JPH0916741A - Reset-to-zero device for integrating meter - Google Patents

Abstract

PURPOSE: To provide a reset-to-zero device for an integrating meter by which a digital ring can be prevented from being locked even when a reset-to-zero operation is uncompletely performed. CONSTITUTION: This reset-to-zero device is provided with a reset-to-zero shaft 4 on which an engage projecting part 4b is provided at one end through a crunk part 4a and a digital ring 1 of the integrating meter is reset to zero by revolutions, a reset-to-zero knob 5 which has an engage part 15b to be engaged with the engage projecting part 4b of the reset-to-zero shaft 4, is held by a guide part 13 so as to be axially slid and is provided with an elastic projection 15c for limitation feeling generation, and coil spring 12 for energizing the reset-to-zero knob 15 in resetting direction, and the reset-to-zero shaft 4 is revolved and reset to zero by the push-in operation of the reset-to-zero knob 15. The elastic projection 15c for limitation feeling generation is provided at a certain position, where the feeding of limitation is generated, in the latter half of push-in stroke of the reset-to-zero knob 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a zeroing device for an integrating meter, which pushes a zeroing knob to rotate a zeroing shaft with a lever to return the indication of the numeral wheel to zero.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 6, a zeroing device for an integrating meter has a plurality of numeral wheels 21 arranged side by side on a frame and axially supported by a gear portion (two teeth) 22 and a heart shape. A cam 23 is provided, and a zero-reset shaft 24 is arranged rotatably in a side angle direction of the numeral wheel 21 within a certain angle range. 25, and a pinion 26 capable of meshing with the gear portion 22 of the numeral wheel 21 is supported by a shaft 27.

[0003]

In the zeroing device having such a structure, the zeroing shaft 24 normally pulls up the zeroing lever 25 and the pinion 26 of the numeral wheel 21 as shown in FIG. 6 (A). When the gear portion 22 is brought into the engageable state and a zero-reset knob (not shown) is pushed, the zero-return shaft 24 is rotated clockwise as shown in FIG. 6B, which causes the pinion 26 to rotate. Along with moving away from the part 22, the zero return lever 2
The numeral 5 pushes the heart-shaped cam 23 of the numeral wheel 21 at its tip to return the numeral wheel 21 to the zero position.

However, in order to prevent unnecessary rotation of the number wheel 21, the pinion 26 has long teeth 2 which are long in the axial direction.
6a and short short teeth 26b are alternately arranged, a rectangular shaft portion 26c is provided on the shaft portion, and a leaf spring 28 is elastically abutted on the rectangular shaft portion 26c.

Further, an elastic projection for generating a click feeling is provided on the lower portion of the zero-return knob for rotating the zero-reset shaft 24, and when the zero-reset knob is started to be pushed, the peripheral portion of the guide hole of the bearing portion is pressed. The elastic protrusions hit the to give a feeling of moderation.

Therefore, for example, as shown in FIG. 7 (A), when the carry-out operation is started during operation of the integrating meter and the long teeth 26a of the pinion 26 mesh with the gear portion 22, the zero-return knob. May inadvertently push in slightly. In such a case, as shown in FIG. 7 (B), the zeroing shaft 24 temporarily rotates slightly clockwise and the pinion 26 separates from the gear portion 22, and the pinion 26 rotates about 45 ° in either direction. Then, again, as shown in FIG. 7C, the pinion 26 engages with the gear portion 22, and at this time, the long teeth 2 of the pinion 26 are engaged.
The short tooth 26b meshes with the gear portion 22 instead of 6a.

Under normal conditions, the long teeth 26 of the pinion 26
When a is engaged with the gear portion 22, the number wheel 2 is normally operated.
1 rotates to perform the carry operation, but when the short tooth 26b of the pinion 26 meshes with the gear portion 22 as shown in FIG. 7C, the numeral wheel 21 is locked and the normal carry operation can be performed. There was a problem that disappeared.

Further, when the zero-return knob is pushed to perform the zero-return operation, when the display position of the numeral wheel is between "0" and "9", the pushing of the zero-return knob is stopped and the zero-return knob is kept as it is. Even when the gears are separated from each other to bring about an incomplete zeroing state, the short teeth 26b of the pinion 26 mesh with the gear portion (two teeth) 22, and the number wheel 21
There was a problem that was locked.

The present invention has been made in view of the above points, and provides a zeroing device for an integrating meter which can prevent the number wheels from being locked even if the zeroing operation is performed incompletely. The purpose is to

[0010]

In order to achieve the above object, the zero-reset device of the present invention is provided with an engaging convex portion at one end through a crank portion, and zeroes the number wheel of the integrating meter by rotation. A zero-reduction shaft having a zero-reset shaft and an engagement portion that engages with an engagement protrusion of the zero-reduction shaft, which is slidably held in the axial direction by a guide portion and provided with an elastic protrusion for generating a moderation feeling. In a zeroing device of an integrating meter, which is provided with a knob and a coil spring for urging the zeroing knob in the returning direction, is used to rotate the zeroing shaft by pushing operation of the zeroing knob to generate a feeling of moderation. The elastic protrusion is provided at a position where a click feeling is generated in the latter half of the push-in stroke of the zero-reset knob.

Here, regarding the position of the elastic protrusion, when the zero return operation is performed by pushing the zero return knob, the display position of the numeral wheel is "0".
It is set to a position where a feeling of moderation is generated between "9" and "9".

[0012]

[Operation / Effect] In the zeroing device of the integrating meter having such a configuration, when the user pushes the zeroing knob in order to perform the zeroing of the integrating meter, the zeroing shaft is rotated by the action of the crank portion. As a result, the pinion moves away from the gear part of the number wheel, and the zeroing lever pushes the heart-shaped cam of the number wheel at its tip to return the number wheel to the zero position.

In the present zero-reset device, since the elastic projection for generating the click feeling is provided at a position where the click feeling is generated in the latter half of the pushing stroke of the zero-reset knob, the zero-reset knob may be stopped in the middle of pushing. Even so, you can not stop at the second half position where a feeling of moderation occurs and you will push the knob as it is.

For this reason, even if the pushing operation of the zero-return knob is stopped midway and an incomplete zero-reset occurs, the latter half of the pushing stroke of the zero-return knob, that is, the display position of the numeral wheel is "0".
Since the zero-return operation does not stop between “9” and “9”, the short teeth of the pinion do not mesh with the two teeth of the number wheel, and the number wheel can be prevented from locking.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a front view of an integrating meter with a zeroing device, FIG. 2 shows a left side view thereof, and FIG. 3 shows a bottom view thereof. Reference numeral 10 is a frame of an integrating meter, and four number wheels 1 are rotatably supported by a shaft 9 on the frame 10. A gear 8 having teeth on both sides is pivotally supported at the right end of the four numeral wheels 1, and a cover disc 7 is pivotally supported at the left end thereof. 1
Reference numeral 9 denotes a drive unit such as a motor. The output shaft of the drive unit 19 meshes with the gear 8 via a small gear, and the gear 8 is driven in accordance with the traveling distance.
Is driven to rotate.

A continuous gear is provided on the right side of each numeral wheel 1, and two teeth and a heart-shaped cam for zeroing are provided on the left side. Reference numeral 4 denotes a zero-reset shaft rotatably supported on the frame 10 in the lower axial direction of the numeral wheel 1 within a certain angle range.

A zeroing lever 5 that can be engaged with a heart-shaped cam is provided on the zeroing shaft 4 in correspondence with each numeral wheel 1. Further, a pinion 6 capable of meshing with the gear portion of each numeral wheel 1 and two teeth is arranged on a shaft 16 supported away from the central axis of the zero-reset shaft 4. Further, on the right side of the pinion 6, a small pinion 17 capable of meshing with the gear portion of the rightmost numeral wheel 1 and the gear 8 is rotatably supported on the shaft 16.

When the gear 8 rotates, the rotation is transmitted to the number wheel 1 on the left side through the small pinion 17, and at the time of the carry accompanying the rotation of the number wheel 1, the rotation of the number wheel 1 adjacent to the number wheel 1 is performed. This is a structure in which the number wheel 1 on the left side is carried and rotated via each pinion 6 located between them.

As shown in FIG. 3, each pinion 6 has long teeth 6 which are long in the axial direction in order to prevent unnecessary rotation of the numeral wheel 1.
a and short short teeth 6b are alternately arranged. Further, the pinion 6 is provided with a rectangular shaft portion, and the leaf spring portion 18 extending from the shaft 4 is elastically contacted with one surface of the rectangular shaft portion.
The pinion 6 rotates by 90 ° when the numeral wheel 1 is carried.

One end of the zero-reset shaft 4 projects laterally of the frame 10, a crank portion 4a is provided there, and a cylindrical engaging convex portion 4b is provided laterally at the tip of the crank portion 4a.

A guide portion 13 for supporting a zero-reset knob 15 for zero-reset operation is provided on the extended portion of the frame 10 near the engaging protrusion 4b, and the lower guide portion 13 is provided. A guide hole 13a is formed in this.

As shown in FIG. 4, the zero-return knob 15 is constructed by laterally projecting an engaging portion 15b on the lower portion of a rod-shaped knob portion 15a. The engaging portion 15b is provided with a concave portion, and the engaging convex portion 4b at the tip of the crank portion engages with the concave portion.

Further, an elastic projection 15c is provided on the lower portion of the zero-return knob 15 so as to project laterally, and when the knob is pushed down, the elastic projection 15c abuts the peripheral edge of the guide hole 14a of the guide portion 13 to give a feeling of moderation. Give rise to. The coil spring 12 is inserted between the guide portion 13 and the base portion of the engaging portion 15b.
In addition, the elastic projection 15c for generating a feeling of moderation is provided with the zeroing knob 15
When is pushed in, it is formed at a position where a feeling of moderation occurs in the latter half of the pushing stroke. Further, the elastic protrusion 15
The position of c is set when the display position of the numeral wheel 1 is between "0" and "9" by the rotation of the zero return shaft and the zero return lever when the zero return knob 15 is pushed in to perform the zero return operation. , It is set at a position where a moderation feeling occurs.

In the zero-reducing device of the integrating meter having such a configuration,
When the user pushes the zero-return knob 15 in order to perform zero-reduction of the totalizer, the crank portion 4a engaged with the engaging portion 15b.
By the action of, the zero-reset shaft 4 rotates. Along with that, each pinion 6 supported by the shaft 16 separates from the gear portion and the two teeth of each numeral wheel 1, the small pinion 17 separates from the gear wheel 8, and the zeroing lever 5 at each tip portion of each numeral wheel. By pressing the heart-shaped cam 1 of 1, each numeral wheel 1 is returned to the zero position.

The relationship between the pushing stroke and the pushing load of the zeroing knob 15 at the time of the zeroing operation changes as shown in the graph of FIG. 5, for example.
Since c is provided at a position where a click feeling is generated in the latter half of the pushing stroke of the zero-reset knob 15, even if the zero-reset knob 15 may be stopped in the middle of pushing, it is stopped in the latter half position where the click-feeling occurs. It is not possible to push the knob 15 to the end. The length of the stroke, the magnitude of the pushing load, etc. may be set arbitrarily.

Therefore, even if the pushing operation of the zero-return knob 15 is stopped halfway and the incomplete zero-reset occurs, the latter half of the pushing stroke of the zero-return knob 15, that is, the display position of the numeral wheel 1 is "0". Since the zero-return operation does not stop when it is between "9" and "9", the short teeth 6b of the pinion 6 are
It is possible to prevent the number wheel 1 from locking without engaging with the teeth.

[Brief description of the drawings]

FIG. 1 is a front view of an integrating meter with a zeroing device according to an embodiment of the present invention.

FIG. 2 is a left side view of the integrator.

FIG. 3 is a bottom view of the integrator.

FIG. 4 is a cross-sectional view of a zeroing knob 15.

FIG. 5 is a graph showing a pushing stroke of the zero-return knob and its pushing load.

FIG. 6 is a cross-sectional explanatory view showing a zero-return operation of the zero-return device.

FIG. 7 is a cross-sectional explanatory view showing an incorrect meshing state of the zero-reset device at the time of zero-reset.

[Explanation of symbols]

 1-Numeral wheel, 4-Resetting shaft, 5-Resetting lever, 6-Pinion, 15-Resetting knob, 15c-Elastic protrusion.

Claims (2)

[Claims] 1. A zero-return shaft, which has an engaging protrusion at one end thereof via a crank portion and zeroes the numeral wheel of the integrating meter by rotation, and an engagement which engages with the engaging protrusion of the zero-return shaft. A zeroing knob that has a portion, is slidably held in the axial direction by the guide portion, and is provided with an elastic protrusion for generating a click feeling, and a coil spring that biases the zeroing knob in the returning direction. In the zeroing device of the integrating meter, wherein the zeroing shaft is rotated by the pushing operation of the zeroing knob to perform zeroing, the elastic projections for generating the detent feeling are detented in the latter half of the pushing stroke of the zeroing knob. A zero-reducing device for an integrator, which is provided at a position where a feeling is generated. 2. The position of the elastic projection is such that when the zero-return operation is performed by pushing the zero-return knob, a sense of moderation occurs when the display position of the numeral wheel is between "0" and "9". The zero-reset device according to claim 1, which is set.