JP2008004327A - Fusible link unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fusible link unit which can flexibly correspond to the increasing number of the loading connection terminals in spite of its compact form, and can improve the current sensor mounting arrangement. <P>SOLUTION: The fusible link unit includes an input bus bar 10 having a battery terminal connector 21 at the front side, while an output bus bar 70 connected with the input bus bar at the rear side; and a sensor accommodation 50 for accommodating a current sensor 100 at the center in the left and right directions around the position where the output bus bar is arranged. Many loading connection terminals 75 which are located at both left and right sides of the sensor accommodation and are composed of an integrated combination of the output bus bar via a fuse element 74 are arranged in line with each other in the forward and backward direction of the unit. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a battery direct attachment type fusible link unit connected to a battery of an automobile or the like without a cable.

  As this type of fusible link unit, the one described in Patent Document 1 is known.

  FIG. 12 shows an example thereof, and FIG. 13 shows its circuit configuration. This fusible link unit M10 has a fuse structure formed by a single bus bar 110. The bus bar 110 and an insulating resin housing portion 591 which is insert-molded so as to partially cover the outer periphery of the bus bar 110. It consists of.

  A first flat plate portion 511 having a battery terminal connection portion 520 and a starter terminal connection portion 521 is connected to the input side of the bus bar 110 that is held substantially horizontally, and is connected to the first flat plate portion 511 via a fuse element 513. And a second flat plate portion 512 having an alternator terminal connection portion 523. Further, the output side of the bus bar 110 is bent in an L shape vertically downward, and a load connection terminal 516 described later is provided on the output side via a fuse element 515 (shown in FIG. 12). See Figure 13 for what is not done).

  A battery post connecting member 552 is connected to the battery terminal connecting portion 520 by a bolt 551. By connecting the battery post connecting member 552 to a post of a battery (BAT) (not shown), the fusible link unit M10 is connected to the battery. It can be directly attached to.

  Further, a starter terminal mounting bolt 553 is erected upward at the starter terminal connection portion 521, and the starter (STA) terminal 601 can be connected to the starter terminal connection portion 521 by this bolt 553. Further, an alternator terminal mounting bolt 554 is erected upward at the alternator terminal connecting portion 523, and the alternator (ALT) terminal 602 can be connected to the alternator terminal connecting portion 523 by this bolt 554.

  The battery terminal connection portion 520 is disposed at the front portion of the unit, and the starter terminal connection portion 521 and the alternator terminal connection portion 523 are disposed side by side on the rear side. The starter terminal 601 and the alternator terminal 602 can be connected to the starter terminal connection part 521 and the alternator terminal connection part 523 from the rear of the unit, respectively.

  In addition, a plurality of load connection terminals 516 are provided below the starter terminal connection part 521 and the alternator terminal connection part 523 in the left-right direction and respectively downward through the fuse elements 515. Some of the load connection terminals 516 are connected to the rear end edge of the second flat plate part 512 having the alternator terminal connection part 523 via the fuse element 515, and the other part of the load connection terminal 516 is The fuse plate 515 is connected to the rear end edge of the second flat plate portion 512 having the starter terminal connection portion 521 through the fuse element 515. All the load connection terminals 516 may be connected to the rear end edge of the second flat plate part 512 having the alternator terminal connection part 523 via the fuse element 515.

  The load connection terminal 516 constitutes a load connection connector 595 by being accommodated in a connector housing portion provided at the lower end portion of the resin housing portion 591. Then, by fitting a load-side connector 596 provided at the tip of the load-side electric wire W4 into these load-connecting connectors 595, the load-side electric wire W4 and the load-connecting terminal 516 can be made conductive. .

An alternator terminal 602 attached to the tip of the alternator cable W3 is in the form of a strip plate, and is connected to the alternator terminal connection portion 523 through the through hole 701 of the current sensor 700, whereby the current sensor 700 is connected to the alternator terminal 602. It is attached to. Reference numeral 710 denotes a connector for taking out a sensor signal. The current sensor 700 is, for example, a combination of a magnetic core (not shown) having a through hole 701 and a Hall element and embedded in a nonmagnetic case.
Japanese Patent Laying-Open No. 2003-139803 (FIG. 6)

  By the way, with the increase in the number of loads connected to the fusible link unit, the number of load connection terminals tends to increase. However, in the conventional fusible link unit M10, the load connection terminals 516 are arranged in the horizontal direction of the unit. Therefore, when mounting in a limited in-vehicle space, there is a limit in greatly increasing the number of load connection terminals 516 without interfering with other components. In addition, when the current sensor was attached, it was attached in the form of protruding to the upper side of the unit.

  In consideration of the above circumstances, the present invention is a fusible link unit that can flexibly cope with an increase in load connection terminals while being in a compact form, and can improve the fit when a current sensor is attached. The purpose is to provide.

  In the fusible link unit of the invention of claim 1, an input bus bar having a battery terminal connection portion is arranged at the front portion of the unit, and an output bus bar connected to the input bus bar is arranged at the rear portion of the unit, A sensor accommodating portion for accommodating a current sensor is secured at a central portion in the left-right direction of the place where the output bus bar is disposed, and is positioned at least one of the left and right side portions of the sensor accommodating portion. A plurality of load connection terminals integrally formed through the fuse element are arranged in the front-rear direction of the unit.

  The invention according to claim 2 is the fusible link unit according to claim 1, wherein a main plate portion is arranged substantially horizontally at the center in the left-right direction of the output bus bar, and on both left and right sides of the output bus bar, By being bent, side plate portions located on the left and right side portions of the sensor housing portion are provided, and the load connection terminals are integrally formed below the side plate portions via the fuse elements, and the input bus bar and the output bus bar The resin housing portion of the unit is insert-molded so that both bus bars are integrally included with the necessary parts exposed, and the final shape is a flat output bus bar having the side plate portion, the fuse element, and the load connection terminal. After the resin housing part is insert-molded into a flat shape, the side plate part is placed at the starting point of the side plate part. By bending downwards and the resin housing portion including the portion together, characterized in that it is formed.

  The invention of claim 3 is the fusible link unit according to claim 2, wherein the left and right side plate parts bent to form the final shape and the resin housing part including the part are bent. It is characterized by being fixed with a clip for holding the shape.

  Invention of Claim 4 is a fusible link unit of any one of Claims 1-3, Comprising: The said input terminal bar has the said battery terminal connection part and a starter terminal connection part, and is substantially horizontal. A first plate portion that is arranged, and a second plate portion that is connected to the first plate portion immediately after the first plate portion via a fuse element and is disposed substantially horizontally with an alternator terminal connection portion. The second plate portion and the output bus bar are connected by a connection plate retrofitted from above over the sensor housing portion.

  A fifth aspect of the invention is the fusible link unit according to the fourth aspect of the invention, wherein a standing wall is provided at an end portion in the left-right direction of the second plate portion of the input bus bar, and the connection plate corresponding thereto. A standing wall is provided at an end in the left-right direction, and the two standing walls are stacked with the connecting plate placed on the upper surface of the second plate portion, and the two standing walls are stacked. The formed portion is configured as the alternator terminal connecting portion capable of connecting the alternator terminal by tightening with a bolt in a substantially horizontal direction.

  Invention of Claim 6 is a fusible link unit of Claim 5, Comprising: Of two standing walls which comprise the said alternator terminal connection part, the standing wall by the side of the 2nd board part of the said input bus bar is mentioned. The portion through which the bolt passes is constituted by a U-shaped slot opened upward.

  A seventh aspect of the present invention is the fusible link unit according to the fifth or sixth aspect, wherein the bolt is crimped to an upright wall on the connection plate side.

  The invention according to claim 8 is the fusible link unit according to claim 1, wherein a center portion in the left-right direction of the output bus bar is arranged substantially horizontally, and is bent downward on both left and right sides of the output bus bar. Thus, side plate portions located on the left and right side portions of the sensor housing portion are provided, and the load connection terminals are integrally formed via the fuse element at the lower portion of the side plate portions, and necessary portions of the output bus bars are exposed. The resin housing portion of the unit is insert-molded so as to integrally include the output bus bar in a state of being made, while the substantially horizontal first plate portion having the battery terminal connection portion on the input bus bar, A substantially vertical second plate portion connected via a fuse element is provided on the rear side of the first plate portion, and between the input bus bar and the output bus bar, A connection plate that is retrofitted from above is disposed across the housing portion, the rear end of the horizontal plate portion of the connection plate is connected to the output bus bar, and is bent at the front portion of the horizontal plate portion In a state where the vertical wall is overlapped with the second plate portion of the input bus bar, the vertical wall is engaged with a stud bolt provided on the front wall of the resin housing portion together with the second plate portion. The joined portion is configured as an alternator terminal connecting portion for connecting an alternator terminal.

  The invention according to claim 9 is the fusible link unit according to claim 8, wherein the output bus bar and the resin housing portion constitute a main body unit, and the input bus bar is integrally included. The input case unit is configured by the input bus bar and the resin case part by insert molding the resin case part for the part, and the main body is connected to the rear end part of the input part unit and the front end part of the main body part unit. A slide guide mechanism that performs a guide action when the input unit is fitted to the unit from above, and further, on the second plate portion of the input bus bar and the vertical plate portion of the connection plate, from above. A U-shaped slot that engages with the stud bolt is provided by sliding the second plate portion and the vertical plate portion.

  According to the first aspect of the present invention, a sensor accommodating portion for accommodating the current sensor is secured in the central portion in the left-right direction of the location where the output bus bar is disposed, and is positioned on the left and right side portions of the sensor accommodating portion, and Since multiple load connection terminals are arranged in the longitudinal direction of the unit, even if the number of load connection terminals is increased, the whole can be compactly packed so that the left and right dimensions do not increase. Even when the mounting space cannot be secured with sufficient margin, the mounting conditions can be satisfied. Moreover, the freedom degree of arrangement | positioning of the connector part containing a load connection terminal increases. In addition, when the current sensor is attached, it only needs to be assembled in the sensor housing portion secured in the center, so that the fit is good.

  According to the invention of claim 2, at the time of insert molding, it is only necessary to form the whole in a flat manner, and since the final shape is formed by bending after molding, the molding can be facilitated and the molding cost is not incurred. The input bus bar and the output bus bar may be formed integrally.

  According to the invention of claim 3, the left and right side plate portions bent to form the final shape and the resin housing portion including the portion are fixed by the clip for holding the bent shape. It is possible to prevent the deformation due to the spring back and to keep the final shape stably.

  According to invention of Claim 4, since the 2nd board part of an input bus bar and an output bus bar are connected by the connection plate retrofitted, after attaching a connection plate to the through-hole of an electric current sensor, a connection plate and an electric current sensor are attached. It can be assembled in a regular position. Moreover, by removing the connection plate, the current sensor can be easily detached, and the current sensor can be easily attached and detached.

  According to the invention of claim 5, since the alternator terminal is tightened together through the bolt from the horizontal direction on the portion where the standing wall provided on the input bus bar and the standing wall provided on the connection plate are overlapped, Compared to the case of connecting with bolts, a marginal space can be opened below the adjacent region. Therefore, even when there is a starter terminal connection part in the area adjacent to the alternator terminal connection part, the starter terminal can be bolted from the vertical direction without worrying about interference of bolts and terminals. Work can be carried out without difficulty. In addition, the distance between the alternator terminal connection portion and the starter terminal connection portion can be reduced and the layout can be reduced, thereby contributing to the compactness of the unit.

  According to the sixth aspect of the present invention, the portion of the input bus bar through which the bolt of the standing wall on the second plate portion side is passed is constituted by a U-shaped slot that opens upward, so that the bolt is attached to the standing wall on the connection plate side. In this state, the bolt can be inserted into the U-shaped slot simply by placing the connecting plate on the second plate portion of the input bus bar from above, and the alternator terminal can be fastened together. Therefore, it is possible to easily attach / detach the connection plate, that is, attach / detach the current sensor.

  According to the seventh aspect of the present invention, since the bolt is crimped to the upright wall on the connection plate side, the connection plate can be attached and detached, that is, the current sensor can be easily attached and detached.

  According to the invention of claim 8, the connection between the input bus bar and the connection plate is performed by overlapping the vertically bent portions (second plate portion and vertical plate portion) and tightening with the bolts. Since the alternator terminal is fastened together, the front-rear dimension of the unit can be shortened, contributing to compactness.

  According to the invention of claim 9, since the main body unit and the input unit are fitted through the slide guide mechanism, both can be coupled so as to withstand vibration and stress, and the input unit The main body unit can be stably supported simply by attaching to the battery. Further, the assembly can be easily performed by simply sliding the input unit and the connection plate from above the main unit.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<First Embodiment>
1 to 9 are explanatory views of a first embodiment of the present invention. FIG. 1 is a perspective view showing only the internal busbar portion with the resin housing portion removed, FIG. 2 is a side view thereof, and FIG. 3 is a current sensor. FIG. 4 is a perspective view of a completed fusible link unit, FIG. 5 is a plan view thereof, FIG. 6 is a longitudinal sectional view thereof, and FIG. 7 is a configuration of only a bus bar at a stage pressed into a flat shape. FIG. 8 is a perspective view of a molded product in which a bus bar is incorporated in a molding die and a resin housing part is insert-molded. FIG. 9 is a perspective view showing a state in which the molded product is bent and a fixing clip is inserted. is there.

  As shown in FIGS. 1 to 6, the fusible link unit M <b> 1 of this embodiment includes an input bus bar 10 having a battery terminal connection part and a starter terminal connection part 21 at the front part of the unit, and a rear part of the unit. An output bus bar 70 is arranged on the right side, and a sensor accommodating portion 50 for accommodating the current sensor 100 is secured in the central portion in the left-right direction of the place where the output bus bar 70 is disposed, and the left and right sides of the sensor accommodating portion 50 are secured. A plurality of load connection terminals 75 formed integrally with the output bus bar 70 via the fuse element 74 are arranged in the front-rear direction of the unit, and the input bus bar 10 and the output bus bar 70 are further connected to the sensor housing portion 50. Is connected by a connection plate 80 retrofitted from above, and the connection plate 80 is accommodated in the sensor accommodating portion 50. It is obtained through the through hole 101 of the flow sensor 100.

  As shown in FIG. 1, the connection plate 80 is inserted into the sensor housing portion 50 with the current sensor 100 penetrating through the through hole 101 of the current sensor 100, so that the connection plate 80 is formed on the upper surface of the input bus bar 10 and the output bus bar 70. It is mounted and fixed, and has a connection hole 85 for the output bus bar 70 at the rear end and a bolt 82 for connection to the input bus bar 10 at the front end.

  As shown in FIG. 1, the input bus bar 10 includes a first plate portion 11 having a battery terminal connection portion and a starter terminal connection portion 21 arranged substantially horizontally, and the first plate portion 11 immediately after the first plate portion 11. A second plate portion 12 is provided that is connected to the one plate portion 11 via the fuse element 13 and has an alternator terminal connection portion 31 and is disposed substantially horizontally.

  Bolts 23 are passed through bolt holes 22 in the first plate 11 corresponding to the battery terminal connection part and starter terminal connection part 21, and the battery 23 is connected to the battery by the bolts 23 and nuts 211 (see FIG. 4). The battery post connecting member 25 connected to the post 1 (see FIG. 1) and the starter terminal 201A (see FIGS. 2 and 3) at the tip of the starter electric wire 201 are fastened together.

  Further, as shown in FIG. 1, a main plate portion 71 is disposed substantially horizontally at the center in the left-right direction of the output bus bar 70, and the right and left side portions of the output bus bar 70 are bent vertically downward to accommodate the sensor. Side plate portions 73 positioned on both left and right side portions of the portion 50 are provided, and load connection terminals 75 are arranged below the left and right side plate portions 73 with fuse elements 74 arranged in the front-rear direction of the unit.

  A connection plate 80 that is retrofitted from above across the sensor housing portion 50 is placed and fixed on the upper surfaces of the second plate portion 12 and the main plate portion 71 of the output bus bar 70.

  A hole 71h is provided in the center of the main plate portion 71, and a stud bolt 87 is erected upward through the hole 71h. The connection hole 85 at the rear end of the connection plate 80 is fitted into the stud bolt 87. Thus, the connection plate 80 and the terminal 203A at the tip of the load-side electric wire 203 are fastened together using a nut 213 (see FIG. 5).

  In addition, an upright wall 14 is provided at one end portion in the left-right direction of the second plate portion 12 of the input bus bar 10, and a corresponding upright wall 81 is provided at one end portion in the left-right direction at the front end of the connection plate 80. Yes. And in the state which mounted the front end of the connection plate 80 on the upper surface of the 2nd board part 12, both the standing walls 14 and 81 are piled up, The part on which the two standing walls 14 and 81 were piled up is the part. An alternator terminal connection 31 is configured.

  The alternator terminal connecting portion 31 is a portion for connecting the alternator terminal 202A at the tip of the alternator electric wire 202 by tightening the nut 212 through the bolt 82 in a substantially horizontal direction.

  In this case, of the two upright walls 14 and 81 constituting the alternator terminal connecting portion 31, the portion through which the bolt of the upright wall 14 on the second plate portion 12 side of the input bus bar 10 passes is an upwardly open U-shape. It is configured as a slot 32. Further, the head of the bolt 82 is crimped to the upright wall 81 on the connection plate 80 side in a lateral posture. Therefore, the shaft portion of the bolt 82 can be inserted into the U-shaped slot 32 simply by placing the front end of the connection plate 80 on the second plate portion 12 of the input bus bar 10 from above, and the alternator terminal 202A is used as it is. Can be fastened together with a nut 212.

  Further, as shown in FIG. 3, the resin housing portion 91 of the unit is insert-molded so that both the bus bars 10 and 70 are integrally included in a state where necessary portions of the input bus bar 10 and the output bus bar 70 are exposed. Yes. The sensor housing part 50 is formed as a central space of the resin housing part 91, and a lock claw 51 for preventing the current sensor 100 inserted from above from coming off is provided on the inner wall of the sensor housing part 50. ing.

  The final shape of the fusible link M1 is substantially U-shaped when viewed from the front, and the final shape of the fusible link M1 is that a molded product 90 formed into a flat shape as shown in FIG. It is formed by bending at the line S.

  That is, first, as shown in FIG. 7, an output bus bar 70 having a main plate portion 71, a side plate portion 73, a fuse element 74, and a load connection terminal 75 is formed into a flat shape. At this time, a fold line 71 a is provided at a position where the side plate portion 73 becomes a starting point. This fold line 71a corresponds to the fold line S of the molded product 90 of FIG.

  Next, together with other insert parts (input bus bar 10 and stud bolt 87), the output bus bar 70 is loaded into a molding die, and the resin housing portion 91 is insert-molded in a flat shape as shown in FIG. In that case, it molds so that a required location may be exposed outside.

  In FIG. 8, 91 </ b> A is a resin upper wall portion that covers the main plate portion 71 and the input bus bar 10 of the bus bar 70, and 91 </ b> B is a resin side wall portion that covers the side plate portion 73. The boundary between the resin upper wall portion 91 </ b> A covering the main plate portion and the resin side wall portion 91 </ b> B covering the side plate portion is configured as a fold line S by, for example, a thin hinge so that it can be easily bent later.

  Further, the fuse elements 13 and 74 are exposed in the window portions 93 and 94 so that the resin is not covered, and transparent covers 93C and 94C are attached to the window portions 93 and 94 later.

  As shown in FIG. 8, when the insert molding is performed in a flat shape, both side portions of the molded product 90 are bent vertically downward along a folding line S. Then, when folded so as to be U-shaped when viewed from the front, in order to maintain the final shape, it is fixed to the slide groove 98a provided on the inner and outer surfaces of the resin side wall portion 91B in a substantially U-shape in plan view from the rear. The clip 98 is slide-fitted to fix the interval and angle of the resin side wall portion 91B.

  As described above, a unit body having a substantially U-shape in front view is completed, and the connecting plate 80 and the current sensor 100 are assembled to the unit body, whereby the fusible link unit M1 of the present embodiment is completed. In this completed state, the load connection terminal 75 is accommodated in the housing below the resin side wall portion 91B, and the load connection connector 95 is configured by this portion. Therefore, each load connection terminal 75 and the load side electric wire 204 can be connected by fitting the load connection connector 95 with the connector 204C of the load side electric wire 204.

  Next, the operation will be described.

  The fusible link unit M1 of the present embodiment secures a sensor housing portion 50 for housing the current sensor 100 at the center in the left-right direction of the place where the output bus bar 70 is disposed, and the left and right side portions of the sensor housing portion 50 Since the plurality of load connection terminals 75 are arranged side by side in the front-rear direction of the unit, even if the number of load connection terminals 75 increases, the entire size is prevented so that the horizontal dimension does not increase. Even if the mounting space in the left-right direction cannot be secured with sufficient margin, the mounting conditions can be satisfied, and the degree of freedom of arrangement of the load connection connector 95 including the load connection terminals 75 is increased. In addition, the current sensor 100 only needs to be assembled in the sensor housing part 50 secured in the center, so that the current sensor 100 fits well.

  Further, since the second plate portion 12 of the input bus bar 10 and the output bus bar 70 are connected by a connection plate 80 to be retrofitted, the connection plate 80 and the through-hole 101 of the current sensor 100 are passed through the connection plate 80. The current sensor 100 can be assembled at a regular position, and the assembly can be simplified. Moreover, the current sensor 100 can also be easily removed by removing the connection plate 80. In addition, although the case where the current sensor 100 was attached was shown in the example of illustration, it can also be used without attaching the current sensor 100.

  Further, a portion where the upright wall 14 provided on the second plate portion 12 of the input bus bar 10 and the upright wall 81 provided at the front end of the connection plate 80 are overlapped is used as an alternator terminal connection portion 31, and a bolt 82 is passed through the portion from the horizontal direction. Since the alternator terminal 202A can be tightened together by tightening the nut 212, an extra space can be formed below the adjacent region as compared with the case where the bolts are connected in the vertical direction.

  Therefore, even when the battery terminal connection part and the starter terminal connection part 21 are present in the area adjacent to the alternator terminal connection part 31 as in this example, the interference of the bolts 23 and 82 and the terminals 201A and 202A is not particularly concerned. In addition, the starter terminal 201A can be fastened with the bolt 23 from the vertical direction, and the connection work of the terminals 201A and 202A can be easily advanced without difficulty.

  Further, since the alternator terminal connection portion 31, the battery terminal connection portion, and the starter terminal connection portion 21 can be laid out at a short distance, the unit can be made compact.

  In the present embodiment, the portion through which the bolt of the rising wall 14 on the second plate portion 12 side of the input bus bar 10 passes is configured as an upwardly open U-shaped slot 32. With the bolt 82 attached to the wall 81, the bolt 82 can be inserted into the U-shaped slot 32 just by placing the connection plate 80 on the second plate part 12 of the input bus bar 10 from above. The alternator terminal 202A can be fastened together with the nut 212.

  In addition, in this embodiment, the bolt 82 is crimped to the standing wall 81 of the connection plate 80 in advance, so that it is not necessary to attach the bolt 82 later. 100 can be easily attached and detached.

  Further, in the present embodiment, as shown in FIG. 8, after insert molding in a flat shape, the molded product 90 is bent at a predetermined folding line S, thereby forming a fusible link unit M <b> 1 as a finished product. Therefore, at the time of insert molding, it is sufficient to simply form the whole in a flat manner, and there is an advantage that the molding can be easily performed.

  In addition, since the left and right side plate portions 73 bent to the final shape and the resin side wall portion 91B including the portion are fixed by the fixing clip 98 for maintaining the bent shape, the bent portion is deformed by the spring back. It is possible to prevent and stably hold the final shape. It is desirable that the clip 98 be fixed at a position away from the bent portion because the clip 98 can be reliably fixed with a small clip 98 and the bending angle can be reliably maintained.

<Second Embodiment>
10 and 11 are explanatory diagrams of the fusible link unit according to the second embodiment of the present invention, FIG. 10 is an exploded perspective view, and FIG. 11 is an external perspective view.

  The fusible link unit M2 of this embodiment is a combination of a main body unit M21, an input unit M22, a connection plate 180, and a current sensor 100.

  The main body unit M21 includes an output bus bar 170 and a resin housing portion 191 which is insert-molded by loading the output bus bar 170 into a molding die. The input unit M22 includes an input bus bar 110 and the input bus bar. The resin case portion 192 is insert-molded by loading 110 into a mold. The input unit M22 is coupled to the front portion of the main body unit M21 by sliding from above, and a slide groove 194a and a slide rail 194b, which are slide guide mechanisms, are provided at the coupling unit.

  The input bus bar 110, which is a component of the input unit M22, includes a substantially horizontal first plate portion 111 having a bolt through hole 122 as a battery terminal connection portion and a starter terminal connection portion 121, and a rear portion of the first plate portion 111. And a substantially vertical second plate portion 112 connected to the side through a fuse element 113. Further, the resin case portion 192 for the input portion is insert-molded so as to integrally include the input bus bar 110 with the necessary portions of the input bus bar 110 exposed, thereby forming the input portion unit M22. Yes.

  In addition, a sensor housing 150 for housing the current sensor 100 is secured at the center of the main body unit M21. The sensor housing 150 is positioned on both the left and right sides of the sensor housing 50 and arranged in the front-rear direction of the unit. In this state, a plurality of load terminal connection portions (not shown) are arranged.

  The output bus bar 170 constituting the main body unit M21 includes a main plate portion 171 located at the center in the left-right direction and supported substantially horizontally, and left and right extending vertically below the left and right side edges of the main plate portion 171. Side plate portions 173 and load connection terminals (not shown) connected to the lower portions of the side plate portions 173 via fuse elements (not shown), and are substantially U-shaped when viewed from the front. ing.

  The fuse element and the load connection terminal are configured in substantially the same manner as in the example of FIG. 1, and the load connection terminal is accommodated in the lower portion of the side wall of the resin housing portion 191, so that the portion is configured as the load connection connector 195. Thus, the sensor accommodating portion 150 is secured between the left and right load connection connectors 195.

  In addition, the connection plate 180 is passed through the through hole 101 of the current sensor 100 housed in the sensor housing portion 150 and retrofitted from above over the sensor housing portion 150, whereby the input bus bar 110 and the output bus bar 170. And has a connection hole 185 for a stud bolt 187 protruding on the main plate portion 171 of the output bus bar 170 at the rear end of the horizontal plate portion 180a passed through the through hole 101 of the current sensor 100. A vertical wall 180b bent downward is formed at the front of the plate portion 180a.

  The vertical wall 180b is engaged with a stud bolt 182 provided on the front wall of the resin housing portion 191 in a state of being overlapped with the second plate portion 112 of the input bus bar 110, and is engaged with the stud bolt 182. The portion is configured as an alternator terminal connecting portion 131 for connecting an alternator terminal.

  Here, the second plate portion 112 of the input bus bar 110 and the vertical plate portion 180b of the connection plate 180 are engaged with the stud bolt 182 by sliding the second plate portion 112 and the vertical plate portion 180b from above. Character-shaped slots 132 and 181 are provided.

  In order to assemble this fusible link unit M2, the current sensor 100 is accommodated in the sensor accommodating portion 150 of the main body unit M21 while the horizontal plate portion 180a of the connecting plate 180 is passed through the through hole 101, and the connecting plate 180 is The rear end of the horizontal plate portion 180 a is placed on the main plate portion 171 of the output bus bar 170. Then, the connection hole 185 at the rear end of the horizontal plate portion 180 a is fitted into the stud bolt 187 and fastened together with the load terminal by the nut 213.

  Further, the U-shaped slot 181 is engaged with the stud bolt 182 by causing the vertical plate portion 180 b at the front portion of the connection plate 180 to be along the front wall of the resin housing portion 191.

  At the same time, while fitting the slide groove 194a and the slide rail 194b, the input unit M22 is assembled to the front part of the main body unit M21 from above, and the U-shaped slot 132 of the second plate part 112 of the input bus bar 110 is formed. Engage with the stud bolt 182. Then, the alternator terminal is fastened to the stud bolt 182 with the nut 212.

  The fusible link unit M <b> 2 of the present embodiment secures a sensor accommodating portion 150 for accommodating the current sensor 100 in the central portion in the left-right direction where the output bus bar 170 is disposed, and the left and right side portions of the sensor accommodating portion 150. Since a plurality of load connection terminals (not shown) are arranged side by side in the front-rear direction of the unit, even if the number of load connection terminals increases as in the first embodiment, The whole can be compactly packed so that the directional dimension does not increase, and even when the mounting space in the left-right direction cannot be secured with sufficient margin, the mounting conditions can be satisfied and the load connection connector 195 including the load connection terminals can be satisfied. The degree of freedom in the arrangement of is also increased. In addition, the current sensor 100 only needs to be assembled in the sensor housing part 150 secured in the center, so that the current sensor 100 can be accommodated.

  Further, since the input bus bar 110 and the output bus bar 170 are connected by a connection plate 180 to be retrofitted, the connection plate 180 and the current sensor 100 are connected to each other through the connection plate 180 through the through hole 101 of the current sensor 100. It can be assembled to the position and can be assembled easily. Moreover, the current sensor 100 can also be easily removed by removing the connection plate 180. In addition, although the case where the current sensor 100 was attached was shown in the example of illustration, it can also be used without attaching the current sensor 100.

  Further, in this embodiment, the connection between the input bus bar 110 and the connection plate 180 is performed by overlapping the portions bent vertically downward (the second plate portion 112 and the vertical plate portion 180b) and tightening them with the bolts 182. Since the alternator terminal is fastened together with the bolt 182, the front-rear dimension of the unit can be shortened, which contributes to compactness.

  In the present embodiment, the main body unit M21 and the input unit M22 are fitted via the slide guide mechanism (the slide groove 194a and the slide rail 194b). The main body unit M21 can be stably supported by attaching the input unit M22 to the battery. Further, since the assembly can be performed simply by sliding the input unit M22 and the connection plate 180 from above the main body unit M21, the assemblability is good.

It is explanatory drawing of 1st Embodiment of this invention, and is a perspective view which removes the resin housing part and shows only a bus-bar part inside. It is a side view of the same part as FIG. It is a perspective view which abbreviate | omits and shows the current sensor of the same embodiment. It is a perspective view of the fusible link unit of the embodiment. It is a top view of the fusible link unit of the embodiment. It is a longitudinal cross-sectional view of the fusible link unit of the embodiment. It is explanatory drawing of the state in the middle of manufacture of the same embodiment, and is a perspective view which shows the structure of only the bus bar of the stage pressed to planar shape. It is a perspective view of the molded product which incorporated the said bus bar in the shaping | molding die and insert-molded the resin housing part. It is a perspective view which shows the state which is bending the said molded article and is going to insert a clip. It is a disassembled perspective view of the fusible link unit of 2nd Embodiment of this invention. It is an external appearance perspective view of the fusible link unit of the embodiment. It is a perspective view which shows an example of the conventional fusible link unit. It is a figure which shows the circuit structure of the fusible link.

Explanation of symbols

M1 fusible link unit 1 battery post 10 input bus bar 11 first flat plate portion 12 second flat plate portion 13 fuse element 14 standing wall 21 battery terminal connection portion and starter terminal connection portion 31 alternator terminal connection portion 32 U-shaped slot 50 sensor Housing 70 Output bus bar 71 Main plate portion 73 Side plate portion 74 Fuse element 75 Load connection terminal 80 Connection plate 81 Standing wall 82 Bolt 91 Resin housing portion 98 Fixing clip 100 Current sensor M2 Fusible link unit M21 Main body unit M22 Input unit 110 Input bus bar 111 First flat plate portion 112 Second flat plate portion 113 Fuse element 121 Battery terminal connection portion and starter terminal connection portion 131 Alternator terminal connection portion 132 U-shape Slot 150 sensor storage portion 170 outputs the bus bar 173 side plate 180 connecting plates 180a horizontal plate portion 180b vertical plate portion 181 U-shaped slot 182 the stud bolt 191 resin housing portion 192 resin case portion 194a slide groove (slide guide mechanism)
194b Slide rail (slide guide mechanism)

Claims (9)

  An input bus bar having a battery terminal connection portion is arranged at the front part of the unit, and an output bus bar connected to the input bus bar is arranged at the rear part of the unit, and the left and right direction of the place where the output bus bar is arranged A load accommodating terminal integrally formed with the output bus bar via a fuse element is secured in the central portion, and a sensor accommodating portion for accommodating the current sensor is secured, and is positioned on at least one of the left and right side portions of the sensor accommodating portion. A fusible link unit, wherein a plurality of the units are arranged in the front-rear direction of the unit. The fusible link unit according to claim 1,
A main plate portion is arranged substantially horizontally in the center in the left-right direction of the output bus bar, and side plate portions located on the left and right side portions of the sensor housing portion are provided by bending downward on the left and right side portions of the output bus bar. The resin of the unit is formed so that the load connection terminal is integrally formed through the fuse element at a lower portion of the side plate portion, and both bus bars are integrally included in a state where necessary portions of the input bus bar and the output bus bar are exposed. The housing part is insert-molded, and the final shape of the output bus bar having the side plate part, the fuse element, and the load connection terminal is formed into a flat shape, and the resin housing part is flattened by loading it into a mold. After insert molding, the side plate portion and the resin housing portion including the portion are bent downward together at the starting point of the side plate portion. Te, fusible link unit, characterized in that is formed. The fusible link unit according to claim 2,
A fusible link unit characterized in that the left and right side plate portions bent to form the final shape and a resin housing portion including the left and right side plate portions are fixed with clips for holding the bent shape. The fusible link unit according to any one of claims 1 to 3,
The input bus bar has the battery terminal connection portion and the starter terminal connection portion, and is arranged substantially horizontally, and immediately after the first plate portion, the first plate portion via a fuse element A second plate portion that is provided continuously and has an alternator terminal connection portion and is disposed substantially horizontally is provided, and the second plate portion and the output bus bar are retrofitted across the sensor housing portion from above. A fusible link unit connected by a connection plate. The fusible link unit according to claim 4,
A standing wall is provided at the left and right end portions of the second plate portion of the input bus bar, and a corresponding standing wall is provided at the left and right end portions of the connection plate, and is provided on the upper surface of the second plate portion. In the state where the connection plate is placed, the both standing walls are overlapped, and the portion where the two standing walls overlap is capable of connecting an alternator terminal by tightening it through a bolt in a substantially horizontal direction. A fusible link unit configured as an alternator terminal connection. The fusible link unit according to claim 5,
Of the two upright walls constituting the alternator terminal connecting portion, the portion through which the bolt of the upright wall on the second plate portion side of the input bus bar passes is constituted by a U-shaped slot opened upward. A fusible link unit. The fusible link unit according to claim 5 or 6,
The fusible link unit, wherein the bolt is crimped to an upright wall on the connection plate side. The fusible link unit according to claim 1,
The left and right central portions of the output bus bar are arranged substantially horizontally, and are bent downward on the left and right side portions of the output bus bar, thereby providing side plate portions positioned on the left and right side portions of the sensor housing portion. The resin housing portion of the unit is inserted in the lower part of the side plate portion so that the load connection terminal is integrally formed through the fuse element, and the output bus bar is integrally included in a state where a necessary portion of the output bus bar is exposed. On the other hand, the input bus bar has a substantially horizontal first plate portion having the battery terminal connection portion, and a substantially vertical first portion connected to the rear side of the first plate portion via a fuse element. A second plate portion is provided, and a connection plate retrofitted from above is disposed between the input bus bar and the output bus bar so as to straddle the sensor housing portion. In the state where the rear end of the horizontal plate portion of the gate is connected to the output bus bar, and the vertical wall bent at the front portion of the horizontal plate portion is overlapped with the second plate portion of the input bus bar. The stud bolt provided on the front wall of the resin housing portion is engaged together with the second plate portion, and the portion engaged with the stud bolt is configured as an alternator terminal connecting portion for connecting the alternator terminal. This is a fusible link unit. The fusible link unit according to claim 8,
The output bus bar and the resin housing part constitute a main body unit, and the input case resin case part is insert-molded so as to integrally include the input bus bar, whereby the input bus bar and the resin case part are formed. The input unit is composed of a slide that serves as a guide when the input unit is fitted to the main unit from above the rear end of the input unit and the front end of the main unit. A guide mechanism is provided, and further, the second plate portion and the vertical plate portion of the input bus bar are slid to the second plate portion and the vertical plate portion of the connection plate from above to engage with the stud bolt. A fusible link unit characterized in that a U-shaped slot is provided.

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