CN2352963Y

CN2352963Y - Apparatus for mechanically setting zero for electric measuring instrument

Info

Publication number: CN2352963Y
Application number: CN 98247489
Authority: CN
Inventors: 章鸿斌
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-12-30
Filing date: 1998-12-30
Publication date: 1999-12-08
Anticipated expiration: 2008-12-30

Abstract

The utility model relates to an apparatus for mechanically setting zero for an electric measuring instrument. The utility model comprises a guiding element and a regulating element. One end of the guiding element is pivoted with the middle position of the bracket of the measuring structure of the electric measuring instrument by a connecting element. The regulating element is composed of a long perch which is arranged horizontally, and a slide block which is provided with a perforating hole of inner threads. The middle of the long perch is provided with outer threads. The slide block slides into the long perch, the outer threads of the middle of the long perch are matched with the inner threads of the perforating hole of the slide block, and the bottom surface of the slide block is fixedly connected with the other end of the guiding element. By rotating the long perch, the slide block can move on the long perch back and forth; so the guiding element is driven to do reciprocating and parallel swing motion; thereby, the mechanical zero position of a pointer can be regulated.

Description

The zeroing device that is used for electric measuring instrument pointer mechanical zero

The utility model relates to a kind of electric measuring instrument, relates in particular to a kind of zeroing device that is used for electric measuring instrument pointer mechanical zero.

As Fig. 1, shown in Figure 2, the zeroing device of pointer mechanical zero is made up of guide 1 and regulating part 2 in traditional electric measuring instrument, one endlap of guide 1 is put in support 31 centre positions of the measurement structure 3 in the electric measuring instrument, and make guide 1 do the location by connector 32 to articulate with support 31, promptly, making guide 1 also can make opposing parallel with respect to support 3 location rotates, again, this termination of guide 1 again with measurement structure 3 in an end of hairspring (not showing out among the figure) fix and be connected, in addition, regulating part 2 is an eccentric screw, the table that its head of screw 21 allocations are put in the electric measuring instrument covers within the middle shrinkage pool (not showing out among the figure), the off-centre of regulating part 22 penetrates in the slotted hole of guide 1, and regulating part 2 and guide 1 are interlocked.The head of screw 21 of the regulating part 2 that covers by the rotation table drives guide 1 and makes reciprocally swinging, thereby reciprocally swinging returns to zero the pointer (linking to each other with the described hairspring other end) of control electric measuring instrument on the scale panel.Because the structure of existing zeroing device makes that the middle shrinkage pool (usefulness of the head of screw 21 of regulating part 2 is installed) of the table lid from electric measuring instrument is less to the minimum air distance (being creepage distance) of the electrified body of measurement structure 3, and make that the magnitude of voltage of anti-air breakdown of this electric measuring instrument is less, can not meet the requirement of new safety standard.

The purpose of this utility model is to provide a kind of electric measuring instrument creepage distance that makes longer, and the magnitude of voltage of anti-the air breakdown is bigger, meets the zeroing device that is used for electric measuring instrument pointer mechanical zero that new safety standard requires.

The purpose of this utility model is to realize like this, a kind of zeroing device that is used for electric measuring instrument pointer mechanical zero, it comprises guide and regulating part, support centre position by measurement structure in guide one end and the electric measuring instrument articulates by connector, it is characterized in that: described regulating part is by a horizontal positioned, the centre has the slide block that externally threaded stock and has internal thread perforation and forms, described slide block is inserted in stock, the middle external thread of stock is matched with the perforation internal thread of slide block, again, the bottom surface of slide block fixes with the described guide other end and is connected, by rotating stock, slide block is moved around on stock, thereby drive the reciprocal parallel swing of described guide, and carry out the mechanical zero adjustment of pointer.

Owing to adopted above-mentioned technical solution, make the shrinkage pool of an end of stock of the present utility model table lid avris from electric measuring instrument pass, shrinkage pool to the minimum air distance (being creepage distance) of the electrified body of measurement structure increases, thereby improved the magnitude of voltage of anti-the air breakdown, improved security performance.

The utility model is described in further detail below in conjunction with the utility model embodiment accompanying drawing.

Fig. 1 is the perspective view of the zeroing device in the existing electric measuring instrument;

Fig. 2 is that existing zeroing device is placed in the perspective view in the measuring mechanism of electric measuring instrument;

Fig. 3 is that the utility model is placed in the perspective view in the measuring mechanism of electric measuring instrument;

Fig. 4 is that the utility model is placed in the electric measuring instrument partial perspective structural representation in the electric measuring instrument;

Fig. 5 is the side view of Fig. 4.

By Fig. 3, Fig. 4 as can be known, the utility model is used for the zeroing device of electric measuring instrument pointer mechanical zero, it comprises guide 1 and regulating part 4, support 31 centre positions by measurement structure 3 in an end 11 of guide and the electric measuring instrument articulate, promptly, making guide 1 also can make opposing parallel with respect to support 31 location rotates, this termination of guide 1 again with measurement structure 3 in an end of hairspring (not showing out among the figure) fix and be connected, and described regulating part 4 has externally threaded stock 41 by the centre of horizontal positioned and slide block 42 with internal thread perforation is formed, described slide block 42 is inserted in stock 41, the middle external thread (not showing out among the figure) of stock 41 is matched with the perforation internal thread (not showing out among the figure) of slide block 42, again, the bottom surface of slide block 42 fixes with the other end of described guide 12 and is connected, see Fig. 5, one end of stock covers the shrinkage pool 6 of avris from table and passes, by forward and reverse rotation stock 41, slide block 42 is moved around about on the stock 41, thereby drive described guide 1 reciprocal parallel rotation, and carry out the mechanical zero adjustment of pointer 5.

Claims

1. zeroing device that is used for electric measuring instrument pointer mechanical zero, it comprises guide and regulating part, support centre position by measurement structure in guide one end and the electric measuring instrument articulates by connector, it is characterized in that: described regulating part by a horizontal positioned, the centre has the slide block that externally threaded stock and has internal thread perforation and formed, described slide block is inserted in stock, the middle external thread of stock is matched with the perforation internal thread of slide block, again, the bottom surface of slide block fixes with the described guide other end and is connected.