CN201079482Y

CN201079482Y - Hand warmer

Info

Publication number: CN201079482Y
Application number: CNU2008200005306U
Authority: CN
Inventors: 梁池雄
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-16
Filing date: 2008-01-16
Publication date: 2008-07-02
Anticipated expiration: 2018-01-16

Abstract

The utility model discloses a hand warmer, comprising an accumulator used for charging / discharging. The accumulator is connected with a PTC and a heat-conducting metal shell and is also connected with a control circuit; the control circuit is connected with an option switch used for sending a heating signal; after the heating signal is received, the circuit connection of the PTC and the accumulator is conducted; after identifying the input / output power supply interface on a USB interface connected with the accumulator, the control circuit controls the accumulator to charge / discharge. The hand warmer of the utility model can realize the functions of heating and warming hands, but also can realize common use with electronic equipment. When the electric power of the electronic equipment is used up, the hand warmer can realize the function of charging for the electronic equipment, avoids the trouble in incapable use of other electronic equipment due to the electricity failure.

Description

A kind of hand warmer

Technical field

This utility model relates to electronic technology field, is meant a kind of hand warmer especially.

Background technology

In daily life, after cold that weather becomes, temperature can be very low., because heating system is arranged, can not feel cold indoors, if go out to not have heating system or the lower space of temperature, the skin of hands is exposed in the air, can feel cold for a long time.For this reason, the someone has proposed the scheme of hand warmer.

Present hand warmer just has simple charging back heat release function, and the user uses in the process of hand warmer, sometimes also at the electronic equipment that uses other, as MP3, palm PC, mobile phone etc., because hand warmer does not generally have the function to the electronic equipment charging, in the common use of these electronic equipments and hand warmer, if power drain, and can't use battery in the hand warmer, thereby causing continuing uses.

The utility model content

In view of this, this utility model is to provide a kind of hand warmer, can not be to the problem of electronic equipment charging to solve above-mentioned hand warmer.

For addressing the above problem, this utility model provides a kind of hand warmer, the accumulator that comprises charge/discharge, described accumulator connects PTC and heat conductive metal shell, it is characterized in that, described accumulator connects control circuit, and described control circuit connects and sends the selector switch that heats signal, receive heat signal after the described PTC of conducting be connected with the circuit of accumulator; After described control circuit identifies accumulator and connects I/O power interface on the USB interface, the charge/discharge of control accumulator.

Wherein, also comprise the display lamp that is connected and shows current electric quantity with described accumulator.

Wherein, described control circuit comprises the single-chip microcomputer that connects holding circuit, and described single-chip microcomputer connects the transformator of regulating the accumulator input/output voltage.

Wherein, also have the gear of the described accumulator of control to PTC output voltage size on the described single-chip microcomputer, described gear is connected with described selector switch.

Hand warmer in this utility model, not only can realize the generating heat function of warm hands is in the time of also can being embodied as electronic equipment and using jointly, if the power drain of electronic equipment, can realize function, exempt the trouble and worry that the user uses other electronic equipment can't use because of outage to the electronic equipment charging.

Description of drawings

Fig. 1 is the structure chart of preferred embodiment;

Fig. 2 A is the structure chart of control circuit among the embodiment;

Fig. 2 B is the structure chart of control circuit among the embodiment;

Fig. 3 is the sketch map of Fig. 2 A, Fig. 2 B splicing.

The specific embodiment

For clearly demonstrating the hand warmer in this utility model, provide preferred embodiment below and be described with reference to the accompanying drawings.

Referring to Fig. 1, in this embodiment, hand warmer comprises: by connecting the accumulator that USB interface realizes charge/discharge, described accumulator connects the control circuit of realizing charge/discharge control, described control circuit connects the selector switch that transmits control signal, and selector switch is by control circuit, after the control battery discharging, accumulator realizes heat release by critesistor (PTC) element that connects, and heat is conducted on the metal shell of connection.

Hand warmer also can comprise display lamp, is connected with control circuit, and after selecting switch to select different gears, display lamp shows with different cycles light.Display lamp can be a different shape such as circular, square.

The selector switch of hand warmer also can be selected different gears, to realize regulating the different temperatures of PTC.Under the situation that the non-transformer output lead inserts, select different gears, as the low temperature gear, device enters the low temperature febrile state.Display lamp brightens gradually, after deepening gradually, the cycle changes; After selecting the high temperature gear, enter the high temperature febrile state.Whole display lamp brightens gradually, after deepening gradually, the cycle changes; Select off-mode, display lamp shows that dump energy goes out after the several seconds entirely.

Accumulator in the hand warmer can realize charging by the USB interface that USB interface connects the electronic equipments such as USB interface, video disc player of computer, and during charging, display lamp is bright, and after charging finished, display lamp extinguished; Can export dedicated line by external various power supply by USB interface, after the control circuit identification, accumulator enters the power supply output state, externally exports electric energy continually.Can export different voltages by the translation interface that different power supply output lines is installed, in order to satisfy the equipment of different voltage requirements, as MP3, palm PC etc.

When realizing charge/discharge, realize by the single-chip microcomputer U2 in the control circuit in the hand warmer, shown in Fig. 2 B, be the circuit diagram of clear expression control circuit, the circuit diagram of control circuit is divided into two of two Fig. 2 A, Fig. 2 B along dotted line, and Fig. 3 is the sketch map of Fig. 2 A, Fig. 2 B splicing.Single-chip microcomputer constantly detects the equipment that connects on the USB interface, if after detecting the input power interface, then controls accumulator and realizes charging; If after detecting the out-put supply interface, then control accumulator and realize external electronic equipment charging.

U4 in the control circuit is the holding circuit of hand warmer, and U6 is a transformator, can be as required the output voltage of accumulator be adjusted to the given voltage value.

In the hand warmer work process, as to the charging of other electronic equipment or when realizing the warm hands function of heat release, display lamp can constantly show dump energy, display lamp is optional uses up annular ring of light lamp, single-chip microcomputer in the control circuit is realized corresponding show state by the electric energy control display lamp that detects accumulator, as dump energy is 100% o'clock of Full Charge Capacity, the bright lamp of the whole ring of light; Dump energy is 75% o'clock of Full Charge Capacity, the bright lamp of 3/4 ring of light; Dump energy is 50% o'clock of Full Charge Capacity, the bright lamp of 1/2 ring of light; Dump energy is 25% o'clock of Full Charge Capacity, the bright lamp of 1/4 ring of light.

For the hand warmer of being set forth among each embodiment of this utility model, all within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims

1. hand warmer, the accumulator that comprises charge/discharge, described accumulator connects PTC and heat conductive metal shell, it is characterized in that, described accumulator connects control circuit, described control circuit connects and sends the selector switch that heats signal, receive heat signal after the described PTC of conducting be connected with the circuit of accumulator; After described control circuit identifies accumulator and connects I/O power interface on the USB interface, the charge/discharge of control accumulator.

2. hand warmer according to claim 1 is characterized in that, also comprises the display lamp that is connected and shows current electric quantity with described accumulator.

3. hand warmer according to claim 1 is characterized in that described control circuit comprises the single-chip microcomputer that connects holding circuit, and described single-chip microcomputer connects the transformator of regulating the accumulator input/output voltage.

4. hand warmer according to claim 3 is characterized in that, also has the gear of the described accumulator of control to PTC output voltage size on the described single-chip microcomputer, and described gear is connected with described selector switch.