JP-7854967-B2 - electronic equipment

JP7854967B2JP 7854967 B2JP7854967 B2JP 7854967B2JP-7854967-B2

Inventors

竹田剛

Assignees

株式会社鷺宮製作所

Dates

Publication Date: 20260507
Application Date: 20230705

Claims (4)

An electronic device comprising: a case body having a bottom plate and opening in a direction opposite to the bottom plate; a circuit board housed in the case body; and a cover body covering the opening of the case body, The case body is formed in an overall U-shape by the bottom plate and a pair of side walls that rise from the bottom plate and face each other in predetermined opposing directions . The circuit board is supported across the pair of side walls , The pair of side walls are provided with a first locking portion that protrudes inward and is elastically deformable in the thickness direction of the side wall to lock and hold the circuit board. The cover body has a top plate facing the circuit board and a pair of cover side walls hanging down from the side edge of the top plate. The cover side wall is locked to overlap the outer surface of the side wall on the opening side of the case body, beyond the first locking portion . The cover body has a restricting surface provided inward from the cover side wall, An electronic device characterized in that the restricting surface contacts or is close to the inner surface of the side wall, thereby restricting the displacement of the side wall in the opposing direction and restricting the position of the side wall .
The electronic device according to claim 1, characterized in that the first locking portion has an elastic piece provided by cutting out the side wall in the thickness direction and which is elastically deformable in the thickness direction of the side wall, and a retaining claw provided projecting inward from the elastic piece.
The electronic device according to claim 1, characterized in that the pair of side walls are provided with a second locking portion that protrudes outward and is elastically deformable in the thickness direction of the side wall to lock and hold the cover side wall.
The pair of side walls have a tip on the opening side of the case body, a base on the bottom plate side of the case body, and a stepped portion provided at the boundary between the tip and the base, The cover body is detachably attached to the case body in the thickness direction of the circuit board, The electronic device according to claim 3, characterized in that the second locking portion is provided at the tip portion, and the position of the cover body is restricted by the downward-facing edge of the cover side wall abutting against the stepped portion.

Description

This invention relates to an electronic device. Conventionally, electronic devices that constitute controllers for electronic devices are known (see, for example, Patent Document 1). Patent Document 1 discloses a security device comprising a case composed of a bottom plate and side walls rising from the bottom plate, a substrate placed inside the case, and an elastic engaging claw that elastically deforms in the thickness direction of the side wall and snap-fits to one side of the substrate. With this configuration, the substrate can be attached to the case without using screws or other parts by employing the elastic engaging claw. Japanese Patent Publication No. 2010-251644 A perspective view showing an assembled electronic device according to the first embodiment of the present invention.An exploded perspective view of the electronic device, seen from the upper right.A perspective view of the case body that makes up the electronic device.An exploded perspective view of the electronic device, seen from the lower right.Side view of an electronic device.Top view of a circuit board that makes up an electronic device.A diagram showing the distance between the circuit board and the case body.Cross-sectional view of the electronic device in Figure 5, taken along the line A-A.Enlarged view of the main part in region A of Figure 8.A perspective view of the electronic device with the terminal block removed.Figure 10 is a front view of the electronic device as seen from the front.A perspective view of the electronic device according to the second embodiment.Top view of the electronic device in Figure 12.Top view of the protective cover that attaches to the case body.(A) is a close-up view of one of the fixing holes provided in the case body, and (B) is a close-up view of the other fixing hole. The first embodiment of the present invention will be described below with reference to Figures 1 to 11. The electronic device 1 according to the first embodiment is used, for example, as a controller for an electric valve such as an electronic expansion valve that constitutes a refrigeration cycle. As shown in Figure 1, the electronic device 1 comprises a case body 10, a circuit board 40, and a cover body 50. In the following description, the thickness direction of the circuit board 40 will be referred to as the height direction, and will be denoted as "height direction Z". One side of the height direction Z will be referred to as "upper side Z1", and the other side as "lower side Z2". Furthermore, one side of the plane extension direction of the circuit board 40 perpendicular to the height direction Z will be referred to as the front-rear direction X (a predetermined direction), and the other side as the left-right direction Y (a perpendicular direction). One side of the front-rear direction X will be referred to as "front side X1", and the other side as "rear side X2". Similarly, one side of the left-right direction Y will be referred to as "right side Y1", and the other side as "left side Y2". It should be noted that these directional definitions are for illustrative purposes only and do not necessarily correspond to the actual directions in which the electronic device 1 is used, nor do they limit the directions of the electronic device 1. For example, in the actual use of the electronic device 1, the lower Z2 portion in Figure 1 becomes the back of the electronic device 1 and is attached to the mounting object, while the upper Z1 portion becomes the front. In this case, the front-to-back direction X in Figure 1 becomes the up-to-down direction, and for example, the front X1 in Figure 1 may actually be the down side, and the rear X2 in Figure 1 may actually be the up side. As shown in Figure 2, the case body 10 is formed in a box shape with an opening on the upper side Z1 by resin molding or the like. The case body 10 has a rectangular bottom plate 11 with a longer side in the left-right direction Y. The upper side Z1 surface of the bottom plate 11 constitutes a surface that supports the circuit board 40, and as shown in Figure 3, it has a mounting surface 12 in the center in the front-rear direction X. The mounting surface 12 is formed in a rectangular shape with a longer side in the left-right direction Y. Support protrusions 13 are formed at the four corners of the mounting surface 12, rising up from the upper side Z1, and the protruding ends 13a of the support protrusions 13 abut against the lower side Z2 surface of the circuit board 40, supporting the circuit board 40 in an upward position. As shown in Figure 4, the lower side Z2 surface of the bottom plate 11 constitutes a mounting surface 14 for mounting the electronic device 1 to the object to be mounted. A mounting groove 15 opening to the lower side Z2 is formed in the center of the mounting surface 14 in the front-rear direction X. The mounting groove 15 is formed on the mounting surface 14, extending from the right end Y1 to the left end Y2, in the left-right d