JPH067312Y2 - Cross coil type indicator - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a cross-coil type indicator instrument, and in particular, to a cross-coil type indicator instrument suitable for a speedometer unit incorporating an integrator unit mounted on an automobile or the like. Regarding

[Conventional technology]

Conventionally, a current that changes according to the measurement amount is applied to a pair of coils that generate mutually orthogonal magnetic fields, and the magnet rotor is rotated in the direction of the combined magnetic field that combines the magnetic fields generated by the pair of coils. In-vehicle indicating instruments that display a measured amount by an indicator needle that rotates together with a magnet rotor are often used.

FIGS. 3 and 4 show a conventional indicator instrument of this type, in particular, a rotary shaft having an indicator needle attached thereto, in which an integrator unit 2 is arranged close to the cross coil type movement 1 described above. Shows a speedometer unit S of the type arranged between the odometer and the trip meter of the integrating meter unit 2.

The cross-coil type movement 1 has a coil bobbin 3, and a frame 1 of an integrator unit 2 to be described later is provided at a radially symmetrical position of the coil bobbin 3 on an outer peripheral portion thereof.
Flange 4 and 4 for fixing to the back surface of 3 are formed to project. The coil bobbin 3 has two coils 5,
5 are wound so as to be orthogonal to each other, and a disk-shaped magnet rotor 6 having an S pole and an N pole is arranged inside each coil 5. A rotary shaft 7 extending in the axial direction of the coil bobbin 3 is rotatably attached to the center of the magnet rotor 6. The magnet rotor 6 is freely rotatable around the rotating shaft 7 when the coils 5 are not energized, and can be rotated by a predetermined angle by energizing the coils 5. . Also, the rotating shaft 7
An indicator needle 8 for displaying a measured amount is fixed to the tip of the, and a hairspring 9 having one end fixed to the coil bobbin 3 side is attached to the middle of the rotary shaft 7. , This coil spring 9 allows each coil 5
With the magnet rotor 6 free to rotate without being energized, the rotating shaft 7 is urged so that the pointer 8 returns to the 0 position. Further, a case body 10 for blocking a magnetic field is provided on the outer circumference of the coil bobbin 3.

The movement 1 configured as described above has an I
C, resistance, etc. are connected and fixed on a hard printed wiring board (HPC) 11 on the lower surface of which electrical wiring is provided, with a fixing screw 12 that also serves as a terminal terminal 12a, and the speed input to the HPC 11 Measurement signal such as
The HPC 11 converts the drive current into a predetermined drive current and supplies the drive current to the coils 5 through the terminal terminals 12a. Then, the magnet rotor 6 rotates by a predetermined angle according to the combined magnetic field of the magnetic fields generated by the coils 5, whereby the rotating shaft 7 rotates and the indicator needle 8 rotates, so that a predetermined measurement amount is displayed. I have to.

Further, the integrating unit 2 is a frame 1 having a substantially rectangular shape.
In FIG. 3, the odometer 14 and the trip meter 15 are rotatably supported side by side.
The trip meter 15 is sequentially shifted by a pinion (not shown) from the lower numeral wheel to the upper numeral wheel. A light guide plate 16 and a dial plate 17 are placed and fixed on the upper surface of the integrating unit 2. A connecting beam 13a located between the odometer 14 and the trip meter 15 is provided between the side walls (not shown) of the frame 13 which face each other, and the connecting beam 13a is provided at the central portion in the longitudinal direction. A shaft hole 18 through which the rotary shaft 7 penetrates is formed. Then, the shaft hole 18 and the shaft holes 19 of the light guide plate 16 and the dial plate 17 which are formed in a portion corresponding to the shaft hole 18,
An HPC in which the movement unit 1 is fixed so that the rotary shaft 7 penetrates the inside of 20 and the accumulator unit 2 is fixed.
If the mounting position of the integrator unit 2 is determined so that the lower surface of the connecting beam 13a contacts the flanges 4 and 4 of the coil bobbin 3, the cross coil type movement 1 and the integrator unit 2 are placed. And a speedometer unit S including

Then, the movement 1 and the integrating unit 2 are
The flange 4 of the coil bobbin 3 from the dial 17 side
A set screw 21 is screwed in toward and is positioned and fixed.

[Problems to be solved by the device]

However, in the above-mentioned conventional indicating instrument, the positioning and fixing work of the movement 1 and the integrating unit 2 are performed from the dial 17 side to the coil bobbin 3 side by the dial 17,
Since the movement is performed by the setscrews 21 penetrating through the respective fool holes 22, 23 and 24 formed in the light guide plate 16 and the frame 13 of the integrator unit 2, the movement 1 and the integrator unit 2, the light guide plate 16 and the letters. The plate 17 is slightly displaced, and in the worst case, the movement 1 comes into contact with the odometer 14 and the trip meter 15 of the integrator unit 2, and the integrator does not operate sufficiently.

The present invention has been made in view of the above points, and in particular, in the type in which the rotary shaft of the movement having the indicator needle attached is arranged between the odometer and the trip meter of the totalizer, the movement and the total meter are It is an object of the present invention to provide a cross-coil type indicating instrument capable of easily performing the positioning work with and with sufficient accuracy.

[Means for Solving the Problems]

In order to achieve the above object, a cross coil type indicator according to the present invention forms a cross coil by winding two coils on a coil bobbin in directions orthogonal to each other, and energizes each coil inside the cross coil. A movement is constructed by arranging a magnet rotor that rotates a predetermined angle around the rotation axis according to the combined magnetic field of the magnetic fields generated by the coils, and a totalizer unit is arranged in the vicinity of this movement. In a cross-coil type indicator instrument having an indicator needle attached to the distal end of, a pair of posts are formed on the outer peripheral portion of the coil bobbin so as to face each other with the rotary shaft interposed therebetween, and in the frame of the integrator unit,
A positioning hole and a positioning groove are formed in a portion corresponding to the pair of posts, and the upper ends of the pair of posts are fitted into the positioning hole and the positioning groove, respectively.

[Action]

According to the present invention, the positioning work of the movement and the totalizer unit is performed by fitting the upper ends of the pair of posts formed on the coil bobbin into the positioning holes and the positioning grooves formed on the frame of the totalizer unit, respectively. As a result, the movement and the integrating unit can be easily positioned with sufficient accuracy,
It is possible to prevent the movable part of the totalizer unit from coming into contact with the movement.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. The same parts as those in the conventional art are designated by the same reference numerals.

1 and 2 show a vehicle speedometer unit S having a movement 25 having the structure of the present invention, and in particular, an odometer 1 in which a rotary shaft 7 to which an indicating needle 8 is attached is a totalizer.
4 and the trip meter 15 are arranged.

The movement 25 is a cylindrical magnetic shielding case body 10.
The coil bobbin 26 is housed inside the coil bobbin 26, and the two coils 5 and 5 are wound around the coil bobbin 26 so as to be orthogonal to each other. Four posts 27 for winding at right angles are formed integrally with the coil bobbin 26 at 90 ° intervals. Then, of the four posts 27, a pair of posts 27 a, 27 located on the odometer 14 and trip meter 15 sides and facing each other.
Each b is formed to be short, and this short post 27
The odometer 14 and the trip meter 15 are arranged above the a and 27b, respectively, and the odometer 14 and the trip meter 15 are arranged close to each other. Further, of the posts 27, the pair of posts 27c and 27d, which are formed 90 degrees apart from the pair of short posts 27a and 27b, are formed to be tall, and the pair of posts 27c and 27d are A positioning pin 28 that fits into a positioning hole 32 of the frame 13 of the integrator unit 2 to be described later is formed on the upper end of one of the posts 27c, and a balance spring, which will be described later, is formed on the upper end of the other post 27d. A substantially L-shaped groove 29 into which the free end of 9 is inserted and fixed is formed.

Further, inside the coil bobbin 26, a disk-shaped magnet rotor 6 having S poles and N poles formed at diametrically symmetrical positions is disposed, and at the center of the magnet rotor 6, the coil bobbin is provided. A rotary shaft 7 extending in the axial direction of 26 is attached. Then, in the state where the magnet rotor 6 is not energized to the coils 5,
Via pin terminals 30 which are freely rotatable around the rotary shaft 7 and which are provided at terminal mounting portions 26a and 26a formed by extending the outer peripheral edge of the coil bobbin 26 outside the posts 27c and 27d, respectively. Each coil 5 is energized so that it can be rotated by a predetermined angle. An indicator needle 8 is fixed to the tip of the rotary shaft 7, and a predetermined measurement amount is displayed by rotating the indicator needle 8 by a predetermined amount. Further, a balance spring 9 is attached to a middle portion of the rotary shaft 7, and a free end portion of the balance spring 9 is bent into a substantially L shape and formed on an upper end surface of the post 27d. It is designed to be inserted and fixed in the substantially L-shaped groove 29. The pointer 8 is returned to the 0 position by the urging force of the balance spring 9.

The movement 25 configured as described above has an I
Arranged on a hard printed circuit board (HPC) 11 to which C, resistors, etc. are connected and electric wiring is provided on the lower surface,
It is fixed, and is fixed by a fixing screw 31 which penetrates the HPC from the lower surface of the HPC 11 and is screwed into the terminal mounting portion 26a of the coil bobbin 26. The accumulator unit 2 is placed and fixed on the HPC 11 to which the movement 25 is fixed such that the rotary shaft 7 of the movement 25 is located between the odometer 14 and the trip meter 15.

The accumulator unit 2 is arranged in a substantially rectangular frame 13 side by side with the odometer 14 and the trip meter 15. The odometer is provided between side walls (not shown) of the frame 13 facing each other. 14 and trip meter 15
A connecting beam 13a located between and is provided. A shaft hole 18 through which the rotary shaft 7 of the movement 25 passes is formed in the central portion in the longitudinal direction of the connecting beam 13a.
The positioning pin 2 at the upper end of one tall post 27c formed on the coil bobbin 26 is provided on one side of the connecting beam 13a with the shaft hole 18, that is, the rotating shaft 7 interposed therebetween.
8 has a positioning hole 32 formed therein, and a positioning groove 33 into which the upper end of the other tall post 27d of the coil bobbin 26 is fitted is formed on the lower surface of the other side of the connecting beam 13a. Therefore, the pair of protrusions 34, 34 are formed. Then, the upper ends of the pair of posts 27c and 27d of the coil bobbin 26 are fitted into the positioning holes 32 and the positioning grooves 33 of the connecting beam 13a of the frame 13, respectively, so that the odometer 14 and the trip meter 15 are separated from each other. The rotary shaft 7 of the movement 25 is positioned between them, and the odometer 14 and the trip meter 15 are positioned so as not to come into contact with the movement 25, so that the integrator unit 2 is connected to the HPC 11
It is designed to be placed and fixed on top.

Reference numeral 16 in the figure is a light guide plate which is positioned and placed on the frame 13 of the integrator unit 2 and serves as a prism for guiding the illumination light of an illumination bulb (not shown) to the odometer 14 and trip meter 15 of the integrator. Is indicated by reference numeral 1
Reference numeral 7 is a dial arranged on the light guide plate 16 and displaying a predetermined measured amount in cooperation with the pointer 8.

In the present embodiment, the measurement signal such as the vehicle speed is the HPC1.
1, a predetermined process is performed by the HPC 11 and a predetermined current as a drive signal is supplied to each of the coils 5 via the pin terminal 30, and the magnetic field generated by each of the coils 5 is changed. According to the synthetic magnetic field, the magnet rotor 6 is rotated by an angle corresponding to the measured amount, whereby the rotary shaft 7 is rotated, and the indicator needle 8 fixed to the tip of the rotary shaft 7 is moved on the dial plate 17. The measurement amount is displayed by rotating. At this time, the hairspring 9 is gradually rolled up as the rotary shaft 7 rotates, and the urging force is accumulated. When the coils 5 are not energized, such as when the vehicle is stopped, the urging force of the balance spring 9 causes the indicator needle 8 to rotate and return to the 0 position.

Therefore, in the present embodiment, the positioning work of the movement 25 and the integrating unit 2 is performed by the coil bobbin 2.
The upper ends of the pair of posts 27c and 27d formed in 6 are
Since the positioning is performed by fitting the positioning hole 32 and the positioning groove 33 formed in the frame 13 of the totalizer unit 2 respectively, the movement 25 and the totalizer unit 2 can be easily positioned with sufficient accuracy. it can. Therefore, it is possible to prevent the odometer 14 and the trip meter 15 of the integrating unit 2 from coming into contact with the movement 25.

[Effect of device]

As described above, the cross-coil type indicator according to the present invention performs positioning work for the movement and the integrator unit by adjusting the upper ends of the pair of posts formed on the coil bobbin.
Since the positioning is performed by fitting the positioning holes and the positioning grooves formed in the frame of the totalizer unit, the movement and totalizer unit can be easily positioned with sufficient accuracy. It is possible to prevent the movable portion from coming into contact with the movement, and it is possible to ensure a sufficient operation of the integrator.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention, respectively, and FIGS. 1 and 2 are sectional views of a speedometer unit of an automobile having the structure of the present invention, FIG. 3 and FIG. FIG. 4 is each sectional view showing a conventional speedometer unit. S ... Speedometer unit, 2 ... Totalizer unit, 5 ... Coil, 6 ... Magnet rotor, 7 ... Rotation axis, 8 ... Indicator needle,
13 ... Frame, 13a ... Connecting beam, 14 ... Odometer,
15 ... Trip meter, 25 ... Movement, 26 ... Coil bobbin, 27a, 27b, 27c, 27d ... Post, 28 ... Positioning pin, 32 ... Positioning hole, 33 ... Positioning groove.

Claims (1)

[Scope of utility model registration request] 1. A cross coil is formed by winding two coils around a coil bobbin in directions orthogonal to each other, and a cross coil is formed inside the cross coil in accordance with a combined magnetic field of magnetic fields generated by energization of the coils. A cross coil in which a magnet rotor that rotates a predetermined angle around a rotating shaft is arranged to form a movement, an integrating unit is arranged in the vicinity of this movement, and an indicator needle is attached to the tip of the rotating shaft. In the shape indicator, a pair of posts are formed on the outer peripheral portion of the coil bobbin so as to face each other with the rotary shaft interposed therebetween, and the frame of the accumulator unit has a positioning hole and a position corresponding to the pair of posts. A cross groove is characterized in that a positioning groove is formed, and the upper ends of the pair of posts are fitted into the positioning hole and the positioning groove, respectively. Il-shaped indicator.