JP5809848B2 - Connection structure between electric device and electric wire terminal, and electric connection box - Google Patents

Description

  The present invention relates to a connection structure between an electric device and a wire terminal, and an electric connection box.

  As an electric device mounted on a vehicle such as an automobile, for example, an electric junction box is exemplified. The electric junction box is known as a generic term for a relay box, a fuse box, a junction block, an electronic control unit box, or the like.

  In FIG. 12, the fuse box 1 of the electrical connection box is configured to include an insulating housing 2. In addition, as disclosed technology related to the fuse box 1, for example, the following Patent Document 1 is cited as an example.

  A cavity 3 is formed in the housing 2 constituting the fuse box 1. The cavity 3 is formed for mounting the fusible link 4 for large current. A nut 5 is provided below the cavity 3. The nut 5 is fixed at a predetermined position of the housing 2. The fusible link 4 has a pair of terminals that are leg-shaped conductive plate portions. Bolt insertion holes are respectively formed in the pair of terminals. When the fusible link 4 is mounted in the cavity 3, the bolt insertion hole of the terminal is aligned with the position of the nut 5 fixed to the housing 2. The terminal is fastened and fixed by a nut 5 and a bolt 6.

  When electrical connection is made to the fuse box 1, an electric wire 7 is used. The terminal of the electric wire 7 is provided with a bolt fastening terminal 8 (round electric wire terminal terminal, specifically, an LA terminal). When connecting the bolt fastening terminal 8 to the fuse box 1, first the bolt fastening terminal 8 is overlapped with the terminal 9 (see FIG. 13) of the fusible link 4, and then the bolt is inserted into the bolt insertion hole of each terminal. The work of tightening and fixing while inserting 6 is necessary.

Japanese Patent Laid-Open No. 10-92484

  In the prior art of FIG. 12, since the operator holds the electric wire 7 and performs the tightening operation of the bolt 6 in this state, the bolt tightening terminal 8 is inclined (inclined) during the operation. In this case, as shown in FIG. 13, the bolt fastening terminal 8 is caught by the screw thread 10, and there is a possibility that a connection failure may occur if the final fastening is performed in this state.

  For example, when the bolt 6 is finally tightened by using an electric tool, even if the bolt fastening terminal 8 is hooked on the screw thread 10 and is in an oblique state, the set torque value is output. Therefore, if the operator determines the tightening state based only on the torque value, a connection failure will occur.

  The bolted terminal 8 is naturally rattled when the hook with the screw thread 10 is released by vibration or the like, and this causes a connection failure.

  The present invention has been made in view of the above-described circumstances, and has a structure capable of preventing poor connection, and a connection structure between an electric device and a wire terminal terminal, and an electric circuit employing such a structure. It is an object to provide a connection box.

In order to solve the above-mentioned problems, the connection structure between the electric device according to the present invention and the wire terminal terminal according to the present invention includes a housing, a nut provided in the housing, and a nut as a configuration of the electric device. A bolt, a conductive plate having a bolt insertion portion, and a terminal conversion block fastened and fixed by the nut and the bolt together with the conductive plate, the terminal conversion block including a conductive block bus bar. , the block bus bars have a wire-side electrical contact portion on the other end and having a busbar-side bolt insertion portion at one end,
The housing includes a guide portion that guides to a predetermined fixed position by sliding, and the terminal conversion block further includes an insulating block housing guided by the guide portion, and the block housing includes the electric wire side electric It has a terminal insertion connection part which accommodates and locks an electric wire terminal terminal to the electric wire side electric contact part while accommodating a contact part .

According to this invention which has such a characteristic, it becomes a connection structure of an electric equipment provided with a terminal conversion block, and an electric wire terminal terminal. The terminal conversion block is a member that is fastened and fixed by a nut and a bolt together with the conductive plate portion, and the terminal conversion block may be used for electrical connection to the electrical equipment. In the terminal conversion block, the wire terminal is connected to the electric wire side electrical contact portion. The connection portion between the electric wire side electrical contact portion and the electric wire terminal terminal can adopt a structure that does not need to be bolted, and a connection that causes an oblique state of the electric wire terminal terminal is prevented.
According to the present invention, the block housing of the terminal conversion block is guided to the predetermined fixed position by the guide portion of the housing. The terminal conversion block has a terminal insertion connecting portion. When the wire terminal is inserted into the terminal insertion connecting portion, the wire end terminal is electrically connected to the electric contact portion on the wire side of the block bus bar and locked. Is done.

According to a second aspect of the present invention, there is provided a connection structure between the electric device and the electric wire terminal terminal according to the first aspect of the present invention, wherein the block housing includes a bus bar insertion portion and the bus bar. The block bus bar has a locked part between the bus bar side bolt insertion part and the electric wire side electrical contact part.

  According to the present invention having such a feature, when the block bus bar is inserted into the bus bar insertion portion of the block housing and the lock portion and the locked portion are locked, the assembly of the terminal conversion block itself is completed.

Moreover, the electrical junction box of the present invention according to claim 3, which has been made to solve the above-described problems, employs a connection structure between the electrical device according to claim 1 or 2 and an electric wire terminal terminal. And

  According to this invention which has such a characteristic, it becomes an electrical junction box provided with a terminal conversion block. The electric junction box can be connected to the electric wire terminal terminal without any inclination by the terminal conversion block.

  According to the first aspect of the present invention, by providing the terminal conversion block, it is possible to connect the wire terminal terminals without inclination. Therefore, there is an effect that connection failure can be prevented.

According to the second aspect of the present invention, in addition to the above effects, there is an effect that a terminal conversion block with high productivity can be obtained.

According to the third aspect of the present invention, it is possible to provide a better electrical junction box.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure of the electrical-connection box which employ | adopts the connection structure which concerns on this invention, (a) is a perspective view of the whole electrical-connection box before connecting an electric wire terminal terminal, (b) is a front view of a connection structure part. is there. It is a perspective view of the whole electric junction box after connecting an electric wire terminal terminal. It is the sectional view on the AA line of FIG. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, (a) is a cross-sectional view on the electric junction box body side, and (b) is a cross-sectional view on the terminal conversion block side. It is a perspective view of a terminal conversion block. It is a disassembled perspective view of a terminal conversion block. It is sectional drawing at the time of the attachment start of a terminal conversion block. It is sectional drawing in the middle of attachment of a terminal conversion block. It is sectional drawing at the time of completion of attachment of a terminal conversion block. It is a perspective view at the time of the attachment start of a terminal conversion block. It is a perspective view in the middle of attachment of a terminal conversion block. It is a perspective view of the fuse box of a prior art example. It is a perspective view which shows the state which the bolting terminal of FIG. 12 hooked on the screw thread and became diagonal.

  The connection structure between the electric device and the electric wire terminal terminal includes a terminal conversion block that is fastened and fixed to the electric device together with the conductive plate portion with a nut and a bolt, and the electric wire terminal terminal is connected via the terminal conversion block. To do. As the electrical equipment, an electrical connection box such as a fuse box is suitable.

  Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is a perspective view and a front view of an electrical junction box employing the connection structure according to the present invention. Moreover, FIG. 2 is a perspective view of the whole electrical junction box after connecting the wire terminal terminals. 3 and 4 are cross-sectional views taken along the line AA of FIG. 1, FIGS. 5 and 6 are perspective views and exploded perspective views of the terminal conversion block, and FIGS. 7 to 11 are cross-sectional views related to attachment of the terminal conversion block. FIG.

  In the following description, specific shapes, materials, numerical values, directions, and the like are examples for facilitating the understanding of the present invention, and can be appropriately changed according to use, purpose, specifications, and the like. To do.

  1 and 2, reference numeral 21 indicates a fuse box (electric equipment, electrical connection box) mounted on a vehicle such as an automobile. The fuse box 21 is electrically connected to a load or a power source (not shown) using an electric wire 22. The fuse box 21 includes various fuses such as a fusible link 23, a fuse box main body 24, and a terminal conversion block 25.

  The fuse box 21 includes a terminal conversion block 25 so that electrical connection with a load or a power source (not shown) can be facilitated. Specifically, the electrical connection can be completed without inclination simply by inserting the terminal 26 (wire terminal) of the terminal of the electric wire 22 into the terminal conversion block 25. In addition, the fuse box 21 includes a terminal conversion block 25 so that productivity and reliability can be improved, and cost can be reduced.

  First, each member and the electric wires 22 constituting the fuse box 21 will be described.

  The fusible link 23 is a fuse for a large current, and a known one is used. The fusible link 23 has a pair of fuse terminals 27 (see FIG. 7). The fuse terminal 27 is a portion corresponding to the conductive plate portion recited in the claims, has conductivity, and is formed in a rectangular plate shape. A bolt insertion hole 28 (see FIG. 7) is formed in the fuse terminal 27. The bolt insertion hole 28 is formed in a shape that becomes a circular through hole. In addition, U-shaped shape is mentioned as shapes other than a circle, and this is good also as a bolt insertion part.

  The fuse box body 24 includes a housing 29, a bus bar 30, bolts 31 and nuts 32. In the description of the fuse box body 24, the arrow P in the figure is defined as the up-down direction, the arrow Q is defined as the left-right direction, and the arrow R is defined as the front-rear direction.

  1 to 4 and 7, the housing 29 is provided as a substantially box-shaped resin part having insulation properties. The housing 29 has a plurality of cavities for the fuse on the upper surface side. Reference numeral 33 indicates a cavity for the fusible link 23.

  In the bottom portion of the cavity 33, terminal insertion portions (reference numerals omitted) for the pair of fuse terminals 27 of the fusible link 23 are formed penetratingly formed. Corresponding fuse terminals 27 are respectively inserted into the pair of terminal insertion portions. A partition wall 34 (see FIGS. 3, 4, and 7) extending straight downward is formed between the pair of terminal insertion portions.

  Nut fixing portions 35 are formed in front and rear of the partition wall 34, respectively. The nut fixing part 35 is formed as a part for fixing the nut 32. A guide portion 36 is coupled to each nut fixing portion 35. The guide portion 36 is formed as a portion that guides the nut 32 to the nut fixing portion 35 by sliding. The guide part 36 is formed so as to extend straight downward from the nut fixing part 35. The lower end of the guide part 36 is formed so as to open.

  The nut 32 includes a substrate portion 37 guided by the guide portion 36 and a cylindrical portion 38 that is integrated with the substrate portion 37. The substrate portion 37 is a plate-like portion having a plurality of corners on the periphery, and the corners engage with the nut fixing portion 35. By this engagement, the nut 32 is prevented from rotating. A thread groove is formed on the inner surface of the cylindrical portion 38.

  In front and rear of the nut fixing portion 35 and the guide portion 36, window portions 39 that are largely opened at the front and rear surface positions of the housing 29 are formed, respectively. The window portion 39 is formed so as to face the cylindrical portion 38 of the nut 32. A partition 40 is also formed as a part facing the window 39.

  A frame portion 41 having a frame shape is formed between a portion where the cylindrical portion 38 of the nut 32 slides upward from below and a proximal end portion of the partition wall 40. The groove-shaped guide portion 36 is arranged and formed inside the frame portion 41.

  A plurality of the cavities 33 are formed in a line in the left-right direction according to the number of the fusible links 23 attached. Therefore, the partition wall 34, the nut fixing portion 35, the guide portion 36, the partition wall 40, and the frame portion 41 are formed according to the number of cavities 33.

  The bus bar 30 is formed by pressing a conductive metal plate. The bus bar 30 is formed so that power can be distributed. Although not particularly illustrated, the bus bar 30 is formed with a plurality of tab-shaped terminals, tuning-fork-shaped terminals, and the like. In addition, a bolt insertion hole 42 is formed in the bus bar 30 according to the cylindrical portion 38 of the nut 32. A portion where the bolt insertion hole 42 is formed is formed so that the fuse terminal 27 can be sandwiched between the bolt insertion hole 42 and the cylindrical portion 38 of the nut 32. The bus bar 30 may be a member corresponding to the conductive plate portion described in the claims, like the fuse terminal 27.

  The bolt 31 is a known tightening part that is screwed onto the nut 32, and has a hexagonal head 43 and a shaft 44 on which a thread is formed (see FIG. 9). The bolt 31 has conventionally been a part for fastening the bolt fastening terminal 8 (see FIGS. 12 and 13) of the electric wire terminal, but is used as a part for fixing the terminal conversion block 25 in the present invention.

  The terminal conversion block 25 is a member that is particularly effective when the manufacture of the fuse box 21 and the electrical connection with the electric wire 22 are performed in separate steps. In this embodiment, the terminal conversion block 25 is composed of a block bus bar 45 and a block housing. 46 and two parts.

  In FIGS. 5 and 6 (refer to FIGS. 1 to 4 and 7 as needed), the block bus bar 45 is provided as a metal part formed by pressing a conductive metal plate. ing. The block housing 46 is provided as a resin molded part having insulation properties. The block bus bar 45 and the block housing 46 have a structure that can be easily assembled as will be understood from the following description. (In this embodiment, the block bus bar 45 and the block housing 46 are integrally assembled with a fitting structure. It may be integrated by molding).

  The block bus bar 45 has a substantially band shape, and has a bus bar side bolt insertion hole 47 (bus bar side bolt insertion portion) on one end side and an electric contact portion 48 on the other end side. Further, a locked portion 49 is provided between the bus bar side bolt insertion hole 47 and the electrical contact portion 48, that is, in the middle of the block bus bar 45.

  One end side of the block bus bar 45 having the bus bar side bolt insertion hole 47 is formed as a portion to be fastened and fixed by the bolt 31 and the nut 32. Specifically, it is formed as an electrical connection portion with the fuse box body 24, that is, a terminal (the bus bar side bolt insertion hole 47 is formed into a circular through hole. The U-shaped part may be used as the bus bar side bolt insertion part).

  Further, the other end side of the block bus bar 45 having the electrical contact portion 48 is formed as a portion that electrically connects the terminal 26 (wire terminal) of the end of the electric wire 22. Specifically, it is formed as an electrical connection portion with a load (not shown). In this embodiment, it is formed to be a tab-shaped terminal.

  Further, an intermediate portion of the block bus bar 45 having the locked portion 49 is formed as a portion locked to the block housing 46. The locked portion 49 is formed so as to penetrate a rectangle.

  The block housing 46 is a box-shaped resin molded part with an open bottom surface, and includes a bus bar insertion part 50, a lock part 51, a terminal insertion connection part 52, a terminal locking part 53, and a guided part 54. (See FIG. 7).

  The bus bar insertion portion 50 is an insertion portion of the block bus bar 45 and is formed so as to penetrate from the upper surface of the block housing 46 to the terminal insertion connection portion 52. The bus bar insertion portion 50 is formed in accordance with the shape from the other end side to the middle of the block bus bar 45. In the middle of the bus bar insertion part 50, a lock part 51 is arranged and formed. The lock part 51 is formed in a locking projection shape having flexibility. The lock part 51 is formed so that the locked part 49 of the block bus bar 45 can be hooked and locked.

  The terminal insertion connecting portion 52 is a portion that is continuous with the lower surface opening of the block housing 46 and is formed so as to accommodate the terminal 26 (electric wire terminal terminal) of the end of the electric wire 22 inserted from the lower surface opening. ing. In the terminal insertion connecting portion 52, an electrical contact portion 48 of the block bus bar 45 inserted from the upper surface side of the block housing 46 is formed so as to protrude. The terminal 26 inserted and accommodated in the terminal insertion connecting portion 52 is hooked and locked by the terminal locking portion 53. The terminal locking portion 53 is formed in a lance shape. Reference numeral 55 indicates a punching hole for forming the terminal locking portion 53 and the lock portion 51.

  The guided portion 54 is formed as a portion guided by the guide portion 36 of the fuse box body 24. The guided portion 54 is formed to slide on the guide portion 36.

  A terminal 26 (wire terminal) of the end of the electric wire 22 is a conductive female terminal fitting having an electric contact portion 56 and an electric wire connection portion 57 continuous with the electric contact portion 56. Unlike the conventional case, the terminal 26 is not fixed by the bolt 31 and the nut 32 of the fuse box body 24. In the present invention, a desired terminal can be used. Since the terminal 26 is a female terminal fitting in this embodiment, the electrical contact portion 48 of the block bus bar 45 in the terminal conversion block 25 is a male terminal fitting.

  The electrical contact portion 56 is formed as a portion that is electrically connected to the electrical contact portion 48 of the block bus bar 45. At a predetermined outer edge portion of the electrical contact portion 56, a locked portion 58 that is hooked and locked to the terminal locking portion 53 of the block housing 46 in the terminal conversion block 25 is formed. The electric wire connecting portion 57 is formed as a crimping portion for crimping the terminal conductor of the electric wire 22. In this embodiment, the terminal 26 is a crimp terminal, but may be a pressure contact terminal.

  Next, the assembly of the fuse box body 24 and the terminal conversion block 25 and the electrical connection between the fuse box 21 and a load (not shown) will be described based on the above configuration and structure.

  Assume that the assembly of the housing 29, the bus bar 30, and the nut 32 in the fuse box main body 24 and the mounting of the fusible link 23 are the same as in the prior art. Therefore, the description here is omitted.

  FIGS. 4 and 7 show a state in which the bus bar 30 and the nut 32 are assembled to the housing 29 in connection with the assembly of the fuse box body 24.

  7 and 10, when the terminal conversion block 25 is arranged on the lower surface side of the fuse box main body 24 and then the terminal conversion block 25 is moved upward to start assembly of the terminal conversion block 25, FIG. 8 and FIG. The guided portion 54 is guided to the guide portion 36 as shown in FIG. The terminal conversion block 25 slides upward because the guided portion 54 is guided by the guide portion 36 of the fuse box body 24.

  9, in the terminal conversion block 25 that has been slid upward, the position of the bus bar side bolt insertion hole 47 of the block bus bar 45 coincides with the position of the cylindrical portion 38 of the nut 32 in the fuse box body 24. Further, it also coincides with the position of the bolt insertion hole 28 of the fuse terminal 27 in the fusible link 23. When one end side of the block bus bar 45 is electrically connected with the bolt 31 and the nut 32 in such a state, the assembly of the terminal conversion block 25 to the fuse box body 24 is completed. The terminal conversion block 25 is in a state as shown in FIGS.

  When the assembly of the terminal conversion block 25 is completed, the assembly as the fuse box 21 is also completed.

  1 and 2, when the terminal 26 of the electric wire 22 is inserted into the terminal insertion connecting portion 52 of the block housing 46 in the terminal conversion block 25, the electrical contact portion 56 of the terminal 26 and the electrical contact portion 48 of the block bus bar 45 come into contact with each other. The electrical connection is completed.

  As described above with reference to FIGS. 1 to 11, according to the present invention, the terminal conversion block 25 is provided so that the connection of the wire terminal (the terminal 26 of the terminal of the wire 22) is performed without inclination. be able to. Therefore, there is an effect that connection failure can be prevented.

  More specifically, the present invention is an invention relating to a connection structure between a fuse box 21 including a terminal conversion block 25 and a terminal 26 of an electric wire 22 extending from a load or a power source (not shown). The terminal conversion block 25 is a member that is fastened and fixed by a bolt 31 and a nut 32 together with the fuse terminal 27 of the fusible link 23. When electrically connecting a load or a power source (not shown) to the fuse box 21, It is only necessary to insert the terminal 26 of the electric wire 22 into the terminal conversion block 25. The present invention employs a structure that does not require bolting in connection with the connection of the terminal 26, and as a result, there is an effect that connection failure can be prevented.

  In addition, according to the present invention, since the guide portion 36 for the nut 32 is used when the terminal conversion block 25 is attached, the fuse box body 24 may have the same structure as the conventional one. Therefore, the terminal conversion block 25 can be mounted without using a dedicated mounting member.

  Further, according to the present invention, in assembling the terminal conversion block 25 itself, it is only necessary to insert the block bus bar 45 into the bus bar insertion portion 50 of the block housing 46 to lock the lock portion 51 and the locked portion 49. Therefore, the terminal conversion block 25 with good productivity can be obtained.

  It goes without saying that the present invention can be variously modified without departing from the spirit of the present invention.

21 ... Fuse box (electric equipment, electrical junction box)
22 ... Electric wire 23 ... Fusible link 24 ... Fuse box body 25 ... Terminal conversion block 26 ... Terminal (wire terminal)
27 ... Fuse terminal (conductive plate part)
28 ... Bolt insertion hole (bolt insertion part)
29 ... Housing 30 ... Bus bar (conductive plate part)
DESCRIPTION OF SYMBOLS 31 ... Bolt 32 ... Nut 33 ... Cavity 34 ... Partition 35 ... Nut fixing part 36 ... Guide part 37 ... Substrate part 38 ... Tube part 39 ... Window part 40 ... Partition 41 ... Frame part 42 ... Bolt insertion hole (bolt insertion part)
43 ... Head 44 ... Shaft 45 ... Block bus bar 46 ... Block housing 47 ... Bus bar side bolt insertion hole (Bus bar side bolt insertion part)
48 ... Electric contact part (electrical contact part on the electric wire side)
DESCRIPTION OF SYMBOLS 49 ... Locked part 50 ... Bus-bar insertion part 51 ... Lock part 52 ... Terminal insertion connection part 53 ... Terminal latching part 54 ... Guided part 55 ... Die-out hole 56 ... Electrical contact part 57 ... Electric wire connection part 58 ... Engagement Stop

Claims (3)

As a configuration of the electric device, a housing, a nut provided in the housing, a bolt engaged with the nut, a conductive plate portion having a bolt insertion portion, and the nut and the bolt are fastened and fixed together with the conductive plate portion. and a terminal conversion block that, the terminal conversion block includes a conductive block busbar, the block bus bars have a wire-side electrical contact portion on the other end and having a busbar-side bolt insertion portion at one end ,
The housing includes a guide portion that guides to a predetermined fixed position by sliding, and the terminal conversion block further includes an insulating block housing guided by the guide portion, and the block housing includes the electric wire side electric A connection structure between an electric device and an electric wire terminal terminal, characterized by having a terminal insertion connecting portion that accommodates the contact portion and connects and locks the electric wire terminal terminal to the electric wire side electric contact portion . In the connection structure between the electric device according to claim 1 and the electric wire terminal terminal,
The block housing has a bus bar insertion part and a lock part formed on the bus bar insertion part), and the block bus bar is locked between the bus bar side bolt insertion part and the electric wire side electric contact part. connection structure between electrical equipment and the wire end terminal, characterized in that it comprises a section). A connection structure between the electric device according to claim 1 and the electric wire terminal terminal is adopted.
An electrical junction box characterized by that.

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