CA2109406C - Battery detecting device for a radio pager - Google Patents
Battery detecting device for a radio pagerInfo
- Publication number
- CA2109406C CA2109406C CA002109406A CA2109406A CA2109406C CA 2109406 C CA2109406 C CA 2109406C CA 002109406 A CA002109406 A CA 002109406A CA 2109406 A CA2109406 A CA 2109406A CA 2109406 C CA2109406 C CA 2109406C
- Authority
- CA
- Canada
- Prior art keywords
- battery
- primary battery
- electrode side
- contact
- negative electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/18—Prevention or correction of operating errors
- G08B29/181—Prevention or correction of operating errors due to failing power supply
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/216—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for button or coin cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/584—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries
- H01M50/59—Means for preventing undesired use or discharge for preventing incorrect connections inside or outside the batteries characterised by the protection means
- H01M50/597—Protection against reversal of polarity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- General Chemical & Material Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mobile Radio Communication Systems (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Battery Mounting, Suspending (AREA)
- Measurement Of Current Or Voltage (AREA)
- Stand-By Power Supply Arrangements (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
In a device applicable to a pager or similar electronic apparatus for detecting a thin disk-like primary battery which feeds power to a load circuit, a secondary battery is provided which is complementary to the primary battery. A receiving portion receives the primary battery and has a first contact terminal for contacting the positive electrode side of the battery, a second contact terminal for contacting the negative electrode side of the battery at one end and connected to ground at the other end, and a third contact terminal contacting the negative electrode side of the battery at one end. When the primary battery is inserted in the receiving portion in a predetermined orientation, a detecting unit determines that the battery is present on the basis of the contact of the second and third contact terminals via the negative electrode side of the battery.
Description
2109~06 BATTERY DETECTING DEVICE FOR A RADIO PAGER
The present invention relates to an electronic apparatus powered by a battery and, more particularly, to a device advantageously applicable to a radio pager for determining 5 whether or not a battery is present in the pager.
Miniature electronic apparatuses extensively used today are powered by batteries. Once a battery is set in the battery receiving portion of such an apparatus, a condition wherein it is set or not set, i.e., whether or not the battery is present cannot 1 0 be seen from the outside. In the light of this, there have been proposed some approaches to determine whether or not a battery is present in the receiving portion without actually opening it. Japanese Patent Laid-Open Publication No. 174285, for example, discloses a battery detecting device implementing 1 5 this kind of approach. However, the conventional battery detecting devices are operable only with a limited kind of battery and cannot detect the presence of a battery with certainty.
*
A
210940~
It is therefore an object of the present invention to provide a battery detecting device capable of detecting the presence of a battery with certainty when 5 the battery is set in the receiving portion of an electronic apparatus.
It is another object of the present invention to provide an inexpensive and vibration-resistant battery detecting device.
In accordance with the present invention, a device for detecting a thin disk-like primary battery which feeds power to I O a load circuit has a secondary battery which is complementary to the primary battery. A receiving portion receives the primary battery and has a first contact terminal for contacting the positive electrode side of the battery, a second contact terminal for contacting the negative electrode side of t h e 15 battery at one end and connected to ground at the other end, and a third contact terminal contacting the negative electrode side of the battery at one end. When the primary battery is inserted in the receiving portion in a predetermined orientation, a detecting unit determines that the battery is present on t h e 2 0 basis of the contact of the second and third contact terminals via the negative electrode side of the battery.
The present invention relates to an electronic apparatus powered by a battery and, more particularly, to a device advantageously applicable to a radio pager for determining 5 whether or not a battery is present in the pager.
Miniature electronic apparatuses extensively used today are powered by batteries. Once a battery is set in the battery receiving portion of such an apparatus, a condition wherein it is set or not set, i.e., whether or not the battery is present cannot 1 0 be seen from the outside. In the light of this, there have been proposed some approaches to determine whether or not a battery is present in the receiving portion without actually opening it. Japanese Patent Laid-Open Publication No. 174285, for example, discloses a battery detecting device implementing 1 5 this kind of approach. However, the conventional battery detecting devices are operable only with a limited kind of battery and cannot detect the presence of a battery with certainty.
*
A
210940~
It is therefore an object of the present invention to provide a battery detecting device capable of detecting the presence of a battery with certainty when 5 the battery is set in the receiving portion of an electronic apparatus.
It is another object of the present invention to provide an inexpensive and vibration-resistant battery detecting device.
In accordance with the present invention, a device for detecting a thin disk-like primary battery which feeds power to I O a load circuit has a secondary battery which is complementary to the primary battery. A receiving portion receives the primary battery and has a first contact terminal for contacting the positive electrode side of the battery, a second contact terminal for contacting the negative electrode side of t h e 15 battery at one end and connected to ground at the other end, and a third contact terminal contacting the negative electrode side of the battery at one end. When the primary battery is inserted in the receiving portion in a predetermined orientation, a detecting unit determines that the battery is present on t h e 2 0 basis of the contact of the second and third contact terminals via the negative electrode side of the battery.
-3- 21a940~
Embodiments of the invention will now be described, by way of example, with reference to the accom~allyillg drawings, wherein:
FIGS. 1 and 2 are circuit diagrams each showing a specific conventional battery detecting device;
S FIG. 3 is a perspective view of a radio pager to which a battery detecting device embodying the present invention is applicable;
FIG. 4 is a block diagram schematically showing the embodiment;
1 0 FIG. 5A is a plan view of a portion for accommodating a primary battery particular to the embodiment;
FIG. SB is a section along line A-B of FIG. 5A;
FIG. 6A shows a battery holder received in the portion of FIG. 5A in a correct orientation; and 1 5 FIG. 6B shows the battery holder received in the same portion upside down.
To better understand the present invention, a brief 2 0 reference will be made to a conventional battery detecting device for a radio pager, shown in FIG. 1. The device of FIG. 1 is of the type taught in previously mentioned Kokai No.
174285/1988 and implemented as a part of a charger for charging a battery. As shown, a chargeable battery B to be 2 5 charged is cylindrical and provided with a A
2109~06 conductive portion 110 on a part of the outer periphery thereof.
The charger has a pair of contact portions 106 and 107 which contact the conductive portion 110 when the battery B is set on the charger. The battery B has a positive electrode 104 and a S negative electrode 105. There are also shown in the figure a plug 101, a voltage lowering transformer 102, a constant voltage circuit 103 made up of a Zener diode D 1 and a capacitor C, transistors Q1-Q3, light emitting elements D2 and D3, and resistors R 1 and R2.
1 0 To charge the battery B, the battery B is set on a mounting portion included in the casing of the charger. Then, the contact portions 106 and 107 of the charger are brought into conduction via the conductive portion 110 of the- battery. As a result, the charging circuit shown in FIG. 1 is driven by a conduction current to charge the battery B. When an unchargeable battery, i.e., a battery lacking the conductive portion 110 is inadvertently set on the charger, the contact portions 106 and 107 remain out of conduction, preventing the charger from charging the battery.
2 0 As stated above, the charger determines whether or not the battery B set thereon is chargeable by determining whether or not a conduction current flows between the contact portions 106 and 107. When the battery set on the charger is unchargeable, a current does not flow into the battery. Further, 2 5 whether or not a conductive current flows between the contact , ~
- 2 ~ 0 6 portions 106 and 107 indicates whether or not the battery B is present on the mounting portion of the charger, thereby implementing a battery detecting device.
Another conventional battery detecting device is shown in 5 FIG. 2. As shown, the device has a coin type primary battery Bl for feeding power to a load circuit 122, a secondary battery B2 complen-ent~ry to the primary battery Bl, a boosting circuit 123, a pull-down resistor R~, a current limiting resistor R3, a pull-up resistor R4, a capacitor C2 for preventing chattering, a 10 transistor TRI , and a CPU (Central Processing Unit) 130. The transistor TRl monitors the output voltage of the primary battery Bl and constantly reports whether or not the battery B
is present to the CPU 130.
In the charger shown in FIG. t, the battery detecting 1 5 device built therein is implemented by the conductive portion 110 of the battery B, and the contact portions 106 and 107, as stated above. When the contact portions 106 and 107 are brought into conduction via the conductive portion 110, t h e device determines that the battery B is present in the mounting 2 0 portion. With this kind of scheme, however, it is difficult to provide the conductive portion 110 on a coin type, i.e., thin disk-like primary battery, as distinguished from the cylindrical battery B. Therefore, the shape of the battery which the device can detect is limited.
A
Embodiments of the invention will now be described, by way of example, with reference to the accom~allyillg drawings, wherein:
FIGS. 1 and 2 are circuit diagrams each showing a specific conventional battery detecting device;
S FIG. 3 is a perspective view of a radio pager to which a battery detecting device embodying the present invention is applicable;
FIG. 4 is a block diagram schematically showing the embodiment;
1 0 FIG. 5A is a plan view of a portion for accommodating a primary battery particular to the embodiment;
FIG. SB is a section along line A-B of FIG. 5A;
FIG. 6A shows a battery holder received in the portion of FIG. 5A in a correct orientation; and 1 5 FIG. 6B shows the battery holder received in the same portion upside down.
To better understand the present invention, a brief 2 0 reference will be made to a conventional battery detecting device for a radio pager, shown in FIG. 1. The device of FIG. 1 is of the type taught in previously mentioned Kokai No.
174285/1988 and implemented as a part of a charger for charging a battery. As shown, a chargeable battery B to be 2 5 charged is cylindrical and provided with a A
2109~06 conductive portion 110 on a part of the outer periphery thereof.
The charger has a pair of contact portions 106 and 107 which contact the conductive portion 110 when the battery B is set on the charger. The battery B has a positive electrode 104 and a S negative electrode 105. There are also shown in the figure a plug 101, a voltage lowering transformer 102, a constant voltage circuit 103 made up of a Zener diode D 1 and a capacitor C, transistors Q1-Q3, light emitting elements D2 and D3, and resistors R 1 and R2.
1 0 To charge the battery B, the battery B is set on a mounting portion included in the casing of the charger. Then, the contact portions 106 and 107 of the charger are brought into conduction via the conductive portion 110 of the- battery. As a result, the charging circuit shown in FIG. 1 is driven by a conduction current to charge the battery B. When an unchargeable battery, i.e., a battery lacking the conductive portion 110 is inadvertently set on the charger, the contact portions 106 and 107 remain out of conduction, preventing the charger from charging the battery.
2 0 As stated above, the charger determines whether or not the battery B set thereon is chargeable by determining whether or not a conduction current flows between the contact portions 106 and 107. When the battery set on the charger is unchargeable, a current does not flow into the battery. Further, 2 5 whether or not a conductive current flows between the contact , ~
- 2 ~ 0 6 portions 106 and 107 indicates whether or not the battery B is present on the mounting portion of the charger, thereby implementing a battery detecting device.
Another conventional battery detecting device is shown in 5 FIG. 2. As shown, the device has a coin type primary battery Bl for feeding power to a load circuit 122, a secondary battery B2 complen-ent~ry to the primary battery Bl, a boosting circuit 123, a pull-down resistor R~, a current limiting resistor R3, a pull-up resistor R4, a capacitor C2 for preventing chattering, a 10 transistor TRI , and a CPU (Central Processing Unit) 130. The transistor TRl monitors the output voltage of the primary battery Bl and constantly reports whether or not the battery B
is present to the CPU 130.
In the charger shown in FIG. t, the battery detecting 1 5 device built therein is implemented by the conductive portion 110 of the battery B, and the contact portions 106 and 107, as stated above. When the contact portions 106 and 107 are brought into conduction via the conductive portion 110, t h e device determines that the battery B is present in the mounting 2 0 portion. With this kind of scheme, however, it is difficult to provide the conductive portion 110 on a coin type, i.e., thin disk-like primary battery, as distinguished from the cylindrical battery B. Therefore, the shape of the battery which the device can detect is limited.
A
The device shown in FIG. 2 has the following drawback. A s the load circuit 122 sequentially consumes current, the output voltage of the coin type primary battery Bl falls. When the duration of the fall of this output voltage exceeds a time 5 constant determined by the capacitor C2 and resistor R4, the CPU 130 determines that the battery Bl is absent despite that it is present.
Referring to FIG. 3, an electronic apparatus to which a battery detecting device embodying the present invention is 1 0 applicable is shown and implemented as a radio pager 1 by way of example. As shown, the pager 1 has a battery holder 3 loaded with a thin disk-like primary battery Bl, and a cavity 2 for receiving the battery holder 3.
FIG. 4 shows the circuit arrangement of the embodiment.
1 5 As shown, the primary battery Bl feeds power to a load circuit 12 and is complemented by a secondary battery B~. When the primary battery Bl is absent in the cavity 2, a boosting circuit 13 boosts the voltage of the secondary battery B2 and applies the boosted voltage to the load circuit 12. A contact terminal 2 0 24 contacts the positive electrode side of the primary battery Bl when the holder 3 is received in the cavity 2. A contact terminal 23 contacts the negative electrode side of the battery Bl at one end thereof and is connected to ground at the o t h e r end. A contact terminal 22 contacts the negative electrode s i d e 2 5 of the battery Bl at one end thereof. When a ground signal .~
~7~ 2109~6 appears on the other end of the contact terminal 22, a CPU 17 determines that the battery Bl has been set in the cavity 2 of the pager 1. There are also included in the circuitry a capacitor Cl for eliminating chattering when the battery Bl is inserted S into the cavity 2, and a pull-up resistor Rl.
FIGS. 5A, SB, 6A and 6B show the configurations of the cavity 2 and battery holder 3 specifically. As shown, the battery holder 3 is formed with a rectangular hole 31 in a part thereof where the primary battery Bl will be positioned. The 1 0 hole 31 allows the contact terminals 22 and 23 to contact the negative electrode side of the battery Bl therethrough. A
printed circuit board 21 is fixed in place in the cavity 2. The contact terminals 22 and 23 are supported by the circuit board 21 at fulcrums Pl and P2, respectively. When the battery holder 1 S 3 is received in the cavity 2, the hole 31 of the holder 3 aligns with the contact terminals 22 and 23. The fulcrums Pl and P2 are each implemented by a conductive resilient member. The contact terminal 24 to contact the positive electrode side of the battery Bl is supported by the circuit board 21 at a fulcrum 2 0 P3 which is also implemented by a conductive resilient member.
The reference numeral 25 designates a retaining spring for retaining the battery holder 3.
As shown in FIG. 3, to load the pager 1 with the primary battery Bl, the battery Bl is set in the battery holder 3. Then, 2 S the battery holder 3 is inserted into the cavity 2, as shown in --8- 21~9~0~
FIG. 6A. In this condition, the resilient contact terminals 22 and 23 contact the negative electrode side of the battery Bl through the hole 31 of the battery holder 3, while the resilient contact terminal 24 contacts the positive electrode side of the 5 battery B l . As a result, a ground signal appears on the contact terminal 22 and informs the CPU 17 of the fact that the battery Bl has been correctly mounted in the pager 1. The battery B
feeds power to the load circuit 12 via the contact terminal 24.
With the embodiment described above, it is not necessary 1 0 to provide the primary battery B1 with the conventional conductive portion 110, FIG. 1. Moreover, since the CPU 17 determines whether or not the battery B1 is present in response to a ground signal received via the contact terminal 22, faulty detection of the battery B 1 is eliminated which would 1 5 otherwise be caused by the fall of the output voltage of the battery B 1 attributed to the load circuit 12.
Further, as shown in FIG. 6B, the embodiment is configured such that when the battery holder 3 is inserted into the cavity 2 upside down, none of the contact terminals 22, 23 and 24 2 0 contacts the battery B1.
In summary, it will be seen that the present invention provides a battery detecting device which makes it ~-nn~cess~ry to provide a primary battery with an extra member for electric conduction and which can detect the presence of a battery with certainty on the 2 5 basis of a ground signal, independent of the load current. In addition, the A
device of the present invention is inexpensive and vibration-resistant.
. :
,
Referring to FIG. 3, an electronic apparatus to which a battery detecting device embodying the present invention is 1 0 applicable is shown and implemented as a radio pager 1 by way of example. As shown, the pager 1 has a battery holder 3 loaded with a thin disk-like primary battery Bl, and a cavity 2 for receiving the battery holder 3.
FIG. 4 shows the circuit arrangement of the embodiment.
1 5 As shown, the primary battery Bl feeds power to a load circuit 12 and is complemented by a secondary battery B~. When the primary battery Bl is absent in the cavity 2, a boosting circuit 13 boosts the voltage of the secondary battery B2 and applies the boosted voltage to the load circuit 12. A contact terminal 2 0 24 contacts the positive electrode side of the primary battery Bl when the holder 3 is received in the cavity 2. A contact terminal 23 contacts the negative electrode side of the battery Bl at one end thereof and is connected to ground at the o t h e r end. A contact terminal 22 contacts the negative electrode s i d e 2 5 of the battery Bl at one end thereof. When a ground signal .~
~7~ 2109~6 appears on the other end of the contact terminal 22, a CPU 17 determines that the battery Bl has been set in the cavity 2 of the pager 1. There are also included in the circuitry a capacitor Cl for eliminating chattering when the battery Bl is inserted S into the cavity 2, and a pull-up resistor Rl.
FIGS. 5A, SB, 6A and 6B show the configurations of the cavity 2 and battery holder 3 specifically. As shown, the battery holder 3 is formed with a rectangular hole 31 in a part thereof where the primary battery Bl will be positioned. The 1 0 hole 31 allows the contact terminals 22 and 23 to contact the negative electrode side of the battery Bl therethrough. A
printed circuit board 21 is fixed in place in the cavity 2. The contact terminals 22 and 23 are supported by the circuit board 21 at fulcrums Pl and P2, respectively. When the battery holder 1 S 3 is received in the cavity 2, the hole 31 of the holder 3 aligns with the contact terminals 22 and 23. The fulcrums Pl and P2 are each implemented by a conductive resilient member. The contact terminal 24 to contact the positive electrode side of the battery Bl is supported by the circuit board 21 at a fulcrum 2 0 P3 which is also implemented by a conductive resilient member.
The reference numeral 25 designates a retaining spring for retaining the battery holder 3.
As shown in FIG. 3, to load the pager 1 with the primary battery Bl, the battery Bl is set in the battery holder 3. Then, 2 S the battery holder 3 is inserted into the cavity 2, as shown in --8- 21~9~0~
FIG. 6A. In this condition, the resilient contact terminals 22 and 23 contact the negative electrode side of the battery Bl through the hole 31 of the battery holder 3, while the resilient contact terminal 24 contacts the positive electrode side of the 5 battery B l . As a result, a ground signal appears on the contact terminal 22 and informs the CPU 17 of the fact that the battery Bl has been correctly mounted in the pager 1. The battery B
feeds power to the load circuit 12 via the contact terminal 24.
With the embodiment described above, it is not necessary 1 0 to provide the primary battery B1 with the conventional conductive portion 110, FIG. 1. Moreover, since the CPU 17 determines whether or not the battery B1 is present in response to a ground signal received via the contact terminal 22, faulty detection of the battery B 1 is eliminated which would 1 5 otherwise be caused by the fall of the output voltage of the battery B 1 attributed to the load circuit 12.
Further, as shown in FIG. 6B, the embodiment is configured such that when the battery holder 3 is inserted into the cavity 2 upside down, none of the contact terminals 22, 23 and 24 2 0 contacts the battery B1.
In summary, it will be seen that the present invention provides a battery detecting device which makes it ~-nn~cess~ry to provide a primary battery with an extra member for electric conduction and which can detect the presence of a battery with certainty on the 2 5 basis of a ground signal, independent of the load current. In addition, the A
device of the present invention is inexpensive and vibration-resistant.
. :
,
Claims (3)
1. A device for detecting a thin disk-like primary battery which feeds power to a load circuit, comprising:
a secondary battery complementary to said primary battery;
a receiving portion for receiving said primary battery and comprising a first contact terminal for contacting a positive electrode side of said primary battery, a second contact terminal for contacting a negative electrode side of said primary battery at one end and connected to ground at the other end, and a third contact terminal contacting said negative electrode side of said primary battery at one end; and detecting means for determining, when said primary battery is inserted in said receiving portion in a predetermined orientation, that said primary battery is present on the basis of contact of said second and third contact terminals via said negative electrode side of said primary battery.
a secondary battery complementary to said primary battery;
a receiving portion for receiving said primary battery and comprising a first contact terminal for contacting a positive electrode side of said primary battery, a second contact terminal for contacting a negative electrode side of said primary battery at one end and connected to ground at the other end, and a third contact terminal contacting said negative electrode side of said primary battery at one end; and detecting means for determining, when said primary battery is inserted in said receiving portion in a predetermined orientation, that said primary battery is present on the basis of contact of said second and third contact terminals via said negative electrode side of said primary battery.
2. A device as claimed in claim 1, wherein said first, second and third contact terminals each comprises a conductive resilient member.
3. A device as claimed in claim 1, wherein said detecting means comprises a circuit for preventing chattering from being caused by said first, second and third contact terminals when said primary battery is inserted into said receiving portion.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4-291004(JP) | 1992-10-29 | ||
| JP4291004A JP2500088B2 (en) | 1992-10-29 | 1992-10-29 | Battery presence detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2109406A1 CA2109406A1 (en) | 1994-04-30 |
| CA2109406C true CA2109406C (en) | 1997-05-06 |
Family
ID=17763218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002109406A Expired - Fee Related CA2109406C (en) | 1992-10-29 | 1993-10-27 | Battery detecting device for a radio pager |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6104303A (en) |
| EP (1) | EP0595327B1 (en) |
| JP (1) | JP2500088B2 (en) |
| AU (1) | AU663626B2 (en) |
| CA (1) | CA2109406C (en) |
| DE (1) | DE69329138T2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001118618A (en) * | 1999-10-18 | 2001-04-27 | Jst Mfg Co Ltd | connector |
| US8604748B2 (en) | 2010-04-27 | 2013-12-10 | St-Ericsson Sa | Methods and systems for detecting battery presence |
| EP2797200A1 (en) * | 2013-04-22 | 2014-10-29 | Sanofi-Aventis Deutschland GmbH | Apparatus with removable battery |
| KR101538063B1 (en) * | 2014-05-07 | 2015-07-22 | 주식회사 아이센스 | Battery detecting apparatus for portable medical device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3930889A (en) * | 1974-07-22 | 1976-01-06 | Bell & Howell Company | Multiple source battery-powered apparatus |
| US4645325A (en) * | 1984-06-04 | 1987-02-24 | Minolta Camera Kabushiki Kaisha | Electronic instrument which selectively receives different kinds of batteries |
| US4628243A (en) * | 1984-10-11 | 1986-12-09 | General Electric Company | Battery charging system having means for distinguishing between primary and secondary batteries |
| JPS63174285A (en) * | 1987-01-10 | 1988-07-18 | Kyushu Hitachi Maxell Ltd | Charging equipment |
| US4855781A (en) * | 1987-02-05 | 1989-08-08 | Konica Corporation | Camera with battery check circuit |
| US5182546A (en) * | 1988-02-12 | 1993-01-26 | Canon Kabushiki Kaisha | Electronic apparatus which can discriminate between different power sources which it uses |
| US5115182A (en) * | 1990-04-23 | 1992-05-19 | Motorola, Inc. | Battery charging controller for a battery powered device and method for using the same |
| JP2940094B2 (en) * | 1990-07-25 | 1999-08-25 | ソニー株式会社 | Charging device |
| JP2818508B2 (en) * | 1991-10-29 | 1998-10-30 | 日本電気株式会社 | Small portable electronic devices |
-
1992
- 1992-10-29 JP JP4291004A patent/JP2500088B2/en not_active Expired - Fee Related
-
1993
- 1993-10-27 CA CA002109406A patent/CA2109406C/en not_active Expired - Fee Related
- 1993-10-28 EP EP93117512A patent/EP0595327B1/en not_active Expired - Lifetime
- 1993-10-28 AU AU50363/93A patent/AU663626B2/en not_active Ceased
- 1993-10-28 DE DE69329138T patent/DE69329138T2/en not_active Expired - Fee Related
-
1996
- 1996-03-11 US US08/613,020 patent/US6104303A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US6104303A (en) | 2000-08-15 |
| EP0595327A3 (en) | 1996-09-25 |
| EP0595327B1 (en) | 2000-08-02 |
| DE69329138T2 (en) | 2001-01-11 |
| CA2109406A1 (en) | 1994-04-30 |
| JP2500088B2 (en) | 1996-05-29 |
| AU5036393A (en) | 1994-05-12 |
| EP0595327A2 (en) | 1994-05-04 |
| JPH06197460A (en) | 1994-07-15 |
| DE69329138D1 (en) | 2000-09-07 |
| AU663626B2 (en) | 1995-10-12 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |