification. However, the electrical connector 22a in this embodiment is a plug type, such as a two-hole plug, a three-hole plug or a T-type plug, which can be directly plugged into a general commercial power socket. The function of the internal power transmission end group 22b is also as described in the previous embodiment, and is no longer rumored. The lower casing 23 also has two open ends, a first open end 23a and a second open end 23b. The lower casing 23 internally fixes the AC to DC module 21, fixes the network camera module 10 to its first open end 23a, and movably connects the electrical connector 22a to the second open end 23b. That is to say, the angle between the direction in which the electrical connector 22a is plugged into the commercial power socket and the direction of the recorded image can be adjusted according to the actual use condition, and the usable range of the network camera 2 is increased. The upper casing 24 is detachably coupled to the first open end 23a to partially cover the webcam module 10, and has a main opening 24b for exposing the lens 14 in the webcam module 10 to focus the video image. The light emitted by the upper portion of the light source additionally has a plurality of auxiliary openings 24a, such as the auxiliary opening 24a for exposing the control button 170 in the present embodiment, but the auxiliary opening 24a is also partially formed on the lower casing 23. This embodiment may additionally have a modified cover 24 as compared to the previous embodiment. As the name implies, the trim cover 24 is used to make the appearance of the webcam 2 look better, so it is also subject to the same restrictions as the upper casing 24: the material cannot be metal, and has an opening 25a for use in the webcam module 10. The lens 14 is exposed to focus the light emitted by a part of the light source in the direction of the recorded image.

The network camera 2 in this embodiment can also be modified as follows to make the operability of the network camera 2 even more. Please refer to Figure 5. FIG. 5 illustrates that the electrical connector 22a further includes an extension line 22c coupled to the internal power transmission end group 22b. In this way, the network camera 2 can obtain a farther source of power, making it more widely deployed.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. The scope of protection of this new type is subject to the definition of the scope of the patent application.

1‧‧‧Webcam  2‧‧‧Webcam  10‧‧‧Webcam module  11‧‧‧AC to DC module  11a‧‧‧Connecting cable  12‧‧‧Power adapter unit  12a‧‧‧Electrical connector  12b‧‧‧Internal power transmission end group  13‧‧‧ Lower case  14‧‧‧Upper casing  14a‧‧‧Auxiliary opening  14b‧‧‧Main opening  21‧‧‧AC to DC Module  21a‧‧‧Connecting cable  22‧‧‧Power adapter unit  22a‧‧‧Electrical connector  22b‧‧‧Internal power transmission end group  22c‧‧‧Extension line  23‧‧‧ Lower case  23a‧‧‧first open end  23b‧‧‧second open end  24‧‧‧Upper casing  24a‧‧‧Auxiliary opening  24b‧‧‧ main opening  25‧‧‧Modified cover  25a‧‧‧ openings  100‧‧‧Printed circuit board  101‧‧‧ receiving antenna  102‧‧‧transmit antenna  110‧‧‧Video unit  111‧‧‧ Processor  113‧‧‧Image Sensor  114‧‧‧ lens  115‧‧‧data register  120‧‧‧Radar detection unit  130‧‧‧Wireless communication unit  140‧‧‧Memory card slot  150‧‧‧ Filling unit  160‧‧‧ Radio unit  170‧‧‧Power Management Unit  180‧‧‧Control button  F‧‧‧Video recording direction  N‧‧‧The normal direction of the antenna  

In order to more clearly illustrate the technical solution of the present embodiment, a brief description of the drawings required in the embodiments will be briefly described below. 1 is a functional block diagram of a network camera module according to an embodiment of the present invention, FIG. 2 is a schematic cross-sectional view of a video recording unit and a printed circuit board, and FIG. 3 is a network according to another embodiment of the present invention. An exploded view of a road camera, FIG. 4 is an exploded view of a web camera according to still another embodiment of the present invention, and FIG. 5 is an external view of a web camera according to still another embodiment of the present invention.

Claims (14)

A webcam module comprising:
A printed circuit board having a plurality of traces for supplying power or signal connections between components mounted thereon, wherein a first trace forms a receive antenna and a second trace forms a launch antenna;
a camera unit, the camera unit is mounted on the printed circuit board and includes:
a processor that controls operation of the electrical connection component thereof, and an image sensor that is electrically coupled to the processor for recording an image and converting the image into an image electrical signal. Provided to the processor,
The camera unit is disposed between the receiving antenna and the transmitting antenna, and a normal direction of the two antennas is substantially parallel to a video recording direction of the camera unit;
a radar detecting unit, the radar detecting unit is mounted on the printed circuit board, and the processor and the signal electrically connected to the camera unit communicate with the receiving antenna and the transmitting antenna for transmitting a transmitting antenna through the transmitting antenna An electromagnetic wave of a specific frequency and a reflected wave generated by the receiving antenna to receive the electromagnetic wave from an external object, and when a newly added reflected wave or a disappeared reflected wave of an object is detected, a trigger signal is sent to the processor. To activate the camera unit;
a wireless communication unit electrically connected to the processor of the camera unit for transmitting the image signal from the processor to an external receiving device and transmitting an instruction from the receiving device And transmitting to the processor for processing; and a power management unit electrically connected to the camera unit, the radar detecting unit and the wireless communication unit, and providing a part of the received power to the power unit Connecting components. The network camera module of claim 1, further comprising a memory card slot mounted on the printed circuit board and electrically connected to the processor for accessing the plug One of the memory cards. The network camera module of claim 1, further comprising a fill light unit mounted on the printed circuit board and electrically connected to the processor, wherein the camera unit is activated Start up to provide the light source required for the operation of the camera unit. The network camera module of claim 1, further comprising a sound pickup unit electrically connected to the processor for recording a background sound of the surrounding environment. The webcam module of claim 1, wherein the camera unit further comprises:
a lens that focuses the light emitted by a portion of the light source in the direction of the recorded image, the image sensor is aligned with the focus of the lens; and a data register, the data register is electrically connected to the processor, and the temporary storage is from Image signal of the image sensor. The webcam module of claim 5, wherein the lens is a wide-angle lens, a fisheye lens or a retractable lens. The network camera module of claim 1, wherein the wireless communication unit is a Wi-Fi transmission unit or a Bluetooth transmission unit. The network camera module of claim 1, wherein the electromagnetic wave emitted by the transmitting antenna is a micrometer wave. The network camera module of claim 1, wherein the electromagnetic wave emitted by the transmitting antenna is 9020 in the normal direction thereof. A webcam that includes:
A webcam module as claimed in any one of claims 1 to 9;
An alternating current to direct current module, the alternating current to direct current module is electrically connected to the power management unit, converts the received alternating current into direct current, and supplies the direct current to the power management unit;
A power transfer unit comprising:
An electrical connector capable of connecting an electrical output seat conforming to a mains output specification; and an internal power transmission end group electrically connected to the electrical connector and the alternating current to direct current module for The alternating current of the electric outlet is transmitted to the alternating current to direct current module;
a lower housing, the lower housing has two open ends, the AC to DC module is fixed internally, the network camera module is fixed to a first open end thereof, and the electrical connector is fixedly or movably connected a second open end; and an upper casing detachably coupled to the first open end to partially cover the webcam module, having a plurality of openings for the middle of the webcam module The unit is exposed. The network camera of claim 10, wherein the upper casing is made of a non-metallic material. The network camera of claim 10, wherein the electrical connector is a screw cap, a connector cap, or a plug-in cap. The network camera of claim 10, wherein the electrical connector comprises a two-hole plug, a three-hole plug or a T-plug. The network camera of claim 13, wherein the electrical connector further comprises an extension cord connected to the internal power transmission end group.