JPH0219685Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a zero return device for a trip counter used in automobile mileage accumulators and the like.

[Conventional technology]

Conventionally, in this type of device, a return shaft for zero return operation was fitted and fixed to a knob for operating the return lever, and a spring holding shaft for holding the return spring on the outer periphery was fixed to this knob. Each of these shafts is inserted into the first and second through holes of the holder and held through washers (for example, Japanese Utility Model Publication No. 55-43497).

[Problem that the invention attempts to solve]

However, the above-mentioned conventional device requires a return shaft, a knob, a spring retaining shaft, and a washer, so there are problems in that the number of parts is large, the assembly is complicated, and the cost is high.

Therefore, the present invention has a small number of parts, easy assembly, and low cost.

[Means for solving problems]

Therefore, the present invention provides a zero return shaft for zero return operation, a knob for operating the zero return lever, and a spring holding shaft for holding the return spring on the outer periphery, on one side and the other side of the knob. With both shafts protruding with their axes shifted,
First and second through holes into which each shaft is inserted into a holder that is integrally molded with resin and holds each of the integrally molded shafts and knobs, and these first and second through holes. forming first and second grooves for communicating the side surfaces of the zero shaft with the outside with a width smaller than the diameters of the first and second through holes, and at least a portion of the zero return shaft.
A return for a trip counter, wherein the radial dimension in only a predetermined direction is narrower than the width of the first groove, and an elastic deformable portion that can be elastically deformed to a smaller diameter than the second groove is formed in the spring holding shaft. It provides a zero device.

[Operation] As a result, the zero return shaft is inserted into the first through hole of the holder from a predetermined direction that is narrower than the width of the first groove, and then the zero return shaft is rotated by a predetermined angle. The shaft is prevented from coming out of the first through hole. Furthermore, by elastically deforming the elastically deformable portion of the spring holding shaft to a diameter smaller than that of the second groove, the spring holding shaft is fitted and held in the second through hole, and rotation of both shafts relative to the holder is also prevented. be done. This allows the integrated zero shaft, knob, and spring retaining shaft to be easily and reliably held in the holder.

〔Example〕

The present invention will be described below with reference to embodiments shown in the drawings. In FIGS. 1 to 6, reference numeral 1 denotes a zero return shaft for zero return operation, which is formed protruding from approximately the middle part of one surface of a flat knob 2, and the end of this shaft 1 on the knob 2 side A pair of straight notches 3 are formed on both sides of the part. Reference numeral 4 denotes a spring holding shaft for holding the return spring 9 on the outer periphery, and it is formed protruding from one end side of the other surface of the knob 2 toward the side opposite to the return shaft 1, and has a bulge at its tip. A crack 5 is formed, and a crack for elastic deformation is formed in the axial direction including the bulge 5 up to the upper part adjacent to the bulge 5. An elastic deformation section 7 is formed around the periphery. Further, a U-shaped lever pressing portion 8 is formed on the other end side of the other surface of the knob 2 . Both shafts 1, 4, knob 2, and lever pressing portion 8 are integrally molded from resin.

Reference numeral 10 denotes a U-shaped holder, which is bent and formed integrally with the frame of the speedometer, and a lever fixing part 11 is integrally formed on the intermediate plate thereof to protrude, and a lever support hole 12 is formed in this lever fixing part 11. has been done. Further, the zero return shaft 1 is inserted into approximately the center of the upper plate portion of the holder 10.
A first through hole 13 having a diameter slightly larger than the diameter of the first through hole 13 is formed, and a cutout 3 of the zero return shaft 1 is formed which is smaller than the diameter of the first through hole 13 and the diameter of the zero return shaft 1. A first groove 14 is formed with a width larger than the width of the portion for communicating the side surface of the first through hole 13 with the outside. Furthermore, a spring holding shaft 4 is inserted into the tip side of the lower plate portion of the holder 10. A second through hole 15 having a diameter slightly larger than the diameter of this shaft 4 is formed, and the diameter of this second through hole 15 and the diameter when the elastically deformable portion 7 of the spring holding shaft 4 is not elastically deformed are formed. (B in Fig. 4a) and the diameter when the elastically deformable portion 7 of the spring holding shaft 1 is elastically deformed and becomes smaller (Fig. 4b)
(C) A second groove 16 is formed with a larger width for communicating the side surface of the second through hole 15 with the outside.

Furthermore, when both the shafts 1 and 4 are inserted into the through holes 13 and 15 of the holder 10, the return spring 9 is interposed between the lower plate part of the holder 10 and the knob 2. It is placed in the holder 10 in a state where it is pressed against the upper plate part of the holder 10 by a spring force. Reference numeral 17 denotes an intermediate lever for returning to zero, and its intermediate portion is swingably attached to the lever fixing portion 11 via a fulcrum pin 18 and a lever support hole 12. One end of this lever 17 is engaged with the lever pressing portion 8, and the other end of this lever 17 is opposed to a zero return lever 19 for driving the zero return mechanism of the trip counter.

20 is a speedometer dial, 21 is a speedometer pointer, 22 is a trip counter display window formed on the dial 20, and 23 is a total counter display window formed on the dial 20.

In the above configuration, as shown in FIG. 2, the portion of the return shaft 1 provided with the straight notch 3 is inserted into the first through hole 13 through the first groove 14 of the holder 10. Then, while rotating the spring holding shaft 4 by 90 degrees in the direction of the arrow in FIG.
0 into the second through hole 15 through the second groove 16. At this time, the elastically deformable portion 7 of the spring holding shaft 4 has a structure in which a crack 6 is provided as shown in FIG. 4 so that the diameter can be reduced to a size equal to or less than the dimension A of the second groove 16. When the elastically deformable portion 7 of the spring holding shaft 4 passes through the second groove 16 and is inserted into the second through hole 15, the elastically deformable portion 7 returns to the original dimension B due to its elastic force. It won't come off.

Also, by rotating the notch 3 of the zero return shaft 1 by 90 degrees, the shaft diameter becomes the same in the direction of exit from the first groove 14, so the return shaft 1
It is a structure that cannot be removed.

After assembling the return shaft 1 and the holder 10, the lever 17 is assembled to the holder 10 with one end thereof engaged with the lever pressing part 8, thereby more reliably preventing the return shaft 1 from rotating. It becomes possible.

After being assembled in this manner, by pressing the return shaft 1 in the direction of the arrow in FIG. In order to act as a lever, the lever 19 is pushed up and the trip counter returns to zero.

In addition, by arranging the zero shaft 1 with respect to the knob 2, as shown in FIG. It is possible to balance the load when

In the embodiment described above, the zero return lever 19 is driven by the lever pressing portion 8 of the knob 1 via the zero return intermediate lever 17.
The intermediate zero return lever 17 may be omitted, and the zero return lever 19 may be directly driven by the lever pressing portion 8.

Further, in the above-described embodiment, the knob 2 has a flat plate shape, but this shape is not limited to a flat plate shape, and may be other shapes such as a columnar shape.

Further, in the above-described embodiment, straight notches 3 are formed on both sides of the end of the zero return shaft 1, so that the radial dimension of a portion of the shaft 1 in a predetermined direction is made smaller than the width of the first groove 14. Although the notch 3 is narrow, the notch 3 may be provided only on one side, or may be provided over the entire shaft 1 in the axial direction.

[Effect of idea]

As mentioned above, in the present invention, a return shaft, a knob for operating the return lever,
Since the spring holding shaft that holds the return spring can be integrated, the number of parts can be reduced, and although the assembly of these parts into the holder is also integrated, it is extremely easy to assemble by rotation. It has the advantage of being easy and reliable, and can be done at low cost.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the device of the present invention;
FIG. 2 is an exploded perspective view of essential parts of the above embodiment, FIG. 3 is a side view of the above embodiment viewed from the direction of the arrow in FIG. 1,
4a and 4b are perspective views respectively showing the elastically deformed state and the elastically deformed state of the elastically deformed portion of the zero return shaft in the above embodiment;
Figure c is a perspective view showing the structure of the second through-hole portion of the knob in the above embodiment, Figure 5 is a perspective view showing the device shown in Figure 1 assembled into a speedometer;
FIG. 6 is a partially sectional front view of the main structure as seen from the direction of the arrow shown in FIG. DESCRIPTION OF SYMBOLS 1... Return shaft, 2... Knob, 3... Notch, 4... Spring holding shaft, 7... Elastic deformation part, 9... Return spring, 10... Holder, 13... First penetration Hole, 14...first groove,
15...Second through hole, 16...Second groove, 17
...Intermediate lever for return to zero, 19...Return to zero lever.

Claims (1)

[Scope of utility model registration request] A zero return shaft for zero return operation, a knob for operating the zero return lever, and a spring holding shaft for holding the return spring on the outer periphery are arranged so that their axes are shifted from one side of the knob to the other side. first and second through-holes into which the respective shafts are inserted into a holder which is integrally molded from resin with both shafts protruding and which hold the integrally molded shafts and the knob; , these first and second
a first for communicating the side surface of the through hole with the outside with a width smaller than the diameter of the first and second through holes;
and a radial dimension of at least a portion of the zero return shaft in a predetermined direction is narrower than the width of the first groove, and a diameter smaller than that of the second groove. A zero return device for a trip counter, wherein an elastically deformable portion that can be elastically deformed is formed on the spring holding shaft.