JP2014064074A - Push button unit and electronic apparatus using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a push button unit which can ensure fixing and holding of a button sufficiently, while facilitating attachment of a button.SOLUTION: A push button unit 40 where a switch member placed in a housing is depressed when pushing an exposed part 44 arranged to be exposed to the outside from a through hole 240 formed in the housing of an electronic apparatus is molded integrally by a flange 42 provided on the rear side of the exposed part 44 and projecting farther radially outward than the through hole 240 in the housing, and a pair of elastic pieces 43 provided laterally from the flange 42 and deform elastically when the exposed part 44 is fixed by an engaging member 242 formed in the housing, and pushed.

Description

  The present invention relates to a push button unit mounting structure, and more particularly, to a push button unit that can be easily attached to a button and that can sufficiently secure and hold the button, and an electronic apparatus using the push button unit. .

  Generally, an electronic device is provided with a push button for operating the electronic device. The push button is arranged so that a part of the push button is exposed to the outside through a through hole formed in the casing of the electronic device. When the exposed portion of the push button is pressed, the switch in which the portion disposed inside the housing is disposed on the substrate is pressed.

  For example, in the following Patent Document 1 (Japanese Patent Application Laid-Open No. 2010-098674), the side key button is provided with a base portion projecting on both sides on the side opposite to the key top portion. A rib that restricts the pressing of the key button is formed, and the rib is side key button even after the rib and the base come into contact with each other by bending the part that comes into contact with the base when the side key button is pressed. Discloses a “side key button mounting structure and a portable terminal equipped with the same”.

JP 2010-098674 A

  However, in the mounting structure disclosed in Patent Document 1, the rib formed on the housing for restricting the pressing of the key button is configured such that the portion that comes into contact with the base is bent when the key button is pressed. Therefore, if the key button is pushed in strongly, the base part may come off from the rib, and the key button may go deeply into the opening and the switch may be kept pressed.

  In the mounting structure disclosed in Patent Document 1, it is necessary to provide a key button stroke that is a distance until the key button interferes with the rib in order to push the key button. There is also a problem that it is difficult to position the button when mounting the device on the housing, and it takes time and labor to assemble.

  Accordingly, an object of the present invention is to provide a push button unit that can be easily attached to a button and can sufficiently secure and hold the button.

  In the push button unit according to the present invention, the exposed member arranged to be exposed to the outside through the through hole formed in the housing of the electronic device is pushed, so that the switch member arranged inside the housing is pushed. It is a push button unit, provided on the back side of the exposed portion, a flange portion protruding in the outer diameter direction larger than the through hole of the housing, and provided from the flange portion toward the side, The edge is fixed by a locking member formed on the casing, and is integrally formed with a pair of elastic pieces that are elastically deformed when the exposed portion is pressed.

Furthermore, in one aspect of the push button unit of the present invention, the elastic piece has a U shape, and a concave portion that is engaged with a stopper protrusion provided on the casing as a locking member at the tip thereof. The leg part which has is provided, It is characterized by the above-mentioned.

  In one aspect of the push button unit of the present invention, the elastic piece is substantially flush with the flange portion so that the end edge is fitted by a locking member formed on the inner wall of the housing. It is provided so that it may be made.

  The electronic device of the present invention is an electronic device using the above push button unit, and the push button unit is configured such that the exposed portion is fitted into the through hole from the inner wall side of the housing. And the pair of elastic pieces are fixed by the locking member.

  According to the push button unit of the present invention, the following excellent effects are exhibited. That is, a flange portion that is provided on the back surface side of the exposed portion that is disposed so as to be exposed to the outside from the through hole formed in the housing of the electronic device, and that protrudes larger in the outer diameter direction than the through hole of the housing. And a pair of flanges that are laterally provided and elastically deformed in response to pressing of the exposed portion by being fixed by locking members formed on the casing. And an elastic piece. Accordingly, the spring property of the pair of elastic pieces is used to facilitate the attachment with the locking member formed on the housing, and the end edges of the pair of elastic pieces are fixed by the locking member. Even if the unit is pushed in strongly, the push button unit can be fixed to the casing of the electronic device with a simple configuration without being detached from the casing.

  Furthermore, according to one aspect of the push button unit of the present invention, the elastic piece has a U-shape, and is engaged with a stopper protrusion provided as a locking member on the housing at the tip thereof. A leg having a recess is provided. According to the present invention, the spring property of the pair of elastic pieces is used to facilitate attachment to the locking member formed on the housing, and to the stopper protrusion and the leg provided as the locking member. Positioning can be performed by using the provided concave portion for positioning.

  Further, according to one aspect of the push button unit of the present invention, the elastic piece is substantially flush with the flange portion so that the end edge is fitted by a locking member formed on the inner wall of the housing. It is provided to make. According to the present invention, the spring property of the pair of elastic pieces is used to facilitate the fitting with the locking member formed on the casing, and the edges of the pair of elastic pieces are fixed by the locking member. Therefore, even if the push button unit is pushed in strongly, it can be prevented from coming off from the housing.

  Further, according to the electronic device of the present invention, the above-described push button unit is incorporated into the electronic device so that the exposed portion is fitted into the through hole from the inner wall side of the housing, The elastic piece is fixed by the locking member. With such a structure, the spring property of the pair of elastic pieces is used to facilitate the attachment of the push button unit to the through-hole formed in the housing, and the push button unit can be detached from the housing even if it is pushed firmly. It becomes possible to fix the push button unit to the casing of the electronic device.

It is the external appearance perspective view which looked at the information display terminal device of the Example from diagonally forward. It is the external appearance perspective view seen from diagonally back in the state which removed the stand from the information display terminal device of FIG. It is a disassembled perspective view which shows the state which decomposed | disassembled the information display terminal device of FIG. It is the enlarged view which extracted the part of the power switch of Example 1 in the front housing. It is a disassembled perspective view which shows the state which decomposed | disassembled the part of the power switch of Example 1. FIG. FIG. 6 is an enlarged view of the power switch of the second embodiment extracted from the front housing of the second embodiment. It is a disassembled perspective view which shows the state which decomposed | disassembled the part of the power switch of Example 2. FIG.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS The best mode for carrying out the present invention will be described in detail below with reference to the drawings together with embodiments. However, the embodiment shown below illustrates an information display terminal device as an example of a push button unit for embodying the technical idea of the present invention and an electronic device using the push button unit. The present invention is not intended to be specified as an information display terminal device, and can be equally applied to other push button units and electronic devices using the same without departing from the technical idea shown in the claims.

  The information display terminal device of the present embodiment will be described with reference to FIGS. FIG. 1 is an external perspective view of the information display terminal device of the embodiment as viewed obliquely from the front, and FIG. 2 is an external perspective view of the information display terminal device from FIG. 3 is an exploded perspective view showing a state in which the information display terminal device of FIG. 2 is disassembled, and FIG. 4 is an enlarged view of a portion of the power switch of Example 1 extracted from the front housing. FIG. 5 is an exploded perspective view showing a state where the power switch portion of Example 1 is disassembled.

  As shown in FIG. 1, the information display terminal device 10 according to the present embodiment includes a flat and rectangular housing 20 and a stand 30 that is detachably provided on the bottom bottom of the housing 20. A display panel 21 is disposed on the front housing 201 of the housing 20. Further, the stand 30 tilts the information display terminal device 10 at a predetermined angle so that the display panel 21 is easy to see when the information display terminal device 10 is placed on a table and used stably. It is provided so that the apparatus 10 can be supported. Further, on the bottom side of the stand 30, protrusions 31 are arranged near the ends.

  As shown in FIG. 2, the information display terminal device 10 is provided with a power switch 22 and an input / output port 23 on the side surface of the housing 20. When pressed, the power switch 22 turns on or off the main power switch to control power supply from an external power source or an internal power source. The input / output port 23 includes a USB port 231, an audio output jack 232, and an SD card slot 233.

  The USB port 231 is provided for connection to an external device (not shown) via a USB cable (not shown). The audio output jack 232 is configured to be connected to headphones (not shown), and the SD card slot 233 is configured to be connectable by inserting an SD card (not shown) as an external recording medium. The information display terminal device 10 can read the moving image information stored in the SD card by inserting the SD card and display the moving image on the display panel 21.

  The housing 20 of the information display terminal device 10 is provided with a power connector 24, and a charging plug (not shown) connected to an AC power source is inserted therein. The information display terminal device 10 has a built-in charging circuit for charging a battery in a battery pack (not shown) by converting a voltage supplied from an AC power source into a DC voltage.

As shown in FIG. 3, the housing 20 includes a front housing 201, a rear housing 202, and a holder 203 installed inside these housings. The holder 203 includes a liquid crystal unit (not shown), a control circuit board for controlling the operation of the information display terminal device 10, a switch member for controlling the power switch 22, and a switch control board. The liquid crystal unit, the control circuit board, and the switch control board are connected to each other by wiring composed of a flexible printed board (not shown).

  The front housing 201 is integrated with a rectangular display panel opening 234 that faces the display panel 21 constituting the liquid crystal unit, a plurality of bosses 235 for fixing the holder 203 fitted in the internal space, and the rear housing 202. A plurality of connecting projections 236 are formed for the purpose.

  The holder 203 has a screw hole 237 formed at a position corresponding to the boss 235, and the connecting protrusion 236 is engaged with the rear housing 202 at a position corresponding to the connecting protrusion 236 so as to be integrated with the front housing 201. An engagement groove (not shown) is formed.

  In addition, the holder 203 is formed with a substrate placement portion 238 on which the control circuit substrate is placed and a substrate placement portion 239 on which the switch control substrate is placed. Further, a support portion (not shown) is provided on the back side of the holder 203, and a liquid crystal unit is attached.

  As shown in FIGS. 4 and 5, the power switch 22 includes a push button unit 40 installed inside the front housing 201. In FIG. 5, the push button unit 40 includes a flat plate-like leg portion 41 having a flange portion 42 that protrudes larger in the outer diameter direction than the through hole 240 provided in the front housing 201, and toward the side from the flange portion 42. A pair of elastic pieces 43 are formed, a key button 44 exposed from the front housing 201 is provided on the standing leg portion 41, and a substantially cross-shaped boss 45 is provided on the back surface thereof.

  The pair of elastic pieces 43 have an inverted U shape, and both ends thereof are provided with leg portions 46 having recesses that are engaged with stopper protrusions 242 provided on the back surface of the front housing 201. The push button unit 40 can be self-supporting by both legs 46. The standing leg portion 41, the flange portion 42, the elastic piece 43, the key button 44, the boss 45, and the leg portion 46 are integrally formed using a synthetic resin such as acrylonitrile butadiene styrene (ABS) resin.

  On the other hand, the front housing 201 is provided with a through-hole 240 into which the key button 44 is inserted, and a mounting recess 241 for arranging the push button unit 40 is provided. Is provided with a stopper projection 242 for receiving the push button unit 40.

  In FIG. 4, when the key button 44 of the push button unit 40 is pressed, the boss 45 provided on the back surface of the key button 44 by the elastic piece 43 of the push button unit 40 is provided on the holder 203 installed inside the housing. A switch operation is performed by pressing a switch member (not shown). At this time, since the push button unit 40 is completely placed in the placement recess 241 of the front housing 201, the stopper projection 242 does not function with respect to the pressing of the key button 44, thereby causing no displacement. In addition, sufficient elasticity can be obtained by the elastic piece 43.

As described above, in this embodiment, the push button unit 40 is arranged such that the key button 44 is disposed so as to be exposed to the outside through the through hole 240 formed in the front housing 201 that is the casing of the information display terminal device 10. The flange portion 42 provided on the rear surface side of the flange portion 42 is larger than the through-hole 240 and protrudes in the outer diameter direction, and the leg portion 46 is provided at the edge of the flange portion 42. It is integrally formed by a pair of inverted U-shaped elastic pieces 43 that are elastically deformed when the key button 44 is pressed by being fixed by the stopper protrusion 242 formed in the above.

  By doing so, the spring property of the pair of elastic pieces is utilized to facilitate the attachment with the stopper projection 242 formed on the front housing 201, and the leg portions 46 at the edges of the pair of elastic pieces are provided. Since it is fixed by the stopper projection 242, it is possible to fix the push button unit 40 to the front housing 201 with a simple configuration without detaching from the front housing 201 even if the push button unit 40 is pushed in strongly.

  A power switch according to the second embodiment will be described with reference to FIGS. 6 is an enlarged view in which the power switch portion of the second embodiment is extracted from the front housing of the second embodiment, and FIG. 7 is an exploded perspective view showing a state in which the power switch portion of the second embodiment is disassembled. is there.

  As shown in FIGS. 6 and 7, the power switch 22 ′ includes a push button unit 50 installed inside the front housing 201 ′. In FIG. 7, the push button unit 50 includes a pair of a flat plate portion 51 having a flange portion 52 that protrudes larger in the outer diameter direction than a through hole 240 ′ provided in the front housing 201 ′, and a pair of flange portions 52 toward the side. The elastic plate 53 is formed, a key button 54 (not shown) exposed from the front housing 201 ′ is provided on the flat plate portion 51, and a substantially I-shaped boss 55 is provided on the back surface thereof. .

  The pair of elastic pieces 53 has a substantially annular shape, and both ends of the elastic pieces 53 are engaged with a fixed portion 241 ′ provided on the inner wall of the front housing 201 ′ and a locking portion that comes into contact with an end portion of the fixed piece 241 ′. 57 is provided. Further, the flat plate portion 51, the flange portion 52, the elastic piece 53, the key button 54, the boss 55, the convex portion 56, and the locking portion 57 are integrally formed using a synthetic resin such as acrylonitrile butadiene styrene (ABS) resin. .

  On the other hand, the front housing 201 ′ is provided with a through hole 240 ′ into which the key button 54 is inserted, and a fixing piece 241 ′ for arranging the push button unit 40 is provided. 'Is provided so as to form a groove space into which the convex portion 56 can be inserted in order to fix the push button unit 40 between the inner wall of the front housing 201'.

  In FIG. 6, when the key button 54 of the push button unit 50 is pressed, the boss 55 provided on the back surface of the key button 54 by the elastic piece 53 of the push button unit 50 is provided on the holder 203 installed inside the housing. A switch operation is performed by pressing a switch member (not shown). At this time, since the push button unit 50 is fixed by the fixing piece 241 ′ of the front housing 201 ′, the convex portion 56 and the locking portion 57 function to be displaced due to the pressing of the key button 54. In addition, the elastic piece 43 can bring out a sufficient spring property.

  As described above, in this embodiment, the push button unit 50 is a key arranged so as to be exposed to the outside through the through hole 240 ′ formed in the front housing 201 ′ that is the housing of the information display terminal device 10. A flange portion 52 provided on the back surface side of the button 54 and projecting in the outer diameter direction larger than the through hole 240 ′, and a convex portion 56 provided at the edge of the flange portion 52, which is provided laterally from the flange portion 52. It is integrally formed with a pair of substantially annular elastic pieces 53 that are elastically deformed when the key button 54 is pressed by being fixed by a screw fixing piece 241 ′ formed on the front housing 201.

By doing so, the spring property of the pair of elastic pieces is used to facilitate attachment to the fixed piece 241 ′ formed on the front housing 201 ′, and the convex portions 56 at the edges of the pair of elastic pieces are provided. Since it is fixed by the fixing piece 241 ′, it is possible to fix the push button unit 50 to the front housing 201 ′ with a simple configuration without detaching from the front housing 201 ′ even if the push button unit 50 is pushed in strongly.

  In the above embodiment, the case where the push button unit is applied to the information display terminal device has been described. However, the present invention is not limited to this, and can be applied to other electronic devices.

DESCRIPTION OF SYMBOLS 10 Information display terminal device 20 Case 21 Display panel 22, 22 'Power switch 23 Input / output port 24 Power connector 201, 201' Front housing 202 Rear housing 203 Holder 231 USB port 232 Audio output jack 233 SD card slot 234 For display panel Opening 235 Boss 236 Connecting projection 237 Screw hole 238, 239 Substrate placement portion 240, 240 ′ Through hole 241, placement recess 241 ′ Fixing piece 242 Stopper projection 30 Stand 31 Protrusion 40, 50 Push button unit 41 Standing leg portion 42 , 52 Flange part 43, 53 Elastic piece 44, 54 Key button 45, 55 Boss 46 Leg part 51 Flat part 56 Convex part 57 Locking part

Claims (4)

In a push button unit in which a switch member disposed inside the housing is pressed by pressing an exposed portion arranged to be exposed to the outside through a through hole formed in the housing of the electronic device.
A flange portion provided on the back surface side of the exposed portion and projecting in a larger outer diameter direction than the through hole of the housing;
A pair of elastic pieces provided toward the side from the flange portion and elastically deforming in response to the exposed portion being pushed by fixing the edge of the flange portion by a locking member formed on the housing. When,
A push button unit characterized by being integrally molded by.   The elastic piece has a U-shape, and a leg portion having a concave portion to be engaged with a stopper protruding portion provided as an engaging member on the casing is provided at a tip of the elastic piece. The push button unit according to claim 1.   The elastic piece is provided so as to be substantially flush with the flange portion so that the end edge is fitted by a locking member formed on an inner wall of the housing. The push button unit according to 1.   The push button unit is incorporated in the electronic device so that the exposed portion is fitted into the through hole from the inner wall side of the housing, and the pair of elastic pieces is fixed by the locking member. An electronic device using the push button unit according to any one of claims 1 to 3.

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