JPS647405Y2 - - Google Patents

Description

[Detailed explanation of the idea] This proposal relates to a zero return device for a section distance meter.

There are two types of vehicle odometers: a total counter that displays the total distance traveled, and a trip counter that displays the section distance. It is integrated into the meter case together with the meter. A section distance meter has the same structure as a totalizer, except that the number of displayed digits is several digits less than a totalizer, and the driving method is also the same as that of a totalizer. The number of kilometers accumulated on the section distance meter is exactly the same as the totalizer, but by operating the knob, you can quickly return the accumulated number of kilometers to zero (return to zero) and add a new section distance. Equipped with a zero return device that can This zero return device has two types: one that returns to zero by pulling the knob, and one that returns to zero by pushing in the knob.
There are different formats.

By the way, the above-mentioned zero return device cannot accurately return to zero unless the knob is reliably pulled or pushed at the time of zero return, and the zero display of the numbering becomes irregular. In particular, in the case of a zero return device in which the knob is pushed in, the push of the knob tends to be insufficient during the zero return operation, and the numbering may not be reset reliably, and it is necessary to perform the zero return operation again, which is troublesome. There are some problems such as being overloaded.

This proposal was made in view of the above points, and the purpose is to ensure the zero return operation of the section odometer and to bring it back to zero accurately. The reset cam attached to the end of the rotary shaft supported by the frame is rotated by pressing the zero shaft in the visual direction of the pivotally supported numbering, and the reset lever pivotally supported by the rotary shaft is rotated. In a zeroing device for a section distance meter that resets the numbering display to zero by
A protrusion is formed on one of the facing surfaces of the reset cam and the frame, and the protrusion is recessed into the other surface, and the reset cam is rotated in the zero return direction along a rotation locus of the protrusion. Forming an arc-shaped hole or groove from the starting position to the mid-rotation position,
An elastic member is provided between the rotating shaft and the reset cam to press the reset cam against the frame, and at a position in the middle of the rotation of the reset cam in the zero direction, the rotational force of the reset cam is accumulated and the reset cam is returned to the zero position all at once. To provide a zero return device for a section distance meter that can be rotated up to 100 degrees and accurately returned to zero.

An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

1 to 4 show a section distance meter to which the zero return device according to the present invention is applied, and in FIGS. 2, a numbering 4 that is rotatably supported on the frame 2 and displays the distance, a zero return device 5 that is arranged on the frames 2 and 3 and returns the display of the numbering 4 to zero, and a reset cam 23 for the frame 2 and the zero return device 5. The power storage mechanism 6 is configured by a power storage mechanism 6. The frame 2 has a substantially U-shape, and an upper part 3c of a bracket 3 is fixed to a bottom surface 2c, and a driven gear forming a numbering 4 is mounted on a rotating shaft 10 supported between opposing end plates 2a and 2b. 11. The character wheels 12 to 15 are rotatably supported. Such numbering 4 is well known and its details will be omitted.

At a position below the numbering 4, a holder 20 is attached to a shaft 22 supported by both end plates 2a and 2b of the frame 2.
This holder 20 resets the display of each character wheel 12 to 15 to zero (return to zero).
reset levers 20a to 20d, and four pinion gears 21 (1 in Fig. 2) that mesh with adjacent character wheels of these character wheels 12 to 15 to carry up.
The arm 20e on which the arm 20e (only one piece is shown) is
It is formed integrally in the shape of a letter.

The shaft 22 is inserted into the shaft hole 23c of the reset cam 23 as shown in FIG.
The reset cam 23 is engaged with a notch 20f formed in the end of the holder 20, which is rotatably supported by the holder 20, and the holder 20 is rotated by the rotation of the reset cam 23.
A hole 23d having a step is formed in the reset cam 23 concentrically with the shaft hole 23c, and a coil spring 40 is interposed between the shaft end 22a of the shaft 22 and the bottom surface of the hole 23d. The surface 23e of the reset cam 23 is brought into pressure contact with the surface 2e.

A substantially hemispherical projection 23f is formed at a predetermined position on the surface 23e of the reset cam 23. On the other hand, a reset cam 23 is provided on the end plate 2b.
An arcuate hole 2f is formed on the trajectory of the protrusion 23f as the reset cam 23 rotates, and extends from the zero return starting rotation position to a predetermined position during the rotation of the reset cam 23. The projection 23f of the reset cam 23 is recessed into the arc-shaped hole 2f so as to be movable in the circumferential direction. These projections 23f of the reset cam 23,
The spring 40, the arcuate hole 2f of the end plate 2b, the end 22a of the shaft 22, and the like constitute a force storage mechanism 6 for the zero return rotation direction of the reset cam 23.

The return spring 24 is interposed between the end plate 2b and the reset cam 23, surrounds the shaft of the reset cam 23, and has one end inserted into a hole (both not shown) formed in the end plate 2b, and the other end inserted into a hole (both not shown) formed in the end plate 2b. The portion 24a is fitted and locked into a hole 23g formed in the reset cam 23. This spring 24 is the reset cam 23
This is for applying a rotational force in the counterclockwise direction in FIG.

As shown in FIG. 2, the bracket 3 has a substantially U-shape when viewed from the side, and opposing end plates 3a and 3b are arranged in alignment in the viewing direction of the numbering 4, and one end of the upper part 3c is connected to the other end by a pin 26. The lever 25 is fixed to the bottom surface 2c of the frame 2 by a pin 27 (FIG. 1). The zero return knob cam 30 (FIG. 2) is disposed between the end plates 3a and 3b of the bracket 3 so as to be movable in the viewing direction, and both ends are inserted into the hole 30c bored in the upper part of the knob cam 30 (FIG. 2). ,3b
A guide shaft 31 fixed to the knob cam 30 is inserted through the guide shaft 31, and the knob cam 30 slides along the shaft 31 in the direction in which the numbering 4 is viewed.

End plates 3a, 3b of bracket 3 and knob cam 3
Holes 3b, 3e, and 30b are aligned and drilled in the lower part of 0, and bearings 32, 33 are installed in the holes 3d, 3e. A trip knob shaft (hereinafter referred to as a return shaft) 34 slidably passes through the bearing 32, the hole 30b, and the bearing 33, and the end plate 3b of the hole 30b.
The opening end on the side abuts a washer 35 that is fitted and fixed to the approximate center of the shaft 34, and a return spring 36 is interposed between the opening end of the hole 30b on the end plate 3b side and the end plate 3b. . As a result, the knob cam 30 is integrally engaged with the shaft 34 by the washer 35 and the spring 36.

As shown in FIG. 3, the lever 25 has a substantially crank shape, and its central portion is rotatably supported on the bottom surface 2c of the frame 2 by the pin 27 as described above, and its one end 25a is connected to the upper end of the knob cam 30. 30a (FIG. 2), the other end 25b is in contact with the cam portion 23b of the reset cam 23. And holder 2
0, a reset cam 23, a return spring 24, a knob cam 30, a return shaft 34, a return spring 36, and the like constitute a zero return device 5 that returns the display of the numbering 20 to zero.

In this configuration, when the return shaft 34 is not pressed, the knob cam 30 is pressed against the end plate 3a of the bracket 3 by the return spring 36, and the reset cam 23 is pressed by the return spring 24, as shown in FIGS. It is returned to the rotating position shown in Fig. 2, and each character wheel 12~ of numbering 4 is
15 is engaged by each pinion gear 21, and each reset lever 20a-20d is spaced apart from a zero return cam 12a-15a (FIG. 1) formed at a predetermined position at one end of the bearing of each character wheel 12-15. There is. Thus, the character wheel 12 rotates together with the driven gear 11.
As the character wheel 1 rotates, the character wheel 1 passes through the pinion gear 21.
3 to 15 are carried up in sequence to display the mileage.

In order to return the display of numbering 4 to zero, the return shaft 34 is moved to the second position against the return spring 36.
When pressed in the direction of arrow A in FIGS. 3 and 3, the knob cam 30 slides together with the shaft 34, and
5 is rotated in the direction of arrow B in FIG. 3, and the reset cam 23, which engages with the lever 25, is rotated in the direction of arrow C in FIG. 2 through the return spring 24. As the reset cam 23 rotates, the holder 2
0 rotates, and each pinion gear 21 is separated from each character wheel 21 to 15 of numbering 4, while the tip of each reset lever 20a to 20d engages with a cam 12a to 15a for resetting each character wheel 23 to 26. start matching.

The projection 23f of the reset cam 23 moves inside the hole 2f from the rotation start position in the return direction shown in FIG. 5 to the end 2f' of the arc-shaped hole 2f as shown in FIG. The reset cam 23 moves without any resistance, so the reset cam 23 rotates in response to the pressing force of the shaft 34. When the projection 23f of the reset cam 23 comes into contact with the end 23f' of the hole 2f during rotation, the reset cam 23 is locked by the end 23f', and a rotational force is applied by the pressing operation of the shaft 34. Rotational force is accumulated when the reset cam 23 is locked. This accumulated force, that is, the stored force, presses the reset cam 23 against the end plate 2b of the spring 4.
When the pressing force of 0 is exceeded, the projection 23f of the reset cam 23 rides on the surface of the end plate 2b from the end 2f' of the hole 2f, and the reset cam 23 returns to the zero position shown by the projection 23f' in FIG. Rotate all at once in the direction of arrow C.

When the reset cam 23 rotates to the zero position shown in FIG.
(Fig. 1), each of these character wheels 12
-15 are all reset to zero, and numbering 4 is returned to zero.

Zero shaft 34 after zeroing numbering 4
When the pressing force is released, the knob cam 30 is pressed back to the position shown in FIG. 2 by the return spring 36.
As a result, the reset cam 23 returns to the spring 2.
The lever 25 is rotated counterclockwise to the stop position shown in FIG. 2 while being rotated by the spring force of 4.
During this return operation, the reset levers 20a to 20d of the holder 20 move the cams 12 of the character wheels 12 to 15.
a to 15a and each pinion gear 2
1 engages each of the character wheels 12 to 15, and the zero return operation is completed.

In this embodiment, a case has been described in which the protrusion 23f is formed on the reset cam 23 side and the arcuate groove is formed on the end plate 2b of the frame 2. However, the present invention is not limited to this. It goes without saying that a protrusion may be formed on the side and an arc-shaped hole may be formed on the reset cam 23 side.

Further, it goes without saying that an arcuate groove may be formed instead of the arcuate hole.

As explained above, according to the present invention, the reset cam attached to the end of the rotating shaft that is pivotally supported on the frame is rotated by pressing the reset shaft in the visual direction of the numbering that is pivotally supported on the frame. In a zeroing device for a section distance meter that resets the display of the numbering to zero by rotating a reset lever pivotally supported on the rotating shaft, a protrusion is formed on one surface of the facing surface of the reset cam and the frame. and an arc-shaped hole or groove is formed in the other surface into which the protrusion is recessed and which extends from a rotation start position in the zero direction of the reset cam to a rotation midway position along the rotation locus of the protrusion. An elastic member is provided between the rotating shaft and the reset cam to press the reset cam against the frame, and at a position in the middle of rotation of the reset cam in the return direction, the protrusion of the reset cam is removed from the hole or groove on the frame surface. When the vehicle runs over the vehicle, the rotational force of the reset cam is accumulated, and the accumulated power is used to rotate the reset cam to the zero position at once, so the zero return operation can be performed reliably and the numbering can be displayed accurately. Moreover, it can be easily returned to zero.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of a section distance meter to which the zero return device according to the present invention is applied, Fig. 2 is a partially cutaway side view of Fig. 1, and Fig. 3 is a bottom view of Fig. 1. Figure 4 is a sectional view of the main part of Figure 1 that constitutes the force storage mechanism, Figure 5 is an explanatory diagram showing the relationship between the protrusion of the reset cam in Figure 4 and the engagement hole, and Figure 6 is the same as Figure 4. FIG. 2 is a schematic explanatory diagram of the operation of the power storage mechanism shown in FIG. 1...Section distance meter, 2...Frame, 2f...
Arc-shaped hole, 3... Bracket, 4... Numbering, 5... Zero return device, 6... Force storage mechanism, 12-1
5...Character wheel, 23...Reset cam, 23f...
...Protrusion, 24...Return spring, 25...Lever, 30...Knob cam, 34...Return shaft, 40...Spring.

Claims (1)

[Scope of utility model registration request] Press the zero shaft in the visual direction of the numbering that is pivotally supported on the frame to rotate the reset cam attached to the end of the rotating shaft that is pivotally supported on the frame, and then move the reset lever that is pivotally supported on the former rotating shaft. In a zeroing device for a section rangefinder that is rotated to return the display of the numbering to zero, a protrusion is formed on one face of the opposing face of the reset cam and the frame, and the protrusion is recessed into the other face. Further, an arc-shaped hole or groove is formed along the rotation locus of the protrusion from a rotation start position in the return direction of the reset cam to a mid-rotation position, and a circular arc-shaped hole or groove is formed between the rotation shaft and the reset cam. A zero return device for a section distance meter, characterized in that an elastic member is provided on the frame to press the reset cam.