JP5755210B2 - Junction box body, electrical junction box, and method of assembling the electrical junction box - Google Patents

Description

  The present invention, for example, allows a mounting of an ECU (Engine Control Unit) that acquires a signal from a sensor to control an engine or the like, and allows a mounting of an electric wire such as a wire harness connected to the sensor or the like. The present invention relates to a connection box main body such as a housing, an electric connection box, and an assembling method of the electric connection box.

  In an electrical junction box mounted on a vehicle such as an automobile, a junction box connected to a sensor or the like via an electric wire such as a wire harness has recently been assembled with an ECU configured separately from the junction box.

  For example, the electrical junction box described in Patent Document 1 is composed of a main body configured by attaching a printed circuit board to a synthetic resin housing and an ECU, and ensures electrical connection via a male-female connector. Yes.

  In such an electrical junction box, a rotating part constituted by a shaft leg and a shaft part is provided at one end of the ECU, and a shaft part accommodating part for accommodating the shaft part of the rotating part is provided in the main body. Then, the ECU shaft is housed in the shaft housing portion of the main body so as to slide, the ECU is rotated, and the lock arm and the lock are engaged to assemble the ECU to the main body. By making the ECU detachable from the main body in this way, it is possible to improve maintainability when the ECU fails.

  However, in such an electrical junction box, there is a possibility that an excessive load is applied to the connector that connects the main body and the ECU due to movement of the ECU due to backlash due to dimensional variation of the main body and the ECU.

  Therefore, when the electric junction box described in Patent Document 1 is provided with a rib on the second restriction wall and the shaft portion in the shaft portion housing portion and the ECU and the main body are assembled, the second restriction wall and the shaft portion are assembled. It is said that the movement of the ECU can be regulated by suppressing the play between the main body and the ECU by press-contacting the ribs so as to bite each other.

  However, the electric junction box described in Patent Document 1 may not be able to reliably regulate the movement of the ECU due to insufficient biting of the ribs in the second restriction wall and the shaft due to the dimensional variation of the ECU and the main body. is there.

  In addition, in the electrical junction box described in Patent Document 1, the rib on the flat surface of the second restriction wall and the rib on the side surface of the shaft portion are in pressure contact with each other. There was a problem of increasing.

JP 2008-172892 A

  In view of the above problems, an object of the present invention is to provide a junction box body, an electrical junction box, and an electrical junction box assembling method capable of restraining the assembly load and reliably restricting the movement of the mounting body. And

The present invention provides a junction box body that allows the mounting of a mounting body that houses therein a first circuit on which an electrical component is mounted, and allows the mounting of a second circuit different from the first circuit. A direction in plan view of mounting the mounting body on the connection box main body is a mounting direction, and a locked portion that fits into a lock portion provided on the mounting body on the connection box main body, and the mounting body and male-female fitting A connector opening for allowing insertion of a connector portion provided in the second circuit to be combined, a rotation center when rotating the mounting body by contacting a predetermined portion of the mounting body in the mounting direction And a pair of leg portions extending from the end surface in the mounting direction of the mounting body in the mounting direction, and a substantially columnar main body portion extending from the leg portion toward the other leg portion. Accommodates a pair of mounting legs along the mounting direction That a pair of housing portions, provided in this order in the mounting direction in a plan view, as a rotation about the fulcrum, the rotation direction of the mounting member which rotates in the direction to be attached to the junction box body dose A movement mounting direction, and the housing portion is provided with a restriction portion for restricting movement of the mounting leg portion in the rotation attachment direction, and the restriction portion is arranged on the inner side in the axial direction of the rotation center and / or the attachment. In the state where the mounting leg inclines so as to rise in the rotational mounting direction of the mounting leg from the inner side of the mounting body and the lock portion of the mounting body is fitted to the locked portion, the The mounting leg portion is composed of an inclined surface that abuts in the rotational mounting direction .

According to the present invention, it is possible to configure a junction box main body that can restrain the assembly load and reliably regulate the movement of the mounting body.
Specifically, by configuring the restricting portion of the junction box body with an inclined surface, the junction box body can be mounted anywhere on the inclined surface of the restricting portion even if there is a backlash with the attached body due to dimensional variations. The mounting leg can be brought into contact with each other.

Thereby, the connection box main body can regulate the movement of the mounting body in the rotational mounting direction, for example, without pressing the mounting leg portion of the mounting body against the regulating portion. That is, the junction box body can reduce the assembly load when the mounting body is mounted. For this reason, the load with respect to the control part of a junction box main body, a fulcrum part, etc. can be reduced. Therefore, the connection box main body can be easily changed in material or thinned to reduce weight and cost.
Furthermore, for example, when the inclined surface of the restricting portion is formed along the axial direction of the rotation center, the movement of the mounting body in the rotation mounting direction and the axial direction can be reliably controlled.

Furthermore, for example, when the inclined surface of the restricting portion is formed along the mounting direction of the mounting body, the movement of the mounting body in the rotation mounting direction and in the direction opposite to the mounting direction in plan view can be reliably controlled. it can.
Therefore, the junction box main body can restrain the assembly load and reliably regulate the movement of the mounting body by configuring the regulating portion with an inclined surface.

  As an aspect of the present invention, the housing portion of the junction box main body includes a side wall portion facing the inner end surface of the main body portion of the mounting leg portion at a predetermined interval, and the rotation mounting is provided on the side wall portion. A shape having a guide projection that guides the mounting leg portion of the mounting body that rotates in a direction to a predetermined position in the axial direction, and has a guide surface that is inclined toward the restriction portion. And the axial distance between the tips of the guide protrusions is substantially the same as or slightly narrower than the axial distance between the inner end surfaces of the main body of the mounting leg. can do.

  According to the present invention, the connection box main body can be rotated while guiding the mounting body to be mounted in the axial direction. For this reason, the connection box main body can be mounted by smoothly rotating the mounting body. Thereby, even if there is a backlash with the mounting body due to dimensional variations, the connection box main body can reliably bring the mounting leg portion of the mounting body into contact with the predetermined contact portion of the restricting portion.

Furthermore, the axial distance in the guide protrusion is substantially equal to or slightly narrower than the axial distance in the main body, so that the connection box main body is attached to the mounting leg of the mounting body by the guide protrusion. The mounting body is not rotated so as to widen the gap. For this reason, the connection box main body can reliably prevent an increase in the assembly load due to a load that widens the interval between the mounting legs.
Therefore, the connection box main body can be mounted more smoothly without increasing the mounting load by providing the guide protrusion.

As an aspect of the present invention, an inclination angle at which the inclined surface rises at the restricting portion can be equal to or greater than an inclination angle at which the guide surface at the guide protrusion rises from the side wall portion.
According to the present invention, the connection box main body can prevent the mounting leg portion of the mounting body guided by the guide projection from being widened by the regulating portion of the connection box main body.

  Specifically, for example, when the inclination angle at which the inclined surface at the restricting portion rises is smaller than the inclination angle at which the guide surface at the guide protrusion rises from the side wall portion, the mounting leg portion in contact with a predetermined portion of the restricting portion The applied load may easily widen the interval between the mounting legs. For this reason, the connection box main body may not be able to sufficiently regulate the movement of the mounting leg portion in the rotational mounting direction.

Therefore, by making the inclination angle at which the inclined surface rises at the restricting portion to be equal to or larger than the inclination angle at which the guide surface at the guide protrusion rises from the side wall portion, the junction box body prevents the interval between the mounting leg portions from being easily widened. it can. For this reason, the connection box main body can suppress the increase in the assembly load at the time of mounting | wearing a mounting body.
Therefore, the connection box main body can more reliably suppress the increase in the assembly load and can reliably regulate the movement of the mounting body.

As an aspect of the present invention, the restricting portion of the junction box body can be provided with an opening that opens a range corresponding to the guide protrusion in the rotational mounting direction.
According to the present invention, the junction box main body can be brought into contact so that the vicinity of the inner end surface of the main body portion of the mounting leg of the mounting body bites into the edge of the opening, that is, the main body portion can be pressed against the regulating portion. For this reason, for example, the connection box main body can more reliably regulate the movement of the mounting body without providing a rib or the like on the mounting leg portion of the mounting body.
Therefore, the junction box body can more reliably regulate the movement of the mounting body by providing the opening.

  Further, as an aspect of the present invention, the fulcrum portion is arranged so that the mounting body comes into contact when the mounting leg portion of the mounting body starts to be accommodated in the housing portion, and the connector opening portion is configured so that the mounting body is When the mounting body is rotated in the rotational mounting direction, the mounting body starts to be fitted into the connector portion of the second circuit, and the locked body is the connector of the second circuit. When the fitting portion is fitted, the lock portion of the mounting body is arranged to start fitting, and when the locking portion of the mounting body is fitted to the locked portion, the mounting leg of the mounting body is placed. It can be set as the arrangement | positioning which the said main-body part in a part contact | abuts in the said rotation mounting direction.

  According to the present invention, the connection box main body is assembled in the process of mounting the mounting body at the time of fitting the connector part, fitting the locked part, and contacting the mounting leg part against the regulating part. The locked portion, the connector opening, the fulcrum portion, and the restricting portion can be arranged so that the load becomes maximum in this order. That is, the connection box main body can vary the timing at which the assembly load becomes maximum.

  For this reason, for example, when the timing at which the assembly load is maximized between when the locked portion is fitted and when the mounting leg portion of the mounting body is in contact with the restriction portion, the mounting body is attached to the connection box body. The assembly load during assembly increases easily. On the other hand, the connection box main body can suppress the increase in the assembly load at the time of assembling the mounting body by changing the timing at which the assembly load is maximized.

Further, for example, when the housing portion in the connection box body is provided with a guide protrusion, the connection box body is in the process of mounting the mounting body, when the mounting leg portion of the mounting body is guided along the guide protrusion, The respective assembly loads at the time of fitting the connector part, fitting the locked part, and contacting the mounting leg part against the regulating part can be maximized in this order.
Therefore, the connection box main body can control the movement of the mounting body by suppressing the assembly load by changing the timing at which the assembly load becomes maximum.

Further, as an aspect of the present invention, a structure housing that houses a predetermined structure connected to the second circuit via the connection box body between the axial directions of the housing portion in the connection box body. The housing portion and the structure housing portion may be configured to be arranged continuously from the fulcrum portion in the mounting direction in a plan view.
The predetermined structure may be a slow blow fuse, a fuse, or a connector of a wire harness.

  According to the present invention, it is possible to configure a junction box body that allows a predetermined structure and a mounting body to be mounted. At this time, since the connection box main body has the housing portion and the structure body housing portion connected in the mounting direction from the fulcrum portion in plan view, the contact range of the fulcrum portion that contacts the mounting body is narrowed. For this reason, when attaching a mounting body to a connection box main body, there exists a possibility that the load which acts on a fulcrum part may become large.

Therefore, for example, by arranging the locked part, the connector part, the fulcrum part, and the restriction part so that the timing at which the assembly load becomes maximum is different, the contact range of the fulcrum part becomes narrower in the junction box body. Moreover, the increase in the load which acts on a fulcrum part can be suppressed. For this reason, the connection box main body can smoothly rotate the mounting body.
Therefore, the junction box main body forms a structure housing portion to allow the mounting of the predetermined structure, and can suppress an increase in the assembly load even if the contact range of the fulcrum portion is reduced.

In addition, the present invention is an electrical connection box in which the second circuit is mounted on the connection box body described above and the mounting body is mounted.
According to the present invention, it is possible to configure an electrical junction box that can restrain the assembly load and reliably regulate the movement of the mounting body. Furthermore, the electrical junction box can reduce the load on the regulating portion and the fulcrum portion of the junction box main body and the load on the mounting leg portion of the mounting body. Therefore, the electrical connection box can easily change the material of the connection box main body and the mounting body, or can be thinned to reduce the weight and the cost.

As an aspect of the present invention, a substantially linear protrusion projecting toward the restriction portion can be formed at a position in contact with the restriction portion in the attachment leg portion of the attachment body.
The said linear protrusion can be used as the rib etc. which press-contact with the control part of a connection box main body.

  According to the present invention, when the mounting leg portion of the mounting body comes into contact with the inclined surface of the restriction portion in the connection box body, the linear protrusion of the mounting body is pressed by the restriction portion of the connection box body. For this reason, the electrical connection box regulates the movement of the mounting body in the rotational mounting direction and the direction opposite to the mounting direction by increasing the load with which the main body portion of the mounting leg presses the inclined surface of the regulating portion. be able to.

  Furthermore, since the linear protrusions of the mounting legs are brought into contact with the inclined surface of the restricting part by substantially line contact or substantially point contact, the electrical connection box is assembled even if the linear protrusion is provided on the mounting body. An increase in the applied load can be suppressed. More specifically, the electrical junction box can reduce the load required for the pressure contact of the linear protrusion by reducing the contact area between the inclined surface of the restricting portion and the mounting leg portion. Even if it provides, it can suppress that an assembly | attachment load increases.

In addition, the electrical junction box can adjust, for example, the amount by which the linear protrusion is pressed by the inclination angle of the inclined surface in the restricting portion. That is, the electrical connection box can easily adjust the assembly load by adjusting the pressure contact amount of the linear protrusion.
Therefore, the electrical junction box can restrict the movement of the mounting body more reliably by suppressing the increase in the assembly load by providing the linear protrusion on the mounting body.

  Further, the present invention is the above-described method of assembling the electrical junction box, wherein when the mounting leg portion of the mounting body starts to be housed in the housing portion, the mounting body abuts on the fulcrum portion, and the mounting body Is rotated in the rotation mounting direction, the mounting body starts to be fitted into the connector portion of the second circuit, and when the mounting body is fitted into the connector portion, the mounting body When the lock portion starts to be fitted to the locked portion and the lock portion of the mounting body is fitted to the locked portion, the main body portion of the mounting leg portion of the mounting body is in the rotational mounting direction. It abuts on the restricting portion.

  According to the present invention, the method of assembling the electrical junction box is a process in which the attachment body is attached to the junction box body, when the connector portion is fitted, when the locked portion is fitted, and the attachment leg portion comes into contact with the restriction portion. The respective assembly loads at the time of contact can be maximized in this order. That is, the method of assembling the electrical junction box can vary the timing at which the assembling load becomes maximum.

Further, for example, when the housing portion in the connection box main body is provided with a guide protrusion, the mounting method of the electric connection box is that the mounting leg portion of the mounting body is the guide protrusion in the process of mounting the mounting body on the connection box main body. Assembling loads are maximized in this order at the time of being guided along, when the connector part is fitted, when the locked part is fitted, and when the mounting leg part comes into contact with the restricting part. Can be.
Therefore, the method for assembling the electrical junction box can control the movement of the mounting body with the assembly load suppressed by changing the timing at which the assembly load becomes maximum.

  According to the present invention, it is possible to provide a junction box body, an electrical junction box, and an electrical junction box assembling method that can restrain the assembly load and reliably regulate the movement of the mounting body.

The external appearance perspective view which shows the external appearance from the front upper direction in an electrical junction box. The disassembled perspective view which shows the external appearance from the front upper direction of the component in an electrical junction box. The disassembled perspective view which shows the external appearance from the back upper direction of the component in an electrical junction box. The top view which shows the external appearance from the upper view in an electrical-connection box. AA arrow sectional drawing in FIG. BB arrow sectional drawing in FIG. Explanatory drawing explaining the process of mounting ECU in a junction box by a BB arrow. Explanatory drawing explaining the process of mounting ECU in a junction box by a BB arrow. Explanatory drawing explaining the principal part in the process of mounting ECU in a junction box. BB arrow sectional drawing in another electrical junction box.

An embodiment of the present invention will be described below with reference to the drawings.
1 shows an external perspective view of the electrical junction box 1 from the front upper side, FIG. 2 shows an exploded perspective view of the components of the electrical junction box 1 from the front upper side, and FIG. 4 shows an exploded perspective view from above and behind the element, FIG. 4 shows a plan view from above of the electrical junction box 1, FIG. 5 shows a cross-sectional view taken along the line AA in FIG. 4, and FIG. 4 is a cross-sectional view taken along arrow BB in FIG.

2 is an enlarged view of the main part of the main part of the ECU 10, and the W part in FIG. 5 and the Z part in FIG. 6 are the main parts of the electric junction box 1 enlarged. The enlarged view of a part is shown.
In the figure, an arrow X indicates the front-rear direction (hereinafter referred to as “front-rear direction X”), and an arrow Y indicates the width direction (hereinafter referred to as “width direction Y”). Furthermore, in the front-rear direction X, the connecting portion 34 side (lower left side in FIG. 1) described later is defined as the front, and the locking portion 32 side described later (upper right side in FIG. 1) is defined as the rear. In addition, the upper side in the figure is the upper side, and the lower side is the lower side.

  As shown in FIGS. 1 to 3, an electrical junction box 1 mounted on a vehicle such as an automobile includes an ECU (Engine Control Unit) 10 that acquires a signal from a sensor (not shown) and controls an engine, It is comprised with the junction box 20 to which the wire harness (illustration omitted) connected to the sensor etc. is connected.

  As shown in FIGS. 2 to 6, the ECU 10 has a substantially rectangular box shape with a predetermined thickness in the vertical direction, and has a first circuit board (not shown) mounted with electrical components, and a first circuit. The ECU housing 11 is made of a synthetic resin that surrounds the substrate. A connection terminal (not shown) connected to the first circuit board is included in the vicinity of the rear of the lower surface of the ECU 10 and is attached to the first circuit board. The male connector part 12 (refer FIG. 7) to fit is provided.

Furthermore, a lock arm portion 13 that fits with a lock portion 32 of a junction box 20 to be described later is provided at the rear center of the ECU housing 11. The lock arm portion 13 is formed so as to extend downward from a top surface of the ECU housing 11 slightly extending rearward in a substantially concave shape when viewed from the rear.
In addition, the front side surface of the ECU housing 11 in the front-rear direction X is provided with a pair of mounting legs 14 arranged along the width direction Y.

As shown in FIGS. 2, 5, and 6, the mounting legs 14 are a pair of legs that are substantially L-shaped in front view and extend forward from both ends in the width direction Y on the front side surface of the ECU housing 11. 15 and a substantially columnar main body 16 that is inverted from the leg 15 toward the other leg 15 are integrally formed.
Further, a rib 17 that is substantially triangular in a side view and extends in the width direction Y is formed on the side surface of the mounting leg portion 14 above the main body portion 16 so as to protrude upward.

  As shown in FIGS. 2 to 6, the junction box 20 includes a synthetic resin box main body 30 and a second circuit board 40 mounted from below the box main body 30 and mounted with electrical components. doing.

  As shown in FIGS. 2 to 6, the box body portion 30 includes a side wall portion 31 that forms an outer peripheral portion in plan view, a flat surface portion 33 on which the ECU 10 is placed in the internal space of the side wall portion 31, and the side wall portion 31. Are integrally formed with a connecting portion 34 that connects the internal space in the vicinity of the front side in the width direction Y.

  The side wall part 31 is a first side wall part 31a formed on the rear side of the box main body part 30, a second side wall part 31b that extends forward from the edge in the width direction Y of the first side wall part 31a and faces in the width direction Y. And a third side wall 31c, and a fourth side wall 31d that faces the first side wall 31a in the front-rear direction X.

  The first side wall portion 31a is formed in a substantially rectangular flat plate shape having the longitudinal direction in the width direction Y in the rear view. The first side wall portion 31a is formed with a lock portion 32 into which the lock arm portion 13 of the ECU 10 is fitted slightly extending backward and then extending downward. The lock portion 32 is formed with a lock protrusion 32a for fitting and fixing to the lock arm portion 13 so as to protrude rearward.

  The second side wall portion 31b has a flat plate shape with the front-rear direction X as the longitudinal direction in a side view, and is formed in a substantially portal shape in a side view that opens a range corresponding to the harness connector portion 42 of the second circuit board 40 described later. doing.

The third side wall portion 31c is formed in a substantially rectangular flat plate shape having the longitudinal direction X as the longitudinal direction when viewed from the side.
The fourth side wall portion 31d has a flat plate shape with the width direction Y as the longitudinal direction when viewed from the front, and is formed in a substantially portal shape with a front view opened in a range corresponding to the harness connector portion 43 of the second circuit board 40 described later. doing.

  Thus, the side wall part 31 is longer than the length of the ECU 10 in the front-rear direction X by the first side wall part 31a, the second side wall part 31b, the third side wall part 31c, and the fourth side wall part 31d. It has a substantially rectangular shape.

  The planar portion 33 is formed in a size corresponding to the size of the ECU 10 when viewed from above, and both ends of the front end side in the width direction Y and a predetermined range substantially in the center of the width direction Y protrude forward. It is formed in a flat plate shape. And the plane part 33 is arrange | positioned in the up-down direction approximate center of the box main-body part 30 so that the space enclosed by the side wall part 31 and the connection part 34 mentioned later may be obstruct | occluded in upper direction.

  Further, in the vicinity of the first side wall portion 31a in the flat portion 33, a connector opening portion 33a that allows insertion of a female connector portion 44 of the second circuit board 40 described later is formed. As shown in FIGS. 5 and 6, two fitting leg portions 35 that fit and hold the second circuit board protrude downward from the lower surface of the flat portion 33.

  The connecting portion 34 integrally includes a top plate portion 34a connected to the upper ends of the second side wall portion 31b, the third side wall portion 31c, and the fourth side wall portion 31d, and a connecting wall portion 34b suspended from the top plate portion 34a. Is formed.

The top plate portion 34a is a flat plate having a shape corresponding to the shape of the front edge of the flat surface portion 33 when viewed from above, and is recessed with both ends in the width direction Y on the rear edge and a predetermined range substantially in the center facing forward. And formed.
The connecting wall portion 34b is formed to hang downward from the rear edge of the top plate portion 34a.

And the box main-body part 30 accommodates the mounting | wearing leg part 14 of ECU10 by the 2nd side wall part 31b, the 3rd side wall part 31c, the connection wall part 34b, and the plane part 33, as shown in FIG.5 and FIG.6. A pair of accommodating portions 36 which are spaces and a structure accommodating portion 37 which is a space secured for accommodating predetermined structures (not shown) such as fuses and connectors of wire harnesses are configured.
More specifically, the pair of housing portions 36 are configured at both ends in the width direction Y of the box main body portion 30, and the structure housing portion 37 is configured at substantially the center in the width direction Y of the box main body portion 30.

  Further, a guide protrusion 38 (see FIG. 5) that protrudes outward in the width direction Y is formed on the connecting wall portion 34b of the accommodating portion 36. In addition, a restricting portion 39 for restricting the upward movement of the mounting leg portion 14 is formed extending from the top plate portion 34a and the connecting wall portion 34b above the guide protrusion 38 in the accommodating portion 36. ing.

  The guide protrusion 38 is a substantially triangular shape whose cross-sectional shape in the rear view is inverted in the width direction Y, and extends along the front-rear direction X. A surface is formed. In addition, the space | interval of the front-end | tips in the width direction Y of the guide protrusion 38 is formed substantially equivalent to the space | interval of the inner side end surface of the main-body part 16 in the mounting leg part 14 of ECU10.

  The restricting portion 39 is formed such that the lower surface of the cross-sectional shape in the rear view is formed by an inclined surface 39a that is inclined upward from the connecting wall portion 34b. Further, the restricting portion 39 is formed with a guide opening 39b that opens in a range corresponding to the guide protrusion 38 when viewed from above. The inclined surface 39a is formed so that the inclination angle rising from the connection wall portion 34b is equal to or greater than the inclination angle of the lower surface of the guide projection 38 rising from the connection wall portion 34b.

2, 3, 5, and 6, the second circuit board 40 includes a board body 41, harness connector portions 42 and 43 to which a connector of a wire harness is connected, and the male connector 12 of the ECU 10. Are connected to each other and a plurality of connection terminals (not shown) connected to the substrate body 41.
The substrate body 41 is configured by forming a circuit pattern on an insulating flat plate having a predetermined thickness.

The harness connector part 42 includes the connection terminal and is attached to the board body 41 so as to be exposed from the opening in the second side wall part 31 b of the box body part 30.
The harness connector portion 43 includes the connection terminal and is attached to the substrate body 41 so as to be exposed from the opening in the fourth side wall portion 31 d of the box body portion 30.

  The female connector portion 44 includes a connection terminal and is attached to the substrate body 41 so as to be exposed upward from the connector opening 33 a of the box body portion 30.

A method of mounting the ECU 10 on the junction box 20 in the electrical junction box 1 configured as described above will be described in detail with reference to FIGS.
7 and 8 are explanatory views for explaining the process of attaching the ECU 10 to the junction box 20 in the direction of arrows BB, and FIG. 9 is an explanation for explaining the main part in the process of attaching the ECU 10 to the junction box 20. The figure is shown.

7A shows a first stage in which the ECU 10 is mounted on the junction box 20 in the direction of arrows BB in FIG. 4, and FIG. 7B shows the state in the junction box 20 in the direction of arrows BB in FIG. FIG. 8 shows a third stage in which the ECU 10 is mounted on the junction box 20 as viewed in the direction of arrows BB in FIG. 4.
FIG. 9A shows an enlarged view of a main part in which the W part of FIG. 5 in the first stage is enlarged, and FIG. 9B shows an enlarged view of a main part of the W part in FIG. 5 in the second stage. Show.

  First, as shown in FIG. 7A and FIG. 9A, the ECU 10 whose rear end is inclined upward with respect to the front end is mounted on the flat portion 33 of the junction box 20 from above and rearward. At this time, the ECU 10 accommodates the mounting leg portion 14 in the accommodating portion 36 of the box body portion 30 so as to slide forward from the rear.

  When the mounting leg portion 14 starts to be accommodated in the accommodating portion 36, the front side upper end of the ECU 10 contacts the upper end of the connecting wall portion 34 b in the box main body portion 30 in the front-rear direction X. A contact point between the ECU 10 and the box body 30 is defined as a fulcrum part F. In addition, as shown in FIG. 9A, the ECU 10 is attached to the box body 30 so that one mounting leg 14 is close to the connecting wall 34b in the width direction Y in the housing portion 36 of the box body 30. Installation has started.

  Thereafter, as shown in FIGS. 7B and 9B, the rear end of the ECU 10 is moved downward while being in contact with the fulcrum part F. That is, the rear end of the ECU 10 is rotated from the upper side to the lower side with the fulcrum part F as the rotation center in a side view.

  A direction in which the rear end of the ECU 10 rotates from the upper side to the lower side with the fulcrum part F as a rotation center is defined as a rotation mounting direction R. Since the ECU 10 is rotated about the fulcrum part F as the center of rotation, the rotational mounting direction R of the mounting leg 14 accommodated in the accommodating part 36 of the box body 30 rotates from below to above. Direction.

  When the ECU 10 is rotated, the main body 16 of the mounting leg 14 contacts the lower surface of the guide protrusion 38 and moves in the width direction Y along the lower surface of the guide protrusion 38. That is, the ECU 10 rotates while being guided in the width direction Y by the guide protrusion 38 of the housing portion 36.

  When the ECU 10 is further rotated in the rotation mounting direction R, as shown in FIG. 8, the male connector portion 12 provided on the lower surface of the ECU 10 and the female connector portion 44 of the junction box 20 are male-female-fitted. To start. Subsequently, when the ECU 10 is rotated in the rotation mounting direction R, the lock arm portion 13 of the ECU 10 and the lock portion 32 of the junction box 20 start to be fitted.

Then, as shown in FIG. 6, when the lock arm portion 13 of the ECU 10 and the lock portion 32 of the junction box 20 are fitted, as shown in FIG. 14 is pressed against the inclined surface 39a of the restricting portion 39 so as to be crushed. At this time, the vicinity of the inner end face of the main body portion 16 of the mounting leg portion 14 comes into contact with the edge of the guide opening 39 b of the restriction portion 39.
In this way, the electric connection box 1 is configured by mounting the ECU 10 on the junction box 20.

The method of assembling the box main body 30, the electrical junction box 1, and the electrical junction box 1 that realizes the operation as described above can restrain the movement of the ECU 10 reliably while suppressing the assembly load.
Specifically, since the restricting portion 39 of the box main body portion 30 is configured by the inclined surface 39a, the box main body portion 30 is provided on the inclined surface 39a of the restricting portion 39 even if there is a backlash with the ECU 10 due to dimensional variation. The mounting leg 14 of the ECU 10 can always be brought into contact with somewhere.

  Thereby, the box main-body part 30 can control the movement of ECU10 to the rotation mounting direction R, for example, without pressing the mounting leg part 14 of ECU10 to the control part 39. FIG. That is, the box main body 30 can reduce the assembly load when the ECU 10 is mounted. For this reason, the load with respect to the control part 39, the fulcrum part F, etc. of the box main-body part 30 can be reduced. Therefore, the box main body 30 can be easily changed in material or thinned to reduce the weight and the cost.

Furthermore, since the inclined surface 39a of the restricting portion 39 is formed along the width direction Y, the movement of the ECU 10 in the rotational mounting direction R and the width direction Y can be reliably restricted.
Accordingly, the box main body 30 can reliably restrict the movement of the ECU 10 by suppressing the assembly load by configuring the restricting portion 39 with the inclined surface 39a.

  In addition, in the accommodating portion 36, the guide protrusion 38 is provided on the connecting wall portion 34b, so that the box body 30 can be rotated while guiding the mounted ECU 10 in the width direction Y. For this reason, the box body 30 can be mounted by smoothly rotating the ECU 10. As a result, the box main body 30 can reliably bring the mounting leg portion 14 of the ECU 10 into contact with the predetermined contact portion of the restricting portion 39 even if there is a backlash with the ECU 10 due to dimensional variations.

Further, by making the interval in the width direction Y in the guide projection 38 substantially the same as the interval in the width direction Y in the main body portion 16, the box body 30 is attached to the mounting leg portion of the ECU 10 by the guide projection 38. The ECU 10 is not rotated so as to widen the interval 14. For this reason, the box main-body part 30 can prevent reliably that the load which expands the space | interval of the mounting leg part 14 arises, and an assembly | attachment load increases.
Therefore, the box main body 30 can make the mounting of the ECU 10 smoother without increasing the mounting load by providing the guide protrusion 38.

  In addition, the box body 30 is guided by the guide protrusion 38 because the inclination angle at which the inclined surface 39a rises at the restricting portion 39 is equal to or greater than the inclination angle at which the lower surface of the guide protrusion 38 rises from the connecting wall 34b. The mounting leg portion 14 of the ECU 10 can be prevented from being widened by the restricting portion 39 of the box main body portion 30.

  Specifically, for example, when the inclination angle at which the inclined surface 39a rises in the restricting portion 39 is smaller than the inclination angle at which the lower surface of the guide projection 38 rises from the connecting wall portion 34b, it contacts the predetermined portion of the restricting portion 39. There is a possibility that the interval between the mounting legs 14 is easily widened by the load acting on the mounting legs 14. For this reason, the box body 30 may not be able to sufficiently regulate the movement of the mounting leg 14 in the rotational mounting direction R.

Therefore, the box main body portion 30 can be easily spaced from the mounting leg portion 14 by setting the inclination angle at which the inclined surface 39a rises at the restricting portion 39 to be equal to or larger than the inclination angle at which the lower surface of the guide protrusion 38 rises from the connecting wall portion 34b. Can be prevented from spreading. For this reason, the box main-body part 30 can suppress the increase in the assembly load at the time of mounting | wearing ECU10.
Therefore, the box main body 30 can more reliably suppress an increase in the assembly load and can reliably restrict the movement of the ECU 10.

Further, since the guide opening 39b is provided in the restricting portion 39 of the box main body 30, the box main body 30 abuts so that the main body 16 of the mounting leg 14 of the ECU 10 bites into the edge of the guide opening 39b. That is, the main body portion 16 can be brought into pressure contact with the restriction portion 39. Therefore, for example, the box body 30 can more reliably regulate the movement of the ECU 10 without providing a rib or the like on the mounting leg 14 of the ECU 10.
Therefore, the box body 30 can more reliably regulate the movement of the ECU 10 by including the guide opening 39b.

  Further, when the mounting leg portion 14 of the ECU 10 starts to be accommodated in the accommodating portion 36, the fulcrum portion F is arranged so that the ECU 10 contacts, and the female connector portion 44 is rotated in the rotational mounting direction R. When the ECU 10 is fitted to the female connector portion 44, the lock arm portion 13 of the ECU 10 is started to be fitted, and the restricting portion 39 is locked to the ECU 10. When the arm portion 13 is fitted to the lock portion 32, the main body portion 16 in the mounting leg portion 14 of the ECU 10 is arranged so as to contact in the rotational mounting direction R, so that the box main body portion 30 is in the process of mounting the ECU 10. When the mounting leg 14 of the ECU 10 is guided along the guide projection 38, the female connector 44 is fitted, the lock 32 is fitted, and the mounting leg 14 is fitted. Abuts the restricting portion 39 so that each assembly load during contact is maximized in this order can be placed locking portion 32, the connector opening 33a, the fulcrum portion F, and the regulation portion 39. That is, the box main body 30 can vary the timing at which the assembly load becomes maximum.

  For this reason, for example, when the timing at which the assembly load at the time when the lock portion 32 is fitted and when the mounting leg portion 14 of the ECU 10 is in contact with the restriction portion 39 coincides, the box main body portion 30 is brought into the ECU 10. The assembly load when assembling is easily increased.

On the other hand, the box main-body part 30 can suppress the increase in the assembly load at the time of assembling ECU10 by varying the timing from which the assembly load becomes the maximum, respectively.
Therefore, the box main-body part 30 can control the movement of ECU10 reliably, suppressing an assembly load by changing the timing when an assembly load becomes the largest.

  Further, by forming the structure housing portion 37, it is possible to configure the box body portion 30 that allows the predetermined structure and the ECU 10 to be mounted. At this time, since the box main body 30 has the housing portion 36 and the structure housing portion 37 connected to the front from the fulcrum portion F in plan view, the contact range of the fulcrum portion F that contacts the ECU 10 is narrowed. . For this reason, when attaching ECU10 to the box main-body part 30, there exists a possibility that the load which acts on the fulcrum part F may become large.

Thus, the box main body 30 can be brought into contact with the fulcrum portion F by arranging the lock portion 32, the connector opening 33a, the fulcrum portion F, and the restriction portion 39 so that the timing at which the assembly load becomes maximum is different. Even if becomes narrower, an increase in the load acting on the fulcrum portion F can be suppressed. For this reason, the box main-body part 30 can rotate ECU10 smoothly.
Accordingly, the box main body 30 forms the structure housing portion 37 to allow the mounting of a predetermined structure, and the assembly load increases even if the contact range of the fulcrum portion F is reduced. Can be suppressed.

  In addition, by mounting the second circuit board 40 on the box body 30 and mounting the ECU 10, it is possible to configure the electrical junction box 1 that can restrain the assembly load and reliably restrict the movement of the ECU 10. Furthermore, the electrical junction box 1 can reduce the load on the restriction portion 39 and the fulcrum portion F of the box main body 30 and the load on the mounting leg portion 14 of the ECU 10 and the like. Therefore, the electrical connection box 1 can easily change the material of the box main body 30 and the ECU 10 or can be thinned to reduce the weight and the cost.

In addition, since the rib 17 is formed at a position in contact with the restricting portion 39 in the mounting leg portion 14 of the ECU 10, the electric junction box 1 can more reliably restrict the movement of the ECU 10.
Specifically, when the mounting leg portion 14 of the ECU 10 comes into contact with the inclined surface 39 a of the restricting portion 39 in the box main body portion 30, the rib 17 of the ECU 10 is pressed by the restricting portion 39 of the box main body portion 30. As a result, the electrical connection box 1 increases the load that the main body portion 16 of the mounting leg portion 14 presses the inclined surface 39a of the restricting portion 39, thereby further moving the ECU 10 in the rotational mounting direction R and backward. It can be regulated reliably.

  Furthermore, since the rib 17 of the mounting leg portion 14 is brought into contact with the inclined surface 39a of the restricting portion 39 by substantially line contact or substantially point contact, the electrical junction box 1 can be assembled even if the ECU 10 is provided with the rib 17. An increase in load can be suppressed. More specifically, the electrical junction box 1 can reduce the load required for the pressure contact of the rib 17 by reducing the contact area between the inclined surface 39a of the restricting portion 39 and the mounting leg portion 14. Even if it provides, it can suppress that an assembly | attachment load increases.

In addition, the electrical junction box 1 can adjust the amount by which the rib 17 is pressed by the inclination angle of the inclined surface 39a in the restricting portion 39, for example. That is, the electrical connection box 1 can easily adjust the assembly load by adjusting the pressure contact amount of the rib 17.
Therefore, by providing the ECU 10 with the rib 17, the electrical junction box 1 can more reliably regulate the movement of the ECU 10 while suppressing an increase in the assembly load.

  In addition, in the above-mentioned embodiment, although the inclined surface 39a of the control part 39 was formed along the width direction Y, it is not limited to this, FIG. 10 which shows BB arrow sectional drawing in another electrical junction box 1 is shown. As described above, the restriction portion 39 may include the inclined surface 39a that is inclined so that the cross-sectional shape in the side view rises obliquely upward from the rear. Thereby, rotation mounting direction R and the movement of ECU10 to back can be controlled.

  Further, although the interval in the width direction Y of the guide projection 38 is substantially equal to the interval in the width direction Y of the main body portion 16 of the mounting leg 14, the width direction Y in the main body portion 16 is not limited to this. The interval in the width direction Y of the guide protrusion 38 may be slightly reduced with respect to the interval.

  Further, although the female connector 44 is mounted on the second circuit board 40, the present invention is not limited to this, and the female connector 44 may be formed integrally with the box body 30. Even in this case, the same effect as that of the above-described embodiment can be obtained.

In correspondence between the configuration of the present invention and the above-described embodiment,
The first circuit of the present invention corresponds to the first circuit board of the embodiment,
Similarly,
The mounting body corresponds to the ECU 10,
The second circuit corresponds to the second circuit board 40,
The connection box main body corresponds to the box main body 30,
Plan view corresponds to top view,
The mounting direction corresponds to the front in the front-rear direction X,
The lock part corresponds to the lock arm part 13,
The locked part corresponds to the lock part 32,
The connector part corresponds to the female connector part 44,
The axial direction corresponds to the width direction Y,
The side wall portion corresponds to the connecting wall portion 34b,
The guide surface corresponds to the lower surface of the guide protrusion 38,
The opening corresponds to the guide opening 38b,
The linear protrusion corresponds to the rib 17,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

1 ... Electric junction box 10 ... ECU
DESCRIPTION OF SYMBOLS 13 ... Lock arm part 14 ... Mounting leg 15 ... Leg part 16 ... Main body part 17 ... Rib 30 ... Box main body part 32 ... Lock part 33a ... Connector opening part 34b ... Connecting wall part 36 ... Housing part 37 ... Structure body accommodating part 38 ... Guide protrusion 39 ... Regulator 39a ... Inclined surface 39b ... Guide opening 40 ... Second circuit board 44 ... Female connector F ... fulcrum R ... Rotation mounting direction X ... Previous direction Y ... Width direction

Claims (9)

A junction box body that allows mounting of a mounting body that houses therein a first circuit on which an electrical component is mounted, and allows mounting of a second circuit different from the first circuit,
The mounting direction is a direction in a plan view of mounting the mounting body on the connection box body,
In the junction box body,
A locked part that fits into a locking part provided in the mounting body;
A connector opening for allowing insertion of a connector portion provided in the second circuit for male-female fitting with the mounting body;
A fulcrum portion which is a center of rotation when the mounting body is rotated by contacting the predetermined position on the mounting body in the mounting direction;
A pair of mounting legs formed of a pair of legs extending in the mounting direction from the end surface of the mounting body in the mounting direction, and a substantially columnar main body extending from the legs toward the other leg. And a pair of storage portions for storing them in the mounting direction in the mounting direction in a plan view,
With the fulcrum part as the rotation center, the rotation direction of the mounting body that rotates in the direction of mounting on the connection box body is the rotation mounting direction,
In the housing part,
A restriction portion for restricting movement of the mounting leg portion in the rotational mounting direction;
The regulation part
The mounting center is inclined so as to rise from the inner side in the axial direction of the rotation center and / or from the inner side of the mounting direction to the rotation mounting direction of the mounting leg portion of the mounting body, and the lock portion of the mounting body is A junction box main body configured by an inclined surface with which the mounting leg portion of the mounting body abuts in the rotational mounting direction in a state of being fitted to the lock portion . In the housing part of the junction box body,
A side wall portion facing the inner end surface of the main body portion at a predetermined distance in the mounting leg portion;
On the side wall,
A guide protrusion for guiding the mounting leg of the mounting body that rotates in the rotational mounting direction to a predetermined position in the axial direction;
The guide protrusion
It is formed in a shape having a guide surface inclined toward the restricting portion, and the axial interval between the tips of the guide protrusions is the axial distance between the inner end surfaces of the main body portion of the mounting leg portion. The junction box body according to claim 1, wherein the junction box body is formed to be substantially the same as or slightly narrower than the interval. An inclination angle at which the inclined surface in the restricting portion rises,
The junction box main body according to claim 2, wherein the guide surface of the guide protrusion has an inclination angle that rises from the side wall. In the restriction part of the junction box body,
The electrical junction box according to claim 2 or 3, further comprising an opening that opens in a range corresponding to the guide protrusion in the rotational mounting direction. The fulcrum part is
When the mounting leg of the mounting body starts to be housed in the housing portion, the mounting body is in contact with the mounting body,
The connector opening,
When the mounting body is rotated in the rotational mounting direction, the mounting body starts to fit into the connector portion of the second circuit;
The locked part is
When the mounting body is fitted to the connector portion of the second circuit, the lock portion of the mounting body is arranged to start fitting,
The regulating part,
5. The arrangement according to claim 1, wherein when the lock portion of the mounting body is fitted to the locked portion, the main body portion of the mounting leg portion of the mounting body abuts in the rotational mounting direction. The junction box body described in 1. During the axial direction of the accommodating portion in the junction box body,
Forming a structure housing portion for housing a predetermined structure connected to the second circuit via the junction box body;
The accommodating portion, and the structure accommodating portion,
The junction box main body according to any one of claims 1 to 5, wherein the junction box main body is configured so as to be continuously arranged in the mounting direction from the fulcrum portion in a plan view. The junction box body according to any one of claims 1 to 6,
An electrical connection box on which the second circuit is mounted and the mounting body is mounted. At a position where the mounting leg comes into contact with the restricting portion of the mounting leg,
The electrical junction box according to claim 7, wherein a substantially linear protrusion projecting toward the restriction part is formed. The method for assembling the electric junction box according to claim 7 or 8,
When the mounting leg of the mounting body starts to be housed in the housing portion, the mounting body abuts on the fulcrum portion,
When the mounting body is rotated in the rotational mounting direction, the mounting body starts to fit into the connector portion of the second circuit,
When the mounting body is fitted to the connector part, the locking part of the mounting body starts to fit into the locked part,
A method of assembling an electrical junction box in which the main body portion of the mounting leg of the mounting body abuts on the regulating portion in the rotational mounting direction when the locking portion of the mounting body is fitted to the locked portion.

Images