JP2998394B2 - Car speedometer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speedometer for a motor vehicle provided with an integrator for a traveling distance.

[0002]

2. Description of the Related Art A speedometer mounted on an automobile is provided with an integrator for integrating the traveling distance. As this integrator, a number wheel having a pulley shape, a large number of internal teeth provided on one surface, and one-tenth of the internal teeth provided on the other surface, is arranged in a row on one support shaft. In addition, a support plate supporting a pinion meshing with each of the internal teeth is arranged between each number wheel, the rotation of the speed cable is reduced, the rightmost number wheel is rotated, and the carry is sequentially carried to reduce the running distance. Internal tooth type integrators that perform integration are frequently used. In a so-called used car, the speedometer is removed from the front panel, a plate-like object is inserted between the number wheels of the integrator exposed on the side of the speedometer body, the gap between the number wheels is pushed out, and the pinion and the internal teeth are removed. Then, after the number wheel is reversed, the pinion and the internal teeth are re-engaged, and the integrated value is intentionally returned to deceive the running distance. For this reason, Japanese Utility Model Laid-Open No. 57-123558 proposes a device in which a transparent cylinder is placed over the entire integrator so that the numeral wheel cannot be rotated intentionally.

[0003]

However, since the integrator of the present invention covers the entire surface of the numeral ring group with a separate article called a transparent cylinder, a gap between the integrator and other components of the speedometer is provided. Must be taken large, which leads to an increase in physique, and also requires a design change of the speedometer itself. In addition, there is a problem that visibility deteriorates due to the reflection of the cylinder and the decrease in transparency over time. An object of the present invention is to provide an automobile equipped with an integrator that does not require a design change of an existing speedometer, hardly causes an increase in physique, can reliably prevent a change in an integrated value, and does not cause a decrease in visibility. In the provision of speedometers.

[0004]

SUMMARY OF THE INVENTION A speedometer for an automobile according to the present invention has a plurality of pulleys each having a body fixed to the back of a scale plate and having a predetermined number of internal teeth on both sides on the side of the body. A number wheel is arranged in a row on one support shaft, and an internal tooth type integrator having a support plate supporting a pinion meshing with the internal tooth is mounted between each number wheel, and provided on the display plate. in automotive speedometer of the type visually integrating meter from the window, the outer periphery of the support plate, wherein the cover portion that covers the outer periphery of the numeral wheel exposed from the body support pre
It is characterized by being provided integrally with the seat.

[0005]

According to the present invention, only the surface of the integrator exposed on the side of the body of the speedometer is covered with the cover. For this reason, it is difficult to insert a metal plate or the like between the numeral rings, and it is possible to prevent hands from directly touching the numeral rings. As a result, it is not necessary to change the design of the existing speedometer, the physical size is hardly increased, and the change of the integrated value can be reliably prevented. Also, the visibility of the integrated value does not decrease.

[0006]

1 shows an automobile speedometer 100 provided with an integrator according to the present invention. The speedometer 100 is a scale plate 1
The body 2 made of resin is fastened to the back of. The body 2 has a yoke ring 1 which is connected to a speedometer cable (not shown) at the center and includes an induction board.
1, a hair spring 12, a pointer shaft 14 for rotating a pointer 13 disposed on the surface of the scale plate 1, and the like are attached. In addition, an internal gear type integrator (total counter) 3 is mounted on the upper part of the body 2, and a trip counter (return-to-zero type integrator) 4 is mounted on the side facing away from the integrator.

As shown in FIGS. 2 and 3, the internal tooth type integrator 3 has a pulley shape on one shaft 31 and 0-9 shafts on the outer circumference.
Are rotatably supported and arranged in a row, and a disk-shaped support plate 6 is fixed to a shaft so as not to be rotatable between the respective number rings 5. Do it. The numeral wheel 5 has internal teeth 51 having 20 teeth on one surface and internal teeth 52 having 2 teeth on the other surface. The support plate 6 supports a pinion 61 that meshes with the internal teeth 51 and 52. With this configuration, the integrator 3 decelerates the rotation of the meter cable by a speed reduction mechanism (not shown), rotates the rightmost numeral wheel 5R, and sequentially carries up the running distance.

Each support plate 6 has an outer peripheral surface 5A (shown in FIG. 1; 1 / one of the outer periphery of the numeral ring) which extends from the body 2 of an adjacent numeral wheel 5 by extending a part of its outer peripheral edge in the axial direction. 3)) is provided by integral molding by injection molding. The cover portion 62 covers the gap between the numeral wheel 5 of the integrator 3 and the exposed surface of the numeral wheel 5, and a thin metal plate such as a flathead screwdriver is used to cover the numeral ring 50.
And prevents the hand from directly touching and turning the numeral wheel 5.

The cover portion 62 prevents the number wheel 5 of the integrator 3 from being forcibly turned, thereby preventing fraudulent acts of falsifying the running distance of a used car. Moreover, this integrator 3 is a speedometer 1
00 other components (body 2, hairspring 12
) May be the same as an existing speedometer, so that the speedometer 100 can be attached to the existing speedometer as it is, and the increase in the physique of the speedometer 100 is almost negligible. Further, the cover portion 62 can be easily formed integrally with the support plate 6 by injecting plastic or the like. In this case, the cover portion 62 can be assembled in the same process as before without increasing the number of parts. Further, since the cover portion 62 does not block the numeral display window 15 provided on the scale plate 1, the visibility of the integrator 3 is not hindered. When the exposed outer peripheral surface 5A is narrow, the cover portion 62 may be formed in a flat plate shape, or may be formed by attaching a separate member to the outer peripheral edge of the support plate 6 by bonding or the like.

FIG. 4 shows another embodiment. In this embodiment, the cover 63 is provided by extending the outer peripheral edge of the support plate 6 to both sides in the thickness direction. In this case, the gap between the numeral rings 5 can be reliably covered with the cover portion 63, and the length of the cover portion 63 can be shortened from the support plate 6, which is a support wall. There is an advantage that can be enlarged.

[Brief description of the drawings]

FIG. 1 is a right side view of an automobile speedometer according to the present invention.

FIG. 2 is a perspective view of an integrator incorporated in the speedometer of FIG.

FIG. 3 is an exploded perspective view of a main part of the integrator of FIG. 2;

FIG. 4 is an exploded perspective view of a main part of an integrator according to another embodiment.

[Explanation of symbols]

 Reference Signs List 100 Speedometer for automobile 1 Scale plate 2 Body of speedometer 3 Integrator 4 Trip counter 5 Numeral wheel 6 Support plate 31 Axis 62, 63 Cover part

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01C 22/00 G06M 1/02 G06M 3/12

Claims (1)

(57) [Claims] 1. A body is fixed to a back surface of a scale plate, and a plurality of pulley-shaped number wheels provided with a predetermined number of internal teeth on both sides are arranged on one support shaft on a side portion of the body. In addition, an internal tooth type integrator equipped with a support plate supporting a pinion that meshes with the internal teeth is mounted between each number wheel, and a type of an automobile speedometer for visually recognizing the integrator through a window provided on a display panel. The cover plate that covers the outer periphery of the numeral wheel exposed from the body on the outer periphery of the support plate.
An automobile speedometer, which is provided integrally with the speedometer.