JPS6143232Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a vehicle speed indicating device, and in particular, the present invention divides the vehicle speed indicating portion of the indicating device into a plurality of groups according to the vehicle speed, and the vehicle speed is within the speed range of the group. This invention relates to a vehicle speed display device configured to change the color of the display section each time the vehicle speed exceeds the speed limit to give a caution or warning to the driver.

(Prior Art) Automobiles are usually equipped with a vehicle speed indicating device such as an analog meter, bar graph, or digital meter in order to notify the driver of the speed. Some of these vehicle speed display devices change the display method, such as by changing the color of the display section, when the vehicle speed exceeds a switching point to give caution or warning to the driver. For example, if the vehicle speed is less than 60km/h, it will be green.
If the vehicle speed is 60 km/h or more and less than 100 km/h, the sign will be yellow, and if the vehicle speed is 100 km/h or more, the sign will be red. In this case, there are various ways to change the color, such as changing the color of the dial, changing the color of the pointer, changing the color of the numbers on the display, etc., but the purpose of doing this is to avoid excessive speed. This is to ensure traffic safety by giving cautions and warnings against excessive speeding, especially on expressways where the sense of speed is easily paralyzed or immediately after exiting the expressway.

(Problems to be Solved by the Invention) However, in the conventional device as described above, the point at which the vehicle speed is changed at which the color of the indicator portion is changed remains unchanged. This means that even if you have just gotten off a freeway or motorway, or even during rainy or snowy conditions when visibility is poor and the vehicle is more likely to skid, for example, the vehicle speed is 60 mph.
The color of the sign will not change from green to yellow unless the speed exceeds Km/h. Therefore, in such conventional marking devices, even if the driving conditions of the vehicle change, the function of the marking device does not follow this change. If the marking device is matched to the driving conditions during rainy or snowy conditions when the vehicle is more likely to slip, it will not match the driving conditions during rainy or snowy days, when the vehicle is more likely to skid. It has the disadvantage that it no longer matches the driving conditions immediately after getting off the expressway or expressway.

The present invention attempts to eliminate these conventional drawbacks, and its purpose is to make it possible to change the point at which the color of the vehicle speed indicator changes in accordance with changes in the driving conditions of the vehicle. The present invention aims to provide a speed indicator device for a vehicle that is easy to use.

(Means for Solving the Problems) The present invention arranges bar graphs in which a plurality of display lamps of the same color are arranged in a row, each with a different color, and also connects the ends of each bar graph to each other. The above-mentioned drawbacks of the conventional bar graph can be solved by providing a vehicle speed indicator device having a switching means for partially overlapping the display lamps and lighting only one of the bar graph indicator lamps in the overlapping portion depending on the driving conditions of the vehicle. It is something to do.

(Function) The present invention divides a bar graph in which a plurality of display lamps serving as a vehicle speed indicator are arranged in a line into a plurality of groups according to the vehicle speed range, and the vehicle speed falls within the speed range of the group. This is a vehicle speed display device that is configured to give a caution or warning to the driver by changing the color of the display section each time the vehicle speed is exceeded. Change to speed range.

(Example) Next, an example of the present invention will be described in detail using the drawings.

FIG. 1 is a circuit diagram of an embodiment of the vehicle speed indicating device according to the present invention, mainly showing the display tube portion. In FIG. 1, reference numeral 5 denotes a scale plate that scales the running speed of the vehicle, and a scale is carved at every 10 km/h. 4 is a bar graph arranged near the bottom of the scale plate 5 in parallel thereto. The bar graph consists of a display tube consisting of a number of incandescent light bulbs arranged in a horizontal direction. The first bar graph 4-1 is made up of a large number of green display tubes arranged in a horizontal row, and the scale plate 5 indicates the vehicle speed of 0 km/h.
The stations are located along the general perimeter from 65km/h to 65km/h. The second bar graph 4-2 is made up of a large number of yellow display tubes arranged in a row horizontally, and is arranged along the vehicle speed range from 50 km/h to 105 km/h on the scale plate 5. The low speed part of 50km/h ~ 65
Km/h overlaps with the high vehicle speed portion of the first bar graph 4-1. The third bar graph 4-3 has a large number of red display tubes arranged in a row horizontally, and is arranged along the range of vehicle speed from 90 km/h to 130 km/h on the scale plate 5. The low vehicle speed portion of 90 km/h to 105 km/h overlaps with the high vehicle speed portion of the second bar graph 4-2. 1 is a vehicle speed detector, for example, a pick-up coil detects a large number of blades carved around a gear provided on the output shaft of a transmission, and a pulse is generated each time the blade passes the pick-up coil. This is a well-known vehicle speed detector that outputs. Reference numeral 2 denotes an arithmetic unit that processes the output signal (pulse signal) from the vehicle speed detector 1 and generates an output signal for lighting each display tube of the bar graph 4 corresponding to the vehicle speed.
Reference numeral 3 denotes a drive device for driving and lighting the display tube of the bar graph 4. Note that details of the arithmetic device 2 and the drive device 3 will be explained in detail later. 7 is a switching relay. Reference numerals 7a, 7b, 7c, and 7d are relay contacts of the switching relay 7, which are respectively inserted in the middle of a circuit for lighting the display tube of the above-mentioned lap portion of the bar graph display tube. 7e is a drive coil of the switching relay 7. WS is a wiper switch, and 6 is a wiper motor.

FIG. 2 is a circuit block diagram of the entire vehicle speed indicating device showing the inside of the arithmetic unit 2 in detail. In the figure, 11 is a gate circuit, 12 is a counter circuit, 13 is a latch circuit, 14 is a timing signal generation circuit, and 15 is a decode circuit. Reference numeral 16 denotes an amplifier that constitutes the main part of the drive device 3 for driving and lighting the display tube of the bar graph 4, and can amplify the minute signal output from the decoding circuit 15 to drive and light the display tube made of an incandescent light bulb. It amplifies the signal to a sufficient level. Reference numeral 17 indicates a display tube group, which collectively shows the display tubes constituting the bar graph 4 shown in FIG. 18 is a waveform shaping circuit; 19 is a pickup coil for detecting the blade of a gear 20 provided, for example, in the output shaft of a transmission; these waveform shaping circuit 18 and pickup coil 19 constitute the vehicle speed detector 1.

Next, the operation of the present invention will be explained using an example of changes in driving conditions between sunny and rainy days.

First, in FIG. 2, the gear 20 rotates in proportion to the vehicle speed, and each time its blade passes the pick-up coil 19, a pulse signal is output from the pick-up coil 19, and this signal is waveform-shaped by the waveform shaping circuit 18. be done. The waveform-shaped pulse signal is input to the counter circuit 12 through the timing signal period gate circuit 11 determined by the timing signal generation circuit 14.
will be counted. The count value is then stored in the latch circuit 13. The count value stored in the latch circuit 13 is read by the decoding circuit 15, decoded, and inputted to the driving device 3 for driving the display tube. The signal input to the drive device 3 is amplified by the amplifier 26, and the display tube corresponding to the signal is lit.

Next, in FIG. 1, the wiper switch WS is open when the weather is clear. Therefore, the switching relay 7 is not energized, and the relay contact 7 of the switching relay 7
a, 7b, 7c, and 7d are in contact with the left side
The green display tubes of the bar graph 4-1 are lit sequentially from the left side in FIG. 1 in accordance with the vehicle speed. When the vehicle speed exceeds 65km/h and reaches 105km/h, the yellow display tube of the second bar graph 4-2 changes to the first one according to the vehicle speed.
In the figure, the lights are lit sequentially from the left side. Vehicle speed is 105
When the speed exceeds Km/h, the red display tube of the third bar graph 4-3 lights up sequentially from the left side in FIG. 1 in accordance with the vehicle speed.

When the driver activates the wiper switch WS during rain or snow, the wiper motor 6 is activated and the wiper starts operating (not shown in the figure), and when the wiper switch WS is turned on, the switching relay 7 is activated. The relay contacts 7a, 7b, 7c, and 7d can be switched to the right Y end. For this reason, when the vehicle speed is from 0 km/h to 50 km/h, the green display tube of the first bar graph 4-1 is lit sequentially from the left side in FIG. 1 according to the vehicle speed. When the vehicle speed exceeds 50 km/h and reaches 90 km/h, the yellow display tube of the second bar graph 4-2 lights up sequentially from the left side in FIG. 1 in accordance with the vehicle speed. The vehicle speed
When the vehicle speed exceeds 90 km/h, the red display tube of the third bar graph 4-3 lights up sequentially from the left side in FIG. 1 in accordance with the vehicle speed.

In the above embodiment, the driving conditions of the vehicle are changed by opening and closing the wiper switch WS, but instead of the wiper switch WS, a driving condition change switch is separately provided, and the driver manually operates the switch. It may be configured to switch.

In addition, the overlap between the ends of each bar graph has been significantly increased, and the switching speed can be changed by changing various driving conditions, such as highway driving and normal road driving, or intermediate driving and night driving. The range may also be larger or smaller.

Furthermore, in the above embodiment, a relay contact that operates in conjunction with the wiper is inserted between the amplifier 3 and the display tube for switching, but it is also possible to insert the wiper operation signal into the amplifier or decoder and provide the amplifier or decoder with a switching function. Good too.

(Effects of the invention) As explained in detail above, according to the invention,
It is possible to change the speed range in which cautions or warnings are given to the driver depending on changes in vehicle driving conditions, such as during rain or snowfall and sunny weather, when driving on a highway and when driving on a normal road, or when driving in the middle and at night. Because you can
Unlike conventional vehicle speed indicator devices, which do not change the speed range that issues warnings and warnings to the driver even when driving conditions change, this system provides appropriate warnings and warnings to the driver in response to changes in vehicle driving conditions. It is something that can be given to

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of an embodiment of the vehicle speed indicating device according to the present invention, mainly showing the display tube portion, and FIG. 2 is a circuit block diagram of the entire vehicle speed indicating device showing the inside of the arithmetic unit 2 in detail. It is. DESCRIPTION OF SYMBOLS 1...Vehicle speed detector, 2...Arithmetic device, 3...Driving device, 4...Bar graph, 5...Scale plate, 6...
...Wiper motor, 7...Switching relay.

Claims (1)

[Scope of utility model registration request] A plurality of bar graphs each having a plurality of display lamps of the same color arranged in a row are arranged in a plurality of rows with different colors, and the ends of each bar graph are partially overlapped with each other, and the overlapping portion is adjusted to the driving conditions of the vehicle. 1. A vehicle speed indicating device comprising a switching means for lighting only one of the bar graph indicator lamps accordingly.