JPH0127103Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] This invention relates to a moving coil type indicating instrument in which a moving coil is rotatably suspended by a pair of tension straps.
More specifically, the present invention relates to a structure for attaching a moving coil opening to a tension support plate.

[Technical background of the invention] Generally, in this type of indicating instrument, the mouth wire of the moving coil is connected to a tension support plate, and the current to be measured is caused to flow through the moving coil through the tension support plate and the tension support plate. ing. In that case, conventionally, as illustrated in FIG. 3, the mouth wire 3 of the moving coil is twisted several times around the protruding piece 2 formed on the support plate 1 and then soldered. Since the opening wire 3 is extremely thin, it is difficult to handle and may break during the tying operation. Furthermore, it is difficult to automate this karage work.

[Purpose of the invention] This invention was devised in view of the above-mentioned drawbacks of the conventional method.The purpose of this invention is to easily and reliably attach the mouth wire of the moving coil to the tension support plate without causing wire breakage. An object of the present invention is to provide a moving coil type indicating instrument that enables the following.

[Example] Hereinafter, this invention will be explained in detail with reference to the example shown in FIGS. 1 and 2.

This indicator includes a movable coil 11 rotatably suspended around a cylindrical magnet (not shown) by a tension band 10. Although only the upper half of the movable coil 11 is shown in FIG. 1, the lower half is also supported by a tension band similar to that described above. This movable coil 11 has the tension band 10
A support plate 12 for mounting the holder is fixed via a seat plate 13 made of an electrically insulating material such as synthetic resin. The support plate 12 is made of a conductive material such as aluminum, and is provided with, for example, three balance arms 14 and a connecting arm 15 for attaching a pointer (not shown), as well as a protrusion as a terminal pin. A piece 16 is provided protrudingly, and the opening line 11 of the moving coil 11 is attached to this protruding piece 16
A can be installed.

According to this invention, a fixing plate 18 having a clamping piece 17 for clamping the mouth wire 11a between the fixed plate 18 and the protruding piece 16 is provided on the support plate 12. The fixing plate 18 is made of a conductive material such as brass, and the holding piece 17 is bent slightly upward so as to intersect the projecting piece 16 at a predetermined angle, as shown in FIG. Preferably, their clamping surfaces are coated with solder in advance.

Therefore, according to this configuration, the mouth wire 11a is inserted between the projecting piece 16 and the clamping piece 17, and the clamping piece 1
After bending the end of 7 downward and temporarily fixing the opening line 11a, the opening line 11a is machined between the projecting piece 16 and the clamping piece 17 by heating with an appropriate heating means to melt the solder. connection can be made reliably both physically and electrically. In addition, as a heating means, a soldering iron, resistance welding, hot air blowing, infrared rays, an electron beam, a laser beam, etc. can be applied.

Further, in this embodiment, a cutout groove 19 is formed in the fixed plate 18 for guiding one end of the tension band 10 onto the rotating shaft of the movable coil 11, and the fixed plate 18 is mounted on the support plate 12. When placed, one end of the tension band 10 is clamped and fixed between them.
Reference numeral 20 is a positioning pin provided upright on the seat plate 13, and each of the support plate 12 and the fixed plate 18 has a positioning hole into which the pin 20 is fitted. 21 are perforated in each case.

[Effects] As is clear from the above description of the embodiment, according to this invention, the opening wire 11a is inserted between the projecting piece 16 and the clamping piece 17, and the clamping piece 17 is lightly caulked, which is an extremely simple operation. Accordingly, the opening wire 11a can be reliably attached to the support plate 12 without causing wire breakage, etc., and productivity can be improved and this work can also be automated.

In the above embodiment, the side of the holding piece 17 is bent at a predetermined angle in advance;
7 is kept flat, and the protruding piece 16 is
The sides may be bent in advance at a predetermined angle, and the protruding piece 16 side may be caulked.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of one embodiment of this invention, FIG. 2 is an enlarged cross-sectional view of the main part thereof, and FIG. 3 is a perspective view showing an example of a conventional example of opening line attachment. In the figure, 10 is a tension band, 11 is a moving coil, 11a
12 is a support plate, 13 is a seat plate, 16 is a projecting piece, 17 is a clamping piece, and 18 is a fixing plate.

Claims (1)

[Claims for Utility Model Registration] 1. A movable coil, a support plate attached to each of the upper and lower sides of the movable coil via an electrically insulating seat plate, and a rotatable suspension of the movable coil via the support plate. A moving coil type indicating instrument including a pair of tension bands holding the movable coil and having a mouth line of the moving coil electrically connected to a predetermined protrusion formed on the base plate; The movable coil type indicator is characterized in that a fixed plate having a clamping piece for clamping the mouth wire between the protruding piece and the protruding piece is provided. 2. The moving coil type indicating instrument according to claim 1, wherein one end of the tension band is fixed between the fixed plate and the support plate.