KR101976596B1 - BURIED TYPE IoT LIGHTING SWITCH DEVICE - Google Patents

Abstract

The present invention relates to a buried-type IoT lighting switch apparatus which has various electronic parts compactly placed for realizing an Internet of Things (IoT) technology, and is able to solve a power supply problem even without being connected to a central line or having a built-in battery. According to the present invention, the buried-type IoT lighting switch apparatus comprises: a case; a first substrate which has a controller mounted to perform a wireless communication with a user device; and a plurality of second substrates which include: a relay module to which a control signal of the user device is applied through the controller, and a power supply module which converts an external power supply into a rated power, and supplies the rated power to a lighting device. The inside of the case includes: a first space wherein the first substrate is placed; a second space wherein some of the plurality of second substrates are placed; and a third space wherein the rest of the plurality of second substrates are placed. The first space of the case, the second space of the case, and the third space of the case are successively placed from a front side towards a rear side. The internal area of the first space of the case is greater than the internal area of the second space of the case. The internal area of the second space of the case is greater than the internal area of the third space of the case.

Description

BURIED TYPE IO TIGHTING SWITCH DEVICE [0001]

BACKGROUND OF THE INVENTION Field of the Invention [0002] The present invention relates to a lighting switch device for monitoring and controlling a user through a user equipment to realize a smart home.

The Internet of Things (IoT) represents a technology that enables people to interact with information between things, objects and objects based on the Internet. A sensor and a communication module are embedded in various objects to be connected to the Internet. The Internet allows objects connected to the Internet to exchange information, analyze itself and provide the learned information to the user, or allow the user to remotely monitor and control objects through the Internet.

As this kind of Internet technology is developed, the construction of a smart home is becoming a reality. Smart Home is a home appliance that includes home appliances such as TVs, air conditioners, refrigerators, energy consumption devices such as water, electricity, lighting, and heating and cooling, door locks, and CCTV security devices. Monitoring, and control the system. In particular, smart home construction is the fastest realizing area of lighting and heating and cooling.

On the other hand, in the field of lighting, products having names and shapes such as a lighting device itself, a smart lighting switch or a smart lighting socket are becoming popular. However, in order to realize the object Internet technology, various electronic parts (substrate, communication module, control module, relay module, power supply module, etc.) are built in the products. In general, the general IoT lighting switch device has various electronic components There is a problem that the size of the product increases.

On the other hand, the smart lighting switch device must be always supplied with power regardless of the on / off state of the lighting device for smooth remote monitoring and control. Accordingly, the conventional smart lighting switch device solves power problems by directly connecting the neutral wire to the power supply, or by installing a large capacity battery or replacing the battery.

However, there is a disadvantage that a separate wiring work is required since most of the neutral wires for connecting with the switch device are not prepared in advance, and the built-in battery or the battery replacement method increases the weight and volume of the switch device, There is a problem that it becomes an obstacle to the user.

Korean Registered Patent No. 10-1846518, Apr. 20, 2014. Announcement

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lighting switch device capable of solving a power supply problem even if various electronic components for implementing a thing Internet technology are compactly arranged and not connected to a medium line or a built-in battery.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems which are not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a lighting switch device including: a case; A first board on which a controller for wireless communication with a user equipment is mounted; And a plurality of second boards mounted on a relay module to which a control signal of the user equipment is applied through the controller and a power supply module for converting an external power supply to a rating and supplying the rated power to the lighting equipment, Wherein a first space in which the first substrate is disposed and a second space in which a part of the plurality of second substrates are arranged and a third space in which the remaining of the plurality of second substrates are arranged are formed, 1 space, the second space of the case and the third space of the case are sequentially arranged from front to back, the internal area of the first space of the case is larger than the internal area of the second space of the case, The internal area of the second space of the case may be wider than the internal area of the third space of the case.

The length of the second space of the case may be longer than the length of the third space of the case, and the length of the third space of the case may be longer than the length of the first space of the case.

Wherein the case includes a front case and a rear case, wherein the front case includes a main body and a side plate protruding rearward from an edge of the main body of the front case, A first depression that is recessed rearward from the body of the rear case, and a second depression that is recessed backward from the first depression.

Wherein the first space of the case is formed such that the main body of the front case and the main body of the rear case are opposed to each other and the side plate of the front case and the side plate of the rear case are overlapped with each other, And the third space of the case may be formed inside the second depression of the rear case.

The light switch device may further include a button that is exposed forward in the main body of the front case and applies a control signal to the relay module by manual operation of the user.

The relay module controls the relay to be turned on and off. In the turn-on state of the relay, the external power is supplied to the lighting device, and the external power is prevented from being supplied to the lighting device in the turn-off state of the relay.

The lighting switch device may further include a capacitor which is disposed in a third space of the case and is located behind the third substrate and charges the remaining power of the lighting apparatus and supplies the remaining power to the controller.

The controller may include a communication module and an antenna, the antenna may be positioned at a front edge of the first substrate, and a groove-shaped pocket for receiving the antenna may be formed in the front case.

One of the plurality of second substrates may be disposed in a second space of the case, and the remaining one of the plurality of second substrates may be disposed in a third space of the case.

The relay module may be mounted on the rear side of the second substrate and positioned at a lower end of the second space of the case.

In the present invention, the first substrate (performing a communication function with the user device), the plurality of second substrates (performing ON / OFF control of the illuminating device, and supplying the illuminating device with rated external power) So that the size of the product can be reduced.

Further, the present invention provides a switch device capable of smoothly performing remote control of illumination without being directly connected to a neutral wire or without incorporating a large-capacity battery, because residual power of a lighting device is charged in a capacitor and supplied to a controller.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description.

1 is a conceptual diagram schematically showing an example of an application environment of the switch device of the present invention.
2 and 3 are perspective views of the switch device of the present invention viewed from different angles.
4 is a cross-sectional view of the switch device of the present invention taken along line aa '.
5 is a cross-sectional view of the switch device of the present invention taken along the line bb '.
6 is an exploded perspective view showing the switch device of the present invention.
FIGS. 7 and 8 are perspective views of a button, a first substrate, a second substrate, and a capacitor of the present invention viewed from different angles.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, Is provided to fully convey the scope of the present invention to a technician, and the present invention is only defined by the scope of the claims.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms " comprises " and / or " comprising " used in the specification do not exclude the presence or addition of one or more other elements in addition to the stated element. Like reference numerals refer to like elements throughout the specification and " and / or " include each and every combination of one or more of the elements mentioned. Although " first ", " second " and the like are used to describe various components, it is needless to say that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical scope of the present invention.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense that is commonly understood by one of ordinary skill in the art to which this invention belongs. In addition, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

The terms spatially relative, "below", "beneath", "lower", "above" and "upper" And can be used to easily describe a correlation between an element and other elements. Spatially relative terms should be understood in terms of the directions shown in the drawings, including the different directions of components at the time of use or operation. For example, when inverting an element shown in the figures, an element described as "below" or "beneath" of another element may be placed "above" another element . Thus, the exemplary term " below " can include both downward and upward directions. The components can also be oriented in different directions, so that spatially relative terms can be interpreted according to orientation.

Hereinafter, the left side can be defined as the positive direction of the x-axis shown in Fig. 2, and the right side can be defined as the negative direction of the x-axis shown in Fig. Further, the rear side can be defined as the positive direction of the y-axis shown in Fig. 2, and the front side can be defined as the negative direction of the y-axis shown in Fig. The upper side can be defined as the positive direction of the z-axis shown in Fig. 2, and the lower side can be defined as the negative direction of the z-axis shown in Fig. That is, the z axis may be a vertical axis.

Hereinafter, " active line (1) " may refer to a line through which an external power source flows, and " neutral line (2) " In this case, " active line 1 " may also be referred to as " heart line ". On the other hand, " external power source " indicates a normal power source supplied from " active line 1 ", and can be used for distinguishing from " residual power source ". The " residual power source " may mean a power source remaining in the lighting apparatus 20 when the lighting apparatus 20 is turned off.

Hereinafter, the operation mode of the illumination switch device 1000 of the present invention may include an " active mode " and an " inactive mode ". In this case, the " active mode " may be a concept as opposed to the " inactive mode ". The " non-active mode " may be a low power mode or a power saving mode, for example, a state in which the communication module is inactivated to perform a minimized function or operation (e.g., receiving a wake-up signal).

The operation mode of the lighting switch device 1000 of the present invention can be switched by remote control by the user device 10 or manual operation of the button 500. [ Further, the operation mode of the lighting switch device 1000 of the present invention may be automatically switched. For example, the illumination switch device 1000 of the present invention can be switched from the inactive mode to the active mode by being supplied with the wake-up signal by manual operation of the user device 10 or the button 700, If there is no operation for a period of time, it can be automatically switched from active mode to inactive mode.

Hereinafter, the lighting switch device 1000 of the present invention will be described with reference to the drawings. FIG. 1 is a conceptual diagram schematically showing an example of an application environment of a switch device according to the present invention. FIG. 2 and FIG. 3 are perspective views of the switch device of the present invention viewed from different angles, Sectional view taken along line bb 'of the switch device of the present invention, Fig. 6 is an exploded perspective view showing the switch device of the present invention, and Figs. 7 8 is a perspective view of the button, the first substrate, the second substrate, and the capacitor of the present invention viewed from different angles.

The lighting switch device 1000 of the present invention can be provided in the form of a switch that is exposed to the outside or embedded in a wall of a building or an internal configuration of the switch box. The lighting device 20 is connected to the active line 1 and the other terminal is connected to the neutral line 2 to receive external power. As shown in FIG.

Therefore, in order to install the lighting switch device 1000 of the present invention, it is not necessary to electrically connect the lighting switch device 1000 of the present invention to the neutral line 2, and as a result, the lighting switch device 1000 of the present invention It can be installed even when a separate neutral line 2 is not provided.

The lighting switch device 1000 of the present invention can wirelessly communicate with an external user device 10 by means of the Internet technology to control and monitor the lighting device 20.

In this case, " user equipment " may include, but is not limited to, one or more of a telecommunication device such as a smart phone, tablet, PDA,

In addition, one or more communication methods such as Wi-FI, Li-Fi, Bluetooth, UWB (Ultra Wide Band), Zigbee and Z-wave may be used as the wireless communication method. However, the present invention is not limited thereto, and various other short-range wireless communication methods and long-range wireless communication methods may be used as the wireless communication method of the present invention.

The lighting device 20 is controlled by the user device 10 remotely (for example, on / off control of the lighting device) and monitored (for example, the mode of the user device via the application, . ≪ / RTI >

The lighting switch device 1000 of the present invention may include a case 100, a first substrate 200, a plurality of second substrates 300, a capacitor 400, and a button 500. In this case, a " controller " can be mounted on the first substrate 200, and a " relay module 311 " and a " power supply module "

The case 100 may be a member that forms the appearance of the lighting switch device 1000. The material of the case 100 may include a synthetic resin material (e.g., plastic), and the case 100 may be manufactured by injection molding of a synthetic resin.

A first substrate 200, a plurality of second substrates 300 and a capacitor 400 may be disposed inside the case 100. For this purpose, a receiving space may be provided inside the case 100 .

The case 100 may include a front case 110 and a rear case 120. The front case 110 may form a front portion of the case 100 in a larger scale and the rear case 120 may form a rear portion of the case 100 roughly.

The front case 110 may include a main body 111 and a side plate 112 protruding rearward from an edge of the main body 111 of the front case 110.

The main body 111 of the front case 110 may be in the form of a square plate having a front surface and a rear surface at a substantially flat surface. The main body 111 of the front case 110 may have a hole 111-1 for exposing the button 700 to the outside. In this case, the number of the holes 111-1 of the front case 110 may be one or more and may correspond to the number of the buttons 500 one to one.

The side plate 112 of the front case 110 may be formed to protrude rearward from each of the four sides of the main body 111 of the front case 110. [ That is, the side plate 112 of the front case 110 may include an upper side plate, a lower side plate, a right side plate, and a left side plate, and the edge that each side plate contacts may be rounded.

The rear case 120 includes a main body 121, a side plate 122 protruding forward from an edge of the main body 121 of the rear case 120, and a side plate 122 protruding rearward from the main body 121 of the rear case 120 A first depression 123 and a second depression 124 that is recessed backward from the first depression 123 of the rear case 120. [

The main body 121 of the rear case 120 may be in the form of a square plate having a front surface and a rear surface at a major surface.

The side plate 122 of the rear case 120 may be formed by projecting forward from each of the four sides of the main body 121 of the rear case 120. That is, the side plate 122 of the rear case 120 may include an upper side plate, a lower side plate, a right side plate, and a left side plate, and the edge where each side plate contacts can be rounded.

The side plate 112 of the front case 110 and the side plate 122 of the rear case 120 can overlap each other. In this case, the side plate 112 of the front case 110 can be disposed on the outer side to cover the outer side surface of the side plate 122 of the rear case 120.

The first depressed portion 123 of the rear case 120 may be formed such that the central portion of the main body 121 of the rear case 120 is recessed rearward. The first depression (123) of the rear case (120) may be in the form of a hollow rectangular parallelepiped having a generally open front face.

The second indented portion 124 of the rear case 120 may be recessed rearward from the upper end of the first indented portion 123 of the rear case 120 to the lower portion. The second depression 124 of the rear case 120 may be in the form of a rectangular parallelepiped having a generally open front face. The upper surface of the second depression 124 of the rear case 120 may be formed on the same plane as the upper surface of the first depression 123 of the rear case 120. [

A first space s1 in which the first substrate 200 is disposed and a second space s2 in which a part of the plurality of second substrates 300 are disposed; A third space s3 in which the remainder of the first space 300 is disposed may be formed.

One of the plurality of second substrates 300 may be disposed in the second space s2 of the case 100 and a plurality of second substrates 300 300 may be disposed in the third space s3 of the case 100. [ In this case, one of the plurality of second substrates 300 may be referred to as a second-first substrate 310, and the other one of the plurality of second substrates 300 may be referred to as a second- .

The first space s1 of the case 100 and the second space s2 of the case 100 and the third space s3 of the case 100 can be sequentially arranged from the front to the rear, So that one space can be formed.

The relay module 311 may be disposed in the second space s2 of the case 100 together with the second-first substrate 310 and the second space s3 may be disposed in the third space s3 of the case 100. [ The capacitor 400 may be disposed together with the capacitor 320. In this case, the relay module 311 may be mounted on the 2-1 substrate 310 and be positioned below the 2-1 substrate 310, and the capacitor 400 may be mounted on the 2-2 substrate 320 And can be positioned at the rear.

The first space s1 of the case 100 is set such that the main body 111 of the front case 110 and the main body 121 of the rear case 120 are opposed to each other and the side plate 112 of the front case 110 and the rear side The side plates 122 of the case 120 may be formed to overlap each other.

The second space s2 of the case 100 may be formed inside the first depression 123 of the rear case 120 and the third space s3 of the case 100 may be formed inside the rear case 120. [ The second depressed portion 124 may be formed of a metal.

On the other hand, the "internal area" of the space of the case 100 can be defined as the maximum value of the plane perpendicular to the y-axis, and the "total length" of the space of the case 100 is the maximum value .

The internal area of the first space s1 of the case 100 is wider than the internal area of the second space s2 of the case 100 and the internal area of the second space s2 of the case 100 is larger than the internal area of the case 100 The third space s3 of the second space s3.

This is because the lighting switch device 1000 of the present invention preferably has a built-in area reduced from the front to the back so as to have a structure to be embedded in the wall. Further, since the first substrate 200 on which the communication module is mounted is formed with a relatively complicated integrated circuit as compared with the plurality of second substrates 300 and the button 500 for manual operation of the user is disposed, And the button 500 can be arranged.

The total length of the second space s2 of the case 100 is longer than the total length of the third space s3 of the case 100 and the total length of the third space s3 of the case 100 is longer than the length of the case 100 (S1) of the first space (s1).

In the second space s2 of the case 100, it is necessary to secure a sufficient length to accommodate various electronic components to be mounted between the plurality of second boards 300, and to accommodate the bulky relay module 311 It is necessary to secure a sufficient length of the electric field.

This is because, in the third space s3 of the case 100, a sufficient total length is required to accommodate the capacitor 500 having a large size for charging capacity (for example, a super capacitor).

The first substrate 200 may be present in a single number. A controller (not shown), an antenna 210, and a lamp 220 may be mounted on the first substrate 200, and a button 500 may be disposed.

The controller may include a communication module. The communication module may be a communication integrated circuit for wirelessly communicating with the user equipment 10 and for applying the control signal of the user equipment 10 to the relay module 311 of the second- The lighting switch device 1000 of the present invention can operate in an active mode and an inactive mode depending on the active state of the communication module.

The antenna 210 may be an electronic component that amplifies a signal for communication between the communication module and the user equipment 10. [ The antenna 210 may be positioned at the front edge of the first substrate 200. The antenna 210 may be positioned at the upper end of the right side of the first substrate 200. In this case, a groove-shaped pocket portion (not shown) for receiving the antenna 210 may be provided in the front case 110 of the case 100. Since the antenna 210 is located on the outer side adjacent to the front case 110, wireless communication with the user device 10 can be performed more smoothly.

The lamp 220 may be an LED (Light Emitting Diode). The lamp 220 may be located at the edge of the front side of the first substrate 200. The lamp 200 may be positioned at the lower end of the left side of the first substrate 200. The operating mode of the lighting switch device 1000 can be identified to the user through the wavelength band of the light emitted from the lamp 220, the on / off state of the lamp 220, the blinking period of the lamp 220,

On the other hand, electronic components such as a regulator, an AC-DC converter, and one or more switches and diodes may be mounted on the first substrate 200. In order to accommodate the regulator of the first substrate 200, the AC-DC converter, one or more switches and diodes, etc. in the second space s2 of the case 100 having a sufficiently long electrical length, (Not shown).

The first substrate 200 and the second-1 substrate 310 may be electrically connected by one or more first connectors 211. Accordingly, the first substrate 200 and the second-1 substrate 310 can transmit and receive power and signals from each other.

Meanwhile, in accordance with a design request for compactly arranging various electronic components utilizing a space, a mounting component of the first substrate 200 may be mounted on the second-first substrate 310, The mounting parts of the first substrate 310 may be mounted on the first substrate 200. [

The second substrate 300 may exist in plural. The plurality of second substrates 300 may be spaced apart from each other in the front-rear direction and stacked. On the other hand, the number of the second substrate 300 may be two. The two second substrates 300 may include a second-1 substrate 310 and a second-2 substrate 320.

A relay module 311 to which a control signal of the user equipment 10 is applied through the controller and a power supply module for converting the external power supply to the rating and supplying the power supply module to the lighting apparatus 20 can be mounted on the second substrate 300 have. In this case, the relay module 311 can be mounted on the 2-1 substrate 310, and the power supply module can be mounted on the 2-2 substrate 320.

The relay module 311 can receive the control signal of the user equipment 10 through the communication module. The relay module 311 can control the relay on and off by the control signal of the user equipment 10 in the active mode of the illumination switch device 1000. [

The relay module 311 may be a member in which a power line drawn out from the active line 1 and the lighting device 20 is docked to be electrically connected to the external power source and the lighting device 20. [

In the turn-on state of the relay, the external power source is supplied to the lighting device 20 so that the lighting device 20 can be turned on. The external power source is prevented from being supplied to the lighting apparatus 20 in the turn-off state of the relay, so that the lighting apparatus 20 can be turned off. That is, the relay module 311 may be a power switch integrated circuit that supplies and blocks power according to a control signal of the user equipment 10. [

The power supply module may be a power stabilizing integrated circuit that rectifies the external power supply or boosts or reduces the voltage. To this end, the power supply module may include a transformer element or the like.

The 2-1 substrate 310 and the 2-2 substrate 320 may be electrically connected by one or more second connectors 321. [ Thus, the 2-1 substrate 310 and the 2-2 substrate 320 can transmit and receive power and signals from each other. Further, the second-2 substrate 320 may be electrically connected to the first substrate 200 through the second-1 substrate 310, and the second-2 substrate 320 and the first substrate 200 may be electrically connected to each other. And can transmit and receive mutual power and signals.

In the capacitor 400, the residual power of the lighting device 20 can be charged, and the power charged in the capacitor 400 can be supplied to the controller. That is, although the capacitor 400 is smaller in size than the rechargeable battery, the capacitor 400 can perform substantially the same function as the rechargeable battery.

The capacitor 400 is smaller in size than a general battery, and the charge amount is small, such as 3.3V or 3.8V, for example. However, the capacitor 400 can supply the power required when the controller switches from the inactive mode to the active mode, which requires a large amount of power consumption. After the lighting apparatus 20 is turned on, the controller can sufficiently receive power through a power supply line branched from an external power supply.

The button 500 may be a part provided for manual operation of the user. The button 500 has a built-in signal generator and can transmit a control signal by a user's manual operation to the relay module through the controller.

That is, the user can remotely control the lighting switch device 1000 of the present invention through the user device 10, and can manually control the button 500 manually. For example, the user can click the button 500 to change the operation mode of the lighting switch device 1000 of the present invention, and to perform the on-off control of the lighting device 20. [ Furthermore, the user device 10 and the lighting switch device 1000 may be paired.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, You will understand. Therefore, it should be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

Claims (10)

case;
A first board on which a controller for wireless communication with a user equipment is mounted; And
A plurality of second boards mounted on a relay module to which a control signal of the user equipment is applied through the controller and a power supply module for converting an external power supply to a rating and supplying the rated power to the lighting equipment,
A first space in which the first substrate is disposed, a second space in which a part of the plurality of second substrates are arranged, and a third space in which the rest of the plurality of second substrates are arranged is formed in the case However,
The first space of the case, the second space of the case and the third space of the case are sequentially arranged from the front to the rear,
Wherein an internal area of the first space of the case is larger than a built-in area of the second space of the case, a built-in area of the second space of the case is wider than an internal area of the third space of the case,
The controller includes a communication module for wirelessly communicating with the user equipment and applying a control signal of the user equipment to the relay module, and an antenna,
Wherein the antenna is positioned so as to be deflected to one side in the vertical direction to the edge of the first substrate so as to face the case.
The method according to claim 1,
Wherein the electrical length of the second space of the case is longer than the electrical length of the third space of the case and the electrical length of the third space of the case is longer than the electrical length of the first space of the case.
The method according to claim 1,
The case includes a front case and a rear case,
The front case includes a main body and a side plate projecting rearward from an edge of the main body of the front case,
The rear case includes a side plate projecting forward from an edge of the main body of the main body and the rear case, a first depression recessed backward from the main body of the rear case, and a second depression recessed backward from the first depression .
The method of claim 3,
The first space of the case is formed such that the main body of the front case and the main body of the rear case are mutually opposed and the side plate of the front case and the side plate of the rear case are mutually overlapped,
The second space of the case is formed inside the first depression of the rear case,
And a third space of the case is formed inside the second depression of the rear case.
The method of claim 3,
Wherein the lighting switch device is exposed frontward in the main body of the front case, and further comprises a button for applying a control signal to the relay module by manual operation of the user.
The method according to claim 1,
Wherein the relay module controls on / off of the relay, and the external power is supplied to the lighting device in the turn-on state of the relay, and the external power is prevented from being supplied to the lighting device in the turn-off state of the relay.
The method according to claim 1,
Wherein the lighting switch device further comprises a capacitor which is disposed in a third space of the case and is located behind the plurality of second substrates and supplies the remaining power of the lighting equipment to the controller.
The method according to claim 1,
And a pocket-shaped groove portion for receiving the antenna is formed in the case.
The method according to claim 1,
Wherein one of the plurality of second substrates is disposed in a second space of the case, and the remaining one of the plurality of second substrates is disposed in a third space of the case.
10. The method of claim 9,
Wherein the relay module is mounted on the rear side of the second substrate and is positioned at the lower end of the second space of the case.

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