JPS587162B2 - pivot - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pivot bearing used in meters, and the gist thereof is to provide a gap adjustment technique related to conventional screw-type fixing in fixing the pivot bearing to a frame in the meter assembly process. A method for fixing a pivot bearing that can omit the steps of manual means and adjustment time thereof, and also allows the gap in the relative relationship between the pivot and the pivot bearing to be determined within an allowable range by extremely simple means when fixing the pivot bearing. The reason lies in the fact that it was developed.

Conventionally, pivot bearings are fixed by screwing screws provided on the outer periphery of the bearing into screw holes on the frame side to fix the pivot bearing to the frame, and then a skilled engineer finely adjusts the required gap with the pivot to the set position. I was assembling it to fix it.

However, such a configuration requires spring washers and other parts between the bearing and the frame, making assembly complicated, requiring skill in selecting the gap between the pair of pivots, and requiring a small meter. In the current situation where gap adjustment is dependent on the feeling of the engineer, there is an inconvenience that product variations occur.

Furthermore, it has recently become difficult to train such engineers in the process of mass production, which is not suitable for labor saving in the production process.

The present invention solves the above-mentioned drawbacks of the conventional example, simplifies the assembly of the pivot bearing, and also makes it possible to fix the pivot bearing without the troublesome gap adjustment. An example will be explained.

In Fig. 1, reference numeral 1 denotes a moving coil along the outer periphery of the iron core 2, with pivots 3, 3 protruding from above and below in a normal configuration, and 4.
, 4 are pivot bearings that engage with the hinges 3, 3, respectively.

Thus, the pivot bearing 4 is in a relationship with the frame 5 to which it is fixed, so that the pivot bearing 4 can be inserted into the bearing hole 6 formed in the frame 5 by its own weight, In so-called assembly, as shown in the figure, a gap gauge 7 with a thickness of g1 is inserted and set in a position opposite to the iron core 2 and the moving coil 1, and the tip of the pivot 3 of the moving coil 1 is set in advance in the direction of the pivot bearing. The pivot bearing 4 is positioned opposite to each other and dropped into the bearing hole 6 of the frame, and then the pivot bearing 4 and the frame 5 are quickly glued with an appropriate adhesive 8 such as instant adhesive while keeping the pivot bearing 4 and frame 5 in the above-mentioned state. Fixed to.

After fixing the pivot bearing 4, leave the movable coil 1 as it is, turn the meter body M upside down as shown in FIG. The pivot bearing 4' is dropped into the bearing hole 6', and the pivot bearing 4' is adhesively fixed to the frame 5' with adhesive 8' in the same manner as described above.

In this case, the pivot bearing 4' is inserted into the bearing hole 4' and fixed with the adhesive 8' while leaving the inserted first gap gauge 7 as it is.
After falling inside, pull out the gauge 7, and then
Set value (e.g. 0.0.1
~0.02mm) with a thickness of g2.
Insert the gap gauge 7' between the moving coil 1 and the iron core 2, give a set gap between the pivot 3 and its bearing 4, and attach the pivot bearing 4' to the frame 5' with adhesive 8'. Fixed to.

Therefore, if the second gap gauge 7' is removed after the adhesive 8' has hardened, the pivots 3, 3' and the pivot bearings 4, 4' are removed.
The relative gap between the pivot bearings 4 and 4 can be easily determined based on the set value of the above-mentioned gauge difference, and the pivot bearings 4 and 4 can be easily determined without the need for the skill required for the conventional screw-fixed type.
′ can be fixed easily and quickly.

In the above, if the meter is small and has low accuracy and the influence of temperature changes can be ignored, the pivot bearings 4 and 4' can be simply moved from each other into the bearing holes 6 and 6' without using a gap gauge. You can also fix it with adhesive by simply dropping it in.

In this case, since the pivot bearing 4.4' is a very small component, the contact pressure with the pivots 3, 3' due to its own weight does not interfere with the driving of the moving coil, although it depends on the accuracy of the meter.

In the figure, 9 is a control spring and 10 is a pointer.

In the embodiment shown in FIG. 3, the pivot bearings 4, 4'
At the same time, the bearing holes 6 and 6' of the frame are slid into the bearing holes 6 and 6', and the bearings 4 and 4 are fixed to the frame with adhesive as in the previous embodiment.
' is a spring 1 whose elasticity is minimized using an appropriate jig.
1, 11', etc. and insert it in the same way.

7a is an auxiliary gauge for regulating the gap between the moving coil 1 and the iron core 2.

In this case, if the auxiliary gauge 7a is inserted and set only on one side, the spring pressure on the side where the gauge is inserted (11 side in the illustration) should be made slightly stronger than the spring pressure on the other side. Gap deviation in both the moving coil 1 and iron core 2 regions can be prevented.

The embodiment shown in FIG. 4 is a case in which the same screws 12 as in the conventional screw-in type are provided on the outer periphery of the pivot bearings 4, 4' that are inserted into the frames 5, 5'. 6' has a diameter that allows the screw 12 to be inserted loosely.

Therefore, according to this configuration, the adhesive is the pivot bearing 4.

4' and the bearing holes 6, 6', and the bonding of the two members by the adhesive can be performed even better.

Note that the screw 12 shown above may be provided on the side of the bearing holes 6, 6' and the outer periphery of the pivot bearings 4, 4' may be made smooth so that the structure is reversed to that shown in FIG. screw 12
This may be any suitable groove or recess other than a screw.

Furthermore, in the present invention, among the pivot bearings 4 and 4', which are arranged on opposite sides of the pivots 3 and 3', one of the pivot bearings is of the conventional screw-fixed type, and only the other pivot bearing is fixed with this type. It is also possible to adopt the drop-in adhesive fixing type of the invention, and in this case, the gist of the present invention can be obtained in the same manner as described above by making the pivot bearing to be assembled later into the drop-in type.

In addition, by combining a screw-fixed pivot bearing and a drop-in adhesive-fixed pivot bearing in this way, one screw-fixed pivot bearing can be adjusted, so that it can be adjusted after the meter is assembled. The movable coil can be conveniently handled when adjusting the pivot gap or repairing the meter later.

Therefore, with such a combination of pivot bearing configurations, it is easy to assemble the meter, and the need for adjusting the pivot gap during the assembly process can be omitted, and it is also possible to repair the meter after assembly. This has a great effect in manufacturing, etc.

In summary, according to the present invention, it is easy to assemble the pivot bearing, and it is also possible to omit the pivot gap adjustment by fixing the bearing, so that meter accuracy can be mass-produced without deterioration of meter accuracy due to rattling of the pivot. It also contributes to the automation of meter assembly, resulting in stable products without variations.

Note that the above-mentioned pivot bearing may be fixed by a suitable adhesive or adhesive paint, or by soldering, spot welding, or the like, if necessary.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and Fig. 1 is a cross-sectional explanatory view of the main part with one pivot bearing fixed oppositely to the other pivot side, and Fig. 2 is an inverted version of Fig. 1. Figure 3 is an explanatory diagram of another example where the other pivot bearing is slid in at the same time, Figure 4 is a diagram showing the pivot bearing. FIG. 7 is an explanatory diagram of another example showing a sliding relationship between the frame-side bearing hole and the frame-side bearing hole. In the figure, 3, 3'... Pivot, 4, 4'...
...Scarybot bearing, 5,5'...Frame,
6, 6'... Bearing hole, 8, 8'... Adhesive.

Claims (1)

[Claims] 1. Form a bearing hole large enough for the pivot bearing to fit into the frame to which the pivot bearing is installed, place the pivot below the bearing hole, and insert the pivot bearing into the pivot from above the bearing hole. Fixing of a pivot bearing characterized in that the pivot bearing is held in a bearing state and placed on the pivot only by its own weight, and the pivot bearing is fixed to the frame in this state with adhesive or welding means. Method.