Electrical junction box

Abstract

To suppress vibration of a bus bar.SOLUTION: An electric connection box includes a bus bar 10 having a flat bus bar base 11 and a male tab-shaped bus bar terminal connection portion 12A erected from the bus bar base, a relay component 20 provided with a relay terminal connection portion 22, an intermediate terminal fitting 30 that physically and electrically connects the bus bar terminal connection portion and also physically and electrically connects the relay terminal connection portion, and a housing 40 that accommodates the bus bar, the relay component and the intermediate terminal fitting. The housing includes a case member 50 in which a bus bar accommodating chamber 51 that accommodates the bus bar is formed, and a cover member 60 that covers the case member together with the bus bar, the bus bar is provided with at least one vibration damping portion 13 that damps vibrations associated with operation of the relay component that are propagated to the bus bar base via the bus bar terminal connection portion, and the bus bar base is sandwiched between the case member and the cover member via the vibration damping portion.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] A bus bar is housed in the housing of an electrical connection box such as a junction box, and electrically connects at least two components to be electrically connected. This bus bar is, for example, a plate-shaped conductive member press-formed from a metal plate as a base material, and has terminal connection portions formed in the shape of male tabs to which the components to be electrically connected are directly or indirectly connected. An electrical connection box equipped with this type of bus bar is disclosed in Patent Document 1 listed below. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-259228 Summary of the Invention [Problem to be solved by the invention]

[0004] In the case of a bus bar, if the electrically connected component is a relay component that can be a vibration source, vibrations caused by the relay component being driven are transmitted to the terminal connection portion, and these vibrations propagate from the terminal connection portion. Because the bus bar is housed in the housing of the electrical connection box with some degree of play (backlash), there is a risk of abnormal noise being generated by the bus bar vibration. In addition, the bus bar may be electrically connected to the relay component via an intermediate terminal fitting, in which case the intermediate terminal fitting indirectly connects the bus bar's male tab-shaped terminal connection portion to the male tab-shaped terminal connection portion of the relay component. In the case of a bus bar, if the intermediate terminal fitting physically and electrically connects the terminal connection portion using spring force, it is sufficient for the intermediate terminal fitting to absorb and attenuate vibrations caused by the relay component being driven. However, the intermediate terminal fitting may amplify the vibrations and transmit them to the terminal connection portion.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an electrical junction box that can suppress vibration of bus bars. [Means for solving the problem]

[0006] The present invention is characterized in that it comprises a bus bar having a flat bus bar base and a male tab-shaped bus bar terminal connection portion standing upright from the bus bar base, a relay component provided with a relay terminal connection portion, an intermediate terminal fitting that physically and electrically connects the bus bar terminal connection portion and also physically and electrically connects the relay terminal connection portion, and a housing that accommodates the bus bar, the relay component, and the intermediate terminal fitting, wherein the housing comprises a case member that has a bus bar accommodating chamber that accommodates the bus bar, and a cover member that covers the case member together with the bus bar, and at least one of the bus bar and the housing is provided with at least one vibration damping portion that damps vibrations caused by driving the relay component and that are propagated to the bus bar base via the bus bar terminal connection portion, and the bus bar base is sandwiched between the case member and the cover member via the vibration damping portion. [Effects of the Invention]

[0007] The electrical junction box according to the present invention can attenuate vibrations caused by the operation of the relay components and transmitted to the bus bar base via the bus bar terminal connection portion by the vibration attenuation portion provided on either the bus bar base or the cover member, thereby suppressing vibrations of the bus bar and reducing the generation of abnormal noise caused by the vibrations. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is an exploded perspective view illustrating an electrical junction box according to an embodiment. [Figure 2] FIG. 2 is a perspective view illustrating the electrical junction box according to the embodiment. [Figure 3] FIG. 3 is a plan view showing the bus bar and the intermediate terminal metal fitting housed in the bus bar housing. [Figure 4]4 is a cross-sectional view of the periphery of the intermediate terminal metal fitting taken along the line X1-X1 in FIG. [Figure 5] FIG. 5 is a diagram showing an example of a simulation analysis result of an equivalent radiation power level for a bus bar provided with a vibration damping portion. [Figure 6] FIG. 6 is a diagram showing another example of the results of simulation analysis of the equivalent radiation power level regarding the bus bar when the vibration damping portion is provided on the cover member. [Figure 7] FIG. 7 is a diagram showing another example of the results of simulation analysis of the equivalent radiation power level regarding the bus bar when a vibration damping portion of another type is provided on the cover member. [Figure 8] FIG. 8 is a plan view showing an example of a bus bar provided with a vibration damping portion. [Figure 9] FIG. 9 is a cross-sectional view taken along line X2-X2 in FIG. 8, showing the state in which the bus bar is sandwiched between the case member and the cover member. [Figure 10] FIG. 10 is a plan view showing a part of an example of a cover member provided with a vibration damping portion. [Figure 11] FIG. 11 is a cross-sectional view taken along line X3-X3 in FIG. 10, showing the state in which the bus bar is sandwiched between the case member and the cover member. [Figure 12] FIG. 12 is a plan view showing a part of an example of a cover member provided with a vibration damping portion of another type. [Figure 13] FIG. 13 is a cross-sectional view taken along line YY of FIG. 12 rotated 90 degrees, showing the state in which the bus bar is sandwiched between the case member and the cover member. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electrical junction box according to the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention is not limited to this embodiment.

[0010] [Embodiment] An embodiment of an electrical junction box according to the present invention will be described with reference to FIGS. 1 to 13. FIG.

[0011] Reference numeral 1 in FIG. 1 indicates an electrical connection box of this embodiment. This electrical connection box 1 is also called a junction box or the like, and electrically connects at least two components to be electrically connected. This electrical connection box 1 includes a bus bar 10, a relay component 20 as a component to be electrically connected, an intermediate terminal fitting 30 interposed between the bus bar 10 and the relay component 20, and a housing 40 that accommodates these components (FIGS. 1 and 2). In this electrical connection box 1, the relay component 20 is electrically connected to another component to be electrically connected via the bus bar 10 and the intermediate terminal fitting 30 (FIG. 1).

[0012] The busbar 10 is a conductive member formed into a plate shape from a conductive material such as a metal material. For example, the busbar 10 is press-formed using a metal plate as a base material. The busbar 10 has a flat base portion (hereinafter referred to as the "busbar base portion") 11 and a male tab-shaped terminal connection portion (hereinafter referred to as the "busbar terminal connection portion") 12 extending from the busbar base portion 11 (FIGS. 1 and 3). The busbar 10 shown here has a plurality of busbar terminal connection portions 12, and a relay component 20 is electrically connected to one of the plurality of busbar terminal connection portions 12 (hereinafter referred to as the "busbar terminal connection portion 12A") via an intermediate terminal fitting 30 (FIGS. 1, 3, and 4).

[0013] 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 (FIG. 1). The relay component 20 shown here is provided with the relay terminal connection portion 22 formed in the shape of a male tab.

[0014] The relay terminal fitting 30 physically and electrically connects the bus bar terminal connection portion 12A and has an electrical connection portion 31 inside the cylindrical terminal body 32 that physically and electrically connects the relay terminal connection portion 22 (FIG. 4). Therefore, the bus bar 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 press-formed using a metal plate as the base material.

[0015] The electrical connection portion 31 flexes and deforms as the bus bar terminal connection portion 12A is inserted, and the reaction force (spring force) acts on the flat surface of the bus bar terminal connection portion 12A, clamping the bus bar terminal connection portion 12A between the electrical connection portion 31 and the inner wall surface of the terminal body 32 (FIG. 4). Therefore, the bus bar terminal connection portion 12A is physically and electrically connected to the intermediate terminal fitting 30 by the spring force that the intermediate terminal fitting 30 applies to the flat surface of the bus bar terminal connection portion 12A. Furthermore, the electrical connection portion 31 flexes and deforms as the relay terminal connection portion 22 is inserted, and the reaction force (spring force) acts on the flat surface of the relay terminal connection portion 22, clamping the relay terminal connection portion 22 between the electrical connection portion 31 and the inner wall surface of the terminal body 32 (FIG. 4). Therefore, the relay terminal connection portion 22 is physically and electrically connected to the intermediate terminal fitting 30 by the spring force that the intermediate terminal fitting 30 applies to the flat surface of the relay terminal connection portion 22. However, here, relay terminal connection portion 22 is sandwiched between bulging portion 33 that bulges out from the inner wall surface of terminal body 32 and electrical connection portion 31. Electrical connection portion 31 shown here is formed in a U-shape that is sandwiched between bus bar terminal connection portion 12A and relay terminal connection portion 22 inside the cylindrical terminal body 32, and applies reaction forces (spring forces) in opposite directions to bus bar terminal connection portion 12A and relay terminal connection portion 22.

[0016] As previously described, the electrical junction box 1 includes a housing 40 that houses the bus bar 10, the relay component 20, and the relay terminal fittings 30. The housing 40 is molded from an insulating material such as synthetic resin, and includes a case member 50 and a cover member 60 that are assembled together (FIG. 1).

[0017] The case member 50 has an accommodation chamber 51 (hereinafter referred to as the "bus bar accommodation chamber") formed therein for accommodating the bus bar 10 (FIGS. 1 and 3). The bus bar 10 is accommodated in the bus bar accommodation chamber 51 with the intermediate terminal fitting 30 attached to the bus bar terminal connection portion 12A. Therefore, the bus bar accommodation chamber 51 also accommodates the intermediate terminal fitting 30.

[0018] The cover member 60 is attached to the case member 50 to cover the case member 50 together with the bus bar 10. The cover member 60 shown here covers the relay terminal fittings 30 together with the bus bar 10. Therefore, the cover member 60 has through holes formed therein for inserting the relay terminal connecting portions 22 into the relay terminal fittings 30. The cover member 60 has an outer wall surface provided with a vertical wall surrounding the through holes, and the space inside the vertical wall is used as a chamber 61 for accommodating the relay component 20 (hereinafter referred to as the "relay accommodating chamber") (FIG. 1).

[0019] Furthermore, a part of the upright wall of the cover member 60 is cut out, and a holding portion (hereinafter referred to as "relay holding portion") 62 that holds the relay component 20 in the relay accommodating chamber 61 is provided in the cutout portion (FIG. 1). The relay holding portion 62 constitutes a so-called locking mechanism that hooks onto the claw portion 23 that protrudes from the outer wall surface of the relay body 21 and holds the claw portion 23 (FIG. 1).

[0020] In this housing 40, the case member 50 is not provided with a holding mechanism for holding the bus bar 10 in the bus bar accommodating chamber 51 (for example, a mechanism for holding the bus bar 10 in the bus bar accommodating chamber 51 by providing a through hole in the bus bar 10, providing a vertical wall of the bus bar accommodating chamber 51 with a claw portion that is inserted into the through hole and hooking the claw portion onto the periphery of the through hole). However, in this housing 40, the bus bar 10 is indirectly held relative to the cover member 60 via the relay component 20 held in the cover member 60 and the relay terminal fitting 30 to which the relay terminal connecting portion 22 of the relay component 20 is fitted and connected.

[0021] In relay component 20, vibrations are generated by its on / off switching operation, and the vibrations are transmitted to relay terminal connection portion 22. The vibrations caused by the driving of relay component 20 are transmitted from relay terminal connection portion 22 to bus bar terminal connection portion 12A via relay terminal fitting 30, and then propagated from bus bar terminal connection portion 12A to bus bar base 11. Because bus bar 10 is not fixed to case member 50, if the vibrations of relay component 20 propagate to bus bar base 11, the vibrations of bus bar base 11 may generate abnormal noise. Furthermore, even if bus bar 10 in bus bar accommodating chamber 51 is held in case member 50 by the aforementioned holding mechanism, the holding mechanism has play (backlash) between the claw portion and the through hole, and therefore, bus bar 10 can move relative to case member 50 within bus bar accommodating chamber 51 by the amount of play. Therefore, even if the busbar 10 is held in the case member 50 by its holding mechanism, if vibrations of the relay component 20 are transmitted to the busbar base 11, there is a risk that abnormal noise will be generated due to the vibrations of the busbar base 11.

[0022] Therefore, in this embodiment, at least one of the bus bar 10 and the housing 40 is configured as described below to suppress the generation of abnormal noise caused by vibrations accompanying the driving of the relay component 20. Specifically, at least one of the bus bar 10 and the housing 40 is provided with at least one vibration damping section that damps vibrations accompanying the driving of the relay component 20 that are propagated to the bus bar base 11 via the bus bar terminal connection section 12A. The bus bar base 11 is sandwiched between the case member 50 and the cover member 60 via the vibration damping section. As a result, in this electrical junction box 1, vibrations accompanying the driving of the relay component 20 that are propagated to the bus bar base 11 via the bus bar terminal connection section 12A are absorbed and damped by the vibration damping section, thereby suppressing vibrations of the bus bar base 11.

[0023] As will be described in detail below, in the electrical connection box 1 illustrated here, a vibration damping portion is provided on either the bus bar base 11 or the cover member 60, and the bus bar base 11 is sandwiched between the case member 50 and the cover member 60 via this vibration damping portion.

[0024] The location of the vibration damping section is determined as follows. Here, the equivalent radiation power level of the conventional bus bar 10conv is obtained by simulation analysis (two-dot chain lines in FIGS. 5 to 7 ). This conventional bus bar 10conv is not provided with a vibration damping section, and the relay component 20 is attached to the bus bar terminal connection portion 12A via the relay terminal fitting 30. As a result of the analysis, in the conventional bus bar 10conv, vibration occurs near the bus bar terminal connection portion 12A at the bus bar base 11 (i.e., near the vibration input portion of the relay component 20 at the bus bar base 11). Therefore, in the electrical junction box 1 of this embodiment, the vibration damping section is arranged so that the vicinity of the bus bar terminal connection portion 12A at the bus bar base 11 (i.e., near the vibration input portion of the relay component 20 at the bus bar base 11) is sandwiched between the case member 50 and the cover member 60. In this example, vibration attenuators are provided in positions and quantities that reduce the equivalent radiation power level at a specific frequency Fs (the frequency of vibration caused by driving the relay component 20).

[0025] First, we will explain the vibration damping portion provided on the bus bar base 11. Figures 8 and 9 show a bus bar 10A having a vibration damping portion 13 provided on the bus bar base 11. This vibration damping portion 13 is a spring-shaped portion that is pressed against the cover member 60, thereby sandwiching the bus bar base 11 between the case member 50 and the cover member 60 by a resilient force generated between the cover member 60 and the vibration damping portion 13. This vibration damping portion 13 is a spring-shaped portion that protrudes from a first flat surface 11a on the cover member 60 side of the bus bar base 11 toward the cover member 60, and is formed in the shape of a double-supported beam that presses its middle portion against the cover member 60 (Figure 9). Here, a cover member 60A is used (FIG. 9), which has an opposing wall 63a disposed opposite the bus bar base 11 with a gap therebetween, a standing wall 63b extending vertically from the opposing wall 63a toward the bus bar base 11, and an opposing wall (hereinafter referred to as the "adjacent opposing wall") 63c disposed adjacent to the vibration damping portion 13 via the standing wall 63b and closer to the bus bar base 11 than the opposing wall 63a. Thus, the vibration damping portion 13 is a spring-shaped portion that protrudes toward the adjacent opposing wall 63c from the first flat surface 11a on the bus bar base 11's adjacent opposing wall 63c side, and is formed in the shape of a doubly supported beam with its middle portion pressed against the adjacent opposing wall 63c. The vibration damping portion 13 presses its middle portion, which serves as a pressing portion against the cover member 60A, against the adjacent opposing wall 63c of the cover member 60A, generating a resilient force between the cover member 60A and the second flat surface 11b of the busbar base 11 on the bottom surface 51a of the busbar accommodating chamber 51 side against the bottom surface 51a. Thus, the busbar base 11 is sandwiched between the bottom surface 51a of the busbar accommodating chamber 51 and the adjacent opposing wall 63c of the cover member 60A via the vibration damping portion 13. In this example, the busbar base 11 is provided with two vibration damping portions 13, and vibrations are damped at each of the locations where the vibration damping portions 13 are provided. The solid line in FIG. 5 indicates the equivalent radiated power level of the busbar 10A equipped with the vibration damping portion 13. The equivalent radiated power level at a specific frequency Fs of the busbar 10A can be reduced compared to a conventional busbar 10conv that does not employ the vibration damping portion 13.

[0026] Next, the vibration damping portion provided on the cover member 60 will be described. The bus bar 10 used here is molded in the same shape as the conventional bus bar 10conv. FIGS. 10 and 11 show a cover member 60B provided with a vibration damping portion 64. Like the cover member 60A, this cover member 60B has an opposing wall 63a, a standing wall 63b, and an adjacent opposing wall 63c. The vibration damping portion 64 is a spring-shaped portion that presses against the bus bar base 11, generating a resilient force between the bus bar base 11 and the case member 50 and the cover member 60B, thereby sandwiching the bus bar base 11. The vibration damping portion 64 is a spring-shaped portion that protrudes from the adjacent opposing wall 63c of the cover member 60B toward the bus bar base 11, and is formed in a double-supported beam shape with its middle portion pressing against the bus bar base 11 (FIG. 11). The vibration damping portion 64 presses its middle portion, which serves as a pressing portion against the busbar base 11, against the first flat surface 11a of the busbar base 11, generating a resilient force between the busbar base 11 and the busbar base 11, and presses the second flat surface 11b of the busbar base 11 against the bottom surface 51a of the busbar housing chamber 51. Thus, the busbar base 11 is sandwiched between the bottom surface 51a of the busbar housing chamber 51 and the cover member 60B via the vibration damping portion 64. In this example, the vibration damping portions 64 are provided at two locations on the cover member 60B, and vibrations are damped at each location of the busbar base 11 that the vibration damping portions 64 contact. The solid line in FIG. 6 shows the equivalent radiated power level of the busbar 10 when the vibration damping portion 64 is used. The equivalent radiated power level of the busbar 10 at a specific frequency Fs can be reduced compared to a conventional busbar 10 without the vibration damping portion 64.

[0027] Next, another embodiment of the vibration damping portion provided on the cover member 60 will be described. The busbar 10 used here is molded in the same shape as the conventional busbar 10conv. FIGS. 12 and 13 show a cover member 60C provided with a vibration damping portion 65. Like the cover member 60A, this cover member 60C has an opposing wall 63a and a standing wall 63b, but does not have an adjacent opposing wall 63c. Like the vibration damping portion 64, the vibration damping portion 65 is a spring-shaped portion that presses against the busbar base 11 and generates a resilient force between the busbar base 11 and the case member 50 to sandwich the busbar base 11 between the cover member 60C and the cover member 60C. However, this vibration damping portion 65 is a cantilever-shaped spring-shaped portion that presses its free end against the busbar base 11 (FIG. 13). For example, in the cover member 60C, the vibration damping portion 65 protrudes from the wall surface of the standing wall 63b. The vibration damping section 65 has a cantilevered flexible section 65a that protrudes from the wall surface of the upright wall 63b and is capable of being flexibly deformed, and a pressing section 65b that is provided at the free end of the flexible section 65a and can be pressed against the busbar base 11 when the assembly of the case member 50 and the cover member 60 is completed (FIGS. 12 and 13). The flexible section 65a flexibly deforms in the direction of attaching / detaching the cover member 60C to / from the case member 50. The vibration damping section 65 presses the pressing section 65b, which is a pressing section for pressing against the busbar base 11, against the first flat surface 11a of the busbar base 11 to generate a resilient force between the busbar base 11 and the pressing section 65b, and presses the second flat surface 11b of the busbar base 11 against the bottom surface 51a of the busbar accommodating chamber 51. Therefore, the busbar base 11 is sandwiched between the bottom surface 51a of the busbar accommodating chamber 51 and the cover member 60C via the vibration damping portion 65. In this example, the vibration damping portions 65 are provided at two locations on the cover member 60C, and vibration is damped at each location on the busbar base 11 where the vibration damping portions 65 contact. The solid line in FIG. 7 shows the equivalent radiation power level of the busbar 10 when the vibration damping portion 65 is used. With this busbar 10, the equivalent radiation power level at a specific frequency Fs can be reduced compared to a conventional busbar 10conv that does not use the vibration damping portion 65.

[0028] As described above, the electrical junction box 1 of this embodiment can attenuate vibrations caused by the driving of the relay component 20, which are propagated to the bus bar base 11 via the bus bar terminal connection portion 12A, by the vibration attenuating portions 13, 64, and 65 provided on either the bus bar base 11 or the cover member 60. Therefore, the electrical junction box 1 can suppress the vibration of the bus bar 10 (10A) and the generation of abnormal noise caused by the vibration of the bus bar 10 (10A). Furthermore, in the electrical junction box 1, when the relay terminal fittings 30 absorb and attenuate the vibrations caused by the driving of the relay component 20, the propagation of the vibrations to the bus bar base 11 can be suppressed, thereby further suppressing the generation of abnormal noise caused by the vibration of the bus bar 10 (10A). On the other hand, in this electrical connection box 1, even if the relay terminal fittings 30 amplify the vibrations caused by driving the relay component 20, by providing vibration damping sections 13, 64, 65 in appropriate positions, the vibrations of the busbar 10 (10A) can be suppressed, and the generation of abnormal noise caused by the vibrations can be suppressed.

[0029] Furthermore, since the vibration damping portion 65 has a cantilevered shape, there is a greater degree of freedom in arranging the pressing portion (pressing portion 65b) against the bus bar base 11 compared to a doubly supported beam shape. Therefore, by applying the cantilevered vibration damping portion 65 to the electrical junction box 1, the bus bar base 11 can be sandwiched at a more appropriate position, thereby improving the effect of suppressing the generation of abnormal noise caused by vibration of the bus bar 10.

[0030] Furthermore, the electrical junction box 1 of this embodiment can suppress vibration of the bus bar 10 (10A), so that wear of the contact points between the bus bar terminal connecting portion 12A and the intermediate terminal fitting 30 can also be suppressed. [Explanation of symbols]

[0031] 1 Electrical junction box 10,10A bus bar 11 Busbar base 12A bus bar terminal connection 13,64,65 Vibration damping section 20 Relay parts 22 Relay terminal connection 30 Relay terminal fitting 40 cabinets 50 Case material 51 Bus Bar Containment Room 60, 60A, 60B, 60C Cover member

Claims

1. 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 provided with a relay terminal connection portion; a relay terminal fitting that physically and electrically connects the bus bar terminal connection portion and also physically and electrically connects the relay terminal connection portion; a housing that accommodates the bus bar, the relay component, and the relay terminal fitting; Equipped with the housing includes a case member having a bus bar accommodating chamber for accommodating the bus bar, and a cover member for covering the case member together with the bus bar; At least one of the bus bar and the housing is provided with at least one vibration damping portion that damps vibration caused by driving of the relay component and transmitted to the bus bar base via the bus bar terminal connection portion, The bus bar base is sandwiched between the case member and the cover member via the vibration damping portion.

2. 2. The electrical connection box according to claim 1, wherein the vibration damping portion is a spring-shaped portion provided at the bus bar base and pressed against the cover member to generate a resilient force between the cover member and the bus bar base, thereby sandwiching the bus bar base between the case member and the cover member.

3. 2. The electrical connection box according to claim 1, wherein the vibration damping portion is a spring-shaped portion provided on the cover member, pressed against the bus bar base to generate a resilient force between the cover member and the case member, thereby sandwiching the bus bar base between the case member and the cover member.

4. 4. The electrical junction box according to claim 3, wherein the spring-shaped portion is formed in a double-supported beam shape with a middle portion pressing against the bus bar base.

5. 4. The electrical junction box according to claim 3, wherein the spring-shaped portion is formed in a cantilever shape with a free end portion pressing against the bus bar base.

6. 6. The electrical connection box according to claim 1, wherein the bus bar terminal connection portion is physically and electrically connected to the intermediate terminal fitting by a spring force applied by the intermediate terminal fitting to a flat surface of the bus bar terminal connection portion.

Images