Electronic Devices

Abstract

The present invention relates to an electronic device, which includes: a substrate on which electronic components are mounted, and a shell made of resin that accommodates the substrate internally; the shell has a mounting portion, and the mounting portion is inserted into and engaged with a flat-plate-shaped fixing portion of a fixing object, thereby mounting the shell on the fixing portion; the mounting portion includes: a first pressing portion, the first pressing portion having a convex portion inserted into a concave portion of the inserted fixing portion; and a pair of second pressing portions, the pair of second pressing portions clamping two side surfaces of the inserted fixing portion; the top ends of the pair of second pressing portions abut against the inserted fixing portion and elastically deform in a direction of separation from each other, clamping the two side surfaces of the fixing portion in the state after the elastic deformation.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority and the benefits of Japanese Patent Application No. 2021-038617 filed with the Japan Patent Office on March 10, 2021, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The invention relates to an electronic device. Background Art

[0004] In the International Publication No. 2018 / 179262, an electronic device (electronic control device for a vehicle) is disclosed, which includes a substrate on which electronic components are mounted, and a housing made of resin that accommodates the substrate. In the electronic device, when the central plate portion of the mounting member serving as a fixed object is inserted into the support portion on the housing side, the convex portion (protrusion) of the support portion engages with the concave portion (opening portion) of the engaging portion formed on the central plate, so that the housing can be mounted on the fixed object. At this time, the central plate is guided by the inclined portion provided on the support portion, and is pressed against the protrusion in a state after elastic deformation. Thereby, shaking of the housing due to vibration transmitted from the fixed object is suppressed.

[0005] However, it is desirable to provide a gap in consideration of dimensional variations in actual products when engaging a recessed portion provided in a fixed object with a protruding portion of a housing as in the technology disclosed in International Publication No. 2018 / 179262.

[0006] However, there is a problem that it is difficult to restrict the shaking of the housing due to the gap as long as the center plate having the recessed portion is pressed against the support portion having the protruding portion as in the above-mentioned conventional technology. Summary of the invention

[0007] The present invention has been made to solve the above-mentioned problem, and an object of the present invention is to provide an electronic device capable of suppressing shaking of a casing due to vibration transmitted from a fixed object.

[0008] The electronic device involved in the first aspect of the present invention includes: a substrate on which electronic components are mounted, and a shell made of resin that accommodates the substrate internally; the shell has a mounting portion, which is inserted into and engaged with a flat-plate-shaped fixing portion of an object to be fixed, thereby mounting the shell on the fixing portion; the mounting portion includes: a first pressing portion, which has a convex portion inserted into a concave portion of the inserted fixing portion; and a pair of second pressing portions, which clamp the two side surfaces of the inserted fixing portion; the top ends of the pair of second pressing portions abut against the inserted fixing portion and elastically deform in a direction of separation from each other, thereby clamping the two side surfaces of the fixing portion in the elastically deformed state.

[0009] According to the electronic device involved in the present invention, the flat-plate-shaped fixing part of the fixed object is inserted into the mounting part arranged on the shell and engaged therewith. The mounting part is provided with a first pressing part, and the first pressing part has a convex part inserted into the concave part of the inserted fixing part. Therefore, when the fixing part is inserted into the mounting part, the convex part arranged on the first pressing part is inserted into the concave part of the fixing part and engaged therewith, so that the shell can be installed on the fixed object. In addition, the mounting part has a pair of second pressing parts, and when the fixing part is inserted into the mounting part, the top sides of the pair of second pressing parts abut against the two side surfaces of the fixing part and elastically deform in the direction of separation from each other. Therefore, at a position different from the first pressing part, the two side surfaces of the fixing part are clamped by the pair of second pressing parts, so that the shaking of the shell caused by the gap of the first pressing part can be suppressed. Thus, the shaking of the shell due to the vibration transmitted from the fixed object can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Exemplary embodiments of the present invention are described in detail based on the following drawings, in which:

[0011] Figure 1 is an electronic device according to an embodiment, and is a perspective view showing a state where the electronic device is mounted on a fixed object;

[0012] Figure 2 is an electronic device according to an embodiment, and is a bottom view showing a state where the electronic device is mounted on a fixed object;

[0013] Figure 3 is an exploded perspective view of an electronic device and a fixed object according to an embodiment;

[0014] Figure 4 is a side view of an electronic device according to an embodiment;

[0015] Figure 5 is a bottom view of the electronic device involved in the embodiment;

[0016] Figure 6 So along the Figure 4 A cross section taken along line VI-VI is a cross-sectional view of the housing according to the embodiment;

[0017] Figure 7 So along the Figure 4 The cross section along line VII-VII shows a cross-sectional view of the housing according to the embodiment;

[0018] Fig. 8A is based on Figure 7 A diagram illustrating a cross section of the second pressing portion according to the embodiment in which the second pressing portion is elastically deformed, and shows a state before the second pressing portion is elastically deformed;

[0019] Figure 8B is based on Figure 7 A diagram illustrating a cross section of the second pressing portion according to the embodiment in which the second pressing portion is elastically deformed, and shows a state in which the second pressing portion is elastically deformed;

[0020] Fig.9A So along the Figure 5 A diagram illustrating a situation in which the first pressing portion according to the embodiment undergoes elastic deformation by taking a cross section along line IX-IX of FIG. 1 , and showing a state before the first pressing portion undergoes elastic deformation;

[0021] Fig. 9B So along the Figure 5 A diagram illustrating a situation in which the first pressing portion according to the embodiment undergoes elastic deformation by taking a cross section along the line IX-IX of FIG. 1 , and showing a state in which the first pressing portion undergoes elastic deformation;

[0022] Fig. 9C So along the Figure 5 A diagram illustrating a situation in which the first pressing portion according to the embodiment undergoes elastic deformation by taking a cross section along the line IX-IX of FIG. 1 , and showing a state in which the first pressing portion undergoes elastic deformation;

[0023] Fig. 10A is based on Figure 6 A diagram illustrating a cross section of the third pressing portion according to the embodiment in which the third pressing portion is elastically deformed, and showing a state before the top end side of the third pressing portion abuts against the inner side surface of the recess; and

[0024] Fig. 10B is based on Figure 6 1 is a diagram for explaining a state in which the third pressing portion according to the embodiment undergoes elastic deformation by using the cross section shown in FIG. 1 , and shows a state in which the tip end side of the third pressing portion abuts against the inner side surface of the recessed portion. DETAILED DESCRIPTION

[0025] The following will refer to Figures 1 to 10B, an embodiment of the present invention is described. In this embodiment, for the convenience of description, the directions indicated by the up and down, left and right, and front and back arrows appropriately shown in each figure are defined as the up and down direction, left and right direction, and front and back direction of the power control device for description. In addition, in each figure, in order to make it easier to observe the drawings, some of the reference numerals are sometimes omitted.

[0026] The electronic device 1 according to the present embodiment is an electronic control device for controlling electric devices such as electric motors and suspension shock absorbers installed in a vehicle. Figures 1 to 3 As shown, the electronic device 1 includes a substrate 2 on which an electronic component 21 is mounted, a housing 3 that accommodates the substrate 2 therein, and a cover 4 fixed to the housing 3 .

[0027] The substrate 2 is a rectangular plate-shaped printed circuit board having a predetermined width in the front-back direction and the left-right direction and a predetermined thickness in the top-bottom direction. An electronic component 21 and a connector 22 are mounted on the upper surface of the substrate 2, that is, the mounting surface 2A. The electronic component 21 is a component that is driven by power supplied from a power source (e.g., a battery) mounted on the vehicle to control electrical equipment mounted on the vehicle. Figure 3 In FIG. 2 , only one electronic component 21 is mounted on the mounting surface 2A, but various electronic components are actually mounted on the mounting surface 2A. In addition, various electronic components are also mounted on the lower surface of the substrate 2.

[0028] The connector 22 is mounted on the mounting surface 2A in such a manner that the connection portion of the connector 22 faces in the direction along the mounting surface 2A. The connector 22 has a box-shaped housing 221 that is open to the front, and a plurality of connection terminals (not shown) fixed to the housing 221. The end sides of the plurality of connection terminals protruding rearward from the housing 221 are inserted and welded into through holes (not shown) that penetrate the substrate 2 from top to bottom, whereby the connector 22 is mounted on the mounting surface 2A. In the connection opening 22A (connection portion) that opens to the front of the connector 22 (housing 221), a connector on the wiring harness (cable) side connected to a power source and electrical equipment installed in the vehicle is inserted and connected. On the mounting surface 2A of the substrate 2, a wiring pattern that electrically connects the electronic components 21 and the connector 22 is formed.

[0029] The housing 3 is a rectangular box-shaped member made of resin and composed of a rear wall portion 3A, an upper wall portion 3B, a lower wall portion 3C, a left wall portion 3D, and a right wall portion 3E. The housing 3 has a housing side opening portion 31 that opens forward. The housing 3 can accommodate the substrate 2 inserted from the housing side opening portion 31 inside the housing 3. The substrate 2 is inserted into the housing 3 from the rear end side through the housing side opening portion 31, and is accommodated in a posture that is approximately parallel to the lower wall portion 3C of the housing 3.

[0030] A step portion 32 is provided in the middle of the front-to-back direction of the upper wall portion 3B of the housing 3. The step portion 32 sets the storage space inside the housing 3 so that the front storage space is larger than the rear storage space. When the substrate 2 is stored, the connector 22 is stored in the front storage space of the housing 3.

[0031] The lower wall portion 3C of the housing 3 is provided with a mounting portion 5 for mounting the housing 3 on the bracket 6. The mounting portion 5 is provided integrally with the lower wall portion 3C at the center and the front side of the lower wall portion 3C in the left-right direction. The fixing portion 62 of the bracket 6 is inserted from the top side through the insertion port 51A provided at the rear end of the mounting portion 5 (see Figure 2 as well as Figure 5 ) is inserted and engaged with the mounting portion 5. The structure of the mounting portion 5 will be described later.

[0032] like Figure 3 and Figure 4 As shown, a shell side locking portion 33 for installing a cover 4 described later is provided on the left wall portion 3D and the right wall portion 3E of the shell 3. The shell side locking portion 33 includes a claw-shaped engaging protrusion 331 and a guide wall portion 332 provided around the engaging protrusion 331, and the shell side locking portion 33 is provided at the front end portions of the left wall portion 3D and the right wall portion 3E, respectively. At the engaging protrusion 331, an engaging recess 422 of the cover 4 described later is engaged. The guide wall portion 332 has a pair of guide portions 332A, which are arranged on both sides of the engaging protrusion 331 and extend in parallel along the front-to-back direction (the insertion direction of the substrate 2) (see Figure 4 ) The cover 4 is inserted into the engaging recess 422 of the cover 4 between the pair of guide portions 332A and fixed to the housing 3 .

[0033] The cover 4 is a flat plate-shaped member having a predetermined thickness in the front-to-back direction and extending in the left-to-right direction. The cover 4 has a size that can block the housing side opening 31 of the housing 3, and is fixed to the housing 3 in a manner that blocks the housing side opening 31. A cover side opening 41 is formed at the center of the cover 4 in the left-to-right direction. The cover side opening 41 is a groove that penetrates the cover 4 in the front-to-back direction and opens upward. When the cover 4 is mounted on the housing 3, the connection opening 22A of the connector 22 is exposed from the cover side opening 41.

[0034] Cover side locking parts 42 are provided on both left and right sides of the cover 4. The cover side locking parts 42 include arm parts 421 extending from the left and right ends of the cover 4 toward the housing 3 side (rear side), and engaging recessed parts 422 formed in the arm parts 421. As an example, the engaging recessed parts 422 are through holes penetrating the arm parts 421 in the left and right directions.

[0035] The cover 4 of the above structure is installed on the housing 3 by inserting the housing 3 between the pair of left and right cover-side locking parts 42 and engaging the engaging recessed part 422 on the cover 4 side with the engaging protruding part 331 on the housing 3 side. Specifically, when the front end portion of the housing 3 is inserted between the pair of cover-side locking parts 42, the pair of arm parts 421 slide along the left wall part 3D and the right wall part 3E of the housing 3. At this time, the pair of arm parts 421 are inserted between the pair of guide parts 332A of the housing-side locking part 33 and guided to the engaging protruding part 331. When the pair of arm parts 421 slide to a position that passes over the claw of the engaging protruding part 331 while elastically deforming in a direction away from each other, the engaging protruding part 331 is inserted into the engaging recessed part 422. The cover 4 is fixed to the housing 3 by the engaging protruding part 331 and the engaging recessed part 422.

[0036] As described above, the housing 3 is fixed to the bracket 6 via the mounting portion 5. As an example, the bracket 6 is formed of a metal plate and is fixed to a frame member of the vehicle or the like using bolts 7. Figure 3 As shown, the bracket 6 includes a main body 61 having a predetermined thickness in the vertical direction and a fixing portion 62 extending from the main body 61. The main body 61 is formed in a flat plate shape that is long in the left-right direction and is arranged opposite to the lower wall 3C of the housing 3 when the housing 3 is fixed.

[0037] The fixing portion 62 extends forward from the center of the left-right direction at the front end of the main body 61. The fixing portion 62 has a predetermined thickness in the vertical direction and is formed into a rectangular flat plate shape when viewed from above. The fixing portion 62 is inserted from the top end (front end) through the insertion port 51A of the mounting portion 5 into the inner side of the mounting portion 5 provided on the lower wall portion 3C of the housing 3 (see FIG. Figure 4 as well as Figure 5 ).

[0038] like Figure 5 As shown in FIG. 1 , the fixing portion 62 has a tapered portion 621 at the base end portion as the boundary between the fixing portion 62 and the main body portion 61, the dimension of which increases from the front side toward the rear side. The two side surfaces in the left and right directions of the tapered portion 621 are fixing portion side inclined surfaces 621A. When the fixing portion 62 is inserted into the mounting portion 5, the fixing portion side inclined surfaces 621A abut against the top end side of the second pressing portion 53 described later (see FIG. 1 ). Figure 8B). A recess 63 is formed on the top end side of the fixing portion 62. As an example, the recess 63 is a through hole that penetrates the fixing portion 62 in the plate thickness direction (up and down direction), and is formed in a rectangular shape when viewed from above. Specifically, the recess 63 has a peripheral edge portion 631, which is composed of a pair of longitudinal edge portions 631A extending along the plugging and unplugging direction (front and back direction) of the fixing portion 62, and a front edge portion 631B and a rear edge portion 631C that respectively connect the front and rear ends of the pair of longitudinal edge portions 631A to each other. The recess 63 is configured so that when the fixing portion 62 is inserted into the mounting portion 5, the protrusion 551 of the first pressing portion 55 described later of the mounting portion 5 engages with the front edge portion 631B of the recess 63.

[0039] like Figure 3 As shown, the bracket 6 also has a pair of legs 64. The pair of legs 64 are integrally provided at the right front end and the left rear end of the main body 61. That is, a pair of legs 64 are provided on the diagonal line of the main body 61. The pair of legs 64 respectively have a vertical portion 641 extending obliquely downward from the peripheral portion of the main body 61, and a joint portion 642 extending horizontally from the lower end of the vertical portion 641. The joint portion 642 has a joint hole (not shown) penetrating in the plate thickness direction, and the bolt 7 is inserted through the joint hole to engage with the structure on the vehicle side. As a result, the housing 3 is fixed via the bracket 6 in a state separated from the structure on the vehicle side.

[0040] Next, the structure of the mounting portion 5 is described in detail. Figures 4 to 7 As shown in FIG. 1 , the mounting portion 5 is integrally provided on the lower wall portion 3C of the housing 3 and includes a pair of longitudinal wall portions 5A and a transverse wall portion 5B. The mounting portion 5 forms a slot-shaped slot 51 between the mounting portion 5 and the lower wall portion 3C through the pair of longitudinal wall portions 5A and the transverse wall portion 5B. The opening portion of the rear end side of the slot 51 is an insertion port 51A, and the fixing portion 62 of the bracket 6 (see FIG. 1 ) is inserted through the insertion port 51A. Figure 5 ).

[0041] like Figure 4 As shown, the pair of vertical wall portions 5A each have a base portion 52 extending downward from the lower surface of the lower wall portion 3C, and a second pressing portion 53 extending in a strip shape from the lower end of the base portion 52 to the rear side. That is, the second pressing portion 53 is cantilevered by the base portion 52. Figure 7 As shown, the second pressing portion 53 has an L-shaped vertical section in the vertical direction by a side clamping portion 531 opposite to the left and right side of the fixing portion 62 of the inserted bracket 6 and a surface covering portion 532 opposite to the surface (lower surface) of the fixing portion 62.

[0042] In a pair of second pressing parts 53, a pair of side clamping parts 531 are plate-shaped members having a predetermined thickness in the left-right direction and a height direction in the up-down direction. A pair of side clamping parts 531 are formed with pressing part side inclined surfaces 531A at the top ends of the surfaces opposite to each other, and the top ends (rear end sides) are tapered at the front end when viewed from above. The pressing part side inclined surfaces 531A abut against the opposite side of the fixed part 62 of the inserted bracket 6. The length of the pressing part side inclined surface 531A in the inclined direction is set to be shorter than the length of the fixed part side inclined surface 621A in the inclined direction formed on the tapered part 621 of the above-mentioned fixed part 62. In addition, the spacing in the left-right direction of the pair of side clamping parts 531 is set to be the same as or slightly larger than the width dimension of the front end portion of the tapered part 621 of the fixed part 62, and is set to be smaller than the width dimension of the rear end portion of the tapered part 621.

[0043] like Fig. 8A and Figure 8B As shown, when the fixing portion 62 of the bracket 6 is inserted into the mounting portion 5, the pressing portion side inclined surface 531A of the side clamping portion 531 abuts against the fixing portion side inclined surface 621A of the tapered portion 621. When the fixing portion 62 is further inserted into the depth, the pressing portion side inclined surface 531A slides along the fixing portion side inclined surface 621A, thereby the pair of second pressing portions 53 are elastically deformed in the direction of separation from each other. In this state, the elastic restoring force F1 of the second pressing portion 53 acts on the fixing portion side inclined surface 621A via the pressing portion side inclined surface 531A. The two side surfaces of the fixing portion 62 in the left and right directions are clamped by the load component F1A acting on the inner side in the left and right directions of the elastic restoring force F1 of the second pressing portion 53. In addition, the fixing portion 62 is pressed toward the rear side by the load component F1B acting in the rearward direction of the elastic restoring force F1 of the second pressing portion 53.

[0044] like Figure 5 As shown, the surface covering portion 532 is a plate-shaped member having a predetermined thickness in the vertical direction and a predetermined width from the lower end of the side clamping portion 531 toward the inner side of the slot 51. The surface covering portion 532 is configured to cover the surface (lower surface) of the fixing portion 62 when the fixing portion 62 of the bracket 6 is inserted into the mounting portion 5. In addition, at the top end side of the surface covering portion 532, the plate thickness is set to decrease toward the top end (rear end), and the vicinity of the insertion port 51A is formed in an inclined shape. As a result, the fixing portion 62 can be smoothly inserted.

[0045] like Figure 6 and Figure 7As shown, the transverse wall portion 5B of the mounting portion 5 connects the lower ends of the pair of longitudinal wall portions 5A of the above structure to each other, and is configured to cover the surface (lower surface) of the fixing portion 62 of the inserted bracket 6. The transverse wall portion 5B has a base portion 54 formed in an inverted trapezoidal shape when viewed from above, a first pressing portion 55 integrally provided on the base portion 54, and a pair of third pressing portions 56. The base portion 54 has a predetermined thickness in the vertical direction, and connects the front ends of the surface covering portions 532 of the pair of second pressing portions 53 to each other. At the front end of the base portion 54, four elongated slits are formed that penetrate the base portion 54 in the vertical direction and open to the front side. Thus, three elastic pieces (55, 56, 56) that can be elastically deformed in the vertical direction (plate thickness direction) with the base portion 54 as a fulcrum are formed in the transverse wall portion 5B. The central elastic piece among the three elastic pieces is the first pressing portion 55, and the elastic pieces arranged on the left and right sides of the first pressing portion 55 are the pair of third pressing portions 56.

[0046] The first pressing portion 55 is a long plate-shaped member having a predetermined thickness in the vertical direction and extending in the front-rear direction. The first pressing portion 55 has a claw-shaped protrusion 551 protruding toward the inside of the slot 51 and an engagement release portion 552 arranged on the front side of the protrusion 551.

[0047] like Fig.9A As shown, the convex portion 551 is formed into a substantially trapezoidal shape when viewed from the left and right sides, and has an inclined surface 551A that is inclined downward as it approaches the front side (rear side) of the insertion and extraction direction of the fixing portion 62 of the bracket 6. When the fixing portion 62 is inserted into the mounting portion 5, the top end of the fixing portion 62 slides in a manner straddling the inclined surface 551A of the convex portion 551, and the first pressing portion 55 is elastically deformed downward in the plate thickness direction (see Fig. 9B When the fixing portion 62 is inserted further into the depth, the convex portion 551 of the first pressing portion 55 is inserted into the concave portion 63 of the fixing portion 62 and engages with the front edge portion 631B of the concave portion 63 (see Fig. 9C ). Thus, even if an external force in the direction of pulling the fixing portion 62 out of the mounting portion 5 is input, the convex portion 551 is engaged with the concave portion 63, and the fixing portion 62 does not fall off the mounting portion 5. Furthermore, as described above, the fixing portion 62 is pressed toward the rear side by the elastic restoring force F1 of the pair of second pressing portions 53, so that the convex portion 551 inserted into the concave portion 63 is pressed against the front edge portion 631B of the fixing portion 62 (see Figure 8B ). Therefore, the fixing portion 62 is configured not to swing in the insertion and removal direction.

[0048] In this embodiment, the height dimension in the vertical direction of the top end of the convex portion 551 is set to be smaller than the plate thickness of the fixing portion 62 of the bracket 6. In this way, after the convex portion 551 is inserted into the concave portion 63, the first pressing portion 55 also undergoes slight elastic deformation toward the bottom side in the plate thickness direction, so that the engagement release portion 552 disposed on the front side of the convex portion 551 abuts against the top end of the fixing portion 62, and an upward load F2 acts on the top end. In other words, the first pressing portion 55 presses and supports the top end of the fixing portion 62 in the upward direction.

[0049] like Figure 7 as well as 9A to 9C As shown, the engagement release portion 552 constitutes the top end of the first pressing portion 55. A rectangular groove portion 552A is formed in the engagement release portion 552, which is open to the front side and the upper side. Therefore, the top end of a tool such as a screwdriver can be inserted into the groove portion 552A from the front side of the mounting portion 5. When the top end of the tool is inserted into the groove portion 552A, the first pressing portion 55 can be elastically deformed toward the lower side in the plate thickness direction by applying only a slight force to the tool, so that the engagement between the convex portion 551 and the concave portion 63 of the fixing portion 62 can be easily released.

[0050] In addition, the engagement release portion 552 forms the above-mentioned rectangular groove portion 552A, and the plate thickness of the side wall portion is thinned, thereby improving the click feeling for transmitting the engagement of the fixing portion 62 to the operator. That is, in the present embodiment, the top end portion of the inserted fixing portion 62 passes over the protrusion 551 while resisting the elastic restoring force of the first pressing portion 55, thereby engaging with the mounting portion 5. When the top end portion of the fixing portion 62 passes over the protrusion 551, the protrusion 551 that is applied in the upward direction by the elastic restoring force is inserted into the recess 63 of the fixing portion 62. At this time, since the engagement release portion 552 arranged in front of the protrusion 551 hits the top end portion of the fixing portion 62, the operator can confirm the engagement of the fixing portion 62 by the click sound S emitted by the engagement release portion 552 (see Fig. 9C Here, if the thickness of the side wall portion of the engagement release portion 552 is reduced, the area of ​​the impact portion is reduced compared to the case where the top end portion of the first pressing portion 55 is formed into a block shape and hits the fixed portion, thereby making it easier to generate a click sound S. As a result, the operator can easily hear the click sound S during engagement, and the click feeling can be improved.

[0051] like Figure 7As shown, the mounting portion 5 has a pair of third pressing portions 56 arranged on the left and right sides of the first pressing portion 55. The pair of third pressing portions 56 are respectively long plate-shaped members having a predetermined thickness in the up-down direction and extending from the front end portion of the base portion 54 toward the front side. The width dimension of the pair of third pressing portions 56 in the left-right direction is set to be smaller than the width dimension of the first pressing portion 55. Therefore, when a predetermined external force is applied to the pair of third pressing portions 56 from the left-right direction, the pair of third pressing portions can be elastically deformed in a direction of approaching or separating from each other. The third pressing portion 56 has a block-shaped elastic protrusion 561 protruding toward the inner side of the slot 51 on the top side. When the fixing portion 62 of the bracket 6 is inserted into the mounting portion 5, the elastic protrusion 561 abuts against the longitudinal edge portion 631A of the recess 63 of the fixing portion 62. The upper surface of the elastic protrusion 561 is formed with a guide inclined surface 561A which is inclined downward from the inner side to the outer side in the left-right direction, and the guide inclined surface 561A is arranged opposite to the inner side surface of the recessed portion 63 of the fixing portion 62 (see FIG. 10A to FIG. 10B ).

[0052] like Fig. 10A As shown, when the fixing portion 62 of the bracket 6 is inserted into the mounting portion 5, the elastic protrusion 561 is pressed down by the top end of the fixing portion 62 and elastically deforms toward the lower side in the plate thickness direction. Thereafter, if the fixing portion 62 is further inserted into the depth and the elastic protrusion 561 abuts against the longitudinal edge 631A of the recess 63 of the fixing portion 62, the elastic protrusion 561 slides along the longitudinal edge 631A of the recess 63. At this time, since at least a portion of the elastic protrusion 561 is guided by the guide inclined surface 561A and inserted into the inner side of the recess 63, the top end sides of a pair of third pressing portions 56 abut against the inner side surfaces of the recess 63 and elastically deform toward each other (see Fig. 10B ). In this state, the elastic restoring force of the third pressing portion 56 acts on the inner side surface of the recessed portion 63 via the guide inclined surface 561A of the elastic protrusion 561. The fixing portion 62 is pressed upward by the load component F4A acting in the upward direction of the elastic restoring force of the third pressing portion 56. The fixing portion 62 is pressed to both the left and right sides by the load component F4B acting to the outside in the left and right directions of the elastic restoring force of the third pressing portion 56. In other words, the pair of third pressing portions 56 supports the fixing portion 62 while pressing the inner side surface of the recessed portion 63 in the upward direction and in the left and right directions.

[0053] like Figure 5 and Figure 6As shown, the mounting portion 5 further includes a pair of housing side inclined portions 57 protruding downward from the lower wall portion 3C. The pair of housing side inclined portions 57 extend in a long strip shape along the insertion and removal direction (front-rear direction) of the fixing portion 62 of the bracket 6, and the surface (upper surface) opposite to the surface of the fixing portion 62 is inclined downward as it moves from the rear to the front. Therefore, the fixing portion 62 can be smoothly inserted.

[0054] like Figure 4 as well as Figure 5 As shown in the figure, the mounting portion 5 further includes a pair of restricting portions 58 disposed on both left and right sides of the pair of second pressing portions 53. The pair of restricting portions 58 are disposed at positions overlapping the top ends of the pair of second pressing portions 53 when viewed from the left and right directions. The pair of restricting portions 58 are blocks each including an inclined portion 581, a supporting portion 582, and a connecting portion 583, and are integrally provided on the lower wall portion 3C of the housing 3. When viewed from the side in the left and right directions, the restricting portion 58 is formed into a U-shape opened to the rear side by the inclined portion 581, the supporting portion 582, and the connecting portion 583.

[0055] The inclined portion 581 protrudes downward from the lower wall portion 3C of the housing 3 and has a predetermined thickness in the left-right direction. The inclined portion 581 extends in a long strip shape along the plugging and unplugging direction (front-back direction) of the fixing portion 62 of the bracket 6, and the opposite surface 581A opposite to the surface (upper surface) of the fixing portion 62 is formed in an inclined shape that tilts toward the lower side as it moves from the rear toward the front. On the other hand, the support portion 582 is arranged opposite to the inclined portion 581 in the up-down direction and extends in a long strip shape along the plugging and unplugging direction of the fixing portion 62. In addition, the connecting portion 583 connects the front end portion of the inclined portion 581 and the front end portion of the supporting portion 582 up and down. In the limiting portion 58 of the above-mentioned structure, a slit-shaped insertion portion 59 opening to the rear side is formed between the inclined portion 581 and the supporting portion 582.

[0056] like Fig. 9B As shown, when the fixing portion 62 of the bracket 6 is inserted into the mounting portion 5, the upper surface of the portion of the main body 61 of the bracket 6 located on the left and right sides of the fixing portion 62 abuts against and is guided by the opposite surface 581A of the inclined portion 581. In this state, the main body 61 is guided by the inclined portion 581, so that the bracket 6 is pressed downward as a whole, so that the fixing portion 62 is pressed against the surface covering portion 532 of the second pressing portion 53 when inserted into the mounting portion 5 (see arrow F3). Thereafter, when the fixing portion 62 is inserted into the specified position, the main body 61 of the bracket 6 is clamped by the insertion portion 59 of the pair of limiting portions 58, so that the insertion of the fixing portion 62 is limited. As a result, the load input from the fixing portion 62 to the second pressing portion 53 is suppressed from excessively increasing, and the second pressing portion 53 is prevented from being damaged due to overload.

[0057] (Function and Effect)

[0058] As described above, in the electronic device 1 of this embodiment, the flat plate-shaped fixing portion 62 of the bracket 6 to be fixed is inserted into and engaged with the mounting portion 5 provided on the housing 3. The mounting portion 5 is provided with a first pressing portion 55, such as Fig. 8A ,as well as 9A to 9C As shown, when the fixing portion 62 is inserted into the mounting portion 5, the convex portion 551 provided on the first pressing portion 55 is inserted into and engaged with the concave portion 63 of the fixing portion 62. Thus, the housing 3 can be mounted on the bracket 6.

[0059] In addition, a pair of second pressing portions 53 are provided on the mounting portion 5, and when the fixing portion 62 of the bracket 6 is inserted into the mounting portion 5, the top end side of the second pressing portion 53 abuts against the two side surfaces of the fixing portion 62 and elastically deforms in a direction away from each other. Therefore, the two side surfaces of the fixing portion 62 are clamped by the pair of second pressing portions 53 at a position different from the first pressing portion 55, so that the shaking of the housing caused by the gap provided in the first pressing portion 55 can be suppressed. As a result, the shaking of the housing 3 due to the vibration transmitted from the bracket 6 (and thus the vehicle) can be suppressed.

[0060] In addition, in the present embodiment, a fixing portion side inclined surface 621A is formed on the surface of the fixing portion 62 of the bracket 6 that contacts the top end side of the pair of second pressing portions 53. Fig. 8A as well as Figure 8B As shown, when the top side of the pair of second pressing parts 53 slides along the fixing part side inclined surface 621A of the fixing part 62 inserted into the mounting part 5, the elastic restoring force F1 acts on the fixing part side inclined surface 621A from the top side of the second pressing part 53. That is, the pair of second pressing parts 53 clamp the left and right sides of the fixing part 62 by the load component F1A acting inward in the left-right direction of the elastic restoring force F1 acting on the fixing part side inclined surface 621A. Thus, it is possible to restrict the housing 3 from shaking in the direction orthogonal to the plugging and unplugging direction of the fixing part 62. On the other hand, it is possible to press the convex part 551 of the first pressing part 55 against the edge of the concave part 63 of the fixing part 62 by the load component F1B acting in the rear direction of the elastic restoring force F1 acting on the fixing part side inclined surface 621A. Thus, it is possible to restrict the housing from shaking in the plugging and unplugging direction of the fixing part 62.

[0061] In addition, in this embodiment, a pressing portion side inclined surface 531A is provided on the top end side of the pair of second pressing portions 53, and the pressing portion side inclined surface 531A is made to abut against the fixing portion side inclined surface 621A. Thus, the abutting surface between the second pressing portion 53 and the fixing portion 62 can be stabilized, so that the sliding of the second pressing portion 53 becomes easy, thereby improving the operation efficiency during assembly.

[0062] In addition, in this embodiment, since a pair of limiting portions 58 are disposed on both sides of the pair of second pressing portions 53, the displacement of the pair of second pressing portions 53 when elastically deforming in the direction of separation from each other can be limited by the pair of limiting portions 58. Thus, when the fixing portion 62 is inserted, the second pressing portion 53 can be prevented from being damaged due to overload.

[0063] In addition, in the present embodiment, the pair of restricting portions 58 have inclined portions 581, and in the inclined portions 581, the opposing surface 581A opposing the surface (upper surface) of the main body portion 61 of the bracket 6 is inclined downward as it moves from the rear to the front. As a result, the main body portion 61 inserted into the restricting portion 58 is inclined along the opposing surface 581A, so that the entire bracket 6 can be pressed downward to press the surface (lower surface) of the fixing portion 62 against the second pressing portion 53 (see Fig. 9C At this time, the main body 61 is clamped by the pair of limiting parts 58, and the insertion of the fixing part 62 is limited, thereby preventing the second pressing part 53 from being damaged due to overload. In this way, by pressing the surface of the fixing part 62 against the second pressing part 53 for support, the shaking of the housing 3 in the vertical direction can be limited, and the load of the second pressing part 53 can be appropriately limited.

[0064] Furthermore, the top end of the fixing portion 62 inserted into the mounting portion 5 is pressed upward by the top end (engagement release portion 552) of the first pressing portion 55 when engaging with the protrusion 551 of the mounting portion 5 (see FIG. Fig. 9C As a result, the surface (lower surface) of the fixing portion 62 can be pressed against the second pressing portion 53, and the top end of the fixing portion 62 can be pressed against the first pressing portion 55 for support, thereby effectively limiting the shaking of the housing 3 in the vertical direction.

[0065] In addition, in this embodiment, a pair of third pressing portions 56 are arranged on the left and right sides of the first pressing portion 55, and the top ends (front ends) of the pair of third pressing portions 56 abut against the inner side surfaces of the recessed portion 63 of the inserted fixing portion 62 and elastically deform in a direction of approaching each other. Fig. 10BAs shown, an elastic protrusion 561 protruding toward the inner side of the slot hole 51 of the mounting portion 5 is provided at the top end side of the third pressing portion 56, and a guide inclined surface 561A formed on the upper surface of the elastic protrusion 561 abuts against the inner side surface of the recess 63. In this embodiment, the elastic protrusion 561 is pressed down by the inserted fixing portion 62 and elastically deformed in the plate thickness direction. Thereafter, when the elastic protrusion 561 is inserted to a position overlapping with the edge of the recess 63 of the fixing portion 62 when viewed from above, the elastic protrusion 561 is guided by the guide inclined surface 561A of the elastic protrusion 561 and inserted into the inner side of the recess 63. In this state, since a load component F4B in the direction of expanding the recess 63 from the elastic protrusion 561 acts on the left and right inner sides of the recess 63, the housing 3 can be restricted from shaking in the left and right directions by a pair of third pressing portions 56. Furthermore, the upward load component F4A acting on the left and right inner side surfaces of the recessed portion 63 can press the tip of the fixing portion 62 upward to prevent the housing 3 from shaking in the vertical direction, similarly to the first pressing portion 55 .

[0066] [Supplementary explanation]

[0067] In the above embodiment, the pair of second pressing portions 53 are elastically deformed in the direction of separation from each other by providing the fixing portion side inclined surfaces 621A on both side surfaces in the left-right direction of the base end portion of the fixing portion 62, but the present invention is not limited thereto. For example, the pair of second pressing portions may be extended in a manner of approaching each other from the rear side (near front) toward the front side (top end side) in the plugging and unplugging direction of the fixing portion, so that when the fixing portion 62 is inserted, the top end side is elastically deformed in the direction of separation from each other. In this case, the rear end portions of the pair of second pressing portions 53 are connected to the base portion 52, and the front end side (top end side) is cantilever-supported by the base portion 52.

[0068] In the above embodiment, the pair of second pressing parts 53 are elastically deformed by sliding the top ends of the pair of second pressing parts 53 along the left and right fixing part side inclined surfaces 621A, but the present invention is not limited thereto. For example, convex parts protruding outward may be provided on the left and right side surfaces of the fixing part 62, and the top ends of the pair of second pressing parts 53 may be elastically deformed in a direction of separation from each other by passing over the convex parts of the fixing part.

[0069] In the above embodiment, the pressing portion side inclined surface 531A is formed on the mutually opposing surfaces of the top end side of the pair of second pressing portions 53, but the present invention is not limited thereto. The shape of the top end side of the second pressing portion can be changed as long as it can slide on both side surfaces of the fixing portion.

[0070] In the above embodiment, the bracket 6 constitutes the fixed object, but the present invention is not limited to this. For example, a fixing portion may be directly provided on a structure such as a vehicle to attach the housing of the electronic device.

Claims

1. An electronic device, comprising: a substrate on which electronic components are mounted; a housing made of resin and accommodating the substrate therein; as well as a bracket having a flat plate-shaped fixing portion, through which the housing is mounted on the bracket, The housing has a mounting portion, into which the fixing portion is inserted; The mounting portion includes: a first pressing portion having a convex portion inserted into the recessed portion of the fixing portion; and a pair of second pressing portions, the pair of second pressing portions clamping two side surfaces of the inserted fixing portion; The convex portion is inserted into the concave portion, and the top end sides of the pair of second pressing portions abut against the inserted fixing portion and elastically deform in a direction of separation from each other. In the elastically deformed state, the shell is mounted on the bracket by clamping the two side surfaces of the fixing portion.

2. The electronic device according to claim 1, wherein: A fixing portion side inclined surface is formed on a surface of the fixing portion that abuts against the top end side of the pair of second pressing portions; When the fixing portion is inserted, the tip ends of the pair of second pressing portions come into contact with the fixing portion side inclined surface and slide along the fixing portion side inclined surface, whereby the tip ends of the pair of second pressing portions are elastically deformed in directions of being separated from each other.

3. The electronic device according to claim 2, wherein: A pressing portion side inclined surface is formed on the top end side of each of the mutually opposing surfaces of the pair of second pressing portions; When the fixing portion is inserted, the pressing portion side inclined surfaces of the pair of second pressing portions come into contact with the fixing portion side inclined surfaces of the fixing portion.

4. The electronic device according to any one of claims 1 to 3, wherein: The mounting portion includes a pair of restricting portions, which are arranged on both sides of the pair of second pressing portions and restrict the elastic deformation of the pair of second pressing portions.

5. The electronic device according to claim 4, wherein: The pair of second pressing parts respectively have a side clamping part for clamping the side surface of the inserted fixing part, and a surface covering part for covering the surface of the inserted fixing part; When the fixing portion is inserted into the mounting portion, the pair of restricting portions respectively clamp the base end portion side of the fixing portion in the plate thickness direction, and press the surface of the fixing portion against the surface covering portion of the second pressing portion in the clamped state.

6. The electronic device according to claim 1 or 2, wherein: The mounting portion has a pair of third pressing portions arranged on both sides of the first pressing portion; The tip ends of the pair of third pressing portions press the inner side surface of the recessed portion in a state where the distal ends of the pair of third pressing portions come into contact with the inner side surface of the recessed portion of the inserted fixing portion and are elastically deformed in directions approaching each other.

7. The electronic device according to claim 6, wherein: The top ends of the pair of third pressing portions are respectively provided with elastic protrusions, and the elastic protrusions are inserted into the recessed portions of the inserted fixing portions; A guiding inclined surface is formed on the surface of the elastic protrusion opposite to the inner side surface of the concave portion; When the fixing portion is inserted, the elastic protrusions of the pair of third pressing portions are inserted into the recessed portion via the guide inclined surface, whereby the tip sides of the pair of third pressing portions are elastically deformed in directions approaching each other.

Images