JP2011249210A - Electric connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric connection structure that reduces an assembly man-hour, component costs, etc.SOLUTION: A cable-side terminal portion 3 and a bus bar-side terminal portion 4 are electrically connected to each other by providing a pin member 6 and a dish spring member 7, inserting the pin member 6 from the side of the cable-side terminal portion 3, and inverting the disk spring member 7 on the side of the bus bar-side terminal portion 4. Even if force acting to slide the cable-side terminal portion 3 is applied along the formation direction of a slit 10, a pair of stopper portions 11 engage with a pin head portion 22 to maintain the connection state.

Description

  The present invention relates to an electrical connection structure in which a conductive first electrical contact member and a second electrical contact member are overlapped and electrically connected.

  As an example of a conventional electrical connection structure, there is a structure adopted in a fusible link unit mounted on a vehicle such as an automobile. For example, the fusible link unit disclosed in Patent Document 1 below has a plurality of conductive bus bars, and the bus bars are provided with bolting terminal portions. An LA terminal provided at one end of the cable is connected to the terminal portion for bolting. The other end of the cable is connected to a load. The LA terminal is superposed on the front side of the bolting terminal part, and is then brought into close contact with the bolting terminal part by tightening the bolt and nut, thereby completing the connection. The nut is provided in advance on the back side of the bolting terminal portion by press fitting or insert.

JP 2004-186005 A

  As the performance of vehicles increases, the number of loads mounted on vehicles is increasing year by year. Along with this, fusible link units have also become multipolar. The increase in the number of poles leads to an increase in the number of nuts to be press-fitted or inserted, leading to a complicated assembly process and an increase in the number of assembly steps. In addition, the cost of parts will increase. In addition, since the connection between the LA terminal and the bolting terminal portion is performed by tightening the bolt and the nut, there is a concern about the oblique tightening of the bolt. It will be.

  This invention is made | formed in view of an above-described situation, and makes it a subject to provide the electrical connection structure which can aim at reduction of an assembly man-hour, component cost, etc.

  The electrical connection structure of the present invention according to claim 1, which has been made to solve the above problems, is an electrical connection structure in which a conductive first electrical contact member and a second electrical contact member are overlapped and electrically connected. In the connection, the pin member inserted from the first electric contact member side and penetrating to the second electric contact member side, and engaged with the pin member on the second electric contact member side, And a disc spring member whose convex direction reverses from the first convex direction to the second convex direction by engagement.

  According to the present invention having such a feature, after the first electrical contact member and the second electrical contact member are overlapped, when the pin member is inserted from the first electrical contact member side, the pin is The member engages with the disc spring member, and the disc spring member reverses with this engagement. The inversion of the disc spring member acts in the direction of connecting and maintaining the first electric contact member and the second electric contact member that are in an overlapped state.

  The electrical connection structure of the present invention according to claim 2 is the electrical connection structure according to claim 1, wherein a rib is formed on the second electrical contact member, and the rib is formed on the disc spring member after the reversal. It is characterized by forming a lance in contact with the lance.

  According to the present invention having such a feature, when the convex direction of the disc spring member is reversed from the first convex direction to the second convex direction, the force at the time of returning from the reverse to the original convex direction is greater. Increase the power. Changing the force is realized by changing the fulcrum position depending on the presence or absence of ribs and lances.

  The electrical connection structure of the present invention according to claim 3 is the electrical connection structure according to claim 1 or 2, wherein a slit for the through pin of the pin member is formed in the first electrical contact member, A stopper portion that can be engaged with a pin head coupled to the penetrating pin is formed on the notch start side of the slit.

  According to the present invention having such a feature, the stopper portion engages with the pin head even when a force is applied to slide the first electrical contact member along the forming direction of the slit portion. Thereby, the connection state is maintained.

  An electrical connection structure according to a fourth aspect of the present invention is the electrical connection structure according to any one of the first to third aspects, further comprising an insulating housing as a base member for performing the connection. A separation regulating portion that regulates separation of the first electrical contact member and the second electrical contact member is formed.

  According to the present invention having such a feature, even when a force that separates the first electrical contact member is applied to the second electrical contact member, the separation regulating portion of the housing regulates the separation. Thereby, the connection state is maintained.

  According to the present invention described in claim 1, since a nut as in the conventional example is not used, it is not necessary to press-fit or insert the nut, and the bolt is not obliquely tightened. Further, if it is a disc spring member, it can be obtained at a lower cost than a nut. Therefore, according to the present invention, it is possible to reduce the number of assembling steps and parts costs as compared with the conventional example.

  According to the second aspect of the present invention, by forming the rib and the lance, there is an effect that it is possible to contribute to maintaining the connection state of the first electric contact member and the second electric contact member.

  According to the third aspect of the present invention, by forming the stopper portion and the pin head, it is possible to contribute to maintaining the connection state when using the first electric contact member having a slit. .

  According to the present invention described in claim 4, by forming the separation regulating portion, it is possible to regulate the separation of the first electrical contact member and the second electrical contact member and contribute to maintaining the connected state. Play.

It is a figure which shows the electrical connection structure of this invention, (a) is a disassembled perspective view, (b) is a perspective view (Example 1). It is sectional drawing which shows the state just before a connection. It is sectional drawing which shows the state after a connection. It is a figure which shows the electrical connection structure of this invention, and is sectional drawing which shows the state just before a connection (Example 2). It is sectional drawing which shows the state after a connection. It is a figure which shows the electrical connection structure of this invention, (a) is a disassembled perspective view, (b) is a perspective view (Example 3).

  When the electrically conductive first electric contact member and the second electric contact member are overlapped and electrically connected, a pin member and a disc spring member are provided. The convex direction of the disc spring member is reversed by the engagement of the pin member.

  Embodiment 1 will be described below with reference to the drawings. 1A and 1B are diagrams showing an electrical connection structure of the present invention. FIG. 1A is an exploded perspective view and FIG. 1B is a perspective view. 2 is a cross-sectional view showing a state immediately before connection, and FIG. 3 is a cross-sectional view showing a state after connection.

  In FIG. 1, reference numeral 1 indicates an electrical connection structure of the present invention. Here, the electrical connection structure 1 is employed in a fusible link unit mounted on a vehicle such as an automobile (for example, an electrical connection structure in a vehicle other than the fusible link unit). Naturally good.) Although an overall view of the fusible link unit is omitted, parts other than those described in this embodiment are basically the same in configuration and structure as a known fusible link unit.

  In the following description, the arrow P in the figure is the vertical direction, the arrow Q is the front-back direction, and the arrow R is the left-right direction.

  The electrical connection structure 1 includes a conductive cable side terminal portion 3 (first electrical contact member) provided at a terminal of a cable 2 and a conductive bus bar provided at a terminal of a bus bar (not shown) constituting a fusible link unit. Electrical connection of the side terminal portion 4 (second electrical contact member), the insulating terminal connection housing 5 provided in the housing constituting the fusible link unit, and the cable side terminal portion 3 and the bus bar side terminal portion 4 And a disc spring member 7 that is also used for electrical connection.

  The cable-side terminal portion 3 is a terminal fitting having a conductor crimping portion 8 for crimping a conductor of the cable 2 and an electrical contact portion 9 coupled to the conductor crimping portion 8, and presses a metal plate. For example, it is formed in the illustrated shape. The electrical contact portion 9 is formed with a slit 10 that is cut straight. Stopper portions 11 are respectively formed on the left and right sides of the slit 10 on the notch start side. The pair of stopper portions 11 are formed so as to bend the end portions of the electrical contact portions 9 upward. As will be described later, the pair of stopper portions 11 are formed so as to function as “slip prevention”. A circular through hole may be formed instead of the slit 10. In this case, the formation of the stopper portion 11 is not necessary.

  The bus bar side terminal portion 4 has a flat plate shape and is formed in accordance with the shape of the cable side terminal portion 3. A circular through hole 12 is formed at the center position of the bus bar side terminal portion 4 in the illustrated state. The through hole 12 is formed in accordance with the width of the slit 10 in the cable side terminal portion 3 and in accordance with the position on the notch end side. The bus bar side terminal portion 4 is configured such that the main body of the bus bar exists on the rear end side of the illustrated shape. The main body side of the bus bar is fixed to the housing (not shown) by appropriate means.

  The terminal connection housing 5 is a resin portion as a base member for electrical connection, and is formed to be continuous with the housing. The terminal connection housing 5 is formed in a substantially U-shaped cross-section with an opening at the top and front and rear. Specifically, it has a lower wall 13 and side walls 14 rising from the left and right sides of the lower wall 13 and is formed in a substantially U-shaped cross section.

  In FIG. 2, a pair of ribs 15 and a pair of step portions 16 are formed inside the terminal connection housing 5. In addition, a housing / reversing space 17 for the disc spring member 7 is formed on the inner side. The rib 15 is disposed and formed on the inner surface of the side wall 14 and upward. Further, it is formed so as to protrude straight in the front-rear direction. The upper surface 18 of the rib 15 is formed as a seating surface of the bus bar side terminal portion 4. The lower surface 19 is formed as a seating surface (see FIG. 3) of the disc spring member 7. The step portion 16 is arranged and formed so as to be continuous with the inner surface of the side wall 14 and the lower wall 13. The step portion 16 is disposed and formed at a predetermined interval from the rib 15. The upper surface 20 of the step portion 16 is formed as a seating surface of the disc spring member 7. The step portion 16 is arranged and formed in accordance with a range in which the disc spring member 7 is accommodated. The accommodation / inversion space 17 is formed to be a space that can accommodate insertion of the pin member 6.

  The pin member 6 is a metal part, although not particularly limited, and is formed in a substantially bolt shape. The pin member 6 includes a penetrating pin 21 and a pin head 22 coupled to the penetrating pin 21. The penetration pin 21 is formed in a cylindrical shape having a predetermined length. The through pin 21 is formed as a portion that engages with the disc spring member 7. The pin head 22 is formed in a hexagonal shape in plan view. In addition, although the difference with a volt | bolt is the presence or absence of a screw thread, this invention shall not exclude a volt | bolt.

  The disc spring member 7 is a metal part, although not particularly limited, and is formed so as to function as a disc spring. The disc spring member 7 is formed in a circular shape in plan view, and an engagement hole 23 for the through pin 21 of the pin member 6 is formed through the center. The disc spring member 7 is formed as an inversion portion 25 between the engagement hole 23 and the outer edge portion 24.

  The disc spring member 7 is used in a state in which the center is convex upward before the through pin 21 is engaged. Further, the disc spring member 7 is used in an inverted state of the inversion portion 25, the center of which protrudes downward due to the engagement of the penetrating pin 21. The upward convex corresponds to the first convex direction described in the claims, and the downward convex corresponds to the second convex direction described in the claims. The disc spring member 7 is configured such that the edge of the engaging hole 23 is caught by the through pin 21 when the reversing portion 25 is in the reversing state as shown in FIG.

  In the above configuration and structure, the electrical connection between the cable side terminal portion 3 and the bus bar side terminal portion 4 is such that the cable side terminal portion 3 is at the top and the bus bar side terminal portion 4 is at the bottom as shown in FIG. Are superimposed. In the overlapped state, the bus bar side terminal portion 4 is placed so as to sit against the upper surface 18 of the rib 15 in the terminal connecting housing 5. The disc spring member 7 is accommodated in advance in the accommodating / reversing space 17 of the terminal connecting housing 5, and the accommodating state at this time is accommodated so that the outer edge portion 24 sits on the upper surface 20 of the step portion 16. The disc spring member 7 is accommodated in a state where the center is convex upward (see arrow P), and the engagement hole 23 is formed in the slit 10 of the cable side terminal portion 3 and the through hole 12 of the bus bar side terminal portion 4. It is housed in a state of facing each other.

  Next, when the pin member 6 is inserted from the cable side terminal portion 3 side (see arrow S), the through pin 21 passes through the slit 10 and the through hole 12. On the bus bar side terminal portion 4 side, the penetration pin 21 is engaged while being inserted into the engagement hole 23 of the disc spring member 7. As the disc spring member 7 is engaged with the penetrating pin 21 and the engagement hole 23, the reversing portion 25 is reversed as shown in FIG. 3, and the outer edge portion 24 moves in a direction to sit against the lower surface 19 of the rib 15. The reversal of the reversing portion 25 in the disc spring member 7 acts in a direction in which the connection of the cable side terminal portion 3 and the bus bar side terminal portion 4 in the overlapping state is maintained.

  As described above with reference to FIGS. 1 to 3, the electrical connection between the cable side terminal portion 3 and the bus bar side terminal portion 4 includes the pin member 6 and the disc spring member 7, and the pin member 6. Is completed from the cable side terminal portion 3 side by inverting the disc spring member 7 on the bus bar side terminal portion 4 side. Therefore, since a nut as in the conventional example is not used, there is no need to press-fit or insert the nut, and there is no oblique tightening of the bolt. Further, the disc spring member 7 can be obtained at a lower cost than the nut. Therefore, according to the present invention, it is possible to reduce the number of assembling steps, parts costs and the like as compared with the conventional example.

  According to the present invention, even if a force that slides the cable side terminal portion 3 along the direction in which the slit 10 is formed is applied, the pair of stopper portions 11 are engaged with the pin heads 22 and the connected state is maintained. The Therefore, by forming the stopper portion 11 and the pin head portion 22, there is an effect that even the cable side terminal portion 3 having the slit 10 can contribute to maintaining the connected state.

  Embodiment 2 will be described below with reference to the drawings. FIG. 4 is a diagram showing the electrical connection structure of the present invention, and is a cross-sectional view showing a state immediately before connection. FIG. 5 is a cross-sectional view showing a state after connection. In addition, the same code | symbol is attached | subjected to the same component as the said Example 1, and detailed description is abbreviate | omitted.

  4 and 5, the electrical connection structure 1 ′ includes a conductive cable side terminal portion 3 (first electrical contact member) provided at the end of the cable 2 and a bus bar (not shown) constituting the fusible link unit. Conductive bus bar side terminal portion 4 '(second electrical contact member) provided on the terminal, insulating terminal connection housing 5 provided on the housing constituting the fusible link unit, cable side terminal portion 3 and bus bar A pin member 6 used for electrical connection of the side terminal portion 4 'and a disc spring member 7' used for electrical connection are also provided. Only differences from the first embodiment will be described below.

  The bus bar side terminal portion 4 ′ has a pair of ribs 31 protruding downward. The pair of ribs 31 is formed by cutting and raising, for example, and is disposed at a position sandwiching the through hole 12.

  The disc spring member 7 ′ has a pair of lances 32 that protrude upward with a slight inclination. The pair of lances 32 is formed by cutting and raising, for example, and is disposed on the outer edge portion 24 side in the reversing portion 25. The pair of lances 32 is located outside the pair of ribs 31 and is formed to be slightly longer.

  In the above configuration and structure, the electrical connection between the cable side terminal portion 3 and the bus bar side terminal portion 4 ′ is such that the cable side terminal portion 3 is first and the bus bar side terminal portion 4 ′ is lower as shown in FIG. Overlay these. In the overlapped state, the bus bar side terminal portion 4 ′ is placed so as to sit against the upper surface 18 of the rib 15 in the terminal connection housing 5. The pair of ribs 31 that characterize the second embodiment protrude downward. The disc spring member 7 ′ is accommodated in advance in the accommodating / reversing space 17 of the terminal connecting housing 5, and the accommodating state at this time is accommodated so that the outer edge portion 24 sits on the upper surface 20 of the step portion 16. The disc spring member 7 ′ is accommodated in a state where the center is convex upward (see arrow P), and the engagement hole 23 is a slit 10 in the cable side terminal portion 3 and a through hole in the bus bar side terminal portion 4 ′. 12 is accommodated in a state of facing. The disc spring member 7 ′ is accommodated in a state in which the pair of lances 32 that are characteristic in the second embodiment protrude upward.

  Next, when the pin member 6 is inserted from the cable side terminal portion 3 side (see arrow S), the through pin 21 passes through the slit 10 and the through hole 12. On the bus bar side terminal portion 4 ′ side, the penetration pin 21 is engaged while being inserted through the engagement hole 23 of the disc spring member 7 ′. As the disc spring member 7 ′ is engaged with the through pin 21 and the engagement hole 23, the reversing portion 25 is reversed as shown in FIG. The reversal of the reversing portion 25 in the disc spring member 7 ′ acts in a direction to maintain the connection between the cable side terminal portion 3 and the bus bar side terminal portion 4 ′ in the overlapping state.

  In the second embodiment, when the reversing part 25 is reversed, the distal ends of the pair of lances 32 come into contact with the base ends of the pair of ribs 31. This is due to the fact that the convex direction of the disc spring member 7 'returns to the original convex direction after the reversal, rather than the force when the convex direction of the conical spring member 7' reverses from the first convex direction (upward) to the second convex direction (downward). The purpose is to make the power of the higher.

  When the convex direction of the disc spring member 7 ′ is reversed from the first convex direction (upward) to the second convex direction (downward), the fulcrum is the outer edge 24 of the disc spring member 7 ′ and the upper surface of the step 16. 20 is formed at the contact position. On the other hand, the fulcrum is formed at the base end position of the pair of lances 32 when returning to the original convex direction after the inversion.

  Even if an unintentional pulling force is applied to the pin member 6 for some reason, the electrical connection between the cable side terminal portion 3 and the bus bar side terminal portion 4 ′ is changed by clearly changing the force relationship as described above. Well maintained.

  As described above with reference to FIGS. 4 and 5, according to the present invention, in addition to the effect of the first embodiment, it contributes to maintaining the connection state of the cable side terminal portion 3 and the bus bar side terminal portion 4 ′. There is an effect that can be.

  Embodiment 3 will be described below with reference to the drawings. 6A and 6B are diagrams showing the electrical connection structure of the present invention, where FIG. 6A is an exploded perspective view and FIG. 6B is a perspective view. In addition, the same code | symbol is attached | subjected to the same component as the said Example 1, and detailed description is abbreviate | omitted.

  In FIG. 6, an electrical connection structure 1 ″ is provided at a conductive cable side terminal portion 3 (first electrical contact member) provided at the end of the cable 2 and a bus bar terminal (not shown) constituting the fusible link unit. Conductive bus bar side terminal portion 4 (second electrical contact member), insulating terminal connection housing 5 'provided on the housing constituting the fusible link unit, cable side terminal portion 3 and bus bar side terminal portion 4 comprises a pin member 6 used for electrical connection 4 and a disc spring member 7 also used for electrical connection, and only differences from the first embodiment will be described below.

  The terminal connecting housing 5 ′ has a separation regulating portion 33 on the upper end and the front side of the pair of side walls 14. A pair of separation | spacing control part 33 is formed in the shape of the wall (upper wall) which covers the conductor crimping | compression-bonding part 8 of the cable side terminal part 3 (an arrangement | positioning and a shape shall be an example).

  In the above configuration and structure, the electrical connection between the cable side terminal portion 3 and the bus bar side terminal portion 4 is the same as that in the first embodiment, and the description thereof will be omitted here. In the third embodiment, even if a force that separates the cable-side terminal portion 3 from the bus-bar-side terminal portion 4, that is, a force in the direction of arrow T is applied to the cable 2, the pair of separation regulating portions 33 is connected to the cable-side terminal portion 3 And the separation | separation of the bus-bar side terminal part 4 is controlled. Accordingly, unintentional disconnection of the pin member 6 is restricted, and as a result, the electrical connection between the cable side terminal portion 3 and the bus bar side terminal portion 4 is sufficiently maintained.

  As described above with reference to FIG. 6, according to the present invention, in addition to the effect of the first embodiment, the separation of the cable side terminal portion 3 and the bus bar side terminal portion 4 ′ is regulated to maintain the connection state. The effect that it can contribute is produced.

  It should be noted that the features of the second embodiment may be added to the third embodiment.

  In addition, the present invention can of course be modified in various ways within the scope not changing the gist of the present invention.

1, 1 ', 1 "... electrical connection structure 2 ... cable 3 ... cable side terminal (first electrical contact member)
4, 4 '... Busbar side terminal (second electrical contact member)
5, 5 '... Terminal connection housing (housing)
6 ... Pin member 7, 7 '... Belleville spring member 8 ... Conductor crimping part 9 ... Electrical contact part 10 ... Slit 11 ... Stopper part 12 ... Through hole 13 ... Lower wall 14 ... Side wall 15 ... Rib 16 ... Step part 17 ... Accommodating Reversing space 18: upper surface 19 ... lower surface 20 ... upper surface 21 ... penetrating pin 22 ... pin head 23 ... engagement hole 24 ... outer edge portion 25 ... reversing portion 31 ... rib 32 ... lance 33 ... separation regulating portion

Claims (4)

In the electrical connection structure in which the conductive first electrical contact member and the second electrical contact member are overlapped and electrically connected,
For the connection,
A pin member inserted from the first electrical contact member side and penetrating to the second electrical contact member side;
A disc spring member that engages with the pin member on the second electrical contact member side, and the convex direction is reversed from the first convex direction to the second convex direction by the engagement;
An electrical connection structure comprising: The electrical connection structure according to claim 1,
A rib is formed on the second electrical contact member, and a lance that contacts the rib after the reversal is formed on the disc spring member. The electrical connection structure according to claim 1 or 2,
A slit for the through pin of the pin member is formed in the first electrical contact member, and a stopper portion that can be engaged with the pin head coupled to the through pin is formed on the notch start side of the slit. An electrical connection structure characterized by that. The electrical connection structure according to any one of claims 1 to 3,
An insulating housing is provided as a base member for performing the connection, and a separation regulating portion for regulating separation of the first electrical contact member and the second electrical contact member is formed in the housing. Connection structure.

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