JP5873747B2 - Electronic device push button mounting structure - Google Patents

Description

  The present invention relates to a push button switch of an electronic device, and more particularly to a push button mounting structure of an electronic device in which an elastic piece for returning after a pressing operation is integrally formed and a switch element disposed on a back portion is operated.

2. Description of the Related Art Conventionally, a push button that can turn on / off a switch element arranged in a case without using an elastic member such as a coil spring has been widely used in electronic devices. In such a push button, for example, as disclosed in Patent Document 1, a shaft that rotates by being connected to a case is arranged at one end of a push operation unit of the push button, and the opposite of the push button facing the shaft is arranged. An elastic piece was provided on the side and assembled to the case. With this configuration, the stroke amount of the push button can be easily secured without requiring a space in the depth direction, and the push button itself can be constructed at low cost.
Moreover, when the operation surface to which the push button is pressed is large, there is a configuration in which an elastic piece is arranged on the back of the push button (see, for example, Patent Document 2).

JP 2011-249121 A JP 2005-228590 A

  While recent electronic devices are becoming smaller and thinner, display units and operation units such as liquid crystal displays assembled in cases are becoming larger. This trend is particularly noticeable in intercom equipment. In addition to thinning of the equipment case, the liquid crystal display has become larger, and the liquid crystal display is placed in the center of the case and the push button switch is placed around the case. It is spreading.

However, when installing a push button in which elastic pieces are integrally formed on the periphery of the case, even if the push button can be arranged at the end of the case in the structure as described in Patent Document 1, the elastic piece moves in the center direction of the case. Therefore, it is necessary to provide a case with a space around the display, and it is difficult to reduce the size of the case.
Further, in the case of the configuration of Patent Document 2 provided with an elastic piece on the back portion of the push button, the push button itself cannot be made small, which is not preferable.

  Therefore, in view of such problems, the present invention provides a push button mounting structure for an electronic device that can be installed in a space-saving manner at the edge of a case even if the elastic piece is a push button integrally formed. It is aimed.

In order to solve the above-mentioned problems, the invention of claim 1 is a push button mounting structure for an electronic device in which a pressing operation part is exposed on the front surface of a case and a switch element disposed in the case is turned on / off. The pressing operation portion includes a switch contact portion that contacts the switch element, and an elastic piece for returning the pressed operation portion is extended to the side of the pressing operation portion and further pressed to the case. While the button fixing part is provided at the tip of the elastic piece, the case is composed of an upper case that forms the front of the case and a lower case that forms the back of the case, and warps formed on the outer periphery of the upper case. An accommodation recess for accommodating the push button fixing portion is cut out on the inner side of the upper outer peripheral rib to prevent it , and the push button fixing portion is arranged in the accommodation recess so that the pressing operation can be performed with the push button fixing portion as a fulcrum. This The features.
According to this configuration, since the push button fixing portion is arranged by cutting out the outer peripheral rib of the upper case, even if the push button fixing portion is arranged on the case edge side from the pressing operation portion, the pressing operation portion itself is also located on the case edge. Can be placed close together. Since the elastic piece is also arranged outside the case from the pressing operation unit, the push button can be arranged in a space-saving manner, and the case can be downsized even if a large display or the like is arranged.

According to a second aspect of the present invention, in the configuration according to the first aspect, when the upper case and the lower case are fitted, the push button fixing portion abuts on a lower outer peripheral rib formed on the outer periphery of the lower case. It has a lower case contact portion, and when the upper case and the lower case are fitted, the push button fixing portion is sandwiched between the upper case and the lower case.
According to this configuration, since the push button fixing portion is sandwiched between the upper case and the lower case, rattling of the push button fixing portion is prevented, and the push button fixing portion functions as an upper outer peripheral rib. It is possible to ensure the rigidity of the case even if the housing recess is provided in the upper outer peripheral rib, and to prevent the case from being easily bent.

According to a third aspect of the present invention, in the configuration according to the first or second aspect, the switch element is mounted on the circuit board in the case, and the push button fixing portion is in contact with the switch element mounting surface of the circuit board. It has a rib.
According to this configuration, since the push button fixing portion is restrained by the circuit board and the upper case attached to the case, rattling of the push button fixing portion is prevented.

According to the present invention, the push button fixing portion is arranged by cutting out the outer peripheral rib structure of the upper case. Therefore, even if the push button fixing portion is arranged closer to the case edge than the pressing operation portion, the pressing operation portion itself is also the case edge Can be placed close to each other. And since an elastic piece is also arrange | positioned outside a pressing operation part, the big space of a case front surface can be utilized for installation of another member, and it is effective for size reduction of a case.
Further, by holding the push button fixing portion between the upper case and the lower case, it is possible to prevent the push button fixing portion from rattling, and it is possible to cause the push button fixing portion to function as an upper outer peripheral rib. In addition, even if the housing recess is provided in the upper outer peripheral rib, the rigidity of the case can be ensured and it can be prevented from being easily bent.

It is an external view of the intercom apparatus which employ | adopted the push button attachment structure of the electronic device which concerns on this invention. It is a front view of the intercom apparatus of FIG. 1 which removed the handset. It is a back perspective view of the upper case of FIG. It is a B section enlarged view. A push button is shown, (a) is a front view, (b) is a plan view, and (c) is a right side view. It is AA sectional view. It is a C section enlarged view. It is a D section enlarged view.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments embodying the present invention will be described below in detail with reference to the drawings. 1 and 2 show an interphone device which is an electronic device adopting a push button mounting structure according to the present invention, FIG. 1 is an external view, and FIG. 2 is a front view of a case with a handset removed. 1 and 2, 1 is a push button, 2 is a liquid crystal display for displaying images and various operation screens, 3 is a handset for talking, 4 is a speaker, 5 is a microphone, and the display 2 is the center of the case 6. The push button 1 is arranged in a small space below the push button 1.

  This intercom device indicates a device installed indoors, and the push button 1 is used as a menu button for displaying a menu screen on the display 2. The microphone 5 is provided for a hands-free call that does not use the handset 3, and the speaker 4 is provided as a sound reporting unit for reporting various alarm sounds in addition to the hands-free call.

  The case 6 includes an upper case 6a that forms the front surface and a lower case 6b that forms the back surface, and FIG. 3 shows a perspective view of the upper case 6a as viewed from the rear. As shown in FIG. 3, the upper case 6 a has a display installation part 11 using a large area, and a push button installation part 12, a microphone installation part 13, and a speaker on the side hidden by the handset 3 at the lower part. A portion 14 is provided.

  FIG. 4 is an enlarged view of a portion B in FIG. 3 and shows an enlarged view of the push button installation portion 12. FIG. 5 shows the push button 1 alone, (a) is a front view, (b) is a plan view, and (c) is a right side view. As shown in FIGS. 4 and 5, the push button 1 is a pressing operation portion 1 a that is pressed, a leaf spring portion 1 b that returns the pressing state of the pressing operation portion 1 a, and a fulcrum of the pressing operation that is fixed to the case 1. It is comprised with the push button fixing | fixed part 1c, and is integrally formed by synthetic resin molding.

The push-down operation unit 1a bulges out from a flat base portion 17 into a horizontally long oval shape, and the top portion forms an operation surface 18 having a uniform curved surface. The leaf spring portion 1b is also a member that connects the base portion 17 of the push-down operation portion 1a and the push button fixing portion 1c, and is provided in a plate shape so as to have elasticity in the front-rear direction while being provided in a pair on the left and right. . The push button fixing portion 1c is formed in a horizontally long bar shape, and is arranged in parallel with the push operation portion 1a.
A switch abutting portion 19 that abuts on a switch element to be described later is provided on the back surface of the pressing operation portion 1a.

  In the interphone device using the relatively small case 6 despite the large display 2 as in this embodiment, the space for arranging the push button 1 is limited, and the periphery of the case is inevitably It is necessary to attach it to a part of a slight width of the part. Therefore, the shape of the push button 1 is also formed in such a horizontally long shape, and a shape in which the push operation portion 1a and the push button fixing portion 1c are close to each other is required. Hereinafter, the mounting form of the push button 1 formed as described above will be described.

  6 is a cross-sectional view taken along the line AA in the center of the push button in FIG. 2. As shown in FIG. 6, ribs (upper outer periphery) are provided on the outer periphery of the upper case 6a and the lower case 6b. A rib 20 and a lower outer peripheral rib 21) are formed over the entire circumference. Then, as shown in FIG. 4, the push button installation portion 12 accommodates the push button fixing portion 1c in the housing recess 23 provided by cutting out the inner side of the upper outer peripheral rib 20 of the upper case 6a, and is arranged in the upper case 6a. Has been.

  In FIG. 4, a wall portion 15 provided in parallel with the upper outer peripheral rib 20 is a rib for countermeasures against static electricity. In FIG. 6, reference numeral 24 denotes a switch element that is turned on / off by pressing the push button 1, and 25 denotes a circuit board on which the switch element 24 is mounted. The circuit board 24 is assembled to the upper case 6a.

The push button fixing portion 1c accommodated in the accommodating recess 23 is disposed so as to form a part of the upper outer peripheral rib 20, and is clamped and fixed by fitting the lower case 6b to the upper case 6a. FIG. 7 is an enlarged view of a portion C in FIG. 6 and will be specifically described with reference to FIG.
The upper outer peripheral rib 20 is provided with a stepped portion 20a on the inner side with which the tip of the lower outer peripheral rib 21 of the lower case 6b to be fitted comes into contact. The push button fixing portion 1c has a depth T matched to the stepped portion 20a, and the back surface 22 of the push button fixing portion 1c attached to the receiving recess 23 has the same height as the stepped portion 20a.
Therefore, when the upper case 6a and the lower case 6b are fitted and the lower outer peripheral rib 21 comes into contact with the step portion 20a of the upper outer peripheral rib 20, the lower outer peripheral rib 21 is simultaneously applied to the push button fixing portion 1c. Abut. Thus, the push button fixing portion 1c is clamped and fixed between the outer peripheral ribs 20 and 21.

  FIG. 8 is a view for comparison, and shows an enlarged view of a portion D in FIG. FIG. 8 is a view for comparing the upper outer peripheral rib 20 shown in FIG. 7 formed thin by forming the receiving recess 23 with the upper outer peripheral rib 20 having a sufficient thickness other than that. The upper outer peripheral rib 20 that does not need to form 23 has a sufficient thickness to prevent warping, and fits well with the lower case 6b.

  In FIG. 7, reference numeral 26 denotes a board contact rib that contacts the circuit board 25. The board abutment rib 26 protrudes rearward from the upper part of the push button fixing part 1c on the pressing operation part 1a side, and when the circuit board 25 is attached to the upper case 6a to which the push button 1 is attached, Contact the substrate 25. As a result, the push button fixing portion 1c is sandwiched between the circuit board 25 and the upper case 6a.

In this way, the push button fixing portion 1c is arranged by cutting out the outer peripheral rib 20 of the upper case 6a. Therefore, even if the push button fixing portion 1c is arranged closer to the edge side of the case 6 than the push operation portion 1a, the push operation portion 1a. It can also be placed close to the edge of the case. Since the leaf spring portion 1b is also arranged outside the pressing operation portion 1a, the large space on the front surface of the case 6 can be used for installing other members. The case 6 can be reduced in size.
Further, since the push button fixing portion 1c is sandwiched between the upper case 6a and the lower case 6b, rattling of the push button fixing portion 1c is prevented, and the action of the upper outer peripheral rib 20 on the push button fixing portion 1c is prevented. Even if the housing recess 23 is provided in the upper outer peripheral rib 20, the rigidity of the upper case 6 a can be secured and it can be prevented from being easily bent.
Further, since the push button fixing portion 1c is restrained by the circuit board 25 and the upper case 6a arranged in the case 6, the push button 1 can be held firmly.

  In the above embodiment, a pair of leaf springs 1b are arranged on the left and right, but depending on the size of the pressing operation unit 1a, only one may be arranged in the center or three.

  In the above-described embodiment, the case where the push button mounting structure of the present invention is applied to an interphone device which is an electronic device has been described.

  1 ·· Push button, 1a ·· Pressing operation portion, 1b ·· Plate spring portion (elastic piece), 1c ·· Push button fixing portion, 19 ·· Switch contact portion, 20 ·· Upper outer peripheral rib, 21 ·· Lower outer peripheral rib, 22 ..Back (lower case contact portion), 23 ..Accommodating recess, 24 ..Switch element, 25 ..Circuit board, 26.

Claims (3)

A push button mounting structure for an electronic device that exposes a pressing operation part on the front surface of the case and performs an on / off operation of a switch element disposed in the case.
A switch contact portion that contacts the switch element is provided on the back surface of the pressing operation portion, and an elastic piece for returning the pressed operation portion is extended to the side of the pressing operation portion, and further to the case. While the push button fixing portion for locking is provided at the tip of the elastic piece,
The case is composed of an upper case constituting the front surface of the case and a lower case constituting the back surface of the case, and the inner side of the upper outer peripheral rib for preventing warpage formed on the outer periphery of the upper case. An accommodation recess for accommodating the button fixing portion is cut out to form the push button fixing portion in the accommodation recess,
A push button mounting structure for an electronic device, wherein the push button fixing portion can be used as a fulcrum to perform a pressing operation. The push button fixing portion has a lower case contact portion that contacts a lower outer peripheral rib formed on an outer periphery of the lower case when the upper case and the lower case are fitted together.
2. The push button mounting structure for an electronic device according to claim 1, wherein when the upper case and the lower case are fitted together, the push button fixing portion is sandwiched between the upper case and the lower case. . The switch element is mounted on a circuit board in the case,
3. The push button mounting structure for an electronic device according to claim 1, wherein the push button fixing portion has a board contact rib that contacts the switch element mounting surface of the circuit board.

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