JP2003032851A - Junction box and method of detecting half-insertion of terminal of cable terminal connected thereto - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect half-insertion of a cable terminal after directly inserting it into a cavity provided in a junction box. SOLUTION: An oblong longitudinal bus-bar is stored in the case of the junction box, and a cable connection block is protruded which has a plurality of cavities for insert-latching the cable terminal on a case external surface at the longitudinal bus-bar. A pair of clamping pieces of the terminal insert- latched in each of the cavities is fitted to the longitudinal bus-bar for electric connection. A lance is cut in a side wall of each of the cavities of the cable connection block. If the terminal is in a half-inserted condition without a latching pawl protruding to the cavity side of the lance being inserted into a latching recessed section of the terminal, the lance protrudes so as to be pulled outward, thus detecting the half-insertion of the terminal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a junction box for an automobile and a method for detecting half insertion of a terminal of an electric wire terminal connected to the junction box, and more particularly,
A strip-shaped vertical bus bar is used as a bus bar used in an internal circuit, and terminals of electric wire terminals of an external circuit are directly connected to the vertical bus bar without a connector.

[0002]

2. Description of the Related Art Recently, with the rapid increase in electrical components mounted on automobiles, the number of circuits contained in automobile electrical junction boxes, especially junction boxes, has increased rapidly to form branch circuits with high density. Moreover, the number of parts is extremely large, and the number of assembling steps is also very large.

In the junction box 1 shown in FIG. 12 of the electric connection box for automobiles, bus bars 5A to 5D are laminated between upper case 2 and lower case 3 with insulating plates 4A to 4E interposed. The upper case 2 is provided with a connector accommodating portion 2a, a relay accommodating portion 2b, and a fuse accommodating portion 2c, and a connector 6, a relay 7, and a fuse 8 are attached to these accommodating portions and project from these terminals and the bus bar. It is connected to the tab directly or via a relay terminal. There is also a case where the lower case 3 is also provided with a connector accommodating portion 3a and the tab 5a of the bus bar is projected so as to be connected to the connector.

The bus bars 5A to 5D fixed to the insulating plates 4A to 4E are formed by punching a conductive metal plate into a required circuit shape. This bus bar and the terminal of the wire terminal of the wire harness that serves as an external circuit are connected via a connector.The terminal of the wire terminal is inserted into the cavity of the connector, and this connector is formed on the outer surface of the junction box case. When fitted to the portion, the tab formed on the bus bar or the relay terminal connected to the tab is fitted to the terminal of the wire end in the connector.

Instead of the method of flatly placing the bus bar on the insulating plate described above, in a relay box or the like, as shown in FIG.
As shown in (B), the vertical bus bar 5'may be housed inside the case 2 ', and the vertical bus bar 5'is formed by forming a conductive metal material to give a required bent shape. .

[0006]

[Problems to be Solved by the Invention] As shown in FIG.
In the conventional junction box, since its internal circuit and the external circuit of the wire harness are connected via the connector, there is a problem that connection work between the connector and the wire harness is required and the number of parts is increased. This problem can be solved by providing a terminal accommodating portion in the junction box, inserting the terminal of the electric wire terminal directly into the terminal accommodating portion, and connecting directly to the bus bar of the internal circuit without a connector. When the terminal is directly inserted as described above, even if the terminal accommodating portion is provided with a lance portion that is inserted and locked in the locking recess of the terminal, the terminal is half inserted and is not locked with the lance portion. , This half insertion cannot be detected. If the terminal is connected to the connector, attach the retainer to the connector to temporarily lock the terminal with the lance part, and if the retainer is in the semi-inserted state without being locked to the lance part, the retainer will be installed. It is possible to detect the half-inserted state by not having it. However, it is difficult to attach the retainer to the terminal accommodating portion of the junction box due to a space problem or the like, and if the retainer is attached, there is a problem that the size becomes large. Also,
In the relay box, half insertion can be seen from the mating surface side of the terminal, but in the junction box, it is impossible to see from the mating surface side of the terminal.

Further, in the junction box 1 shown in FIG. 12, since the bus bar is punched into a circuit shape, it is necessary to re-form the bus bar when the circuit is changed, and the die cost for forming the bus bar is very high. There is a problem that it is expensive and cannot flexibly respond to circuit changes. Also,
The yield of the conductive metal plate used as the bus bar material is very low, which causes a cost increase. When the vertical bus bar 5 ′ shown in FIG. 13 is used, the yield is improved because the conductive metal plate is used as a strip shape, but each bus bar bent by forming is formed with a groove or a guide protrusion in the case. Since it has to be inserted between them, it takes a lot of work, which causes a cost increase.

Further, since the junction box shown in FIGS. 12 and 13 is also configured to connect a connector, a fuse and a relay to a bus bar which is an internal circuit, there is a change in specifications in which the connection between the fuse and the relay and the internal circuit is changed. In that case, the entire internal circuit has to be changed, and there is a problem that the circuit change cannot be easily dealt with.

The present invention has been made in view of the above problems, and uses a vertical bus bar having a high yield as a bus bar to be housed in a junction box, and the vertical bus bar and a wire harness are directly connected without a connector,
At that time, it is an object to detect the half-insertion of the terminal. Furthermore, the vertical busbars can be automatically assembled into the case all at once, and the circuit can be easily changed.In the circuit inside the junction box, a circuit to connect to an external circuit, a fuse or a relay, etc. When a circuit to be connected is changed, only the corresponding circuit is changed, and other circuit parts can be shared so that a modularization is achieved.

[0010]

In order to solve the above-mentioned problems, according to the present invention, strip-shaped vertical bus bars are housed in a case of a junction box in parallel with each other in the X direction, and the vertical bus bars are arranged. On the outer surface of the case at the position, a wire connection block in which a large number of cavities for inserting and locking terminals connected to the wire terminals of the external circuit are arranged in parallel in the Y direction is projected, and a pair of terminals for inserting and locking the cavities is inserted into each of the cavities. The holding piece is fitted into the vertical bus bar for electrical connection, and a lance portion that is inserted into and locked in the locking recess of the terminal is formed in the side wall of each cavity of the wire connection block. If the locking claw protruding toward the cavity side is not inserted into the locking recess of the terminal and the terminal is in the half-inserted state, the lance part projects outward to detect the half-insertion of the terminal. It provides a junction box, characterized in that as the adult.

A plurality of rows of electric wire connection blocks in which the above-mentioned cavities are arranged are provided, and the vertical bus bars and the electric wire insertion cavities arranged in the orthogonal direction are formed into a grid shape in the XY direction, and the vertical bus bars and the electric wires are crossed as required. They are connected at positions to form a required circuit, and the lance portions are provided in parallel on the peripheral walls of the respective wire connection blocks in the same direction.

According to the above construction, the terminals connected to the electric wire terminals are directly inserted and locked into the respective cavities of the electric wire connection block provided on the outer surface of the upper case of the junction box, and are connected to the vertical bus bar inside the case without a connector. be able to. An electric wire connection block may be provided on the outer surface of the lower case so that the terminal of the electric wire terminal can be connected to the lower case side from below the vertical bus bar.

Further, when the terminal is inserted to the regular position in the cavity, the lance portion formed on the side wall of the wire connection block is inserted and locked in the locking recess of the terminal, so that the terminal can be held at the regular position. it can. On the other hand, if the terminal is not inserted in the proper position, the lance portion projects outward from the side wall, so that the half insertion of the terminal can be detected. In addition, since the terminal connected to the external electric wire terminal is used to sandwich and connect the end of the vertical bus bar, the dedicated relay terminal required when using the conventional vertical bus bar can be eliminated.

Further, since strip-shaped vertical bus bars are used as the internal circuit of the junction box and are arranged in parallel inside the case, the yield of the conductive metal plate is 100.
%, The forming process can be omitted, and moreover, the automatic assembly can be performed at once in the case.

In the present invention, the junction box is divided into a base circuit section connected to an external circuit and a fuse connection circuit section and / or a relay connection circuit section,
A base module having a base circuit section and a fuse module having the fuse connection circuit section and / or a relay module having the relay connection circuit section are provided, and these modules are combined to assemble a junction box. The base circuit portion of the base module is composed of strip-shaped vertical bus bars arranged in parallel inside the case, and these vertical bus bars are positioned and held in grooves arranged in parallel on the inner surface of the case. A connector accommodating portion for fitting a connector connected to an electric wire terminal is also provided, a groove for inserting the vertical bus bar is provided at a tip of a housing of the connector, and a pair of clamping pieces of the terminal accommodated in the connector is provided on the vertical bus bar. It is fitted to make an electrical connection, and the fuse is attached to a part of the base module case. A module is mounted, the fuse module has a case portion attached to a substrate, a fuse attachment portion and / or a relay attachment portion is provided in the case portion, and a fuse and a relay terminal attached to the fuse attachment portion and / or the relay attachment portion A fuse that has one end connected to and the other end connected to the edge of the vertical bus bar.
A relay bus bar is attached to the board.

As described above, the base module having the base circuit portion connected to the external circuit and the fuse / relay module having the fuse connection circuit portion and / or the relay connection circuit portion are provided, and the junction box is provided from these modules. Therefore, if the specifications of the fuse connection circuit section and the relay connection circuit section are changed, only the fuse module and the relay module need be changed, and the specification change can be easily dealt with.
On the contrary, when only the connection circuit with the external electric wire is changed, it is only necessary to change the connection position of the electric wire connected to the vertical bus bar of the base module. it can.

As described above, when all the terminal terminals of the external electric wire to be connected to the vertical bus bar in the base module are inserted into the cavities of the electric wire connection block and connected to the internal circuit, it is necessary to connect the connector as in the conventional case. Although it disappears, there is a case where the wire harness and the junction box are connected in an automobile assembly line. Therefore, a connector housing for attaching a connector connected to an electric wire terminal of the wire harness is also provided in the junction box.

Further, according to the present invention, as a method for detecting a half-fitting of a terminal of an electric wire terminal connected to the electric wire connection block of the junction box, each lance portion arranged side by side on a peripheral wall of the electric wire connection block in the same direction. Using a detection jig consisting of a detection pin that comes into contact with the outer surface of the side wall, the detection pin is slid along the outer surface of the side wall, and when the terminal inserted into the cavity is half-inserted, the corresponding detection pin serves as a lance portion. It provides a detection method that detects half insertion by being caught.

When the electric wire connection block is projected at a plurality of rows at intervals, a detection jig in which a plurality of detection pins slid into these gaps are branched from the gripping portion is used and the detection pins are separated from each other. If they are moved simultaneously along with, efficient detection can be performed. Further, the detection of the lance portion projecting from the peripheral wall when the terminal is in the half-inserted state is not limited to the method using the jig, and may be detected using a required sensor or the like.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. 1 to 4 show a junction box 100 connected to an automobile wire harness.
Is a base module, 11 is a fuse relay module, and 18 is an ECU case.

The base module 10 has a large number of strip-shaped vertical bus bars 13 housed in parallel in the X direction inside a case consisting of an upper case 12 and a lower case 14, as shown in FIG. The vertical bus bar 13 constitutes a base circuit, and as shown in FIG. 5, the terminal 20 of the electric wire w is directly inserted into each cavity 16 of the electric wire connection block 15 provided in the upper case 12 to directly connect with the vertical bus bar 13. Connected. The fuse / relay module 11 is mounted on one side of the lower case 14 of the base module 10.

More specifically, the upper case 12 of the base module 10 has a top surface shape shown in FIGS.
On one side of the upper surface, which has the lower surface shape shown in FIG. 3, a plurality of electric wire connection blocks 15 are projected in parallel rows over substantially the entire length in the length direction. The electric wire connection block 15 in each row has a large number of cavities 16 that are terminal insertion portions arranged in parallel in the Y direction. Further, a plurality of connector accommodating portions 17 are provided on one side of the electric wire connection block 15 so as to project.

As shown schematically in FIG. 6, the inner surface of the upper case 12 is provided with a plurality of narrow grooves 12a for fixing the vertical bus bars 13 arranged in parallel. Each of these grooves 12a is continuous by sandwiching the bottom opening of the cavity 16 of the wire connection block 15 and the bottom opening of the connector accommodating portion 17, and the vertical bus bar 13 is inserted into each groove 12a for positioning and holding. The groove for positioning and holding the vertical bus bar 13 may be provided on the lower case side as well.

The vertical bus bar 13 inserted into and fixed to each groove 12a is either a continuous strip 13-1 or a plurality of vertical bus bars 13-.
There is a case where 2 is connected continuously with a gap. The vertical busbars 13 arranged in the X direction and the terminals 20 of the electric wire terminals to be inserted into the cavities 16 arranged in parallel in the Y direction are arranged in a grid pattern in the XY directions as shown in FIG. 13 and the terminal 20 are connected to form a required circuit.

As shown in FIG. 5, the terminal 20 crimped to the electric wire end to be inserted into each of the cavities 16 is provided with a pair of holding pieces 20a, and the vertical bus bar 13 is held by the pair of holding pieces 20a of the terminal 20. And connected. Further, the terminal 20 is provided with a locking recess 20c at a position between the core barrel 20b and the sandwiching piece 20a.

The peripheral wall 15a of the wire connection block 15 constituting the cavities 16 arranged side by side in the same direction is located at a position corresponding to each cavity 16 as shown in FIG.
A is cut to provide a lance portion 15b. The lance portion 15b is a locking claw 1 which inclines and projects inward of the cavity.
5c is inserted and locked in the locking recess 20c of the terminal 20.

Therefore, with the terminal 20 of the wire end directly inserted into each cavity 16 being inserted to the proper position and the locking claw 15c of the lance portion 15b being inserted into the locking recess 20c, the lance portion 15b becomes the side wall 15a. Form the same plane. On the other hand, the terminal 20 does not reach the normal position and the lance portion 15
When the locking claw 15c of b contacts with the holding piece 20a of the terminal 20, the lance portion 15b jumps out as shown in FIG. 8 (B). Therefore, it is possible to detect the half-insertion of the terminal 20 by making an appearance in this state.

As shown in FIG. 9, the connector accommodating portion 17 provided in the upper case 12 is fitted with the connector 30 into which the terminal of the electric wire is inserted and locked, and the lock claw 30a on the outer side of the connector 30 and the connector 30. The lock claw 17a on the inner wall of the housing portion 17 is lock-coupled. A vertical bus bar insertion groove 30b is provided in the connector 30 so that the vertical bus bar 13 is inserted into the connector, and terminals 31 in the connector are sandwiched between the vertical bus bar 13 for connection.

As shown in FIGS. 1, 2, and 3, the lower case 14 fitted with the upper case 12 is provided with a fuse / relay module installation portion 22 projecting from one end of the fitting portion with the upper case 12. is doing. The fuse / relay module installation portion 22 is provided with a connector accommodating portion 23 and a terminal hole 24. This fuse
The case 25 of the fuse / relay module 11 is assembled under the relay module installation portion 22. A terminal accommodating portion 26 that fits into the terminal hole 24 is protruded upward in the case 25, and a relay accommodating portion 27 and a fuse accommodating portion 28 are protruded downward.

The fuse and relay module installation section 2
As shown in FIG. 10, a board 36 is provided between the case 2 and the case 25.
A bus bar 40 for fuse relay is fixed to the substrate 36, and a terminal 40a composed of a sandwiching piece bent upward is provided at one end of the bus bar 40.
The vertical bus bar 13 of the internal circuit of the base module 10 and the bus bar 40 of the fuse / relay module 12 are connected by being sandwiched between them. The other end of the bus bar 40 is bent so that a terminal formed of a sandwiching piece is provided at the tip, and the fuse accommodating portion, the relay accommodating portion, the relay 50 to be inserted into the connector accommodating portion, the fuse 60, and the terminal of the power connector 70 are shown in FIG. They are connected as shown in.

Further, E is provided on the bottom of the base module 10.
The bus bar 40 that assembles the CU case 18, accommodates the printed circuit board 55 inside the under case 18, and extends the conductor of the printed circuit board 55 to the base module 10 side.
Is connected to.

In the junction box 100 having the above structure, the vertical bus bar 13 is arranged in parallel in the upper case 12 and the lower case 14 and accommodated therein to assemble the base module 10, and the base module 10 is arranged in parallel. The terminal 20 of the electric wire w can be connected to the vertical bus bar 13 only by directly and collectively inserting it into the cavity 16 of the electric wire connection block 15 of the upper case 12. Also, the connector 30 of the wire harness terminal
Is also fitted into the connector accommodating portion 17, the connector 3
The terminal 31 in 0 can be connected to the vertical bus bar 13.

The terminal 20 of the end of the electric wire w is inserted into each cavity 16, and the lance portion 1 is inserted into the locking recess 20c of the terminal.
As shown in FIG. 8 (B), the detection pin 80 is used to detect half-insertion to determine whether or not the locking claw 15c of 5b has been inserted and locked. The detection pin 80 is slid along the outer surface of the peripheral wall of the electric wire connection block 15, and when the terminal 20 is in the half-inserted state, the lance portion 1
Since 5b projects outward, it is possible to detect the half insertion of the terminal 20 when the detection pin 80 hits and abuts.

As shown in FIG. 11, a plurality of detection pins 80 are provided.
When a jig branched from the grip portion 81 is used, half insertion of the terminal 20 in each cavity 16 of the wire connection block 15 arranged in plural can be detected at one time.

The junction box 100 having the above structure
Then, the circuit can be easily changed by changing the connection position between each electric wire w and the vertical bus bar 13. Moreover, since the base module 10 and the fuse relay module 11 are separated and the fuse relay bus bar 40 of the fuse relay module 11 is connected to the vertical bus bar 13, the connection form of the base circuit and the external electric wire is reduced. Fuse relay module 11 if only changed
Can be shared. Similarly, if only the fuse connection circuit of the fuse / relay module 11 is changed, the base module 10 can be shared.

Further, since the base circuit of the base module 10 is formed by strip-shaped vertical bus bars 13 and these vertical bus bars 13 are simply inserted and fixed in the parallel grooves of the upper case 12, these vertical bus bars 13 are fixed. It is possible to automatically and collectively assemble the upper case 12. Therefore, the workability of assembling the base module 10 can be improved.

The present invention is not limited to the above-described embodiment, and any other suitable detection of the lance portion protruding from the outer surface of the peripheral wall of the wire connection block 15 may be performed other than sliding the detection pin 80 along the peripheral wall. You may make it detect by a means. Further, the fuse and relay module may be formed separately instead of being integrated.

[0038]

As is apparent from the above description, in the junction box of the present invention, versatile strip-shaped vertical bus bars are used as internal circuits in parallel,
Since the electric wire connection block in which the cavities are arranged side by side is projected in the case and the terminal of the electric wire terminal is directly inserted into each cavity to connect with the vertical bus bar, it is connectorless,
It is possible to reduce the assembly process of the electric wire and the connector and the number of parts. Also, the terminal of the wire end that is directly inserted into each cavity of the wire connection block provided in the case of the junction box is locked by the lance part formed by cutting the side wall of the cavity, so the terminal can be positioned and held securely. In addition to being able to do it, when the terminal is in the half-inserted state, the lance part protrudes outward from the peripheral wall,
The half insertion of the terminal can be easily detected.

Further, since the junction box of the present invention uses the strip-shaped vertical bus bar, it is used in the strip shape without being bent by the forming process as in the conventional case, and is arranged in parallel inside the case. In addition, the yield of the conductive metal plate can be 100%, the forming process can be omitted, and moreover, the assembly can be automatically carried out in the case at once.

Further, the internal circuit of the junction box is divided into a base circuit section connected to the external circuit and a fuse connection circuit section and / or a relay connection circuit section, and a base module provided with the base circuit section and the fuse described above. A fuse module equipped with a connection circuit section and / or a relay module equipped with the above relay connection circuit section is provided, and a junction box is assembled from these modules. Therefore, if the specifications of the fuse connection circuit section and the relay connection circuit section are changed, It is only necessary to change these fuse modules and relay modules, and it is possible to easily cope with changes in specifications. On the contrary, when only the connection circuit with the external electric wire is changed, it is only necessary to change the connection position of the electric wire connected to the vertical bus bar of the base module. it can.

[Brief description of drawings]

FIG. 1 is a perspective view of a junction box according to an embodiment of the present invention seen from an upper surface side.

FIG. 2 is an exploded perspective view of the junction box of FIG.

FIG. 3 is a perspective view of the junction box of FIG. 1 viewed from the lower side.

FIG. 4 is a front view of the junction box of FIG.

5A is a perspective view showing a connection state between a terminal of an electric wire terminal and a bus bar, and FIG. 5B is a perspective view showing a bottom surface side of the terminal of the electric wire terminal.

FIG. 6 is a perspective view showing a state in which a vertical bus bar is attached to the inner surface side of the upper case.

FIG. 7 is a schematic diagram showing a circuit connection state in a junction box.

FIG. 8A is a sectional view showing a state where the terminal is inserted into the cavity in a normal state, and FIG. 8B is a sectional view showing a state where the terminal is half inserted.

FIG. 9A is a perspective view of a connector to which an electric wire is connected, and FIG. 9B is a cross-sectional view of a state in which the connector is fitted in the connector housing portion of the junction box.

FIG. 10 is a sectional view of a junction box.

FIG. 11 is a schematic view showing a modified example of a half-inserted terminal detection jig.

FIG. 12 is a perspective view of a conventional junction box.

FIG. 13 shows a conventional relay box, (A) is a schematic plan view, and (B) is a perspective view of a vertical bus bar.

[Explanation of symbols]

100 junction box 10 base module 11 Fuse module 12 upper case 12a groove 13 Vertical bus bar 14 lower case 15 Electric wire connection block 15a side wall 15b Lance section 15c locking claw 16 cavities 17 Connector housing 18 ECU case 20 terminals 20c locking recess 22 Fuse module installation section 25 cases 30 connectors 40 Bus bar for fuse and relay 80 detection pins

Continued front page    (72) Inventor Yoshihiro Isshiki             Sumitomo Den 1-14 Nishi-Suehiro-cho, Yokkaichi-shi, Mie Prefecture             Sozo Co., Ltd. F-term (reference) 5E077 BB02 BB11 BB18 DD17 EE04                       GG01 JJ28                 5E087 FF06 FF13 GG15 JJ09 MM06                       QQ03 QQ04 RR41                 5G361 BA02 BB01 BC01

Claims (4)

[Claims] 1. A junction box has therein vertical bus bars arranged in parallel in the X direction and accommodated therein, and a terminal connected to an electric wire terminal of an external circuit on the outer surface of the case where the vertical bus bars are arranged. A plurality of cavities for inserting and locking are arranged side by side in the Y direction, and a pair of clamping pieces for inserting and locking the cavities are fitted into the vertical busbars for electrical connection. A lance portion that is inserted and locked in the locking recess of the terminal is formed in the side wall of each cavity of the wire connection block, and a locking claw protruding toward the cavity side of the lance portion locks the terminal. When the terminal is in the half-inserted state without being inserted in the recess, the lance part projects outward so that the half-insertion of the terminal can be detected. Nest. 2. A plurality of rows of electric wire connection blocks in which the cavities are arranged in parallel are provided, and the vertical bus bars arranged in the orthogonal direction and the electric wire insertion cavities are formed in a grid shape in the XY direction.
The junction according to claim 1, wherein the vertical bus bar and the electric wire are connected at a required crossing position to form a required circuit, and the lance portions are provided in parallel on the peripheral walls of the respective electric wire connection blocks in the same direction. box. 3. The junction box is divided into a base circuit section connected to an external circuit and a fuse connection circuit section and / or a relay connection circuit section, a base module having a base circuit section, and the fuse connection circuit. A fuse module having a portion and / or a relay module having the relay connection circuit portion is provided, and these modules are combined to assemble a junction box. The base circuit portion of the base module is arranged in parallel inside the case. The vertical bus bars are arranged and held in the grooves arranged in parallel on the inner surface of the case, and the case also has a connector accommodating portion for fitting the connector connected to the wire end. And a groove for inserting the vertical bus bar is provided at the tip of the housing of the connector. The pair of clamping pieces of the terminal accommodated in the connector are fitted into the vertical bus bar for electrical connection, and the fuse module is mounted on a part of the case of the base module, and the fuse module is mounted on a substrate. A case portion is attached, and a fuse attachment portion and / or a relay attachment portion is provided on the case portion, one end of which is connected to a fuse or a relay terminal attached to the fuse attachment portion and / or the relay attachment portion, and the other end of which is connected to the vertical portion. The junction box according to claim 1 or 2, wherein a fuse / relay bus bar connected to an edge of the bus bar is attached to the substrate. 4. A method for detecting half-fitting of a terminal of an electric wire terminal connected to the electric wire connection block of the junction box according to claim 1, wherein the electric wire connection block comprises: Using a detection jig composed of a detection pin that comes into contact with the outer surface of each lance portion arranged in parallel on the peripheral wall in the same direction, slide the detection pin along the outer surface of the side wall,
A method for detecting half-fitting of a terminal of an electric wire terminal connected to a junction box, which detects half-insertion by detecting the corresponding half-inserted detection pin when the terminal inserted in the cavity is half-inserted.