Electrical device, and electromagnetic relay

Abstract

To provide an electrical device capable of preventing microorganisms from entering the interior space of a case.SOLUTION: The electrical device includes an electronic component and a case. The case has a first wall 10. The case accommodates the electronic component in an interior space. A first wall 10 of the case has a first face and a second face 12. The first face faces the interior space of the case. The second face 12 is opposite the first face, facing outwards. The first wall 10 has a protrusion 5 that protrudes in the second direction. The second direction is opposite to the first direction, which is the direction from the first wall 10 toward the interior space. The protrusion 5 has a first recess 6 recessed in the first direction from the tip surface 51 of the protrusion 5. The bottom 61 of the first recess 6 is composed of a through hole 619 that penetrates the first wall 10 and a bottom surface 610 that does not penetrate the first wall 10.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present disclosure relates generally to an electric device and an electromagnetic relay, and more particularly to an electric device and an electromagnetic relay that include a case that houses electronic components in an interior space. [Background technology]

[0002] Patent Document 1 discloses an electromagnetic relay. The electromagnetic relay includes a base, an electromagnet device incorporated in the base, a contact portion incorporated in the base, an operating member that moves by the action of the electromagnet device to open and close the contact portion, and a case that houses the contact portion and the operating member in its internal space and is fixed to the base. The base has an exposed portion that is exposed from the case, and the exposed portion is provided with a sealable ventilation hole with a circular cross section that communicates with the internal space of the case. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-59702 Summary of the Invention [Problem to be solved by the invention]

[0004] In electrical devices such as the electromagnetic relay described in Patent Document 1, microorganisms such as ants may enter the case through the air vents and come into contact with the internal electronic components, causing malfunctions.

[0005] An object of the present disclosure is to prevent microorganisms from entering the interior space of the case. [Means for solving the problem]

[0006] An electrical device according to one aspect of the present disclosure includes an electronic component and a case. The case has a first wall portion. The case houses the electronic component in an internal space. The first wall portion of the case has a first surface and a second surface. The first surface faces the internal space of the case. The second surface is opposite to the first surface and faces the outside. The first wall portion has a protruding portion that protrudes in a second direction. The second direction is opposite to a first direction that is a direction from the first wall portion toward the internal space. The protruding portion has a first recess that is recessed from a tip surface of the protruding portion in the first direction. The bottom of the first recess is composed of a through hole that penetrates the first wall portion and a bottom surface that does not penetrate the first wall portion.

[0007] According to one aspect of the present disclosure, there is provided an electromagnetic relay including the electric device, wherein the electronic component includes a fixed contact provided on a fixed terminal and a movable contact facing the fixed contact, and the fixed terminal is held by the body. [Effects of the Invention]

[0008] According to the present disclosure, there is an advantage in that it is possible to suppress the invasion of microorganisms into the internal space of the case. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of an electrical device according to one embodiment of the present disclosure. [Figure 2] FIG. 2 is an exploded perspective view of the electric device. [Figure 3] FIG. 3 is a side view of the electrical device with the cover removed. [Figure 4] FIG. 4 is a rear view of the electrical device with the cover removed. [Figure 5] FIG. 5 is a perspective view of the main part of the electric device as viewed from the rear side with the cover removed. [Figure 6] FIG. 6 is a bottom view of the electric device. [Figure 7]7A and 7B are bottom and top views of the main parts of the electric device, respectively. [Figure 8] FIG. 8 is a perspective view of the main part of the electric device as viewed from below. [Figure 9] Fig. 9A is a cross-sectional view taken along the line A1-A1 in Fig. 7A, and Fig. 9B is a cross-sectional view taken along the line A2-A2 in Fig. 7A. [Figure 10] Fig. 10A is a bottom view of a main part of the electric device of Modification 1. Fig. 10B is a top view of a main part of the electric device of Modification 1. [Figure 11] Fig. 11A is a cross-sectional view taken along the line A3-A3 in Fig. 10A, and Fig. 11B is a cross-sectional view taken along the line A4-A4 in Fig. 10A. [Figure 12] Fig. 12A is a bottom view of a main part of the electric device of Modification 2. Fig. 12B is a top view of a main part of the electric device of Modification 2. [Figure 13] Fig. 13A is a cross-sectional view taken along the line A5-A5 in Fig. 12A, and Fig. 13B is a cross-sectional view taken along the line A6-A6 in Fig. 12A. [Figure 14] Fig. 14A is a bottom view of a main part of the electric device of Modification 3. Fig. 14B is a top view of a main part of the electric device of Modification 3. [Figure 15] Fig. 15A is a cross-sectional view taken along the line A7-A7 in Fig. 14A, and Fig. 15B is a cross-sectional view taken along the line A8-A8 in Fig. 14A. [Figure 16] Fig. 16A is a bottom view of the main part of the electric device of Modification 4. Fig. 16B is a top view of the main part of the electric device of Modification 4. [Figure 17] Fig. 17A is a cross-sectional view taken along the line A9-A9 in Fig. 16A, and Fig. 17B is a cross-sectional view taken along the line A10-A10 in Fig. 16A. [Figure 18] Fig. 18A is a bottom view of a main part of the electric device of Modification 5. Fig. 18B is a top view of a main part of the electric device of Modification 5. [Figure 19] Fig. 19A is a cross-sectional view taken along line A11-A11 in Fig. 18A, and Fig. 19B is a cross-sectional view taken along line A12-A12 in Fig. 18A. [Figure 20]Fig. 20A is a bottom view of the main part of the electric device of Modification 6. Fig. 20B is a top view of the main part of the electric device of Modification 6. [Figure 21] Fig. 21A is a cross-sectional view taken along the line A13-A13 in Fig. 20A, and Fig. 21B is a cross-sectional view taken along the line A14-A14 in Fig. 20A. [Figure 22] Fig. 22A is a bottom view of the main part of the electric device of Modification 7. Fig. 22B is a top view of the main part of the electric device of Modification 7. [Figure 23] Fig. 23A is a cross-sectional view taken along the line A15-A15 in Fig. 22A. Fig. 23B is a cross-sectional view taken along the line A16-A16 in Fig. 22A. [Figure 24] Fig. 24A is a bottom view of the main part of the electric device of Modification 8. Fig. 24B is a top view of the main part of the electric device of Modification 8. [Figure 25] Fig. 25A is a cross-sectional view taken along line A17-A17 in Fig. 24A, and Fig. 25B is a cross-sectional view taken along line A18-A18 in Fig. 24A. [Figure 26] Fig. 26A is a bottom view of the main part of the electric device of Modification 9. Fig. 26B is a top view of the main part of the electric device of Modification 9. [Figure 27] Fig. 27A is a cross-sectional view taken along line A19-A19 in Fig. 26A, and Fig. 27B is a cross-sectional view taken along line A20-A20 in Fig. 26A. [Figure 28] Fig. 28A is a bottom view of the main part of the electric device of Modification 10. Fig. 28B is a top view of the main part of the electric device of Modification 10. [Figure 29] Fig. 29A is a cross-sectional view taken along the line A21-A21 in Fig. 28A, and Fig. 29B is a cross-sectional view taken along the line A22-A22 in Fig. 28A. [Figure 30] Fig. 30A is a bottom view of the main part of the electric device of Modification 11. Fig. 30B is a top view of the main part of the electric device of Modification 11. [Figure 31] Fig. 31A is a cross-sectional view taken along line A23-A23 in Fig. 30A, and Fig. 31B is a cross-sectional view taken along line A24-A24 in Fig. 30A. [Figure 32] Fig. 32A is a bottom view of a main part of the electric device of Modification 12. Fig. 32B is a top view of a main part of the electric device of Modification 12. [Figure 33] Fig. 33A is a cross-sectional view taken along the line A25-A25 in Fig. 32A. Fig. 33B is a cross-sectional view taken along the line A26-A26 in Fig. 32A. [Figure 34] Fig. 34A is a bottom view of the main part of the electric device of Modification 13. Fig. 34B is a top view of the main part of the electric device of Modification 13. [Figure 35] Fig. 35A is a cross-sectional view taken along line A27-A27 in Fig. 34A, and Fig. 35B is a cross-sectional view taken along line A28-A28 in Fig. 34A. DETAILED DESCRIPTION OF THE INVENTION

[0010] The electrical devices of the embodiments of the present disclosure will be described with reference to the drawings. The drawings described in the following embodiments are schematic diagrams, and the ratios of the sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensional ratios.

[0011] (1) Implementation form (1.1) Overall structure As shown in FIGS. 1 to 3 , the electric device 100 includes an electronic component 1 and a case 40. The case 40 has an internal space 400 and accommodates the electronic component 1 in the internal space 400. The electric device 100 of this embodiment is an electromagnetic relay 101, a device that electrically controls the opening and closing of an electrical contact to open or close an electrical circuit. That is, the electromagnetic relay 101 includes the electric device 100. The electric device 100 as the electromagnetic relay 101 includes, as the electronic component 1, a fixed contact 31 provided on a fixed terminal 32 and a movable contact 33 facing the fixed contact 31. The electromagnetic relay 101 of this embodiment is a so-called hinge-type relay. The electromagnetic relay 101 is a so-called plug-in relay and is used in vehicles such as automobiles and motorcycles. The use of the electromagnetic relay 101 is not limited to vehicles and may be for other purposes. Furthermore, the electric device 100 is not limited to the electromagnetic relay 101, but may be any device that includes the electronic component 1 and the case 40.

[0012] As shown in Figures 1 to 3, an electromagnetic relay 101 as an electric device 100 includes an electromagnet device 20, a contact device 30, and a case 40. As shown in Figures 2 and 3, the contact device 30 includes a fixed terminal 32 and a common terminal 34. The case 40 includes a cover 41 and a body 42. The body 42 holds the fixed terminal 32 and the common terminal 34. The cover 41 has an opening 410 on one side, and is attached to the body 42 so as to close the opening 410.

[0013] For convenience, the following description will be given by defining three axes (X-axis, Y-axis, and Z-axis) of a right-handed three-dimensional Cartesian coordinate system for the electromagnetic relay 101 as follows. Specifically, the direction in which the cover 41 and the body 42 face each other is defined as the Z-axis direction. The direction perpendicular to the Z-axis direction, in which the fixed terminal 32 and the common terminal 34 face each other, is defined as the X-axis direction. The direction perpendicular to both the X-axis direction and the Z-axis direction is defined as the Y-axis direction. For convenience, the Z-axis direction is defined as the up-down direction, and the side on which the cover 41 is located with respect to the body 42 (the positive direction of the Z-axis) is defined as "up," and the opposite side is defined as "down." The X-axis direction is defined as the front-rear direction, and the side on which the fixed terminal 32 is located with respect to the common terminal 34 (the positive direction of the X-axis) is defined as "front," and the opposite side is defined as "rear." The Y-axis direction is defined as the left-right direction, and the positive direction of the Y-axis is defined as "left," and the opposite side is defined as "right." However, the definitions of axes and directions in this disclosure merely indicate the relative positional relationships between the components of the electromagnetic relay 101, and do not limit the orientation of the electromagnetic relay 101 when in use.

[0014] (1.2) Electromagnetic device As shown in FIGS. 2 to 4, the electromagnet device 20 includes a coil 21, a coil bobbin 22, an iron core 23, a yoke 24, an armature 25, and a pair of coil terminals 26.

[0015] The coil bobbin 22 is made of, for example, resin. The coil bobbin 22 integrally includes a tubular portion, an upper flange portion 221, and a lower flange portion 222. The tubular portion is a hollow cylinder that is long in the vertical direction and has a through-hole that penetrates in the axial direction. The upper flange portion 221 and the lower flange portion 222 are provided at the upper and lower ends of the tubular portion, respectively.

[0016] The upper flange 221 is formed in a generally rectangular plate shape. A contact cover 223, which is in an inverted U shape when viewed from the front, is provided at the front end of the upper surface of the upper flange 221 so as to cover the fixed contact 31 and the movable contact 33 from above. Protrusions 224 are provided at both left and right ends of the upper surface of the upper flange 221 to prevent the armature 25 from shifting in the front-rear direction.

[0017] The lower flange 222 is formed in a hollow, generally rectangular box shape with an open rear surface, and has an internal space 225 .

[0018] The coil 21 is wound around the cylindrical portion of the coil bobbin 22. Note that a coil coating made of resin such as vinyl chloride may be provided to cover the outer circumferential surface of the coil 21.

[0019] Iron core 23 is made of a magnetic material and has a cylindrical shaft portion 231 and a flange portion 232 provided at the upper end of shaft portion 231. Shaft portion 231 of iron core 23 is inserted into a through-hole of coil bobbin 22 from above, and the lower end of shaft portion 231 is located within internal space 225 of lower flange portion 222 of coil bobbin 22.

[0020] The coil terminals 26 are made of a conductive material. The coil terminals 26 are connected to the coil 21. One of the pair of coil terminals 26 is connected to a first end of the coil 21, and the other coil terminal 26 is connected to a second end of the coil 21. The coil terminals 26 are held by the body 42.

[0021] The coil terminal 26 includes a terminal piece 261 , a protruding piece 262 , and a connecting piece 263 .

[0022] The terminal piece 261 is a portion of the coil terminal 26 that is connected to the outside (an external connecting member). The connecting member is, for example, a socket for a plug-in relay. The terminal piece 261 is a rectangular plate in side view. The terminal piece 261 is exposed from the body 42 and protrudes downward. The protruding piece 262 is rod-shaped. The tip (first end or second end) of the coil 21 is wound around the protruding piece 262 and fixed by solder or the like. The connecting piece 263 is disposed within the body 42 (lower flange portion 222) and connects the terminal piece 261 and the protruding piece 262.

[0023] The yoke 24 has an L-shaped plate shape in a side view. The yoke 24 integrally includes a first portion 241 that has a rectangular plate shape in a front view and a second portion 242 that has a rectangular plate shape in a top view and extends forward from the lower end of the first portion 241. The second portion 242 has a through-hole in the center. The second portion 242 is inserted into the internal space 225 from the rear opening of the lower flange portion 222 of the coil bobbin 22, and the lower end of the shaft portion 231 of the core 23 is inserted into and fixed in the through-hole of the second portion 242 of the yoke 24.

[0024] The armature 25 is made of a magnetic material and has a flat plate shape. The armature 25 is disposed above the iron core 23 so as to face the upper surface of the flange 232 of the iron core 23. The rear end of the armature 25 is located above the upper end of the first portion 241 of the yoke 24. The armature 25 is fixed to a movable portion 351 of a movable spring 35 (described below) and displaces together with the movable portion 351. When the coil 21 is energized and excited via the pair of coil terminals 26, the armature 25 is attracted to the iron core 23 by the magnetic force. When the energization of the coil 21 is stopped, the armature 25 moves away from the iron core 23 due to the spring force of the movable spring 35.

[0025] (1.3) Contact device As shown in FIGS. 2 to 5, the contact device 30 includes a fixed contact 31, a fixed terminal 32, a movable contact 33, a common terminal , and a movable spring .

[0026] The fixed terminal 32 is made of a conductive material and is electrically connected to the fixed contact 31. The fixed terminal 32 is held by the body .

[0027] The fixed terminal 32 integrally includes a terminal piece 321, a contact piece 322, and a connecting piece 323.

[0028] The terminal piece 321 is a portion of the fixed terminal 32 that is connected to the outside (an external connecting member). The terminal piece 321 has a rectangular plate shape when viewed from the front. The terminal piece 321 is exposed from the body 42 and protrudes downward.

[0029] The contact piece 322 has a rectangular plate shape when viewed from above. The contact piece 322 has a fixed contact 31.

[0030] Here, the fixed contact 31 is provided on the contact piece 322 by fixing a metal fixed contact member, which is separate from the contact piece 322, to the contact piece 322 by crimping. Specifically, the fixed contact member has a head 311 and a body. The head 311 is circular and dome-shaped. For example, the upper surface of the head 311 is plated with silver. The body is cylindrical with a diameter smaller than that of the head 311 and extends downward from the head 311. A through hole is formed in the contact piece 322, and the body of the fixed contact member is inserted into the through hole of the contact piece 322, and the protruding end (lower end) of the body is crushed and expanded to fix the fixed contact member to the contact piece 322. Note that, without being limited to this, the fixed contact 31 may be part of the fixed terminal 32. For example, the fixed contact 31 may be formed by pushing upward a part of a plate member constituting the contact piece 322.

[0031] The connecting piece 323 connects the terminal piece 321 and the contact piece 322. The connecting piece 323 is a rectangular plate when viewed from the front. The lower end of the connecting piece 323 is fitted into recesses formed in the lower flange portion 222 of the coil bobbin 22 and the front end of the body 42. A through hole 324 is formed at the joint between the upper end of the connecting piece 323 and the front end of the contact piece 322.

[0032] The common terminal 34 is made of a conductive material and is electrically connected to the movable contact 33. The common terminal 34 is held by the body 42.

[0033] The common terminal 34 integrally includes a terminal piece 341, a fixing piece 342, a pair of upper pieces 343, a first connecting piece 344, a second connecting piece 345, and a third connecting piece 346.

[0034] The terminal piece 341 is a portion of the common terminal 34 that is connected to the outside (an external connection member). The terminal piece 341 has a rectangular plate shape in a side view. The terminal piece 341 is exposed from the body 42 and protrudes downward.

[0035] The fixing piece 342 is a rectangular plate when viewed from behind. A through hole is formed in the center of the fixing piece 342. A pair of fixing holes are formed on the left and right sides of the fixing piece 342 for fixing the common terminal 34 to the yoke 24 by caulking.

[0036] The pair of upper pieces 343 are each shaped like an L-shaped plate when viewed from the side. The pair of upper pieces 343 extend from both the left and right ends of the upper end of the fixed piece 342. The upper wall portions of the pair of upper pieces 343 are located above the rear end of the armature 25, and suppress unintended upward displacement of the armature 25.

[0037] As shown in FIGS. 4 and 5, the first to third connection pieces 344 to 346 connect the terminal piece 341 and the fixing piece 342 together.

[0038] The first connection piece 344 is a rectangular plate when viewed from behind, and extends downward from the lower end of the left end portion of the fixing piece 342.

[0039] The second connection piece 345 is a rectangular plate-like member when viewed from above, and extends forward from the lower end of the first connection piece 344.

[0040] The third connection piece 346 is a rectangular plate when viewed from above. The third connection piece 346 extends rightward from the right end of the front end portion of the second connection piece 345. The terminal piece 341 is connected to the right end of the third connection piece 346.

[0041] The movable spring 35 is made of a conductive material. As shown in Figures 2 to 4, the movable spring 35 has a movable portion 351 and a fixed portion 352, and is formed in a substantially L-shape when viewed from the front.

[0042] The movable part 351 is plate-shaped (plate spring-shaped). The armature 25 is fixed to the lower surface of the movable part 351. The movable part 351 has a movable contact 33 at its front end. The movable contact 33 is located above the fixed contact 31 and faces the fixed contact 31.

[0043] Here, the movable contact 33 is provided on the movable part 351 by fixing a metallic movable contact member, which is separate from the movable part 351, to the movable part 351 by caulking. Specifically, the movable contact member has a head 331 and a body 332. The head 331 is circular and dome-shaped. For example, the underside of the head 331 is plated with silver. The body 332 is cylindrical with a diameter smaller than that of the head 331 and extends upward from the head 331. A through-hole is formed in the movable part 351, and the body 332 of the movable contact member is inserted through the through-hole of the movable part 351. The protruding end (upper end) of the body 332 is crushed and expanded to fix the movable contact member to the movable part 351. Note that the movable contact 33 is not limited to this, and may be part of the movable spring 35. For example, the movable contact 33 may be formed by pushing a part of a plate member constituting the movable part 351 downward.

[0044] The fixed portion 352 is plate-shaped. The fixed portion 352 extends downward from the rear end of the movable portion 351. The lower end of the fixed portion 352 is located between the first portion 241 of the yoke 24 and the fixed piece 342 of the common terminal 34. The fixed portion 352 is fixed to the first portion 241 of the yoke 24 together with the fixed piece 342 of the common terminal 34 by, for example, caulking.

[0045] When the coil 21 is energized, the movable part 351 of the movable spring 35 is displaced together with the armature 25, and the movable contact 33 comes into contact with the fixed contact 31. When the coil 21 is de-energized, the spring force of the movable spring 35 displaces the movable part 351, and the movable contact 33 moves away from the fixed contact 31. That is, in the electromagnetic relay 101, the movable contact 33 moves between a closed position in which it comes into contact with the fixed contact 31 and an open position (see FIG. 2) in which it is separated from the fixed contact 31. A dummy member 36 is arranged on the underside of the contact cover portion 223 of the coil bobbin 22, which restricts the movable range of the movable spring 35 and determines the open position of the movable contact 33.

[0046] (1.4) Case As shown in FIGS. 1 and 2, the case 40 includes a cover 41 and a body 42.

[0047] The cover 41 is made of, for example, resin. The cover 41 is manufactured by, for example, resin molding. The cover 41 is in the shape of a rectangular box with an open bottom. That is, the cover 41 has an opening 410, peripheral walls 419 (a front wall 411, a left wall 412, a rear wall 413, and a right wall 414) surrounding the opening 410, and an upper wall 415.

[0048] The body 42 is made of, for example, resin. The body 42 is manufactured by, for example, resin molding. The body 42 has a rectangular plate shape when viewed from below. The body 42 is formed integrally with the lower wall of the lower flange portion 222 of the coil bobbin 22. In other words, the body 42 and the coil bobbin 22 are an integrated member. However, this is not a limitation, and the body 42 and the coil bobbin 22 may be separate bodies.

[0049] The body 42 has a recess 421 on the front surface into which the lower end of the connection piece 323 of the fixed terminal 32 is fitted (see FIG. 2). The body 42 also has a notch 422 on the rear end portion through which the upper end portion of the terminal piece 341 of the common terminal 34 passes (see FIG. 4). The body 42 also has a pair of through holes on both left and right sides through which the connection pieces 263 of the pair of coil terminals 26 pass (see FIG. 6).

[0050] The cover 41 is placed on the body 42 from above, thereby forming the case 40 having an internal space 400 .

[0051] 4 and 5, the second portion 242 of the yoke 24 and the second and third connection pieces 345 and 346 of the common terminal 34 are inserted into the internal space 225 of the lower flange 222, and the terminal piece 341 of the common terminal 34 is passed through the notch 422 of the body 42. In this state, as shown in FIGS. 4 and 5, the gap between the right surface of the upper end portion of the terminal piece 341 of the common terminal 34 and the body 42, the gap between the lower surface of the yoke 24 and the third connection piece 346 of the common terminal 34, and the gap between the lower surface of the second connection piece 345 of the common terminal 34 and the body 42 are sealed with sealing resins 431 and 432.

[0052] As shown in Figures 2 and 3, when the fixed terminal 32, the common terminal 34, and the pair of coil terminals 26 are held in the body 42 and the cover 41 is placed over them, the area around the protruding terminals on the underside of the body 42 is sealed with sealing resin 430.

[0053] As shown in FIGS. 5 and 6 , the case 40 has a first wall 10. In this embodiment, the body 42 of the case 40 has the first wall 10. The first wall 10 has a first surface 11 (upper surface) facing the internal space 400 of the case 40, and a second surface 12 (lower surface) opposite the first surface 11. The second surface 12 faces the outside. For convenience, the direction from the first wall 10 toward the internal space 400 of the case 40 may be referred to as a first direction D1, and the direction opposite to the first direction D1 may be referred to as a second direction D2 below. In this embodiment, the first direction D1 is along the positive direction (upward) of the Z axis, and the second direction D2 is along the negative direction (downward) of the Z axis.

[0054] (1.5)Protrusion As shown in FIGS. 6 to 8, the first wall 10 (body 42) has a protrusion 5 that protrudes in the second direction D2. The protrusion 5 is provided on the second surface 12 (lower surface) of the first wall 10 and protrudes in the second direction D2 (downward). The protrusion 5 has a frustum shape that protrudes in the second direction D2. The protrusion 5 has a tip surface 51 (lower surface) and a side surface 52. The tip surface 51 of the protrusion 5 is flat. As shown in FIGS. 6 and 7A, the shape of the periphery 510 of the tip surface 51 of the protrusion 5 is circular. The circular shape of the tip surface 51 of the protrusion 5 improves the strength of the protrusion 5 and makes it easier to mold. The shape of the periphery 510 of the tip surface 51 of the protrusion 5 is not limited to a perfect circle and may be an ellipse.

[0055] As shown in FIGS. 7A to 9B, the protrusion 5 has a first recess 6 recessed in a first direction D1 from the tip surface 51 of the protrusion 5. When viewed from the second surface 12 side, the first recess 6 is U-shaped (or C-shaped). The first recess 6 can also be said to be arc-shaped when viewed from the second surface 12 side. The central angle θ1 (see FIG. 7A) of the first recess 6 is in the range of 180° to 360°, and is 240° here. The first recess 6 extends along the periphery 510 (outer periphery) of the tip surface 51 of the protrusion 5.

[0056] 8 to 9B, the first recess 6 has a bottom 61 and a side 62. The bottom 61 is located higher than the tip surface 51 of the protrusion 5. The side 62 connects the bottom 61 of the first recess 6 and the tip surface 51 of the protrusion 5.

[0057] 7A to 9B, the bottom 61 of the first recess 6 is composed of a through hole 619 and a bottom surface 610. The through hole 619 and the bottom surface 610 are connected (adjacent when viewed from the second surface 12 side) in the extension direction of the first recess 6 (the direction in which the arc-shaped first recess 6 extends).

[0058] 7A to 9A, the through-hole 619 penetrates the first wall portion 10. The through-hole 619 is, for example, a ventilation hole. The through-hole 619 has an arch shape when viewed from the second surface 12 side.

[0059] As shown in FIGS. 7A and 8, the bottom surface 610 does not penetrate the first wall portion 10. The bottom surface 610 has a first bottom surface portion 611 and a second bottom surface portion 612. When viewed from the second surface 12 side, the first bottom surface portion 611 and the second bottom surface portion 612 each have an arc shape with a certain width. The through hole 619 is located between the first bottom surface portion 611 and the second bottom surface portion 612. The first bottom surface portion 611 and the second bottom surface portion 612 have shapes that are symmetrical in the front-to-back direction.

[0060] As shown in FIGS. 8 and 9B, each of the first bottom surface portion 611 and the second bottom surface portion 612 is an inclined surface. That is, the bottom surface 610 of the first recess 6 is an inclined surface. The bottom surface 610 is inclined so that the depth of the first recess 6 increases toward the through hole 619. That is, the bottom surface 610 is inclined so that the depth increases toward the first direction D1 (upward) toward the through hole 619. Specifically, in the extension direction of the first recess 6, the first bottom surface portion 611 has a first end away from the through hole 619 and a second end closer to the through hole 619. The first bottom surface portion 611 is inclined upward (in the first direction D1) from the first end toward the second end along the extension direction of the first recess 6. Similarly, the second bottom surface portion 612 has a first end away from the through hole 619 and a second end closer to the through hole 619 in the extension direction of the first recess 6. The second bottom surface portion 612 is inclined upward (first direction D1) from the first end to the second end along the extension direction of the first recess 6.

[0061] 8, a first end of each of the first bottom surface portion 611 and the second bottom surface portion 612 is connected without a step to the tip surface 51 of the protrusion 5. In other words, the first end of the bottom surface 610 is connected without a step to the tip surface 51 of the protrusion 5. Furthermore, a second end of each of the first bottom surface portion 611 and the second bottom surface portion 612 is connected without a step to the through hole 619. In other words, the second end of the bottom surface 610 is connected without a step to the through hole 619.

[0062] The area of ​​the bottom surface 610 of the first recess 6 (the sum of the area of ​​the first bottom surface portion 611 and the area of ​​the second bottom surface portion 612) plus the area of ​​the through hole 619 is greater than the area of ​​the through hole 619. In other words, the area of ​​the bottom surface 610 is not zero. "The area of ​​the bottom surface 610 of the first recess 6" is the area of ​​the region surrounded by the periphery of the bottom surface 610 when viewed from the second surface 12 side. "The area of ​​the through hole 619" is the area of ​​the region surrounded by the periphery of the through hole 619 when viewed from the second surface 12 side.

[0063] Furthermore, the area of ​​the bottom surface 610 of the first recess 6 (the sum of the area of ​​the first bottom surface portion 611 and the area of ​​the second bottom surface portion 612) is larger than the area of ​​the through hole 619. This makes it possible to suppress a decrease in the strength of the protrusion 5 due to the formation of the through hole 619, and to improve the strength of the protrusion 5.

[0064] The maximum width L1 of the through hole 619 is equal to or smaller than the width L2 of the first recess 6. The "maximum width L1 of the through hole 619" refers to the maximum dimension of the through hole 619 in the width direction perpendicular to the longitudinal direction of the through hole 619, and corresponds to the height of the arch-shaped through hole 619 here. The "width L2 of the first recess 6" refers to the dimension of the first recess 6 in the width direction perpendicular to the extension direction of the first recess 6. Here, the maximum width L1 of the through hole 619 is the same as the width L2 of the first recess 6.

[0065] 7A to 9B, the first wall portion 10 further has a second recess 7 recessed in a first direction D1 (upward) from the second surface 12. When viewed from the second surface 12 side, a periphery 70 of the second recess 7 is circular. The second recess 7 has a bottom surface 71 and a side surface 72.

[0066] The protrusion 5 protrudes in the second direction D2 (downward) from the bottom surface 71 of the second recess 7. The depth H2 of the second recess 7 is greater than the protruding dimension (height H1) of the protrusion 5. Therefore, as shown in FIGS. 9A and 9B, the second surface 12 of the first wall 10 is located closer to the second direction D2 (lower) than the tip surface 51 of the protrusion 5. The height H1 of the protrusion 5 is less than half the depth H2 of the second recess 7.

[0067] (1.6) Advantages The advantages of the electric device 100 of this embodiment will be explained by comparing it with an electric device of a comparative example. The electric device of the comparative example, like the electromagnetic relay described in Patent Document 1, has a recess with a circular periphery formed on the outer surface of the wall (body) of the case, a cylindrical protrusion formed at the center of this recess, and a through-hole with a circular cross section that penetrates the wall at the center of the protrusion. In the electric device of the comparative example, the through-hole in the wall is formed, for example, by using a cylindrical mold pin when manufacturing the wall by resin molding.

[0068] Such comparative mold pins require a certain degree of strength to prevent problems such as breakage or bending during resin molding of the wall portion, etc. Therefore, the diameter of the comparative mold pins is at least a certain size (for example, about 1.0 mm), and as a result, the diameter of the through holes in the wall portion is also at least a certain size (for example, about 1.0 mm).

[0069] On the other hand, in the electric device 100 of this embodiment, the protrusion 5 has the first recess 6 as described above, and the bottom 61 of the first recess 6 is composed of the through hole 619 and the bottom surface 610. Therefore, the mold pin used when manufacturing the first wall portion 10 by resin molding has not only a portion corresponding to the through hole 619 but also a portion corresponding to the bottom surface 610. Specifically, the shape of the mold pin corresponds to the shape of the first recess 6, for example, a needle shape (a cylindrical shape with an inclined surface at the tip; the shape of the tip of a syringe needle). This allows the width (thickness) of the mold pin to be reduced while maintaining the strength of the mold pin compared to the mold pin (cylindrical mold pin) for the comparative example. In other words, by integrally forming the portion corresponding to the through hole 619 and the portion corresponding to the bottom surface 610, the circumferential extension length of the mold pin can be increased, thereby improving the strength, and the width (thickness) of the mold pin can be reduced accordingly. According to the electric device 100 of this embodiment, by manufacturing the first wall portion 10 using such mold pins, the maximum width L1 of the through hole 619 can be made smaller than the diameter of the through hole of the electric device of the comparative example. Although not particularly limited, the maximum width L1 of the through hole 619 is, for example, about 0.1 to 0.2 mm. By making the maximum width L1 of the through hole 619 small in this way, it becomes difficult for microorganisms such as ants to pass through the through hole 619, and it is possible to suppress the invasion of microorganisms into the internal space 400 of the case 40.

[0070] As described above, the bottom surface 610 has the first bottom surface portion 611 and the second bottom surface portion 612 on either side of the through hole 619. In this case, the mold pin has an integral portion corresponding to the first bottom surface portion 611 and a portion corresponding to the second bottom surface portion 612 on either side of the portion corresponding to the through hole 619, further improving the strength of the mold pin. This allows the maximum width L1 of the through hole 619 to be reduced, further preventing microorganisms from entering the internal space 400 of the case 40.

[0071] As described above, the first recess 6 is U-shaped (arc-shaped) when viewed from the second surface side. The central angle θ1 of the arc-shaped first recess 6 is in the range of 180° to 360°. In this case, a needle-shaped mold pin can be used instead of a cylindrical mold pin. This further improves the strength of the mold pin.

[0072] As described above, the first recess 6 extends along the periphery 510 of the tip surface 51 of the protrusion 5. In this case, the extension length of the mold pin in the direction along the periphery 510 of the tip surface 51 of the protrusion 5 can be increased, thereby improving the strength of the mold pin.

[0073] As described above, the bottom surface 610 of the first recess 6 is inclined toward the first direction D1 (upward) as it approaches the through-hole 619. In this case, mold pins with inclined tips can be used as the mold pins. This improves the strength of the mold pins compared to mold pins for forming the first recess 6 having a non-inclined bottom surface 610 and a through-hole 619.

[0074] As described above, the protrusion 5 protrudes in the second direction D2 (downward) from the bottom surface 71 of the second recess 7, which is recessed from the second surface 12 of the first wall 10. This makes it less likely that the protrusion 5 will come into contact with external members, preventing problems such as damage to the protrusion 5. Furthermore, the second surface 12 of the first wall 10 is located closer to the second direction D2 (lower) than the tip surface 51 of the protrusion 5, and the entire protrusion 5 is contained within the second recess 7. This makes it even less likely that the protrusion 5 will come into contact with external members, preventing problems such as damage to the protrusion 5.

[0075] Furthermore, as described above, the protrusion 5 is provided on the body 42. This allows the protrusion 5 to be provided on the body 42, which is relatively thick and has high strength, and the reliability of the electric device 100 is improved.

[0076] The through hole 619 of the first recess 6 may be sealed after the lower surface of the body 42 is sealed with the sealing resin 430. In one example, the through hole 619 can be sealed (thermally sealed) by heating the protruding portion 5 to soften it, and then deforming the softened protruding portion 5 by pressing it with a sealing pin. The sealing is performed, for example, by fitting the body 42 into the opening 410 from above with the opening 410 of the cover 41 facing upward. Therefore, if the protruding portion 5 is provided on the body 42, the process of fitting the body 42 and the process of sealing the through hole 619 can be performed on a single line, improving the ease of assembly of the electric device 100.

[0077] (2) Variations The above embodiment is merely one of various embodiments of the present disclosure. The above embodiment can be modified in various ways depending on the design, etc., as long as the object of the present disclosure can be achieved. Modifications of the embodiment are listed below. The above embodiment and the modifications described below can be applied in appropriate combination.

[0078] (2.1) Variations 1 to 3 10A and 10B are bottom and top views of a main part (around the protrusion 5) of the electric device 100 of the modified example 1. Fig. 11A is a cross-sectional view taken along the line A3-A3 in Fig. 10A, and Fig. 11B is a cross-sectional view taken along the line A4-A4 in Fig. 10A.

[0079] 12A and 12B are bottom and top views of a main part (around the protrusion 5) of the electric device 100 of the modified example 2. Fig. 13A is a cross-sectional view taken along the line A5-A5 in Fig. 12A, and Fig. 13B is a cross-sectional view taken along the line A6-A6 in Fig. 12A.

[0080] 14A and 14B are bottom and top views of a main part (around the protruding portion 5) of the electric device 100 of the modified example 3. Fig. 15A is a cross-sectional view taken along the line A7-A7 in Fig. 14A, and Fig. 15B is a cross-sectional view taken along the line A8-A8 in Fig. 14A.

[0081] In electric devices 100 of modifications 1 to 3, as shown in FIGS. 10A, 12A, and 14A, the central angle θ1 of arc-shaped first recess 6 is 180°.

[0082] Furthermore, the height H1 of the protrusion 5 of the electric device 100 of Modifications 1 to 3 is different from one another. Specifically, the height H1 of the protrusion 5 of the electric device 100 of Modification 1 (see FIGS. 11A and 11B) is the same as the height H1 of the protrusion 5 of the electric device 100 of the embodiment (see FIGS. 9A and 9B), and is less than half the depth H2 of the second recess 7. The height H1 of the protrusion 5 of the electric device 100 of Modification 2 (see FIGS. 13A and 13B) is approximately 1.5 times the height H1 of the protrusion 5 of the electric device 100 of the embodiment, and is greater than half the depth H2 of the second recess 7. The height H1 of the protrusion 5 of the electric device 100 of Modification 3 (see FIGS. 15A and 15B) is approximately twice the height H1 of the protrusion 5 of the electric device 100 of the embodiment, and is slightly smaller than the depth H2 of the second recess 7.

[0083] 11B, 13B, and 15B, the inclination angle of the bottom surface 610 of Modifications 1 to 3 (the angle between the bottom surface 610 and the tip surface 51 of the protrusion 5) is larger than the inclination angle of the bottom surface 610 of the embodiment (see FIG. 8B). That is, the mold pins used when manufacturing the first wall portion 10 of the electric device 100 of Modifications 1 to 3 have a larger inclination angle of the inclined surface at the tip than the mold pin for the embodiment.

[0084] As shown in Fig. 10B, in electric device 100 of Modification 1, through hole 619 has an arcuate shape with some width. As shown in Fig. 12B, in electric device 100 of Modification 2, through hole 619 has an arcuate shape that is shorter and wider than that of Modification 1. As shown in Fig. 14B, in electric device 100 of Modification 3, through hole 619 has an arched shape.

[0085] In the electric devices 100 of the first to third modifications, the intrusion of microorganisms into the internal space 400 of the case 40 can also be prevented.

[0086] (2.2) Variation 4 16A and 16B are bottom and top views of a main part (around the protrusion 5) of the electric device 100 of the modified example 4. Fig. 17A is a cross-sectional view taken along the line A9-A9 in Fig. 16A, and Fig. 17B is a cross-sectional view taken along the line A10-A10 in Fig. 16A.

[0087] 16A, in electric device 100 of Modification 4, first recess 6 has a circular shape (central angle θ1 is 360°). That is, first recess 6 goes all the way around along periphery 510 of tip surface 51 of protrusion 5.

[0088] 17B, ​​the angle of inclination of bottom surface 610 in Modification 4 is smaller than the angle of inclination of bottom surface 610 in the embodiment (see FIG. 9B). That is, the mold pin used in manufacturing first wall portion 10 of electric device 100 in Modification 4 has a smaller angle of inclination of the inclined surface at the tip than that of the embodiment.

[0089] As shown in FIG. 16B, the through-hole 619 has an arched shape.

[0090] Electric device 100 of modification 4 can also prevent microorganisms from entering internal space 400 of case 40.

[0091] (2.3) Variations 5 to 7 18A and 18B are bottom and top views of a main part (around the protrusion 5) of the electric device 100 of the modified example 5. Fig. 19A is a cross-sectional view taken along the line A11-A11 in Fig. 18A, and Fig. 19B is a cross-sectional view taken along the line A12-A12 in Fig. 18A.

[0092] 20A and 20B are bottom and top views of a main part (around the protrusion 5) of the electric device 100 of the modified example 6. Fig. 21A is a cross-sectional view taken along the line A13-A13 in Fig. 20A, and Fig. 21B is a cross-sectional view taken along the line A14-A14 in Fig. 20A.

[0093] 22A and 22B are bottom and top views of a main part (around the protrusion 5) of the electric device 100 of the modified example 7. Fig. 23A is a cross-sectional view taken along the line A15-A15 in Fig. 22A, and Fig. 23B is a cross-sectional view taken along the line A16-A16 in Fig. 22A.

[0094] 18A, 20A, and 22A, the shape of the periphery 510 of the tip surface 51 of the protrusion 5 is polygonal, in this case a quadrilateral, more specifically a square. The first recess 6 extends along the periphery 510 of the tip surface 51 of the protrusion 5, and when viewed from the second surface 12 side, the first recess 6 includes an L-shaped portion.

[0095] In the electrical devices 100 of variants 5 to 7, as shown in Figures 18A, 20A, and 22A, the angle θ2 between the first end and the second end of the first recess 6 with respect to the center of the tip surface 51 is 240°, 180°, and 360°, respectively.

[0096] As shown in FIGS. 18B, 20B, and 22B, in electric devices 100 of modifications 5 to 7, through-holes 619 have a triangular shape.

[0097] In the electric devices 100 of the fifth to seventh modifications, the intrusion of microorganisms into the internal space 400 of the case 40 can also be prevented.

[0098] Furthermore, in the electric devices 100 of Modifications 5 to 7, the periphery 510 of the tip surface 51 of the protrusion 5 is polygonal, thereby improving the strength of the protrusion 5. Furthermore, since the periphery 510 of the tip surface 51 of the protrusion 5 is polygonal, the contact area between the circular sealing pin and the protrusion 5 is small when sealing the through-hole 619. Therefore, even if the sealing pin is brought into contact with the heated protrusion 5, heat is less likely to transfer from the protrusion 5 to the sealing pin, thereby preventing a sudden drop in temperature of the protrusion 5. Therefore, the electric devices 100 of Modifications 5 to 7 have the advantage that the through-hole 619 can be sealed easily.

[0099] The shape of the periphery 510 of the tip surface 51 of the protrusion 5 may be a rectangle, a rhombus, or any quadrangle, or may be a triangle or a polygon with five or more sides.

[0100] (2.4) Variations 8-10 25A and 25B are bottom and top views of a main part (around the protrusion 5) of the electric device 100 of the modified example 8. Fig. 25A is a cross-sectional view taken along the line A17-A17 in Fig. 24A, and Fig. 25B is a cross-sectional view taken along the line A18-A18 in Fig. 24A.

[0101] 26A and 26B are bottom and top views of a main part (around the protrusion 5) of the electric device 100 of the modified example 9. Fig. 27A is a cross-sectional view taken along the line A19-A19 in Fig. 26A, and Fig. 27B is a cross-sectional view taken along the line A20-A20 in Fig. 26A.

[0102] 28A and 28B are bottom and top views of a main part (around protrusion 5) of electric device 100 of modified example 10. Fig. 29A is a cross-sectional view taken along line A21-A21 in Fig. 28A, and Fig. 29B is a cross-sectional view taken along line A22-A22 in Fig. 28A.

[0103] In the electric devices 100 of Modifications 8 to 10, as shown in FIGS. 25A, 27A, and 29A, the tip surface 51 of the protrusion 5 includes a concave surface 511. The concave surface 511 is, for example, a curved surface. The concave surface 511 is concave in the first direction D1 (upward) as it moves inward (toward the center). Note that the entire tip surface 51 of the protrusion 5 is not concave; rather, the central portion of the tip surface 51 excluding the peripheral portion (the portion inside the first recess 6) is concave. The depth of the concave surface 511 (the distance in the vertical direction from the peripheral portion of the tip surface 51 to the center of the concave surface 511) is not particularly limited, but is, for example, smaller than the height H1 of the protrusion 5 and smaller than half the height H1 of the protrusion 5.

[0104] In the electric devices 100 of the eighth to tenth modifications, the intrusion of microorganisms into the internal space 400 of the case 40 can also be prevented.

[0105] Furthermore, since the tip surface 51 of the protrusion 5 includes the concave surface 511, when sealing the through-hole 619, resin tends to collect inside the protrusion 5. Therefore, the electric devices 100 of the eighth to tenth modifications have the advantage that the through-hole 619 can be easily sealed.

[0106] (2.5) Variations 11-12 30A and 30B are bottom and top views of a main part (around protrusion 5) of electric device 100 of Modification 11. Fig. 31A is a cross-sectional view taken along line A23-A23 in Fig. 30A, and Fig. 31B is a cross-sectional view taken along line A24-A24 in Fig. 30A.

[0107] 32A and 32B are bottom and top views of a main part (around protrusion 5) of electric device 100 of Modification 12. Fig. 33A is a cross-sectional view taken along line A25-A25 in Fig. 32A, and Fig. 33B is a cross-sectional view taken along line A26-A26 in Fig. 32A.

[0108] In the electric device 100 of the eleventh and twelfth modifications, as shown in FIGS. 31A and 33A, the tip surface 51 of the protrusion 5 includes a protruding surface 512. The protruding surface 512 is, for example, a curved surface. The protruding surface 512 bulges in the second direction D2 (downward) as it moves inward (toward the center). Note that the entire tip surface 51 of the protrusion 5 is not the protruding surface 512; rather, the central portion of the tip surface 51 excluding the peripheral portion (the portion inside the first recess 6) is the protruding surface 512. The height of the protruding surface 512 (the distance in the up-down direction from the peripheral portion of the tip surface 51 to the center portion of the protruding surface 512) is not particularly limited, but is, for example, smaller than the height H2 of the protrusion 5 and smaller than half the height H2 of the protrusion 5.

[0109] In the electric devices 100 of the eleventh and twelfth modifications, the intrusion of microorganisms into the internal space 400 of the case 40 can also be prevented.

[0110] Furthermore, since the tip surface 51 of the protrusion 5 includes the protruding surface 512, it is difficult for an edge to be formed when molding the first wall portion 10 having the protrusion 5. Therefore, the electric devices 100 of the modifications 11 and 12 have the advantage that molding of the first wall portion 10 is easy.

[0111] (2.6) Variation 13 34A and 34B are bottom and top views of a main part (around protrusion 5) of electric device 100 of Modification 13. Fig. 35A is a cross-sectional view taken along line A27-A27 in Fig. 34A, and Fig. 35B is a cross-sectional view taken along line A28-A28 in Fig. 34A.

[0112] In electric device 100 of Variation 13, as shown in FIG. 34A , peripheral edge 510 of tip surface 51 of protrusion 5 has an elliptical shape that is long in the front-to-rear direction. Protrusion 5 has recess 8 that is recessed in first direction D1 (downward) from tip surface 51. Side surface 82 of recess 8 has an inclined surface toward tip surface 51 of protrusion 5. The bottom of recess 8 is formed by a through-hole 89.

[0113] In the electric device 100 of the thirteenth modification, the mold pins used in manufacturing the first wall portion 10 by resin molding correspond to the shape of the recess 8 and are columnar with an oval cross section. This allows the width (thickness) of the mold pins to be reduced while maintaining their strength, compared to the mold pins (cylindrical mold pins) of the comparative example. That is, the length of the mold pins at their tip surfaces is increased to improve their strength, while the width (thickness) of the mold pins can be correspondingly reduced. According to the electric device 100 of the thirteenth modification, by manufacturing the first wall portion 10 using such mold pins, the width L3 of the through hole 89 can be made smaller than the diameter of the circular through hole of the electric device of the comparative example. While not particularly limited, the width L3 of the through hole 89 is, for example, approximately 0.1 to 0.2 mm. The narrow width L3 of the through hole 89 makes it difficult for microorganisms to pass through the through hole 89, thereby preventing microorganisms from entering the interior space 400 of the case 40.

[0114] (2.7) Other Modifications In one modified example, the cover 41 may have the first wall 10. For example, the first wall 10 may be any one of the front wall 411, the left side wall 412, the rear wall 413, the right side wall 414, and the top wall 415 of the cover 41. In other words, the protrusion 5 may be provided on the cover 41. In this case, there is an advantage that the shape of the cover 41 is less restricted than that of the body 42, and therefore it is easier to mold a part having the protrusion 5.

[0115] In one variant, the first wall 10 of the case 40 may not have the second recess 7 , and the protrusion 5 may protrude from the second surface 12 of the case 40 .

[0116] In one variant, the first recess 6 does not have to follow the periphery of the tip surface 51 of the protrusion 5; for example, an L-shaped first recess 6 (see Figure 18A, etc.) may be provided in a protrusion 5 having a circular periphery 510 of the tip surface 51 (see Figure 7A, etc.).

[0117] (3) Mode As can be seen from the above embodiments and modifications, the present specification discloses the following aspects.

[0118] The electric device (100) of the first embodiment includes an electronic component (1) and a case (40). The case (40) has a first wall (10). The case (40) houses the electronic component (1) in an internal space (400). The first wall (10) of the case (40) has a first surface (11) and a second surface (12). The first surface (11) faces the internal space (400) of the case (40). The second surface (12) is opposite to the first surface (11) and faces the outside. The first wall (10) has a protrusion (5) that protrudes in a second direction (D2). The second direction (D2) is opposite to a first direction (D1), which is a direction from the first wall (10) toward the internal space (400). The protrusion (5) has a first recess (6) recessed in a first direction (D1) from a tip surface (51) of the protrusion (5). The bottom (61) of the first recess (6) is composed of a through-hole (619) penetrating the first wall (10) and a bottom surface (610) that does not penetrate the first wall (10).

[0119] According to this embodiment, it is possible to prevent microorganisms from entering the internal space (400) of the case (40).

[0120] In the electric device (100) of the second embodiment, the sum of the area of ​​the bottom surface (610) of the first recess (6) and the area of ​​the through-hole (619) in the first embodiment is larger than the area of ​​the through-hole (619).

[0121] According to this embodiment, it is possible to prevent microorganisms from entering the internal space (400) of the case (40).

[0122] In the electric device (100) of the third aspect, in the first or second aspect, the bottom surface (610) has a first bottom surface portion (611) and a second bottom surface portion (612). The through-hole (619) is located between the first bottom surface portion (611) and the second bottom surface portion (612).

[0123] According to this embodiment, the strength of the mold pin for forming the first recess (6) can be improved.

[0124] In the electric device (100) of the fourth aspect, in any one of the first to third aspects, the first recess (6) of the protrusion (5) extends along the periphery (510) of the tip surface (51) of the protrusion (5).

[0125] According to this embodiment, the strength of the mold pin for forming the first recess (6) can be improved.

[0126] In the electric device (100) of the fifth aspect, in any one of the first to fourth aspects, the first recess (6) is U-shaped when viewed from the second surface (12) side.

[0127] According to this embodiment, the strength of the mold pin for forming the first recess (6) can be improved.

[0128] In the electric device (100) of the sixth aspect, in any one of the first to fourth aspects, the first recess (6) is L-shaped when viewed from the second surface (12) side.

[0129] According to this embodiment, the strength of the mold pin for forming the first recess (6) can be improved.

[0130] In the electric device (100) of the seventh aspect, in any one of the first to sixth aspects, the area of ​​the bottom surface (610) of the first recess (6) is larger than the area of ​​the through-hole (619).

[0131] According to this embodiment, the strength of the protrusion (5) can be improved.

[0132] In the electric device (100) of the eighth aspect, in any one of the first to seventh aspects, the peripheral edge (510) of the tip surface (51) of the protrusion (5) has a circular shape.

[0133] According to this embodiment, the strength of the protrusion (5) is improved and molding becomes easier.

[0134] In the electric device (100) of the ninth aspect, in any one of the first to seventh aspects, the shape of the periphery (510) of the tip surface (51) of the protrusion (5) is polygonal.

[0135] According to this embodiment, the strength of the protrusion 5 can be improved, and the through-hole 619 can be easily sealed.

[0136] In a tenth aspect of the electric device (100), in any one of the first to ninth aspects, the first wall (10) of the case (40) further has a second recess (7) recessed from the second surface (12) in the first direction (D1). The protrusion (5) protrudes in the second direction (D2) from a bottom surface (71) of the second recess (7).

[0137] According to this embodiment, the protrusion (5) is less likely to come into contact with external members, and problems such as damage to the protrusion (5) can be prevented.

[0138] In the electric device (100) of the eleventh aspect, in the tenth aspect, the second surface (12) of the first wall portion (10) is located on the second direction (D2) side of the tip surface (51) of the protrusion (5).

[0139] According to this embodiment, the protrusion (5) is less likely to come into contact with external members, and problems such as damage to the protrusion (5) can be prevented.

[0140] In the electric device (100) of the twelfth aspect, in any one of the first to eleventh aspects, the bottom surface (610) of the first recess (6) is inclined so as to be inclined in the first direction (D1) as it approaches the through-hole (619).

[0141] According to this embodiment, the strength of the mold pin for forming the first recess (6) can be improved.

[0142] In the electric device (100) of the thirteenth aspect, in any one of the first to twelfth aspects, the first recess (6) extends around the periphery (510) of the tip surface (51) of the protrusion (5).

[0143] According to this embodiment, the strength of the mold pin for forming the first recess (6) can be improved.

[0144] In the electric device (100) of the fourteenth aspect, in any one of the first to thirteenth aspects, the first recess (6) is arc-shaped or circular when viewed from the second surface (12) side. The central angle (θ1) of the first recess (6) is in the range of 180° to 360°.

[0145] According to this embodiment, the strength of the mold pin for forming the first recess (6) can be improved.

[0146] In the electric device (100) of the fifteenth aspect, in any one of the first to fourteenth aspects, the tip surface (51) of the protrusion (5) is recessed inward in the first direction (D1).

[0147] According to this embodiment, the through-hole (619) can be easily sealed.

[0148] In the electric device (100) of the sixteenth aspect, in any one of the first to fourteenth aspects, the tip surface (51) of the protrusion (5) bulges inward in the second direction (D2).

[0149] According to this embodiment, the first wall portion (10) can be easily molded.

[0150] In a seventeenth aspect of the electric device (100), in any one of the first to sixteenth aspects, the case (40) has a cover (41) and a body (42). The cover (41) has an opening (410) and a peripheral wall (419) surrounding the opening (410). The body (42) is fitted into the opening (410) of the cover (41). The protrusion (5) is provided on the body (42).

[0151] According to this embodiment, the reliability of the electrical device (100) can be improved.

[0152] An electromagnetic relay (101) of an 18th aspect includes the electric device (100) of any one of the first to 17th aspects. The electronic component (1) includes a fixed contact (31) provided on a fixed terminal (32) and a movable contact (33) facing the fixed contact (31). The fixed terminal (32) is held by a body (42).

[0153] According to this aspect, in the electromagnetic relay (101), it is possible to prevent microorganisms from entering the internal space (400) of the case (40). [Explanation of symbols]

[0154] 100 Electrical Equipment 101 Electromagnetic relay 1. Electronic Components 10 1st wall section 11 Page 1 12 Side 2 31 Fixed contacts 32 Fixed terminal 33 Movable contact 40 cases 400 interior space 41 Cover 410 Aperture 419 Peripheral wall 42 Body 5 Protrusion 51 Tip surface 510 Periphery 6 First recess 61 Bottom 610 bottom 611 1st bottom part 612 2nd bottom part 619 Through hole 7 Second recess 71 bottom D1 1st direction D2 Second direction θ1 central angle

Claims

1. Electronic components and a case having a first wall portion and accommodating the electronic component in an internal space, The first wall portion of the case is a first surface facing the internal space; a second surface opposite the first surface and facing the exterior; the first wall portion has a protruding portion that protrudes in a second direction that is an opposite direction to a first direction that is an orientation from the first wall portion toward the internal space, the protruding portion has a first recess recessed from a tip surface of the protruding portion in the first direction, The bottom of the first recess is composed of a through hole penetrating the first wall portion and a bottom surface that does not penetrate the first wall portion. Electrical equipment.

2. a sum of an area of ​​the bottom surface of the first recess and an area of ​​the through hole is larger than the area of ​​the through hole; 10. The electrical device of claim 1.

3. the bottom surface has a first bottom surface portion and a second bottom surface portion, The through hole is located between the first bottom surface portion and the second bottom surface portion.

3. An electrical device according to claim 1 or 2.

4. The first recess of the protruding portion extends along the periphery of the tip surface of the protruding portion. An electrical device according to any one of claims 1 to 3.

5. When viewed from the second surface side, the first recess is U-shaped. An electrical device according to any one of claims 1 to 4.

6. When viewed from the second surface side, the first recess is L-shaped. An electrical device according to any one of claims 1 to 4.

7. The area of ​​the bottom surface of the first recess is larger than the area of ​​the through hole. An electrical device according to any one of claims 1 to 6.

8. The shape of the periphery of the tip surface of the protrusion is circular. An electrical device according to any one of claims 1 to 7.

9. The shape of the periphery of the tip surface of the protrusion is polygonal. An electrical device according to any one of claims 1 to 7.

10. the first wall portion of the case further includes a second recess recessed from the second surface toward the first direction, The protruding portion protrudes from a bottom surface of the second recess in the second direction. An electrical device according to any one of claims 1 to 9.

11. The second surface of the first wall portion is located closer to the second direction than the tip surface of the protrusion.

11. An electrical device according to claim 10.

12. The bottom surface of the first recess is inclined toward the first direction as it approaches the through hole. An electrical device according to any one of claims 1 to 11.

13. The first recessed portion extends around the periphery of the tip surface of the protruding portion. An electrical device according to any one of claims 1 to 12.

14. When viewed from the second surface side, the first recess has an arc shape or a circle shape, The central angle of the first recess is in the range of 180° to 360°. An electrical device according to any one of claims 1 to 13.

15. The tip surface of the protrusion is recessed toward the first direction as it extends inward. An electrical device according to any one of claims 1 to 14.

16. The tip surface of the protrusion bulges toward the second direction as it extends inward. An electrical device according to any one of claims 1 to 14.

17. The case is a cover having an opening and a peripheral wall surrounding the opening; a body that fits into the opening, The protrusion is provided on the body. An electrical device according to any one of the preceding claims.

18. An electric device according to any one of claims 1 to 17, The electronic component is a fixed contact provided on the fixed terminal; a movable contact facing the fixed contact, The fixed terminal is held by the body. Electromagnetic relay.

Images