JPH096938A - Integrating meter with reset-to-zero device - Google Patents

Abstract

PURPOSE: To provide an integrating meter with the reset-to-zero device which does not cause such trouble that a number wheel is locked even if a reset-to-zero knob is slightly pushed while the number wheel is in carry operation. CONSTITUTION: Plural number wheels 1 each having a gear part at one side part and two teeth 1b and 1c at another side part is pivoted rotatably and coaxially, and a heat-shaped cam 1d is provided almost in the center of the side part of the number wheel 1. A reset-to-zero shaft 4 is pivoted adjacently to the number wheels 1 in parallel to the shaft on which the number wheels are pivoted, and at part of the reset-to-zero shaft, a pinion 6 having axially long teeth 6 and axially short teeth 6b arranged by turns is pivoted engaging both the two teeth 1b and 1c and gear part of an adjacent number wheel 1. At a part of the reset-to-zero shaft 4, a reset-to-zero lever 5 for reset-to-zero operation is provided and the heart-shaped cam 1d is pushed with a reset-to-zero lever 5 by rotating the reset-to-zero shaft 4 to reset the respective number wheels 1 to zero. A tapered surface 1e that the short teeth 6b of the pinion 6 can move beyond is formed inside the teeth on te anti-rotation side of the two teeth 1b and 1c of the number wheel 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a mileage integrating meter of an automobile, etc., and is adapted to rotate a zeroing shaft equipped with a zeroing lever to return the display of a numeral wheel to zero. Regarding the total.

[0002]

2. Description of the Related Art Generally, as shown in FIG. 11, a totalizer with a zero-reset device is provided with a gear portion 22 and a heart-shaped cam 23 on a plurality of numeral wheels 21 arranged in parallel on a frame and pivotally supported. ,
A zero-reset shaft 24 is rotatably arranged in a certain angle range in the lateral axial direction of the numeral wheel 21, and a zero-reset lever 25 engageable with the heart-shaped cam 23 is provided on the zero-reset shaft 24. A pinion 26 that can mesh 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, in a normal state, as shown in FIG. 11A, the zeroing shaft 24 pulls up the zeroing lever 25 and the pinion 26 of the numeral wheel 21. When the gear portion 22 is brought into the engageable state and a zero-return knob (not shown) is pushed, the zero-return shaft 24 is rotated clockwise as shown in FIG.
The pinion 26 is separated from the gear portion 22, and the zero-return lever 25 pushes the heart-shaped cam 23 of the numeral wheel 21 at its tip end, whereby the numeral wheel 21 is returned 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.

Therefore, for example, as shown in FIG. 12 (A), when the carry-out operation is started during the operation of the integrating meter and the long teeth 26a of the pinion 26 are meshed with the gear portion 22, the zero-return knob. Is temporarily pushed a little for some reason, as shown in FIG. 12 (B), the zeroing shaft 24 temporarily turns slightly clockwise and the pinion 26 moves to the gear portion 22.
Away from it, the pinion 26 rotates about 45 ° either way,
Directly again, as shown in FIG. 12C, the pinion 26 is engaged with the gear portion 2.
2, but at this time the long teeth 26a of the pinion 26
Instead, the short teeth 26b mesh with the gear portion 22.

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 carries out a carry operation, but when the short teeth 26b of the pinion 26 mesh with the gear portion 22 as shown in FIG. 12 (C), the numeral wheel 21 is locked and a normal carry operation is possible. There was a problem that disappeared.

The present invention has been made in view of the above points, and does not cause a problem that the number wheel is locked even when the zero-return knob is slightly pushed during the carry operation of the number wheel. It is an object to provide an integrating meter with a zero device.

[0008]

In order to achieve the above object, a totalizer with a zeroing device according to the present invention has a gear portion on one side and two teeth on the other side, and the same axis is provided. A plurality of number wheels that are rotatably supported, a heart-shaped cam that is provided substantially at the center of the side portion of the number wheel, and parallel to and adjacent to the axis on which the plurality of number wheels are pivotally supported. 2 shafts that are adjacent to each other and have a long tooth in the axial direction and a short tooth in the axial direction alternately arranged while being supported by a part of the zeroing shaft. A pinion that meshes with teeth and a gear portion and a zeroing lever for zeroing operation provided on a part of the zeroing shaft are provided. In a totalizer with a zeroing device that pushes a cam to zero each number wheel, of the two teeth of the number wheel, A, wherein the short teeth glue beyond capable tapered surface of the pinion is formed.

Here, the taper surfaces of the teeth on the counter rotation side of the two teeth can be formed by notching the inside of the teeth in a tapered shape. Further, the tapered teeth are formed so that the long teeth of the pinion can be engaged.

[0010]

[Operation / Effect] In the integrating meter with the zero-reducing device having such a configuration, when the integrating operation of the integrating meter is started and the carry operation is started, and the long teeth of the pinion are meshed between the two teeth, the zeroing operation is performed. If the knob is temporarily pushed incompletely for some reason, the zeroing shaft 4 rotates slightly and the pinion separates from the two teeth,
The pinion rotates about 45 ° in either direction and again immediately the pinion engages the two teeth. At this time, not the long teeth of the pinion but the short teeth mesh between the two teeth.

However, since the side on which the rotational force of the numeral wheel is transmitted to the pinion, that is, the counter-rotation side tooth of the two teeth is formed with a tapered surface over which the short teeth can cross, the numeral wheel is moved by the carry operation. As the wheel rotates, the short teeth of the pinion can cross over the tapered surface. As a result, the number ring is 2
The engagement between the single teeth and the short teeth of the pinion can be disengaged, and the number wheel can be operated normally without locking the number wheel (pinion) at the time of carry.

[0012]

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

FIG. 1 shows a front view of a speedometer-equipped integrating meter for an automobile, FIG. 2 shows a left side view thereof, and FIG. 3 shows a bottom view thereof. The integrating meter with a zeroing device is arranged in the lower stage in FIG. 1, and four numeral wheels 1 are rotatably supported by a shaft 9 on a 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.

The four numeral wheels 1, the cover disk 7, and the gear 8 are supported side by side on a shaft 9, but each numeral wheel and the like can be slightly moved in the axial direction, so that the space between the cover plate 7 and the frame is small. A coil spring is externally fitted to the shaft 9 of FIG. 3 and each spring, etc. is biased to the right by this spring to prevent rattling. Reference numeral 19 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 rotationally driven according to the traveling distance.

As shown in FIGS. 4 to 6, a gear portion 1a having continuous teeth is provided on the right side of each numeral wheel 1 and two teeth 1b and 1c are provided on the left side thereof, and a left side surface thereof is provided. A heart-shaped cam 1d for zeroing is provided substantially in the center. Number ring 1
Normally, the counterclockwise rotation in FIG. 5 is carried and the carry is carried, but the inner side of the counter rotation side tooth 1c of the two teeth is cut out obliquely, and the tapered surface 1e is formed there. It

As shown in FIGS. 4 and 7, the tapered surface 1e is formed inside the two teeth 1c so as to open laterally, and when the short teeth 6b of the pinion 6 described later mesh, The tips of the teeth 6b come into contact with the tapered surface 1e to disengage the short tooth 6b from between the two teeth 1b and 1c to prevent locking, and when the long tooth 6a of the pinion 6 normally meshes, the tapered surface 1e
Rather, the tapered surface 1 is engaged so as to engage the side surfaces of the two teeth 1c and normally transmit the rotational force of the numeral wheel 1 to the pinion 6.
e is formed on the two teeth 1c.

The zero-reset shaft 4 is rotatably supported on the frame 10 in the axial direction of the side of the numeral wheel 1 within a certain angle range.

A zeroing lever 5 engageable with the heart-shaped cam 1d is provided on the zeroing shaft 4 so as to be inserted between the respective numeral wheels. Further, on the shaft 16 supported away from the central axis of the zero-reset shaft 4, three pinions 6 capable of meshing with the gear portion 1a of each numeral wheel 1 and the two teeth 1b and 1c are rotatably supported. While being pivotally supported, the gear part 1 of the rightmost number wheel 1
A small pinion 17 that can mesh with a and the gear 8 is rotatably supported. In other words, the rotation of the gear 8 is transmitted to the number wheel 1 on the left side thereof via the small pinion 17, and at the time of the carry associated with the rotation of the number wheel 1, each of the wheels positioned between the adjacent number wheel 1 is positioned. The number wheel on the left side is configured to carry and rotate via the pinion 6.

Each pinion 6 has a long tooth 6a and a short tooth 6b which are long in the axial direction in order to prevent unnecessary rotation of the numeral wheel 1.
Are arranged alternately. Further, the pinion 6 is provided with a rectangular shaft portion, and the leaf spring portion 18 extending from the shaft 4 is elastically abutted on one surface of the rectangular shaft portion, and the pinion 6 moves 90 times when the numeral wheel 1 is carried. Rotate by °. Each pinion 6 having such a configuration is arranged so as to mesh with the two teeth 1b and 1c of the adjacent right-hand numeral wheel 1 and the gear portion 1a of the left-hand numeral wheel 1.

As shown in FIGS. 1 and 2, 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 at the tip of the crank portion 4a. Are provided so as to project laterally.

A guide portion 13 for supporting a zeroing knob 15 for zeroing operation is provided on an extended portion of the frame 10 near the engaging convex portion 4b, and a plate portion 14 below the guide portion 13 is provided. A guide hole 14a is formed in the.

The zeroing knob 15 is provided at the bottom of the rod-shaped knob portion.
The engaging portion 15b is provided so as to project laterally. The engaging portion 15b is provided with a recess for inserting and engaging the engaging convex portion 4b. 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 on the peripheral edge of the guide hole 14a of the frame plate portion to give a feeling of moderation. Board 14
The coil spring 12 is inserted between the base of the engaging portion 15b and the engaging portion 15b.

Therefore, when the zero-return knob 15 is pushed in,
As shown in FIG. 2, the engaging portion 15b compresses the coil spring 12 and moves to the left, and at this time, the engaging convex portion 4b engaging with the concave portion of the engaging portion 15b and the crank portion 4a are linked. The zeroing shaft 4 rotated in the counterclockwise direction in FIG. 2 pushes the zeroing lever 5 between the respective number wheels, and the pinion 6 and the small pinion 17 pivotally supported by the shaft 16 are connected to the number wheels 1 and 1. It operates so as to be separated from the gear 8.

Next, the operation of the integrating meter with the zero-reset device having the above configuration will be described. When the zero-return shaft 4 is pushed in order to zero the integrating counter, the engaging portion 15b also moves in the direction of the arrow in FIG. 2, and the engaging convex portion 4b and the crank portion 4a engaging with the engaging portion 15b. The zero-reset shaft 4 rotates through a predetermined angle in the counterclockwise direction in FIG.

By the rotation of the zeroing shaft 4, each pinion 6 is separated from the gear portion 1a of the numeral wheel 1 and the two teeth 1b and 1c, and the small pinion 17 is separated from the gear 8 and the gear portion 1a of the numeral wheel 1. At the same time, the zeroing lever 5 acts so as to push the heart-shaped cam 1d of the numeral wheel 1 at its tip, whereby the four numeral wheels 1 are returned to the zero position.

On the other hand, during the integrating operation of the integrator, the carry operation is started and the long tooth 6a of the pinion 6 has two teeth 1b and 1c.
When the zeroing knob 15 is temporarily pushed a little for some reason when meshed with each other, the zeroing shaft 4 temporarily turns slightly and the pinion 6 separates from the two teeth 1b and 1c. When the pinion 6 rotates about 45 ° in either direction and the pinion 6 immediately engages with the two teeth 1b and 1c again, as shown in FIG.
The teeth 1b and 1c are meshed with each other.

However, the inner side of the two teeth 1c on the side for transmitting the rotational force of the numeral wheel 1 to the pinion 6, that is, the counter rotation side (short tooth 6)
Since the tapered surface 1e is formed at the position where b comes into contact), when the numeral wheel 1 is rotated by the carry operation, the short teeth 6b of the pinion 6 are raised to the tapered surface 1e as shown in FIG. At this time, the pinion or the number wheel is slightly tilted, so that the short tooth 6b can cross over the double tooth 1c as shown in FIG.

As a result, the numeral wheel 1 is shown in FIGS. 9 to 10.
As shown in FIG. 2, the two teeth 1c and the short teeth 6b of the pinion 6
The engagement can be disengaged, and the numeral wheel 1 can be normally carried in the carry operation without locking the pinion 6 when carrying the carry.

In the above embodiment, the case where each numeral wheel 1 makes a positive rotation in the direction of the arrow in FIG. 8 etc. when the vehicle travels forward has been described, but since each numeral wheel 1 makes a reverse rotation when traveling backward, this In order to prevent the number wheel (pinion) from being locked during such reverse rotation, the two teeth 1b on the counter rotation side during reverse rotation are provided.
A tapered surface may be provided by notching the inside of the taper.

[Brief description of 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 an enlarged front view of a numeral wheel 1.

FIG. 5 is a left side view of the numeral wheel 1.

FIG. 6 is a perspective view of the numeral wheel 1.

FIG. 7 is a cross-sectional view of an improper meshing state of the two teeth of the numeral wheel 1 and the short teeth of the pinion 6.

FIG. 8 is a cross-sectional explanatory diagram showing an improper meshing state of the short teeth of the pinion and the two teeth of the numeral wheel.

FIG. 9 is an explanatory cross-sectional view showing an incorrect meshing state of the short teeth of the pinion and the two teeth of the numeral wheel.

FIG. 10 is a cross-sectional explanatory view showing an improper meshing state of the short teeth of the pinion and the two teeth of the numeral wheel.

FIG. 11 is a cross-sectional explanatory view showing a zeroing operation of the conventional integrating meter.

FIG. 12 is an explanatory cross-sectional view showing a zero-return operation of a conventional integrating meter.

[Explanation of symbols]

 1-Numeral wheel, 1a-gear part, 1b, 1c-2 teeth, 1d-heart-shaped cam, 1e-tapered surface 4-resetting shaft, 5-resetting lever, 6-pinion, 6a-long tooth, 6b -Short teeth, 15-zeroing knob.

Claims (3)

[Claims] 1. A plurality of numeral wheels each having a gear portion on one side and two teeth on the other side and rotatably supported on the same shaft, and a substantially center of a side portion of the numeral wheels. A heart-shaped cam, a zero-reset shaft rotatably supported in parallel with and adjacent to the plurality of number wheels, and a part of the zero-revolution shaft. At the same time, the long tooth in the axial direction and the short tooth in the axial direction are alternately arranged, and the two pinion of the adjacent numeral wheel and the pinion meshing with the gear portion, and a part of the zeroing shaft. A zeroing lever provided for zeroing operation, wherein the zeroing shaft is rotated, and the heart-shaped cam is pushed by the zeroing lever to zero each number wheel. , A tapered surface is formed inside the two teeth of the numeral wheel on the side opposite to the rotation side so that the short teeth of the pinion can pass over. An integrating meter with a zeroing device characterized by being made. 2. The integrating meter with a zero-reset device according to claim 1, wherein the tapered surfaces of the teeth on the counter rotation side of the two teeth are formed by notching the inside of the teeth in a tapered shape. 3. The integrating meter with a zero-reset device according to claim 1, wherein the tapered teeth are formed so that the long teeth of the pinion can be engaged with each other.