JP2014220635A - Electronic apparatus and air tightness inspection method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology that reduces a thickness of an electronic apparatus in a thickness direction.SOLUTION: A smartphone 10 (an electronic apparatus) includes: a battery housing 13 (a housing); a sheet 16a; and a microphone 15g (a conversion device). The battery housing 13 (the housing) has a flat shape and includes: a battery housing rear surface 13b (a surface) substantially perpendicular to a thickness direction T of the battery housing 13; and a ventilation groove 13d (a groove) extending on the battery housing rear surface 13b in the direction substantially perpendicular to the thickness direction T. The sheet 16a covers the ventilation groove 13d thereby forming a duct 18 (a first ventilation path) extending in the direction substantially perpendicular to the thickness direction T. The microphone 15g converts a sound wave transmitted through the duct 18 into an electric signal.

Description

  The present invention relates to an electronic device and an airtight inspection method thereof.

  As this type of technology, Patent Document 1 discloses a wireless communication including a display unit casing case provided with a liquid crystal panel and an operation unit casing case slidably attached to the display unit casing case. A terminal device is disclosed. A sound collection hole for collecting external sound waves is formed on the side surface of the display unit case. A tubular duct connected to the sound collecting hole is formed in the display unit housing case, and a microphone is accommodated. With the above configuration, the external sound wave collected by the sound collection hole is transmitted to the microphone through the tubular duct. The tubular duct extends in a direction orthogonal to the thickness direction of the display unit housing case.

JP 2010-130106 A

  The configuration of Patent Document 1 leaves room for improvement in terms of thickness reduction.

  An object of the present invention is to provide a technique for thinning an electronic device.

  A casing having a flat shape, and having a surface substantially orthogonal to the thickness direction of the casing and a groove extending on the surface in a direction substantially orthogonal to the thickness direction Covering the housing and the groove to form a first air passage extending in a direction substantially perpendicular to the thickness direction, a sheet or film, and an acoustic signal propagating through the first air passage There is provided an electronic device including a conversion element for converting into the above.

  A casing having a flat shape, and having a surface substantially orthogonal to the thickness direction of the casing and a groove extending on the surface in a direction substantially orthogonal to the thickness direction Covering the housing and the groove to form a first air passage extending in a direction substantially perpendicular to the thickness direction, a sheet or film, and an acoustic signal propagating through the first air passage A conversion element that converts the second ventilation path between the first ventilation path and the conversion element so that the sound wave propagating through the first ventilation path can reach the conversion element. A method for airtight inspection of an electronic device having a path, in order: (1) performing airtight inspection by closing the second air passage before covering the groove with the sheet or film; and (2) airtight inspection. Thereafter, the second air passage is unblocked, and the groove is formed by the sheet or film. Cover, airtightness inspection method of an electronic device is provided.

  According to the above configuration, the electronic device can be thinned in the thickness direction.

FIG. 1 is a partial cross-sectional view of a smartphone. (First embodiment) FIG. 2 is an exploded perspective view of the smartphone. (Second embodiment) FIG. 3 is a partial cross-sectional view of the smartphone. (Second embodiment) FIG. 4 is a partial cross-sectional view of the smartphone. (Third embodiment) FIG. 5 is a partial cross-sectional view of the smartphone. (Third embodiment) FIG. 6 is a partial cross-sectional view of the smartphone. (Fourth embodiment) FIG. 7 is an exploded perspective view of the smartphone. (Fourth embodiment)

(First embodiment)
As shown in FIG. 1, the smartphone 1 (electronic device) includes a housing 2 having a flat shape, a sheet 3 made of polyimide, for example, and a microphone 4 (conversion element).

  The housing 2 has a surface 5 that is substantially orthogonal to the thickness direction of the housing 2 and a groove 6 that extends on the surface 5 in a direction substantially orthogonal to the thickness direction.

  The sheet 3 covers the groove 6 to form a duct 7 (first air passage) extending in a direction substantially orthogonal to the thickness direction.

  The microphone 4 is a conversion element that converts sound waves propagating through the duct 7 into electrical signals.

  According to the above configuration, the smartphone 1 can be thinned in the thickness direction.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS.

  As shown in FIGS. 2 and 3, the smartphone 10 (electronic device) includes a screen 11, a screen housing 12, a battery housing 13 (housing), a back cover 14 (cover), and a microphone assembly 15. , A duct assembly 16. The smartphone 10 is detachably mounted with a battery 17 (battery).

  As shown in FIG. 3, the screen 11, the screen casing 12, the battery casing 13, and the back cover 14 are stacked in this order. The microphone assembly 15 is mounted between the screen casing 12 and the battery casing 13. The duct assembly 16 is mounted between the battery housing 13 and the back cover 14.

  The screen 11, the screen casing 12, the battery casing 13, and the back cover 14 are all flat. That is, the screen 11, the screen casing 12, the battery casing 13, and the back cover 14 are all thin plates. Therefore, the smartphone 10 itself has a flat shape or a thin plate shape.

  Here, with reference to FIG. 2 and FIG. 3, “thickness direction T”, “longitudinal direction L”, and “short direction S” are defined. The thickness direction T is the thickness direction of the smartphone 10. Of the thickness direction T, the direction in which the battery casing 13 is viewed from the screen casing 12 is the thickness rear direction, and the direction in which the screen casing 12 is viewed from the battery casing 13 is the thickness front direction. When the smartphone 10 is viewed in the thickness direction T, the smartphone 10 has a long side and a short side shorter than the long side. That is, the smartphone 10 has a longitudinal direction L and a lateral direction S when viewed in the thickness direction T. In the longitudinal direction L, a direction away from the center of the smartphone 10 is defined as a longitudinal separation direction, and a direction approaching the center of the smartphone 10 is defined as a longitudinal proximity direction. Similarly, in the short direction S, a direction away from the center of the smartphone 10 is defined as a short separation direction, and a direction approaching the center of the smartphone 10 is defined as a short proximity direction.

  The screen casing 12, the battery casing 13, and the back cover 14 are all resin molded products formed by injection molding.

  The screen 11 is a liquid crystal display, for example.

  The screen housing 12 is a housing that holds the screen 11. The screen housing 12 has a screen housing front surface 12a facing the thickness front surface direction and a screen housing back surface 12b facing the thickness back surface direction. A screen casing first receiving recess 12c in which the screen 11 is stored is formed on the screen casing front surface 12a. A screen housing second housing recess 12d for housing the microphone assembly 15 is formed on the screen housing back surface 12b. An annular seal member 12e is mounted on the screen housing rear surface 12b. The seal member 12 e realizes waterproofing of the space W between the screen housing 12 and the battery housing 13.

  The battery housing 13 is a housing that detachably holds the battery 17. The battery housing 13 has a battery housing front surface 13a facing the thickness front surface, a battery housing back surface 13b (surface) facing the thickness rear surface direction, and a battery housing side surface 13c facing the longitudinal separation direction. A ventilation groove 13d (groove), a sheet installation portion 13e, and a battery housing recess 13p (battery housing recess) are formed in the battery housing back surface 13b. The ventilation groove 13d is formed to extend in the longitudinal direction L. The ventilation groove 13d is formed up to the battery housing side surface 13c. The battery housing 13 has a ventilation groove bottom surface 13f that is a boundary on the front side in the thickness of the ventilation groove 13d, a pair of ventilation groove side surfaces 13g that is a boundary in the short direction S of the ventilation groove 13d, and a longitudinal proximity of the ventilation groove 13d. A ventilation groove end face 13h serving as a boundary on the direction side. The seat installation portion 13e is a portion where the duct assembly 16 is installed. The sheet installation portion 13e is formed by slightly denting the battery housing back surface 13b in the thickness front direction. The sheet installation portion 13e is formed so as to surround the ventilation groove 13d when viewed in the thickness front direction. The battery housing 13 further has a communication air passage 13i. The communication air passage 13i is formed extending in the thickness direction T. The communication ventilation path 13i is formed up to the battery housing front surface 13a and the ventilation groove bottom surface 13f. The communication ventilation path 13i is formed between the battery housing front surface 13a and the ventilation groove bottom surface 13f. The communication air passage 13i is formed in a substantially circular shape when viewed in the thickness front direction. The communication ventilation path 13i is connected to the end portion 13j on the side in the longitudinal proximity direction of the ventilation groove bottom surface 13f. The battery housing recess 13 p is a recess for housing the battery 17.

  The back cover 14 is a cover for covering the battery 17. The back cover 14 includes a cover main body portion 14a and a cover annular portion 14b. The cover body 14a is a thin plate that is orthogonal to the thickness direction T. The cover annular portion 14b is an annular portion protruding in the thickness front direction from the peripheral edge of the cover main body portion 14a. A cover sound hole 14c is formed in the cover annular portion 14b. The cover sound hole 14 c faces the ventilation groove 13 d of the battery housing 13 in the longitudinal direction L.

  The microphone assembly 15 includes a waterproof double-sided tape 15a, a breathable sheet 15b, a double-sided tape 15c, a cushion sheet 15d, a reinforcing plate 15e, an FPC 15f (Flexible Printed Circuits), a microphone 15g (converting element), and a cushion. The sheet 15h is laminated.

  The waterproof double-sided tape 15a is a double-sided tape having waterproofness. A ventilation hole is formed in the waterproof double-sided tape 15a. The breathable sheet 15b is a sheet having dust resistance, waterproofness, and breathability. A ventilation hole is formed in the double-sided tape 15c. The cushion sheet 15d is a sheet having cushioning properties. A vent hole is formed in the cushion sheet 15d. The reinforcing plate 15e is adhered to the FPC 15f to ensure the rigidity of the FPC 15f. A vent hole is formed in the reinforcing plate 15e. A vent hole is formed in the FPC 15f. The microphone 15g is an element that converts sound waves into electrical signals. The microphone 15g is fixed to the FPC 15f. The microphone 15g is electrically connected to the FPC 15f. The cushion sheet 15h is a sheet having cushioning properties.

  The duct assembly 16 includes a sheet 16a and a double-sided tape 16b. The sheet 16a is attached to the sheet installation part 13e of the battery housing 13 via the double-sided tape 16b. The sheet 16a covers the ventilation groove 13d. The sheet 18a covers the ventilation groove 13d, whereby the duct 18 (first ventilation path, sound collection path, sonic ventilation path) is formed. The duct 18 extends in the longitudinal direction L similarly to the ventilation groove 13d. Accordingly, the duct 18 is open in the longitudinal direction L. The duct 18 is open to the battery housing side surface 13c. In the longitudinal direction L, the duct 18 communicates with the cover sound hole 14c. Therefore, the duct 18 communicates with the outside of the smartphone 10. The duct 18 is not blocked by the cover annular portion 14 b of the back cover 14. The duct 18 communicates with the communication air passage 13i. The duct assembly 16 is covered with a back cover 14.

  Then, due to sound generation by the user of the smartphone 10, sound waves generated outside the smartphone 10 are, in order, the cover sound hole 14 c of the back cover 14, the duct 18, the communication air passage 13 i, and the microphone assembly 15. It propagates through the vent holes of each element and reaches the microphone 15g.

  Although the second embodiment has been described above, the second embodiment has the following features.

(1) The smartphone 10 (electronic device) includes a battery housing 13 (housing), a sheet 16a, and a microphone 15g (conversion element). The battery housing 13 is a flat battery housing 13 (housing), a battery housing back surface 13b (surface) substantially orthogonal to the thickness direction T of the battery housing 13, and a battery housing. A ventilation groove 13d (groove) extending in a direction substantially orthogonal to the thickness direction T on the body back surface 13b. The sheet 16a covers the ventilation groove 13d to form a duct 18 (first ventilation path) extending in a direction substantially orthogonal to the thickness direction T. The microphone 15g converts sound waves propagating through the duct 18 into electrical signals. According to the above configuration, the smartphone 10 can be thinned in the thickness direction T.

  Note that a film may be used instead of the sheet 16a to cover the ventilation groove 13d.

(2) The duct 18 communicates with the outside of the smartphone 10. According to the above configuration, sound waves generated outside are taken into the duct 18.

(3) The duct 18 opens in a direction substantially orthogonal to the thickness direction T. According to the above configuration, since the opening of the duct 18 is located in a place where it is difficult to see, the appearance of the smartphone 10 is improved.

(4) The battery housing 13 has a battery housing recess 13p (battery housing recess) capable of housing the battery 17 (battery). The smartphone 10 further includes a back cover 14 (cover) that covers the battery 17 housed in the battery housing recess 13p. The back cover 14 covers the sheet 16a. According to the above structure, since the sheet | seat 16a is not exposed, the external appearance of the smart phone 10 becomes favorable.

(5) The battery housing 13 has a communication air passage 13i (second air passage) between the duct 18 and the microphone 15g so that the sound wave propagating through the duct 18 can reach the microphone 15g. According to the above configuration, the sound wave propagating through the duct 18 can reach the microphone 15g.

(6) The communication air passage 13 i extends in a direction substantially orthogonal to the longitudinal direction of the duct 18.

(7) The communication vent 13i extends in the thickness direction T.

(8) The duct 18, the communication air passage 13i, and the microphone 15g are arranged in this order in the thickness direction T.

(Third embodiment)
Next, a third embodiment will be described with reference to FIGS. 4 and 5. Here, the present embodiment will be described with a focus on differences from the second embodiment, and a duplicate description will be omitted as appropriate. In addition, in principle, the same reference numerals are assigned to components corresponding to the components of the second embodiment.

  As shown in FIG. 3, in the second embodiment, when the airtight inspection of the space W is performed, the space W and the outside communicate with each other through the air-permeable sheet 15b, the duct 18, and the like. Have difficulty. Therefore, in this embodiment, in order to perform the airtight inspection, (1) before covering the ventilation groove 13d with the sheet 16a, as shown in FIG. (2) After the airtight inspection, the communication ventilation path 13i is unblocked and the ventilation groove 13d is covered with the sheet 16a as shown in FIG. According to this method, the airtight inspection of the space W can be executed without any problem.

  As shown in FIG. 4, in the above airtightness inspection method, the pressure-sensitive adhesive sheet 19 is used to close the communication air passage 13i. Further, the communication air passage 13i is formed slightly away from the end face 13h in the longitudinal direction so that the communication air passage 13i can be reliably closed by the adhesive sheet 19. 4 and 5, the back cover 14 is not drawn. The back cover 14 is attached to the battery housing 13 after the airtightness inspection is completed, the duct assembly 16 is attached to the battery housing 13, and the battery 17 is mounted on the battery housing 13.

(Fourth embodiment)
Next, a fourth embodiment will be described with reference to FIGS. 6 and 7. Here, the present embodiment will be described with a focus on differences from the second embodiment, and a duplicate description will be omitted as appropriate. In addition, in principle, the same reference numerals are assigned to components corresponding to the components of the second embodiment.

  In the present embodiment, the battery housing 13 has ribs 13k. The ribs 13k are disposed at the end portion 13m on the longitudinal separation direction side of the ventilation groove 13d. The rib 13k is opposed to the end surface 16c on the longitudinal separation direction side of the duct assembly 16 in the longitudinal direction L. According to the above configuration, when the back cover 14 is removed, it becomes difficult to touch the end surface 16c of the duct assembly 16 on the longitudinally spaced direction side, so that the duct assembly 16 is peeled from the battery housing 13 with respect to the duct assembly 16. It is difficult to apply external force.

  Moreover, as shown in FIG. 7, in this embodiment, the sheet | seat 16a is FPC. The sheet 16a has a conductor 20 constituting an antenna. As shown in FIG. 7, electrical holes 21 are formed in the double-sided tape 16b. The conductor 20 of the sheet 16a is in electrical contact with the conductor 22 on the back surface 13b of the battery housing 13 through the electrical hole 21 of the double-sided tape 16b. Due to the presence of the double-sided tape 16b, waterproofness is ensured for electrical contact between the conductor 20 of the sheet 16a and the conductor 22 of the battery housing 13.

DESCRIPTION OF SYMBOLS 10 Smartphone 13 Battery housing 13b Battery housing back surface 13d Ventilation groove 15g Microphone 16a Sheet 18 Duct
T thickness direction

Claims (10)

A casing having a flat shape, and having a surface substantially orthogonal to the thickness direction of the casing and a groove extending on the surface in a direction substantially orthogonal to the thickness direction A housing,
By covering the groove, a sheet or film that forms a first air passage extending in a direction substantially perpendicular to the thickness direction, and
A conversion element that converts a sound wave propagating through the first air passage into an electrical signal;
With electronic equipment. The electronic device according to claim 1,
The first ventilation path communicates with the outside of the electronic device;
Electronics. The electronic device according to claim 2,
The first air passage is open in a direction substantially perpendicular to the thickness direction;
Electronics. The electronic device according to claim 3,
The housing has a battery housing recess capable of housing a battery,
The electronic device further includes a cover that covers the battery housed in the battery housing recess,
The cover covers the sheet or film;
Electronics. An electronic device according to any one of claims 1 to 4,
The housing has a second air passage between the first air passage and the conversion element so that the sound wave propagating through the first air passage can reach the conversion element.
Electronics. The electronic device according to claim 5,
The second air passage extends in a direction substantially orthogonal to the longitudinal direction of the first air passage.
Electronics. The electronic device according to claim 6,
The second air passage extends in the thickness direction.
Electronics. The electronic device according to claim 7,
The first air passage, the second air passage, and the conversion element are arranged in this order in the thickness direction.
Electronics. The electronic device according to claim 1,
The sheet or film has a conductor constituting an antenna,
Electronics. A casing having a flat shape, and having a surface substantially orthogonal to the thickness direction of the casing and a groove extending on the surface in a direction substantially orthogonal to the thickness direction A housing,
By covering the groove, a sheet or film that forms a first air passage extending in a direction substantially perpendicular to the thickness direction, and
A conversion element that converts a sound wave propagating through the first air passage into an electrical signal;
With
The housing has a second air passage between the first air passage and the conversion element so that the sound wave propagating through the first air passage can reach the conversion element.
An airtight inspection method for electronic equipment,
In turn,
(1) Before the groove is covered with the sheet or film, the second air passage is closed and an airtight inspection is performed,
(2) After the airtight inspection, the second air passage is unblocked and the groove is covered with the sheet or film.
Airtight inspection method for electronic equipment.

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