CN207851519U - A kind of target count-down device - Google Patents

Abstract

The utility model is related to a kind of target count-down device, including shell, the circuit unit being arranged in shell, the button that is arranged on shell, the button are electrically connected with circuit unit, it is characterised in that：Further include shell cover, the shell cover can be pull-in on the front end face of the shell.Target count-down device in the present embodiment, put forward the structure reported and be pull-in on by shell cover on the front end face of shell, facilitate and dismantles shell cover, and card is installed between shell cover and the front end face of shell, the color of card, pattern can as needed or hobby is selected, it is convenient for changing, it is more convenient to use and beautiful.

Description

A kind of target count-down device

Technical field

The utility model is related to a kind of target count-down devices.

Background technology

Count-down device is a kind of common timing tool, is widely used for every field, such as take an examination countdown, important section Day countdown etc. is required to use count-down device.Authorization Notice No. be CN201600567U (application No. is 201029068100.2) Chinese utility model patent《A kind of count-down device》, disclosed in count-down device, structure fixes, Different appearances can not be replaced according to different usage scenarios.In addition existing count-down device product external surfaces plastic cement, metal at Type or gum labeling paper card, it is non-exchange since print content is fixed, can not flexible Application in different themes scene.Even if The picture such as paper card class can be replaced, it is also desirable to the shell of product is dismantled, and fixation is realized by pasting by foreign object, operation It is complicated.

Utility model content

Technical problem to be solved in the utility model is to provide one kind for the above-mentioned prior art without removing shell i.e. The target count-down device of subject picture can easily be replaced.

The technical scheme in the invention for solving the above technical problem is：A kind of target count-down device, including shell, set The button set the circuit unit in shell, be arranged on shell, the button are electrically connected with circuit unit, it is characterised in that： Further include shell cover, the shell cover can be pull-in on the front end face of the shell.

As needed, the card that can be replaced is provided between the shell cover and shell.

Preferably, matching is provided with actuation component on the shell cover and shell.

Preferably, the component that is attracted includes the embedded ironware being arranged in shell cover, and embeds and be arranged in the shell Magnet in front end face.

Preferably, the circuit unit include MCU processor and the display screen being electrically connected respectively with MCU, clock circuit, by Bonded mouth, the button are electrically connected by keystroke interface with the MCU processor；

The window for installing display screen is offered on the front end face of the shell.

Preferably, the display screen is fastened on by a fixed frame in the window.

Preferably, the MCU processor, clock circuit are integrally disposed on pcb board；

The pcb board is fixedly connected on the rear on fixed frame and positioned at display screen, the edge of the display screen and fixation Conductive adhesive tape is provided between frame, the conductive adhesive tape is electrically connected with display screen, and the conductive adhesive tape also passes through pcb board and MCU Processor is electrically connected.

Check count down information under the poor environment of light condition for convenience, the circuit unit further includes and MCU The back light of processor electrical connection, the back light are mounted on the fixed frame and are located at the display screen and pcb board Between.

In order to realize that prompting function, the circuit unit further include having the buzzer being electrically connected with MCU processor, the bee Ring device is connected on the pcb board.

Preferably, the shell includes the first half-shell and the second half-shell that can match pairing, further includes being set in first The shell of half-shell and the second half-shell periphery.

Compared with prior art, the utility model has the advantage of：Target count-down device in the present embodiment carries reporting and lead to Cross the structure that shell cover is pull-in on the front end face of shell, facilitate and dismantle shell cover, and the front end face of shell cover and shell it Between card is installed, the color of card, pattern can be convenient for changing as needed or hobby is selected, more convenient to use And it is beautiful.

Description of the drawings

Fig. 1 is the stereogram of target count-down device in the utility model embodiment.

Fig. 2 is the front view of target count-down device in the utility model embodiment.

Fig. 3 is the rearview of target count-down device in the utility model embodiment.

Fig. 4 is sectional views of the Fig. 2 along line A-A.

Fig. 5 is sectional views of the Fig. 2 along line B-B.

Fig. 6 is the stereogram exploded view of target count-down device in the utility model embodiment.

Specific implementation mode

The utility model is described in further detail below in conjunction with attached drawing embodiment.

As shown in Figures 1 to 6, the target count-down device in the present embodiment, including shell 1, circuit unit, button 2, shell cover 3, it is attracted component 5.

Its middle casing 1 includes that can match the first half-shell 11 and the second half-shell 12 of pairing, first half-shell 11 and the second half 12 pairing back wall of shell sets to form an installation cavity.The shell 1 further includes being set in 12 periphery of first half-shell 11 and the second half-shell Shell 13, the shell 13 in the present embodiment is a frame like structure, after first half-shell 11 and the second 12 pairing of half-shell, Ke Yitao The pairing of first half-shell 11 and the second half-shell 12 is fixed in the periphery realization for being located at first half-shell 11 and the second half-shell 12, the structure Facilitate the dismounting of first half-shell 11 and the second half-shell 12, and then conveniently the component placed in installation cavity body is safeguarded.

Circuit unit is arranged in installation cavity body, which includes pcb board 9, MCU processor, display screen 6, clock Circuit, keystroke interface, back light 10, MCU processor, clock circuit, back light 10 are integrally disposed on pcb board 9, when Clock circuit, back light 10 are electrically connected with MCU processor.MCU processor in the present embodiment can select to use microcontroller, Display screen 6 uses LCD display 6.

Opening is offered on the front end face of first half-shell 11, which constitutes the window for installing display screen 6 on shell 1 100.Display screen 6 is then fastened on by a mounting bracket in window 100, and pcb board 9 is fixedly connected from the rear portion of display screen 6 On mounting bracket, and back light 10 corresponds to the position of display screen 6 between pcb board 9 and display screen 6.Mounting bracket There is the groove for installing display screen 6 for one week, be provided with conductive adhesive tape 8 in mounting groove, which is electrically connected with pcb board 9. Display screen 6 is then fastened in the groove, and is realized between display screen 6 and conductive adhesive tape 8 by the contact with conductive adhesive tape 8 Electrical connection.Such display screen 6 then can be realized by conductive adhesive tape 8 to be electrically connected with pcb board 9, so realize and MCU processor it Between electrical connection.The mounting means of conductive adhesive tape 8 can prevent display screen 6 and be directly welded at present on pcb board 9 using hidden Suffer from.According to the clocking information of clock circuit, MCU processor can show count down information with control display screen 6.And MCU processing Device can control the switch of back light 10, designed based on power saving, after MCU receives 2 information of button, can control backlight light Source 10 is lighted, and is extinguished after a period of time that is delayed, and back light 10 is convenient to check display screen 6 in the insufficient environment of light Chronometric data.

Button 2 is embedded on the rear end face of the second half-shell 12, which can be by keystroke interface and pcb board 9 MCU processor is electrically connected.In the present embodiment, in order to which the convenience of the operation of button 2 and the stability of work is effectively ensured, Position close to rear end face in installation cavity body is additionally provided with key circuit plate 20, and keystroke interface is integrally disposed in key circuit plate On 20, button 2 is electrically connected with the keystroke interface on key circuit plate 20, and key circuit plate 20 is electrically connected with pcb board 9, into And realize the communication connection between button 2 and MCU.Since key circuit plate 20 and the holding of pcb board 9 are relatively fixed, ensure to be electrically connected The reliability connect, and can effectively monitor button 2 and press information.

Circuit unit further includes having buzzer, which can be integrally disposed on key circuit plate 20, the buzzer It is realized and being electrically connected between MCU processor with the connection of pcb board 9 by key circuit plate 20.When in use, when timing terminates Afterwards, MCU processor can control buzzer and work, and then realize that countdown terminates to remind.

The rear end of second half-shell 12 is arranged towards recess in installation cavity body and then is formed the battery cavities 121 for installing battery, The positive shrapnel 122 of both ends setting and cathode shrapnel 123,121 upper cover of battery cavities in the battery cavities 121 are equipped with battery cover 124.It presses Power supply circuit, and the power supply circuit phase on key circuit plate 20, pcb board 9 can be respectively set on key wiring board 20, pcb board 9 Connection, positive shrapnel 122 and cathode shrapnel 123 are electrically connected with the power supply circuit on key circuit plate 20 respectively, key circuit plate 20, integrated component is connected with corresponding power supply circuit respectively on pcb board 9, so then realizes to key circuit plate 20, PCB The power supply of integrated component on plate 9.

Shell cover 3 can be pull-in on by being attracted component 5 on the front end face of first half-shell 11 from front, the suction in the present embodiment Seaming element 5 includes the embedded ironware 51 being arranged in shell cover 3, and is arranged in 1 front end face of shell corresponding to ironware 51 is embedded Magnet 52.Magnet 52 is distributed the four corners being arranged at 11 front end face edge of first half-shell in the present embodiment.Shell cover 3 and shell 1 Between can be with sandwiched card 4, which reserves the position of display screen 6 to facilitate the content checked on display screen 6.Due to shell Lid 3 is easy to remove from shell 1, then can be convenient for changing card 4.Card 4 can be according to environment needs, the happiness of user It is selected well, user can also use the drawing card 4 of oneself DIY to be placed between shell cover 3 and shell 1.

Claims (10)

1. a kind of target count-down device, including shell (1), the circuit unit being arranged in shell (1), setting are on shell (1) Button (2), the button (2) is electrically connected with circuit unit, it is characterised in that：Further include shell cover (3), shell cover (3) energy It is enough pull-in on the front end face of the shell (1).

2. target count-down device according to claim 1, it is characterised in that：It is arranged between the shell cover (3) and shell (1) There is the card (4) that can be replaced.

3. target count-down device according to claim 1 or 2, it is characterised in that：The shell cover (3) and shell (1) on It is attracted component (5) with being provided with.

4. target count-down device according to claim 3, it is characterised in that：The actuation component (5) includes embedded setting Ironware (51) in shell cover (3), and the embedded magnet (52) being arranged in the shell (1) front end face.

5. target count-down device according to claim 1 or 2, it is characterised in that：The circuit unit includes MCU processor And be electrically connected respectively with MCU display screen (6), clock circuit, keystroke interface, the button (2) by keystroke interface with it is described MCU processor is electrically connected；

The window (100) for installing display screen (6) is offered on the front end face of the shell (1).

6. target count-down device according to claim 5, it is characterised in that：The display screen (6) passes through a fixed frame (7) It is fastened in the window (100).

7. target count-down device according to claim 6, it is characterised in that：The MCU processor, clock circuit are integrated to be set It sets on pcb board (9)；

The pcb board (9) is fixedly connected on the rear on fixed frame (7) and positioned at display screen (6), the side of the display screen (6) Conductive adhesive tape (8) is provided between edge and fixed frame (7), the conductive adhesive tape (8) is electrically connected with display screen (6), the conduction Adhesive tape (8) is also electrically connected by pcb board (9) with MCU processor.

8. target count-down device according to claim 7, it is characterised in that：The circuit unit further includes and MCU processing The back light (10) of device electrical connection, the back light (10) are mounted on the fixed frame (7) and are located at the display screen (6) between pcb board (9).

9. target count-down device according to claim 7, it is characterised in that：The circuit unit further include have at MCU The buzzer of device electrical connection is managed, the buzzer is connected on the pcb board (9).

10. target count-down device according to claim 1 or 2, it is characterised in that：The shell (1) includes that can match The first half-shell (11) and the second half-shell (12) of pairing further include being set in first half-shell (11) and the second half-shell (12) periphery Shell (13).