CN2257602Y

CN2257602Y - Distance measuring and angle measurement compasses

Info

Publication number: CN2257602Y
Application number: CN 95238054
Authority: CN
Inventors: 谭小勇
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-11-20
Filing date: 1995-11-20
Publication date: 1997-07-09
Anticipated expiration: 2005-11-20

Abstract

The utility model introduces distance measuring and angle measurement compasses which are composed of a main frame of the compasses and two dial discs arranged on a rotary shaft of the compasses. The utility model is characterized in that the outer sides and the inner sides of the upper part and the middle part of a support bracket of the hollow compasses are respectively provided with a belt passing hole having a number read hole, and three rollers which are passed from top to bottom and a measuring belt are arranged in a hollow cavity. The lower end of the measuring belt is connected with a rubber plate which is fixed at a compasses body, and the other end is fixedly connected with another rubber plate by penetrating through the belt passing hole arranged on the support bracket of the compasses body. The two dial discs are sheathed and overlapped in a concentric circle shape, and are arranged on the rotary shaft of the compasses.

Description

Span angle measurement compasses

The utility model relates to a kind of span angle measurement compasses, belongs to the surveying and mapping tool class.

Compasses commonly used at present normally are used to do circular arc, also can come span as cutting apart rule, but not possess the function that takes measurement of an angle.

It is a kind of when drawing assignment that the purpose of this utility model is to provide, and can draw circle energy distance again, the multifunctional compass that can also take measurement of an angle simultaneously, one of make rule many with, improve the drawing usefulness.

This span angle measurement compasses are made up of compasses body frame (1) and two dial discs, a compasses pole that it is characterized in that described compasses body frame (1) is the empty stomach cavity, and respectively establishes a reading hole (2) and (5) with holes excessively in the outside and the inboard at this empty stomach compasses cavity top and middle part; Simultaneously, set up three roller bearings (G) in three positions, upper, middle and lower of this empty stomach cavity again; , finally get back to middle roller bearing (G) from bottom to top again on three roller bearings, have the measurement band (3) of length scale mark in regular turn around the home, it is affixed with bungee (4) or extension spring that an end is fixedly arranged in the compasses body that roller bearing (G) is walked around down in the lower end of this measurement band (3); Its upper end passes (5) with holes excessively at compasses body middle part after roller bearing (G), the middle roller bearing (G) on walking around, be fixed on another compasses pole.

Described dial disc, one of them is fixed disc (6), another is sliding disc (8), described fixed disc (6) is fixedly arranged on the shoulder bank of compasses body frame (1), described sliding disc (8) then is on the rotation axis (7) that concentric shape is placed on the compasses body frame with fixed disc (6), described fixed disc upper edge circumference branch divides 0～360 ° of scale into simultaneously, and sliding disc (8) then evenly is divided into 10 little lattice on 90 ° of circular arcs.

According to the span angle measurement compasses of technique scheme design, its advantage is: not only have the function that general compasses are drawn circle, and can also be used for measuring distance and angle, have the characteristics of a rule multipotency.

The utility model design concept utilizes the compasses bipod to open, and band is measured in pulling, measures band and directly measures the distance of removing in the middle of the bipod by driving, thereby draw the length quantity of two tiptoes by 1: 2 ratio.Form trapezoidal neutrality line because publishing in instalments in the middle of the bipod is the compasses bipod, the inclined to one side distance of crossing the pin center line of needle point equals the distance of bipod top point of fixity, so the distance of the line in the middle of the bipod is two tiptoe distances half all the time.If when measuring not too accurately, the length that scalable two tiptoes stretch out, compasses are closed and go up on one point.

Utilize two disks to produce relatively and slide, the angle that staggers is just arranged, thereby draw the turned radian of compasses tiptoe, utilize the method for a few lattice readings, the reading angle once is accurate to.

Claims

1, a kind of span angle measurement compasses are made up of compasses body frame (1) and two dial discs, it is characterized in that:

A compasses pole of A, described compasses body frame (1) is the empty stomach cavity, and respectively establishes a reading hole (2) and (5) with holes excessively in the outside and the inboard at this empty stomach compasses cavity top and middle part; Simultaneously, set up three roller bearings (G) in three positions, upper, middle and lower of this empty stomach cavity again; , finally get back to middle roller bearing (G) from bottom to top again on three roller bearings, have the measurement band (3) of length scale mark in regular turn around the home, it is affixed with bungee (4) or extension spring that an end is fixedly arranged in the compasses body that roller bearing (G) is walked around down in the lower end of this measurement band (3); Its upper end passes (5) with holes excessively at compasses body middle part after roller bearing (G), the middle roller bearing (G) on walking around, be fixed on another compasses pole.

B, described dial disc, one of them is fixed disc (6), another is sliding disc (8), described fixed disc (6) is fixedly arranged on the shoulder bank of compasses body frame (1), described sliding disc (8) then is on the rotation axis (7) that concentric shape is placed on the compasses body frame with fixed disc (6), described fixed disc upper edge circumference branch divides 0～360 ° of scale into simultaneously, and sliding disc (8) then evenly is divided into 10 little lattice on 90 ° of circular arcs.