Rattling prevention structure, electronic component module, electrical connection box, and wire harness

#This application is based on and claims priority under 35 USC 119 from Japanese Patent Application No. 2018-194890 filed on Oct. 16, 2018, the contents of which are incorporated herein by reference.

#The present invention relates to a rattling prevention structure including a bottomed cylindrical cover which includes a substantially rectangular opening portion, a block member which is inserted into the opening portion of the bottomed cylindrical cover, and an engagement mechanism which is configured to engage the block member with the opening portion. The present invention also relates to an electronic component module in which the rattling prevention structure is adopted, an electrical connection box including the electronic component module, and a wire harness including the electronic component module.

#Techniques for an electronic component module and an electrical connection box are disclosed, for example, in Patent Document 1 below. The electronic component module includes a cover, a substrate which is housed inside the cover from an outside, and a connector block (block member) which is engaged with a rectangular opening portion of the cover. The electrical connection box includes the electronic component module and a frame which is configured to house and lock the electronic component module in the frame. Also, the electrical connection box is mounted on a vehicle. Examples of the electronic component module include a relay module and the like.

#FIG. 1 is a perspective view illustrating an electronic component module according to an embodiment of the present invention.

#FIG. 2 is a perspective view of the electronic component module in FIG. 1 as viewed from an arrow A direction.

#FIG. 3 is an exploded perspective view illustrating a configuration of the electronic component module.

#An electronic component module includes a substrate on which a plurality of electronic components are mounted, a bottomed cylindrical cover which includes a substantially rectangular opening portion, a block member which is inserted into the opening portion of the cover in a state that the substrate is held, and an engagement mechanism which is configured to engage the block member with the opening portion. The rattling prevention structure is used to prevent rattling between the cover and the block member. In the rattling prevention structure, four pressing protrusions are formed at any one of four corner parts of the cover and four corner portions of the block member at the opening portion. The four pressing protrusions are configured to bend four walls of the cover inward while displacing the four corner parts of the cover outward.

#An embodiment will be described below with reference to the drawings. FIG. 1 is a perspective view illustrating an electronic component module according to an embodiment of the present invention. FIG. 2 is a perspective view of the electronic component module in FIG. 1 as viewed from an arrow A direction. FIG. 3 is an exploded perspective view illustrating a configuration of the electronic component module. FIGS. 4A and 4B illustrate a cover. FIGS. 5A to 7 illustrate a connector block. FIGS. 8A to 8D are enlarged views of main parts of the connector block in FIGS. 6 and 7. FIG. 9 is a view of the electronic component module in FIG. 2 as viewed from an arrow B direction. FIGS. 10A to 10D are enlarged views of main parts of the electronic component module in FIG. 9. FIG. 11 schematically illustrates operation of four pressing protrusions in FIGS. 9 and 10.

#In FIGS. 1 to 3, an arrow P indicates an upper-lower direction, an arrow Q indicates a left-right direction (X direction in FIG. 11), and an arrow R indicates a front-rear direction (Y direction in FIG. 11) (orientation is an example).