CN214965403U

CN214965403U - Vision screen convenient to adjust

Info

Publication number: CN214965403U
Application number: CN202120990452.4U
Authority: CN
Inventors: 张一航; 胡涛; 范清波; 何涛
Original assignee: Wenzhou Polytechnic
Current assignee: Wenzhou Polytechnic
Priority date: 2021-05-11
Filing date: 2021-05-11
Publication date: 2021-12-03
Anticipated expiration: 2031-05-11

Abstract

The utility model discloses a vision screen convenient to adjust, the on-line screen storage device comprises a base, the top fixedly connected with installation piece of base, be equipped with the cavity in the installation piece, the cavity internal rotation is connected with the screw rod, the fixed cover has been connected with first gear on the screw rod, be equipped with the second gear with first gear engaged with in the cavity, the inner wall of second gear and cavity passes through the bull stick and rotates and connect, the inner wall and the fixedly connected with knob of cavity are run through to the one end of bull stick, the one end of knob is rotated through the pivot and is connected with the arc inserted bar, around being equipped with a plurality of slots that correspond with the arc inserted bar on the outer wall of installation piece, the inner wall and the screw thread that the cavity was run through at the top of screw rod have cup jointed the thread bush. The utility model discloses in through adjustable mechanism's setting, can carry out the free regulation to the vision screen to the result of use of vision screen has been promoted.

Description

Vision screen convenient to adjust

Technical Field

The utility model relates to an eyesight screen technical field especially relates to an eyesight screen convenient to adjust.

Background

The ophthalmology is called 'ophthalmology specialty'. Ophthalmology is the subject of research on diseases that occur in the visual system, including the eyeball and its associated tissues. The vision screen for medical detection mainly detects central vision, namely, detects foveal acuity in a macular area of retina, so that the preliminary condition of visual function can be simply and quickly known, and the vision screen has important significance for clinical diagnosis and treatment of eye diseases. The vision screen is a chart for measuring vision. The visual screen is made according to the principle of visual angle. The inspection of vision generally includes two types of far vision and near vision, the far vision mostly adopts an international standard vision screen, and the table is composed of 12 lines of E characters with different sizes and different opening directions; measuring from 0.1 to 1.5 (or from 4.0 to 5.2); each line is provided with a label, and the normal of the visual acuity screen operation side of the detected person is parallel to one line of 1.0 and is 5 meters away from the visual acuity screen.

But the function of current eyesight screen is comparatively simple, and the eyesight screen can't carry out free adjustment according to actual use needs to influence the result of use of eyesight screen.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving among the prior art function of vision screen comparatively simple, the vision screen can't carry out the problem of freely adjusting according to the in-service use needs, and the vision screen convenient to adjust that provides.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a vision screen convenient to adjust comprises a base, wherein the top of the base is fixedly connected with an installation block, a cavity is arranged in the installation block, a screw rod is rotationally connected in the cavity, a first gear is fixedly sleeved on the screw rod, a second gear meshed with the first gear is arranged in the cavity, the second gear is rotationally connected with the inner wall of the cavity through a rotating rod, one end of the rotating rod penetrates through the inner wall of the cavity and is fixedly connected with a knob, one end of the knob is rotationally connected with an arc-shaped inserted rod through a rotating shaft, a plurality of inserting grooves corresponding to the arc-shaped inserted rod are arranged on the outer wall of the installation block in a surrounding manner, a thread sleeve is sleeved on the top of the screw rod, penetrates through the inner wall of the cavity and is in thread connection, the top of the thread sleeve is rotationally connected with a vision screen body through a pin shaft, a clamping block is fixedly connected on the outer wall of the thread sleeve, and a clamping rod is slidably inserted on the clamping block, the bottom of the vision screen body is provided with a plurality of clamping grooves corresponding to the clamping rods.

Preferably, the rotating shaft is sleeved with a torsion spring, and two ends of the torsion spring are respectively and fixedly connected with the arc-shaped inserted bar and the knob.

Preferably, the top of the screw is fixedly connected with a limiting block.

Preferably, the clamping sleeve is fixedly sleeved at the top of the clamping rod, and the pull rod is fixedly connected at the bottom of the clamping rod.

Preferably, the clamping rod is sleeved with a spring, and two ends of the spring are fixedly connected with the clamping sleeve and the clamping block respectively.

Preferably, the pin shaft is sleeved with a torsion spring, and two ends of the torsion spring are fixedly connected with the threaded sleeve and the vision screen body respectively.

Has the advantages that:

1. the rotary rod is driven to rotate by rotating the knob, and the screw rod is driven to rotate by the meshing action between the first gear and the second gear, so that the vision screen body is driven to move through the threaded sleeve, the height of the vision screen body is adjusted, the vision screen body can be rotated at the same time, the angle of the vision screen body is adjusted, and then the vision screen body is fixed by the clamping rod;

2. the setting of arc inserted bar can conveniently be fixed the knob, and torque spring can play certain torsion to the arc inserted bar and support simultaneously, and the stopper can prevent that the screw rod from droing in the thread bush simultaneously, and the spring can play certain elastic support to the kelly simultaneously.

Drawings

Fig. 1 is a schematic structural view of an adjustable vision screen of the present invention;

fig. 2 is a schematic side view of the adjustable rotation rod of the vision screen of the present invention;

fig. 3 is a schematic structural view of a portion a of fig. 1.

In the figure: the visual screen comprises a base 1, a mounting block 2, a screw rod 3, a first gear 4, a second gear 5, a rotating rod 6, a knob 7, a rotating shaft 8, an arc-shaped inserted rod 9, a threaded sleeve 10, a pin shaft 11, a visual screen body 12, a clamping block 13, a clamping rod 14, a limiting block 15, a clamping sleeve 16, a pull rod 17 and a spring 18.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, an adjustable vision screen comprises a base 1, wherein the top of the base 1 is fixedly connected with an installation block 2, a screw 3 is conveniently arranged, a cavity is arranged in the installation block 2, the screw 3 is rotatably connected in the cavity and used for supporting a threaded sleeve 10, a first gear 4 is fixedly sleeved on the screw 3 and used for driving the screw 3 to rotate, a second gear 5 meshed with the first gear 4 is arranged in the cavity and used for driving the first gear 4 to rotate, the second gear 5 is rotatably connected with the inner wall of the cavity through a rotating rod 6, one end of the rotating rod 6 penetrates through the inner wall of the cavity and is fixedly connected with a knob 7 used for driving the rotating rod 6 to rotate;

in this embodiment, one end of the knob 7 is rotatably connected with an arc-shaped insertion rod 9 through a rotating shaft 8 for fixing the knob 7, a plurality of slots corresponding to the arc-shaped insertion rod 9 are arranged on the outer wall of the mounting block 2 in a surrounding manner, a torsion spring is sleeved on the rotating shaft 8, two ends of the torsion spring are respectively fixedly connected with the arc-shaped insertion rod 9 and the knob 7, and the arc-shaped insertion rod 9 is supported with a certain torsion force;

in the embodiment, the top of the screw rod 3 penetrates through the inner wall of the cavity and is in threaded sleeve connection with the threaded sleeve 10 in a sleeved mode to drive the vision screen body 12 to move up and down, the top of the screw rod 3 is fixedly connected with the limiting block 15, the top of the threaded sleeve 10 is rotatably connected with the vision screen body 12 through the pin shaft 11 to play an auxiliary role, the pin shaft 11 is sleeved with the torsion spring, and two ends of the torsion spring are respectively and fixedly connected with the threaded sleeve 10 and the vision screen body 12 to support the vision screen body 12 in a certain torsion mode;

in this embodiment, fixedly connected with fixture block 13 on the outer wall of thread bush 10 for support kelly 14, sliding on fixture block 13 and inserting and being equipped with kelly 14, conveniently fix vision screen body 12, the bottom of vision screen body 12 is equipped with a plurality of draw-in grooves that correspond with kelly 14, the fixed cutting ferrule 16 that has cup jointed in top of kelly 14, the bottom fixedly connected with pull rod 17 of kelly 14, the cover is equipped with spring 18 on the kelly 14, play certain elastic support to kelly 14, the both ends of spring 18 respectively with

cutting ferrule

16 and 13 fixed connection of fixture block.

In this embodiment, drive bull stick 6 through rotating knob 7 and rotate, simultaneously through the meshing effect between first gear 4 and the second gear 5, drive screw rod 3 and rotate to drive visual screen body 12 through thread bush 10 and remove, adjust the height of visual screen body 12, can rotate visual screen body 12 simultaneously, adjust the angle of visual screen body 12, then utilize kelly 14 to fix visual screen body 12.

In this embodiment, the setting of arc inserted bar 9 can conveniently be fixed knob 7, and torque spring can play certain torsion to arc inserted bar 9 and support simultaneously, and stopper 15 can prevent that screw rod 3 from droing in the thread bush 10 simultaneously, and spring 18 can play certain elastic support to kelly 14 simultaneously.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a vision screen convenient to adjust, includes base (1), its characterized in that: the visual display screen is characterized in that the top of the base (1) is fixedly connected with an installation block (2), a cavity is arranged in the installation block (2), a screw rod (3) is connected in the cavity in a rotating mode, a first gear (4) is fixedly sleeved on the screw rod (3), a second gear (5) meshed with the first gear (4) is arranged in the cavity, the second gear (5) is rotatably connected with the inner wall of the cavity through a rotating rod (6), one end of the rotating rod (6) penetrates through the inner wall of the cavity and is fixedly connected with a knob (7), one end of the knob (7) is rotatably connected with an arc inserted rod (9) through a rotating shaft (8), a plurality of inserting grooves corresponding to the arc inserted rod (9) are arranged on the outer wall of the installation block (2) in a surrounding mode, a thread sleeve (10) is sleeved on the top of the screw rod (3) through the inner wall of the cavity in a threaded mode, the top of the thread sleeve (10) is rotatably connected with a visual display screen body (12) through a pin shaft (11), fixedly connected with fixture block (13) on the outer wall of thread bush (10), slide on fixture block (13) and insert and be equipped with kelly (14), the bottom of eyesight screen body (12) is equipped with a plurality of draw-in grooves that correspond with kelly (14).

2. A vision screen as recited in claim 1, wherein: the rotating shaft (8) is sleeved with a torsion spring, and two ends of the torsion spring are fixedly connected with the arc-shaped inserting rod (9) and the knob (7) respectively.

3. A vision screen as recited in claim 1, wherein: the top of the screw rod (3) is fixedly connected with a limiting block (15).

4. A vision screen as recited in claim 1, wherein: the top of the clamping rod (14) is fixedly sleeved with a clamping sleeve (16), and the bottom of the clamping rod (14) is fixedly connected with a pull rod (17).

5. A vision screen as recited in claim 4, wherein: the clamping rod (14) is sleeved with a spring (18), and two ends of the spring (18) are fixedly connected with the clamping sleeve (16) and the clamping block (13) respectively.

6. A vision screen as recited in claim 1, wherein: the hinge pin (11) is sleeved with a torsion spring, and two ends of the torsion spring are fixedly connected with the threaded sleeve (10) and the vision screen body (12) respectively.