CN212381432U - Reading lamp in public place - Google Patents

Abstract

The utility model discloses a reading lamp in public place, include: the device comprises a power supply end anode, a power supply end cathode, a divider resistor, a photosensitive resistor, a triode, a relay, a switch, a photoelectric coupler and an illuminating lamp; the positive electrode of the power supply end is respectively connected with one end of a divider resistor, one end of a coil of a relay, the movable end of the relay and a collector of a photoelectric coupler, and the other end of the divider resistor is respectively connected with one end of a photosensitive resistor and a base electrode of a triode; the coil other end of relay is connected with the collecting electrode of triode, the normally open end of relay is connected with the one end of switch, and the other end and the positive pole of optoelectronic coupler of switch are connected, and the projecting pole of optoelectronic coupler is connected with the positive pole of light, and the other end of photo resistance, the projecting pole of triode, the negative pole of optoelectronic coupler, the negative pole of light all are connected with the feed end negative pole. Through the scheme, the switch can be disabled when the environment is bright, and the problem that the illuminating lamp is randomly turned on to waste resources is avoided.

Description

Reading lamp in public place

Technical Field

The utility model relates to the technical field of lamps and lanterns, in particular to reading lamp in public place.

Background

For some public application scenarios, such as libraries, reading lights are provided that can help the reader to read. The existing reading lamp can be turned on under any condition, but in consideration of public welfare in public places, if the reading lamp is turned on under some conditions, resources are wasted.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a reading lamp in public place to solve one or more technical problem that exist among the prior art, provide a profitable selection or creation condition at least.

The utility model provides a solution of its technical problem is: a reading light for public places, comprising: the device comprises a power supply end anode, a power supply end cathode, a divider resistor, a photosensitive resistor, a triode, a relay, a switch, a photoelectric coupler and an illuminating lamp; the positive electrode of the power supply end is respectively connected with one end of a divider resistor, one end of a coil of a relay, the movable end of the relay and the collector of a photoelectric coupler, and the other end of the divider resistor is respectively connected with one end of a photosensitive resistor and the base of a triode; the utility model discloses a photoelectric coupler, including relay, triode, normally open end, photoelectric coupler, photo resistance, photoelectric coupler, the coil other end of relay is connected with the collecting electrode of triode, the normally open end of relay is connected with the one end of switch, the other end of switch is connected with photoelectric coupler's positive pole, photoelectric coupler's projecting pole is connected with the positive pole of light, photo resistance's the other end, the projecting pole of triode, photoelectric coupler's negative pole, the negative pole of light all are connected with the feed end negative pole.

Further, the switch is a mechanical control switch. The advantage of using a mechanical control switch is that the cost is low, and the cost of the whole reading lamp can be reduced.

Further, the switch is an electronic control switch. The advantage of using an electronically controlled switch is long life and high reliability. And is easy to be intelligently integrated.

Further, the electronic control switch is a touch switch.

Further, the triode is an NPN triode.

Further, the illuminating lamp is an LED lamp.

The utility model has the advantages that: a reading light for public places, comprising: the device comprises a power supply end anode, a power supply end cathode, a divider resistor, a photosensitive resistor, a triode, a relay, a switch, a photoelectric coupler and an illuminating lamp; the positive electrode of the power supply end is respectively connected with one end of a divider resistor, one end of a coil of a relay, the movable end of the relay and the collector of a photoelectric coupler, and the other end of the divider resistor is respectively connected with one end of a photosensitive resistor and the base of a triode; the utility model discloses a photoelectric coupler, including relay, triode, normally open end, photoelectric coupler, photo resistance, photoelectric coupler, the coil other end of relay is connected with the collecting electrode of triode, the normally open end of relay is connected with the one end of switch, the other end of switch is connected with photoelectric coupler's positive pole, photoelectric coupler's projecting pole is connected with the positive pole of light, photo resistance's the other end, the projecting pole of triode, photoelectric coupler's negative pole, the negative pole of light all are connected with the feed end negative pole. The brightness of the environment is judged through the photoresistor, and then the on and off of the switch are determined according to the brightness of the environment by utilizing the action of the triode and the relay. Therefore, when the environment is bright, the switch is disabled, and the problem that the illuminating lamp is randomly turned on to waste resources is avoided.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

Fig. 1 is a schematic diagram of the circuit connection structure of the reading lamp.

Detailed Description

The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention. In addition, all the coupling/connection relationships mentioned herein do not mean that the components are directly connected, but mean that a better coupling structure can be formed by adding or reducing coupling accessories according to specific implementation conditions. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.

Embodiment 1, with reference to fig. 1, a reading light for public use, comprising: a power supply terminal anode 101, a power supply terminal cathode 102, a voltage division resistor 110, a photoresistor 120, a triode 130, a relay 140, a switch 150, a photoelectric coupler 160 and an illuminating lamp 170; the positive electrode 101 of the power supply end is respectively connected with one end of a voltage-dividing resistor 110, one end of a coil of a relay 140, the movable end of the relay 140 and the collector of a photoelectric coupler 160, and the other end of the voltage-dividing resistor 110 is respectively connected with one end of a photosensitive resistor 120 and the base of a triode 130; the other end of the coil of the relay 140 is connected with the collector of the triode 130, the normally open end of the relay 140 is connected with one end of the switch 150, the other end of the switch 150 is connected with the anode of the photoelectric coupler 160, the emitter of the photoelectric coupler 160 is connected with the anode of the illuminating lamp 170, and the other end of the photoresistor 120, the emitter of the triode 130, the cathode of the photoelectric coupler 160 and the cathode of the illuminating lamp 170 are all connected with the cathode 102 of the power supply end.

When the reading lamp is operated, the photo-resistor 120 senses the brightness of the reading lamp environment and changes its resistance value according to the brightness. The method specifically comprises the following steps: when the ambient brightness is higher, the resistance of the photo resistor 120 is lower. The voltage dividing resistor 110 and the photo-resistor 120 form a voltage dividing circuit, for convenience of description, a junction of the photo-resistor 120 and the voltage dividing resistor 110 is defined as a node a, and the photo-resistor 120 changes a resistance value thereof, so as to change a voltage value of the node a. Since the node a is connected to the base of the transistor 130, the voltage value of the node a may affect the on and off of the transistor 130. Moreover, the voltage value of the node a is influenced by the resistance of the photo-resistor 120, and the resistance of the photo-resistor 120 is influenced by the brightness of the environment. Therefore, the on and off of the transistor 130 may be affected by the brightness of the environment. When transistor 130 is turned on, the coil of relay 140 is energized, and the moving terminal of relay 140 is connected to the normally open terminal. At this time, the function of the switch 150 is effective, and when the switch 150 is closed, the photocoupler 160 is triggered and the illumination lamp 170 is lighted; when the switch 150 is turned off, the photocoupler 160 is not activated and the illumination lamp 170 is extinguished. Based on the above concept, the decision of whether the function of the switch 150 is effective or not through the brightness value of the environment can be realized by selecting the appropriate photo resistor 120 and the voltage dividing resistor 110. This is achieved in that when the ambient brightness value is large, the function of the switch 150 is disabled, and the illumination lamp 170 cannot be turned on through the switch 150. Thus, when the reading lamp is in a public place, if the ambient brightness at the position is high, the illumination of the reading lamp is not needed, and the reading lamp is prevented from being turned on by people. When the ambient brightness is high, the resistance of the photo resistor 120 is reduced, the voltage of the node a is reduced, and when the voltage of the node a is less than the threshold voltage of the transistor 130, the transistor 130 is turned off, the relay 140 does not operate, and the switch 150 cannot be connected to the positive electrode 101 of the power supply terminal. Such that the failure of the switch 150, i.e., the opening or closing of the switch 150, does not affect the illumination lamp 170. Therefore, by deactivating the switch 150, the illumination lamp 170 is prevented from being unnecessarily lit. And common resources are saved. Of course, when the ambient brightness decreases, the resistance of the photo resistor 120 increases, so that the voltage of the node a increases, and when the voltage of the node a is greater than the threshold voltage of the transistor 130, the transistor 130 is turned on, the relay 140 is charged, and the moving end of the relay 140 is connected to the normally open end thereof. At this time, switch 150 can be connected to power supply terminal positive electrode 101, and the function of switch 150 is effective. When the switch 150 is closed, the photocoupler 160 is turned on to light the illumination lamp 170.

In some preferred embodiments, the switch 150 is a mechanically controlled switch. The mechanical control switch refers to a switch controlled by a mechanical structure, such as a ship-shaped switch and a tact switch. The advantage of using a mechanical control switch is that the cost is low, and the cost of the whole reading lamp can be reduced.

In some preferred embodiments, the switch 150 is an electronically controlled switch. The electronic control switch refers to a switch controlled by an electric signal, for example, a touch switch or a proximity switch using a capacitor. The advantage of using an electronically controlled switch is long life and high reliability. And is easy to be intelligently integrated. Wherein, in some preferred embodiments, the electronic control switch is a touch switch.

In some preferred embodiments, the transistor 130 is an NPN transistor. The illumination lamp 170 is an LED lamp.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and changes without departing from the spirit of the invention.

Claims (6)

1. A reading light for public use, comprising: the device comprises a power supply end anode, a power supply end cathode, a divider resistor, a photosensitive resistor, a triode, a relay, a switch, a photoelectric coupler and an illuminating lamp; the positive electrode of the power supply end is respectively connected with one end of a divider resistor, one end of a coil of a relay, the movable end of the relay and the collector of a photoelectric coupler, and the other end of the divider resistor is respectively connected with one end of a photosensitive resistor and the base of a triode; the utility model discloses a photoelectric coupler, including relay, triode, normally open end, photoelectric coupler, photo resistance, photoelectric coupler, the coil other end of relay is connected with the collecting electrode of triode, the normally open end of relay is connected with the one end of switch, the other end of switch is connected with photoelectric coupler's positive pole, photoelectric coupler's projecting pole is connected with the positive pole of light, photo resistance's the other end, the projecting pole of triode, photoelectric coupler's negative pole, the negative pole of light all are connected with the feed end negative pole.

2. A reading light for public use as claimed in claim 1, wherein the switch is a mechanically controlled switch.

3. A reading light for public use as claimed in claim 1, wherein the switch is an electronically controlled switch.

4. A reading light for public use as claimed in claim 3, wherein the electronically controlled switch is a touch switch.

5. The reading light of claim 1, wherein the transistor is an NPN transistor.

6. The reading lamp for public places of claim 1, wherein the illuminating lamp is an LED lamp.

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