WO2024119594A1

WO2024119594A1 - Timepiece having alarm clock function

Info

Publication number: WO2024119594A1
Application number: PCT/CN2023/073780
Authority: WO
Inventors: 池汉军; 池睿平
Original assignee: 杭州精诚三和定时器实业有限公司
Priority date: 2022-12-09
Filing date: 2023-01-30
Publication date: 2024-06-13
Also published as: CN115808866A

Abstract

A timepiece having an alarm clock function, comprising a case provided with a main control circuit. A dial (3) is installed on the front portion of the case. The case is further internally provided with a timepiece movement (18) and a timing assembly driven by the timepiece movement (18). The case is further internally provided with an angle displacement sensing assembly which is electrically connected to the main control circuit so as to set an alarm time. An alarm time display structure fitting with the angle displacement sensing assembly is provided on the dial (3). The timepiece has alarm clock and timing functions, and has the characteristics of displaying the clear and easily recognizable alarm time and real-time moment, and being easy and convenient to use.

Description

A timer with alarm function

Technical Field

The invention relates to a timing device, in particular to a timer with an alarm clock function.

Background technique

Alarm clocks are essential timekeeping devices for every household; and there are many varieties of alarm clocks on the market, each with its own characteristics. For example, a pointer-type quartz electronic time-telling alarm clock disclosed in CN2643359Y can synchronize the voice time telling with the pointer time, and has the functions of pressing for hours and pressing for minutes; the automatic quartz alarm clock and its movement disclosed in CN2420666Y have the function of timing alarm stopping. The defects of the above alarm clocks are that they have few functions and can only display the real time and set the alarm time; in addition, the setting of the alarm time mostly adopts the pointer type or the button type; when the pointer type is adopted, the user often has to rotate the timing pointer several times to align with the required time scale, and the timing pointer structure is small, so the operation is more troublesome. When the button type is adopted, since the alarm time is only displayed on the display screen, the user often has to repeatedly fiddle with the button many times to complete the setting of the alarm time;. In addition, the existing timer also has only the timing function, which is not used frequently by most users.

Summary of the invention

The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology and provide a timer with an alarm clock function. The timer should have both alarm clock and timing functions, with the characteristics of clear and easy to identify alarm time and real-time moment display, simple and quick and convenient use.

The technical solution provided by the present invention is:
A timer with an alarm clock function, comprising a housing equipped with a battery and a main control circuit, a clock circuit and an alarm circuit fixed in the housing and electrically connected to the main control circuit, and a display screen installed on a dial at the front of the housing and electrically connected to the main control circuit; characterized in that:
The housing is also provided with a timer movement and a timing component driven by the timer movement;
The housing is also provided with an angle displacement sensor component electrically connected to the main control circuit to set the alarm time, and the dial is provided with an alarm time display structure matched with the angle displacement sensor component.

The angle displacement sensor assembly is arranged on the rear side of the dial, and includes a sensing circuit board fixed to the front shell and arranged parallel to the dial, and an angle circuit board arranged parallel to the sensing circuit board and driven by a knob. The sensing circuit board and the angle circuit board cooperate with each other to output a signal to the main control circuit.

The sensing circuit board is fixed on the front end face of the movement cover plate, and the angle circuit board is driven by the knob to perform the sensing cooperation with the sensing circuit board; the knob shaft that is plugged into and cooperates with the knob is rotatably positioned in the central part of the front end face of the movement cover plate, and the connecting plate coaxially installed on the knob shaft is rotatably positioned on the front end face of the sensing circuit board through the ball retaining structure provided, so that the angle circuit board coaxially installed on the back side of the connecting plate remains parallel to the sensing circuit board.

The ball retaining structure includes: a plurality of ball grooves opened on the front and back sides of the connecting plate and arranged regularly, and a plurality of balls are arranged in each ball groove; the axis centers of all balls arranged on the front or back side of the connecting plate are respectively located on the same circumferential surface, and the circumferential surface is arranged coaxially with the axis of the knob shaft.

The alarm time display structure includes a pointer or a color block display structure; the color block display structure includes an inlet and outlet slit opened in the center of the dial and an indicator piece driven by a knob to pass through the inlet and outlet slit and rotate between the back of the dial and the surface of the dial.

The indicating piece is arranged parallel to the dial surface, and passes through the inlet and outlet slots and rotates from the back of the dial to the surface of the dial, so as to indicate the corresponding alarm time through the scales on the obscured dial surface.

The entry and exit slit extends from the central hole of the dial to the 0 scale position of the dial; the sheet surface of the indicator piece is arranged parallel to the dial surface and is also provided with a straight groove corresponding to the slit, which extends from the center of the indicator piece along the radial direction to the edge of the indicator piece and divides the indicator piece into a starting end and an end end.

The timer movement comprises a wheel assembly driven by a quartz movement and a traveling wheel driven by the wheel assembly; the timer movement is installed in a positioning groove of a rear housing, and the front side is pressed and positioned by a movement cover plate; the wheel shaft is fixed to the front of the quartz movement housing, the wheel assembly is rotatably sleeved on the wheel shaft, and the movement driving teeth are meshed with the gears of the wheel assembly and drive the wheel assembly.

The main control circuit is electrically connected to the first display circuit, the second display circuit, the clock circuit, the timer circuit and the alarm circuit respectively; the first display circuit is electrically connected to the angle sensor circuit, the alarm circuit, the display backlight circuit and the display screen respectively; the second display circuit is also electrically connected to the display screen; the power supply circuit supplies power to the main control circuit, the first display circuit, the second display circuit and the angle sensor circuit respectively; the main control circuit and the first display circuit are also respectively provided with a button for turning on the power supply.

Beneficial effects of the present invention:
The present invention has two functions of a timer and an alarm clock, thereby significantly expanding the scope of use; an angle displacement sensor component is used to set the alarm time, and the alarm time can be directly set by simply turning it once. Not only is the operation simple, fast and convenient, and the timing can be guaranteed accurately, but the alarm time is also displayed clearly and conspicuously, and the identification is intuitive and not prone to errors, giving consumers a brand new experience.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of the main structure of Example 1 of the present invention (using a color block display structure to display the alarm time).

FIG. 2 is a schematic diagram of the right side structure of FIG. 1 .

FIG. 3 is a schematic diagram of the main structure of Embodiment 2 of the present invention.

FIG. 4 is a cross-sectional enlarged structural schematic diagram of FIG. 2 .

FIG. 5 is an exploded schematic diagram of an embodiment of the present invention.

FIG. 6 is an exploded schematic diagram of the timer movement in FIG. 5 .

FIG. 7 is an enlarged structural schematic diagram of portion A in FIG. 6 .

FIG. 8 is a schematic diagram of the front structural view of the connecting plate in FIG. 5 .

FIG. 9 is a schematic diagram of the rear structural view of the connecting plate in FIG. 5 .

FIG. 10 is a schematic diagram of the connection relationship between the connecting plate and the knob in FIG. 5 .

FIG. 11 is a schematic diagram showing the matching relationship between the indicator sheet and the scale plate in the color block display structure.

FIG12 is a circuit diagram of Embodiment 1 of the present invention.

FIG13 is a circuit structure diagram of Embodiment 1 of the present invention.

FIG. 14 is a schematic diagram of a printed circuit amplification structure of a signal acquisition unit of a sensing circuit board in Example 1. FIG.

Figure 15 is a schematic diagram of the printed circuit amplification structure of the angle circuit board signal acquisition part in Example 1.

Markings in the figure:
1. Knob; 1.1. Knob shaft; 2. Transparent lens; 3. Dial; 3.1. Inlet and outlet gap; 4. Indicator sheet; 4.1. Straight groove; 5. Front shell; 6. Display screen; 7. Display screen bracket; 8. Connecting plate; 8.1. Ball; 8.2. Ball groove; 9. Angle circuit board; 10. Induction circuit board; 12. Main circuit board; 13. Button; 14. Alarm element; 15. Back shell; 16. Magnetic block; 17. Battery; 18. Timer movement; 19. USB interface; 20. Minute wheel shaft; 21. Minute wheel component; 22. Movement splint; 23. Quartz movement; 24. Movement cover; 25. Traveling wheel; 25.1. Lever; 26. Movement board; 27 Elastic contact piece; 28. Switch column; 29. Movement driving tooth.

Implementation

The specific implementation of the present invention is further described in detail below in conjunction with the embodiments shown in the drawings.

The alarm clock with a timer function as shown in FIG1 comprises a housing (formed by connecting a front housing 5 and a rear housing 15) equipped with a battery 17 and a main control circuit, a clock circuit and an alarm circuit (wherein the alarm element is preferably a buzzer) fixed to the rear of the housing and electrically connected to the main control circuit, a dial 3 located at the front of the housing, and a display screen (displaying the actual running time) located at the front of the housing and electrically connected to the main control circuit; the front of the dial is also closed with a transparent lens 2 to keep the inside of the housing clean.

The above structure is similar to the existing quartz movement alarm clock.

The improvement of the present invention is:
The housing is also provided with a timer movement 18 and a timing assembly driven by the timer movement;
It can be seen from Figures 5 and 6 that the timer movement and timing assembly are both prior art (see CN106773609A); the timer movement includes a quartz movement 23 that generates a driving magnetic field (the main control chip sends an excitation current of a set frequency to generate a corresponding driving magnetic field through the timing coil in the quartz movement), a movement driving tooth 29 driven by the driving magnetic field through the central output wheel assembly, and a wheel assembly 21 driven by the movement driving tooth; the timer movement is installed in the positioning groove of the rear shell, and the front side is pressed and positioned by the movement cover plate 22; the wheel shaft 20 is fixed to the front part of the quartz movement housing, and the wheel assembly 21 is rotatably sleeved on the wheel shaft, and the movement driving tooth extends from the opening at the front part of the quartz movement housing and meshes with the gear of the wheel assembly to drive the wheel assembly. The gear shaft of the minute wheel component passes through the holes in the center of the movement splint 22 and the movement cover plate 24 in sequence and then extends forward (the gear shaft of the minute wheel component is connected to the gear by a certain friction force; when setting the timing time, the gear shaft is twisted but the gear does not rotate, and sliding occurs between the two; after the timing is set, the gear can drive the gear shaft to rotate together); the movement splint 22 is fixed to the quartz movement housing, and the timing assembly (existing technology) is installed in the space between the movement splint and the quartz movement housing; the timing assembly includes an elastic contact piece 27 installed on the movement circuit board, a switch column 28 and a running wheel 25 driven by the minute wheel component, and a lever 25.1 is provided on the running wheel, and the lever forces the elastic contact piece to bend and then contact the switch column to output a signal.

An angle displacement sensor component is also arranged in the housing, and the angle displacement sensor component is electrically connected to the circuit board for setting the alarm time (i.e. the alarm time of the alarm clock), and an alarm time display structure corresponding to the alarm time is arranged on the dial.

It can be seen from Figure 4 that the angle displacement sensor component is located on the rear side of the dial 3 (i.e., the right side of Figure 4), including a sensing circuit board 10 and an angle circuit board 9 that cooperates with the sensing circuit board; the sensing circuit board is equipped with an angle sensor chip U4 and a signal acquisition unit, and the sensing circuit board is fixed on the front end face of the movement cover plate 24 and its center hole is coaxial with the dial (the rear edge of the movement cover plate is against the front edge of the movement splint). The angle circuit board is fixed to the back side of the connecting plate 8 (the side facing the sensing circuit board), and can be driven by the connecting plate to rotate around the axis of the dial; during the rotation process, the signal acquisition part of the angle circuit board cooperates with the signal acquisition part of the sensing circuit board for capacitive sensing, so that every time the angle circuit board rotates an angle, the signal acquisition part of the sensing circuit board senses and generates an angle signal; and after the rotation stops, the last generated angle signal is output as the corresponding alarm setting signal (through eight contacts, CL1 to CL8 are output respectively, a total of eight signals) to the angle sensor chip U4, and U4 converts it and sets it as the alarm time or the timer setting time (when the alarm time is reached, the main circuit board starts the alarm element to make a sound). Obviously, the structure and working principle of the angle displacement sensor assembly are the same as those of the conventional angle displacement sensor, so they will not be described one by one.

Since the sensor circuit board rotates 360 degrees for exactly 12 hours on the clock face, the conversion of the angle and the time scale matches exactly: rotating 90 degrees is 3 o'clock, rotating 180 degrees is 6 o'clock, and so on.

See Figures 8 to 10; the connecting plate structure is similar to the sliding plate disclosed in CN217932436U, which is a disc-shaped plate with a knob shaft 1.1 fixed at the axis, and the two ends of the knob shaft extend vertically to the end faces on both sides at the center of the connecting plate, one end is tightly matched with the gear shaft of the wheel sub-wheel component to drive the gear shaft of the wheel sub-wheel component to rotate, and the other end is a knob handle that can cooperate with the knob. The connecting plate is also the same as the sliding plate, and a ball holding structure is provided to keep the rotation stability of the connecting plate; the ball holding structure includes: a plurality of ball grooves 8.2 opened on the front and back sides of the connecting plate and arranged regularly (four ball grooves are respectively shown on each end face in Figures 8 and 9), and a plurality of balls 8.1 are arranged in each ball groove (three balls are respectively shown in Figures 8 and 9); the axis centers of all balls arranged on the front or back side of the connecting plate are respectively located on the same circumferential surface, and the circumferential surface is coaxially arranged with the axis of the knob shaft. After the ball is installed, part of it can be exposed in the ball groove, so that the ball in the ball groove on the front side of the connecting plate abuts against the mating surface 5.1 of the front shell (that is, the side of the shrinkage portion facing the connecting plate); and the ball in the ball groove on the back side of the connecting plate abuts against the front side of the outer edge of the sensing circuit board for rolling engagement (the circuit on the sensing circuit board is annular, and its diameter is smaller than the circumferential diameter of the ball groove, so the circuit is avoided during rolling engagement).

The alarm time display structure includes a pointer or a color block display structure. When a pointer is used, it only needs to be fixed on the knob shaft (conventional structure).

The color block display structure is the same as the structure disclosed in CN214586412U, including an inlet and outlet slit 3.1 opened on the dial along the radial direction, and an indicator piece 4 driven by the knob shaft and moving between the back of the dial and the surface of the dial through the inlet and outlet slit (the timing time can be set by turning the knob handle).

The entry and exit slit extends from the center hole of the dial to the 0 scale position of the dial; the sheet-shaped, circular disk surface of the indicator sheet is arranged parallel to the dial surface and is also provided with a straight groove 4.1 corresponding to the slit, which extends from the center of the indicator sheet along the radial direction to the edge of the indicator sheet and divides the indicator sheet into a starting end and an end; the end of the indicator sheet (the right side of the straight groove in FIG5 is the end) can be inserted into the back of the dial from the entry and exit slit, and the starting part can be blocked on the surface of the dial, so that the alarm time is indicated by the scale pointed by the starting end. When in use, the starting end of the indicator sheet is driven by the knob shaft and rotates from the back of the dial to the surface of the dial through the entry and exit slit. A scale on the dial pointed by the starting end is the set alarm time; for example (see FIG11), the starting edge of the indicator sheet is aligned with the "3" scale, indicating that the alarm time is 3 o'clock.

See Figure 12: In this embodiment, the main control circuit including the main control chip U1, the clock circuit, the timer circuit, the alarm circuit, the second display circuit including the second display chip U3 and the power supply circuit with a battery are arranged on the main circuit board 12, and the main circuit board is installed in the positioning seat of the rear shell; the display screen circuit board installed on the display screen bracket 7 is equipped with a first display circuit including the first display chip U2, an alarm circuit and a display screen backlight circuit, and the sensing circuit board is equipped with an angle sensing circuit including the angle sensing chip U4 (the first display circuit, the second display circuit, the angle sensing circuit and the main control circuit can also be integrated on the main circuit board and then installed on the connecting board). The circuit connection relationship is: the main control circuit is electrically connected to the first display circuit, the second display circuit, the clock circuit, the alarm circuit (including the alarm element) and the timer circuit respectively; the first display circuit is electrically connected to the angle sensing circuit, the alarm circuit, the display backlight circuit and the display screen (the angle sensing circuit, the alarm circuit, the display backlight circuit and the display screen are electrically connected to the main control circuit through the first display circuit respectively), and the second display circuit is also electrically connected to the display screen; the power supply circuit supplies power to the main control circuit, the first display circuit, the second display circuit and the angle sensing circuit respectively; the main control circuit is also electrically connected to the button S1, and the first display circuit is also electrically connected to the buttons S2 and S3.

The specific circuit is shown in Figure 13.

1. Equipped with the main control circuit of the main control chip U1, which is responsible for clock timekeeping and alarm;
2. A first display circuit equipped with a first display chip U2 and a second display circuit equipped with a second display chip U3 are responsible for controlling the LCD display screen through the display screen backlight circuit, and setting the clock time display and the alarm time of the alarm clock and timer;
3. An angle sensing circuit equipped with an angle sensing chip U4 is responsible for collecting capacitance variable parameters between the angle circuit board signal collection part and the induction circuit board signal collection part, and converting the angle values of these parameters into moment values;

4. Alarm clock circuit, responsible for setting the alarm time;

5. Clock circuit, responsible for ensuring the clock's timing accuracy and clock correction.

Circuit connection relationship

U1 chip: Pin 1# is connected to two parallel paths (one path is connected to resistor R1, capacitor C4, transistor Q1, resistor R2, and diode D1 in sequence; the other path is connected to resistor R3 and button S2 in sequence) to connect to the working power supply VDD. It can suspend and resume the timer at a high level and turn off the alarm sound of the buzzer; Pins 2# and 3# control the output of pins 12# and 13# through button S1, and open or close the clock coil SZXQ; Pin 4# is connected to the positive power supply and pin 11# is connected to the negative power supply. Capacitor C3 is connected in parallel to the power supply for filtering and anti-interference stability; Pins 5# and 6# are connected to the clock circuit (composed of oscillator Y1 and capacitors C2 and C3 to ensure the accuracy of the clock); Pin 14# (terminal SI) is connected to pin 8# of chip U2 through anti-interference resistor R13, and to pin 2# of chip U3 through anti-interference resistor R19 for mutual signal transmission; Pin 7# is connected to pin 16# of chip U2 through anti-interference resistor R4 for mutual signal transmission. Pin 8# and pin 9# are connected to the alarm circuit (including alarm clock alarm and timer alarm) respectively; wherein: pin 8# is connected to the base of transistor Q2 through resistor R7 in turn, and the emitter of transistor Q2 is connected to the emitter of transistor Q3 and grounded at the same time; the collector of transistor Q2 is connected to button S4, and the two contacts of S4 are connected to diode D4 and series resistor R8 and light-emitting diode D2 respectively, and then connected in parallel to the working power supply VDD; pin 9# is connected to the base of transistor Q3 through resistor R6, and the collector of transistor Q3 is connected to a contact of S4, and at the same time, the two ends of the alarm element 14 are connected to the working power supply and the collector of transistor Q3 respectively. Pin 10# switches button S3 to ground through resistor R4, and the timer works when button S3 is disconnected (alarm clock stops), and the alarm works when button S3 is closed (timer stops). Pin 12# is connected to pin 13# through resistor R5 and timing coil JSXQ to provide high-frequency excitation current for the timing coil. Pin 10# is connected to ground or suspended through anti-interference resistor R4 to select the use of timer or alarm clock.

U2 chip: Pin 2# is connected to the working power supply through resistor R14, transistor Q4, resistor R9, and LED lamp D3, so that after the signal is amplified by transistor Q4, a high level is output to LED lamp D3 (D3 is used as the backlight source of the LCD display) to control the light emission of the LED lamp; resistor R9 is used to adjust the brightness of the LED display; and the pull-down resistor R12 is used as the clock mode selection (connected for 12-hour system, disconnected for 24-hour system). Pin 5# is connected to the positive power supply, and pin 12# is connected to the negative power supply. The capacitor C5 is connected in parallel to the power supply for filtering. The 9 SEG pins are connected to the 9 pins of the LCD display connector terminal J4 as the output of the display pen segment, among which SEG1 corresponds to the 5# pin connected to the display (LCD display) connector terminal J4, SEG2 corresponds to the 6# pin connected to the display (LCD display) connector terminal J4------ SEG9 corresponds to the 13# pin connected to the LCD connector terminal J4 on the display. In addition, the power button S5 is connected to the 3# and 4# pins of the U2 chip through the resistor R10, and the power button S6 is connected to the 3# and 4# pins of the U2 chip through the resistor R11 to set the alarm time of the clock circuit; these two buttons are also connected to the 7# pin of the chip U1 through the 16# pin via the anti-interference resistor R4 to calibrate the clock circuit; the 16# pin is connected to the 7# pin of the chip U1 through the anti-interference resistor R4 to control the sound of the alarm clock; and when the actual time is consistent with the set alarm time, a signal is sent to the buzzer to make it sound an alarm.

U3 chip: 1# pin is for positive power access, 8# pin is for negative power access, capacitor C7 is connected in parallel to the power supply for filtering and anti-interference stability; 2# pin is connected to 14# pin of U1 and 8# pin of U2 through resistor R19 as the signal transmission end; 3# to 7# pins are connected in parallel through resistors R20 to R27 to form 4 connection terminals (COM1 to COM4) as the output of the display backlight circuit, respectively connected to 1# to 4# pins of the display connector J4 (3# pin is connected to resistor R26, 4# pin is connected to resistor R25, and then the two Connected in parallel as the output terminal COM4 to the screen connector terminal J4; connect the resistor R23 to the 5# pin and the resistor R24 to the 4# pin, and then connect the two in parallel as the output terminal COM3 to the screen connector terminal J3; connect the resistor R22 to the 5# pin and the resistor R21 to the 6# pin, and then connect the two in parallel as the output terminal COM2 to the screen connector terminal J3; connect the resistor R27 to the 7# pin and the resistor R20 to the 6# pin, and then connect the two in parallel as the output terminal COM1 to the screen connector terminal J3). When connecting, COM1 corresponds to the 4# pin-----, and COM4 corresponds to the 4# pin).

U4 chip: Pin 2# is the positive pole and pin 15# is the negative pole for power supply access. Capacitor C6 is connected in parallel to the power supply for filtering, anti-interference and stability. Pins CL1~CL8 are capacitor signal acquisition inputs, which are respectively connected to the 8 pins (pin 1# to pin 8#; pin 1# to pin 8# are omitted in Figure 9) of the angle circuit board signal acquisition unit CJB; Pin 13# is (CHECKIN pin) connected to pin 15# of the angle circuit board signal acquisition unit CJB, and is grounded through resistor R18 and connected to the working power supply through resistor R14; pull-up resistor R15 and pull-down resistor R14 act as voltage induction (changes with the change of capacitance), and the capacitance variables of pins CL1~CL8 are converted by chip U4 digital-to-analog conversion, and the angle value is converted into the moment value in real time. Pin 7# transmits the signal to pin 15# of chip U2 through anti-interference resistor R15, and pin 12# transmits the signal to pin 14# of chip U2 through anti-interference resistor R16. The clock circuit NZDL (conventional general circuit) is connected in series between the 14# and 15# pins of the U2 chip and the 7# and 12# pins of the U4 chip.

Working principle of the timer circuit: The timer operation is completed by the signal provided by the U1 chip; when the 2# pin of U1 is grounded, the 12# pin and the 13# pin of U1 output alternating voltages; the alternating voltage connects the timing coil of the quartz movement to generate a driving magnetic field to drive the gears to move; in the moving state, the button S2 can be operated to make the high level enter the 1# pin of U1 through the anti-interference resistor, and pausing the output of the 12# pin and the 13# pin of U1 can stop the rotation of the gear of the quartz movement (movement active tooth 30); when the button S1 is operated, the 2# pin of U1 is disconnected from the ground, and the 3# pin is grounded, U1 stops supplying power to the 12# pin and the 13# pin, and the 8# pin outputs a high level through the resistor R7 and the transistor Q2 to amplify the voltage to the buzzer to alarm; the button S2 can be operated to make the high level enter the 1# pin of U1 through the anti-interference resistor R3, and the alarm sound at this time can be turned off.

Angle sensing principle: The U4 chip is installed on a fixed sensing circuit board and is coaxial and parallel to the angle circuit board. The angle circuit board can rotate and maintain a certain gap with the sensing circuit board, so as to use the change in capacitance between the two to generate different angle signals. The printed circuit of the angle circuit board signal acquisition section is divided into 12 equally divided sector-shaped small intervals, and each small interval corresponds to an angle of 30° (as shown in 1~12 in Figure 15). In the printed circuit of the sensing circuit board signal acquisition section, the circular A area is divided into 12 large intervals (as shown in A1~A14 in Figure 15). A12) corresponds to the 12 sector-shaped small intervals of the angle circuit board, each of which is divided into 8 small sector-shaped intervals, and the angle corresponding to each small sector-shaped interval is 30/8°; the circular B area in the sensing circuit board is connected to GND (ground) to prevent the capacitance from being interfered by surrounding signals when changing; the circular C area (the smallest ring) of the sensing circuit board is connected to the 13# pin (CHECKIN pin) of the U4 chip; when the angle circuit board is rotated, the large and small intervals of the sensing circuit board can generate capacitance value variables, and through the 13# pin (CHECKIN pin) of the U4 chip, the capacitance value of ... IN pin) is converted into a voltage variable through the pull-up resistor R17 and the pull-down resistor R18 connected to the chip U4, and then the voltage variable is converted into an angle value through the digital-to-analog conversion of the chip U4, and the angle value is immediately converted into a time value, that is, the alarm setting is completed; at the same time, the signal is transmitted from the 7# pin of the chip U4 to the 15# pin of the chip U2 through the anti-interference resistor R15 and the alarm circuit, and the signal is transmitted from the 12# pin of the chip U4 to the 14# pin of the chip U2 through the anti-interference resistor R16 and the alarm circuit, and the corresponding alarm setting time is displayed on the LCD screen by the chip U2 and the chip U3. When the time runs to the set alarm time and the clock time corresponds, the chip U2 transmits the signal to the 7# pin of the chip U1 through the 16# pin, and the chip U1 outputs a high level through the 8# pin, and the signal is amplified by the transistor Q2 and then output to the alarm element (buzzer) to alarm; when the buzzer alarms, the high level signal can be input to the 1# pin of the chip U1 through the key 2, and the buzzer can be temporarily turned off.

As can be seen from the figure: the magnetic block 16 on the back of the housing can be used to fix it on any iron object; the housing is equipped with a USB interface 19.

The method of using the present invention is as follows: the start button S2 starts the power supply to start the machine;
Push button S3 (i.e. button 13 installed on the back of the housing) to put it in the alarm position, and the actual time of the alarm is displayed on the display screen; turning the knob drives the pointer or indicator piece to rotate on the dial, and the scale corresponding to the pointer or indicator piece is the alarm time set for the alarm clock; when the alarm clock set time arrives, the alarm clock emits an alarm sound to prompt.

Then press button S3 to put it in the timer position, then turn the knob to drive the pointer or indicator piece on the dial to rotate. The scale corresponding to the indicator piece is the timing time set by the timer, and the positive timing time (starting from zero) is displayed on the display screen; as time goes by, the indicator piece slowly moves behind the dial; when the set time is reached, the timer gives a prompt (alarm sound or flashing lights), and the indicator pieces also all move behind the dial, and the time displayed on the display screen is the time used for the previous timing.

Claims

A timer with an alarm clock function, comprising a housing equipped with a battery (17) and a main control circuit, a clock circuit and an alarm circuit fixed in the housing and electrically connected to the main control circuit, and a display screen (6) mounted on a dial (3) at the front of the housing and electrically connected to the main control circuit; the characteristics are:

The housing is also provided with a timer movement (18) and a timing component driven by the timer movement;

The housing is also provided with an angle displacement sensor component electrically connected to the main control circuit to set the alarm time, and the dial is provided with an alarm time display structure matched with the angle displacement sensor component.
The timer with an alarm function according to claim 1 is characterized in that: the angle displacement sensor component is arranged on the rear side of the dial, including a sensing circuit board (10) fixed to the front shell (5) and arranged parallel to the dial, and an angle circuit board (9) arranged parallel to the sensing circuit board and driven by the knob (1), and the sensing circuit board and the angle circuit board cooperate in induction to output a signal to the main control circuit.
The timer with alarm function according to claim 2 is characterized in that: the sensing circuit board is fixed to the front end face of the movement cover plate (24), and the angle circuit board is driven by the knob to perform the sensing cooperation with the sensing circuit board; the knob shaft (1.1) inserted and matched with the knob can be rotatably positioned in the central part of the front end face of the movement cover plate, and the connecting plate (8) coaxially mounted on the knob shaft can be rotatably positioned on the front end face of the sensing circuit board through the ball retaining structure provided, so that the angle circuit board coaxially mounted on the back side of the connecting plate and the sensing circuit board remain parallel to each other.
The timer with an alarm function according to claim 3 is characterized in that: the ball retaining structure includes: a plurality of ball grooves (8.2) opened on the front and back sides of the connecting plate and arranged regularly, and a plurality of balls (8.1) are arranged in each ball groove; the axis centers of all balls arranged on the front or back side of the connecting plate are respectively located on the same circumferential surface, and the circumferential surface is arranged coaxially with the axis of the knob shaft.
The timer with an alarm function according to claim 4 is characterized in that: the alarm time display structure includes a pointer or a color block display structure; the color block display structure includes an entry and exit slit (3.1) opened in the center of the dial and an indicator piece (4) driven by a knob to pass through the entry and exit slit and rotate between the back of the dial and the surface of the dial.
The timer with an alarm function according to claim 5 is characterized in that: the indicator piece is arranged parallel to the dial surface, and passes through the entry and exit slit to rotate from the back of the dial to the dial surface, so as to indicate the corresponding alarm time through the scale on the obstructed dial surface.
The timer with alarm function according to claim 6 is characterized in that: the entry and exit slit extends from the central hole of the dial to the 0 scale position of the dial; the sheet surface of the indicator piece is arranged parallel to the dial surface and is also provided with a straight groove (4.1) corresponding to the slit, the straight groove extends from the center of the indicator piece along the radial direction to the edge of the indicator piece and divides the indicator piece into a starting end and an end end.
The timer with an alarm function according to claim 7 is characterized in that: the timer movement includes a wheel assembly (21) driven by a quartz movement (23) and a running wheel (25) driven by the wheel assembly; the timer movement is installed in a positioning groove of the rear housing, and the front side is pressed and positioned by a movement cover (22); the wheel assembly (21) is rotatably mounted on the wheel shaft (20) at the front of the quartz movement housing, and the movement driving tooth (30) is meshed with the gear of the wheel assembly and drives the wheel assembly.
The timer with alarm function according to claim 8, characterized in that:

The main control circuit is electrically connected to the first display circuit, the second display circuit, the clock circuit, the timer circuit and the alarm circuit respectively; the first display circuit is electrically connected to the angle sensor circuit, the alarm circuit, the display backlight circuit and the display screen respectively; the second display circuit is also electrically connected to the display screen; the power supply circuit supplies power to the main control circuit, the first display circuit, the second display circuit and the angle sensor circuit respectively; the main control circuit and the first display circuit are also respectively provided with a button for turning on the power supply.