ELECTRONIC DEVICE

Abstract

An electronic device (1) comprises a conductive housing (11), a conductive cover (12), and a conductive wire (15). The housing (11) has an opening and is at a potential set to a reference potential. The cover (12) is detachably attached to the housing (11) to cover the opening. The cover (12) can be opened and closed. The conductive wire (15) electrically connects the housing (11) and the cover (12) to cause the cover (12) to be at the same potential as the housing (11). A locking element (31) prevents the cover (12) from being removed from the housing (11) when the conductive wire (15) electrically connects the housing (11) and the cover (12).

Description

Technical field

[0001] The present disclosure relates to an electronic device. Background of the invention

[0002] An electronic device comprises a housing containing various electronic components. The housing has an opening for inspection and maintenance of the electronic components inside. The opening is fitted with a cover that can be opened and closed to prevent outside air, containing contaminants such as dust and water, from entering the housing and damaging the electronic components. If the housing and cover are made of metal and if a seal is arranged along the edge of the opening in the housing, the cover is not in direct contact with the housing. In this configuration, the cover can become charged even though the housing is grounded.

[0003] To ensure worker safety during maintenance, a conductive wire is used to electrically connect the cover to the grounded housing, allowing the cover and housing to be at the same potential. Patent Reference 1 describes an example of such an electronic device. The electronic device described in Patent Reference 1 includes a grounding wire that causes the door to be at the same potential as the housing. The grounding wire is attached at one end to the housing and at the other end to a pivot shaft that supports the door for opening and closing. List of citations from patent literature

[0004] Patent literature 1: Unexamined Japanese utility model application with publication number S61-180509 Summary of the invention: Technical problem

[0005] The cover can be removed for maintenance of the electronic device. If a worker removes the cover from the housing while the conductive wire remains connected to both the housing and the cover, the conductive wire may be damaged.

[0006] Under such circumstances, it is an objective of the present disclosure to provide an electronic device that prevents damage to the conductive wire which serves to ensure that the cover has the same potential as the housing. Solution to the problem

[0007] To achieve the aforementioned objective, an electronic device according to one aspect of the present disclosure comprises a conductive housing, a conductive cover, a conductive wire, and a locking element. The housing has an opening and is at a potential set to a reference potential. The cover is detachably attached to the housing to cover the opening. The cover can be opened and closed. The conductive wire electrically connects the housing and the cover to cause the cover to be at the same potential as the housing. The locking element prevents the cover from being removed from the housing when the conductive wire is electrically connecting the housing and the cover. Advantageous effects of the invention

[0008] The electronic device according to the above aspect of the present disclosure comprises the locking element that prevents the cover from being removed from the housing when the conductive wire electrically connects the cover and the housing. This prevents damage to the conductive wire. Brief description of the drawings Fig. Figure 1 shows a perspective view of an electronic device according to embodiment 1; Fig. Figure 2 shows a partial perspective view of the electronic device according to embodiment 1; Fig. Figure 3 shows a partial front view of the electronic device according to embodiment 1; Fig. Figure 4 shows a partial front view of a housing and a first member in embodiment 1; Fig. Figure 5 shows a partial front view of a cover and a second member in embodiment 1; Fig. Figure 6 shows a view of the cover in embodiment 1, which cannot be removed in an example; Fig. Figure 7 shows a view of the cover in embodiment 1, which can be taken from an example; Fig. Figure 8 shows a partial perspective view of an electronic device according to embodiment 2; Fig. Figure 9 shows a partial perspective view of a first member and a second member in embodiment 2; Fig. 10 shows a view of a cover in embodiment 2, which cannot be removed in an example; Fig. Figure 11 shows a view of the cover in embodiment 2, which can be taken from an example; Fig. 12 shows a partial front view of an electronic device according to embodiment 3; Fig. Figure 13 shows a view of the cover in embodiment 3, which cannot be removed in an example; Fig. Figure 14 shows a view of the cover in embodiment 3, which can be taken from an example; Fig. 15 represents a partial front view of an electronic device according to a first modification of an embodiment; Fig. 16 shows a partial front view of an electronic device according to a second modification of an embodiment; Fig. 17 represents a partial perspective view of an electronic device according to a third modification of an embodiment; Fig. 18 shows a partial front view of a first member encompassed by the electronic device according to the third modification of the embodiment; and Fig. Figure 19 shows a partial front view of an electronic device according to a fourth modification of an embodiment. Description of the embodiments

[0009] An electronic device according to one or more embodiments of the present disclosure is described in detail below with reference to the accompanying drawings. Identical or corresponding components are identified in the drawings by the same reference numerals. Design 1

[0010] An exemplary electronic device comprises a drive control unit for a rail vehicle. The drive control unit includes, for example, a power converter, a circuit breaker, and a transformer. An electronic device 1 according to embodiment 1 is described using the example of a drive control unit installed under the floor of a rail vehicle.

[0011] As in the Fig. 1, Fig. 2 to Fig. As illustrated in Figure 3, the electronic device 1 comprises a conductive housing 11 with a potential set to a reference potential, a conductive cover 12 which can be opened and closed and which is detachably attached to the housing 11 to cover an opening 11a in the housing 11, a conductive wire 15 for electrically connecting the housing 11 and the cover 12 to cause the cover 12 to have the same potential as the housing 11, and a locking element 31 to prevent the cover 12 from being removed from the housing 11 when the conductive wire 15 electrically connects the housing 11 and the cover 12. The locking element 31 prevents damage to the conductive wire 15 caused by removing the cover 12 while the conductive wire 15 is electrically connecting the housing 11 and the cover 12.

[0012] The electronic device 1 comprises, as an assembly for attaching the cover 12 to the housing 11, a conductive first element 13 attached to the housing 11 and a conductive second element 14 attached to the cover 12. In embodiment 1, the electronic device 1 comprises two first elements 13 and two second elements 14. Each second element 14 is detachably attached to the corresponding first element 13 and is rotatably mounted by the first element 13 about a pivot axis AX1. The conductive wire 15 electrically connects one of the two first elements 13 to the corresponding second element 14 to ensure that the first element 13 and the second element 14 have the same potential. The first element 13 has the same potential as the housing 11. The second element 14 has the same potential as the cover 12.The conductive wire 15 causes the first link 13 and the second link 14 to have the same potential, thus ensuring that the housing 11, which contains the first link 13, and the cover 12, which contains the second link 14, have the same potential.

[0013] In the Fig. 1, Fig. 2 to Fig. In Figure 3, the Z-axis is a vertical direction. The opening 11a extends in the Y-direction. The X-axis extends horizontally along a plane that encompasses the opening 11a in the housing 11. The X-axis, the Y-axis, and the Z-axis are perpendicular to each other. The same applies to subsequent figures.

[0014] Housing 11 is attached to the underside of a rail vehicle by a bracket (not illustrated). Housing 11 contains, for example, a power converter, a circuit breaker, and a transformer. As shown in Fig. As illustrated in Figure 4, the enclosure 11 has an opening 11a for servicing the electronic components contained within the enclosure 11. The enclosure 11 is formed from a conductor and is at a potential set to the reference potential. The reference potential is sufficiently low to allow a worker to perform safe maintenance and inspection. For example, the enclosure 11 is grounded. The enclosure 11 may have sufficient strength to withstand deformation caused by vibrations from a moving rail vehicle. For example, the enclosure 11 may be made of metal such as aluminum, iron, or stainless steel.

[0015] As in Fig. As illustrated in Figure 3, the cover 12 is detachably attached to the housing 11 to cover the opening 11a and the area surrounding it. The cover 12 is rotatably mounted on the housing 11 about the axis of rotation AX1, indicated by a dashed line. This allows the cover 12 to be opened and closed. The cover 12 is formed from a conductor. For example, the cover 12 is a flat plate made of metal such as aluminum or stainless steel.

[0016] The first links 13 are attached to the housing 11. The first links 13 are formed from a conductor. As in the Fig. 2, Fig. 3 to Fig. As illustrated in Figure 4, for example, each first link 13 is attached to the housing 11 by conductive fastening devices 21. This ensures that the first links 13 have the same potential as the housing 11. The first links 13 and the fastening devices 21 can be made of metal such as aluminum or stainless steel.

[0017] Each first link 13 comprises a plate-like housing attachment 13a that is attached to the housing 11, a holder 13b that holds the corresponding second link 14, and a conductive wire attachment 13c to which the conductive wire 15 is attached.

[0018] The housing mounting 13a is in surface contact with the housing 11 and is attached to it by the mounting devices 21. More precisely, the housing mounting 13a is attached to the outer surface of the housing 11. The outer surface of the housing 11 encloses the opening 11a, and the housing mounting 13a is located adjacent to the opening 11a.

[0019] The holder 13b is formed continuously with the housing mounting 13a and has a column-shaped form. In embodiment 1, the holder 13b is cylindrical. As shown in the Fig. 3 and Fig. As illustrated in Figure 4, the holder 13b has an insertion bore 13e for receiving the second link 14.

[0020] As in the Fig. 2, Fig. 3 to Fig. As illustrated in Figure 4, the conductive wire holder 13c is formed continuously with the housing holder 13a and is a flat plate. In embodiment 1, the conductive wire holder 13c is a flat plate with a main surface parallel to the XY plane. The conductive wire holder 13c accommodates a first end 15a, which is one end of the conductive wire 15. The conductive wire holder 13c has an insertion hole 13d for receiving the locking element 31 for attaching the first end 15a of the conductive wire 15. The insertion hole 13d may be threaded on its wall.

[0021] The second links 14 are attached to the cover 12. The second links 14 are formed from a conductor. As shown in the Fig. 2, Fig. 3 and Fig. As illustrated in Figure 5, for example, every second link 14 is attached to the cover 12 by conductive fasteners 22. This causes the second links 14 to have the same potential as the cover 12. The second links 14 and the fasteners 22 can be made of metal such as aluminum or stainless steel.

[0022] Each second link 14 comprises a plate-like cover fastening 14a attached to the cover 12 and a shaft 14b with a shaft end 14c which is guided through the insertion bore 13e in the holder 13b of the corresponding first link 13 to the rotatable bearing.

[0023] The cover fastening 14a is at least partially in surface contact with the cover 12 and is attached to it by the fastening devices 22. More precisely, the cover fastening 14a is attached to the cover 12 such that the shaft 14b is located away from the cover 12, or more precisely, in a position adjacent to the edge of the cover 12. In embodiment 1, part of the cover fastening 14a is in surface contact with the cover 12, and the remaining part of the cover fastening 14a projects vertically upwards from the cover 12.

[0024] The shaft 14b is formed continuously with the cover fastening 14a and has a columnar shape. In embodiment 1, the shaft 14b is cylindrical. The shaft 14b has a cylindrical shaft end 14c that extends in the same direction as the central axis of the cylinder. The shaft end 14c is positioned in the holder 13b of the first member 13 and rotatably supports the shaft 14b about the axis of rotation AX1.

[0025] When the second link 14 moves in the positive X direction, so that the shaft end 14c of the shaft 14b in the second link 14 is inserted into the insertion bore 13e in the holder 13b of the first link 13, the second link 14 is detachably attached to the first link 13. This detachably attaches the cover 12 to the housing 11.

[0026] As in the Fig. 2 and Fig. As illustrated in Figure 3, the conductive wire 15 electrically connects the housing 11 and the cover 12. The conductive wire 15, which electrically connects the housing 11 and the cover 12, causes the cover 12 to have the same potential as the housing 11. More specifically, this means that, as shown in the Fig. 1, Fig. 2 to Fig. Figure 3 illustrates that the first end 15a of the conductive wire 15 is attached to the first link 13. The first end 15a of the conductive wire 15 is a solderless connection. The first end 15a is in surface contact with the conductive wire attachment 13c in the first link 13 and is attached to the conductive wire attachment 13c by the locking element 31.

[0027] A second end 15b, which is the other end of the conductive wire 15, is attached to the second segment 14. The second end 15b of the conductive wire 15 is a solderless connection. The second end 15b is in surface contact with the cover mounting 14a in the second segment 14 and is attached to the cover mounting 14a by a fastening device 33.

[0028] The conductive wire 15 comprises a conductor and an insulator covering the conductor, with both ends of the conductor exposed. The conductive wire 15 is preferably flexible enough to allow the cover 12 to be opened and closed when it electrically connects the housing 11 and the cover 12, and is preferably, for example, a flexible wire. If the conductive wire 15 is a flexible wire, it will not be damaged when the cover 12 is opened or closed.The conductive wire 15, which electrically connects the housing 11 and the cover 12, refers to the fact that the first end 15a is connected to the housing 11 or the first link 13, which receives the first end 15a of the conductive wire 15, when the electronic device 1 is in operation, and that the second end 15b is connected to the cover 12 or the second link 14, which receives the second end 15b of the conductive wire 15, when the electronic device 1 is in operation.

[0029] As in the Fig. 2 and Fig. As illustrated in Figure 3, the locking element 31 is a fastening element, or more precisely, a fastening device that detachably attaches the conductive wire 15 to the first link 13. The locking element 31 comprises a head 31a and a threaded shaft 31b extending from the head 31a. The head 31a has a larger diameter than the insertion hole 13d in the conductive wire attachment 13c. The shaft 31b is positioned in the insertion hole 13d in the conductive wire attachment 13c in the first link 13. The locking element 31, positioned in the insertion hole 13d of the conductive wire attachment 13c, and a nut 32 on the conductive wire attachment 13c at a position opposite the head 31a, screw the first end 15a onto the conductive wire attachment 13c.

[0030] To prevent damage to the conductive wire 15 in the electronic device 1 with the above structure, the cover 12 is prevented from being removed from the housing 11 when the conductive wire 15 electrically connects the housing 11 and the cover 12. When the conductive wire 15 is electrically disconnected from the housing 11 and / or the cover 12, the cover 12 may be removed from the housing 11. The electrical separation of the conductive wire 15 from the housing 11 and / or the cover 12 refers to the fact that the first end 15a is removed from the housing 11 or from the first member 13, which receives the first end 15a of the conductive wire 15, during operation of the electronic device 1, or that the second end 15b is removed from the cover 12 or from the second member 14, which receives the second end 15b of the conductive wire 15, during operation of the electronic device 1.

[0031] In embodiment 1, when the conductive wire 15 electrically connects the first element 13 and the second element 14, the locking element 31 prevents the cover 12 from moving in a direction that would remove the cover 12 from the housing 11. More precisely, as in Fig. Figure 6 illustrates that when the conductive wire 15 is attached to the first link 13, the locking element 31 prevents the second link 14 from moving in a direction in which the second link 14 is removed from the first link 13. The head 31a in the locking element 31, which is in contact with the shaft 14b in the second link 14, prevents the second link 14 from moving out of the Fig. The illustrated position 6 in the negative X direction prevents the cover 12 from being removed from the housing 11.

[0032] In embodiment 1, when the conductive wire 15 is removed from the first element 13, the locking element 31 allows the cover 12 to move in the direction in which the cover 12 is removed from the housing 11. More precisely, as in Fig. Figure 7 illustrates that when the locking element 31 is removed from the conductive wire attachment 13c, the first end 15a is removed from the conductive wire attachment 13c in the first link 13. With the locking element 31 and the first end 15a removed, the second link 14 is allowed to move in the negative X direction. This allows the cover 12 to be removed from the housing 11.

[0033] If the cover 12 is removed from the in Fig. As illustrated in Figure 7, the shaft is moved in the positive X direction and the shaft end 14c of the shaft 14b, which is encompassed by the second link 14 attached to the cover 12, is inserted into the holder 13b of the first link 13, the cover 12 is attached to the housing 11. As shown in Figure 7, the shaft end 14c is inserted into the holder 13b of the first link 13, and the cover 12 is attached to the housing 11. Fig. As illustrated in Figure 7, the conductive wire 15, the second end 15b of which is attached to the second link 14, is first guided in the direction in which the cover 12 is attached to the housing 11, and then guided in the opposite direction. This allows the conductive wire 15 to be guided along the holder 13b in the first link 13 and the shaft 14b in the second link 14, as shown in the Fig. 2 and Fig. Figure 3 illustrates. The first end 15a is then attached to the conductive wire attachment 13c in the first link 13, giving the cover 12 the same potential as the housing 11.

[0034] When the conductive wire 15 electrically connects the housing 11 and the cover 12, the locking element 31 prevents the cover 12 from being removed from the housing 11 in the electronic device 1 according to embodiment 1, as described above. This prevents damage to the conductive wire 15 that would occur if the cover 12, which holds the conductive wire 15, were removed from the housing 11.

[0035] As described above, the conductive wire 15 is routed in the direction in which the cover 12 is attached to the housing 11, and then in the opposite direction. This allows the cover 12 to be opened and closed without damaging the conductive wire 15 when the cover 12 is electrically connected to the housing 11 to be at the same potential. Design 2

[0036] The cover 12 can be attached to the housing 11 by any other arrangement, different from that of embodiment 1, which allows the cover 12 to be detachably attached to the housing 11 and enables the cover 12 to be opened and closed. An electronic device according to embodiment 2 comprises an arrangement that differs from the arrangement in embodiment 1 and is described with a focus on the differences compared to embodiment 1.

[0037] One in Fig. Figure 8 illustrates the electronic device 2 according to embodiment 2, which comprises conductive first elements 16 attached to the housing 11 and conductive second elements 17 attached to the cover 12. The second elements 17 are detachably attached to the respective first elements 16 and rotatably mounted about a pivot axis AX2. The first elements 16 and the second elements 17 can be made of metal, such as aluminum or stainless steel.

[0038] Each first link 16 comprises a plate-like housing attachment 16a that is attached to the housing 11, a pair of retainers 16b that hold the second link 17, and a conductive wire attachment 16c to which the conductive wire 15 is attached.

[0039] The housing mounting 16a is in surface contact with the housing 11 and is attached to it by the mounting devices 21. More precisely, the housing mounting 16a is attached to the outer surface of the housing 11. The outer surface encompasses the opening 11a, and the housing mounting 16a is located adjacent to the opening 11a.

[0040] Each holder 16b is a flat plate formed continuously with the housing mounting 16a and extending away from the housing mounting 16a. In embodiment 2, each holder 16b is a plate-like element with a main surface parallel to the YZ plane and with a vertically downward-extending cutout. The cutout in the holder 16b can be engaged with the second element 17.

[0041] The conductive wire holder 16c is a flat plate that is continuous with the housing holder 16a and extends away from the housing holder 16a. In embodiment 2, the conductive wire holder 16c is a flat plate with a major surface parallel to the XY plane. The conductive wire holder 16c accommodates the first end 15a. As in Fig. Figure 9 illustrates where the conductive wire is 15 of the Fig. As not illustrated in Figure 8, the conductive wire fastening 16c has an insertion hole 16d for receiving the locking element 31 when the conductive wire 15 is attached. The insertion hole 16d may be threaded on its wall.

[0042] As in the Fig. 8 and Fig. As illustrated in Figure 9, every second link 17 has a through-hole 17a in the middle. The second link 17 comprises a plate-like cover attachment 17b, which is arranged vertically downwards from the through-hole 17a and attached to the cover 12, a plate-like engagement section 17c, which is arranged vertically upwards from the through-hole 17a and engages with the first link 16, and a conductive wire attachment 17d to which the conductive wire 15 is attached.

[0043] The through-hole 17a extends through the second member 17 in a direction perpendicular to the main surface of the second member 17. The through-hole 17a is large enough to allow the pair of holders 16b to pass through the first member 16.

[0044] The cover fastening 17b is at least partially in surface contact with the cover 12 and is attached to it by the fastening devices 22. More precisely, the cover fastening 17b is attached to the cover 12 in a position where the cover 12 does not block the through-hole 17a, or more precisely, in a position adjacent to the edge of the cover 12.

[0045] The intervention section 17c is received in the cutouts in the pair of holders 16b in the first segment 16 and is in intervention with the pair of holders 16b.

[0046] The conductive wire holder 17d is a flat plate formed continuously with the cover holder 17b and the engagement section 17c. The conductive wire holder 17d is a flat plate with a major surface parallel to the YZ plane. The conductive wire holder 17d receives the second end 15b. The conductive wire holder 17d has an insertion hole 17e for receiving a fastening device 33 when the conductive wire 15 is attached. The insertion hole 17e may be threaded on its wall.

[0047] The second link 17 with the above structure is formed by bending a single metal plate into two positions so that the two ends are opposite each other, and then a through hole is formed between the two bent positions.

[0048] Engaging the engagement section 17c of the second link 17 with the holder 16b in the first link 16 allows the second link 17 to be detachably attached to the first link 16. This allows the cover 12 to be detachably attached to the housing 11.

[0049] The conductive wire 15, which electrically connects the housing 11 and the cover 12, causes the cover 12 to have the same potential as the housing 11. More precisely, the first end 15a of the conductive wire 15 is a solderless connection. The first end 15a is in surface contact with the conductive wire attachment 16c in the first element 16 and is connected to the conductive wire attachment 16c by the locking element 31.

[0050] The second end 15b of the conductive wire 15 is a solderless connection. The second end 15b is in surface contact with the conductive wire attachment 17d in the second link 17 and is attached to the conductive wire attachment 17d by the fastening device 33. The fastening device 33 can be made of metal such as aluminum or stainless steel.

[0051] To prevent damage to the conductive wire 15 in the electronic device 2 with the above structure, the cover 12 is prevented from being removed from the housing 11 when the conductive wire 15 electrically connects the housing 11 and the cover 12. When the conductive wire 15 is electrically disconnected from the housing 11 and / or the cover 12, the cover 12 may be removed from the housing 11.

[0052] To remove the cover 12 from the housing 11 in the electronic device 2, the cover 12 must be removed from the housing 11. Fig. Position 8 illustrated rotated around the axis of rotation AX2, vertically upwards into the Fig. The illustrated position 10 is moved and then moved away from the housing 11. When the conductive wire 15 is attached to the first link 16, as shown in Fig. As illustrated in Figure 10, the locking element 31 prevents the second element 17 from moving in a direction in which the second element 17 is removed from the first element 16, or in the negative Y-direction. More precisely, the shaft 31b in the locking element 31 is in contact with the engagement section 17c of the second element 17 and prevents the second element 17 from moving out of the Fig. The illustrated position 10 is to be moved in the negative Y direction. This prevents the cover 12 from being removed from the housing 11.

[0053] If the locking element 31, as in Fig. As illustrated in Figure 11, once removed, the first end 15a of the conductive wire 15 is removed from the conductive wire attachment 16c in the first link 16, and the second end 15b of the conductive wire 15 is removed from the conductive wire attachment 17d in the second link 17. With the locking element 31 and the conductive wire 15 removed, the second link 17 is allowed to move in the negative Y direction. This allows the cover 12 to be removed from the housing 11.

[0054] To attach the cover 12 to the housing 11, the cover 12 is inserted in the positive Y direction into the Fig. The illustrated position 11 is moved, with the engagement section 17c of the second segment 17 facing the pair of retainers 16b in the first segment 16. The engagement section 17c of the second segment 17 is formed from the Fig. The illustrated position in the cutouts in the pair of holders 16b in the first link 16 is inserted and then rotated about the axis of rotation AX2 to insert the cover 12 into the Fig. The conductive wire 15 is connected to the first link 16 and the second link 17, giving the cover 12 the same potential as the housing 11.

[0055] When the conductive wire 15 electrically connects the housing 11 and the cover 12, the locking element 31 prevents the cover 12 from being removed from the housing 11 in the electronic device 2 according to embodiment 2, as described above. This prevents damage to the conductive wire 15 that would occur if the cover 12, which holds the conductive wire 15, were removed from the housing 11. embodiment 3

[0056] The connection position of the conductive wire 15 is not limited to the position described above, but can be any position that allows the cover 12 to be electrically connected to the housing 11 in order to have the same potential as the housing 11. An electronic device according to embodiment 3 comprises the conductive wire 15, which is connected in a different position than in embodiment 1, and is described with a focus on the differences compared to embodiment 1.

[0057] One in Fig. The illustrated electronic device 3 according to embodiment 3 comprises the conductive wire 15, the first end 15a of which is connected to the housing 11. The first end 15a of the conductive wire 15 is a solderless connection. The first end 15a is in surface contact with the housing 11 and is attached to the housing 11 by a fastening device 34. The fastening device 34 can be made of metal, such as aluminum or stainless steel. The conductive wire 15 connects the housing 11 to the second element 14 at the same potential as the cover 12, thus giving the cover 12 and the housing 11 the same potential.

[0058] To prevent damage to the conductive wire 15 in the electronic device 3 with the above structure, the cover 12 is prevented from being removed from the housing 11 when the conductive wire 15 electrically connects the housing 11 and the cover 12. When the conductive wire 15 is electrically disconnected from the housing 11 and / or the cover 12, the cover 12 may be removed from the housing 11.

[0059] In embodiment 3, the cover 12 is prevented from moving in a direction that would remove it from the housing 11 when the conductive wire 15 is connected to the housing 11 and the second element 14. The first end 15a of the conductive wire 15 serves as a locking element in the electronic device 3. More precisely, as shown in Fig. As illustrated in Figure 13, the first end 15a attached to the housing 11 prevents the second link 14 from moving in a direction in which the second link 14 is removed from the first link 13. The first end 15a, which is a solderless connection and is in contact with the shaft 14b in the second link 14, prevents the second link 14 from moving out of the Fig. The illustrated position 12 must be moved in the negative X direction. This prevents the cover 12 from being removed from the housing 11.

[0060] In embodiment 3, the cover 12 may move in the direction in which the cover 12 is removed from the housing 11 when the conductive wire 15 is disconnected from the housing 11. More precisely, as in Fig. Figure 14 illustrates that when the fastening device 34 is removed, the first end 15a of the conductive wire 15 is detached from the housing 11. When the first end 15a is detached from the housing 11, the second link 14 is allowed to move in the negative X direction. This allows the cover 12 to be removed from the housing 11.

[0061] The cover 12 is attached to the housing 11 in the same manner as described in embodiment 1. The conductive wire 15 is routed in the same manner as in embodiment 1, and then the first end 15a of the conductive wire 15 is attached to the housing 11 by means of the fastening device 34.

[0062] When the conductive wire 15 electrically connects the housing 11 and the cover 12, the first end 15a of the conductive wire 15, which is in contact with the shaft 14b in the second element 14, prevents the cover 12, to which the second element 14 is attached, from being removed from the housing 11 in the electronic device 3 according to embodiment 3, as described above. This prevents damage to the conductive wire 15 that would occur if the cover 12, which holds the conductive wire 15, were removed from the housing 11.

[0063] None of the embodiments of the present disclosure are limited to the embodiments above. The conductive wire 15 can be connected in any position that allows the cover 12 and the housing 11 to be electrically connected to each other to have the same potential. As shown in Fig. As illustrated in Figure 15, for example, the first end 15a of the conductive wire 15 can be attached to the housing mounting 13a in the first link 13 in the electronic device 3. As in embodiment 3, the first end 15a attached to the first link 13, which is in contact with the second link 14, prevents the second link 14 from moving in the direction in which the second link 14 is removed from the first link 13.

[0064] In another example, the second end 15b can be attached directly to the cover 12. More precisely, as in Fig. As illustrated in Figure 16, the second end 15b encompassed by the electronic device 1 can be directly attached to the cover 12 using the fastening device 33. The same applies to the electronic devices 2 and 3.

[0065] The first links 13 and 16 can have any structure that can be attached to the housing 11 and that can rotatably support the second links 14 and 17, which are attached to the cover 12. As shown in the Fig. 17 and Fig. As illustrated in Figure 18, the first link 13 can, for example, include a motion-locking link 13f that prevents the closed cover 12 from moving in the X-direction. The motion-locking link 13f is a flat plate formed continuously with the housing attachment 13a and extending away from the housing 11. More precisely, the motion-locking link 13f is a flat plate parallel to the YZ plane. The main surface of the motion-locking link 13f faces the surface of the second link 14, which is attached to the cover 12 and oriented in the negative X-direction. When the cover 12 is closed, the motion-locking link 13f, in a position in the negative X-direction, prevents the cover 12 from moving in the negative X-direction.

[0066] The conductive wire 15 can be attached in any way other than by fastening. More precisely, the first end 15a can be attached in any way that maintains surface contact with the first links 13 or 16 or with the housing 11. Similarly, the second end 15b can be attached in any way that maintains surface contact with the second link 14 or 17 or with the cover 12. More precisely, the first end 15a and the second end 15b can be attached, for example, by fitting, welding, or clamping.

[0067] Any other method, different from the examples above, can be used to prevent the second term 14 or 17 from being removed. In the Fig.In the electronic device 3 illustrated in Figure 19, for example, if the first end 15a of the conductive wire 15 is a thin flat plate, the fastening device 34, which attaches the first end 15a to the housing 11, can serve as a locking element. More precisely, the fastening device 34, which is in contact with the second element 14, prevents the second element 14 from moving in the direction in which the second element 14 is removed from the first element 13.

[0068] The blocking element 31 can be formed from a conductor. Although the first elements 13 and 16 have insulated surfaces, the blocking element 31 formed from a conductor allows the first end 15a and the first element 13 or 16 to be electrically connected to each other.

[0069] The fastening device 33 can be formed from a conductor. Although the second links 14 and 17 have insulated surfaces, the fastening device 33 formed from a conductor allows the second end 15b and the second link 14 or 17 to be electrically connected to each other by means of the fastening device 33.

[0070] The rotation axes AX1 and AX2 can extend in the vertical direction or in a direction that intersects the vertical or horizontal direction, instead of extending in the horizontal direction.

[0071] The first links 13 and 16 can be attached to the inner surface of the housing 11 instead of the outer surface of the housing 11. In this structure, the second links 14 and 17 can be attached to the surface of the cover 12, which faces the inner surface of the housing 11.

[0072] The opening 11a can be located in the vertically upper or vertically lower surface of the housing 11, instead of being located in the side surface of the housing 11.

[0073] The number of first links 13 and the positions in which the first links 13 are mounted in the electronic device 1 are suitably determined based on the size and weight of the cover 12. The electronic device 1 can comprise as many second links 14 as first links 13. The same applies to electronic devices 2 and 3.

[0074] Each of the electronic devices 1 to 3 can be mounted on a floor or a roof, instead of under a floor. Each of the electronic devices 1 to 3 can be mounted on a moving body such as a car, bus, ship, or aircraft, instead of on a rail vehicle. Each of the electronic devices 1 to 3 can be installed in any location indoors or outdoors other than on a moving body.

[0075] The foregoing describes some exemplary embodiments for illustrative purposes. Although the preceding discussion has presented specific embodiments, those skilled in the art will recognize that changes can be made with respect to a shape and a detail without departing from the broader spirit and scope of the invention. Accordingly, the description and the drawings are to be regarded as illustrative and not as limiting. This detailed description is therefore not to be understood in a limiting sense, and the scope of the invention is defined only by the appended claims together with the full scope of the equivalents to which such claims refer. Reference symbol list 1, 2, 3 electronic device 11 cases 11a Opening 12 Cover 13, 16 first part 13a, 16a Housing mounting 13b, 16b Holder 13c, 16c, 17d conductive wire fastening 13d, 16d, 17e insertion hole 13e Insertion bore 13f Movement locking element 14, 17 second part 14a, 17b Cover fastening 14b, 31b shaft 14c shaft end 15 conductive wire 15a first end 15b second end 17a Through hole 17c Intervention section 21, 22, 33, 34 Fastening device 31 Locking element 31a Head 32 Mother AX1, AX2 axis of rotation

Claims

Electronic device comprising: a conductive housing having an opening and at a potential set to a reference potential; a conductive cover detachably attached to the housing to cover the opening, the cover being openable and closeable; a conductive wire to electrically connect the housing to the cover to cause the cover to be at the same potential as the housing; and a locking element to prevent the cover from being removed from the housing when the conductive wire electrically connects the housing and the cover. Electronic device according to claim 1, wherein the housing is grounded. Electronic device according to claim 1 or 2, wherein the locking element enables the cover to be removed from the housing when the conductive wire is electrically disconnected from the cover and / or the housing. Electronic device according to claim 3, wherein when the conductive wire electrically connects the housing to the cover, the locking element prevents the cover from moving in a direction in which the cover is removed from the housing, and when the conductive wire is electrically disconnected from the housing, the locking element allows the cover to move in the direction in which the cover is removed from the housing. Electronic device according to any one of claims 1 to 4, further comprising: a conductive first element attached to the housing and having the same potential as the housing; and a conductive second element attached to the cover and having the same potential as the cover, wherein the second element is detachably attached to the first element, wherein the second element is rotatable about an axis of rotation together with the cover when attached to the first element. Electronic device according to claim 5, wherein if the conductive wire has a first end attached to the first member and a second end attached to the second member or the cover, the locking element prevents the second member from moving in a direction in which the second member is removed from the first member, and if the first end is removed from the first member, the locking element allows the second member to move in the direction in which the second member is removed from the first member. Electronic device according to claim 6, wherein the locking element is an attachment element for detachably attaching the first end to the first element, and when the first end is attached to the first element with the attachment element, the attachment element comes into contact with the second element to prevent the second element from moving in the direction in which the second element is removed from the first element. Electronic device according to claim 7, wherein the attachment member is a fastening device comprising a head and a threaded shank extending from the head, the fastening device being placed through an insertion hole in the first end being inserted into a threaded hole in the first member to cause the first end to be detachably attached to the first member, and the fastening device coming into contact with the second member in the threaded hole to prevent the second member from moving in the direction in which the second member is removed from the first member. Electronic device according to claim 6, wherein the locking element is the first end, and when the first end is attached to the first element, the first end comes into contact with the second element to prevent the second element from moving in the direction in which the second element is removed from the first element. Electronic device according to claim 5, wherein if the conductive wire has a first end attached to the housing and a second end attached to the second link or the cover, the locking element prevents the second link from moving in a direction in which the second link is removed from the first link, and if the first end is removed from the housing, the locking element allows the second link to move in the direction in which the second link is removed from the first link. Electronic device according to claim 10, wherein the locking element is an attachment element for detachably attaching the first end to the housing, and when the first end is attached to the housing with the attachment element, the attachment element comes into contact with the second element to prevent the second element from moving in the direction in which the second element is removed from the first element. Electronic device according to claim 10, wherein the locking element is the first end, and when the first end is attached to the housing, the first end comes into contact with the second element to prevent the second element from moving in the direction in which the second element is removed from the first element.

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