JP2001251064A - Open / closed detection device and electronic apparatus having open / closed detection device - Google Patents

Abstract

(57) Abstract: An opening / closing detection device and an electronic device having an opening / closing detection device capable of reliably detecting in a non-contact manner whether an opening / closing portion for preventing a battery from falling out of a housing is opened. Providing equipment. SOLUTION: It is detected whether or not an opening / closing section 40 for preventing a battery BT disposed in a housing 12 of the electronic device 10 and mounted in the housing 12 from dropping out of the housing 12 is open. The opening / closing detection device 120,
0, a magnetism detecting element 70 disposed in the housing 12 of the electronic device 10 for detecting whether or not the opening / closing unit 40 is open and detecting the magnetism of the magnet 60 and outputting a detection signal; Is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing detecting device and an opening / closing detecting device for detecting a state in which an opening / closing portion for preventing a battery mounted in a housing of an electronic device from falling out of the housing is opened. The present invention relates to an electronic device having:

[0002]

2. Description of the Related Art As electronic devices, for example, small electronic devices for recording sound have been put on the market. A drive battery is detachably accommodated in a housing of this type of electronic device. In addition, the housing has a lid for opening and closing so that the battery does not fall out of the housing.

[0003]

However, if the battery is detached by opening the lid of the housing, the computer inside the electronic equipment cannot be energized, and the user must re-install the battery. Even so, the computer may malfunction. In order to prevent this, it is conceivable to detect the opening of the lid of the housing using a contact-type switch, but this type of contact-type mechanical switch is difficult to miniaturize and is difficult to use in electronic devices. This is an obstacle to miniaturization and thinning. In addition, since the contact type switch detects that the lid is open by contacting a part of the lid, there are variations in the mounting accuracy of the contact switch, the shape accuracy of the contact switch itself, the shape accuracy of the lid, and the like. Therefore, it cannot be said that the lid can always contact the contact switch with certainty, and the reliability is poor. Therefore, the present invention has an opening / closing detection device and an opening / closing detection device that can solve the above-described problem and can reliably detect in a non-contact manner whether an opening / closing portion for preventing a battery from dropping out of a housing is open. The purpose is to provide electronic equipment.

[0004]

According to a first aspect of the present invention, an opening / closing portion for preventing a battery disposed in a housing of an electronic device from being dropped from the housing is opened. An opening / closing detection device for detecting whether the opening / closing portion is open, and a magnet disposed in the opening / closing portion, and a magnet disposed in the housing of the electronic device, and detecting the magnetism of the magnet to determine whether the opening / closing portion is open. And a magnetic detection element for outputting a detection signal. In the first aspect, the magnet is disposed in the opening / closing section. The magnetic detection element is arranged in a housing of the electronic device. This magnetic detection element detects the magnetism of the magnet as to whether the opening / closing section is open and outputs a detection signal. Thus, the magnetic detection element can reliably detect whether the opening / closing portion is open in a non-contact manner. This makes it possible to reliably determine whether or not the open / close section is open, as compared to the type using a contact switch, and the magnetic detection element and magnet are smaller than a mechanical switch of the contact type. Therefore, the size of the opening / closing detection device and the electronic apparatus having the opening / closing detection device can be reduced.

According to a second aspect of the present invention, in the opening / closing detection device according to the first aspect, the opening / closing section is opened from the housing by rotating, and when the opening / closing section is opened, the magnetic detecting element is mounted on the housing. This configuration does not detect the magnetism of the magnet. According to the second aspect, the opening / closing section is opened from the housing by rotating, and the magnetic detecting element does not detect the magnetism of the magnet when the opening / closing section is open.

According to a third aspect of the present invention, in the opening / closing detection device according to the first aspect, the opening / closing section is opened from the housing by sliding, and when the opening / closing section is open, the magnetic detecting element is mounted on the housing. This configuration does not detect the magnetism of the magnet. According to the third aspect, the opening / closing section is opened from the housing by sliding, and the magnetic detecting element does not detect the magnetism of the magnet when the opening / closing section is open.

According to a fourth aspect of the present invention, in the opening / closing detection device according to the first aspect, when the opening / closing portion is opened, the detection signal output by the magnetic detection element is used to reset the processing device. Given to the device. In claim 4,
The detection signal output from the magnetic detection element is provided to the processing device to reset the processing device. As a result, even if the opening / closing unit is opened and the battery is removed from the housing, the detection signal resets the processing device when the opening / closing unit is opened,
Malfunction of the processing device can be prevented.

According to a fifth aspect of the present invention, in the opening / closing detecting device according to the fourth aspect, the magnetic detecting element is a Hall element, and the Hall element detects the magnetism of the magnet at an arbitrary time interval by pulse driving. . According to the fifth aspect, the magnetic detection element is a Hall element, and the Hall element detects the magnetism of the magnet at an arbitrary time interval by pulse driving. As a result, power saving can be achieved as compared with the type in which the Hall element is always energized and detects.

According to a sixth aspect of the present invention, it is detected whether or not an opening / closing portion for preventing a battery disposed in a housing of an electronic device from being detached from the housing is opened. An electronic device having an opening / closing detection device, wherein the opening / closing detection device is provided with a magnet disposed in the opening / closing unit and disposed in the housing of the electronic device.
An electronic device having an opening / closing detection device, comprising: a magnetic detection element that detects the magnetism of the magnet and outputs a detection signal as to whether the opening / closing section is open. In claim 6, the magnet is arranged in the opening / closing section. The magnetic detection element is arranged in a housing of the electronic device. This magnetic detection element detects the magnetism of the magnet as to whether the opening / closing section is open and outputs a detection signal.
Thus, the magnetic detection element can reliably detect whether the opening / closing portion is open in a non-contact manner. This makes it possible to reliably determine whether the open / close section is open, as compared to a type that uses a contact switch, and makes the magnetic sensing element and magnet smaller than a mechanical switch of the contact type. Therefore, the size of the opening / closing detection device and the electronic device having the opening / closing detection device can be reduced.

According to a seventh aspect of the present invention, in the electronic device having the opening / closing detection device according to the sixth aspect, the opening / closing section is opened from the housing by being rotated, and the magnetic element is opened when the opening / closing section is opened. The detection element is configured not to detect the magnetism of the magnet.

According to an eighth aspect of the present invention, in the electronic device having the opening / closing detection device according to the sixth aspect, the opening / closing portion is opened from the housing by sliding, and the magnetic device is opened when the opening / closing portion is opened. The detection element is configured not to detect the magnetism of the magnet.

According to a ninth aspect of the present invention, in the electronic apparatus having the open / close detection device according to the sixth aspect, the detection signal output by the magnetic detection element is provided to the processing device in order to reset the processing device. Can be According to the ninth aspect, the detection signal output by the magnetic detection element is provided to the processing device to reset the processing device. Thus, even if the opening / closing section is opened and the battery is removed from the inside of the housing, the detection signal resets the processing apparatus when the opening / closing section is opened, so that malfunction of the processing apparatus can be prevented.

According to a tenth aspect of the present invention, in the electronic apparatus having the opening / closing detection device according to the ninth aspect, the magnetic detecting element is a Hall element, and the Hall element is connected to the magnet at an arbitrary time interval by pulse driving. Detect magnetism. In the tenth aspect, the magnetic detection element is a Hall element, and the Hall element detects the magnetism of the magnet at an arbitrary time interval by pulse driving. As a result, power saving can be achieved as compared with the type in which the Hall element is always energized and detects.

[0014]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Note that the embodiments described below are preferred specific examples of the present invention,
Although various technically preferable limits are given, the scope of the present invention is not limited to these modes unless otherwise specified in the following description.

FIG. 1 shows an example of an electronic apparatus having the open / close detection device of the present invention. The electronic device 10 includes a housing 12
The housing 12 has a front part 14 and a rear part 16. The housing 12 is configured by overlapping or fitting the front portion 14 and the rear portion 16. The front section 14 has, for example, an information display section 15 and an operation section (not shown). In addition, the front part 14 and the rear part 16 each have necessary functions, but are not shown. A socket 19 for attaching and detaching a plug 18A of the earphone 18 is provided at an upper portion of the front portion 14.

In the electronic device 10, a user inserts an information recording medium card (hereinafter, simply referred to as a card) 30 as shown in FIG. This is a small-sized electronic device having a function of allowing recorded information to be listened to by earphones 18, for example. The audible information is, for example, music information, language information, or other information. The card 30 is, for example, a rectangular and plate-shaped card. The storage capacity of the card 30 is, for example, 4 MB, 8 MB, 64 MB, or the like, but is not limited to this value. The information that can be recorded on the card 30 is audio information, image information, and the like, but can store still images, moving images, music data, and the like.

FIG. 2 is a front view of the electronic device 10 of FIG. 1, and FIG. 3 is a back view of the electronic device 10. As shown in FIG. 2, various operation units 20, 22, 2
4, 26, a speaker 28, and the like.

In FIG. 3, the rear section 16 includes various switches 30, 32, and 34 and an opening / closing section 40 for battery replacement.
have. The opening / closing unit 40 is a lid for replacing the battery BT that can be opened in the R direction around the CL and closed in the R1 direction as shown in FIGS. 4 and 5. It is a lid that keeps it from falling off. As shown in FIG.
As described above at 44, it can be opened in the R direction shown in FIG. 4 or closed in the R1 direction shown in FIG. Batteries BT are respectively mounted in the accommodating portions 50 and 52 of the housing 12 and can be electrically connected in series, for example. As the battery BT, for example, a primary battery or a secondary battery can be used. When a primary battery is used, charging cannot be performed, but when a secondary battery is used, charging can be performed a plurality of times. Primary batteries include alkaline batteries and manganese batteries, and secondary batteries include lithium ion batteries, nickel cadmium batteries, and lithium polymer batteries.

FIGS. 6 (A) and 7 (A) correspond to AA in FIG.
6 shows a state in which the opening / closing section 40 is open, and FIG. 7 shows a state in which the opening / closing section 40 is completely closed. As shown in FIGS. 6 and 7, a circuit board 50 is housed in the housing 12. This circuit board 5
A Hall element 70 which is a magnetic detection element (also referred to as a magnetic detection sensor) is electrically connected to 0. On the other hand, a magnet 60 is fixed to the inner end 46 of the opening / closing section 40. The magnet 60 and the Hall element 70
Constitutes the open / close detection device 120. The Hall element side of the magnet 60 is an S pole. In FIG. 6A, in the state where the opening / closing section 40 has begun to open or has been opened, the magnet 60 is separated from the Hall element 70, so that the Hall element 70 is in the HIGH state as shown in FIG. The detection signal S is detected.

On the other hand, when the opening / closing section 40 is completely closed with respect to the rear section 16 and the front section 14 as shown in FIG. Face to face. For this purpose, the Hall element 70 detects the magnetism of the magnet 60, and as shown in FIG.
Changes from HIGH to LOW. When the detection signal S of the Hall element 70 changes from LOW to HIGH, the processing unit 100 receives the HIGH detection signal S as shown in FIG. As shown in FIG.
When the battery starts opening or is open, the battery BT may come off from the inside of the housing 12. In this case, the detection signal S of the Hall element 70 in FIG. 8 changes from LOW to HIGH as shown in FIG.
By receiving the HIGH detection signal S, the processing unit 100 is reset.

FIG. 8 shows the processing section 100, the connector 101, the Hall element 70 and the like mounted on the circuit board 50. The processing unit 100 is electrically connected to the connector 101 and the Hall element 70. The connector 101 is a part for electrically connecting the electric terminals of the card 30 when the card 30 is inserted so that signals can be exchanged with the processing unit 100 electrically.

FIG. 9 shows an example of a connection circuit of the Hall element 70. The Hall element 70 is connected to a Schmitt circuit 72 via an amplifier 71. Schmitt circuit 72
Are two FETs (field effect transistors) 73 and 74
Is connected. This circuit has an output section 7 for the detection signal S.
Five. Using this Schmitt circuit 72,
As compared with a case where the pulse is not used, there is an effect of removing a noise component and shortening a rise / fall time of a pulse. Hall element 70, amplifier 71, Schmitt circuit 72 and FET 73,
Reference numeral 74 is connected to the reference voltage Vcc.
A current regulator (Reg.) 76 is provided between the cc and the Hall element 70, the amplifier 71, and the Schmitt circuit 72.

The magnet 60 shown in FIG. 2 is, for example, preferably an S-pole magnet on the Hall element side.
When the Hall element 70 detects the magnetism of the magnet 60, the Hall element 70 shown in FIG. The amplifier 71 amplifies the electric signal and supplies it to the Schmitt circuit 72. The Schmitt circuit 72 in FIG. 9 operates according to the operation diagram as shown in FIG. 10 and operates the transistors 73 and 74 to output the detection signal S from the output unit 75.

FIG. 10 shows that the detection signal of the Hall element becomes HIGH or LOW depending on the strength of the magnetic field of the S pole of the magnet.

FIG. 11 shows an example of a pulse drive waveform when the regulator 76 of FIG. 9 drives the Hall element 70 in pulses. By performing pulse driving in this manner, power consumption can be reduced. The pulse P in FIG. 11 generates the pulse P at an arbitrary time interval TT. Each pulse P has a pulse width W.

FIGS. 12A and 12B show examples of timing charts of the Hall element 70 by the pulse driving. FIG. 12A shows that when a pulse comes after the magnetic field (B) exceeds the operation start magnetic field (Bop), the output changes from HIGH to LOW in accordance with the fall of the pulse. In FIG. 12B, the magnetic field (B)
Indicates that when a pulse comes after the voltage drops below the operation release magnetic field (Brp), the output changes from LOW to HIGH in accordance with the fall of the pulse. As described above, when a voltage is supplied from the reference voltage Vcc to the Hall element 70 of FIG. Operation with low power can be performed.

Next, in the electronic device 10 described above, FIG.
A detection example of whether or not the opening / closing unit 40 of the battery BT shown in FIG. As shown in FIGS. 4 and 7,
When the opening / closing section 40 is completely closed with respect to the rear section 16 and the front section 14 of the housing 12, the magnet 60 faces the Hall element 70 with a predetermined gap. The detection signal S of the Hall element 70 changes from HIGH to LOW. As a result, the LOW detection signal S is supplied to the processing unit 100 in FIG.

On the other hand, as shown in FIGS. 6 and 5, when the opening / closing section 40 slides in the E direction and slightly starts to open in the R direction or completely opens, the battery BT is A phenomenon occurs in which the body 12 comes off the accommodation portion 50. If the battery BT comes off in this way, the processing unit 100 shown in FIG. 8 will not be energized from the battery BT. When the user mounts the battery BT again in the housing unit 50, the processing unit 100 receives power again from the battery BT, and the processing unit 100 may malfunction.

As shown in FIG. 6A, when the opening / closing section 40 has begun to open or has been opened, the magnet 60 separates from the Hall element 70.
Cannot detect the magnetism of the magnet 60. Accordingly, the detection signal S of the Hall element 70 changes from LOW to HIGH as shown in FIG. The HIGH detection signal S is sent to the processing unit 100, and the processing unit 100 performs a reset process based on the HIGH detection signal S. In this way, the battery B is removed from the user.
When the T is reattached to and electrically connected to the storage unit 50 of FIG. 6, the processing unit 100 can be restarted without causing a malfunction.

FIG. 13 shows another embodiment of the present invention. In the embodiment shown in FIG.
A magnet 60 is mounted inside 46.
The opening / closing section 40 may be rotated in the R direction. 6 and 7
In the embodiment, the opening / closing section 40 slides in the E direction once and then rotates in the R direction to open the housing section 50. In the case of FIG. 13 as well, when the opening / closing section 40 is opened, the magnet 60 separates from the Hall element 70, so that the detection signal S of the Hall element 70 changes from LOW to HIGH. This is the same as the embodiment of FIGS. 6 and 7.

As described above, the Hall element 70 is
0 can be magnetically detected in a non-contact manner, so that unlike the related art, no mechanical contact is required to detect whether the opening / closing section for preventing the battery from dropping is open, and the Hall element 70 In addition, since the magnet 60 can be made very small, the opening / closing detection device is also useful for promoting the miniaturization of the electronic device itself. Since detection by mechanical contact is not used, durability can be improved.
As described above, since the Hall element 70 is preferably a pulse-driven Hall element, it is not necessary to constantly supply current to the Hall element, so that power can be saved.

The present invention is not limited to the above embodiment. In the above-described embodiment, as an example of the electronic apparatus, a portable and small-sized type in which an information recording medium card is inserted or removed is exemplified. However, the present invention is not limited to this, and various types of electronic devices having the object discriminating device of the present invention include mobile phones, small computers, desktop computers, television receivers, video cameras, still cameras, clocks, and game machines. It includes electronic equipment.

In the above-described embodiment, the example of the Hall element (Hall IC) is given as an example of the magnetic detection element. However, the present invention is not limited to this, and other types of magnetic detection elements may be used. The magnet having an N pole may be used instead of the S magnet having a Hall element side. As the Hall element, another type can be used instead of the pulse drive type. The battery may be of any shape, such as cylindrical, square, or flat.

In the embodiment of the present invention, the opening / closing portion provided to prevent the battery from dropping off may be of a type that slides and then rotates as shown in FIG. A rotating type as shown in FIG. 13 can be employed, but other types may be employed. The magnet may be arranged on the substrate side in the housing 12 and the Hall element may be arranged inside the opening / closing section. FIG. 6 (B) and FIG. 13 (B)
As a matter of course, the detection signal S of the Hall element 70 may be changed from HIGH to LOW in the state where the opening / closing unit 40 is open as described above. As described above, by using the electronic device having the switching device of the present invention, the switching device and the electronic device can be reduced in size, thickness, and power consumption,
Reliability is improved. By using the embodiment of the present invention, by detecting the open / close state of the opening / closing unit which is a lid of a battery (battery), there is an advantage that a system error does not occur even if the battery is accidentally removed from the housing. is there.

[0035]

As described above, according to the present invention,
It is possible to reliably detect in a non-contact manner whether or not an opening / closing portion for preventing the battery from falling out of the housing is open.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an example of an electronic apparatus including an open / close detection device of the present invention.

FIG. 2 is an exemplary front view of the electronic apparatus of FIG. 1;

FIG. 3 is an exemplary rear view of the electronic apparatus shown in FIG. 1;

FIG. 4 is a perspective view showing a back side of the electronic apparatus of FIG. 1, showing a state in which an opening and closing unit is closed.

FIG. 5 is a perspective view of the electronic device as viewed from the back side, showing a state where an opening / closing unit is open.

6 is a cross-sectional view taken along the line AA in FIG. 5, showing a state in which the opening / closing unit has begun to open or is completely open.

7 is a cross-sectional view taken along the line AA of FIG. 5, showing a state in which the opening and closing unit is completely closed.

FIG. 8 is a diagram showing a hall element, a battery, a processing unit, and the like.

FIG. 9 illustrates a Hall element, a Schmitt circuit, and the like.

FIG. 10 is a diagram illustrating characteristics of a Schmitt circuit.

FIG. 11 is a diagram showing an example of a waveform for pulse driving a Hall element.

FIG. 12 is a diagram showing an example of a waveform for pulse driving a Hall element.

FIG. 13 is a diagram showing another embodiment of the open / close detection device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Electronic equipment, 40 ... Opening / closing part, 60 ... Magnet, 70 ... Hall element (magnetic detection element), 1
20 Open / close detection device

Claims (10)

[Claims] An opening / closing detection device for detecting whether an opening / closing portion for preventing a battery disposed in a housing of an electronic device and mounted in the housing from dropping out of the housing is open. A magnet arranged in the opening / closing section, and a magnetism detecting element arranged in the housing of the electronic device and detecting a magnetism of the magnet to detect whether the opening / closing section is open and outputting a detection signal, An opening / closing detection device, comprising: 2. The opening / closing device according to claim 1, wherein the opening / closing portion is opened from the housing by being rotated, and the magnetism detecting element does not detect the magnetism of the magnet when the opening / closing portion is opened. Detection device. 3. The opening and closing device according to claim 1, wherein the opening and closing portion is opened from the housing by sliding, and the magnetic detecting element does not detect the magnetism of the magnet when the opening and closing portion is open. Detection device. 4. The opening / closing detection device according to claim 1, wherein when the opening / closing section is opened, the detection signal output by the magnetic detection element is provided to the processing device to reset the processing device. 5. The magnetic detecting element is a Hall element,
The open / close detection device according to claim 4, wherein the Hall element detects the magnetism of the magnet at an arbitrary time interval by pulse driving. 6. An opening / closing detection device for detecting whether an opening / closing section for preventing a battery disposed in a housing of an electronic device and mounted in the housing from dropping out of the housing is open. An electronic device, wherein the opening / closing detection device includes: a magnet disposed in the opening / closing unit; and a magnet disposed in the housing of the electronic device, detecting whether the opening / closing unit is open by detecting the magnetism of the magnet. An electronic apparatus having an opening and closing detection device, comprising: a magnetic detection element that outputs a detection signal. 7. The opening / closing device according to claim 6, wherein the opening / closing portion is opened from the housing by being rotated, and the magnetism detecting element does not detect the magnetism of the magnet when the opening / closing portion is opened. Electronic equipment having a detection device. 8. The opening and closing device according to claim 6, wherein the opening and closing portion is opened from the housing by sliding, and the magnetic detecting element does not detect the magnetism of the magnet when the opening and closing portion is open. Electronic equipment having a detection device. 9. An electronic apparatus having the open / close detection device according to claim 6, wherein the detection signal output by the magnetic detection element is provided to the processing device to reset the processing device. 10. The electronic apparatus according to claim 9, wherein the magnetic detection element is a Hall element, and the Hall element detects the magnetism of the magnet at an arbitrary time interval by pulse driving.