JPH02148285A - Zero resetting device for twin counter - Google Patents

Abstract

PURPOSE:To prevent the erroneous operation by turning the zero reset member of one counter to reset it to zero at the time of turning a zero reset shaft on its axis and turning the zero reset member of the other counter to reset it to zero at the timing of moving the zero reset shaft in the axial direction. CONSTITUTION:One operation body 27 turns a zero reset member 17 of one counter 2 to reset it to zero when a zero reset shaft 22 is turned on its axis, and the other operation body 24 turns a zero reset member 20 of the other counter 3 to reset it to zero when the zero reset shaft 22 is moved in the axial direction, and respective counters are selectively reset to zero, and in this case, the operation of the zero reset shaft 22 is limited to turning on its axis or movement in the axial direction by a lock mechanism 31 to prevent respective counters from being simultaneously reset to zero. Thus, this device has a good operability and does not require a wide installation space and is not restricted on arrangement by the other measuring instrument constituting parts.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a zero return device for twin counters used as odometers for vehicles such as automobiles and motorcycles.

[Conventional technology]

Conventional zero-returning devices for twin counters of this type include Japanese Patent Application Laid-Open No. 57-13CII+3 and Japanese Utility Model Application No. 611=174.
Publication No. 63, Publication of Utility Model Application No. 62-44361, Publication of Utility Model Application No. 1987
7-73620 and the like are known.

These conventional structures have two counters arranged in series or in two rows on the same axis, and the zero return member of one counter can be operated to return to zero by pushing the one zero return shaft in the axial direction. and an operating mechanism that rotates the zero return shaft and enables the zero return member of the other counter to return to zero by pushing in the axial direction at that position.

[Problem to be solved by the invention]

However, in the conventional system described above, the zero return operation of the zero return axis consists of the operation of pushing as is and the operation of rotating once and pushing at the surrounding position, and since both of these operations include the pushing operation, There is a risk of accidentally pressing the place you should press after turning, or turning and pressing the place you should press, and pressing after turning requires two movements. This has disadvantages in that the operability is low, the structure tends to be complicated, and a large installation space is required, which may impose restrictions on the arrangement of other instrument components.

[Means to solve the problem]

The purpose of the present invention is to solve these inconveniences.The gist of the present invention is to provide two counters on a frame, and to selectively connect each zero return member of the counter to one zero return axis. The zero return shaft is arranged in the frame so as to be rotatable about the axis and moved in the axial direction, and the zero return shaft is rotated about the axis so that one of the counters can be operated. One actuating body is provided to rotate the zero return member back to zero, and the other actuator is provided to rotate the zero return member of the other counter to zero by the axial movement operation of the actuating body, and the above-mentioned return A twin counter zero return device is characterized in that it is configured with a restraining mechanism that restrains the zero shaft to either rotation around the axis or movement in the axial direction.

[Effect]

When the zero return shaft is rotated around the axis, one operating body rotates the zero return member of one counter back to zero, and when the zero return axis is moved in the axial direction, the other operating body rotates the zero return member of the other counter to zero. The members are rotated back to zero, and each counter is selectively reset to zero.
At this time, the constraint mechanism restricts the zero return axis to either rotation around the axis or movement in the axial direction, thereby preventing simultaneous zero return operations of the respective counters.

〔Example〕

1 to 7 show an embodiment in which the present invention is applied to an automobile odometer, FIGS. 1 to 5 show the first embodiment, and FIGS. 6 to 7 show the second embodiment. be.

In the first embodiment shown in FIGS. 1 to 5, 1 is an instrument frame, and the instrument frame 1 includes two counters 2 and 1.
3 are arranged in parallel, and these counters 2 and 3
The support shafts 6 and 7 are arranged on the frames 4 and 5, and the support shafts 6 and
Four number wheels 2a and 3d are rotatably arranged on each of the number wheels 2a and 3d, and heart cams 2b and 2b are attached to the sides of the number wheels 2a and 3a.
3b are integrally formed, and each counter 2.
Input gears 2c and 3c are disposed on the support shafts 6 and 7 of No. 3 to face the number wheels 2a and 3a of the lowest digit, and one input gear 2
A drive gear 8 is meshed with the drive gear 8, and the rotation of the wheels of the automobile is transmitted to the drive gear 8.
c from the drive gear 8 to the distribution shaft 9, gears 10 and 11,
The rotation of the wheels is transmitted via a transmission shaft n and a gear similar to the drive gear 8 (not shown).

Reference numerals 13 and 14 are return members, and holding shafts 15 and 1 are arranged in parallel to the support shafts 6 and 7 on each frame 4 and 5.
6 is rotatably attached, and zero return members 13 and 14 are fixedly attached to holding shafts 15 and 16, respectively.
Zero return levers 13a and 14a are formed in each of the zero return members 13 and 14 in correspondence with the heart cams 2b and 3b, respectively, and are located between the respective number wheels 2a and 3a, and are located between the number wheels 2a and 3a of the lower digits. By rotating the number ring of the upper digit 'ii: l, /
Binions 13b and 14b for making 10 rotations and binions 13c and 14c for transmitting the rotation of the input gears 2c and 3c as they are to the number wheel of the lowest digit are provided.

Further, an actuating arm 17 is fixed to the protruding end of one of the holding shafts 15, and a spring hook is temporarily fixed to the end of the holding shaft 15, and there is no return between the frame 4 and the spring hook. Member 13
A coil spring 19 is hung thereon, and a coil spring 19 is hung thereon to return the number wheels 2a to their normal positions and rotationally connect each number ring 2a by means of pinions 13b and 13c.An operating arm 20 is also fixed to the protruding end of the other holding shaft 16. In addition, a spring hook similar to the plate 18 and coil spring 19 is provided with a plate (not shown) and a coil spring (not shown).
4 to the normal position, and the respective holding shafts 1 are
When rotating 5 and 16, the coil spring 19 and the coil spring (
(not shown), the zero return members 13 and 14 rotate to return to zero,
Binions 13b, 14b, 13c, 14c and number wheel 2a
・When separated from 3a, each return lever 13
Heart cams 2b and 3b correspond to a and 14a, respectively.
By this return-to-zero operation, each of the number wheels 2a and 3a rotates back to zero, and the displayed digits of the number wheels 2a and 3a are set to O, and the counters 2 and 3 are returned to zero.

Reference numeral 21 denotes an operating mechanism, in which operating arms 17 and 20 are connected to holding shafts 15 and 16 whose axes are offset from each other.
are fixed to each other with a phase difference of approximately 160 degrees, that is, one of the actuating arms 17 is provided downward and the other actuating arm 20 is provided obliquely upward, and the pressure receiving portions 17 a and 17 are provided at the tips of each of the actuating arms 17 and 20. 20 a, and is located between the operating arms 17 and 20 so that one zero return shaft 22 can be rotated around the axis and moved in the axial direction between the upper plate 1 a and the lower plate 1 b of the instrument frame 1. A knob (not shown) is attached to the tip of the zero return shaft 22 protruding outside, a retaining wheel train is fixed to the t portion of the zero return shaft n, and a slidable and locking notched groove is provided on the zero return shaft 22. 24a and the cutout surface IC of the instrument frame 1, the other actuating body 24 is inserted into the instrument frame 1 in a non-rotating state, and the D-shaped cut surface of the zero return axis n is slidable in the axial direction below the operating body 24. 22a and the D extraction hole 2Sa, the upper cylinder 6 is inserted in a non-rotating state with respect to the shaft, and the suppressing part 6 facing above the pressure receiving part 20a of the other operating arm 20 is inserted into the other operating arm 20. Protruding from the operating body 24, the zero return shaft 22
One operating body at the bottom of the! Slidable and D-shaped cut surface 2
2a and the D-shaped hole Z7a so as to be inserted into the shaft in a non-rotating state, and a compression spring n is interposed between one of the actuating bodies n and the cylindrical body 6. Actuation arm 1 of
A coil spring 30 is provided with a pressing part 29 protruding from the side of the pressure receiving part 17a of No. 7 and which brings the suppressing part 29 into contact with the inner surface 1d of the instrument frame 1 between one operating body and the lower plate 1b.
It is made of hanging paper.

Reference numeral 31 denotes a restraining mechanism, and the upper surface 1 of the instrument frame 1
It consists of a notch groove 1 f that faces the notch surface IC, and a guide protrusion 32 that protrudes into the upper cylinder body δ.

Since this first embodiment has a two-leg configuration, FIGS.
In the state shown in the figure, when the zero return shaft 22 is rotated clockwise as shown in FIG. Part 29
is the pressure receiving part 17 a of the operating arm 17 of one counter 2
, the holding member 1Il115 rotates and the zero return member 1
3 rotates back to zero, one counter 2 is returned to zero, and when this zero return shaft 22 is released, the zero return shaft n and one of the actuating bodies T are rotated counterclockwise by the coil spring 30. 3, the holding shaft is rotated back by the coil spring 19, and the zero return member 13 returns to the normal position. Also, when the zero return shaft 22 is pushed in the axial direction, the retaining ring 4 The other actuating body U is pushed against the compression spring Z, and the suppressing part n of the other actuating body 24 pushes the pressure receiving part 20a of the actuating arm 20 of the other counter 3, and its holding shaft 1
After 6 rotations, the zero return member 14 is rotated to return to zero, and the other counter 3 is returned to zero. When the zero return axis n is released, the other operating body 24 and the zero return member 14 are rotated by the compression spring n. The shaft 22 rises and returns until the retaining ring n comes into contact with the upper plate 1a, the holding shaft 16 returns to zero by a coil spring (not shown) similar to the coil spring 19, and the return member 14 returns to its normal position. Therefore, the two counters 2 and 3 can be selectively reset to zero by rotating one zero return axis n around the axis or moving it in the axial direction, improving operability and preventing erroneous operation. can be prevented.

At this time, the zero return shaft 22 is restrained by the restraint mechanism 31 to either rotation around the axis or movement in the axial direction,
In other words, once the zero return shaft 22 is rotated, its rotational position 1u
When pushed, the lower surface of the guide protrusion wing comes into contact with the second surface 1e of the instrument frame 1 as shown in Fig. 5, making it impossible to push it.Also, when the zero return shaft 22 is pushed once and then rotated, the guide protrusion 3
Since counter 2 is located between the notch surface IC and the notch surface 1f, it becomes unrotatable due to the contact between the side surface of the guide protrusion 32 and the notch groove 1f. Manipulation can be prevented.

The second embodiment shown in FIGS. 6 and 7 shows another structure of the operating mechanism 21, and the same parts as those of the first embodiment are given the same reference numerals. The other operating body 24 of the embodiment and the upper cylinder body 25 are integrated into an operating body U, and this operating body U has a D-shaped cut surface 22a and a D-shaped cut surface 22a.
The upper surface 1e is inserted into the return lever n so as to be able to slide in the axial direction through the pull-out hole 24b and to be prevented from rotating with respect to the shaft, and serves as a restraint mechanism 31.

L-shaped notch groove (
, and a guide protrusion 32 is formed on the other actuating body 24, and the other structures are the same.

This second embodiment also obtains the same effects as the first embodiment.

Note that the present invention is not limited to the operating mechanism 21 and restraint mechanism 31 shown in the two-legged embodiment.

〔Effect of the invention〕

As described above, in the present invention, when the zero return shaft is rotated around the axis, one of the operating bodies rotates the zero return member of one counter back to zero, and when the zero return axis is moved in the axial direction, the other operating body The zero return member of the other counter is rotated to return to zero, and each counter is selectively operated to return to zero, thereby preventing erroneous operation. At this time, the above-mentioned zero return shaft is rotated around the axis or moved in the axial direction by the restraint mechanism. It is possible to prevent each counter from returning to zero at the same time.

Therefore, the intended purpose can be fully achieved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a plan view of the first embodiment, FIG. 2 is a partial side sectional view thereof, FIG. 3 is a partial side view thereof, and FIG. 4 is a partial side view thereof. A plan view, FIG. 5 is a partial side view, FIG. 6 is a partial side sectional view of the second embodiment, and FIG.
The figure is a partial plan view thereof. 2.3...Counter, 4,5...Frame, 13.
14... Zero return member, 22... Zero return axis, 24.27.
- Working body, 31... restraint mechanism. 1986!

Claims (1)

[Claims] Two counters are disposed on a frame, and each zero return member of the counter can be selectively returned to zero using one zero return axis, The actuating body is arranged so as to be rotatable and axially movable, and one actuating body is disposed on the zero return shaft to rotate the zero return member of one counter back to zero by the rotation operation around the axis, and The other actuating body is arranged to rotate the zero return member of the other counter back to zero by a directional movement operation, and the constraint further restricts the zero return axis to either rotation around the axis or movement in the axial direction. A twin counter zero return device characterized in that it is configured by providing a mechanism.