CN2793691Y - Magnetic compass equipment for ship - Google Patents

Abstract

The utility model provides a magnetic compass apparatus for a ship. The utility model is provided with a compass body and a word plate (5), wherein an upper cover (6) of the compass body is composed of a plane which is crossed with a spherical surface with upward convex surfaces, a shaft line of the spherical surface is parallel to the shaft line of the upper cover and is at the front of the compass body and outside the word plate, and the thickness of the spherical surface is even. The front of the upper cover of the compass body of the magnetic compass apparatus for a ship provided by the utility model, namely, the part pointing to the marching direction of a vessel, is the back part of the spherical surface, namely, a cambered surface is backwards and downwards extended from the edge of the upper cover, liquid (2) in a spherical surface part is formed into a convex lens, scales on the word plate below the convex lens are magnifiedd, drivers' sight lines are basically parallel to a normal of the spherical surface, and drivers can quickly identify and read the sailing direction of the vessel from the front of the magnetic compass apparatus for a ship according to using habit.

Description

Magnetic compass instrument peculiar to vessel

Technical field the utility model relates to magnetic compass instrument peculiar to vessel, the used instrument of direction indication, i.e. navigation instrument when belonging to a kind of ship's navigation.

Background technology magnetic compass instrument peculiar to vessel, one airtight sieve basin body is generally arranged, the loam cake of sieve basin body is for circular transparent flat and a direction sign directrix is arranged, in sieve basin body: a disc letter stencil that is shaped on azimuth scale on it is arranged, letter stencil is installed on the float, and bar magnet also is installed on float, and float is installed on the thimble on the bearing support by Zhi Zaiyi, bearing support is installed in sieve basin body, full of liquid in sieve basin body.The quality of each point is an axis of symmetry with its axis on the float, and letter stencil and this axis normal, and float withstands on point on the thimble on this axis, and when the effect low suspension of thimble and liquid, letter stencil is the horizontality that scale makes progress on it.As seen, letter stencil is determined the center of rotation of relative sieve basin body by thimble; Keep its level by thimble and liquid; Keep its direction not with the turning to and change of boats and ships by bar magnet, make the driver can through on the standard lines that covers and the scale on the letter stencil navigation direction of judging boats and ships.But less when magnetic compass instrument individuality peculiar to vessel, when especially having had the upper casing of interception to renovate, the loam cake on plane makes the driver be difficult for recognizing fast when boats and ships are advanced fast and read navigating by water direction.The someone has adopted the loam cake of sphere for this reason, and the effect that makes the interior liquid of sphere produce convex lens is amplified the scale on the letter stencil.But the loam cake of sphere is read the letter stencil scale in magnetic compass instrument peculiar to vessel the place ahead because the relation of curved surface can not be recognized the driver, the standard lines of having to have adopted the magnetic compass instrument peculiar to vessel of sphere loam cake is located at the rear of magnetic compass instrument peculiar to vessel, simultaneously the scale on the letter stencil is made and bar magnet indication actual direction opposite configuration, promptly required the driver to recognize the direct of travel of reading boats and ships from the rear of magnetic compass instrument peculiar to vessel.The driver is always towards the boats and ships direct of travel, and the direction on the magnetic compass instrument peculiar to vessel is pointed to the rear, and this and use habit are not inconsistent, and the scale on the letter stencil is opposite with the actual direction of bar magnet indication in addition, makes the people feel not to be very perfect.

Summary of the invention is at above-mentioned deficiency, and technical problem to be solved in the utility model just provides a kind of visual again good magnetic compass instrument peculiar to vessel of use habit that adapts to.

Magnetic compass instrument peculiar to vessel provided by the utility model has sieve basin body and letter stencil, and the loam cake of sieve basin body is that the spheres intersect that plane and convex surface make progress constitutes, and the axis of sphere and loam cake parallel axes is in sieve basin body the place ahead and outside letter stencil, and sphere thickness is even.

Magnetic compass instrument peculiar to vessel provided by the utility model, the centre of sphere of described sphere is below the loam cake planar section, and the centre of sphere of sphere is outside sieve basin body dead ahead, letter stencil and on the intersection point on the straight line of loam cake parallel axes and the plane below the loam cake planar section in other words.Be in the loam cake with the sphere of Plane intersects be with a plane from spherical crown higher primary school that hollow ball downcuts in the spherical crown of the radius of a ball, the cambered surface part of outside this spherical crown axis, downcutting again with the face of cylinder of an axis and spherical crown parallel axes.Wherein cutting planes is the planar section of loam cake, and the cross-sectional perimeter on the cutting face of cylinder is the circumference of loam cake.

Magnetic compass instrument peculiar to vessel provided by the utility model, described sphere shared scope in loam cake is determined with the boundary line summit on itself and plane, is no more than the loam cake center of circle.

Magnetic compass instrument peculiar to vessel provided by the utility model, the place ahead of its sieve basin body loam cake, promptly point to the part of boats and ships direct of travel, it is the rear section of a sphere, being cambered surface extends downwards backward from cover rim, has both made the liquid in this land portions constitute convex lens, has amplified the scale on the letter stencil of its below, make the normal parallel of the basic and sphere of driver's sight line again, make the driver recognize the navigation direction of reading boats and ships fast from magnetic compass instrument peculiar to vessel the place ahead by use habit.

Description of drawings Fig. 1 cuts open figure for the office of the utility model one embodiment;

Fig. 2 is the vertical view (shedding upper casing renovates) of Fig. 1.

The magnetic compass instrument peculiar to vessel that the embodiment present embodiment provides is a kind of magnetic compass instrument that is used for yacht, and its structure as shown in Figure 1, 2.Sieve basin body is installed in the shell 7, shell is rack-mount with two coaxial backing pin shafts, upper casing also is installed on the shell renovates 1, it is that little axle by parallel with the rack-mount bearing pin of shell is installed that upper casing is renovated, therefore it can be according to should little stirring, with shading or light is impinged upon cover from front openings.In compass body, there is letter stencil 5 to be installed on the float 3, the float quality is symmetric points with the center, and its center withstands on the thimble point that is installed on the bearing support, with the center symmetry bar magnet 4 of two levels is installed on the float, the loam cake 6 of sieve basin body is installed in the float top, in anterior not enough half the scope of loam cake is the part of a sphere, the centre of sphere of this sphere the loam cake circumference just before, below the square cards for learning characters board plane.Loam cake is to make with transparent plastic, is full of aero oil 2 in sieve basin body.Aero oil in the sphere constitutes convex lens, can produce amplification effect to the scale on the letter stencil of below.

Claims (3)

1, a kind of magnetic compass instrument peculiar to vessel has sieve basin body and letter stencil, and the loam cake that it is characterized in that sieve basin body is that the spheres intersect that plane and convex surface make progress constitutes, and the axis of sphere and loam cake parallel axes is in sieve basin body the place ahead and outside letter stencil, and sphere thickness is even.

2, magnetic compass instrument peculiar to vessel as claimed in claim 1, the centre of sphere that it is characterized in that described sphere is outside sieve basin body dead ahead, letter stencil and on the intersection point on the straight line of loam cake parallel axes and the plane below the loam cake planar section.

3, magnetic compass instrument peculiar to vessel as claimed in claim 1 or 2 is characterized in that described sphere shared scope in loam cake, determines with the boundary line summit on itself and plane, is no more than the loam cake center of circle.