Noise reduction device
The noise reduction device addresses the challenge of combining heat and vibration resistance by using a divided case member with cantilever snap fits and reinforcing structures, enhancing durability in vehicles.
Patent Information
- Application Number
- JP2022033181
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2022-03-04
- Publication Date
- 2026-02-25
- Estimated Expiration
- 2042-03-04
AI Technical Summary
In-vehicle noise reduction devices face challenges in achieving both heat resistance and vibration resistance due to the use of hard resins, which make it difficult to adopt a hinged structure for the case member, and they are required to be divided into upper and lower parts.
A noise reduction device with a magnetic core and a case member composed of two U-shaped cores, where the case is divided into upper and lower halves joined by cantilever snap fits with reinforcing structures, including recesses and protrusions, to enhance vibration resistance.
The device provides enhanced vibration resistance by restricting movement of the snap fits, alleviating stress and preventing damage, ensuring durability under vehicular conditions.
Smart Images
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Abstract
Description
[Technical Field]
[0001] The present invention relates to a noise reduction device, and more particularly to an in-vehicle noise reduction device. [Background technology]
[0002] An in-vehicle noise elimination device is disclosed, for example, in Patent Document 1. In the noise elimination device of Patent Document 1, not only is the magnetic core divided into upper and lower parts, but the case member that houses the magnetic core is also divided into upper and lower parts. [Prior art documents] [Patent documents]
[0003] [Patent Document 1] Patent No. 6735971 Summary of the Invention [Problem to be solved by the invention]
[0004] In recent years, there has been an increasing demand for heat resistance in in-vehicle noise removal devices. To meet such heat resistance requirements, hard resins are generally selected. Therefore, it is difficult to adopt a hinged structure for the case member that houses the magnetic core, and it is necessary to separate the case into upper and lower parts, as in Patent Document 1.
[0005] On the other hand, noise reduction devices for vehicles are used under conditions of considerable vibration, and therefore, they are required to have vibration resistance so that they will not break or come apart even under such conditions.
[0006] An object of the present invention is to provide a noise removal device that has a case member that is divided into upper and lower parts and has a structure that has high vibration resistance. [Means for solving the problem]
[0007] The present invention provides a first noise removal device, A noise elimination device comprising: a magnetic core having a through hole extending in a front-rear direction; and a case member accommodating the magnetic core; the noise elimination device being used by inserting a conductor into the through hole, The magnetic core includes a first core and a second core, each of the first core and the second core has a U-shaped cross section in a vertical plane perpendicular to the front-rear direction, the case member includes a first case that houses the first core, and a second case that houses the second core and is combined with the first case in a vertical direction perpendicular to the front-rear direction, the first case has a right lower end portion, a left lower end portion, a first right engaging portion, and a first left engaging portion; a first right reinforcing portion and a first left reinforcing portion are provided at the right lower end portion and the left lower end portion, respectively; the second case has a right upper end, a left upper end, a second right engagement portion, and a second left engagement portion; the right upper end portion and the left upper end portion face the right lower end portion and the left lower end portion, respectively, when the first case and the second case are combined; a second right reinforcing portion and a second left reinforcing portion are provided at the right upper end portion and the left upper end portion, respectively; the first right engagement portion and the second right engagement portion constitute a right cantilever snap fit, the first left engagement portion and the second left engagement portion form a left cantilever snap fit, one of the first right-side reinforcing portion and the second right-side reinforcing portion is a right-side recess and the other is a right-side protrusion, one of the first left reinforcing portion and the second left reinforcing portion is a left concave portion, and the other is a left convex portion; the right convex portion is surrounded by the right concave portion in a horizontal plane perpendicular to the up-down direction, the right protrusion is received in the right recess and reinforces the right cantilever snap fit; the left convex portion is surrounded by the left concave portion in the horizontal plane, The left protrusion is received in the left recess and reinforces the left cantilever snap fit. A noise removal device is provided.
[0008] The present invention also provides a second noise removal device, which is the first noise removal device, The left recess is closed in the horizontal plane. A noise removal device is provided.
[0009] Furthermore, the present invention provides a third noise removal device, which is the first or second noise removal device, Each of the right-side convex portion and the left-side convex portion is a rectangular parallelepiped convex portion. A noise removal device is provided.
[0010] Furthermore, the present invention provides a fourth noise removal device, which is any one of the first to third noise removal devices, The case member is provided with a fixing portion, The fixing portion has a through-hole that penetrates in the vertical direction and through which a fixing tool is inserted when fixing the noise removal device to an object. A noise removal device is provided.
[0011] Furthermore, the present invention provides a fifth noise removal device, which is the fourth noise removal device, The fixing portion fixes only one of the first case and the second case to the object. A noise removal device is provided.
[0012] Furthermore, the present invention provides a sixth noise removal device, which is the fourth or fifth noise removal device, the case member has a peripheral surface, the fixing portion is provided so as to extend from the peripheral surface into the horizontal plane, The case member is formed with a rib extending from the circumferential surface to the fixing portion. A noise removal device is provided.
[0013] Furthermore, the present invention provides a seventh noise removal device, which is any one of the first to sixth noise removal devices, each of the right cantilever snap fit and the left cantilever snap fit has two engagement structures positioned apart from each other in the front-to-rear direction; Each of the engagement structures has a hook portion having an elastically deformable plate portion and a claw portion supported by the plate portion, and a hooked portion on which the claw portion is hooked, the plate portion has a first size in the up-down direction and a second size in a direction perpendicular to the up-down direction, The first size is larger than the second size. A noise removal device is provided.
[0014] Furthermore, the present invention provides an eighth noise removal device, which is any one of the first to seventh noise removal devices, The height of the right convex portion is smaller than the depth of the right concave portion, The height of the left convex portion is smaller than the depth of the left concave portion. A noise removal device is provided. [Effects of the Invention]
[0015] The case member of the noise removal device of the present invention is composed of a first case and a second case divided into upper and lower halves. The first case and the second case are joined together by a right-side cantilever snap fit and a left-side cantilever snap fit. One of the first case and the second case is formed with a right-side recess, and the other is formed with a right-side protrusion. Furthermore, one of the first case and the second case is formed with a left-side recess, and the other is formed with a left-side protrusion. The right-side protrusion is surrounded by the right-side recess in the horizontal plane. The left-side protrusion is surrounded by the left-side recess in the horizontal plane. Therefore, the right-side protrusion received in the right-side recess and the left-side protrusion received in the left-side recess are restricted from moving in the horizontal plane, thereby relieving and reinforcing the stress applied to the right-side cantilever snap fit and the left-side cantilever snap fit, respectively. [Brief explanation of the drawings]
[0016] [Figure 1] 1 is a perspective view showing a noise removal device according to an embodiment of the present invention; [Figure 2] FIG. 2 is a front view showing the noise removal device of FIG. [Figure 3] FIG. 3 is a cross-sectional view showing a part of the noise removal device of FIG. 2. [Figure 4] 3 is a cross-sectional view showing another part of the noise removal device of FIG. 2. FIG. [Figure 5] FIG. 2 is a top view showing the noise removal device of FIG. [Figure 6] FIG. 2 is a bottom view showing the noise removal device of FIG. [Figure 7] FIG. 2 is a right side view showing the noise removal device of FIG. [Figure 8] FIG. 2 is a left side view showing the noise removal device of FIG. [Figure 9] FIG. 2 is a rear view showing the noise removal device of FIG. [Figure 10] FIG. 2 is an exploded perspective view showing the noise removal device of FIG. [Figure 11] 11 is a front view showing a first case included in the noise removal device of FIG. 10. FIG. [Figure 12]FIG. 12 is a left side view showing the first case of FIG. 11. [Figure 13] FIG. 12 is a perspective view showing the bottom of the first case of FIG. 11. [Figure 14] 14 is an enlarged view showing a portion of the first case surrounded by a dashed line A in FIG. 13. FIG. [Figure 15] 12 is another perspective view of the bottom of the first case of FIG. 11. FIG. [Figure 16] 16 is an enlarged view showing a portion of the first case surrounded by a dashed line B in FIG. 15. FIG. [Figure 17] 11 is a perspective view showing a second case included in the noise removal device of FIG. 10. FIG. [Figure 18] 18 is an enlarged view showing a portion of the second case surrounded by a dashed line C in FIG. 17. FIG. [Figure 19] 18 is an enlarged view showing a portion of the second case surrounded by a dashed line D in FIG. 17. FIG. DETAILED DESCRIPTION OF THE INVENTION
[0017] 2 and 10, a noise elimination device 100 according to an embodiment of the present invention includes a magnetic core 700 having a through hole 705 extending in the front-rear direction, and a case member 200 that houses the magnetic core 700. The noise elimination device 100 of this embodiment is used by inserting a conductor (not shown) into the through hole 705. In this embodiment, the front-rear direction is the X direction. Here, the front is the +X direction, and the rear is the -X direction.
[0018] 10, the magnetic core 700 of this embodiment includes a first core 710 and a second core 720. The first core 710 and the second core 720 are separate from each other.
[0019] 10, the first core 710 of this embodiment has a U-shaped cross section in a vertical plane perpendicular to the front-rear direction. In this embodiment, the vertical plane is the YZ plane. The first core 710 is located above the second core 720 in the up-down direction perpendicular to the front-rear direction. In this embodiment, the up-down direction is the Z direction. Here, the up is the +Z direction and the down is the -Z direction.
[0020] 10, second core 720 of the present embodiment has a U-shaped cross section in a vertical plane perpendicular to the front-rear direction. Second core 720 is located below first core 710 in the up-down direction.
[0021] As shown in Figure 1, the case member 200 has a peripheral surface 210. With reference to Figures 2 and 7 to 9, the peripheral surface 210 includes a front surface 212, a rear surface 214, a right side surface 216, and a left side surface 218.
[0022] As shown in FIG. 2, the front surface 212 of this embodiment faces forward in the front-to-rear direction.
[0023] 9, the rear surface 214 of this embodiment faces rearward in the front-to-rear direction. The rear surface 214 is located rearward of the front surface 212 in the front-to-rear direction.
[0024] As shown in FIG. 7, the right side surface 216 in this embodiment faces right in the left-right direction. In this embodiment, the left-right direction is the Y direction. Here, the right side is the +Y direction and the left side is the -Y direction. As shown in FIG. 5, the right side surface 216 is located to the right of the left side surface 218 in the left-right direction. The right side surface 216 is located between the front surface 212 and the rear surface 214 in the front-rear direction. The right side surface 216 is located behind the front surface 212 in the front-rear direction. The right side surface 216 is located in front of the rear surface 214 in the front-rear direction.
[0025] As shown in Fig. 8, the left side surface 218 of this embodiment faces left in the left-right direction. As shown in Fig. 5, the left side surface 218 is located to the left of the right side surface 216 in the left-right direction. The left side surface 218 is located between the front surface 212 and the rear surface 214 in the front-rear direction. The left side surface 218 is located rearward of the front surface 212 in the front-rear direction. The left side surface 218 is located forward of the rear surface 214 in the front-rear direction.
[0026] As shown in FIG. 10, the case member 200 of this embodiment includes a first case 300 and a second case 400.
[0027] 10, first case 300 of the present embodiment houses first core 710. First case 300 is located above second case 400 in the up-down direction. As shown in FIG. 13, first case 300 has a right-side lower end portion 310, a left-side lower end portion 320, a first right-side engaging portion 330, and a first left-side engaging portion 340.
[0028] As shown in FIG. 15, the right lower end portion 310 of this embodiment has a right lower surface 311.
[0029] 15, the right lower surface 311 of this embodiment faces downward in the vertical direction. The right lower surface 311 is a surface perpendicular to the vertical direction.
[0030] As can be seen from FIGS. 13 and 14, a first right reinforcing portion 312 is provided at the right lower end portion 310 of this embodiment.
[0031] As shown in Fig. 14, the first right-side reinforcing portion 312 in this embodiment is a right-side recess 312. That is, the first right-side reinforcing portion 312 is recessed upward in the up-down direction from the right-side lower surface 311. With reference to Figs. 13 and 14, the right-side recess 312 is located near the right end of the first case 300 in the left-right direction. Note that the right-side recess 312 is not closed in a horizontal plane perpendicular to the up-down direction. That is, the right-side recess 312 is partially open in the horizontal plane. The right-side recess 312 communicates with the outside of the first case 300 in the left-right direction. In this embodiment, the horizontal plane is the XY plane.
[0032] As shown in FIG. 14, the right recess 312 has a right upper surface 3122 and a peripheral wall 314 .
[0033] 14, the right upper surface 3122 of this embodiment faces downward in the vertical direction. The right upper surface 3122 defines the upper end of the right recess 312 in the vertical direction.
[0034] As shown in FIG. 14, the peripheral wall 314 has a right front surface 3123 , a right rear surface 3124 , a right inner surface 3125 , and a right outer surface 3126 .
[0035] 14, the right front surface 3123 in this embodiment faces rearward in the front-rear direction. The right front surface 3123 defines the front end of the right recess 312 in the front-rear direction. The right front surface 3123 is directly connected to the right inner surface 3125. The right front surface 3123 is not directly connected to the right outer surface 3126. The right front surface 3123 is connected to the right outer surface 3126 only via the right upper surface 3122.
[0036] 14, the right rear surface 3124 in this embodiment faces forward in the front-to-rear direction. The right rear surface 3124 defines the rear end of the right recess 312 in the front-to-rear direction. The right rear surface 3124 is directly connected to the right inner surface 3125. The right rear surface 3124 is not directly connected to the right outer surface 3126. The right rear surface 3124 is connected to the right outer surface 3126 only via the right upper surface 3122.
[0037] 14, the right inner surface 3125 in this embodiment faces right in the left-right direction. The right inner surface 3125 defines the inner end of the right recess 312 in the left-right direction. The right inner surface 3125 defines the left end of the right recess 312 in the left-right direction. The right inner surface 3125 is directly connected to the right front surface 3123. The right inner surface 3125 is directly connected to the right rear surface 3124.
[0038] As shown in FIG. 14 , the right outer surface 3126 in this embodiment faces left in the left-right direction. The right outer surface 3126 defines the outer end of the right recess 312 in the left-right direction. The right outer surface 3126 defines the right end of the right recess 312 in the left-right direction. The right outer surface 3126 is not directly connected to the right front surface 3123. The right outer surface 3126 is connected to the right front surface 3123 only via the right upper surface 3122. The right outer surface 3126 is not directly connected to the right rear surface 3124. The right outer surface 3126 is connected to the right rear surface 3124 only via the right upper surface 3122.
[0039] As shown in FIG. 15, the left lower end portion 320 of this embodiment has a left lower surface 321.
[0040] 15, the left lower surface 321 of this embodiment faces downward in the vertical direction. The left lower surface 321 is a surface perpendicular to the vertical direction.
[0041] As can be seen from FIGS. 15 and 16, a first left reinforcing portion 322 is provided on the left lower end portion 320 of this embodiment.
[0042] As shown in Fig. 16, the first left-side reinforcing part 322 in this embodiment is a left-side recess 322. That is, the first left-side reinforcing part 322 is recessed upward in the up-down direction from the left-side lower surface 321. With reference to Figs. 15 and 16, the left-side recess 322 is located near the left end in the left-right direction of the first case 300. The left-side recess 322 is closed in a horizontal plane perpendicular to the up-down direction.
[0043] As shown in FIG. 16, the left recess 322 has a left upper surface 3222 and a peripheral wall 324 .
[0044] 16, the left upper surface 3222 of this embodiment faces downward in the vertical direction and defines the upper end of the left recess 322 in the vertical direction.
[0045] As shown in FIG. 16, the peripheral wall 324 has a left front surface 3223 , a left rear surface 3224 , a left inner surface 3225 , and a left outer surface 3226 .
[0046] 16 , the left front surface 3223 in this embodiment faces rearward in the front-rear direction. The left front surface 3223 defines the front end of the left recess 322 in the front-rear direction. The left front surface 3223 is directly connected to the left inner surface 3225. The left front surface 3223 is directly connected to the left outer surface 3226.
[0047] 16 , the left rear surface 3224 in this embodiment faces forward in the front-to-rear direction. The left rear surface 3224 defines the rear end of the left recess 322 in the front-to-rear direction. The left rear surface 3224 is directly connected to the left inner surface 3225. The left rear surface 3224 is directly connected to the left outer surface 3226.
[0048] 16, the left inner surface 3225 in this embodiment faces left in the left-right direction. The left inner surface 3225 defines the inner end of the left recess 322 in the left-right direction. The left inner surface 3225 defines the right end of the left recess 322 in the left-right direction. The left inner surface 3225 is directly connected to the left front surface 3223. The left inner surface 3225 is directly connected to the left rear surface 3224.
[0049] 16, the left outer surface 3226 in this embodiment faces right in the left-right direction. The left outer surface 3226 defines the outer end of the left recess 322 in the left-right direction. The left inner surface 3225 defines the left end of the left recess 322 in the left-right direction. The left outer surface 3226 is directly connected to the left front surface 3223. The left outer surface 3226 is directly connected to the left rear surface 3224.
[0050] As described above, the left front surface 3223 is directly connected to both the left inner surface 3225 and the left outer surface 3226, and the left rear surface 3224 is directly connected to both the left inner surface 3225 and the left outer surface 3226. In other words, the left recess 322 has peripheral walls 324 in all directions within the horizontal plane.
[0051] As shown in FIG. 13, the first right engagement portion 330 of this embodiment is located at the right end of the right lower end portion 310 in the left-right direction.
[0052] 13, the first left engagement portion 340 of this embodiment is located at the left end of the left-hand lower end portion 320 in the left-right direction. The first right engagement portion 330 and the first left engagement portion 340 are aligned in the left-right direction.
[0053] 10, second case 400 of the present embodiment houses second core 720. Second case 400 is located below first case 300 in the up-down direction. Referring to FIGS. 1 and 10, second case 400 is combined with first case 300 in the up-down direction perpendicular to the front-rear direction.
[0054] 6 and 17, the second case 400 has a right upper end portion 410, a left upper end portion 420, a second right engagement portion 430, and a second left engagement portion 440.
[0055] As shown in Fig. 17, in this embodiment, the right upper end portion 410 is located to the right of the left upper end portion 420 in the left-right direction. The right upper end portion 410 and the left upper end portion 420 are aligned in the left-right direction. The right upper end portion 410 defines the right end of the second case 400 in the left-right direction. As shown in Fig. 7, the right upper end portion 410 faces the right lower end portion 310 when the first case 300 and the second case 400 are combined.
[0056] As shown in FIG. 17, the right upper end portion 410 has a right upper surface 411 .
[0057] 17, in this embodiment, right upper surface 411 faces upward in the vertical direction. Right upper surface 411 is a surface perpendicular to the vertical direction. As shown in FIG. 3, when first case 300 and second case 400 are combined, right upper surface 411 contacts right lower surface 311.
[0058] 17 and 18, the right upper end portion 410 is provided with a second right reinforcing portion 412 and two right holes 414.
[0059] As shown in FIG. 18 , the second right-side reinforcement portion 412 in this embodiment is a right-side protrusion 412. That is, the second right-side reinforcement portion 412 protrudes upward in the up-down direction from the right-side upper surface 411. The right-side protrusion 412 defines the upper end of the right-side upper end portion 410 in the up-down direction. The right-side protrusion 412 is a rectangular parallelepiped protrusion. That is, the size of the right-side protrusion 412 in the front-rear direction is greater than the size in the left-right direction. As shown in FIG. 17 , the right-side protrusion 412 is located near the right end of the second case 400 in the left-right direction. As shown in FIG. 3 , when the first case 300 and the second case 400 are combined, the right-side protrusion 412 is received in the right-side recess 312. The height RH of the right-side protrusion 412 is smaller than the depth RD of the right-side recess 312. The right-side protrusion 412 is surrounded by the right-side recess 312 in the horizontal plane. That is, the right convex portion 412 is surrounded by the peripheral wall 314 in the horizontal plane. As a result, the right convex portion 412 received in the right recess 312 is restricted from moving in the horizontal plane. More specifically, the right convex portion 412 received in the right recess 312 is restricted from moving in all directions in the horizontal plane. As shown in FIG. 7 , when the noise removal device 100 is viewed from the right in the left-right direction, a portion of the right convex portion 412 is visible.
[0060] As described above, the right recess 312 is not closed in the horizontal plane. However, the present invention is not limited to this, and the right recess 312 may be closed in the horizontal plane. In other words, the right recess 312 may have a peripheral wall 314 in all directions in the horizontal plane. By configuring the right recess 312 in this manner, it is possible to more firmly restrict the movement of the right protrusion 412 received in the right recess 312 in all directions in the horizontal plane.
[0061] As described above, when first case 300 and second case 400 are combined, right side protrusion 412, which is a rectangular parallelepiped protrusion, is received in right side recess 312. This ensures a large total surface area for the opposing faces of right side recess 312 and right side protrusion 412 in a limited space.
[0062] As shown in FIG. 18, the right protrusion 412 has a right upper surface 4122 , a right front surface 4123 , a right rear surface 4124 , a right inner surface 4125 , and a right outer surface 4126 .
[0063] As shown in Fig. 18, the right upper surface 4122 in this embodiment faces upward in the vertical direction. The right upper surface 4122 defines the upper end of the right protrusion 412 in the vertical direction. As shown in Fig. 3, when the first case 300 and the second case 400 are combined, the right upper surface 3122 and the right upper surface 4122 face each other in the vertical direction. When the first case 300 and the second case 400 are combined, the right upper surface 4122 and the right upper surface 4122 do not come into contact with each other.
[0064] 18, the right front surface 4123 in this embodiment faces forward in the front-to-rear direction. The right front surface 4123 defines the front end of the right protrusion 412 in the front-to-rear direction. With reference to FIGS. 10, 14, and 18, when the first case 300 and the second case 400 are combined, the right front surface 3123 and the right front surface 4123 face each other in the front-to-rear direction.
[0065] 18, in this embodiment, right rear surface 4124 faces rearward in the front-to-rear direction. Right rear surface 4124 defines the rear end of right protrusion 412 in the front-to-rear direction. With reference to FIGS. 10, 14, and 18, when first case 300 and second case 400 are combined, right rear surface 3124 and right rear surface 4124 face each other in the front-to-rear direction.
[0066] 18, the right inner surface 4125 in this embodiment faces left in the left-right direction. The right inner surface 4125 defines the inner end of the right protrusion 412 in the left-right direction. The right inner surface 4125 defines the left end of the right protrusion 412 in the left-right direction. As shown in FIG. 3, when the first case 300 and the second case 400 are combined, the right inner surface 3125 and the right inner surface 4125 face each other in the left-right direction.
[0067] 18, in this embodiment, the right outer surface 4126 faces right in the left-right direction. The right outer surface 4126 defines the outer end of the right protrusion 412 in the left-right direction. The right outer surface 4126 defines the right end of the right protrusion 412 in the left-right direction. As shown in FIG. 3, when the first case 300 and the second case 400 are combined, the right outer surface 3126 and the right outer surface 4126 face each other in the left-right direction.
[0068] As shown in Fig. 17, the right holes 414 in this embodiment are aligned in the front-rear direction. With reference to Figs. 17 and 18, the right protrusion 412 is located between the two right holes 414 in the front-rear direction. The right protrusion 412 is located inside the right hole 414 in the left-right direction. In other words, the right protrusion 412 is located to the left of the right hole 414 in the left-right direction.
[0069] 17, in this embodiment, the left upper end portion 420 is located to the left of the right upper end portion 410 in the left-right direction. The left upper end portion 420 defines the left end of the second case 400 in the left-right direction. As shown in FIG. 8, the left upper end portion 420 faces the left lower end portion 320 when the first case 300 and the second case 400 are combined.
[0070] As shown in FIG. 17, the left upper end 420 has a left upper surface 421 .
[0071] 17, in this embodiment, left upper surface 421 faces upward in the vertical direction. Left upper surface 421 is a surface perpendicular to the vertical direction. As shown in FIG. 4, when first case 300 and second case 400 are combined, left upper surface 421 contacts left lower surface 321.
[0072] As shown in FIGS. 17 and 19, the left upper end portion 420 is provided with a second left reinforcing portion 422 and two left holes 424.
[0073] As shown in FIG. 19 , the second left-side reinforcement portion 422 in this embodiment is a left-side protrusion 422. That is, the second left-side reinforcement portion 422 protrudes upward in the up-down direction from the left-side upper surface 421. The left-side protrusion 422 defines the upper end of the left-side upper end portion 420 in the up-down direction. The left-side protrusion 422 is a rectangular parallelepiped protrusion. That is, the size of the left-side protrusion 422 in the front-to-rear direction is larger than the size in the left-to-right direction. As shown in FIG. 17 , the left-side protrusion 422 is located near the left end of the second case 400 in the left-to-right direction. With reference to FIGS. 17 to 19 , the right-side protrusion 412 and the left-side protrusion 422 are aligned in the left-to-right direction. With reference to FIG. 4 , when the first case 300 and the second case 400 are combined, the left-side protrusion 422 is received in the left-side recess 322. The height LH of the left-side protrusion 422 is smaller than the depth LD of the left-side recess 322. The left convex portion 422 is surrounded by the left recess 322 in the horizontal plane. That is, the left convex portion 422 is surrounded by the peripheral wall 324 in all directions in the horizontal plane. As a result, the left convex portion 422 received in the left recess 322 is restricted from moving in the horizontal plane. More specifically, the left convex portion 422 received in the left recess 322 is restricted from moving in all directions in the horizontal plane. With reference to FIGS. 4 and 8, when the noise removal device 100 is viewed from the left in the left-right direction, the left convex portion 422 is not visible.
[0074] As described above, the left recess 322 is closed in the horizontal plane. However, the present invention is not limited to this. That is, as long as the movement of the left protrusion 422 received in the left recess 322 in all directions in the horizontal plane is restricted, the left recess 322 may be partially open in the horizontal plane, or the left recess 322 may communicate with the outside of the first case 300 in a direction perpendicular to the up-down direction. In other words, as long as the movement of the left protrusion 422 received in the left recess 322 in all directions in the horizontal plane is restricted, the left recess 322 may have an opening that communicates with the outside of the first case 300. Note that, specifically, the size of this opening must be smaller than the size of the left protrusion 422 in the horizontal plane.
[0075] As described above, when first case 300 and second case 400 are combined, left convex portion 422, which is a rectangular parallelepiped convex portion, is received in left concave portion 322. This ensures a large total surface area for the opposing faces of left concave portion 322 and left convex portion 422 in a limited space.
[0076] As shown in FIG. 19, the left protrusion 422 has a left upper surface 4222 , a left front surface 4223 , a left rear surface 4224 , a left inner surface 4225 , and a left outer surface 4226 .
[0077] 19, in this embodiment, left upper surface 4222 faces upward in the vertical direction. Left upper surface 4222 defines the upper end of left protrusion 422 in the vertical direction. As shown in FIG. 4, when first case 300 and second case 400 are combined, left upper surface 3222 and left upper surface 4222 face each other in the vertical direction. When first case 300 and second case 400 are combined, left upper surface 4222 does not come into contact with left upper surface 3222.
[0078] 19, left front surface 4223 in this embodiment faces forward in the front-to-rear direction. Left front surface 4223 defines the front end in the front-to-rear direction of left protrusion 422. With reference to FIGS. 10, 16, and 19, when first case 300 and second case 400 are combined, left front surface 3223 and left front surface 4223 face each other in the front-to-rear direction.
[0079] 19, left rear surface 4224 in this embodiment faces rearward in the front-to-rear direction. Left rear surface 4224 defines the rear end in the front-to-rear direction of left protrusion 422. With reference to FIGS. 10, 16, and 19, when first case 300 and second case 400 are combined, left rear surface 3224 and left rear surface 4224 face each other in the front-to-rear direction.
[0080] 19, in this embodiment, left inner surface 4225 faces right in the left-right direction. Left inner surface 4225 defines the inner end of left protrusion 422 in the left-right direction. Left inner surface 4225 defines the right end of left protrusion 422 in the left-right direction. As shown in FIG. 4, when first case 300 and second case 400 are combined, left inner surface 3225 and left inner surface 4225 face each other in the left-right direction.
[0081] 19, in this embodiment, left outer surface 4226 faces left in the left-right direction. Left outer surface 4226 defines the outer end of left protrusion 422 in the left-right direction. Left inner surface 4225 defines the left end of left protrusion 422 in the left-right direction. As shown in FIG. 4, when first case 300 and second case 400 are combined, left outer surface 3226 and left outer surface 4225 face each other in the left-right direction.
[0082] As shown in Fig. 17, the left holes 424 in this embodiment are aligned in the front-rear direction. With reference to Figs. 17 and 19, the left protrusion 422 is located between the two left holes 424 in the front-rear direction. The left protrusion 422 is located inside the left hole 424 in the left-right direction. In other words, the left protrusion 422 is located to the right of the left hole 424 in the left-right direction.
[0083] As shown in FIG. 7, the second right engagement portion 430 in this embodiment is located at the right end of the right upper end portion 410. As shown in FIG. 6, the second right engagement portion 430 and the second left engagement portion 440 are aligned in the left-right direction. The second right engagement portion 430 is located at the same position as the first right engagement portion 330 in the left-right direction. Referring to FIG. 7, the first right engagement portion 330 and the second right engagement portion 430 form the right cantilever snap fit 510. As described above, the right protrusion 412 is received in the right recess 312, thereby reinforcing the right cantilever snap fit 510.
[0084] As described above, movement in the horizontal plane of the right convex portion 412 received in the right concave portion 312 is restricted. As a result, even if vibrations in the horizontal plane are applied to the noise removal device 100, the stress applied to the right cantilever snap fit 510 is alleviated, and damage to the right cantilever snap fit 510 is avoided.
[0085] 7, the right cantilever snap fit 510 has two engagement structures 520 spaced apart from each other in the front-to-rear direction. The right protrusion 412 is located between the two engagement structures 520 in the front-to-rear direction. Referring to FIGS. 7 and 17, the engagement structures 520 correspond to the right holes 414, respectively.
[0086] As shown in FIG. 7, each of the engagement structures 520 has a hook portion 530 and a hooked portion 540 .
[0087] 13, the hook portion 530 of this embodiment is provided on the first case 300. The hook portion 530 has a plate portion 532 and a claw portion 534.
[0088] 11 and 12, the plate portion 532 of this embodiment is elastically deformable. The plate portion 532 has a first size SR1 in the vertical direction and a second size SR2 in the direction perpendicular to the vertical direction. More specifically, the plate portion 532 has the first size SR1 in the vertical direction and the second size SR2 in the front-rear direction. The first size SR1 is larger than the second size SR2. This allows the plate portion 532 to easily elastically deform. Referring to FIGS. 7, 13, and 17, each plate portion 532 of the engagement structure 520 is received in the corresponding right hole 414.
[0089] 11, the claw portion 534 in this embodiment defines the bottom end of the hook portion 530 in the up-down direction. The claw portion 534 defines the bottom end of the first case 300 in the up-down direction. The claw portion 534 protrudes outward in the left-right direction. In other words, the claw portion 534 protrudes to the right in the left-right direction. The claw portion 534 is supported by the plate portion 532.
[0090] 7, hooked portion 540 of the present embodiment is provided on second case 400. Hooked portion 540 is a portion on which claw portion 534 is hooked.
[0091] As shown in Fig. 6, the second left engagement portion 440 in this embodiment is located at the left end of the left upper end portion 420. As shown in Fig. 8, the second left engagement portion 440 is located at the same position as the first left engagement portion 340 in the left-right direction. The first left engagement portion 340 and the second left engagement portion 440 form a left cantilever snap fit 550. As described above, the left protrusion 422 is received in the left recess 322, thereby reinforcing the left cantilever snap fit 550.
[0092] As described above, movement in the horizontal plane of the left convex portion 422 received in the left concave portion 322 is restricted. As a result, even if vibrations in the horizontal plane are applied to the noise removal device 100, the stress applied to the left cantilever snap fit 550 is alleviated, and damage to the left cantilever snap fit 550 is prevented.
[0093] In particular, in this embodiment, right-side protrusion 412 located near the right end of second case 400 is restricted from moving in the horizontal plane, and left-side protrusion 422 located near the left end of second case 400 is also restricted from moving in the horizontal plane. As a result, even if vibrations are applied to noise removal device 100 in the horizontal plane, the stress applied to cantilever snap fits 510, 550 is further alleviated, and damage to cantilever snap fits 510, 550 is more effectively prevented.
[0094] As shown in Fig. 8, the left cantilever snap fit 550 has two engagement structures 560 that are spaced apart from each other in the front-to-rear direction. As described above, the right cantilever snap fit 510 has two engagement structures 520, and therefore the noise removal device 100 has four engagement structures 520, 560. With reference to Figs. 8, 17, and 19, the left protrusion 422 is located between the two engagement structures 560 in the front-to-rear direction. The engagement structures 560 correspond to the left holes 424, respectively.
[0095] As shown in FIG. 8, each of the engagement structures 560 has a hook portion 570 and a hooked portion 580 .
[0096] 12, hook portion 570 of this embodiment is provided on first case 300. Hook portion 570 has a plate portion 572 and a claw portion 574.
[0097] 11 and 12, the plate portion 572 of this embodiment is elastically deformable. The plate portion 572 has a first size SL1 in the up-down direction and a second size SL2 in the direction perpendicular to the up-down direction. More specifically, the plate portion 572 has the first size SL1 in the up-down direction and the second size SL2 in the front-rear direction. The first size SL1 is larger than the second size SL2. This allows the plate portion 572 to easily elastically deform. Referring to FIGS. 8, 15, and 17, each plate portion 572 of the engagement structure 560 is received in the corresponding left hole 424.
[0098] As described above, the noise elimination device 100 has four engagement structures 520, 560. This prevents the concentration of load on each of the plate pieces 532, 572, which are easily elastically deformable.
[0099] 11 , the claw portion 574 in this embodiment defines the lower end of the hook portion 570 in the up-down direction. The claw portion 574 protrudes outward in the left-right direction. That is, the claw portion 574 protrudes to the left in the left-right direction. The claw portion 574 is supported by the plate portion 572.
[0100] 8, hooked portion 580 of the present embodiment is provided on second case 400. Hooked portion 580 is a portion on which claw portion 574 is hooked.
[0101] As shown in FIG. 1, the case member 200 is provided with a fixing portion 600 .
[0102] Referring to FIG. 5 , the fixing portion 600 of this embodiment has through-holes 610 that penetrate in the vertical direction. The through-holes 610 are formed to insert fixing devices (not shown) when fixing the noise reduction device 100 to an object (not shown). Examples of fixing devices include bolts. Specifically, the noise reduction device 100 is fixed to the object by fastening a bolt inserted into the through-hole 610 to a screw hole provided in the object, such as a housing. As shown in FIG. 10 , the fixing portions 600 are provided on the first case 300. That is, each fixing portion 600 fixes only the first case 300 to the object. The second case 400 does not have fixing portions 600. As shown in FIG. 5 , the fixing portions 600 are provided to extend in a horizontal plane from the peripheral surface 210. The front fixing portion 600 extends forward from the front surface 212. The front fixing portion 600 extends leftward from the left side surface 218. The rear fixing portion 600 extends rearward from the rear surface 214. The rear fixing portion 600 extends rightward from the right side surface 216.
[0103] The noise removal device 100 of this embodiment is fixed to an object in the vertical direction by the fixing part 600. As a result, when vertical vibrations are applied to the noise removal device 100, the stress applied to the cantilever snap fits 510, 550 is alleviated by the fixing part 600. Regarding vibrations in the horizontal plane applied to the noise removal device 100, as described above, the combination of the right recess 312 and the right protrusion 412 and the combination of the left recess 322 and the left protrusion 422 alleviates the stress applied to the cantilever snap fits 510, 550. That is, in the noise removal device 100 of this embodiment, the direction of vibration corresponding to the stress alleviated by the combination of the right recess 312 and the right protrusion 412 is perpendicular to the direction of vibration corresponding to the stress alleviated by the fixing part 600. In other words, the direction of vibration corresponding to the stress alleviated by the combination of the right recess 312 and the right protrusion 412 is complementary to the direction of vibration corresponding to the stress alleviated by the fixing part 600. Similarly, in the noise removal device 100 of this embodiment, the direction of vibration corresponding to the stress relieved by the combination of the left recess 322 and the left protrusion 422 is perpendicular to the direction of vibration corresponding to the stress relieved by the fixed part 600. In other words, the directions of vibration corresponding to the stress relieved by the combination of the left recess 322 and the left protrusion 422 and the fixed part 600 are complementary to each other.
[0104] As shown in FIG. 7, the case member 200 is formed with a rib 250 .
[0105] 7, the ribs 250 of this embodiment extend from the peripheral surface 210 to the fixing portion 600. The front rib 250 extends from the front surface 212 to the front fixing portion 600. The rear rib 250 extends from the rear surface 214 to the rear fixing portion 600.
[0106] In the noise elimination device 100 of this embodiment, the connecting portion between the peripheral surface 210 of the case member 200 and the fixing portion 600 is reinforced by the above-mentioned rib 250. This prevents damage to the connecting portion even when the noise elimination device 100 is subjected to vibrations in the up and down directions.
[0107] Although the present invention has been specifically described above with reference to the embodiment, the present invention is not limited to this and various modifications and changes are possible.
[0108] In the above-described embodiment, the first right-side reinforcing portion 312 is the right-side recess 312 and the second right-side reinforcing portion 412 is the right-side protrusion 412. However, the present invention is not limited to this. The first right-side reinforcing portion 312 may be the right-side protrusion and the second right-side reinforcing portion 412 may be the right-side recess. That is, it is sufficient that one of the first right-side reinforcing portion 312 and the second right-side reinforcing portion 412 is the right-side recess and the other is the right-side protrusion. This allows the same effects as those of the above-described embodiment to be obtained.
[0109] In the above-described embodiment, the first left-side reinforcing portion 322 is the left-side recess 322 and the second left-side reinforcing portion 422 is the left-side protrusion 422. However, the present invention is not limited to this. The first left-side reinforcing portion 322 may be the left-side protrusion and the second left-side reinforcing portion 422 may be the left-side recess. That is, it is sufficient that one of the first left-side reinforcing portion 322 and the second left-side reinforcing portion 422 is the left-side recess and the other is the left-side protrusion. This allows the same effects as those of the above-described embodiment to be obtained.
[0110] In the above-described embodiment, hook portions 530, 570 are provided on first case 300, and hooked portions 540, 580 are provided on second case 400, but the present invention is not limited to this. That is, hooked portion 540 may be provided on first case 300, and hook portion 530 may be provided on second case 400. Similarly, hooked portion 580 may be provided on first case 300, and hook portion 570 may be provided on second case 400.
[0111] While the fixing portion 600 in the above-described embodiment fixes only the first case 300 to the object, the present invention is not limited to this. The fixing portion 600 may fix only the second case 400 to the object. That is, it is sufficient that the fixing portion 600 fixes only one of the first case 300 and the second case 400 to the object. In this case, if vibrations are applied in a horizontal plane to a noise removal device 100 that does not have the first right-side reinforcing portion 312, the first left-side reinforcing portion 322, the second right-side reinforcing portion 412, and the second left-side reinforcing portion 422, the stress in the other of the first case 300 and the second case 400 that is not fixed to the object by the fixing portion 600 is not alleviated, and the cantilever snap fits 510 and 550 may be subjected to the stress and may be damaged. However, since the noise elimination device 100 of this embodiment has the first right-side reinforcement portion 312, the first left-side reinforcement portion 322, the second right-side reinforcement portion 412, and the second left-side reinforcement portion 422, even if the fixing portion 600 fixes only one of the first case 300 and the second case 400 to an object, stress on the other of the first case 300 and the second case 400 due to vibrations in the horizontal plane applied to the noise elimination device 100 is alleviated, preventing damage to the cantilever snap fits 510, 550 and achieving the same effects as those of the above-described embodiment. It is also possible to provide the fixing portion 600 on the case member 200 for fixing only one of the first case 300 and the second case 400 to an object, and another fixing portion for fixing only the other of the first case 300 and the second case 400 to an object. In this case, the same effects as those of the above-described embodiment can be achieved. [Explanation of symbols]
[0112] 100 Noise Eliminator 200 Case material 210 Peripheral surface 212 Front 214 Rear 216 Right side 218 left side 250 ribs 300 Case 1 310 Bottom right side 311 Lower right side 312 First right reinforcing part (right concave part) 3122 Right upper surface 3123 Right front surface 3124 Right rear surface 3125 Right inner surface 3126 Right outer surface 314 Peripheral wall 320 Left lower end part 321 Left lower surface 322 First left reinforcing part (left concave part) 3222 Left upper surface 3223 Left front surface 3224 Left rear surface 3225 Left inner surface 3226 Left outer surface 324 Peripheral wall 330 First right engaging part 340 First left engaging part[[ID=,36]] 400 Second case 411 Right upper surface 410 Right upper end part '412 Second right reinforcing part (right convex part) 4122 Right upper surface 4123 Right front surface 4124 Right rear surface 4125 Right inner surface 4126 Right outer surface 414 Right hole 420 Left upper end part 421 Left upper surface 422 Second left reinforcing part (left convex part) 4222 Left upper surface 4223 Left front surface 4224 Left rear surface 4225 Left inner surface 4226 Left outer surface 424 Left hole 430 Second right engaging part 440 Second left engaging part 510 Right side cantilever snap fit 520 Engaging structure 530 Hook part 532 Plate piece part 534 Claw part 540 Hooked part 550 Left Cantilever Snap Fit 560 Engagement structure 570 Hook part 572 Plate piece 574 Claw 580 Hooked part 600 Fixed part 610 Through hole 700 magnetic core 705 Through hole 710 1st Core 720 Second Core LD Depth LH height RD Depth RH Height SL1 First size SL2 2nd size SR1 First size SR2 2nd size
Claims
1. A noise elimination device comprising: a magnetic core having a through hole extending in a front-rear direction; and a case member accommodating the magnetic core; the noise elimination device being used by inserting a conductor into the through hole, The magnetic core includes a first core and a second core, each of the first core and the second core has a U-shaped cross section in a vertical plane perpendicular to the front-rear direction, the case member includes a first case that houses the first core, and a second case that houses the second core and is combined with the first case in a vertical direction perpendicular to the front-rear direction, the first case has a right lower end portion, a left lower end portion, a first right engaging portion, and a first left engaging portion; a first right reinforcing portion and a first left reinforcing portion are provided at the right lower end portion and the left lower end portion, respectively; the second case has a right upper end, a left upper end, a second right engaging portion, and a second left engaging portion; the right upper end portion and the left upper end portion face the right lower end portion and the left lower end portion, respectively, when the first case and the second case are combined; a second right reinforcing portion and a second left reinforcing portion are provided at the right upper end portion and the left upper end portion, respectively; the first right engagement portion and the second right engagement portion constitute a right cantilever snap fit, the first left engagement portion and the second left engagement portion form a left cantilever snap fit, one of the first right-side reinforcing portion and the second right-side reinforcing portion is a right-side recess and the other is a right-side protrusion, one of the first left reinforcing portion and the second left reinforcing portion is a left concave portion and the other is a left convex portion, the right convex portion is surrounded by the right concave portion in a horizontal plane perpendicular to the up-down direction, the right protrusion is received in the right recess and reinforces the right cantilever snap fit; the left convex portion is surrounded by the left concave portion in the horizontal plane, the left protrusion is received in the left recess to reinforce the left cantilever snap fit; The case member is provided with a fixing portion, a through-hole penetrating the fixing portion in the up-down direction, through which a fixing tool is inserted when fixing the noise removal device to an object, is formed; the fixing portion is provided on the first case, The second case does not have the fixing portion. Noise removal device.
2. 2. The noise removal device according to claim 1, The left recess is closed in the horizontal plane. Noise removal device.
3. 3. The noise removal device according to claim 1, Each of the right-side convex portion and the left-side convex portion is a rectangular parallelepiped convex portion. Noise removal device.
4. The noise removal device according to any one of claims 1 to 3, The fixing portion fixes only the first case to the object. Noise removal device.
5. The noise removal device according to any one of claims 1 to 4, the case member has a peripheral surface, the fixing portion is provided so as to extend from the peripheral surface into the horizontal plane, The case member is formed with a rib extending from the circumferential surface to the fixing portion. Noise removal device.
6. The noise removal device according to any one of claims 1 to 5, each of the right cantilever snap fit and the left cantilever snap fit has two engagement structures positioned apart from each other in the front-to-rear direction; Each of the engagement structures has a hook portion having an elastically deformable plate portion and a claw portion supported by the plate portion, and a hooked portion on which the claw portion is hooked, the plate portion has a first size in the up-down direction and a second size in a direction perpendicular to the up-down direction, The first size is larger than the second size. Noise removal device.
7. The noise removal device according to any one of claims 1 to 6, The height of the right convex portion is smaller than the depth of the right concave portion, The height of the left convex portion is smaller than the depth of the left concave portion. Noise removal device.
Citation Information
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