KR890000103B1 - Wrist am radio receiver - Google Patents

Abstract

An AM radio-receiver suitable for being worn on a person's wrist, the receiver comprising a bracelet or strap, a bar antenna, an oscillation block containing an oscillating element serving as a reference oscillation source, the bar antenna and the oscillation block being disposed in the longitudinal direction of the bracelet or strap so that they are spaced from each other so as to reduce the influence of pulses generated by said oscillating element or associated pulses on the bar antenna, and at least one loudspeaker disposed in the space between the bar antenna and the oscillation block.

Description

Wrist AM radio receiver

1 to 5 show a wrist AM radio receiver according to a first embodiment of the present invention.

1 is a perspective view of the receiver.

2 is a side view of the receiver.

3 is a longitudinal cross-sectional view of the case portion.

4 is a cross sectional view of a case portion in the operating panel portion.

5 is a plan view of the operating portion.

6 to 8 illustrate a wrist AM radio receiver according to a second embodiment of the present invention.

6 is a perspective view of the receiver.

7 is a longitudinal sectional view of the main part.

8 is a longitudinal cross-sectional view of an interblock connection mechanism.

* Explanation of symbols for main parts of the drawings

1 bar retainer block 2 speaker retainer block

3: oscillation block 4: battery holding block

5: case 6: bottom

7: and 8: cover

9: and 10: flexible belt

11 holding devices 16, 20 and 22 printed circuit board

17: sound emission hole 19: operation panel

30: Display 31: Date adjustment button

32: Time adjustment button 33: Minute adjustment button

34: Second adjustment button 35 and 36: Auto channel selection button

37 to 40: frequency preset buttons 41 and 42: volume control buttons

43: memory button 44: alarm button

45: power switch button 46: mode switching button

The present invention relates to a wrist AM radio receiver composed of a wristband wound around the user's wrist.

In the conventional wrist AM radio receiver of the type wound around the wrist, in terms of size reduction, the bar antenna, the speaker, the printed circuit board carrying the circuit components, etc. are arranged in a single block, thereby increasing the thickness. The bar antenna was noisy because it was easily affected by circuit components. In particular, in a radio receiver using a phase closed loop (PLL) synthesizer or an electronic clock, a reference pulse is generated by using an oscillation element as a reference oscillation source, and the reference pulse or a frequency division pulse associated with it easily collides with the bar antenna. There was a power outage. Therefore, in such radio receivers using PLL synthesizers or electronic clocks, attempts have been made to reduce the same type of size as wrist radio receivers. In such a radio receiver, by completely shielding each component, the aforementioned disadvantages can be eliminated. However, in order to completely shield, it is necessary to use metal plates in multiple layers, or to process metal plates to shield them, which increases the time and labor required and complexity. In addition, since a large amount of metal plate is required, the production price is not good. As a result, it is difficult to reduce the size and the reception sensitivity is reduced by these metals.

The first object of the present invention is to provide an oscillation block comprising a rod antenna and an oscillation element serving as a reference oscillation source, so that the oscillation block is isolated from each other so as to minimize the influence on the pulse or the bar antenna generated in the oscillation element. At least the speaker is placed in the space between the bar antenna and the oscillation block, so that the bar antenna is less affected by the noise of the circuit components, so that it can receive high sensitivity, can be easily wound around the wrist, To provide a wrist AM radio receiver with a structure that reduces the thickness of the radio receiver and reduces its size so that it can be designed nicely at the same time.

A second object of the present invention is to provide a block having a bar antenna, a block having a speaker, a printed circuit board having a block and an oscillation element loaded therein, and the block having a connection hole to form an internal connection. Wrist AM radio, which is connected to the conductors passing through this connection hole, simplifies the wiring structure and the wiring operation in each block, and when the radio receiver is wound around the wrist, the conductors are not damaged by repeated bending operation. It is to provide a receiver.

A third object of the present invention is to increase reception sensitivity by using a PLL synthesizer in the wrist AM radio receiver and configuring the oscillation element to act as a reference oscillation element in the PLL circuit.

A fourth object of the present invention is to obtain a multi-function of the wrist AM radio receiver by equipping such a radio receiver with an electronic clock and configuring the reference oscillation source to generate a clock pulse within the electronic clock.

The fifth object of the present invention is to reduce the size of the wrist AM radio receiver by arranging a display portion for indicating the time of the electronic clock and the reception frequency of the radio receiver in a space between the bar antenna and the oscillation block in the winding direction together with the speaker. It is.

A sixth object of the present invention is to improve the mounting function of the wrist radio receiver by disposing the battery retaining block in the winding direction together with the speaker.

A seventh object of the present invention is to fit the wrist on the wrist of an AM radio receiver by placing a block having an antenna retaining block, a speaker retaining block, and a bottom portion having a printed circuit board bent along the outer circumferential surface of the wrist and equipped with oscillation elements. It is to improve.

An eighth object of the present invention is to provide a printed circuit board for mounting a bar antenna retaining block, a speaker retaining block, and an oscillation element and interconnecting the blocks by a pivoting device for pivoting and bending each block. It is to improve the fit on the wrist of the wrist AM radio receiver by providing a retaining block.

The ninth object of the present invention is to prevent the malfunction of the power switch in the wrist AM radio receiver by blocking the edge of the oscillation block at a right angle and mounting the power switch on a side perpendicular to the winding direction.

The tenth object of the present invention is to prevent the malfunction of the operation push button which is not frequently used by forming the V-shaped groove on the surface of the case and mounting the operation push button on the side formed by the V-shaped groove. Hereinafter, with reference to the accompanying drawings will be described in more detail the present invention. The first embodiment of the present invention will now be described with reference to FIGS. 1 to 5.

First, a PLL synthesizer is used as a local oscillator in a wrist AM radio receiver, for example, and with reference to FIGS. 1 and 2 where the radio receiver is equipped with an electronic clock, a rod antenna holding block 1 and a speaker holding A block 2, an oscillation block 3 and a battery retaining block 4 are mounted along the outer side of the bottom portion 6 and the bottom portion 6 formed in an arch form with each other in the arch direction of the case 5 formed integrally. Consists of covered lids 7 and 8. The cover 7 has a channel-shaped cross section as shown in FIG. 4 and extends over three blocks of the rod antenna retaining block 1, the speaker retaining block 2 and the oscillating block 3, and retains the machine. The structure is fixed to the bottom 6 by, for example, a mechanical screw. The cover 8 constituting the cover for opening and closing the battery retaining block 4 has a cross section in the form of a channel like the cover 7, and is formed at one end to open the battery retaining block 4. It is mounted to the bottom 6 so that it can be pivoted as shown by a point line in the second figure around the point 12. The pair of flexible belts (bands) 9 and 10 are pivotably mounted at both ends in the arch direction of the case 5 having the above-described structure. Reference numeral 11 denotes a retaining device attached to the tip of the belt 10 for engaging and disengaging with respect to the tip of the belt 9.

3 and 4, the rod antenna 13 is arranged in the rod antenna holding block 1, the ultra-flat speaker is arranged in the speaker holding block 2, and the speaker On the rear side of (14), a printed circuit board 16 on which circuit components 15 such as a tuning portion, an IF amplifier stage, and an output amplifier stage are mounted is mounted. The speaker arranged in the lid 7 has a number of sound emitting holes 17 on the front side. One end of the lid 7 constitutes an operation panel 19 in which a plurality of operation buttons, which will be described later, are arranged. In the operation retaining block 3 covered with the operation panel 19, a switch circuit board 20 and a printed circuit board 22 having a PLL and a circuit component 21 of the clock are selectively disposed by pressing the operation button. have. The oscillation element 21a formed on the printed circuit board 22 by a crystal that operates as a reference oscillation source in a PLL or clock circuit, etc., has an oscillation element 21a formed by a crystal acting as a reference oscillation source in a PLL or a clock circuit, or the like. ) Is also placed. In the battery holding block 4, a plurality of batteries 24, for example, mercury batteries, are arranged.

The electrical connections between the rod antenna retaining block 1, the speaker retaining block 2, the oscillation block 3 and the battery retaining block 4 are each small diameters formed between the blocks in the single case 5 having the above-described structure. It is obtained by a connecting member 28 such as a conductive wire inserted through the connecting holes 25, 26 and 27 of the.

Examples of a plurality of operation buttons disposed in the oscillation block 3 will be described with reference to FIGS. 3 to 5.

A part of the operation panel 19 is formed with a display portion 30 using a liquid crystal display unit, which can display the reception frequency and time of the radio receiver numerically. On the operation panel 19, the date adjustment button 31, the time adjustment button 32, the minute adjustment button 33, the second adjustment button 34, the automatic channel selection button (plus irradiation and minus irradiation 35 and 36), frequency preset buttons 37 to 40, volume control buttons (volume increase and volume attenuation) 41 and 42, memory button 43 for storing the preset frequency, alarm signal at any preset time An automatic button 44, a power switch button 45, and a mode switching button 46 for switching between the clock and the radio receiver are disposed while the radio receiver is in use, i.e. the radio receiver is wound around the wrist. In order to prevent the power switch button 45 from being turned on or off arbitrarily during easy operation, the power switch button 45 is operated while protruding on one side of the cover 8 portion of the battery retaining block 4. One of the panels (19) The notch portion formed at the corner is mounted on the 47. Since the memory button 43 and the automatic button 44 are not frequently used, as shown in FIG. 3, this button has an operating panel 19 and a cover. It is mounted obliquely in the V-shaped groove 48 formed between the 8. The buttons 31 to 45 are all pushbuttons.The printed circuit board disposed in the oscillation block 4 holding the operation button ( 20 and 22 and the printed circuit board 16 disposed in the speaker holding block 4 are covered with protective cases 50 and 51. The lid 7 is made of synthetic resin, and the bottom 6 is made of synthetic resin. It may be formed of a metal.

The wrist AM radio receiver is constructed as described above and used by winding the case 5 around the wrist via the belts 9 and 10. When acting as a radio receiver for receiving radio broadcasts, the power switch 45 is turned on, the mode switching button 46 is set to the radio mode, and then the autoselection buttons 35 and 36 or (37 to 37). The desired frequency preset button in 40 is pressed to receive the desired frequency. At this time, the received frequency is displayed numerically on the display portion 30. In this way, the receiving circuit in the radio receiver is operated so that the user can listen to the radio broadcast from the speaker. Volume control is performed by the volume control buttons 41 and 42. Therefore, the blocks 1, 2, and 3 each including the bar antenna 13, the speaker 14, and the printed circuit board 22 on which the oscillation element is loaded are separated from each other, and the bar antenna 13 is an oscillation element ( It is arranged on the opposite side of the oscillation element 21a in the oscillation block 3 having a space of the speaker holding block 2 so as to be far from 21a. As a result, the bar antenna 13 becomes difficult to receive the pulses generated by the oscillation element 21a and the pulses related thereto because the protective case covering the oscillation element 21a is not complete. As a result, the user can listen to radio broadcasts with very good sound quality.

When the radio receiver is used as a clock by setting the mode switching button 46 to the clock mode, the time is displayed numerically on the display portion 30.

In the embodiment described so far, the rod antenna retaining block 1, the speaker retaining block 2, the oscillating block 3 and the battery retaining block 4 are arranged in this order in the case 5, but such a block is Block 1, block 2, block 4 and block 3 may be arranged in this order. In addition to the blocks 1 to 4, several other blocks may be mounted if necessary.

A second embodiment of the present invention will now be described with reference to FIGS. 6 to 8.

Referring first to FIG. 6, there is shown a wrist AM radio receiver comprising a body case 101 and a bendable winding portion 102 for winding and holding the body case around the wrist. The body case 101 has a speaker 103 and a display portion 104.

The left portion of the winding portion 102 is composed of four winding units 105, 106, 107 and 108, wherein the unit 105 constitutes an oscillation block. In the next unit 106, a watch battery is included, and in the unit 107, an auxiliary circuit component is included. The last unit 108, which is configured longer than other units, is equipped with a battery for the radio receiver. The tip portion of the unit 108 is formed with a portion to be retained.

The right side of the winding portion 102 is composed of four winding units 109, 110, 111 and 112. In the unit 109 a bar antenna is included and the next two units are empty and simply act as part of the winding part. At the tip of the last unit 112 is formed a pair of retention pawls (not shown) suitable for engaging the portion to be retained of the winding unit 108.

In FIG. 7, the body case 101 is formed of a metal such as stainless steel or a hard alloy, for example, in the form of a flat longitudinal pipe, and a body case 101 having a circular opening 114 formed thereon. The internal structure of is shown. The ring 115 fits into the opening 114, and the small flat speaker 103 is held with the ring 115. The printed circuit board 116 is disposed in the body case 101 under the speaker 103, and circuit components are mounted thereon to constitute a receiving circuit of the radio receiver. Another small printed circuit board 117 is disposed below the printed circuit board 116. The bottom surface of the board is also equipped with circuit components that form part of the radio receiver circuit. Circuit components on the printed circuit boards 116 and 117 are shielded with protective cases 118 and 119, respectively.

The bottle-shaped hole 120 is formed in the upper part of the body case 101 at the side of the speaker 103, and the case 121 of the display portion fits in this hole. The bottom of the case 121 is covered with a protective plate 122, and inside the case 121, the transparent glass window plate 123, the number of stones 124, the polarizer 125, and the pair of liquid crystal glass 126 from above. And the liquid crystal base 127 are continuously arranged so that the frequency of the radio receiver and the time of the clock are displayed numerically.

The unit 109 of the winding portion 102 pivotably connected to the body case 101 via the pin 163 is formed of synthetic resin, as shown in FIG. A recess 128 is formed which is open downward, in which the rod antenna 129 is included. This recess 128 is covered with a lid 130. Circuit components mounted on the printed circuit boards 116 and 117 in the body case 101 and the bar antenna 129 constitute a super heterodyne receiving circuit.

The unit 105 of the winding portion 102 pivotably connected to the body case 101 via a pin 163 is formed of aluminum or stainless steel, which is an oscillating block, ie a radio receiver concentrated on the unit 105. And all the necessary operation buttons for the clock. These operation buttons are time calibration button 136, mode switching button 137 between real time and timer (alarm), lift-down sync button 138, memory channel button 139, auto-manual switching button 140 ), A volume control button 141 and a radio on-off button 142.

As shown in FIG. 7, the rubber plate 143 and the printed circuit board 144 are superposedly arranged in the grooved portion formed in the oscillating oscillation block 105. As shown in FIG. The rubber plate 143 is mixed with a piece of nickel which has a property that when pressed, part of it turns into an elastic conductor. On the upper surface of the printed circuit board 144, a pair of conductive patterns corresponding to the respective operation buttons arranged on the oscillation block are formed, and the patterns are covered with each other. Therefore, when the actuation button is pressed, the tip of the button locally presses the rubber plate 143, so that the pair of patterns corresponding to the button is short-circuited by the compressed conductive portion of the rubber plate to perform the switching action. On the bottom surface of the printed circuit board 144, an integrated circuit 146 and a oscillation element 162 for a clock are mounted.

The rectangular unit 108 constituting one end of the winding portion 102 is mounted with a water temperature battery for supplying power to the radio receiver in the body case 101.

As shown in FIG. 8, the units 105 to 112 constituting the winding portion 102 are connected to each other via the connecting member 150 in the form of a flat spherical sleeve. The connecting member 150 is formed of synthetic resin, and both ends thereof are fitted to the rectangular openings 151 formed at the ends of, for example, the units 105 to 106, respectively, so that the sidewalls of the openings 151 through the pins 152 are fitted. Since the parts are pivotably fixed, the units 105 and 106 and the connection member 150 can be pivoted with each other in a selected range. This pivoting angle is determined by joining the upper and lower outer peripheral edges of the opening 151 and the connecting member 150. Therefore, the pivoting angle can be changed by changing the margin value between the opening 151 and the connecting member 150. A through hole 153 extending in the longitudinal direction is formed in the connecting member 150, and the flexible printed circuit board 154 formed of a synthetic resin thin film is inserted into the through hole 153. The conductive pattern is formed on the printed circuit board 154, and the signal current and the supply current are supplied through the conductive pattern. Therefore, the electronic circuits and power supply batteries contained in the winding units 105 and 106 are electrically interconnected by the printed circuit board 154 forming the radio and clock circuits.

From now on, the operation of the radio receiver in the form of being wound around the wrist with the above-described structure will be described in detail. The radio receiver is used by wrapping it around the arm. Specifically, the body case 101 first covers the upper part of the arm wrist, and then the winding part 102 is bent and wound along the arm, and then a retaining foam formed at the tip of the unit 112 is wound around the winding part 102. And are inserted into the tip of unit 108 to retain and interconnect units 108 and 112, and the radio receiver hangs on the wrist.

The winding portion 102 for holding the radio receiver on the arm consists of a number of units 105 to 112, which are interconnected via a connecting member 150 as shown in FIG. 8. As it is connected, the winding portion 102 can be bent entirely, so that the arm skin or flesh is never pinched by adjacent units. In addition, the conducting wires for connecting the circuits with the components in the respective units 105 to 122 are constituted by the flexible printed circuit board 154, which has a through hole 153 formed in the connecting member 150. As it is inserted into the conductor, the conductor becomes invisible from the outside, so that the appearance is good and the failure of the conductor caused by damage of the conductor is reduced. In addition, the parts and circuits are suitably disposed between the units 105 to 112 and interconnected by the flexible printed circuit board 154, so that the body case 101 is not made large and the overall size of the radio receiver is made smaller. Can be.

Therefore, in order to receive the radio broadcast with the radio receiver wound on the arm, the radio receiver is turned on by pressing the radio on-off button 142 on the oscillation block configured by the unit 105 of the winding part 102, The volume is then adjusted by the volume button 141 and at the same time tuning is performed by the tuning button 138 for receiving the desired radio broadcast. In this case, the tuning frequency is displayed on the digital display portion 104 formed on the body case 101 so that the tuning operation is easily performed. As a result, when the radio receiver circuit is operated, the user can listen to the radio broadcast through the speaker in the body case 101 in the future.

Therefore, the operation of this radio receiver is achieved by the operation of the operation button disposed above the unit 105 constituting the oscillation block. On the other hand, since the unit 105 is disposed adjacent to the side surface of the body case 101, the arm on which the radio receiver is mounted is bent to the lower part of the chest, and the unit 105 is slightly inclined, It provides a state at the bottom that can be operated most easily. As a result, the operation of the operation button disposed on the oscillation block 105 can be made very easy. In addition, since all operation buttons of the radio receiver and the clock are concentrated on the unit 105, high operation performance is achieved.

In this radio receiver, the bar antenna 129 is disposed in the unit 109 on the side opposite to the oscillation block 105 with respect to the body case 101, and the unit 109 is formed of synthetic resin, so that radio waves It is not blocked by the case constituting the unit 109, and as a result, the sensitivity is improved. Incidentally, since the bar antenna 129 is not disposed in the body case 109, the case 101 may be formed of stainless steel or an ultra hard alloy, so that the radio receiver has a high efficiency and high mechanical strength, At the same time, the case 101 can be made smaller, which is preferable in terms of design.

In addition, since the oscillation block 105 itself is formed of metal, the clock circuit disposed in this block is shielded so that the bar antenna 129 does not receive noise from the clock circuit. In addition, the radio receiving circuit formed on the printed circuit boards 116 and 117 is shielded by the protective cases 118 and 119 and the metal body case 101, thereby preventing noise from being received, so that the user can have high quality through the speaker 103. The desired radio station can be listened to by voice. In addition, since the bar antenna 129 and the clock circuit 146 are disposed in the units 109 and 105, respectively, the body case 101 may be made smaller.

When a clock mounted in the radio receiver is used by operating the clock mode switching button 137, the time is displayed numerically on the display portion 104. Therefore, the display portion 104 is switched at the tuning display and the clock display perspective of the radio receiver, so that only one can be mounted, so that the size is reduced. In addition, since a plurality of operations of the clock are performed by the operation of the oscillation block disposed on the oscillation block 105, high operation execution can be made.

Claims (10)

An oscillation block 3,105 which can be wound and unwound around the wrist, and has rod antennas 13,129, oscillation elements 21a, 162 used as reference oscillation sources, oscillation blocks 3,105 and Speakers 14 and 103 disposed in a space between the rod antennas 13 and 129 of the bar antennas 13 and 129, and the oscillation blocks 3 and 105 are pulses generated by the oscillation elements 21a and 162 or the rods. Wrist AM radio receiver, characterized in that it is arranged in the winding direction of the radio receiver so as to be positioned with each other to minimize the influence of the associated pulses entering the antenna (13,129). 2. The block (1) according to claim 1, wherein the block (1) holds the bar antennas (13, 129), the block (2) holds the speakers (14, 103), and the block (3) on which the oscillation elements (21a, 162) are mounted. Wrist AM radio receiver, characterized in that the wire is passed through the connection holes (25, 26, 27) formed through the connection holes (25, 26, 27) and the conducting wires form an internal connection. The wrist AM radio receiver according to claim 1, wherein said radio receiver uses a PLL synthesizer and said oscillation elements (21a, 162) are used as reference reference sources in said PLL. The wrist AM radio receiver according to claim 1, wherein an oscillation element (21a, 162) having an electronic clock and used as a reference oscillation source is for generating a clock pulse in said electronic clock. 5. A display device as claimed in claim 4, having a display portion (104) for displaying the received frequency of the radio receiver and the time of the electronic clock, wherein said display portion (104) is said speaker (14,103) in the winding direction of the radio receiver. Wrist AM radio receiver, characterized in that arranged in the space between the antenna (13,129) and the oscillation block (3,105). 2. Wrist AM radio receiver according to claim 1, characterized in that the battery holding clock (4) is arranged together with said speaker (14,103) in the winding direction of the radio receiver. The printing device according to claim 1, wherein the block (1) holding the bar antennas (13, 129), the block (2) holding the speakers (14, 103), and the oscillating elements (21a, 162) are mounted. Wrist AM radio receiver, characterized in that a block (3) holding a circuit board (16, 22) is arranged on the bottom (6) bent along the outer circumferential surface of the wrist (60). 2. The printed circuit board according to claim 1, wherein the block (1) holding the bar antennas (13,129), the block (2) holding the speakers (14,103), and the printed circuit board on which the oscillation elements (21a, 162) are mounted. Wrist AM radio receiver, characterized in that the bricks (3, 16) holding (16,22) are individually arranged and connected to each other via a pivot device so that each can be pivoted and bent independently. 2. The power supply of claim 1, further comprising a power switch button 45 and an oscillation block 3, the corners of the oscillation block 3 being cut off at right angles to form a side perpendicular to the winding direction of the radio receiver. The power switch button 45 of the wrist AM radio receiver, characterized in that mounted on the side. The wrist AM radio receiver of claim 1, wherein a V-shaped groove is formed on the case surface of the radio receiver and an action push button is disposed on a side formed by the V-shaped groove.

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