COUPLING ELEMENT AND THIS COMPREHENSIVE POWER ELECTRONICS DEVICE

Abstract

A coupling element and a power electronics device comprising the same are disclosed. A coupling element according to one aspect of the present disclosure is removably coupled to an external power electronics device and includes a coupling body and a coupling arm extending from one side of the coupling body with respect to a height direction and removably coupled to the power electronics device, wherein the coupling arm includes a coupling extension portion extending from one side of the coupling body into the interior of the power electronics device, and a coupling projection protruding from one end of the coupling extension portion and coupled to an inner surface of the power electronics device, and wherein the coupling arm is provided as a plurality of coupling arms, and the plurality of coupling arms are arranged to be spaced apart from each other in one direction.

Description

[Technical Field]The present disclosure relates to a coupling member and a power electronic device including the same, and more particularly to a coupling member having a structure that enables easy coupling of a power electronic device to a connection module configured for communication and electric conduction with the power electronic device, and a power electronic device including the same.[Background art]A programmable logic controller (PLC), which is a kind of power electronic device, is a programmable logic controller, and the PLC is frequently used to perform process control such as automatic control of devices and batch tasks. In an PLC, a circuit board configured to process a control signal and a capacitor or the like configured to power the circuit board are provided.The PLC is conventionally provided as a single device and provides only a preset power capacity. However, recently, a configuration in which the PLC is provided in the form of a module and the power capacity varies depending on the number of power electronic devices has been adopted. To this end, multiple PLCs are coupled to a device referred to as a base.Because the PLC is provided in the form of a module, the power capacity may vary, and if there is a problem with only one PLC of the multiple PLCs, it may be removed, repaired, and then coupled back to the base. Therefore, the PLC provided in the form of a module is becoming increasingly used.However, unlike the prior art in which the PLC is fixedly coupled to the base, various problems occur because the PLC is removably coupled to the base.If the PLC and the base are incompletely coupled, there is a risk that the PLC and the base are damaged and unintentionally separated. In addition, there is a possibility that a portion to which the PLC and the base are coupled is damaged due to the discomfort of an operator.When the PLC provided in the form of a module needs to be repaired, a cover of the PLC needs to be removed to replace the component with the problem.Given that the cover of the PLC is integrally formed for rigidity, it is typically difficult, should the cover have to be removed for repair of the corresponding component, to maintain rigidity after re-installation of the cover to the extent as before repair. Therefore, there is a problem that labor and user-friendliness are deteriorated because an excessively large amount of time and cost are required for maintenance.In addition, when the cover of the PLC is integrally formed, the portion to which the PLC and the base are coupled may be excessively loaded due to vibrations occurring during operation of the PLC and the base or due to an impact in coupling or disconnecting the PLC and the base. In this case, the probability of damage to the corresponding coupled portion is also increased. Therefore, when the cover of the PLC is integrally formed, there is a need to replace the entire cover in order to repair the corresponding portion.When the PLC and the cover are integrally formed, it is necessary to add components such as the circuit board to the replacement of the cover. For this reason, there is a possibility that the configuration of the PLC is damaged and reliability deteriorates during the reassembly process.KR 10 1 342 513 B1 discloses a predefined base for an electronic power meter. In particular, in the disclosed predefined base for the electronic power meter, an input-side terminal block and an output-side terminal block of a terminal base are configured to be detachable in a predefined manner such that a power capacity of the power meter may vary.However, the basis for an electronic power meter predefined in the above-mentioned patent document only discloses the configuration in which the input / output side terminal blocks are detachably coupled in a predefined manner so as to be able to vary the power capacity. The above patent document cannot provide a solution that counteracts damage to the terminal block or the predefined base caused by shock by coupling or disconnecting the input / output side terminal blocks and the predefined base.KR 10 1 011 034 B1 discloses a modular measuring instrument integration system with a modularized housing of a measuring circuit. In particular, in the modular meter integration system having the modularized housing of the measurement circuit, the meter may be modularized and removably mounted on a base part such that the number of meter modules may vary.However, the modular meter integration system including the modularized meter circuit housing disclosed in the above patent document requires a separate guide for storing the coupled meter module. In addition, in the above-mentioned patent document, a base module is configured as a support of the meter module from below the meter module. However, the base module is limited in that it is difficult to apply in another direction such as a forward / backward direction or a left / right direction.Further, the above-mentioned patent documents cannot provide a solution in which the coupling state between the PLC and the base can be maintained by damping the vibration occurring during the operation of the PLC.KR 10 1 342 513 B1 (January 2, 2014)KR 10 1 011 034 B1 (January 26, 2011)[Disclosure][Technical Object]It is an object of the present disclosure to solve the above problem and provide a coupling member having a structure in which a power electronic device and a terminal module can be coupled by a separate member, and a power electronic device including the same.Another object of the present disclosure is to provide a coupling member having a structure that resists damage to the power electronic device, and a power electronic device including the same.Another object of the present disclosure is to provide a coupling member having a structure that resists damage to the power electronic device by vibration, and a power electronic device including the same.Another object of the present disclosure is to provide a coupling member having a structure that resists unintentional movement of the power electronic device, and a power electronic device including the same.Another object of the present disclosure is to provide a coupling member having a structure capable of stably maintaining a coupling state between the power electronic device and the terminal member, and a power electronic device including the same.The technical objects to be achieved by the present disclosure are not limited to the above technical objects, and a person skilled in the art can find out other technical objects not mentioned above from the descriptions below in the present disclosure.[Technical Solution]A coupling member according to an aspect of the present disclosure is removably coupled to an external power electronic device, the coupling member comprising: a coupling body; and a coupling arm extending from a side of the coupling body with respect to a height direction and removably coupled to the power electronic device, wherein the coupling arm comprises: a coupling extension portion extending from a side of the coupling body to inside of the power electronic device; and a coupling protrusion protruding from an end of the coupling extension portion and coupled to an inner surface of the power electronic device, and wherein the coupling arm is provided as a plurality of coupling arms, and the plurality of coupling arms are arranged so as to be spaced apart from each other in one direction.In this case, the coupling arms may include: a first coupling arm disposed toward one side of the coupling body with respect to a longitudinal direction; and a second coupling arm disposed toward the other side of the coupling body opposite to the one side with respect to the longitudinal direction.In addition, a first coupling protrusion of the first coupling arm protrudes to one side with respect to the longitudinal direction, and a second coupling protrusion of the second coupling arm protrudes to the other side with respect to the longitudinal direction.In this case, the coupling arm and the power electronic device may be coupled by hook fitting.Further, the coupling member may include: a support arm extending to be inclined with respect to the longitudinal direction from a side of the coupling body toward the power electronic device, and having an end with respect to its extending direction disposed to protrude from an end of a side of the coupling body with respect to a height direction, wherein the support arm is configured to elastically support the coupling body.In this case, the support arm may include: a first support arm disposed toward one side of the coupling body with respect to a transverse direction; and a second support arm disposed to be spaced apart from the first support arm and disposed toward the other side of the coupling body with respect to the transverse direction.Further, the coupling member may include: a plurality of guide grooves formed in a side surface of the coupling body with respect to a lateral direction and configured to movably receive a guide flat provided in the power electronic device; and a guide rib disposed between the plurality of guide grooves, extending from the inside of the coupling body in the height direction of the coupling body, and inserted into a rib receiving portion provided in the power electronic device.In this case, the coupling body may include: a first coupling body extending in the height direction; a second coupling body provided continuously with one side of the first coupling body with respect to a longitudinal direction and extending in the longitudinal direction; and a coupling protrusion portion disposed at one end of the second coupling body and protruding toward the other side with respect to the height direction.Further, the coupling protrusion portion may include: a first support surface inclined to the other side with respect to the height direction; and a second support surface provided continuously with the first support surface and inclined to the one side with respect to the height direction, and the coupling body may include a pressing depression formed recessed in the second support surface.Further, the power electronic device according to an aspect of the present disclosure includes: a housing having a space therein; a coupling member attachment / removal part disposed on a rear upper side of the housing; and a coupling member removably coupled to the coupling member attachment / removal part, the coupling member attachment / removal part including: a coupling member accommodating portion open at upper and rear sides thereof and partially surrounded by an upper surface of the housing; and a coupling opening portion formed in the upper surface of the housing, and the coupling member including: a coupling body accommodated in the coupling member accommodating portion; and a coupling arm extending from a lower side of the coupling body, engaging and being coupled to the coupling opening portion.In this case, the coupling opening portion may include: a first coupling opening portion disposed toward a front side of the coupling member accommodating portion; and a second coupling opening portion disposed toward a rear side of the coupling member accommodating portion, and the coupling arm may include: a first coupling arm disposed toward a front side of the coupling body and configured to engage with the first coupling opening portion; and a second coupling arm disposed toward a rear side of the coupling body and configured to engage with the second coupling opening portion.Further, the first coupling arm may include: a first coupling extension portion provided continuously with the coupling body and configured to engage with the first coupling opening portion; and a first coupling protrusion disposed at an end of the first coupling extension portion, protruding forward, and coupled to an upper inner surface of the housing, and second the coupling arm may include: a second coupling extension portion provided continuously with the coupling body and configured to engage with the second coupling opening portion; and a second coupling protrusion disposed at an end of the second coupling extension portion, protruding rearward, and coupled to an upper inner surface of the housing.In this case, the coupling member may include a support arm provided continuously with a rear side of the coupling body and inclined rearward such that a lower end thereof protrudes downward beyond a lower end of the coupling body, the support arm being configured to elastically support the coupling body, the coupling body may be spaced apart from the upper surface of the housing, and the support arm may be in contact with the upper surface of the housing.Further, the coupling member attaching / removing part may include a guide flat part protruding in an up / down direction, extending in a left / right direction, and formed to have a thickness in a forward / backward direction, and the coupling member may include a guide groove formed in a surface of the coupling body with respect to the left / right direction, extending in the up / down direction, and configured to movably receive the guide flat part.Further, the guide flat member may include: a first guide flat member disposed toward one side with respect to the left / right direction; and a second guide flat member disposed toward the other side with respect to the left / right direction and disposed to be spaced apart from the first guide flat member, and the guide groove may include: a first guide groove formed in a left surface of the coupling body in the up / down direction and configured to movably accommodate the first guide flat member; and a second guide groove formed in a right surface of the coupling body in the up / down direction and configured to movably accommodate the second guide flat member.Further, the coupling member attaching / removing part may include a rib receiving portion formed between the first guide sheet and the second guide sheet, and the coupling member may include: a sheet receiving groove recessed on a lower surface of the coupling body and configured to receive the first guide sheet and the second guide sheet, and further configured to communicate with the first guide groove and the second guide groove; and a guide rib disposed in the sheet receiving groove, extending in the forward / rearward direction and the upward / downward direction, and being accommodated in the rib receiving portion.Further, the coupling body may include: a first coupling body extending in an up / down direction; a second coupling body provided continuously with the first coupling body and extending in the forward / backward direction; and a coupling protrusion portion disposed at a rear end of the second coupling body, protruding upward, and coupled to a holding member provided in an external terminal member.Further, the coupling protrusion portion may include: a first support surface formed such that a front surface thereof slopes rearward and upward; and a second support surface formed such that a rear surface is provided continuously with the first support surface and slopes rearward and downward, and the terminal member holding member may include: a first extension arm extending forward; a second extension arm disposed at a front end of the first extension arm, protruding toward the coupling protrusion portion, and coupled to the coupling protrusion portion by a hook fit.Furthermore, the coupling body can comprise a pressure depression which is formed in a recessed manner in the second bearing surface.Further, the coupling body may include: a first coupling body extending in an up / down direction; and a pressing protrusion portion protruding upward from an upper end of the first coupling body, and the pressing protrusion portion may be exposed to the outside of a holding member provided on an external terminal module and coupled to the coupling member by a hook fit.[Advantageous Effects]According to the aforementioned configuration, in the coupling member and the power electronic device including the same according to the embodiment of the present disclosure, the power electronic device and the terminal member may be coupled by a separate member.The coupling element is provided in the power electronic device. The coupling member is removably coupled to the coupling member attachment / detachment part provided in the power electronic device. The coupling element comprises a coupling arm which extends in the direction of the power electronics device. The coupling member attaching / removing part includes a coupling hole portion formed in the upper surface of the housing, and the coupling arm is removable and engagedly coupled to the coupling hole portion.The coupling arm includes a coupling extension portion extending toward the coupling opening portion and being engagedly coupled to the coupling opening portion, and a coupling protrusion protruding outward from an end of the coupling extension portion and being coupled to the coupling opening portion by a hook fit.Thus, when the coupling member and the coupling member attachment / removal part are coupled, the coupling member and the housing of the power electronic device can be removably coupled.The coupling member further includes a coupling body configured to form a body thereof and a coupling protrusion portion provided continuously with the coupling body. The coupling protrusion portion protrudes upward.The connection element to which the coupling element is removably coupled has a holding element. The retaining member includes a first extension arm extending forward and a second extension arm extending from an end of the first extension arm toward the coupling member.When the power electronic device to which the coupling member is coupled moves toward the terminal module, the coupling protrusion portion presses the second extension arm, and the second extension arm stores a restoring force, and the shape deforms upward. When the coupling protrusion portion is pushed beyond the second extension arm, the second extension arm is restored to the original shape due to the restoring force and is coupled to the coupling protrusion portion by hook fitting.Thus, the power electronic device and the connector can be removably coupled by the single coupling element.In addition, in the above-described configuration according to the embodiment of the present disclosure, the coupling member and the power electronic device including the same is possible to prevent damage to the power electronic device.As described above, the power electronic device and the connector are removably coupled by the coupling member. Therefore, in the case that the coupling member is damaged, maintenance can be performed by only removing the coupling member. It is therefore not necessary for maintenance on the coupling element to remove the components configured in the power electronics device.Because maintenance can be performed by only separating the coupling member, damage to the components configured in the power electronic device can be suppressed.In addition, in the above-described configuration according to the embodiment of the present disclosure, the coupling member and the power electronic device including the same is possible to prevent damage to the power electronic device due to vibration.The coupling element comprises a support arm. The support arm is disposed at a lowermost side of a portion of the coupling member. In other words, the support arm is disposed at the lowermost side of the portion exposed to the outside when the coupling member is coupled to the power electronic device. Therefore, the support arm is in contact with the upper surface of the housing and can elastically support the other components of the coupling member.When vibrations occur during operation of the power electronic device or the terminal member, the support arm stores an elastic force by deforming due to pressure. Thus, the oscillation of the power electronics device is counteracted in such a way that a force effect on the components of the power electronics device due to transmitted oscillation can be minimized.Thereby, it is possible to prevent damage to the components due to vibrations of the power electronic device.In addition, in the above-described configuration according to the embodiment of the present disclosure, the coupling member and the power electronic device including the same is possible to prevent unintentional movement.The coupling element comprises a guide part. The guide part includes a plurality of guide grooves formed in the left and right surfaces of the coupling body and extending in the up / down direction. A plurality of guide flat parts provided in the coupling member attachment / detachment part are movably accommodated in the plurality of guide grooves. The coupling between the guide flat part and the guide groove can prevent unintentional movement of the power electronic device along the forward / rearward direction.Further, the guide part includes a flat part receiving groove that is a space recessed in the coupling body. In the flat part accommodation groove, a guide rib is provided which extends in the forward / rearward direction and the upward / downward direction. In the coupling member attaching / removing part, a rib accommodating portion is provided, and the rib accommodating portion is a space formed between the plurality of guide flat parts spaced apart from each other. The guide rib is submergible in the rib accommodating portion and is defined in the left / right direction by the plurality of guide flat parts. The coupling between the guide rib and the rib receiving portion can prevent unintentional movement of the power electronic device along the left / right direction.Thus, an unintentional movement of the power electronics device can be counteracted.In addition, in the above-described configuration according to the embodiment of the present disclosure, the coupling member and the power electronic device including the same is possible to stably maintain the coupling state between the power electronic device and the terminal member.In the above-described configuration, the coupling member is coupled to the power electronic device and the terminal member by a hook fit. When no external force acts in a predetermined direction, the coupling member is not unintentionally separated from the power electronic device or the terminal member.Further, the support arm is provided on the coupling member. The support arm is configured to counteract an upward / downward vibration acting on the power electronics device. Thus, it is possible to stably maintain the coupling state between the power electronic device, the terminal member, and the coupling member.Further, the guide part is provided to the coupling member, and the member guide part is couplable to the coupling member attachment / detachment part. By the coupling between the guide part and an element guide part, it is possible to counteract unintentional movement of the power electronic device along the forward / rearward direction and the left / right direction.Thus, it is possible to stably couple the coupling member to the power electronic device and the connector member, counteract vibration in the up / down direction, and prevent unintentional movement in the forward / backward direction and the left / right direction. As a result, it is possible to stably maintain the coupling state between the coupling member, the power electronic device, and the terminal member.The effects of the present disclosure are not limited to the above-mentioned effects, and it is understood that the effects of the present disclosure include all the effects that can be derived from the detailed description of the present disclosure or the appended claims.[Description of Drawings]FIG. 1 is a perspective view showing a state in which a terminal module and a power electronic device according to the embodiment of the present disclosure are coupled. FIG. 2 is a perspective view showing a state in which the terminal module and the power electronic device in FIG. 1 are separated. FIG. 3 is a front view showing the terminal module of FIG. 1. FIG. 4 is a partially enlarged perspective view showing the terminal module of FIG. 1. FIG. 5 is a side cross-sectional view showing the terminal module of FIG. 1. FIG. 6 is a perspective view showing the power electronic device in FIG. 1. FIG. 7 is a partially enlarged perspective view showing the power electronic device of FIG. 6. FIG. 8 is a partially enlarged plan view showing the power electronic device of FIG. 6. FIGS. 9 and 10 are perspective views showing a coupling member provided in the power electronic device of FIG. 1. FIG. 11 is a front view showing the coupling member provided in the power electronic device of FIG. 1. FIG. 12 is a rear view showing the coupling member provided in the power electronic device of FIG. 1. FIG. 13 is a plan view showing the coupling member provided in the power electronic device of FIG. 1. FIG. 14 is a bottom view showing the coupling member provided in the power electronic device of FIG. 1. FIG. 15 is a right side view showing the coupling member provided in the power electronic device of FIG. 1. FIGS. 16 to 20 are use state views showing a method in which the coupling member of FIG. 9 is coupled to the power electronic device of FIG. 6 and shows a coupled state. FIGS. 21 to 23 are use state views showing a method in which the power electronic device and the terminal member of FIG. 1 are coupled and show a coupled state.[Preferred Embodiment]Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings such that one of ordinary skill in the art can easily realize the embodiments. The present disclosure may be practiced in various ways and is not limited to the embodiments described herein. In the drawings, components irrelevant to the description are omitted so that the present disclosure is clearly described, and the same or similar components are denoted by the same reference numerals throughout the specification.Terms or words used in the specification and claims should not be considered limited to their general language or literal meaning. Meaning and term should follow the basic principle in view of a technical teaching of the present disclosure that inventors can appropriately define the meaning of a term for best describing the own invention.Therefore, the embodiments disclosed in the present specification and the configurations illustrated in the drawings are merely exemplary embodiments of the present disclosure, and do not constitute the entire technical teaching of the present disclosure. Accordingly, it is apparent that at the time of filing of the present application, various equivalents and modified examples can be made which are the same as the embodiments.In the following description, the description of some components may be omitted to clarify the features of the present disclosure.1. Terminology determinationsThe term "in connection" used in the following description may mean that one or more elements are connected to each other, implementing fluidic connection. In the embodiment, the connection may be implemented by members such as pipes, pipes, hoses, and the like.The term "electrical lead" used in the following description means that one or more elements are connected to each other such that electric current or an electrical signal can be transmitted between the elements. In the embodiment, the electric line may be implemented in a wired manner by a conductive wire member or the like, or may be implemented in a wireless manner by Bluetooth, Wi-Fi, RFID, or the like.In the following description, the terms "upper side", "lower side", "left side", "right side", "front side", and "rear side" may be understood with reference to a coordinate system shown in FIGS. 1 and 6.2. Description of Terminal Module 10 According to Embodiment of the Present DisclosureFIGS. 1 to 2 show the terminal module 10 according to the embodiment of the present disclosure.The connection module 10 communicates with and electrical conduction to an external power source and an external load. The terminal module 10 may receive power from the external power source and transmit power to the external load.The connection module 10 can be used to communicate and electrically lead with a power electronics device 20. The connection module 10 can transmit the power absorbed to the power electronics device 20 and absorb power from the power electronics device 20.The connection module 10 is coupled to the power electronics device 20. In particular, the connection module 10 is removably coupled to the power electronics device 20. In the embodiment, the terminal module 10 may be removably coupled to a plurality of power electronics devices 20.The terminal module 10 may be provided in any form with which electrical conduction to and communication with the external power source, load, and power electronics device 20 may occur and with which it may be detachably coupled to the power electronics device 20. In the illustrated embodiment, the terminal module 10 extends in a left / right direction and is formed quadrangular flat, having a height in an up / down direction.In one embodiment, the power electronics device 20 may be moved rearward and coupled to the connector module 10 or moved forward and disconnected from the connector module 10. In this case, the coupling and disconnection between the terminal module 10 and the power electronic device 20 can be easily performed by a coupling member 400, and a detailed description thereof will be given below.In the embodiment shown in FIGS. 3 to 5, the connection module 10 comprises a connection body 100.The terminal body 100 constitutes a body of the terminal module 10. In the illustrated embodiment, the terminal body 100 is formed quadrangular flat, having a length in the left / right direction and a height in the up / down direction.In the embodiment shown, one side, in particular a front side, at which the power electronics device 20 is coupled to the connection body 100 is open.In the embodiment shown, the terminal body 100 includes an electrical lead member 110, slot members 120, a support base 130, support members 140, device receiving portions 150, and mounting holes 160.The electric conduction member 110 of the terminal module 10 is a portion in which communication with and electric conduction to the external power source and the external load are made. Wired or wireless communication with and electrical conduction to the external power source and the external load takes place via the electrical line element 110.Communication and electrical conduction with the slot element 120 take place via the electrical line element 110. As described below, the slot element 120 is provided as a plurality of slot elements 120, and the plurality of slot elements 120 are respectively coupled to the plurality of power electronics devices 20, thereby communicating with and electrically conducting to the plurality of power electronics devices 20. Communication and electrical conduction with the plurality of slot elements 120 are effected via the electrical line element 110. Thus, communication with and electrical conduction to the respective power electronics device 20 can be effected via the electrical line element 110 through the slot elements 120.The electrical conducting element 110 may be arranged at any position where communication and electrical conduction between the external power source, the external load, and the slot element 120 may occur via the electrical conducting element 110. In the embodiment shown, the electrical line element 110 is arranged at one end, in particular at a left end, of the connection body 100 with respect to a longitudinal direction.The electrical lead member 110 may have any form in which communication with and electrical conduction to the external power source, load, and slot member 120 may occur. In the illustrated embodiment, the electric conduction member 110 has a three-dimensional shape having a height in the up / down direction, a width in the left / right direction, and a thickness in the forward / rearward direction.Although no reference numeral is provided, the electric conduction member 110 may include a connector accommodating portion. The connector accommodating portion may accommodate a connector through which communication with and electric conduction to the external power source or the external load occurs. Thus, communication and electrical conduction may occur between the external power source or load and the electrical conduction element 110.The slot members 120 are provided on one surface of the electric wiring member 110, particularly on the front surface in the illustrated embodiment, being aligned with the power electronic device 20.The slot element 120 is a portion of the terminal body 100 in which communication with and electrical conduction to the power electronics device 20 takes place. A connection element 240 of the power electronics device 20 is removably inserted into the slot element 120. By means of the coupling described above, communication and electrical conduction can take place between the slot element 120 and the connection element 240 in such a way that communication and electrical conduction can take place between the connection module 10 and the power electronics device 20.The slot element 120 may be formed to have a shape corresponding to the terminal element 240. In the illustrated embodiment, the slot member 120 has a quadrangular pillar shape extending in the up / down direction and protruding forward. An opening portion for accommodating the terminal member 240 is recessed in a front surface of the slot member 120.The slot members 120 may be disposed at positions corresponding to positions of the base grooves 131 of the support base 130 and positions of the support members 140, respectively. In addition, the slot member 120 may be disposed to correspond to a position of the terminal member 240 of the power electronic device 20 coupled to the base groove 131 and the holding member 140.In the illustrated embodiment, the slot member 120 is disposed to overlap the base groove 131 in the height direction, particularly in the up / down direction, and is disposed to be offset rightward with respect to the holding member 140.The slot elements 120 may be provided as a plurality of slot elements 120. The plurality of slot members 120 may be spaced apart from each other in the longitudinal direction of the terminal body 100. In the illustrated embodiment, ten slot elements 120 are provided and arranged to be spaced apart from each other in the left / right direction. A spacing distance between the slot elements 120 may vary depending on a length of a housing 200 of the power electronics device 20 in a transverse direction, in particular a length in the left / right direction in the embodiment shown.The support base 130 is disposed below the slot member 120.On the support base 130, the power electronic device 20 coupled to the terminal module 10 is located on one side with respect to the height direction, particularly on the lower side in the illustrated embodiment. On the support base 130, a rear side of a lower portion of the housing 200 of the power electronic device 20 partially abuts.The support base 130 is disposed at one end of the terminal body 100 with respect to the height direction, particularly at the lower end in the illustrated embodiment. The support base 130 protrudes in a direction in which the power electronic device 20 is separated, specifically, the support base 130 protrudes toward the front side in the illustrated embodiment.The support base 130 extends in the same direction as the terminal body 100. In the illustrated embodiment, the support base 130 extends in the left / right direction. One end of the support base 130 with respect to the extending direction, particularly the left end in the illustrated embodiment, extends to the electric wiring member 110. The other end of the support base 130 with respect to the extending direction, specifically, the right end in the illustrated embodiment extends to the right end of the terminal body 100.In the embodiment shown, the support base 130 includes the base groove 131.A protrusion (not shown) formed at a lower portion of the housing 200 of the power electronic device 20 resting on the support base 130 is inserted into and coupled to the base groove 131. A lower side of the power electronic device 20 may be stably fixed by the base groove 131.The base groove 131 is formed inside the support base 130. The base groove 131 extends in a thickness direction of the support base 130, particularly in the up / down direction in the illustrated embodiment.The base groove 131 extends in the same direction as the support base 130. In the illustrated embodiment, the base groove 131 extends in the left / right direction.The base groove 131 may have any shape into which a protrusion (not shown) provided on the housing 200 of the power electronic device 20 is insertable and couplable thereto. In the illustrated embodiment, the base groove 131 is formed to have a rectangular cross section having a length in the left / right direction and a width in the front / rear direction, and is formed to have a height in the up / down direction.In this case, a width of the base groove 131 in the forward / rearward direction may correspond to a width and a length of the protrusion (not shown) in the forward / rearward direction.The base groove 131 may be provided as a plurality of base grooves 131. The plurality of base grooves 131 may be spaced apart from each other in a direction in which the support base 130 extends. In addition, the plurality of base grooves 131 may be arranged to correspond to the positions of the slot members 120 and the positions of the holding members 140.In the illustrated embodiment, ten base grooves 131 are formed to correspond to the number of slot members 120, and are disposed to be spaced apart from each other in the left / right direction. The base grooves 131 are each disposed so as to overlap the slot member 120 and the holding member 140 in the height direction, particularly in the up / down direction in the illustrated embodiment.The base groove 131 may be formed in any shape into which the protrusion (not shown) provided on the housing 200 of each of the plurality of power electronic devices 20 is insertable.For example, the base groove 131 may be provided as a single base groove 131 extending between the ends of the support base 130 with respect to the extending direction, in particular between the left and right ends in the illustrated embodiment. In the embodiment, the protrusion (not shown) provided on the housing 200 of each of the plurality of power electronic devices 20 may be insertable into the single base groove 131.Alternatively, the base groove 131 may be provided as a plurality of base grooves 131, and a length of the base groove 131 may be longer than the length of the housing 200 in the transverse direction, specifically, the length in the left / right direction in the illustrated embodiment. In an embodiment, the protrusion (not shown) provided on the respective housing 200 of a plurality of the power electronics devices 20 may be each insertable into a base groove of the plurality of base grooves 131. That is, the number of the base grooves 131 may be smaller than the number of the power electronic devices 20 such that a plurality of the power electronic devices 20 may be respectively seated on one of the plurality of base grooves 131.The support base 130 faces the holding member 140 with the slot member 120 interposed therebetween.The holding member 140 holds the power electronic device 20 coupled to the terminal module 10 on the other side with respect to the height direction, particularly on the upper side in the illustrated embodiment. The holding member 140 is coupled to the coupling member 400 coupled to a coupling member attachment / removal part 300 of the power electronic device 20, and partially holds a rear side of an upper portion of the power electronic device 20.The holding member 140 is disposed at the other end of the terminal body 100 with respect to the height direction, particularly at the upper end in the illustrated embodiment. The holding member 140 protrudes in a direction in which the power electronic device 20 is separated, particularly toward the front side in the illustrated embodiment.The holding member 140 is removably coupled to the coupling member 400 provided in the power electronic device 20. In one embodiment, the retaining member 140 may be coupled to the coupling member 400 by a hook fit. Therefore, in the case that a predetermined force is not applied in a predetermined direction, the coupling state between the holding member 140 and the coupling member 400 can be maintained.The holding member 140 may be disposed at any position where the holding member 140 may be coupled to the coupling member 400 of the power electronic device 20. In the illustrated embodiment, the holding member 140 is disposed to overlap the slot member 120 and the base groove 131 in the height direction of the terminal body 100, particularly in the up / down direction.The holding element 140 may be provided as a plurality of holding elements 140. The plurality of holding elements 140 may be arranged spaced apart from one another in the longitudinal direction of the connection body 100. In the illustrated embodiment, ten holding members 140 are provided and arranged so as to be spaced apart from each other in the left / right direction.In the illustrated embodiment, the holding member 140 includes a first extension arm 141, a second extension arm 142, a third extension arm 143, and an element receiving portion 144.The first extension arm 141 forms a part of the holding member 140. The first extension arm 141 extends outward from the upper end of the terminal body 100, in particular, toward the front side in the illustrated embodiment. The first extension arm 141 forms an upper side of the holding member 140.The first extension arm 141 partially covers the coupling member 400 and the coupling member attachment / removal part 300 to which the coupling member 400 is coupled from above. As described below, the first extension arm 141 covers a part of a second coupling body 412 of the coupling member 400 from above.An end of the first extension arm 141 with respect to the extending direction, which is coupled to the terminal body 100, specifically, the rear end in the illustrated embodiment, is provided continuously with the upper end of the terminal body 100. The other end of the first extension arm 141 with respect to the extending direction, which is directed toward the power electronic device 20, specifically, the front end in the illustrated embodiment, is provided continuously with the second extension arm 142.The second extension arm 142 is removably coupled to a coupling protrusion portion 416 formed at the end of the second coupling body 412. In one embodiment, the second extension arm 142 may be coupled to the coupling protrusion portion 416 by a hook fit.At the same time, the second extension arm 142 presses an upper surface of the second coupling body 412. Therefore, the coupling member 400 and the holding member 140 can be removably coupled, and the coupling state can be stably maintained.The second extension arm 142 is provided continuously with the first extension arm 141. The second extension arm 142 is provided continuously with the other end of the first extension arm 141, particularly the front end in the illustrated embodiment.The second extension arm 142 may be divided into a plurality of sections. In the illustrated embodiment, the second extension arm 142 includes a first extension surface 142 a, a second extension surface 142 b, a third extension surface 142 c, a fourth extension surface 142 d, and a fifth extension surface 142 e.The first extension surface 142 ais a portion provided continuously with the first extension arm 141 as one of the portions of the second extension arm 142. The first extension surface 142 aextends at a predetermined angle with respect to the first extension arm 141. In the illustrated embodiment, the first extension surface 142 aextends at an obtuse angle with respect to the first extension arm 141 toward the front lower side. In other words, the first extension surface 142 aextends to be inclined from the rear upper side toward the front lower side.The second extension surface 142 bis provided continuously with the first extension surface 142 aat a predetermined angle. In the embodiment shown, the second extension surface 142 bextends at an obtuse angle with respect to the first extension surface 142 ain the direction towards the coupling element 400, in particular in the direction towards the lower side. In other words, the second extension surface 142 bextends to be inclined in the up / down direction.The third extension surface 142 cis provided continuously with the second extension surface 142 bat a predetermined angle. In the embodiment shown, the third extension surface 142 cextends at an obtuse angle with respect to the second extension surface 142 btoward the coupling element 400, in particular toward the rear lower side. In other words, the third extension surface 142 cextends to be inclined from the rear lower side toward the front upper side.When the power electronic device 20 moves toward the terminal module 10, the third extension surface 142 cis contacted with the coupling protrusion portion 416 of the coupling member 400. In this case, a second support surface 416 bof the coupling protrusion portion 416 extends to be inclined corresponding to the third extension surface 142 c. Therefore, the coupling element 400 can be easily inserted into the holding element 140 and coupled therewith.The fourth extension surface 142 dis provided continuously with the third extension surface 142 cat a predetermined angle. In the embodiment shown, the fourth extension surface 142 dextends at an obtuse angle with respect to the third extension surface 142 cin the direction of the terminal body 100, in particular in the direction of the rear side in the embodiment shown. In other words, the fourth extension surface 142 dextends to be inclined in the front / rear direction.When the coupling member 400 is coupled to the holding member 140, an upper surface of the second coupling body 412 of the coupling body 410 may come into contact with the fourth extension surface 142 d. Therefore, the coupling state of the coupling member 400 coupled to the terminal module 10 can be stably maintained.The fifth extension surface 142 eis provided continuously with the fourth extension surface 142 dat a predetermined angle. In the embodiment shown, the fifth extension surface 142 eextends at an obtuse angle with respect to the fourth extension surface 142 dtoward the first extension arm 141, in particular toward the rear upper side. In other words, the fifth extension surface 142 eextends to be inclined from the rear upper side toward the front lower side.When the coupling member 400 is coupled to the holding member 140, the fifth extension surface 142 ecomes in contact with the coupling protrusion portion 416 of the coupling body 410. In this case, a first support surface 416 aof the coupling protrusion portion 416 may extend to be inclined corresponding to the fifth extension surface 142 e. Therefore, the coupling protrusion portion 416 can stably abut on the fifth extension surface 142 e, and the coupling state of the coupling member 400 coupled to the terminal module 10 can be stably maintained.The third extension arm 143 reinforces the rigidity of the first extension arm 141. In addition, the third extension arm 143 limits a length with which the coupling member 400 is inserted into the holding member 140.The third extension arm 143 is provided continuously with the first extension arm 141 at a predetermined angle. In the illustrated embodiment, the third extension arm 143 extends in the up / down direction perpendicular to the first extension arm 141.The third extension arm 143 is disposed to be spaced apart from the second extension arm 142. In the illustrated embodiment, the third extension arm 143 is disposed at the rear side of the first extension arm 141 and adjacent to the terminal body 100.A space formed surrounded by the first extension arm 141, the second extension arm 142, and the third extension arm 143 is defined as the element accommodating portion 144.The element accommodating portion 144 is a space that accommodates the coupling element 400. The element accommodating portion 144 is defined by being partially surrounded by the first extension arm 141, the second extension arm 142, and the third extension arm 143. The element accommodating portion 144 is open on a side facing the power electronic device 20, in particular on the front side in the illustrated embodiment. The coupling member 400 can be inserted into or removed from the member receiving portion 144 through one side.The element accommodating portion 144 is formed to have a height longer than the height of the coupling member 400, specifically, the length in the up / down direction. In addition, the element accommodating portion 144 may be formed to have a length longer than the length of the coupling element 400, specifically, the length in the forward / rearward direction. Therefore, in the case where the power electronic device 20 coupled to the terminal module 10 vibrates, the coupling member 400 can counteract a force applied by the vibration.The device accommodating portion 150 is a space that accommodates a part of the housing 200 of the power electronic device 20. In the illustrated embodiment, the device accommodating portion 150 accommodates left and right portions of the coupling member attaching / removing part 300 formed at a rear upper side of a second housing 220.The device accommodating portion 150 may be formed in accordance with a shape of the portion remaining on the rear upper side of the second housing 220 other than the coupling member attaching / removing part 300. In the illustrated embodiment, the device accommodating portion 150 extends in the left / right direction like the terminal body 100.The device accommodating portion 150 is open on a side facing the power electronic device 20, in particular, on the front side in the illustrated embodiment. The second housing 220 can be inserted into or removed from the device accommodating portion 150 through one side.The sides of the device accommodating portion 150 on the other side with respect to the height direction, particularly the upper and lower sides in the illustrated embodiment, are open. When the terminal module 10 or the power electronic device 20 coupled to the terminal module 10 swings in the upward / downward direction, the power electronic device 20 can counteract a force application, swinging through the sides of the device accommodating portion 150.The device accommodating portion 150 may be provided as a plurality of device accommodating portions 150. The plurality of device accommodating portions 150 may be spaced apart from each other. In the illustrated embodiment, ten device accommodating portions 150 are provided and arranged so as to be spaced apart from each other in the extending direction of the terminal body 100, particularly in the left / right direction.The plurality of holding members 140 are disposed between the plurality of device accommodating portions 150. In other words, the plurality of holding members 140 and the plurality of device accommodating portions 150 are alternately arranged in the longitudinal direction of the terminal body 100.In the device accommodating portion 150, the attachment hole 160 is formed.The fixing hole 160 is a space into which a fixing member 260 of the housing 200 is inserted. The attachment hole 160 is recessed in a surface of the terminal body 100 surrounding the device accommodating portion 150, particularly the front surface in the illustrated embodiment.The attachment hole 160 may correspond to the position of the attachment member 260. In the illustrated embodiment, the attachment hole 160 may be disposed in the device accommodating portion 150 and extend rightward.The attachment hole 160 may be formed in any shape into which the attachment member 260 is insertable and couplable thereto. In an embodiment in which the fastening member 260 is provided as a screw member, a screw thread may be formed on an inner circumferential surface of the fastening hole 160.When the mounting hole 160 and the mounting member 260 are coupled, the upper portion of the power electronic device 20 may be coupled to the terminal module 10 by a plurality of members, particularly the coupling member 400 and the mounting member 260. Therefore, it is possible to stably maintain the coupling state between the terminal module 10 and the power electronic device 20.The attachment hole 160 may be provided as a plurality of attachment holes 160. The plurality of attachment holes 160 may be disposed in a plurality of device accommodating portions 150. In the illustrated embodiment, ten attachment holes 160 may be formed and arranged for the respective ones of the device accommodating portions 150.3. Description of Power Electronic Device 20 According to Embodiment of the Present DisclosureFIGS. 1 to 2 show the power electronic device 20 according to the embodiment of the present disclosure.The power electronic device 20 may be provided in any form capable of accommodating various electric electronic devices therein and performing a predetermined function. In the embodiment, the power electronic device 20 may be provided as a programmable logic controller (PLC) and configured to control or monitor operation of another electrical device by means of which electrical conduction occurs. In the embodiment, electrical conduction may be from the power electronic device 20 to another external device.The power electronics device 20 is removably coupled to the connection module 10. A portion of the coupling may be achieved by the coupling element 400. Detailed description will be given below.The power electronics device 20 coupled to the connection module 10 can communicate with and electrically lead to the connection module 10. Thus, communication and electrical conduction between the external power source and the external load can be performed by the power electronic device 20.The power electronic device 20 may be provided as a plurality of power electronic devices 20. The plurality of power electronic devices 20 can perform communication with each other and electrical conduction therebetween. In the embodiment, a capacity of the entire electric device configured by the power electronic device 20 can be adjusted by adjusting the number of the power electronic devices 20 that perform communication with each other and electric conduction therebetween.Referring to FIGS. 6 to 8, the power electronic device 20 according to the illustrated embodiment includes the housing 200 and the coupling member attachment / detachment part 300. In addition, the power electronic device 20 further includes the coupling member 400 as shown in FIGS. 9 to 15. The coupling member 400 will be described separately.The housing 200 forms an outer shape of the power electronic device 20. In addition, the housing 200 is a portion in which the power electronic device 20 is couplable to the terminal module 10.A space is formed in the housing 200. Components such as a printed circuit board (PCB) and a capacitor necessary for performing a predetermined function of the power electronic device 20 may be accommodated in the space. Communication with and electrical conduction to the connection module 10 takes place through the space of the housing 200.In the illustrated embodiment, the housing 200 includes a first housing 210, the second housing 220, an operation part 230, the terminal member 240, a fixing bracket part 250, and the fixing member 260.The first housing 210 forms a part of the housing 200. In the embodiment shown, the first housing 210 forms a front side of the housing 200.The first housing 210 is coupled to the second housing 220. In the embodiment, the first housing 210 is removably couplable to the second housing 220. In the embodiment, the first housing 210 and the second housing 220 are easily separable, which can facilitate maintenance of the power electronic device 20.The space is formed in the first housing 210 such that the components are submergible. The first housing 210 may have any shape suitable for accommodating the components of the power electronic device 20 and suitable for being coupled to the second housing 220. In the illustrated embodiment, the first housing 210 has a quadrangular pillar shape in which a length in the front / rear direction is longer than a length in the left / right direction, and the quadrangular pillar shape has a height in the up / down direction.In this case, one side of the first housing 210 of the sides of the first housing 210 facing the second housing 220, particularly the rear side in the illustrated embodiment, may be open, and an inner space of the first housing 210 and an inner space of the second housing 220 may communicate with each other.In the embodiment shown, the first housing 210 comprises one or more first frames 211.The first frame 211 extends along an outer surface of the first housing 210. The first frame 211 may serve as a reinforcing rib configured to increase the rigidity of the first housing 210. In addition, the first frame 211 may serve as a cooling fin configured to dissipate heat generated by the components housed in the first housing 210.The first frame 211 may be provided as a plurality of first frames 211. The plurality of first frames 211 may be spaced apart from each other in the longitudinal direction of the first housing 210. In the illustrated embodiment, the plurality of first frames 211 may be disposed on the upper surface of the first housing 210 and spaced apart from each other in the forward / rearward direction.The second housing 220 forms another portion of the housing 200. In the embodiment shown, the second housing 220 forms the rear side of the housing 200.The second housing 220 is a portion in which the power electronic device 20 is couplable to the terminal module 10. In the illustrated embodiment, the upper and lower sides of a rear side of the second housing 220 are coupled to the terminal module 10. In addition, the terminal 240 disposed on a surface facing the terminal module 10 of the surfaces of the second housing 220, particularly the rear surface in the illustrated embodiment, is couplable to the slot member 120 and performs communication with and electric conduction to the slot member 120.On a side of the portion of the second housing 220 facing the terminal module 10, specifically, the rear upper side in the illustrated embodiment, the coupling member attaching / removing part 300 is formed, and the coupling member 400 is removably coupled to the coupling member attaching / removing part 300.The second housing 220 is coupled to the first housing 210. In one embodiment, the second housing 220 may be removably coupled to the first housing 210.In the second housing 220, the space is formed such that the components can be accommodated. The second housing 220 may have any shape suitable for accommodating the components of the power electronic device 20 and suitable for being coupled to the first housing 210. In the illustrated embodiment, the second housing 220 has a quadrangular pillar shape in which a length in the front / rear direction is longer than a length in the left / right direction, and the quadrangular pillar shape has a height in the up / down direction.In this case, the other side of the second housing 220 facing the first housing 210 among the sides of the second housing 220, particularly the front side in the illustrated embodiment, may be open, and the inner space of the second housing 220 and the inner space of the first housing 210 may communicate with each other.In the embodiment shown, the second housing 220 includes one or more second frames 221 and a top surface 222.The second frame 221 extends along an outer surface of the second housing 220. The second frame 221 may serve as a reinforcing rib configured to increase the rigidity of the second housing 220. In addition, the second frame 221 may serve as a cooling fin configured to dissipate heat generated by the components housed in the second housing 220.The second frame 221 may be provided as a plurality of second frames 221. The plurality of second frames 221 may be spaced apart from each other in the longitudinal direction of the second housing 220. In the illustrated embodiment, the plurality of second frames 221 may be disposed on the upper surface of the second housing 220 and spaced apart from each other in the forward / rearward direction.The upper surface 222 forms a surface of the surfaces of the second housing 220 facing the coupling member 400, particularly the upper surface in the embodiment shown. In the embodiment shown, the upper surface 222 of the second housing 220 is disposed rearward. The upper surface 222 is partially surrounded by the second frame 221.The coupling member attachment / detachment part 300 is formed on the upper surface 222. Further, the coupling member 400 coupled to the coupling member attachment / detachment part 300 abuts on the upper surface 222.The operation part 230 receives a control signal for controlling an operation of the power electronic device 20. Thus, the operator can easily approach the operation part 230 and trigger a control signal.The operation part 230 communicates with and electrically connects to the first housing 210 or the components and the terminal 240 accommodated in the inner space of the second housing 220.The operation part 230 may be configured in any form capable of receiving the control signal. In the embodiment shown, the actuation part 230 comprises a plurality of keys and a screen.The terminal element 240 is a portion in the power electronic device 20 through which communication with and electrical conduction to the terminal module 10 is made. The connector 240 is removably inserted into and coupled to the slot member 120. By means of the coupling described above, communication and electrical conduction can take place between the connection element 240 and the slot element 120.The terminal element 240 is arranged on a side facing the terminal module 10 of the sides of the second housing 220, in particular the rear side in the embodiment shown. The terminal element 240 is visible on the outside of the second housing 220.The connector 240 may correspond to the shape of the slot element 120. In the illustrated embodiment, the terminal member 240 extends in the height direction of the second housing 220, particularly in the up / down direction.The fixing bracket part 250 is a portion where the fixing member 260 is coupled to the second housing 220. The fixing bracket part 250 is provided continuously with the second frame 221 and is disposed so as to partially surround the upper surface 222. In the illustrated embodiment, the attachment bracket part 250 is disposed on the left side of the upper surface 222. The position of the fixing bracket part 250 may vary depending on the position of the fixing hole 160.The attachment bracket portion 250 may have any shape suitable for coupling to the attachment member 260. In the illustrated embodiment, the fixing bracket part 250 is formed to have a width in the left / right direction and a thickness in the front / rear direction.A space may be formed through the inside of the fixing bracket part 250 in the thickness direction, in particular, the front / rear direction, and the fixing member 260 may engage the space and be coupled to the space. In an embodiment in which the fastening element 260 is provided as a screw element, a screw thread may be formed on an inner circumferential surface surrounding the space.The fixing member 260 couples the second housing 220 to the terminal module 10. Additionally, the fastener 260 may couple the second housing 220 to the terminal module 10. The coupling between the second housing 220 and the terminal module 10 can be stably maintained by the fixing member 260.The fastening member 260 is coupled to the fastening bracket part 250 and the fastening hole 160. Specifically, the fastening member 260 penetrates the space formed in the fastening bracket part 250 and is inserted into and coupled to the fastening hole 160. In an embodiment, the fastener 260 may be screwed to the fastener support portion 250 and the fastener hole 160.The coupling member attachment / detachment part 300 is a portion in which the coupling member 400 is coupled to the housing 200, specifically, the second housing 220. The coupling member attachment / detachment part 300 is formed on one side of the second housing 220, specifically, the rear upper side in the illustrated embodiment.The coupling member attaching / removing part 300 is partially surrounded by the second frame 221 and the upper surface 222. In the illustrated embodiment, the front side, the left side, and the right side of the sides of the coupler attachment / removal part 300 are surrounded by the second frame 221, and the lower side of the coupler attachment / removal part 300 is surrounded by the upper surface 222. The remaining sides of the sides of the coupling member attaching / removing member 300, particularly the upper and rear sides in the illustrated embodiment, are open.The coupling member 400 may be coupled to or separated from the coupling member attachment / removal part 300 through the upper side. In addition, the power electronic device 20 may be coupled to or disconnected from the terminal module 10 through the rear side. In the embodiment, the coupling member attaching / removing part 300 may be integrally formed with the second housing 220.In the illustrated embodiment, the coupling member attaching / removing part 300 includes a coupling member accommodating portion 310, coupling opening portions 320, and a member guiding part 330.The coupling member accommodating portion 310 is a space that accommodates the coupling member 400. Further, in the coupler accommodating portion 310, another component of the coupler attaching / removing part 300 is accommodated. The coupling member accommodating portion 310 is defined by being partially surrounded by the second frame 221 and the upper surface 222.The coupling member accommodating portion 310 may be divided into a plurality of portions by the member guide part 330. In the illustrated embodiment, the coupler receiving portion 310 includes a first coupler receiving portion 311 formed at a front side thereof and a second coupler receiving portion 312 formed at a rear side thereof.The first coupling member accommodating portion 311 accommodates a part of a first coupling body 411 of the coupling member 400. The first coupling member accommodating portion 311 is defined by being surrounded by the second frame 221, the upper surface 222, and guide flat parts 331 and 332. An upper side of the first coupling member accommodating portion 311 is open.The first coupling member accommodating portion 311 communicates with a space formed in the second housing 220. Specifically, the first coupling member accommodating portion 311 and the space communicate with each other through a first coupling opening portion 321 formed through a part of the upper surface 222 surrounding the first coupling member accommodating portion 311.The second coupling member accommodating portion 312 accommodates another part of the first coupling body 411 of the coupling member 400, the second coupling body 412, and a support arm 440. The second coupling member accommodating portion 312 is defined by being surrounded by the second frame 221, the upper surface 222, and guide flat parts 331 and 332. An upper side and a rear side of the second coupling member accommodating portion 312 are open.The second coupling member accommodating portion 312 communicates with a space formed in the second housing 220. Specifically, the second coupling member accommodating portion 312 and the space communicate with each other through a second coupling opening portion 322 formed through the other part of the upper surface 222 surrounding the second coupling member accommodating portion 312.The second coupling element accommodating portion 312 may be formed to have a comparatively larger volume than the first coupling element accommodating portion 311. This is due to the fact that, as described below, a volume of another part of the first coupling body 411, the second coupling body 412, and the support arm 440 accommodated in the second coupling member accommodating portion 312 is larger than a volume of a part of the first coupling body 411 accommodated in the first coupling member accommodating portion 311.The coupling opening portion 320 is formed in the upper surface 222 and communicates with the inner space of the coupling member accommodating portion 310 and the inner space of the second housing 220. A coupling arm 420 of the coupling member 400 may be engaged with the coupling opening portion 320 and partially accommodated in the inner space of the second housing 220.The coupling opening portion 320 may be provided as a plurality of coupling opening portions 320. The plurality of coupling opening portions 320 may be respectively formed in the plurality of coupling member accommodating portions 310. In the illustrated embodiment, the coupling opening portion 320 includes the first coupling opening portion 321 formed in the first coupling member accommodating portion 311, and the second coupling opening portion 322 formed in the second coupling member accommodating portion 312.A first coupling arm 421 is removably and matingly coupled to the first coupling aperture portion 321. A second coupling arm 422 is removably and matingly coupled to the second coupling aperture portion 322. By the above-described coupling, the coupling arm 420 and the second housing 220 may be coupled by hook fitting.In the illustrated embodiment, the first coupling opening portion 321 and the second coupling opening portion 322 may each be formed to have a quadrangular cross section. The shapes of the first and second coupling opening portions 321 and 322 may vary depending on the shapes of the first and second coupling arms 421 and 422.The element guide part 330 guides the coupling element 400 such that the coupling element 400 is coupled to the coupling element attachment / detachment part 300 in a predetermined direction and at a predetermined position.The element guide part 330 is disposed on the coupling element accommodating portion 310. The element guide part 330 divides the coupling element accommodating portion 310 into a plurality of portions. In the illustrated embodiment, the element guide member 330 is disposed toward the front side of the coupling element accommodating portion 310, and is disposed so as to divide the coupling element accommodating portion 310 into the first coupling element accommodating portion 311 and the second coupling element accommodating portion 312.The element guide part 330 and the coupling element 400 may be coupled in a manner in which either the element guide part 330 is inserted into the coupling element 400 or the coupling element 400 is inserted into the element guide part 330. Here, the element guide part 330 and the coupling element 400 may be movably inserted and coupled in multiple positions.In the illustrated embodiment, the element guide member 330 includes a first guide flat member 331, a second guide flat member 332, and a rib receiving portion 333.The first guide flat 331 and the second guide flat 332 project from the upper surface 222. In the illustrated embodiment, the first guide sheet 331 and the second guide sheet 332 project upward.The first guide flat part 331 is inserted into and coupled to a first guide groove 431 aof the coupling member 400. The first guide flat part 331 extends in the extending direction of the first guide groove 431 a, particularly in the up / down direction in the illustrated embodiment. The first guide flat part 331 is movably inserted into the first guide groove 431 aso that the upward and downward movements of the coupling member 400 can be guided.The second guide flat part 332 is inserted into and coupled to a second guide groove 431 bof the coupling member 400. The second guide flat part 332 extends in the extending direction of the second guide groove 431 b, particularly in the up / down direction in the illustrated embodiment. The second guide flat member 332 is movably inserted into the second guide groove 431 bsuch that the upward and downward movements of the coupling member 400 can be guided.The first guide flat 331 and the second guide flat 332 extend in the lateral direction of the second housing 220, particularly in the left / right direction in the illustrated embodiment. In this case, the length of the first guide sheet 331 and the second guide sheet 332 in the lateral direction may be less than half a length of the coupling member accommodating portion 310.Thus, a predetermined space is formed between the first guide flat part 331 and the second guide flat part 332, and the first guide flat part 331 and the second guide flat part 332 are arranged in parallel. In the embodiment shown, the first guide flat part 331 is arranged to the left and the second guide flat part 332 is arranged to the right. Thus, both the left and right sides of the coupling member 400 can be moved up or down and coupled to the coupling member attachment / removal part 300 or separated from the coupling member attachment / removal part 300.The predetermined space formed between the first guide sheet 331 and the second guide sheet 332 is defined as the rib receiving portion 333.The rib receiving portion 333 is a space for receiving a guide rib 432 of the coupling member 400. The guide rib 432 may be removably inserted into the rib receiving portion 333.The rib receiving portion 333 is disposed between the first guide sheet 331 and the second guide sheet 332. The guide rib 432 accommodated in the rib accommodating portion 333 may be restricted at the left and right sides by the first guide flat 331 and the second guide flat 332.Therefore, the upward and downward movement of the coupling member 400 coupled to the coupling member attaching / removing part 300 is possible while the forward and rearward movement or the left and right movement is restricted. Therefore, it is possible to stably maintain the coupling state between the coupling member 400 and the coupling member attachment / detachment part 300.It is understood that the positions and shapes of the first guide sheet 331, the second guide sheet 332, and the rib receiving portion 333 may vary depending on the position and shape of a guide part 430 of the coupling member 400.4. Description of Coupling Member 400 According to Embodiment of the Present DisclosureReferring to FIG. 2, the power electronic device 20 according to the embodiment of the present disclosure includes the coupling member 400.The coupling member 400 is removably coupled to the coupling member attachment / detachment part 300 and the terminal module 10. In other words, the coupling element 400 removably couples the power electronics device 20 to the connection module 10.In the present description, it is assumed that the coupling element 400 is a component of the power electronic device 20. Alternatively, the coupling member 400 may be provided separately from the power electronic device 20.In the embodiment shown, the coupling element 400 may be provided as a single coupling element 400. Alternatively, the coupling member 400 may be provided as a plurality of coupling members 400, and the plurality of coupling members 400 may be removably coupled at a plurality of positions to the coupling member attachment / removal part 300 and the terminal module 10. In an embodiment, it is seen that the plurality of coupling member attachment / removal parts 300 are also provided.In an embodiment, the coupling member 400 may be coupled to the coupling member attachment / removal part 300 and the holding member 140 by a hook fit. Therefore, it is possible to easily couple the coupling member 400 to the coupling member attachment / detachment part 300 and the holding member 140, and stably maintain the coupling state.In addition, with the coupling member 400 according to an embodiment of the present disclosure, thanks to its structure and without having to have a separate elastic member, it is possible to counteract vibrations of the power electronic device 20 in the upward / downward direction. Thus, it is possible to reduce the manufacturing cost per unit, improve manufacturing efficiency, and easily perform maintenance.The components of the coupling member 400 described below may be integrally formed. Thus, it is possible to reduce the number of processes for manufacturing separate components and for coupling the components, and securely maintain the coupling between the components.In an embodiment, the coupling arm 420 of the components of the coupling member 400 described below may be made of a material of PC GF 10% (polycarbonate with 10% glass fiber). In addition, another component of the coupling member 400 may be made of a material of PC-ABS (polycarbonate-acrylonitrile-butadiene-styrene).In the embodiment, the coupling arm 420 may have a higher strength and tension than the other components of the coupling member 400.In the embodiment shown in FIGS. 9 to 15, the coupling member 400 includes the coupling body 410, the coupling arm 420, the guide part 430, and the support arm 440.The coupling body 410 forms a body of the coupling member 400. The coupling body 410 is a portion with which the coupling member 400 is accommodated in the coupling member attachment / detachment part 300. The coupling body 410 is provided continuously with some components of the coupling member 400. In addition, further components of the coupling element 400 are formed on the coupling body 410.In the illustrated embodiment, the coupling body 410 includes the first coupling body 411, the second coupling body 412, a pressing protrusion portion 413, a pressing cavity 414, a flat part receiving groove 415, and the coupling protrusion portion 416.The first coupling body 411 forms part of the coupling body 410, in particular the front side in the embodiment shown. The first coupling body 411 is partially accommodated in the first coupling member accommodating portion 311 and the second coupling member accommodating portion 312.The first coupling body 411 extends in the direction in which the coupling member 400 is coupled to or separated from the coupling member attachment / removal part 300, in particular, in the upward / downward direction in the illustrated embodiment.The first coupling body 411 may have any shape capable of being accommodated in the coupling member accommodating portion 310 and coupled to the member guide part 330. In the illustrated embodiment, the first coupling body 411 has a polygonal columnar shape having a height in the up / down direction and a width in the left / right direction.The first coupling body 411 may be divided into a plurality of sections. In the illustrated embodiment, the first coupling body 411 includes a first part configured to form a part of the front side and accommodated in the first coupling member accommodation portion 311, and a second part configured to form a part of the rear side and accommodated in the second coupling member accommodation portion 312.A guide groove 431 of the guide part 430 is disposed between the first part and the second part. In other words, the first coupling body 411 is divided into the first part and the second part by the guide groove 431 disposed in the first coupling body 411.Thus, the first part and the second part are arranged to face each other with the guide sheets 331 and 332 inserted into and interposed between the guide groove 431.One side of the first part of the first coupling body 411, in particular the lower side in the embodiment shown, is provided continuously with the first coupling arm 421 of the coupling arm 420. The other side of the first coupling body 411, in particular, the upper side in the illustrated embodiment, is provided continuously with the pressing protrusion portion 413. Another side of the second part of the first coupling body 411, in particular the rear side in the embodiment shown, is provided continuously with the second coupling body 412.In addition, the further side of the second part of the first coupling body 411, in particular the rear side in the embodiment shown, is provided continuously with the support arm 440.The second coupling body 412 forms a further part of the coupling body 410, in particular the rear side in the embodiment shown. The second coupling body 412 is submergible in the second coupling element receiving portion 312.The second coupling body 412 extends in the direction in which the coupling member 400 is coupled to or separated from the holding member 140, in particular in the forward / rearward direction in the illustrated embodiment.An end of the second coupling body 412 with respect to the extending direction that is directed toward the first coupling body 411, in particular, the front end in the illustrated embodiment, is provided continuously with the first coupling body 411. The other end of the second coupling body 412 with respect to the extending direction that is opposite to the first coupling body 411, specifically, the rear end in the illustrated embodiment is provided continuously with the coupling protrusion portion 416.The second coupling body 412 is provided continuously with the second coupling arm 422. The second coupling body 412 holds the second coupling arm 422 from above.The second coupling body 412 may have any shape capable of being accommodated in the second coupling member accommodating portion 312 and holding the second coupling arm 422. In the illustrated embodiment, the second coupling body 412 has a flat shape extending in the front / rear direction and having a width in the left / right direction and a thickness in the up / down direction.In this case, a length of the second coupling body 412 in the transverse direction, more specifically, a length in the left / right direction may be shorter than a length of the first coupling body 411 in the transverse direction.The second coupling body 412 is surrounded by one or more support arms 440. Thus, as described below, the second coupling body 412 is disposed between and spaced apart from the support arms 441 and 442 of the pair of support arms 440.The pressing protrusion portion 413 is formed at an upper side of the first coupling body 411 and protrudes. The operator can couple the coupling member 400 to the coupling member attachment / detachment part 300 by pressing the pressing protrusion portion 413. As described above, in the embodiment in which the coupling member 400 and the coupling member attachment / removal member 300 are coupled by a hook fit, an external force for the hook fit can be applied to the pressing protrusion portion 413.When the power electronic device 20 is coupled to the terminal module 10, the pressing protrusion portion 413 also protrudes outward. The operator can press the pressing protrusion portion 413, release the coupling state between the holding member 140 and the coupling arm 420, and separate the power electronic device 20 from the terminal module 10.The pressing protrusion portion 413 is provided continuously with the first coupling body 411. In the illustrated embodiment, the front lower side of the pressing protrusion portion 413 is provided continuously with the first part of the first coupling body 411, and the rear lower side of the pressing protrusion portion 413 is provided continuously with the second part of the first coupling body 411. The pressing protrusion portion 413 is disposed so as to cover the guide part 430 interposed between the first part and the second part of the first coupling body 411 from above.The pressing protrusion portion 413 may be formed to have the same length and width as the first coupling body 411. A grip recess 413 ais recessed on the upper side of the pressing protrusion portion 413, thereby improving the processing cost of the pressing protrusion portion 413. In addition, a frictional force on the upper side of the pressing protrusion portion 413 is increased by the recessed grip 413 asuch that the process of coupling the coupling member 400 and the coupling member attachment / detachment part 300 and the process of separating the power electronic device 20 and the terminal module 10 can be easily performed.The pressing depression 414 is formed recessed in the coupling protrusion portion 416. In the case where the coupling member 400 is to be separated from the coupling member attachment / removal part 300, the coupling protrusion portion 416 is pressed toward the first coupling body 411, specifically toward the front side in the illustrated embodiment. In this case, since the pressure well 414 is formed, a frictional force generated on the surface of the coupling protrusion portion 416 can increase, and an amount of external force to be applied by the operator can be reduced.Thus, by the pressing depression 414, a frictional force of the coupling protrusion portion 416 increases and allows the operator to easily grasp and press the coupling protrusion portion 416.The pressure depression 414 is formed recessed in a surface of the coupling projection portion 416 opposite the first coupling body 411, in particular the rear surface in the embodiment shown. As described below, one surface forms the second support surface 416 b.The flat part accommodation groove 415 is a space formed in the first coupling body 411. The first guide flat 331 and the second guide flat 332 of the element guide 330 are detachably accommodated in the flat accommodating groove 415.The flat part accommodation groove 415 is partially surrounded by the first coupling body 411 and the pressing protrusion portion 413. In the embodiment shown, a front side of the flat part receiving groove 415 is surrounded by the first part of the first coupling body 411, and a rear side of the flat part receiving groove 415 is surrounded by the second part of the first coupling body 411. An upper side of the flat part accommodating groove 415 is covered by the pressing protrusion portion 413.A lower side of the flat part accommodating groove 415 is open, and the first guide flat part 331 and the second guide flat part 332 may be accommodated in the flat part accommodating groove 415 in a pull-out manner. An outer side of the flat part accommodating groove 415 with respect to the lateral direction, in particular, the left and right sides in the illustrated embodiment communicates with the outer side through the first guide groove 431 aand the second guide groove 431 b.Thus, it is apparent that the guide flats 331 and 332 housed in the flat-part housing groove 415 are also movably inserted into the guide grooves 431 aand 431 b.The guide rib 432 is disposed in the flat-part receiving groove 415. The guide rib 432 is inserted into the rib receiving portion 333 formed between the plurality of guide flat parts 331 and 332.The coupling protrusion portion 416 is a portion in which the coupling member 400 is coupled to the holding member 140 of the terminal module 10. The coupling protrusion portion 416 may be coupled to the second extension arm 142 of the retaining member 140 by a hook fit.The coupling protrusion portion 416 is provided continuously with the second coupling body 412. Specifically, the coupling protrusion portion 416 is provided continuously with the other side at the end of the second coupling body 412 with respect to the extending direction that is opposite to the first coupling body 411, specifically, at the rear end in the illustrated embodiment.The coupling protrusion portion 416 is formed to protrude from the second coupling body 412. By the protrusion, it is possible to couple the coupling protrusion portion 416 to the second extension arm 142 by means of a hook fit. In the illustrated embodiment, the coupling protrusion portion 416 protrudes upward from the second coupling body 412.The coupling protrusion portion 416 may be formed to have the same length and width as the second coupling body 412. In other words, the coupling protrusion portion 416 is formed to have a width smaller than a width of the first coupling body 411. Therefore, the coupling protrusion portion 416 is disposed between the plurality of support arms 440 and spaced apart from the support arms 440.The coupling protrusion portion 416 may have multiple surfaces. The surfaces may be continuous and formed at a predetermined angle to each other. In the embodiment shown, the coupling protrusion portion 416 includes the first support surface 416 aand the second support surface 416 b.The first bearing surface 416 aconstitutes a surface of the coupling projection portion 416 facing the first coupling body 411, in particular the front surface in the embodiment shown. The first support surface 416 ais provided continuously with the second coupling body 412.The first support surface 416 aextends at a predetermined angle to the second coupling body 412. In the embodiment shown, the first support surface 416a slopes in a direction away from the first coupling body 411, forming an obtuse angle with the top surface of the second coupling body 412. In other words, the first support surface 416 aextends obliquely from the rear upper side toward the front lower side.When the coupling member 400 is coupled to the holding member 140, the first support surface 416 acomes in contact with the fifth extension surface 142 eof the second extension arm 142. The first support surface 416 ais thus brought into contact with and abuts the fifth extension surface 142 e. To this end, the first support surface 416 aand the fifth extension surface 142 emay be inclined to have the same inclination.The first support surface 416 ais provided continuously with the second support surface 416 bby the upper surface of the coupling protrusion portion 416.The second support surface 416 bconstitutes the other surface of the coupling protrusion portion 416 opposite the first coupling body 411, in particular the rear surface in the embodiment shown. The second support surface 416 bis provided continuously with the first support surface 416 a.The second support surface 416 bextends at a predetermined angle to the upper surface of the coupling protrusion portion 416. In the embodiment shown, the second support surface 416 bruns obliquely away from the first coupling body 411, forming an obtuse angle with the upper surface of the coupling protrusion portion 416. In other words, the second support surface 416 bextends obliquely from the rear lower side toward the front upper side.When the coupling member 400 moves toward the holding member 140, the second support surface 416 bcomes in contact with the third extension surface 142 cof the second extension arm 142. While the movement of the coupling member 400 is being performed, the second extension arm 142 moves along the second support surface 416 btoward the upper side of the coupling protrusion portion 416 and engages the space between the first support surface 416 aand the first coupling body 411. Thus, it is possible to couple the coupling member 400 and the holding member 140 by means of a hook fit.To this end, the second support surface 416 band the third extension surface 142 cmay be formed to have the same inclination.The coupling arm 420 is a portion where the coupling member 400 is coupled to the coupling member attachment / detachment part 300. The coupling arm 420 may be removably coupled to the coupling member attaching / removing part 300. Thus, it is possible to couple the coupling member 400 and the housing 200 by means of a hook fit.The coupling arm 420 is provided continuously with the coupling body 410. The coupling arm 420 is provided continuously with one side of the sides of the coupling body 410 facing the coupling member attaching / removing part 300, more specifically, continuously the lower end thereof in the illustrated embodiment.The coupling arm 420 may be provided as a plurality of coupling arms 420. The plurality of coupling arms 420 are provided continuously with the first coupling body 411 and the second coupling body 412, engage with, and are coupled to the plurality of coupling opening portions 320.In the embodiment shown, the coupling arm 420 comprises the first coupling arm 421 and the second coupling arm 422.The first coupling arm 421 is provided continuously with the first coupling body 411, engages with and is coupled to the first coupling opening portion 321. The first coupling arm 421 is removably coupled to an inner upper surface of the second housing 220 of an outer edge of the first coupling opening portion 321.The first coupling arm 421 is provided continuously with the first part, in particular the front portion, of the first coupling body 411. The first coupling arm 421 extends in the height direction of the first coupling body 411, in the illustrated embodiment, particularly in the up / down direction.The first coupling arm 421 may be formed to have a width smaller than a width of the first coupling body 411. In addition, the first coupling arm 421 may be formed to have a length equal to or less than a length in the transverse direction, in particular, the left / right direction of the first coupling opening portion 321.In the embodiment shown, the first coupling arm 421 comprises a first coupling extension portion 421 aand a first coupling protrusion 421 b.The first coupling extension portion 421 ais a portion in which the first coupling arm 421 is provided continuously with the first coupling body 411. The first coupling extension portion 421 aengages with the first coupling opening portion 321.The first coupling extension portion 421 aextends downward from the lower end of the first coupling body 411. An end of the first coupling extension portion 421 awith respect to the extending direction, in particular, the upper end in the illustrated embodiment is provided continuously with the first part of the first coupling body 411. The first coupling protrusion 421 bis disposed at the other end of the first coupling extension portion 421 awith respect to the extending direction, particularly at the lower end in the illustrated embodiment.The first coupling protrusion 421 bis a portion where the first coupling arm 421 is coupled to the coupling member attachment / detachment part 300 by a hook fit. The first coupling protrusion 421 bis formed at the other end of the first coupling extension portion 421 a, in particular, at the lower end in the illustrated embodiment.The first coupling protrusion 421 bprotrudes outward from the first coupling extension portion 421 a. In the illustrated embodiment, the first coupling protrusion 421 bprotrudes forward. In this case, the first coupling protrusion 421 bincludes a first part extending horizontally and a second part provided continuously with the first part and obliquely downward toward the first coupling extension portion 421 b.The first coupling arm 421 is pushed inward, in particular toward the rear side, in the embodiment shown, and the first coupling arm 421 can engage with the first coupling opening portion 321. In this case, the first part may come into contact with the outer edge of the first coupling opening portion 321 and be pushed rearward.When the first coupling protrusion 421 bis fully engaged with the first coupling hole portion 321, the pressed state is released such that the first coupling arm 421 can move forward. In this case, the second part comes into contact with a surface of the outer edge of the first coupling opening portion 321 disposed in the second housing 220. Thus, the first coupling arm 421 and the coupling member attachment / detachment part 300 are fully coupled by a hook fit.The second coupling arm 422 is provided continuously with the second coupling body 412, engages with and is coupled to the second coupling opening portion 322. The second coupling arm 422 is removably coupled to an inner upper surface of the second housing 220 of an outer edge of the second coupling opening portion 322.The second coupling arm 422 is provided continuously with a lower end of the second coupling body 412. The second coupling arm 422 extends in the height direction of the second coupling body 412, in particular in the up / down direction in the illustrated embodiment.The second coupling arm 422 may be formed to have a width smaller than a width of the second coupling body 412. In the illustrated embodiment, the second coupling arm 422 may be formed to have a length equal to or less than a length in the lateral direction, in particular, the left / right direction, of the second coupling opening portion 322.In the embodiment shown, the second coupling arm 422 includes a second coupling extension portion 422 aand a second coupling protrusion 422 b.The second coupling extension portion 422 ais a portion in which the second coupling arm 422 is provided continuously with the second coupling body 412. The second coupling extension portion 422 aengages with the second coupling opening portion 322.The second coupling extension portion 422 aextends downward from the lower end of the second coupling body 412. One end of the second coupling extension portion 422 awith respect to the extending direction, specifically, the upper end in the illustrated embodiment is provided continuously with the second coupling body 412. The second coupling protrusion 422 bis disposed at the other end of the second coupling extension portion 422 awith respect to the extending direction, particularly at the lower end in the illustrated embodiment.The second coupling protrusion 422 bis a portion where the second coupling arm 422 is coupled to the coupling member attachment / detachment part 300 by a hook fit. The second coupling protrusion 422 bis formed at the other end of the second coupling extension portion 422 a, particularly at the lower end in the illustrated embodiment.The second coupling protrusion 422 bprotrudes outward from the second coupling extension portion 422 a. In the illustrated embodiment, the second coupling protrusion 422 bprotrudes rearward. Here, the second coupling protrusion 422 bincludes a first part extending horizontally and a second part provided continuously with the first part and obliquely extending downward toward the second coupling extension portion 422 a.The second coupling arm 422 is pushed inward, in particular toward the front side, in the illustrated embodiment, and the second coupling arm 422 can engage with the second coupling hole portion 322. Here, the second part may come into contact with the outer edge of the second coupling opening portion 322 and be pushed forward.When the second coupling protrusion 422 bengages completely with the second coupling hole portion 322, the pressed state is released such that the second coupling arm 422 can move forward. In this case, the second part comes into contact with a surface of the outer edge of the second coupling opening portion 322 disposed in the second housing 220. Thus, the second coupling arm 422 and the coupling member attachment / detachment part 300 are fully coupled by a hook fit.Therefore, the coupling member 400 may be coupled to the coupling member attachment / detachment part 300 by a hook fit through the plurality of coupling arms 420. In this case, due to the shape of the coupling protrusions 421 band 422 b, the operator can couple the coupling member 400 and the coupling member attachment / removal part 300 only by pressing the coupling member 400 against the coupling member attachment / removal part 300.Further, the coupling member 400 and the coupling member attachment / detachment part 300 are coupled by a hook fit due to the shape of the coupling protrusions 421 band 422 b. Therefore, it is possible to stably maintain the coupling state between the coupling member 400 and the coupling member attachment / detachment part 300 as long as no external force is applied in a predetermined direction.In addition, the first coupling arm 421 and the second coupling arm 422 may be formed symmetrically in the forward / rearward direction. Therefore, the processing amount of the coupling member 400 can be improved. In addition, the coupling member 400 and the housing 200 are easily couplable or separable. Further, the coupling member 400 coupled to the housing 200 does not wobble in a direction, in particular, not in the forward / rearward direction in which the first coupling arm 421 and the second coupling arm 422 are spaced apart from each other.The guide part 430 guides the coupling member 400 such that the coupling member 400 is coupled to the coupling member attachment / detachment part 300 in a predetermined direction. The guide part 430 is movably coupled to the element guide part 330 of the coupling element attachment / detachment part 300. The coupling member 400 and the coupling member attachment / detachment part 300 may be coupled to each other or separated from each other in the state where the guide part 430 and the member guide part 330 are coupled.The guide part 430 is provided continuously with the coupling body 410. Specifically, the guide part 430 is disposed on a side of the sides of the coupling body 410 facing the coupling member attachment / detachment part 300, specifically, on the lower side in the illustrated embodiment. The guide part 430 is disposed between the first part (specifically, the front portion) and the second part (specifically, the rear portion) of the first coupling body 411.In the illustrated embodiment, the guide part 430 includes the guide groove 431 and the guide rib 432.The guide groove 431 is a space into which the guide flat parts 331 and 332 of the element guide part 330 are movably inserted. The guide groove 431 extends in the extending direction of the guide flat parts 331 and 332, particularly in the up / down direction in the illustrated embodiment.The guide groove 431 is formed in the first coupling body 411. In the illustrated embodiment, the guide groove 431 is formed in the lateral direction of the first coupling body 411, more specifically, on the left and right sides. The guide groove 431 is formed in the left and right surfaces of the first coupling body 411.The guide groove 431 communicates with the flat-part receiving groove 415. One of the guide sheets 331 and 332 may be accommodated in the sheet accommodating groove 415, and the other of the guide sheets 331 and 332 may be movably inserted in the guide groove 431.The guide groove 431 may be formed to have a length equal to or greater than a thickness of each of the guide sheets 331 and 332, particularly, the length in the forward / rearward direction in the illustrated embodiment.The guide groove 431 may be provided as a plurality of guide grooves 431. The plurality of guide grooves 431 may be formed at different positions on the first coupling body 411 and movably accommodate the different guide flats 331 and 332.In the embodiment shown, the guide groove 431 comprises the first guide groove 431 aand the second guide groove 431 b.The first guide groove 431 ais formed in the left surface of the first coupling body 411. The first guide flat part 331 is inserted into the first guide groove 431 aand movably coupled thereto.The second guide groove 431 bis formed in the right surface of the first coupling body 411. The second guide flat member 332 is inserted into and movably coupled to the second guide groove 431 b.The guide rib 432 is formed between the first guide groove 431 aand the second guide groove 431 b.The guide rib 432 is movably inserted into the rib receiving portion 333 of the element guide 330. The guide rib 432 extends in the extending direction of the guide flat parts 331 and 332, particularly in the up / down direction in the illustrated embodiment.The guide rib 432 is provided continuously with the first coupling body 411. In the illustrated embodiment, the guide rib 432 protrudes from the front surface of the second part of the first coupling body 411 toward the front side.The guide rib 432 may have a height that is less than a height of the first coupling body 411. In this case, an end of the guide rib 432 may be disposed at the same height as the lower end of the second part of the first coupling body 411 with respect to the extending direction, particularly the lower end in the illustrated embodiment.Therefore, it is possible that the second part of the first coupling body 411 and the guide rib 432 are arranged together on the upper surface portion 222 surrounding the second coupling opening portion 322. Therefore, it is possible to stably maintain the coupling state between the coupling member 400 and the coupling member attachment / detachment part 300 even in the case where the power electronic device 20 swings in the up / down direction.The guide rib 432 may be formed to have a thickness equal to or less than a width of the rib receiving portion 333. Therefore, the guide rib 432 can be easily inserted into or removed from the rib receiving portion 333.The support arm 440 provides a restoring force to the coupling element 400. In the case that the coupling member 400 and the power electronic device 20 coupled to the coupling member 400 swing in the upward / downward direction, the support arm 440 can counteract a force applied by the vibration by deforming by the received restoring force.Therefore, it is possible to stably maintain the coupling state between the power electronic device 20 and the terminal module 10 even when a separate elastic member such as a spring is not provided on the coupling member 400.When the coupling member 400 is coupled to the coupling member attachment / detachment part 300, the support arm 440 extends downward from the lower end of the coupling body 410. In other words, in a state in which no external force is applied, the coupling member 400 abuts the support arm 440 on the upper surface 222, with the coupling body 410 spaced apart from the upper surface 222.In the case where vibration occurs in the up / down direction in this state, the support arm 440 may deform, the coupling member 400 may lower, and the coupling body 410 may come into contact with the upper surface 222. When the occurrence of the vibration ceases, the support arm 440 may recover with the elastic force stored by deformation, and the coupling body 410 is spaced apart from the upper surface 222 again.Thus, the support arm 440 can counteract the vibration even when the terminal module 10 and the power electronic device 20 coupled to the terminal module 10 vibrate in the upward / downward direction. Therefore, it is possible to prevent damage to the terminal module 10 and the power electronic device 20. Further, it is possible to prevent damage to the coupling member 400 coupled to the terminal module 10 and the power electronic device 20.The support arm 440 is provided continuously with the coupling body 410. Specifically, the support arm 440 is provided continuously with the second part (specifically, the rear portion) of the first coupling body 411. The support arm 440 extends from the rear surface of the second part of the first coupling body 411 toward the rear lower side.One end of the support arm 440 with respect to the extending direction, in particular, the front upper end in the illustrated embodiment is provided continuously with the second part of the first coupling body 411. The other end of the support arm 440 with respect to the extending direction, in particular, the rear lower end in the illustrated embodiment is disposed below the lower end of the first coupling body 411 and the lower end of the second coupling body 412. With the above-described structure, the support arm 440 can elastically support the coupling member 400.The support arm 440 is disposed to be spaced apart from the second coupling body 412 and the coupling protrusion portion 416. The support arm 440 is provided outside in the lateral direction and partially surrounds the second coupling body 412 and the coupling protrusion portion 416.The support arm 440 may be provided as a plurality of support arms 440. The plurality of support arms 440 may be coupled to the coupling body 410 at different positions and come into contact with the upper surface 222 at different positions, thereby making it possible to elastically support the coupling member 400. In the embodiment shown, the support arms 440 are provided as two support arms 440, which comprise a first support arm 441 and a second support arm 442.The first support arm 441 and the second support arm 442 are spaced apart from and face each other with the second coupling body 412 and the coupling protrusion portion 416 interposed therebetween. In the embodiment, the first support arm 441 and the second support arm 442 may have the same length.The first support arm 441 is provided continuously with a rear left portion of the second part of the first coupling body 411. The first support arm 441 surrounds the second coupling body 412 and the coupling protrusion portion 416 on the left side and obliquely extends downward. The lower end of the first support arm 441 may be disposed below the lower end of the coupling body 410.The second support arm 442 is provided continuously with a rear right portion of the second part of the first coupling body 411. The second support arm 442 surrounds the second coupling body 412 and the coupling protrusion portion 416 on the right side and obliquely extends downward. The lower end of the second support arm 442 may be disposed below the lower end of the coupling body 410.5. Description of the Method for Coupling the Terminal Module 10 and the Power Electronic Device 20 According to an Embodiment of the Present DisclosureThe power electronic device 20 according to the embodiment of the present disclosure includes the coupling member 400. The coupling member 400 is removably coupled to the coupling member attachment / detachment part 300 of the power electronic device 20. Therefore, the coupling element 400 is also removably coupled to the holding element 140 of the connection module 10. In an embodiment, the coupling member 400 may be coupled to the coupling member attachment / removal part 300 and the holding member 140 by a hook fit.In the case of the power electronics device according to the prior art, the power electronics device is directly coupled to the connection module by means of the components integrated into the power electronics device. For this reason, there is a problem that even if only one component is damaged, the entire cover of the power electronic device needs to be replaced.Further, the power electronic device according to the related art is generally configured such that various devices accommodated in the power electronic device are integrated into the cover. For this reason, there is a problem that the internal components must be disassembled additionally when the cover is replaced.For this reason, an excessive amount of time and cost are required for performing maintenance work on the component for coupling the power electronic device and the connector. In addition, there is a possibility that the electrical components may be inadvertently damaged during the process of disassembling the electrical components that are not to be subjected to maintenance.In contrast, when the coupling member 400 according to the embodiment of the present disclosure is damaged, the maintenance operation can be completed by replacing only the coupling member 400. Therefore, the time and cost for maintenance can be reduced, and the coupling state between the sensitive electrical components is not destroyed, so that the durability and the reliability of the power electronic device 20 are improved.Furthermore, the coupling element 400 is elastically mounted on the support arm 440. Therefore, the coupling member 400 can counteract the vibrations generated by the operation of the power electronic device 20 and the terminal module 10. Thus, it is possible to prevent the vibrations from damaging the components of the power electronic device 20. Further, since it is not necessary to provide a separate elastic member so as to oppose the vibrations, the assembly workability can be improved and the manufacturing cost can be reduced.Next, the method of coupling the power electronic device 20 and the terminal module 10 according to the embodiment of the present disclosure and the coupling state will be described with reference to FIGS. 16 to 23.(1) Description of the Method for Coupling the Power Electronic Device 20 and the Coupling Member 400 According to an Embodiment of the Present DisclosureFIGS. 16 to 20 illustrate the method of coupling the coupling member 400 to the coupling member attachment / detachment part 300 of the power electronic device 20 according to the embodiment of the present disclosure, and show the coupling state.Referring to FIG. 16, the coupling member 400 is moved from top to bottom and coupled to the coupling member attachment / detachment part 300. As described above, the front side, the left side, and the right side of the coupler attachment / removal part 300 are surrounded by the second frame 221, the lower side of the coupler attachment / removal part 300 is surrounded by the upper surface 222, and the upper and rear sides of the coupler attachment / removal part 300 are open. The coupling member 400 is coupled to the coupling member attachment / detachment part 300 via the upper side.FIG. 17 illustrates the method of coupling the coupling member 400 to the coupling member attachment / detachment part 300.Referring to FIG. 17A, the coupling member 400 is disposed above the coupling member attachment / removal part 300. In this case, the first coupling arm 421 is disposed over the first coupling opening portion 321, and the second coupling arm 422 is disposed over the second coupling opening portion 322.Referring to FIG. 17B, the second coupling arm 422 is first inserted into the second coupling hole portion 322. In the illustrated embodiment, the coupling member 400 is rotated clockwise, and the second rear side coupling arm 422 is first inserted into the second rear side coupling opening portion 322.Referring to FIG. 17C, the first coupling arm 421 is inserted into the first coupling hole portion 321. In the illustrated embodiment, the coupling member 400 is rotated counterclockwise, and the first coupling arm 421 on the front side is inserted into the first coupling opening portion 321 on the front side.In this case, the element guide part 330 and the guide part 430 may also be movably coupled such that the precise coupling between the coupling element 400 and the coupling element attachment / detachment part 300 is possible by means of guidance.FIGS. 18 to 20 show that the coupling member 400 is coupled to the coupling member attachment / detachment part 300.First, the first coupling arm 421 is engaged with the first coupling hole portion 321, and the first coupling protrusion 421 bis coupled by a hook fit on the front side of the upper inner surface of the second housing 220. Similarly, the second coupling arm 422 engages with the second coupling hole portion 322, and the second coupling protrusion 422 bis coupled by a hook fit on the rear side of the upper inner surface of the second housing 220.Thus, it is possible to prevent the coupling member 400 and the coupling member attachment / detachment part 300 from being separated unintentionally.The first guide flat 331 and the second guide flat 332 are movably inserted into the first guide groove 431 aand the second guide groove 431 bin the up / down direction. In addition, the guide rib 432 is movably inserted into the rib receiving portion 333 in the up / down direction.Thus, the forward / backward movement and the left / right movement of the coupling member 400 are restricted by the coupling between the member guide part 330 and the guide part 430.Here, the coupling member 400 elastically abuts with the support arm 440 contacting the upper surface 222. That is, the remaining components of the components of the coupling member 400 are spaced apart from the upper surface 222 except for the lower end of the support arm 440.Therefore, even in the case where the power electronic device 20 vibrates, it is possible to counteract the force applied by the vibrations by transmitting the generated elastic force to the support arm 440.(2) Description of the Method for Coupling the Terminal Module 10 and the Power Electronic Device 20 According to an Embodiment of the Present DisclosureFIGS. 21 to 23 show the method of coupling the power electronic device 20 and the terminal module 10 according to an embodiment of the present disclosure and the coupling state. In the embodiment shown, it is understood that the coupling element 400 is removably coupled to the power electronics device 20.Referring to FIG. 21, the power electronic device 20 is moved backward from the front side and coupled to the terminal module 10. The protrusion (not shown) formed on the lower side of the second housing 220 in this case is disposed to overlap the base groove 131 in the front / rear direction, the terminal member 240 is disposed to overlap the slot member 120 in the front / rear direction, the attachment support part 250 is disposed to overlap the attachment hole 160 in the front / rear direction, and the coupling member 400 is disposed to overlap the holding member 140 in the front / rear direction.FIG. 22 shows the order in which the power electronic device 20 is coupled to the terminal module 10. In the illustrated embodiment, the power electronic device 20 is rotated counterclockwise, and the protrusion (not shown) formed on the lower side of the second housing 220 is first inserted into the base groove 131 ( 1 in FIG. 22 ).Next, the power electronic device 20 is rotated clockwise, the connector 240 is coupled to the slot 120 and the coupler 400 is coupled to the holder 140 (2 in FIG. 22 ). Further, a method of coupling the fastening member 260 to the fastening bracket part 250 and the fastening hole 160 may be adopted, but this is not illustrated.FIG. 23 shows a state in which the power electronic device 20 is coupled to the terminal module 10.The coupling protrusion portion 416 moves rearward, pushing the second extension arm 142 upward. In this case, the third extension surface 142 cis contacted with the second support surface 416 band moves upward along the second support surface 416 b.When the movement of the power electronic device 20 is completed, the second extension arm 142 is accommodated in the space formed between the coupling protrusion portion 416 and the first coupling body 411. In this case, the fifth extension surface 142 eis in contact with the first support surface 416 a.In this state, the holding member 140 presses the coupling member 400 downward by its shape. In addition, the coupling member 400 is pushed upward by the elastic force applied by the support arm 440. Thus, the power electronic device 20 and the terminal module 10 can be stably coupled by means of a hook fit.In this state, in the case where the power electronic device 20 and the terminal module 10 are to be separated, pressing the pressing protrusion portion 413, the support arm 440 is compressed, and the coupling member 400 is moved downward. Thus, when the holding member 140 and the coupling member 400 are released, the power electronic device 20 can be moved forward and disconnected from the terminal module 10.Although the embodiments of the present disclosure have been described, the technical spirit of the present disclosure is not limited to the embodiments shown in the present specification, and those skilled in the art who understands the technical spirit of the present disclosure can easily devised other embodiments by adding, modifying, or omitting constituent elements within the same technical spirit and the scope of the present disclosure, and such an embodiment is to be understood as falling within the technical scope of the present disclosure.10 Terminal module 100 Terminal body 120 Slot member 131 Base groove 141 First extension arm 142 aFirst extension surface 142 cThird extension surface 142 e Fünfte extension surface 144 Member receiving portion 160 Mounting hole 210 First housing 220 Second housing 222 Upper surface 240 Terminal member 260 Mounting member 300 Coupling member attachment / removal part 310 Coupling member receiving portion 311 First coupling member receiving portion 312 Second coupling member receiving portion 20 Power electronic device 110 Electric conductor member 130 Support base 140 Holding member 142 Second extension arm 142 bSecond extension surface 142 d Vierte extension surface 143 Third extension arm 150 Device receiving portion 200 Housing 211 First frame 221 Second frame 230 Operation part 250 Mounting bracket part 320 Coupling opening portion 321 First coupling opening portion 322 second coupling opening portion 330 element guide part 332 second guide sheet 400 coupling element 411 first coupling body 413 pressing protrusion portion 414 pressing depression 416 coupling protrusion portion 416 bsecond support surface 421 first coupling arm 421 afirst coupling extension portion 421 bfirst coupling protrusion 422 asecond coupling extension portion 430 guide part 431 afirst guide groove 432 guide rib 441 first support arm 331 first guide sheet 333 rib receiving portion 410 coupling body 412 second coupling body 413 arip depression 415 sheet receiving groove 416 afirst support surface 420 coupling arm 422 second coupling arm 422 bsecond coupling protrusion 431 guide groove 431 bsecond guide groove 440 support arm 442 second support armReferences included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedKR 10 1 342 513 B1 [0011, 0015]KR 10 1 011 034 B1 [0013, 0015]

Claims

A coupling member removably coupled to an external power electronic device, the coupling member comprising: a coupling body; and a coupling arm extending from a side of the coupling body with respect to a height direction and removably coupled to the power electronic device, wherein the coupling arm comprises: a coupling extension portion extending from a side of the coupling body to inside of the power electronic device; and a coupling protrusion protruding from an end of the coupling extension portion and coupled to an inner surface of the power electronic device, and wherein the coupling arm is provided as a plurality of coupling arms, and the plurality of coupling arms are arranged so as to be spaced apart from each other in a direction.The coupling member according to claim 1, wherein the plurality of coupling arms include: a first coupling arm disposed toward one side of the coupling body with respect to a longitudinal direction; and a second coupling arm disposed toward the other side of the coupling body opposite to the one side with respect to the longitudinal direction.The coupling member according to claim 2, wherein a first coupling protrusion of the first coupling arm protrudes to one side with respect to the longitudinal direction and a second coupling protrusion of the second coupling arm protrudes to the other side with respect to the longitudinal direction.The coupling member of claim 1, wherein the coupling arm and the power electronics device are coupled by hook-fitting.The coupling member according to claim 1, comprising: a support arm extending to be inclined with respect to the longitudinal direction from one side of the coupling body toward the power electronic device, and having an end with respect to its extending direction disposed to protrude beyond an end of one side of the coupling body with respect to its height direction, wherein the support arm is configured to elastically support the coupling body.The coupling member according to claim 5, wherein the support arm comprises: a first support arm disposed toward one side of the coupling body with respect to a transverse direction; and a second support arm disposed to be spaced apart from the first support arm and disposed toward the other side of the coupling body with respect to the transverse direction.The coupling member according to claim 1, comprising: a plurality of guide grooves formed in a side surface of the coupling body with respect to a transverse direction and configured to movably receive a guide flat provided in the power electronic device; and a guide rib disposed between the plurality of guide grooves, extending from the inside of the coupling body in the height direction of the coupling body, and inserted into a rib receiving portion provided in the power electronic device.The coupling member according to claim 1, wherein the coupling body comprises: a first coupling body extending in the height direction; a second coupling body provided continuously with one side of the first coupling body with respect to a longitudinal direction and extending in the longitudinal direction; and a coupling protrusion portion disposed at one end of the second coupling body and protruding toward the other side with respect to the height direction.The coupling member according to claim 8, wherein the coupling protrusion portion comprises: a first support surface inclined to the other side with respect to the height direction; and a second support surface provided continuously with the first support surface and inclined to the one side with respect to the height direction, and wherein the coupling body comprises a pressing depression formed recessed in the second support surface.A power electronic device comprising: a housing having a space therein; a coupling member attachment / removal part disposed on a rear upper side of the housing; and a coupling member removably coupled to the coupling member attachment / removal part, wherein the coupling member attachment / removal part comprises: a coupling member accommodating portion open at upper and rear sides thereof and partially surrounded by an upper surface of the housing; and a coupling opening portion formed in the upper surface of the housing, and wherein the coupling member comprises: a coupling body accommodated in the coupling member accommodating portion; and a coupling arm extending from a lower side of the coupling body, engages and is coupled to the coupling opening portion.The power electronic device according to claim 10, wherein the coupling hole portion comprises: a first coupling hole portion disposed toward a front side of the coupling member accommodating portion; and a second coupling hole portion disposed toward a rear side of the coupling member accommodating portion, and wherein the coupling arm comprises: a first coupling arm disposed toward a front side of the coupling body and configured to engage with the first coupling hole portion; and a second coupling arm disposed toward a rear side of the coupling body and configured to engage with the second coupling hole portion.The power electronic device according to claim 11, wherein the first coupling arm comprises: a first coupling extension portion provided continuously with the coupling body and configured to engage with the first coupling opening portion; and a first coupling protrusion disposed at an end of the first coupling extension portion, protruding forward, and being coupled to an upper inner surface of the housing, and wherein the second coupling arm comprises: a second coupling extension portion provided continuously with the coupling body and configured to engage with the second coupling opening portion; and a second coupling protrusion disposed at an end of the second coupling extension portion, protruding rearward, and being coupled to an upper inner surface of the housing.The power electronic device according to claim 10, wherein the coupling member comprises a support arm provided continuously with a rear side of the coupling body and obliquely extending rearward such that a lower end thereof protrudes downward beyond a lower end of the coupling body, wherein the support arm is configured to elastically support the coupling body, wherein the coupling body is spaced apart from the upper surface of the housing, and wherein the support arm is in contact with the upper surface of the housing.The power electronic device according to claim 10, wherein the coupling member attaching / removing part includes a guide flat part that protrudes in an up / down direction, extends in a left / right direction, and is formed to have a thickness in a forward / backward direction, and wherein the coupling member includes a guide groove formed in a surface of the coupling body with respect to the left / right direction, that extends in the up / down direction, and is configured to movably accommodate the guide flat part.The power electronic device according to claim 14, wherein the guide sheet comprises: a first guide sheet disposed toward one side with respect to the left / right direction; and a second guide sheet disposed toward the other side with respect to the left / right direction, and disposed to be spaced apart from the first guide sheet, and wherein the guide groove comprises: a first guide groove formed in a left surface of the coupling body in the up / down direction and configured to movably accommodate the first guide sheet; and a second guide groove formed in a right surface of the coupling body in the up / down direction and configured to movably accommodate the second guide sheet.The power electronic device according to claim 15, wherein the coupling member attaching / removing part includes a rib receiving portion formed between the first guide flat part and the second guide flat part, and wherein the coupling member includes: a flat part receiving groove recessed on a lower surface of the coupling body and configured to receive the first guide flat part and the second guide flat part, and further configured to communicate with the first guide groove and the second guide groove; and a guide rib disposed in the flat part receiving groove, extending in the forward / rearward direction and the upward / downward direction, and housed in the rib receiving portion.The power electronic device according to claim 10, wherein the coupling body comprises: a first coupling body extending in an up / down direction; a second coupling body provided continuously with the first coupling body and extending in the forward / backward direction; and a coupling protrusion portion disposed at a rear end of the second coupling body, protruding upward, and coupled to a holding member provided in an external terminal module.The power electronic device according to claim 17, wherein the coupling protrusion portion comprises: a first support surface formed such that a front surface thereof extends obliquely rearward and upward; and a second support surface formed such that a rear surface is provided continuously with the first support surface and extends obliquely rearward and downward, and wherein the holding member of the terminal module comprises: a first extension arm extending forward; a second extension arm disposed at a front end of the first extension arm, protruding toward the coupling protrusion portion, and coupled to the coupling protrusion portion by a hook fit.The power electronics device of claim 18, wherein the coupling body comprises a pressure well recessed in the second support surface.The power electronic device according to claim 10, wherein the coupling body comprises: a first coupling body extending in an up / down direction; and a pressing protrusion portion protruding upward from an upper end of the first coupling body, and wherein the pressing protrusion portion is exposed to the outside of a holding member provided on an external terminal module and coupled to the coupling member by a hook fit.

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