CN110451356A - A kind of computer teaching projection screen wrap-up - Google Patents

Abstract

The invention discloses a projection screen rolling device for computer teaching. It includes a winding assembly for winding up the screen and a cleaning assembly for cleaning the screen that cooperates with the winding assembly. The winding assembly includes a winding shaft, and is installed on the winding shaft for cleaning The winding reel and the driving gear installed on the winding shaft, the cleaning assembly includes the rotating shaft, the brush cylinder installed on the rotating shaft and the driven gear, the winding shaft and the rotating shaft are arranged in parallel and can make the brush cylinder The brush on the screen cleans the surface of the curtain, and one end of the winding shaft is connected to a driving motor, and the driving gear and the driven gear mesh with each other, so that the brush cylinder and the reel can rotate synchronously. Its advantages are: convenient and fast maintenance and replacement; convenient cleaning, while cleaning, the brush cylinders in different directions can be rotated to smooth out possible wrinkles on the surface of the screen, making the use cleaner and the winding more smooth and stable.

Description

A projection screen rolling device for computer teaching

technical field

The invention relates to a device for computer teaching, in particular to a projection screen rolling device for computer teaching.

Background technique

In the daily computer teaching process, it is essential to use a screen as a projection screen. In the prior art, the commonly used screens are driven by motors. There is a lot of dust, and it is inevitable that there will be problems such as wrinkles during use. In order to keep the surface of the screen clean, when the screen is used, it can only be cleaned manually during the rolling of the projection screen. Of course, in order to avoid this For complex operations, there are also a small number of devices that add a row of brushes at the entrance of the roll cloth. However, this method is simple and crude, and the cleaning effect is not good. Moreover, after long-term use, the inspection and maintenance of the screen is not convenient enough, which reduces the experience of using the device.

Contents of the invention

The technical problem to be solved by the present invention is to provide a projection screen roll-up device for computer teaching, which has good cleaning effect, simple and convenient maintenance and replacement, and can ensure the smoothness and stability of the screen.

In order to solve the above-mentioned technical problems, the projection screen rolling device for computer teaching of the present invention includes a winding assembly for winding the screen and a cleaning assembly for cleaning the screen coordinated with the winding assembly, the winding assembly It includes a winding shaft, a reel for winding the curtain installed on the winding shaft, and a driving gear installed on the winding shaft. The cleaning assembly includes a rotating shaft, a brush cylinder installed on the rotating shaft, and a The driving gear, the winding shaft and the rotating shaft are arranged in parallel to enable the brush on the brush cylinder to clean the surface of the curtain. One end of the winding shaft is connected to a driving motor, and the driving gear and the driven gear are meshed with each other. The brush cylinder and the reel can be rotated synchronously.

There are two groups of cleaning assemblies, and the two groups of cleaning assemblies are arranged in parallel below the winding assembly.

The winding assembly and the cleaning assembly are installed in a casing, the winding shaft and the rotating shaft are horizontally installed in the casing through bearings, and the driving motor is fixedly installed on the casing.

The reel is socketed and fixedly arranged on the rewinding shaft, limit baffles are symmetrically arranged at both ends of the reel, the driving gear is fixedly installed on the rewinding shaft and is located outside the reel, and the brush The cylinder is socketed and fixedly arranged on the rotating shaft, and the driven gear is fixedly installed on the rotating shaft and is located outside the brush cylinder.

The middle part of the lower end of the housing is provided with an opening through which the curtain can pass, and the opening is located between the two brush cylinders of the two groups of cleaning assemblies.

An inspection cover is installed on the top of the housing.

The driving motor adopts a Mitsubishi servo motor, and the driving motor is fixedly installed on the outside of the housing through a mounting seat, and the output shaft of the driving motor passes through the side wall of the housing and is fixedly installed on the winding shaft.

The driving motor is provided with a protective cover, and the end of the protective cover is fixedly connected to the outer side of the housing through fasteners. The right side of the protective cover is uniformly distributed with multiple groups of cooling holes.

The reel is provided with a card slot, and the relative inner sides of the limit baffles on both sides are symmetrically and vertically provided with sliding slots matched with the card slot, and a card bar is installed on the card slot, and the two ends of the card bar are respectively Extending into the sliding grooves on both sides, a spring is arranged between the upper two ends of the clamping strip and the inner upper wall of the sliding groove, and the upper end of the curtain is installed between the clamping groove and the clamping strip.

The curtain passes between the two brush cylinders of the two groups of cleaning components and protrudes out of the opening. A metal rod is fixedly installed on the lower edge of the curtain, and a circular ring is arranged at the middle part of the lower end of the metal rod.

The advantages of the present invention are:

1. The upper end of the curtain is pressed together by the clamp strip and the clamp slot, so that the spring presses the clamp strip and fits the clamp slot when in use, so that the upper end of the curtain is not easy to fall off, and the clamp strip is pulled upward during maintenance, and the spring is gradually compressed, and the screen can be moved The upper end of the curtain is taken out from between the clamp strip and the clamp slot, which is convenient and quick for maintenance and replacement;

2. Use the driving motor to drive the winding shaft to rotate, and the screen wrapped around the reel can be rolled up or down according to the rotation direction driven by the driving motor, and when the screen is rolled up or down, the driving gear and the winding shaft rotate synchronously , the driving gear and the driven gear are meshed for transmission, and the rotation of the driven gear can drive the rotating shaft and the brush tube around the rotating shaft to rotate, so that the brush tube can be located on both sides of the curtain and clean it, while cleaning, The possible wrinkles on the surface of the curtain can be smoothed by rotating the brush cylinder in different directions, making the use cleaner and the winding more smooth and stable.

Description of drawings

Fig. 1 is the structural representation of the projection screen rolling device for computer teaching of the present invention;

Fig. 2 is a schematic diagram of the A-A section structure of Fig. 1;

Fig. 3 is a schematic structural view of the reel in the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Figures 1-2, the computer teaching projection screen roll-up device of this embodiment includes a roll-up assembly for rolling up the screen and a cleaning assembly for cleaning the screen that cooperates with the roll-up assembly. The roll assembly and the cleaning assembly are installed in a housing 1, and the roll assembly includes a roll-up shaft 3, a reel 4 mounted on the roll-up shaft for winding the curtain 6, and an active drive mounted on the roll-up shaft. The gear 5, specifically, the reel 4 is sleeved and fixedly arranged on the rewinding shaft 3, the two ends of the reel 4 are symmetrically provided with limit baffles 41, the curtain 6 is wound around the periphery of the reel 4, and the driving gear 5 is fixedly installed on the On the winding shaft 3 and outside the reel 4, the cleaning assembly includes a rotating shaft 8, a brush tube 10 mounted on the rotating shaft and a driven gear 9. Specifically, the brush tube 10 is sleeved and fixedly arranged to rotate On the shaft 8, the driven gear 9 is fixedly installed on the rotating shaft 8 and is located outside the brush cylinder 10. The winding shaft 3 and the rotating shaft 8 are installed in the housing 1 through the horizontal rotation of the bearing, and the winding shaft 3 and the rotating shaft The shaft 8 is arranged in parallel and enables the brush on the brush cylinder 10 to clean the surface of the curtain 6. The right side end of the winding shaft 3 is connected with a drive motor 11 fixedly installed on the housing. The drive motor 11 adopts a Mitsubishi servo Motor MR-J3 series, the drive motor 11 is riveted and fixedly installed on the right side of the casing through the mounting base, the output shaft of the drive motor 11 moves through the right side wall of the casing and is welded and fixedly installed on the right end of the winding shaft 3, the drive motor The control line of 11 is connected to the standing power supply in the building, and the driving motor 11 drives the winding shaft 3 to rotate synchronously, and the driving gear 5 and the driven gear 9 mesh with each other, so that the brush cylinder 10 and the reel 4 can rotate synchronously A protective cover 12 is arranged outside the driving motor 11, and the end of the protective cover 12 is fixedly connected to the right side wall of the housing by riveting. The middle part of the lower end of 1 is horizontally provided with an opening 7 through which the curtain can pass. The length of the opening 7 is equivalent to the length of the reel 4. The curtain 6 passes through the brush cylinder 10 downward and passes through the opening 7. The lower edge of the curtain 6 is sewn with a metal Rod 61, the middle part of the lower end of the metal rod 61 is welded with a ring 62.

Embodiment two:

Please refer to Figures 1-2, the computer teaching projection screen roll-up device of this embodiment includes a roll-up assembly for rolling up the screen and a cleaning assembly for cleaning the screen that cooperates with the roll-up assembly. The roll assembly and the cleaning assembly are installed in a casing 1, and the top of the casing 1 is fixedly installed with an inspection cover 2 by riveting. The winding reel 4 and the driving gear 5 installed on the rewinding shaft can be seen from the figure, the reel 4 is sleeved and fixedly arranged on the periphery of the rewinding shaft 3, and the two ends of the reel 4 are symmetrically welded and provided with limit baffles 41 , the winding shaft 3 drives the reel 4 to rotate synchronously, the driving gear 5 is welded and fixed on the periphery of the rewinding shaft 3 and is located on the left side of the reel 4, and the cleaning assembly includes a rotating shaft 8 and a brush cylinder 10 mounted on the rotating shaft And the driven gear 9, as can be seen from the figure, the brush tube 10 is sleeved and fixedly arranged on the periphery of the rotating shaft 8, the driven gear 9 is welded and arranged on the periphery of the rotating shaft 8 and is located on the left side of the brush tube 10, and the cleaning assembly is provided with two groups Two groups of cleaning assemblies are arranged in parallel below the winding assembly, and the winding shaft 3 and the rotating shaft 8 are arranged in parallel to enable the brush on the brush cylinder 10 to clean the surface of the curtain 6. As can be seen from the figure, the winding shaft 3 The two rotating shafts 8 are arranged in the shape of "pin" at the same distance. One end of the winding rotating shaft 3 is connected to a driving motor 11 fixedly installed on the housing. The driving gear 5 and the driven gear 9 cooperate with each other and Mesh transmission, so that the brush tube 10 and the reel 4 can rotate synchronously. The radius of the driving gear 5 is 1.3 times the radius of the driven gear 9. The bristles on the brush tubes 10 on both sides correspond to the movable fit. The lower end of the housing 1 The middle part is horizontally provided with an opening 7 that allows the curtain to pass through. The length of the opening 7 is equivalent to the length of the roll 4. The opening 7 is located between the two brush cylinders 10 of the two groups of cleaning assemblies. The curtain 6 passes through the two brushes of the two groups of cleaning assemblies. Between the brush cylinders 10 and out of the opening 7, in order to improve the daily maintenance and replacement efficiency of the curtain 6 and improve the stability in use, on the basis of Embodiment 1, the upper end of the reel 4 is horizontally embedded with a card. Slot 42, the opposite inside of the limit baffle plate 41 on both sides is symmetrically vertically embedded with a sliding groove 43 that cooperates with the card groove 42, the two ends of the sliding groove 43 and the card groove 42 are aligned, and a card bar 44 is installed on the card groove 42. The clip bar 44 is composed of a horizontal bar on the upper side and a rubber bead on the lower side. The bead and the draw-in groove 42 are movably connected by clearance fit, a spring 45 is arranged between the upper two ends of the draw-in bar 44 and the inner upper wall of the sliding groove 43, and the upper end of the curtain 6 is installed between the draw-in groove 42 and the draw-in bar 44, The upper end of the curtain 6 is pressed tightly through the rubber bead and the draw-in groove 42 through clearance fit.

Its working principle is:

When in use, the upper end of the curtain 6 is pressed together by the clamping strip 44 and the clamping groove 42, so that the spring 45 presses the clamping strip 44 to cooperate with the clamping groove 42 during use, so that the upper end of the curtain 6 is not easy to fall off, and the clamping strip 44 is pulled up during maintenance. , the spring 45 is gradually compressed, and the upper end of the curtain 6 can be taken out from between the clamp strip 44 and the draw-in groove 42, and the maintenance and replacement are convenient and fast. It can be rolled up or put down according to the direction of rotation driven by the driving motor 11, and when the curtain 6 is rolled up or put down, the driving gear 5 and the winding shaft 3 rotate synchronously, the driving gear 5 and the driven gear 9 are meshed for transmission, and the driven gear 5 and the driven gear 9 are meshed for transmission. The rotation of the gear 9 can drive the rotating shaft 8 and the brush tube 10 on the periphery of the rotating shaft 8 to rotate, so that the brush tube 10 can be respectively located on both sides of the curtain 6 and clean it. The brush cylinder 10 rotates to smooth out possible wrinkles on the surface of the curtain 6, making it cleaner to use and smoother and more stable to wind.

The standard parts used in the present invention can be purchased from the market, and the special-shaped parts can be customized according to the instructions and the records of the accompanying drawings. The specific connection methods of each part adopt mature bolts, rivets, welding, etc. in the prior art. Conventional means, machinery, parts and equipment all adopt conventional models in the prior art, plus circuit connections adopt conventional connection methods in the prior art, and will not be described in detail here.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

In addition, it should be understood that although this specification is described according to implementation modes, not each implementation mode only includes an independent technical solution, and this description in the specification is only for clarity, and those skilled in the art should take the specification as a whole , the technical solutions in the various embodiments can also be properly combined to form other implementations that can be understood by those skilled in the art.

Claims (10)

1. a kind of computer teaching projection screen wrap-up, it is characterised in that: including the receipts for being wound to curtain Wound module and in winding component cooperation for carrying out clean cleaning assemblies to curtain, the winding component includes winding turn Axis (3) is mounted on the reel (4) for being used to wind curtain (6) wound in shaft and is mounted in winding shaft Driving gear (5), the cleaning assemblies include rotation axis (8), the brush tube (10) and driven gear of installation on the rotating shaft (9), winding shaft (3) and the rotation axis (8) are arranged in parallel and the hairbrush on brush tube (10) can be made to curtain (6) Surface is cleaned, and one end of winding shaft (3) is connected with a driving motor (11), the driving gear (5) and from Moving gear is intermeshed between (9), so as to rotate synchronously brush tube (10) and reel (4).

2. computer teaching described in accordance with the claim 1 projection screen wrap-up, it is characterised in that: the cleaning assemblies Two groups are provided with, two groups of cleaning assemblies are arranged in parallel in the lower section of winding component.

3. computer teaching according to claim 1 or 2 projection screen wrap-up, it is characterised in that: the winding Component and cleaning assemblies are mounted in a shell (1), and the winding shaft (3) and rotation axis (8) are turned by bearing level Dynamic to be mounted in shell (1), the driving motor is fixedly mounted on shell.

4. computer teaching described in accordance with the claim 3 projection screen wrap-up, it is characterised in that: the reel (4) Setting is sleeved and fixed in winding shaft (3), the both ends of the reel (4) are symmetrically arranged with postive stop baffle (41), the active Gear (5) is fixedly mounted on the outside in winding shaft (3) and being located at reel (4), and the brush tube (10) is sleeved and fixed setting On rotation axis (8), the driven gear (9) is fixedly mounted on the outside on rotation axis (8) and being located at brush tube (10).

5. according to computer teaching projection screen wrap-up described in claim 1,2 or 4, it is characterised in that: the shell It is provided with the opening (7) that curtain can be made to pass through in the middle part of the lower end of body (1), the opening (7) is located at the two of two groups of cleaning assemblies Between a brush tube (10).

6. computer teaching projection screen wrap-up according to claim 5, it is characterised in that: the shell (1) Top access cover (2) are installed.

7. according to computer teaching projection screen wrap-up described in claim 1,2,4 or 6, it is characterised in that: described Driving motor (11) uses Mitsubishi's servo motor, and the driving motor (11) is fixedly mounted on the outside of shell by mounting base, The output shaft of the driving motor (11) passes through the side wall of shell and winding shaft (3) is fixedly mounted.

8. computer teaching projection screen wrap-up according to claim 7, it is characterised in that: the driving motor (11) it is provided with protective cover (12) outside, protective cover (12) end is fixedly connected on the outside of shell by fastener, described The right side of protective cover (12), which is uniformly run through, is distributed with multiple groups heat release hole (13).

9. according to computer teaching projection screen wrap-up described in claim 1,2,4,6 or 8, it is characterised in that: institute It states and is provided on reel (4) card slot (42), the relative inner Symmetrical vertical of the postive stop baffle (41) of two sides is provided with and card slot (42) sliding groove (43) cooperated is equipped with strip (44) on the card slot (42), and the both ends of the strip (44) are respectively protruding into In the sliding groove (43) of two sides, spring is provided between the upside both ends of the strip (44) and the interior upper wall of sliding groove (43) (45), the upper end of the curtain (6) is mounted between the card slot (42) and strip (44).

10. computer teaching projection screen wrap-up according to claim 9, it is characterised in that: the curtain (6) By between two brush tubes (10) of two groups of cleaning assemblies and stretching out opening (7) outside, the fixed peace of curtain (6) lower edge Equipped with metallic rod (61), annulus (62) are provided in the middle part of the lower end of the metallic rod (61).