Timer single key circuit structure and quartz timer

Abstract

The utility model relates to a timing device, in particular to a timer single-key circuit structure and a quartz timer. The utility model relates to a quartz timer, and aims to provide a single-key quartz timer which has the characteristics of low cost and adjustable alarm mode. According to the technical scheme, the single-key circuit structure of the timer is characterized by comprising a main control chip U1, and a power supply circuit, a flashing light circuit, an alarm circuit, a key circuit and a timing circuit which are electrically connected with the main control chip U1.

Description

Technical Field

[0001] The utility model relates to a timing device, in particular to a single-button circuit structure of a timer and a quartz timer. Background Art

[0002] At present, the quartz timers on the market mainly adopt the following two alarm modes:

[0003] 1. A function selection switch is arranged on the back of the timer housing, and the alarm mode can be switched between sound prompt and flash prompt; since a specific chip is required to implement this function, the product cost is relatively high.

[0004] 2. A function selection switch is not arranged on the back of the timer housing, and only one of the sound prompt or flash prompt is adopted as the alarm mode, with a relatively simple structure and reduced product cost.

[0005] However, consumers hope for a timer product with relatively low product cost and the ability to independently select the alarm mode to meet the actual use requirements. Summary of the Utility Model

[0006] The purpose of the utility model is to overcome the deficiencies in the above background art and provide a single-button quartz timer, which should have the characteristics of relatively low cost and adjustable alarm mode.

[0007] The technical solution of the utility model is as follows:

[0008] A single-button circuit structure of a timer, characterized in that it includes a main control chip U1 and a power supply circuit, a flash circuit, an alarm circuit, a key circuit, and a timing circuit electrically connected to the main control chip U1.

[0009] In the power supply circuit, the working power supply VDD is connected to the 1# pin of the main control chip U1 and the working power supply VDD is grounded through a capacitor C1, and the 8# pin of the main control chip U1 is grounded; in the timing circuit, the 6# pin of the main control chip U1 is connected to the 7# pin of the main control chip U1 through a coil L1 and a resistor R1.

[0010] In the flash circuit, the working power supply VDD is connected to the 4# pin of the main control chip U1 through a diode D1 and a resistor R2; in the alarm circuit, the 5# pin of the main control chip U1 is connected to the base of a triode Q1 through a resistor R3, the emitter of the triode Q1 is grounded, the working power supply VDD is connected to the collector of the triode Q1 through a buzzer LS1, and the buzzer LS1 is also reversely connected in parallel with a diode D2.

[0011] In the key circuit, the 2# pin of the main control chip U1 is grounded through the switch S3, the 3# pin of the main control chip U1 is grounded through the switch S4, the 6# pin of the main control chip U1 is grounded through the key S5 and the resistor R4, and the 6# pin of the main control chip U1 is connected to the working power supply VDD through the capacitor C4.

[0012] The main control chip U1 is an 8-pin chip.

[0013] A quartz timer, characterized in that it includes a timer single-key circuit structure.

[0014] It also includes a main case, a quartz clock movement, a circuit board, an indicating component driven by the quartz clock movement, and a rotating member for setting the timing time.

[0015] The circuit board is provided with an indicator light and a button; the main case is provided with a key cap matching the button; the main case is provided with an opening matching the indicator light.

[0016] The rotating member is a rotating cover or a knob.

[0017] The beneficial effects of the present utility model are:

[0018] The present utility model uses a single key to cooperate with the built-in 8-pin main control chip, and can realize functions such as switching between flashing light alarm and sound alarm, alarm closing, and running time pause. While meeting the actual use needs of users, it greatly reduces the product cost and improves the product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the schematic diagram of the circuit structure of the present utility model.

[0020] Figure 2 is the schematic diagram of the connection relationship of the circuit structure of the present utility model.

[0021] Figure 3 is the three-dimensional structure schematic diagram of the quartz timer of the present utility model.

[0022] Figure 4 is the cross-sectional structure schematic diagram of the quartz timer of the present utility model.

[0023] Figure 5 is the front view structure schematic diagram of the quartz timer of the present utility model.

[0024] Figure 6 is the rear view structure schematic diagram of the quartz timer of the present utility model.

[0025] Figure 7 is the schematic diagram of the working principle of the quartz timer of the present utility model (zero scale).

[0026] Figure 8It is a schematic diagram of the working principle of the quartz timer of the present utility model (middle scale).

[0027] Figure 9 It is a schematic diagram of the working principle of the quartz timer of the present utility model (full scale).

[0028] Reference numerals:

[0029] Main housing 1, keycap 1-1, quartz clock type movement 2, quartz movement 2-1, first switch post 2-11, second switch post 2-12, spring piece 2-13, central output wheel assembly 2-2, passing wheel 2-3, limiting assembly 2-4, circuit board 3, indicator light 3-1, button 3-2, indicating component 4, rotating member 5, battery 6. Detailed implementation manners

[0030] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0031] Embodiment 1

[0032] As Figure 1 and Figure 2 shown, a single-button circuit structure of a timer includes a main control chip U1, a power supply circuit, a flashing light circuit, an alarm circuit, a button circuit, and a timing circuit.

[0033] The main control chip U1 is electrically connected to the power supply circuit, the flashing light circuit, the alarm circuit, the button circuit, and the timing circuit. The main control chip U1 is an 8-pin chip with the model SOP8. The main control chip U1 includes pin 1 (VDD), pin 2 (PB5), pin 3 (PB4), pin 4 (PB3), pin 5 (PB2), pin 6 (PB1), pin 7 (PB0), and pin 8 (GND).

[0034] The power supply circuit is used for power supply. In the power supply circuit: the working power supply VDD is connected to pin 1 of the main control chip U1 and the working power supply VDD is grounded through a capacitor C1, and pin 8 of the main control chip U1 is grounded. The capacitor C1 is used for filtering and anti-interference to ensure the stability of the circuit.

[0035] The timing circuit is used for the timekeeping of the timer. In the timing circuit: pin 6 of the main control chip U1 is connected to pin 7 of the main control chip U1 through a coil L1 and a resistor R1. The coil L1 is arranged inside the quartz movement.

[0036] The flashing light circuit is used for flashing light alarm. In the flashing light circuit: The working power supply VDD is connected to the 4# pin of the main control chip U1 after passing through the diode D1 and the resistor R2. The diode D1 serves as the light source for the flashing light alarm.

[0037] The ringing circuit is used for sound alarm. In the ringing circuit: The 5# pin of the main control chip U1 is connected to the base of the triode Q1 through the resistor R3. The emitter of the triode Q1 is grounded. The working power supply VDD is connected to the collector of the triode Q1 through the diode D2. The buzzer LS1 is also reversely connected in parallel with the diode D2. The buzzer LS1 serves as the sound source for the sound alarm. The diode D2 is a freewheeling diode, which is used to release the spike voltage generated by the buzzer LS1 when the ringing circuit is turned off, to avoid damage to the triode Q1.

[0038] The key circuit is used for power on / off and setting the working mode. In the key circuit: The 2# pin of the main control chip U1 is grounded through the switch S3. The 3# pin of the main control chip U1 is grounded through the switch S4. The 6# pin of the main control chip U1 is grounded through the key S5 and the resistor R4. The 6# pin of the main control chip U1 is connected to the working power supply VDD through the capacitor C4. The capacitor C4 plays a role in filtering out interference to ensure the stability of the circuit. When the switch S3 is closed, the switch S4 is open. When the switch S3 is open, the switch S4 is closed.

[0039] The above components are all existing technologies and can be obtained through outsourcing.

[0040] The working principle of this circuit structure is as follows:

[0041] 1. Timing

[0042] When the switch S3 is closed and the switch S4 is open for 2 seconds, the timing circuit generates a signal, the coil L1 starts to work, and the quartz timer starts to count down;

[0043] When the alarm mode is sound alarm: When the switch S3 is open and the switch S4 is closed, the timing circuit has no signal, the coil L1 stops working, and the quartz timer stops counting down; At this time, the 5# pin generates alternating high and low levels, the triode Q1 conducts, and the buzzer LS1 rings (emits a "beep beep beep" sound), and the ringing time lasts for 10 seconds (which can be set as required); If the key S5 is pressed, the 6# pin is grounded through the resistor R4, and the ringing of the buzzer LS1 is turned off;

[0044] When the alarm mode is flashing light alarm: When the switch S3 is open and the switch S4 is closed, the timing circuit has no signal, the coil L1 stops working, and the quartz timer stops counting down; At this time, the 4# pin generates alternating high and low levels, the flashing light circuit is turned on, and the diode D2 flashes, and the flashing time lasts for 10 seconds (which can be set as required); If the key S5 is pressed, the 6# pin is grounded through the resistor R4, and the flashing of the diode D2 is turned off;

[0045] 2. Alarm Mode Selection

[0046] When the coil L1 stops working (switch S3 is off and switch S4 is on), quickly press the button S5 twice, which can switch the flashing light alarm to the sound alarm, or switch the sound alarm to the flashing light alarm;

[0047] 3. Timekeeping Pause

[0048] When the coil L1 is working (after switch S3 is on and switch S4 is off for 2 seconds), if the button S5 is pressed briefly once, the coil L1 pauses working (the quartz timer stops counting down), and if the button S5 is pressed briefly once again, the coil L1 resumes working (the quartz timer starts counting down);

[0049] Alternatively, the timekeeping pause can only be used after waking up. The waking-up operation is as follows: when the coil L1 stops working (switch S3 is off and switch S4 is on), hold the button S5 for more than 15 seconds (first, hold the button S5 for 5 seconds. During this period, the 4# pin generates alternating high and low levels, and the diode D1 flashes. Then continue to hold the button S5 for 10 seconds. During this period, the 4# pin generates a high level, and the diode D1 is always on. When the button S5 is held down for 15 seconds, the diode D1 goes out), and the timekeeping pause wakes up.

[0050] Embodiment 2

[0051] A quartz timer, comprising a main case 1, a quartz clock movement 2, a circuit board 3, an indicating component 4 driven by the quartz clock movement, a rotating member 5 for setting the timing time, and a battery 6. The single-button circuit structure is arranged in the quartz timer.

[0052] The circuit board is provided with an indicator light 3-1 and a button 3-2. The front of the main case is provided with a scale dial, the top of the main case is provided with a key cap 1-1 (for cooperating with the button), and the front of the main case is provided with an opening for cooperating with the indicator light (for observing the indicator light). The indicating component is an indicating piece. The rotating member is a rotating cover or a knob.

[0053] The quartz clock movement includes a quartz movement 2-1, a PCB board, a switch assembly, a central output wheel assembly 2-2 driven by the quartz movement, a passing wheel 2-3 driven by the central output wheel assembly, a sounding component, and a limiting component 2-4. The rotating member is connected to the central output wheel assembly. The switch assembly includes a first switch post 2-11, a second switch post 2-12, and a spring piece 2-13.

[0054] The main control chip U1 of the circuit structure is arranged on the PCB board. The indicator light, i.e., diode D1 of the circuit structure. The button, i.e., key S5 of the circuit structure. The sound generating component, i.e., buzzer LS1 of the circuit structure. The spring piece and the second switch post, i.e., switch S3 of the circuit structure. The spring piece and the first switch post, i.e., switch S4 of the circuit structure. The timing circuit of the circuit structure is arranged inside the quartz movement. The battery is used to provide the working power supply VDD.

[0055] When the quartz timer returns to zero, as Figure 7 shown, the passing wheel presses the spring piece, and the spring piece contacts the first switch post (switch S3 is disconnected and switch S4 is closed, and the timing circuit has no signal).

[0056] As Figure 8 shown, rotate the rotating part clockwise by a certain angle, and the quartz timer is at the middle scale. Since the rotating part drives the passing wheel to rotate synchronously, the passing wheel no longer presses the spring piece, and the spring piece disengages from the first switch post due to its own elasticity and contacts the second switch post at the same time (switch S3 is closed and switch S4 is disconnected, and the timing circuit has a signal).

[0057] As Figure 9 shown, if the rotating part is rotated clockwise to the end, due to being controlled by the limiting component, the rotating part can only rotate one week, and the quartz timer is at the full scale. Since the rotating part drives the passing wheel to rotate synchronously, the passing wheel no longer presses the spring piece, and the spring piece disengages from the first switch post due to its own elasticity and contacts the second switch post at the same time (switch S3 is closed and switch S4 is disconnected, and the timing circuit has a signal).

[0058] The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

Claims

1. A single-button circuit structure for a timer, characterized in that: It includes a main control chip U1 and a power supply circuit, a flashing light circuit, an alarm circuit, a button circuit, and a timing circuit electrically connected to the main control chip U1; In the power supply circuit, the working power supply VDD is connected to the 1# pin of the main control chip U1 and the working power supply VDD is grounded through the capacitor C1, and the 8# pin of the main control chip U1 is grounded; in the timing circuit, the 6# pin of the main control chip U1 is connected to the 7# pin of the main control chip U1 after passing through the coil L1 and the resistor R1; In the flashing light circuit, the working power supply VDD is connected to the 4# pin of the main control chip U1 after passing through the diode D1 and the resistor R2; in the alarm circuit, the 5# pin of the main control chip U1 is connected to the base of the triode Q1 through the resistor R3, the emitter of the triode Q1 is grounded, the working power supply VDD is connected to the collector of the triode Q1 through the buzzer LS1, and the buzzer LS1 is also reversely connected in parallel with the diode D2; In the button circuit, the 2# pin of the main control chip U1 is grounded through the switch S3, the 3# pin of the main control chip U1 is grounded through the switch S4, the 6# pin of the main control chip U1 is grounded after passing through the button S5 and the resistor R4, and the 6# pin of the main control chip U1 is connected to the working power supply VDD through the capacitor C4.

2. The timer single-button circuit structure according to claim 1, wherein: The main control chip U1 is an 8-pin chip.

3. A quartz timer, characterized in that: It includes the timer single-button circuit structure according to claim 1 or 2.

4. The quartz timer according to claim 3, characterized in that: It further includes a main case (1), a quartz clock movement (2), a circuit board (3), an indicating component (4) driven by the quartz clock movement, and a rotating member (5) for setting the timing time.

5. The quartz timer according to claim 4, characterized in that: The circuit board is provided with an indicator light (3-1) and a button (3-2); the main case is provided with a key cap (1-1) for cooperating with the button; the main case is provided with an opening for cooperating with the indicator light.

6. The quartz timer according to claim 5, characterized in that: The rotating member is a rotating cover or a knob.

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