Electrical junction box

Abstract

Provided is an electrical junction box that suppresses vibration of a bus bar. The present invention is provided with: a bus bar (10) having a flat-plate-shaped bus bar base part (11) and a male-tab-shaped bus bar terminal connection part (12A) provided upright from the bus bar base part; a relay member (20) provided with a relay terminal connection part (22); a relay terminal fitting (30) physically and electrically connected to the bus bar terminal connection part and physically and electrically connected to the relay terminal connection part; and a housing (40) that houses the bus bar, the relay component, and the relay terminal fitting, the housing being provided with: a housing member (50) in which a bus bar housing chamber (51) that houses the bus bar is formed; and a cover member (60) that covers the housing member and the bus bar, in which a fixing structure (70) is provided in at least one position between the bus bar base and the housing member, and the fixing structure and the housing member are fixed by inserting one into the other so as to suppress vibration of the bus bar base when vibration accompanying driving of the relay member propagates to the bus bar base via the bus bar terminal connection portion.

Description

Technical Field

[0001] The invention relates to an electrical junction box. Background Art

[0002] The bus bar is housed in a frame of an electrical connection box such as a junction box, and electrically connects at least two electrically connected components. The bus bar is a plate-shaped conductive component formed by pressing a metal plate as a base material, and has a terminal connection portion formed in the shape of a male tab that is directly or indirectly connected to the electrically connected component. An electrical connection box having such a bus bar is disclosed in the following patent document 1.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2010-259228 Summary of the invention

[0006] Technical problem that the invention aims to solve

[0007] However, in the busbar, when the electrically connected object component is a relay component that can be an excitation source, the vibration generated by the drive of the relay component is transmitted to the terminal connection part, and the vibration is propagated from the terminal connection part as the starting point. In addition, in the frame of the electrical junction box, the busbar is accommodated to allow some clearance (looseness), so it is possible to generate abnormal noise caused by the vibration of the busbar. In addition, the busbar is sometimes electrically connected to the relay component via a relay terminal accessory. In this case, the relay terminal accessory is used to indirectly connect its own male tab-shaped terminal connection part with the male tab-shaped terminal connection part of the relay component. Here, in the busbar, when the relay terminal accessory is physically and electrically connected to the terminal connection part by elastic force, it is sufficient to absorb and attenuate the vibration generated by the drive of the relay component through the relay terminal accessory, but the vibration may also be amplified by the relay terminal accessory and transmitted to the terminal connection part.

[0008] Therefore, an object of the present invention is to provide an electric connection box capable of suppressing bus bar vibration.

[0009] Technical solutions to the problem

[0010] The present invention is characterized in that it comprises: a bus bar having a flat bus bar base and a bus bar terminal connection portion in the shape of a male tab extending upward from the bus bar base; a relay component provided with a relay terminal connection portion; a relay terminal accessory physically and electrically connected to the bus bar terminal connection portion and physically and electrically connected to the relay terminal connection portion; and a frame that accommodates the bus bar, the relay component and the relay terminal accessory, the frame comprising: a shell component formed with a bus bar accommodating chamber for accommodating the bus bar; and a cover component that covers the shell component together with the bus bar, a fixing structure being provided at at least one location between the bus bar base and the shell component, the fixing structure fixing each other by inserting one of them into the other, thereby suppressing vibration of the bus bar base when vibration generated by driving the relay component is transmitted to the bus bar base via the bus bar terminal connection portion.

[0011] Effects of the Invention

[0012] The electric junction box of the present invention can attenuate the vibration caused by driving the relay component and transmitted to the busbar base via the busbar terminal connection portion by fixing the busbar base and the housing component with a fixing structure provided therebetween. Therefore, the electric junction box can suppress the busbar vibration and suppress the generation of abnormal noise caused by the busbar vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is an exploded perspective view for explaining the electric junction box according to the embodiment.

[0014] Figure 2 This is a perspective view for explaining the electric junction box according to the embodiment.

[0015] Figure 3 It is a plan view showing the bus bar and the relay terminal fittings accommodated in the bus bar accommodating chamber.

[0016] Figure 4 is Figure 2 A cross-sectional view showing the periphery of the relay terminal fitting extracted from the cross section along the line X1-X1.

[0017] Figure 5 It is a top view showing the fixing structure of the embodiment.

[0018] Figure 6 It is a perspective view showing a bus bar provided with a press-fit portion according to the embodiment.

[0019] Figure 7 This is a plan view showing a part of the bottom wall of the bus bar accommodation chamber provided with the press-fitting hole according to the embodiment extracted and illustrated.

[0020] Figure 8 Yes Figure 5 A partial extraction of the YY line cross section and a 90-degree rotation of the cross section shows the state in which the press-fit portion is pressed into the press-fit hole.

[0021] Fig. 9 1 is a diagram showing simulation analysis results of equivalent radiated power levels related to bus bars of an electric connection box provided with a fixing structure according to an embodiment.

[0022] Fig.10 It is a top view showing the fixing structure of Modification Example 1.

[0023] Fig.11 Yes Fig.10 The partially extracted view of the cross section along the line X2-X2 shows the state of the press-in portion being pressed into the press-in hole.

[0024] Fig.12 1 is a diagram showing simulation analysis results of an equivalent radiated power level related to a bus bar of an electric connection box provided with a fixing structure according to Modification 1. FIG.

[0025] Fig.13 This is a plan view of the fixing structure of Modification 2 as viewed from the bus bar base side.

[0026] Fig.14 This is a plan view of the fixing structure of Modification 2 as viewed from the distal end side of the press-fit portion.

[0027] Fig.15 It is a perspective view showing a bus bar provided with a press-fit portion according to Modification 2.

[0028] Fig.16 This is a perspective view showing a part of the bottom wall of the bus bar accommodation chamber provided with the press-fitting hole according to the second modification.

[0029] Fig.17 1 is a diagram showing simulation analysis results of an equivalent radiated power level related to a bus bar of an electric connection box provided with a fixing structure according to Modification 2. FIG.

[0030] Fig.18 This is a plan view of the fixing structure of Modification 3 as viewed from the bus bar base side.

[0031] Fig.19 This is a plan view of the fixing structure of Modification 3 as viewed from the distal end side of the spring insertion portion.

[0032] Fig. 20 It is a perspective view showing a bus bar provided with a spring insertion portion according to Modification 3.

[0033] Fig.21This is a perspective view showing a part of the bottom wall of the bus bar accommodation chamber provided with the insertion hole according to the modification 3.

[0034] Fig. 22 1 is a diagram showing simulation analysis results of an equivalent radiated power level related to a bus bar of an electric connection box provided with a fixing structure according to Modification 3. FIG.

[0035] Fig.23 It is a top view showing the fixing structure of Modification Example 4.

[0036] Fig.24 It is a perspective view showing a bus bar provided with hook portions according to Modification 4.

[0037] Fig.25 This is a plan view showing a part of the bottom wall of the bus bar accommodation chamber provided with the insertion hole according to Modification 4 extracted and illustrated.

[0038] Fig.26 Yes Fig.23 The partially extracted view of the cross section along the line X3-X3 shows the state where the hook is inserted into the insertion hole.

[0039] Fig. 27 1 is a diagram showing simulation analysis results of an equivalent radiated power level related to a bus bar of an electric connection box provided with a fixing structure according to Modification 4. FIG.

[0040] Description of Reference Numerals

[0041] 1, 2, 3, 4, 5 electrical junction boxes

[0042] 10, 110, 210, 310, 410 busbars

[0043] 11 Bus bar base

[0044] 12A busbar terminal connection

[0045] 20 Relay components

[0046] 22 Relay terminal connection

[0047] 30 Relay terminal accessories

[0048] 40 Frame

[0049] 50, 150, 250, 350, 450 shell parts

[0050] 51 Bus bar storage room

[0051] 51a Bottom wall

[0052] 60 Cover parts

[0053] 70 fixed structure (press-in structure)

[0054] 71 Press-in section

[0055] 72 Press-in hole

[0056] 170 fixed structure (rivet fixed structure)

[0057] 171 Rivet holes

[0058] 172 Rivet Department

[0059] 270 fixed structure (sliding press-in structure)

[0060] 271 Press-in section

[0061] 272 Press-in hole

[0062] 370 fixed structure (spring holding structure)

[0063] 371 Spring insertion part

[0064] 372 Insertion hole

[0065] 470 fixed structure (hook holding structure)

[0066] 471 Hook

[0067] 472 Through hole DETAILED DESCRIPTION

[0068] Hereinafter, an embodiment of the electric junction box according to the present invention will be described in detail based on the drawings. However, the present invention is not limited to this embodiment.

[0069] [Implementation Method]

[0070] based on Figures 1 to 9 One embodiment of the electric connection box according to the present invention will be described.

[0071] Figure 1 The reference numeral 1 shown in the figure indicates an electrical connection box of the present embodiment. The electrical connection box 1 is called a junction box, etc., and electrically connects at least two electrically connected components. The electrical connection box 1 includes: a bus bar 10; a relay component 20 as an electrically connected component; a relay terminal fitting 30 between the bus bar 10 and the relay component 20; and a frame 40 ( Figure 1 and Figure 2 In the electrical connection box 1, the relay component 20 is electrically connected to other electrically connected components via the bus bar 10 and the relay terminal fittings 30 ( Figure 1 ).

[0072] The bus bar 10 is a conductive component formed of a conductive material such as a metal material into a plate shape. For example, the bus bar 10 is formed by stamping using a metal plate as a base material. The bus bar 10 has a flat plate-shaped base (hereinafter referred to as a "bus bar base") 11 and a male tab-shaped terminal connection portion (hereinafter referred to as a "bus bar terminal connection portion") 12 ( Figure 1 and Figure 3 The bus bar 10 shown here has a plurality of bus bar terminal connection portions 12, and the relay component 20 is electrically connected to one of the plurality of bus bar terminal connection portions 12 (hereinafter referred to as "bus bar terminal connection portion 12A") via a relay terminal fitting 30 ( Figure 1 , Figure 3 as well as Figure 4 ).

[0073] Here, the relay component 20 includes a relay body 21 and a terminal connection portion (hereinafter referred to as a “relay terminal connection portion”) 22 protruding from the relay body 21. Figure 1 ). The relay component 20 shown here is provided with a relay terminal connection portion 22 formed in a male tab shape.

[0074] The relay terminal fitting 30 has an electrical connection portion 31 in the tube of the cylindrical terminal body 32, and the electrical connection portion 31 is physically and electrically connected to the busbar terminal connection portion 12A and physically and electrically connected to the relay terminal connection portion 22 ( Figure 4 ). Therefore, the busbar terminal connection portion 12A is electrically connected to the relay terminal connection portion 22 via the relay terminal fitting 30. The relay terminal fitting 30 shown here is formed by press-molding using a metal plate as a base material.

[0075] The electrical connection portion 31 is deformed as the busbar terminal connection portion 12A is inserted, so that its reaction force (elastic force) acts on the plane of the busbar terminal connection portion 12A, and the busbar terminal connection portion 12A is clamped between the electrical connection portion 31 and the inner wall surface of the terminal body 32 ( Figure 4 ). Therefore, the busbar terminal connection portion 12A is physically and electrically connected to the relay terminal fitting 30 by utilizing the elastic force of the relay terminal fitting 30 acting on the plane of the busbar terminal connection portion 12A. In addition, the electrical connection portion 31 is flexed and deformed as the relay terminal connection portion 22 is inserted, so that its reaction force (elastic force) acts on the plane of the relay terminal connection portion 22, and the relay terminal connection portion 22 is clamped between the electrical connection portion 31 and the inner wall surface of the terminal body 32 ( Figure 4). Therefore, the relay terminal connection portion 22 is physically and electrically connected to the relay terminal fitting 30 by utilizing the elastic force of the relay terminal fitting 30 acting on the plane of the relay terminal connection portion 22. However, here, the relay terminal connection portion 22 is clamped between the bulging portion 33 bulging from the inner wall surface of the terminal body 32 and the electrical connection portion 31. The electrical connection portion 31 shown here is formed into a U-shape clamped by the busbar terminal connection portion 12A and the relay terminal connection portion 22 in the tube of the terminal body 32, and a reaction force (elastic force) in opposite directions is applied to the busbar terminal connection portion 12A and the relay terminal connection portion 22.

[0076] As described above, the electrical connection box 1 includes a frame 40 that accommodates the bus bar 10, the relay component 20, and the relay terminal fittings 30. The frame 40 includes a housing component 50 and a cover component 60 ( Figure 1 ).

[0077] The housing member 50 has a housing chamber 51 (hereinafter referred to as a “bus bar housing chamber”) for housing the bus bar 10. Figure 1 and Figure 3 ). The bus bar 10 is accommodated in the bus bar accommodation chamber 51 in a state where the relay terminal fittings 30 are assembled to the bus bar terminal connecting portion 12A. Therefore, the relay terminal fittings 30 are also accommodated in the bus bar accommodation chamber 51.

[0078] The cover member 60 is assembled to the housing member 50 to cover the bus bar 10 and the housing member 50 together. The cover member 60 shown here covers the bus bar 10 and the relay terminal fitting 30 together. Therefore, the cover member 60 is formed with a through hole, and the through hole is used to insert the relay terminal connecting portion 22 into the relay terminal fitting 30. In addition, in the cover member 60, a vertical wall surrounding the through hole is provided on the outer wall surface, and the space inside the vertical wall is used as a storage chamber 61 (hereinafter referred to as a "relay storage chamber") for the relay component 20. Figure 1 ).

[0079] In addition, a portion of the vertical wall of the cover member 60 is cut away, and a holding portion (hereinafter referred to as a "relay holding portion") 62 for holding the relay member 20 in the relay accommodation chamber 61 is provided in the cut away portion. Figure 1 The relay holding portion 62 constitutes a so-called locking mechanism that is hooked on the claw portion 23 protruding from the outer wall surface of the relay body 21 to hold the claw portion 23 ( Figure 1 ).

[0080] In the frame 40, the housing member 50 is not provided with a holding mechanism for holding the bus bar 10 in the bus bar storage chamber 51 (for example, a through hole is provided in the bus bar 10, and a claw portion inserted into the through hole is provided on the vertical wall of the bus bar storage chamber 51, and the claw portion is hooked on the periphery of the through hole to hold the bus bar 10 in the bus bar storage chamber 51). However, in the frame 40, the bus bar 10 is indirectly held by the cover member 60 via the relay member 20 held by the cover member 60 and the relay terminal fitting 30 to which the relay terminal connection portion 22 of the relay member 20 is fitted and connected.

[0081] However, in the relay component 20, vibration is generated due to its switching action of being turned on and off, and this vibration is transmitted to the relay terminal connection part 22. In addition, the vibration generated by the driving of the relay component 20 is transmitted from the relay terminal connection part 22 to the busbar terminal connection part 12A via the relay terminal fitting 30, and is transmitted from the busbar terminal connection part 12A to the busbar base 11. Since the busbar 10 is not fixed to the housing component 50, if the vibration of the relay component 20 is transmitted to the busbar base 11, abnormal noise may be generated due to the vibration of the busbar base 11. In addition, even if the busbar 10 in the busbar storage chamber 51 is retained in the housing component 50 by the aforementioned retaining mechanism, since there is still a clearance (shake) between the claw part and the through hole, the retaining mechanism can also make the busbar 10 move relative to the housing component 50 in the busbar storage chamber 51 by an amount equivalent to the clearance. Therefore, even if the bus bar 10 is held by the housing member 50 by the holding mechanism, if the vibration of the relay component 20 is transmitted to the bus bar base 11 , the bus bar 10 may generate abnormal noise due to the vibration of the bus bar base 11 .

[0082] Therefore, in the present embodiment, a fixing structure 70 is provided at least at one location between the bus bar base 11 and the housing member 50, and one of them is inserted into the other to fix them to each other, so that when the vibration generated by the driving of the relay member 20 is transmitted to the bus bar base 11 via the bus bar terminal connecting portion 12A, the vibration of the bus bar base 11 is suppressed ( Figures 5 to 8 ).

[0083] The fixing structure 70 of the present embodiment is a press-in structure having a press-in portion 71 and a press-in hole 72. The press-in portion 71 is vertically arranged from the bus bar base 11 in the plate thickness direction thereof, and the press-in hole 72 is provided in the bottom wall 51a of the bus bar storage chamber 51 in the housing member 50 and is inserted into the press-in portion 71 for press-in fixing ( Figures 5 to 8In the electrical connection box 1 , when vibration generated by driving the relay component 20 propagates to the busbar base 11 via the busbar terminal connection portion 12A, the vibration is attenuated before being transmitted to the fixing structure 70 , thereby suppressing the vibration of the busbar 10 .

[0084] The press-fit portion 71 is provided to stand upright from the bus bar base 11 in the plate thickness direction toward the bottom wall 51a of the bus bar storage chamber 51 ( Figure 6 and Figure 8 The press-fit portion 71 shown here is formed into a sheet shape in which a plurality of trapezoidal plate-like portions of the same shape are connected in the press-fit direction, and the upper base of the trapezoid faces the bottom wall 51a ( Figure 6 and Figure 8 Here, the three plate-like parts are connected. Also, the press-fit hole 72 is formed as a through hole that penetrates the bottom wall 51a ( Figure 7 and Figure 8 The press-fit hole 72 shown here is formed as a rectangular through hole ( Figure 7 and Figure 8 The press-fit portion 71 is press-fitted and fixed to the press-fit hole 72 while cutting the inner peripheral wall of the press-fit hole 72 using the inclined side wall connecting the upper bottom and the lower bottom of each plate-like portion.

[0085] The configuration position of the fixing structure 70 is determined as follows. Here, the equivalent radiation power level ( Fig. 9 ). In the existing busbar 10conv, the fixing structure 70 is not provided, and the relay component 20 is assembled with the relay component 20 in the busbar terminal connection portion 12A via the relay terminal fitting 30. The analysis result is that in the existing busbar 10conv, vibration is generated near the busbar terminal connection portion 12A in the busbar base 11 (that is, near the vibration input portion of the relay component 20 in the busbar base 11). Therefore, in the electrical junction box 1 of the present embodiment, a fixing structure 70 is configured near the busbar terminal connection portion 12A in the busbar base 11 (that is, near the vibration input portion of the relay component 20 in the busbar base 11). In this example, a fixing structure 70 is provided at a position and a number that reduces the equivalent radiation power level at a specific frequency (the frequency of the vibration generated by the drive of the relay component 20) Fs.

[0086] In this example, the fixing structures 70 are provided at two locations between the bus bar base 11 and the case member 50 , and vibration of the bus bar base 11 is suppressed at each location where the fixing structures 70 are provided. Fig. 9The solid line represents the equivalent radiated power level of the busbar 10 in the electric connection box 1 provided with the fixing structure 70. In the busbar 10, the equivalent radiated power level at the specific frequency Fs can be reduced compared with the conventional busbar 10conv to which the fixing structure 70 is not applied.

[0087] As described above, the electric connection box 1 of the present embodiment can attenuate the vibration caused by the driving of the relay component 20 and propagated to the busbar base 11 via the busbar terminal connection portion 12A by fixing the busbar base 11 and the housing member 50 with the fixing structure 70 provided between them. Therefore, the electric connection box 1 can suppress the vibration of the busbar 10 and suppress the generation of abnormal noise caused by the vibration of the busbar 10. In addition, in the electric connection box 1, when the vibration caused by the driving of the relay component 20 is absorbed and attenuated by the relay terminal fittings 30, the vibration can be suppressed from propagating to the busbar base 11, so the generation of abnormal noise caused by the vibration of the busbar 10 can be further suppressed. On the other hand, in the electric connection box 1, even if the vibration caused by the driving of the relay component 20 is amplified by the relay terminal fittings 30, the busbar 10 can be suppressed from vibrating and suppressing the generation of abnormal noise caused by the vibration of the busbar 10 by providing the fixing structure 70 at an appropriate position.

[0088] Furthermore, the electric junction box 1 of the present embodiment can suppress the bus bar 10 from vibrating, and thus can also suppress the wear of the contact points between the bus bar terminal connecting portion 12A and the relay terminal fittings 30 .

[0089] [Modification 1]

[0090] based on Figures 10 to 12 One modified example of the electric connection box according to the present invention will be described.

[0091] The electric connection box 2 of this modified example is an electric connection box in which the bus bar 10 and the housing member 50 of the frame 40 are replaced with the bus bar 110 and the housing member 150 described below, and the fixing structure 70 of the embodiment provided between the bus bar 10 and the housing member 50 is changed to the fixing structure 170 described below. Fig.10 and Fig.11 Therefore, the same reference numerals as those in the embodiment are given to the parts equivalent to those in the embodiment, and their description is omitted.

[0092] The bus bar 110 of the present modification example has the same bus bar base 11 and bus bar terminal connection portion 12 as the bus bar 10 of the embodiment. Fig.10), so that the relay component 20 is electrically connected to the busbar terminal connection portion 12A among the plurality of busbar terminal connection portions 12 via the relay terminal fitting 30. On the other hand, in the busbar 110 of this modified example, instead of the press-fit portion 71 provided on the busbar base 11 in the busbar 10 of the embodiment, a rivet hole 171 (described later) is provided on the busbar base 11 Fig.11 ).

[0093] In addition, the case member 150 of this modification has the same bus bar storage chamber 51 ( Fig.10 ), the bus bar 110 and the relay terminal fitting 30 are accommodated in the bus bar accommodation chamber 51. On the other hand, in the case member 150 of this modification, instead of the press-fit hole 72 provided in the bottom wall 51a of the bus bar accommodation chamber 51 in the case member 50 of the embodiment, the rivet portion 172 described later is provided in the bottom wall 51a ( Fig.10 and Fig.11 ).

[0094] The fixing structure 170 of this modified example is a rivet fixing structure, which includes: a through-hole-shaped rivet hole 171 provided in the bus bar base 11; and a rivet portion 172, which protrudes from the bottom wall 51a of the bus bar storage chamber 51 in the case member 150 to be inserted into the rivet hole 171 and fixes the bus bar base 11 to the case member 150 by using the end portion after plastic deformation. Fig.10 and Fig.11 In the electrical connection box 2, when vibration generated by driving the relay component 20 propagates to the busbar base 11 via the busbar terminal connection portion 12A, the vibration is attenuated before being transmitted to the fixing structure 170, thereby suppressing the vibration of the busbar 110.

[0095] The rivet hole 171 is formed as a through hole ( Fig.11 The rivet hole 171 shown here is formed as a circular through hole. In addition, the rivet portion 172 is erected from the bottom wall 51a of the bus bar storage chamber 51 toward the bus bar base 11 in the plate thickness direction ( Fig.11 The rivet portion 172 shown here is formed as a cylindrical shaft portion before plastic deformation, and after being inserted into the rivet hole 171, the end is flattened and plastically deformed ( Fig.10 and Fig.11 In the fixing structure 170, the bus bar base 11 is clamped between the bottom wall 51a and the end of the rivet portion 172 after plastic deformation, and the bus bar base 11 is fixed to the case member 150 ( Fig.11 ).

[0096] The configuration position of the fixing structure 170 is the same as that of the fixing structure 70 of the embodiment. The equivalent radiation power level ( Fig.12 Therefore, in the electrical connection box 2 of this modification, the fixing structure 170 is arranged near the busbar terminal connection portion 12A in the busbar base 11 (that is, near the input portion of the vibration of the relay component 20 in the busbar base 11).

[0097] In this example, the fixing structures 170 are provided at two locations between the bus bar base 11 and the case member 150 , and vibration of the bus bar base 11 is suppressed at each location where the fixing structures 170 are provided. Fig.12 The solid line represents the equivalent radiated power level of the bus bar 110 in the electric connection box 2 provided with the fixing structure 170. In the bus bar 110, the equivalent radiated power level at the specific frequency Fs can be reduced compared with the conventional bus bar 10conv to which the fixing structure 170 is not applied.

[0098] As described above, the electric connection box 2 of this modification example can attenuate the vibration caused by the driving of the relay component 20 and propagated to the busbar base 11 via the busbar terminal connection portion 12A by fixing the busbar base 11 and the housing member 150 therebetween. Therefore, the electric connection box 2 can suppress the busbar 110 from vibrating and suppress the generation of abnormal noise caused by the vibration of the busbar 110. In addition, in the electric connection box 2, when the vibration caused by the driving of the relay component 20 is absorbed and attenuated by the relay terminal fittings 30, the vibration can be suppressed from propagating to the busbar base 11, so the generation of abnormal noise caused by the vibration of the busbar 110 can be further suppressed. On the other hand, in the electric connection box 2, even if the relay terminal fittings 30 amplify the vibration caused by the driving of the relay component 20, the fixing structure 170 is provided at an appropriate position, so that the busbar 110 can be suppressed from vibrating and suppress the generation of abnormal noise caused by the vibration.

[0099] Furthermore, the electric junction box 2 of the present modification can suppress the bus bar 110 from vibrating, and thus can also suppress the wear of the contact points between the bus bar terminal connecting portion 12A and the relay terminal fitting 30 .

[0100] [Variation 2]

[0101] based on Figures 13 to 17 One modified example of the electric connection box according to the present invention will be described.

[0102] The electric connection box 3 of this modified example is an electric connection box in which the bus bar 10 and the housing member 50 of the frame 40 are replaced with the bus bar 210 and the housing member 250 described below, and the fixing structure 70 of the embodiment provided between the bus bar 10 and the housing member 50 is changed to the fixing structure 270 described below. Figures 13 to 16 Therefore, the same reference numerals as those in the embodiment are given to the parts equivalent to those in the embodiment, and their description is omitted.

[0103] The bus bar 210 of the present modification example has the bus bar base 11 and the bus bar terminal connection portion 12 ( Figures 13 to 15 ), so that the relay component 20 is electrically connected to the bus bar terminal connection portion 12A among the plurality of bus bar terminal connection portions 12 via the relay terminal fitting 30. On the other hand, in the bus bar 210 of this modification, instead of the press-in portion 71 provided on the bus bar base 11 in the bus bar 10 of the embodiment, a press-in portion 271 described later is provided on the bus bar base 11 ( Figures 13 to 15 ).

[0104] In addition, the case member 250 of this modification has the same bus bar storage chamber 51 ( Fig.13 , Fig.14 and Fig.16 ), the bus bar 210 and the relay terminal fitting 30 are accommodated in the bus bar accommodation chamber 51. On the other hand, in the case member 250 of this modification, a press-in hole 272 described later is provided on the bottom wall 51a, replacing the press-in hole 72 ( Fig.14 and Fig.16 ).

[0105] The fixing structure 270 of this modified example is a sliding press-fit structure, which comprises: a press-fit portion 271 protruding from the bus bar base 11 along its plane; and a press-fit hole 272 ( Figures 13 to 16 In the electrical connection box 3, when vibration generated by driving the relay component 20 propagates to the busbar base 11 via the busbar terminal connection portion 12A, the vibration is attenuated before being transmitted to the fixing structure 270, thereby suppressing the vibration of the busbar 210.

[0106] The press-fit portion 271 protrudes from a portion of the outer peripheral edge of the bus bar base 11 along the plane of the bus bar base 11 ( Fig.15 The press-fit portion 271 shown here is formed in a rectangular sheet shape on the same plane as the bus bar base 11 ( Fig.15). In addition, the press-fit hole 272 is provided in a bulging portion 272a ( Fig.14 and Fig.16 The bulge 272a shown here is formed into a rectangular parallelepiped, with two walls arranged orthogonally to the sliding insertion direction of the press-in portion 271, and the remaining four walls arranged parallel to the sliding insertion direction of the press-in portion 271 ( Fig.16 ). In the bulging portion 272 a , a rectangular through hole bored along the plane of the bus bar base 11 in the sliding insertion direction of the press-fit portion 271 is used as the press-fit hole 272 .

[0107] When the bus bar 210 of this modified example is accommodated in the bus bar accommodation chamber 51, for example, the press-in portion 271 is offset from the bulging portion 272a, and the bus bar base 11 is placed on the bottom wall 51a of the bus bar accommodation chamber 51. Then, the bus bar 210 inserts the press-in portion 271 into the press-in hole 272 while sliding the bus bar base 11 along the bottom wall 51a in the sliding insertion direction of the press-in portion 271. Thus, the press-in portion 271 is pressed and fixed in the press-in hole 272.

[0108] The configuration position of the fixing structure 270 is the same as that of the fixing structure 70 of the embodiment. The equivalent radiation power level ( Fig.17 Therefore, in the electrical connection box 3 of this modification, the fixing structure 270 is arranged near the busbar terminal connection portion 12A in the busbar base 11 (that is, near the input portion of the vibration of the relay component 20 in the busbar base 11).

[0109] In this example, a fixing structure 270 is provided at one location between the bus bar base 11 and the case member 250 , and vibration of the bus bar base 11 is suppressed at the location where the fixing structure 270 is disposed. Fig.17 The solid line represents the equivalent radiated power level of the bus bar 210 in the electric connection box 3 provided with the fixing structure 270. In the bus bar 210, the equivalent radiated power level at the specific frequency Fs can be reduced compared to the conventional bus bar 10conv to which the fixing structure 270 is not applied.

[0110] As described above, the electric connection box 3 of this modification example can attenuate the vibration caused by the driving of the relay component 20 and propagated to the busbar base 11 via the busbar terminal connection portion 12A by fixing the busbar base 11 and the housing member 250 with the fixing structure 270 provided therebetween. Therefore, the electric connection box 3 can suppress the busbar 210 from vibrating and suppress the generation of abnormal noise caused by the vibration of the busbar 210. In addition, in the electric connection box 3, when the relay terminal fittings 30 absorb and attenuate the vibration caused by the driving of the relay component 20, the vibration can be suppressed from propagating to the busbar base 11, so the generation of abnormal noise caused by the vibration of the busbar 210 can be further suppressed. On the other hand, in the electric connection box 3, even if the relay terminal fittings 30 amplify the vibration caused by the driving of the relay component 20, the fixing structure 270 is provided at an appropriate position, so that the busbar 210 can be suppressed from vibrating and suppress the generation of abnormal noise caused by the vibration.

[0111] Furthermore, the electric connection box 3 of the present modification example can suppress the bus bar 210 from vibrating, and thus can also suppress the wear of the contact points between the bus bar terminal connecting portion 12A and the relay terminal fitting 30 .

[0112] [Variation 3]

[0113] based on Figures 18 to 22 One modified example of the electric connection box according to the present invention will be described.

[0114] The electric connection box 4 of this modified example is an electric connection box in which the bus bar 10 and the housing member 50 of the frame 40 are replaced with the bus bar 310 and the housing member 350 described below, and the fixing structure 70 of the embodiment provided between the bus bar 10 and the housing member 50 is changed to the fixing structure 370 described below. Figures 18 to 21 Therefore, the same reference numerals as those in the embodiment are given to the parts equivalent to those in the embodiment, and their description is omitted.

[0115] The bus bar 310 of the present modification example has the bus bar base 11 and the bus bar terminal connection portion 12 ( Figures 18 to 20 ), so that the relay component 20 is electrically connected to the busbar terminal connection portion 12A among the plurality of busbar terminal connection portions 12 via the relay terminal fitting 30. On the other hand, in the busbar 310 of this modified example, instead of the press-fit portion 71 provided on the busbar base 11 in the busbar 10 of the embodiment, a spring insertion portion 371 described later is provided on the busbar base 11 ( Figures 18 to 20 ).

[0116] In addition, the case member 350 of this modification has the same bus bar storage chamber 51 ( Fig.18 , Fig.19 and Fig.21 ), the bus bar accommodating chamber 51 accommodates the bus bar 310 and the relay terminal fitting 30. On the other hand, in the case member 350 of this modification, an insertion hole 372 described later is provided on the bottom wall 51a, instead of the press-fit hole 72 ( Fig.19 and Fig.21 ).

[0117] The fixing structure 370 of this modified example is a spring holding structure, which comprises: a spring insertion portion 371 protruding from the bus bar base 11 and having a flexible structure; and an insertion hole 372, which is provided in the housing member 350 and has an inner peripheral wall that receives the rebound force from the inserted spring insertion portion 371 after bending and deformation, and holds the spring insertion portion 371 ( Figures 18 to 21 In the electrical connection box 4, when vibration generated by driving the relay component 20 is transmitted to the busbar base 11 via the busbar terminal connection portion 12A, the vibration can be attenuated in the fixing structure 370, thereby suppressing the busbar 310 from vibrating.

[0118] The spring insertion portion 371 has a plurality of cantilever beam portions ( Figures 18 to 20 Among the plurality of cantilever beam portions, at least one of the cantilever beam portions is bent toward the bottom wall 51a in a direction intersecting the plane of the bus bar base 11, and at least one of the remaining cantilever beam portions is bent toward the side opposite to the bottom wall 51a side in a direction intersecting the plane of the bus bar base 11 ( Fig. 20 The spring insertion portion 371 shown here includes: a first cantilever beam portion 371a in the shape of a sheet body and a second cantilever beam portion 371b in the shape of a sheet body, which are arranged at intervals from each other in a direction perpendicular to the plane of the bus bar base 11 and in a direction perpendicular to the insertion direction into the insertion hole 372, and are bent toward the bottom wall 51a side; and a third cantilever beam portion 371c in the shape of a sheet body, which is arranged between the first cantilever beam portion 371a and the second cantilever beam portion 371b, and is bent toward the side opposite to the bottom wall 51a side ( Figures 18 to 20 ).

[0119] The insertion hole 372 is provided in a bulging portion 372a ( Fig.19 and Fig.21). The bulge 372a shown here is formed into a rectangular parallelepiped, with two walls arranged orthogonally to the insertion direction of the spring insertion portion 371, and the remaining four walls arranged parallel to the insertion direction of the spring insertion portion 371 ( Fig.21 ). In the bulging portion 372 a , a rectangular through hole bored along the plane of the bus bar base 11 in the insertion direction of the spring insertion portion 371 is used as the insertion hole 372 .

[0120] When the bus bar 310 of this modified example is accommodated in the bus bar accommodation chamber 51, for example, the spring insertion portion 371 is offset from the bulging portion 372a, and the bus bar base 11 is slid along the bottom wall 51a in the insertion direction of the spring insertion portion 371, while the spring insertion portion 371 is inserted into the insertion hole 372. After the spring insertion portion 371 is inserted, the free end of the spring insertion portion 371 is pressed by the inner peripheral wall of the insertion hole 372 (here, the bottom wall 51a), so that the first cantilever beam portion 371a and the second cantilever beam portion 371b are bent and deformed, and the free end is pressed by the inner peripheral wall of the insertion hole 372 (here, the wall of the bulging portion 372a opposite to the bottom wall 51a), so that the third cantilever beam portion 371c is bent and deformed. Therefore, in the fixing structure 370 of this modified example, the respective rebound forces of the first cantilever beam portion 371a and the second cantilever beam portion 371b and the rebound force of the third cantilever beam portion 371c act on the inner circumferential wall of the insertion hole 372 respectively, thereby pressing the spring insertion portion 371 into and fixing it in the insertion hole 372.

[0121] The configuration position of the fixing structure 370 is the same as that of the fixing structure 70 of the embodiment. The equivalent radiation power level ( Fig. 22 Therefore, in the electrical connection box 4 of this modification, the fixing structure 370 is arranged near the busbar terminal connection portion 12A in the busbar base 11 (that is, near the input portion of the vibration of the relay component 20 in the busbar base 11).

[0122] In this example, a fixing structure 370 is provided at one location between the bus bar base 11 and the case member 350 , and vibration of the bus bar base 11 is suppressed at the location where the fixing structure 370 is arranged. Fig. 22 The solid line represents the equivalent radiated power level of the bus bar 310 in the electric connection box 4 provided with the fixing structure 370. In the bus bar 310, the equivalent radiated power level at the specific frequency Fs can be reduced compared with the conventional bus bar 10conv to which the fixing structure 370 is not applied.

[0123] As described above, the electric connection box 4 of this modification example can attenuate the vibration caused by the driving of the relay component 20 and propagated to the busbar base 11 via the busbar terminal connection portion 12A by fixing the busbar base 11 and the housing member 350 with the fixing structure 370 provided between them. Therefore, the electric connection box 4 can suppress the busbar 310 from vibrating and suppress the generation of abnormal noise caused by the vibration of the busbar 310. In addition, in the electric connection box 4, when the vibration caused by the driving of the relay component 20 is absorbed and attenuated by the relay terminal fittings 30, the vibration can be suppressed from propagating to the busbar base 11, so the generation of abnormal noise caused by the vibration of the busbar 310 can be further suppressed. On the other hand, in the electric connection box 4, even if the relay terminal fittings 30 amplify the vibration caused by the driving of the relay component 20, the fixing structure 370 is provided at an appropriate position, so that the busbar 310 can be suppressed from vibrating and suppress the generation of abnormal noise caused by the vibration.

[0124] Furthermore, the electric connection box 4 of the present modification example can suppress the bus bar 310 from vibrating, and thus can also suppress the wear of the contact points between the bus bar terminal connecting portion 12A and the relay terminal fitting 30 .

[0125] [Variation 4]

[0126] based on Figure 23 to Figure 27 One modified example of the electric connection box according to the present invention will be described.

[0127] The electric connection box 5 of this modified example is an electric connection box in which the bus bar 10 and the housing member 50 of the frame 40 are replaced with the bus bar 410 and the housing member 450 described below, and the fixing structure 70 of the embodiment provided between the bus bar 10 and the housing member 50 is changed to the fixing structure 470 described below. Figure 23 to Figure 26 Therefore, the same reference numerals as those in the embodiment are given to the parts equivalent to those in the embodiment, and their description is omitted.

[0128] The bus bar 410 of this modification example has the same bus bar base 11 and bus bar terminal connection portion 12 as the bus bar 10 of the embodiment. Fig.23 and Fig.24 ), so that the relay component 20 is electrically connected to the busbar terminal connection portion 12A among the plurality of busbar terminal connection portions 12 via the relay terminal fitting 30. On the other hand, in the busbar 410 of this modification, instead of the press-fit portion 71 provided on the busbar base 11 in the busbar 10 of the embodiment, a hook portion 471 described later is provided on the busbar base 11 ( Fig.23 , Fig.24 and Fig.26 ).

[0129] In addition, the case member 450 of this modification has the same bus bar storage chamber 51 ( Fig.23 , Fig.25 and Fig.26 ), the bus bar 410 and the relay terminal fitting 30 are accommodated in the bus bar accommodation chamber 51. On the other hand, in the case member 450 of this modification, the bottom wall 51a is provided with an insertion hole 472 described later, instead of the press-fit hole 72 ( Fig.25 and Fig.26 ).

[0130] The fixing structure 470 of this modified example comprises: a cantilever hook portion 471 protruding in a crank shape from the bus bar base 11; and an insertion hole 472, which is a through hole provided in the flat plate portion (here, the bottom wall 51a) of the housing member 450 and through which the hook portion 471 is inserted and hooked on the periphery of the hole ( Figure 23 to Figure 26 The fixing structure 470 is a hooking and holding structure as follows: a force is applied to one plane of the flat plate portion (bottom wall 51a) from the free end of the hook portion 471 inserted into the insertion hole 472, and a force is applied to the other plane of the flat plate portion (bottom wall 51a) from the fixed end of the hook portion 471, so that the hook portion 471 is hooked on the hole periphery of the insertion hole 472 and held ( Fig.26 In the electrical connection box 5, when vibration generated by driving the relay component 20 propagates to the busbar base 11 via the busbar terminal connection portion 12A, the vibration is attenuated before being transmitted to the fixing structure 470, thereby suppressing the vibration of the busbar 410.

[0131] The hook portion 471 is formed into a cantilever beam shape (a crank-shaped cantilever beam) that is bent toward the bottom wall 51a in the direction intersecting the plane of the bus bar base 11 in the middle of its protruding direction and bent again at its end. Fig.24 and Fig.26 The hook portion 471 shown here is formed in a sheet shape. Furthermore, the insertion hole 472 is formed as a through hole ( Fig.25 and Fig.26 The insertion hole 472 shown here is formed as a rectangular through hole ( Fig.25 ). The hook 471 is inserted from its distal end into the insertion hole 472. Thus, the hook 471 applies force to one plane of the bottom wall 51a from the free end of the inserted portion and applies force to the other plane of the bottom wall 51a from the fixed end, and is hooked on the periphery of the insertion hole 472 and fixed.

[0132] The configuration position of the fixing structure 470 is the same as that of the fixing structure 70 of the embodiment. The equivalent radiation power level ( Fig. 27 Therefore, in the electrical connection box 5 of this modification, the fixing structure 470 is arranged near the busbar terminal connection portion 12A in the busbar base 11 (that is, near the input portion of the vibration of the relay component 20 in the busbar base 11).

[0133] In this example, the fixing structures 470 are provided at two locations between the bus bar base 11 and the case member 150 , and the vibration of the bus bar base 11 is suppressed at each location where the fixing structures 470 are provided. Fig. 27 The solid line represents the equivalent radiated power level of the bus bar 410 in the electric connection box 5 provided with the fixing structure 470. In the bus bar 410, the equivalent radiated power level at the specific frequency Fs can be reduced compared with the conventional bus bar 10conv to which the fixing structure 470 is not applied.

[0134] As described above, the electric connection box 5 of this modification example can attenuate the vibration caused by the driving of the relay component 20 and propagated to the busbar base 11 via the busbar terminal connection portion 12A by fixing the busbar base 11 and the housing member 450 with the fixing structure 470 provided between them. Therefore, the electric connection box 5 can suppress the busbar 410 from vibrating and suppress the generation of abnormal noise caused by the vibration of the busbar 410. In addition, in the electric connection box 5, when the vibration caused by the driving of the relay component 20 is absorbed and attenuated by the relay terminal fittings 30, the vibration can be suppressed from propagating to the busbar base 11, so the generation of abnormal noise caused by the vibration of the busbar 410 can be further suppressed. On the other hand, in the electric connection box 5, even if the vibration caused by the driving of the relay component 20 is amplified in the relay terminal fittings 30, the fixing structure 470 is provided at an appropriate position, so that the busbar 410 can be suppressed from vibrating and suppressing the generation of abnormal noise caused by the vibration.

[0135] Furthermore, the electric connection box 5 of the present modification example can suppress the bus bar 410 from vibrating, and thus can also suppress the wear of the contact points between the bus bar terminal connecting portion 12A and the relay terminal fitting 30 .

Claims

1. An electrical junction box, characterized in that: have: A bus bar having a flat bus bar base and a male tab-shaped bus bar terminal connection portion erected from the bus bar base; a relay component, wherein the relay component is provided with a relay terminal connecting portion; a relay terminal fitting that is physically and electrically connected to the bus bar terminal connecting portion and that is physically and electrically connected to the relay terminal connecting portion; and a frame body accommodating the bus bar, the relay component and the relay terminal fittings, The frame includes: a case member having a bus bar storage chamber for storing the bus bar; and a cover member for covering the case member together with the bus bar. A fixing structure is provided at at least one location between the bus bar base and the shell component, and the fixing structure fixes them to each other by inserting one of them into the other, thereby suppressing the vibration of the bus bar base when the vibration generated by the driving of the relay component is transmitted to the bus bar base via the bus bar terminal connecting portion.

2. The electrical connection box according to claim 1, characterized in that: The fixing structure is a press-in structure having a press-in portion and a press-in hole, wherein the press-in portion is erected from the bus bar base along its plate thickness direction, and the press-in hole is provided on the bottom wall of the bus bar accommodating chamber in the shell component and is inserted and pressed into the bottom wall for fixing.

3. The electrical connection box according to claim 1, characterized in that: The fixing structure is a rivet fixing structure, which includes: a rivet hole in the shape of a through hole, which is arranged in the bus bar base; and a rivet part, which protrudes from the bottom wall of the bus bar accommodating chamber in the shell part in order to be inserted into the rivet hole, and uses the end after plastic deformation to fix the bus bar base to the shell part.

4. The electrical connection box according to claim 1, characterized in that: The fixing structure is a sliding press-in structure, which includes: a press-in portion, which protrudes from the bus bar base along the plane of the bus bar base; and a press-in hole, which is provided in the shell part and allows the press-in portion to be slidably inserted along its protruding direction and pressed in and fixed.

5. The electrical connection box according to claim 1, characterized in that: The fixing structure is a spring holding structure, which includes: a spring insertion portion, which protrudes from the bus bar base and has flexibility; and an insertion hole, which is arranged in the shell part, and the inner peripheral wall of the insertion hole receives the rebound force from the inserted spring insertion portion after bending and deformation to hold the spring insertion portion.

6. The electrical connection box according to claim 1, characterized in that: The fixing structure is a hook holding structure, which includes: a cantilever hook portion protruding from the bus bar base in a crank shape; and an insertion hole, which is a through hole provided in the flat plate portion of the housing member, and the hook portion is inserted through and hooked on the periphery of the hole. The hook is hooked on the hole periphery of the insertion hole and held by applying force to one plane of the flat plate portion from the free end of the hook portion inserted through the insertion hole and applying force to the other plane of the flat plate portion from the fixed end of the hook portion.

7. The electrical connection box according to any one of claims 1 to 6, characterized in that: The bus bar terminal connection portion is physically and electrically connected to the relay terminal fitting by utilizing an elastic force applied by the relay terminal fitting to a plane of the bus bar terminal connection portion.

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