Wall-mounted countdown timer

Abstract

The utility model discloses a wall-mounted countdown timer, which comprises an outer cover, an upper shell and a lower shell, the lower shell is a square box body, guide surfaces are respectively arranged on two sides of the bottom surface of the lower shell, a plurality of air holes are arranged on the guide surfaces, a plurality of limiting ribs are symmetrically arranged on the side surface, extending upwards, of the guide surface in the lower shell, and the limiting ribs are arranged on the upper edge of the guide surface of the lower shell. The upper shell is fixedly arranged at the top end of the lower shell, the upper shell is provided with a panel, the panel is provided with an on-off key, a plurality of countdown keys and a plurality of indicator lamps, a window is formed in the center of the outer cover, and the panel penetrates through the window to enable the outer cover to cover the upper shell. The lower shell of the wall-mounted countdown timer is embedded in the wall, the upper shell and the panel are exposed out of the wall, the outer cover is simple and attractive, the countdown key can set time, and a user can conveniently turn off an output power supply at regular time.

Description

Technical Field

[0001] The utility model relates to the technical field of timing or timing devices, in particular to a wall-mounted countdown timer. Background Art

[0002] The countdown timer is a device designed based on timing. The user sets the time and the timer will alarm or stop when the set time is reached. The existing timing sockets can set the closing time. After the time is reached, the socket will be disconnected, realizing intelligent control of the socket's on and off.

[0003] In the smart home scenario, users often have the following needs: users need to turn off the power of a certain appliance or some appliances, but the user happens not to be at the scene; turning off the timer socket of a certain appliance can help users solve the problem, but turning off some appliances, such as when a user opens a store and needs to cut off all power before 8 o'clock in the evening, the timer socket is not suitable for this scenario, which requires a countdown timer to complete. Utility Model Content

[0004] The utility model aims to provide a wall-mounted countdown timer, wherein the lower shell of the wall-mounted countdown timer is buried inside the wall, the upper shell and the panel are exposed outside the wall, and the outer cover is simple and beautiful. The countdown key can set the time, so that the user can turn off the output power at a fixed time.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: a wall-mounted countdown timer, comprising an outer cover, an upper shell and a lower shell, the lower shell is a square box body, guide surfaces are respectively provided on both sides of the bottom surface of the lower shell, a plurality of air holes are provided on the guide surfaces, a plurality of limiting ribs are symmetrically provided on the side surfaces extending upward from the guide surfaces in the lower shell, the power board is limited and fixed on the limiting ribs, the upper shell is fixedly arranged on the top of the lower shell, the upper shell is provided with a panel, the panel is provided with an on / off key, a plurality of countdown keys and a plurality of indicator lights, a window is provided in the center of the outer cover, and the panel passes through the window so that the outer cover covers the upper shell.

[0006] The utility model is further configured as follows: a plurality of wiring terminals are arranged on one side of the power board facing the guide surface, and a power line hole is arranged on the guide surface.

[0007] The utility model is further configured as follows: the wiring terminals are a neutral terminal, a live terminal, a load terminal, and a ground terminal.

[0008] The utility model is further configured as follows: a plurality of buckle grooves are arranged on the side of the upper shell, a hanging buckle is arranged on the bottom surface of the outer cover corresponding to the buckle grooves, and the outer cover is buckled with the upper shell.

[0009] The utility model is further configured as follows: the switch key is arranged on the upper side of the panel, six countdown keys are provided, and the countdown keys are arranged in parallel on the panel.

[0010] The utility model is further configured as follows: the six countdown keys are respectively marked with words of 5min, 10min, 30min, 60min, 2hour and 4hour.

[0011] The utility model is further configured as follows: the power board is provided with a power module and an execution module, and the power module provides a DC power supply and an on-off power supply for the actuator.

[0012] The utility model is further configured as follows: the power module includes a rectifier bridge DB1, a capacitor C1, a resistor R1, a resistor R2, a capacitor C2, and a voltage regulator diode ZW1; the resistors R1 and R2 are connected in series to the input end of the rectifier bridge DB1; the capacitor C1 is connected in parallel to the resistor R2; the voltage regulator diode ZW1 and the capacitor C2 are respectively connected in parallel to the output end of the rectifier bridge DB1.

[0013] The utility model is further configured as follows: the execution module includes a relay JK1, a transistor Q1, a resistor R3 and a diode D1; the input end of the main circuit of the relay JK1 is connected to the live wire end; the output end of the main circuit of the relay JK1 is connected to the load end; one end of the trigger circuit of the relay JK1 is connected to a 12V voltage, and the other end is connected to the collector of the transistor Q1; the emitter of the transistor Q1 is grounded; the base of the transistor Q1 is connected to the resistor R3 and then to the signal point out; and the diode D1 is connected in parallel to the trigger circuit of the relay RE1.

[0014] The utility model is further configured as follows: a control board is arranged inside the panel, a control chip is arranged on the control board, and the control chip receives the switch key and the countdown key signal to run and output the control signal to drive the execution module and light up the indicator light.

[0015] The lower shell of the wall-mounted countdown timer of the utility model is buried inside the wall, and the upper shell and the panel are exposed outside the wall and are decorated with an outer cover. The countdown timer is simple and beautiful as a whole. The user can press the power button to directly turn on or off the countdown timer, or press the countdown button to set the time to cut off the output power supply at a fixed time. There is also an indicator light to indicate whether the current countdown timer is on or off or the time gear for the countdown setting. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the wall-mounted countdown timer in the embodiment.

[0017] Figure 2 1 is a rear view of the wall-mounted countdown timer in the embodiment.

[0018] Figure 31 is a diagram showing the internal structure of the lower housing of the wall-mounted countdown timer in the embodiment.

[0019] Figure 4 is an exploded view of a wall mounted countdown timer in an embodiment.

[0020] Figure 5 1 is a circuit schematic diagram of a wall-mounted countdown timer power supply board in an embodiment.

[0021] Figure 6 1 is a circuit schematic diagram of a wall mounted countdown timer control board in an embodiment.

[0022] In the figure: 100, outer cover; 101, hanging buckle; 200, upper shell; 201, panel; 202, power button; 203, countdown button; 204, buckle slot; 300, lower shell; 301, guide surface; 302, air vent; 303, limiting rib; 304, power cord hole; 400, power board. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0024] like Figure 1-6 As shown, the present embodiment discloses a wall-mounted countdown timer, comprising an outer cover 100, an upper shell 200 and a lower shell 300, wherein the lower shell 300 is a square box body, and the lower shell 300 is used to be placed in a groove on the wall, and a plurality of limiting ribs 303 are symmetrically arranged on the inner side surface of the lower shell 300, and a power board 400 is installed on the limiting ribs 303, and guide surfaces 301 are respectively arranged on both sides of the bottom surface of the lower shell 300, and a plurality of air holes 302 are arranged on the guide surface 301, and a plurality of power line holes 304 are arranged on the guide surface 301; the upper shell The body 200 is installed on the lower shell 300 by screws, and a plurality of buckle grooves 204 are arranged on the upper and lower sides of the upper shell 200. A panel 201 is arranged on the upper shell 200, and an on / off key 202, a countdown key 203 and an indicator light are arranged on the panel 201; the outer cover 100 covers the upper shell 200 for decoration, and a rectangular window is opened in the center of the outer cover 100. The panel 201 passes through the window so that the outer cover 100 covers the upper shell 200, and a hanging buckle 101 is arranged on the bottom surface of the outer cover 100 corresponding to the buckle groove 204 of the upper shell 200.

[0025] The power board 400 is provided with a power circuit, which provides DC power and switches the actuator on and off; the power board 400 is provided with four power line terminals, namely, a neutral terminal N, a live terminal L-in, a load terminal L-out, and a ground terminal.

[0026] like Figure 5 The power supply circuit shown includes a rectifier filtering circuit and a step-down voltage stabilization circuit. The rectifier filtering circuit includes a rectifier bridge DB1, a capacitor C1, resistors R1 and R2. The live wire terminal L-in is connected to resistors R1, R2 and the input pin 1 of the rectifier bridge DB1 in sequence. The capacitor C1 is connected in parallel with the resistor R2 to perform filtering. Pin 3 of the rectifier bridge DB1 is connected to the neutral wire terminal N. Pin 2 of the rectifier bridge DB1 serves as an output terminal. Pin 4 of the rectifier bridge DB1 is connected to the ground terminal.

[0027] The step-down voltage stabilizing circuit includes a capacitor C2, a voltage stabilizing diode ZW1, a voltage stabilizer U1, and a capacitor C3; the voltage stabilizing diode ZW1 and the capacitor C2 are respectively connected in parallel with the output end of the rectifier bridge DB1. In the embodiment, the capacitor C2 is a polar electrolytic capacitor, the voltage stabilizing diode ZW1 adopts a rated voltage of 12V, and the current limiting resistor R2=560 kilo-ohms. Under the action of the voltage stabilizing diode ZW1 and the current limiting resistor R2, a 12V DC voltage can be stably output.

[0028] The input end of the voltage regulator U1 is connected to the output end of the 12V DC voltage, the output end of the voltage regulator U1 is connected in parallel with the capacitor C3, the ground end of the voltage regulator U1 is grounded, the model of the voltage regulator U1 is 78L05, and it outputs a 5V DC voltage. In this embodiment, the on-off actuator is a relay, the input end of the main circuit of the relay JK1 is connected to the live wire end L-in, the output end of the main circuit of the relay JK1 is connected to the load end L-out, one end of the trigger circuit of the relay JK1 is connected to the 12V voltage, and the other end is connected to the collector of the transistor Q1, the emitter of the transistor Q1 is grounded, the base of the transistor Q1 is connected to the resistor R3 and then connected to the signal point out, and the diode D1 in parallel with the trigger circuit of the relay RE1 is used to cut off the induction current protection circuit. When the out end inputs a high level, the transistor Q1 is turned on, the potential difference between the two ends of the trigger circuit of the relay JK1 is 12V, the relay JK1 is energized, the main circuit is turned on, and the line is turned on.

[0029] like Figure 6 As shown, the control board includes a control chip, and pins 4, 5, 6, 7, 8, and 9 of the control chip are respectively connected to six countdown keys 203, and pin 12 is connected to the switch key 202. At the same time, pins 15, 16, 18, 19, 20, 21, and 22 of the control chip are respectively connected to LED lights. The lighting of the LED lights indicates that the countdown timer is turned on. The control chip receives the key signal pin 17 and outputs a control signal out to control the relay to close and start the countdown timer.

[0030] The basic working principle of the wall-mounted countdown timer in this embodiment is: pressing the switch key can turn the countdown timer on or off, and pressing the countdown key will turn it on and off after a certain time, and the on time is marked on the countdown key.

[0031] Initially, after the countdown timer receives the corresponding AC power, it completes the self-test first (the 6 indicator lights light up in sequence and then go out together), and then the product is in a no-output state, and all the indicator lights are off.

[0032] To start the countdown, press the countdown button corresponding to the time marked on the countdown timer, the indicator light corresponding to the button will light up, the countdown will start, and the product will start the countdown output (relay energized). For example, if you want to set a 30-minute countdown, press the "30MIN" countdown button, and the "30M" indicator light will light up, indicating that the 30-minute countdown is set successfully, and the 30-minute countdown program will start, and the product will start the 30-minute countdown output; after the countdown ends, all indicators will go off.

[0033] After setting the countdown, pressing the countdown button repeatedly before the countdown ends will be invalid. For example, if a 30-minute countdown is set at 12:00, then pressing the 30-minute countdown button repeatedly before 12:30 will be invalid and the countdown will end at 12:30.

[0034] Change the countdown. If you need to change a different countdown time, just press the button corresponding to the countdown time. At this time, the original countdown gear indicator light will go out. The gear indicator light corresponding to the most recently pressed button will light up, and the countdown change setting will be successful. Start the countdown program after the change, and the product will start to output according to the changed countdown. For example, if a 30-minute countdown has been set and you want to set a 1-hour countdown, just press the "1 hour" countdown button. At this time, the "30M indicator light" will go out, and the "1H" indicator light will light up, indicating that the 1-hour countdown setting is successful. Start the 1-hour countdown program, and from this moment on, the socket will start the 1-hour countdown output. (The relay remains energized during the change).

[0035] End countdown. The countdown will end in the following situations: 1. When the time is up, the countdown ends, the corresponding gear indicator light will go out, and the product stops outputting (the relay is disconnected). Or 2. At any time during the countdown, press the "ON / OFF" key to end the currently running countdown, and the product stops outputting (the relay is disconnected). All indicators go out.

[0036] Start the normally open output. If there is a countdown running, the normally open needs to proceed to step 1 first, and then to step 2; if there is no countdown running, proceed directly to step 2.

[0037] Step 1: If any countdown indicator light is on, you need to press the "ON / OFF" button to turn off the current countdown. At this time, all the lights on the panel will go out and the product will have no output.

[0038] Step 2: Press the "ON / OFF" button, the normally on output indicator light will light up, and the product will start normally on output.

[0039] End the normal output. When the product is in normal output, that is, the normal output indicator is on, 1. Press the "ON / OFF" button, the normal output indicator goes out, and the product ends the normal output. Or 2. Press the countdown button to be set, and the socket starts the countdown output.

[0040] To reset the current countdown, it is invalid to press the countdown button repeatedly while the countdown is running. You can reset the countdown by the following method: 1. Press the "ON / OFF" button to turn off the current countdown. Then press the same countdown button. Or 2. Press any other countdown button, then press the current countdown button.

[0041] The above description is only a preferred embodiment of the present utility model, so all equivalent changes or modifications made according to the structure, features and principles described in the scope of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A wall-mounted countdown timer, comprising an outer cover (100), an upper shell (200) and a lower shell (300), characterized in that: The lower shell (300) is a square box body. Both sides of the bottom surface of the lower shell (300) are provided with guide surfaces (301), and the guide surfaces (301) are provided with a plurality of air holes (302). The side surfaces of the guide surfaces (301) extending upward in the lower shell (300) are symmetrically provided with a plurality of limiting ribs (303), and the power board (400) is limited and fixed on the limiting ribs (303). The upper shell (200) is fixedly arranged on the top of the lower shell (300), and the upper shell (200) is provided with a panel (201), and the panel (201) is provided with a switch key (202), a plurality of countdown keys (203) and a plurality of indicator lights. A window is opened in the center of the outer cover (100), and the panel (201) passes through the window so that the outer cover (100) covers the upper shell (200).

2. A wall-mounted countdown timer according to claim 1, characterized in that: A plurality of wiring terminals are provided on the side of the power board (400) facing the guide surface (301), and the guide surface (301) is provided with a power line hole (304).

3. A wall-mounted countdown timer according to claim 2, characterized in that: The connection terminals are a neutral terminal, a live terminal, a load terminal, and a ground terminal.

4. A wall-mounted countdown timer according to claim 1, characterized in that: The side surface of the upper shell (200) is provided with a plurality of buckle grooves (204), the bottom surface of the outer cover (100) is provided with hanging buckles (101) corresponding to the buckle grooves (204), and the outer cover (100) and the upper shell (200) are buckled and arranged.

5. A wall-mounted countdown timer according to claim 1, characterized in that: The on / off key (202) is arranged on the upper side of the panel (201), and six countdown keys (203) are provided. The countdown keys (203) are arranged in parallel on the panel (201).

6. A wall-mounted countdown timer according to claim 5, characterized in that: The six countdown buttons (203) are respectively marked with 5min, 10min, 30min, 60min, 2hour and 4hour.

7. A wall-mounted countdown timer according to claim 1, characterized in that: The power board (400) is provided with a power module and an execution module, and the power module provides a direct current power supply and an on-off power supply for the actuator.

8. A wall-mounted countdown timer according to claim 7, characterized in that: The power module includes a rectifier bridge DB1, a capacitor C1, a resistor R1, a resistor R2, a capacitor C2, and a voltage regulator diode ZW1. The resistors R1 and R2 are connected in series to the input end of the rectifier bridge DB1, the capacitor C1 is connected in parallel to the resistor R2, and the voltage regulator diode ZW1 and the capacitor C2 are connected in parallel to the output end of the rectifier bridge DB1 respectively.

9. A wall-mounted countdown timer according to claim 7, characterized in that: The execution module includes relay JK1, transistor Q1, resistor R3 and diode D1. The input end of the main circuit of relay JK1 is connected to the live wire end, the output end of the main circuit of relay JK1 is connected to the load end, one end of the trigger circuit of relay JK1 is connected to the 12V voltage, and the other end is connected to the collector of transistor Q1, the emitter of transistor Q1 is grounded, the base of transistor Q1 is connected to resistor R3 and then connected to the signal point out, and the trigger circuit of relay RE1 is connected in parallel with diode D1.

10. A wall-mounted countdown timer according to claim 5, characterized in that: The panel (201) is provided with a control board, and the control board is provided with a control chip. The control chip receives signals from the switch key (202) and the countdown key (203) to output control signals to drive the execution module and light up the indicator light.

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