JPS5914727Y2 - Installation structure of zero adjustment member in electromagnetic instrument - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in the mounting structure of a zero adjustment member in an electromagnetic instrument.

As shown in FIGS. 1 and 2, a conventional general mounting structure for a zero adjustment member is such that a disc-shaped zero adjustment member 1 having a dish shape and having spring properties is attached to a columnar stepped member 2. Since the zero adjustment member 1 is semi-fixed to the bearing member 3 by fitting the cylindrical stepped screw member 2 to the bearing member 3 after fitting the zero adjustment member 1 to the bearing member 3, it has the following drawbacks. Ta.

That is, in this mounting structure, at least three members are laminated, which is not preferable for small instruments with limited height dimensions, and because the number of parts is relatively large, it is disadvantageous in terms of cost.

In addition, in the case of this mounting structure, the rotational torque of the zero adjustment member 2 was set by adjusting the depth of fitting of the cylindrical stepped screw member 2 into the bearing member 3. It is extremely difficult to adjust the force applied to a tool such as a punch used when fitting the stepped member 2 to the bearing member 3, so there is a drawback that skill is required.

The present invention aims to provide a mounting structure for a zero adjustment member that eliminates the above-mentioned drawbacks, and one embodiment thereof will be described with reference to FIGS. 3 and 4.

11 is cut out from a thin metal plate and has a fitting hole 11 in the center.
A also has a pair of fitting notches 11b and ll on the outer periphery.
A disc-shaped zero adjustment member is provided with a notch 11 C for zero adjustment, a lead terminal 11 C that also serves as a stopper, and 12 is cut out of a hard resin material or metal material and has a cutout 11 C for the zero adjustment, and 12 is cut out from a hard resin material or metal material and has a notch 11 C for the zero adjustment, and a lead terminal 11 d that also serves as a stopper. Torque setting stepped portion 12a with a larger diameter than hole 11a
The cylindrical support part 12a has a cylindrical support part 12a which has a cylindrical shape and can be fitted into the fitting hole 11a.
The bearing member is provided with a pair of shoulders 12b, 12b having a pair of shoulders 12b, 12b, and the fitting hole 11a of the zero adjustment member 11 is fitted with fitting notches 11b, 11b as shown by solid lines in FIG.
After fitting it into the cylindrical support part 12a while aligning the shoulders 12b and 12b, the entire zero adjustment member 11 is rotated counterclockwise in FIG. Then, as shown by the chain line, the outer periphery is made into horizontal groove 1.
1b and 11b and release the push down, the zero adjustment member 1
1 is semi-fixed to the bearing member 12 by its own spring pressure.

If the lead terminal 11d is then bent downward as shown by the chain line in FIG. 3, this lead terminal 11d will act as a stopper when the zero adjustment member 11 attempts to rotate clockwise in FIG. However, as a result, the zero adjustment member 11 does not easily come off from the bearing member 11.

The rotational torque of the zero adjustment member 11 is set by changing the height of the torque setting step 12a' and changing the spring pressure of the zero adjustment member 11 itself.

As described above, the zero adjustment member mounting structure according to the present invention reduces the number of laminated members, and is therefore extremely suitable for small instruments with limited height dimensions.

Furthermore, since the number of parts is reduced, it is possible to reduce the cost of the meter.

Furthermore, since the rotational torque of the zero adjustment member can be set simply by changing the height of the torque measuring step provided on the bearing member, there is no need for skill as in conventional methods, and it is easier to mass produce and manufacture instruments. Extremely useful for cost reduction.

[Brief explanation of drawings]

Fig. 1 is a plan view showing the mounting structure of the zero adjustment member in a conventional electromagnetic meter, Fig. 2 is a cross-sectional view taken along the line II-II in Fig. 1, and Fig. 3 is a diagram showing the installation structure of the zero adjustment member in the electromagnetic meter according to the present invention. A plan view showing an example of the mounting structure, FIG. 4 is a plan view showing an example of the mounting structure.
FIG. 3 is a cross-sectional view taken along line IV. 11... Zero adjustment member, 11 a... Fitting hole, 11
b... Notch for fitting, 11 C... Notch for zero adjustment, 11 d... Lead terminal, 12... Bearing member,
12a...Cylindrical support part, 12a'...Torque setting step part, 12b...Shoulder part, 12b'...Horizontal groove.

Claims (1)

[Scope of utility model registration request] The center hole of the disc-shaped zero adjustment member is fitted into a cylindrical support part provided in the center of the bearing member and having a stepped portion with a larger diameter than the center hole, and the outer peripheral part of the zero adjustment member is fitted. A mounting structure for a zero adjustment member in an electromagnetic instrument, in which the zero adjustment member is semi-fixed to the bearing member by fitting into a pair of lateral grooves provided on both shoulders of the bearing member and lower than the stepped portions. .