JPH0725707Y2 - Cross coil type indicator - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a cross-coil type indicator, particularly a speedometer,
The present invention relates to a cross coil type indicator instrument suitable for various vehicle-mounted instruments such as a tachometer and a water temperature gauge.

[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 a pointer that rotates together with a magnet rotor are often used.

FIGS. 2 to 4 show a conventional movement 1 of this kind of indicating instrument. This movement 1 has a coil bobbin 2 composed of an upper bobbin 2a and a lower bobbin 2b. On the outside of the two coils 3,3
Are wound so that they are orthogonal to each other. A disk-shaped magnet rotor 4 having an S pole and an N pole is arranged inside the coil bobbin 2 around which the coils 3 and 3 are wound. Is
A rotary shaft 5 extending in the axial direction of the coil bobbin 2 is attached. A bearing recess 6 is formed in the center of the lower surface of the magnet rotor 4 housing portion of the coil bobbin 2. The bearing recess 6 and the entire lower surface of the magnet rotor 4 housing portion are filled with silicon 7.

The lower end of the rotary shaft 5 is rotatably supported by the bottom surface of the bearing recess 6, and the lower surface of the magnet rotor 4 is positioned in the silicon 7,
The rotation shaft 5 is braked. Further, the magnet rotor 4 is freely rotatable around the rotating shaft 5 when the coil 3 is not energized, and by energizing the coils 3, the magnet rotor 4 can be rotationally driven by a predetermined angle. ing.

Further, a dial 8 is attached to the upper surface of the movement 1, and a pointer 9 is fixed to a portion of the rotary shaft 5 projecting from the dial 8 to form an instrument unit with the above configuration. It is what is done.

Reference numeral 10 is a movement case that houses the coil bobbin 2 and blocks the magnetic field.

In the above conventional indicating instrument, by supplying a predetermined current as a drive signal based on a predetermined measurement signal to each of the coils 3, the magnet rotor 4, in accordance with the combined magnetic field of the magnetic fields generated by the coils 3, That is, the rotary shaft 5 is rotated and the pointer 9 is rotated on the dial 8 to display the measured amount.

At this time, the rotating shaft 5 is rotationally driven while being applied with a braking force by the silicon 7 in the coil bobbin 2, so that unnecessary swinging of the rotating shaft 5, that is, the pointer 9, is prevented. I have to. Then, when the coils 3 are not energized, such as when the vehicle is stopped, the rotary shaft 5 is allowed to rotate freely, and the pointer 9 is rotated by the zero-return force by the zero-return means (not shown). To return to a predetermined zero position.

[Problems to be solved by the device]

However, in the above-mentioned conventional indicating instrument, as shown in FIG. 4, the movement 1 is used by mounting it in the instrument panel 11 of the vehicle in such a posture that the rotary shaft 5 becomes substantially horizontal. Therefore, the silicon 7 may move in the coil bobbin 2 and be unevenly distributed in a part of the coil bobbin 2 due to long-term use.
The silicon 7 may leak from the split surface 12 between the upper bobbin 2a and the lower bobbin 2b of the coil bobbin 2 to the outside of the coil bobbin 2. If the silicon 7 leaks in this way, the entire movement 1 is contaminated with the silicon 7. I have a problem.

The present invention has been made in view of the above points, and an object of the present invention is to provide a cross-coil type indicating instrument capable of reliably preventing the occurrence of silicon leakage to the outside of the coil bobbin.

[Means for Solving the Problems]

In order to achieve the above object, a cross-coil type indicating instrument according to the present invention has a coil bobbin that can be divided into two,
Centering around the rotating shaft that is supported by the coil bobbin and is given a braking force by the silicon filled in the coil bobbin,
A magnet rotor is rotatably arranged, and two coils are wound outside the coil bobbin in directions orthogonal to each other to form a movement, and a combined magnetic field of magnetic fields generated by energization of the coils is generated. Accordingly, in the cross-coil type indicator that drives the magnet rotor to rotate by a predetermined angle, the split surface of the coil bobbin is formed above the liquid surface of the silicon unevenly distributed in the coil bobbin due to the mounting posture of the movement. It is a feature.

[Action]

According to the present invention, since the split surface of the coil bobbin is formed above the liquid surface of the silicon unevenly distributed in the coil bobbin due to the mounting posture of the movement, there is no possibility that the silicon leaks from the split surface of the coil bobbin.
As a result, it is possible to prevent the entire movement from being soiled with silicon.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIG. 1, and the same parts as those in the prior art will be designated by the same reference numerals.

FIG. 1 shows an embodiment of the present invention. A movement 1 of an indicating instrument mounted in an instrument panel 11 of a vehicle has a coil bobbin 2 which can be divided into two. Two coils 3, 3 are wound on the outside of the so as to be orthogonal to each other. Also,
Inside the coil bobbin 2 around which the coils 3 and 3 are wound, a disk-shaped magnet rotor 4 having S poles and N poles is arranged. At the center of the magnet rotor 4, Rotating shaft 5 extending in the axial direction of the coil bobbin 2
Is attached.

The magnet rotor 4 is freely rotatable around the rotating shaft 5 when the coils 3 are not energized, and the energization of the coils 3 causes the combined magnetic field generated by the coils 3 to be generated. According to the above, it can be rotated by a predetermined angle.

Further, a dial 8 is attached to the upper surface of the movement 1, and a pointer 9 is fixed to a portion of the rotary shaft 5 which is rotationally driven and which projects from the dial 8.
A predetermined instruction display is made by the dial 8 and the pointer 9.

Further, the coil bobbin 2 is filled with a predetermined amount of silicon 7, whereby a predetermined braking force is applied to the rotary shaft 5 to rotate the rotary shaft 5.
That is, unnecessary touching of the pointer 9 is prevented.

Reference numeral 10 is a movement case that houses the coil bobbin 2 and blocks the magnetic field.

In the present embodiment, as shown in the figure, the movement 1 is used by being mounted in the instrument panel 11 of the vehicle in a posture in which the rotary shaft 5 is substantially horizontal, and therefore the , The coil bobbin 2
The silicon 7 filled inside may move in the coil bobbin 2 and be unevenly distributed in a part of the coil bobbin 2.

Therefore, in the present embodiment, the liquid level above the liquid level 7a of the silicon 7 unevenly distributed in the coil bobbin 2 is
Since the split surface 12 of the coil bobbin 2 that is substantially parallel to the coil bobbin 2 is formed and the split surface 12 divides the coil bobbin 2 into two parts, the split surface 12 of the coil bobbin 2 is different from the conventional one.
There is no possibility that the silicon 7 with which the coil bobbin 2 is filled leaks out of the coil bobbin 2, so that it is possible to prevent the movement 1 from being soiled by the leaked silicon.

[Effects of the Invention] As described above, in the cross coil type indicator according to the present invention, the split surface of the coil bobbin is formed above the liquid surface of silicon unevenly distributed in the coil bobbin due to the mounting posture of the movement. There is no risk of silicon leaking from the dividing surface,
This has the effect of preventing the entire movement from being contaminated with silicon.

[Brief description of drawings]

FIG. 1 is a view showing a state in which a movement according to an embodiment of the present invention is attached, FIG. 2 is a perspective view of a conventional movement, FIG. 3 is a schematic sectional view of a conventional movement, and FIG. It is a figure which shows the attachment state of a movement. 1 ... Movement, 2 ... Coil bobbin, 3 ... Coil, 4
… Magnet rotor, 5… Rotation axis, 7… Silicon, 8…
Dial, 9 ... pointer, 11 ... instrument panel, 12 ...
Split plane.

Claims (1)

[Scope of utility model registration request] 1. A coil bobbin that can be divided into two,
Centering around the rotating shaft that is supported by the coil bobbin and is given a braking force by the silicon filled in the coil bobbin,
A magnet rotor is rotatably arranged, and two coils are wound outside the coil bobbin in directions orthogonal to each other to form a movement, and a combined magnetic field of magnetic fields generated by energization of the coils is generated. Accordingly, in the cross-coil type indicator that drives the magnet rotor to rotate by a predetermined angle, above the liquid surface of the silicon unevenly distributed in the coil bobbin due to the mounting posture of the movement,
A cross-coil type indicating instrument characterized in that a split surface of the coil bobbin is formed.