JP4579940B2 - Electronic component unit - Google Patents

Description

  The present invention relates to an electronic component unit in which one or more electronic components are accommodated in a casing to form a unit.

  At present, electronic devices equipped with a large number of electronic components such as switches and terminal holes are known (for example, Patent Document 1 below). In such an electronic device, each electronic component is not assembled as a separate component independent of each other, but may be assembled as an electronic component unit in which a plurality of electronic components are accommodated in a casing in advance. In such an electronic component unit, the electronic component may not be completely accommodated in the housing, but a part of the electronic component may have to be exposed to the outside. For example, an electronic component such as a switch needs to expose an operation receiving unit that receives an operation from a user to the outside. In such a case, an opening for exposing a part of the electronic component to the outside is formed in the casing of the electronic component unit in accordance with the type of electronic component to be accommodated.

JP-A-8-238992

  At this time, considering the appearance of the electronic component unit, the gap between the electronic component operation receiving portion and the opening formed in the housing is uniform, in other words, the relative positional relationship between the opening and the operation receiving portion. It is desirable that is strictly adjusted. However, conventionally, an electronic substrate on which an electronic component is mounted is not positioned with reference to an opening or a member on which the opening is formed, and thus the position of the electronic component with respect to the opening is easily displaced.

  Specifically, this problem will be described using a conventional electronic component unit as an example. 6 is a perspective view of a conventional electronic component unit 10, and FIG. 7 is a cross-sectional view taken along line BB in FIG. FIG. 8 is an exploded perspective view of the electronic component unit 10.

  The electronic component unit 10 includes an electronic substrate 12 that is configured by fixedly arranging a rotary switch 14 that is a volume switch and a headphone jack 16 on a mounting plate 18. The electronic substrate 12 is accommodated in a housing that includes an upper cover 20, a lower cover 22, and a design panel 24. However, the rotary switch 14 and the headphone jack 16 which are electronic components are not completely accommodated inside the housing, but a part of them is exposed to the outside. That is, the terminal hole formed in the front-end part which receives operation from a user among the rotary switches 14, and the front-end surface of the headphone jack 16 needs to be exposed outside. Therefore, the design panel 24 is formed with an opening 38 for projecting the front end portion of the rotary switch 14 to the outside and an opening 40 for exposing the terminal hole of the headphone jack 16 to the outside. That is, in the illustrated example of FIG. 8, the design panel 24 functions as an opening forming panel in which an opening for exposing a part of the electronic component to the outside is formed. The tip of the rotary switch 14 protruding from the opening 38 is covered with a switch knob 26 to improve its design and operability.

  Here, conventionally, positioning of the electronic substrate 12 on which the electronic components 14 and 16 are mounted has been performed with reference to the lower cover 22. That is, the lower cover 22 is formed with positioning ribs 74 on which the electronic substrate 12 is placed and positioning pins 72 to be inserted into the positioning holes 70 formed in the electronic substrate 12. Then, the electronic substrate 12 is placed on the positioning rib 74 having a certain height so that the position of the electronic substrate 12 in the height direction is inserted. Positioning in the width direction and the depth direction was performed.

  In this case, the positional error of the electronic substrate 12 with respect to the design panel 24 is added with both a fine positional error between the electronic substrate 12 and the lower cover 22 and a fine positional error between the lower cover 22 and the design panel 24. Become. As a result, in the conventional configuration, the position error of the electronic substrate 12 with respect to the design panel 24 tends to be large. As a result, the gap between the operation receiving portion of the electronic components 14 and 16 and the openings 38 and 40 formed in the design panel 24 becomes non-uniform, leading to a problem that the appearance of the electronic component unit 10 is deteriorated. It was. Further, when the position error is large, the operation receiving portion of the electronic components 14 and 16 and the switch knob 26 interfere with the peripheral edges of the openings 38 and 40 formed in the design panel 24, and the operation of the electronic components 14 and 16 is performed. In some cases, the sex could be lowered.

  Therefore, an object of the present invention is to provide an electronic component unit that can further improve the positional accuracy of the electronic component with respect to the opening forming panel.

An electronic component unit according to the present invention is an electronic component unit in which one or more electronic components are accommodated in a housing to form a unit, and the electronic substrate is configured by fixing and arranging one or more electronic components on a mounting plate; A substantially flat panel constituting a housing of the electronic component unit, an opening forming panel in which an opening for exposing a part of the electronic component to the outside is formed, and the electronic substrate is disposed below the electronic substrate, A lower cover having a substantially box shape with front and upper surfaces opened, a lower cover attached to the opening forming panel, and an upper cover disposed on the electronic substrate and covering the upper surface of the electronic substrate, includes a top cover attached to the lower cover and the opening forming panels, the said opening forming panel ribs inserted in the formed in the mounting plate groove, and, protruding member provided on the mounting plate are inserted Less groove Also made one, and sites for regulating the widthwise position of the electronic substrate relative to the opening formed panel, a groove for inserting portion which is a part is inserted in the mounting plate, the height direction distance of the insertion portion consists substantially the same second groove and the height direction of the thickness includes a portion for restricting the height direction position of the electronic substrate relative to the opening formed panel, a, the lower cover, in the width direction formed on the mounting plate And a pin that regulates a position in the depth direction of the electronic substrate by being inserted into a long elongated hole.

In another preferred embodiment, prior Symbol second grooves are desirably constituted by a pair of ribs which are formed to face in the height direction. It is also desirable that at least one of the pair of ribs is formed with a crushing rib that protrudes toward the other and whose front end surface is crushed by the insertion portion inserted between the pair of ribs.

  According to the present invention, the opening forming panel has position restricting means for restricting the position of the electronic substrate with respect to the opening forming panel by engaging with the electronic substrate, and the electronic substrate is positioned with reference to the opening forming panel. The As a result, since an assembly error with other members is not superimposed between the electronic substrate and the opening forming panel, the positional accuracy of the switch with respect to the opening forming panel can be further improved.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of an electronic component unit 10 according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the design panel 24 and the electronic substrate 12 as viewed from the other direction, and FIG. 3 is a perspective view when the design panel 24 and the electronic substrate 12 are assembled.

  The electronic component unit 10 is a device in which a rotary switch 14 and a headphone jack 16 that are electronic components are housed in a casing. The rotary switch 14 and the headphone jack 16 are fixedly arranged in advance on a mounting plate 18 having a predetermined thickness and are unitized as an electronic board 12. The electronic component unit 10 is configured by housing the unitized electronic substrate 12 in a casing including the upper cover 20, the lower cover 22, and the design panel 24. Hereinafter, the electronic component unit 10 will be described in detail.

  As described above, the electronic board 12 is obtained by fixedly arranging the rotary switch 14 and the headphone jack 16 on the mounting plate 18 having a predetermined thickness. The rotary switch 14 and the headphone jack 16 are fixedly arranged on the mounting plate 18 after being positioned precisely so as to be parallel to each other with a predetermined distance therebetween. Therefore, if the relative positional relationship between the electronic substrate 12 and the design panel 24 is strictly ensured, the relative positional relationship between the rotary switch 14 and the design panel 24 is automatically secured. In the following description, the major axis direction (the drawing L direction) of the rotary switch 14 is the depth direction, and the adjacent direction (the drawing W direction) between the rotary switch 14 and the headphone jack 16 is the width direction, the depth direction, and the width direction. A direction (H direction in the drawing) orthogonal to is called a height direction.

  The mounting plate 18 on which the rotary switch 14 and the headphone jack 16 are mounted is a substantially L-shaped plate material when viewed from above. A first groove 32 extending in the depth direction is formed on the front end surface of the mounting plate 18. The first groove 32 is a groove used for positioning in the width direction of the electronic substrate 12, and is a groove into which a first rib 50 protruding from the design panel 24 described later is inserted. In addition, a total of two long holes 30 that are long in the width direction are formed in the mounting plate 18 in the vicinity of the rotary switch 14 and in the vicinity of the headphone jack 16. These two long holes 30 are long holes 30 used for positioning the electronic board 12 in the depth direction, and are holes into which positioning pins 36 protruding from the lower cover 22 described later are inserted.

  The housing of the electronic component unit 10 includes an upper cover 20, a lower cover 22, and a design panel 24. The upper cover 20 is a member disposed on the upper side of the electronic substrate 12, and an upper fitting portion 20 a to be fitted to the lower cover 22 and the design panel 24 is formed at an end portion thereof.

  The lower cover 22 is a member disposed on the lower side of the electronic substrate 12 and is a substantially box-shaped member having an open front surface and upper surface. Upper end fitting portions 22 a to be fitted to the fitting portions of the upper cover 20 and the design panel 24 are formed at the end portions of the left and right side walls of the lower cover 22. In addition, a large notch 34 is formed on the back surface so that the rear end of the rotary switch 14 can be projected to the outside. Further, from the bottom surface of the upper cover 20, two positioning pins 36 are formed so as to protrude into the two long holes 30 formed in the mounting plate 18. The positioning pin 36 is a cylindrical member having a diameter substantially the same as the width in the minor axis direction (width in the depth direction) of each long hole 30. In other words, the width of each elongated hole 30 in the depth direction and the width of the positioning pin 36 in the depth direction are substantially the same. Therefore, when the positioning pin 36 is inserted into the long hole 30 of the mounting plate 18, the mounting plate 18 cannot move in the depth direction with respect to the lower cover 22, but in the depth direction with respect to the lower cover 22 of the mounting plate 18. The position is completely regulated. Thereby, the mounting plate 18 is positioned in the depth direction.

  The design panel 24 is a member disposed on the front surface of the electronic substrate 12 and functions as an opening forming panel in which openings 38 and 40 for exposing a part of the electronic components 14 and 16 to the outside are formed. The design panel 24 is formed with two openings 38 and 40 for exposing part of the rotary switch 14 and the headphone jack 16 which are electronic components. That is, the design panel 24 has a switch opening 38 for projecting the front end 28 of the rotary switch 14 that receives an operation from a user to the outside, and a terminal opening 29 for exposing a terminal hole 29 formed in the headphone jack 16 to the outside. 40 is formed. Each of the two openings 38 and 40 is a circular through hole, and the periphery thereof is a recess 42 that is recessed toward the back compared to other parts. The front end portion 28 of the rotary switch 14 protruding from the switch opening 38 is covered with a switch knob 26 that is a cover body, so that the design and operability can be improved.

  Here, the two openings 38 and 40 formed in the design panel 24 are both compatible with each other so that the gap with the corresponding electronic component (the rotary switch 14 or the headphone jack 16) is uniform. The electronic parts 14 and 16 are designed so as to be located at the center of the opening. However, there may be a deviation in the relative positional relationship between the electronic components 14 and 16 and the openings 38 and 40 due to an assembly error of each member. In such a case, there is a problem that the gap between the two becomes non-uniform and the appearance is lowered. In addition, when the positional deviation between the two is large, a part of the electronic parts 14 and 16 and the switch knob 26 attached to the electronic parts interferes with the peripheral edges of the openings 38 and 40, and the electronic parts 14 and 16. The operability may be lowered. Therefore, in order to minimize the assembly error, in the present embodiment, the design panel 24 is provided with a plurality of ribs that function as position restricting means, and the electronic substrate 12 with respect to the design panel 24 using the plurality of ribs. The positioning is aimed at.

  Specifically, in the present embodiment, a first rib 50 that is long in the height direction and protrudes toward the back side is formed between the switch opening 38 and the terminal opening 40. The first rib 50 is a rib that is used for positioning in the width direction of the electronic substrate 12 and is inserted into the first groove 32 formed in the mounting plate 18. The thickness (width direction distance) of the first rib 50 is substantially the same as the width (width direction distance) of the first groove 32 formed in the mounting plate 18. Further, in order to facilitate insertion into the first groove 32, a taper is formed at the tip of the first rib 50. When the first rib 50 is inserted into the first groove 32, the distance in the width direction between the first rib 50 and the electronic board 12 is substantially the same in the width direction with respect to the design panel 24. Cannot move. Thus, the electronic substrate 12 is positioned in the width direction with the design panel 24 as a reference.

  Further, in the design panel 24, a first rib pair 52a including an upper rib 54 and a lower rib 56 that are opposed to each other in the height direction is formed below the switch opening 38. Further, a second rib pair 52b composed of an upper rib 54 and a lower rib 56 facing each other in the height direction is also formed below the terminal opening 40. The first rib pair 52 a and the second rib pair 52 b are ribs used for positioning the mounting plate 18, and by extension, the electronic substrate 12 in the height direction. The first rib pair 52a and the second rib pair 52b are formed at substantially the same height, and the configuration is substantially the same.

  4 is a front view of the rib pair 52, and FIG. 5 is a cross-sectional view taken along line AA in FIG. The rib pair 52 includes an upper rib 54 and a lower rib 56 that face each other at a predetermined interval in the height direction. The opposing width (height direction distance) h <b> 1 of the upper rib 54 and the lower rib 56 is slightly larger than the thickness of the mounting plate 18. However, the distance h2 from the lower end of the crushing rib 58 to be described later to the upper surface of the lower rib 56 is set to be slightly smaller than the thickness of the mounting plate 18. Here, it can be said that a groove 60 slightly smaller than the thickness of the mounting plate 18 is formed between the upper rib 54 and the lower rib 56 facing each other. In this embodiment, the electronic substrate 12 is positioned in the height direction by inserting the front end face of the mounting plate 18 into the groove 60 formed by the upper rib 54 and the lower rib 56. Tapers 54 a and 56 a that are inclined toward the inside of the groove 60 are formed at the tips of the upper rib 54 and the lower rib 56 in order to facilitate the insertion of the mounting plate 18.

  Further, a crushing rib 58 having a triangular cross section is formed on the bottom surface of the upper rib 54, in other words, the surface of the upper rib 54 that faces the lower rib 56, extending in the depth direction. The crushing rib 58 is crushed by the mounting plate 18 inserted between the upper rib 54 and the lower rib 56, so that the mounting plate 18 and the upper rib 54, and the mounting plate 18 and the lower rib The play which occurs between 56 and 56 is prevented. That is, since the distance h2 from the lower end of the crushing rib 58 to the upper surface of the lower rib 56 is slightly smaller than the thickness of the mounting plate 18, the mounting plate inserted between the upper rib 54 and the lower rib 56. 18 interferes with the crushing rib 58. When the mounting plate 18 is further inserted while interfering with the crushing rib 58, the tip of the crushing rib 58 is pressed by the mounting plate 18, and the sharp tip of the crushing rib 58 is crushed. In this case, the bottom surface of the mounting plate 18 is in close contact with the lower rib 56, and the upper surface of the mounting plate 18 is in close contact with the crushing rib 58 without a gap. As a result, rattling between the mounting plate 18 and the upper and lower ribs 54 and 56 is prevented. The mounting plate 18 and thus the electronic board 12 are moved in the height direction with respect to the design panel 24 by inserting the mounting plate 18 between the upper rib 54 and the lower rib 56 without rattling. The electronic substrate 12 cannot be moved and positioned in the height direction.

  Next, the assembly flow of the electronic component unit 10 will be briefly described. When assembling the electronic component unit 10, the rotary switch 14 and the headphone jack 16, which are electronic components, are mounted and fixed on the mounting plate 18 in advance to constitute the electronic substrate 12. Subsequently, the electronic substrate 12 is assembled to the design panel 24. That is, the first rib 50 formed on the design panel 24 is inserted into and engaged with the first groove 32 formed on the mounting plate 18. At the same time, the front end portion of the mounting plate 18 is inserted and engaged between the upper rib 54 and the lower rib 56 formed on the design panel 24. Positioning of the electronic board 12 in the width direction is achieved by the engagement of the first groove 32 and the first rib 50, and positioning of the electronic board 12 in the height direction is performed by the engagement of the mounting plate 18 and the rib pairs 52a and 52b. However, the design panel 24 is used as a reference. However, at this time, the electronic substrate 12 is movable in the depth direction with respect to the design panel 24.

  Therefore, next, the lower cover 22 is assembled to the design panel 24. At this time, the two positioning pins 36 formed on the lower cover 22 are inserted into the long holes 30 formed on the mounting plate 18. Thereby, the movement of the electronic substrate 12 in the depth direction is restricted, and positioning in the depth direction is also achieved. That is, at this time, the electronic substrate 12 is positioned in the height direction, the width direction, and the depth direction. Finally, when the upper cover 20 is fitted to the lower cover 22 and the design panel 24, the assembly work of the electronic component unit 10 is completed.

  As is apparent from the above description, in the present embodiment, the design panel 24 is provided with position regulation means (ribs) that regulate the position in the width direction and the height direction of the electronic substrate 12, and the electronic substrate 12 is based on the design panel 24. Positioning in the width direction and height direction is performed. As a result, the position error between the design panel 24 and the mounting plate 18 in the width direction and the height direction causes the design panel 24 and the lower cover 22 or the upper cover 20, or the mounting plate 18 and the lower cover 22 or the upper cover 20. Assembling errors that occur between and are not superimposed. As a result, the positional error between the design panel 24 and the mounting plate 18 in the width direction and the height direction is reduced as compared with the conventional case, and the positional accuracy between the electronic component and the opening formed in the design panel is improved. The appearance of the electronic component unit 10 and the operability of the electronic component are improved.

  Note that the above description is an example, and if the positioning of the mounting plate 18 with respect to the design panel 24 is achieved by engaging a part of the mounting plate 18 with a part of the design panel 24, the description is appropriately changed. It is good also as a structure. For example, in this embodiment, the mounting plate is positioned in the width direction by inserting the rib formed on the design panel 24 into the groove formed on the mounting plate 18, but this is the opposite. May be. That is, a certain protruding member may be provided on the mounting plate 18 and a groove into which the protruding member is inserted may be formed on the design panel 24.

It is a disassembled perspective view of the electronic component unit which is embodiment of this invention. It is a disassembled perspective view of a design panel and an electronic substrate. It is a perspective view at the time of attaching an electronic substrate to a design panel. It is a schematic front view of a rib pair. It is AA sectional drawing in FIG. It is a perspective view of the conventional electronic component unit. It is BB sectional drawing in FIG. It is a disassembled perspective view of the conventional electronic component unit.

Explanation of symbols

  10 electronic component unit, 12 electronic board, 14 rotary switch, 16 headphone jack, 18 mounting board, 20 upper cover, 22 lower cover, 24 design panel, 26 switch knob, 30 long hole, 32 first groove, 36 positioning Pin, 38 Opening for switch, 40 Opening for terminal, 50 First rib, 52a, 52b Rib pair, 54 Upper rib, 56 Lower rib, 58 Crushing rib.

Claims (3)

An electronic component unit in which one or more electronic components are accommodated in a casing to form a unit,
An electronic substrate configured by fixing and arranging one or more electronic components on a mounting plate;
An approximately flat panel constituting a housing of the electronic component unit, an opening forming panel in which an opening for exposing a part of the electronic component to the outside is formed;
A substantially box-shaped lower cover that is disposed on the lower side of the electronic substrate and has an open front surface and an upper surface, and a lower cover that is attached to the opening forming panel;
An upper cover that is disposed on the upper side of the electronic substrate and covers the upper surface of the electronic substrate, the upper cover being attached to the lower cover and the opening forming panel;
With
The opening forming panel is:
A portion that includes at least one of a rib that is inserted into a groove formed on the mounting plate and a groove into which a protruding member provided on the mounting plate is inserted, and a portion that regulates the position in the width direction of the electronic substrate with respect to the opening forming panel; ,
It is a groove into which the insertion part which is a part of the mounting plate is inserted, and the height direction distance is substantially the same as the thickness in the height direction of the insertion part, and is a second groove. A part that regulates the position in the height direction;
Including
The lower cover by being inserted into elongated long hole in the width direction formed in the mounting plate, and a pin for regulating the depth direction position of the electronic substrate,
With
An electronic component unit characterized by that. The electronic component unit according to claim 1,
Said 2nd groove | channel is comprised with a pair of rib formed facing in a height direction, The electronic component unit characterized by the above-mentioned. The electronic component unit according to claim 2,
At least one of the pair of ribs is formed with a crushing rib that protrudes toward the other and whose tip surface is crushed by the insertion portion inserted between the pair of ribs. Parts unit.

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