JP2016021311A - Connection structure between bus bar and terminal and bus bar circuit body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a versatile and novel connection structure between a bus bar and a terminal capable of connecting the bus bar with the terminal without need of a terminal of a special shape, and to provide a bus bar circuit body using the connecting structure.SOLUTION: The connection structure between a bus bar 10 and a terminal 12 is obtained by connecting one end 14 of the terminal 12 to the bus bar 10. The bus bar 10 has a cylindrical part 20 formed thereon, and the end 14 of the terminal 12 is press-fitted into the cylindrical part 20. Further, the cylindrical part 20 comprises contact pressure strengthening means for strengthening a contact pressure force onto the press-fitted end 14 of the terminal 12.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a connection structure between a bus bar and a terminal and a bus bar circuit body using the connection structure.

  2. Description of the Related Art Conventionally, printed boards and bus bars with terminals erected are widely used as an internal circuit of an automobile electrical junction box in order to enable connection with external electrical components. In particular, with the recent digitization of automobiles, the demand is increasing.

  By the way, in the case of a printed circuit board, as shown in JP-A-2003-338333 (Patent Document 1), one end of a press-fit terminal as a terminal is press-fitted into a through hole of the printed circuit board, thereby press-fitting. In order to connect the terminal and the printed wiring, the press-fit terminal is held upright on the printed circuit board.

  On the other hand, in the case of a bus bar, it is often used as a bus bar circuit body in which a bus bar configured in a desired circuit shape is mounted on an insulating plate, but the bus bar has a thickness of 0.30 to 0.64 mm and printed. Since it is thinner than the board thickness (about 1.6 mm), the method of providing a through hole in the bus bar and press-fitting one end of the press-fit terminal into the through-hole increases the contact area between the press-fit terminal and the through-hole. There is a problem that it is difficult to maintain a stable electrical connection state and a fixed state, which cannot be secured sufficiently. For this reason, in the case of a bus bar, a tab terminal for enabling connection to an external electrical component is usually formed by bending a predetermined region vertically after punching a conductive metal plate. However, the problem of poor yield was inherent.

  Therefore, as shown in Japanese Patent Application Laid-Open No. 2005-323441 (Patent Document 2), the end of the bus bar is folded and overlapped to increase the thickness of the bus bar, as in the case of a printed circuit board. A structure has been proposed in which one end of a press-fit terminal is press-fitted into a provided through hole.

  However, the method of increasing the plate thickness by folding and overlapping the end portions of the bus bars has a problem that the application location is limited to the end portions of the bus bars. On the other hand, as shown in Japanese Patent Laid-Open No. 2005-174614 (Patent Document 3), there is also a structure in which the depth dimension of the through hole provided in the bus bar is made larger than the plate thickness of the bus bar by burring. In any case, a press-fit terminal is essential as a terminal. Therefore, there is a problem that usable terminals are limited to press-fit terminals and lack versatility. In particular, due to the recent trend toward miniaturization, it is often difficult to form a spring part such as a press-fit terminal. In many cases, the terminal is formed of a metal wire having a small width, etc., and the terminal is not limited to a press-fit terminal. A high bus bar and terminal connection structure was required.

JP 2003-338333 A JP 2005-323441 A JP 2005-174614 A

  The present invention has been made in the background of the above-mentioned circumstances, and the solution to the problem is that the connection between the bus bar and the terminal is possible without the need for a specially shaped terminal. An object is to provide a connection structure between a bus bar and a terminal.

  Another object of the present invention is to provide a bus bar circuit body having a novel structure using such a novel bus bar and terminal connection structure.

  A first aspect of the present invention relating to a connection structure between a bus bar and a terminal is a connection structure between a bus bar and a terminal in which one end portion of the terminal is connected to the bus bar, and the bus bar has a cylindrical portion formed therein. The one end portion of the terminal is press-fitted into the cylindrical portion, and the cylindrical portion is provided with a press-contact force strengthening means for strengthening a press-contact force with respect to the one end portion of the press-fitted terminal. To do.

  According to this aspect, the cylindrical portion formed in the bus bar is pressed against the one end portion of the terminal press-fitted into the cylindrical portion with a high pressure contact force that realizes that the cylindrical portion is pressed with a high pressure contact force. Is provided. Thereby, even if a terminal is not a special terminal which has spring parts, such as a press-fit terminal, sufficient press-contact force with respect to the terminal of a cylindrical part can be ensured by the press-contact force reinforcement means of a cylindrical part. Therefore, a highly versatile bus bar and terminal connection structure in which the type of terminal is not limited can be realized. In addition, since the sufficient pressure contact force between the cylindrical portion of the bus bar and one end portion of the terminal is stably secured by the pressing force strengthening means of the cylindrical portion, the bus bar and the terminal are not required to be soldered. The terminal can be held upright on the bus bar while ensuring good continuity.

  A second aspect of the present invention relating to the connection structure between the bus bar and the terminal is the connection structure between the bus bar and the terminal described in the first aspect. It is divided into a plurality of parts in the circumferential direction of the cylindrical part by a configuration that is smaller than the outer dimension of one end of the terminal and at least two notches provided in positions where the cylindrical part is separated in the circumferential direction. It is comprised including the structure which has.

  In this aspect, since the inner dimension of the cylindrical portion is made smaller than the outer dimension of the one end portion of the terminal, a large pressure contact allowance between the cylindrical portion and the one end portion of the terminal is sufficiently secured. In addition, since the cylindrical portion is divided into a plurality of portions in the circumferential direction of the cylindrical portion by at least two cutout portions provided at positions separated from each other in the circumferential direction, the cylindrical portion is bent and deformed in the axial direction. It is easy to do. As a result, the cylindrical portion elastically deformed outward in the axial direction by press-fitting one end portion of the terminal has a large pressure contact force on the one end portion of the press-fitted terminal due to the restoring force to be elastically restored. Can be pressed. As a result, one end of the terminal is pressed and held on the cylindrical portion, and the terminal and the bus bar can be connected without soldering, and the terminal can be held upright on the bus bar.

  In addition, the inner dimensions of the cylindrical part is made smaller than the outer dimension of one end of the terminal, and a pressure-contact-strengthening means is realized with a simple configuration in which a cutout part is provided to divide the cylindrical part into a plurality of parts in the circumferential direction. Therefore, manufacturing is easy and manufacturing at low cost is possible.

  A third aspect of the present invention relating to the connection structure between the bus bar and the terminal is the connection structure between the bus bar and the terminal described in the first or second aspect, wherein the pressure contact force enhancing means is an inner periphery of the cylindrical portion. It is configured to include a pressure contact rib projecting on the surface.

  In this aspect, since the pressing force strengthening means includes the pressing rib protruding from the inner peripheral surface of the cylindrical portion, the contact reaction force when the one end portion of the terminal comes into contact with the pressing rib. Thus, the tubular portion is firmly pressed against the one end portion of the terminal. As a result, one end of the press-fitted terminal is pressed and held against the cylindrical portion, and it is possible to connect the terminal and the conductive member without soldering and to hold the terminal in an upright state on the conductive member. It has become.

  In addition, since the pressing force strengthening means can be realized by a very simple configuration in which the pressing rib is provided on the inner peripheral surface of the cylindrical portion, it can be easily manufactured and the cost can be reduced.

  According to a fourth aspect of the present invention relating to the connection structure between the bus bar and the terminal, in the connection structure between the bus bar and the terminal described in any one of the first to third aspects, a circumferential surface is formed around the inner peripheral surface of the cylindrical portion. A protrusion extending in the direction is formed, and an engagement recess that is locked to the protrusion is provided at one end of the terminal.

  In this aspect, the protrusion part extended in the circumferential direction is formed in the internal peripheral surface of a cylindrical part, On the other hand, the engaging recessed part latched by a protrusion is provided in the terminal. This makes it possible to stably hold one end of the press-fitted terminal in an axial position with respect to the cylindrical portion, and the insertion / extraction force when the mating terminal is inserted into / removed from the other end of the terminal On the other hand, the terminal can be stably held in the cylindrical portion of the bus bar.

  A first aspect of the present invention relating to a bus bar circuit body is the bus bar circuit body configured to include a first insulating plate and a first bus bar placed on the first insulating plate. Is characterized in that one end of the first terminal is connected using the bus bar and terminal connection structure described in any one of the first to fourth aspects.

  According to this aspect, the first terminal is connected to the first bus bar constituting the bus bar circuit body and held in the standing state by using the bus bar and terminal connection structure described in the first to fourth aspects. Therefore, the yield can be drastically improved as compared with the case where the tab terminals are integrally provided on the bus bar by press punching. In addition, the cylindrical portion formed on the first bus bar is pressed against the one end portion of the first terminal press-fitted into the cylindrical portion with a high pressure contact force. Strengthening means are provided. Thereby, even if the first terminal is not a special terminal having a spring portion such as a press-fit terminal, it is possible to ensure a sufficient pressure contact force with respect to the terminal of the tubular portion by the pressure contact force strengthening means of the tubular portion. it can. Therefore, it is possible to realize a highly versatile bus bar circuit body in which the types of terminals are not limited. In addition, the effect similar to the said aspect 1-4 can be acquired by using the connection structure of a bus-bar and a terminal.

  The second aspect of the present invention relating to the bus bar circuit body is the bus bar circuit body described in the first aspect, wherein a second surface of the first insulating plate on which the first bus bar is placed A through hole through which one end of the terminal is inserted is provided, and an accommodation groove for accommodating the first bus bar is provided, and the first bus bar is accommodated in the accommodation groove. While the surface of the first bus bar is flush with the surface of the first insulating plate, the one end portion of the second terminal is connected to the back side of the first insulating plate. A second bus bar is disposed, and the second bus bar is formed with the cylindrical portion for press-fitting the one end portion of the second terminal inserted through the through hole. For contact of the terminal with the surface of the first insulating plate Ri, in which the insertion end against the tubular portion of the one end portion of the second terminal is adapted to be defined.

  In this aspect, since the cylindrical part which press-fits the one end part of the 2nd terminal is formed also in the 2nd bus bar, it is solderless also to the 2nd terminal like the case of the 1st terminal. The second terminal and the second bus bar can be connected, and the second terminal can be held upright on the second bus bar.

  Moreover, the surface of the first bus bar is flush with the surface of the insulating plate by accommodating the first bus bar in the accommodating groove, and the second terminal is brought into contact with the surface of the first insulating plate. The insertion end of the one end portion of the second terminal with respect to the cylindrical portion is predetermined. Therefore, even when the first terminal and the second terminal are connected to bus bars of different layers, the first terminal protruding from the surface of the first bus bar and the second terminal protruding from the surface of the first insulating plate. The protruding dimensions of the terminals can be made the same, and the first terminal and the second terminal can be shared.

  Note that the second bus bar superimposed on the back surface side of the first insulating plate does not necessarily have to be directly superimposed on the back surface of the first insulating plate. Insulation on which one or more bus bars are placed. The case where it overlaps indirectly via a board is also included. In that case, the one or more insulating plates and / or bus bars interposed between the first insulating plate and the second bus bar are provided with through-holes that allow insertion of one end of the second terminal. Should be understood.

  According to a third aspect of the present invention relating to the bus bar circuit body, in the bus bar circuit body described in the first or second aspect, the tube of the first bus bar is formed on the surface of the first insulating plate. An insertion hole is inserted therethrough, and a third bus bar to which the one end of the first terminal is connected is disposed on the back side of the first insulating plate. The third bus bar is formed with the cylindrical portion for press-fitting the one end portion of the first terminal inserted through the insertion hole.

  In this aspect, since the cylindrical part which press-fits the one end part of the 1st terminal is formed also in the 3rd bus bar, the 1st terminal part of the 1st terminal is not only the 1st bus bar but the 3rd bus bar. Therefore, it is possible to connect the first bus bar and the third bus bar in a solderless manner.

  Note that the third bus bar superimposed on the back surface side of the first insulating plate does not necessarily have to be directly superimposed on the back surface of the first insulating plate, and the insulation on which one or more bus bars are placed. The case where it overlaps indirectly via a board is also included. In that case, the one or more insulating plates and / or bus bars interposed between the first insulating plate and the third bus bar are provided with through-holes that allow insertion of one end of the second terminal. Should be understood. Further, the second bus bar and the third bus bar may be supported by the same insulating plate (for example, the second insulating plate), or separate insulating plates (for example, the second and third insulating plates). It may be supported by. In addition, when the second bus bar and the third bus bar are supported by the same insulating plate, the second bus bar and the third bus bar may be integrally connected.

  According to the present invention, the cylindrical portion of the bus bar is provided with the pressure-contact-strengthening means that realizes that the cylindrical portion is pressed against the one end portion of the terminal press-fitted into the cylindrical portion with a high pressure-contact force. ing. Therefore, even if the terminal is not a special terminal having a spring portion such as a press-fit terminal, a sufficient pressure contact force with respect to the terminal of the tubular portion can be secured by the pressure contact force strengthening means of the tubular portion. Therefore, it is possible to realize a highly versatile bus bar and terminal connection structure in which the types of terminals are not limited. In addition, since a sufficient pressure contact force with respect to the terminal of the cylindrical portion can be secured, the terminal can be held upright on the bus bar while ensuring good electrical connection between the bus bar and the terminal without the need for soldering. .

BRIEF DESCRIPTION OF THE DRAWINGS The whole perspective view which shows the bus-bar circuit body by which the one end part of various terminals is connected to a predetermined | prescribed bus bar using the connection structure of the bus bar and terminal as 1st embodiment of this invention. The disassembled perspective view of the bus-bar circuit body shown in FIG. The A section enlarged view of FIG. FIG. 4 is an enlarged perspective view of a first bus bar shown in FIG. 3. The perspective view seen from the downward direction of the 1st bus bar shown in FIG. The lower surface enlarged view of the 1st bus bar shown in FIG. The B section enlarged view of FIG. The C section enlarged view of FIG. The top view which shows the connection structure of the bus-bar and a terminal as 2nd embodiment of this invention. The bottom view of the connection structure of the bus bar and terminal shown in FIG. The cross-sectional perspective view which shows the connection structure of the bus-bar and a terminal as 3rd embodiment of this invention. The perspective view which shows the connection structure of the bus-bar and a terminal as a modification of 1st embodiment of this invention. The perspective view seen from the downward direction of the connection structure of the bus-bar and terminal shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, FIGS. 1 to 8 show a bus bar circuit body 16 in which one end portion 14 of a terminal 12 is connected to the bus bar 10 using the connection structure of the bus bar 10 and the terminal 12 according to the first embodiment of the present invention. ing. In order to facilitate understanding, one end portion 14 of the terminal 12 is indicated by a virtual line in FIG. Further, in the following description, “upper” refers to the upper side in FIG. 2, “lower” refers to the lower side in FIG. 2, “front side” refers to the left side in FIG. 2, and “rear side” refers to the right side in FIG. Say it.

  As shown in FIG. 1 and FIG. 2, the bus bar circuit body 16 includes four layers of bus bars 10, that is, the first bus bar 10a, the second bus bar 10b, the third bus bar 10c, and the fourth bus bar from the top. Between 10d, it has a structure in which three layers of insulating plates 18, that is, a first insulating plate 18a, a second insulating plate 18b, and a third insulating plate 18c are sandwiched from above. Then, tab-like terminals 12a, 12b and tuning-fork-like terminals 12c are inserted into the laminated body in which the four layers of bus bars 10 and the three layers of insulating plates 18 are laminated from the upper side or the lower side. The bus bar circuit body 16 is configured by being connected to 10a, 10b, 10c, and 10d.

  As shown in FIG. 2, all of the bus bars 10a, 10b, 10c, and 10d are formed by press punching a conductive metal plate, while the end portions of the bus bars 10a, 10b, 10c, and 10d, etc. Are provided with a cylindrical portion 20 formed by a known processing technique such as burring or deep drawing. As shown in FIGS. 3 to 6, the cylindrical portion 20 has a substantially rectangular cylindrical shape, while the four corners spaced at regular intervals in the circumferential direction of the cylindrical portion 20 include: A notch 22 formed by notching the corner part over the entire length in the vertical direction is provided. And the cylindrical part 20 is divided | segmented into four by the notch part 22 in the circumferential direction.

  Further, as shown in FIG. 2, the insulating plates 18a, 18b, and 18c are all substantially rectangular flat plates, and are formed of a known synthetic resin material having insulating properties. A housing groove 26 for receiving the bus bars 10a, 10b, 10c is provided on the surface 24 of the insulating plates 18a, 18b, 18c, and the bus bars 10a, 10b, 10c are formed in the housing grooves 26 of the insulating plates 18a, 18b, 18c, respectively. In the accommodated state, the surfaces 28 of the bus bars 10a, 10b, 10c are formed to be flush with the surfaces 24 of the insulating plates 18a, 18b, 18c, respectively. In addition, through-holes 30 having substantially circular cross-sectional shapes through which the cylindrical portions 20 of the bus bars 10a, 10b, and 10c are inserted are respectively provided in the receiving grooves 26 provided on the surface 24 of the insulating plates 18a, 18b, and 18c. Has been. Furthermore, a through hole 32 having a substantially circular cross-sectional shape is inserted through the surface 24 of each of the insulating plates 18a, 18b, 18c. In addition, the back surface 34 of the insulating plates 18a and 18c is also provided with a housing groove (not shown) for housing a part of the bus bars 10b and 10d (disposed behind in FIG. 2).

  The tab-shaped terminals 12a, 12b and the one end portions 14a, 14b, 14c of the tuning-fork-shaped terminal 12c are all formed into the same shape of lead portions protruding downward in a narrow flat plate shape. As shown in FIG. 6, the inner dimension L1 of the cylindrical portion 20 provided in the bus bars 10a, 10b, 10c is the one end portion 14a, 14b, 14c of the terminals 12a, 12b, 12c. External dimension: formed to be smaller than L2. On the other hand, as shown in FIG. 1, connection portions are formed on the other end sides 36a and 36b of the terminals 12a and 12b. For example, they are inserted into a connector housing (not shown) to function as connector terminal fittings. A connector connection terminal portion 40 is configured. Further, a tuning fork-like connection portion is formed on the other end side 36c of the terminal 12c. For example, a fuse connection terminal portion 42 for inserting and connecting a connection portion of an electric component such as a fuse (not shown) is formed. Yes. The terminal 12a is formed by cutting a wire rod having a certain substantially square cross-sectional shape, which is formed of, for example, a copper alloy such as tough pitch copper or brass, iron, or the like into a predetermined length. A plating layer is applied over the entire surface. In addition, a pair of abutting portions 44, 44 formed by crushing is provided in the central portion of the terminal 12a in the length direction (see FIG. 3). Note that the pair of contact portions 44, 44 constitute a stepped surface that protrudes on both sides in the direction orthogonal to the length direction of the terminal 12a and spreads orthogonally to the length direction. On the other hand, the terminals 12b and 12c are formed, for example, by stamping a metal plate having a surface such as a copper plate plated with tin. In addition, a pair of stepped surfaces that protrude from both ends of the terminals 12b and 12c in the direction orthogonal to the length direction of the terminals 12b and 12c and extend in a direction perpendicular to the length direction are also formed on the base ends of the one end portions 14b and 14c of the terminals 12b and 12c Contact portions 44 are provided (see FIG. 7).

  The terminals 12 a, 12 b, and 12 c having such a structure include a first terminal 46 and a second terminal 48. As shown in FIG. 2, the first terminal 46 has a tube of the first bus bar 10a in which one end portions 14a, 14b, and 14c are received and placed in the receiving groove 26 of the first insulating plate 18a. The first terminal 46 is connected to the first bus bar 10a by being press-fitted into the shaped portion 20. Here, the amount of insertion of the one end portions 14a, 14b, 14c of the first terminal 46 into the cylindrical portion 20 is such that the pair of contact portions 44, 44 are in contact with the surface 28 of the first bus bar 10a. It comes to be prescribed by this. That is, the one end portions 14a, 14b, 14c of the first terminal 46 are positioned in the axial direction of the tubular portion 20 by the pair of contact portions 44, 44 being in contact with the surface 28 of the first bus bar 10a. In addition, the inclination of the first terminal 46 with respect to the surface 28 of the bus bar 10a is prevented. As shown in FIG. 2, one end portions 14a, 14b, and 14c of the first terminal 46 inserted through the tubular portion 20 of the first bus bar 10a penetrate through the insulating plates 18a, 18b, and 18c. The insertion hole 30 is inserted and arranged.

  On the other hand, one end portions 14a, 14b, and 14c of the second terminal 48 are inserted through the through holes 32 provided in the front surface 24 of the first insulating plate 18a, and the back surface 34 side of the first insulating plate 18a. Is press-fitted into the cylindrical portion 20 of the second bus bar 10b. Thus, the second terminal 48 is connected to the second bus bar 10b. Here, the amount of insertion of the one end portions 14a, 14b, 14c of the second terminal 48 into the cylindrical portion 20 is such that the pair of contact portions 44, 44 are in contact with the surface 24 of the first insulating plate 18a. Further, the inclination of the second terminal 48 with respect to the surface 24 of the first insulating plate 18a is prevented.

  In addition, after the one end portion 14c of the first terminal 46 is press-fitted into the cylindrical portion 20 of the first bus bar 10a, the insertion hole 30 of the first insulating plate 18a or the through hole 32 of the second insulating plate 18b. Is inserted into the cylindrical portion 20 of the third bus bar 10c disposed on the back surface 34 side of the first insulating plate 18a. Thereby, since the 1st terminal 46 is connected to the 3rd bus bar 10c, as a result, the 1st bus bar 10a and the 3rd bus bar 10c are connected.

  According to the bus bar circuit body 16 having such a structure, the cylindrical portion 20 of the bus bar 10 is divided into four in the circumferential direction of the cylindrical portion 20 by the four cutout portions 22. The portion 20 is easily bent and deformed in the direction perpendicular to the axis. Further, the inner dimension L1 of the cylindrical portion 20 is formed so as to be smaller than the outer dimension L2 of the one end portion 14 of the terminal 12, so that the cylindrical portion 20 and the one end portion 14 of the terminal 12 are formed. A large pressure contact allowance is sufficiently secured. Therefore, the one end portion 14 of the press-fitted terminal 12 is caused by the restoring force of the tubular portion 20 elastically deformed outward in the axial direction by the press-fitting of the one end portion 14 of the terminal 12. Can be pressed with a large pressing force. Therefore, even if the terminal 12 is not a special terminal having a spring portion such as a press-fit terminal, a sufficient pressure contact force between the cylindrical portion 20 of the bus bar 10 and the one end portion 14 of the terminal 12 is stably secured. The terminal 12 can be held upright on the bus bar 10 while ensuring good electrical connection between the bus bar 10 and the terminal 12 without soldering. In addition, the inner dimension L1 of the cylindrical portion 20 is made smaller than the outer dimension L2 of the one end portion 14 of the terminal 12, and the cylindrical portion 20 is divided in the circumferential direction by the notch 22 so as to be pressed. A force strengthening means can be realized and manufacturing can be performed easily and at low cost.

  Further, since the first terminal 46 is connected to the first bus bar 10a constituting the bus bar circuit body 16 and is held in an upright state, the tab terminal is integrated with the bus bar 10 by a conventional press punching process. Compared with the case where it is provided, the yield can be drastically improved. In addition, since the cylindrical portion 20 is formed also in the second bus bar 10b and the one end portion 14 of the second terminal 48 can be press-fitted, the second terminal 48 is also solderless. Connection to the second bus bar 10b can be achieved and the second bus bar 10b can be held upright on the second bus bar 10b. Moreover, since the cylindrical portion 20 is formed also in the third bus bar 10c and the one end portion 14 of the first terminal 46 can be press-fitted, only the first bus bar 10a is connected to the first terminal 46. Since it can also be connected to the third bus bar 10c, the first bus bar 10a and the third bus bar 10c can be connected without soldering.

  Further, since the bus bar 10 is accommodated in the accommodating groove 26 so that the surface 28 of the bus bar 10 is flush with the surface 24 of the insulating plate 18, the bus bar 10 is mounted on the surface 28 of the first bus bar 10a. Since the protruding dimensions of the first terminal 46 placed and the second terminal 48 placed on the surface 24 of the first insulating plate 18a can be the same, the first terminal 46 and the second terminal 48 can be shared.

  Next, the connection structure between the bus bar 10 and the terminal 12 as the second embodiment of the present embodiment will be described in detail with reference to FIGS. 9 and 10, but the members and parts having the same structure as the above embodiment In the figure, the same reference numerals as those in the above embodiment are attached, and detailed description thereof is omitted. In the present embodiment, an embodiment different from the above-described embodiment is shown in that the press-contact force strengthening means includes a press-contact rib 54 that protrudes from the inner peripheral surface 52 of the tubular portion 50. . In order to facilitate understanding, one end portion 14 of the terminal 12 is indicated by a virtual line in FIGS. 9 and 10.

  More specifically, the press-contact rib 54 has a substantially semicircular cross section over a substantially entire length in the axial direction at the central portion in the circumferential direction of the four surfaces constituting the inner peripheral surface 52 of the cylindrical portion 50 having a substantially rectangular cylindrical shape. Projected in shape. Further, the distance L1 between the opposing press-contact ribs 54 corresponding to the inner dimension of the cylindrical portion 20 is formed to be smaller than the outer dimension L2 of the one end portion 14 of the terminal 12. As a result, the cylindrical portion 50 is firmly pressed against the one end portion 14 of the terminal 12 by the contact reaction force when the one end portion 14 of the terminal 12 is in contact with the press contact rib 54. And the terminal 12 can be held upright on the bus bar 10. In addition, since the pressing force strengthening means can be realized by a very simple configuration in which the pressing ribs 54 are provided on the inner peripheral surface 52 of the cylindrical portion 50, it can be easily manufactured and the cost can be reduced.

  Next, the connection structure between the bus bar 10 and the terminal 56 according to the third embodiment of the present embodiment will be described in detail with reference to FIG. 11. With regard to members and parts having the same structure as the above embodiment, In the figure, the same reference numerals as those in the above embodiment are attached, and detailed description thereof is omitted. In the present embodiment, a projecting portion 60 extending in the circumferential direction is formed on the inner peripheral surface 52 of the tubular portion 58, and an engaging recess 62 that is locked to the projecting portion 60 is provided at one end portion 14 of the terminal 56. In this regard, an embodiment different from the first embodiment is shown.

  More specifically, as in the first embodiment, a protrusion that extends in the circumferential direction with a substantially semicircular cross-sectional shape newly with respect to the inner peripheral surface 52 of the cylindrical portion 58 divided into four by the notch 22. On the other hand, an engagement recess 62 that is locked to the protrusion 60 is provided at one end portion 14 of the terminal 56 over the entire circumference in a substantially semicircular cross-sectional shape. This makes it possible to stably hold the one end portion 14 of the press-fit terminal 56 in the axially positioned state with respect to the cylindrical portion 58, so that the other terminal (not shown) of the terminal 56 is inserted and removed. The terminal 56 can be stably held in the cylindrical portion 58 against the insertion / extraction force at the time of cutting. In addition, this embodiment has the same structure as that of the first embodiment except that the projecting portion 60 is provided on the cylindrical portion 58 and the engaging recess 62 is provided on the one end portion 14 of the terminal 56. Therefore, the same effects as those of the first embodiment based on the same structure as those of the first embodiment can be obtained.

  As mentioned above, although several embodiment of this invention has been described, this is an illustration to the last, Comprising: This invention is not limited at all by the specific description in this embodiment. For example, in the first embodiment, the cylindrical portion 20 has a rectangular shape in plan view, but is divided into four by four cutout portions 22 that are equally spaced in the circumferential direction. As shown in FIGS. 12 and 13, the cylindrical portion 64 may be circular in a plan view, or divided into two by two notches 22 that are equally spaced in the circumferential direction. May be. Furthermore, the cylindrical part 64 may have an arbitrary shape such as a polygonal shape or an elliptical shape in plan view, and the notches 22 that divide the cylindrical part 64 are spaced apart from each other in the circumferential direction. It may be provided so that three, or five or more may be provided.

  In addition, in the second embodiment, the cylindrical portion 50 is not divided by the notch portion 22, but even if the cylindrical portion 50 is divided by the notch portion 22 as in the first embodiment. Of course.

  Furthermore, the second bus bar 10b to which the second terminal 48 is connected does not necessarily have to be directly superimposed on the back surface 34 of the first insulating plate 18a, and one or a plurality of bus bars 10 are placed. The case where it overlaps indirectly via the insulating board 18 is also included. In that case, the one or more bus bars 10 and / or the insulating plate 18 interposed between the first insulating plate 18a and the second bus bar 10b are inserted into the one end portion 14 of the second terminal 48. It is assumed that an allowable through hole is provided.

  In addition, the third bus bar 10c to which the first terminal 46 is connected may be directly superimposed on the back surface 34 of the first insulating plate 18a, or one or more bus bars 10 are placed. The case where it overlaps indirectly via the insulating board 18 is also included. In that case, the one or more bus bars 10 and / or the insulating plate 18 interposed between the first insulating plate 18a and the third bus bar 10c are inserted into the one end portion 14 of the first terminal 46. It is assumed that an allowable through hole is provided. Further, the second bus bar 10b and the third bus bar 10c may be supported by the same insulating plate 18 (for example, the second insulating plate 18b), or separate insulating plates 18 (for example, the second and second insulating plates 18b). 3 insulating plates 18b, 18c). Further, when the second bus bar 10b and the third bus bar 10c are supported by the same insulating plate 18, the second bus bar 10b and the third bus bar 10c may be integrally connected.

10: bus bar, 10a: first bus bar, 10b: second bus bar, 10c: third bus bar, 12, 12a-c, 56: terminal, 14, 14a-c: one end, 16: bus bar circuit body, 18: insulating plate, 18a: first insulating plate, 20, 50, 58: cylindrical portion, 22: notch, 24: surface (insulating plate), 26: receiving groove, 28: surface (bus bar), 30: Insertion hole, 32: through hole, 34: back surface (insulating plate), 46: first terminal, 48: second terminal, 52: inner peripheral surface, 54: pressure contact rib, 60: protrusion, 62: engagement Recess

Claims (7)

A bus bar and terminal connection structure in which one end of a terminal is connected to a bus bar,
The bus bar has a cylindrical portion, and one end of the terminal is press-fitted into the cylindrical portion,
A connection structure between a bus bar and a terminal, characterized in that the tubular portion includes a pressing force reinforcing means for reinforcing a pressing force with respect to one end of the press-fitted terminal.   The pressure-contact-strengthening means is configured such that the inner dimension of the cylindrical portion is smaller than the outer dimension of the one end portion of the terminal, and at least 2 provided at a position where the cylindrical portion is separated in the circumferential direction. The bus bar and terminal connection structure according to claim 1, including a configuration in which a plurality of notches are divided into a plurality of portions in the circumferential direction of the cylindrical portion.   The bus bar and terminal connection structure according to claim 1, wherein the press contact force strengthening means includes a press contact rib protruding from an inner peripheral surface of the cylindrical portion.   The protrusion part extended in the circumferential direction is formed in the internal peripheral surface of the said cylindrical part, The engagement recessed part latched by this protrusion is provided in the one end part of the said terminal. The connection structure of the bus bar and the terminal according to claim 1. In a bus bar circuit body configured to include a first insulating plate and a first bus bar placed on the first insulating plate,
A bus bar circuit, wherein one end of a first terminal is connected to the first bus bar using the bus bar-terminal connection structure according to any one of claims 1 to 4. body. In the first insulating plate, a surface of the first bus bar on which the first bus bar is placed is provided with a through hole that passes through one end of the second terminal, and the first bus bar is accommodated in the first insulating plate. A groove is provided, and the surface of the first bus bar is flush with the surface of the first insulating plate in a state where the first bus bar is housed in the housing groove,
A second bus bar to which the one end of the second terminal is connected is disposed on the back side of the first insulating plate, and the through hole is inserted through the second bus bar. The cylindrical portion that press-fits the one end portion of the second terminal is formed, and the one end portion of the second terminal is brought into contact with the surface of the first insulating plate of the second terminal. The bus bar circuit body according to claim 5, wherein an insertion end for the cylindrical portion is defined. While the surface of the first insulating plate has an insertion hole through which the cylindrical portion of the first bus bar is inserted,
A third bus bar to which the one end of the first terminal is connected is disposed on the back side of the first insulating plate, and the third bus bar is inserted through the insertion hole. The bus bar circuit body according to claim 5 or 6, wherein the cylindrical portion for press-fitting the one end portion of the first terminal is formed.

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