CN219438519U - Myopia preventer - Google Patents

Abstract

When the myopia preventer is used, the chin support plate box hinge and the seat plate hinge are respectively rotated by about 270 degrees, the upper and middle support rod displacement is adjusted by pressing the limiting pin buttons by hands, the proper height of a user is achieved, the braces are held by hands like a vest, the braces are buckled on the braces, the braces on the right lock catch are adjusted to the proper positions of a human body, the left and right chin support plates are closed, the user can read and write without the bow back, the eyes of the user cannot be too close to a desk, the eyes of the user cannot be too close to the desk, the user cannot myopia, the user cannot bow back, the user cannot hold the chin by hands, the possibility of scoliosis is small, the user can send the chin support plate back to the chin support plate box when leaving the desk, the user can press the lock catch, the hinge of the lower support rod and the hinge of the chin support plate box are reversed when the user holds the user, the upper support rod and the middle support rod are retracted into the lower support rod by pressing the limiting pin buttons, and the schoolbag can be put in, and the schoolbag is small in size, light in weight and convenient to carry.

Description

Myopia preventer

Technical Field

The utility model relates to a learning auxiliary product, in particular to a myopia preventer.

Background

People want to correct the learning posture, so that the people are difficult to practice, so that a plurality of teenagers can read and write the back of a bow, the body is prone to lie on a desk, eyes are very close to the desk, myopia is caused when the eyes are long, the cheek is supported by one hand, the spine is likely to be sideways bent when the posture is incorrect, so that the problem of learning sitting postures is solved, people want a plurality of methods to prevent the phenomenon, the products have chin supporting fork type, backboard hoop type and electronic type, and the existing products have advantages and disadvantages and are not all intended.

Disclosure of Invention

The technical scheme of the utility model is to provide a myopia preventer with the following structure: the seat is connected with the back lower support rod hinge seat, the upper support rod hinge seat and the chin support plate box hinge are connected through a single hinge structure, and the back center is favorable for straightening the sitting posture, the body can incline forwards by a certain angle during writing, the proper distance between eyes and a table is controlled, the effect of myopia prevention of the eyes is achieved, the upper support rod hinge seat, the back plate and the upper support rod are integrally arranged, the support rod height adjusting button is arranged between the upper support rod hinge seat and the chin support plate box hinge, the operation is convenient, the left and right support rods penetrate through the upper support rod through the right support rod through the left support rod, the lower support rod through the right support rod, the left support rod is balanced automatically, and the back support rod is concise and quick.

Drawings

Fig. 1 is a schematic side view of the myopia preventer of the present utility model.

Fig. 2 is a schematic front view of the myopia preventer of the present utility model.

Figure 3 is a schematic view of the myopia preventer of the present utility model of figures 1 A-A.

Fig. 4 is a schematic view of the myopia preventer of fig. 1B-B of the present utility model.

Detailed Description

Number designation of the drawings: 1. the seat plate, 2, lower support rod hinge seat, 3, lower limit of braces, 4, lower support rod, 5, middle support rod, 6, backboard, 7, backboard sleeve, 8, limit pin, 9, ejector rod, 10, upper support rod, 11, upper support rod hinge seat, 12, upper limit of braces, 13, chin support plate box hinge, 14, limit pin button, 15, chin support plate box, 16, chin support plate, 17, right braces, 18, right lock catch, 19, left braces, 20, left lock catch.

The utility model is described in further detail below with reference to the drawings and the detailed description.

The hinge behind the seat plate 1 is connected with a lower support rod hinge seat 2 through a pin shaft, lower support rod hinge seat 2 is provided with braces lower limit 3 on two sides, lower support rod hinge seat 2 is fixedly provided with a lower support rod 4, middle support rod 5 is arranged on lower support rod 4 in a sliding fit mode, upper support rod 10 is arranged on middle support rod 5 in a sliding fit mode, limit pin 8 is arranged in upper support rod 10, push rod 9 is connected on limit pin 8, limit pin button 14 is connected on push rod 9, upper support rod 10 displaces in middle support rod 5, middle support rod 5 displaces in lower support rod 4, limit pin 8 stretches and contracts under control of limit pin button 14 and push rod 9, limit pin 8 is positioned in holes on sides of middle support rod 5 and lower support rod 4, and the total height of the support rod is achieved.

The upper support rod 10 is fixedly connected with the upper support rod hinge seat 11, the two sides of the upper support rod hinge seat 11 are provided with upper braces limiting 12, the lower part of the upper support rod hinge seat 11 is provided with a back plate 6 on the inner side of the upper support rod 10, the side surface of the back plate 6 is provided with a back plate sleeve 7 around the upper support rod 10, the upper support rod hinge seat 11, the upper braces limiting 12, the back plate 6 and the back plate sleeve 7 are of an integrated structure, the hole of the back plate sleeve 7 is larger than the middle support rod 5 and the lower support rod 4, and a limiting pin button 14 extends upwards in the middle of the upper support rod hinge seat 11.

The chin support plate box hinge 13 is in pin shaft connection with the upper support rod hinge seat 11, the chin support plate box hinge 13 and the chin support plate box 15 are of an integrated structure, the chin support plate 16 is of a bilateral symmetry structure, and the chin support plate 16 slides and stretches in the chin support plate box 15.

One end of the right strap 17 is connected with a right lock catch 18, the other end is connected with a left strap 19, a left lock catch 20, a strap lower limit 3 and the right lock catch 18 through the strap upper limit 12 to form a closed loop, the right lock catch 18 is inserted into the left lock catch 20, and the balance of the right strap 17 and the left strap 19 is automatically adjusted left and right.

Due to the adoption of the structure, when the multifunctional folding schoolbag is used, the chin support plate box hinge and the seat plate hinge are respectively rotated by 270 degrees, the upper support rod and the middle support rod are adjusted to be displaced by pressing the limiting pin button by hands, the proper height of a user is achieved, the braces are held like a vest, the braces are buckled by hand, the braces on the right lock catch are adjusted to be at proper positions of a human body, the left chin support plate and the right chin support plate are closed, the user can read and write without the bow back, the eyes of the user cannot be too close to a desk, the eyes of the user cannot be too close to the desk, myopia is prevented, the user cannot bow back, the user cannot hold the chin by one hand, the possibility of scoliosis is small, the user can send the chin support plate back to the chin support plate box when the user leaves the desk, the user can press the lock catch, the lower support rod hinge and the chin support plate box hinge by reversely, the user presses the limiting pin button to retract the upper support rod and the middle support rod into the lower support rod when the schoolbag is stored, and the schoolbag can be put in the schoolbag, and the multifunctional folding schoolbag is small in size, light in weight and convenient to carry.

Claims (4)

1. A myopia preventer, which is characterized in that: the hinge behind the seat plate (1) is connected with a lower support rod hinge seat (2) through a pin shaft, two sides of the lower support rod hinge seat (2) are provided with a brace lower limit (3), the lower support rod hinge seat (2) is fixedly connected with an upper lower support rod (4), a middle support rod (5) is arranged on the lower support rod (4), an upper support rod (10) is arranged on the middle support rod (5), a limit pin (8) is arranged in the upper support rod (10), a push rod (9) is arranged on the limit pin (8), a limit pin button (14) is arranged on the push rod (9), the upper support rod (10) is displaced in the middle support rod (5), the middle support rod (5) is displaced in the lower support rod (4), the limit pin (8) is controlled to stretch out and draw back by the limit pin button (14) and the push rod (9), the limit pin (8) is positioned in a hole on the side surface of the middle support rod (5) and the lower support rod (4), the upper support rod (10) is fixedly connected with an upper hinge seat (11), brace upper limit (12) is arranged on two sides of the upper support rod hinge seat (11), the upper support rod (12) is displaced in the brace inner side of the upper support rod (12), the upper support rod (11) is provided with a back plate (6), the back plate (6) is sleeved on the back plate (6), the back plate sleeve (7) hole is greater than well bracing piece (5), lower bracing piece (4), there is spacer pin button (14) to stretch out upwards in the middle of last bracing piece hinge seat (11), chin support plate box hinge (13) and last bracing piece hinge seat (11) round pin hub connection, chin support plate box hinge (13) and chin support plate box (15) integrated structure, chin support plate (16) are bilateral symmetry structure, chin support plate (16) are in chin support plate box (15) slide flexible, right braces (17) one end is connected with right hasp (18), the other end is spacing (12) to left braces (19) on the braces, left hasp (20), braces lower limit (3), right hasp (18) form a closed loop, insert left hasp (20) with right hasp (18), automatic adjustment is balanced about right braces (17) and left braces (19).

2. A myopia preventer according to claim 1, wherein: the seat plate (1) is connected with the back lower support rod hinge seat (2), and the upper support rod hinge seat (11) is connected with the chin support plate box hinge (13) by adopting a single hinge structure and is arranged at the center of the back.

3. A myopia preventer according to claim 1, wherein: the upper support rod hinge seat (11), the upper brace limit (12), the back plate (6) and the back plate sleeve (7) are of an integrated structure.

4. A myopia preventer according to claim 1, wherein: the limiting pin button (14) is operated on the upper surface of the chin bar box hinge (13).