JPS6331010Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a moving coil type instrument that mechanically limits the deflection range of the pointer and has an adjustable stopper. , a movable part that is provided on the pointer shaft and rotates together with the pointer shaft, and a stopper that engages with this movable part to mechanically stop the operation of the pointer, and a stopper that engages with this movable part. This invention relates to a moving coil type instrument that limits the range of deflection of a pointer.

Japanese Utility Model Publication No. 52-53465 proposes a moving coil type instrument of this type in which a stopper is screwed together with a yoke to the instrument case. In the case of such a stopper structure, the stopper itself may be deformed using a special tool to adjust the zero point or the deflection range of the pointer. In this case, the stopper is directly plastically deformed to make fine adjustments. Therefore, the adjustment requires skill, and the adjustment part of the stopper is located close to the movable part of the instrument, making it difficult to perform the adjustment work.

The purpose of the present invention is to provide a moving coil type meter that is easy to adjust, and to achieve this purpose, the characteristic structure is a bearing fixed to the fixed part of the meter such as the housing of the meter. In a movable coil type instrument that has a pointer shaft that is pivoted on a shaft and operates by rotating angularly, and a stopper provided on the pointer shaft for mechanically stopping the operation of the movable part of the instrument, the bearing is fixed to the instrument. A stopper is disposed between a flange formed protruding from the side peripheral surface of the bearing and the instrument fixing part side, and the stopper is rotatably supported about the bearing as a pivot. It's because I kept it.

Next, an embodiment based on the above characteristics will be described with reference to the accompanying drawings.

To explain the moving coil type meter of the first embodiment with reference to FIG. 1, a synthetic resin housing 1 is provided with two terminals 2 (one terminal is omitted) for inputting a current according to a measured value. One end of each of the two beards 4 separated by an insulating plate 3 is fixed to the holder. This mustache Zenmai 4 is wound around a pointer shaft 5 with a pointer (not shown) attached to the tip, and is made of a conductive material that has the function of pushing the pointer back toward the zero position, and the other end is connected to the pointer shaft 5. Each of the coils is connected to a winding 8 wound around a hollow prismatic coil frame 7 held by the coil holder 6 through two pins (not shown) provided upright on the interlocking coil holder 6 .

A horseshoe-shaped first yoke 9 made of a magnetically conductive material is located in the hollow part of the coil frame 7, and the end of the first yoke 9 is attached to a lower housing 10 made of synthetic resin that abuts the lower end of the upper housing 1. Further, a second yoke 11 on a flat plate made of a magnetic conductive material is fixed to the lower housing 10, facing the first yoke 9, and the lower end of the pointer shaft 5 is fixed to the second yoke 11. A lower bearing 12 that holds the is fixed.

An annular magnet 13 having a hole into which the lower bearing 12 is inserted is attached to the lower surface of the second yoke 11, and a third yoke 14 made of a magnetic conductive material is attached to the lower surface of the magnet 13. The magnet 13, the second yoke 11, the first yoke 9, the fourth yoke, and the third yoke are A magnetic closed circuit of the yoke 14 is formed, and the pointer is rotated to a balanced position according to the amount of current applied to the winding 8 to indicate the amount to be measured.

However, in this first embodiment, the lower bearing 12
A flange 12a is formed on the upper circumferential surface, a circular hole 15a of a thin plate-shaped stopper 15 is inserted into the lower bearing 12, and the stopper 15 is placed between the upper surface of the second yoke 11 and the flange 12a of the lower bearing 12. intervene,
The stopper 15 is fixed to the second yoke 11 by caulking or the like, and is rotatably supported and held on the lower bearing with the lower bearing 12 as a support shaft. The stopper 15 is provided with an engagement piece 15b that engages with a coil frame 7 that rotates together with the movable part of the pointer shaft 5, or a balancer (not shown) or the like. Also, the stopper 15 has the housing 1 of the instrument.
An adjustment protrusion 15c that can be adjusted from the outside is provided. Therefore, at the same time as fixing the lower bearing 12 to the second yoke 11, the stopper 15 is fixed to the flange 12a of the lower bearing 12 and the second yoke 11.
It is possible to simplify the assembly work by holding it between the top surface and the top surface. Also stopper 1
The adjustment protrusion 15c provided at 5 can be rotated and adjusted from the outside of the instrument housing 1, and the rotation stop position of the pointer can be set with a simple operation.

FIG. 3 shows a moving coil type meter according to the second embodiment, and its principle is basically the same as that of the first embodiment, so a description thereof will be omitted. An upper yoke 9a located in the hollow part of the coil frame 7 is provided on the upper part of the magnet 13, and a lower yoke 11a is provided on the lower part of the magnet 13.
A stopper 15 is interposed between the upper surface of a and the flange 12a of the lower bearing 12, and the lower bearing 12 is fixed to the lower yoke 11a by caulking or the like. It is rotatably supported.

In that case, as shown in FIG. 4B, a wave washer 16 is interposed between the stopper 15 and the flange 12a, or as shown in FIG. 17, and the wave washer 1
The stopper 15 is resiliently supported and held by the convex portion 6 or the convex portion 17. Although the diagram shows a case in which the stopper 15 is provided with the convex portion 17, the flange 12a
Alternatively, a convex portion may be integrally formed to protrude from the lower yoke 11a.

Therefore, the stopper 15 is partially crimped by the wave washer 16 or the convex portion 17, making it difficult to move blindly. Further, when the stopper 15 is operated from the outside of the housing 1, the stopper 15 is in point contact with the wave washer 16 or the convex portion 17, and the degree of friction is smaller than in surface contact, making it easier to rotate.

Although the above description shows the case where the stopper 15 is supported and held by the lower bearing 12, the stopper 15 may be supported and held by the upper bearing 12b fixed to the instrument housing 1. In that case, a stopper 15 may be provided on each of the lower bearing 12 and the upper bearing 12b, upper and lower limits of the pointer may be determined, or two
Two stoppers may be arranged one on top of the other, and engagement pieces for the upper limit and the lower limit may be provided on the stopper.

As mentioned above, the present invention is based on a pointer shaft that is rotatably supported by a bearing fixed to a fixed part of the instrument such as the instrument housing, and that operates by rotating at an angle. In a moving coil type instrument having a stopper for stopping the instrument, the bearing is fixedly held on the instrument fixing part side, and a stopper is provided between the flange formed protruding from the side peripheral surface of the bearing and the instrument fixing part side. The stopper is rotatably supported using the bearing as a pivot, so the upper limit position or lower limit position can be adjusted accurately and easily by rotating the stopper, making the instrument suitable for mass production. . Further, when performing adjustment work, there is an effect that the adjustment work can be easily performed by adjusting the lever without requiring a special tool.

[Brief explanation of the drawing]

Fig. 1 is a structural explanatory diagram of a moving coil type instrument showing the first embodiment of the invention, Fig. 2A is a plan view showing the structure of the stopper of the invention, Fig. 2B is a sectional view of the same, and Fig. 3 4 is a structural diagram of a moving coil type meter showing a second embodiment, FIG. 4A is a plan view showing a stopper structure of the same meter, and FIGS. 4B and 4C are sectional views showing the stopper structure. 1... Upper housing, 5... Pointer shaft, 7...
Coil frame, 10... Lower housing, 11, 11
a...second yoke, 15...stopper.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A pointer shaft that is rotatably supported by a bearing fixed to a fixed part of the instrument such as the instrument housing and rotates at an angle, and that controls the operation of the movable part of the instrument provided on this pointer shaft. In a moving coil type instrument having a stopper for mechanically stopping, the bearing is fixedly held on the instrument fixing part side, and between a flange formed protruding from the side peripheral surface of the bearing and the instrument fixing part side. A moving coil type instrument, characterized in that a stopper is disposed at the holder, and the stopper is rotatably supported and held using the bearing as a support shaft. 2. The moving coil type instrument according to claim 1, wherein the stopper is provided with an adjustment protrusion that can be operated from the outside of the housing.