CN2274485Y

CN2274485Y - Headwear visual acuity therapeutic instrument

Info

Publication number: CN2274485Y
Application number: CN 96224719
Authority: CN
Inventors: 李衡国; 欧阳开俊; 罗元生
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-10-05
Filing date: 1996-10-05
Publication date: 1998-02-18
Anticipated expiration: 2006-10-05

Abstract

The utility model relates to a headwear visual acuity therapeutic instrument which comprises a basal body in the shape of an endless belt. The utility model is characterized in that the front end of the basal body is movably connected with an eye covering plate, and control circuits are arranged in both sides. When the head of a user slopes down about 20 DEG, a motor rotates forward, and the eye covering plate turns down and covers the line of sight; only when the head of the user rises and goes back to the normal position, the motor rotates backward, and the eye covering plate turns up to restore the line of sight, so the user is forced to keep normal distance of the line of sight. The utility model has the advantages of simple structure, low cost, no noise or influence on surrounding environment, convenient use, good effect, economical use and practicality.

Description

Wear the vision normalizer

This utility model relates to a kind of human eyesight protector, particularly a kind of vision normalizer of wearing.

People are reading a book, when writing, too closely will have a strong impact on the vision of eyes as the distance of eyes and books.For reminding, protect particularly student's vision of people; devices such as many pre-myopia prevention warnings have appearred in the prior art; but their complex structures; the cost height, and alarm sound influences surrounding, and user is only played suggesting effect; have only initiatively and correct; the competence exertion effect, effect is undesirable, uses inconvenient.

The purpose of this utility model is in order to overcome above-mentioned weak point, and provide a kind of simple in structure, cost is low, silent, easy to use, the effective vision normalizer of wearing.

The vision normalizer of wearing of the present utility model comprises endless belt shape matrix, it is characterized in that in hoodwink plate of matrix front end flexible connection, the both sides control circuit being housed.

Fig. 1 is this utility model structural representation;

Fig. 2 is limit switch installation site figure;

Fig. 3 is a two-way admittance switch junctions composition;

Fig. 4 is the control circuit circuit diagram.

Now illustrated embodiment is made detailed description to this utility model in conjunction with the accompanying drawings.

The matrix 1 of wearing the vision normalizer is endless belt shape plastic body, and two sides and front are separately installed with removable cover, on the both sides that its rear end opening connects corresponding snap-fastener is housed respectively.Hoodwink plate 2 inboard limits are the arc limit that matches with matrix 1 front end face, fix a rotating shaft 3 by two, arc limit, rotating shaft 3 is snapped in the connection circular hole in matrix 1 front end face by matrix 1 front removable cover, fix a worm gear 4 on rotating shaft 3 one ends, worm screw 5 engagements on worm gear 4 and the DC micromotor D output shaft that is installed in the matrix 1.In the control circuit, the positive plate of dc source E is connected in series behind the on and off switch K and connects limit switch K ₆, lower position switch K ₅One end, K ₆Other end serial connection reversal switch K ₃The back also meets positive turn-off pass K ₁, direct current generator D one end, K ₅The other end is connected in series positive turn-off and closes K ₂The back also meets the direct current generator D other end, reversal switch K ₄One end, K ₄The other end also meets K ₁The other end, power supply E negative pole.Limit switch K ₅, K ₆Be chip switch, be installed in the dual-side of matrix 1 front end face respectively, the corresponding position in rotating shaft 3 is fixed with respectively hits post.K ₁, K ₃, K ₂, K ₄Be produced in two two-way admittance pipes, the conducting body is an insulator, and the two ends inwall is manufactured with the two-stage nitration metal contact layer of being separated by respectively, is equipped with slidably metal bar in the conduction pipe inner chamber.Conduction pipe, power supply E, K switch are fixed in matrix 1 both sides, the K exposing surface.

This utility model is owing to adopt above design, and when user head downward-sloping about 20 was spent, the metal bar in the conduction pipe is slide-actuating switching K forward ₁, K ₂The contact, motor D is just changeed, and hoodwink plate 2 is turned down and is blocked sight line, along with rotating shaft 3 is rotated, hits post with K ₅Disconnection, K ₆Closure, the motor D stall.Have only when lifting the recovery normal position on the user head, the metal bar in the conduction pipe slides backward the connection K switch ₃, K ₄The contact, the motor D counter-rotating, hoodwink plate 2 just can roll up the recovery sight line, forces user to keep normal optical range.Simple in structure, cost is low, silent, does not influence surrounding, and is easy to use, effective, economical and practical.

Claims

1, a kind of vision normalizer of wearing, comprise that two sides and front are separately installed with the endless belt shape matrix (1) of removable cover, it is characterized in that matrix (1) front end flexibly connects a hoodwink plate (2), control circuit is housed in the both sides, the inboard limit of hoodwink plate (2) is the arc limit that matches with matrix (1) front end face, fix a rotating shaft (3) by two, arc limit, rotating shaft (3) is snapped in the interior connection circular hole of matrix (1) front end face by matrix (1) front removable cover, fix a worm gear (4) on rotating shaft (3) one ends, worm gear (4) and the worm screw (5) that is installed on the interior direct current generator D output shaft of matrix (1) mesh, in the control circuit, the positive plate of power supply E is connected in series behind the on and off switch K and connects limit switch K ₆, lower position switch K ₅One end, K ₆Other end serial connection reversal switch K ₃The back also meets positive turn-off pass K ₁, direct current generator D one end, K ₅The other end is connected in series positive turn-off and closes K ₂The back also meets the direct current generator D other end, reversal switch K ₄One end, K ₄The other end also meets K ₁The other end, power supply E negative pole, limit switch K ₅, K ₆Be chip switch, be installed in the dual-side of matrix (1) front end face respectively, the corresponding position in rotating shaft (3) is fixed with respectively hits post, K ₁, K ₃, K ₂, K ₄Be produced in two two-way admittance pipes, the conducting body is an insulator, and the two ends inwall is manufactured with the two-stage nitration metal contact layer of being separated by respectively, is equipped with slidably metal bar in the conduction pipe inner chamber, conduction pipe, power supply E, K switch are fixed in matrix (1) both sides, the K exposing surface.