CN212082659U

CN212082659U - Thermometer with lighting function

Info

Publication number: CN212082659U
Application number: CN202020887377.4U
Authority: CN
Inventors: 徐彦
Original assignee: Shenzhen Visiomed Technology Co ltd
Current assignee: Shenzhen Visiomed Technology Co ltd
Priority date: 2020-05-22
Filing date: 2020-05-22
Publication date: 2020-12-04
Anticipated expiration: 2030-05-22

Abstract

The utility model relates to a thermometer from area illumination function, it includes the thermometer body and sets up the lighting circuit on the thermometer body, lighting circuit includes rectifier circuit, the power E of coupling on rectifier circuit, the coupling is at a plurality of parallelly connected emitting diode LED1 of the power E two poles of the earth, switch K and load resistance R4 have concatenated between power E and the emitting diode LED3, emitting diode LED1 is used for the external illumination, switch K is toggle switch, emitting diode LED2 has been coupled on another contact of switch K, emitting diode LED 2's output is coupled to emitting diode LED 1's output for the lateral wall illumination of installing the battery. The utility model discloses have the illumination and to the effect that the power charges.

Description

Thermometer with lighting function

Technical Field

The utility model belongs to the technical field of medical equipment's technique and specifically relates to a thermometer from area illumination function is related to.

Background

The electronic thermometer can quickly and accurately measure the body temperature of a human body, has the advantages of convenient reading, short measuring time and high measuring precision compared with the traditional mercury glass thermometer, does not contain mercury, is harmless to the human body and the surrounding environment, and is particularly suitable for being used in places such as families, hospitals and the like.

The temperature measuring device of the electronic thermometer disclosed by the publication number CN1381711A comprises a temperature measuring head and a signal processing circuit, wherein the temperature measuring head is a semiconductor thermal diode; the device uses a semiconductor thermal diode as a temperature sensing element, and a temperature measuring head is connected by a standard socket and can rotate between 30 and 90 degrees for measuring the mouth temperature, the axillary temperature and the anal temperature.

Among the above-mentioned prior art scheme, it only has the circuit of temperature measurement, and the hospital can carry out the clinical thermometer to patient at night occasionally, when using night, need turn on the lamp, just can see the data on the clinical thermometer clearly, can influence patient's sleep like this, consequently needs a section clinical thermometer that has illumination function.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a from clinical thermometer of taking illumination function, it has the illumination and to the effect that the power charges to the not enough of prior art existence.

The above object of the present invention can be achieved by the following technical solutions:

the utility model provides a thermometer from area illumination function, includes the clinical thermometer body and sets up the lighting circuit on the clinical thermometer body, lighting circuit includes rectifier circuit, parallel coupling power E on the rectifier circuit positive negative pole, couple a plurality of parallelly connected emitting diode LED1 at the power E two poles of the earth, it has switch K and load resistance R4 to connect in series between power E and the emitting diode LED1, emitting diode LED1 is used for the external illumination.

By adopting the technical scheme, the switch K is switched on, so that the power supply is switched on with the loop of the light-emitting diode LED1, and the light emitted by the light-emitting diode LED1 plays a role in illumination; turning off the switch K, the light emitting diode LED1 is turned off; the rectifying circuit coupled with the two poles of the power supply E can convert alternating current into direct current through an external transformer, so that the power supply E can be charged.

The present invention may be further configured in a preferred embodiment as: the output end of the rectification circuit is connected with a voltage stabilizing circuit in parallel.

By adopting the technical scheme, the voltage stabilizing circuit connected in parallel on the rectifying circuit can limit the amplitude of the direct-current voltage output by the rectifying circuit, and prevent the electronic device from being damaged due to overhigh voltage.

The present invention may be further configured in a preferred embodiment as: the voltage stabilizing circuit comprises a voltage stabilizing diode VD and a current limiting resistor R1 coupled to the positive pole of the voltage stabilizing diode VD, the negative pole of the voltage stabilizing diode VD is coupled to the forward output end of the rectifying circuit, and the other end of the current limiting resistor R1 is coupled to the reverse output end of the rectifying circuit.

By adopting the technical scheme, after the voltage of the rectifying circuit is higher than the breakdown voltage of the voltage stabilizing diode VD, the diode is conducted, so that the current passes through the current limiting resistor R1 and the rectifying circuit-shaped loop, and when the voltage of the rectifying circuit is lower than the breakdown voltage of the voltage stabilizing diode VD, the voltage stabilizing diode is cut off, so that the output voltage of the rectifying circuit is more stable.

The present invention may be further configured in a preferred embodiment as: the positive pole and the negative pole of the rectifying circuit are coupled with a light emitting diode LED3 in parallel, and the negative pole of the light emitting diode LED3 is connected with a current limiting resistor R2 in series.

By adopting the technical scheme, when the rectifying circuit is connected with the commercial power through the transformer, the power supply E connected to the output end of the rectifying circuit is in a charging state, and the indicating light emitting diode LED3 connected to the output end of the rectifying circuit is electrified and shines, so that the charging indicating function can be played.

The present invention may be further configured in a preferred embodiment as: the diode D5 is coupled to a connection point of the light emitting diode LED3 and the rectifying circuit, the anode of the diode D5 is coupled to a connection point of the light emitting diode LED3 and the rectifying circuit, and the cathode of the diode D5 is coupled to the anode of the power supply E.

By adopting the technical scheme, the diode D5 can enable direct current output by the rectifying circuit to charge the power supply E through the diode D5 in the charging process; when the power supply E is in a non-charging state, the diode D5 is used to prevent the voltage of the power supply E from being applied to the light emitting diode LED3, so as to avoid the phenomenon that the light emitting diode LED3 is lighted during normal use to mislead the charging indication.

The present invention may be further configured in a preferred embodiment as: the switch K is a toggle switch, one end of the switch K is coupled to the anode of the power supply E, the other end of the switch K is provided with three contacts Ka, Kb and Kc respectively, and a Ka terminal is coupled to the anode of the light-emitting diode LED 1; the Kc terminal is coupled with a load resistor R3 and a light emitting diode LED2 which are connected in series, the anode of the light emitting diode LED2 is coupled to the load resistor R3, the cathode of the light emitting diode LED1 is coupled with the cathode of the LED2, and is coupled to the cathode of the power supply E; kb is an empty terminal.

By adopting the technical scheme, the switch K is shifted to the Ka end, and the light emitting diode LED1 is communicated with the power supply E and emits light, so that the LED can be used for illumination; when the switch K is turned to the end Kc, the light-emitting diode LED1 is disconnected with the power supply E, and the light-emitting diode LED2 is communicated with the power supply E and emits light to illuminate the battery mounting groove of the thermometer and prevent the reverse connection of the polarity of the battery during the installation; when the switch is toggled to the Kb end, the light emitting diodes LED1 and LED2 are both disconnected with the power supply E.

The present invention may be further configured in a preferred embodiment as: and an energy storage capacitor C2 is coupled in parallel at two ends of the power supply E.

Through adopting above-mentioned technical scheme, energy storage capacitor C2 is parallelly connected with power E, can be after dismantling power E's battery, energy storage capacitor C2 still can provide the power to emitting diode LED2, makes emitting diode LED2 continuously provide the illumination effect when being convenient for change the battery.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the lighting circuit arranged on the thermometer can enable the thermometer to have the lighting function, the switch K is switched on, the power supply is switched on with the loop of the light-emitting diode LED1, and the light-emitting diode LED1 emits light to play a role in lighting; turning off the switch K, the light emitting diode LED1 is turned off; the rectifying circuit coupled with the two poles of the power supply E can convert alternating current into direct current through an external transformer, so that the power supply E can be charged, and the power supply E can be used in a dark environment for the need from time to time;

2. the light emitting diode LED2 sets up on the battery cell wall of thermometer body, can provide the illumination to the battery cell wall, improves the polarity accuracy shape of installation battery, and a plurality of light emitting diode LED1 set up the outer tip at the thermometer, can be used to general illumination effect, and switch K is toggle switch simultaneously, is convenient for carry out on-off control to two way light emitting diode's electric current.

Drawings

Fig. 1 is a circuit diagram of the present invention.

Reference numerals: 1. a rectifying circuit; 2. a voltage stabilizing circuit.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses a from clinical thermometer of taking illumination function, including clinical thermometer body and the lighting circuit of setting on the clinical thermometer body, lighting circuit includes rectifier circuit 1, couples power E on rectifier circuit 1, couples the emitting diode LED3 at the power E two poles of the earth. The rectifying circuit 1 is formed by connecting four diodes D1-D4, the cathode of a diode D1 is connected with the anode of a diode D2 in a coupling mode, the cathode of a diode D3 is connected with the anode of a diode D4 in a coupling mode, the connection point of the diode D3 is used for being connected with a transformer power supply, the anodes of diodes D1 and D3 are connected in a coupling mode, and the cathodes of diodes D2 and D4 are connected in a coupling mode.

The connection point coupling of diode D2 and D4 is connected with voltage stabilizing circuit 2 and filter capacitor C1, voltage stabilizing circuit 2 includes zener diode VD and the current limiting resistor R1 who connects in series at zener diode VD anodal, zener diode VD's negative pole is coupled to the connection point of D2 and D4 in rectifier circuit 1, the other end of current limiting resistor R1 and the negative pole of filter capacitor C1 are coupled to the connection point of D1 and D3 in rectifier circuit 1, be used for stabilizing rectifier circuit 1's output voltage.

The output end of the rectifying circuit 1 is connected with the anode of a light emitting diode LED3 and the anode of a diode D5, the cathode of a light emitting diode LED3 is connected in series with a current limiting resistor R2, and the output end of the current limiting resistor R2 is coupled to the connection point of diodes D1 and D3 in the rectifying circuit 1. The cathode of the diode D5 is coupled to the anode of the power source E, and the cathode of the power source E is connected to the connection point of the diodes D1 and D3 in the rectifying circuit 1.

A switch K is coupled to a connection point of the power supply E and the diode D5, the switch K is a toggle switch, the other end of the switch K is provided with three endpoints, namely Ka, Kb and Kc, the endpoint Ka is connected with a current-limiting resistor R4, the output end of the current resistor R4 is connected in series with a plurality of light-emitting diodes (LEDs) 1 connected in parallel, the cathode of each light-emitting diode (LED) 1 is coupled to the cathode of the power supply E, and each light-emitting diode (LED) 1 is used for external illumination; the endpoint Kb is an empty terminal; the end point Kc is connected with a current limiting resistor R3 and a light emitting diode LED2 which are connected in series, the negative electrode of the light emitting diode LED2 is coupled to the negative electrode of the power supply E and used for providing an illumination effect on the wall of the groove of the thermometer body where the battery is installed and preventing the polarity from being reversed when the battery is installed; the energy storage capacitor C2 is coupled in parallel at the two ends of the power supply E, so that electric energy can be conveniently supplied to the light-emitting diode LED2 through the energy storage capacitor C2 when the battery is replaced, and the light-emitting diode LED2 can provide illumination for the battery clamping groove.

The implementation principle of the embodiment is as follows: in the charging process, the output end of the rectifying circuit 1 is connected with a mains supply through a transformer, the output end of the rectifying circuit 1 outputs fluctuating direct current, the voltage stabilizing circuit 2 and the filter capacitor C1 have the function of stabilizing the direct current, the direct current charges a power supply E through a diode D5, and the charging state of the power supply E is indicated through the light of a light emitting diode LED 3.

In use, diode D5 has the effect of blocking the passage of current from power source E, preventing it from passing through light emitting diode LED3 during normal use to cause it to illuminate; the switch K is switched to a Ka terminal, and the light-emitting diode LED1 is electrified and emits light for external illumination; the switch K is shifted to a Kb terminal, and the circuit is in a disconnected state; toggle switch K to the Kc terminal, emitting diode LED2 circular telegram is luminous, and power E and energy storage capacitor C2 provide the electric energy to emitting diode LED2 simultaneously, can provide the electric energy to emitting diode LED2 through energy storage capacitor C2 when changing the battery to illuminate the battery draw-in groove, guarantee the accuracy of polarity.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a thermometer from area illumination function which characterized in that: the thermometer comprises a thermometer body and an illuminating circuit arranged on the thermometer body, wherein the illuminating circuit comprises a rectifying circuit (1), a power supply E which is coupled to the positive electrode and the negative electrode of the rectifying circuit (1) in parallel, and a plurality of Light Emitting Diodes (LEDs) 1 which are coupled to the two electrodes of the power supply E in parallel, a switch K and a load resistor R4 are connected between the power supply E and a light emitting diode LED1 in series, and the light emitting diode LED1 is used for external illumination.

2. The thermometer with illumination function as claimed in claim 1, wherein: the output end of the rectifying circuit (1) is connected with a voltage stabilizing circuit (2) in parallel.

3. The thermometer with illumination function as claimed in claim 2, wherein: the voltage stabilizing circuit (2) comprises a voltage stabilizing diode VD and a current limiting resistor R1 coupled to the positive pole of the voltage stabilizing diode VD, the negative pole of the voltage stabilizing diode VD is coupled to the forward output end of the rectifying circuit (1), and the other end of the current limiting resistor R1 is coupled to the reverse output end of the rectifying circuit (1).

4. The thermometer with illumination function as claimed in claim 1, wherein: the positive electrode and the negative electrode of the rectifying circuit (1) are coupled with a light emitting diode LED3 in parallel, and the negative electrode of the light emitting diode LED3 is connected with a current limiting resistor R2 in series.

5. The thermometer with illumination function as claimed in claim 4, wherein: the diode D5 is coupled to a connection point of the light emitting diode LED3 and the rectifying circuit (1), the anode of the diode D5 is coupled to a connection point of the light emitting diode LED3 and the rectifying circuit (1), and the cathode of the diode D5 is coupled to the anode of the power supply E.

6. The thermometer with illumination function as claimed in claim 1, wherein: the switch K is a toggle switch, one end of the switch K is coupled to the anode of the power supply E, the other end of the switch K is provided with three contacts Ka, Kb and Kc respectively, and a Ka terminal is coupled to the anode of the light-emitting diode LED 1; the Kc terminal is coupled with a load resistor R3 and a light emitting diode LED2 which are connected in series, the anode of the light emitting diode LED2 is coupled to the load resistor R3, the cathode of the light emitting diode LED1 is coupled with the cathode of the LED2, and is coupled to the cathode of the power supply E; kb is an empty terminal.

7. The thermometer with illumination function as claimed in claim 1, wherein: and an energy storage capacitor C2 is coupled in parallel at two ends of the power supply E.