JP4606372B2 - Mounting structure of parts in electrical junction box - Google Patents

Description

  The present invention relates to a mounting structure for parts in an electrical junction box such as a relay box.

  For example, when a flasher relay (a relay that blinks the blinker) is attached to an electric junction box of an automobile, a cassette is attached to the outer wall surface of the junction box body, and a flasher relay is attached to the cassette later. Yes. The reason why the cassette is externally attached to the outer wall surface of the junction box main body is that it is necessary to attach the cassette to the junction box main body while the electric wire is connected to the lower portion of the cassette for the convenience of the assembly process. However, when the cassette is externally attached under such conditions, it is not preferable because an external force is easily applied to the cassette.

  In view of this, it is conceivable to provide a component accommodating portion inside the junction box main body so as to prevent external force from being directly applied to the cassette as in the case of normal electrical components (see, for example, Patent Document 1). However, it is practically difficult to attach the cassette with the electric wire attached to the lower side to the component accommodating portion provided inside the junction box body, and a device has been demanded.

Japanese Utility Model Publication No. 6-84732

  The present invention has been made in view of the above-described circumstances. For example, a component-accommodating hole provided on the inner side of a connection box body without externally attaching a component with an electric wire attached to the lower side to the connection box body. It is an object of the present invention to provide a mounting structure for parts in an electrical junction box that can be mounted on a cable.

In order to achieve the above-described object, the component mounting structure in the electrical junction box according to the present invention is characterized by the following (1) and ( 2 ).
(1) the box body,
A rectangular component housing hole provided in a plan view provided through the box body;
A component housed in the component housing hole, having a rectangular shape in plan view corresponding to the component housing hole, and an electric wire connected to the lower side ;
A locking portion protruding from the outer wall of the component;
A locked part provided on the inner wall of the component housing hole;
Have,
A structure for mounting a component in an electrical connection box, in which the lock portion is inserted into and engaged with the locked portion, and the component is fixed to the component receiving hole .
The locked portion is provided in the inner wall along the first side of the quadrangle of the component housing hole with a width shorter than the length of the first side,
The lock portion is provided on the outer wall along the first side of the quadrilateral of the component with a width shorter than the length of the first side,
The said side wall along a second side opposite to the first side of the component accommodating hole, recess to allow the passage of the locking portion of the component, at the second side of the width shorter than the length Formed and the wall surfaces on both sides of the recess in the range of the length of the second side project to the inside of the component receiving hole as a wall surface supporting the outer wall of the component ,
In a posture in which the component is rotated in the direction opposite to the normal mounting direction, the lock portion of the component is passed through the concave portion of the component receiving hole and penetrated from the lower side to the upper side of the component receiving hole. Then, the component is returned to the normal mounting direction, inserted into the component receiving hole from the upper side to the lower side, and the lock portion is inserted and engaged with the locked portion .
(2) In the mounting structure of the component in the electrical junction box of the above Paragraph (1), said component is a cassette for mounting another electrical component.

According to the component mounting structure in the electrical junction box having the configuration of (1) above, the component is moved from one side to the other side of the component accommodation hole by aligning the lock portion of the component with the concave portion of the component accommodation hole. It can be penetrated. Next, the direction of the part that has been pulled out to the other side of the box body is redirected to the normal mounting direction on the other side of the box body, and in this state, the part is inserted into the part receiving hole from the other side, The protruding lock portion is inserted into and engaged with a locked portion provided on the inner wall of the component accommodation hole. Thereby, a component can be attached to the component accommodation hole of a box main body. In this state, the wall surfaces on both sides of the concave portion project inward as the wall surfaces that support the component, so that no unnecessary gap is formed between the component and the component accommodation hole. Therefore, when a part is cantilever-supported by the lock part, an unnecessary gap is formed on the opposite side of the lock part, and there is a movement allowance corresponding to the gap, so that the part rotates with the lock part as a fulcrum. As a result, an excessive force acts on the lock part, and in the worst case, the lock part may be damaged, but by eliminating the useless gap, it is possible to eliminate the movement allowance of the parts, Thereby, it is possible to prevent an excessive force from being applied to the lock portion.
In addition , since the recess through which the lock part of the part passes is provided on the inner wall facing the inner wall of the component receiving hole provided with the locked part, the orientation of the part is rotated 180 degrees from the normal mounting direction. The lock part can be inserted into and engaged with the locked part by allowing the part to pass through the part receiving hole from one side to the other side and turning the part again when the part is pulled out to the other side. In addition, in a state where the part is attached, a part of the wall surface opposite to the side where the lock part is located (the wall surface on both sides of the recess) backs up the part, so that the part that is cantilevered by the lock part is stably held. This can prevent an excessive force from being applied to the lock portion.
According to the component mounting structure in the electrical junction box having the configuration ( 2 ) above, the cassette is passed through the component accommodation hole while being connected to the wire on one side of the component, and is inserted and engaged from the opposite side. Can be fixed. Then, another component can be mounted on the cassette. At this time, since the cassette can be stably held even in the cantilever state, even if an excessive force is applied when another component is mounted on the cassette, the lock portion is not damaged.

  According to the present invention, for example, a component with an electric wire attached to the lower side can be attached to a component accommodation hole provided on the inner side of the connection box body without being externally attached to the connection box body.

  The present invention has been briefly described above. Furthermore, the details of the present invention will be further clarified by reading through the best mode for carrying out the invention described below with reference to the accompanying drawings.

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

1 and 2 are explanatory diagrams of an embodiment of the present invention, and FIGS. 3 and 4 are explanatory diagrams of a comparative example thereof.
Here, an example in which a cassette (component) for mounting a flasher relay (another electrical component) is attached to a relay box (electrical connection box) will be described as an embodiment.

  First, a comparative example will be described with reference to FIGS. In the figure, 10 is a box body, 20 is a cassette, and 30 is an electric wire connected to the lower part of the cassette 20. A penetrating component accommodating hole 11 is provided inside the outer peripheral wall of the box body 10, and the cassette 20 is accommodated and fixed in the component accommodating hole 11 in a predetermined direction. As a fixing means, a lock portion 22 is projected on the outer wall of the cassette 20, and a locked portion 12 is provided on the inner wall of the component housing hole 11.

  The component accommodating hole 11 and the cassette 20 have a rectangular shape corresponding to each other in plan view, and the locked portion 12 is respectively formed on the inner wall of the component accommodating hole 11 and the outer wall of the cassette 20 along the first side of the rectangle. And the lock portion 22 are provided with a width shorter than the length of the first side. That is, the inner peripheral wall of the component housing hole 11 is constituted by four planar inner side walls 11a, 11b, 11c, and 11d, and a locked portion 12 is provided on one inner side wall 11a, and a cassette corresponding thereto. A lock portion 22 projects from the outer wall 20.

  In order to attach the cassette 20 to the component accommodation hole 11 of the box body 10, since the electric wire 30 is attached to the lower portion of the cassette 20 in advance, first, as shown in FIGS. The component accommodating hole 11 is penetrated from the lower side (one side) to the upper side (the other side) (operation of arrow A).

  At this time, as shown in FIG. 3A, the lock portion 22 on the cassette 20 side protrudes outward, so that a gap S1 through which the lock portion 22 can pass can be secured between the cassette 20 and the cassette 20. In addition, the dimension between the two opposing surfaces (inner side walls 11a, 11b) of the component housing hole 11 is set to be larger.

  When the cassette 20 is passed through the component housing hole 11 to the upper side of the box body 10, the cassette 20 is inserted into the component housing hole 11 from the top to the bottom as shown by an arrow B in FIG. By doing so, the lock portion 22 projecting from the outer wall of the cassette 20 is inserted and engaged with the locked portion 12 provided on the inner wall 11a of the component housing hole 11 from top to bottom. Thereby, the cassette 20 can be fixed to the component housing hole 11. Thereafter, as shown in FIG. 4D, the relay 40 may be mounted on the cassette 20 at an arbitrary stage.

  By the way, in the comparative example of FIG. 3, FIG. 4, in order to let the lock | rock part 22 protrudingly provided in the outer wall surface of the cassette 20 pass, the dimension between the opposing 2 surfaces (inner wall 11a, 11b) of the component accommodating hole 11 is made. Since it is set to be large, as shown in FIG. 3B, in the state where the cassette 20 is locked, a gap S2 is formed on the back portion of the cassette 20 (on the side opposite to the lock portion 22).

  This gap S2 is a useless gap in the state after the cassette 20 is assembled. When the cassette 20 is cantilevered by the lock part 22 and the locked part 12, there is an allowance for the gap S2. As a result, the cassette 20 rotates about the lock portion 22 and the locked portion 12 as a fulcrum. As a result, an excessive force acts on the lock portion 22 and the locked portion 12, and in the worst case, the lock portion 22 and the locked portion 12. There is a possibility that the lock portion 12 is damaged.

  Therefore, the present embodiment shown in FIGS. 1 and 2 has been proposed as a solution to such a fear.

  That is, as shown in FIG. 1, when the cassette 20 is passed through the component housing hole 11 from the bottom to the top in a posture rotated in a direction different from the normal mounting direction on the inner wall of the component housing hole 11. In addition, a recess 13 that allows passage of the lock portion 22 on the outer wall of the cassette 20 is provided, and the wall surfaces 14 on both sides of the recess 13 are extended to the inside of the component receiving hole 11 as wall surfaces that support the outer wall of the cassette 20. I am letting it out.

  In particular, in the present embodiment, the component receiving hole 11 and the cassette 20 form a quadrangle that is bilaterally symmetric in plan view, and the locked portion 12 is provided on the first inner wall 11a along the first side of the quadrangle, A recess 13 is formed in the second inner side wall 11b along the second side opposite to the second side wall 11b so as to allow passage of the lock portion 22 on the outer side wall of the cassette 20 with a width shorter than the length of the second side. Further, the wall surfaces on both sides of the recess 13 within the range of the length of the second side project to the inside of the component accommodation hole 11 as the wall surfaces 14 that support the outer wall of the cassette 20.

  With this configuration, as shown in FIGS. 1 (a), 2 (a), and 2 (b), the component receiving hole 11 is in a posture in which the orientation of the cassette 20 is rotated 180 degrees from the normal mounting direction. By aligning the lock portion 22 of the cassette 20 with the position of the concave portion 13, the cassette 20 can be passed through the component housing hole 11 from the lower side to the upper side (operation of arrow A).

  Next, at the stage where the cassette 20 is pulled out, as shown in FIG. 2 (c), the cassette 20 is turned to the normal mounting orientation, and in this state, as shown in FIG. The lock portion 22 inserted into the component receiving hole 11 (operation of arrow B) and protruding from the outer wall of the cassette 20 is inserted into and engaged with the locked portion 12 provided on the inner wall of the component receiving hole 11. Thereby, the cassette 20 can be attached to the component accommodation hole 11 of the box body 10.

  In this state, as shown in FIGS. 1B and 2E, the wall surfaces 14 on both sides of the recess 13 on the opposite side of the lock portion 22 project inward as the wall surfaces supporting the cassette 20, so that the cassette Unnecessary gaps cannot be formed between the part 20 and the component accommodation hole 11. That is, since the wall surfaces 14 on both sides of the recess 13 back up the cassette 20, the cassette 20 that is cantilevered by the lock portion 22 can be stably held. Therefore, when the cassette 20 is cantilevered by the lock portion 22, a rotational force is applied with the lock portion 22 as a fulcrum as shown by an arrow C in FIG. 2 (e). Even when an excessive force is applied when the relay 40 is mounted, the lock portion 22 can be prevented from being damaged.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, a combination, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

  For example, although the case where the recessed part 13 was provided in the inner wall 11b which opposes the to-be-locked part 12 was shown in the said embodiment, you may provide the recessed part 13 in the other inner walls 11c and 11d. In that case, the twist applied to the cassette 20 (rotation for changing the orientation) can be reduced, which is more advantageous.

It is a top view of embodiment of this invention, Comprising: (a) is the attitude | position at the time of cassette penetration, (b) is a figure which shows the attitude | position at the time of a lock | rock. It is an assembly procedure explanatory view of an embodiment of the present invention. It is a top view of the comparative example shown in order to demonstrate the effectiveness of this invention, (a) is the attitude | position at the time of cassette penetration, (b) is a figure which shows the attitude | position at the time of a lock | rock. It is assembly | attachment procedure explanatory drawing of the comparative example of FIG.

Explanation of symbols

10: Box main body 11: Parts receiving holes 11a, 11b: Inner side wall 12: Locked part 13: Recessed part 14: Wall face 20: Cassette (parts)
22: Lock part 30: Electric wire 40: Relay (other electric parts)

Claims (2)

The box body,
A rectangular component housing hole provided in a plan view provided through the box body;
A component housed in the component housing hole, having a rectangular shape in plan view corresponding to the component housing hole, and an electric wire connected to the lower side ;
A locking portion protruding from the outer wall of the component;
A locked part provided on the inner wall of the component housing hole;
Have,
A structure for mounting a component in an electrical connection box, in which the lock portion is inserted into and engaged with the locked portion, and the component is fixed to the component receiving hole .
The locked portion is provided in the inner wall along the first side of the quadrangle of the component housing hole with a width shorter than the length of the first side,
The lock portion is provided on the outer wall along the first side of the quadrilateral of the component with a width shorter than the length of the first side,
On the inner wall along the second side facing the first side of the component housing hole, a recess allowing passage of the lock part of the component has a width shorter than the length of the second side. Formed and the wall surfaces on both sides of the recess in the range of the length of the second side project to the inside of the component receiving hole as a wall surface supporting the outer wall of the component,
In a posture in which the component is rotated in the direction opposite to the normal mounting direction, the lock portion of the component is passed through the concave portion of the component receiving hole and penetrated from the lower side to the upper side of the component receiving hole. Then, the component is returned to a normal mounting direction, inserted into the component receiving hole from the upper side to the lower side, and the lock portion is inserted into and engaged with the locked portion. Mounting structure for parts in an electrical junction box. 2. The component mounting structure for an electrical junction box according to claim 1, wherein the component is a cassette for mounting another electrical component .

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