JP2002334568A - Electronic equipment and method of protecting power source for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To protect the data recorded on a magnetic recording medium and to prevent the occurrence of a malfunction of equipment in attaching and detaching the magnetic recording medium in a recording medium storage section. SOLUTION: The electronic equipment has a first detecting means 33a for detecting that a cover attachably and detachably attached to a recording medium slot 9 is removed from the recording medium slot 9 and a second detecting means 33b for detecting that the recording medium is removed from the recording medium storage section. The supply of the electric power from a power source is interrupted when at least either of the first detecting means 33a or the second detecting means 33b detects the removal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device and a power supply protection method for the same, and more particularly, to the protection of data of a hard disk and the prevention of erroneous operation of the device when a hard disk as a magnetic recording medium is attached to and detached from a recording medium storage unit. Electronic device and its power supply protection method.

[0002]

2. Description of the Related Art Conventionally, it has become common to mount electronic equipment such as a navigation device in a vehicle. And
In a conventional navigation device, a CD (Compact Disc) is used as a recording medium for storing map data.
-ROM and DVD (Digital Video Di
sc or Digital VersertileDi
sc) -ROM or the like is used. Recently, these C
Instead of recording media such as D-ROM and DVD-ROM,
Attempts have been made to store map data using an inexpensive, large-capacity, and rewritable hard disk.

[0003]

By the way, the CD-
When a hard disk is used in place of a recording medium such as a ROM or a DVD-ROM, a large storage capacity makes it possible to easily update map data. Personal data etc. can also be stored.

[0004] Then, after a general user removes the decorative cover detachably provided in the disk insertion slot of the navigation device, then removes the hard disk and rewrites it with new map data, attaches the hard disk to the navigation device, Furthermore, in the case where the decorative cover is attached to the disc insertion slot, at present, no means for preventing erroneous operation is provided in the power supply circuit on the apparatus main body side.

For this reason, when the hard disk is attached to or detached from the navigation device, if the navigation device is energized, there is a concern that data recorded on the hard disk may be destroyed. There is a problem that there is a possibility that a malfunction of the device caused by energizing the navigation device in a state where the navigation device is not operated is possible.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and when attaching / detaching a magnetic recording medium to / from a recording medium storage section, protects data recorded on the magnetic recording medium and causes malfunction of equipment. It is an object of the present invention to provide an electronic device and a power supply protection method for the electronic device, which can prevent the occurrence of a failure.

[0007]

According to an aspect of the present invention, there is provided an electronic apparatus having a recording medium storage section for detachably storing a magnetic recording medium.
A cover detachably attached to a recording medium insertion slot in the recording medium storage unit, first detection means for detecting that the cover has been removed from the recording medium insertion slot, and the magnetic recording medium is a recording medium. Second detection means for detecting that the power supply has been removed from the storage unit, wherein when at least one of the first detection means and the second detection means detects the detection, the supply of power from a power supply is shut off. It is characterized by.

According to the first aspect of the present invention, the first detecting means for detecting that the cover detachably attached to the recording medium insertion slot has been removed from the recording medium insertion slot, and the magnetic recording medium And second detecting means for detecting that the recording medium has been removed from the recording medium storage unit, and when at least one of the first detecting means and the second detecting means detects the detection, supply of power from a power supply. When the magnetic recording medium is attached or detached, the data recorded on the magnetic recording medium can be protected, and malfunction of the device can be prevented beforehand.

Incidentally, when only the first detecting means is provided, even if the magnetic recording medium is not attached to the recording medium storage unit, the load is not supplied from the backup power supply only by attaching the cover to the recording medium insertion slot. Power is supplied to the load and the load is activated. On the other hand, when only the second detection unit is installed, the power is supplied from the backup power supply to the load even when the cover is removed. This is because there is an inconvenience.

According to a second aspect of the present invention, in the electronic device according to the first aspect, the first detecting means and the second
Wherein the detecting means is arranged in parallel with the recording medium insertion opening.

According to the second aspect of the present invention, the first detecting means and the second detecting means are arranged side by side in the recording medium insertion opening, so that the first detecting means and the second detecting means are provided. Installation of the means is facilitated.

According to a third aspect of the present invention, in the electronic device according to the first or second aspect, the first detecting means detects contact / separation of a convex portion formed on the cover and the second detecting means. The detecting means detects the contact or separation of the overhanging piece provided at the rear end of the magnetic recording medium.

According to the third aspect of the present invention, the first detecting means detects the contact and separation of the convex portion formed on the cover, and the second detecting means detects the rear end of the magnetic recording medium. By detecting the contact and separation of the overhanging pieces provided on the
And the detection accuracy of the second detection means can be improved. According to a fourth aspect of the present invention, a first detection is made that a cover detachably attached to a recording medium insertion port of a recording medium storage section for detachably storing a magnetic recording medium is removed from the recording medium insertion port. After detecting by the means, the second detecting means detects that the magnetic recording medium has been removed from the recording medium storage unit, and when at least the first detecting means detects, the supply of electric power from the power supply is performed. It is characterized by blocking.

According to the fourth aspect of the present invention, when at least the first detecting means detects the power, the power supply from the power supply is cut off, so that when the cover is removed from the recording medium insertion slot, the power supply is stopped. Cut off supply. Thereby, when the cover is removed, the power supply to the magnetic recording medium or the like is cut off, so that when the magnetic recording medium is attached or detached, the data recorded on the magnetic recording medium is protected, and It is possible to prevent a malfunction of the device from occurring.

[0015]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

The following description is an embodiment in which the electronic device according to the present invention is applied to an in-vehicle navigation device.

FIG. 1 is a perspective view showing a navigation apparatus to which an embodiment of an electronic apparatus according to the present invention is applied, FIG. 2 is a front view showing the navigation apparatus of FIG. 1, and FIG. 3A is a perspective view of the recording medium storage section viewed from the bottom side, and FIG. 3B is a perspective view showing a state where the recording medium storage section is inverted. 1 and 2 show a state in which a front cover that can be opened and closed attached to a front panel is removed.

As shown in FIG. 1, the housing 1 is formed in a rectangular box shape, and is housed and fixed in, for example, a concave portion of a dashboard of a vehicle. In the housing 1, a hard disk storage unit 2 as a storage medium storage unit and a miniaturized card type storage medium (not shown) called a memory card which is installed adjacent to the hard disk storage unit 2. A PC card storage unit 3 in which a PC card is stored, and a board / fan storage unit 4 installed at the rear of the hard disk storage unit 2 and the PC card storage unit 3 are mounted.

The hard disk storage unit 2 and the PC
At the top of the card storage unit 3, a CD-ROM or DVD-R
A ROM drive unit (not shown) for driving the OM or the like is mounted.

Note that a PC as the card-type recording medium is used.
The card can share information between the navigation device of the present embodiment and a personal computer in the home, or can share information between a plurality of electronic devices.

As shown in FIGS. 1 and 2, a front panel 5 is attached to the front surface of the housing 1 from which the front cover is removed, and a decorative cover 6 is attached to a lower left portion of the front panel 5. When the cover 6 is removed, a hard disk insertion port 9 for attaching and detaching two hard disks 7 and 8 as a magnetic recording medium is exposed, as shown in FIG. Have been. FIG. 2 shows a state in which the two hard disks 7 and 8 are not mounted.

The hard disk 7 shown in FIG. 1 stores data such as map data and personal music information, while the hard disk 8 stores data such as music information stored by an individual user. I have. And
The front panel 5 is attached in a state substantially perpendicular to the traveling direction of the vehicle.

As shown in FIG. 1, each of the hard disks 7 and 8 has sliding pieces 7a and 8a fixed on both sides thereof, and a plurality of pins 7b and 8b respectively connected to a connector to be described later at the insertion end. On the other hand, a projecting piece 7c projecting in the width direction is formed at the rear end of the insertion side of the hard disk 7 while being implanted. Tongues 7d, 8d made of an insulating and flexible plastic film are attached to the rear ends of the insertion sides of the hard disks 7, 8 for grasping with fingers when the hard disks 7, 8 are mounted or removed. Have been.

An openable card insertion slot 10 for inserting and removing a PC card (not shown) is provided in a lower right portion of the front surface of the front panel 5. The card insertion slot 10 is provided continuously with the PC card storage unit 3. An eject button 11 for taking out the inserted PC card is arranged near the card insertion slot 10.

Further, on the front upper part of the front panel 5, C
RO for inserting and removing D-ROM and DVD-ROM
An M insertion port 12 is provided with an opening.
2 is connected to a drive unit for driving the above-mentioned CD-ROM, DVD-ROM, or the like.
An eject button 13 for taking out a ROM or the like is provided.

The hard disk storage 2 is shown in FIG.
As shown in (B), a casing 15 is formed as a conductive case formed of a conductive metal such as stainless steel into a substantially U-shaped cross section.
And the side plate portions 1 bent on both sides of the top plate portion 16
7 and 17 are integrally formed.

A pair of rail members 18, 18 facing each other are fixed to the side plate portions 17, 17, and each of the rail members 18, 18 has two guide grooves vertically extending in the longitudinal direction. Sliding pieces 7a, 8a fixed on both sides of each of the hard disks 7, 8 are guided in these guide grooves 19, 20 to slide, so that the hard disks 7, 8 are formed. Casing 15
It is attached and detached. Therefore, the paired rail members 18,
The space formed by the top 18 and the top plate 16 constitutes a detachable passage 21 for the hard disk 7.

The upper wall of the guide groove 19 at the insertion end of the hard disk 7 is formed in an arc shape, and the upper wall of the guide groove 20 at the insertion end of the hard disk 8 is tapered. Each of the sliding pieces 7a, 8a of each of the hard disks 7, 8 can be easily inserted into the guide grooves 19, 20.

Further, the substrate 2 is provided at the rear of the casing 15.
2 are fixed, and two connectors 23, 23 are vertically fixed to the inner surface of the board 22. The connectors 23, 23 are each formed of a heat-resistant resin body 24 fixed to the board 21; And a cover 25 made of a heat-resistant resin and having a substantially M-shaped cross section, which is swingably attached to the body 24. When the hard disks 7, 8 are mounted in the guide grooves 19, 20, the cover 25, 25, the pins 7b and 8b of the hard disks 7 and 8 are inserted.

Next, the connector 23 will be described with reference to FIGS.
The structure of will be described in detail. 4 is a perspective view showing the connector of FIG. 3, FIG. 5 is an enlarged front view of FIG. 4, FIG. 6 is a sectional view taken along line AA of FIG. 5, and FIG. 7 is a side view of FIG.

As shown in FIGS. 4 to 7, the body 24 of the connector 23 is formed to have a substantially U-shaped cross section, and upright walls 24a are integrally formed on both side surfaces thereof. A slit 24b is formed. on the other hand,
The cover 25 of the connector 23 is formed to have a substantially M-shaped cross section, and a large number of openings 25a into which a large number of pins 7b or 8b are inserted are formed on an upper surface thereof, and projecting portions 25b are integrally formed at lower portions on both side surfaces. Have been. Each of the protrusions 25b is connected to each of the slits 2 of the body 24.
4b.

Further, inside the body 24 and the cover 25, a gold-plated copper alloy contact fitting 26 is mounted corresponding to the opening 25a of the cover 25, and one end of the contact fitting 26 is opened at the opening of the cover 25. The other end extends from the body 24 and is fixed to the substrate 21 by soldering. This allows
When the pins 7b, 8b of the hard disks 7, 8 are inserted into the openings 25a of the cover 25, the pins 7b or 8b are electrically connected to the substrate 21 through the contact fittings 26.

Further, the cover 25 is attached to the body 24.
Is mounted with a slight gap 27, and the body 24
And the cover 25, the projections 25a of the cover 25 are fitted into the slits 24b of the body 24 as described above,
In addition, by interposing a large number of contact fittings 26, it is structurally integrated, and the cover 25 is configured to be swingable with respect to the body 24 as shown by an arrow in FIG.

On the other hand, near the hard disk insertion slot 9 in the top plate 16 of the casing 15, FIG.
As shown in FIG. 2B, a substantially U-shaped notch 30 is formed, and a contact claw 31 as a ground contact member protrudes downward from the top plate 16 and is integrally formed in the notch 30. ing. Therefore, when the hard disk 7 is inserted into the guide groove 19 as shown in FIG.
Before the contact claws 31 come into contact with the upper surface of the hard disk 7 and the pins 7b of the hard disk 7 are inserted into the openings 25a of the cover 25, the static electricity charged on the hard disk 7 flows to the housing 1 through the casing 15 to ground. I have.

On the other hand, as shown in FIG. 2, two switches 33a (first detection means) and 33b (second detection means) are provided in the opening of the hard disk insertion slot 9 for attaching and detaching the hard disks 7, 8 as shown in FIG. As shown in FIG. 9, these switches 33a and 33b have main bodies 34a and 34b, respectively, and operating pins 35a and 35b that can be protruded and retracted from the main bodies 34a and 34b, respectively. When the main body 35a and the main body 35b are pressed,
a, 34b while being turned on, the pressing thereof is released, and the operating pins 35a, 34b are respectively released from the main bodies 34a, 34b.
It is configured to be turned off when 35b projects.

The switch (first detecting means) 33
As shown in FIG. 9, when the decorative cover 6 is attached to the hard disk insertion slot 9 as shown in FIG. 9, the convex portion 6a formed on the back surface of the decorative cover 6 presses the operating pin 35a and sinks into the main body 34a. The operating pin 35a projects from the main body 34a and is turned off when the decorative cover 6 is removed.

The switch (second detecting means) 33b
When the hard disk 7 is mounted in the guide groove 19 and the pin 7b of the hard disk 7 is inserted into the opening 25a of the cover 25 of the connector 23, the operating pin is provided by the overhanging piece 7c provided at the rear end of the hard disk 7 on the insertion side. 3
5b is pressed and immersed in the main body 34b and turned on,
When the hard disk 7 is pulled out from the guide groove 19 and the overhanging piece 7c is separated from the switch 33b, the operating pin 35b is set to protrude from the main body 34b and be turned off.

Therefore, as shown in FIG. 9, the switch 33a detects the contact or separation of the convex portion 6a formed on the decorative cover 6, while the switch 33b operates on the overhanging piece 7c provided at the rear end of the hard disk 7. It detects contact and separation.

FIG. 10 shows a switch 33 according to this embodiment.
It is a circuit diagram which shows the power supply protection circuit to which a and 33b were connected.

As shown in FIG. 10, the switches 33a, 33
3b is a load 36 such as the various drive units described above.
To the main switch 3
7 and connected to a backup power supply 38.

Therefore, the power supply protection circuit shown in FIG.
If any one of the switches 33b is off, the power from the backup power supply 38 is not supplied to the load 36, and the load 36 does not operate. That is, the switches 33a, 3
If both of the switches 3b are not turned on, the power from the backup power supply 38 is not supplied to the load 36, and the load 36 does not operate.

Next, the operation of the navigation device to which the electronic equipment according to the present invention is applied will be described.

Map data in a navigation device often needs to be rewritten in order to be updated. At this time, the user removes the makeup cover 6 and pulls out the hard disk 7 stored in the hard disk storage 2 from the hard disk insertion slot 9 by grasping the tongue 7d and rewrites and updates the map data.

Here, when the decorative cover 6 is removed,
The operation pin 35a of the switch 33a projects from the main body 34a, and the switch 33a is turned off.

When the hard disk 7 is pulled out from the hard disk insertion slot 9 as described above, the projecting piece 7c provided at the rear end of the hard disk 7 on the insertion side is separated from the switch 33b, and the operating pin 35b projects from the main body 34b. Switch 33b is turned off.

Next, the updated hard disk 7
Is inserted into the hard disk storage section 2 through the hard disk insertion slot 9 by grasping the tongue piece 7d. Then, the sliding piece 7a of the hard disk 7 is
Since the upper surface of the hard disk 7 slides while being in contact with the contact claws 31 while being guided by the guide grooves 19 of 8 and 18, even if the static electricity accumulated in the human body is charged on the hard disk 7, the static electricity charged on the hard disk 7 is Flows into the housing 1 through the casing 15 before the pins 7b of the hard disk 7 are inserted into the openings 25a of the cover 25,
Further, the casing 1 is grounded to the dashboard of the vehicle.

Further, the hard disk 7 is inserted, and the pins 7 b of the hard disk 7 are
5 is inserted into the opening 25a of the hard disk 7.
The overhanging piece 7c provided at the rear end of the
The switch 33b is turned on by pressing the operating pin 35b of b to sink into the main body 34b.

When the decorative cover 6 is attached to the hard disk insertion slot 9 as shown in FIG. 9, the convex portion 6a formed on the back surface of the decorative cover 6 presses the operating pin 35a and sinks into the main body 34a. Switch 33a is turned on. When these switches 33a and 33b are turned on and the main switch 37 is turned on, the backup power supply 38
, Power is supplied to the load 36, and the load 36 such as various drive units can be operated for the first time.

Incidentally, in this embodiment, the switch 3
The reason why two switches are connected in series so that power is not supplied from the backup power supply 38 to the load 36 unless both the switches 3a and 33b are turned on is, for example, the reason for the switch 33
When only the hard disk 7 is installed, the power is supplied from the backup power supply 38 to the load 36 only by attaching the decorative cover 6 to the hard disk insertion slot 9 even if the hard disk 7 is not inserted into the hard disk storage unit 2. While there is a problem of operating the load 36, the switch 3
This is because, when only 3b is installed, a problem occurs in which power is still supplied from the backup power supply 38 to the load 36 even when the decorative cover 6 is removed.

Note that the present invention is not limited to the above embodiment, and various modifications can be made. For example, in the above embodiment, the contact claw 31 as a ground contact member is provided near the hard disk insertion slot 9 in the top plate portion 16 of the casing 15, but the present invention is not limited to this. The grounding contact member may be formed in a linear shape without being formed in a claw shape, as long as the grounding member can be grounded to the housing 1. There may be.

The present invention is not limited to the hard disk 7, but a ground contact member is arranged in the attaching / detaching passage 21 of the hard disk 8. Even when the hard disk 8 is charged, the static electricity charged on the hard disk 8 is covered by the pin 8 b of the hard disk 8.
The grounding member may be grounded before being inserted into the opening 25a.

In the above-described embodiment, two switches 33a,
The switch 33b is arranged in the attachment / detachment passage 21 of the hard disk 7 so that the switch 33b is turned on when the hard disk 7 is inserted into the hard disk storage unit 2 from the hard disk insertion slot 9 without being limited to this. Good.

Further, in the above-described embodiment, the example in which the two hard disks 7 and 8 are mounted in the hard disk storage unit 2 has been described, but at least the hard disk 7 storing data such as map data and personal music information. May be mounted, and three or more hard disks may be mounted if necessary.

As described above, according to the electronic apparatus of the present embodiment, since the contact claws 31 as the ground contact members are disposed in the attachment / detachment passage 21 of the hard disk 7, when the hard disk 7 is mounted on the hard disk storage unit 2. Even if the static electricity accumulated in the human body is charged on the hard disk 7, the static electricity charged on the hard disk 7 can be reliably grounded through the contact claws 31 before the pins 7b of the hard disk 7 are inserted into the openings 25a of the cover 25. it can. This protects the storage contents of the hard disk 7 and prevents other electronic components from being damaged without applying a high voltage due to static electricity from the hard disk 7 to other electronic components.

Further, according to this embodiment, the map data stored in the navigation device is stored in the hard disk 7 in advance, so that the map data stored in the hard disk 7 can be reliably protected from static electricity. When updating the stored map data, the hard disk 7 can be attached to and detached from the hard disk storage unit 2 without adversely affecting the apparatus body.

Further, according to the present embodiment, since the contact claws 31 are provided on the casing 15 for storing the hard disk 7, the contact claws 31 can be easily provided.
In addition, since the contact claws 31 formed on the casing 15 come into contact with the outer surface of the hard disk 7 when the hard disk 7 is mounted, the static electricity charged on the hard disk 7 causes the pins 7 b of the hard disk 7 to move to the opening 25 a of the cover 25. The ground can be reliably and easily grounded through the contact claws 31 before being inserted.

According to the present embodiment, the contact claw 31
Is formed near the hard disk insertion slot 9 in the casing 15, when the hard disk 7 is mounted on the casing 15, the distance and time during which the contact claws 31 are in contact with the hard disk 7 become longer, and the static electricity charged on the hard disk 7 is discharged. Before the pins 7b of the hard disk 7 are inserted into the openings 25a of the cover 25, the grounding can be reliably performed.

According to the present embodiment, the insulating tongues 7d, 8d for grasping with the fingers when attaching or removing the hard disks 7, 8 are attached to the rear ends of the hard disks 7, 8 on the insertion side. Therefore, when the user installs or removes the hard disks 7 and 8,
It is possible to prevent static electricity accumulated in the human body from being charged on the hard disk 7 beforehand.

According to this embodiment, the cover 25 has a slight gap 27 with respect to the body 24 of the connector 23, and the projections 25a are fitted into the respective slits 24b. Since the cover 25 is swingable with respect to the body 24 while the contact fitting 26 is interposed therebetween, the pins 7b and 8b of the hard disks 7 and 8 are inserted into the connector 23 in a slightly shifted positional relationship. Cover the pins 7b and 8b.
As a result, it is possible to easily insert the pins 7b and 8b of the hard disks 7 and 8 into the opening 25a of the cover 25 as a result.

On the other hand, according to the present embodiment, the switch 33 a for detecting that the decorative cover 6 detachably attached to the hard disk insertion slot 9 has been removed from the hard disk insertion slot 9, and the hard disk 7 from the hard disk storage 2. Switch 3 for detecting removal
3b, when at least one of the switches 33a, 33b detects, the power supply from the backup power supply 38 is cut off to protect the data recorded on the hard disk 7 when the hard disk 7 is attached and detached. In addition, malfunction of the device can be prevented from occurring.

According to the present embodiment, since the switches 33a and 33b are arranged side by side in the hard disk insertion slot 9, the work of attaching the switches 33a and 33b becomes easy.

Further, the switch 33a detects the contact and separation of the projection 6a formed on the decorative cover 6, while the switch 3a
3b detects the contact or separation of the overhanging piece 7c provided at the rear end of the hard disk 7 on the insertion side, so that the switch 33
It is possible to improve the detection accuracy of a and 33b.

According to the power supply protection method of the present embodiment, when at least the switch 33a detects the power supply, the power supply from the backup power supply 38 is cut off, so that the decorative cover 6 is removed from the hard disk insertion slot 9. , Shut off the power supply. Thus, when the decorative cover 6 is removed, the power supply to the hard disk 7 and the like is cut off, thereby protecting data recorded on the hard disk 7 when the hard disk 7 is attached and detached, and Can be prevented from occurring beforehand.

[0064]

As described above, according to the electronic apparatus of the present invention, the first detecting means for detecting that the cover detachably attached to the recording medium insertion slot has been removed from the recording medium insertion slot. Second detecting means for detecting that the magnetic recording medium has been removed from the recording medium storage unit, and when at least one of the first detecting means and the second detecting means detects the power, the power from the power supply By shutting off the supply of data, it is possible to protect the data recorded on the magnetic recording medium when the magnetic recording medium is attached and detached, and to prevent the malfunction of the device beforehand. It is possible to provide an electronic device with high reliability.

Further, according to the power supply protection method for an electronic device of the present invention, when at least the first detection means detects the power supply, the power supply from the power supply is cut off, so that the cover is removed from the recording medium insertion slot. Power supply is cut off. Thereby, when the cover is removed, the power supply to the magnetic recording medium or the like is cut off, thereby protecting data recorded on the magnetic recording medium when the magnetic recording medium is attached or detached, and It is possible to prevent a malfunction of the device from occurring.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a navigation device to which an embodiment of an electronic device according to the present invention is applied.

FIG. 2 is a front view showing the navigation device of FIG. 1;

FIGS. 3A and 3B show the recording medium storage section of FIG. 1, wherein FIG. 3A is a perspective view of the recording medium storage section viewed from the bottom side, and FIG. 3B is a perspective view showing the recording medium storage section inverted.

FIG. 4 is a perspective view showing the connector of FIG. 3;

FIG. 5 is an enlarged front view of FIG. 4;

FIG. 6 is a sectional view taken along line AA of FIG. 5;

FIG. 7 is a side view of FIG. 5;

FIG. 8 is a sectional view showing a contact claw of a casing in FIG. 3;

FIG. 9 is a cross-sectional view showing two switches arranged in an opening of a hard disk insertion slot in FIG. 2;

10 is a circuit diagram showing a power supply protection circuit in which two switches of FIG. 9 are connected in series.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Hard disk storage part (recording medium storage part) 3 PC card storage part 4 Board / fan storage part 5 Front panel 6 Decorative cover 7 Hard disk (magnetic recording medium) 8 Hard disk (magnetic recording medium) 9 Hard disk insertion slot (recording) Medium insertion opening 15 casing (conductive case) 16 top plate 17 side plate 18 rail member 19 guide groove 20 guide groove 21 detachable passage 22 substrate 23 connector 24 body 25 cover 26 contact fitting 27 gap 30 cutout 31 contact claw Ground contact member) 33a Switch (first detecting means) 33b Switch (second detecting means) 34a, 34b Main body 35a, 35b Operating pin 36 Load 37 Main switch 38 Backup power supply

Claims (4)

[Claims] 1. An electronic device having a recording medium storage section for detachably storing a magnetic recording medium, wherein the cover is detachably attached to a recording medium insertion opening of the recording medium storage section, and the cover is the recording medium. A first detection unit that detects that the magnetic recording medium has been removed from the insertion opening; and a second detection unit that detects that the magnetic recording medium has been removed from the recording medium storage unit. And an electronic device that shuts off power supply from a power supply when at least one of the second detection means detects the detection. 2. The electronic device according to claim 1, wherein said first detection means and said second detection means are arranged side by side in said recording medium insertion slot. 3. The electronic device according to claim 1, wherein the first detecting means detects contact / separation of a protrusion formed on the cover, and the second detecting means detects the magnetic force. An electronic device for detecting contact and separation of an overhang provided at a rear end of a recording medium. 4. The first detection means detects that the cover detachably attached to the recording medium insertion port of the recording medium storage section for detachably storing the magnetic recording medium has been removed from the recording medium insertion port. Thereafter, the second detecting means detects that the magnetic recording medium has been removed from the recording medium storage unit, and when at least the first detecting means detects, the supply of power from a power supply is cut off. Characteristic power supply protection method for electronic equipment.