JPH03260890A - Return-to-zero mechanism for integrator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a zero return mechanism in a totalizer that returns the totalization display to the state of the zero point position.

[Prior art]

Conventionally, a heart cam has been used as the zero return mechanism for the totalizing hand.

That is, FIGS. 6 and 7 are drawings showing a zero-return meter using a heart cam, in which a support shaft 82 and a zero-return shaft 83 are arranged in parallel on an instrument frame 81, and the support shaft 82 A plurality of number rings 84 are arranged on the numerals 84. A heart cam 85 is formed on each number ring 84. In addition, the above-mentioned zero return axis 83
An abbreviated zero return member 87 is provided. The zero return member 87
A return engagement portion 871 and a pinion 88 are provided. The pinion 88 rotates the number ring 84 to display the total value.

In order to return the integration display to zero, as shown in FIG. . As a result, the zero return engaging portion 871 is brought into contact with the heart cam 85, and the number ring 84 is rotated back to zero by the engagement action between the two.

In FIG. 6, reference numeral 93 indicates a torsion coil spring for returning the operating lever 92 to its original state.

[Problem to be solved]

However, in the conventional zero return mechanism, the operating lever is pressed and rotated in the same direction as the operating direction by the operation transmission section of the zero return operation knob. For this reason.

The height of the totalizer increases by the thickness of the operation transmission section (indicated by H in FIG. 6).

In addition, as mentioned above, while the pinion rotates the number wheel to digit, the number wheel is also rotated back to zero by the engagement action of the zero return engagement part and the heart cam, so the structure of the totalizer itself becomes complicated.

For this reason, nine-piece assembly was not convenient and was disadvantageous in terms of cost.

Furthermore, in the structure as described above, it was difficult to provide a switch section. For this reason.

It was also not possible to display a warning light using the switch after driving a certain distance.

In view of the above problems of the prior art, the present invention is compact, easy to assemble, and has a switch function. This is an attempt to provide a zero return mechanism in a totalizer.

Solution to Problem C] The present invention provides a zero return operation knob that can move forward and backward and has a tapered operation transmission part that expands in the backward direction, and a return operation knob that slides on the operation transmission part of the zero return operation knob to transmit its operating force. a rotatable actuation lever having an operation receiving section that converts the rotational force into a rotational force in an approximately 90 degree angle direction, and an operation transmitting section forming an acute angle between the operation receiving section; The details of the actuating receiver, which is arranged to be movable forward and backward in the direction facing the transmission part and rotatable around the axis, are shown in detail. a detection switch section having a rotation return means such as a torsion coil spring that returns the details to the state of zero point position I; The zero return mechanism in the totalizer is characterized by the following features:

In the present invention, the taper of the operation transmission section is not limited to a flat shape, but may be a curved shape.

Further, as the rotation return means, a torsion coil spring,
There are spiral springs, motors, etc.

Also, in the present invention, does the above operation work? It is preferable that a leaf spring portion for return movement be integrally formed on the shaft.

This makes it possible to reduce the number of parts.

The detection switch section is used to take out an ON/OFF signal as a warning signal when the vehicle travels a certain distance.

The detection switch part has 1 actuating receiver which is turned ON by the rotation of the shaft part.
state or OFF state.

Although it is desirable to arrange wiring patterns and contact parts,
It can also be used as an indicator rather than a switch detection.

Further, it is desirable that each of the above-mentioned zero return operation knob, operating lever, and detection switch section be able to be set in the case and bracket.

The ease of assembly is greatly improved.

Note that the present invention relates to the totalizer 9, for example, a distance detector.

It can be widely applied as a zero return mechanism for devices such as rotation angle detectors and integrated time detectors.

[For production]

The present invention is configured as described above.

Normally, the operation receiver of the detection switch section and the rotation transmission gear of the integrating needle main body mesh with each other, and the gear of the rotation receiver rotates.

As the gear rotates, the shaft portion of the rotary receiver rotates in conjunction with the rotation of the gear to perform distance detection, etc. In this case, the switch in the detection switch section is in an ON state or an OFF state.

In order to return the totalizer to zero, the user presses the zero return operation knob. As a result, the operation transmission section of the zero return operation knob and the operation receiver of the actuating lever slide, and the operating force of the operation transmission section is converted into rotational force of the operation receiver in a direction of about 90 degrees. do. in this case.

In the actuation lever, since the operation receiver part and the operation transmission part form an acute angle, the operation transmission part, like the operation receiver part, also receives the operating force of the operation transmission part and the rotational force in the direction of approximately 90 degrees. converted.

In the detection switch section, the shaft section of the actuation receiver is pressed and moved by the rotational force of the three actuation transmission sections. As a result, in the rotary receiver, the gear and the rotation transmission gear are disengaged, and at the same time, the switch in the detection switch section is turned OFF or ON.

In this way, both gears became disengaged. In the free state, the shaft portion of the first actuating receiver returns to the zero point position by a rotational return means such as a torsion coil spring.

〔effect〕

According to the present invention, the operating force of the zero return operation knob can be reduced to about 90
Since the rotational force of the actuating lever is converted into the degree-angle direction, the height of the totalizer can be reduced.

In addition, the rotary receiver of the zero return mechanism meshes with the rotation transmission gear linked to the totalizer body, so it is easy to assemble the 5. Also, the detection switch section can be used as a warning signal when traveling a certain distance. ON.

It is also possible to extract an OFF signal.

Therefore, according to the present invention, the device is compact, easy to assemble, and has a switch function. A zero return mechanism for the totalizer can be provided.

〔Example〕

The zero return mechanism of this example will be explained using FIGS. 1 to 5.

In this example, the zero return mechanism of the present invention is applied to the distance detector 7 as an integrating meter. The distance detector 7 consists of a zero return mechanism 5 and an integrating needle body 6, as shown in FIG.

Further, the integrating needle main body 6 includes a total counter 61 and a trip counter 63.

The zero return mechanism 5 of this example, as shown in FIGS. 1 and 2,
First, there is a zero return operation knob 1 that can be moved back and forth and has a tapered operation transmission section 13 that expands in the backward direction.

A rotatable operating lever having an operation receiving portion 21 which is slidable on the operation transmitting portion 13 of the zero return operation knob 1, and an operation transmitting portion 22 forming an acute angle between the operating receiving portion and the portion 21. 2. Further, the actuating lever 2 can move forward and backward in a direction facing the actuation transmitting portion 22.

The actuating receiver, which is arranged to be rotatable around the axis, has a shaft portion 32. Further, the actuating receiver has a gear 33, which is a ring formed by the shaft portion 32, and a torsion coil spring 35 as a rotation return means for returning the ring portion 32 to the zero point position after being rotated once. It consists of a switch section 3. The gear 33 of the rotary receiver is disposed so as to be able to mesh with a rotation transmission gear 50 interlocked with the totalizer main body 6.

The zero return mechanism 5 of this example is disposed on the side of the totalizer main body 6 (lower part in FIG. 5), as shown in FIG. A bracket 4 for attaching the zero return operation knob 1 and the operating lever 2 is fixed to the side surface of the totalizer main body 6. As shown in FIGS. 1 and 2, the bracket 4 includes a pair of bearing portions 411 and 412, a flange portion 42, and a boss 43.

A notch portion 410 is provided in the upper bearing portion 411 . Further, the boss 43 is provided with a claw portion 430.

The zero return operation knob l is as shown in FIG.

Consists of an operating rod portion 11, a ring portion 12, and an operation transmitting portion 13,
A coil spring 14 is wound around the shaft portion 12 to bias the zero return operation knob 1 in the return direction.

The above-mentioned zero return operation knob 1 has its upper end portion cut out into the above-mentioned notch 4.
It is assembled to the bracket 4 by inserting it into the bracket 10. Further, as shown in FIG. 1, the operation transmission section 13 is
It has a tapered shape that expands in the backward direction.

As shown in FIG. 1, the actuation lever 2 has an operation receiving part 21 that slides on the operation transmission part 13 and converts the operating force into rotational force in an approximately 90 degree angle direction.

The operation receiving part 2 forms an acute angle with the part 21.
2, and a leaf spring section 23 extending from the operation transmission section 22.

As shown in FIG. 2, the first operating lever 2 is rotatably attached to the boss 43. In this case, since the two-actuating lever 2 is provided with the stepped portion 20, the stepped portion 20 and the claw portion 430 are engaged with each other.

This prevents the 1 actuation lever 2 from coming off.

Further, as shown in FIG. 1, the tip portions of the two leaf spring portions 23 are in sliding contact with the flange portion 42. The leaf spring section 23 transfers the amount of operation from the section 21 to the operation transmitting section 13.
bias in the direction.

The detection switch section 3 has a case 311 fixed to the side surface of the totalizer main body 6, as shown in FIGS. 2 and 5. The case 311 fixes the cap 310 with one touch.

Then, as shown in FIGS. 1 and 2, the nuclear case 31
In this case, the shaft portion 32 is fitted into the actuation receiver so that it can move forward and backward in a direction opposite to the actuation transmission portion 22 and can rotate about an axis. In the actuation receiver, the shaft portion 32 includes a plurality of shaft members 321,
Formed by combining 322 and 323.

The rotary bearing supports a gear 33 on the shaft member 322 of the ring portion 32 of the operating bearing. The gear 33 is the chain link bearing, and the 1-operation bearing is caused by the forward and backward movement of the shaft portion 32.

It is disposed at a position where it can mesh with the rotation transmission gear 50.

For internuclear transfer, gear 33 is the 5th Fj! As shown in J.

It appears to be missing teeth. In addition, as shown in FIGS. 1 and 2, the two-rotary receiver is normally positioned between the gear 33 and the camp 310 in the direction (axial direction) in which the gear 33 meshes with the rotation transmission gear 50. A biasing coil spring 36 is interposed.

The actuating receiver has a disk-shaped substrate 34 fixed to the shaft member 323 of the shaft portion 32. Although not shown in the drawings, the substrate 34 is fixed to the shaft member 323 of the shaft portion 32.
4 has a printed wiring pattern on its surface. And as shown in Figure 2.

One end of the torsion coil spring 35, which serves as rotation return means in the detection switch section 3, is fixed to the substrate 34.

Further, the tip portion 351 of the H-helix coil spring 35 is connected to the base plate 3.
4 to be electrically connected to the wiring pattern. The helical coil spring 35 itself is also made of a conductive material.

As shown in FIG. 2, the other end of the torsion coil spring 35 (left side in the figure) is attached to the bottom of the case 31, and its tip is pulled out of the case 31 and connected to the terminal 37. . The Fk terminal 37 is connected to a warning light (not shown).

On the other hand, as shown in the second WJ, a contact spring 38 is attached to the cap 310 of the case 31, and the contact spring 38
A contact portion 380 is formed at the tip of the contact portion 380 . The contact portion 38
0 is brought into sliding contact with the surface of the substrate 34. The wiring pattern provided on the substrate 340 is shaped so as to be electrically conductive with the contact portion 380. Further, the contact spring 38 is connected to the warning light via a lead wire (not shown).

The trip counter 63 is driven together with the total counter 61 by a worm mechanism or gear transmission by the rotating shaft of the speedometer. 6 in Figure 5
4 indicates a zero return operation knob of the trip counter 63;
Further, 62 is an output shaft provided to rotate in synchronization with a specific digit 610 of the total counter 61, and the rotation transmission gear 50 is pivotally supported at the tip of the cough output pongee 62.

Since this example is configured as described above, it exhibits first-order effects.

As shown in FIG. 5, when the totalizer main body 6 adds up, the one-rotation transmission gear 50 rotates in synchronization with a specific digit 610 of the total counter 61. As shown in FIG. As shown in FIG. 3, since the rotation transmitting gear 50 is normally engaged with the gear 33 through the urging of the coil spring 36,
The rotation of the rotation transmission gear 50 is transmitted to the shaft portion 32 via the rotary receiver and the gear 33. In this manner, when the shaft portion 32 of the actuating receiver rotates, the base plate 34 rotates together with the rotation of the shaft portion 32. At the same time, the torsion coil spring 35 is also rotated, causing torsion.

When the totalizer body 6 integrates a certain value, the wiring pattern on the substrate 34 and the contact portion 380 in the detection switch portion 3 become electrically connected.

As a result, a warning light lights up to notify the driver of a certain distance.

Here, in order to return the zero return mechanism 5 to zero, the operating rod portion 11 of the zero return operation knob 1 is pressed as shown in FIG. As a result, the operation transmission section 13 of the zero-return operation knob 1 and the operation amount control section 21 of the actuating lever 2 slide, and the operation amount of the operation transmission section 13 is transferred to the operation amount at an angle of about 90 degrees. 21
Convert to rotational force. In this case, in the 1 actuation lever 2, since the operation receiver part 21 and the operation transmission part 22 form an acute angle, the operation receiver is similar to the operation transmission part 21.
2 is also converted into the operating force of the operation transmitting section 13 and a rotational force in an approximately 90 degree angle direction.

The operation transmission section 22 rotated in this way is
As shown in the figure, the two actuating receivers press and move the shaft portion 32 toward the case 31. As a result, in the two-rotation bridge, the gear 33 and the rotation transmission gear 50 are disengaged. Also, at the same time,
The contact portion 380 is separated from the wiring pattern on the substrate 34.

In this manner, when both gears 33 and 50 are out of mesh, the shaft portion 32 of the first actuating receiver is rotatable. Therefore,
The torsion coil spring 35, which had been twisted by the rotation of the base plate 34, can now rotate nine times, and returns to its original state by the untwisting action.

Therefore, in the first working receiver, the shaft portion 32 returns to the zero point position.

Then, when you release your hand from the zero return operation knob 1, the zero return operation knob 1 is moved by the coil spring 14, the operating lever 2 is moved by the plate spring part 23, and the detection switch part 3 is moved by the coil spring 3.
6, each returns to its original state.

As described above, according to this example, the operating force of the zero return operation knob 1 can be converted into the rotational force of the operating lever 2 in the direction of an angle of about 90 degrees. This makes it possible to reduce the height of the zero return mechanism 5.

Furthermore, the plate spring portion 23 eliminates the need for a separate return spring, which reduces the number of parts by two.

Also, by meshing the one-rotation transmission gear 50 and the rotation receiver with the gear 33, the zero return mechanism 5 can be disposed outside the integrating needle main body 6.

Further, each component can be attached to the bracket 4° case 31 with one touch. This improves the ease of assembling the two.

Furthermore, the detection switch section 3 can detect the distance.

Therefore, according to the two examples, it is compact, has a small number of parts, can be assembled easily, and is equipped with switch detection.

A zero return mechanism for the distance detector 7 can be obtained.

Note that in these two examples, the contact spring 38 is abolished, and a display roll is used in place of the substrate 34.

Further, by providing an opening in the case 31 corresponding to the display roll portion, the detection method of the detection switch portion 3 can be changed. That is, the detection switch section 3 can be used as an indicator that changes the color of the roll depending on the distance, instead of detecting a switch as in the one-piece example.

[Brief explanation of drawings]

1 to 5 show a zero return mechanism of a distance detector as a totalizer according to an embodiment, FIG. 1 is a partially sectional side view of the distance detector, FIG. 2 is a similar partially sectional plan view, 3 and 4 are action explanatory diagrams, FIG. 5 is an overall plan view of the zero return mechanism attached to the totalizer body, FIGS. 6 and 7 show the prior art, and FIG. FIG. 7 is a side view of the zero-return type totalizer, and a cross-sectional view of the essential parts showing its zero-return mechanism. 13. 20. . 21. 22. 30. . 32. 33. 35. 41. . 56. . 50. 60. . 62,. 70. . Operation transmission section. The operating lever operation receiver is part. Actuation transmission part. Detection switch section. The operating bearing is a shaft part, and the rotating bearing is a gear. Torsion coil spring. bracket. Zero return mechanism. Rotation transmission gear. Totalizer body. Output wheel. distance detector.

Claims (1)

[Scope of Claims] A zero return operation knob that can move forward and backward and has a tapered operation transmission part that expands in the backward direction, and a zero return operation knob that slides on the operation transmission part of the zero return operation knob and transmits its operating force approximately 90 degrees. A rotatable actuation lever having an operation receiving part that converts into rotational force in an angular direction and an actuation transmitting part forming an acute angle with the operation receiving part, and a direction opposite to the actuation transmitting part of the actuating lever. an actuation receiving shaft that is arranged to be movable forward and backward and rotatable around an axis; a rotating receiving gear that is pivotally supported by the actuating receiving shaft; and a twisting mechanism that returns the rotated actuating receiving shaft to the zero point position. a detection switch section having a rotation return means such as a coil spring, and the rotation receiving gear is disposed so as to be able to mesh with a rotation transmission gear interlocked with the totalizer main body. mechanism.