CN215174881U - Power supply wire and power supply device for lamp string - Google Patents

Abstract

The application provides a power supply line for a lamp string, which comprises two conducting wires and a switching circuit. The two wires extend from the first end to the second end. The switching circuit is provided with a normally open contact switch and a divider resistor, wherein the normally open contact switch is connected with the divider resistor in series and is electrically connected with the two leads. The normally open contact switch is used to be pressed repeatedly, so that the voltage division state between the two wires is changed to form a trigger signal combination.

Description

Power supply wire and power supply device for lamp string

Technical Field

The present application relates to a transformer, and more particularly, to a power supply line and a power supply device for a string of lights.

Background

The lamp string is a long linear lighting device formed by connecting a plurality of light emitting diodes in series, parallel or series/parallel in a mixed way.

The light string is driven by PWM power supplied by a transformer, and the brightness, the flicker change and the like of the light emitting diode in the light string can be changed through the adjustment of output voltage, frequency and duty ratio.

As shown in fig. 1, most of the conventional transformers are integrated into a single plug type, and are directly plugged into a household ac socket, and a control circuit is also disposed at the transformer end, for example, new patent US 9,781,781B 2. In the transformer including the control circuit, the control circuit and the transforming circuit are both installed in a housing of the transformer; the switch is welded and fixed on the circuit board and is exposed through the hole of the shell; a seal covers the aperture to seal the switch. The control circuit switches the output of the voltage transformation circuit through the pressing of the switch, and outputs the corresponding PWM power to the load end. In the transformer, the buttons are all integrated in the transformer with a single plug type, so that the arrangement positions of the function buttons are limited, and when a user operates the transformer to switch, the user needs to operate the transformer beside a household alternating current socket, and the electric shock crisis is easy to occur. In addition, the single plug type transformer is not easy to be designed to be waterproof, for example, US 9,781,781B2 covers the opening with a sealing member, but the sealing member may be required to be pressed repeatedly and easily damaged. That is, when the state of tide occurs, the transformer is prone to generate leakage condition, and the user is prone to receive electric shock when performing switching operation.

As shown in fig. 2, another design is to separately install the control circuit and the button on another housing to form an independent controller, and to install the controller in the middle of the power supply line or at any position. However, in this structure, an extra control signal line is required in addition to the original conductive line for transmitting power, and the control signal of the control circuit is transmitted to the transformer circuit, so that the overall wiring becomes complicated.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present invention provides a power supply line for a light string and a power supply device for changing a switching operation mode.

At least one embodiment of the present invention provides a power supply line for a light string, including two wires and a switching circuit. The two wires extend from the first end to the second end. The switching circuit is provided with a normally open contact switch and a divider resistor, wherein the normally open contact switch is connected with the divider resistor in series and is electrically connected with the two leads. The normally open contact switch is used to be pressed repeatedly, so that the voltage division state between the two wires is changed to form a trigger signal combination.

In at least one embodiment, the switching circuit is disposed at the first end or the second end.

In at least one embodiment, the power supply line for the light string includes two contact electrodes respectively connected to the two wires.

In at least one embodiment, the switching circuit is disposed between the first terminal and the second terminal.

In at least one embodiment, the power supply line for the light string further includes a set of bidirectional diodes connected in parallel in two directions and disposed on one of the two wires and between the voltage-dividing resistor and the second terminal.

At least one embodiment of the present invention further provides a power supply device for a light string, including the power supply line and the transformer. The transformer comprises a transformation circuit and a control circuit. The voltage transformation circuit is provided with an input end and an output end, the input end of the voltage transformation circuit receives external power and converts the external power into driving power, the driving power is output through the output end, and the first end of the power supply line is electrically connected to the output end. The control circuit is electrically connected with the voltage transformation circuit and is electrically connected with the two leads through the first end and the output end; the control circuit detects the voltage division state between the two wires and sends a switching signal to the voltage transformation circuit to change the driving power according to the voltage division state, the driving power is a pulse width modulation signal, and the switching signal is used for changing the duty ratio of the pulse width modulation signal.

In at least one embodiment, the transformer further includes a housing and at least two metal sheets, the transformer circuit and the control circuit are disposed in the housing, and the metal sheets protrude from the surface of the housing and are connected to the input terminal.

In at least one embodiment, the control circuit has a power management chip, a switching controller and a decoder; the switching controller is electrically connected with the power management chip and the decoder, and obtains working power from the power management chip; the decoder is connected with the two wires, the normally open contact switch is used for being repeatedly pressed to enable the voltage division state between the two wires to change to form a trigger signal combination, and the decoder is used for analyzing each trigger signal combination and transmitting corresponding information to the switching controller, so that the switching controller sends a switching signal to the voltage transformation circuit according to each trigger signal combination to change the driving power.

In at least one embodiment, the control circuit further comprises a remote control signal receiver connected to the switching controller; the remote control signal receiver is used for receiving a plurality of remote control selection signals and transmitting the remote control selection signals to the switching controller; each remote control selection signal corresponds to a switching mode, so that the switching controller sends out a switching signal to the transformer circuit to change the driving power.

In at least one embodiment, the transformer circuit further includes an inverter disposed corresponding to the input terminal for converting external power into dc power, and the power management chip is electrically connected to the inverter for stepping up and stepping down the dc power to output driving power.

In the present invention, the position of the switching circuit is shifted to the power supply line, and separated from the transformer. Therefore, the user does not need to operate on the transformer for switching the output of the transformer, and the danger of high-voltage electric shock is avoided. Meanwhile, the switching circuit can be easily provided with waterproof measures, such as coating with a plastic film or waterproof glue, so that the risk of electric leakage of the switching circuit due to dampness is reduced.

Drawings

FIG. 1 is a diagram of a power supply device for a light string in the prior art.

FIG. 2 is a diagram of another prior art power supply device for a string of lights.

FIG. 3 is a perspective view of a power supply line for a light string according to a first embodiment of the present invention.

FIG. 4 is a side view of the power supply wires for the light string according to the first embodiment of the present invention.

FIG. 5 is a block diagram of a power supply line for a light string according to a first embodiment of the present invention.

FIG. 6 is a block diagram of a power supply device for a light string according to a first embodiment of the present invention.

FIG. 7 is a block diagram of a power supply apparatus for a light string according to a second embodiment of the present invention.

FIG. 8 is a block diagram of a power supply device for a light string according to a third embodiment of the present invention.

FIG. 9 is a circuit diagram of a power supply device for a light string according to a fourth embodiment of the present invention.

Fig. 10 is a perspective view of a power supply line for a light string according to a fifth embodiment of the present invention.

Fig. 11 is a block diagram of a power supply device for a light string according to a fifth embodiment of the present invention.

Fig. 12 is a block diagram of a transformer according to one or more embodiments of the present invention.

Fig. 13 is a block diagram of a transformer according to one or more embodiments of the present invention.

Fig. 14 is a perspective view of a wire and a switching circuit in accordance with one or more embodiments of the present invention.

List of reference numerals

1 power supply device

100 power supply line

101 first end

102 second end

112, conducting wire

114 main body

116 contact electrode

118 switching circuit

120 bidirectional diode

300 transformer

301: socket

310 voltage transformation circuit

320 control circuit

311 input terminal

312 output terminal

313 current converter

314 power management chip

322 switching controller

324 decoder

325 remote control signal receiver

331: outer casing

332 metal sheet

400 light string

600 remote control signal emitter

SW normal open contact switch

R is a divider resistor

Ve external electric power

Vout drive power

Vcc operating power

112a insulating layer

118a piercing the terminal.

Detailed Description

Referring to fig. 3, fig. 4 and fig. 5, a power supply line 100 for a light string 400 according to a first embodiment of the present invention includes at least two wires 112, at least one body 114, at least two contact electrodes 116 and at least one switching circuit 118. The power supply line 100 has a first end 101 and a second end 102. The two conductive wires 112 extend from the first end 101 to the second end 102, respectively. The switching circuit 118 is disposed in the body 114, and the body 114 is disposed on the two conductive wires 112, such that the switching circuit 118 is electrically connected to the two conductive wires 112. The main body 114 and the switch circuit 118 may be located at the first end 101 or the second end 102, which does not exclude that the number of the main body 114 and the switch circuit 118 is two, and the main body 114 and the switch circuit 118 are respectively disposed at the first end 101 or the second end 102, or at any position between the first end 101 and the second end 102.

As shown in fig. 3, 4 and 5, the two contact electrodes 116 are at least partially disposed on the body 114, and the two contact electrodes 116 are respectively connected to the two wires 112 and exposed on the surface of the body 114, that is, the contact electrodes 116 and the body 114 are combined to form a male plug. In one embodiment, the contact electrode 116 is needle-shaped or sheet-shaped, and is partially embedded in the body 114, and the other portion protrudes from the surface of the body 114. In various embodiments, the contact electrode 116 is tubular and embedded in the body 114, and the opening of the hollow tubular space of the contact electrode 116 is located on the surface of the body 114.

As shown in fig. 5, the switching circuit 118 includes a normally open contact switch SW and a voltage dividing resistor R. The normally open contact switch SW may be, but is not limited to, a micro switch, a capacitive switch, or a membrane switch. The normally open contact switch SW is connected in series with the voltage dividing resistor R and electrically connected to the two wires 112. The normally open contact switch SW and the voltage dividing resistor R are disposed in the body 114, and the normally open contact switch SW is at least partially exposed on the surface of the body 114. The normally open contact switch SW is pressed to cause a voltage division between the two wires 112. The normally open contact switch SW is repeatedly pressed to change the voltage division state between the two wires 112 to form a trigger signal combination.

Referring to fig. 6, the first embodiment of the present invention further discloses a power supply apparatus 1 for a light string 400, which includes the aforementioned power supply line 100 and transformer 300.

As shown in fig. 6, the first end 101 of the lead 112 is connected to the transformer 300 through the body 114 and the contact electrode 116. The present invention does not preclude the provision of only one set of body 114 and contact electrode 116; for example, second end 102 is connected to light string 400 through body 114 and contact electrode 116, while first end 101 is directly connected to the circuitry of transformer 300 by soldering.

As shown in fig. 6, the transformer 300 includes a transforming circuit 310 and a control circuit 320. The transformer circuit 310 has an input terminal 311 and an output terminal 312. The transformer 310 receives external power Ve from an input terminal 311 and converts the external power Ve into driving power Vout, and the transformer 310 outputs the driving power Vout through an output terminal 312. The first end 101 of the power supply line 100 is electrically connected to the output end 312, and can output the driving power Vout to the second end 102 to drive the light string 400 to light. Specifically, the combination of the contact electrode 116 and the body forms a male plug, the output end 312 of the transformer 300 is provided with a socket 301, and the male plug can be directly plugged in the socket 301 to connect the power supply line 100 and the transformer 300.

As shown in fig. 6, the control circuit 320 is electrically connected to the transforming circuit 310 and the two conductive wires 112. The control circuit 320 detects a voltage division state between the two wires 112, and sends a switching signal to the transformer circuit 310 to change the driving power Vout according to the voltage division state.

As shown in fig. 6, the transformer 300 further includes a housing 331 and two or more metal sheets 332. The transformer circuit 310 and the control circuit 320 are disposed in the housing 331, and the metal plate 332 protrudes from the surface of the housing 331 and is connected to the input terminal 311. Specifically, the metal piece 332 is a pin of an ac power plug, and is inserted into an ac power outlet to receive household ac power as the external power Ve.

The driving power Vout may be a Pulse Width Modulation (PWM) signal, and is used to drive the string 400 to emit light. The control circuit 320 is used for controlling the transforming circuit 310 to change the frequency, bandwidth and PWM duty ratio of the driving power Vout, so as to adjust the average current outputted by the transforming circuit 310 and adjust the brightness of the light emitted by the string of lights 400.

In the present invention, the control circuit 320 periodically detects the voltage dividing state between the two wires 112 in a segmented manner, and the normally open switch SW is pressed, so that the voltage difference between the two wires 112 is reduced, and when the voltage dividing is formed at the two ends of the voltage dividing resistor R, it is regarded as receiving a trigger signal. The number of trigger times and the duration of trigger signals may form a combination of trigger signals in a coded pattern, so that the control circuit 320 sends a switching signal to the transformer circuit 310 to change the frequency, voltage and PWM duty ratio of the driving power Vout and adjust the brightness or flashing frequency of the light string 400. For example, a short press at a time increases the brightness of the light emitted by light string 400, a long press at a time decreases the brightness of the light emitted by light string 400, a long press plus a short press switches light string 400 to blink, a double long press switches light string 400 to blink, etc.

Referring to fig. 7, a power supply line 100 for a light string 400 according to a second embodiment of the present invention is shown, in the second embodiment, a switching circuit 118 is not disposed on a male plug (i.e. a combination of a body 114 and a contact electrode 116) of the power supply line 100, but another body 114 is disposed in a middle section of a conducting wire 112, and the switching circuit 118 is disposed on the one body 114, so that the switching circuit 118 is far away from a transformer 300. Therefore, the user can keep away from the transformer 300 for the switching operation of the output of the transformer 300, thereby avoiding the danger of high voltage electric shock.

Referring to fig. 8, a power supply line 100 for a light string 400 according to a third embodiment of the present invention is shown, in which the power supply line 100 has a plurality of switching circuits 118 and a plurality of bodies 114 disposed at any positions of the power supply line 100. The user can operate the switching circuit 118 at different positions, which increases the convenience of switching the output of the transformer 300.

Referring to fig. 9, a power supply line 100 for a light string 400 according to a fourth embodiment of the present invention is shown, in which the main body 114 and the two contact electrodes 116 are omitted, and only the two wires 112 and the switching circuit 118 are shown. The power supply of the fourth embodiment further includes a set of bidirectional diodes 120, which are connected in parallel in two directions and disposed on one of the two conductive wires 112, and are located between the voltage-dividing resistor R of the switching circuit 118 and the second end 102 (the light string 400). Since a constant voltage difference is formed between the diodes 120, when the normally open switch SW is pressed, the voltage difference/divided state of the first end 101 of the two wires 112 is constant, for example, the difference of 0.7V is maintained, so that the control circuit 320 can normally determine whether the normally open switch SW is pressed. Therefore, when the light string 400 has a condition, such as a local failure of the light string 400 or a current leakage of the light string 400, the voltage division state between the two wires 112 after the normally open contact switch SW is pressed is not affected, so that the voltage division state between the two wires 112 conducted through the voltage division resistor R is changed to maintain a fixed voltage difference. Thus, the situation of the string 400, which may cause the control circuit 320 of the transformer 300 to fail to determine or misdetermine, can be avoided.

Referring to fig. 10 and 11, a power supply line 100 for a light string 400 according to a fifth embodiment of the present invention includes a plurality of wires 112, at least one body 114, three contact electrodes 116, and at least one switching circuit 118. The fifth embodiment is different from the foregoing embodiments in that the number of the conductive wires 112 is not necessarily two, and may be three or more. The two wires 112 are used for transmitting power, the other wire 112 is only disposed in the body 114 and connected to one of the two wires 112 through the switching circuit 118, and the control circuit 320 detects a voltage drop caused by the pressing of the switching circuit 118.

As shown in fig. 12, in one or more embodiments, the transformer circuit 310 has an inverter 313 and a Power management chip 314(Power IC). The inverter 313 may be a winding set or a bridge rectifier circuit. The inverter 313 is configured corresponding to the input terminal 311 for converting the household alternating current as the external power Ve into direct current. The power management die 314 is electrically connected to the inverter 313 and is disposed corresponding to the output terminal 312. The power management chip 314 is used as a power switch and a buck-boost for the dc power to output the driving power Vout.

As shown in fig. 12, the control circuit 320 has a switching controller 322 and a decoder 324. The decoder 324 is connected to the two conductive wires 112, the switching controller 322 is electrically connected to the power management chip 314 and the decoder 324, and obtains the operating power Vcc from the inverter 313.

As shown in fig. 12, the decoder 324 is used for parsing the trigger signal combinations, for example, the number of triggers and the duration of the triggers can form the trigger signal combinations of the encoding type. The decoder 324 further transmits the corresponding information to the switching controller 322, so that the switching controller 322 loads the corresponding switching mode according to the trigger signal combination. According to the switching mode, the switching controller 322 sends a switching signal to the transforming circuit 310 to change the frequency, bandwidth or voltage of the driving power Vout, and adjust the brightness or flashing frequency of the light string 400.

Referring to FIG. 13, in one or more embodiments, the control circuit 320 further includes a remote control signal receiver 325 connected to the switching controller 322. The remote control signal receiver 325 is used for receiving a plurality of remote control selection signals sent by the remote control signal transmitter 600 and transmitting the remote control selection signals to the switching controller 322. Each remote control selection signal corresponds to a switching mode, so that the switching controller 322 sends a switching signal to the transforming circuit 310 to change the frequency, bandwidth or voltage of the driving power Vout, and adjust the brightness or flashing frequency of the light string 400.

Referring to fig. 14, in one or more embodiments, the surface of the conductive wire 112 is further coated with an insulating layer 112a, and the insulating layers 112a may be partially connected, so that the conductive wire 112 becomes an encapsulated wire. The switching circuit 118 further includes two piercing terminals 118a electrically connected to the normally open contact switch SW and the voltage dividing resistor R, respectively, and protruding from the body 114. The piercing terminal 118a is used for piercing the insulating layer 112a, such that the piercing terminal 118a contacts two of the plurality of conductive wires 112, and the switching circuit 118 is electrically connected to the two conductive wires 112. Therefore, according to the structure shown in fig. 14, the user can install the switching circuit 118 at any position of the conductive line 112 according to the requirement, or add the switching circuit 118 according to the requirement, without being limited to the installation position at the time of departure.

In the present invention, the position of the switching circuit 118 is moved to the power supply line 100 and separated from the transformer 300. Therefore, the user does not need to operate the transformer 300 for switching the output of the transformer 300, thereby avoiding the danger of high-voltage electric shock. Meanwhile, the switching circuit 118 can be easily provided with a waterproof measure, such as being covered by a plastic film or a waterproof adhesive, so as to reduce the risk of electric leakage of the switching circuit 118 due to moisture.

Claims (10)

1. A power supply wire for a light string, comprising:

the two wires extend from the first end to the second end; and

and the switching circuit is provided with a normally open contact switch and a divider resistor, wherein the normally open contact switch is connected with the divider resistor in series and is electrically connected with the two leads.

2. The power supply line for light string of claim 1, wherein said switching circuit is disposed at said first end or said second end.

3. The power supply wire for light string of claim 2, further comprising two contact electrodes connected to said two wires, respectively.

4. The power supply wire for light string of claim 1, wherein said switching circuit is disposed between said first end and said second end.

5. The power supply line of claim 1 further comprising a set of bi-directional diodes connected in parallel and disposed on one of the two conductive lines and between the voltage divider resistor and the second terminal.

6. A power supply apparatus for a light string, comprising:

the power supply line of any one of claims 1 to 5; and

a transformer, comprising:

the power supply line comprises a voltage transformation circuit and a power supply control circuit, wherein the voltage transformation circuit is provided with an input end and an output end, the voltage transformation circuit receives external power from the input end and converts the external power into driving power, the driving power is output through the output end, and the first end of the power supply line is electrically connected to the output end; and

the control circuit is electrically connected to the voltage transformation circuit and is electrically connected to the two wires through the first end and the output end; the control circuit detects a voltage division state between the two wires and sends a switching signal to the voltage transformation circuit according to the voltage division state to change the driving power, wherein the driving power is a pulse width modulation signal, and the switching signal is used for changing the duty ratio of the pulse width modulation signal.

7. The power supply of claim 6 wherein said transformer further comprises a housing and at least two metal plates, said transformer circuit and said control circuit being disposed in said housing, said at least two metal plates protruding from a surface of said housing and being connected to said input terminal.

8. The power supply apparatus of claim 6 wherein:

the control circuit is provided with a power management chip, a switching controller and a decoder; the switching controller is electrically connected to the power management chip and the decoder, and obtains working power from the power management chip; the decoder is connected with the two wires, the normally open contact switch is used for being repeatedly pressed to enable the voltage division state between the two wires to change to form a trigger signal combination, and the decoder is used for analyzing the trigger signal combination and transmitting corresponding information to the switching controller, so that the switching controller sends a switching signal to the voltage transformation circuit according to the trigger signal combination to change the driving power.

9. The power supply apparatus of claim 8 wherein:

the control circuit further comprises a remote control signal receiver connected to the switching controller; the remote control signal receiver is used for receiving a plurality of remote control selection signals and transmitting the remote control selection signals to the switching controller; each remote control selection signal corresponds to a switching mode, so that the switching controller sends out the switching signal to the transformation circuit to change the driving power.

10. The power supply device as claimed in claim 8, wherein the transformer circuit further has an inverter corresponding to the input terminal for converting the external power into dc power, and the power management chip is electrically connected to the inverter for stepping up and stepping down the dc power to output the driving power.

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