JPH0917592A - Static electricity infiltration preventing structure for electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure which can protect static electricity, by collectively covering an electronic part of various kinds with a single insulating member constituted by a rubber cover or the like, in a static electricity infiltration preventing structure for an electronic equipment such as a pager or the like. SOLUTION: In a static electricity infiltration preventing structure for an electronic equipment 1 formed by receiving various kinds of electronic parts 18, 19, 20, 21, 22, 23, 24 in a case main unit 2, an insulating member (rubber cover) 70 is arranged so as to collectively warp many of the electronic parts 18, 19, 20, 21, 22, 23, 24. Loop antennas 20, 21 and switch parts (tact switch) 18, 19 on a substrate 14 are included in the electronic parts collectively wrapped by this insulating member 70. At least partly the loop antennas 20, 21 are coated with the insulating member 70, and to coat partly the switch parts 18, 19. Further the insulating member 70 is interposed between an operating hole of the case main unit and the switch parts 18, 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for preventing static electricity intrusion in electronic equipment such as pagers.

[0002]

2. Description of the Related Art In an electronic device such as a pager, static electricity enters inside through a gap such as a mating portion of a case body. Sheets for preventing static electricity from invading from the inside were locally attached to necessary places such as and operation keys.
In addition, when equipped with a switch component consisting of a tact switch on the board and an operation key consisting of a switch knob for operating this from the outside, in order to prevent rattling of the switch knob, shock absorption and push-out prevention. The structure was used to keep the switch knob pushed up using rubber.

[0003]

As described above, the conventional countermeasures against static electricity intrusion are performed by individually attaching the sheets to the necessary portions as the insulating member, so that the number of parts is increased and the assembly is improved. It had a bad influence on work efficiency and cost. Further, since rubber is required to hold the switch knob in a pushed-up state, there is a problem in that the number of parts and the number of assembling steps also increase in this respect.

An object of the present invention is to integrate various electronic parts such as an antenna and a switch part with a single insulating member composed of a rubber cover in the structure for preventing electrostatic intrusion of electronic equipment such as a pager as described above. To provide a structure that can be covered and protected from static electricity.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 is a static electricity intrusion preventing structure for an electronic device, wherein various electronic parts are housed in a case body. It is characterized by a configuration in which an insulating member is arranged so as to wrap most of the parts together.

As described above, since the structure for preventing the intrusion of static electricity of electronic equipment is such that many of the electronic components are collectively wrapped by the insulating member, it is possible to protect many electronic components from static electricity by a single insulating member. become. Further, since a single insulating member that wraps many electronic components together is used, the number of components of the insulating member can be minimized, and the efficiency of assembly work can be improved.

The invention according to claim 2 is the same as claim 1
A static electricity intrusion prevention structure for an electronic device as described above, wherein the electronic component includes a loop antenna, and the loop antenna is arranged so as to be at least partially covered by the insulating member. I am trying.

As described above, at least a part of the loop antenna is covered with the insulating member, so that static electricity can be effectively prevented from entering the loop antenna with the single insulating member.

Further, the invention according to claim 3 is the invention according to claim 1.
Or the structure for preventing static electricity intrusion of the electronic device according to 2, wherein the electronic component includes a switch component such as a tact switch on a substrate, and the switch component (tact switch or the like) is covered by the insulating member. It is characterized by a configuration that is arranged so that it can be seen.

Since the switch component is covered with the insulating member in this manner, static electricity can be effectively prevented from entering the switch component with the single insulating member.

According to a fourth aspect of the present invention, there is provided a structure for preventing static electricity intrusion of an electronic device according to the third aspect, wherein the electronic device directly operates the switch component (tact switch or the like) from the outside. The present invention is characterized in that an operation key is provided, the insulating member is made of an elastic member such as a rubber cover, and is arranged so as to be interposed between the switch component (tact switch or the like) and the operation key. .

As described above, since the elastic insulating member such as the rubber cover is arranged so as to be interposed between the operation key and the switch component, in addition to the function of preventing static electricity intrusion,
It is possible to prevent rattling and push-out of the key operation portion such as a switch knob corresponding to the switch component, and shock impact on the switch component.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an electrostatic intrusion preventing structure for electronic equipment according to the present invention will be described below with reference to FIGS.
It will be described based on.

<First Embodiment> First, FIG. 1 shows a pager as a first embodiment of an electronic apparatus to which the present invention is applied, and FIG. The front view seen, FIG. 1B is a plan view seen from the upper side where the operation keys are provided, and FIG. 1C is a side view seen from the one side where the chain hook 10 is provided, and FIGS. FIG. 2 is an enlarged cross-sectional view showing an internal configuration along the line AA and the line BB in FIG. 1B.

1 to 3, 1 is a pager (electronic device), 2 is a case body, 3 is an upper case,
4 is a lower case, 5 is a display glass, 6 is an LCD display part, 7
Is an LED display part, 8 is a memory key (operation key), 9 is a set key (operation key), 10 is a chain hook, 11
Is a battery, 12 is a battery lid, 13 is a lock knob, 14 is a main substrate, 15 is an LCD holder, 16 is an LCD, 17
Is a diffuse reflector, 18 and 19 are tact switches (switch parts), 20 and 21 are loop antennas, 22 is an LSI,
23 and 24 are electronic components, and 70 is an insulating member.

In the first embodiment, in the pager 1 which is an electronic device, a case body 2 is composed of an upper case 3 and a lower case 4, and as shown in the figure, the front side of the upper case 3 of the case body 2 is front side. The end surface is an inclined surface,
A display glass 5 is fitted on the inclined surface of the front end surface. This display glass 5 has an LCD (Liquid
(Crystal Display: Liquid crystal display)
The display unit 6 and the LEDs (Light Emi) on one side of the display unit 6
A toning diode (light emitting diode) display unit 7 is provided.

On the upper surface of the upper case 3, there is a key operation part facing the operation hole, that is, a memory key 8 and a set key 9.
The upper case 3 and the lower case 4 are provided with operation keys, and the chain hook 1
0 is provided. A battery 11 is housed in a portion along the rear portion of the lower case 4, and a battery lid 12 is assembled slidably in the depth direction of FIG. The battery lid 12 is attachable to and detachable from the lower case 4, and further includes a lock knob 13 fixed to the lower case 4 so as to be slidable in the lateral direction of FIG.

Then, the main board 14 in the case body 2
An LCD holder 15 is fixed to one side of the long side of the LCD, and an LCD 16 and a diffuse reflection plate 17 therebelow are housed in the LCD holder 15. The LCD 16 is connected to the main board 14 by a heat seal 16a. Further, the memory key 8 is provided on the main board 14.
And tact switches 18 and 19 which are switch components corresponding to the set key 9 are mounted, and
Two loop antennas 20 and 21 by a double loop, that is, the outer loop antenna 20 and the inner loop antenna 21 are fixed to one side portion on the short side. Further, on the main board 14, an LSI (Large S
call Integration: large-scale integrated circuit)
22 and other electronic components 23 and 24 are mounted.
Such a main board 14 and tact switches 18, 1
A three-dimensional rubber cover 70 is provided as an insulating member for preventing static electricity intrusion that collectively covers many internal components such as 9, the loop antennas 20 and 21, the LSI 22, and other electronic components 23 and 24. The rubber cover 70 will be described in detail later.

Next, the internal parts before the rubber cover 70 is attached will be described with reference to FIGS. 4 to 6. LCD
As shown in FIG. 4B, the holder 15 is fixed to the main board 14 by screws 25, and the LCD 16 in the LCD holder 15 has a frame-shaped sponge 26 that serves as a shock absorber and a dust intruder. It is pressed against and fixed to the case main body 2 via. Also, FIG. 4 (a) and FIG.
As shown in (a), the LED 27, which is the light source of the backlight for the LCD 16, is soldered to the sub-board 28. The sub-board 28 is designed to mount components simultaneously with the main board 14.

Further, the sub-board 28 is connected to the main board 14 by the lead wire 29, and is also sandwiched and fixed by the sandwiching ribs 30 and 31 formed at one end of the LCD holder 15. Further, the LCD holder 15 is integrally formed with a vibrator holding portion 32 fixed on the main substrate 14, and the vibrator holding portion 32 has a vibrator for notifying an incoming call signal of itself by vibrating. 33 are accommodated. By using such an LCD holder 15, the LED 27
It is possible to fix the sub-board 28, the LCD 16 and the vibrator 33, which are soldered together, at the same time.

As described above, the LCD substrate 15 has the sub-board 28 formed in the same process as the main board 14.
Compared with the conventional method in which the LED chip was wire-bonded to the sub-board by dedicated equipment,
It is possible to realize a backlight unit that can be installed at low cost. Further, since the LCD holder 15 is integrally formed with the vibrator holding portion 32 for holding the vibrator 33, the number of parts is reduced.

By the way, as shown in FIG. 4 (a), two long grooves 34, 34 and their sides are formed on one side of the short side of the main board 14 on which the two loop antennas 20, 21 are mounted. One small hole 35 is formed, and the antenna spacer 36 is attached by these two long grooves 34, 34 and one small hole 35. This antenna spacer 3
6 is made of resin and is shown in FIG. 4 (a), FIG. 4 (b), FIG. 5 (b), and FIG. 6 which is a sectional view taken along the line C-C of FIG. 5 (a). As described above, the slit portion 38 and the insertion step portions 39, 39 on both sides of the slit portion 38 are formed below the central portion of the main plate portion 37 that contacts the upper and lower sides of the outer loop antenna 20. It should be noted that one of the insertion steps 39 has an extension 39
a is formed. In addition, on the upper portion of the main plate portion 37, a step portion 40 that is higher than the main plate portion 37 and that contacts the inner loop antenna 21 is provided.
Is formed. Further, a cantilever arm 41 is integrally formed on one side of the main plate portion 37, and a small projection 42 that fits into the small hole 35 is formed at the tip of the cantilever arm 41.

The above antenna spacer 36 is laterally incorporated into the main board 14. That is, the insertion step portions 39, 39 of the main plate portion 37 are pushed into the two long grooves 34, 34, respectively, and part of the main board 14 is exposed in the slit portion 38. At this time, after the small protrusion 42 comes into contact with the main board 14 and the cantilever arm 41 elastically bends and deforms upward, the small protrusion 42 enters the small hole 35 to prevent the antenna spacer 36 from coming off. Becomes After attaching the antenna spacer 36 to the main board 14 in this manner, the inner loop antenna 21 is applied to the upper surface of the step portion 40 and the lower surface of the extension portion 39a of the antenna spacer 36, and the inner loop antenna 20 is attached to the antenna spacer 36. The two end portions of the loop antennas 20 and 21 are attached to the upper and lower surfaces of the main plate portion 37 of the main board 1.
Insert into the through hole (not shown) 4 and solder.

By using the antenna spacer 36, the two loop antennas 20 and 21 are held in both the upper and lower directions via the main substrate 14, so that the loop antenna is prevented from being deformed due to a shock such as a drop of a product. it can.
Further, since the outer loop antenna 20 abuts on the side surface of the step portion 40 above the antenna spacer 36, the outer loop antenna 20 can be held so as not to contact the inner loop antenna 21, and the presence of the step portion 40 The detachment of the antenna spacer 36 can be prevented.

As described above, the antenna spacer 36 laterally assembled to the main board 14 can hold the two loop antennas 20 and 21 in both the upper and lower directions, and the cantilever arm 41 and the tip thereof. Small protrusion 42
The antenna spacer 36 can be prevented from coming off, and the stepped portion 40 at the top can also prevent the antenna spacer 3 from being detached.
Since the detachment of 6 can be prevented, the antenna spacer 36 can be easily fixed without adding an additional component such as a double-sided tape for fixing which has been conventionally required.

Next, the three-dimensional rubber cover 70 made of an elastic member such as NBR which does not contain carbon resin as the insulating member for preventing static electricity intrusion mentioned in the above description will be described with reference to FIGS. 7 to 9. Explain. 7A is a plan view, FIG. 7B is a side view seen from the lower side, and FIG.
8A is a front view seen from the antenna cover side, FIG. 8B
Is a rear view seen from the back side of FIG. 7A, and FIG. 9 is FIG.
6 is a cross-sectional view taken along the line DD in FIG. That is, the rubber cover 70 has a bag-shaped antenna cover portion 71 having a shape that covers all the two loop antennas 20 and 21, and one surface of the main board 14 on which the two tact switches 18 and 19 are provided. It is in the form of a thin film integrally formed with a flat portion 72 that largely covers. Further, the flat portion 72 is formed with two switch cover portions 73 and 74 having a shape to cover the two tact switches 18 and 19, respectively.

The mounting state of the three-dimensional rubber cover 70 having the above structure is shown in the shaded area in FIGS. 10 to 12. When such a rubber cover 70 is attached, as shown in FIG. 3, the two loop antennas 20 and 21 are covered with a bag-shaped antenna cover portion 71 to cover the periphery thereof, and the two tacts of the main board 14 are attached. The flat portion 72 is placed on the surface having the switches 18 and 19. That is, the two tact switches 18 and 19 are covered with the switch cover portions 73 and 74, respectively, and the LSI 22 and the electronic components 23 and 2 are provided.
4 (see FIG. 2) and other various parts, and the flat part 72 is placed and covered. Then, the front end side of the flat portion 72 is set to L by the adhesive material 75.
Fix on SI22.

Since the three-dimensional rubber cover 70 covering many of the internal parts is mounted in this manner, the structure shown in FIGS.
2, the two tact switches 18, 19 on the main board 14 are completely covered by the switch cover portions 73, 74 of the flat portion 72 of the rubber cover 70. Therefore, the upper case 3 It is possible to prevent static electricity entering through the gaps between the operation holes and the operation keys 8 and 9 from reaching the tact switches 18 and 19. Further, the switch cover portions 73 and 74 are provided with the operation keys 8 and 9 respectively.
Is applied to the upper case 3 side in the upward direction, it is possible to prevent the operation keys 8 and 9 from being pushed off, and to prevent the keys 8 and 9 from chattering due to the vibration of the vibrator 33. it can.

Further, the flat portion 72 can protect the other internal components such as the LSI 22 and the electronic components 23 and 24 from static electricity. Since the periphery of the two loop antennas 20 and 21 is covered and hidden by the bag-shaped antenna cover portion 71 of the rubber cover 70, static electricity entering from the fitting gap between the upper case 3 and the lower case 4 is eliminated.
It is possible to prevent reaching the respective loop antennas 20 and 21.

By the way, in the first embodiment, the switch cover portions 73 and 74 formed by the rubber cover 70 are provided between the operation holes of the upper case 3 and the tact switches 18 and 19 on the main board 14, respectively. Since it is interposed, for example, the impact force from the operation keys 8 and 9 side can be absorbed by the elastic deformation of the switch cover portions 73 and 74, respectively. Therefore, each tact switch 18 on the main board 14 can be absorbed. , 19 can be provided with a shock absorbing function. Although the thin-film rubber cover 70 having a three-dimensional shape is used in the above-described first embodiment, for example, a convex portion is formed so as to eliminate a gap between the case body 2 and various components on the main board 14. By forming the, it is possible to expect a shock absorbing effect such as preventing the destruction of parts due to the product falling.

<Second Embodiment> Next, FIG. 13 shows a pager as a second embodiment of an electronic apparatus to which the present invention is applied, and FIG. 13 (a) shows operation keys. 13 is a side view seen from one side face side, FIG. 13 (b) is a plan view in which a part is cut away seen from the display face side, and FIG.
13A is an enlarged cross-sectional view showing the internal structure taken along the line AA of FIG. 13A, and FIG. 15 is a cross-sectional view showing the internal structure taken along the line BB of FIG. 13B.

In these FIG. 13 to FIG. 15, 10
1 is a pager (electronic device), 102 is a case body, 1
Reference numeral 03 is an upper case, 104 is a lower case, 105 is an LCD display unit, 106, 107, 108 and 109 are operation keys (key operation unit), 111 and 112 are substrates, 113 is a tact switch (switch component), and 120 is an insulating member. It is a member (rubber cover). In the second embodiment, a pager 101, which is an electronic device, has a case main body 102 composed of an upper case 103 and a lower case 104. As shown in the figure, the upper case 103 of the case main body 102 has an LCD.
A display unit 105 is provided. And the upper case 10
3 and the lower case 104, on one side surface of the case main body 102, four operation keys 10 in the illustrated example, which are key operation units, are provided.
6, 107, 108, and 109 are provided side by side.

Two substrates 111 and 112 are arranged and fixed in the case main body 102 so as to be separated from each other in the thickness direction thereof, and one of the substrates 111 and 112 (the other substrate 112) is fixed.
Side), the four operation keys 106, 107, 10 arranged side by side.
Tact switches 113, ..., Which are switch components corresponding to 8 and 109, respectively, are mounted. The two substrates 11 having such tact switches 113, ...
1,112 the four operation keys 106, 107 arranged side by side,
A three-dimensional rubber cover 120 is provided as an insulating member that collectively encloses one side of the side where 108 and 109 are arranged. That is, the rubber cover 120 is used for the two substrates 11
1 and 112 are thin film-like members integrally formed with a bag-shaped portion that is wrapped along one side of the side on which the tactile switches 113, ... Are located, and the constituent members thereof are the first embodiment described above. Similar to the above embodiment, the elastic member does not contain carbon resin such as NBR.

In this way, the two substrates 111 and 112 are
Since the bag-shaped rubber cover 120 that wraps around the side where the tact switches 113, ... Are laid is attached, the tact switches 113 ,. When the bag-shaped rubber cover 120 is wrapped, static electricity E entering from the gaps between the operation holes of the upper case 103 and the operation keys 106, 107, 108, 109 causes the tact switches 113 ,. Can be reached. Then, each operation hole of the upper case 103 and each tact switch 1 on the substrate 111.
Since the rubber cover 120 is interposed between 13, ..., For example, each operation key 106, 107, 108, 10
The impact force F from the 9 side can be absorbed by the elastic deformation of the rubber cover 120, that is, the impact buffering function for the tact switches 113 on the substrate 111 can be provided. In addition, the bag-shaped rubber cover 120
However, since a force P for pressing each operation key 106, 107, 108, 109 against the side surface side of the upper case 103 in the upward direction in the drawing is applied, each operation key 106, 107, 108, 1
09 can be prevented from being pushed off, and the operation keys 106, which are caused by vibration of a vibrator (not shown),
It is also possible to prevent an interference sound between the upper case 103 and 107, 108, 109.

In each of the above embodiments,
Although a pager or the like is used as the electronic device to which the present invention is applied, the present invention is not limited to this, and may be an electronic device such as another wireless device that is reluctant to intrude static electricity. Also, the shape of the insulating member is arbitrary depending on the arrangement of the device case or the operation key, and it is needless to say that the specific detailed structure and the like can be appropriately changed.

[0036]

As described above, according to the structure for preventing static electricity intrusion of electronic equipment according to the first aspect of the present invention, many electronic components can be collectively protected from static electricity by a single insulating member. Moreover, since it is only necessary to use a single insulating member that collectively encloses many electronic components, it is possible to obtain an advantage that the number of parts of the insulating member is minimum and the efficiency of the assembling work is improved. .

Further, according to the structure for preventing static electricity intrusion of the electronic device according to the second aspect of the invention, it is possible to effectively prevent static electricity from invading the loop antenna by the single insulating member.

Furthermore, according to the structure for preventing static electricity intrusion of the electronic device in accordance with the third aspect of the present invention, it is possible to effectively prevent static electricity from invading the switch parts by the single insulating member.

Further, according to the structure for preventing static electricity intrusion of the electronic device according to the invention of claim 4, in addition to the most effective prevention of static electricity intrusion for the switch component according to the invention of claim 3, the switch is provided. It is possible to prevent rattling and push-out of the key operation portion corresponding to the component, and also to provide a shock absorbing function for the switch component.

[Brief description of the drawings]

1A and 1B show a pager as a first embodiment of an electronic device to which the present invention is applied, in which FIG. 1A is a front view seen from a display surface side, and FIG. 1B is an upper surface side with operation keys. FIG. 3C is a plan view viewed from above, and FIG. 3C is a side view viewed from one side surface side with the hook pin.

FIG. 2 is an enlarged cross-sectional view showing an internal configuration taken along the line AA of FIG. 1 (b).

FIG. 3 is an enlarged cross-sectional view showing an internal configuration taken along the line BB of FIG. 1 (b).

4A and 4B are a plan view and a main mounting component, which are internal components before mounting an insulating member, and FIG.
[Fig. 3] is a side view seen from the side where the antenna is located.

FIG. 5 is a view showing internal parts before mounting an insulating member similarly to FIG. 4, in which (a) is a front view seen from the display section side;
(B) is a rear view seen from the opposite side.

6 is a cross-sectional view taken along the line CC of FIG. 4 (a).

FIG. 7 shows an insulating member, (a) is a plan view,
(B) is a side view seen from the lower side.

8A and 8B show an insulating member similar to FIG. 7, in which FIG. 8A is a front view seen from the antenna cover side, and FIG. 8B is FIG. 7A.
It is the rear view seen from the back side.

9 is a cross-sectional view taken along the line DD of FIG. 7 (a).

FIG. 10 shows a state in which an insulating member is attached to the internal parts, FIG. 10A is a plan view seen from the same direction as FIG. 4A,
FIG. 4B is a side view seen from the same direction as FIG.

11 is a view showing the mounting state of the insulating member as in FIG. 10, (a) is a plan view seen from the same direction as FIG. 5 (a),
FIG. 5B is a side view seen from the same direction as FIG.

12 is a rear view seen from the back side of FIG. 10 (a), showing the mounted state of the insulating member as in FIG.

13A and 13B show a pager as a second embodiment of an electronic device to which the present invention is applied, where FIG. 13A is a side view seen from one side with an operation key, and FIG. It is the top view which notched one part seeing from the side.

FIG. 14 is an enlarged cross-sectional view showing the internal structure along the arrow AA line in FIG.

FIG. 15 is a cross-sectional view showing the internal structure along the line BB of FIG. 13 (b).

FIG. 16 is an enlarged view of FIG. 14 for explaining the operation according to the second embodiment of the present invention.

[Explanation of symbols]

 1 Pager (Electronic Equipment) 2 Case Body 8, 9 Operation Keys 14 Main Board 15 LCD Holder 18, 19 Tact Switch (Switch Parts) 20, 21 Loop Antenna 22 LSI 23, 24 Electronic Parts 27 Back Light Source (LED) 28 Sub-board 30,31 Clamping rib 32 Vibrator holding part 33 Vibrator 34 Long groove 35 Small hole 36 Antenna spacer 37 Main plate part 38 Slit part 39,39 Insertion step part 39a Extension part 40 Step part 41 Cantilever arm 42 Small projection 70 Insulation member ( Rubber cover 71 Bag-shaped antenna cover 72 Flat 73,74 Switch cover 75 Adhesive 101 Pager (electronic device) 102 Case body 106,107,108,109 Key operation 111,112 Board 113 Tactos Switch (switch part) 120 Insulation member (rubber cover)

Claims (4)

[Claims] 1. A structure for preventing static electricity from entering an electronic device, wherein various electronic components are housed in a case body, wherein an insulating member is arranged so as to wrap most of the electronic components together. A structure that prevents static electricity from entering electronic devices. 2. The electronic component according to claim 1, wherein the electronic component includes a loop antenna, and the loop antenna is arranged so that at least a part thereof is covered with the insulating member. A structure that prevents static electricity from entering the equipment. 3. The electronic device according to claim 1, wherein the electronic component includes a switch component, and the switch component is arranged so as to be covered with the insulating member. Static electricity intrusion prevention structure. 4. The electronic device includes an operation key for externally operating the switch component, the insulating member is made of an elastic member, and is interposed between the switch component and the operation key. The static electricity intrusion prevention structure for an electronic device according to claim 3, wherein the structure is arranged as follows.