JP2008283080A - Substrate structure for mounting electronic component - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a substrate structure for mounting electronic components for suppressing any influence when receiving any impact. <P>SOLUTION: This substrate structure for mounting electronic components in which a volume knob 4 mounted on an encoder switch 6 mounted on a substrate 7 is protruded from a finisher 2 is provided with a perforation part 71 where a plurality of slits 711 are intermittently arranged so that the substrate section on which the encoder switch 6 is mounted can be surrounded; and a rectangular concave 81 of a lower housing 8 in which a space for retreating the circuit board is formed at the opposite side of the side at which the encoder switch 6 of the substrate 7 is mounted. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention belongs to the technical field of an electronic component mounting board structure on which electronic components are mounted.

Conventionally, an operating device includes a switch member having a shaft support portion that supports a base end portion of a shaft member, an operation member having a substantially cylindrical mounting portion that is mounted on an end portion of the shaft member, and a mounting portion. The stopper member is fitted and attached to the stopper member, and the stopper member restricts the relative movement of the shaft member while leaving a gap for allowing the axial displacement of the shaft member, and the axial direction of the shaft member. When a predetermined load or more along the line acts to deform the locking projection, the restriction is released, and the operation member can be moved relative to the shaft member (see, for example, Patent Document 1).
Japanese Patent Laying-Open No. 2005-150040 (page 2-10, all figures)

  However, in the past, when the stopper member absorbs shock, it is deformed or destroyed, and when it loses the holding power of the operation member, it will fall off the volume switch shaft, resulting in the presence of humans. Exposing the volume switch shaft to the side to be injured may cause injury to humans, which was a problem.

  The present invention has been made paying attention to the above-mentioned problems, and an object of the present invention is to provide an electronic component mounting substrate structure capable of suppressing the influence upon impact.

  To achieve the above object, according to the present invention, an electronic component mounted on a circuit board or an electronic component mounting board structure in which a member attached to the electronic component protrudes from a device surface is mounted on the electronic component. A low-strength portion in which a plurality of slits are intermittently arranged so as to surround the printed circuit board portion, and a space for retreating the circuit board is formed on the side of the circuit board opposite to the side where the electronic components are mounted. And a rear portion of the apparatus.

  Therefore, in this invention, the influence at the time of receiving an impact can be suppressed.

  Hereinafter, an embodiment for realizing a substrate structure for mounting an electronic component according to the present invention will be described based on Example 1 corresponding to the first, second, and third aspects of the invention.

First, the configuration will be described.
FIG. 1 is a perspective view of a volume switch having an electronic component mounting substrate structure according to the first embodiment. FIG. 2 is an exploded perspective view of the volume switch including the electronic component mounting substrate structure according to the first embodiment. FIG. 3 is a cross-sectional view of a volume switch including the electronic component mounting substrate structure according to the first embodiment. FIG. 4 is an exploded cross-sectional view of a volume switch including the electronic component mounting substrate structure according to the first embodiment.

The volume switch 1 according to the first embodiment mainly includes a finisher 2, a shadow plate 3, a volume knob 4, an encoder holder 5, an encoder switch 6, a substrate 7, and a lower housing 8.
The finisher 2 is a member on the most front side of the volume switch 1, and the surface is subjected to design such as a device to be used and surface treatment. Further, the finisher 2 is provided with a hole portion 21 that is a circular hole that protrudes from the finisher 2 to the front side so that the volume knob 4 can be easily operated.

The shadow plate 3 is a structural member that covers the encoder switch 6, the substrate 7, and the like so that the finisher 2 is attached to a wide surface on the front side. Similarly to the finisher 2, the shadow plate 3 includes a hole portion 31 that is a circular hole for projecting the volume knob 4 to the front side.
The volume knob 4 is a member that an operator picks to perform an operation input by performing a rotation operation, and is attached to the front side of the encoder holder 5 and protrudes from the hole 21 of the finisher 2 to the front side.

  The encoder holder 5 is provided with an annular surface inside a cylindrical shape so that the input shaft of the encoder switch 6 is passed through the inner hole. Further, four holding ribs 51 are provided from the annular surface so as to stand on the display side. The four holding ribs 51 are provided so as to receive a radial shape, that is, a rotational direction on a wide surface, and are slidably engaged with the back side of the volume knob 4. Further, as shown in FIG. 3, the end portion on the back side of the cylindrical body is provided so as to abut against the substrate 7 or have a very small gap. And when force is added, it is set as the structure which the cyclic | annular end part of the back side of a cylindrical body contact | abuts easily with respect to the board | substrate 7. FIG. This prevents the volume knob 4 that slides with the holding rib 51 from tilting and rotating, and allows it to slide and rotate satisfactorily, thereby preventing the input shaft portion of the encoder switch 6 from tilting more than a predetermined amount. While maintaining good detection accuracy.

The encoder switch 6 engages and fixes the input shaft portion 61 that protrudes to the front side to the back side of the volume knob 4 so that the rotation direction is not shifted, and the rotation angle of the input shaft portion 61 that rotates integrally with the volume knob 4. Detect displacement.
The substrate 7 is an electronic substrate 7 on which an encoder switch 6 necessary for the volume switch 1 and other electronic components are mounted.
The lower housing 8 is a member that covers the rearmost surface of the volume switch 1, and the encoder switch 6 and the substrate 7 are accommodated in the internal space by being assembled with the shadow plate 3.

Further, the detailed structure of the volume switch 1 according to the first embodiment will be described.
As shown in FIGS. 3 and 4, the hole 21 of the finisher 2 narrows a member having a wide surface to form an inner peripheral surface, improves the appearance, and allows the rotational position deviation of the volume knob 4 to be within an allowable range. The volume knob 4 is slidable when a force is applied.
Next, a cylindrical inner tube portion 32 is provided on the back side of the hole portion 31 of the shadow plate 3 so that the hole portion 31 extends to the substrate 7. The inner cylinder portion 32 has an inner diameter that has a predetermined gap from the outer circumference of the encoder holder 5.

Engaging grooves 52 are provided at two locations on the outer periphery of the encoder holder 5, and engaging claws 321 with the engaging grooves 52 are provided on the inner wall of the inner cylindrical portion 32 of the shadow plate 3. This is a structure that engages and holds the outer periphery of the encoder holder 5 with the inner cylindrical portion 32.
Further, the end portion in the back side direction of the inner peripheral surface of the hole portion 21 of the finisher 2 has a size that comes into contact with the end portion on the front side of the cylindrical shape of the encoder holder 5.

Further, perforations 71 are provided intermittently so as to surround the encoder switch 6 of the substrate 7 and outside the outer periphery of the encoder holder 5 in a rectangular shape.
The rectangular perforated portion 71 is configured by alternately arranging linear slits or rectangular slits 711 that are bent at substantially right angles and substrate portions 712 therebetween. In addition, the strength of the perforation 71 composed of the slit 711 and the substrate portion 712 therebetween is such that when a predetermined force set in advance is applied in a direction to push the volume knob 4 to the back side, the rectangular exterior and interior are sheared. The shape of each of the slits 711 and the substrate portion 712 between them, the slit width, the number of slits, and the like are determined so as to obtain the required strength.
Further, a power supply line of the circuit pattern 72 provided on the substrate 7 is a power supply pattern 721, and the power supply pattern 721 has a circuit configuration that passes through the inside surrounded by the perforation 71.

The lower housing 8 is provided with a rectangular recess 81 that protrudes in a rectangular shape on the front side from the front side of the wide side on the back side of the volume switch 1 and forms a space that opens the front side. The rectangular shape of the rectangular recess 81 is set to a size position that surrounds the outer side of the rectangular perforation 71 on the front side.
The concave shape depth of the rectangular concave portion 81, that is, the height from the bottom surface of the inner wall surface of the rectangular concave portion 81 (distance in the front direction) is based on the amount of protrusion of the volume knob 4 protruding from the finisher 2 toward the front side. Close height (length).

Next, the operation will be described.
[Inhibiting effects when impacted]
FIG. 5 is a perspective view illustrating a partial structure of the volume switch 1 according to the first embodiment. FIG. 6 is a side view showing a partial structure of the volume switch 1 according to the first embodiment. FIG. 7 is an explanatory perspective view illustrating a partial structure in a state where the volume switch 1 according to the first embodiment receives an impact. FIG. 8 is an explanatory side view showing a partial structure in a state where the volume switch 1 according to the first embodiment receives an impact. FIG. 9 is an explanatory sectional view when the volume switch 1 according to the first embodiment receives an impact. FIG. 10 is an explanatory cross-sectional view when the volume switch 1 according to the first embodiment receives an impact.

A case where the volume switch 1 according to the first embodiment receives an impact will be described, for example, a case where the volume switch 1 is provided in the vehicle interior of the vehicle.
The volume switch 1 provided in the passenger compartment receives an impact when the vehicle receives an impact due to an accident or the like.
When a person or an object pushes the volume knob 4 very strongly for some reason even when the impact is great, due to an impact, or other than during the impact, the normal state (FIGS. 5, 6, 9) From (a)), it is damaged by impact (see FIGS. 7, 8, and 9 (b)).

In the volume switch 1, when a very strong force is applied to push the volume knob 4 to the back side, the force is first transmitted to the input shaft portion 61 of the encoder switch 6 so that the encoder switch 6 pushes the substrate 7 to the back side. Will add power.
Secondly, a very strong force that pushes the volume knob 4 to the back side is transmitted to the four holding ribs 51 of the encoder holder 5, and the force is applied so that the encoder holder 5 pushes the substrate 7 to the back side.

As a result, the substrate 7 receives a force so as to push it to the back side inside the rectangular perforation 71 provided with the encoder switch 6.
On the other hand, the substrate 7 is supported by the rectangular recess 81 of the lower housing 8 on the outer side of the rectangular perforation 71 and on the back side.
Further, the rectangular perforation portion 71 of the substrate 7 has a structure having a lower strength than the other substrate portions due to the plurality of slits 711.

Therefore, shear breakage occurs at the perforation 71, and the volume knob 4, the encoder holder 5, the encoder switch 6, and the inner part of the perforation 71 of the substrate 7 are integrally surrounded by the rectangular recess 81 of the lower housing 8. It falls into the space (see FIGS. 7, 8, and 9 (b)).
Then, the amount that the volume knob 4 protrudes from the finisher 2 to the front side becomes very small or almost disappears. Therefore, even if the occupant hits the volume switch 1, the damage is increased by the protrusion. Such a thing disappears.
This leads to an improvement in passenger protection performance in the vehicle.

  When the volume knob 4, the encoder holder 5, the encoder switch 6, and the inner part of the perforated part 71 of the substrate 7 are integrated into the space surrounded by the rectangular recess 81 of the lower housing 8, The engagement claw 321 on the inner wall of the inner cylinder part 32 and the engagement groove 52 of the encoder holder 5 are disengaged by riding or being damaged, and these parts slide so as to slide on the inner wall of the inner cylinder part 32 of the shadow plate 3. Retreats.

Further, when the inner part of the perforated part 71 of the substrate 7 integrally falls into the space surrounded by the rectangular recess 81 of the lower housing 8, the power supply pattern 721 of the circuit pattern 72 provided on the substrate 7 is cut.
Then, since the electric circuit of the volume switch 1 is in a non-energized state, it is possible to prevent an overcurrent or a short circuit upon receiving an impact, and it is possible to prevent ignition caused by this.
This also leads to an improvement in passenger protection performance in the vehicle.

Further, the volume knob 4, the encoder holder 5, the encoder switch 6, and the inner portion of the perforated portion 71 of the substrate 7, which has fallen into the space surrounded by the rectangular recess 81 of the lower housing 8, subsequently has a force to move to the front side. When received, the front end of the cylindrical shape of the encoder holder 5 comes into contact with the end of the inner peripheral surface of the hole 21 of the finisher 2 in the back side direction, and the volume knob 4, encoder holder 5, encoder switch 6. Since the inner part of the perforation 71 of the substrate 7 is not moved to the front side, it does not come off to the front side (see FIG. 10).
If dropout occurs, it is conceivable that the dropped member or the exposed member due to the drop hits the human body and affects the human body, but this is prevented in the first embodiment.
Moreover, in the volume switch 1 of Example 1, the structure which establishes these effects is achieved at a reduced cost.

Next, the effect will be described.
In the electronic component mounting substrate structure of the first embodiment, the effects listed below can be obtained.

  (1) In the electronic component mounting board structure in which the volume knob 4 attached to the encoder switch 6 mounted on the board 7 protrudes from the finisher 2, the volume knob 4 surrounds the board portion on which the encoder switch 6 is mounted. A perforated portion 71 having a plurality of slits 711 arranged intermittently, and a rectangular recess 81 of the lower housing 8 in which a space for retreating the circuit board is formed on the side opposite to the side on which the encoder switch 6 is mounted of the substrate 7 is provided. Therefore, the perforation 71 is sheared when subjected to an impact, and the volume knob 4, the encoder holder 5, and the encoder switch 6 are formed by the rectangular recess 81 along with the inside of the perforation 71 of the substrate 7. In order to reduce the protrusion from the finisher 2 and reduce the impact when receiving an impact, That.

  (2) Since the circuit pattern is configured to pass through the power supply pattern 721 of the circuit pattern 72 to be a power supply line provided on the circuit board and the inner side surrounded by the intermittent slit 711 of the perforation 71, the electric circuit of the volume switch 1 is It is possible to prevent an overcurrent or a short circuit when receiving an impact in a non-energized state, and to prevent ignition due to this.

  (3) The inner side of the perforated part 71 of the retracted volume knob 4, encoder holder 5, encoder switch 6 and substrate 7 is the inner end of the hole 21 of the finisher 2 at the front end of the cylindrical shape of the encoder holder 5 Since the inner part of the perforated part 71 of the volume knob 4, the encoder holder 5, the encoder switch 6 and the substrate 7 is not moved to the front side, it is in contact with the end part in the rear side direction of the surface. It can be prevented from moving in the protruding direction and falling off, and the influence upon impact can be further suppressed.

  As described above, the electronic component mounting substrate structure of the present invention has been described based on the first embodiment. However, the specific configuration is not limited to these embodiments, and the claims are related to each claim. Design changes and additions are allowed without departing from the scope of the invention.

For example, although the volume switch has been described in the first embodiment, other switches may be used, and electronic components other than the switches may be used.
For example, in Example 1, although the example provided in a vehicle interior was demonstrated, the structure provided in another apparatus may be sufficient.

FIG. 3 is a perspective view of a volume switch including the electronic component mounting board structure according to the first embodiment. FIG. 3 is an exploded perspective view of a volume switch including the electronic component mounting board structure according to the first embodiment. FIG. 3 is a cross-sectional view of a volume switch including the electronic component mounting substrate structure according to the first embodiment. FIG. 3 is an exploded cross-sectional view of a volume switch including the electronic component mounting substrate structure according to the first embodiment. FIG. 3 is a perspective view illustrating a partial structure of the volume switch according to the first embodiment. FIG. 3 is a side view illustrating a partial structure of the volume switch according to the first embodiment. FIG. 3 is an explanatory perspective view illustrating a partial structure in a state where the volume switch according to the first embodiment receives an impact. FIG. 3 is an explanatory side view showing a partial structure in a state where the volume switch according to the first embodiment receives an impact. FIG. 3 is an explanatory cross-sectional view when the volume switch according to the first embodiment receives an impact. FIG. 3 is an explanatory cross-sectional view when the volume switch according to the first embodiment receives an impact.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Volume switch 2 Finisher 21 Hole part 3 Shadow plate 31 Hole part 32 Inner cylinder part 321 Engagement claw 4 Volume knob 5 Encoder holder 51 Rib 52 Engagement groove 6 Encoder switch 61 Input shaft part 7 Board | substrate 71 Perforation part 711 Slit 712 Board part 72 Circuit pattern 721 Power supply pattern 8 Lower housing 81 Rectangular recess

Claims (3)

In an electronic component mounting substrate structure in which an electronic component mounted on a circuit board or a member attached to the electronic component protrudes from the device surface,
A low-strength portion in which a plurality of slits are intermittently arranged so as to surround the substrate portion on which the electronic component is mounted,
An apparatus rear portion in which a space for retracting the circuit board is formed on the opposite side of the circuit board on which the electronic component is mounted;
A substrate structure for mounting electronic components, comprising: In the electronic component mounting substrate structure according to claim 1,
The circuit pattern portion that becomes the power line provided on the circuit board is configured to pass through the inside surrounded by the intermittent slits of the low-strength portion,
A substrate structure for mounting electronic components. In the electronic component mounting substrate structure according to claim 1 or 2,
The retracted electronic component and the board portion are provided with movement limiting means for limiting movement in the protruding direction.
A substrate structure for mounting electronic components.

Images