CN2321390Y

CN2321390Y - Double-vernier prism type exophthalmometer

Info

Publication number: CN2321390Y
Application number: CN 98209618
Authority: CN
Inventors: 万安云; 万安静
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-01-07
Filing date: 1998-01-07
Publication date: 1999-06-02
Anticipated expiration: 2008-01-07

Abstract

The utility model discloses a double vernier triple prism type protometer, which is changed from an existing Hertel type protometer. The utility model is characterized in that the peaks of the two triple prisms are respectively provided with a pulley; the groove of the side arm of the pulley is embedded with a sealing ring-shaped line which is provided with two marks along with the transverse direction and the wire direction; the marks capable of uniform speed moving is substitute for the two fixing marks of the original Hertel type protometer, and thereby, the utility model overcomes the defect of reading error due to design defect of the original Hertel type protometer. The utility model has the advantages of 100 percent correct reading on the optics theory, which provides a more accurate device for measuring the degree of exophthalmus for clinicians.

Description

Double vernier triple prism type statometer

This utility model relates to a kind of Medical Instruments, relates in particular to a kind of statometer that is used to measure patient's expophthalmos degree.

At present, China is used for clinically measuring that the expophthalmos degree uses at most, the most general instrument is Hertel formula statometer, and it was invented by EHertel in 1905, was extensive use of so far clinically always.It is made up of two isosceles right angle prisms and a connecting rod, is equipped with scale on prism two side faces and the connecting rod, and is provided with two grooves in the two prisms inboard by framework, and frame is on the eye socket of patient both sides.During use, the measured faces the place ahead, makes the little groove frame of statometer on the eye socket of patient both sides, and is firmly even, keeps uneven, and side amount person closes a glance, and moving-head makes the simple eye two red lines coincidence of seeing, at this moment the pairing scale value of corneal vertex is patient's expophthalmos degree.Yet this instrument exists optic design defect, thereby unavoidably exists the error in reading of measurement, is embodied in following three aspects: 1, reading changes with the variable in distance between gauger's eye distance statometer sightingpiston; 2, reading changes from variation with measured's corneal vertex and red line scale spacing; 3, reading changes from variation with corneal vertex and prism scale interplanar distance.Generally speaking, be positioned at when seeing that the two wires overlaps position readings when simple eye, its numerical value is influenced by above three aspect factor, can not really avoid error.

The purpose of this utility model is: to textural improvement of Hertel formula statometer, overcome its defective in design, really avoid the not scientific error of bringing by structural design.

The technical solution of the utility model is: cancellation two is red line mark fixedly, and is equipped with the pulley of sidewall band groove at place, statometer two or three prismatical summit, and its groove is embedded with the closed circular line, make when stirring pulley, but this line constant speed movement.

This utility model is operation for convenience, and the pulley at two outer point places of statometer adopts finger with handles to stir pulley.

This utility model is the user for convenience, the user is promptly purchased promptly to be used, also two right-angle sides of ringed line upper edge prism promptly laterally with vertically be provided with labelling, the mapping point of traversal marker on horizontal right angle face equated to the distance on corresponding prismatical summit with mapping point on vertically being marked at vertical right angle face to the distance on summit, corresponding prism right angle.

But this utility model adopts assembly pulley to make two labelling constant speed movement, to replace two fixation marks, thereby overcome the structure defective of former Hertel formula statometer, really overcome the error in reading of bringing by design, it is correct to reach reading 100% on optical theory, provides an instrument more accurately for the clinician measures the expophthalmos degree.

Fig. 1: be structure chart of the present utility model

Fig. 2: be vertical view of the present utility model

Below in conjunction with accompanying drawing this utility model is elaborated.

This utility model is made up of two isosceles right angle prisms 1 and connecting rod 2, and the medial surface of prism 1 is provided with even scale, and wherein a prism can be along connecting rod 2 move left and right, and connecting rod 2 is provided with scale.Two prism 1 inboards are equipped with groove 3 by framework, and summit place is equipped with the pulley 4 of sidepiece band groove, and this groove is embedded wired 5, and line 5 forms sealing triangle ring-types by pulley 4.The pulley that is positioned at 1 liang of outer point of prism be with handles 6 finger stir pulley line 5 along two right-angle sides of prism promptly laterally with vertically be provided with labelling E, D, traversal marker E is equated, i.e. AD '=CE '=d to the distance on corresponding two prismatical summits with the mapping point D ' of vertical labelling D on vertical right angle face to the distance on summit, corresponding prism right angle at the mapping point E ' on the horizontal right angle face.

Claims

1, a kind of double vernier triple prism type statometer, form by two isosceles right angle prisms (1) and a connecting rod (2), the medial surface of prism (1) is provided with even scale, wherein a prism can be along connecting rod (2) move left and right, connecting rod (2) is provided with scale, two prism inboards are equipped with groove (3) by framework, it is characterized in that: the place, three summits of two prisms (1) is equipped with pulley (4), pulley (4) sidepiece is provided with groove, groove embedded wired (5), line (5) forms sealing triangle ring-type by pulley (4).

2, double vernier triple prism type statometer according to claim 1 is characterized in that: the pulley that is arranged at prism (1) two outer point is that the finger of (6) with handles is stirred pulley.

3, double vernier triple prism type statometer according to claim 1 and 2, it is characterized in that: line (5) along two right-angle sides of prism promptly laterally with vertically be provided with labelling, the mapping point of traversal marker on horizontal right angle face equated to the distance on corresponding prismatical summit with mapping point on vertically being marked at vertical right angle face to the distance on summit, corresponding prism right angle.