DE29812606U1 - Cell phone cell with AC / DC recharging - Google Patents

Description

Patent attorneys

Abitz& Partner &Iacgr; ?».X-?Xa*

Poschingerstr. b .:....· ·..· : ..··..·

PO Box 86 01 09
81628 Munich

31956/PT7-127

Cellular phone cell with AC/DC recharge Summary:

This invention is a kind of "AC/DC recharging type mobile phone cell". A charger is installed in a case composed of a front panel and a rear case body. The front panel has a hollow receptacle capable of holding a plastic plug body that can be raised and positioned. It causes the rear end of the electrical plug portion of the plug to press firmly against the elastic conductive portion. Consequently, the conduction property is improved. A two-color LED and the rechargeable cells are connected through the charging circuit. When the charging voltage is lower than a reference voltage, the red light of the two-color LED lights up. When the cells are fully charged, the green light of the two-color LED lights up, and a low potential is output from an analog integrated circuit to an optical coupling switch to stop charging. And consequently, energy is saved and the life of the cell is prolonged.

Explanations of the invention:

Background of the invention:
3.0

[A brief introduction to invention technology]

This invention is a type of "AC/DC recharging cell", particularly a cell that can be directly recharged by commercial mains power or can be recharged by a conventional AC/DC charger that

2
is commercially available.

To charge a conventional cell phone cell to replenish the energy used, a charger must be used. For this reason, the user has to buy an extra charger and pay more money. In addition, the charger is too big and heavy and cumbersome to carry.

[A brief introduction to earlier technology]

Because of these disadvantages, manufacturers have improved it. As shown in Fig. 1, the rechargeable cell is composed of a housing 10 and a charger, etc. A hollow receptacle 13 with two slots on its right and left sides is mounted on the front panel 12 of the housing 10 to hold a pivotable and positionable plug 15. The plug 15 has two forwardly extending electrical plugs 16 and a conductive support shaft 17 connecting the electrical plugs 16 transversely. Left and right conductive plates with slots are mounted on the circuit board 11 of the charger to grip the conductive support shaft 17 of the plug 15. Then, the commercial mains power (AC) can be supplied to the charger through the electrical plugs 16, the conductive support shaft 17 and the conductive plate 18 of the plug 15. But this construction of the conductive support shaft 17 increases the current resistance; moreover, the contacts between the conductive support shaft 17 and the conductive plates 18 of the circuit board 11 are in the form of a quick coupling, which does not make a stable contact.

In addition, both when the connector 15 is swung up and positioned and swung back and housed, the conductive support shaft 17 is not detached from the conductive plate, it always causes abrasion and leads to a reduction in the conductivity. Moreover, because the positioning of the conductive support shaft 17 of the connector 15 on the stable arrangement of the circuit board 11 and the support of the conductive

Plate 18 is based on, loosening always occurs. This is not an ideal structure for a company.

Another inadequacy is: the connector 15 is the AC input terminal of the charger. After rectification, filtering and stabilization, the AC is converted into DC to drive the transformer and the charging circuit through a control circuit consisting of transistors. The DC is used to charge the rechargeable cell 19 on the one hand, and on the other hand, it supplies power to the mobile phone through the DC output terminals of the front panel 12. When the cells are fully charged, the charger cannot automatically turn off the control circuit. It will result in energy waste and shortening of the life of the circuit and the cells 19. Another problem is that there is no indication of full charge and no overheating protection for the cells 19.

Because of the disadvantages of the existing rechargeable cell phone, I looked for a new way to solve these problems and finally completed the invention "Cell phone cell with AC/DC recharge".

The object of this invention is to provide an "AC/DC recharging type mobile phone cell". Its plastic axis of the plug is held between the hollow receptacle of the front panel and the rear housing body, causing the electrical plug portion of the plug to press firmly on the elastic conductive parts of the charger circuit board. When the plug is swung back and housed, the electrical plug portions are released from the elastic conductive parts. It can be assembled quickly and stably as a whole. It is durable and its conduction property is improved.

Another object of this invention is to provide a "mobile phone cell with AC/DC recharging". A pivotable and positionable plug is placed on the back of the housing body, thereby enabling the rechargeable cell to be charged directly from the commercial mains power without detaching from the mobile phone.

The third object of the invention is to provide a "mobile phone cell with AC/DC recharging". A bicolor LED, a temperature sensitive resistor and the rechargeable cells are connected in parallel across the charging circuit. When the charging voltage is lower than the reference voltage, the red light of the bicolor LED lights up. When the cells are fully charged, the green light of the bicolor LED lights up, and a low potential is output from an analog integrated circuit to an optical coupling switch to stop the recharging. Accordingly, energy is saved, 0 and the life of the cell is prolonged.

For the purpose of evaluation, a practical example with illustrations is presented in detail as follows to explain how to realize the above objective using technology measures.

[Explanation of the figures]

Fig. 1: Partial view of a common rechargeable mobile phone cell. Fig. 2: Appearance of my invention. Fig. 3: Partial view of Fig. 2. Fig. 4: Partial view showing that the plug (in Fig. 2) has been swung up and positioned.

Fig. 5: Sectional view showing that the plug (in Fig. 4) has been pivoted up and positioned.

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Fig. 6: Side view of Fig.

Fig. 7: Shows that the plug in Fig. 6 has been swung back and stored.

Fig. 8: Block diagram of the charger of this invention. Fig. 9: Circuit diagram of Fig.

Fig. 10: Appearance of another practical example of this invention.

[Explanation of the parts] 10

20 Front panel

21 rear housing body

22 hollow recording

23 Side wall 24 Side wall

25 Slot

26 Carrier plate

27 Carrier plate

28 Slot

29 light window 210 rear housing body 220 hollow housing

30 plugs

31 Plastic body 32 Carrier axis

33 Carrier axle

34 electrical plug-in part

35 electrical plug-in part

40 elastic power supply part 41 elastic power supply part 42 elastic charging part

50 circuit board

51 elastic conductive part

52 elastic conductive part

60 AC input connector

61 Rectifier circuit

62 Filter circuit

63 Voltage stabilization circuit

64 Control circuit

65 Charging circuit

66 Overheating protection circuit
67 rechargeable battery

68 DC output connector

69 DC input connector

As shown in Fig. 2, the invention "mobile phone cell with AC/DC recharging" is mainly a rechargeable mobile phone cell which can be directly charged by commercial power (generally AC 110-240V). A charger is fixedly arranged in a case, and a space of a hollow receptacle 22 is formed on the front face of the front panel 20 of the case for holding the plug 30 (can be either swung up and positioned or swung back and housed) which is used for direct charging with the commercial power.

As shown in Fig. 3, the rechargeable cell case is composed of the front plate 20 and the rear case body 21 by joining them by high frequency fusion. A space of a hollow receptacle 22 is formed on the front face of the front plate 20. Slots are respectively formed at the rear ends of the left and right side walls 23, 24 of the hollow receptacle 22 to receive the left and right sections of the plastic support shaft 32, 33 of the plastic body 31 of the connector 30.

The left and right electrical plug-in parts 34, 35 of the plug pass through the plastic body 31 (longer at the front, shorter at the back). A pair of plastic support plates 26, 27 are arranged on the inside of the rear housing body opposite each other, one on the left side, the other on the right side. The plastic support plates engage the support axis 32, 33 of the plug with their slots 28, which are at the front end of the

Plates are arranged to enable the plug 30 to be pivoted up about the axis and positioned or pivoted back and housed.

The charger circuit board 50 and the rechargeable cells 67 are fixedly mounted in the rechargeable cell housing. Two resilient conductive members 51, 52 projecting from the circuit board 50 are used as AC input terminals. The rear ends of the electrical male members 34, 35 of the plug 30 are resiliently pressed onto the members 51, 52. Figures 4, 5, 6 show that the plug 30 is in a raised and positioned position. The plastic body 31 of the plug 30 conforms to the left and right walls 23, 24 of the hollow receptacle 22. The plastic support shaft 32, 33 is gripped and held by a support plate 26, 27 and its slots 25, 28 of the same material. This process can reduce the electrical resistance, improve the power conduction property, as a result, the alternating current can flow smoothly into the charger through the electrical plug-in parts 34, 35 of the connector 30 and elastic conductive parts 51, 52. In addition, it is durable and can be assembled quickly and stably.

When the rechargeable cell does not need to be charged, the plug 30 can be swung back and stored in the space of the hollow receptacle 22 of the front plate 20 as shown in Fig. 7, then the rear ends of the electrical plug-in parts 34, 35 of the plug 30 are detached from the elastically conductive parts 51, 52 of the circuit board 50.

As shown in Fig. 8, AC mains power of 110-240 V flows into the AC input terminal 60 of the rechargeable cell, and then flows through the rectifier circuit 61, the filter circuit 62, the voltage stabilizing circuit 63, the control circuit 64 and the charging circuit 65 to charge the rechargeable cells 67.

When using a commercial charger, the charging current flows through the DC terminal 69 and the flexible charging member 42 (as shown in Fig. 3) into the rechargeable cells 67. When the rechargeable cells are fully charged, the DC current can be switched through its DC output terminal 68 and the conductive member 40 into the mobile phone as shown in Fig. 3.

Please refer to Fig. 9: The 110-240 V AC mains current flows into the AC input terminal 60 of the charger, is then rectified into DC by a bridge rectifier Dl of the rectifier circuit 61. The current limiting resistor Rl is used to limit the current within a certain range; the resistor R2 and the diode D2 together with the transistor Ql are used as a filter and together with a Zener diode D3 in the voltage stabilizing circuit provide a comparison reference voltage for the overcurrent protection circuit of the control circuit.

A circuit providing a suitable voltage to control the transistor Q2 is composed of a transistor Q1 and an optical coupler El. The rechargeable cells 67 are charged by the transformer T and the charging circuit 65. The charging circuit 65 is connected to the output terminal of the secondary winding of the transformer. The following elements are connected in parallel in the charging circuit 65: a two-color LED, a capacitor C4 connected in series with a diode D4, and the rechargeable cells 67. Through a Zener diode D5 and a resistor R7, an integrated analog circuit E2 is connected at the junction of the capacitor C4 and the diode D4 to provide a reference voltage. Another end of the integrated analog circuit E2 is connected to the crossover point of the two-color LED to compare the charging voltage with the reference voltage. While the voltage is lower than the reference voltage

·· ··♦♦

(the potential of pin #3 is lower than that of pin #2), the control circuit 64 is caused to operate and the rechargeable cells 67 are charged by the transformer T and the charging circuit 65. At the same time, the bicolor LED (refer to the light window 29 in Fig. 3) lights up in red color, indicating that charging is taking place. When the rechargeable cells are fully charged (the potential of pin #2 is lower than that of pin #3), the diode D4 becomes conductive and the bicolor LED lights up in green color. At the same time, a lower potential is output from the analog integrated circuit E2 to the optical switch IC(El) to turn off the transistor Q2 and stop charging. As a result, energy is saved and the life of the circuit and the cells is extended.

Two temperature sensitive resistors RIO, RlI of an overheat protection circuit 66 are connected in series with the rechargeable cells 67 before connecting them to the output terminals of the secondary side of the transformer T. As the temperature in the rechargeable cell 67 increases, the resistance of the temperature sensitive resistors RIO, RlI decreases accordingly, providing overheat protection to stop charging of the rechargeable cells.

As shown in Fig. 10, the hollow receptacle 220 is disposed on the back of the housing 210 to hold the plug 30, thereby causing the rechargeable cell to be charged by the commercial mains power without being detached from the mobile phone.

In summary, the "AC/DC recharging cell phone cell" is durable and can be assembled quickly and stably; its conductivity is greater than that of others; it is suitable for charging a standby cell phone; it has indicators,

* 0

to indicate the charging states (charging or fully charged); it can automatically stop charging, as a result of which the life of the circuits and rechargeable cells is extended. It can meet all requirements in practice. I hereby file an application for a novel invention.

1 List of reference symbols

10 Housing

11 Circuit board 12 Front panel

13 hollow recording

15 plugs

16 Insert part

17 Carrier axle

18 conductive plate

19 Cell

20 Front panel

21 rear housing body

22 hollow holder 23 side wall

24 Side wall

25 Slot

26 Carrier plate

27 Support plate 28 Slot

29 light windows

210 rear housing body 220 hollow housing

30 plugs

31 plastic bodies

32 Carrier axis

33 Carrier axle

34 electrical plug-in part

35 electrical plug-in part

40 elastic power supply part

41 elastic power supply part

42 elastic charging part

50 circuit board

51 elastic conductive part 52 elastic conductive part

60 AC input connector

61 Rectifier circuit

62 Filter circuit

63 Voltage stabilization circuit

64 Control circuit

65 Charging circuit

66 Overheating protection circuit

67 rechargeable battery

68 DC output connector

69 DC input terminal C4 Capacitor

Dl bridge rectifier

D2 Diode

D3 Zener diode

D4 Diode

D5 Zener diode

El optical coupling switch

E2 integrated analog circuit

Rl current limiting resistor

R2 resistance

R7 resistance RIO temperature sensitive resistance RlI temperature sensitive resistance

Ql Transistor

Q2 transistors

T Transformer

Claims (4)

&Rgr;&Tgr;7-127 CLAIMS 1 . A type of mobile telephone cell with AC/DC recharging, especially a type of mobile telephone cell that can be charged directly from the commercial mains electricity. Its structure includes: A housing: it is composed of a front panel (20) and a rear housing body (21). A hollow receptacle (22) is arranged on the front side of the front panel (20) to hold a pivotable and positionable connector (30). A charger: is installed in a housing; the alternating current is supplied through its alternating current input connector (60) and is then rectified, filtered and stabilized to drive a transformer (T) and a charging circuit (65) through a transistor control circuit (64) to charge the rechargeable cells (67) with direct current. Its direct current output connector (68) is connected to the elastic conductive members (40, 41) for supplying direct current to the mobile phone. It has the following characteristics: The plastic support shaft is extended at its two ends (32, 33) on the left and right sides of a plastic body (31) of the housing connector (30) to fit into the left and right slots (25) of the hollow receptacle (22) on the front panel (20). The extended ends (32, 33) are also gripped by the front slots (28) of the left and right support plates (26, 27) which are mounted opposite each other in the rear housing (21). The left and right electrical plugs (34, 35) pass through the plastic body (31). Two elastic conductive parts (51, 52) used as AC input terminals (60) extend from the circuit board (50) and press on the rear ends of the electrical plug parts (34, 35) of the raised plug (30). An optical coupling switch (El) is connected to the base of the transistor (Q2) of the control circuit (64) of the charger. Its charging circuit (65) is connected to the output terminal of the secondary winding of the transformer (T). The following elements are connected across the charging circuit (65): a bicolor LED, a capacitor (C4) connected in series with a diode (D4) and the rechargeable cells (67). An integrated analog circuit (E2) is connected at the junction point of the capacitor (C4) and the diode (D4) through a zener diode (D5) to provide a reference voltage. Another end of the integrated analog circuit (E2) is connected to the crossover point of the bicolor LED to compare the charging voltage with the reference voltage. While the voltage is lower than the reference voltage, the bicolor LED lights up in red color. When the rechargeable cells (67) are fully charged, the diode (D4) is conductive and the bicolor LED lights up in green color. At the same time, a lower potential is output from the integrated analog circuit (E2) to the optical switch (El) in order to switch off the transistor (Q2) in the control circuit (64). 2. Type of AC/DC recharging mobile phone cell as described in item 1 of the claims. The plug (30) on its housing can be swung back into and housed in the hollow receptacle (22) of the front plate (20). At the same time, the electrical plug-in part (34, 35) on the plug (30) is released from the elastic conductive part (51, 52) of the circuit board (50), whereby 3
its rear end points upwards. 3. Type of mobile telephone cell with AC/DC recharging as described in item 1 of the claims
The hollow housing (22) is arranged in the back of the housing to hold the plug (30), thus the mobile phone can be charged with the commercial mains power without removing it. 4. A type of mobile telephone cell with AC/DC recharging as described in item 1 of the claims
The rechargeable cells (67) are connected in series with a temperature sensitive resistor (RIO) before being connected to the secondary winding of the charger.