JP2935233B2 - Portable electronic devices - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display
Carrying a circuit board on which electronic components such as
The present invention relates to a belt-type electronic device .

[0002]

2. Description of the Related Art In a paging system, for example, when a person who wants to call calls a calling number of a portable radio receiver (pager) of a specific person, the radio receiver corresponding to the calling number calls himself. Is notified by a speaker or the like, and the called person can contact the calling person by calling a predetermined place. FIG. 3 shows an example of a conventional portable wireless receiver used in such a paging system.

[0003] This radio receiver has a flat, flat, box-shaped device case comprising an upper device case 1 and a lower device case 2 slidably mounted on the upper device case 1. A radio unit block 3 and a processing unit block 4 are provided inside the upper device case 1. The radio section block 3 includes a circuit board 11. On the circuit board 11, a loop antenna 12 for receiving a radio signal, and a radio unit 13 including a plurality of electronic components for demodulating a radio signal received by the loop antenna 12 into a digital signal are mounted. I have. The loop antenna 12 includes a substantially U-shaped antenna half 12a attached to the upper surface of the circuit board 11 by soldering, and a substantially U-shaped antenna half 12b similarly attached to the lower surface of the circuit board 11 by soldering. (See FIG. 2).

The processing block 4 has a circuit board 21. The circuit board 21 is electrically connected to the circuit board 11 of the wireless unit block 3 via an electrical connection member (not shown), and receives a digital signal demodulated by the wireless unit 13 via the electrical connection member. In addition, a control signal is output to the radio unit 13. Also, the circuit board 21
An LSI 22 and an ID-ROM (not shown) are mounted on the lower surface of the device. The LSI 22 incorporates circuits for controlling the circuit, such as a CPU, a decoder unit, a message memory unit (RAM), and a switch input unit. The decoder unit determines whether or not the signal code of the digital signal input from the wireless unit 13 matches its own calling number stored in the ID-ROM. The signal and the message information received following the matching detected calling number are supplied to the CPU. The message memory unit is for temporarily storing message information supplied to the CPU. The switch input unit detects the state of various switches described later and inputs a state signal and an operation signal.

A holder 33 holding a liquid crystal display panel 31 and a light diffusion / reflection plate 32 is provided on the upper surface of the circuit board 21 of the processing section block 4 by being pressed by a panel holding plate 34 attached to the circuit board 21. Have been. The liquid crystal display panel 31 is for displaying the received message information, and is electrically connected to the circuit board 21 via the interconnector 35. The display surface of the liquid crystal display panel 31 is visible through a display window 36 of a panel holding plate 34 and a transparent plate 37. The transparent plate 37 is attached to the upper device case 1 via a double-sided adhesive tape 38.

Although not shown, the circuit board 21 of the processing section block 4 has a speaker for notifying a call by sound, a light emitting diode for notifying the call by light, and a power on / off switch. There are provided a power switch for switching off, a read switch used for displaying the message information temporarily stored in the message memory unit in the LSI 22 on the liquid crystal display panel 31, and the like. Although not shown, the upper device case 1 is provided with a battery storage portion for storing a battery, and is closed by a detachable battery cover.
As described above, in this wireless receiver, all of the radio unit block 3 and the processing unit block 4 and the like are arranged in a flat rectangular box-shaped device case including the upper device case 1 and the lower device case 2. Electronic components are mounted and can be carried in a breast pocket or the like.

[0007]

However, in such a conventional radio receiver, an upper device case 1 is attached to a lower device case 2.
Are slidably mounted and the battery cover is detachably mounted, so that dirt and dust easily enter through the gaps between the upper device case 1, the lower device case 2 and the battery cover. It is remarkable when used in a place where the environment is poor as described above, and if the infiltrated dust and dirt adhere to the display surface of the liquid crystal display panel 31 or the inner surface of the transparent plate 37, the display surface of the liquid crystal display panel 31 becomes difficult to see. There was a problem that would. It should be noted that other portable electronic devices, such as calculators, having a display unit such as a liquid crystal display panel have the same problem.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a display portion of a display unit even if dirt or dust intrudes from a gap in an equipment case. Can prevent intrusion of dust and dirt
It is to provide a portable electronic device .

[0009]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention comprises at least two case members for housing a circuit board on which electronic components such as a display panel are mounted. A portable electronic device in which a transparent plate is provided at a position facing the display panel of a case member covering a display panel mounting surface side of the circuit board, wherein the inner surface of the transparent plate or the transparent plate is provided; between the inner surface of the member and the display panel, and the main point in that a resilient frame body for preventing the intrusion of such dirt and dust to during this time gap.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to embodiments. 1 and 2 show a main part of a wireless receiver to which the present invention is applied. In these drawings, the same reference numerals are given to the same components as those in FIG. 4, and the description thereof will be omitted as appropriate.

In this radio receiver, one circuit board 41
The circuit board of the radio unit block 3 and the processing unit block 4 is also used. A linear or L-shaped mounting groove 42 is formed at a predetermined position of the circuit board 41 corresponding to the center of the loop antenna 12 of the radio unit block 3. An antenna protection and case reinforcing member 43 is provided in the mounting groove 42. The antenna protection and case reinforcing member 43 is provided with protrusions 43b and 43c having a two-stage structure above and below the mounting portion 43a, and these protrusions 43b and 43c are provided.
The antenna facing surfaces 43 d and 43
e is formed, and the case facing surface 43 is formed by the higher step.
f, 43 g are formed.

The antenna protection and case reinforcing member 4
3 is each antenna half 12a of the loop antenna 12, 1
Before the 2b is mounted on the circuit board 41 by soldering, the mounting portion 43a is inserted into the mounting groove 42 and mounted on the circuit board 41 by press-fitting, welding or screwing. In a state where the antenna protection and case reinforcing member 43 and the loop antenna 12 are attached to the circuit board 41, the antenna facing surfaces 43d and 43e respectively face the opposing inner surfaces of the two antenna halves 12a and 12b of the loop antenna 12. Together with the case facing surface 43
f and 43g face the opposing inner surfaces of the upper device case 1 and the lower device case 2, respectively.

A switch board 51 is vertically mounted on the end face of the circuit board 41 in the processing section block 4 by solder 52. Button windows 53 are formed in a plurality of predetermined places of the upper device case 1 facing the switch board 51. A push button 54 is arranged in the button window 53. The push button 54, the switch board 51, and the like constitute a push switch such as the readout switch described above. The speaker 55 and the slide-type power switch 56 described above are also attached to the circuit board 41 in the processing unit block 4.

An upper surface around a display window 36 of a panel pressing plate 34 for pressing and attaching the liquid crystal display panel 31 and the like to the circuit board 41 in the processing section block 4 is provided.
An elastic frame 61 made of sponge or the like is attached. The upper surface of the elastic frame 61 is pressed against the inner surface of the transparent plate 37 attached to the upper device case 1 by welding. The elastic frame 61 is connected to the display window 36 of the panel holding plate 34.
And the transparent plate 37 is sealed to prevent intrusion of dirt, dust, and the like into the gap, thereby preventing the display surface of the liquid crystal display panel 31 from being difficult to see, and preventing the device case from falling. The liquid crystal display panel 31 is intended to prevent the liquid crystal display panel 31 from being damaged by absorbing the shock caused by the shock.

In the radio receiver configured as described above, the antenna-facing surfaces 43d and 43e of the antenna protection and case reinforcing member 43 face the inner surfaces of the loop antenna 12 that face each other. The antenna protection and case reinforcing member 43 can prevent the loop antenna 12 from being unnecessarily deformed even if it is subjected to a shock due to a fall or the like. Also, the case facing surfaces 43f and 43g of the antenna protection and case reinforcing member 43 are the upper device case 1
And the inner surface of the lower device case 2 which opposes each other, so that the pressing strength in the thickness direction of the device case can be increased, and also a component for protecting the loop antenna, not a component dedicated to case reinforcement. Therefore, the number of parts can be reduced.

[0016]

As described above, according to the present invention, an equipment case for housing a circuit board on which electronic components such as a display panel are mounted is constituted by at least two case members. In a portable electronic device provided with a transparent plate at a position facing the display panel of a case member covering the display panel mounting surface side of the circuit board,
Between the inner surface and the display panel of the case member inner surface or the transparent plate of the transparent plate is provided, during which the air gap
Since an elastic frame is provided to prevent intrusion of dust and dirt into the device case, even if dirt or dust or the like intrudes from a gap between the device cases, for example, a gap between case members constituting the device case, It is possible to prevent intrusion of dust and the like into the gap, and even if an impact due to dropping of the device case or the like is received, the impact is absorbed by the elastic frame, thereby preventing the display panel from being damaged. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing an embodiment of a wireless receiver to which the present invention is applied.

FIG. 2 is a perspective view of a part of the wireless receiver.

FIG. 3 is a partial cross-sectional view illustrating an example of a conventional wireless receiver.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 upper device case 2 lower device case 31 liquid crystal display panel 34 panel holding plate 37 transparent plate 61 elastic frame

Claims (3)

(57) [Claims] An apparatus case for housing a circuit board on which electronic components such as a display panel are mounted is composed of at least two case members, and a case that covers a display panel mounting surface side of the circuit board among the case members. in the transparent plate on the display panel facing position is provided a portable electronic device members, between the inner surface and the display panel of the case member inner surface or the transparent plate of the transparent plate is provided, during which Void
A portable electronic device provided with an elastic frame for preventing intrusion of dust and the like into a portable electronic device. 2. A portable electronic device comprising a circuit board in which an electronic component such as a display panel is mounted in a device case, wherein the device case covers at least a display panel mounting surface side of the circuit board, and A first case member provided with a transparent plate at a position facing the display panel, and a second case member covering a surface of the circuit board on which the display panel is not mounted; the inner surface and the display panel of the first case member of the inner surface or the transparent plate near
Proof between the intrusion, such as dirt and dust to during this time gap between
A portable electronic device provided with an elastic frame for stopping . 3. The portable electronic device according to claim 1, wherein the elastic frame is a frame formed of a sponge.