JPH08159815A - Indicating instrument - Google Patents

Abstract

PURPOSE: To provide an indicating instrument in which an indicating needle shaft can be closely disposed, the number of parts is reduced and the deflection of a needle due to back lash is prevented without a gear mechanism provided. CONSTITUTION: A magent 8 to which an indicating needle shaft 7 is fixed is rotatably contained in a bobbin case 14, in the peripheral part 11 of which coils 12, 13 are wound in a crossed form, and the bobbin case is installed in a shield case 15 and at the same time, a fuel level gauge 4 (a first crossed coil type instrument) comprising a crossed coil type instrument and a water temperature gauge 5 (a first crossed coil type instrument) are provided. The fuel level gauge 4 and the water temperature gauge 5 are laminated so that the indicating needle shaft 7 of the fuel level gauge 4 passes through the shield case 15 of the water temperature gauge 5 and the axial line of each indicating needle shaft 7 comes nearly parallel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross-coil type instrument used as, for example, an instrument for a vehicle, and more particularly to a structure in which cross-coil type instruments are arranged close to each other when their pointer axes are arranged close to each other.

[0002]

2. Description of the Related Art Conventionally, as this type of cross-coil type instrument, a magnet is built in a cavity of a bobbin case, and a rotary shaft fixed to the magnet is formed so as to protrude from the upper end of the center of the bobbin case. The output gear is fixed to the end of the rotating shaft, and the rotation of the rotating shaft is transmitted from this gear to the pointer shaft side pivotally supported by the leg of the bobbin case via the driven gear, and the extended end of the pointer shaft There is known a cross-coil type instrument in which a pointer fixed to a portion is operated so as to follow the rotary shaft through the gear mechanism (for example, Japanese Patent Laid-Open No. 6-43187 and Japanese Utility Model Laid-Open No. 4-96066).
As described above, by arranging cross-coil type instruments having pointer axes at positions eccentric from the center of the bobbin case (the axis of the rotary shaft) in close proximity to each other, the pointer axes are brought close to each other, and the pointer pointing space is provided. The configuration is generally designed to make effective use of the.

[0003]

However, in such a cross-coil type instrument, since the pointer shaft is driven through the gear mechanism, an increase in the number of parts cannot be avoided, and the gear is There is a problem that the needle oscillates due to the backlash inherent in the mechanism, and a so-called needle wobbling phenomenon easily occurs.

The present invention has been made in view of this point, and the main purpose thereof is to allow the pointer shafts to be arranged close to each other without increasing the number of parts by the gear mechanism and causing the needle shake phenomenon due to backlash. It is intended to provide an indicating instrument.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has a bobbin case in which a magnet fixedly attached to a pointer shaft is rotatably housed and a coil is wound around the outer periphery of the magnet in a cross shape. At least first and second cross-coil type instruments installed in the case, the pointer shaft of the first cross-coil type instrument penetrating through the shield case of the second cross-coil type instrument, The pointer axes are laminated so that the axes of the pointer axes are substantially parallel to each other.

Further, according to the present invention, at least the pointer shaft of the first cross coil type instrument is made of a non-magnetic material.

Further, according to the present invention, at least the coil of the second cross coil type instrument is wound substantially orthogonally on each side of the bobbin case orthogonal to the axis of the pointer shaft, and the coil winding is performed. The pointer shaft of the first crossing coil type instrument penetrates the bobbin case on the side opposite to the pointer axis line which does not intersect.

[0008]

According to the present invention, the crossing coil type instruments are laminated so that the pointer shaft of the first crossing coil type instrument penetrates the shield case of the second crossing coil type instrument. It is possible to arrange the pointer axes of the cross-coil type instruments in close proximity without providing the above. Therefore, the increase in the number of parts due to the gear mechanism is suppressed, and the needle wobbling phenomenon associated with backlash does not occur.

According to the present invention, the pointer shaft of the first cross-coil type instrument penetrating the inside of the shield case of the second cross-coil type instrument is made of a non-magnetic material,
It is possible to suppress the magnetic influence of the pointer shaft of the first cross coil type instrument on the second cross coil type instrument.

According to the present invention, the pointer shaft of the first cross-coil type instrument penetrates the non-intersecting bobbin case region of the coil winding of the second cross-coil type instrument so that the pointer shaft penetrates. It is possible to easily secure the area in the second crossed coil type instrument.

[0011]

Embodiments of the present invention will be described below with reference to FIGS.

FIG. 1 is a sectional view of an indicating instrument according to this embodiment. Reference numeral 1 denotes a light-shielding ground portion 2a and a light-transmitting display portion 2b. A light guide that guides the light to illuminate the display portion 2b from behind the display plate 1,
Numerals 4 and 5 are fuel gauges (first cross-coil type gauges) and water temperature gauges (second cross-coil type gauges) arranged behind the light guide body 3 and both are cross-coil type gauges, and 6 is each gauge 4 ，
5 is a printed circuit board which is electrically connected.

The fuel gauge 4 and the water temperature gauge 5 are integrally formed with legs 10a and 10b on the side of a cavity 9 for rotatably accommodating a magnet 8 to which a pointer shaft 7 is fixed, and at the outer periphery thereof.
A bobbin case 14 made of synthetic resin in which coils 12 and 13 are wound around 11 is housed in a shield case 15 formed of a cylindrical metal material (for example, SPCC) with a bottom that shields disturbance factors such as geomagnetism. Each of the measuring instruments 4 and 5 is arranged in a stacked state in the vertical direction.

As shown in FIG. 2, the coils 12 and 13 are wound substantially orthogonally on each side of a bobbin case 14 which is orthogonal to the axis of the pointer shaft 7, and the bobbin case of the coils 12 and 13 is wound.
The winding position around 14 is defined by the legs 10a and 10b,
The winding form of each coil 12 and 13 from above is a substantially orthogonal V
It is arranged on one side of the pointer shaft 7 as a letter shape. As a result, a V-shaped vacant region is formed on the side of the pointer shaft 7 opposite to the side where the coils 12 and 13 are wound, and the magnet 8 is rotationally controlled by the magnetic fields of the coils 12 and 13 deviated from the center of rotation. However, each magnetic field is in an orthogonal position passing through its rotation axis and does not affect the magnetic field direction control at all, and the rotation torque of the magnet 8 due to the magnetic force also affects the magnetizing strength of the magnet 8 and the coil.
It can be obtained sufficiently by adjusting the wire diameter of 12 and 13 and the number of turns.

Among the leg portions 10a provided in the V-shaped vacant region due to the coil 12 and 13 winding structure of the bobbin case 14, the leg portion 10a on the water temperature gauge 5 side penetrates along the axial direction of the pointer shaft 7. A hole 16 is formed, and a hole portion 17 communicating with the through hole 16 is formed at a position of the shield case 15 corresponding to the through hole 16. The pointer shaft of the water temperature gauge 5 is formed in the hole portion 17 and the through hole 16. The pointer shaft 7 of the fuel gauge 4 extending longer than 7 is rotatably inserted, whereby the pointer shaft 7 of the fuel gauge 4 penetrates the inside of the shield case 15 of the water temperature gauge 5, and the axis line of each pointer shaft 7 is substantially The fuel gauge 4 and the water temperature gauge 5 are laminated so as to be parallel to each other substantially in the axial direction of each pointer shaft 7. In this case, the pointer shaft 7 of the fuel gauge 4
Is formed of a non-magnetic material such as stainless steel or aluminum.

Of the leg portions 10b formed on the winding sides of the coils 12 and 13 of the bobbin case 14, a terminal 18 for supplying a signal to the coils 12 and 13 is press-fitted or the like to the relatively wide leg portion 10b. Both ends of the terminal 18 are projected from the leg portion 10 and the upper ends thereof are electrically connected to the coils 12 and 13, while the lower ends thereof are electrically connected to the printed circuit board 6 by means such as soldering. It is connected.

Reference numeral 19 is a mounting portion integrally formed upward from the leg portion 10b of each of the measuring instruments 4 and 5 and having a substantially L-shaped cross section, and a screw hole 20 is formed in the upper portion of the mounting portion 19. The fixed portion 21 integrally formed so as to hang down from the light guide 3 is placed on the upper end of the fixed portion 21, and the fixed portion 21 and the mounting portion 19 are positioned and fixed through the positioning portion 22 projectingly formed on the fixed portion 21. By screwing a screw 23 into the screw hole 20 from the portion 21 side, each of the meters 4 and 5 is screwed and fixed to the light guide 3. In this case, the mounting portion 19 is attached to the light guide 3 while inserting the pointer shaft 7 of the water temperature gauge 5 into the insertion holes 24 and 25 formed in the light guide 3 and the display plate 1.
After fixing to the fixing portion 21 of the
Next, through holes 24, 25 formed in 16 and the light guide 3 and the display plate 1
While inserting the pointer shaft 7 of the fuel gauge 4, the mounting portion 19 is fixed to the fixing portion 21 of the light guide body 3, the pointer 26 is attached to the tip of each pointer shaft 7, and the lower end of the terminal 18 is attached to the printed board. 6 should be electrically connected, but the terminal 18
It is also possible to electrically connect the lower end of the printed circuit board 6 and the printed circuit board 6 via a dedicated connector (not shown).

27 is a bobbin case for each of the measuring instruments 4 and 5.
It is a cylindrical projection that is formed in the axial direction of the pointer shaft 7 so as to communicate with the hollow portion 9 in the substantially central portion of 14, and the cylindrical projection 27 axially supports the upper side of the pointer shaft 7 in the radial direction. The tip of the cylindrical protrusion 27 of the fuel gauge 4 is further extended, and the extended cylindrical protrusion 27 penetrates the shield case 15 of the water temperature gauge 5 or is extended. 5 stays in the shield case 15 and only the pointer shaft 7 is shield case 15
By setting the through hole 16 and the hole portion 17 so as to penetrate through, the long pointer shaft 7 of the fuel gauge 4 is protected and the positioning of the respective meters 4, 5 in the axial direction of the pointer shaft 7 is ensured. As a result, the workability of assembling can be improved.

FIG. 4 shows the arrangement of the pointers 26 of the fuel gauge 4 and the water temperature gauge 5 and the display portion 2b, which are arranged close to each other by the above-mentioned structure.
In the example shown in FIG. 1, the pointers 7 are arranged close to each other in the center with a predetermined interval, and the display plate 1 is located on the side of each pointer 7.
A display portion 2b formed of a semicircular graduation index having a symmetrical shape according to the indication range of each pointer 7 and a display portion 2b formed of a character index indicating a measurement amount (value) are formed on each of these. Thus, while the pointers 7 and the display portion 2b are arranged in a concentrated manner, it is possible to make a comparative reading between the pointers 7 and the display portion 2b.

As described above, according to this embodiment, the pointer shaft 7 of the fuel gauge 4 penetrates through the hole 17 and the through hole 16 formed in the shield case 15 of the water temperature gauge 5 and the bobbin case 14, and the fuel gauge 4
The fuel gauge 4 and the water temperature gauge 5 are laminated in the substantially axial direction of the pointer shafts 7 so that the axes of the pointer shaft 7 of FIG. It is possible to arrange the pointer shafts 7 of the respective instruments 4 and 5 close to each other without providing a gear mechanism to the gears. Therefore, it is possible to suppress an increase in the number of parts due to the gear mechanism and to cause a needle runout phenomenon of the pointer shaft 7 due to backlash. There is no such thing. In addition, the fuel gauge 4 and the water temperature gauge 5 are stacked and arranged in the substantially axial direction of the pointer shafts 7 so as to overlap each other in a top view, so that the indicating instrument becomes a direction substantially orthogonal to the substantially axial direction of the pointer shafts 7. The width dimension of can be reduced.

Further, according to this embodiment, since the pointer shaft 7 of the fuel gauge 4 penetrating the inside of the shield case of the water gauge 5 is made of a non-magnetic material, the water temperature gauge 5 by the pointer shaft 7 of the fuel gauge 4 is formed. The magnetic effect in the shield case 15 can be suppressed.

Further, according to the present embodiment, the coils 12 and 13 of each of the measuring instruments 4 and 5 are wound in a cross shape so as to be biased to one side of the bobbin case 14, and the water temperature gauge 5 in which the coils 12 and 13 are wound does not intersect. The leg shaft 10 of the fuel gauge 4 penetrates through the leg portion 10a located in the bobbin case 14 region, thereby facilitating the securing of the region in the shield case 15 of the water temperature gauge 5 for penetrating the pointer shaft 7. Is something that can be done.

In this embodiment, the fuel gauge 4 and the water temperature gauge 5 are used.
Although the case where the coils 12 and 13 are biased to one side of the bobbin case 14 and wound in a cross shape as a (cross coil type instrument) is shown, the pointer shaft 7 of the fuel gauge 4 (first cross coil type instrument) is used. If the penetrating region can be secured in the water temperature gauge 5 (second cross-coil type meter), as shown in FIG.
The coils 12 and 13 are wound substantially orthogonally on both sides of the bobbin case 14 which is orthogonal to the axis of the bobbin case 14, that is, the bobbin case 14 is orthogonal to the bobbin case 14 in a substantially "#" shape about the pointer shaft 7 in a top view. A cross coil type instrument of the type in which the coils 12 and 13 are wound, or a coil on the bobbin case 14 so as to be orthogonal in a substantially "X" shape around the pointer shaft 7 in a top view as shown in FIG.
A cross coil type instrument of the type in which 12 and 13 are wound may be used, and also in the embodiments shown in FIGS. 5 and 6, the pointer shaft 7 of the fuel gauge 4 is the leg of the water temperature gauge 5 in the same manner as in the above embodiments. Part 10a (10
b) The structure penetrates through the position, and the penetrating structure of the pointer shaft 7 and the other meter structures of the fuel gauge 4 and the water temperature gauge 5 are substantially the same as those in the above-described embodiment (in the same or corresponding portions as in the above-mentioned embodiment, The same reference numerals are given and detailed description is omitted).

Further, in each of the above-described embodiments, the case where the same cross coil type instrument having the coils 12 and 13 windings is used as each of the instruments 4 and 5 to be stacked is shown. It is also possible to appropriately combine coil type instruments.

Furthermore, in each of the above embodiments, the fuel gauge 4
The pointer shaft 7 of the (first cross-coil type instrument) penetrates the position of the leg 10a (10b) of the water temperature gauge 5 (second cross-coil type instrument). The penetrating position can be set to an appropriate position as long as it is inside the shield case 15 and outside of the magnet 8.
It may be between 12, 13 and the shield case 14.

[0026]

As described above, according to the present invention, the shield case is internally provided with the bobbin case in which the magnet fixed to the pointer shaft is rotatably accommodated and the outer periphery of which is wound with coils in a cross shape. Each of the first and second cross-coil type instruments, the pointer shaft of the first cross-coil type instrument penetrating through the shield case of the second cross-coil type instrument, By arranging them so that they extend substantially parallel to each other, it is possible to arrange the pointer axes of the crossed coil type instruments in close proximity without providing a gear mechanism,
Therefore, an increase in the number of parts due to the gear mechanism can be suppressed, and the needle wobbling phenomenon due to backlash does not occur.

Further, according to the present invention, at least the first
Second cross-coil type instrument according to the pointer axis of the first cross-coil type instrument penetrating the inside of the shield case of the second cross-coil type instrument by making the above-mentioned pointer axis of the cross-coil type instrument It is possible to suppress the magnetic influence on.

Further, according to the present invention, at least the second
The coil of the cross-coil type instrument is wound substantially orthogonally on each side of the bobbin case orthogonal to the axis of the pointer shaft, and the bobbin on the opposite side of the pointer axis does not intersect the coil winding. Since the pointer shaft of the first cross-coil type instrument penetrates the case, it is possible to easily secure a region in the second cross-coil type instrument for penetrating the pointer shaft.

[Brief description of drawings]

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

FIG. 2 is a top view showing a main part of FIG.

FIG. 3 is a side view of FIG.

FIG. 4 is a top view showing the front side of FIG.

FIG. 5 is a top view showing a main part of another embodiment of the present invention.

FIG. 6 is a top view showing a main part of another embodiment of the present invention.

[Explanation of symbols]

 4 Fuel gauge (first cross-coil type instrument) 5 Water temperature meter (second cross-coil type instrument) 7 Indicator shaft 8 Magnet 11 Outer circumference 12, 13 Coil 14 Bobbin case 15 Shield case

Claims (3)

[Claims] 1. At least first and second intersecting coils in which a magnet fixed to a pointer shaft is rotatably housed and a bobbin case in which coils are wound in an intersecting manner on an outer peripheral portion is internally provided in a shield case. Type measuring instruments are arranged so that the pointer axes of the first cross-coil type instrument penetrate the inside of the shield case of the second cross-coil type instrument and the axes of the respective pointer axes are substantially parallel to each other. Indicating instrument characterized by that. 2. The indicating instrument according to claim 1, wherein at least the pointer shaft of the first cross-coil type instrument is made of a non-magnetic material. 3. The coil of at least the second intersecting coil type instrument is wound substantially orthogonally on each side of the bobbin case orthogonal to the axis of the pointer shaft, and the coil winding does not intersect. The indicating instrument according to claim 1 or 2, wherein the indicator shaft of the first cross-coil type instrument penetrates the bobbin case on the opposite side of the indicator axis.