JPH0529250B2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a tension-type meter movement.

(Prior Art) One of the methods of rotating the pointer of an electric meter is the tension method. This tension strap system is characterized in that the movable part to which the pointer is attached is rotatably suspended by the tension strap.

Figure 4 shows a conventional tension-type meter movement.

FIG. 4a shows an exploded view, and numeral 10 is a frame for holding magnets and the like, and is formed into a substantially U-shape. A bridge 12 is screwed to the open end side of the frame 10, and is made of a thin metal plate.
A through hole into which the holder is inserted is bored in the center. FIG. 4b is a front view of the bridge 12, and 13 is a through hole into which the holder is inserted.

14 is a small cylindrical magnet, and 15 is a movable part that is attached to hold the magnet 14. This movable part 15 is connected to the magnet 14
A coil 16 wound around a rectangular frame made of aluminum or the like that holds a It is composed of a tension band 19 that passes through it. Reference numeral 20 denotes a rotation shaft erected at the center of the upper boss 17 and the lower boss 18.

21a and 21b are connected to the movable part 1 by inserting the rotating shaft 20 when the movable part 15 is mounted on the frame.
These are an upper holder and a lower holder that rotatably support 5. The upper holder 21a and the lower holder 21b are supported by being press-fitted into through holes provided in the bridge 12 and the frame 10, respectively.

FIG. 4c shows the upper holder 21a and the lower holder 21.
A tension spring 22 made of elastic metal is fixed to the outer surfaces of the upper holder 21a and the lower holder 21b.

Further, a center hole 23 is transparently provided in the center of the upper holder 21a and the lower holder 21b, and the rotation shaft 20 of the movable part 15 is inserted into this center hole 23.

A through hole is formed in the rotation axis of the upper boss 17 and the lower boss 18 to allow the tension band 19 to pass through, and the tension band 19 is pulled out from the upper boss 17 and the lower boss 18.
It passes through a center hole 23 provided in the holder and is joined to the tension spring 22. and,
The movable part 15 is suspended by the tension of the tension band 19.

A projection 24 extends from the upper holder 20 and is used to rotate the upper boss 17 for zero point adjustment.

A yoke 25 is fitted onto the frame 10 and fixed with screws, and is constructed by laminating metal plates. FIG. 4d is a front view of the yoke 25.

Since the movable part suspended by the tension band is rotated by the current flowing through the coil due to the above-described configuration, a predetermined measurement can be performed using this.

(Problems to be Solved by the Invention) However, as mentioned above, the conventional meter movement is composed of various small parts, and there is a problem that the number of parts is large and the assembly process is complicated. . In addition, balance adjustment is required to enable accurate measurement, and delicate adjustments must be made.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and its purpose is to provide a meter movement that can reduce the number of parts and allow efficient assembly work.

(Means for Solving the Problems) In order to solve the above problems, the present invention includes the following configuration.

That is, it consists of a movable part with upper and lower tension bands, and a frame in which this movable part, upper and lower tension springs, upper and lower holders, and a bridge are combined, and the frame passes through a center hole provided in the upper and lower holders. In a tension band type meter movement in which upper and lower tension bands extending from a movable part are fixed to upper and lower tension springs joined to a holder to suspend the movable part, the bridge and frame are formed in a square shape. A groove is formed in the center of the upper connecting part and the lower connecting part of the integrally molded frame to allow the rotating shaft of the movable part to be loosely inserted from the side of the frame in order to rotatably mount the movable part. The present invention is characterized in that a notch is provided from a side edge of the holder to the center hole in order to guide and introduce the tension band into the center hole of the holder.

(Example) Hereinafter, preferred embodiments of the present invention will be described in detail based on the accompanying drawings.

FIG. 1 shows an embodiment according to the present invention, and FIGS. 1a, b, and c are a front view, a top view, and a rear view of a methammement, respectively.

In the figures, the same members as those in the conventional example, such as movable parts, are given the same numbers and their explanations will be omitted.

In FIG. 1B, numeral 30 denotes a frame in which a bridge and a frame, which have conventionally been formed separately, are integrally formed, and are integrally molded in a substantially square shape from synthetic resin or the like. A magnet holder 31 slightly protrudes from the inner surface of the frame 30, and engages with the outer peripheral surface of the magnet 14 and the irregularities to lock the magnet 14 to the frame 30. 32 is a claw for positioning the magnet 14 at the center of the frame 30. This claw 32 protrudes from the inner surface of the frame portion of the frame 30 and connects the magnet 14 to the frame 30.
When inserted into the magnet 14, it comes into contact with the side surface of the magnet 14.

A yoke 33 is formed into a cylindrical shape, and is fitted and fixed to the frame 30 so as to cover the outer peripheral surface of the magnet 14.

34 and 35 are an upper holder and a lower holder that support the upper boss 17 and lower boss 18 of the movable part 15, and a holder support part 36 provided on the frame 30.
a, 36b, the shaft portions of the upper boss 17 and lower boss 18 of the movable portion 15 are inserted.

FIG. 2a is a front view of the frame 30,
36a is a holder support portion into which the holder is inserted. This holder support part 36a has a frame 30
In order to fit the magnet 14 and movable part 15 together by dropping them from above, there is a U extending from the top surface of the frame 30 to approximately the center of the frame.
A groove 37 is formed. The movable part 15 is attached to the frame 3
0, the upper boss 17 of the movable part 15
The shaft portion of the lower boss 18 is located within this U groove.

Holder support parts 36a and 36b integrally formed with the frame 30 protrude from the frame 30 in a circular shape, and their peripheral edges are formed into projecting edges.
Further, the engaging portions of the upper holder 34 and the lower holder 35 with the holder supporting portions 36a, 36b are formed so as to fit onto the holder supporting portions 36a, 36b, and the projecting edges of the holder supporting portions 36a, 36b A recess is formed to engage with. By forming the upper holder 34 and the lower holder 35 from an elastic material, the holder support portion 36 can be easily attached to the upper holder 34 and the lower holder 35.
a, 36b.

FIG. 2b shows the upper holder 34 and the lower holder 3.
5 is a front view of the upper holder 34 as shown in the figure.
A notch 38 is cut from the side edge of the circumferential surface of the lower holder 35 to the center hole 23 provided through the center of the upper holder 34 and the lower holder 35.

Next, a method of assembling the movement of the embodiment having the above configuration will be explained with reference to the exploded view shown in FIG. 3.

When assembling the meter movement, first, the movable part 15 is inserted onto the outer peripheral surface of the magnet 14, and then pushed into the frame 30 from above. Since the frame 30 has some elasticity, the magnet 14
can be easily inserted into the frame 30,
A magnetic holder 31 is placed between the claws 32.
1 and the circumferential surface of the magnet 14 are engaged with each other in an uneven manner and are fixed.

At this time, the shaft portions of the upper boss 17 and lower boss 18 of the movable portion 15 that are fitted onto the magnet 14 are connected to the U grooves 37 of the holder support portions 36a and 36b of the frame 30.
supported within.

Next, the upper holder 34 and the lower holder 35 are press-fitted into the holder support parts 36a and 36b and fixed. At that time, the shaft parts of the upper boss 17 and lower boss 18 of the movable part 15 are connected to the upper holder 34 and the lower holder 35.
It is loosely inserted into the center hole 23 provided transparently in the
The movable part 15 is rotatably supported.

The upper holder 34 and the lower holder 35 have a notch 3.
8a and 38b, the upper boss 17
and a tension band 19 protruding from the shaft end of the lower boss 18
can be easily guided into the center hole 23 by being guided by the notches 38a and 38b. Further, the notches 38a and 38b are sufficiently narrower than the diameter of the center hole 23, and do not affect the rotation of the movable portion 15 in any way.

Next, the two tension bands 19 protruding from the center hole 23 are movable by being soldered to the tension springs 22 fixed to the upper holder 34 and the lower holder 35 while applying a predetermined tension in opposite directions to each other. The section 15 is suspended.

Finally, extrapolate the yoke 33 to the frame 30,
Covers the circumferential surface of the magnet 14. At this time, since the frame 30 has some elasticity, the yoke 33 can be easily fitted onto the outside.

As described above, according to the configuration of the meter movement according to the present invention, since the frame is configured as an integral structure,
There is no need to screw the bridge, and since the yoke is fitted onto the frame, there is no need to screw the yoke to the frame. Furthermore, since the holder is provided with a notch, handling of the tensioning belt becomes simple, and mounting of the movable part on the frame can be simplified.

(Effects of the Invention) According to the present invention, as described above, since the frame supporting the movable part is configured as an integral structure, there is no need to screw the bridge, and each part can be fitted into the frame. The movement can be assembled easily because it can be assembled with the In addition, by providing a notch in the holder, the tension band can be easily penetrated into the holder.
As a result, the movement assembly work can be greatly simplified compared to the conventional method.

Although the present invention has been variously explained above with reference to preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. It is.

[Brief explanation of the drawing]

Figures 1a, b, and c are front views showing an embodiment of a tension-type meter movement according to the present invention, respectively;
Plan view, rear view, 2nd figure a and b are front views showing the frame and holder, respectively, 3rd figure is an exploded view, 4th figure is a front view showing the frame and holder, respectively.
The figure is an exploded view showing a conventional tension-type meter movement. 10...Frame, 12...Bridge, 13...
...Through hole, 14...Magnet, 15...Movable part,
16...Coil, 17...Upper boss, 18...Lower boss, 19...Tension band, 20...Rotation axis, 21a...
Upper holder, 21b... Lower holder, 22... Tension spring, 23... Center hole, 24...
Small arm, 25...Yoke, 30...Frame,
31...Magnetic holder, 32...Claw, 33...
... Yoke, 34 ... Upper holder, 35 ... Lower holder, 36a, 36b ... Holder support part, 37 ...
U groove, 38a, 38b...notch.

[Claims]

1. A movable part with upper and lower tension bands, a bridge and frame that support this movable part, and upper and lower tension springs that suspend the movable part by fixing the ends of the upper and lower tension bands extending from the movable part. In the tension band type meter movement, the bridge and frame are integrally molded in a square shape, and the movable part is rotatably mounted in the integrally molded frame. A groove is formed in the center of the upper connecting part and the lower connecting part for loosely inserting the rotating shaft of the movable part from the side of the frame, and the upper connecting part of the integrally formed frame is configured to suspend the movable part by a tension band. and a tension-type meter movement characterized by having a tension spring installed directly in the center of the lower connecting part.