JPH0363785A - Counter - Google Patents

Abstract

PURPOSE:To prevent leaked light from the gap between display wheels to improve the visual readability by supporting one light shielding cover on at least one supporting shaft and connecting a curved cover part, with which the gap between display wheels is covered, to this light shielding cover as one body. CONSTITUTION:One light shielding cover 5 is supported on at least one of supporting shafts 3 and 3A, and a curved cover part 5A which is placed at least between display wheels 4 corresponding to display windows and covers the gap between display wheels 4 is connected to the light shielding cover 5 as one body. Thus, the gap between display wheels 4 is covered with the light shielding cover 5 to not only intercept the illumination light but also conceal teeth of display wheels 4 from view, and the satisfactory visual readability is obtained though the direction of user's eyes is oblique to the display part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to an outer binion type counter used in a travel distance meter, hour meter counter, etc. of an automobile.

[Prior Art] Generally, this type of outer pinion type counter has two support shafts arranged in parallel between the left and right side plates of the frame, and a plurality of display wheels mounted on one support shaft at predetermined intervals. A pinion for shifting is provided on the other support shaft between the display wheels, and long teeth and short teeth are formed alternately on this pinion, and the long teeth and short teeth are arranged in the upper position. The long teeth mesh with continuous teeth formed on the entire lower folded periphery of the digit side display wheel, and the long teeth mesh with intermittent teeth formed at, for example, one location on the upper 0 digit side periphery of the lower digit display wheel. . Then, when the rotational force is appropriately transmitted to the lowest display wheel by the rotation transmission means, each display wheel is sequentially shifted and rotated from the lower digit side to the higher digit side via the shift pinion. It has become. In this case, a step is formed on the periphery of the display wheel on the upper digit side, excluding the intermittent tooth portion, and two adjacent long teeth of the pinion come into contact with the circumferential surface of the step when the display shaft rotates. The contact prevents the pinion from rotating, and the display axis between the lower digits is 1.
When the intermittent teeth of this rotating display shaft reach the pinion position,
The pinion is rotated by a predetermined angle by the engagement of the intermittent teeth and the long teeth, and the display wheel between the upper digits is rotated.

By the way, as counters for boat fishing, there are the above-mentioned outer pinion type counter and inner pinion type counter.

In an inner pinion type counter, a pinion gear for carry is interposed in the inner recess of the inner peripheral surface of the display wheel, and the carry is operated from the lower digit display axis to the higher digit display axis in sequence. Because of this structure, when the pinion gear meshes with the continuous or intermittent teeth provided on the display wheel, the backlash between each gear is relatively small as a deviation in the displayed value (numerical value) on the outer circumferential surface of the display shaft. Because of the magnification, when viewed from the position of the display window provided for reading the display values, a phenomenon in which the display values provided on each display axis are likely to be uneven may easily appear.

In this regard, in the case of an outer pinion type counter, since a pinion gear is engaged between the outer peripheral surface position of each display wheel, the gears provided on the display wheel and the pinion gear, such as continuous teeth or intermittent teeth, mesh with each other. Even if there is a crash, the pinion gear and the gear provided on the display wheel are engaged at the meshing position, that is, the position on the outer circumference of the display shaft, so the displayed value on the outer circumference of the display wheel will be misaligned. Even if it is maximum, it is only the amount of backlash between each gear, and as a result, when reading the displayed value from the display window of a counter installed on the front side of the display wheel, for example, the display window is The advantage is that you don't have to worry about it coming off the window frame.

However, in this type of outer pinion type counter, a pinion for shifting is provided outside between each display wheel, and the teeth of this pinion are meshed with the teeth of two adjacent display wheels, so each display A gap of a predetermined width is inevitably created between the rings and the teeth of each adjacent display ring, and therefore, the first continuous tooth part or the intermittent tooth of the display shaft is separated from the gap between each display ring. There are problems in that the illumination light from the light source provided below the display wheel passes through the gap and leaks, and the visibility of the displayed values is poor.

In order to solve this problem, in conventional counters of this kind, as disclosed in Japanese Utility Model Application Publication No. 62-25813, etc., a display window formed on the display board is located between the display wheels. A crosspiece is provided, and the crosspiece hides the gap between the display rings and blocks the illumination light from the light source.

[Problems to be Solved by the Invention] In the above-mentioned conventional technology, since the display window of the display board is provided with a crosspiece corresponding to the display ring, a gap is created between the crosspiece and the display section. However, when the viewing direction is perpendicular to the display, this problem does not occur much, but when the display is viewed from an angle, the illumination rays leaking from between the display rings and the gaps between the display rings become visible, impairing visibility. There was a problem with it being bad.

Therefore, an object of the present invention is to provide a counter that can prevent light leakage from the gap between display axes.

[Means for Solving the Problems] The present invention provides a display wheel that is provided with a plurality of display wheels rotatably provided at predetermined intervals on a support shaft installed horizontally on a frame, and that a plurality of display wheels are installed horizontally on the frame parallel to the support shaft. In a counter in which a pinion for digit feeding is provided between each display wheel on a support shaft, and the displayed value of the display wheel is visually read through a display window of a display board, one light-shielding cover is provided on at least one of the support shafts. A curved cover portion is integrally connected to the light-shielding cover and is located between at least each display ring corresponding to the display window and covers the gap between the display wheels.

[Function] With the above configuration, the light-shielding cover covers the gap between the display axes, shields the illumination light beam, and hides the teeth of the display wheel. As a result, good visibility can be obtained even if the viewing direction is oblique to the display section.

[Example] Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

1 to 4 show a first embodiment of the present invention, and as shown in the figures, two support shafts 3,
3A are installed horizontally in parallel, and one of the support shafts 3 supports a plurality of display wheels 4 on which numbers "0 to 9" are displayed so as to be rotatable at predetermined intervals, and the support shafts 3 and 3A is provided with one light-shielding cover 5 between each display ring 4, in which a plurality of curved cover portions 5A are integrally arranged to cover the gaps between each display shaft 4, and the other support shaft 3A is located between each display shaft 4. A pinion 6 for shifting is provided.

The display wheel 4 has continuous teeth 7 formed on the entire periphery of the lower digit 1PIryA surface, and the upper digit 111! Two intermittent teeth 8 are formed on the IIP 1 surface, and a stepped portion 9 is formed on the periphery of the display shaft 4 excluding the intermittent teeth 8, and the tip of the continuous tooth 7 is at the same height as the stepped portion 9. It is formed one step lower than the peripheral surface of display Va4. Further, a boss portion 10 is formed in the center of the display wheel 4,
This boss portion 10 maintains a predetermined distance between each display wheel 4. Further, a drive gear 11 is integrally connected to the lower digit side of the display wheel 4 of the lowest digit.

The pinion 6 has long teeth 12 and short teeth 13 formed alternately, and has a hollow boss portion 1 extending laterally, that is, in the ll1l line direction of the support shaft 3A.
4 are integrally formed, and the intervals between the respective binions 6 are maintained. In the gap between two adjacent display wheels 4, the long teeth 112 and short teeth 13 mesh with the continuous teeth 7 of the upper digit side display ring 4, and the long teeth 12 mesh with the intermittent teeth 8 of the lower digit side display wheel 4. It is formed to do so. When the indicator wheel 4 rotates, the pinion 6 is prevented from rotating by two adjacent long teeth 12 coming into contact with the circumferential surface of the stepped portion 9 as shown in FIG. When the intermittent tooth 8 reaches the pinion-off 6 position, the tooth portion of the pinion 6 rotates by a predetermined angle by two teeth due to the meshing of the intermittent tooth 8 and the length @ 12, and the display shaft 4 on the upper digit side is rotated to shift. It has become.

The light-shielding cover 5 is made of, for example, an opaque synthetic resin material to be able to block light, and has an open-face plate 15 located on the upper digit side of the display ring 4 of the highest digit and inserted through the support shaft 3° 3A. A cylindrical pinion cover part 16 that covers the pinion 6 groups is integrally provided on the surface measurement plate 15 along the axial direction of the support shaft 3A, and the plurality of pinion cover parts 16 are provided on both circumferential edges of the pinion cover part 16. The curved cover portions 5A are integrally arranged in series, and furthermore, a disk-shaped holding plate 17 located between each display ring 4 is integrally connected with each corresponding curved cover portion 5A in parallel with the open surface plate 15. Each retaining plate 17° side plate 1
A shaft hole 18 through which the support shaft 3 is inserted is formed in each of the shaft holes 5,
The side plate 15 is formed with a shaft hole 18A through which the support shaft 3A is inserted. In this case, the curved cover part 5A has a T-shaped flange shape as shown in FIG. The outer peripheral surface of the display wheel 4 and the curved cover portion 5A are formed flush with each other. Also, the pinion 6 of the holding plate 17 ff! A notch 19 for arranging the pinion 6 is formed at the end of the IJ, and the inside of the pinion cover 16 is formed in a hollow shape. Further, the holding plate 17 is formed so as to be located approximately at the center with respect to the width dimension of the long teeth 12 and short teeth 13, which are the tooth portions of the pinion 6.

When assembling, first insert one end of the support shaft 3°3A into the shaft hole 18.18A of the side plate 15 of the light-shielding cover 5, and then insert the fU & display ring 4 of the upper digit in the direction perpendicular to the axial direction as shown by the arrow. The pinion cover part 1 is inserted between the surface measuring plate 15 and the holding plate 17, and the support shaft 3 is inserted into the shaft hole 18. Then, the pinion 6 of the highest digit is inserted into the support shaft 3A.
6, and in this way the pinion 6 and the display wheel 4
The support shaft 3.3A is inserted through the light-shielding cover 5 while sequentially assembling the light-shielding cover 5 from the upper digit side to the lower digit side. Further, in this embodiment, the light-shielding cover 5 is supported in a non-rotating manner by supporting and fixing a pair of support shafts 3.degree. 3A to the left and right side plates 2 of the frame 1.

In the above embodiment, the curved cover portion 5A of the light-shielding cover 5 integrally formed between each display ring 4 is provided, and the curved cover portion 5A of the light-shielding cover 5 allows the display ring 4 to
The curved cover portion 5A is disposed between the display wheels 4 when the numbers on the display wheels 4 are visually read from the display window 21 of the display board 20. Therefore, the continuous tooth 7° stepped portion 91 and the intermittent tooth 8 are not visible unlike in the conventional case, and visibility is improved. In addition, since the illumination light from a light source (not shown) is blocked by the light-shielding cover 5 and does not pass through the gaps between the display wheels 4, even if the line of sight is oblique to the numerals, it can be seen from between the display wheels 4 as in the conventional case. Good visibility can be obtained without light leakage. In addition, since the light-shielding cover 5 is integrally formed with the holding plate 17 having the shaft hole 18, the curved cover portion 5A, and the pinion cover portion 16, the light-shielding cover 5 is assembled to the support shaft 3° 3A as a single member. The gap between the indicator wheels 4 and the pinion 6 can be covered with just a single touch, making it easy to assemble. It is also possible to prevent the problem of the counter display value being subtracted.

5 and 6 show a second embodiment of the invention, and a first embodiment of the invention.
The same reference numerals are given to the same parts as in the embodiment, and explanations of the same parts are omitted. In this embodiment, the retaining plate 17 in the first embodiment is removed, and in this embodiment, the light shielding cover 22 is entirely It has a surface measuring plate 15 which is formed in a substantially cylindrical shape and is located on the upper digit side of the display wheel 4 of the highest digit and into which the support shaft 3°3A is inserted. The cover portion 5A is integrally formed to extend into a substantially cylindrical shape, and the curved cover portion 5A is formed by a curved connecting piece excluding the window portion 15B formed by cutting out the display portion of each display wheel 4. ing. Therefore, when assembling, it is only necessary to assemble the light shielding cover 22 to the support shafts 3, 3A, and to assemble the binion 6 and the indicator ring 4 to the support shafts 3, 3A in order from the axial direction as usual. The illumination light leaking from the gap between the display wheels 4 due to the light-shielding cover 22 is caused by the curved cover portion 5A of the light-shielding cover 22.
The light shielding cover 22, which is formed in a hollow cylinder shape, can prevent light from being operated from the outside, and can prevent the displayed value from being intentionally subtracted.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the gist of the present invention.1 For example, the light-shielding cover includes a plurality of light-shielding covers that cover at least between the display rings corresponding to the display windows. As shown in FIG. 7, the light-shielding cover 23 is integrally formed with a boss part 24 on a substantially disc-shaped side plate 15A, and the cover part 24 is attached to the surface plate 15A in the axial direction. An extending connecting portion 25 is integrally formed, a plurality of curved cover portions 26 covering between the display wheels 4 are integrally formed on the connecting portion 25, and the light-shielding cover 23 is provided with a lock for fixing the cover to prevent rotation. A mating recess 27 may be formed, and this mating recess 27 may be engaged with a shaft fixed to the frame 1 or a part of the frame 1. Even in this case, - light shielding covers 23 can prevent light from between the display wheels. Can prevent light leakage. Further, the curved cover portion does not need to be flush with the display wheel, and may be located outside the display surface.

In addition, as shown in FIG.
may be formed to have a long semicircular arc shape corresponding to the display window opening.

[Effects of the Invention] The present invention provides a plurality of display wheels on a support shaft horizontally installed on a frame so as to be freely rotatable at predetermined interval @, and A counter is provided with a shift binion located between each display wheel, and the display value of the display wheel is visually read through a display window of a display board, in which a light-shielding cover is supported on at least one of the support shafts; This light-shielding cover is integrally connected with a curved cover part that is located at least at each display VarWJ corresponding to the display window and covers the gap between the display rings, thereby preventing light leakage from the gap between the display rings. We can provide counters that can

[Brief explanation of drawings]

1 to 4 show a first embodiment of the present invention, in which FIG. 1 is a partially cutaway plan view, FIG. 2 is an exploded perspective view, FIG. 3 is a cross-sectional plan view, and FIG. 4 is a longitudinal ! Ir(P1 side view, Figures 5 and 6 are the second embodiment of the present invention, Figure 5 is a perspective view,
FIG. 6 is a sectional view, and FIGS. 7 and 8 are perspective views showing other embodiments of the present invention. 1... Frame 3.3A... Support shaft 5, 22.23.28... Light shielding cover 5A, 15
A, 26.29...Curved cover portion 6...Binion 20...Display plate 21...Display window

Claims (1)

[Claims] (1) A plurality of display wheels are rotatably provided at predetermined intervals on a support shaft installed horizontally on the frame, and positions are placed between each display ring on the support shaft installed horizontally in parallel with the support shaft on the frame. In the counter, a pinion for digit feeding is provided, and a value displayed on the display wheel is visually read through a display window of a display board. A counter characterized in that a curved cover portion is integrally provided and is located between each display ring corresponding to a display window and covers a gap between the display wheels.