JPH08248155A - Portable radio - Google Patents

Abstract

PURPOSE: To provide a portable radio in which a battery lid can be attached and removed easily by a simple structure in which the battery lid can be formed to be an arbitrary shape and further a body case can be made thin. CONSTITUTION: A portable radio is provided with a battery housing part which is formed so as to be capable of housing a button-shaped battery 11 from an opening part 27 opened on the rear side of a body case and with a battery lid 25 which is fitted to the edge part 24a of the body case forming the opening part 27 and which closes the opening part 27. The battery lid 25 comprises a protrusion part 25c which protrudes to a direction nearly parallel to the rear of the body case, and a gap 26 is formed between the protrusion part 25c and the rear which is faced with the part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable wireless device such as a so-called pager, and more particularly to a portable wireless device such as a wrist watch type or a card type equipped with a button type battery.

[0002]

2. Description of the Related Art An electronic wristwatch disclosed in Japanese Patent Laid-Open No. 53-110563 is known as a portable electronic device equipped with a button-type battery of this type. This electronic wrist watch is fitted with a battery storage portion formed so that a button-type battery can be stored through an opening opening on the back side of the watch case and an edge portion of the watch case forming the opening to close the opening. And a battery lid. The battery lid is provided with a groove portion that engages with a coin or the like as a jig for attachment / detachment at a position eccentric to the side opposite to the battery housing portion with the opening closed.

In this electronic wrist watch, after the coin is engaged with the groove, the coin is twisted and the battery cover is rotated to release the fitted state between the battery cover and the watch case. Can be removed. In this case, by forming the groove portion in a position eccentric to the side opposite to the battery housing portion, the portion protruding inside the watch case due to the formation of the groove portion does not hit the button-type battery, so the thickness of the protruding portion Only the watch case has been made thinner.

[0004]

However, this electronic wrist watch has the following problems. That is, firstly, even though the watch case is made thinner, the protruding part protrudes inside the watch case, so that when the battery lid is rotated, the part is not included in the locus drawn by the protruding part. There is a problem that it cannot be arranged, and accordingly, a wasteful space is generated in the watch case.

Secondly, the portable radio device is provided with an analog circuit such as a high frequency circuit, unlike an electronic wrist watch which is mostly composed of digital parts. Therefore, at the manufacturing stage of the portable radio device, various portable radio devices are required. It is necessary to adjust the constants of analog components. However, if the structure of the battery cover in a conventional electronic wristwatch is applied to a portable wireless device, the analog component for adjustment should be placed directly below the battery cover and the analog component should be adjusted with the battery cover removed. There is a problem that it becomes difficult. This is formed as a perfect circle because the battery cover of an electronic wristwatch is rotated and attached / detached, but in a portable wireless device, all analog components for adjustment are ignored, ignoring the flow of signals such as high-frequency signals. Because it cannot be placed in that perfect circle. on the other hand,
If the diameter of the battery cover is increased, it is possible to place all the adjusting analog components directly under the battery cover. However, in such a case, since the locus of the projecting portion increases with the rotation of the battery lid, the wasted space further increases. Further, although it is possible to dispose the adjusting analog component directly below the locus, in such a case, there arises a problem that the case thickness increases.

The present invention has been made to solve the above problems, and the battery lid can be easily attached and detached with a simple structure, and the battery lid can be formed into an arbitrary shape. The main object of the present invention is to provide a portable wireless device that can be made thin and can be made thin.

[0007]

In order to achieve the above object, the portable wireless device according to claim 1 is a battery housing portion formed so that a button-shaped battery can be housed through an opening opening on the back side of the main body case. And a battery lid that closes the opening by fitting with an edge of the body case forming the opening, the battery lid having a protrusion protruding in a direction substantially parallel to the back surface of the body case. And a gap is formed between the protrusion and the back surface facing the protrusion.

In this portable radio device, the battery lid can be easily removed by inserting a coin or the like into the gap formed between the protruding portion and the back surface facing the protruding portion and prying it open. Also, after the shape of the opening and the shape of the battery lid are matched, the battery lid is pushed in to fit the edge of the battery lid, so that the battery lid can be easily mounted. As described above, the battery lid can be formed in an arbitrary shape because the structure is not such that the battery lid is rotated and attached / detached. Also, the inner surface of the battery lid (side surface of the main body case)
Since it can be made flat, no unnecessary space is generated in the main body case.

According to a second aspect of the present invention, there is provided the portable radio device according to the first aspect, wherein the gap is formed by thinning a case thickness at a portion of the main body case facing the protrusion. It is characterized by

In this portable radio device, since the thickness of the main body case is thinned by the amount of the gap, the thickness of the main body case is not increased even if the gap is formed.

According to a third aspect of the present invention, there is provided a portable radio device according to the first or second aspect, in which a convex portion protruding toward the opening is formed on an edge portion and a convex portion is formed on an outer periphery of the battery lid. It is characterized in that a concave portion into which the parts can be fitted is formed.

A portable radio device according to a fourth aspect is the portable radio device according to the first or second aspect, in which a recessed portion that is recessed toward the main body case is formed at the edge portion, and the recessed portion is fitted on the outer periphery of the battery lid. It is characterized in that a compatible convex portion is formed.

According to another aspect of the portable wireless device of the present invention, a convex portion formed on an edge portion or an outer periphery of the battery lid,
The battery lid can be easily attached to the main body case by fitting the recess on the outer periphery of the battery lid or the edge of the opening.

A portable radio device according to a fifth aspect is the portable radio device according to the third aspect, wherein the concave portion and the convex portion are
It is formed along the entire circumference of the battery lid and the entire circumference of the edge portion, and on either one of the bottom of the concave portion and the top of the convex portion,
A rubber member is provided.

A portable radio device according to a sixth aspect is the portable radio device according to the fourth aspect, wherein the convex portion and the concave portion are
It is formed along the entire circumference of the battery lid and the entire circumference of the edge portion, and on either one of the top of the convex portion and the bottom of the concave portion,
A rubber member is provided.

In the portable wireless device according to the fifth and sixth aspects, the rubber member disposed at either the bottom of the concave portion or the top of the convex portion at the portion where the battery lid and the body case are fitted together is the packing. By functioning as, the degree of adhesion between the battery lid and the main body case is improved. Therefore, it is possible to configure a portable wireless device having excellent waterproofness. Further, the rubber member can be disposed on the recess side by so-called two-color molding, and in such a case, the battery lid or the main body case and the rubber member can be integrally molded, which reduces the manufacturing cost. can do. Further, since the rubber member is hard to be removed, the battery lid can be easily attached and detached, and the rubber member is not lost when removing the battery lid.

A portable radio device according to a seventh aspect is the portable radio device according to the fifth or sixth aspect, wherein a groove is formed along the top and a rubber member is disposed in the groove. To do.

In this portable radio apparatus, by fitting the rubber member in the groove formed on the top side, the rubber member is prevented from coming off, and the battery lid can be easily removed. Also in this case, the battery cover or the main body case and the rubber member can be integrally molded by two-color molding or the like.

The portable radio apparatus according to claim 8 is the portable radio apparatus according to any one of claims 1 to 7.
A band for mounting the main body case on the arm is provided, and the projecting direction of the projecting portion is within a range of 90 ° to an acute angle with respect to the band direction of the band.

In this portable radio apparatus, the protruding direction of the protruding portion is within the range of 90 ° to the acute angle with respect to the band direction. Therefore, for example, when the coin is squeezed into the gap to pry it open, The battery cover can be easily removed without the arm hitting the band.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a portable radio apparatus of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a vibration and LE according to an embodiment of the present invention.
The external view of the wristwatch-type wireless selective call receiver (portable wireless device, hereinafter referred to as “receiver R”) that performs notification by D is shown. The receiver R includes a main body case 1 and a band B for mounting the main body case 1 on an arm. The main body case 1 has a cover glass 2 and a vibration motor 9 (FIG. 2) which is an example of a vibration device. (Refer to FIG. 3), the protruding portion 3 of the main body case 1 for housing the LED 10, the switch button portions 5a and 5b.
And a liquid crystal panel 6 are provided. The liquid crystal panel 6 and the LED 10 in FIG.
The state when seen through is shown.

FIG. 2 is a sectional view taken along line XX of FIG. As shown in the figure, inside the main body case 1, a slot antenna 7 which is an example of an antenna body, printed boards 8a and 8b on which a circuit group described later is mounted, a vibration motor 9, an LED 10, and a button type battery are provided. A certain air battery 1
1 are arranged respectively. A back lid 13 is fitted on the back side, and a battery lid 25 is further fitted on the back lid 13, and a battery housing portion for housing an air battery is formed on the body case 1 side of the battery lid 25. Has been done. In addition,
Reference numeral 14 indicates the arm of the arm user. Further, the circuit group described above includes an IC molded body 150 in which a data decoder circuit and a CPU circuit are integrated, a chip element 151 for driving the IC, and chip elements 152 and 155 forming a wireless reception circuit. It is composed of an IC 153 that performs direct conversion reception. Also, reference numeral 1
Reference numeral 54 indicates a shield case covering the local oscillation circuit.

FIG. 3 is an internal configuration diagram in which the surface of the main body case 1 of FIG. 1 is removed. The vibration motor 9 is arranged substantially parallel to the band B at the 9 o'clock position on the wristwatch, and when mounted on the left arm, the protrusion 3 of the main body case 1 does not hit the wrist and has a structure with excellent portability and wearability. Has become. Conversely, band B at the 12 o'clock or 6 o'clock position
When the vibration motor 9 is arranged in the direction orthogonal to the direction, the main body case 1 becomes too long in the direction from 12:00 to 6:00 and the wearability on the arm deteriorates. It looks large and has a heavy image, which is not preferable. Although the example in which the vibration motor 9 is arranged at the 9 o'clock position has been described in FIG. 4, an example of a product that is supposed to be mounted on the right hand is shown in FIG. In this case, the same effect as described above can be obtained by disposing the vibration motor 9 at the 3 o'clock position.

Further, as shown in FIG. 2, the vibration motor 9
Is a state in which the plastic member 4 is interposed on the upper side of the vibration motor 9 and the inner wall of the projecting portion 3 of the main body case 1 and the back cover 1
It is sandwiched between 3 and. The back cover 13 is easy to transmit vibration,
In addition, in order to ensure the durability of the battery lid 25, a hard material is preferable, and it is preferable to use polycarbonate or the like. Further, the shape of the back cover 13 on the side where the vibration motor 9 is arranged is complementary to the surface shape of the vibration motor 9. Although the cross-sectional shape is circular in the figure, if the surface of the vibration motor 9 is flat,
It is preferable that the planar shape has good adhesion, and if it is wavy, the wavy shape that meshes with it is preferable. Also, the arm 1 of the case back 13
4 has a flat arm contact surface 13a that comes into contact with the back cover 1
The end surface 13b of 3 is obliquely cut. As a result, the boundary portion between the arm contact surface 13a and the end surface 13b serves as an edge to make it easier to feel vibration, and at the same time, makes the main body case 1 appear thin when viewed from the side. As a result, when the vibration motor 9 operates to start vibration, the vibration is transmitted to the back cover 13 and efficiently transmitted to the arm 14 at the arm contact surface 13a.

FIG. 5 is a detailed view of a portion B of FIG. 3, showing the air intake hole 16. As shown in the figure, the air intake hole 16 is formed in the side surface portion of the projecting portion 3 in the main body case 1.
Is formed, and the air intake hole 1 inside the main body case 1 is formed.
A breathable waterproof membrane 15 is disposed in the opening of 6.
The receiver R has a structure in which water droplets and dust that are scattered from the outside and sweat that is transmitted from the arm are hard to enter. Specifically, FIG. 7 shows the position of the receiver R when worn on the arm and the direction in which water drops may be received.
The receiver R is likely to receive water droplets splashing from the directions 33, 34, and 35. In other words, if the user has washed their hands, or if they have a umbrella on a rainy day, the direction 33,
Water may be scattered from 34, and when drinking, the drink may be scattered from direction 35. However, the air intake hole 16 in FIG. 5 can prevent water droplets or the like scattered from all of these directions 33 to 35 from entering the main body case 1.

Next, the specific structure of the air intake hole 16 will be described. Although FIG. 8 is an enlarged view of the vicinity of the air intake hole 16, the convex portion 32 is provided near the air intake hole 16. Further, the bending direction of the air intake hole 16 is the direction 3
3 has an acute-angled intersecting relationship, and this configuration can prevent moisture from entering in the direction 33.

FIG. 9A shows the opening 1 of the air intake hole 16.
6a is a view of 6a as seen from the arrow E side in FIG. As the shape of the opening 16a, in addition to the circular shape, various shapes such as an elliptical shape and a configuration in which a lattice is put on them are conceivable. When the grid is attached, it is convenient because dust is hard to enter even though the area of the opening 16a is large.
Needless to say, a plurality of openings may be arranged in parallel as shown in FIG.

FIG. 10 is an enlarged view of the vicinity of the breathable waterproof membrane 15. The breathable waterproof film 15 is adhered to the projecting portion 3 of the main body case 1 with the double-sided tape 29, and is pressed by the cushioning member 30 from behind. The cushioning member 30 is a member that can fix the breathable waterproof membrane 15 from the back and allows air to pass through, and a sponge or the like is preferable. This prevents the breathable waterproof film 15 from peeling off even if an impact is applied from the outside of the air intake hole 16.

The breathable waterproof film 15 has a function of passing air but blocking water, and supplies oxygen in the air to the air battery 11 housed in the main body case 1 to operate it. Even if the breathable waterproof film 15 is provided, it is preferable to set the air intake hole 16 at a place where it is less likely to be affected by the outside. Therefore, as described above, the air intake hole 16 is provided in the receiver R. It is formed at a position where water is least likely to be splashed when, for example, washing hands with the arm worn on the arm. Further, since the breathable waterproof film 15 can be stretched on the flat part of the case by forming it at this position, the assembling workability is good and the reliability against peeling is high. Further, since the air intake hole 16 does not linearly penetrate from the outside to the inside, the air-permeable waterproof film 15 may have a sharp tip from the outside.
Never be beaten.

FIG. 11 is a sectional view taken along line YY of FIG. The cushioning member 30 is also used as a pressing member for the vibration motor 9 in the axial direction. The provision of the air intake hole 16 on the side portion of the projecting portion 3 of the main body case 1 means that the cushion member 3
0 is used effectively in terms of space efficiency,
This is also extremely effective in reducing the size of the receiver R.

FIG. 6 is a detailed view of the portion A in FIG. 2, showing the periphery of the LED 10. In the figure,
Reference numeral 17 indicates the ink printed on the cover glass 2,
Reference numeral 18 denotes a portion that is not printed on the cover glass 2 and is a colorless transparent portion. When the LED 10 mounted on the printed circuit board 8a is lit by a lighting signal,
The LED 10 is provided through the colorless transparent portion 18 of the cover glass 2.
Light is emitted to the outside. This allows the user to know that there is received information addressed to himself by the light. The LED 10 is capable of emitting a plurality of colors, and an alarm drive circuit 107, which will be described later, outputs a lighting signal according to the content of the received information, so that the LED 10 emits light in a color according to the lighting signal. . Therefore, the color of the light allows the user to intuitively understand the approximate content of the received information, for example, whether it is an emergency contact or a normal contact. In addition, the cover glass 2 is a circuit internal element mounted on the printed circuit board 8a or the liquid crystal panel 6
Protects the vehicle from external shocks and also serves as a waterproof function.

By covering the liquid crystal panel 6 and the LED 10 with the cover glass 2 in this manner, as in the other internal parts of the main body, only one place between the cover glass 2 and the main body case 1 has a waterproof structure. Cover glass 2
It is possible to waterproof various parts underneath. If the LED 10 is arranged in a place other than the lower portion of the cover glass 2, it is necessary to provide an opening in the main body case 1 and to make the opening into another new waterproof structure. Compared with such a case, since the number of parts for the waterproof structure can be reduced in configuring the receiver R, the device can be downsized, and the parts for the waterproof structure and the mounting cost thereof can be reduced. can do.

As can be seen from FIG. 1, the LED 10
Is disposed between the liquid crystal panel 6 and the switch button portions 5a and 5b. For this reason, the visibility is excellent, and the user can confirm the incoming information of the received information by the LED 10, confirm the content of the received information by the liquid crystal panel 6, and operate the switch button portions 5a and 5b without moving the line of sight. Can perform continuous actions. At the same time, even when the surroundings are dark, it is possible to know that some information is notified by lighting the LED 10 by the lighting signal. In addition, the LED 10 is located at a position easily associated with the switch buttons 5a and 5b located obliquely below the LED 10, and the light of the LED 10 illuminates the surrounding liquid crystal panel 6 and the switch buttons 5a and 5b. Therefore, the information received by the liquid crystal panel 6 can be easily confirmed, and the switch button unit 5 can be used at night.
In a situation where the positions of a and 5b are not clearly known, and when it is desired to stop the vibration of the vibration motor 9 when a notification is given, the switch button portions 5a and 5b can be operated easily and reliably by relying on the lighting of the LED 10.

FIG. 12 shows a cross-sectional view of the cover glass 2 above the LED 10. LE on the cover glass 2
A protruding portion 2a, which is located directly above D10 and has a part raised outward, is formed. Since the protruding portion 2a has a lens effect and disperses the light of the LED 10, the user can surely know that the notification has been given even when the receiver R is viewed obliquely. In addition, the projection 2a scatters the light of the LED 10 to surround the liquid crystal panel 6 and the switch button 5
Since a and 5b are illuminated, confirmation of the contents of received information and switch operation can be performed reliably and easily even when the surroundings are dark.

FIG. 13 is a sectional view showing the structure of the switch button portions 5a and 5b (the switch button portion 5a is shown as a representative in the figure). Switch button parts 5a, 5
Reference numeral b denotes a front button 20, a coil spring 21 for appropriately adjusting the pushing force of the front button 20, a retaining ring 22 for preventing the front button from coming off, and a conductive rubber 23.
And are provided respectively. This switch button portion 5a,
5b, when a force is applied from the direction C in the figure, the front button 20 is first pushed, and accordingly, the conductive rubber 23 is further pushed to form two patterns (FIG. 5) formed on the printed circuit board 8a. By contacting each other (not shown), the same function as the ON operation of the switch is exerted.

As described above, since the front button 20 is arranged on the front surface, the receiver R has excellent operability. Further, since the front button 20 is not arranged on the side surface of the main body case 1, the slot antenna 7 can be arranged along the inner periphery of the side surface of the main body case 1 (see FIG. 3). Therefore, as compared with the case where the operation switch is arranged on the side surface of the main body case 1, the antenna size can be increased, so that the reception sensitivity can be improved. In addition, since the slot antenna 7 is not punctured and the antenna performance is not deteriorated, the slot antenna 7 can have excellent antenna characteristics. In addition to the slot antenna, any antenna such as a loop antenna, a dipole antenna, and an inverted F antenna may be used as the antenna that circulates inside the body case 1. Can be secured.

FIG. 14 is an external view of the back surface of the main body case 1 in FIG. 1, showing a back cover structure. As shown in the figure, on the back side of the main body case 1, a back lid 24 and a battery lid 2 fitted to the back lid 24 and made of a plastic member.
5 are provided. The battery lid 25 is formed in a shape having protrusions at both ends of the long axis of the ellipse. The projecting portion 25 c projects in a direction intersecting the band direction of the band B at about 45 ° and in a direction substantially parallel to the back surface of the body case 1.

FIG. 15 is a sectional view taken along line RR of FIG. 14, in which the battery lid 25 has a convex portion 25a along its outer periphery.
And a concave portion 25b is formed between the convex portion 25a and the body plate of the battery lid 25. On the other hand, on the back cover 24, a convex portion 24b protruding toward the opening 27 is formed along the outer periphery of the edge 24a forming the opening 27 for housing the air battery 11. The convex portion 24 b is fitted into the concave portion 25 b of the battery lid 25, so that the battery lid 25
Fits into the back cover 24. More specifically, the battery lid 25
The back cover 24 is formed by the inner surfaces of the edge portion 25d (or the protruding portion 25c) of the bottom surface portion and the protruding portion 25a that face each other.
It is fitted to the back cover 24 by sandwiching the convex portion 24b. In addition, the projecting portion 25c of the battery lid 25 and the case lid (which corresponds to the main body case thickness in the present invention) in the back lid 24 that faces the projecting portion 25c are formed to have a thin thickness. A gap 26 is formed between the front surface (corresponding to the back surface of the main body case in the present invention) and a size such that a coin or the like as a jig for removal can be slipped thereinto. Accordingly, the user can easily remove the battery lid 25 from the main body case 1 by slipping a coin into the gap 26 and prying it open, and the main body case does not become thick even when the gap 26 is formed. .

FIG. 16 shows a state in which the coin lid K is used to remove the battery lid 25. In this case, the protrusion 2
The protruding direction of 5c is about 45 with respect to the band direction of band B.
Since the angle is °, the fist or arm does not hit the band when the user holds the coin K, and the battery lid 25 can be easily removed from the main body case 1. When the battery lid 25 is attached to the main body case, the shape of the opening 27 and the shape of the battery lid 25 are matched, and then the battery lid 25 is pushed into the back lid 24 side. In this way, the battery lid 25 can be attached and detached without using a special tool or the like, so that the battery can be easily replaced. Further, since the battery lid 25 is not structured to be rotated and attached / detached, the battery lid 25 can have any shape. As a result, for example, adjustment parts of the transmission / reception wireless unit 102, which will be described later, can be freely arranged directly below the battery lid 25, and therefore the adjustment parts can be adjusted with the battery lid 25 removed. it can. As a result, it is not necessary to fix the constants such as capacitors and coils, so that it is possible to use parts with low accuracy of constants and also to design them as adjustment parts. In addition, even when the constants of the parts are changed after the product is shipped due to changes in the environment or aging, it is possible to easily adjust the constants of the parts with the battery cover 25 removed without disassembling the main body case 1. You can Furthermore, since it is not necessary to provide a groove or the like for rotating the battery lid 25 with a coin or the like, the battery lid 25 can be made thin, and as a result, no unnecessary space is generated in the main body case 1, and The thickness can be reduced.

FIG. 17 is a detailed view of the portion D in FIG. 15, and reference numeral 28 is a waterproof packing made of an elastomer (rubber member) formed on the outer periphery of the battery lid 25. The packing 28 can be formed integrally with the battery lid 25 by molding polycarbonate, which is a material of the battery lid 25, and an elastomer by so-called two-color molding. Therefore, the packing 28 is a waterproof structure such as a separate O-ring packing. There is no possibility that the battery lid 25 will be twisted or lost when the battery lid 25 is attached or detached. Further, by forming by two-color molding, the molding can be performed by one molding machine and the molding can be performed in continuous steps, so that the cost can be reduced. Further, according to the present embodiment,
Since only the battery lid 25 is removed when the battery is replaced, the side portion of the main body case 1 can be obliquely cut like the end surface 13b in FIG. 2, and the outer shape closer to that of a wristwatch can be obtained. realizable.

Next, the electric circuit of the receiver R will be described.

FIG. 18 is a block diagram showing the circuit configuration of the receiver R. As shown in the figure, the receiver R includes the above-mentioned slot antenna 7, a transmission / reception radio unit 102 for transmitting and receiving radio frequencies, a waveform shaping circuit 103 for shaping the waveform of a received signal, and a control unit 105 described later. P-ROM on which the unique call signal to be compared in
(Programmable read only memory) 106,
An alarm drive circuit 107 for transmitting that the received information is stored, an alarm device 108 including a buzzer, an LED 10 or a vibration motor 9, and the switch button portion 5a described above for operating the radio R. , 5b and the liquid crystal panel 6 described above.
And a message processing unit 114 that controls each circuit of each of these units and processes received information. The message processing unit 114 controls the power supply control circuit 104 that controls power supply to the transmission / reception radio unit 102 and the waveform shaping circuit 103, the control unit 105 that controls the power supply control circuit 104 and processes received information, and temporarily receives information and the like. A RAM 109 for temporarily storing, an LCD drive circuit 110 for displaying the received information processed by the control unit 105 on the liquid crystal panel 6, and an oscillation circuit 111 for sending a clock signal used for controlling the LCD drive circuit 110. I have it.

Of these constituent elements, the transmission / reception radio section 102 and the waveform shaping circuit 103 are the same as those shown in FIG.
C153 and the chip elements 152 and 155, the message processing unit 114 and the P-ROM 106 correspond to the molded body 150, and the alarm drive circuit 107 corresponds to the chip element 151.

In the receiver R, a signal transmitted at a predetermined line frequency is demodulated by the transmission / reception radio section 102 via the slot antenna 7 and converted into a rectangular wave by the waveform shaping circuit 103. Electric power is supplied to the waveform shaping circuit 103 and the transmission / reception wireless unit 102 under control of the control unit 105 and the power supply control circuit 104 only during a time when a signal is received. The control unit 105 generates a battery saving timing signal for managing such power supply, controls the power supply control circuit 104, and performs bit synchronization and frame synchronization with the received signal. Further, the control unit 105 compares the peculiar calling signal recorded in the P-ROM 106 with the received signal supplied from the waveform shaping circuit 103 with error control, and the recorded peculiar calling signal is called. It is determined whether or not it has been hit. The control unit 105 also has a measurement function of measuring a signal from the oscillation circuit 111, which is a reference signal source such as a crystal.

In this case, when the call is confirmed, the reception information (message data) follows the unique call signal.
Is received and stored in the RAM 109. Then, the alarm device 108 informs the user via the alarm drive circuit 107 that the user has called. RAM
The message stored in 109 is the external operation unit 11
3 is operated to control LC via the control unit 105.
It is output to the D drive circuit 110, and the LCD drive circuit 110
Causes the liquid crystal panel 6 to display the received information while being controlled based on the clock signal output from the oscillation circuit 111.

FIG. 19 shows the alarm drive circuit 1 shown in FIG.
It is a signal waveform diagram of the alarm device drive signal output from 07. Here, the alarm device 108 uses the vibration motor 9 as a vibration device. When the control unit 105 reads the received code as the corresponding code, the control unit 105 immediately outputs the intermittent drive signal 200. The drive signal 200 has an on time t1 of 3/8 seconds and an off time t2 of 5/8 seconds. Then, the alarm drive circuit 107 repeatedly outputs the drive signal 200 for eight cycles, with this being one cycle. The vibration motor 9 intermittently transmits the vibration to the user by rotating for only the on-time t1 according to the drive signal 200. As a result, the user can surely know that there is received information addressed to himself.

By setting the ratio of the on-time t1 to the off-time t2 to this extent, the user can set the drive signal 20
Even if you do not notice it at the beginning of 0, drive vibration 200
Since the rising edge of is periodically generated, it is possible to surely know that there is received information. In this case, the duty ratio of the on time t1 in one cycle is set to 1/8 to 8 /
8 steps can be changed in 8 steps, and P-ROM 106
By changing the storage data of, the duty ratio can be easily set according to the preference.

20 and 21 show the voltage change waveform 202 at the end of the air battery 11 which is constantly observed by the control unit 105.
204 and the drive signal 200 of the vibration motor 9 are associated with each other. In this case, the end of the air battery 11 is
This is the time immediately before the nominal battery capacity is exhausted by continuous use. For example, air battery PR-2330
Has a nominal capacity of 850 mAh, and in this case, the end stage is when 700 to 800 mAh is used up. Time T
1 is the time for the control unit 105 to detect the battery voltage of the air battery 11. Actually, the time T1 is preset as 8 seconds after the output of the drive signal 200 is finished. Furthermore, the voltage 205 is the battery voltage lower limit (warning voltage) that the receiver can use, and
Stored in ROM 106.

At time T1, the control unit 105 compares the warning voltage 205 with the battery voltages 202 and 204, and if the battery voltages 202 and 204 fall below the warning voltage 205, the operation of the transmission / reception wireless unit 102 is stopped, At this point, the transmission / reception wireless unit 102 cannot receive.

When the drive signal 201 has an on time t1 of 3/8 seconds and an off time t2 of 5/8 seconds as in this embodiment, as shown in FIG. It takes about 0.03v to recover the original battery voltage within a few seconds. Therefore, in such a case, the control unit does not stop the operation of the transmission / reception wireless unit 102 at time T1. Thus, the receiver R in this embodiment
Then, by intermittently driving the vibration motor 9 as shown in FIG. 20, the decrease in the battery voltage of the air battery 11 at time T1 can be reduced, and as a result, the battery capacity of the air battery 11 can be used up effectively. .

On the other hand, the ON time of the drive signal 203 is set to 8/8.
If the time is set to seconds, as shown in FIG. 21, the vibration is continuous for 8 seconds. In such a case, the vibration motor 9 has 60
A current of ˜70 mA flows, the supply of oxygen to the air battery 11 is insufficient, the battery voltage drops to 0.6 V at once, and it takes 5 minutes to return to the original voltage even after the end of vibration. In addition, the battery voltage of the air battery 11 at the end of no load is
It is about 1.1 v, and the decrease of 0.6 v is a non-negligible amount. Therefore, in this case, the control unit 105
At time T1, the operation of the transmission / reception wireless unit 102 is stopped. Further, even if the battery is not a terminal battery, the battery voltage greatly drops when the vibration motor 9 is operating, and it takes time to return to the original voltage. Therefore, if warning voltage detection is performed during that time, at this point It will be judged as the battery life. Therefore, the continuous drive of the vibration motor 9 as shown in FIG. 21 does not effectively use the air battery 11.

Next, regarding another embodiment of the receiver R,
This will be described with reference to FIGS. The same components as those in the above-described embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

22 to 24 show a fitting structure of the back cover 24 and the battery cover 25, respectively. In the fitting structure shown in FIG. 22, the back lid 24 is formed with a recessed portion 24d that is recessed inward, and the protrusion 2 that fits into the recessed portion 24d is formed on the outer periphery of the battery lid 25.
5e is formed. A waterproof packing 28a made of an elastomer is provided at the bottom of the recess 24d of the back cover 24. Further, in the fitting structure shown in FIG. 23, the groove portion 25 is provided along the top of the convex portion 25e of the battery lid 25.
f is formed, and a waterproof packing 28b made of an elastomer is disposed in the groove 25f. Further, in the fitting structure shown in FIG. 24, the groove 24e is formed along the top of the protrusion 24b formed along the outer periphery of the edge 24a of the back cover 24, and the groove 24e is made of an elastomer. A waterproof packing 28c is provided. Also in these embodiments, the song lid 24 and the battery lid 25 are fitted together, and the back lid 2 is provided by the packings 28a to 28c.
4 and the battery lid 25 have an improved degree of adhesion, and have a structure excellent in waterproofness. Since the packings 28b and 28c are fitted in the groove portions 24e and 25f, the battery lid 25
It does not come off when attaching or detaching. Note that the packings 28a to 28c in these embodiments also have
It can be integrally formed with the battery lid 25 or the back lid 24 by two-color molding.

In the above embodiment, an example in which the battery lid 25 is fitted to the back lid 24 has been described, but the present invention is not limited to this. The main body case 1 is provided with the opening 27, and the opening 27 is provided with the battery. The lid 25 may be directly fitted.

Further, in the present embodiment, an example in which the projecting direction of the projecting portion 25c of the battery lid 25 intersects the band direction of the band B at about 45 ° has been described.
When the battery lid 25 is removed by such a method, the direction may be such that the fist or arm does not hit the band B, and the angle may be within the range of 90 ° to 15 ° with respect to the band direction.

Further, in the present embodiment, the example in which the air battery 11 is used as the button type battery has been described, but the present invention is not limited to this, and all button type batteries such as a lithium battery, a silver oxide battery and an alkaline battery are used. Applicable.

[0058]

As described above, according to the present invention, the main body case and the battery lid are fitted together, and a gap is formed between the protruding portion of the battery lid and the back surface of the main body case that faces the protrusion. Despite the simple structure, the battery lid can be easily removed and the battery lid can be formed into an arbitrary shape by inserting a coin or the like into the gap and prying it open. For this reason, adjustment parts and the like can be freely arranged directly below the battery lid. Further, since the battery cover is attached by pushing it into the main body case and can be removed by prying it open, it is possible to eliminate unnecessary space in the main body case, and as a result, it is possible to make the main body case thinner. it can.

Further, since the projecting portion of the battery lid is arranged in the range of 90 ° to an acute angle with respect to the band direction of the band, when the coin or the like is inserted into the gap to pry it open, Since the fist and arm do not hit, the battery cover can be easily removed from the case.

[Brief description of drawings]

FIG. 1 is an external view of a wristwatch-type wireless selective call receiver according to the present embodiment.

FIG. 2 is a cross-sectional view taken along line XX of FIG.

FIG. 3 is an internal configuration diagram in which a surface of a main body case 1 of FIG. 1 is removed.

FIG. 4 is an example in which a vibration motor is arranged at a position of 3 o'clock in FIG.

FIG. 5 is a detailed view of a B part in FIG. 3 showing an air intake hole.

FIG. 6 is a detailed view of a portion A of FIG. 2 regarding an arrangement of LEDs.

FIG. 7 is a diagram showing a position of a receiver when worn on an arm and a direction in which water may be received.

FIG. 8 is an enlarged view of the vicinity of an air intake hole.

9A is a diagram showing an opening of an air intake hole, and FIG. 9B is a diagram showing an opening of another embodiment.

FIG. 10 is an enlarged view of the vicinity of a breathable waterproof membrane.

11 is a sectional view taken along line YY of FIG.

FIG. 12 is a cross-sectional view of a cover glass near a portion right above an LED.

FIG. 13 is a cross-sectional view showing the structure of the switch button portion according to the present embodiment.

FIG. 14 is a back view of the main body case with the battery lid and the back lid fitted together according to the present embodiment.

15 is a sectional view taken along line RR in FIG.

FIG. 16 is an external view when the battery lid is opened using a coin.

FIG. 17 is a detailed view of section D in FIG.

FIG. 18 is a block diagram showing a circuit configuration of a wristwatch-type wireless selective call receiver according to the present embodiment.

FIG. 19 is a signal waveform diagram of an alarm device drive signal output from the alarm drive circuit.

FIG. 20 is a signal waveform diagram in which a voltage change at the end of the air battery, which is constantly observed by the control unit, and a drive signal are associated with each other.

FIG. 21 is a signal waveform diagram in which a voltage change at the end of the air battery, which is constantly observed by the control unit, and a drive signal are associated with each other.

FIG. 22 is a cross-sectional view of a body case according to another embodiment.

FIG. 23 is a cross-sectional view of a body case according to another embodiment.

FIG. 24 is a cross-sectional view of a body case according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body case 11 Air battery 24 Back lid 24a Edge part 24b, 25e Convex part 24d, 25b Recessed part 25 Battery lid 25c Projection part 24e, 25f Groove part 26 Gap 27 Opening part 28, 28a-28c Packing R receiver

Claims (8)

[Claims] 1. A battery accommodating portion formed so that a button-type battery can be accommodated through an opening opening on the back side of the body case.
In a portable wireless device including a battery lid that fits with an edge portion of the main body case forming the opening and closes the opening, the battery lid is in a direction substantially parallel to a back surface of the main body case. A portable wireless device having a protruding portion, wherein a gap is formed between the protruding portion and the back surface facing the protruding portion. 2. The portable wireless device according to claim 1, wherein the gap is formed by reducing a case thickness at a portion of the main body case facing the protrusion. 3. A convex portion protruding toward the opening portion is formed on the edge portion, and a concave portion into which the convex portion can be fitted is formed on an outer periphery of the battery lid. Item 3. The portable wireless device according to Item 1 or 2. 4. The recessed portion that is recessed toward the main body case side is formed at the edge portion, and the protruding portion that can be fitted into the recessed portion is formed at the outer periphery of the battery lid. Alternatively, the portable wireless device described in 2. 5. The concave portion and the convex portion are formed along the entire circumference of the battery lid and the entire circumference of the edge portion, respectively, and a rubber is provided on one of the bottom portion of the concave portion and the top portion of the convex portion. 4. The portable wireless device according to claim 3, wherein a member is provided. 6. The convex portion and the concave portion are formed along the entire circumference of the battery lid and the entire circumference of the edge portion, respectively, and a rubber is provided on one of the top portion of the convex portion and the bottom portion of the concave portion. The portable wireless device according to claim 4, wherein a member is provided. 7. The portable wireless device according to claim 5, wherein a groove is formed along the top, and the rubber member is disposed in the groove. 8. A band for mounting the body case on an arm is provided, and a projecting direction of the projecting portion is within a range of 90 ° to an acute angle with respect to a band direction of the band. Item 8. The portable wireless device according to any one of Items 1 to 7.