JPS6241248Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tension band-type instrument, and particularly improves the means for fixing the tension band on the movable part side.

FIG. 1 is a configuration diagram of a movable part of a conventional tension-type meter. In the figure, 10 is the boss, and slot 1
1 and 12 are formed on the shafts 13 and 14 on the upper and lower sides. The shafts 13, 14 are provided with pins 15, 16 that cross the slots 11, 12. 21 is a pointer, 22 is a moving coil, and these are attached to the boss 10. 31 and 32 are upper and lower tension belts,
41 and 42 are aluminum wedges (taper pins), the tension band 31 passes through a hole formed by the slot 11 and the pin 15, and the end thereof is soldered to the chip 23. After soldering, a wedge 41 is driven into the hole formed by the slot 11 and the pin 15 to fix one end side (movable part side) of the tension band 31. Similarly, the tension band 32 passes through a hole formed by the slot 12 and the pin 16 and is soldered to the chip 24, and then a wedge 42 is driven in and fixed. 51,
52 are the upper and lower tension springs, tension belt 3
1 is the tongue piece 53 of the tension spring 51
The other end of the tension band 32 is soldered to the tongue piece 54 of the tension spring 52.

In a tension band-type instrument having a movable part with such a configuration, the effective length of the tension bands 31 and 32 (the length of the tension band contributing to the control torque) is l, but in order to keep the effective length unchanged, The starting point of the movable part is the wedge 41,
It is designed to be fixed at 42. However, such an instrument requires separate parts called wedges 41 and 42, and these wedges are extremely small, and it is difficult to drive them into the also extremely small hole formed by a slotted pin. This required work using tweezers, which was troublesome. In addition, it was extremely difficult to automate the production of instruments due to the work involved in driving the wedges. The present invention has been made to eliminate such drawbacks.

FIG. 2 is a perspective view showing one embodiment of the strap-type meter of the present invention, in which 1 is a cover made of transparent plastic with diagonally cut corners, and 2 is a black plastic base. Cover 1 is attached to base 2 by snap fittings. The inner device of the meter is arranged within a case formed by a cover 1 and a base 2. A top view and a side view of the inner device are shown in FIGS. 3A and 3B. In both figures, 100 is an excitation part, 200 is a bridge part, and 300 is a movable part. Hereinafter, each part will be explained in detail using FIG. 4 showing an exploded perspective view of the internal device.

Regarding the excitation section 100.

The excitation unit 100 includes a plate-shaped yoke 110, a semicircular core 120, and a pair of permanent magnets 130, 14.
It consists of 0. A circular hole 112 is formed in the yoke 110 through a triangular notch 111 . Permanent magnets 130 and 140 are yoke 1
10 dotted line positions 130' and 140',
A core 120 is attached onto the magnet by adhesive.

About the bridge department.

The bridge portion 200 consists of a bridge 210, upper and lower boss stops 220 and 230 made of an insulating material such as plastic, and upper and lower tension springs 240 and 250 made of a spring material. A circular hole 211 is formed in the center of the bridge 210, and this hole communicates with the outside through a notch 212. The bridge 210 is U-shaped, and its legs 213 and 214 are inserted into holes 113 and 114 formed in the yoke and caulked, thereby attaching the bridge to the yoke 110. The boss stopper 220 is fan-shaped, and as shown in FIG. Notches 224 are formed at intervals. The cylindrical portion 223 communicates with the outside of the boss stopper via a notch 225 formed in the axial direction. The boss stopper 220 connects the large diameter portion 221 to the bridge 21.
It is attached to this bridge by press-fitting it into the hole 211 of 0 from above. Lower boss stopper 23
0 also has the same configuration as the boss stopper 220, and its large diameter portion 231 is connected to the hole 112 of the yoke 110.
It is attached to this yoke by press-fitting it from the back side.

The tension spring 240 is made of a spring material and has a tongue piece 241 at its center. This tension spring is attached to the boss stopper 220 by ultrasonic welding means so that the tongue bent portion 242 is located on the cylindrical portion 223 of the boss stopper 220. Lower tension spring 2
50 has exactly the same structure as the upper tension spring 240, and this lower tension spring is attached to the lower boss stopper 230.

The movable part 300 includes a pointer 310 and a pointer attachment member 32
0, moving coil 330, terminal member 340, holding member 350, upper tip 360 and lower tip 37
0, and a tension band 380. The pointer attachment member 320 has a semi-cylindrical member 321 made of synthetic resin as its base, and on this base,
Semicircular recesses 322 and 323 are formed at the bottom, and a recess 324 is formed at the center of the cut surface. There are arms 325, 3 extending parallel to the cut surface.
26 is formed, and a pointer attachment portion 327 to which the pointer 310 is attached and an attachment portion 329 to which the balance arm 328 is attached are integrally formed in the direction perpendicular to the cut surface. Projections 324' and 324'' are integrally formed on the upper and lower parts of the recess 324, and through holes 32 are formed on the arms 325 and 326.
5', 326' are formed. Moving coil 33
0, 331 is a coil frame made of aluminum material, and protrusions 332 and 333 are integrally formed on this coil frame. The terminal member 340 is made of a synthetic resin material, and a pair of terminals 341 and 342 are attached diagonally thereto. The coil frame 331 is carried on the trunk 343 of this terminal member, and the protruding parts 332, 333 of this coil frame
This coil frame is attached to the terminal member 340 by bending it inward as shown by the chain line. As shown in FIG. 6, a coil 344 is wound around the coil frame 331 attached to the terminal member 340 from above the terminal member 340 as shown in FIG. Both ends of the coil 344 are wound around terminals 341 and 342.

The holding member 350 is a rectangular parallelepiped made of synthetic resin, and has semicircular recesses 352 on the top and bottom of one longitudinal end surface 351 (a top view of this holding member 350 is shown in FIG. 7). 353 is formed. In addition, an arm 35 extending parallel to the one end portion 351
4, 355 are integrally formed with protrusions 356, 357. The chip 360 is made of a cross-shaped conductive material plate, and one arm 361 is bent downward, and one arm 362 perpendicular to this is bent in the opposite direction. The lower chip 370 is of the same construction as the upper chip 360. Chip 36
0, the bent portion 361 is the end surface 3 of the holding member 350.
It is attached to the upper surface of the holding member 350 by ultrasonic welding means so as to be located at 51 (see FIG. 7). The tip 370 also has its bent portion 371 at the end surface 351 of the holding member 350, so that the tip 36
The holding member 350 is attached to the lower surface of the holding member 350 so as to face the bent portion 361 of the holding member 350 with a gap therebetween. FIG. 8 shows a front view of the end face 351 portion of the holding member 350 with the upper and lower chips 360, 370 attached thereto. The terminal member 340 to which the coil frame 331 is attached and the coil 344 is wound is connected to one terminal 34 of the terminal member 340.
1 is a chip 360 attached to the holding member 350
and the terminal 34 so as to contact the bent portion 362 of the
2 is attached to the other surface 358 of the holding member 380 so as to contact the bent portion 372 of the chip 370.
Then, the terminal 341 is soldered to the bent portion 362, and the terminal 342 is soldered to the bent portion 372.
A top view of the holding member 350 in this state is shown in FIG. One end of the tension band 380 is connected to the notch 212 of the bridge 210 and the notch 225 of the boss stopper 220.
are inserted into the holes 211 and 223 of the bridge 210 and upper boss stopper 220, respectively, and the tip thereof is inserted into the bent portion 2 of the tension spring 240.
42 and then soldered to the tongue piece 241.
The other band of the tension band 380 is the notch 111 of the yoke 110.
and the notch 235 of the boss stopper 230, respectively, and are inserted into the hole 112 of the yoke 110 and the hole 233 of the lower boss stopper 230, and the tip thereof is soldered to the tongue piece 251 of the lower tension spring 250. In this case, the tension band 380 is attached with a predetermined tension between the upper and lower tension springs 240 and 250.

A member in which the movable coil 330, the terminal member 340, and the holding member 350 are combined is combined with the above-mentioned pointer attachment member 320 to constitute the movable part 300. The connection is made as follows. That is, the bent portion 361 of the tip 360 attached to one end surface 351 of the holding member 350 and the bent portion 371 of the tip 370 are connected to the upper and lower tension springs 24.
The holding member 350 is positioned so as to contact the tension band 380 that is pre-tensioned between 0.0 and 250, and the first
As shown in the enlarged view of Figure 0, chips 360 and 370
Tension straps 380 are soldered to the bent portions 361 and 371 of. After soldering, the tension band 380 between the bent portions 361 and 371 is separated. Thereafter, as shown in FIG. 10, the pointer attachment member 320 is placed opposite the holding member 350, and the upper and lower tension bands 380 and 380' soldered to the tips 360 and 370 are attached to the 11th
As shown in the figure, while squeezing with the protrusions 342' and 342'' formed in the recess 324 of the pointer attachment member 320,
Also, the chips 360 and 370 are connected to the projections 342',
342″ while causing plastic deformation to the tension band 38
0,380' between the pointer mounting member 320 and the holding member 3
The pointer mounting member 32 is inserted between both sides of the pointer mounting member 32.
0 into the holding member 350. When pushed in, the protrusions 356, 357 of the holding member 350 are inserted into the holes 325', 326' provided in the arms 325, 326 of the pointer attachment member 320, and by ultrasonically welding the inserted portions, both members are bonded. joined together. Then, the pointer attachment part 3 of the pointer attachment member 320
By attaching the pointer 310 to 27, the movable part 3
00 is assembled. FIG. 12 shows a top view of the assembled movable part. Further, FIG. 13 shows an enlarged sectional view of the section BB' in FIG. 12.

The manufacturing order of a meter made of each of these components is as follows.

The bridge 210 is attached to the yoke 100, and the permanent magnets 130 and 140 are attached to the yoke 110.
Attach by gluing at positions 130' and 140'.

The upper tension spring 240 is attached to the upper boss stopper 220, and the large diameter portion 221 of the boss stopper 220 is attached to the bridge 210.
Press fit into the hole 211. Similarly, the lower tension spring 250 is attached to the lower boss stopper 230, and the large diameter portion 231 of the boss stopper 230 is press-fitted into the hole 112 from the back side of the yoke 110.

Upper and lower tension springs 240, 25
The tension band 380 is stretched at a predetermined tension between 0 and 0.

A coil 344 is wound around a movable coil 330 to which a terminal member 340 is attached, and the ends of the coil are wound around terminals 341 and 342.

Upper and lower chips 360, 3 are attached to the holding member 350.
Install 70.

The terminal member 340 is coupled to the holding member 350, and the terminals 341, 342 are attached to the chips 360, 37.
Solder to 0.

Bent parts 361, 37 of chips 360, 370
1, solder the tension band 380 to the bent part 361, 3.
Cut the tension between 71.

A cross section of the pointer attachment member 320 is joined to one end surface 351 of the holding member 350, and both members are joined by ultrasonic welding.

The core 120 is inserted into the movable coil frame 331, and both ends of the core are connected to the permanent magnets 130, 140.
Glue on top.

The pointer 310 is attached to the pointer attachment portion 327 of the pointer attachment member 320 by adhesive.

The internal components of the instrument assembled in this order are shown in A and B in Figure 3, and the internal components are housed in a case consisting of the cover 1 and base 2 shown in Figure 1. . However, input terminal 3 (second
When the input to be measured is given from the tension spring 240 → the upper part of the tension band 380 → the coil 334 → the lower part 38 of the tension band 380
0' → reaches the terminal 4 via the tension spring 250, and the movable part 300 rotates around the tension bands 380, 380' according to the magnitude of the input to be measured.
Pointer 310 indicates the value of the input to be measured.

In such an instrument, tension bands 380, 38
The effective length of 0' is indicated by l in FIG.
In this case, the starting points of the effective lengths 1 on the side of the tensioning parts 380 and 380' are determined by the protrusions 324' and 324' that are integrally molded on the pointer attachment member 320, so that Like, Kusabi 41,
Not only does a separate member such as 42 become unnecessary, but also the troublesome work of driving a wedge becomes unnecessary. Also,
Since there is no need to drive in wedges, automatic assembly of the instrument is easy.

In this way, when fixing the tension bands 380, 380' by sandwiching the pointer attachment member 320 and the holding member 350, the problem is that the dimension A shown in FIG.
This is due to the variation in the tightening allowance due to the variation in dimension B. If this becomes too large, there is a risk that parts C and C' will be destroyed, but in the instrument of this invention, the interference allowance is taken for the entire part C and C'. Instead, small protrusions 324' and 324'' are provided to prevent excessive stress from being generated due to plastic deformation of these parts, so there is no risk of breakage.

As explained above, according to the present invention, it is possible to obtain a tension-type instrument with a simple structure, in which the fixing means on the movable part side of the tension tensioner is improved.

[Brief explanation of the drawing]

Figure 1 is a configuration diagram of the main parts of a conventional tension-type meter, Figure 2 is a perspective view of an embodiment of the tension-type meter according to the present invention, and Figure 3 is a configuration diagram of the internal device, which is Figure A. FIG. 4 is a top view, B is a side view, FIG. 4 is an exploded perspective view of the strap-type meter according to the present invention, and FIGS. 5 to 13 are explanatory views of the configuration of each part of the meter according to the present invention. 300...Movable part, 310...Pointer, 320...
... Pointer mounting member, 324 ... Recessed part, 324', 3
24''...Protrusion, 350...Holding member, 38
0,380'...Haribai.

Claims (1)

[Scope of utility model registration request] The movable part includes a pointer attachment member having a recessed portion in which a pair of protrusions are formed, and a movable coil holding member to which a tension band is attached via a pair of tips and is coupled to the pointer attachment member. A tension band type instrument, characterized in that the starting point of the effective length of the band on the side of the movable part is fixed by the pair of protrusions.