JPH0611521A - Cross coil type indicator - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a cross-coil type indicating instrument that can easily adjust the position of a zero-point stopper, has a wide adjustment range, and can perform the adjusting work reliably. A lower bobbin 2 has a two-body structure including an outer bobbin 14 forming a coil winding portion 6 and an inner bobbin 15 forming a bearing recess 17 of a rotating shaft 4, and an outer bobbin is formed in a bearing forming portion of the inner bobbin. While forming the extending portion 18 extending outward of the
Since the stopper portion 22 that engages with the engaging plate 9 of the magnet rotor 5 is formed on the inner surface of the inner bobbin, the engaging position between the stopper portion and the engaging plate is shifted by simply rotating the extending portion. The zero point position of the pointer 6 can be adjusted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a direction of a synthetic magnetic field obtained by synthesizing the magnetic fields generated by the pair of coils with each other by passing a current which changes according to a measurement amount into a pair of coils generating mutually perpendicular magnetic fields. The present invention relates to a cross coil type indicator for a vehicle, which rotates a magnet rotor and displays a measured amount by a pointer rotating together with the magnet rotor, and more particularly to a cross coil type indicator equipped with a position adjustable zero point stopper.

[0002]

2. Description of the Related Art A conventional cross-coil type indicator instrument of this type is shown in FIG.
No. 7), an upper bobbin 1 and a lower bobbin 2,
A magnet rotor 5 is rotatably arranged around a rotating shaft 4 inside a coil bobbin C in which two coils 3 are wound orthogonally on the outer peripheral portion. A pointer 6 for displaying a predetermined measurement amount in cooperation with a dial (not shown) is attached. By energizing the coil 3, the rotary shaft 4 of the magnet rotor 5 is rotated to move the pointer 6 to the pointer 6. It is designed to be rotated by a predetermined angle. Also, the coil 3 is not energized and the rotating shaft 4
In a state in which it can freely rotate, the pointer 6 is returned to a predetermined zero position by a zeroing means (not shown).

Between the upper bobbin 1 and the lower bobbin 2, a stopper plate 7 capable of slightly rotating along the mating surface of the coil bobbin C is sandwiched, and the inner peripheral portion of the stopper plate 7 is held. A locking piece 10 is formed on the upper surface of the magnet rotor 5 to enter the annular recess 8 formed in the upper surface of the magnet rotor 5 and engage with the engaging plate 9 formed in the annular recess 8. Then, when the pointer 6 returns to the zero position on the dial by the zero-returning means, the locking piece 10 and the engaging plate 9 are engaged with each other. By configuring 9 and a zero point stopper, the stopper pin provided on the dial for stopping the pointer 6 at the zero position can be omitted.

Further, on the outer peripheral portion of the stopper plate 7, there is formed a protruding portion 12 having a tooth portion 11 at its tip end,
The tooth portion 11 of the protrusion 12 faces the jig hole 13 formed in the outer peripheral portion of the coil bobbin C. Then, a jig (not shown) inserted into the jig hole 13 is adapted to engage with the tooth portion 11 of the protruding portion 12, and the stopper plate 7 is slightly rotated by rotating the jig. As a result, the engagement position between the locking piece 10 of the stopper plate 7 and the engagement plate 9 of the magnet rotor 5, that is, the pointer 6
The stop position of can be adjusted,
The zero point position of the pointer can be adjusted when assembling the vehicle instrument.

[0005]

However, in such a conventional cross coil type indicator, a small jig formed in the jig hole 13 of the coil bobbin C and a small shape formed in the stopper plate 7 are used. 11 of the protrusion 12 of the
Since the stopper plate 7 is rotated to adjust the zero point position by the engagement with, the adjustment work is extremely delicate and the work is difficult.
Further, since the tooth portion 11 of the stopper plate 7 that engages with the jig is not formed on the entire circumference thereof, the rotation adjustment range of the stopper plate 7 is limited to about 10 ° to 20 °, and the adjustment range is not so wide. It also has the disadvantage of not being wide.

Further, since the stopper plate 7 is sandwiched between the upper bobbin 1 and the lower bobbin 2 and the stopper plate 7 is arranged in the cross coil movement, the stopper plate 7 is made of a material such as brass. Need to be made of a soft non-magnetic material, and if excessive force is applied when adjusting the position of the stopper plate 7, the teeth 11 may be damaged and adjustment work may not be possible. I also have.

The present invention has been made in view of the above-mentioned points, and a cross-coil type indicator instrument which can easily adjust the position of a zero-point stopper, has a wide adjustment range, and can surely perform the adjusting work. The purpose is to provide.

[0008]

In order to achieve the above object, a cross-coil type indicator according to the present invention is a rotary shaft having a pointer attached to its tip in a coil bobbin consisting of an upper bobbin and a lower bobbin. A magnet rotor is rotatably arranged around the center of the coil bobbin, and two coils are wound orthogonally around the outer circumference of the coil bobbin to form a cross coil, and a magnetic field generated by the coils is energized by energizing the coils. In a cross coil type indicator instrument in which the magnet rotor is rotated in a direction and the pointer is rotationally driven, the lower bobbin is an outer bobbin that cooperates with the upper bobbin to form a coil winding portion, and The inner bobbin is formed inside the bobbin so as to be movable with respect to the outer bobbin, and has a bearing portion for supporting the end portion of the rotary shaft. Portion is formed to extend outward of the outer bobbin to form a position adjusting operation part for rotationally moving the inner bobbin, and a stopper part that engages with an engaging plate of the magnet rotor on an inner surface part of the inner bobbin. It is characterized by the formation of.

[0009]

According to the present invention, the lower bobbin has a two-body structure including the outer bobbin forming the coil winding portion and the inner bobbin forming the bearing portion of the rotating shaft, and the outer bobbin is formed in the bearing forming portion of the inner bobbin. Since the extended portion extending outward is formed and the stopper portion that engages with the engaging plate of the magnet rotor is formed on the inner surface of the inner bobbin, the stopper portion can be simply rotated. The zero point position of the pointer can be adjusted by shifting the engagement position between the and the engagement plate.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIG. FIG. 1 shows an embodiment of a cross-coil type indicating instrument according to the present invention, which is composed of an upper bobbin 1 and a lower bobbin 2, and has a coil bobbin C in which two coils 3 are wound orthogonally on the outer peripheral portion. A magnet rotor 5 is rotatably arranged around the rotary shaft 4 inside the, and a predetermined measurement amount is displayed at the tip of the rotary shaft 4 in cooperation with a dial (not shown). The pointer 6 is attached. Further, in this embodiment, the lower bobbin 2 is replaced with the outer bobbin 14
And an inner bobbin 15 that is arranged inside the outer bobbin 14 so as to be movable with respect to the outer bobbin 14, and a coil winding portion 16 is provided on the outer surface side of the outer bobbin 14.
At the center of the inner surface of the inner bobbin 15, there is formed a bearing recess 17 filled with silicon (not shown) that rotatably supports the lower end of the rotary shaft 4 of the magnet rotor 5.

On the outer surface of the bearing forming portion of the inner bobbin 15, there is formed an extending portion 18 penetrating the outer bobbin 14 and extending outward. The extending portion 18 is further formed. The magnetic shield case 19 that houses the coil bobbin C and the hard printed circuit board (HPC) 20 that converts a predetermined measurement signal into a drive signal are also formed so as to penetrate therethrough. The extending portion 18 is provided with a stopper portion 22 described later.
Is also configured as a position adjusting operation unit for adjusting the position of the cross coil type movement, and the end portion of the extending portion 18 is fixed by a nut 21 to fix the cross coil type movement on the HPC 20. It is like this.

Further, on the outer periphery of the inner surface of the inner bobbin 15,
An annular recess 8 formed on the lower surface of the magnet rotor 5
A stopper portion 22 that projects into the inside is provided so as to project, and the stopper portion 22 engages with the engagement plate 9 formed in the annular recess 8. Then, when the pointer 6 is returned to the zero position on the dial by a zeroing means (not shown) provided on the rotary shaft 4, the stopper portion 22 and the engaging plate 9 are engaged with each other. Hard stopper 2
The stopper pin provided on the dial plate for stopping the pointer 6 at the zero position on the dial plate can be omitted by configuring the zero point stopper by 2 and the engaging plate 9.

Further, by rotating the end portion of the extending portion 18 and rotating the inner bobbin 15 with respect to the outer bobbin 14, the engagement position between the stopper portion 22 and the engagement plate 9, That is, the zero point position of the pointer 6 can be adjusted.

Next, the operation of this embodiment will be described.
When assembling the above-described vehicle instrument, the work of attaching the pointer 6 to the rotary shaft 4 is performed in the final step, and when attaching the pointer 6, the indicated value on the dial should be accurate. Has been noted. However, even if the pointer 6 is attached in this way, the stop position of the pointer 6 and the zero position of the dial may not match when the pointer 6 returns to the zero position by the zero-returning means.

In such a case, the extension portion 18 which is integral with the inner bobbin 15 protruding from the HPC 20 is pivotally operated, and the stopper portion 22 and the magnet rotor 5 formed on the inner bobbin 15 are rotated.
By shifting the engagement position with the engagement plate 9, the stop position of the pointer 6 can be adjusted. When the zero adjustment of the pointer 6 is completed, the HPC
By screwing the nut 21 onto the end of the extension 18 projecting from the position 20, the adjusted zero point position can be securely held, and the cross coil type movement described above can be fixed on the HPC 20. You can do it.

Therefore, in this embodiment, the lower bobbin 2
Is a two-body structure including the outer bobbin 14 forming the coil winding portion 16 and the inner bobbin 15 forming the bearing recess 17 of the rotary shaft 4, and the outer bobbin 14 is provided outside the outer bobbin 14 at the bearing forming portion of the inner bobbin 15. Since the extended portion 18 is formed and the stopper portion 22 that engages with the engagement plate 9 of the magnet rotor 5 is formed on the inner surface of the inner bobbin 15, it is only necessary to rotate the extended portion 18. The zero point position of the pointer 6 can be adjusted by shifting the engagement position between the stopper portion 22 and the engagement plate 9, and the stopper plate disposed in the coil bobbin C can be rotationally moved by a jig from the outside as in the conventional case. Therefore, the zero point position adjustment work can be performed very easily and reliably, and the configuration of the entire zero point stopper can be made extremely simple. Further, since the extending portion 18 extending from the inner bobbin 15 can rotate 360 ° and the stopper portion 22 moves together with the extending portion 18, the adjustment range of the zero point stopper can be extremely widened.

The present invention is not limited to the above embodiment, but can be variously modified, and although not shown as a structure for holding the adjusted zero point position, HPC
A flange portion may be formed at the end of the extending portion 18 projecting from 20, and a spring member may be elastically mounted between the flange portion and the HPC 20 to hold the stopper position by this spring force. Further, the outer peripheral edge portion of the inner bobbin 15 is formed so as to extend between the upper bobbin 1 and the outer bobbin 14, and the outer peripheral edge portion is held by the winding force of the coil 3 wound around the coil bobbin C to hold the stopper position. May be held.

[0018]

As described above, in the cross coil type indicator according to the present invention, the lower bobbin is composed of the outer bobbin forming the coil winding portion and the inner bobbin forming the bearing portion of the rotary shaft. Since it has a body structure, the extended portion extending outward of the outer bobbin is formed in the bearing forming portion of the inner bobbin, and the stopper portion that engages with the engaging plate of the magnet rotor is formed on the inner surface of the inner bobbin. The zero point position of the pointer can be adjusted by shifting the engagement position between the stopper portion and the engagement plate only by rotating the extension part, and the zero point position adjustment work can be performed extremely easily and reliably. Further, the configuration of the entire zero-point stopper can be made extremely simple, and the adjustment range of the zero-point stopper can be made extremely wide.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a movement of a cross-coil type indicating instrument according to the present invention.

FIG. 2 is a cross-sectional view showing a movement of a conventional cross coil type indicator.

[Explanation of symbols]

 C coil bobbin 1 upper bobbin 2 lower bobbin 3 coil 4 rotating shaft 5 magnet rotor 6 pointer 8 annular recess 9 engaging plate 14 outer bobbin 15 inner bobbin 16 coil winding part 17 bearing recess 18 extension 20 HPC 21 nut 22 stopper

Claims (1)

[Claims] 1. A magnet rotor is rotatably disposed around a rotating shaft having a pointer attached to its tip in a coil bobbin composed of an upper bobbin and a lower bobbin.
Two coils are wound around the outer periphery of the coil bobbin at right angles to form a cross coil, and the magnet rotor is rotated in a direction in which magnetic fields generated by the coils are energized to rotate the magnet pointer. In the cross-coil type indicating instrument, the lower bobbin is provided with an outer bobbin that forms a coil winding portion in cooperation with the upper bobbin, and is movably arranged inside the outer bobbin with respect to the outer bobbin. , An inner bobbin formed with a bearing portion that supports the end of the rotary shaft, and a bearing forming portion of the inner bobbin is formed to extend outward of the outer bobbin to rotate the inner bobbin. A cross-coil type indicator instrument characterized in that a position adjusting operation portion is formed, and a stopper portion that engages with an engaging plate of the magnet rotor is formed on an inner surface portion of the inner bobbin.