JP4969967B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electric junction box attached to a vehicle such as an automobile, and in particular, a cassette type electrical component through which a large current flows, such as a cassette type relay block, a fuse block, etc., fitted into a frame portion of a junction box body. The present invention relates to an electrical connection structure between mounting blocks.

  In an electrical junction box having a structure in which a cassette-type electrical component mounting block is fitted into a frame portion of the junction box body, a vehicle power supply unit including a battery and a generator provided outside the electrical junction box is connected via a thick wire. A first electrical component mounting block that is electrically connected and positioned upstream of the current path from the vehicle power supply unit, and a second electrical component mounting that is positioned downstream of the current path from the first electrical component mounting block An electrical connection structure is used in which the block is electrically connected with a thick wire.

  The thick wire connecting the first electric component mounting block and the second electric component mounting block has terminals electrically connected to both ends of the conductor by caulking or the like. One of the terminals is fixed to the terminal portion of the first electric component mounting block by bolting or the like, and the other is fixed to the terminal portion of the second electric component mounting block by bolting or the like, so that both electric component mounting blocks are electrically connected. Connected.

  The first electrical component mounting block in which current first flows from the vehicle power supply side is generally a fuse block containing a fuse (see, for example, Patent Document 1). Also, as an example of the second electric component mounting block, a fuse block containing a fuse (not only a fuse but also a relay depending on the object) can be cited. As the thick electric wire connecting the first electric component mounting block and the second electric component mounting block, those of 3 to 10 sq are used. Here, sq is a unit representing the cross-sectional area of the conducting wire in square millimeters.

  However, an electrical junction box in which the first electrical component mounting block and the second electrical component mounting block are electrically connected using such a thick wire has a high manufacturing cost and a large size. End up. Specifically, because thick electric wires are difficult to bend, an appropriate height is required for the electrical connection box, and generally, a wire protection fuse is required for the design of the electric wires. As a result, the cost is increased by the amount of the fuse, and the workability is poor because the terminals at both ends of the thick wire must be electrically connected and fixed respectively. It is done. In addition, in the electrical connection between the electrical component mounting blocks using thick wires with terminals connected to both ends of the conductor, the contact resistance is large (that is, the direct current resistance is large). Need to be improved.

  FIG. 10 is a circuit diagram showing an example in which the first electrical component mounting block 120 and the second electrical component mounting block 130 are electrically connected by the thick wire 140. The first electrical component mounting block 120 is connected to a battery (BATT) and an alternator (ALT), and the second electrical component mounting block 130 is connected to the downstream side of the current supply path. Is provided with a fuse 121 for protecting the thick wire 140.

  By the way, there are a right-hand drive type and a left-hand drive type in automobiles, and the configuration of the above-described electric connection structure is also changed inside the electric connection box in accordance with this specification (for example, patent document) 2). For this reason, it is necessary to share the components so that the vehicle on which the electrical junction box is mounted can be used with either a right-hand drive specification or a left-hand drive specification. Needless to say, it is preferable for downing. Therefore, it is necessary to consider the sharing of components while improving the electrical connection structure described above.

JP 2001-57144 A JP-A-8-336222

  This invention is made | formed in view of the situation mentioned above, The objective is to provide the electrical junction box by which productivity improvement, size reduction, and cost reduction were achieved. Furthermore, another object of the present invention is to provide an electrical junction box in which components are shared.

In order to achieve the above-mentioned object, the electrical junction box according to the present invention is characterized by the following (1) to (3).
(1) Two electrical component mounting blocks are fitted into the junction box body, and the space between these electrical component mounting blocks is outside the one electrical component mounting block of the bus bar arranged in one electrical component mounting block. the protruding end portion is electrically connected by direct connection to one of the other electrical component attachment block two arranged symmetrically on the terminal, moreover, the bus bar, said one of the electrical component mounting Having a terminal part that is in direct contact with and electrically connected to the terminal of the electrical component mounted on the block.
(2) In the electrical junction box configured as described in (1) above,
One end portion of the bus bar protrudes in a vertical posture from a substantially center in the width direction of one end surface in the longitudinal direction of the one electric component mounting block, and the one end portion of the bus bar has a vertical folding line interposed therebetween. A rectangular intermediate plate portion, and a connecting plate portion having a bolt through hole connected to the intermediate plate portion via a horizontal fold line, and one end portion of the bus bar is the vertical fold line And the horizontal fold line are bent at substantially right angles, and the connecting plate portion is fastened to a terminal disposed on the other electric component mounting block by a bolt passed through the bolt through hole. is being done.
(3) In the electrical junction box configured as described in (2) above,
Engagement engaging the longitudinal end surface of said Sutaddoboru bets is provided through the other of said terminal electrical components arranged symmetrically on the mounting block, said one of the electrical component mounting block for connection box body The one end surface of the one electrical component mounting block in the longitudinal direction is symmetrical to the engagement portion with the one end portion of the bus bar protruding from the substantially center in the width direction of the one end surface. An engaged portion to be engaged is provided.

According to the electrical junction box having the configuration of (1), since the two electrical component mounting blocks are electrically connected directly by the bus bar without using the thick electrical wire as in the conventional case, the thick electrical wire is used. As compared with the case where the blocks are electrically connected, the workability can be improved, the cost can be reduced, and the space can be saved. Moreover, when connecting between electrical component mounting blocks with a thick wire, it was necessary to connect two terminals at both ends of the thick wire to the mating side, but only one connection at one end of the bus bar is sufficient. As a result, the contact resistance can be reduced (that is, the direct current resistance can be reduced). In addition, when connecting electrical component mounting blocks with thick electric wires that are difficult to bend, the electrical connection box was required to have a certain height, but this point can also be eliminated, and the height of the electrical connection box can be reduced. Can also be achieved. Furthermore, by eliminating the thick wire, it is possible to eliminate the fuse required for the design of the wire (the fuse may not be provided for the bus bar).
According to the electrical junction box having the configuration of (2) above, by setting the folding direction at the two folding lines such as the vertical folding line and the horizontal folding line at one end of the bus bar to be opposite, The direction of the part and the connecting plate part can be set 180 degrees reverse. Therefore, it is possible to produce an electrical junction box for the right-hand drive vehicle and an electrical junction box for the left-hand drive vehicle simply by changing the bending direction of one end of the bus bar having the same cut shape.
According to the electrical junction box having the configuration of (3) above, terminals and stud bolts are provided symmetrically on the other electrical component mounting block, an engagement portion is provided on the junction box body, and one electrical component is provided. Since the engaged block is provided symmetrically on the mounting block, the right-hand drive car specification electrical connection box and the left-hand drive car specification electrical connection box can be shared by appropriately selecting the terminal that connects one end of the bus bar. It is possible to assemble using these parts, and the cost can be reduced.

  ADVANTAGE OF THE INVENTION According to this invention, the electrical junction box by which productivity improvement, size reduction, and cost reduction were achieved can be provided. Furthermore, according to the present invention, it is possible to provide an electrical junction box in which components are shared.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading through the best mode for carrying out the invention described below with reference to the accompanying drawings.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the drawings. In the following description, “R” is added to the reference symbol of the component of the right-hand drive vehicle specification, and “L” is added to the reference symbol of the component of the left-hand drive vehicle specification.

<First Embodiment>
FIG. 1 is a plan view showing a schematic internal configuration of an electric junction box of a right-hand drive vehicle specification which is a first embodiment of the present invention, and FIG. 2 is a first electric component mounting block arranged in the electric junction box of FIG. FIG. 3 is a perspective view showing an electrical connection structure with the second electrical component mounting block, FIG. 3 is a plan view of the second electrical component mounting block of FIG. 2, and FIG. 4 is used for the second electrical component mounting block of FIG. It is a top view of a bus bar.

  An electric junction box 10R for right-hand drive vehicles includes a junction box main body 11R for a right-hand drive vehicle, a first electric component mounting block 20 and a second electric component 20 that are slidably fitted into corresponding frame-like portions of the junction box main body 11R. The component mounting block 30 and a bus bar 40R that electrically connects the first electrical component mounting block 20 and the second electrical component mounting block 30 are provided. Here, a cassette type super multi-fusible link (so-called SMFL) is used as the first electric component mounting block 20, and a cassette type fuse block (so-called F / B) is used as the second electric component mounting block 30. Is used.

  The bus bar 40R is assembled to the second electrical component mounting block 30. Between the first and second electrical component mounting blocks 20, 30, one end portion 41 of the bus bar 40R disposed in the second electrical component mounting block 30 is connected. These are electrically connected by being connected to terminals 28 arranged on the first electric component mounting block 20. One end 41 of the bus bar 40R protrudes so as to be exposed to the outside of the housing 31 of the second electrical component mounting block 30. The bus bar 40R has a plurality of tuning fork terminals that are electrically connected to terminals of electrical components (fusible link, blade type fuse, etc.) mounted on the second electrical component mounting block 30 on the other end side. It has the terminal part 48 provided in series.

  One end portion 41 of the bus bar 40R protrudes in a vertical posture from the approximate center in the width direction of one end surface of the second electric component mounting block 30 in the longitudinal direction. The one end 41 projecting in this vertical posture has a rectangular intermediate plate portion 43 via a vertical fold line 42, and further to the intermediate plate portion 43, a bolt through hole 46 via a horizontal fold line 44. And a connecting plate portion 45 having a line. One end portion 41 of the bus bar 40R is bent at a substantially right angle at each of a vertical fold line 42 and a horizontal fold line 44, whereby a connecting plate portion 45 is formed horizontally. Then, the connecting plate portion 45 is placed on the terminal 28 disposed on the first electric component mounting block 20, the stud bolt 29 is passed through the bolt through hole 46, and the nut 60 is screwed onto the tip end portion of the stud bolt 29. Thus, the bus bar 40R on the second electrical component mounting block 30 side is electrically connected to the terminal 28 and the stud bolt 29 on the first electrical component mounting block 20 side.

  The terminals 28 and stud bolts 29 protruding upward through the terminals 28 are provided on the upper portions of both sides of the housing 21 of the first electric component mounting block 20 in a bilaterally symmetrical manner. Further, on the inner surface of the frame-like portion of the junction box main body 11R into which the second electric component mounting block 30 is fitted, a bus bar 40R protruding from the approximate center in the lateral width direction of one longitudinal end surface of the second electric component mounting block 30 is provided. Engaging portions 12 and 12 are provided symmetrically with respect to the one end portion 41. The one end surface in the longitudinal direction of the second electric component mounting block 30 is engaged with the engaging portions 12 and 12 symmetrically with respect to the one end portion 41 of the bus bar 40R protruding from the approximate center in the width direction of the one end surface. Engaged portions 37 and 37 to be mated are provided.

  In the case of the right-hand drive vehicle specification, the connecting plate portion 45 of the bus bar 40R is connected to the left terminal 28 and the stud bolt 29 for the right-hand drive vehicle, and the engaging portions 12, 12 for the right-hand drive vehicle and the engaged portion 37, The electric connection box 10R of the right-hand drive vehicle specification can be assembled by engaging the members 37 with each other. As shown in FIG. 2, the first electrical component mounting block 30 is equipped with a fusible link 32 and a blade-type fuse 33 as electrical components. Moreover, in this example, since the thing similar to the engaging parts 12 and 12 is provided also in the inner surface of the frame-shaped part of the right side of the junction box main body 11R of FIG. 1, it attaches | subjects and shows the same code | symbol 12. .

Second Embodiment
FIG. 5 is a plan view showing the internal configuration of an electric junction box of the left-hand drive vehicle specification according to the second embodiment of the present invention, and FIG. 6 is a plan view of a second electric component mounting block arranged in the electric junction box of FIG. FIG. 7 and FIG. 7 are plan views of bus bars used in the second electric component mounting block of FIG.

  An electric connection box 10L for a left-hand drive vehicle includes a connection box main body 11L for a left-hand drive vehicle, a first electric component mounting block 20 and a second electric fitting block 20 that are slidably fitted into corresponding frame-like portions of the connection box main body 11L. The component mounting block 30 and a bus bar 40L that electrically connects the first electrical component mounting block 20 and the second electrical component mounting block 30 are provided.

  In the case of the left-hand drive vehicle specification, the bus bar 40L for the left-hand drive vehicle is first assembled in the second electric component mounting block 30. Here, the difference between the bus bar 40R for the right-hand drive vehicle and the bus bar 40L for the left-hand drive vehicle is only that the direction of the intermediate plate portion 43 and the connection plate portion 45 of the one end portion 41 is reversed by 180 degrees. .

  More specifically, as shown in FIG. 8, a vertical fold line 42 and a horizontal fold line 44 are formed at one end of a conductive metal plate (that is, the material of the bus bars 40R and 40L) cut into the same shape. The direction of the intermediate plate portion 43 and the connecting plate portion 45 of the one end portion 41 can be set to be reversed by 180 degrees by setting the bending directions of the one end portions at the two folding lines to be opposite to each other.

  Thus, the second electric component mounting block 30 assembled with the bus bar 40L for the left-hand drive vehicle is prepared, and is electrically connected to the first electric component mounting block 20. At that time, the connecting plate portion 45 of the bus bar 40L is connected to the right terminal 28 and the stud bolt 29 for the left-hand drive vehicle, and the engaging portions 12 and 12 for the left-hand drive vehicle are engaged with the engaged portions 37 and 37. Combine. In this way, the electric connection box 10L for the left-hand drive vehicle is assembled.

  FIG. 9 is a circuit diagram of an electrical connection structure between the first electrical component mounting block 20 and the second electrical component mounting block 30. In the embodiment described above, since the two electric component mounting blocks 20 and 30 are directly connected to each other by the bus bars 40R and 40L without using the thick wire 140 (see FIG. 10) as in the prior art, Compared with the case where the blocks are electrically connected using the electrical wires (FIG. 10), it is possible to improve workability, reduce costs, and save space. Moreover, when electrically connecting the electrical component mounting blocks with the thick wire, it was necessary to connect the two terminals at both ends of the thick wire to the other side, but one place at one end of the bus bars 40R and 40L. Therefore, the contact resistance can be reduced (that is, the direct current resistance can be reduced). In addition, when connecting electrical component mounting blocks with thick electric wires that are difficult to bend, the electrical connection box was required to have a certain height, but this point can also be eliminated, and the height of the electrical connection box can be reduced. Can also be achieved. Further, by eliminating the thick electric wire, the fuse 121 (see FIG. 10) required for the design of the electric wire can be eliminated (the fuse does not have to be provided for the bus bar).

  Further, in the above-described bus bars 40R and 40L, the intermediate plate portion 43 and the connecting plate portion 45 are set by reversing the folding directions at two folding lines such as the vertical folding line 42 and the horizontal folding line 44. The direction of the bend can be set 180 degrees in reverse, so the electric connection box for the right-hand drive car and the electric connection box for the left-hand drive car have different bending directions at one end of the bus bar with the same cut shape. This makes it easy to create and share parts.

  Further, the first electrical component mounting block 20 is provided with terminals 28 and stud bolts 29 symmetrically on the left and right sides, the engaging portions 12 and 12 are provided on the connection box bodies 11R and 11L, and the second electrical component mounting block 30 is provided. Since the engaged portions 37 and 37 are provided symmetrically on the left and right, the right-hand drive vehicle specification electric connection box 10R and the left-hand drive vehicle specification can be selected by appropriately selecting the terminal 28 for connecting the one end portion 41 of the bus bars 40R and 40L. The electric junction box 10L can be assembled using common parts, and the cost can be reduced.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing a schematic internal configuration of an electric junction box for a right-hand drive vehicle that is a first embodiment of the present invention. It is a perspective view which takes out and shows the electrical connection structure of the 1st electrical component mounting block and the 2nd electrical component mounting block which are arrange | positioned in the electrical junction box of FIG. It is a top view of the 2nd electric component mounting block of FIG. It is a top view of the bus bar used for the 2nd electric component mounting block of FIG. It is a top view which shows the internal structure of the electric connection box of the left-hand drive vehicle specification which is 2nd Embodiment of this invention. It is a top view of the 2nd electrical component mounting block arrange | positioned in the electrical-connection box of FIG. It is a top view of the bus bar used for the 2nd electric component mounting block of FIG. It is an enlarged view which shows the structure of the one end part of the said bus bar. It is a circuit diagram of the electrical connection structure of the 1st electrical component mounting block and 2nd electrical component mounting block of this invention. It is a circuit diagram of a conventional example.

Explanation of symbols

10R, 10L: Junction box body 20: first electrical component mounting block (the other electrical component mounting block)
12, 12: engaging portion 28: terminal 29: stud bolt 30: second electric component mounting block (one electric component mounting block)
31: Housing 37, 37: Engaged portion 40R, 40L: Bus bar 41: One end portion 42: Vertical fold line 43: Intermediate plate portion 44: Horizontal fold line 45: Connection plate portion 46: Bolt through hole

Claims (3)

Two electrical component mounting blocks are fitted in the junction box body, and one end of the bus bar disposed inside the one electrical component mounting block protrudes outside the one electrical component mounting block. the parts are electrically connected by direct connection to one of the other electrical component attachment block two arranged symmetrically on the terminal, moreover, the bus bar is mounted to the one of the electrical component mounting block An electrical connection box comprising a terminal portion that is in direct contact with and electrically connected to a terminal of an electrical component to be connected.   One end portion of the bus bar protrudes in a vertical posture from a substantially center in the width direction of one end surface in the longitudinal direction of the one electric component mounting block, and the one end portion of the bus bar is inserted through a vertical fold line. A rectangular intermediate plate portion, and a connecting plate portion having a bolt through hole connected to the intermediate plate portion via a horizontal fold line, and one end portion of the bus bar is the vertical fold line And the horizontal fold line are bent at substantially right angles, and the connecting plate portion is fastened to a terminal disposed on the other electric component mounting block by a bolt passed through the bolt through hole. The electrical junction box according to claim 1, wherein the electrical junction box is provided. Sutaddoboru bets is provided which penetrates the terminal arranged symmetrically to the other electrical component mounting on the block, engage engaging the longitudinal end surface of the one of the electrical component mounting block to the connection box body The engaging portion is provided symmetrically on one end surface in the longitudinal direction of the one electric component mounting block with the one end portion of the bus bar protruding from the substantially center in the width direction of the one end surface interposed therebetween. The electrical connection box according to claim 2, further comprising an engaged portion that engages with the electric connection box.

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