JPH0529251B2 - - 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 band system is characterized in that the movable part to which the pointer is attached is rotatably suspended by the tension band.

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.
The upper holder and the lower holder 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 metering member is composed of various small parts, and has the problem that the number of parts is large and the assembly process is complicated. be. 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, a movable part having upper and lower tension bands, a bridge and frame that support this movable part, and upper and lower tensions that suspend the movable part by fixing the ends of the upper and lower tension bands extending from the movable part. In a tension band type meter movement having a spring, the bridge and frame are integrally molded in a square shape,
In order to rotatably install the movable part in the integrally molded frame, the rotation shaft of the movable part is loosely inserted into the center of the upper connecting part and the lower connecting part of the square-shaped frame from the side of the frame. It is characterized in that a groove is formed and a tension spring is provided directly at the center of the upper connecting part and the lower connecting part of the integrally formed frame to suspend the movable part by a tension band.

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

FIG. 1 shows one embodiment of the present invention, and FIGS. 1a, b, and c are a front view, a top view, and a rear view of a meter movement, 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. Reference numeral 31 denotes a magnet holder that slightly protrudes from the inner surface of the frame 30, and engages with the outer circumferential surface of the magnet 14 and the irregularities to secure the magnet 14.
is locked to the frame 30. 32 is frame 30
This is a claw for positioning the magnet 14 at the center of the magnet. 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.

Reference numeral 34 denotes an upper tension spring provided at the center of the upper connecting portion of the frame 30. Further, 36 is a lower tension spring provided at the center of the lower connecting portion of the frame 30.

Next, the structure of the frame 30, the upper tension spring 34, and the lower tension spring 36 will be explained in more detail with reference to FIG. 2, which is an exploded view of this embodiment.

In FIG. 2a, 38a and 38b are an upper tension spring support portion and a lower tension spring support portion, respectively, which extend from the frame 30 in the shape of a circular collar.

FIG. 2 shows a front view of the frame 30,
A loose insertion hole 40 is formed in the center of the upper tension spring support part 38a and the lower tension spring support part 38b, into which the rotation shaft 20 extending from the movable part 15 is loosely inserted. A notch 41 communicating with the loose insertion hole 40 is bored from the periphery. This notch 41 connects the movable part 15 to the frame 3.
This is for press-fitting the rotary shaft 20 into the loose insertion hole 40 when inserting the rotary shaft 20 into the hole 40, and the cut width is formed to be narrower than the diameter of the rotary shaft 20.

FIG. 2c shows a front view of the upper tension spring 34 and the lower tension spring 36.

Both the upper tension spring 34 and the lower tension spring 36 are formed from thin plates such as metal having elasticity and conductivity, and are joined to the projecting edges of the upper tension spring support portion 38a and the lower tension spring support portion 38b. A hole is formed in the center of this circular part to pass the tension band, and a protrusion 43 for soldering and fixing the tension band protrudes toward the center of this hole. do.

Further, an upper tension spring 34 and a lower tension spring 36 are provided at the periphery of the circular portion.
Crimping claws 44a and 44b are formed for attaching the tension springs to the upper tension spring support portion 38a and the lower tension spring support portion 38b, respectively. The crimp claws 44a and 44b are bent so as to elastically clamp the projecting edges of the upper tension spring support portion 38a and the lower tension spring support portion 38b, and are bent to elastically press the protruding edges of the upper tension spring support portion 38a and the lower tension spring support portion 38b. 36 is attached to the upper tension spring support part 38a and the lower tension spring support part 38b.

In FIG. 2c, reference numeral 45 denotes a groove extending from the side edges of the upper tension spring 34 and the lower tension spring 36 toward the protrusion 43.

Further, the upper tension spring 34 is formed with a small arm 42 extending outward from the circular portion. This small arm 42 is used to rotationally adjust the movable portion 15 for adjusting the zero point of the pointer.

In FIG. 2a, 33 is a ring-shaped yoke, which is fitted onto the frame 30 and fixed so as to cover the magnet 14.

When assembling the meter movement of this embodiment, first, the movable part 15 is fitted onto the magnet 14, and then inserted into the frame 30 from the side. Since the frame 30 has some elasticity, the rotation shaft 20 of the movable part 15 can be easily inserted into the loose insertion hole 40 by widening the notch 41 slightly.

Next, a tension band 19 extending vertically from the movable part 15
are soldered to the protrusions 43 of the upper tension spring 34 and the lower tension spring 36 while applying the required tension in opposite directions to suspend the movable part 15. At this time, the tension band 19 is connected to the upper tension spring 34 and the lower tension spring 36.
Since the tension band 19 can be pulled out to the protrusion 43 through the cut groove 45 provided in the tension band 19, handling of the tension band 19 is easy.

Finally, the yoke 33 is fitted onto the frame 30 and fixed. Since the frame 30 has some elasticity, the yoke 33 is easily fitted onto the frame 30.

Since the upper tension spring 34 is clamped by the tension spring support portion 38a by bending the crimp claw 44a, it can be rotated to any position, and the movable portion is rotated to adjust the zero point of the pointer. be able to.

FIG. 3 is an exploded view showing another embodiment of the meter movement.

This embodiment is different from the embodiment described above in that it does not have the cut groove 45 formed in the upper tension spring 34 and the lower tension spring 36 that extends from the side edge of the tension spring toward the protrusion 43. This is a different point. That is, Fig. 3c
is the upper tension spring 46 in this embodiment.
1 and 2, which is a front view of the lower tension spring 47. As shown in the figure, the upper tension spring 46 and the lower tension spring 47 are provided with an insertion hole 48 through which the tension band 19 passes.

Since the other members of this embodiment are the same as those of the above-mentioned embodiment, the same numbers are given to the same members of the above-mentioned embodiment, and the explanation thereof will be omitted.

The method of assembling the meter movement of this embodiment is almost the same as that of the above-mentioned embodiment, but in this embodiment, the tension band 19 extending from the movable part 15 is connected to the upper tension spring 46 and the lower tension spring. When attaching to the protrusion 43 of 47, it is necessary to pull out the tension band 19 so as to pass it through the insertion hole 48.

As described above, the meter movement of this embodiment has a much simpler structure and easier assembly than the conventional meter movement, and the functions and effects of the meter movement are also similar to those of the above-described embodiments.

(Effects of the Invention) According to the present invention, as described above, since the frame supporting the movable part is integrally constructed and the tension spring is attached directly to the integrally constructed frame, there is no need to assemble the frame with screws. Moreover, by reducing the number of parts, the structure can be made simpler, and as a result, the efficiency of assembly work can be improved and costs can be further reduced.

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, plan, and rear views of a tension-type meter movement showing one embodiment of the present invention, Figure 2a is an exploded view, and Figure 2b is a frame. Figure 2c is a front view of the tension spring, Figures 3a, b, and c are exploded views showing other embodiments, a front view of the frame, a front view of the tension spring, Figure 4 1 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 tension spring, 3
6... Lower tension spring, 38a... Upper tension spring support part, 38b... Lower tension spring support part, 40... Loose insertion hole, 41...
...Notch, 42...Small arm, 43...Protrusion, 44
a, 44b...Crimping claw, 45...Cutting groove, 46...
Upper tension spring, 47...lower tension spring, 48...insertion hole.

[Claims]

1. In a boss of a tension band type meter movement in which a rotation shaft with a center hole penetrating through the tension band is set upright on a boss stand, from the outer edge of the boss stand in order to guide the tension band into the center hole. A boss of a tension-type meter movement, characterized in that a notch is provided that communicates with the center hole of the rotation shaft.