CN206362838U - A kind of permanent-magnet moving coil instrument device - Google Patents

Abstract

The utility model discloses a kind of permanent-magnet moving coil instrument device, usually instrument terminal, measurement range selection turn-knob, dial scale disk and pointer are provided with case panel；Table top is lain in a horizontal plane in by housing to be defined, a magnifying glass is arranged with parallel in dial scale disk upper front, and magnifying glass is arranged on the top of magnifying glass pole, and the end of magnifying glass pole is hinged in the housing；The one side that housing installs magnifying glass pole end is referred to as rear end face, and rear end face is installed with a circular cone, and circular cone forward plane and housing rear end face are coplanar, and the cone of circular cone is protruded backward.The utility model is simple in construction, convenient reading, be readily produced, and reduces artificial error in reading.

Description

A magnetoelectric system instrument device

technical field

The utility model belongs to the technical field of electromechanical equipment and relates to a magnetoelectric system instrument device.

Background technique

When students in engineering colleges and universities do basic experiments related to electricity, they need to use magnetoelectric instruments to measure voltage and current, and the measured voltage and current can be directly read from the dial. One of the error sources of the experimental data in the experiment is the reading error of the measuring instrument, so the use of the magnetoelectric system instrument is even more important.

In order to reduce the artificial reading error of the current common laboratory magnetoelectric instruments, a mirror is installed under the dial. When reading, the line of sight of the human eye, the pointer and the pointer in the mirror coincide. Between the scales, one digit is estimated; secondly, the horizontal placement symbol of the meter is marked on the lower right corner of the dial, which is used to remind the operator that the meter must be placed horizontally when reading, and the reading error is the smallest at this time.

But when the pointer is between the two sub-scales, due to the short distance between the two sub-scales, there is no more subdivided scale mark, so the reading can only be estimated by one bit between the two sub-scales, making the artificial reading error larger. In addition, although text symbols are used to remind operators, there are still a small number of operators who place the instrument vertically when reading, which increases human reading errors.

Utility model content

The purpose of the utility model is to provide a magnetoelectric system instrument device, which solves the problem that the design of the instrument scale indication in the prior art is not fine enough, which leads to large errors in human reading.

The technical solution adopted by the utility model is, a magnetoelectric system instrument device, on the shell panel is usually provided with instrument terminal, range selection knob, dial dial and pointer; the shell is placed horizontally on the table. A magnifying glass is arranged in parallel above the front of the dial dial, the magnifying glass is installed on the top of the magnifying glass pole, and the end of the magnifying glass pole is hinged in the housing; There is a tapered block, the front plane of the tapered block is coplanar with the rear end face of the housing, and the tapered point of the tapered block protrudes backward.

The magnetoelectric system instrument device of the present utility model is also characterized in that:

There are subdivided scales marked on the mirror surface of the magnifying glass.

The beneficial effects of the utility model are:

1) Add a magnifying glass with a more subdivided scale between the two sub-scales on the dial of the instrument dial. When the pointer is between the two sub-scales, read through the more subdivided scale on the magnifying glass, reducing the number of estimated readings inaccuracy, thereby reducing human reading errors;

2) A tapered block is installed at the bottom of the rear end of the meter so that the meter cannot be placed upright, which can avoid reading errors caused by the wrong placement of the meter by the operator. The structure is simple and easy to produce.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure, 1. instrument terminal, 2. range selection knob, 3. dial scale, 4. pointer, 5. magnifying glass, 6. magnifying glass pole, 7. tapered block, 8. housing.

detailed description

The utility model is described below in conjunction with accompanying drawing and specific embodiment.

As shown in Figure 1, the structure of the magnetoelectric instrument device of the present utility model is that it includes an instrument terminal 1, a range selection knob 2, a dial dial 3, a pointer 4, a magnifying glass 5, a magnifying glass pole 6, and a tapered block 7 and the housing 8;

The housing 8 adopts the existing structure. The panel of the housing 8 is usually provided with an instrument terminal 1, a range selection knob 2, a dial dial 3 and a pointer 4. The terminal 1 is used for locking and fixing the experimental wiring, and the range selection Knob 2 is used to adjust the measuring range of the instrument, dial dial 3 and pointer 4 are used for instrument reading, and the components on the panel of the housing 8 and the internal electrical settings are consistent with the existing instrument structure; the housing 8 is placed horizontally on the table as the standard , a magnifying glass 5 is arranged in parallel above the front of the dial dial 3, and the mirror surface of the magnifying glass 5 is marked with a more subdivided scale. Among them, the position of the magnifying glass 5 above the dial dial 3 can be changed by rotating the magnifying glass pole 6; the side of the shell 8 where the end of the magnifying glass pole 6 is installed is called the rear end face (the end face where the operation is located), and the rear end face is fixedly installed with a Conical block 7 (conical block 7 adopts quadrangular conical block or conical block), the front plane of conical block 7 is coplanar with the rear end face of housing 8, and the conical point of conical block 7 protrudes backward.

During the experiment, the housing 8 needs to be placed horizontally on the table. At this time, the reading error is the smallest. In order to improve the accuracy of the artificial reading, the magnifying glass 5 is arranged in parallel above the front of the dial dial 3, and the mirror surface of the magnifying glass 5 is marked with more subdivided Scale, magnifying glass 5 is installed on the top of magnifying glass pole 6, can change position.

In order to prevent the instrument from being placed vertically (upright) by mistake in the experimental operation, resulting in an increase in the reading error, a tapered block 7 is fixedly installed on the bottom edge of the housing 8 towards the end of the magnifying glass pole 6, that is, on the outer wall of the rear end surface. The tapered block 7 Coplanar with the bottom surface of the housing 8, the surface of the tapered block 7 toward the rear end is a tapered surface, so that the instrument cannot be placed vertically, but can only be placed horizontally, thereby avoiding reading errors caused by human error in placing the instrument.

The working process of the utility model is that the housing 8 is placed horizontally on the table, the magnifying glass 5 is located directly above the dial dial 3, and the position can be changed on the dial dial 3 by moving the magnifying glass pole 6, and the magnifying glass 5 is used to set The more subdivided scale between the two sub-scales makes the artificial reading more accurate.

The utility model is not only convenient to use but also convenient to produce by improving the existing structure.

Claims (2)

1. A magnetoelectric system instrument device is provided with an instrument terminal (1), a range selection knob (2), a dial dial (3) and a pointer (4) on the housing (8) panel, and is characterized in that : Place the housing (8) horizontally on the table as the criterion, and a magnifying glass (5) is arranged in parallel above the front of the dial dial (3), the magnifying glass (5) is installed on the top of the magnifying glass pole (6), and the magnifying glass pole The end of (6) is hinged in the housing (8); the side of the end of the housing (8) where the magnifying glass pole (6) is installed is called the rear end face, and a tapered block (7) is fixedly installed on the rear end face, and the tapered block (7) The front plane is coplanar with the rear end face of the housing (8), and the conical point of the conical block (7) protrudes backward. 2. The magnetoelectric system instrument device according to claim 1, characterized in that: subdivided scales are marked on the mirror surface of the magnifying glass (5).