JP4232065B2 - Electronics - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic device, and is suitable for application to, for example, a portable digital playback device capable of playing music data.
[0002]
[Prior art]
In recent years, as a portable digital playback device, a device using a semiconductor memory as music data storage means has been proposed, and music obtained by playing back music data from the semiconductor memory is enjoyed.
[0003]
[Problems to be solved by the invention]
By the way, in such a digital reproducing apparatus, further miniaturization is desired in order to improve portability.
[0004]
The present invention has been made in consideration of the above points, and intends to propose an electronic device that can be further miniaturized.
[0005]
[Means for Solving the Problems]
In order to solve this problem, in the present invention, Cylindrical shape Case case and case A predetermined part of the surface of Provided in Operating means When When the operation means is operated, a signal output element for engaging with the operation means and outputting an operation signal is disposed, and when the operation means is operated with the signal output element facing the operation means An element arrangement member provided in the housing case and a control element for performing predetermined control based on an operation signal output from the signal output element are arranged so as to engage with the housing, and the housing is arranged more than the element arrangement member. A circuit board provided in the housing case so that the element arrangement member is stacked on the center side of the case; It was made to provide.
[0006]
Therefore, the circuit board can be easily accommodated without impairing the shape of the housing case.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[0008]
(1) Usage of electronic music distribution service
In recent years, an electronic music distribution service called EMD (Electric Music Distribution) that distributes digital music content using a computer network based on the Internet has been proposed.
[0009]
As shown in FIG. 1, in this type of electronic music distribution service, digital music is sent from an EMD server 1 that supplies content to a personal computer (hereinafter referred to as a computer device) 3 in the home via the Internet 2. Content C1 is distributed.
[0010]
In the computer apparatus 3, the digital music content C1 distributed from the EMD server 1 is downloaded to an internal hard disk and played back in accordance with the user's operation, so that the user can enjoy music at any time.
[0011]
In such an electronic music distribution service, there is a purchase method called “purchase” in which the digital music content C1 downloaded from the EMD server 1 to the computer device 3 can be reproduced anytime and many times like a CD (Compact Disc). On the other hand, there is a new purchase method called “with playback restriction” in which a playback period and playback limit for the number of playbacks are provided as a service with a reduced charge setting.
[0012]
Accordingly, when the user purchases the digital music content C1 from the EMD server 1 with “reproduction restriction”, the purchased digital music content C1 can be reproduced by the computer device 3 within the reproducible period or the reproducible number of times. it can.
[0013]
The computer device 3 can be connected to a portable digital playback device 4 incorporating a nonvolatile semiconductor flash memory as a storage means via a USB (Universal Serial Bus) cable. C1 can be uploaded to the semiconductor flash memory of the digital reproducing device 4 as digital data.
[0014]
As a result, the user can reproduce the digital music content C1 with “reproduction restriction” not only by the computer apparatus 3 but also by the digital reproduction apparatus 4 within the reproducible period or the reproducible number of times, and thus high-quality music. Can be enjoyed easily through the headphones 5 even outdoors.
[0015]
In practice, as shown in FIG. 2 (A), the digital music content C1 with “reproduction restriction” downloaded from the EMD server 1 to the computer apparatus 3 is configured by integrating the header H1 and the music data D1. The header H1 stores various information related to playback restrictions such as the playback possible period, the number of playbacks possible, and the number of times of actual playback (hereinafter referred to as the actual number of playbacks).
[0016]
Next, as shown in FIG. 2B, the computer apparatus 3 uploads the digital music content C1 to the semiconductor flash memory of the digital reproduction apparatus 4 as digital data.
[0017]
The digital playback device 4 always plays back the music data D1 after reading the playback restriction information of the header H1 when executing playback processing according to the playback operation of the user, and is managed by the header H1. The reproduction restriction information is effectively used to prevent illegal reproduction processing.
[0018]
By the way, in the digital reproducing apparatus 4 in the present embodiment, the RTC circuit is not mounted and the reproducible period cannot be managed by the clock function as it is. Even when the reproduction restriction information of the header H1 is read out, It is conceivable that the digital music content C1 can be played indefinitely without determining whether or not it is within the playable period range.
[0019]
In order to prevent such a situation, the digital reproduction device 4 is within the range of “reproducible number of times (for example, 2 times)” defined by the reproduction restriction information of the header H1 even within the range of the reproducible period. Only the reproduction process is allowed, and when the “actual reproduction number” updated when the reproduction is actually reached the “reproducible number”, the reproduction process is restricted.
[0020]
However, as shown in FIG. 2C, the digital reproduction device 4 can only be reproduced twice in spite of being within the range of the reproducible period as it is, so it is connected to the computer device 3 again. Then, the current time information T1 is supplied from the RTC circuit 3A built in the computer device 3, and it is determined whether or not it is within the range of the reproducible period based on the time information T1, and the range of the reproducible period Is recognized, the “actual playback count” of the header H1 is rewritten to “0”.
[0021]
As a result, when the digital playback device 4 is within the playable period range, the digital playback device 4 repeatedly uses the restriction on the “number of playable times (for example, 2 times)” defined by the playback restriction information in the header H1 to perform the above-described playback processing. It can be executed even once.
[0022]
Further, when the digital reproduction device 4 recognizes that the reproducible period has ended based on the time information T1, it does not execute the reproduction process without rewriting the “number of reproductions” of the header H1 to “0”. .
[0023]
In this way, the digital reproduction device 4 repeats the reproduction process up to the “reproducible number of times” as described above and the reproducible period check by being connected to the computer device 3, so that it is within the reproducible period range. The reproduction process up to the “reproducible number of times (2 times)” can be repeated any number of times, and the reproduction process can be limited when the reproducible period ends.
[0024]
On the other hand, in the case of the digital music content C1 to which only the reproduction limit of the reproducible number of times is added, the digital reproduction device 4 executes the reproduction process within the reproducible number of times and reproduces the reproducible number of times. When this happens, the subsequent playback process is not executed.
[0025]
(2) Overall configuration of digital playback device
(2-1) Structure of digital playback device
As shown in FIG. 3, the digital playback device 4 has a housing case 10 having a substantially cylindrical shape, and various operation switches, operation buttons, and a display window 11 for a display unit are provided on a peripheral side surface of the housing case 10. Etc. are provided.
[0026]
Here, when the side on which the display window 11 of the digital reproduction device 4 is provided is the front, the respective peripheral side surfaces when the casing case 10 is rotated 45 degrees about the axis are shown in FIGS. ).
[0027]
As shown in FIG. 4A, on the left side surface of the housing case 10, an upper limit of the sound volume is fixed to one end side in the longitudinal direction of the housing case 10 (hereinafter referred to as the case longitudinal direction). The volume upper limit fixing switch 12 is slidably provided, and a plastic USB connector cover 13 is provided so as to open and close a hole (not shown) in which a USB (Universal Serial Bus) connector is accommodated.
[0028]
Actually, the USB connector cover 13 protects the USB connector by closing the hole when the USB connector is not used and is integrated with the housing case 10, and opening the hole when the USB connector is used. The USB connector can be connected to the computer apparatus 3 via a USB cable (not shown).
[0029]
Further, as shown in FIG. 4B, the volume up button 14, the volume down button 15, the fast forward button 16, the fast reverse button 17, the display window 11, and the display window 11 Shift buttons 18 are sequentially provided. Further, a play / stop button 19 through which a play command and a stop command can be input is provided on one end surface of the housing case 10.
[0030]
Then, on the front surface of the housing case 10, a display unit (not shown) provided at the lower part of the display window 11 performs display according to various operations, thereby presenting the display contents via the display window 11. It has been made so that it can.
[0031]
Incidentally, the shift button 18 functions as an operation button for switching the reproduction mode together with the fast-forward button 16 when the fast-forward button 16 is pressed in a state where it is pressed. The shift button 18 also functions as an operation button for switching the sound quality mode together with the fast reverse button 17 when the fast reverse button 17 is pressed while the shift button 18 is being pressed.
[0032]
Further, as shown in FIG. 4C, a hold switch 20 is slidably provided on one end side of the right side surface of the casing case 10, and the hold switch 20 is slid to one end side of the casing case 10, for example. By doing so, the input of various operation buttons is invalidated, and this state can be maintained.
[0033]
In addition to this, as shown in FIG. 4 (D), on the rear surface of the housing case 10, a dry cell storage unit 22 in which an AA size driving dry cell 21 can be loaded is provided on the other end side. A lid portion 23 for closing the storage portion 22 is detachably attached.
[0034]
Thereby, in the dry cell storage part 22, when the cover part 23 is removed, the driving dry battery 21 can be loaded inside, or the driving dry battery 21 can be taken out from the inside, and the driving dry battery 21 is loaded inside. When the lid 23 is attached in this state, the lid 23 can prevent and hold the driving dry battery 21 from falling off.
[0035]
In addition, on the rear surface of the housing case 10, a jack holding portion 25 that holds the headphone jack 24 on one end side, and a clip portion 26 for attaching the housing case 10 to a breast pocket of an outer jacket or the like are provided in the case longitudinal direction. And an annular strap fitting 27 is provided at a predetermined position that is adjacent to the jack holding portion 25 and the clip portion 26 and deviates from the center of gravity of the digital reproducing device 4.
[0036]
The strap metal fitting 27 is configured to be freely rotatable within a range of approximately 180 degrees from the posture in contact with the jack holding portion 25 to the posture in contact with the clip portion 26 with respect to the back surface of the housing case 10. By raising the strap fitting 27, various straps can be easily attached or detached.
[0037]
Here, in the digital playback device 4, unlike the recording / playback device having a mechanical recording / playback mechanism such as a hard disk drive or the like, as described above with reference to FIG. 1, the digital music content C1 is stored in the internal semiconductor flash memory. Is recorded and reproduced, so that the music data D1 of the digital music content C1 can be reproduced without causing skipping or the like even in an environment where vibration is applied.
[0038]
For this reason, as shown in FIG. 5, the digital playback device 4 normally obtains the music data D1 from the semiconductor flash memory by inserting the plug 29 provided on the headphone cord 28 into the headphone jack 24. Although the recorded music can be listened to through the headphones 5, it can be used in a state where it is hung from the neck by attaching a strap 31 for a neck strap to the strap fitting 27 at this time. ing.
[0039]
By the way, the digital reproducing apparatus 4 has a weight of about 25 [g] excluding the driving dry battery 21, and most of the various parts constituting the digital reproducing apparatus 4 are provided on one end side in the longitudinal direction of the case. Further, in the digital reproducing device 4, for example, the driving dry battery 21 having a weight of about 23 [g] is loaded in the dry battery storage unit 22 provided on the other end side in the longitudinal direction of the case. When loaded, the center of gravity is approximately the center in the longitudinal direction of the case.
[0040]
In the digital reproducing apparatus 4, as shown in FIG. 6, when the strap 31 for hanging around the neck is used and the strap 31 is hung from the neck, the attachment position of the strap fitting 27 serving as a fulcrum is along the longitudinal direction of the case rather than the center of gravity. Since the other end side of the housing case 10 is directed substantially vertically downward, the play / stop button 19 provided on one end surface of the housing case 10 is directed substantially vertically upward. It is designed to maintain a posture that faces you.
[0041]
Thus, in the digital playback device 4, when the user is hung from the neck, the user can easily operate the thumb by touching the playback / stop button 19 just by grasping the peripheral side surface of the housing case 10. Has been made.
[0042]
Incidentally, in the digital reproducing device 4, as is clear from FIG. 5, a predetermined cord holding portion 32 for holding the headphone cord 28 is provided on the neck strap 31 and the neck strap 31 is attached to the neck strap 31. When the headphone cord 28 is hung from the neck and used, it is possible to prevent the headphone cord 28 from being complicated.
[0043]
Further, in the digital reproducing apparatus 4, as shown in FIG. 7, the jack holding portion 25 is formed in a wedge shape, and the headphone jack 24 is configured so that the axis of the cylindrical plug insertion hole is inclined with respect to the longitudinal direction of the case. It is held by the jack holding unit 25.
[0044]
Therefore, in the digital reproducing device 4, the plug 29 can be inserted into the headphone jack 24 from the one end side of the housing case 10 while being inclined with respect to the longitudinal direction of the case, thereby connecting the plug 29 and the headphone cord 28. Thus, the operability of the playback / stop button 19 can be prevented from being impaired by the connection portion between the plug 29 and the headphone cord 28.
[0045]
In addition to this, in the digital reproducing device 4, as shown in FIG. 8, one end side of the plate-like clip portion 26 is pivotally supported by a support shaft (not shown) embedded in the jack holding portion 25, The other end side of the clip part 26 is rotated within a predetermined angle range with respect to the back surface of the housing case 10.
[0046]
Thus, in the digital reproduction device 4, the outer chest pocket 33 can be attached to the chest pocket 33 so as to be sandwiched between the rear surface of the housing case 10 and the clip portion 26 from the other end side.
[0047]
In the digital reproduction device 4, even when the digital reproduction device 4 is attached to the breast pocket 33 in this way, the posture in which the reproduction / stop button 19 is extended from the breast pocket 33 is maintained, and thus the operability of the reproduction / stop button 19 is impaired. It is made to be able to prevent it.
[0048]
Here, in the housing case 10, as shown in FIG. 9, a front side case 35 constituting one end of the front side to the other end, a back side case 36 constituting one end side of the back side, It is constructed from a lid portion 23 that constitutes the other end side and a button holding portion 37 that holds the play / stop button 19.
[0049]
The front side case 35, the back side case 36, the lid part 23, and the button holding part 37 are each formed of a synthetic resin obtained by mixing a PC (Polycarbonate) resin and an ABS (Acrylonitrile Butadiene Styrene) resin at a predetermined ratio. ing.
[0050]
And the front side case 35 forms the dry cell storage part 22 mentioned above about FIG.4 (D) in the other end side with the single member. The storage space formed between one end side of the front case 35 and the back case 36 includes a display protection member 40, a display 41, a sub circuit board 42, a main circuit board 43, The switch circuit board 44 is sequentially stacked and stored. Incidentally, the switch circuit board 44 is a flexible board on which the switch circuit elements 44A and 44B for the volume upper limit fixing switch 12 and the hold switch 20 are mounted, and is fixed inside the back side case 36.
[0051]
Actually, as shown in FIGS. 10A and 10B, the dry cell storage unit 22 has a cylindrical storage space having an inner diameter corresponding to the outer diameter of the driving dry cell 21, and is arranged in the longitudinal direction of the case. A negative electrode terminal 45 formed in a coil shape with a conductive metal wire is disposed at one end along the line, and is formed, for example, in a disk shape with a conductive metal material at the other end along the longitudinal direction of the case. A positive electrode terminal 46 is disposed.
[0052]
In this case, in the dry cell storage unit 22, one end of the negative electrode terminal 45 is directly electrically connected to the main circuit board 43, and the positive electrode terminal 46 is connected to the main circuit via a plate-like conductive plate 47 formed integrally therewith. It is electrically connected to the substrate 43.
[0053]
A groove 22A is formed on the bottom of the dry cell storage part 22 from one end to the other end in the longitudinal direction of the case, and a conduction plate 47 is fitted into the groove 22A. At this time, the depth of the groove 22A is selected according to the thickness of the conductive plate 47 of about 0.2 [mm], thereby preventing the conductive plate 47 from protruding from the inner surface of the dry cell storage unit 22 into the storage space. It is made like that.
[0054]
Further, a sheet-like serial label 48 having a thickness of about 0.1 mm is attached to the bottom of the dry cell storage unit 22 so as to cover the conductor plate 47 from one end along the longitudinal direction of the case to the other end. It is worn.
[0055]
As shown in FIGS. 11A and 11B, the serial label 48 is made of, for example, an acrylic pressure-sensitive adhesive layer 49 having a relatively strong adhesive force, an aluminum layer 50, and PET (polyethylene terephthalate). The insulating printing resin layer 51 and the transparent film 52 are sequentially laminated, and the thickness of the aluminum layer 50 is appropriately selected, so that it has a certain degree of hardness and the serial label 48 itself is torn. It is made to be able to prevent such damage.
[0056]
Incidentally, in the serial label 48, a picture 53 indicating the loading direction of the driving dry battery 21 on one surface of the printing resin layer 51, and characters 54 and 2 indicating the individual serial numbers of the digital reproducing device 4 to which the serial label 48 is attached. A three-dimensional barcode 55 is printed, and a transparent film 52 is laminated on one surface of the printing resin layer 51 to protect the pattern 53, characters 54, and the like.
[0057]
Therefore, in the dry cell storage unit 22 (FIGS. 10A and 10B), the conductive plate 47 is lifted from the groove 22A due to the adhesive force and hardness of the serial label 48, and the peripheral side surface of the driving dry cell 21 is damaged. It is possible to prevent the peripheral side surface of the driving battery 21 and the conductive plate 47 from being insulated by the insulating property of the serial label 48.
[0058]
In the dry cell storage unit 22, the conductive plate 47 is thus fitted into the groove 22 </ b> A, and the insulation between the conductive plate 47 and the peripheral side surface of the driving dry cell 21 has a thickness of about 0.1 mm. By using the serial label 48 having the above, the inner diameter of the dry cell storage unit 22 can be selected to be approximately the same as the outer diameter of the driving dry cell 21 of about 14.5 [mm].
[0059]
Moreover, in the dry cell storage unit 22, the outer diameter of the dry cell storage unit 22 can be selected to be about 17 [mm] according to the inner diameter and the thickness by selecting the thickness so that the thickness can be protected from damage. Thus, the overall size can be reduced.
[0060]
On the other hand, as shown in FIG. 12, the display portion protection member 40 is made of a conductive metal plate that is bent at both ends in the width direction, and a switch element having a diaphragm configuration corresponding to the shift button 18 at one end of the flat portion 40A. 57, and switch elements 58 to 61 having diaphragm structures corresponding to the volume up button 14, the volume down button 15, the fast forward button 16, and the fast reverse button 17 are disposed at the other end of the plane portion 40A. .
[0061]
Further, in the flat surface portion 40A, an opening 40B corresponding to the display portion 41 is provided between the switch element 57 at one end and the switch elements 58 to 61 at the other end.
[0062]
In the display unit 41, as shown in FIG. 13, a U-shaped light guide plate 64 is laminated on an LCD (Liquid Crystal Display) 63, and an end portion in the width direction of the light guide plate 64 is a backlight (not shown). The entire rear surface of the LCD 63 can be illuminated almost uniformly through the light guide plate 64.
[0063]
In addition, the display unit 41 includes an anisotropic conductive member 65 in which a plurality of wires are penetrated at a predetermined pitch in an insulating sheet made of a resin material such as silicon rubber, and the length of the light guide plate 64 is defined in the longitudinal direction of each wire. By holding the anisotropic conductive member 65 between the arm portions 64A and 64B of the light guide plate 64 in substantially parallel to the direction, one end of each wire is electrically connected to the plurality of electrodes of the LCD 63. .
[0064]
As shown in FIG. 14A, the sub circuit board 42 has a trapezoidal shape with one end having a width of about 12.4 [mm] and the other end having a width of about 13.2 [mm]. Switch circuit element 67 for play / stop button 19 and IC package 6 constituting the LCD controller 8, Various surface mounted electronic components such as a circuit element group 69 constituting a digital-analog conversion circuit and an amplifier are mounted, and a plurality of backlight LEDs (Light Emitting Diodes) 70A to 70C corresponding to the light guide plate 64 are provided. Has been implemented.
[0065]
Also, a plurality of LCD lands 71 made of a conductor pattern are formed on one surface of the sub circuit board 42 so as to correspond to the respective electrodes of the LCD 63. When the LCD lands 71 are stored in the housing case 10, the LCD lands 71 are arranged. Are electrically connected to the corresponding electrodes of the LCD 63 through the wires of the anisotropic conductive member 65.
[0066]
Further, as shown in FIG. 14B, on the other surface of the sub circuit board 42, various surface mounted electronic components such as an IC package 72I constituting an EEPROM (Electrically Erasable Programmable Read-Only Memory) are mounted. Of a pair of connectors (hereinafter referred to as inter-board connection connectors) for directly connecting circuit boards to a predetermined portion, for example, a male inter-board connection connector 73 is mounted.
[0067]
Incidentally, on the other surface of the sub-circuit board 42, for a switch electrically connected to each switch element 57 to 61 provided on the display unit protection member 40 via a flexible board (not shown) by a conductor pattern. Lands 74A and 74B are formed, and a circuit board land 75 electrically connected to the switch circuit board 44 is formed.
[0068]
As shown in FIG. 15A, the main circuit board 43 has a rectangular shape having a width of about 17.2 [mm], and an IC package 77I and a CPU (Central Processing) constituting the flash memory controller on one surface thereof. Various surface mount electronic components such as an IC (Integrated Circuit) package 78I constituting a unit and an IC package 79I constituting a USB controller are mounted, and a male-type board-to-board connector 73 (FIG. 14B) ), A female inter-board connector 80 is mounted at a predetermined portion.
[0069]
As shown in FIG. 15B, on the other side of the main circuit board 43, an IC package 81I constituting a semiconductor flash memory, an IC package 82I constituting a DSP (Digital Signal Processor), a USB connector 83, a power supply circuit Various surface-mount type electronic components such as the circuit element group 84 constituting the circuit board are mounted. Incidentally, the negative electrode terminal 45 and the conduction plate 47 of the dry cell storage unit 22 are electrically connected to the circuit element group 84 constituting the power supply circuit.
[0070]
As shown in FIGS. 16A and 16B, in the main circuit board 43 and the sub circuit board 42, a male board is connected to the female board-to-board connector 80 in a state in which they are substantially parallel to each other. An intermediate connection connector 73 is inserted so that it can be directly connected mechanically and electrically.
[0071]
Incidentally, a bus is formed by a conductor pattern on the main circuit board 43, and various digital surface-mounted electronic components connected to the bus are mounted, and an analog system is mounted on the sub circuit board 42. Various surface mount type electronic components are mounted so that the various surface mount type electronic components of the sub circuit board 42 are not affected by the noise generated by the operation of the various surface mount type electronic components of the main circuit board 43. Yes.
[0072]
Further, the surface-mounted electronic components are mounted on one surface of the main circuit board 43 and the other facing surface of the sub circuit board 42 so as not to face each other. The main circuit board 43 and the sub circuit board 42 can be brought close to the thickness of the surface mount electronic component.
[0073]
By the way, in the main circuit board 43 (FIG. 15A), after the female-type board-to-board connector 80 is positioned together with various surface-mounted electronic components on one surface via solder, for example, a reflow furnace The board-to-board connector 80 is soldered due to an error in the amount of solder applied to one surface, a positioning error of the board-to-board connector 80, or the like. In some cases, it is mounted in a state of being rotated in parallel with one surface of the main circuit board 43 at the time of melting.
[0074]
Similarly, in the sub circuit board 42 (FIG. 14B), after the male inter-board connector 73 is positioned through the solder together with various surface mount electronic components on the other surface, the reflow furnace is installed. The board-to-board connector 73 is melted due to an error in the amount of solder applied to the other surface, a positioning error of the board-to-board connector 73, or the like. Sometimes, it is mounted in a state of being rotated parallel to the other surface of the sub circuit board 42.
[0075]
For this reason, the sub circuit board 42 (FIG. 16B), when connected to the main circuit board 43, is parallel to the main circuit board 43 around the mounting position of the inter-board connection connector 73, and is at most 5 It may be connected in a rotated state.
[0076]
A board-to-board connector 80 is mounted on one surface of the main circuit board 43 at a predetermined part on the other end side, and the board-to-board connection is also provided on the other surface of the sub circuit board 42 at a predetermined part on the other end side. When the sub-circuit board 42 is connected in a state of being rotated in parallel with one surface of the main circuit board 43 by mounting the connector 73 for the main circuit board 43, the length of the main circuit board 43 is set at one end side of the sub-circuit board 42. The shake amount with respect to the direction becomes the largest.
[0077]
However, the sub circuit board 42 is formed in a trapezoidal shape in which the width of one end is narrower than the width of the other end, so that both side faces of the sub circuit board 42 correspond to the corresponding side faces of the main circuit board 43. It is connected to the main circuit board 43 so as to fall within an angle range until it becomes almost parallel, and thus can be easily stored in the arc-shaped storage space inside the front case 35 even when connected to the main circuit board 43. It is made like that.
[0078]
Actually, in the front case 35 (FIG. 9), a positioning pin 86 for positioning the display unit protection member 40 is provided at a predetermined position on the bottom on one end side. Further, around the display window 11, L-shaped support pillars 87 </ b> A to 87 </ b> D corresponding to the four corners of the display unit 41 are provided, and a plate-like member 88 corresponding to the anisotropic conductive member 65 of the display unit 41. Is provided.
[0079]
In addition to this, in the display part protection member 40 (FIG. 12), a hole 40C corresponding to the positioning pin 86 of the front case 35 is formed in the substantially central part of the flat part 40A, and the opening part. Holes 40D to 40H corresponding to the columns 87A to 87D and the plate-like member 88 of the front case 35 are formed around 40B.
[0080]
Accordingly, in the front side case 35, as shown in FIG. 17, on one end side, the support columns 87A to 87D and the plate-like member 88 are passed through the corresponding holes 40D to 40H of the display unit protection member 40 and positioned. The display portion protection member 40 is positioned so as not to move in the longitudinal direction of the case by penetrating the corresponding pin 86 through the corresponding hole portion 40C, and thus the display portion protection member 40 is opposed to the opening portion 40B and the display window 11. It can be installed in the state that it is.
[0081]
In the front case 35, as shown in FIG. 18, the LCD 63 is held facing the opening 40B by fitting the four corners of the display unit 41 to the corresponding columns 87A to 87D. Further, the plate-like member 88 is brought close to the anisotropic conductive member 65 so that it can be prevented from falling off between the arm portions 64A and 64B of the light guide plate 65.
[0082]
In the front case 35, as shown in FIG. 19, the main circuit board 43 and the sub circuit board 42 connected via the pair of inter-board connectors 80 and 73 are displayed as one surface of the sub circuit board 42. The part protection member 40 (FIG. 18) is stored so as to face the flat part 40A.
[0083]
Next, as shown in FIG. 20, the rear case 36 is attached to the front case 35. In this state, the main circuit board 43 (FIG. 19) is fixed together with the rear case 36 by fixing screws 89A and 89B. The
[0084]
By the way, as the inter-board connectors 80 and 73 mounted on the main circuit board 43 and the sub circuit board 42, small ones having a relatively small outer shape and a relatively low height are selected.
[0085]
Therefore, the board-to-board connectors 80 and 73 can reduce the mounting area to prevent the main circuit board 43 and the sub circuit board 42 from becoming large, and the main circuit board 43 and the sub circuit boards 42 can be connected to each other. The storage space in the housing case 10 can be reduced as close as possible.
[0086]
However, in the board-to-board connectors 80 and 73, the connector pins provided in the board-to-board connectors 80 and 73 are fine because of the miniaturization, and the elasticity of the connector pins themselves is reduced. It becomes much smaller.
[0087]
Therefore, in the board-to-board connectors 80 and 73, when the main circuit board 43 and the sub circuit board 42 are housed in the housing case 10, the sub circuit board 42 is parallel to one surface of the main circuit board 43. If an addition is added in the rotating direction, it is considered that a connection failure occurs between the corresponding connector pins of the inter-board connection connectors 80 and 73.
[0088]
Accordingly, as shown in FIG. 21, even if the sub circuit board 42 is housed while being rotated in parallel with one surface of the main circuit board 43 (FIG. 19) fixed to the front case 35, the front case 35 Is formed in a trapezoidal shape with the width of one end and the other end selected so as to allow the rotation thereof, and is not particularly fixed to the front side case 35.
[0089]
Thus, in the digital reproduction device 4, even when the sub circuit board 42 housed together with the main circuit board 43 is rotating in parallel with one surface of the main circuit board 43, the board-to-board connectors 80 and 73 are connected. It is possible to prevent poor connection between corresponding connector pins.
[0090]
Further, in the digital reproducing device 4, if an external force is applied to the sub circuit board 42 in a direction rotating in parallel with one surface of the main circuit board 43, an impact due to dropping or the like is applied to the digital reproducing device 4. Although it is conceivable that the board-to-board connectors 80 and 73 are peeled off from the circuit board 43 and the sub-circuit board 42, the sub-circuit board 42 is not particularly fixed, so that the board-to-board connectors 80 and 73 The occurrence of peeling can also be prevented.
[0091]
Incidentally, in the front side case 35, movement restricting projections 90 </ b> A to 90 </ b> D are respectively provided on one end side and the other end side of the inner side surface, and movement restriction is provided on one end side and the other end side of both side surfaces of the sub circuit board 42. Notch portions 91A to 91D are provided which correspond to the projection portions 90A to 90D and are wider than the movement restricting projection portions 90A to 90D.
[0092]
The sub circuit board 42 engages at least the notches 91A and 91D on the other end side with the corresponding movement restricting protrusions 90A and 90D in accordance with the rotation angle with respect to the main circuit board 43, so that the inside of the front case 35 Thus, it is restricted from moving in the longitudinal direction of the case.
[0093]
Further, in the sub circuit board 42 (FIG. 14A), the LCD lands 71 are formed to have a predetermined length along the width direction of the sub circuit board 42, respectively. Thus, even when the sub circuit board 42 is housed in a state of being rotated in parallel with the main circuit board 43, the wire of the anisotropic conductive member 65 can be reliably electrically connected to the LCD land 71. Has been made.
[0094]
The housing case 10 is formed based on a cylindrical shape having an outer diameter of about 17 [mm], but the main circuit board 43 (FIGS. 15A and 15B) has a flash memory controller. Since the IC package 77I constituting the CPU and the IC package 78I constituting the CPU are each formed into a square having sides of about 16 [mm], a rectangle having a width of about 17.2 [mm] accordingly. It is formed in a shape.
[0095]
Therefore, as shown in FIG. 22, L-shaped ribs 35 </ b> A and 35 </ b> B and 36 </ b> A and 36 </ b> B protrude outside along the longitudinal direction of the case at the joint portion of the front case 35 and the back case 36. Is provided.
[0096]
The front side case 35 is fitted to the fitting portions 35AX and 35BX which are substantially parallel to the left and right side surfaces of the ribs 35A and 35B, and the ribs 36A and 36B corresponding to the rear side case 36 are substantially parallel to the left and right side surfaces, respectively. The joint portions 36AX and 36BX are fitted.
[0097]
As a result, in the housing case 10, the inside of the U-shaped projecting portion composed of one of the fitted ribs 35 </ b> A and 36 </ b> A extends from the inside of the U-shaped projecting portion composed of the other rib 35 </ b> B and 36 </ b> B. The main circuit board 43 is accommodated, and thus the main circuit board together with the display unit protection member 40, the display unit 41, the sub circuit board 42, and the switch circuit board 44 without substantially damaging the substantially cylindrical shape of the casing case 10. 43 can be easily stored.
[0098]
Further, in the case 10, the corresponding ribs 35A and 35B of the front case 35 and the back case 36 and the fitting portions 35AX and 35BX and 36AX and 36BX between 36A and 36B are fitted so as to overlap each other. Thus, the corresponding ribs 35A and 35B and 36A and 36B can be integrated with each other, and thus the rigidity of the housing case 10 can be improved.
[0099]
By the way, on the other surface of the main circuit board 43 (FIG. 15B), a conductor pattern for ground (hereinafter referred to as a ground pattern) is formed at both ends in the width direction from one end to the other end in the longitudinal direction. 92) is formed, and the ground patterns 92 at both ends are arranged close to the corresponding pair of ribs 35A and 36A and 35B and 36B, respectively.
[0100]
As a result, as shown in FIG. 23, when the casing case 10 is brought close to a charged metal member or the like, static electricity is internally introduced from the outside through the gaps between the ribs 35A and 35B and 36A and 36B. Even if it jumps in, the static electricity can be taken straight through the relatively large ground patterns 92 at both ends of the main circuit board 43, and the internal surface mount electronic components can be damaged by the high static voltage. It has been made to be able to prevent.
[0101]
Moreover, in the display part protection member 40 (FIG. 12), it consists of an electroconductive metal plate as mentioned above, and the protrusion parts 40K and 40L are provided in the one end side and other end side of both the leg parts 40I and 40J, respectively. Yes.
[0102]
In addition, a ground pattern 94 is formed on one end of the sub circuit board 42 (FIG. 14A) at both ends in the width direction so as to correspond to the protrusions 40K and 40L of the display unit protection member 40. Yes.
[0103]
As shown in FIGS. 24 and 25, in the display unit protection member 40, when housed in the housing case 10, the display portion protection member 40 is positioned by the positioning pins 86 in the front side case 35, and the sub circuit board. 42 is accommodated with its movement restricted in the longitudinal direction of the case, so that the protrusions 40K and 40L provided on the legs 40I and 40J are electrically connected to the corresponding ground pattern 94 of the sub circuit board 42. It is made to let you.
[0104]
As a result, when the housing case 10 is brought close to a charged metal member or the like, the gap 95A between the front case 35 and the display window 11 from the outside, the volume up button 14, the volume down button 15, and the fast forward Even if static electricity jumps into the inside through a gap 95B between the button 16, the fast reverse button 17 and the shift button 18 and the hole formed in the front side case 35 to hold them, the static electricity It can be taken into the display portion protection member 40 adjacent to these gaps and passed through the ground pattern 94 of the sub circuit board 42, and thus the LCD 63 and the switch elements 57 to 61 can be prevented from being damaged by a high static voltage. Has been made.
[0105]
In addition to this, in the display portion protection member 40, the switch elements 57 to 61 provided on the flat surface portion 40A correspond to each other by being supported by the sub circuit board 42 and being formed of a metal plate. Even when pressed through the shift button 18, volume down button 15, volume up button 14, fast reverse button 17 and fast forward button 16, the front case is sufficiently rigid to withstand without deformation. The gap between the inner surface of 35 and the flat surface portion 40A can be effectively utilized as a storage space for the switch elements 57 to 61.
[0106]
Further, since the display portion protection member 40 is formed of the metal plate in this way, even when the thickness is selected to be relatively thin, the display portion protection member 40 has sufficient rigidity to cope with the pressing of the switch elements 57 to 61. Thus, the storage space occupied by the display unit protection member 40 inside the housing case 10 can be remarkably reduced.
[0107]
(2-2) Circuit configuration of digital reproduction device
Next, the circuit configuration of the digital reproducing device 4 will be described with reference to FIG. The digital reproduction device 4 is configured to drive the entire device by converting the power supply voltage supplied from the driving dry battery 21 into internal power of a predetermined voltage by the power supply circuit 102 and supplying it to the CPU 78 and various circuit blocks. Yes.
[0108]
When the digital playback device 4 is connected to the computer device 3 via the USB connector 83 via the USB cable 103, the digital music content C1 bulk-transferred from the computer device 3 is transferred via the internal bus 104 by the USB controller 79. It supplies to CPU78.
[0109]
Here, the digital music content C1 has a frame structure of 64 [Bytes] per packet, and is transferred from the computer apparatus 3 at a transfer rate of 12 [Mbit / sec].
[0110]
The digital music content C1 includes a header H1 and music data D1, as shown in FIG. 27. The header H1 includes “file ID”, “header size”, “content key (for encryption)”, “file size”. ”,“ Codec ID ”,“ File name ”, and“ File information ”are stored, and“ Reproduction restriction data ”,“ Reproduction start date ”, and“ Reproduction end date ”are included as reproduction restriction information necessary for the reproduction restriction process. , “Reproducible number of times” and “actual number of times of reproduction” are stored.
[0111]
Actually, in the header H1, as shown in FIG. 28 showing the stored information in hexadecimal notation, the “header size” represents the data length of the header H1 (33 bytes in this case). "Represents the data length of the file of the music data D1 (in this case, 3636138 bytes).
[0112]
The “content key” is encrypted data for decrypting the music data D1 (FIG. 27), and when the digital music content C1 is actually exchanged between the computer device 3 and the digital playback device 4. The data is further encrypted with a common session key.
[0113]
Actually, when the computer apparatus 3 and the digital reproduction apparatus 4 are connected, the digital reproduction apparatus 4 needs to be authenticated by the computer apparatus 3, and in this case, between the computer apparatus 3 and the digital reproduction apparatus 4, For example, challenge response authentication is performed. Incidentally, in the digital reproduction device 4, the DSP 82 is responsible for the decryption process when performing challenge-response authentication.
[0114]
Here, the challenge-response method responds to a value (challenge) generated by the computer device 3 with a value (response) generated by the digital playback device 4 using a secret key shared with the computer device 3. Since the challenge changes every time, even if the response is intercepted, there is no danger of being reused and the mutual authentication can be performed safely.
[0115]
The “codec ID” is an ID number corresponding to the decompression method when the digital playback device 4 plays back the music data D1 of the digital music content C1, and for the ID number “1”, it is ATRAC (Adaptive Transform Acoustic Coding). A decompression method corresponding to a data compression method called 3 is assigned, and an expansion method corresponding to a data compression method called MP3 (MPEG Audio Layer-3) is assigned to the ID number “0”.
[0116]
The “file name” is data obtained by converting, for example, the file name “ABCD.AC” of the digital music content C1 into an ASCII (American National Standard Code for Information Interchange) code, and the “file information” is the digital music content C1. This is data obtained by converting a song name, artist name, composer name, composer name, etc. into ASCII code.
[0117]
“Reproduction restriction data” is data indicating whether or not the reproduction limitation of the reproducible period or the reproducible number of times is added to the digital music content C1 reproduced by the digital reproduction apparatus 4, and when the reproducible number of times is limited. “1” is assigned only, and “2” is assigned only when the playable period is limited, and “0” is assigned when there is no playback restriction, that is, digital music content C1 purchased by “purchase”. Yes.
[0118]
The “reproduction start date” and “reproduction end date” are data indicating the range of the reproducible period when the “reproduction restriction data” is “2”, and “0640F” and “000000F” indicate “ “April 15, 2000” to “July 15, 2000” indicates the range of the reproducible period.
[0119]
Similarly, the “reproducible number of times” and “actual number of times of reproduction” are the maximum number of reproducible times specified in advance when “reproduction restriction data” is “1” and “2”, and the reproduction process is executed. Is the data indicating the actual number of reproductions updated by the CPU 78, and “02” and “01” data indicate that the “reproducible number of times” is “2” and the current “actual number of reproductions” is “1”. Indicates that the number of times.
[0120]
Therefore, according to the reproduction restriction information in the header H1, as described above with reference to FIG. 2, the digital reproduction apparatus 4 performs reproduction processing 2 if it is within the range of “April 15, 2000” to “July 15, 2000”. It can be executed over and over again.
[0121]
Incidentally, the header H1 of the digital music content C1 to which playback restriction is added only to the number of playbacks possible, for example, as shown in FIG. 29, “playback restriction data” indicates “1”, “playback start date” and “playback end”. “Day” is “000000” and “000000”, and “Number of reproducible times” and “Number of actual times of reproduction” are “0a” and “05”. That is, there is no restriction on the reproducible period by the “reproduction start date” and the “reproduction end date”, the “reproducible number” is “10” times, and the current “actual reproduction number” is “5” Show.
[0122]
By the way, in the digital reproduction device 4 (FIG. 26), a writing instruction for the digital music content C1 is transferred together with the digital music content C1 from the computer device 3, and the CPU 78 receives the writing instruction in a RAM (Random Access Memory) 105. Then, the digital music content C1 is written into the semiconductor flash memory 80 by controlling the flash memory controller 77 in accordance with the main program read from the ROM (Read-Only Memory) 106 to the RAM 105.
[0123]
Incidentally, the semiconductor flash memory 80 has a storage capacity of about 64 [MByte], and can store music for one CD (Compact Disc) album or more.
[0124]
The semiconductor flash memory 80 stores in advance a reproduction code for reproducing the music data D1 in a decompression method corresponding to the music data D1 that has been data-compressed in a predetermined compression method in the digital music content C1. .
[0125]
Accordingly, when a playback command corresponding to the user's pressing operation of the playback / stop button 19 is given to the CPU 78 via the operation key controller 107, the digital playback device 4 receives the playback code, the digital code from the semiconductor flash memory 80 by the CPU 78. The music data D1 of the music content C1 is read and transferred to the RAM (not shown) of the DSP 82.
[0126]
The DSP 82 detects and reproduces the music data D1 of the digital music content C1 by the CRC (Cyclic Redundancy Check) method based on the reproduction code transferred from the semiconductor flash memory 80, and reproduces it. To supply.
[0127]
Here, the DSP 82 is an IC package 82I (FIG. 15B) integrally formed with an oscillation circuit (not shown) provided therein, and a master clock MCLK from an oscillator 82A made of an externally attached crystal. The music data D1 is reproduced based on the master clock MCLK, the bit clock BCLK having a predetermined frequency generated by the internal oscillation circuit based on the master clock MCLK, the L channel clock LCLK for each frame, and the R channel clock. An operation clock composed of RCLK is sent to the digital-analog conversion circuit 108.
[0128]
In this case, the DSP 82 sends the above-mentioned operation clock to the digital-analog conversion circuit 108 according to the reproduction code when the music data D1 is being reproduced, but when the music data D1 is not being reproduced, the DSP 82 supplies the operation clock according to the reproduction code. By stopping the supply and not operating the digital-analog converter circuit 108, the power consumption of the entire digital reproducing apparatus 4 can be reduced.
[0129]
Similarly, oscillators 78A and 79A made of crystal are also externally attached to the CPU 78 and the USB controller 79, and predetermined processing is executed using the master clock MCLK supplied from the oscillators 78A and 79A. ing.
[0130]
This eliminates the need for a clock generation module for supplying a clock to each circuit block such as the CPU 78, DSP 82, USB controller 79, etc., thereby simplifying the circuit configuration and reducing the size of the digital reproduction apparatus 4. Can be planned.
[0131]
The digital-analog conversion circuit 108 converts the reproduced music data D1 into an analog audio signal and sends it to the amplifier 109. The amplifier 109 amplifies the audio signal to a predetermined level and then outputs the audio signal from the headphone jack 24 to the headphones 5, thereby providing the user with the music reproduced via the headphones 5.
[0132]
As described above, when the play / stop button 19 is pressed, the digital playback device 4 plays back the music data D1 of the digital music content C1 stored in the semiconductor flash memory 80 based on the control of the CPU 78 and the playback. When the playback / stop button 19 is pressed during the playback, the playback is stopped.
[0133]
Further, when the playback / stop button 19 is pressed again after the stop, the digital playback device 4 resumes the playback of the music data D1 from the stopped position based on the control of the CPU 78, and the playback / stop button 19 is pressed. When several seconds have passed without any operation after the reproduction is stopped, the power is automatically turned off to reduce power consumption.
[0134]
Incidentally, even if the playback / stop button 19 is pressed after the power is turned off, the digital playback device 4 does not play the music data D1 from the previously stopped position, but plays back from the first song. Become.
[0135]
In addition, the digital playback device 4 controls the LCD controller 68 by the CPU 78, so that the playback mode state, equalizer adjustment (sound quality mode), song number, playback time, playback, stop, fast forward, fast reverse processing state, volume, Various information such as the remaining battery level is displayed on the display unit 41.
[0136]
Furthermore, in the digital playback device 4, the number of songs of all digital music content C1 written in the semiconductor flash memory 80, the block position of the semiconductor flash memory 80 in which each digital music content C1 is stored, and various other types are stored in the EEPROM 72. A so-called FAT (File Allocation Table) such as memory storage information is stored.
[0137]
Incidentally, in this embodiment, 64 [KBByte] of the digital music content C1 is handled as one block, and the block position corresponding to one piece of digital music content C1 is included in the FAT.
[0138]
When the FAT is stored in the semiconductor flash memory 80 as shown in FIG. 30, for example, when the first music content C1 is written under the control of the CPU 78, the block position in the first music content C1 is set as FAT. When the next digital music content C1 of the second music is written, the block position in the digital music content C1 of the first music and the block position in the digital music content C1 of the second music are the same as the new FAT. It is rewritten to the area again.
[0139]
Thus, since the FAT is rewritten every time the digital music content C1 is written to the semiconductor flash memory 80, the CPU 78 can recognize the block position where the desired digital music content C1 is stored by reading the FAT.
[0140]
In addition, the FAT is configured so that the same data is written twice for reserve, and even if the driving battery 21 is removed during writing of the FAT, the data is protected by the FAT for reserve. Yes.
[0141]
However, although the semiconductor flash memory 80 is configured so that the stored digital music content C1 can be freely rewritten by the computer apparatus 3, the number of times of rewriting is defined at present.
[0142]
For this reason, when the FAT is stored in the semiconductor flash memory 80, the FAT is rewritten and double rewritten every time the digital music content C1 is stored. The number of rewrites of the content C1 is consumed.
[0143]
That is, if the CPU 78 is configured to store the FAT in the semiconductor flash memory 80, the number of rewriting of the FAT becomes enormous, the number of rewriting of the digital music content C1 decreases, and the prescribed number of rewriting cannot be satisfied.
[0144]
On the other hand, the EEPROM 72 is provided exclusively for storing FAT, and the CPU 78 adds the FAT of the stored digital music content C1 to the EEPROM 72 every time the digital music content C1 is stored in the semiconductor flash memory 80. It is not necessary to rewrite every time the digital music content C1 is stored.
[0145]
As described above, the CPU 78 does not store the FAT with a large number of rewrites in the semiconductor flash memory 80 together with the digital music content C1, but writes it in the EEPROM 72 separately from the digital music content C1, thereby defining the semiconductor flash memory 80. All the number of rewrites performed can be used effectively for rewriting the digital music content C1.
[0146]
In practice, the CPU 78 stores the digital music content C1 in the semiconductor flash memory 80, and writes the FAT having a large number of rewrites in the EEPROM 72, so that both the FAT and the digital music content C1 are stored in the semiconductor flash memory 80. Compared to the case of the above, the number of rewrites of the digital music content C1 to the semiconductor flash memory 80 can be increased several tens of times.
[0147]
Further, the CPU 78 is configured to write the FAT so as to be additionally written to the EEPROM 72, thereby reducing the number of times of rewriting the FAT as much as possible and preventing the EEPROM 72 from being unrewritable in a short period of time.
[0148]
By the way, when the digital playback device 4 is connected to the computer device 3 via the USB cable 103 (hereinafter referred to as USB connection), the digital playback device 4 is connected by USB based on an interrupt signal supplied from the USB controller 79 to the CPU 78. Recognize that.
[0149]
When the digital reproduction device 4 recognizes that the USB connection is established, it receives external power having a specified current value from the computer device 3 via the USB cable 103 and controls the power supply circuit 102 to drive the dry battery 21. The supply of internal power is stopped.
[0150]
At this time, the CPU 78 is supplied with external power from the computer apparatus 3 via the USB cable 103, and at the same time, stops the reproduction processing of the music data D1 by the DSP 82. As a result, the CPU 78 prevents the external power supplied from the computer device 3 from exceeding the specified current value, and performs control so that the external power having the specified current value is always received.
[0151]
As described above, when the USB connection is established, the CPU 78 uses the external power from the computer device 3 with a low power unit price by switching from the internal power supplied by the driving dry battery 21 to the external power supplied by the computer device 3. Thus, the power consumption of the driving dry battery 21 having a high power unit price can be reduced, and thus the life of the driving dry battery 21 can be extended.
[0152]
The CPU 78 can reduce radiation caused by the operation of the DSP 82 by stopping the reproduction processing of the music data D1 by the DSP 82 when external power is supplied from the computer device 3 via the USB cable 103. As a result, the overall radiation including the computer apparatus 3 can be further reduced.
[0153]
When the CPU 78 switches from the internal power supplied by the driving dry battery 21 to the external power supplied by the computer device 3, the CPU 78 stops the reproduction processing of the music data D1 by the DSP 82 and various operation buttons (volume upper limit fixed switch). 12, hold switch 20, volume up button 14, volume down button 15, play / stop button 19, fast forward button 16, fast reverse button 17, etc.) without executing various operations according to the operation of computer device 3. Since the digital music content C1 is written in the semiconductor flash memory 80 based on the control, even when various operation buttons are pressed during rewriting of the digital music content C1, the operation of the apparatus itself becomes unstable. Make sure to prevent digital music content It is configured so as to be able to protect the tree C1.
[0154]
At the same time, the CPU 78 can reliably receive external power from the computer device 3 at all times by switching from internal power supplied by the driving dry battery 21 to external power supplied by the computer device 3.
[0155]
As a result, the digital playback device 4 indicates that the processing is interrupted even if the driving dry battery 21 is removed or the battery runs out while the digital music content C1 is being written to the semiconductor flash memory 80 under the control of the computer device 3. The data writing process can be surely executed.
[0156]
At this time, the CPU 78 controls the LCD controller 68 based on the external power supplied from the computer apparatus 3 to display “PC” on the display unit 41, and is thereby connected to the computer apparatus 3 at present. Thus, the user is notified that operations using various operation buttons and switches cannot be executed.
[0157]
(3) Operation and effect of the present embodiment
In the above configuration, in the digital reproducing device 4, the joint portion between the front side case 35 and the back side case 36 constituting the casing case 10 formed in a substantially cylindrical shape according to the outer diameter of the driving dry battery 21 is provided. The corresponding ribs 35A and 35B and 36A and 36B are provided along the longitudinal direction of the case.
[0158]
In the digital reproduction device 4, when the rear case 36 is attached to the front case 35, the corresponding fitting portions 35AX and 36AX and 35BX and 36BX of the ribs 35A and 35B and 36A and 36B are fitted together. The right and left sides of the housing case 10 have storage spaces for storing the ends of the main circuit board 43 protruding from the cylindrical internal space of the housing case 10 integrally with the internal space. Protrusions were formed.
[0159]
Accordingly, in the digital reproduction device 4, although the main circuit board 43 is wider than the cylindrical outer diameter of the casing case 10, the main circuit board 43 is not damaged without damaging the substantially cylindrical shape of the casing case 10. Can be easily accommodated from one projecting portion to the other projecting portion, and thus the main circuit board 43 can prevent the entire casing case 10 from being enlarged.
[0160]
Further, in the digital reproducing device 4, since the ribs 35A and 35B and 36A and 36B are formed on the front case 35 and the back case 36, respectively, the rigidity of the front case 35 and the back case 36 can be improved. .
[0161]
In addition to this, in the digital reproducing device 4, when the rear case 36 is attached to the front case 35, the corresponding ribs 35A and 35B and the fitting portions 35AX and 35BX and 36AX and 36BX of 36A and 36B are overlapped. Since the corresponding ribs 35 </ b> A and 35 </ b> B and 36 </ b> A and 36 </ b> B are integrated with each other, the fitting portions 35 </ b> AX and 35 </ b> BX and 36 </ b> AX and 36 </ b> BX are formed on the left and right side surfaces of the housing case 10. These ribs are formed to face each other in the longitudinal direction of the case, and thus the rigidity of the housing case 10 can be improved.
[0162]
As a result, in the digital reproduction device 4, the casing case 10 can be reduced in thickness by the increase in the rigidity of the casing case 10, and thus the casing case 10 can be further reduced in size.
[0163]
By the way, as shown in FIG. 31, for example, a housing for storing a driving dry battery 21 having an outer diameter of about 14.5 [mm] and a main circuit board 43 having a width of about 17.2 [mm]. When the case 150 is formed in a cylindrical shape according to the width of the main circuit board 43, the outer diameter of about 19.2 [mm] is obtained even when the thickness of the case 150 is selected to be about 1 [mm]. It becomes.
[0164]
On the other hand, as is clear from FIG. 32, in the digital reproduction device 4 according to the present embodiment, the housing case 10 is formed according to the outer diameter of the driving dry battery 21, thereby The outer diameter of the casing case 10 is selected to be about 17 [mm] even if the thickness is selected so as to be protected from breakage and the clearance between the driving dry battery 21 and the casing case 10 is taken into consideration. be able to.
[0165]
In the digital reproducing device 4, if the projecting portion having a width of, for example, about 4.5 mm is formed on the housing case 10 by the ribs 35A and 35B and 36A and 36B, the main circuit board 43 can be easily formed inside. Thus, the housing case 150 formed in a cylindrical shape according to the width of the main circuit board 43 can be remarkably reduced in size.
[0166]
Incidentally, in the digital reproducing device 4, for example, the opposing protruding portion of the casing case 10 is painted in blue, and the cylindrical portion of the casing case 10 is painted in silver lighter than the protruding portion. Thus, the cylindrical portion can be emphasized, and the downsizing of the entire apparatus can be emphasized visually.
[0167]
According to the above configuration, the protruding portion having the storage space corresponding to the end portion in the width direction of the main circuit board 43 is provided on the peripheral side surface of the cylindrical housing case 10 so as to face each other in the longitudinal direction of the case. The main circuit board 43 is accommodated from the inside of the projecting portion to the inside of the other projecting portion, so that the cylindrical shape of the housing case 10 is less than the outer diameter of the cylindrical shape without impairing the cylindrical shape. A wide digital circuit board 43 can be easily accommodated, and thus a digital reproduction apparatus that can be further reduced in size can be realized.
[0168]
(4) Other embodiments
In the above-described embodiment, the case where the U-shaped protrusions are provided by the ribs 35A and 35B and 36A and 36B on the left and right side surfaces of the housing case 10 has been described. Not limited to this, as long as the main circuit board 43 can be accommodated, other protrusions having various shapes such as a protrusion having a mountain shape or a protrusion having a cross-section shaped like a water droplet and formed integrally with the housing case, etc. May be provided.
[0169]
Moreover, in the above-described embodiment, the case where the protrusions are provided on the left and right side surfaces of the casing case 10 has been described. However, the present invention is not limited to this, and the casing can be accommodated if the circuit board can be accommodated. The protrusions may be provided on only one predetermined side surface of the case 10, or two or more protrusions may be provided in various parts depending on the shape and number of circuit boards.
[0170]
Furthermore, in the above-described embodiment, the case where the main circuit board 43 described above with reference to FIGS. 15A and 15B is applied as the predetermined circuit board has been described, but the present invention is not limited to this. The present invention can be widely applied to circuit boards having various other shapes such as a disk-shaped circuit board and a trapezoidal circuit board similar to the sub circuit board 42.
[0171]
Furthermore, in the above-described embodiment, the case where the substantially cylindrical housing case 10 is applied as the housing case having a predetermined internal space has been described. You may make it use the housing | casing case which consists of other various shapes like a cylindrical thing, a box-shaped thing, etc. By the way, for example, when using a thin box-like case as the housing case, not only can the circuit board be accommodated by providing a protrusion along the longitudinal direction on one side and / or the other side thereof. The rigidity of the housing case can be improved.
[0172]
Furthermore, in the above-described embodiment, ribs are provided as internal space expansion means provided in the housing case and formed with a storage space for storing a portion of the circuit board protruding from the internal space so as to be integrated with the internal space. Although the case where the projection part formed by fitting 35A and 35B and 36A and 36B is applied is described, the present invention is not limited to this, and the circuit board is provided from the internal space and protrudes from the internal space. As long as a storage space for storing the part in an integrated manner with the internal space is formed, internal space expansion means having various shapes and configurations can be widely applied.
[0173]
Furthermore, in the above-described embodiment, the case where the electronic apparatus according to the present invention is applied to the digital reproduction device 4 described above with reference to FIG. 3 has been described. However, the present invention is not limited to this, and a disk-shaped recording medium, The present invention can be widely applied to various other electronic devices such as a recording and / or reproducing device using a tape-shaped recording medium, a recording and / or reproducing device in which a memory card is detachably loaded, a radio, and a portable terminal. it can.
[0174]
【The invention's effect】
As described above, according to the present invention, Cylindrical shape Case case and case A predetermined part of the surface of Provided in Operating means When When the operation means is operated, a signal output element for engaging with the operation means and outputting an operation signal is disposed, and when the operation means is operated with the signal output element facing the operation means An element arrangement member provided in the housing case and a control element for performing predetermined control based on an operation signal output from the signal output element are arranged so as to engage with the housing, and the housing is arranged more than the element arrangement member. A circuit board provided in the housing case so that the element arrangement member is stacked on the center side of the case; By providing the circuit board, it is possible to easily store the circuit board without impairing the shape of the housing case, and thus it is possible to realize an electronic device that can be further downsized.
[Brief description of the drawings]
FIG. 1 is a block diagram for explaining a usage form of digital music content.
FIG. 2 is a schematic diagram for explaining the restriction on reproduction of digital music content.
FIG. 3 is a schematic perspective view showing a configuration of a digital reproducing apparatus according to the present embodiment.
FIGS. 4A and 4B are a left side view, a front view, a right side view, and a rear view showing the configuration of the peripheral side surface of the digital playback device. FIGS.
FIG. 5 is a schematic diagram for explaining a digital reproduction apparatus to which a strap for hanging around a neck is attached.
FIG. 6 is a schematic diagram for explaining a digital reproducing apparatus that is hung from a neck using a strap for hanging around the neck.
FIG. 7 is a schematic perspective view for explaining the insertion of the plug into the headphone jack.
FIG. 8 is a schematic diagram for explaining a digital reproduction device attached to a breast pocket.
FIG. 9 is a schematic exploded perspective view showing the internal structure of the digital playback device.
FIG. 10 is a schematic cross-sectional view showing a configuration of a dry cell storage unit.
FIG. 11 is a schematic perspective view and a schematic exploded perspective view showing the configuration of a serial label.
FIG. 12 is a schematic perspective view illustrating a configuration of a display unit protection member.
FIG. 13 is a schematic perspective view showing a configuration of a display unit.
FIGS. 14A and 14B are a schematic diagram front view and a schematic rear view showing a configuration of a sub circuit board, respectively.
FIG. 15 is a schematic diagram front view and a schematic diagram rear view showing the configuration of the main circuit board;
FIG. 16 is a schematic side view and a schematic top view for explaining the connection between the sub circuit board and the main circuit board;
FIG. 17 is a schematic perspective view for explaining the attachment of the display unit protection member to the front case.
FIG. 18 is a schematic perspective view for explaining attachment of a display unit.
FIG. 19 is a schematic perspective view for explaining the storage of the main circuit board and the sub circuit board in the housing case.
FIG. 20 is a schematic perspective view for explaining the attachment of the rear case to the front case.
FIG. 21 is a schematic perspective view for explaining the storage of the sub circuit board in the front case.
FIG. 22 is a schematic side view for explaining the storage of the main circuit board in the housing case.
FIG. 23 is a schematic cross-sectional view with a part cut away for explaining the flow of static electricity to the main circuit board;
FIG. 24 is a schematic side view for explaining the assembly of the display unit protection member and the sub circuit board.
FIG. 25 is a schematic side view with a part cut away for explaining the flow of static electricity from the display unit protection member to the sub circuit board;
FIG. 26 is a block diagram illustrating a circuit configuration of a digital reproduction device.
FIG. 27 is a schematic diagram illustrating a data structure of digital music content.
FIG. 28 is a schematic diagram illustrating a data structure (1) of a header.
FIG. 29 is a schematic diagram illustrating a data structure (2) of a header.
FIG. 30 is a schematic diagram for explaining a data structure of a semiconductor flash memory when FAT is stored;
FIG. 31 is a schematic cross-sectional view for explaining a casing case formed according to the width of the main circuit board.
FIG. 32 is a schematic cross-sectional view for explaining a housing case formed according to the outer diameter of the driving dry battery.
[Explanation of symbols]
4. Digital reproduction device, 10 ... Housing case, 35 ... Front side case, 35A, 35B, 36A, 36B ... Rib, 35AX, 35BX, 36AX, 36BX ... Fitting part, 36 ... Back side Case, 43 …… Main circuit board.

Claims (6)

A cylindrical housing case;
Operating means provided on a predetermined portion of the surface of the housing case ;
When the operation means is operated, a signal output element for engaging with the operation means and outputting an operation signal is disposed, and the operation means is operated with the signal output element facing the operation means. An element arrangement member provided in the housing case so as to be sometimes engaged;
A control element that performs predetermined control based on the operation signal output from the signal output element is disposed, and the element disposition member is stacked at a position closer to the center of the housing case than the element disposition member. the housing a circuit board and Ru electronic device comprising a provided in the case so as. In the upper Kikatamitai case, the display means provided in contact with said element mounting member
The electronic device according to claim 1, comprising: The element arrangement member is provided with an opening corresponding to the display means,
The said display means was provided in the other surface side which becomes the back of one surface where the said signal output element of the said element arrangement | positioning member was arrange | positioned facing the said opening part of the said element arrangement | positioning member.
The electronic device according to 請 Motomeko 2. Other operating means provided on the end surface of the casing case ,
When the other operation means is operated, another signal output element for engaging with the other operation means and outputting an operation signal is arranged, and interposed between the element arrangement member and the circuit board. And other circuit boards provided in the housing case
The electronic device according to claim 3, comprising: A slide switch slidably provided on a predetermined portion on the other surface side of the element arrangement member with respect to the surface of the housing case;
When the slide switch is operated, a switch circuit element for engaging with the slide switch and outputting an operation signal is disposed, and the switch circuit element is opposed to the slide switch and the slide switch is operated. A switch circuit board provided in the housing case so as to be engaged sometimes
The electronic device according to claim 4 comprising: The element arrangement member is formed by bending both ends of the metal plate, and the signal output element is arranged on a flat plate portion between the bent both ends.
The electronic device according to 請 Motomeko 5.

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