JP3417535B2 - Indicating instrument - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to indicating instruments.

[0002]

2. Description of the Related Art Various vehicles such as automobiles are equipped with measuring instruments for displaying measured values such as running speed and engine speed. Of course, in particular, the instruments installed in passenger cars accurately display to the driver the information that is essential for vehicle driving, such as the above-mentioned running speed and engine speed, and the information content displayed by the instrument can be sensed by the driver. It is necessary to devise to improve the visibility so that it can be easily and accurately distinguished even in an instant. In addition, particularly in the dial, it is possible to realize the ease of viewing and the degree of fatigue given to the driver by combining the visual comfort expressed by the shape and design of the dial with the visibility. Therefore, various improvements and improvements of such characteristics have been proposed. Among them, indicator meters, so-called analog meters, are relatively inferior to digital meters in terms of instantaneous visibility of indicators such as graduations, but indicators that display engine speed etc. in which the numerical fluctuations of the indicators are relatively severe. When used as an instrument, it has been generally mounted as an instrument suitable for an automobile because of the characteristic that it is possible to display numerical values that naturally correspond to human senses.

The characteristics such as the above-mentioned visibility, comfort of appearance, eye-friendly and less tiredness of the indicating instrument mounted on such an automobile are mainly influenced by the structure of the dial. Many. Therefore, various improvements have been attempted with attention paid to such a point. As one of them, in order to further improve the ease of visibility realized by the combination of the above-mentioned comfort and visibility in the indicating instrument and the reduction of fatigue to the driver, the dial of the dial is A technique is conceivable in which the ground color (background) of the dial on which the indexes and the like are arranged is not a single tone but a gradation of color and shade.

[0004]

However, when such a gradation is arranged on the dial of an in-vehicle instrument such as a speedometer of a passenger car, only a small amount of the gradation can be visually recognized. However, there is a problem in that even if the above is provided, practically few visual effects can be obtained.

That is, the dial plate is generally formed in a substantially disc shape with the rotation axis of the pointer as its center, and is proportional to the distance from the center from the central portion toward the outer peripheral portion (that is, the outer side). Even though the gradation dots are arranged (linearly) in such a density distribution that the density (the number of dots per unit area) is gradually reduced, it is clearly recognized as gradation when observed by the observer. There was a problem that it was difficult.

Alternatively, in order to form the gradation described above, a dial plate is formed using a translucent or transparent light transmissive material instead of the dots as described above, and the light of the light transmissive dial plate is used. Even when the transmittance is gradually changed from the center toward the outer peripheral portion in the above manner, or when the color density of the dial surface is changed in the above manner, when the observer visually observes it. However, there is a problem that it is difficult to clearly recognize the gradation.

The present invention has been made to solve such a problem, and a gradation which is clearly recognized as a change in color or shade is provided on the dial so as to be comfortable in appearance and visibility. The challenge is to realize an improved indicating instrument.

[0008]

The indicating instrument of the present invention is, firstly, at least one of a pointer, which is rotatable about a rotary shaft, and a scale, a number, and a character, which are indicators corresponding to the pointer. In a indicating instrument having a dial plate on which is arranged a gradation distributed such that the visual density decreases outward with respect to the rotation axis of the pointer, and the visual density of the entire gradation is reduced. The position where the intermediate value is present is outside the intermediate position between the center position and the position where the index is arranged, and the gradation is distributed so that the change in the visual density is most conspicuous on the outside. It is characterized by having a dial.

That is, according to the technique of the present invention, the positional change in the visual density of appearance is made clearer and smoother than the change in the physical quantity such as the brightness and the area ratio of the gradation. In other words, the position where the change rate of the visual density is the maximum is located at the part where the gradation change is most visible on the dial, that is, the middle position of the dial which is most conspicuous or the area outside it. Then, the density distribution is changed to form a gradation. This allows
It is possible to realize a gradation that is clearly and smoothly viewed.

Secondly, the indicator instrument of the present invention is provided with a pointer which can be rotated about a rotation axis and at least one of a scale, a number and a character as an index corresponding to the pointer. In the indicating instrument having a dial, the gradation dots are distributed such that the distribution density decreases toward the outside with the rotation axis of the pointer as a center, and the distribution density is the distribution density of the entire gradation dots. A dial plate provided with gradation dots distributed such that a position having an intermediate value is outside the intermediate position between the center position and the position where the index is arranged. I am trying.

That is, by forming a gradation with a large number of fine dots and arranging a portion having a dot density in the middle of the gradation from the center to the outer side of the center of the dial, the visibility of the gradation is improved. By increasing the dot density in the area for substantially displaying the dial outside the center, which is the highest position (that is, the portion in which the tip of the pointer moves to indicate an index such as a scale), higher than before, Compared with the conventional gradation that changes the density or density linearly (linearly) in proportion to the distance from the center, the gradation as a whole has improved visibility and is visually recognized as a gradation that changes more clearly. It is possible to

Thirdly, the indicating instrument of the present invention is a gradation dot distributed in the above-mentioned second indicating instrument so that the distribution density is reduced toward the outside with the rotation axis of the pointer as the center. The position where the distribution density is an intermediate value of the distribution density of the entire gradation dot is outside the intermediate position between the center position and the position where the index is arranged, and the intermediate value. It is characterized in that it is equipped with a dial plate on which gradation dots are arranged so that the distribution density outside the position where the above-mentioned position changes is a downward convex convex non-linear change rate.

That is, by forming a gradation with a large number of fine dots and arranging a portion having a dot density in the middle of the gradation from the middle to the outside of the center and the outer peripheral portion of the dial, the visibility of the gradation can be improved. The dot density in the area that substantially displays the dial outside the center, which is the highest position (that is, the portion in which the tip of the pointer moves to indicate an index such as a scale) is higher than before, and before and after that. Since the change in the dot distribution density of the area is smoothly distributed according to the human visual perception characteristics, the visibility is improved as a whole gradation compared to the conventional gradation, and the most conspicuous part, that is, the part from the middle to the outer part. Thus, it is possible to be visually recognized as a gradation that changes smoothly and clearly.

Fourthly, in the above-mentioned indicating instrument,
The gradation dots are distributed so that the distribution density decreases toward the outside around the rotation axis of the pointer, and the position where the distribution density is an intermediate value of the distribution density of the entire gradation dot is at the center. Located outside the intermediate position between the position and the position where the index is disposed,
And the distribution density outside the position of the intermediate value changes at a downward convex non-linear rate of change, while the distribution density inside the position of the intermediate value becomes a nonlinear convex upward. It is characterized in that it is provided with a dial plate on which gradation dots distributed so as to change at a changing rate are arranged.

That is, in addition to the indicating instrument described in the third section, the gradation dot distribution density inside the position of the intermediate value is distributed so as to change with a convex non-linear change rate. By providing the dial plate, the fourth indicating instrument can be visually recognized as a gradation in which the fourth indicating instrument is more smoothly and clearly changed.

In the fourth indicator, the dot density in the region from the middle position of the dial, which is the position where the gradation is most visible, to the outside is made higher than before, and the dot distribution density before and after that is increased. The change of is smoothly distributed according to the human visual cognitive characteristics, but this is not the only means to make the gradation more clearly visible, and it is not limited to this in the region from the intermediate position to the outside. The same effect as described above can be obtained by disposing the gradation dots so that the rate of change in dot density is maximized.

Fifthly, the indicating instrument of the present invention is provided with a pointer that can be rotated about a rotation axis and at least one of a scale, a number, and a character as an index corresponding to the pointer. In the indicating instrument having a dial plate, the gradation dots are distributed so that the distribution density decreases toward the outside around the rotation axis of the pointer, and the position where the rate of change of the distribution density is maximum is It is characterized in that it is provided with a dial plate on which gradation dots distributed so as to be located outside an intermediate position between the center position and the position where the index is arranged are provided.

Sixthly, in the fifth feature, the gradation dots are distributed such that the distribution density decreases outward with respect to the rotation axis of the pointer, and the change rate of the distribution density is maximum. The distribution density outside the intermediate position between the center position and the position where the index is arranged, and the distribution density outside the position where the rate of change is maximum is a non-linear It is characterized in that it is provided with a dial plate on which gradation dots distributed so as to change at a changing rate are arranged.

As a result, the visibility of the entire gradation is improved as compared with the conventional gradation, and the most conspicuous portion, that is, the portion from the middle to the outer side, is
The gradation can be visually recognized as a smooth and clear change.

In a seventh aspect of the present invention, in the fifth aspect, the gradation dots are distributed such that the distribution density decreases outward with respect to the rotation axis of the pointer, and the distribution density changes. The position where the rate is maximum is outside the intermediate position between the center position and the position where the index is arranged, and the distribution density outside the position where the rate of change is maximum is convex downward. While changing with a non-linear rate of change of, the distribution density inside the position where the rate of change becomes maximum changes so as to change with a non-linear rate of change in a convex shape. The feature is that it is equipped.

That is, the gradation dot distribution curve is a non-linear curve having an approximate S shape, and the position where the rate of change is maximum is outside the middle area of the dial. As a result, it is possible to visually recognize the gradation as a gradation that is smoother and changes more clearly.

In the above-mentioned indicating instrument, it is the gradation dots such as individual fine disc-shaped gradations that form a series of gradations. The technique of the present invention is also applicable to gradations formed by using a transparent substrate and changing the light transmittance distribution of the transparent substrate in a plane to substantially realize the change in the density of transmitted light. It is possible. Alternatively, the present invention is applied not only to such a light-transmissive substrate, but also to a gradation in which a density change is formed by scattering a powdery coloring material on a reflective dial formed of an opaque material. It is possible.

Alternatively, it is possible to apply gradation dots such as individual fine disk-shaped gradation dots or powder to form gradation, but in addition to this, the dial is formed of, for example, a light transmissive material and the light It goes without saying that the technique of the present invention is also applicable to gradations and the like that are formed by substantially changing the density by changing the position of transparency.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an indicating instrument according to the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing a dial portion, in particular, of the indicating instrument according to the present invention, and FIG. 2 is a diagram showing a distribution of gradation density arranged on the display surface side from the central portion to the peripheral portion of the dial. is there.

The indicating instrument of the present invention has an indicator 101 which is rotatable about a rotation axis and a dial 100 on which a scale 102 and a numeral 103 are arranged as indicators corresponding to the indicator 101. The gradation dots 104 are arranged so that the distribution density decreases outward with the rotation axis of the pointer 101 as the center.

In FIG. 1, gradation dots 10
In FIG. 4, only a part in the left lateral direction is shown, and the other parts are omitted and expressed schematically. Actually, it is arranged in all directions on the dial 100. Further, in FIG.
The coordinate axis indicated by 00 is the same as the coordinate axis of the gradation dot density graph shown in FIG. 2, and in order to make the understanding of the relationship between the position on the dial and the dot distribution in FIG. The coordinate axis 300 is additionally shown in FIG.

The position 200, which is an intermediate value of the distribution density of the entire gradation, exists in a region 204 outside the intermediate position 203 between the central position 201 and the position 202 where the index is arranged, and The distribution density in the outer region 204 changes at a non-linear (curve) change rate that is generally convex downward, while the distribution density in the region 205 inside the position 200 that is an intermediate value is convex upward. It is characterized in that it is provided with a dial plate 100 on which gradation dots 104 are arranged, which are distributed so as to change at a rate of change as shown by the non-linear graph.

That is, according to the technique of the present invention, the change in the distribution density of the gradation dots 104 before and after the position 200, which is an intermediate value of the entire distribution density, is represented by a graph 210 having an S-shape as shown in FIG. By arranging in a distribution state that changes in a curve as shown, it is possible to realize a gradation that is recognized as a clear smooth gradation according to human visual recognition characteristics as described below.

According to the present invention, first, the maximum density of gradation (ρ = 100% in FIG. 2) and the minimum density (ρ = 0)
%), A position 200 having an intermediate density (ρ = 50%) is a position of the rotation axis of the pointer, that is, a position 201 substantially at the center of the dial, and an index, that is, a scale or number. Since the gradation dots are distributed so as to come to the region 204 outside the position 203 which is just in the middle of the formed position 202, even in the position of the outside region 204 where the gradation dots look thin in the conventional technique,
The change in the distribution density of the gradation dots 104 becomes clearly visible as a gradation.

Further, according to the technique of the present invention, the distribution density of the gradation dots 104 outside the position 200 which is the intermediate value is set to a non-linear
For example, since it is distributed smoothly according to the cognitive characteristics when the density change is visually perceived by human eyes so that it changes at a rate of change based on an exponential curve, a region outside the position 200 that is an intermediate value Conventionally, the gradation up to 204 was difficult to be visually recognized as a gradation, but the present invention allows the gradation to be visually recognized so as to change smoothly and clearly.

On the other hand, the distribution density in the region 205 inside the position 200 having the intermediate value is in the form of a non-linear graph convex upward from the center 201 to the region 204 outside, that is, the logarithmic function curve. In order to reduce the change rate based on the above, since it is smoothly distributed according to the cognitive characteristics when the density change is visually recognized by human eyes, the gradation from the position of the intermediate value to the inside is In the past, it was difficult to visually recognize as gradation, but according to the present invention, it is visually recognized as a smooth and clear change.

The effect of the visual recognition characteristics of the gradation according to the present invention as described above can be theoretically analyzed. Humans' sensory perceptual effects, including visual sense, change non-linearly with respect to changes in the stimulating effect itself, for example, logarithmically, exponentially, or exponentially. Steven
It is considered to be based on s law or various other ergonomic visual characteristics including the study of Diamond.

Further, the level of visibility by human eyes is
It is known that, for example, the Mach effect (Mach band phenomenon) is influenced not only by the intensity of the optical stimulus, but also by the graphical characteristics of the visual target and the meaning of the visual target. In the case of a dial, such an influence of the visual characteristics is particularly remarkable in the portion where the index, that is, the scale or the number is arranged. That is, even if gradation exists in this portion, it is difficult to visually recognize even gradation because the scales and numbers are recognized first.

However, it is necessary to make the gradation change smoothly and clearly in a particularly conspicuous portion, that is, a portion from the position 200 having an intermediate value (density) to the outer region 204. Moreover, since the area of the outer region 204 has a large area in view of the graphic nature of the circular dial, the distribution density of the gradation dots 104 seems to be thinner. Furthermore, since this portion is the end portion of the gradation, a phenomenon called the Mach effect, in which the contour of the light and shade is emphasized, appears, so that such a visual illusion of light and shade is corrected. For this reason, it is necessary to distribute the gradation dots so that the density distribution of the gradation toward the end of the gradation changes smoothly in a non-linear manner as described above.

For this reason, in the area 204 outside the position 200 where the dot distribution density has an intermediate value, as in the gradation according to the present invention, the density is higher than that of the conventional gradation distribution. Moreover, by arranging the gradation dots 104 by smoothly changing the dot distribution so as to change at a downwardly convex non-linear change rate, it is possible to realize a gradation that can be visually recognized as a clear and smooth gradation.

On the other hand, according to the present invention, even in the area 205 inside the position 200 having the intermediate value, the distribution of the gradation dots 104 is smoothly changed according to the human visual perception characteristics as described above. There is. Conventionally, the distribution density of gradation dots in this portion is changed substantially in proportion to the distance from the center (that is, linearly). However, in that case, the area seems to be narrower toward the central portion due to human visual perception characteristics, and therefore, it looks as if the dot density becomes higher toward the central portion. However, the central part of the dial plate 100 also has a characteristic that it is not conspicuous in contrast to the position 202 where the index such as the scale 102 is arranged because it is the central part.

Therefore, according to the technique of the present invention, the distribution of the gradation dots 104 in the inner area 205 is also smoothly changed according to the recognition characteristic when the density change is visually recognized by the human eye, and is visually recognized as a clear gradation. In addition to the above, the distribution density should be distributed so that the distribution density changes at the rate of change as shown by the above-mentioned non-linear graph so that it smoothly continues with the density change curve outside it. There is.

The positional distribution of the density of the gradation dots 104 on the dial 100 is not limited to the distribution curve shown in FIG. That is, FIG.
In the technique shown in, the distribution density of the gradation dots 104 in the region including the middle position 203 of the dial, which is the position where the gradation is most noticeable, is set higher than before, and the gradation dots 104 before and after the position 203 are The change in distribution density is distributed so as to smoothly change non-linearly according to human visual recognition characteristics, but this is not the only means according to the present invention for making the gradation more clearly visible. .

As shown in FIG. 3, the position 301 where the rate of positional change of the distribution density of the gradation dots 104 (that is, the rate of change of the dot distribution density with respect to the change from the center) is the maximum, is the position of the gradation change. A portion easily visible, that is, the center position 201 and the position 202
The gradation dots 104 are distributed so as to be present in the intermediate region 302 between and. As for the rate of change of the distribution density before and after the position 301 where the maximum rate of change is obtained, the gradation dots 10 are set so as to smoothly change non-linearly according to the human visual cognitive characteristics.
Distribute 4 Also by this, it is possible to realize a gradation which is visually recognized so as to change smoothly and clearly as compared with the conventional gradation.

As a result of producing the dial plate having the gradation distribution according to the present invention as described above and performing a visual examination by a skilled quality inspector, it is possible to visually recognize the change in density or shade as a smooth and clear gradation. Was confirmed. The dial 100 produced at this time is a tachometer for displaying only the uppermost digit of the engine speed and a scale as shown in FIG. The diameter is about 10.5 cm, the ground color of the dial 100 is navy blue, and the index is white.
The numbers 103 from 1 to 9 are each within 7 mm square, and the scale 102 is white and partially red similar to the numbers and has a length of 11 mm and a thickness of 2.5 mm or less.
The gradation dots 104 are arranged in the peripheral portion of the dial plate, and each of them is formed of black ink and has a substantially circular gradation dot 104 of 0.5 mm or less having the density distribution as described above.

In the above embodiment, a logarithmic function curve or an exponential function curve is applied as a non-linear change of gradation, but the technique of the present invention is not limited to this.
As the non-linear change of gradation according to the present invention,
As described above, the visual characteristics of the gradation on the dial 100 that the dot density or the visual density of the conventional gradation appear to be thin and weak in the outer area 204 and look too dark in the inner area 205. Any non-linear curve change that can be corrected may be used. Therefore, as such a non-linear change, a change in accordance with a power series curve based on, for example, Fechner's law or the like may be used in addition to the above.

Although the curve of the density change is said to be convex downward or convex upward, for example, an inflection point or a portion that can be approximated to a straight line is partially in the middle of the curve so that the uneven shape of the entire curve is not impaired. It goes without saying that there may be such things. The density of gradation or the rate of change of density is corrected from a conventional linear change to a downward convex or upward convex direction, and the gradation changes most in the area from the middle position 203 of the dial 100 to the outer area 204. It is only necessary to use a curve capable of correcting the gradation so that the gradation can be corrected so as to satisfy the gradation in which the density or the density is conspicuously corrected.

Further, although the case where the gradation is expressed by reflected light has been shown above, the dial 100 is made of a light transmissive material, and the scale 102 made of an opaque material is provided on the dial 100.
A so-called transmitted light type dial plate on which indexes such as the above and gradation dots 104 are arranged may be used. Alternatively, an opaque material may be used, and a reflected light type dial for viewing with reflected light may be used, and the indicator portion may be a transmitted light type.

Alternatively, in the transmitted light type dial, the gradation is changed to the gradation dot 10 as described above.
No. 4 is used, but the density distribution of the density of the base material of the dial itself or the density of the colored powder for forming a gradation by spreading on the base material is changed to change the density. The present invention is also applicable to the case where a gradation of change is formed. In this case, the dispersion concentration of the colored powder for expressing the gradation may be set to the non-linear distribution as described above.

In the above embodiment, the case where the color of the gradation dots 104 is black and the background color of the dial 100 is navy blue has been described, but the combination of these colors is not limited. Other combinations of various colors are possible, but in that case, it is preferable to use a color that can further improve the visibility.

Further, in the above embodiment, the shape of each gradation dot 104 is made into a disc shape, and the diameter and the number per unit area are changed by position distribution so that the area density distribution as described above or Although the gradation of the density distribution is realized, in addition to this, the shape of the gradation dot 104 may be, for example, a hexagon, a rectangle, or a triangle. Further, the diameter of the gradation dots 104 may be fixed and the density may be changed by changing the number of distributions per unit area.

[0047]

As clearly described in the above detailed description, according to the present invention, the gradation which is clearly visible as a change in color and shade is provided on the dial, and the visual comfort and the visibility are improved. An indicating instrument can be realized.

[Brief description of drawings]

FIG. 1 is a view showing a dial portion of an indicating instrument according to the present invention.

FIG. 2 is a center 20 of the dial plate 100 having a density of gradation dots 104 arranged on the display surface side of the dial plate 100.
It is a figure which shows gradation dot density distribution from 1 to the position 202 of an index.

FIG. 3 is a position 30 where the positional change rate of the distribution density is maximum.
1 is the position 201 of the center and the position 202 where the index is arranged.
It is a figure which shows the density distribution when a gradation dot is arrange | positioned so that it may come to the middle 302 of.

[Explanation of symbols]

100 ... dial 101 ... pointer 102 ... scale 103 ... Number 104 ... Gradient dot 200: Position where the gradation has an intermediate value 201 ... Center position 202 ... Position where the index is arranged 203 ... Intermediate position 204 ... Outer area 205 ... Inside the position 200 which is an intermediate value 210 ... S-shaped graph 301 ... Position where the positional change rate of distribution density is maximum 302 ... Intermediate area

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-186118 (JP, A) JP-A-9-96546 (JP, A) Actual opening 4-104527 (JP, U) Actual opening 3- 27316 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G01D 13/02-13/04 G12B 11/02

Claims (7)

(57) [Claims] 1. A pointer that is rotatable about a rotation axis,
In an indicating instrument having a dial on which at least one of a scale, a number, and a character is arranged as an index corresponding to the pointer, the visual density decreases toward the outside around the rotation axis of the pointer. And the position where the intermediate value of the visual density of the entire gradation is an intermediate value is outside the intermediate position between the center position and the position where the index is arranged, 2. An indicating instrument comprising a dial plate in which gradations are distributed so that the change in the visual density is most noticeable. 2. A pointer which is rotatable about a rotation axis,
In a indicating instrument having a dial on which at least one of a scale, a number and a letter is arranged as an index corresponding to the pointer, a distribution density is reduced toward the outside with a rotation axis of the pointer as a center. Gradient dots distributed in the position where the distribution density is an intermediate value of the distribution density of the entire gradation dot is outside the intermediate position between the center position and the position where the index is arranged. An indicating instrument characterized by comprising a dial plate on which gradation dots are distributed so as to be present. 3. The pointing instrument according to claim 2, wherein the gradation dots are distributed so that the distribution density decreases outward with respect to the rotation axis of the pointer, and the distribution density is the entire gradation dot. The position having an intermediate value of the distribution density is outside the position intermediate between the center position and the position where the index is arranged, and the distribution outside the position having the intermediate value. An indicating instrument characterized by comprising a dial plate on which gradation dots are arranged so that the density is distributed downward so as to change at a non-linear rate of change. 4. The indicating instrument according to claim 2, wherein the gradation dots are distributed such that the distribution density decreases outward with respect to the rotation axis of the pointer, and the distribution density is the entire gradation dot. The position having an intermediate value of the distribution density of is located outside the intermediate position between the position of the center and the position where the index is arranged,
And the distribution density outside the position of the intermediate value changes at a downward convex non-linear rate of change, while the distribution density inside the position of the intermediate value becomes a nonlinear convex upward. An indicating instrument comprising a dial plate on which gradation dots distributed so as to change at a changing rate are provided. 5. A pointer which is rotatable about a rotation axis,
In a indicating instrument having a dial on which at least one of a scale, a number and a letter is arranged as an index corresponding to the pointer, a distribution density is reduced toward the outside around a rotation axis of the pointer. Gradations distributed in such a manner that the position where the rate of change of the distribution density is maximum is outside the intermediate position between the center position and the position where the index is arranged. An indicating instrument comprising a dial plate on which dots are arranged. 6. The indicating instrument according to claim 5, wherein the gradation dots are distributed so that the distribution density decreases outward with respect to the rotation axis of the pointer, and the change rate of the distribution density is maximum. The distribution density outside the intermediate position between the center position and the position where the index is arranged, and the distribution density outside the position where the rate of change is maximum is a non-linear An indicating instrument comprising a dial plate on which gradation dots distributed so as to change at a changing rate are provided. 7. The indicating instrument according to claim 5, wherein the gradation dots are distributed such that the distribution density decreases outward with respect to the rotation axis of the pointer, and the rate of change of the distribution density is maximum. The distribution density outside the intermediate position between the center position and the position where the index is arranged, and the distribution density outside the position where the rate of change is maximum is a non-linear The dial plate is provided with gradation dots that are distributed so that the distribution density inside the position where the rate of change is maximum changes with the rate of change, while the distribution density changes at a non-linear rate of change that is convex upward. Indicating instrument characterized by.