JPH09236455A - Indication meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indication meter wherein its assembly is simple and, without affecting design of a dial, the rotation angle of a pointer is regulated. SOLUTION: A rotative shaft 18 is, while penetrating a gauge body 1, rotatively provided. A pointer 21 comprises a base part 22 attached to an upper end part 18a of the rotative shaft 18 and an indication part 23 which rotates following the rotative shaft 18. A stopper member 28, comprising a projected part 29 (rotation side contacting part), is attached to a lower end part 18b of the rotative shaft 18. A cut-raised part 14 (fixed side contacting part) and the projected part 29 are contacted to each other, thus, the rotation angle of the pointer 21 is regulated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an indicator instrument applied as, for example, a vehicle speedometer, fuel gauge, thermometer, etc.

[0002]

2. Description of the Related Art In the related art, an indicating instrument which performs an indicating operation according to a rotation angle of a pointer is provided with a stopper mechanism for restricting a rotation angle of the pointer in order to prevent the pointer from swinging out of an original indication range. It is known that, for example, a stopper pin is erected on a dial plate and an indicator portion of the pointer is brought into contact with the stopper pin to regulate the rotation angle of the pointer (for example, the actual opening number 57- 153265).

[0003]

However, since the above-mentioned indicating instrument is provided with the stopper pin on the dial, there is a fear of impairing the design of the dial. In response to such a problem, an indicating instrument having a stopper mechanism provided in the instrument body has been proposed, and disclosed in Japanese Utility Model Publication Nos. 4-73812 and 5-33063. Such an indicating instrument is one in which a groove is formed in a magnet rotor fixed to a pointer shaft and rotating in the instrument body, and an abutting member having a protruding portion that abuts the groove is provided in the instrument body. The rotation of the pointer is regulated by the protrusion of the contact member contacting the concave groove of the magnet rotor. However, in such a configuration, the stopper mechanism including the concave groove of the magnet rotor and the abutting member is assembled in the instrument main body, and there is a problem that the assembly of the instrument main body becomes complicated.

The present invention provides an indicator instrument which is easy to assemble and which can regulate the rotation angle of the pointer without impairing the design of the dial.

[0005]

According to the present invention, in order to solve the above-mentioned problems, an instrument main body, a rotary shaft rotatably provided through the instrument main body, and attached to an upper end portion of the rotary shaft. A pointer having a base and an indicator that rotates with the rotary shaft, a dial provided with an indicator that is pointed by the indicator, and a rotary side contact that is attached to the lower end of the rotary shaft. A stopper member having a portion, and a fixed-side contact portion that regulates the rotation angle of the pointer by the contact of the rotation-side contact portion.

Further, according to the present invention, the fixed side contact portion is formed by cutting and raising a part of a bottom portion of the instrument body downward.

Further, according to the present invention, the instrument main body is a stepping motor type.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION A pointer 21 is attached to an upper end portion 18a of a rotary shaft 18 which is rotatably provided so as to penetrate the instrument main body 1,
A stopper member 28 is attached to the lower end portion 18b of the. The stopper member 28 is provided with a turning side contact portion 29, and the turning side contact portion 29 is brought into contact with the fixed side contact portions 14 and 33 to regulate the turning angle of the pointer 21. By providing the stopper mechanism including the rotating side contact portion 29 and the fixed side contact portions 14 and 33 on the lower end portion 18b side of the rotary shaft 18, the assembly is easy and the design of the dial 24 is impaired. Without this, the rotation angle of the pointer 21 can be regulated.

If the fixed side contact portion 14 is formed by cutting and raising a part of the instrument main body 1, the reference position of the pointer 21 (for example, by adjusting the angle of the cut and raise of the fixed side contact portion 14). The indicated angle of the zero point can be adjusted.

If the instrument main body 1 is a stepping motor type, there is no fear that the drive torque will be insufficient even if the rotary shaft 18 is provided so as to penetrate the instrument main body 1.

[0011]

An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 and 2 are views showing a first embodiment.

Reference numeral 1 denotes a stepping motor type instrument main body, and the instrument main body 1 is fixed to a substrate 2 with screws 3. The instrument body 1 has a cup-shaped case 6 accommodating a first stator 4 and a second stator 5 welded to a bottom plate 7. The first stator 4 and the second stator 5 are obtained by sandwiching annular bobbins 10 and 11 around which exciting coils 8 and 9 are wound by a pair of yokes 12 and 13, respectively.

The bottom plate 7 of the instrument main body 1 is provided with a cut-and-raised portion 14 (fixed side abutting portion) obtained by cutting and raising a part of the bottom plate 7 approximately 90 degrees downward. Further, as shown in FIG. 2, the bottom plate 7 is formed with a circular through hole 15 that pivotally supports a rotating shaft described later. The substrate 2 is formed with a rectangular through hole 16 through which the cut-and-raised portion 14 is inserted and a circular through hole 17 through which a rotary shaft described later penetrates.

Reference numeral 18 denotes a rotary shaft, and the rotary shaft 18 penetrates through the instrument main body 1 and is rotatably provided. A rotor 19 composed of a cylindrical permanent magnet is fixed to the rotary shaft 18, and the rotary shaft 18 is controlled by a signal (intensity of current) supplied to the exciting coils 8 and 9, and the first stator 4 and the second stator 4 are controlled. It rotates by the magnetic path generated by the stator 5. Reference numeral 20 is a thrust washer made of a sheet-shaped silicone resin. The thrust washer 20 is attached to the rotor 19 to reduce the friction resistance of the rotor 19.

Reference numeral 21 is a pointer, and the base portion 22 of the pointer 21 is a rotary shaft.
Attach to the upper end 18a of 18. The pointer 21 rotates from the base 22
It has a pointing portion 23 extending in the radial direction of 18, and the pointing portion 23 rotates along with the rotating shaft 18 and points a dial plate described later. Reference numeral 24 is a dial plate, and this dial plate 24 is provided with an index portion 25 on which scales, numbers, etc. are printed, and is designated by the pointing portion 23 of the pointer 21. Reference numeral 26 is a supporting member, which is adhered to the upper surface of the instrument body 1, and the dial 24 is supported by the supporting member 26 and fixed by screws 27.

28 is a stopper member, and this stopper member 28 is attached to the lower end portion 18b of the rotary shaft 18. The stopper member 28 has a protruding portion 29 (rotating side contact portion) protruding in the radial direction of the rotating shaft 18. The protrusion 29 contacts the cut-and-raised portion 14, and the rotation angle of the pointer 21 can be regulated so that the indicator 23 of the pointer 21 does not rotate outside the predetermined rotation range.

In the present embodiment, the cut-and-raised portion 14 is formed by cutting and raising a part of the bottom plate 7 of the instrument main body 1, and the cut-and-raising portion 14 lowers a part of the bottom portion of the instrument main body 1 downward. Anything that is cut and raised is acceptable.

According to the first embodiment described above, by providing the stopper mechanism composed of the cut-and-raised portion 14 and the protruding portion 29 on the lower end portion 18b side of the rotary shaft 18 penetrating the instrument main body 1, the instrument main body is provided. There is no fear of complicating the assembly of the instrument main body 1 without providing a stopper mechanism inside the instrument 1. In addition, it is not necessary to erect a stopper pin on the dial 24 as in the conventional case, and the rotation angle of the pointer 21 can be regulated without impairing the design of the dial 24.

Further, when the pointer 21 is attached to the upper end portion 18a of the rotary shaft 18, a slight mounting angle error occurs between the rotary shaft 18 and the pointer 21, and the indicating portion 23 of the pointer 21 does not indicate a predetermined zero point. It is conceivable that the zero point of the indicating portion 23 can be adjusted by adjusting the cut-and-raised angle of the cut-and-raised portion 14.

3 and 4 are views showing a second embodiment. The same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

The rotary shaft 18 penetrates the instrument body 1 and is rotatably provided. Attach the pointer 21 to the upper end 18a of the rotary shaft 18,
A stopper member 28 is attached to the lower end 18b of the rotary shaft 18. A through hole 31 through which the rotary shaft 18 penetrates is formed in the substrate 30 for fixing the instrument body 1. A stopper member is provided in the through hole 31.
A cylindrical surface 32 having a diameter large enough to allow the protruding portion 29 of 28 to rotate and a contact surface 33 (fixed side contact portion) with which the protruding portion 29 abuts are formed (see FIG. 4). The protrusion 29 of the stopper member 28 contacts the contact surface 33, and the rotation angle of the pointer 21 can be regulated so that the indicator 23 of the pointer 21 does not rotate outside the rotation range.

According to the second embodiment described above, the protrusion 29
By providing the stopper mechanism composed of the contact surface 33 and the contact surface 33 on the lower end portion 18b side of the rotating shaft 18 penetrating the instrument body 1, the instrument body 1 can be provided without providing the stopper mechanism in the instrument body 1.
There is no fear of complicated assembly. Moreover, it is not necessary to stand the stopper pin on the dial plate 24 unlike the conventional case,
The rotation angle of the pointer 21 can be regulated without impairing the design of 24.

Incidentally, for example, a stopper pin (fixed side contact portion) may be provided upright on the lower surface of the substrates 2 and 30 for fixing the instrument main body 1, and the same effect as in the first and second embodiments can be obtained. Obtainable. Further, the instrument main body 1 may be a cross coil type, an ultrasonic motor type or the like, but as in the first and second embodiments, the instrument main body 1 is a stepping motor type which has an advantage of large driving torque. Then, even if the frictional resistance of the rotary shaft 18 is slightly increased by providing the rotary shaft 18 so as to penetrate therethrough, there is no fear that the drive torque will be insufficient.

[0024]

According to the present invention, the instrument main body, the rotary shaft that penetrates through the instrument main body and is rotatably provided, the base attached to the upper end of the rotary shaft, and the rotary shaft are rotated together with the rotary shaft. The rotation angle of the pointer is regulated by abutting the pointer having a pointer, a stopper member having a rotation side contact portion attached to the lower end of the rotary shaft, and the rotation side contact portion. The fixed-side abutting portion is provided, the assembly is easy, and the rotation angle of the pointer can be regulated without impairing the design of the dial.

Further, according to the present invention, the fixed side contact portion is formed by cutting and raising a part of the bottom portion of the instrument body downward, and the angle of the cut and raised portion of the fixed side contact portion is adjusted. Thus, the pointing angle at the reference position (for example, zero point) of the pointer can be adjusted.

Further, according to the present invention, the instrument main body is a stepping motor type, and even if a rotary shaft is provided through the instrument main body, there is no fear of insufficient driving torque.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a perspective view of an essential part showing the embodiment.

FIG. 3 is a sectional view showing a second embodiment of the present invention.

FIG. 4 is a perspective view of an essential part showing the embodiment.

[Explanation of symbols]

 1 Instrument main body 14 Cut-and-raised part (fixed side contact part) 18 Rotating shaft 18a Upper end part 18b Lower end part 21 Pointer 22 Base part 23 Indicator part 24 Character plate 25 Indicator part 28 Stopper member 29 Projection part (rotation side contact part) 33 Contact surface (fixed side contact part)

Claims (3)

[Claims] 1. A measuring instrument main body, a rotating shaft which is rotatably provided so as to penetrate through the measuring instrument main body, a base portion attached to an upper end portion of the rotating shaft, and an instruction portion which rotates with the rotating shaft. A pointer having the dial, a dial provided with an indicator pointed by the pointing section, a stopper member having a turning side contact section attached to the lower end of the rotary shaft, and the turning side contact section. A fixed-side contact portion that restricts the rotation angle of the pointer by contacting the indicator needle. 2. The indicating instrument according to claim 1, wherein the fixed-side contact portion is formed by cutting and raising a part of a bottom portion of the instrument body downward. 3. The indicating instrument according to claim 1, wherein the instrument body is a stepping motor type.