GB2621682A - Busbar mounting structure for electric junction box - Google Patents

Busbar mounting structure for electric junction box Download PDF

Info

Publication number
GB2621682A
GB2621682A GB2309342.0A GB202309342A GB2621682A GB 2621682 A GB2621682 A GB 2621682A GB 202309342 A GB202309342 A GB 202309342A GB 2621682 A GB2621682 A GB 2621682A
Authority
GB
United Kingdom
Prior art keywords
busbar
terminal
conductor
input
output terminal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
GB2309342.0A
Inventor
Takanokura Masato
Senoo Ryuu
Yamada Shinji
Toriyama Hirohito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yazaki Corp
Original Assignee
Yazaki Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yazaki Corp filed Critical Yazaki Corp
Publication of GB2621682A publication Critical patent/GB2621682A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/16—Distribution boxes; Connection or junction boxes structurally associated with support for line-connecting terminals within the box
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/20—Bases for supporting the fuse; Separate parts thereof
    • H01H85/203—Bases for supporting the fuse; Separate parts thereof for fuses with blade type terminals
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/05—Component parts thereof
    • H01H85/165—Casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/25—Safety arrangements preventing or inhibiting contact with live parts, including operation of isolation on removal of cover
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/081—Bases, casings or covers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/08—Distribution boxes; Connection or junction boxes
    • H02G3/14—Fastening of cover or lid to box
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/20—Bases for supporting the fuse; Separate parts thereof
    • H01H2085/2075—Junction box, having holders integrated with several other holders in a particular wiring layout
    • H01H2085/208—Junction box, having holders integrated with several other holders in a particular wiring layout specially adapted for vehicles

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Connection Or Junction Boxes (AREA)

Abstract

A busbar mounting structure for an electric junction box 1 including an electrically insulating housing body 5 in which a first terminal accommodating portion 53 receives a first input and output terminal 3 to be electrically connected to an electric component (fuse 2), and a protective cover 6 that covers the electric component and the first input and output terminal attachable to the housing body, and a busbar 8 with an outer peripheral face of a flat conductor covered with an insulating sheath 83, and an exposed portion at an end 84 of the busbar electrically connected to a conductor connection portion of the first input and output terminal; the busbar has a bent portion to narrow a gap between the bent busbar and the protective cover thus preventing access to the terminal. The protective cover may have sections which may be opened or closed, and which comprise a hinge. A second terminal accommodating potion 54 may be included which receives a second input and output terminal 4 connectable to an electric wire 91.

Description

BUSBAR MOUNTING STRUCTURE FOR ELECTRIC JUNCTION BOX
TECHNICAL FIELD
[0001] The present invention relates to a busbar mounting structure for an electric junction box
BACKGROUND ART
[0002] A fuse box for storing a fuse as an electric component is known as an electric junction box mounted on a vehicle as disclosed in, for example, JP2018-026251A. A fuse box of this type includes a box body (housing body) made of a resin and a cover (protective cover) made of a resin that covers an upper open portion of the box body, and is capable of accommodating a fuse.
[0003] The box body is provided with a fuse accommodating portion (electric component storage portion) capable of accommodating a fuse, and a busbar accommodating portion (terminal accommodating portion) capable of accommodating a first busbar and a second busbar (first input and output terminal and second input and output terminal) whose fuse mounting portions are electrically connected to two terminals of the fuse, respectively. An external member (external conductor) is electrically connected to external member mounting portions (conductor connection portions) of the first busbar and the second busbar.
The cover (protective cover) includes a first cover portion (cover body) that covers a closed side from a central portion of the open portion of the box body, a second cover portion that covers an insertion side (a side into which a connection end of the external member is inserted) from the central portion, and a thin coupling portion that connects the first cover portion and the second cover portion.
[0004] When the connection ends of the external members are respectively connected to the external member mounting portions of the first busbar and the second busbar, only the second cover portion can be rotated to open the upper portion of the box body on the insertion side. That is, when the second cover portion is closed after the external member is connected, fingers or the like do not touch the conductor connection portions of the first busbar and the second busbar or the connection ends of the external members.
[0005] Here, as the external member to be connected to the conductor connection portions of the first busbar and the second busbar, a busbar (flat routing member) in which an outer peripheral face of a strip-shaped flat conductor is covered with an insulating sheath, a terminal-attached electric wire in which a connection terminal is connected to an electric wire end, or the like is used according to a layout or a specification of a fuse box when mounted on a vehicle. Further, the connection end of the external member is generally screw-fastened to the conductor connection portions of the first busbar and the second busbar, but the height (wire diameter) of the terminal-attached electric wire in the fastening direction and the height of the screw fastening portion are larger than the height (plate thickness) of the busbar in the fastening direction.
[0006] The height of the cover (that is, the second cover portion) covering the conductor connection portions of the first busbar and the second busbar is set to correspond to the height of the terminal-attached electric wire in the fastening direction or the height of the screw fastening portion.
Therefore, in a case in which the connection end of the busbar is screw-fastened to the conductor connection portion of the first busbar or the second busbar, the gap between the busbar and the cover is widened, and fingers or the like can easily enter. Therefore, it is required to expand a range in which the connection end of the busbar is covered with the box body and the cover, and the box body and the cover have a problem in that the fuse box is increased in size.
SUMMARY OF INVENTION
[0007] The present invention provides a busbar mounting structure for an electric junction box that can prevent an increase in size of the electric junction box while reliably ensuring a finger touch prevention function of a busbar electrically connected to an electric component in the electric junction box [0008] An aspect of the present invention provides a busbar mounting structure for an electric junction box includes an electric junction box including an electrically insulating housing body in which a first terminal accommodating portion configured to accommodate a first input and output terminal to be electrically connected to an electric component is formed, and a protective cover that covers the electric component and the first input and output terminal and is to be attached to the housing body, and a busbar in which an outer peripheral face of a flat conductor is covered with an insulating sheath, and a conductor-exposed portion at an end of the busbar is electrically connected to a conductor connection portion of the first input and output terminal. The busbar is provided with a step portion to narrow a gap between the busbar and the protective cover.
[0009] The present invention has been briefly described above. Further, the details of the present invention can be further clarified by reading the embodiments described below (hereinafter referred to as "embodiments") with reference to the accompanying drawings.
BRIEF DESCRIPTION OF DRAWINGS
[0010] Fig. 1 is an exploded perspective view of an electric junction box including a busbar mounting structure for the electric junction box according to an embodiment of the present invention; Fig. 2 is a perspective view of a main part of a busbar shown in Fig. 1; Fig. 3 is a perspective view of the electric junction box shown in Fig. 1 in which an electric component and a protective cover are attached to a housing body; Fig. 4 is a perspective view showing a procedure of electrically connecting external conductors to a first terminal accommodating portion and a second terminal accommodating portion of the electric junction box shown in Fig. 3, respectively; Fig. 5 is a perspective view showing a state in which the external conductors are electrically connected to the first terminal accommodating portion and the second tenninal accommodating portion of the electric junction box, respectively; Fig. 6 is a longitudinal sectional view of the first terminal accommodating portion in the electric junction box shown in Fig. 5; Fig. 7 is a longitudinal sectional view of the second terminal accommodating portion in the electric junction box shown in Fig. 5; Fig. 8 is a perspective view of a main part of a busbar according to a reference
example;
Fig. 9 is a longitudinal sectional view of the first terminal accommodating portion in the electric junction box accommodating the busbar according to the reference example shown in Fig. 8; Fig. 10 is a perspective view of a main part of a busbar according to a modification; and Fig. 11 is a perspective view of a main part of a busbar according to another 30 modification.
DESCRIPTION OF EMBODIMENTS
[0011] Specific embodiments of the present invention will be described below with reference to the drawings.
Fig. 1 is an exploded perspective view of an electric junction box 1 according to an embodiment of the present invention. Fig. 2 is a perspective view of a main part of a busbar 8 shown in Fig. 1. Fig. 3 is a perspective view of the electric junction box 1 shown in Fig. 1 in which a fuse 2 and a protective cover 6 are attached to a housing body 5.
In the present specification, a front-rear direction, an up-down direction, and a left-right direction of the electric junction box 1 follow directions of arrows shown in Fig. 1. [0012] As shown in Figs. 1 to 3, the electric junction box 1 according to the present embodiment is, for example, a fuse box that is mounted on a vehicle and stores the fuse 2 that is an electric component. The fuse 2 is disposed upstream of an electric wiring from a battery to an electric device. As external conductors to be electrically connected to the terminals 22 and 23 of the fuse 2, a case in which a busbar (flat routing member) 8 and a terminal-attached electric wire 9 are used will be described as an example.
[0013] The electric junction box 1 includes the housing body 5 that is electrically insulating and is formed of an insulating material such as a synthetic resin, and the protective cover 6 The fuse 2 includes a cylindrical fuse body 21 extending in the left-right direction, and terminals (fuse terminals) 22 and 23 protruding from both ends of the fuse body 21 The terminals 22 and 23 each have a substantially quadrate plate shape, and through holes 22a and 23a through which bolts 25 are to be inserted are respectively provided in the centers of the terminals 22 and 23.
[0014] As shown in Fig 1, the housing body 5 includes an electric component storage portion 51 for storing the fuse 2, a first terminal accommodating portion 53 for accommodating a first input and output terminal 3 to be electrically connected to one terminal 22 of the fuse 2, a second terminal accommodating portion 54 for accommodating a second input and output terminal 4 to be electrically connected to the other terminal 23 of the fuse 2, and fixing brackets 52 to be fixed to a support member (not shown).
[0015] The electric component storage portion 51 is formed in a bottomed box shape that is open forward than a central portion in the longitudinal direction (a central portion in the left-right direction) of the housing body 5, and the fuse body 21 of the fuse 2 is accommodated therein. The first terminal accommodating portion 53 is formed on the left of the electric component storage portion 51 corresponding to one terminal 22 of the fuse 2, and the second terminal accommodating portion 54 is formed on the right of the electric component storage portion 51 corresponding to the other terminal 23 of the fuse 2.
[0016] A front face of the first terminal accommodating portion 53 is provided with an insert nut 55 for fixing the fuse 2 together with the first input and output terminal 3.
A front face of the second terminal accommodating portion 54 is provided with an insert nut 55 for fixing the fuse 2 together with the second input and output terminal 4.
[0017] The first input and output terminal 3 is a conductive metal plate that is formed to be bent in an L shape and includes a terminal connection portion 311 to be electrically connected to the terminal 22 of the fuse 2 protruding leftward from the electric component storage portion 51 and a conductor connection portion 312 to be electrically connected to the flat conductor 81 of the busbar 8 The terminal connection portion 311 is provided with an oblong through hole 33 through which the bolt 25 is to be inserted. The conductor connection portion 312 is provided with a stud bolt 32 protruding upward.
[0018] The second input and output terminal 4 is a conductive metal plate that is formed to be bent in an L shape and includes a terminal connection portion 411 to be electrically connected to the terminal 23 of the fuse 2 protruding rightward from the electric component storage portion Si and a conductor connection portion 412 to be electrically connected to a connection terminal 93 of the terminal-attached electric wire 9. The terminal connection portion 411 is provided with an oblong through hole 43 through which the bolt 25 is to be inserted. The conductor connection portion 412 is provided with a stud bolt 42 protruding upward [0019] The fixing brackets 52 are portions further extending in the longitudinal direction from both end portions of the housing body 5 in the longitudinal direction (left-right direction). In the fixing bracket 52, an insertion hole for fixing the electric junction box 1 using a fixture such as a bolt is formed, and a metal collar is attached.
[0020] The protective cover 6 is an insulating cover to be attached to the housing body 5 from above so as to cover the terminals 22 and 23 of the fuse 2, the first input and output terminal 3, and the second input and output terminal 4.
The protective cover 6 includes a cover body 60 integrally formed with an upper wall portion 61 and front wall portions 63 and 63, and a pair of covers 7A and 7B openably and closably provided on the cover body 60.
[0021] The cover body 60 includes an upper wall portion 61 having an H shape in plan view and constituting opening portions 66 above the first terminal accommodating portion 53 and the second terminal accommodating portion 54 of the housing body 5 respectively, and a pair of front wall portions 63 and 63 extending downward from front edges of the upper wall portion 61 and covering front sides of the first terminal accommodating portion 53 and the second terminal accommodating portion 54 of the housing body 5.
[0022] Further, the cover 7A as a first cover is openably and closably provided in the opening portion 66 of the upper wall portion 61 corresponding to the first terminal accommodating portion 53 so as to cover the conductor connection portion 312 of the first input and output terminal 3. The cover 7B as a second cover is openably and closably provided in the opening portion 66 of the upper wall portion 61 corresponding to the second terminal accommodating portion 54 so as to cover the conductor connection portion 412 of the second input and output terminal 4.
[0023] In the present embodiment, the cover 7B as the second cover is formed in the same shape as the cover 7A as the first cover. The covers 7A and 7B are each rotatably mounted on the cover body 60 by a pair of pivoting shafts 73 provided at one end portion of a top wall 71 in the longitudinal direction being pivotally supported by a pair of bearings 65 provided at the opening portion 66 of the upper wall portion 61.
Both side faces of the top wall 71 along the longitudinal direction are each provided with a locking protrusion 75 that is a locked portion, and the locking protrusions 75 are locked to a pair of locking portions 67 provided on each of the opening portions 66 of the upper wall portion 61, so that the covers 7A and 7B can hold the opening portions 66 in a closed state.
[0024] As shown in Fig. 3, regarding the protective cover 6, the upper sides of the first terminal accommodating portion 53 and the second terminal accommodating portion 54 of the housing body 5 can be opened by pivoting only the covers 7A and 7B while maintaining the state in which the cover body 60 is mounted on the housing body 5. Accordingly, after the fuse 2, the first input and output terminal 3, and the second input and output terminal 4 are mounted on the housing body 5, the busbar 8 and the terminal-attached electric wire 9, which are external conductors, can be mounted on the housing body 5 without completely removing the protective cover 6.
[0025] In the busbar 8, an outer peripheral face of a strip-shaped flat conductor 81 is covered with an insulating sheath 83, and a conductor-exposed portion 84 from which the flat conductor 81 is exposed by removing the insulating sheath 83 is provided at an end of the busbar 8. The busbar 8 according to the present embodiment is formed in a bending manner such that a lead-out part 87 led out from the first terminal accommodating portion 53 extends rearward of the housing body 5.
[0026] As shown in Fig. 2, a through hole 82 through which the stud bolt 32 of the first input and output terminal 3 is to be inserted is formed in the conductor-exposed portion 84 of the busbar 8. The through hole 82 is formed in an oblong shape elongated in an extending direction of the conductor-exposed portion 84.
Further, in a vicinity of the conductor-exposed portion 84 at the end of the busbar 8, a step portion 85 is formed to be bent so as to narrow a gap between the busbar 8 and the protective cover 6 to prevent a finger from entering the first terminal accommodating portion 53.
[0027] The step portion 85 according to the present embodiment is bent into a crank shape in a cross section so that the vicinity of the conductor-exposed portion 84 at the end of the busbar 8 is positioned above the conductor-exposed portion 84 in a plate thickness direction (on a protective cover 6 side).
That is, the step portion 85 obtained by bending the vicinity of the conductor-exposed portion 84 toward the protective cover 6 side is provided at the end of the busbar 8, so that the gap between the busbar 8 and the protective cover 6 in which a finger or a tool such as a wrench is inserted is divided in the up-down direction. Accordingly, the gap space of each of the upper and lower portions becomes a gap smaller than the size of the finger, so that a finger touch prevention structure in which the finger does not enter is provided.
[0028] In the terminal-attached electric wire 9, a connection terminal 93 is crimped and connected to a core wire 92 exposed by peeling an insulating sheath 96 at an end of a covered electric wire 91. A through hole 94 through which the stud bolt 42 of the second input and output terminal 4 is to be inserted is formed in the connection terminal 93. A crimping portion of the connection terminal 93 is covered and electrically insulated by an insulating member 95 such as an insulating tape.
[0029] Next, an assembly procedure of the electric junction box 1 will be described.
First, the first input and output terminal 3 and the second input and output terminal 4 are disposed in the first terminal accommodating portion 53 and the second tenninal accommodating portion 54 of the housing body 5, respectively. Then, in the first input and output terminal 3, the conductor connection portion 312 is placed on an upper face of the first terminal accommodating portion 53, and the terminal connection portion 311 abuts against the insert nut 55 provided on the front face of the first terminal accommodating portion 53. In the second input and output terminal 4, the conductor connection portion 412 is placed on an upper face of the second terminal accommodating portion 54, and the terminal connection portion 411 abuts against the insert nut 55 provided on the front face of the second terminal accommodating portion 54.
[0030] Next, the fuse body 21 of the fuse 2 is accommodated in the electric component storage portion 51. Then, the terminal 22 of the fuse 2 protruding leftward from the electric component storage portion 51 is overlapped with the terminal connection portion 311 of the first input and output terminal 3, and the terminal 23 of the fuse 2 protruding rightward from the electric component storage portion 51 is overlapped with the terminal connection portion 411 of the second input and output terminal 4.
[0031] Further, the bolt 25 inserted through the through hole 22a of the terminal 22 and the through hole 33 of the first input and output terminal 3 is screwed into the insert nut 55, and the bolt 25 inserted through the through hole 23a of the terminal 23 and the through hole 43 of the second input and output terminal 4 is screwed into the insert nut 55. Then, the fuse 2, the first input and output terminal 3, and the second input and output terminal 4 are fastened and fixed to the housing body 5.
Then, as shown in Fig. 3, the protective cover 6 obtained by openably and closably mounting the covers 7A and 7B on the cover body 60 is attached to the housing body 5 from above, and the assembly of the electric junction box 1 is completed.
[0032] Next, a connection procedure of the busbar 8 and the terminal-attached electric wire 9 respectively connected to the first input and output terminal 3 and the second input and output terminal 4 of the electric junction box 1 will be described with reference to Figs. 3 to 7.
First, as shown in Fig. 3, the covers 7A and 7B of the protective cover 6 in the electric junction box 1 are opened, and the upper sides of the first terminal accommodating portion 53 and the second terminal accommodating portion 54 in the housing body 5 are opened.
[0033] Then, the end of the busbar 8 is placed on the first terminal accommodating portion 53, and as shown in Fig. 4, the stud bolt 32 of the first input and output terminal 3 is inserted into the through hole 82 of the conductor-exposed portion 84. At this time, the through hole 82 is formed in an oblong shape elongated in the extending direction of the conductor-exposed portion 84, and can absorb a dimensional tolerance of a mounting position of the busbar 8 relative to the stud bolt 32, and can allow the stud bolt 32 to be smoothly inserted.
Thereafter, a nut 97 is screwed onto the stud bolt 32 to fix the end of the busbar 8 to the first terminal accommodating portion 53. At this time, the vicinity of the conductor-exposed portion 84 where the step portion 85 is formed to be bent and formed can be positioned above the conductor-exposed portion 84 in the plate thickness direction (on the protective cover 6 side).
[0034] In addition, the connection terminal 93 of the terminal-attached electric wire 9 is placed on the second terminal accommodating portion 54, and as shown in Fig. 4, the stud bolt 42 of the second input and output terminal 4 is inserted into the through hole 94 Thereafter, the nut 97 is screwed onto the stud bolt 42 to fix the connection terminal 93 of the terminal-attached electric wire 9 to the second terminal accommodating portion 54. [0035] Then, the covers 7A and 7B of the protective cover 6 are pivoted in the closing direction, and the locking protrusions 75 are locked to the locking portions 67, so that the upper sides of the first terminal accommodating portion 53 and the second terminal accommodating portion 54 of the housing body 5 are closed as shown in Fig. 5.
Accordingly, the work of respectively connecting the busbar 8 and the terminal-attached electric wire 9 to the first input and output terminal 3 and the second input and output terminal 4 of the electric junction box 1 is completed.
[0036] Next, the effect of the busbar mounting structure for the electric junction box according to the above embodiment will be described.
In the electric junction box 1 according to the present embodiment, as shown in Fig 6, the first input and output terminal 3 (the conductor connection portion 312 and the stud bolt 32) and the nut 97 accommodated in the first terminal accommodating portion 53 of the housing body 5 are covered with the cover 7A of the protective cover 6 to prevent contact with fingers or the like.
[0037] Here, a height of a screw fastening portion of the stud bolt 32 and the nut 97 is larger than a height (plate thickness) of the busbar 8 in a fastening direction. Therefore, a height of the cover 7A of the protective cover 6 for covering the first input and output terminal 3 is set corresponding to the height of the screw fastening portion. Therefore, if the step portion 85 of the busbar 8 is not bent, and the vicinity of the conductor-exposed portion 84 at the end of the busbar 8 is positioned on the same plane as the conductor-exposed portion 84, a gap between the conductor-exposed portion 84 of the busbar 8 screw-fastened to the conductor connection portion 312 of the first input and output terminal 3 and the cover 7A of the protective cover 6 is widened, and a finger itself or a tool such as a wrench held in a hand is easily inserted.
[0038] However, in the busbar mounting structure for the electric junction box according to the present embodiment, the step portion 85 provided at the end of the busbar 8 divides the gap between the busbar 8 and the protective cover 6 in the up-down direction, so that the space between the upper and lower portions is smaller than the size of the finger.
Therefore, the gap between the busbar 8 and the cover 7A of the protective cover 6 is further narrowed by the step portion 85, so that even when a test finger 100 assumed to be a finger is inserted into the gap between the busbar 8 and the cover 7A of the protective cover 6 from the outside of the first terminal accommodating portion 53 as shown in Fig. 6, the test finger 100 does not reach the first input and output terminal 3 (the conductor connection portion 312 and the stud bolt 32), the nut 97, and the conductor-exposed portion 84 of the busbar 8.
[0039] In the electric junction box 1 according to the present embodiment, as shown in Fig. 7, the second input and output terminal 4 (the conductor connection portion 412 and the stud bolt 42) and the nut 97 accommodated in the second terminal accommodating portion 54 of the housing body 5 are covered with the cover 7B of the protective cover 6 to prevent contact with fingers or the like.
[0040] Here, a height of a screw fastening portion of the stud bolt 42 and the nut 97 is substantially the same as a height of the crimping portion of the connection terminal 93 of the terminal-attached electric wire 9. Therefore, a gap between the crimping portion of the connection terminal 93 screw-fastened to the conductor connection portion 412 of the second input and output terminal 4 and the cover 7B of the protective cover 6 is narrowed, and a finger itself or a tool such as a wrench held in a hand hardly enters.
[0041] Therefore, as shown in Fig. 7, even when the test finger 100 assumed to be a finger is inserted into the gap between the terminal-attached electric wire 9 and the protective cover 6 from the outside of the second terminal accommodating portion 54, the test finger 100 does not reach the second input and output terminal 4 (the conductor connection portion 412 and the stud bolt 42), the nut 97, and the connection terminal 93.
[0042] Fig. 8 is a perspective view of a main part of a busbar 508 according to a reference example. Fig. 9k a longitudinal sectional view of a first terminal accommodating portion 553 provided in an electric junction box 501 accommodating the busbar 508 according to the reference example shown in Fig. 8. The same constituent members as those of the electric junction box 1 according to the above embodiment are denoted by the same reference numerals, and a detailed description thereof is omitted.
[0043] As shown in Fig. 8, in the busbar 508 according to the reference example, the step portion 85 is not formed to be bent, and the vicinity of the conductor-exposed portion 84 at the end of the busbar 8 is positioned on the same plane as the conductor-exposed portion 84.
II
Therefore, in the electric junction box 501 according to the reference example, as shown in Fig. 9, the gap between an end of the busbar 508 screw-fastened to the conductor connection portion 312 of the first input and output terminal 3 and the cover 7A of the protective cover 6 is widened, and the gap is not narrowed by the step portion 85 as described in the above embodiment. Therefore, when the test finger 100 assumed to be a finger is inserted into the gap between the busbar 508 and the cover 7A of the protective cover 6 from the outside of the first terminal accommodating portion 553, the test finger 100 may reach the first input and output terminal 3 (the conductor connection portion 312 and the stud bolt 32), the nut 97, and the conductor-exposed portion 84 of the busbar 508.
[0044] Accordingly, according to the busbar mounting structure for the electric junction box 1 according to the present embodiment, it is possible to reliably ensure the finger touch prevention function of the busbar 8 electrically connected to the fuse 2 in the electric junction box 1.
In addition, it is not necessary to expand the range in which the conductor-exposed portion 84 (end) of the busbar 8 is covered with the housing body 5 and the protective cover 6, and an increase in size of the electric junction box I can be prevented.
[0045] The cover 7B of the protective cover 6 according to the present embodiment can be formed in the same shape as the cover 7A for covering the conductor connection portion 312 of the first input and output terminal 3 to which the busbar 8 is connected even in a case in which the terminal-attached electric wire 9 is used as the external conductor connected to the conductor connection portion 412 of the second input and output terminal 4 Therefore, the manufacturing cost can be reduced by sharing the parts.
[0046] Figs. 10 and 11 are perspective views of main parts of a busbar 8A according to a modification and a busbar 8B according to another modification. The same constituent members as those of the busbar 8 according to the above embodiment are denoted by the same reference numerals, and a detailed description thereof is omitted.
As shown in Fig. 10, in a vicinity of the conductor-exposed portion 84 at an end of the busbar 8A according to the modification, a step portion 85A is formed to be bent so as to narrow a gap between the busbar 8A and the protective cover 6 to prevent the finger from entering the first terminal accommodating portion 53.
[0047] The step portion 85A according to the modification is bent into a stepped shape in a cross section such that the vicinity of the conductor-exposed portion 84 at the end of the busbar 8A is positioned above the conductor-exposed portion 84 in the plate thickness direction (on the protective cover 6 side).
That is, the step portion 85A obtained by bending the vicinity of the conductor-exposed portion 84 toward the protective cover 6 side is provided at the end of the busbar 8A, so that the gap between the busbar 8A and the cover 7A of the protective cover 6 in which a finger or a tool such as a wrench is inserted is divided in the up-down direction. Accordingly, the gap space of each of the upper and lower portions becomes a gap smaller than the size of the finger, so that a finger touch prevention structure in which the finger does not enter is provided.
[0048] As shown in Fig. 11, in a vicinity of the conductor-exposed portion 84 at an end of the busbar 8B according to another modification, a step portion 85B is formed to be bent so as 10 to narrow a gap between the busbar 8B and the protective cover 6 to prevent the finger from entering the first terminal accommodating portion 53.
The step portion 85B according to another modification is bent in an Q shape in a cross section such that a bent portion faces the protective cover 6 side The step portion 85B protrudes into the gap between the busbar 8B and the cover 7A of the protective cover 6.
[0049] That is, the step portion 85B obtained by bending the vicinity of the conductor-exposed portion 84 toward the protective cover 6 side is provided at the end of the busbar 8B, so that the gap between the busbar 8B and the cover 7A of the protective cover 6 is closed by the step portion 85B. Accordingly, the step portion 85B forms a finger touch prevention structure in which the finger does not enter by preventing insertion of a finger itself or a tool such as a wrench.
[0050] Accordingly, according to the busbar mounting structure for the electric junction box 1 including the busbar 8A or the busbar 8B, it is possible to reliably ensure the finger touch prevention function of the busbar 8A or the busbar 8B electrically connected to the fuse 2 in the electric junction box 1.
In addition, it is not necessary to expand the range in which the conductor-exposed portion 84 (end) of the busbar 8A or the busbar 8B is covered with the housing body 5 arid the protective cover 6, and an increase in size of the electric junction box 1 can be prevented. [0051] The present invention is not limited to the above-described embodiment, arid can be appropriately modified, improved, or the like. In addition, the material, shape, size, number, arrangement position, and the like of each component in the above-described embodiment are optional and are not limited as long as the present invention can be achieved.
The above embodiment describes an example in which the busbar 8 (8A, 8B) is electrically connected to the first input and output terminal 3 accommodated in the electric junction box 1, and the terminal-attached electric wire 9 is electrically connected to the second input and output terminal 4, and the busbar mounting structure for the electric junction box according to the present invention can also be applied to a case in which the busbar 8 (8A, 8B) is electrically connected to each of the first input and output terminal 3 and the second input and output terminal 4.
Further, a bending shape of the step portion in the busbar according to the present invention is not limited to the shape of the step portions 85, 85A, and 85B according to the above embodiment, and it is needless to say that various bending shapes protruding toward the protective cover side can be adopted based on the gist of the present invention.
[0052] According to a first aspect of the present invention, a busbar mounting structure for an electric junction box includes an electric junction box (1) including an electrically insulating housing body (5) in which a first terminal accommodating portion (53) configured to accommodate a first input and output terminal (3) to be electrically connected to an electric component (2) is formed, and a protective cover (6) that covers the electric component (2) and the first input and output terminal (3) and is to be attached to the housing body (5), and a busbar (8, 8A, 8B) in which an outer peripheral face of a flat conductor (81) is covered with an insulating sheath (83), and a conductor-exposed portion (84) at an end of the busbar (8, 8A, 8B) is electrically connected to a conductor connection portion (312) of the first input and output terminal (3). The busbar (8, 8A, 8B) is provided with a step portion (85, 85A, 85B) to narrow a gap between the busbar (8, 8A, 8B) and the protective cover (6).
[0053] According to a second aspect of the present invention, the step portion (85, 85A, 85B) is configured to prevent a finger from entering the first terminal accommodating portion (53).
[0054] According to the busbar mounting structure for the electric junction box having the configuration of the first and second aspects, the first input and output terminal (3) accommodated in the first terminal accommodating portion (53) of the housing body (5) is covered with the protective cover (6) to prevent contact with a finger or the like.
Here, the end of the busbar (8), which is formed by the strip-shaped flat conductor (81), is generally screw-fastened to the conductor connection portion (312) of the first input and output terminal (3), and the height of a screw fastening portion is larger than the height (plate thickness) of the busbar (8) in the fastening direction. Therefore, the height of the protective cover (6) for covering the first input and output terminal (3) is set corresponding to the height of the screw fastening portion Therefore, in the case in which the end of the busbar (8) is screw-fastened to the conductor connection portion (312) of the first input and output terminal (3), the gap between the busbar (8) and the protective cover (6) is widened, and a finger itself or a tool such as a wrench held in a hand can easily enter.
However, according to the busbar mounting structure for the electric junction box having the configuration of the first aspect, the step portion (85, 85A, 85B) formed in the busbar (8, 8A, 8B) narrows the gap between the busbar (8, 8A, 8B) and the protective cover (6). Therefore, a finger itself or a tool such as a wrench cannot touch the first input and output terminal (3) or the conductor-exposed portion (84) of the busbar (8, 8A, 8B).
Accordingly, the finger touch prevention function of the busbar (8, 8A, 8B) electrically connected to the electric component (fuse 2) in the electric junction box (1) can be reliably ensured In addition, it is not necessary to expand the range in which the conductor-exposed portion (84) (end) of the busbar (8, 8A, 8B) is covered with the housing body (5) and the protective cover (6), and an increase in size of the electric junction box (1) can be prevented.
[0055] According to a third aspect of the present invention, the protective cover (6) includes a cover body (60) to be attached to the housing body (5), and a first cover (7A) openably and closably provided on the cover body (60) to cover the conductor connection portion (312) of the first input and output terminal (3) [0056] According to the busbar mounting structure for the electric junction box having the configuration of the third aspect, regarding the protective cover (6), the upper side of the first terminal accommodating portion (53) of the housing body (5) can be opened by pivoting only the first cover (the cover 7A) while maintaining the state in which the cover body (60) is mounted on the housing body (5). Accordingly, after the electric component (fuse 2) and the first input and output terminal (3) are mounted on the housing body (5), the busbar (8, 8A, 8B) as the external conductor can be mounted on the housing body (5) without completely removing the protective cover (6).
[0057] According to a fourth aspect of the present invention, the housing body (5) includes a second terminal accommodating portion (54) configured to accommodate a second input and output terminal (4) to be electrically connected to a terminal (23) of the electric component (2). A connection terminal (93) of a terminal-attached electric wire (9) is electrically connected to a conductor connection portion (412) of the second input and output terminal (4). The protective cover (6) includes a second cover (7B) that is formed in the same shape as the first cover (7A) and is openably and closably provided on the cover body (60) to cover the conductor connection portion (412) of the second input and output terminal (4).
[0058] According to the busbar mounting structure for the electric junction box having the configuration of the fourth aspect, regarding the protective cover (6), the upper side of the second terminal accommodating portion (54) of the housing body (5) can be opened by pivoting only the second cover (cover 7B) while maintaining the state in which the cover body (60) is mounted on the housing body (5) Accordingly, after the second input and output terminal (4) is mounted on the housing body (5), the connection terminal (93) of the terminal-attached electric wire (9) as the external conductor can be mounted on the housing body (5) without completely removing the protective cover (6).
Further, the second cover (cover 7B) can be formed in the same shape as the first cover (cover 7A) for covering the conductor connection portion (312) of the first input and output terminal (3) to which the busbar (8) is connected even when the terminal-attached electric wire (9) is used as the external conductor connected to the conductor connection portion (412) of the second input and output terminal (4). Therefore, the manufacturing cost can be reduced by sharing the parts.
[0059] According to a fifth aspect of the present invention, the step portion (85) is bent into a crank shape in a cross section so that a vicinity of the conductor-exposed portion (84) at the end of the busbar (8) is positioned above the conductor-exposed portion (84) in a plate thickness direction.
[0060] According to the busbar mounting structure for the electric junction box having the configuration of the fifth aspect, the step portion (85) can be easily formed by bending the end of the busbar (8) into a crank shape in a cross section.
[0061] According to a sixth aspect of the present invention, the step portion (85A) is bent into a stepped shape in a cross section so that a vicinity of the conductor-exposed portion (84) at the end of the busbar (8A) is positioned above the conductor-exposed portion (84) in the plate thickness direction.
[0062] According to the busbar mounting structure for the electric junction box having the configuration of the sixth aspect, the step portion (85A) can be easily formed by bending the end of the busbar (8A) into a stepped shape in a cross section.
[0063] According to a seventh aspect of the present invention, the step portion (85B) is bent into an Q shape in a cross section in a vicinity of the conductor-exposed portion (84) at the end of the busbar (8B) such that a bending portion thereof faces the protective cover (6) side.
[0064] According to the busbar mounting structure for the electric junction box having the configuration of the seventh, the step portion (85B) can be easily formed by bending the end of the busbar (8B) into an 0 shape in a cross section such that the bending portion faces the protective cover (6) side.

Claims (7)

  1. What is claimed is: 1. A busbar mounting structure for an electric junction box comprising: an electric junction box including an electrically insulating housing body in which a first terminal accommodating portion configured to accommodate a first input and output terminal to be electrically connected to an electric component is formed, and a protective cover that covers the electric component and the first input and output terminal and is to be attached to the housing body; and a busbar in which an outer peripheral face of a flat conductor is covered with an insulating sheath, and a conductor-exposed portion at an end of the busbar is electrically connected to a conductor connection portion of the first input and output terminal, wherein the busbar is provided with a step portion to narrow a gap between the busbar arid the protective cover.
  2. 2. The busbar mounting structure for an electric junction box according to claim 1, wherein the step portion is configured to prevent a finger of a person from entering the first terminal accommodating portion
  3. 3. The busbar mounting structure for an electric junction box according to claim 1, wherein the protective cover includes a cover body to be attached to the housing body, and a first cover openably and closably provided on the cover body to cover the conductor connection portion of the first input and output terminal
  4. 4. The busbar mounting structure for an electric junction box according to claim 3, wherein the housing body includes a second terminal accommodating portion configured to accommodate a second input and output terminal to be electrically connected to a terminal of the electric component, wherein a connection terminal of a terminal-attached electric wire is electrically connected to a conductor connection portion of the second input and output terminal, and wherein the protective cover includes a second cover that is formed in a corresponding shape as the first cover and is openably and closably provided on the cover body to cover the conductor connection portion of the second input and output terminal
  5. 5. The busbar mounting structure for an electric junction box according to any one of claims 1 to 4, wherein the step portion is bent into a crank shape in a cross section so that a part of the step portion in a vicinity of the conductor-exposed portion is positioned above the conductor-exposed portion in a plate thickness direction
  6. 6. The busbar mounting structure for an electric junction box according to any one of claims Ito 4, wherein the step portion is bent into a stepped shape in a cross section so that a part of the step portion in a vicinity of the conductor-exposed portion is positioned above the conductor-exposed portion in the plate thickness direction.
  7. 7. The busbar mounting structure for an electric junction box according to any one of claims 1 to 4, wherein the step portion is bent into an Q shape in a cross section so that a part of the step portion in a vicinity of the conductor-exposed portion faces the protective cover side.
GB2309342.0A 2022-07-11 2023-06-21 Busbar mounting structure for electric junction box Pending GB2621682A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2022111184A JP2024009566A (en) 2022-07-11 2022-07-11 Bus bar mounting structure for electric connection box

Publications (1)

Publication Number Publication Date
GB2621682A true GB2621682A (en) 2024-02-21

Family

ID=89386976

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2309342.0A Pending GB2621682A (en) 2022-07-11 2023-06-21 Busbar mounting structure for electric junction box

Country Status (4)

Country Link
JP (1) JP2024009566A (en)
CN (1) CN117394237A (en)
DE (1) DE102023116013A1 (en)
GB (1) GB2621682A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6030257A (en) * 1997-03-11 2000-02-29 Yazaki Corporation Fuse holder
WO2022264867A1 (en) * 2021-06-16 2022-12-22 株式会社オートネットワーク技術研究所 Electrical junction box
CN116365310A (en) * 2021-12-27 2023-06-30 矢崎总业株式会社 Wiring structure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6581950B2 (en) 2016-08-09 2019-09-25 古河電気工業株式会社 Fuse box

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6030257A (en) * 1997-03-11 2000-02-29 Yazaki Corporation Fuse holder
WO2022264867A1 (en) * 2021-06-16 2022-12-22 株式会社オートネットワーク技術研究所 Electrical junction box
CN116365310A (en) * 2021-12-27 2023-06-30 矢崎总业株式会社 Wiring structure

Also Published As

Publication number Publication date
DE102023116013A1 (en) 2024-01-11
CN117394237A (en) 2024-01-12
JP2024009566A (en) 2024-01-23

Similar Documents

Publication Publication Date Title
CN109314375B (en) Electric connection box
US8098115B2 (en) Noise eliminating wire harness
US7470151B2 (en) Connecting structure of electric wire and electronic-component incorporating unit
US7442099B2 (en) Metal terminal and electric distribution box provided with the same
US6547572B1 (en) Integrated and flexible power distribution assembly
US10770876B2 (en) Electrical connection box and ground connection structure thereof
US10325748B2 (en) Electrical connection box
US20170305370A1 (en) Electrical junction box
US5529506A (en) Terminal for shielding connectors and shielding connector
JP4097387B2 (en) Junction box
US20190319377A1 (en) Electrical junction box
GB2621682A (en) Busbar mounting structure for electric junction box
JP3622897B2 (en) Battery terminal connector
US4613192A (en) Power cord strain relief
KR100632301B1 (en) Battery terminal structure for vehicle
JPH11301379A (en) Ground wire connecting structure
JP6806608B2 (en) Branch structure and branch box
EP4059780B1 (en) Electrical connection box
JP2024009565A (en) Bus bar mounting structure for electric connection box
US10342145B2 (en) Substrate holding structure
JP2896739B2 (en) Shield terminal assembling method and its assembling structure
JP2023083711A (en) Terminal strip
JP2023019479A (en) charging connector
CN115693269A (en) Charging connector
JP2023001727A (en) Electric connection box