CN2466690Y - a timing device - Google Patents

Abstract

The utility model discloses a timing device, which includes a housing, an LED circuit board, a battery bracket, a battery, a rear housing, and a button assembled from top to bottom, and an LED corresponding to the hour, minute, and second position on the LED circuit board, characterized in that a diffuser is arranged above the LED circuit board, the light-transmitting portion of the diffuser corresponds to each LED on the LED circuit board one by one, and the other portion of the diffuser is a non-light-transmitting portion, and a light guide bracket is provided between the LED circuit board and the diffuser, and the light guide on the light guide bracket corresponds to the light-transmitting portion on the diffuser. The utility model makes the light emitted by the LED evenly distributed on the light-transmitting portion on the diffuser, and the displayed character logo is even and full, and there is no residual light interference when adjacent logos are displayed.

Description

a timing device

The utility model relates to a timing device.

LED (Light Emitting Diode) digital display electronic watches were all the rage in the early 1970s. However, when the LED emits light, there will be a bright spot or light shift in the center of the LED light source, which will cause discontinuous points on the display surface, so that the displayed characters will not be full, uneven, and have a sense of defect.

The purpose of the utility model is to provide a timing device that can make the light emitted by the LED evenly distribute on the character mark to be displayed, and eliminate the phenomenon of uneven and not full display.

The main technical solution of the utility model is: the timing device includes a casing assembled from top to bottom, an LED circuit board, a battery holder, a battery, a rear case, and buttons, and there is a button corresponding to the position of the hour, minute and second on the LED circuit board. The LED is characterized in that: an astigmatism sheet is arranged above the LED circuit board, the light-transmitting part of the astigmatism sheet corresponds to each LED on the LED circuit board one by one, the other parts of the astigmatism sheet are opaque parts, and the difference between the LED circuit board and the astigmatism sheet There is also a light guide bracket between them, and the light guide tube on the light guide bracket corresponds to the light-transmitting part on the astigmatism sheet one by one.

The astigmatism film in the utility model is a kind of film that can transmit a part of light and reflect a part of light and has the effect of astigmatism, and its light-transmitting part is used to display characters or patterns of hours, minutes and seconds. The astigmatism sheet can reflect a part of the light emitted from the center of the LED, and the other part can be scattered and refracted on the surface, which can reduce or even eliminate the light spot phenomenon and make the display more full and soft. The light guide tube on the light guide bracket refracts part of the light emitted by the LED to the light-transmitting part of the diffuser through the inner wall of the light guide, instead of all the light being directly irradiated on the diffuser, so that the light can be evenly and softly distributed in the diffuser. In this way, the light emitted by the LED will appear brighter and the color displayed will be more uniform, and it will also partially reduce the spot effect when the LED emits light. Moreover, the light guide can prevent the light from scattering to the adjacent character display area, so as to prevent an afterglow in the adjacent display area when an LED emits light.

Below in conjunction with embodiment the utility model is described in further detail:

Fig. 1 is the structural representation of an embodiment of the utility model;

Figure 2 is a plan view of the LED circuit board;

Figure 3 is a front view of the light guide bracket;

Figure 4 is a reverse view of the light guide bracket;

Fig. 5 is hour, minute astigmatism plan view;

Figure 6 is a plane view of the second astigmatism sheet;

Figure 7 is a rear view of the housing;

Fig. 8 is a structural diagram of a button sheet;

Fig. 9 is a structural diagram of the battery holder.

As shown in Figures 1 and 2, the utility model includes a shell 1 assembled from top to bottom, an LED circuit board 2, a battery holder 3, a battery 4, a rear case 5, and buttons 8, and the LED circuit board 2 is connected with the hour and minute 1. There is an LED 21 corresponding to the second position, and it is characterized in that: an astigmatism sheet 6 is arranged above the LED circuit board 2, and the light-transmitting part of the astigmatism sheet 6 corresponds to each LED on the LED circuit board 2 one by one, and the other parts of the astigmatism sheet 6 are not For the light-transmitting part, there is a light-guiding bracket 7 between the LED circuit board 2 and the light-diffusing sheet 6 , and the light-guiding tube 71 on the light-guiding bracket 7 corresponds to the light-transmitting part on the light-diffusing sheet 6 one by one.

Wherein the astigmatism sheet 6 is divided into the hour and minute astigmatism sheet 61 positioned at the outer circle and the second astigmatism sheet 62 positioned at the inner ring, as shown in Figure 5 and Figure 6, the shadow part of the astigmatism sheet is the opaque part, while the light transmission Some of them are characters or graphic marks used to represent hours, minutes, and seconds. These graphics can be circular, square, triangular or other shapes, and the characters and graphics are printed on the diffuser through screen printing. The color of the astigmatism sheet can be gray, gray black, black, dark blue and other colors that help astigmatism. The light guide tube 71 on the light guide bracket 7 is hollow or filled with epoxy resin or other transparent materials. As shown in Figure 1, there are four circular positioning rods 31 on the outer edge of the battery bracket 3, and the outer edges of the LED circuit board 2 and the light guide bracket 7 are respectively provided with semicircular grooves 22, 72 that match the inner sides of the positioning rods 31. , as shown in Figure 7, there is a semicircular notch 11 on the inner side of the housing 1 that is engaged with the outside of the positioning rod 31, so that the cooperation of the positioning rod 31 with the notch 11, the grooves 22, 72 will fix the light guide bracket, the LED circuit board, and the inside the shell. As shown in Figures 3 and 4, there are positioning pins 73 below the light guide bracket 7 to engage with the positioning holes 23 on the LED circuit board 2, and positioning pins 74 above to engage with the mounting holes 63 on the diffuser 62, which can prevent There is a positional offset between the parts, which affects the display.

In order to ensure the clarity of the display, it must be ensured that the value range of the height of the hour and minute diffuser 61 is 1.5 to 3 mm from the surface of the LED light source, and the value range of the height of the second diffuser 62 is 0.5 to 1.2 mm from the surface of the LED light source. mm.

As shown in Figures 1 and 8, the arched metal button 81 corresponding to the button 8 has a middle fulcrum 88 welded on the LED circuit board 2, and the two ends of the button sheet 81 are two elastic contacts. When the chip is on, the elastic contact can be in contact with the button position on the LED circuit board 2.

As shown in Fig. 1 and Fig. 9, the battery positive pole piece 32 is fixed on the battery bracket 3, and the battery positive pole piece has a horizontal arched elastic contact surface 33 connected with the battery positive pole. At point 34, two contact pins of the "eight" shaped contact 34 are in contact with the positive pole on the LED circuit board 2, and the battery negative plate 35 is a "V" shaped metal piece, and its bottom is fixed on the negative pole of the LED circuit board 2.

The button sheet and the positive and negative electrode sheets of the battery in the utility model are not installed with screws, and compared with the common electronic watch, the structure is simpler and more compact.

Claims (9)

1. time set, comprise the shell (1) of assembling from top to bottom, LED wiring board (2), battery bracket (3), battery (4), back cover (5), button (8), and LED wiring board (2) is gone up and the time, divide, second, the position was to there being a LED (21), it is characterized in that: LED wiring board (2) top is provided with scattering sheet (6), the light transmission part of scattering sheet (6) is corresponding one by one with each LED on the LED wiring board (2), scattering sheet (6) other parts are lightproof part, also have leaded light support (7) between LED wiring board (2) and the scattering sheet (6), the light pipe (71) on the leaded light support (7) is corresponding one by one with the light transmission part on the scattering sheet (6).

2. a kind of time set according to claim 1 is characterized in that: the light transmission part on the scattering sheet (6) is when being used to represent, the minute, second clock shows character or pattern identification.

3. a kind of time set according to claim 1 is characterized in that: the light pipe (71) on the leaded light support (7) is hollow or fills with transparent material and to form.

4. a kind of time set according to claim 1 is characterized in that: scattering sheet (6) when being divided into, minute scattering sheet (61) and scattering sheet in second (62).

5. a kind of time set according to claim 1, it is characterized in that: there are four backstays (31) battery bracket (3) outer, the outer rim of LED wiring board (2) and leaded light support (7) respectively with the groove (22), (72) that have backstay (31) inboard to match, the breach (11) that engages with backstay (31) outside is arranged in the shell (1).

6. a kind of time set according to claim 1, it is characterized in that: leaded light support (7) below has register pin (73) to engage with pilot hole (23) on the LED wiring board (2), and the top has locating pin (74) to engage with the mounting hole (63) of scattering sheet (6).

7. a kind of time set according to claim 4 is characterized in that: the time, minute scattering sheet (61) height and position be apart from LED light emitting source surface 1.5-3mm, the height and position of scattering sheet in second (62) is apart from LED light emitting source surface 0.5-1.2mm.

8. a kind of time set according to claim 1, it is characterized in that: have intermediate support (88) to be welded on the LED wiring board (2) on the arch metal key-press (81) corresponding with button (8), button piece (81) two ends are two resilient contacts, when button (8) when depressing button piece, resilient contact can contact with the key position on the LED wiring board (2).

9. a kind of time set according to claim 1, it is characterized in that: be fixed with battery anode slice (32) on the battery bracket (3), there are horizontal arch Elastic Contact face (33) and anode to join on the battery anode slice, vertical direction on the battery anode slice has " eight " font contact (34), two haptic elements of " eight " font contact (34) contact with the positive pole place on the LED wiring board (2), battery cathode sheet (35) is " V " shape metalwork, and its bottom is fixed on the negative pole of LED wiring board (2).

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