CN217133531U - Limiting stopper of rotating tube type projection screen - Google Patents

Abstract

The utility model discloses a limiter of a rotary tube type projection screen, which belongs to the field of the projection screen limiter, and comprises a front seat, wherein the outer end of the front seat is fixedly connected with a middle seat, one end of the middle seat far away from the front seat is fixedly connected with a rear seat, the outer end of the middle seat is sleeved with a plurality of front turntables and rear turntables which are evenly distributed, the front turntables and the rear turntables are respectively positioned between the front seat and the rear seat, steel balls are arranged between the inner walls of the front turntables and the rear turntables, one ends of the rear turntables close to the front turntables are provided with limit nails, one ends of the front turntables and the rear turntables close to each other are provided with hemispherical grooves, the steel balls are rotationally connected with the hemispherical grooves, the inner walls of the front seat and the rear seat are respectively fixedly connected with sealing rings, the surfaces of the steel balls are provided with polishing layers, the surfaces of the lubricating oil is coated on the surfaces, the rotation of the whole limiter is limited by the number of the turntables, so as to achieve the function of limiting the rotation number of the rotary tubes of the projection screen, the size of the projection screen is controlled.

Description

Limiting stopper of rotating tube type projection screen

Technical Field

The utility model relates to a projection curtain stopper field, more specifically say, relate to a stopper of commentaries on classics pipe type projection curtain.

Background

The projection screen is one of the most frequently used products in the peripheral equipment of the projector, and the projection screen is the abbreviation of the projection screen; if the projection screen is properly matched with the projector, a high-quality projection effect can be obtained, and the projection screen can be generally divided into a reflection type and a transmission type; reflective for front projection and transmissive for rear projection; the positive projection screen is divided into a plane screen and an arc screen; the flat screen may be classified into a bead screen, a metal screen, an embossed plastic screen, an elastic screen, etc. in terms of texture (embossed plastics are classified into white plastics, gray plastics, silver plastics, etc.).

At present, in the use process of a projection screen, the screen needs to be put on walls at each position, and under some special conditions, the walls are too narrow or not high enough, and a rotary pipe of the projection screen can not stop in the rotating process and can only be completely retracted to the end, so that projection can not be carried out under the condition.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved

To the problem that exists among the prior art, the utility model aims to provide a stopper of commentaries on classics pipe type projection curtain can realize that the rotation of whole stopper is restricted by carousel quantity to reach the rotation number of turns function of restriction projection curtain commentaries on classics pipe, with obtaining controlling of the size of projection curtain.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

The utility model provides a stopper of commentaries on classics pipe type projection curtain, includes the front bezel, seat in the front bezel outer end fixedly connected with, the one end fixedly connected with back seat of front bezel is kept away from to well seat, well seat outer end cover is equipped with a plurality of evenly distributed's preceding carousel and back carousel, preceding carousel and back carousel all are located between front bezel and the back seat, be equipped with the steel ball between preceding carousel and the back carousel inner wall, the back carousel is close to the one end of preceding carousel and installs the banking pin, can realize that the rotation of whole stopper is restricted by carousel quantity to reach restriction projection curtain commentaries on classics pipe and rotate the number of turns function, with the obtaining control of the size of projection curtain.

Further, the one end that preceding carousel and back carousel are close to each other all cuts there is the hemisphere groove, the steel ball rotates with the hemisphere groove to be connected, through setting up the hemisphere groove, can make the steel ball more smooth of pivoted between carousel and the back carousel in the front, also improves the rotation efficiency between carousel and the back carousel before.

Furthermore, the inner walls of the front seat and the rear seat are fixedly connected with sealing rings, and by arranging the sealing rings, dust impurities can be prevented from entering gaps among the front seat, the rear seat and the connecting piece, so that the phenomenon that the rotation is not smooth due to blockage is caused.

Further, the steel ball surface is equipped with polishing layer, and the surface coating has lubricating oil, through setting up polishing layer and lubricating oil, can make preceding carousel and back carousel pivoted more smooth under the effect of steel ball to the rotation of restriction projection curtain commentaries on classics pipe that can be more quick.

Furthermore, the rotation of the middle seat is limited by the number of the front rotary disc and the rear rotary disc, and the limit nails are arranged on each front rotary disc and each rear rotary disc, so that the rotation between each front rotary disc and each rear rotary disc can be limited only by one circle, and the phenomenon of rotation cannot occur, and the function of limiting the number of rotation circles of the projection screen rotating tube is achieved.

3. Advantageous effects

Compared with the prior art, the utility model has the advantages of:

(1) this scheme can realize that the rotation of whole stopper is restricted by carousel quantity to reach the rotation number of turns function of restriction projection curtain rotating-barrel, with obtaining control of the size of projection curtain.

(2) Preceding carousel all cuts with the one end that the back carousel is close to each other and has dug the hemisphere groove, and the steel ball rotates with the hemisphere groove to be connected, through setting up the hemisphere groove, can make the steel ball in the front carousel and the back carousel between the pivoted more smooth, also improves the rotation efficiency between preceding carousel and the back carousel.

(3) The sealing rings are fixedly connected to the inner walls of the front seat and the rear seat, and dust impurities can be prevented from entering gaps among the front seat, the rear seat and the connecting piece by the aid of the sealing rings, so that the phenomenon that the front seat, the rear seat and the connecting piece are blocked to cause unsmooth rotation can be avoided.

(4) The steel ball surface is equipped with polishing layer, and the surface coating has lubricating oil, through setting up polishing layer and lubricating oil, can make preceding carousel and back carousel more smooth under the effect of steel ball pivoted to restriction projection curtain changes the rotation of pipe more quickly.

(5) The rotation of well seat is restricted by preceding carousel and back carousel quantity, because of all being equipped with the spacing nail on every preceding carousel and the back carousel to cause and to rotate the round between every preceding carousel and the back carousel and will be spacing, thereby can't take place pivoted phenomenon, in order to reach the restriction projection screen rotating tube and rotate the round function.

Drawings

FIG. 1 is a schematic view of the overall three-dimensional structure of the present invention;

FIG. 2 is a schematic view of the overall exploded perspective structure of the present invention;

FIG. 3 is a schematic view of the overall cross-sectional structure of the present invention;

fig. 4 is an enlarged view of a portion a in fig. 3 according to the present invention.

The reference numbers in the figures illustrate:

1 front seat, 2 front turntables, 3 rear turntables, 4 steel balls, 5 middle seats, 6 rear seats and 7 limit nails.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 1-4, a limiter for a rotary tube type projection screen comprises a front seat, a middle seat 5 is fixedly connected to the outer end of the front seat 1, a rear seat 6 is fixedly connected to one end, far away from the front seat 1, of the middle seat 5, a plurality of front rotary discs 2 and rear rotary discs 3 are sleeved on the outer end of the middle seat 5, the front rotary discs 2 and the rear rotary discs 3 are uniformly distributed, the front rotary discs 2 and the rear rotary discs 3 are located between the front seat 1 and the rear seat 6, steel balls 4 are arranged between the inner walls of the front rotary discs 2 and the inner walls of the rear rotary discs 3, and limit pins 7 are installed at one ends, close to the front rotary discs 3, of the rear rotary discs 2, so that the rotation of the whole limiter is limited by the number of the rotary discs, the function of limiting the number of rotation turns of the rotary tube of the projection screen is achieved, and the size of the projection screen is controlled.

Referring to fig. 1-4, a hemispherical groove is drilled at one end of the front turntable 2, which is close to the rear turntable 3, the steel balls 4 are rotatably connected with the hemispherical groove, the rotation efficiency between the front turntable 2 and the rear turntable 3 is improved by the hemispherical groove, the inner walls of the front seat and the rear seat are fixedly connected with a sealing ring, the sealing ring is arranged to prevent dust and impurities from entering gaps between the front seat, the rear seat and the connecting piece, so that the blockage is caused and the rotation is not smooth, a polishing layer is arranged on the surface of the steel balls, the surface of the steel balls is coated with lubricating oil, the rotation of the front turntable and the rear turntable under the action of the steel balls is more smooth by the polishing layer and the lubricating oil, the rotation of the projection screen rotating tube can be more quickly limited, the rotation of the middle seat 5 is limited by the number of the front turntable 2 and the rear turntable 3, because of all being equipped with spacing nail 7 on every preceding carousel 2 and the back carousel 3 to cause and to rotate between every preceding carousel 2 and the back carousel 3 can only the round and will be spacing, thereby can't take place pivoted phenomenon, in order to reach the restriction projection curtain and change the pipe and rotate the number of turns function.

The utility model discloses in, current seat 1, well seat 5, 6 interconnects together of back seat, and the centre accompanies preceding carousel 2 respectively, back carousel 3, steel ball 4, and when the projection curtain runner began to rotate, can make preceding carousel 2 and back carousel 3 can make a round trip to rotate, and because of all being equipped with stop pin 7 on every carousel, make and can only rotate the round between every carousel thereof, thereby let the rotation of whole stopper restricted by carousel quantity, in order to reach restriction projection curtain runner rotation number of turns function, avoid the projection curtain can only realize opening completely or closed phenomenon completely because of not having under the spacing effect, compare with prior art, the utility model discloses the rotation that can realize whole stopper is restricted by carousel quantity, in order to reach restriction projection curtain runner rotation number of turns function, with the size of projection curtain obtain control.

The above description is only the preferred embodiment of the present invention; the scope of the present invention is not limited thereto. Any person skilled in the art should also be able to cover the technical scope of the present invention by replacing or changing the technical solution and the improvement concept of the present invention with equivalents and modifications within the technical scope of the present invention.

Claims (5)

1. The utility model provides a stopper of commentaries on classics class projection curtain, includes front bezel (1), its characterized in that: seat (5) in preceding seat (1) outer end fixedly connected with, the one end fixedly connected with back seat (6) of preceding seat (1) are kept away from in seat (5), well seat (5) outer pot head is equipped with preceding carousel (2) and back carousel (3) of a plurality of evenly distributed, preceding carousel (2) and back carousel (3) all are located between preceding seat (1) and back seat (6), be equipped with steel ball (4) between preceding carousel (2) and back carousel (3) inner wall, spacing nail (7) are installed to the one end that back carousel (3) are close to preceding carousel (2).

2. The limiting stopper of the rotating-tube type projection screen as claimed in claim 1, wherein: the front rotary table (2) and the rear rotary table (3) are close to each other, a hemispherical groove is formed in one end, and the steel ball (4) is rotatably connected with the hemispherical groove.

3. The limiting stopper of the rotating-tube type projection screen as claimed in claim 1, wherein: the inner walls of the front seat (1) and the rear seat (6) are fixedly connected with sealing rings.

4. The limiting stopper of the rotating-tube type projection screen as claimed in claim 1, wherein: and a polishing layer is arranged on the surface of the steel ball (4), and lubricating oil is coated on the surface of the steel ball.

5. The limiting stopper of the rotating-tube type projection screen as claimed in claim 1, wherein: the rotation of the middle seat (5) is limited by the number of the front rotary disc (2) and the rear rotary disc (3).

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