JPH0424450Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to an electric indicator instrument, and in particular improves the zero position adjustment mechanism.

It is known that an electric indicator uses a pair of upper and lower tension straps to hold the movable part and apply control torque. In such electric indicating instruments, the zero position of the pointer is adjusted by changing the torsion torque of the tension strap. In this case, when the amount of adjustment is relatively small, it is done by changing the torsion torque of the upper tension band, but when the amount of adjustment is large, or in the case of a suppressed type (SUPPRESS ED TYPE) electric indicator, the lower tension The twisting torque of the band is adjusted.

[Prior Art] By the way, an electric indicator consists of an internal device consisting of a moving coil and an excitation part, and a case that houses this internal device, but when the internal device is assembled, the torsional torque of the upper tension band is also reduced. , the torsional torque of the lower tensioner can also be adjusted. However, after the internal unit is assembled into the case, the torsional torque of the upper tension band can be adjusted by removing the cover, but the adjustment member for the lower tension band is harder to see than the upper side of the internal unit, so it cannot be left as is. Difficult to adjust. Therefore, a hole with a lid was provided at the bottom of the case, and the torsion torque of the lower tension band was adjusted through this hole. However, it is not desirable to drill a hole in the bottom of the case for zero adjustment. On the other hand, there is also a method in which an L-shaped hook rod is prepared without providing a hole in the case, and the torsion torque of the lower tension band is adjusted from the upper side of the inner device using this hook rod. However, since the adjustment member of the lower tension band is harder to see than the upper side, adjustment using a hook bar must be done by hand, which can lead to damage to the instrument internals.

[Problem that the invention attempts to solve]

This invention was made to solve these problems, and even after the internal device is assembled into the case,
It is an object of the present invention to provide an electric indicator that allows the torsional torque of the lower tension band to be adjusted more easily than the upper side, and that allows the zero position adjustment of the instrument to be performed more easily.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a hole, protrusion, or cut located approximately in the center of the coil gap so that it can be seen from the upper side of the inner instrument through the coil gap. A hanging portion consisting of a notch is provided in the lower zero adjustment member. Examples will be described in detail below.

〔Example〕

Fig. 1 is a configuration diagram of one embodiment of the electric indicator according to the present invention, in which Fig. A is a top view, Fig. B is a side view, and Fig. C is a bottom view. It is shown. In FIGS. 1A to 1C, 11 is a cylindrical core, and 12a and 12b are semicircular pole shoes attached to the side surfaces of the core 11, respectively. 13 is a cylindrical yoke, and 14 is a U-shaped frame. The frame 14 is attached to the core 11, which is connected to the yoke 13 through a certain gap G.
installed inside. Reference numeral 15 indicates its mounting screw. These members 11 to 15
The excitation part of the instrument is configured by:

21 is a movable coil, 22 is a pointer, 23 is a zero adjustment arm integrally formed with a cylindrical stopper portion 23a, 2
4 is a tension spring attached to the upper surface of this zero adjustment arm. The movable coil 21 is mounted in a gap G formed between the core 11 and the yoke 13 so as to surround the core 11 in the excitation section. The zero adjustment arm 23 has a cylindrical stopper portion 23a.
is rotatably attached within a through hole 14b formed in one arm 14a of the frame 14. Although not visible in the figure, inside the cylindrical stopper portion 23a of the zero adjustment arm 23, there is an upper tension band whose one end is attached to the tension spring 24 and the other end is attached to the boss 25 of the movable coil 21. It is provided.

30 is a lower tension spring, and 40 is a lower zero adjustment member provided according to the present invention. The lower zero adjustment member 40 has a tension spring 3 on one side thereof.
0 is attached, and a cylindrical stopper part 41 is attached to the other side.
is formed, and four arms 42a to 42d arranged radially are provided on the side surface by integral molding. Holes 43 are provided at the tips of the arms 42a to 42b, respectively.
a to 43d are provided. Reference numeral 16 indicates an attachment member for attaching the inner device of the meter to the case.

In the lower zero adjustment member 40 having such a configuration, the cylindrical stopper portion 41 is connected to the other arm 1 of the frame 14.
It is rotatably mounted in a through hole 14c formed in 4b. Although not visible in the figure, the lower zero adjustment member 4
A lower tension band is provided in the cylindrical stopper portion 41 of 0, one end of which is attached to the tension spring 30, and the other end of which is attached to the boss 26 of the movable coil 21. When the lower zero adjustment member 40 is attached to the arm 14b of the frame 14, the holes 43a to 43a provided in the arms 42a to 42d of the lower zero adjustment member
43d is located at the center of the coil gap G formed between the core 11 and the yoke 13, and the holes 43a to 43d are visible through the gap G from the top surface of the instrument as shown in FIG.

50 shown in FIG. 2 is a tool used in the present invention. This tool includes a grip portion 51 and holes 43a to 43 provided in arms 42a to 42d of the lower zero adjustment member 40.
The tip portion 52 is thick enough to be inserted into the tip.

To perform zero adjustment in the instrument shown in FIG. 1, as mentioned above, when the adjustment range is small, the zero adjustment arm 23 is moved to change the torsional force of the upper tension band, but when the adjustment range is large, Alternatively, in the case of a suppressed type, the lower zero adjustment member 40 is rotated to change the torsion torque of the lower tension band. in this case,
As shown in FIG. 1, when viewed from above the instrument, the arms 42a to 42 of the lower zero adjustment member 40 pass through the gap G.
Among the holes 43a to 43d formed in d, at least two holes 43a and 43c are visible. Therefore, the tip 52 of the tool 50 shown in FIG. 2 is inserted into the visible hole through the gap G, and the lower zero adjustment member 4 is inserted.
0 in the direction along the gap G. As a result, the torsional torque of the lower tension band changes via the lower tension spring 30, and the zero position of the pointer 22 is adjusted. In addition, in the embodiment described above, the tip part 5 of the tool
Although the case has been described in which the holes 43a to 43d are provided as hooking portions for hooking 2 to the lower zero adjustment member 40,
A protrusion may be used instead of the hole.

FIG. 3 is a block diagram of the main parts of another embodiment of the electric indicator according to the present invention. This figure is a view seen from the bottom of the instrument, and corresponds to Figure 1C. In FIG. 3, 60 is a lower zero adjustment member. 1st
In the instrument shown in the figure, the hole 4 is used as a hook portion for hooking the tip of the tool 50 to the four arms 42a to 42d arranged radially as the lower zero adjustment member 40.
3a to 43d, the lower zero adjustment member 60 in FIG. 3 has notches 61a to 61a instead of holes.
61d is provided. This notch 61a~
61d is located in the middle of the coil gap G. Therefore, by using the tool 50 shown in FIG. 2 and fitting its tip 52 into the notches 61a to 61d, the lower zero adjustment member 60 can be easily rotated along the gap G. The zero position can be adjusted by

In addition, although the case where the tension band was used was illustrated in the Example mentioned above, it may replace with a tension band and may be a control spring. In that case, the moving coil is held by a pivot.

[Effects of this invention]

As explained above, in the present invention, holes are provided in the lower zero adjustment member that adjusts the torsional torque of the lower tension band.
A hanging part consisting of a protrusion or notch is provided to be located in the center of the coil gap G, and the zero position adjustment is performed by rotating the lower zero adjustment member from the upper side of the instrument internal instrument through the gap. Therefore, the hook part can be easily confirmed visually from the top of the inner part of the instrument. Therefore, it is possible to obtain a mechanism in which there is no risk of damaging the internal instrument during zero position adjustment, unlike in the prior art. Further, since adjustment can be made from the top of the meter, the zero position can be easily adjusted even after the inner device of the meter is assembled into the case, without providing an adjustment hole or the like in the bottom of the case.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of an embodiment of the electric indicator according to the present invention, in which Fig. A is a top view, B is a side view, C is a bottom view, and Fig. 2 shows a tool used in the instrument of Fig. 1. FIG. 3 is a diagram showing the main parts of another embodiment of the electrical indicator according to the present invention. 11... Core, 13... Yoke, 14... Frame, 21... Moving coil, 23... Zero adjustment arm, 4
0,60...Lower zero adjustment member, 43a to 43d, 6
1a to 61d...Holding portion, G...Gap.

Claims (1)

[Scope of utility model registration request] A U-shaped frame attached to an excitation part consisting of a yoke and a core disposed inside the yoke through a gap, a pointer attached and rotatably disposed in the gap so as to surround the core; A movable coil to which a control torque is applied by a tension band or a control spring, a zero adjustment arm rotatably mounted on the upper part of the frame, and a plurality of arms each having a hole or notch for zero position adjustment. An electrical indicator comprising an internal instrument comprising a lower zero adjustment member rotatably attached to the lower part of the frame such that the hole or notch is located approximately at the center of the gap.