JPH0517607Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a totalizer that displays the distance traveled by a vehicle.

[Conventional technology]

Previously, this type of totalizer was published in Japanese Utility Model Application No. 60-52554, Japanese Utility Model Application Publication No. 57-173010, and Japanese Utility Model Application Publication No. 1987-17301.
Publication No. 70759 is known.

7 to 11 show a conventional structure, in which a reversible totalizer is installed in the eddy current type traveling speedometer of a vehicle, and the structure of this totalizer is mounted on the instrument frame 1. Four number rings 3 are rotatably inserted through the provided holding shaft 2, a support shaft 4 is provided opposite to the number rings 3, and the middle part of the support member 5 is inserted and fixed into the support shaft 4. A pinion 6 is provided at one end of the support member 5, the pinion 6 meshes with a feed tooth 7 on the side surface of the adjacent number wheel 3, and a heart cam formed on the side surface of the number wheel 3 is provided at the other end of the support member 5. 8, a main shaft 11 is supported on the instrument frame 1 by a bearing part 10, a pointer shaft 13 is supported by another bearing part 12, and a magnet 14 is attached to the upper end of the main shaft 11. A rotor 15 is fixed to the lower end of the pointer shaft 13 with a gap R between the magnet 14 and the rotor 15.
In addition, a magnetic conductor 16 is fixed to the main shaft 11 with a gap between it and the rotor 15, a pointer 17 is fixed to the upper end of the pointer shaft 13, and a display board 18 displaying a traveling speed scale and numbers is fixed to the instrument frame 1. , an illumination light 19 is provided behind the display board 18, and a spiral spring 20 is attached to the pointer shaft 13.
One end is fixed, the other end is fixed to the instrument frame 1, and a magnet 14 is attached to the instrument frame 1.
A reed switch, which is a sensor 21 that detects the rotational speed of the main shaft 11, is mounted on the display plate 18 with a screw 23 through a holder 22, and a window 24, which is a transparent part, is formed on the display plate 18, and each numeral ring is 3 by the pinion 6, and number wheel 3 is inserted through the window hole 24.
In this case, it is possible to see the mileage value,
In addition, when returning to zero, the support shaft 4 is rotated by a lever not shown, the support member 5 is rotated, and the engaging portion 9 is brought into contact with the heart cam 8, so that each number wheel 3 is provided to be able to return to zero, and furthermore, the vehicle is running. , the main shaft 11 also rotates, and the pointer shaft 13 rotates so that the torque due to the eddy current action generated between the rotor 15 and the magnet 14 and the torque of the spiral spring 20 are balanced, and the pointer 17 adjusts the running speed. is displayed, and the sensor 21 detects the spindle 1.
1 is detected, and when the rotation speed of the main shaft 11 enters a warning range, for example, a range equal to or higher than the rotation speed corresponding to a vehicle speed of 105 km/h, a warning is issued.

[Problem that the invention attempts to solve]

However, when reading the numbers on the number ring 3 through the window hole 24 in the above conventional structure, the light beams of the illumination lamp 19 that is turned on at night, etc. leak through the gap R between the number ring 3 and the adjacent number ring 3, and this causes the number may be difficult to see, and the visibility of the entire instrument may be reduced. To prevent this, if the window hole 24 is made into a separate window hole 24 for each number as shown in Fig. 11, depending on the viewing direction, the number ring 3 may be difficult to see. This has disadvantages in that the numbers may not be readable or the design of the display board 18 may be unfavorable.

[Means for solving problems]

The purpose of this invention is to eliminate these inconveniences, and its gist is to rotatably insert a plurality of number rings into a holding shaft provided in the instrument frame.
A pinion for rotating the number wheel is engaged with the feed teeth of the number wheel, a display board is provided in front of the number wheel, an illumination light is provided behind the display board, and the rotation speed of the main shaft is provided on the instrument frame. A sensor capable of detecting the angular rotation position according to the rotation speed, etc. is provided via the holder,
The totalizer is characterized in that the numbers on the number ring can be viewed from a transparent section of the display board, and the holder is provided with a light leakage prevention member.

[Effect]

A light leakage prevention member provided on the holder that holds the sensor prevents light from leaking from the window hole.

〔Example〕

Figures 1 to 6 show embodiments of the present invention, Figures 1, 2, and 3 are the first embodiment, Figure 4 is the second embodiment, and Figures 5 and 6 are the third embodiment. .

Incidentally, the same reference numerals are given to the same parts as the conventional structure shown in FIGS. 7 to 11, and the explanation thereof will be omitted.

In the first embodiment shown in FIGS. 1, 2, and 3, 25 is a light leakage prevention member, and in this case, the light leakage prevention member 25 stands up integrally upward from the holder 22 that holds the sensor 21, and has a number ring. 3 and the adjacent number ring 3 below the gap R.

Since this first embodiment has the above-mentioned configuration, the light leakage prevention member 25 is located at a position corresponding to the gap R between the number wheels 3 and the adjacent number wheels 3. leakage of light can be prevented, and the visibility of the numbers on the number ring 3 can be improved.

The second embodiment shown in FIG. 4 shows another example of the holder 22, in which a light leakage prevention member 25 that integrally rises from the holder 22 is formed with a relief concave surface 26 facing the magnetic conductive body 16 and is held. Attachment pieces 27 for attachment to the instrument frame 1 are provided on both sides of the body 22.

The third embodiment shown in FIGS. 5 and 6 shows another example. In this case, a detection plate 28 is provided on the rotor 15, and a photo sensor, which is a sensor 21 consisting of a light emitting part and a light receiving part, is built in between the detection plate 28. A light leakage prevention member 25 is integrally formed upward with the U-shaped holding body 22, and is formed below the gap R.

The second and third embodiments can also provide the same effects as the first embodiment.

Incidentally, the light leakage prevention member 21 may be provided as a separate member and may be attached to the holder 22 with screws or the like.

In addition, in the above embodiment, the case where the totalizer is a zero-return type vehicle odometer is explained as an example, but it may also be applied to a non-zero-return type or an operating hour meter used in the instruments of agricultural machinery, etc. It is also possible to apply

In addition, in the embodiment described above, as shown in FIG.
However, if it is necessary to prevent light leakage through the other gap R', a light leakage prevention member 25 may be provided behind the gap R'.

[Effect of idea]

As described above, the present invention can prevent light from leaking through the window hole by using the light leakage prevention member provided on the holder that holds the sensor, and can improve the visibility of the numbers on the number ring.

As described above, the intended purpose can be fully achieved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a partial sectional view of the first embodiment, FIG. 2 is a partial plan view thereof, FIG. 3 is a partial perspective view thereof, and FIG. 4 is a partial cross-sectional view of the first embodiment. FIG. 5 is a partial side view of the third embodiment, FIG. 6 is a partial plan view thereof, FIG. 7 is an overall side view of the conventional structure, FIG. 8 is a partial plan view thereof, and FIG. Figure 9 is a partial perspective view thereof, Figure 10 is a partial plan view thereof,
FIG. 11 is a partial plan view of another example. DESCRIPTION OF SYMBOLS 1...Instrument frame, 2...Holding shaft, 3...Number ring, 5...Supporting member, 6...Pinion, 11...
... Main shaft, 18 ... Display board, 19 ... Lighting lamp, 21
...sensor, 22...holding body, 24...window hole,
25... Light leakage prevention member.

Claims (1)

[Scope of utility model registration request] A plurality of number wheels are rotatably inserted through a holding shaft provided on the instrument frame, a pinion for digitizing and rotating the number wheels is engaged with the feed teeth of the number wheels, and a display plate is placed in front of the number wheels. A lighting lamp is provided behind the display board, and a sensor capable of detecting the rotational speed of the main shaft and the angular rotation position according to the rotational speed is provided on the instrument frame via a holder, and the number wheel is 1. A totalizer in which the numbers can be viewed through a transparent section of a display board, characterized in that the holder is provided with a light leakage prevention member.