soundproofing cover

Abstract

The present invention is to suppress noise caused by a gap (C) between adjacent multiple switch members (91). A soundproof cover (1) is for an electrical junction box (9) having a base (90), multiple switch members (91) mounted on the base (90) and arranged apart from each other. The arrangement direction of the base (90) and the switch members (91) is a vertical direction with the base (90) side as the lower side and the switch members (91) side as the upper side. The soundproof cover (1) has an upper wall portion (2) covering upper surfaces (910) of the multiple switch members (91), and a sandwiching portion (3) sandwiched between the gaps (C) between the adjacent multiple switch members (91).

Description

Technical Field

[0001] This disclosure relates to soundproof covers for electrical junction boxes. Background Technology

[0002] In the relay section of an electrical circuit, electrical junction boxes, such as junction boxes, relay boxes, etc., are configured for centralized circuit control. These junction boxes contain electrical components such as relays and fuses.

[0003] Patent Document 1 discloses an electrical junction box capable of attenuating the operating sound of relays. Multiple relays housed within the junction box are each encased in a vibration-damping member. A small space is maintained between the relays and the vibration-damping member to ensure acoustic reflection between the two components. Corresponding to the amount of this small space, a gap is provided between adjacent relays.

[0004] Existing technical documents Patent documents Patent document 1: Japanese Patent Application Publication No. 2017-200282. Summary of the Invention

[0005] The problem that the invention aims to solve As described above, in the case of the electrical junction box in Patent Document 1, a gap is actively and unavoidably ensured between two adjacent relays. However, through in-depth research, the inventors have come to the insight that noise can be amplified due to this gap. That is, there exists a situation where resonance occurs due to the vibration of the gas within the gap, generating noise caused by the gap. In this case, the noise is amplified. Therefore, the purpose of the soundproof enclosure of this disclosure is to suppress noise caused by the gap between multiple adjacent switching components.

[0006] means for solving problems (1) In order to solve the above problems, the soundproof cover disclosed herein is a soundproof cover for an electrical junction box, the electrical junction box having a base and a plurality of switch components mounted on the base and arranged separately from each other, characterized in that the arrangement direction of the base and the switch components is an up-down direction with the base side as the lower side and the switch component side as the upper side, the soundproof cover having: an upper wall portion that covers the upper surface of the plurality of switch components; and a clamping portion that clamps the gap between adjacent plurality of switch components.

[0007] In this configuration, the "vertical direction" is defined based on the orientation of the base and the switching components. The vertical direction is not limited to the direction of gravity. The vertical direction may coincide with the direction of gravity, or it may differ from it.

[0008] The upper wall of this soundproof enclosure covers the upper surfaces of multiple switching components. Therefore, noise from the upper surfaces of the multiple switching components can be comprehensively suppressed. Furthermore, in the gaps between adjacent switching components, the gas (e.g., air) within the gaps vibrates, thereby generating resonance. In this regard, the clamping portion of the soundproof enclosure is disposed in these gaps. That is, the clamping portion occupies at least a portion of the gap. Therefore, the generation of resonance in these gaps can be suppressed. Thus, noise originating from these gaps can be suppressed.

[0009] (1-1) In the configuration described in (1) above, it is preferable to have a single clamping part arranged in the gap. According to this configuration, the number of clamping parts arranged in the gap can be minimized.

[0010] (1-2) In the configuration described in (1) above, it is preferable to arrange multiple clamping portions in the gap. According to this configuration, the degree of freedom in the arrangement (number of clamping portions, arrangement position, etc.) of the clamping portions in the gap can be increased.

[0011] (1-3) In any of the configurations in (1) to (1-2) above, it is preferable that the upper wall portion has a heat dissipation portion with an uneven shape on its upper surface. According to this configuration, the heat dissipation performance of the upper wall portion of the soundproof cover can be improved. In addition, the rigidity of the upper wall portion can be improved.

[0012] (1-4) In any of the configurations described in (1) to (1-3) above, it is preferable that at least one of the upper wall portion and the clamping portion has an adhesive relationship with respect to the switching member. According to this configuration, the upper wall portion, or the clamping portion, or both the upper wall portion and the clamping portion of the soundproof cover have an adhesive relationship with respect to the switching member. Therefore, it is possible to suppress the soundproof cover from separating from the switching member.

[0013] (2) In any of the configurations in (1) to (1-4) above, it is preferable that the clamping portion abuts against the adjacent plurality of switching members via the gap. According to this configuration, the thermal conductivity between the clamping portion and the switching members can be improved.

[0014] (3) In any of the configurations in (1) to (2) above, it is preferable that the clamping part is integral with the upper wall part and is disposed in the gap in a pre-compressed state, and is pressed against the adjacent plurality of switch members through the gap. According to this configuration, the clamping part is pressed into the gap. Therefore, it is possible to prevent the clamping part (in other words, the soundproof cover) from separating from the gap (in other words, the electrical junction box).

[0015] (4) In any of the configurations in (1) to (3) above, it is preferable that the upper wall portion abuts against the upper surface. According to this configuration, the thermal conductivity between the upper wall portion and the switching member can be improved.

[0016] (5) In any of the configurations in (1) to (4) above, the following configuration is preferred: the direction in which adjacent plurality of the switch members are arranged is the side-by-side arrangement direction, and the direction that is substantially orthogonal to the vertical direction and the side-by-side arrangement direction is the first intersecting direction. The clamping part is made of a thermally conductive material, the thermally conductive material having a base material and a filler that fits to the base material and has a higher thermal conductivity than the base material. The filler is oriented along at least one of the vertical direction and the first intersecting direction. In this configuration, "substantially orthogonal" means that the first intersecting direction and the vertical direction intersect at an angle of 90° (in other words, orthogonal) ± 5°. Furthermore, it means that the first intersecting direction and the side-by-side arrangement direction intersect at an angle of 90° ± 5°. According to this configuration, heat can be moved in the clamping part along the orientation direction of the filler (vertical direction, or the first intersecting direction, or both the vertical direction and the first intersecting direction). That is, heat dissipation function can be ensured.

[0017] (5-1) In the configuration described in (5) above, it is preferable that the base material is made of foamed resin and the filler is a magnetic filler. According to this configuration, the noise suppression function can be ensured by the porosity of the base material. In addition, when manufacturing the soundproof cover, by foaming the clamping part in a magnetic field, the magnetic filler can be oriented along the direction of the magnetic lines of force, in other words, in a predetermined direction (at least one of the vertical direction and the first intersecting direction). Therefore, the heat dissipation function can be ensured along the orientation direction.

[0018] (6) In any of the configurations (1) to (5-1) above, the following configuration is preferred, wherein the upper wall portion is made of a thermally conductive material with the direction of intersection relative to the vertical direction as the second intersection direction, the thermally conductive material having a base material and a filler that fits to the base material and has a higher thermal conductivity than the base material, the filler being oriented along at least one of the vertical direction and the second intersection direction. According to this configuration, heat can be moved in the upper wall portion along the orientation direction of the filler (vertical direction, or the second intersection direction, or both the vertical direction and the second intersection direction). That is, heat dissipation function can be ensured.

[0019] (6-1) In the configuration described in (6) above, it is preferable that the base material is made of foamed resin and the filler is a magnetic filler. According to this configuration, the noise suppression function can be ensured by the porosity of the base material. In addition, by foaming the upper wall portion in a magnetic field during the manufacture of the soundproof cover, the magnetic filler can be oriented along the direction of the magnetic field lines, in other words, in a predetermined direction (at least one of the vertical direction and the second intersecting direction). Therefore, heat dissipation function can be ensured along the orientation direction.

[0020] (7) In any of the configurations (1) to (6-1) above, it is preferable to have a configuration in which the side surface of the switch member facing the gap is the inward surface and the surface other than the inward surface is the outward surface, and a sidewall portion covering the outward surface of the plurality of switch members is further provided. According to this configuration, noise from the outward surface of the switch member can be suppressed.

[0021] (7-1) In the configuration described in (7) above, it is preferable that the sidewall portion abuts against the outward surface. According to this configuration, the thermal conductivity between the sidewall portion and the switching member can be improved.

[0022] (8) In the configuration of (7) or (7-1) above, the following configuration is preferred, wherein the sidewall portion is made of a thermally conductive material with the direction of intersection relative to the vertical direction as the second intersection direction, the thermally conductive material having a base material and a filler that fits to the base material and has a higher thermal conductivity than the base material, the filler being oriented along at least one of the vertical direction and the second intersection direction. According to this configuration, heat can be moved in the sidewall portion along the orientation direction of the filler (vertical direction, or the second intersection direction, or both the vertical direction and the second intersection direction). That is, heat dissipation function can be ensured.

[0023] (8-1) In the configuration described in (8) above, it is preferable that the base material is made of foamed resin and the filler is a magnetic filler. According to this configuration, the noise suppression function can be ensured by the porosity of the base material. In addition, when manufacturing the soundproof cover, by foaming the sidewall portion in a magnetic field, the magnetic filler can be oriented along the direction of the magnetic field lines, in other words, in a predetermined direction (at least one of the vertical direction and the second intersecting direction). Therefore, heat dissipation function can be ensured along the orientation direction.

[0024] (9) In order to solve the above problems, the soundproof cover disclosed herein is a soundproof cover for an electrical junction box, the electrical junction box having a base and a plurality of switch members mounted on the base and arranged separately from each other, characterized in that the arrangement direction of the base and the switch members is a vertical direction with the base side as the lower side and the switch member side as the upper side, the soundproof cover having: an upper wall portion that covers the upper surface of a single switch member; and a clamping portion that clamps the gap between adjacent plurality of switch members, wherein the clamping portions of the plurality of soundproof covers are arranged in the gap, and the plurality of switch members adjacent to each other are connected via the plurality of clamping portions.

[0025] In this configuration, the "vertical direction" is defined based on the orientation of the base and the switching components. The vertical direction is not limited to the direction of gravity. The vertical direction may coincide with the direction of gravity, or it may differ from it.

[0026] The upper wall of this soundproof enclosure covers the upper surface of a single switching member. Therefore, noise from the upper surfaces of multiple switching members can be suppressed individually. Furthermore, in the gaps between adjacent switching members, the gas (e.g., air) within the gaps vibrates, generating resonance. In this regard, the clamping portion of the soundproof enclosure is disposed in these gaps. That is, the clamping portion occupies at least a portion of the gap. Therefore, the generation of resonance in these gaps can be suppressed. Thus, noise originating from these gaps can be suppressed.

[0027] Multiple switching components adjacent to each other via gaps are connected by multiple clamping parts. In other words, the multiple clamping parts abut against the multiple switching components adjacent to each other via gaps. Therefore, the thermal conductivity between the clamping parts and the switching components can be improved.

[0028] (9-1) In the configuration described in (9) above, it is preferable that the upper wall portion has a heat dissipation portion with an uneven shape on its upper surface. According to this configuration, the heat dissipation performance of the upper wall portion of the soundproof cover can be improved. In addition, the rigidity of the upper wall portion can be improved.

[0029] (9-2) In the configuration described in (9) or (9-1) above, it is preferable that at least one of the upper wall portion and the clamping portion has an adhesive relationship with respect to the switching member. According to this configuration, the upper wall portion, or the clamping portion, or both the upper wall portion and the clamping portion of the soundproof cover have an adhesive relationship with respect to the switching member. Therefore, it is possible to suppress the soundproof cover from separating from the switching member.

[0030] (10) In any of the configurations (9) to (9-2) above, it is preferable that the clamping portion is integral with the upper wall portion, and that a plurality of the clamping portions are disposed in the gap in a pre-compressed state, and are pressed against adjacent plurality of the switching members via the plurality of clamping portions. According to this configuration, the plurality of clamping portions are pressed into the gap. Therefore, it is possible to prevent the plurality of clamping portions (in other words, the plurality of soundproof covers) from separating from the gap (in other words, the electrical junction box).

[0031] (11) In any of the configurations in (9) to (10) above, the following configuration is preferred: the direction in which adjacent plurality of the switch members are arranged is the side-by-side arrangement direction, and the direction which is substantially orthogonal to the vertical direction and the side-by-side arrangement direction is the first intersecting direction; the clamping part is made of a thermally conductive material, the thermally conductive material having a base material and a filler that fits to the base material and has a higher thermal conductivity than the base material; the filler is oriented along at least one of the vertical direction and the first intersecting direction. In this configuration, "substantially orthogonal" means that the first intersecting direction and the vertical direction intersect at an angle within 90° (in other words, orthogonal) ± 5°. Furthermore, the first intersecting direction and the side-by-side arrangement direction intersect at an angle within 90° ± 5°. According to this configuration, heat can be moved in the clamping part along the orientation direction of the filler (vertical direction, or the first intersecting direction, or both the vertical direction and the first intersecting direction). That is, heat dissipation function can be ensured.

[0032] (11-1) In the configuration described in (11) above, it is preferable that the base material is made of foamed resin and the filler is a magnetic filler. According to this configuration, the noise suppression function can be ensured by the porosity of the base material. In addition, when manufacturing the soundproof cover, by foaming the clamping part in a magnetic field, the magnetic filler can be oriented along the direction of the magnetic field lines, in other words, in a predetermined direction (at least one of the vertical direction and the first intersecting direction). Therefore, heat dissipation function can be ensured along the orientation direction.

[0033] (12) In any of the configurations (9) to (11-1) above, the following configuration is preferred, wherein the upper wall portion is made of a thermally conductive material with the direction of intersection relative to the vertical direction as the second intersection direction, the thermally conductive material having a base material and a filler that fits to the base material and has a higher thermal conductivity than the base material, the filler being oriented along at least one of the vertical direction and the second intersection direction. According to this configuration, heat can be moved in the upper wall portion along the orientation direction of the filler (vertical direction, or the second intersection direction, or both the vertical direction and the second intersection direction). That is, heat dissipation function can be ensured.

[0034] (12-1) In the above configuration (12), it is preferable that the base material is made of foamed resin and the filler is a magnetic filler. According to this configuration, the noise suppression function can be ensured by the porosity of the base material. In addition, when manufacturing the soundproof cover, by foaming the upper wall portion in a magnetic field, the magnetic filler can be oriented along the direction of the magnetic field lines, in other words, in a predetermined direction (at least one of the vertical direction and the second intersecting direction). Therefore, heat dissipation function can be ensured along the orientation direction.

[0035] (13) In any of the configurations (9) to (12-1) above, it is preferable to have a sidewall portion that covers the outer surface of the switch member, with the side facing the gap as the inward surface and the side other than the inward surface as the outward surface. According to this configuration, noise generated from the outer surface of the switch member can be suppressed.

[0036] (14) In the configuration described in (13) above, it is preferable that the sidewall portion abuts against the outward surface. According to this configuration, the thermal conductivity between the sidewall portion and the switching member can be improved.

[0037] (15) In the configuration of (13) or (14) above, the following configuration is preferred, wherein the sidewall portion is made of a thermally conductive material with the direction of intersection relative to the vertical direction as the second intersection direction, the thermally conductive material having a base material and a filler that fits to the base material and has a higher thermal conductivity than the base material, the filler being oriented along at least one of the vertical direction and the second intersection direction. According to this configuration, heat can be moved in the sidewall portion along the orientation direction of the filler (vertical direction, or the second intersection direction, or both the vertical direction and the second intersection direction). That is, heat dissipation function can be ensured.

[0038] (15-1) In the above configuration (15), it is preferable that the base material is made of foamed resin and the filler is a magnetic filler. According to this configuration, the noise suppression function can be ensured by the porosity of the base material. In addition, when manufacturing the soundproof cover, by foaming the sidewall portion in a magnetic field, the magnetic filler can be oriented along the direction of the magnetic field lines, in other words, in a predetermined direction (at least one of the vertical direction and the second intersecting direction). Therefore, heat dissipation function can be ensured along the orientation direction.

[0039] (16) In any of the above configurations, it is preferable that the volume of the gap is 100% and the occupancy of the clamping portion relative to the gap is 7% or more. According to this configuration, for cases where the occupancy of the clamping portion is less than 7%, noise caused by the gap can be suppressed more reliably.

[0040] Invention Effects According to the soundproof enclosure disclosed herein, noise caused by gaps between adjacent multiple switching components can be suppressed. Attached Figure Description

[0041] Figure 1 This is a perspective view of a junction box equipped with the soundproof cover of the first embodiment.

[0042] Figure 2 This is an exploded 3D view of the junction box.

[0043] Figure 3 yes Figure 1Sectional view in direction III-III.

[0044] Figure 4 yes Figure 3 Sectional view along the IV-IV direction.

[0045] Figure 5 yes Figure 4 A cross-sectional view in the VV direction.

[0046] Figure 6 This is a top-to-bottom sectional view of the junction box before the soundproof cover is assembled.

[0047] Figure 7 This is a left-right sectional view of the junction box in the second embodiment.

[0048] Figure 8 This is a top-bottom sectional view of the junction box according to the third embodiment.

[0049] Figure 9 This is a top-bottom sectional view of the junction box according to the fourth embodiment.

[0050] Figure 10 This is a left-right sectional view of the junction box according to the fifth embodiment.

[0051] Figure 11 This is a perspective view of the junction box according to the sixth embodiment.

[0052] Figure 12 (A) ~ Figure 12 (E) in the figure is a cross-sectional view of the junction box in the vertical direction of other embodiments (1 to 5).

[0053] Figure 13 This is a left-right cross-sectional view of the junction box in another embodiment (6).

[0054] Figure 14 (A) in the figure is a top-bottom sectional view of the junction box of Comparative Example 1. Figure 14 (B) in the figure is a top-to-bottom sectional view of the junction box of Comparative Example 2.

[0055] Figure 15 It is a graph representing the test results of the noise suppression test. Detailed Implementation

[0056] The following describes an embodiment of the soundproof cover of this disclosure.

[0057] <First Implementation> Figure 1 A perspective view of a junction box equipped with the soundproof cover of this embodiment. Figure 2 This is an exploded perspective view of the junction box. Figure 3 express Figure 1 Sectional view in direction III-III. Figure 4 express Figure 3 Sectional view along the IV-IV direction. Figure 5 express Figure 4 A cross-sectional view in the VV direction. Figure 6 This shows a top-to-bottom sectional view (viewed from the front) of the junction box before the soundproof enclosure is assembled. Furthermore, in Figures 3-6 The diagrams schematically represent the orientation of filler F. Specifically, the straight lines "-" and dots "-" in these diagrams represent the orientation of filler F. "" indicates the state in which multiple packing materials F are interconnected.

[0058] In this embodiment, the up-down direction (direction of gravity) corresponds to the "up-down direction" of this disclosure. The up-down direction also corresponds to the arrangement direction (stacked direction) of the base 90 and the relay 91. Furthermore, the base 90 side is the lower side, and the relay 91 side is the upper side. The left-right direction corresponds to the "side-by-side arrangement direction" of this disclosure. The left-right direction intersects the up-down direction. The front-back direction corresponds to the "first intersecting direction" of this disclosure. The front-back direction is orthogonal to both the left-back and up-down directions. The horizontal direction (either the front-back direction, the left-right direction, or a direction intersecting both the front-back and left-back directions) corresponds to the "second intersecting direction" of this disclosure. The second intersecting direction intersects the up-down direction.

[0059] (Composition of junction box 9) First, the configuration of the junction box 9 equipped with the soundproof enclosure 1 of this embodiment will be described. The junction box 9 is included in the concept of an "electrical junction box" of this disclosure. The junction box 9 is mounted in a vehicle. The junction box 9 controls the charging system, battery pack, etc. Figure 1 , Figure 2 As shown, the junction box 9 includes a base 90, a plurality of (two in this embodiment) relays 91, and a soundproof enclosure 1. The relays 91 are included in the concept of "switching components" of this disclosure.

[0060] (Substrate 90, Relay 91) like Figure 1 , Figure 2 As shown, the base 90 is plate-shaped. The base 90 is fixed to the vehicle body (the fixed component, not shown). Multiple relays 91 and multiple connectors (not shown) are mounted on the upper surface of the base 90. The multiple relays 91 are arranged separately from each other in the left-right direction. A gap C is maintained between the multiple relays 91. Each relay 91 includes a relay body 91a and a frame 91b. The frame 91b is a quadrilateral frame and is erected from the upper surface of the base 90. The relay body 91a is fixed within the frame 91b. The relay body 91a can control a predetermined circuit to be open (connected) or closed (disconnected).

[0061] like Figures 2-6 As shown, the relay 91 has an upper surface 910 and a side surface 911. The upper surface 910 faces upward. The side surface 911 faces horizontally. The side surface 911 has an inward surface 911a and an outward surface 911b. The inward surface 911a faces the gap C between the plurality of relays 91 (described later). The outward surface 911b is the surface other than the inward surface 911a. The outward surface 911b faces the outside of the relay group (the plurality of relays 91).

[0062] (Soundproof cover 1) like Figure 2 , Figure 4 As shown, the soundproof enclosure 1 is made of thermally conductive material and has a bottomed box shape with an opening facing downwards (towards the substrate 90). Figures 3-6 Schematic representation: The thermally conductive material forming the soundproof enclosure 1 comprises a base material M and multiple fillers (heat dissipation fillers) F. The base material M is a foamed resin (e.g., polyurethane foam). The fillers F are magnetic fillers (e.g., composite particles incorporating stainless steel particles into graphite particles). The multiple fillers F are dispersed and compounded into the base material M. The thermal conductivity of the fillers F is higher than that of the base material M. The thermally conductive material has both noise suppression and heat dissipation functions.

[0063] like Figures 2-6 As shown, the soundproof enclosure 1 includes an upper wall portion 2, a clamping portion 3, and a side wall portion 4. The upper wall portion 2 covers the upper surface 910 of a plurality of relays 91 from above. The upper wall portion 2 abuts against the upper surface 910. Figures 3-6 This schematically illustrates that in the upper wall portion 2, multiple packing materials F are connected and oriented in a vertical direction. A clamping portion 3 is disposed in the gap C. The clamping portion 3 is integral with the upper wall portion 2. Figure 6 As shown, the clamping part 3 is disposed in the gap C in a pre-compressed state. That is, the thickness W in the left-right direction of the clamping part 3 before being pressed into the gap C (natural state, uncompressed state) is greater than the gap C (more specifically, the left-right length C1 of the gap C). The clamping part 3 is pressed into the gap C from the top. Therefore, the clamping part 3 is pressed to the adjacent plurality of relays 91 via the gap C by the elastic restoring force caused by the compression amount (=W-C1). In the clamping part 3, a plurality of fillers F are connected and oriented in the vertical direction. The side wall part 4 covers the outer surface 911b of the relay 91 from the horizontal direction. The side wall part 4 abuts against the outer surface 911b. In the side wall part 4, a plurality of fillers F are connected and oriented in the vertical direction.

[0064] (Effects) Next, the effects of the soundproof cover 1 in this embodiment will be explained. Noise (operating sound) is generated from the relays 91. Assuming the total volume of the gap C is a space, since multiple relays 91, i.e., sound sources, are arranged on both sides of the gap C in the left-right direction, the air inside the gap C vibrates and resonates due to the mutual interference of sound waves from the multiple relays 91. That is, noise is generated. In this regard, the clamping part 3 is provided in the gap C. Therefore, the generation of resonance in the gap C can be suppressed. Thus, the noise originating from the gap C can be suppressed.

[0065] The upper wall 2 of the soundproof enclosure 1 covers the upper surfaces 910 of the multiple relays 91. Therefore, noise from the upper surfaces 910 of the multiple relays 91 can be comprehensively suppressed. A single clamping part 3 is disposed in the gap C. Therefore, the number of clamping parts 3 in the gap C can be minimized. The clamping part 3 occupies the total volume of the gap C. That is, with the volume of the gap C being 100%, the occupancy rate of the clamping part 3 relative to the gap C is 100%.

[0066] The thermally conductive material forming the soundproof cover 1 has a stickiness caused by unreacted substances in the base material M. Therefore, the upper wall portion 2, the clamping portion 3, and the side wall portion 4 are sticky relative to the relay 91. Therefore, it is possible to prevent the soundproof cover 1 from separating from the relay 91.

[0067] The clamping part 3 abuts against a plurality of relays 91 adjacent in the left-right direction via gap C. Therefore, the thermal conductivity between the clamping part 3 and the relays 91 can be improved. Furthermore, the clamping part 3 is integral with the upper wall part 2 and is pre-compressed in the gap C, pressing against the plurality of relays 91 adjacent in the left-right direction via gap C. Therefore, it is possible to prevent the clamping part 3 (in other words, the soundproof cover 1) from separating from the gap C (in other words, the junction box 9). Additionally, the clamping part 3 can be... Figure 6 The elastic restoring force of the compression amount (=W-C1) shown is used to suppress the vibration of the relay 91. The upper wall portion 2 abuts against the upper surface 910 of the relay 91. Therefore, the thermal conductivity between the upper wall portion 2 and the relay 91 can be improved. In addition, the upper wall portion 2 abuts against the upper surface 910 over the entire surface (without gaps). At this point, the thermal conductivity between the upper wall portion 2 and the relay 91 can also be improved.

[0068] The thermally conductive material forming the clamping portion 3 includes a base material M and a filler F. The thermal conductivity of the filler F is higher than that of the base material M. Furthermore, the filler F is connected and oriented along the vertical direction. Therefore, heat can move vertically within the clamping portion 3. That is, heat can be dissipated from the clamping portion 3 to the outside via the upper wall portion 2.

[0069] The thermally conductive material forming the upper wall portion 2 comprises a base material M and a filler F. The thermal conductivity of the filler F is higher than that of the base material M. Furthermore, the filler F is connected and oriented along the vertical direction. Therefore, heat can move in the upper wall portion 2 along the vertical direction. That is, heat can be dissipated from the upper wall portion 2 to the outside via its upper surface.

[0070] The outer surfaces 911b of multiple relays 91 are surrounded and covered by the sidewall portion 4 from the horizontal outer side (lateral side). Therefore, noise from the outer surfaces 911b of the relays 91 can be suppressed. The sidewall portion 4 abuts against the outer surfaces 911b. Therefore, the thermal conductivity between the sidewall portion 4 and the relays 91 can be improved. In addition, the sidewall portion 4 abuts against the outer surfaces 911b on the entire surface (without gaps). At this point, the thermal conductivity between the sidewall portion 4 and the relays 91 can also be improved.

[0071] The thermally conductive material forming the sidewall portion 4 comprises a base material M and a filler F. The thermal conductivity of the filler F is higher than that of the base material M. Furthermore, the filler F is connected and oriented in the vertical direction. Therefore, heat can move in the vertical direction within the sidewall portion 4. That is, heat can be dissipated from the sidewall portion 4 to the outside via the upper wall portion 2.

[0072] <Second Implementation> The difference between the soundproof enclosure in this embodiment and the soundproof enclosure in the first embodiment is that it covers a single relay. That is, multiple relays are individually covered by the soundproof enclosure. Here, only the difference will be described.

[0073] Figure 7 This is a left-right sectional view of the junction box according to this embodiment. Furthermore, regarding... Figure 3 Corresponding parts are indicated by the same reference numerals. For example... Figure 7 As shown, multiple relays 91 are each covered by a soundproof cover 1. The number of relays 91 and soundproof covers 1 are the same. Multiple clamping parts 3 of soundproof covers 1 are arranged in the gap C. Multiple relays 91 adjacent to each other through the gap C are connected by multiple clamping parts 3.

[0074] The soundproof enclosure of this embodiment and the soundproof enclosure of the first embodiment have the same effect on the common parts. The upper wall 2 covers the upper surface 910 of the single relay 91 (see reference). Figure 2Therefore, noise from the upper surface 910 of the plurality of relays 91 can be suppressed individually for each relay 91. Furthermore, a plurality of clamping portions 3 are disposed in the gap C. Therefore, resonance in the gap C can be suppressed. Therefore, noise originating from the gap C can be suppressed. Additionally, the plurality of relays 91 adjacent in the left-right direction via the gap C are connected via a clamping portion assembly (a plurality of clamping portions 3). In other words, the clamping portion assembly and the plurality of relays 91 adjacent in the left-right direction via the gap C abut against each other. Therefore, thermal conductivity between the clamping portions 3 and the relays 91 can be improved.

[0075] <Third Implementation Method> The difference between the soundproof cover of this embodiment and the soundproof cover of the first embodiment is that the clamping part is only disposed in a portion of the gap. Here, only the differences will be described. Figure 8 This is a top-bottom sectional view of the junction box according to this embodiment. Furthermore, regarding... Figure 4 Corresponding parts are indicated by the same reference numerals. For example... Figure 8 As shown, the clamping part 3 is disposed in the central portion of the gap C in the left-right direction. Specifically, the clamping part 3 is disposed in the range from 25% to 75% of the gap C, with the left end C1 of the gap C being 100%, the right end C12 being 100%, and the length C1 in the left-right direction being 100%. In addition, with the volume of the gap C being 100%, the clamping part 3 occupies 50% of the gap C.

[0076] The soundproof enclosure of this embodiment and the soundproof enclosure of the first embodiment have the same effect on the common parts. The volume of the gap C is 100%, and the occupancy of the clamping part 3 relative to the gap C is 50%. As in this embodiment, the clamping part 3 may also be disposed only on a portion of the gap C.

[0077] <Fourth Implementation> The difference between the soundproof cover of this embodiment and the soundproof cover of the first embodiment is that the clamping part is only disposed in a portion of the gap. Here, only the differences will be described. Figure 9 This is a top-bottom sectional view of the junction box according to this embodiment. Furthermore, regarding... Figure 4 Corresponding parts are indicated by the same reference numerals. For example... Figure 9 As shown, the clamping part 3 is disposed on the upper part of the gap C. Specifically, the clamping part 3 is disposed in the range from 0% to 50% with the vertical length C2 of the gap C being 100%, the upper end C21 of the gap C being 0%, and the lower end C22 being 100%. In addition, with the volume of the gap C being 100%, the clamping part 3 occupies 50% of the gap C.

[0078] The soundproof enclosure of this embodiment and the soundproof enclosure of the first embodiment have the same effect on the common parts. Taking the volume of gap C as 100%, the clamping part 3 occupies 50% of gap C. As in this embodiment, the clamping part 3 may also be disposed only in a part of gap C.

[0079] In gap C, the heat from the multiple relays 91 tends to rise with the movement of air. Therefore, heat tends to remain in the upper part of gap C. In this regard, the clamping part 3 is positioned between the 0% and 50% positions. Therefore, the heat in the upper part of gap C can be rapidly dissipated to the outside via the clamping part 3 and the upper wall part 2.

[0080] <Fifth Implementation> The difference between the soundproof cover of this embodiment and the soundproof cover of the first embodiment is that the clamping part is only disposed in a portion of the gap. Here, only the differences will be described. Figure 10 This is a cross-sectional view (viewed from above) of the junction box in this embodiment, showing its left and right sides. Furthermore, regarding... Figure 3 Corresponding parts are indicated by the same reference numerals. For example... Figure 10 As shown, the clamping part 3 is disposed on the front and rear portions of the gap C. Specifically, the clamping part 3 is disposed in the interval from 0% to 25% and from 75% to 100% of the gap C, with the front end C3 of the gap C being 100%, the rear end C32 of the gap C being 0% of the front end C31 of the gap C being 100% of the front end C31 of the gap C being 100% of the front end C32 of the gap C being 100% of the front end C31 ...

[0081] The soundproof enclosure of this embodiment and the soundproof enclosure of the first embodiment have the same effect on the common parts. Taking the volume of gap C as 100%, the clamping part 3 occupies 50% of gap C. As in this embodiment, the clamping part 3 may also be disposed only on a portion of gap C. Alternatively, multiple clamping parts 3 may be disposed relative to a single gap. Furthermore, the third embodiment described above (…) Figure 8 ), Fourth Implementation Method ( Figure 9 Fifth implementation method () Figure 10 At least two of the configuration methods of the clamping part 3 shown in the figure are appropriately combined.

[0082] <Sixth Implementation Method> The difference between the soundproof enclosure of this embodiment and the soundproof enclosure of the first embodiment is that the upper wall has a heat dissipation portion on its upper surface. Additionally, it lacks a side wall portion. Here, only the differences will be described. Figure 11 This is a perspective view showing the junction box according to this embodiment. Furthermore, regarding... Figure 1Corresponding parts are indicated by the same reference numerals. For example... Figure 11 As shown, the soundproof enclosure 1 has an upper wall portion 2 and a clamping portion 3. The soundproof enclosure 1 does not have a side wall portion 4 (see reference). Figure 1 Therefore, the outward-facing surface 911b of the side 911 of the relay 91 is exposed to the outside. The upper wall portion 2 has a plurality of heat dissipation portions 20 on its upper surface. The heat dissipation portions 20 are rib-shaped extending in the left-right direction. The plurality of heat dissipation portions 20 are arranged in the front-back direction. Through the plurality of heat dissipation portions 20, the upper surface of the upper wall portion 2 as a whole has a concave-convex shape.

[0083] The soundproof cover of this embodiment and the soundproof cover of the first embodiment have the same effect on the common parts. According to this embodiment, compared with the case where the upper surface of the upper wall portion 2 is planar, the surface area (heat-conducting area) of the upper surface can be expanded. Therefore, heat dissipation can be improved. In addition, the rigidity of the upper wall portion 2 can be improved. In addition, the soundproof cover 1 can be miniaturized to correspond to the amount of side wall portion 4 not provided.

[0084] <Other> The embodiments of the soundproof enclosure of this disclosure have been described above. However, the embodiments are not particularly limited to the above-described manner. Various modifications and improvements can also be made by those skilled in the art.

[0085] The following will be as follows: Figures 1-6 , Figures 8-11 The type of soundproof enclosure shown, which centrally covers multiple relays 91, is appropriately referred to as an "enclosed type soundproof enclosure". Additionally, as shown... Figure 7 The type of soundproof enclosure shown, which individually covers each of the multiple relays 91, is appropriately referred to as a "single-type soundproof enclosure".

[0086] (Regarding composition) Figure 12 (A) ~ Figure 12 In the diagram, (E) represents a partial sectional view of the junction box in the vertical direction of other embodiments (such as 1 to 5). Furthermore, Figure 12 (A) ~ Figure 12 (D) in the text indicates a soundproof enclosure that includes the specified type. Figure 12 (A) ~ Figure 12 In (D), for the case of... Figure 4 Corresponding parts are indicated by the same reference numerals in the attached figures. Figure 12 (E) in the text indicates a separate type of soundproof enclosure. Figure 12 In (E), for the case of... Figure 7 Corresponding parts are indicated by the same reference numerals in the attached figures.

[0087] like Figure 12As shown in (A), in the upper wall portion 2, the clamping portion 3, and the side wall portion 4, a plurality of packing materials F are connected and oriented in the left-right direction. Thus, it is also possible that in at least one of the upper wall portion 2, the clamping portion 3, and the side wall portion 4, a plurality of packing materials F are connected and oriented in the left-right direction.

[0088] like Figure 12 As shown in (B), in the upper wall portion 2, the clamping portion 3, and the side wall portion 4, a plurality of packing materials F are connected and oriented in the front-to-back direction. Thus, it is also possible that in at least one of the upper wall portion 2, the clamping portion 3, and the side wall portion 4, a plurality of packing materials F are connected and oriented in the front-to-back direction.

[0089] like Figure 12 As shown in (C), in the upper wall portion 2 and the side wall portion 4, multiple packing materials F are radially connected and oriented with respect to the relay 91. In the clamping portion 3, multiple packing materials F are oriented vertically. Thus, in at least one of the upper wall portion 2 and the side wall portion 4, multiple packing materials F can also be radially connected and oriented. Furthermore, in at least two of the upper wall portion 2, the clamping portion 3, and the side wall portion 4, the orientation directions of the multiple packing materials F can be different.

[0090] Thus, there is no particular limitation on the orientation direction of the multiple packing materials F in the upper wall portion 2, the clamping portion 3, and the side wall portion 4. In the clamping portion 3, the multiple packing materials F may be oriented along the vertical direction, or the front-back direction (first intersecting direction), or a direction intersecting the vertical and front-back directions. In the upper wall portion 2 and the side wall portion 4, the multiple packing materials F may be oriented along the vertical direction, or the horizontal direction (second intersecting direction), or a direction intersecting the vertical and horizontal directions.

[0091] Furthermore, the orientation directions of multiple filler F in at least two of the upper wall portion 2, clamping portion 3, and side wall portion 4 may be the same or different. Additionally, the orientation directions of multiple filler F within a single wall portion (upper wall portion 2, clamping portion 3, or side wall portion 4) may be the same or different.

[0092] Preferably, in the clamping portion 3, at least one end of the orientation direction of the plurality of filler F is connected to at least one of the upper wall portion 2 and the side wall portion 4. In this way, heat can be dissipated from the clamping portion 3 to the outside of the soundproof cover 1 via the upper wall portion 2, or the side wall portion 4, or both the upper wall portion 2 and the side wall portion 4.

[0093] Preferably, in the upper wall portion 2, at least one end of the orientation direction of the plurality of filler F is open to the outside of the soundproof cover 1. In this way, heat can be dissipated from the upper wall portion 2 to the outside of the soundproof cover 1 via the outer surface of the upper wall portion 2.

[0094] Preferably, in the sidewall portion 4, at least one end of the orientation direction of the plurality of filler F is open to the outside of the soundproof cover 1. In this way, heat can be dissipated from the sidewall portion 4 to the outside of the soundproof cover 1 through the outer surface of the sidewall portion 4.

[0095] like Figure 12 As shown in (D), the soundproof enclosure 1 is a composite assembly (aggregate) of multiple components (upper wall portion 2, clamping portion 3, and side wall portion 4). Thus, the soundproof enclosure 1 can be a composite assembly ( Figure 12 (D) in the middle can also be a single entity ( Figure 12 (A) ~ Figure 12 (C) in the middle.

[0096] The above uses Figure 12 (A) ~ Figure 12 The implementation of the soundproof enclosure 1 including type 1 described in (D) can be applied not only to the soundproof enclosure 1 including type 1, but also to the soundproof enclosure 1 of a single type (see reference). Figure 7 ).

[0097] like Figure 12 As shown in (E), in the single-type soundproof enclosure 1 on the left, multiple filler materials F are connected and oriented in the left-right direction. On the other hand, in the single-type soundproof enclosure 1 on the right, multiple filler materials F are connected and oriented in the up-down direction. That is, the orientation directions of the multiple filler materials F are different between the multiple soundproof enclosures 1. Thus, the orientation directions of the multiple filler materials F between the multiple soundproof enclosures 1 can be the same or different.

[0098] Figure 13 A left-right sectional view of the junction box in another embodiment (6). Furthermore, for... Figure 3 Corresponding parts are indicated by the same reference numerals. For example... Figure 13 As shown, multiple (three in this embodiment) relays 91A to 91C have different shapes and sizes. Relays 91A to 91C are included in the concept of a "switching component" of this disclosure. Relays 91A and 91B are arranged in a left-right direction. Relays 91B and 91C are arranged in a front-back direction (specifically, right rear-left front direction). Relays 91C and 91A are arranged in a front-back direction (specifically, right front-left rear direction). The clamping part 3 is disposed in the gap Cα between relays 91A and 91B, the gap Cβ between relays 91B and 91C, and the gap Cγ between relays 91C and 91A.

[0099] Therefore, there are no particular limitations on the shape, size, position, number, or side-by-side arrangement direction of the multiple relays 91A-91C. The shapes and sizes of the multiple relays 91A-91C can be identical or different. Furthermore, the side-by-side arrangement direction of the multiple relays 91A-91C can be, for example, left-right, front-back, or a direction intersecting the left-right and front-back directions. There are no particular limitations on the shape, size, position, or number of clamping parts 3. Additionally, at least one clamping part 3 can be arranged in one of the gaps Cα-Cγ.

[0100] The first intersecting direction can also be a direction that intersects the aforementioned side-by-side direction at an angle of within 90° ± 5° (in other words, between 85° and 95°). The first intersecting direction can also be a direction that intersects the vertical direction at an angle of within 90° ± 5°.

[0101] The second intersecting direction can be any direction that intersects the vertical direction. In other words, it can be any direction other than the vertical direction. The second intersecting direction can be orthogonal to the vertical direction or not orthogonal to it. For example, the second intersecting direction can be left-right, front-back, or a combination of both.

[0102] The vertical direction corresponds to the configuration direction (stack direction) of the base 90 and relays 91, 91A~91C. The vertical direction is not limited to the direction of gravity. The vertical direction and the direction of gravity can be the same or different. For example, the vertical direction can be the direction of gravity, a horizontal direction orthogonal to the direction of gravity, a direction relative to the direction of gravity, or a direction intersecting with the horizontal direction, etc.

[0103] There are no particular limitations on the structure or number of components of the relay 91. The relay 91 may also be without the frame 91b. The relay 91 can be fixed to a predetermined position on the base 90 by positioning components (e.g., frame 91b, bolts, screws, locking claws, etc.). The relay 91 may also consist only of the relay body 91a.

[0104] exist Figure 11 In this configuration, ribbed heat dissipation portions 20 are provided on the upper surface of the upper wall portion 2. There are no particular limitations on the extending direction or the number of heat dissipation portions 20. The heat dissipation portions 20 may extend along the front-to-back direction. The heat dissipation portions 20 may also extend in a direction intersecting the left-to-right and front-to-back directions. The heat dissipation portions 20 may not be ribbed. For example, embossed, grooved, or recessed heat dissipation portions 20 may be provided on the upper surface of the upper wall portion 2. The upper surface simply needs to have an uneven shape. Figure 2 The heat dissipation portion 20 described above is disposed on at least one of the outer surface of the upper wall portion 2 and the outer surface of the side wall portion 4 of the soundproof cover 1 shown.

[0105] The switching component is not limited to relay 91. Any component capable of switching AC power is acceptable. The electrical junction box is not limited to junction box 9. For example, it can also be an electronic control system component that includes switching components such as junction boxes, relay boxes, converters, inverters, and ECUs (Electronic Control Units).

[0106] Alternatively, a soundproof enclosure 1 can be sandwiched between the substrate 90 and the relay 91. This suppresses noise from the relay 91 (specifically, noise in the frequency band above 630kHz and below 2000kHz). In particular, when MIF (a registered trademark of Sumitomo Riko Co., Ltd.) material is used as the material for the soundproof enclosure 1, a greater noise suppression effect is achieved in the frequency band below 2000Hz. It is presumed that this noise suppression effect is due to the vibration damping effect of the soundproof enclosure 1 made of MIF material, which reduces solid-borne noise generated from the junction box 9.

[0107] (Regarding the materials) There are no particular limitations on the material of the thermally conductive material forming at least one of the upper wall portion 2, the clamping portion 3, and the side wall portion 4. The thermally conductive material may or may not contain filler F. For example, a polymer can be used as the base material M. The type of polymer can be appropriately determined considering noise suppression and heat dissipation functions. The polymer can be solid or porous. Examples of solid polymers include urethane rubber, silicone rubber, fluororubber, acrylic rubber, acrylonitrile-butadiene rubber, and other crosslinked rubbers, as well as styrene-based, olefin-based, vinyl chloride-based, polyester-based, polyurethane-based, and polyamide-based thermoplastic elastomers. Examples of porous polymers include polyurethane foam, polyethylene foam, and polypropylene foam. From the viewpoint of ensuring high noise suppression performance, foamed resins are preferred.

[0108] The filler F only needs to be oriented. For example, multiple fillers F can be connected along a predetermined direction to achieve orientation. Alternatively, the filler F itself can also be anisotropic in shape. Examples of magnetic fillers forming the filler F include strongly magnetic materials such as iron, nickel, cobalt, gadolinium wire, and stainless steel; anti-strongly magnetic materials such as MnO, Cr2O3, FeCl2, and MnAs; and alloys using these materials. Among these, stainless steel and copper-iron alloys are preferred due to their high thermal conductivity and excellent processability as magnetic fillers. Furthermore, from the viewpoint of improving heat dissipation, composite particles in which magnetic particles are attached to the surface of thermally conductive particles with high thermal conductivity can also be used as magnetic fillers. For example, carbon materials such as graphite, expanded graphite, and carbon fiber are preferred as materials for the thermally conductive particles.

[0109] There are no particular limitations on the method of imparting viscosity to the heat-conducting material. For example, an adhesive can be added to the heat-conducting material. Alternatively, viscosity can be imparted by unreacted substances in the base material M. Furthermore, viscosity can also be imparted by increasing the surface roughness of the desired wall portions in the upper wall portion 2, the clamping portion 3, and the side wall portion 4. The heat-conducting materials forming at least two of the upper wall portion 2, the clamping portion 3, and the side wall portion 4 can be the same or different.

[0110] There are no particular limitations on the manufacturing method of the soundproof cover 1. As an example, the manufacturing method of the soundproof cover 1 includes a raw material preparation step and a foaming molding step. In the raw material preparation step, a raw material is prepared by mixing foaming urethane resin raw material, filler (magnetic filler), foaming agent, catalyst, etc. In the foaming molding step, the raw material is injected into the mold cavity of the molding die, and foamed into a predetermined shape while being acted upon by a magnetic field. That is, the filler is oriented in a predetermined direction (the direction of the magnetic field lines). In this way, the soundproof cover 1 can also be manufactured.

[0111] Example Next, noise suppression tests (Test 1 and Test 2) conducted on the soundproof enclosure of this disclosure will be described.

[0112] [Experiment 1] <Sample> First, the composition of the samples used in Experiment 1 (Example 1, Comparative Example 1, and Comparative Example 2) will be described. (The text then repeats itself, so the translation will only include the first instance.) Figure 14 (A) shows a top-to-bottom sectional view of the junction box of Comparative Example 1. Figure 14 (B) shows a top-to-bottom sectional view of the junction box in Comparative Example 2. Furthermore, regarding... Figure 4 Corresponding parts are indicated by the same reference numerals in the attached figures.

[0113] Example 1 is equipped with Figures 1-6 The junction box 9 of the soundproof enclosure 1 shown in the first embodiment. Comparative Example 1 is... Figure 14 The junction box 9A shown in (A) is Comparative Example 1. Comparative Example 1 does not have a soundproof enclosure. Comparative Example 2 is... Figure 14 The junction box 9B shown in (B) is compared with the junction box 9B shown in Comparative Example 2. The junction box 1B is equipped with a soundproof enclosure 1B. However, the soundproof enclosure 1B does not have a clamping part. Figure 4 (As shown in clamping part 3). Therefore, the total volume of gap C is occupied by air.

[0114] <Experimental Methods> Next, the test method will be explained. In the test, noise at predetermined frequencies (5kHz, 10kHz, 15kHz) was generated in the relays 91 of each sample. Furthermore, the noise was generated by supplying current to the relays 91 from a bipolar power supply (switching power supply) at a predetermined drive frequency, effectively causing the relays 91 to operate. Additionally, frequency switching was achieved by switching the drive frequency of the bipolar power supply.

[0115] For each sample and for each frequency, the acoustic power level at a predetermined measurement location was collected using a microphone. Furthermore, the predetermined measurement location refers to a position 40 cm above the sample (specifically, the centroid of the rectangular gap C when viewing the sample from above).

[0116] <Experimental Results> Next, the experimental results will be explained. Figure 15 In the diagram, the test results of the noise suppression test are represented by a graph. For the correspondence between symbols and frequencies, a quadrilateral (□) represents data at a frequency of 5kHz, a circle (○) represents data at a frequency of 10kHz, and a cross (×) represents data at a frequency of 15kHz.

[0117] for Figure 15 Observations show that a lower sound power level on the vertical axis indicates a quieter environment near the microphone, and better suppression of noise from relay 91. For example... Figure 15 As shown, among all frequencies, Example 1 has the lowest sound power level, followed by Comparative Example 2, which has a low sound power level, and Comparative Example 1 has the highest sound power level. Therefore, it can be seen that Example 1 has the highest noise suppression performance, followed by Comparative Example 2, which has a high noise suppression performance, and Comparative Example 1, which has the lowest noise suppression performance. Thus, compared to Comparative Example 1 and Comparative Example 2, Example 1 can achieve high noise suppression performance in the frequency band of 5kHz to 15kHz.

[0118] [Experiment 2] <Sample> In Experiment 2, Examples 1, Comparative Example 2, and the newly added Examples 2-5 from Experiment 1 were used. Examples 2-5 are equipped with... Figure 9 The junction box 9 of the soundproof enclosure 1 shown in the fourth embodiment. Figure 9 In the case of the soundproof enclosure 1 shown, with the volume of gap C being 100%, the occupancy rate (hereinafter, appropriately referred to as "occupancy rate") of the clamping part 3 relative to gap C is 50%. In contrast, in Embodiment 1 ( Figures 1-6 The share of Example 1 was 100%, the share of Example 2 was 65%, the share of Example 3 was 44%, the share of Example 4 was 22%, the share of Example 5 was 7%, and the share of Comparative Example 2 ( Figure 14The percentage of (B) in the middle is 0%.

[0119] <Experimental Methods> In the test, the relays 91 of each sample were made to generate noise at a predetermined frequency (10kHz). Other conditions were the same as in Test 1 described above.

[0120] <Experimental Results> Table 1 shows the test results of the noise suppression test.

[0121] [Table 1]

[0122] For the "sound power reduction effect" in the table, the value is 1 for Example 1 (occupancy = 100%) and 0 for Comparative Example 2 (occupancy = 0%). The values ​​for Examples 2 to 5 are relative to these values.

[0123] The reduction effect of sound power is calculated according to the following formula. Furthermore, in the formula, "sound power level of each sample" refers to the sound power level of any one of Examples 2-5. The unit of sound power level is "dBA".

[0124] Sound power reduction effect = {(sound power level of Comparative Example 2) - (sound power level of each sample)} / {(sound power level of Comparative Example 2) - (sound power level of Example 1)} As shown in Table 1, the sound power reduction effect, in descending order, is as follows: Example 1 (occupancy = 100%), Example 2 (occupancy = 65%), Example 3 (occupancy = 44%), Example 4 (occupancy = 22%), Example 5 (occupancy = 7%), and Comparative Example 2 (occupancy = 0%). Therefore, it can be seen that the higher the occupancy of the clamping part 3 relative to the gap C, the higher the sound power reduction effect. Furthermore, it can be seen that as long as the occupancy rate is 7% or higher, compared to the case with an occupancy rate of 0%, the sound power reduction effect, in other words, the noise suppression performance, can be reliably achieved.

[0125] Explanation of reference numerals in the attached figures: 1: Soundproof enclosure; 1B: Soundproof enclosure; 2: Upper wall; 20: Heat dissipation section; 3: Clamping section; 4: Side wall; 9: Junction box (electrical junction box); 9A: Junction box; 9B: Junction box; 90: Base; 91: Relay (switching component); 91A~91C: Relay (switching component); 91a: Relay body; 91b: Frame; 910: Upper surface; 911: Side; 911a: Inner surface; 911b: Outer surface; C: Gap; Cα~Cγ: Gap; C1: Length in the left-right direction; C11: Left end; C12: Right end; C2: Length in the up-down direction; C21: Upper end; C22: Lower end; C3: Length in the front-back direction; C31: Front end; C32: Rear end; F: Filler; M: Base material; W: Thickness.

Claims

1. A soundproof enclosure for an electrical junction box, the junction box comprising a base and a plurality of switch components mounted on the base and disposed separately thereof, characterized in that, The substrate and the switching component are arranged in a vertical direction with the substrate side as the bottom and the switching component side as the top. The soundproof enclosure has the following features: The upper wall portion, which covers the upper surfaces of the plurality of said switching components; and A clamping part, which is clamped in the gap between adjacent plurality of said switching components.

2. The soundproof cover according to claim 1, characterized in that, The clamping portion abuts against the adjacent plurality of the switching components via the gap.

3. The soundproof cover according to claim 2, characterized in that, The clamping part is integral with the upper wall part and is disposed in the gap in a pre-compressed state, and is pressed to the adjacent plurality of switch members through the gap.

4. The soundproof cover according to claim 1, characterized in that, The upper wall portion abuts against the upper surface.

5. The soundproof cover according to claim 1, characterized in that, The direction in which adjacent switching components are arranged is defined as the side-by-side arrangement direction, and the direction that is approximately orthogonal to both the vertical direction and the side-by-side arrangement direction is defined as the first intersecting direction. The clamping part is made of thermally conductive material. The thermally conductive material comprises a base material and fillers that are incorporated into the base material and have a higher thermal conductivity than the base material. The filler is oriented in at least one of the vertical direction and the first intersecting direction.

6. The soundproof cover according to claim 1, characterized in that, The direction that intersects the vertical direction is defined as the second intersection direction. The upper wall is made of thermally conductive material. The thermally conductive material comprises a base material and fillers that are incorporated into the base material and have a higher thermal conductivity than the base material. The filler is oriented in at least one of the vertical direction and the second intersecting direction.

7. The soundproof cover according to claim 1, characterized in that, The side of the switch member facing the gap is designated as the inward surface, and the surfaces other than the inward surface are designated as the outward surface. The soundproof enclosure also has a sidewall portion that covers the outer surface of the plurality of the switch components.

8. The soundproof cover according to claim 7, characterized in that, The direction that intersects the vertical direction is taken as the second intersection direction. The sidewall portion is made of thermally conductive material. The thermally conductive material comprises a base material and fillers that are incorporated into the base material and have a higher thermal conductivity than the base material. The filler is oriented in at least one of the vertical direction and the second intersecting direction.

9. A soundproof enclosure for an electrical junction box, the junction box comprising a base and a plurality of switch components mounted on the base and disposed separately thereof, characterized in that, The substrate and the switching component are arranged in a vertical direction with the substrate side as the bottom and the switching component side as the top. The soundproof enclosure has the following features: The upper wall portion, which covers the upper surface of the single switching member; and A clamping part, which is clamped in the gap between adjacent plurality of said switching components. The clamping portion of the plurality of soundproof covers is arranged in the gap. The plurality of switch components that are adjacent to each other via the gap are connected via the plurality of clamping portions.

10. The soundproof cover according to claim 9, characterized in that, The clamping part is integral with the upper wall part. The plurality of clamping portions are arranged in the gap in a pre-compressed state and are pressed to the plurality of adjacent switching members via the plurality of clamping portions.

11. The soundproof cover according to claim 9, characterized in that, The direction in which adjacent switching components are arranged is defined as the side-by-side arrangement direction, and the direction that is approximately orthogonal to both the vertical direction and the side-by-side arrangement direction is defined as the first intersecting direction. The clamping part is made of thermally conductive material. The thermally conductive material comprises a base material and fillers that are incorporated into the base material and have a higher thermal conductivity than the base material. The filler is oriented in at least one of the vertical direction and the first intersecting direction.

12. The soundproof cover according to claim 9, characterized in that, The direction that intersects the vertical direction is defined as the second intersection direction. The upper wall is made of thermally conductive material. The thermally conductive material comprises a base material and fillers that are incorporated into the base material and have a higher thermal conductivity than the base material. The filler is oriented in at least one of the vertical direction and the second intersecting direction.

13. The soundproof cover according to claim 1 or 9, characterized in that, With the volume of the gap being 100%, the occupancy rate of the clamping part relative to the gap is 7% or more.

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