CN211180524U - Special projection screen for ideological and political theory teaching - Google Patents
Special projection screen for ideological and political theory teaching Download PDFInfo
- Publication number
- CN211180524U CN211180524U CN201922470200.4U CN201922470200U CN211180524U CN 211180524 U CN211180524 U CN 211180524U CN 201922470200 U CN201922470200 U CN 201922470200U CN 211180524 U CN211180524 U CN 211180524U
- Authority
- CN
- China
- Prior art keywords
- curtain
- ideological
- connecting rods
- projection screen
- cross rod
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model provides a special projection screen of ideological and political theory teaching, includes the rectangle curtain, characterized by: metal pressing edges are respectively arranged on the upper side and the lower side of the curtain; connecting plates are respectively arranged at two ends of the metal blank holder, connecting seats are respectively arranged on the connecting plates, and sleeves are respectively inserted into mounting holes of the connecting seats through clearance fit; two connecting rods are respectively inserted between two corresponding sleeves, and the opposite ends of the two connecting rods are detachably connected with each other through connecting pieces and are used for connecting and supporting metal press edges at two sides of the curtain; a cross rod is detachably connected between the connecting pieces at the opposite ends of the two connecting rods and is used for connecting and supporting the connecting rods at the two ends of the cross rod. The beneficial effects are that: the winding process is quick and convenient, the weight of the curtain is light and convenient to carry, and the use and the movement are convenient and quick; connect easy dismounting is swift, need not with the help of any instrument, and each connecting piece volume is less, and occupation space is few, portable and place.
Description
Technical Field
The utility model relates to a projection technology field, more specifically the theory that says so especially relates to a special projection screen of ideological and political theory teaching.
Background
The projection screen is an essential tool in projection imaging, and is mostly used in places such as school teaching and company meeting rooms, so that the teaching, company training and other works are facilitated. Especially when the ideological and political theory teaching is professured, the teacher often adopts the multimedia to give lessons, and current projecting apparatus is fixed at the middle part of the ceiling in the classroom usually, sets up a barrel in the top of teaching blackboard, has the curtain through the spool winding in the barrel. When the curtain is used, the curtain is pulled out downwards from the cylinder and fixed to the lower end of the blackboard, so that the normal use of the blackboard is influenced in the course of teaching; and the position is fixed, and the mobile and portable are not convenient enough, so the utility model is not convenient to use.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a simple structure uses, removes and convenient to carry's the special projection screen of ideological and political theory teaching.
The technical scheme of the utility model as follows:
the utility model provides a special projection screen of ideological and political theory teaching, includes the rectangle curtain, its special character is: metal pressing edges are respectively arranged on the upper side and the lower side of the curtain;
connecting plates are respectively arranged at two ends of the metal blank holder, connecting seats are respectively arranged on the connecting plates, and sleeves are respectively inserted into mounting holes of the connecting seats through clearance fit; two connecting rods are respectively inserted between two corresponding sleeves, and the opposite ends of the two connecting rods are detachably connected with each other through connecting pieces and are used for connecting and supporting metal press edges at two sides of the curtain;
a cross rod is detachably connected between the connecting pieces at the opposite ends of the two connecting rods and is used for connecting and supporting the connecting rods at the two ends of the cross rod.
Preferably, the center of the sleeve is provided with a blind hole for inserting a connecting rod; the outer edge of the sleeve is respectively provided with an annular groove near the two ends of the sleeve, a ball plunger is arranged on the connecting seat along the radial direction, and a steel ball of the ball plunger protrudes out of the inner wall of the mounting hole of the connecting seat and is clamped into the corresponding annular groove; when the outer end of the sleeve is withdrawn from the outer side of the connecting seat, the steel ball of the ball plunger is clamped into the other annular groove.
Preferably, the connecting member is T-shaped, three ends of the connecting member are respectively provided with an external threaded column, and opposite ends of the two connecting rods and two ends of the cross rod are respectively in threaded connection with the corresponding external threaded columns on the connecting member through connecting nuts.
Preferably, the opposite ends of the two connecting rods and the two ends of the cross rod are respectively provided with an annular boss for being clamped in a stepped hole at the inner end of the connecting nut to limit the connecting nut.
Preferably, the metal edge is provided with a strip-shaped groove along the longitudinal direction thereof, and the upper and lower side edges of the curtain are respectively inserted into and pressed in the strip-shaped groove.
Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:
1. because the upper and lower both sides at the curtain are provided with the metal blank pressing respectively, the metal blank pressing both ends of both sides have the sleeve and can dismantle two connecting rod interconnect of connection through using the connecting piece respectively through the connecting seat cartridge and form a detachable braced frame, when this projection screen does not use, can be convenient dismantle behind the connecting rod from having the metal blank pressing one side with this curtain rolling, the rolling process is convenient fast, and curtain weight is light in carrying, uses to remove convenient and fast.
2. Because two connecting rods are respectively inserted between the two sleeves which correspond to each other, the opposite ends of the two connecting rods are detachably connected with each other through the connecting pieces, and the cross rods are detachably connected between the connecting pieces at the opposite ends of the two connecting rods, the structure is simple, the connection and the disassembly are convenient and quick, no tool is needed, the size of each connecting piece is small, the occupied space is small, and the carrying and the placement are convenient.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the connecting member of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 1;
fig. 4 is a cross-sectional view of the connection rod and the sleeve of the present invention.
In the figure: curtain 1, connecting rod 2, connecting plate 3, connecting seat 4, sleeve 5, blind hole 501, annular groove 502, metal blank holder 6, through-hole 601, horizontal pole 7, connecting piece 8, coupling nut 9, bulb plunger 10.
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.
As shown in fig. 1 to 4, the projection screen for ideological and political theory teaching of the present invention comprises a rectangular screen 1, wherein metal pressing edges 6 are fixed on the upper and lower sides of the screen 1; and a strip-shaped groove is arranged on one side of the metal edge pressing 6 along the longitudinal direction of the metal edge pressing, and the edges of the upper side and the lower side of the curtain 1 are respectively inserted into and pressed in the strip-shaped groove. Two through holes 601 are symmetrically arranged on two sides of the middle part of the metal edge 6 so as to hang the projection screen.
The two ends of the metal pressing edge 6 are respectively adhered with the connecting plates 3, the connecting plates 3 are respectively provided with a connecting seat 4 which is integrated with the connecting plates 3, the connecting seats 4 are respectively provided with a mounting hole, the mounting holes are through holes, sleeves 5 are respectively inserted in the mounting holes through clearance fit, and the sleeves 5 at the two ends of the metal pressing edge 6 on one side of the curtain 1 are respectively in one-to-one correspondence with the axes of the sleeves 5 at the two ends of the metal pressing edge 6 on the other side.
A group of two connecting rods 2 which are connected with each other are respectively inserted between two corresponding sleeves 5, and the opposite ends of the two connecting rods 2 are detachably connected with each other through a connecting piece 8 and are used for connecting and supporting metal press edges 6 at two sides of the curtain 1.
A blind hole 501 for inserting the connecting rod 2 is formed in the center of the sleeve 5, annular grooves 502 are formed in the outer edge of the sleeve 5 close to the two ends of the sleeve, a ball plunger 10 is installed on the connecting seat 4 in the radial direction through threads, and steel balls of the ball plunger 10 protrude out of the inner wall of the installation hole of the connecting seat 4 and are clamped into the corresponding annular grooves 502; when the outer end of the sleeve 5 is withdrawn from the outer side of the connecting seat 4, the steel ball of the ball plunger 10 is clamped into the other annular groove 502.
A cross bar 7 is detachably connected between the connecting pieces 8 at the opposite ends of the two connecting rods 2 for connecting and supporting the connecting rods 2 at the two ends of the cross bar 7. The connecting piece 8 is T-shaped, external thread columns are respectively arranged at three ends of the connecting piece, and the opposite ends of the two connecting rods 2 and the two ends of the cross rod 7 are respectively in threaded connection with the corresponding external thread columns on the connecting piece 8 through connecting nuts 9.
The opposite ends of each group of two connecting rods 2 and the two ends of the cross rod 7 are respectively provided with an annular boss, and the connecting nut 9 is clamped on the annular bosses through stepped holes at the inner ends of the connecting nut 9 for realizing the limiting of the connecting nut 9.
When the curtain is used, the curtain 1 is stretched, then the opposite ends of each group of two connecting rods 2 are coaxially connected through the connecting piece 8, the two groups of connecting rods 2 are respectively placed between the two corresponding sleeves 5, the sleeves 5 are respectively pushed inwards along the mounting holes on the connecting seat 4 until the sleeves are sleeved at the outer ends of the corresponding connecting rods 2, and at the moment, the steel balls of the ball plunger 10 are clamped into the corresponding annular grooves to realize limiting; and then the cross rod 7 is placed between the two groups of connecting rods 2, and two ends of the cross rod 7 are respectively connected with the connecting pieces 8 between the two groups of connecting rods through nuts. Finally, a suspension rope is penetrated into the through hole of the metal pressing edge 6 on one side, and the projection screen is hung on a fixed frame or a wall for use.
While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.
Claims (5)
1. The utility model provides a special projection screen of ideological and political theory teaching, includes the rectangle curtain, characterized by: metal pressing edges are respectively arranged on the upper side and the lower side of the curtain;
connecting plates are respectively arranged at two ends of the metal blank holder, connecting seats are respectively arranged on the connecting plates, and sleeves are respectively inserted into mounting holes of the connecting seats through clearance fit; two connecting rods are respectively inserted between two corresponding sleeves, and the opposite ends of the two connecting rods are detachably connected with each other through connecting pieces and are used for connecting and supporting metal press edges at two sides of the curtain;
a cross rod is detachably connected between the connecting pieces at the opposite ends of the two connecting rods and is used for connecting and supporting the connecting rods at the two ends of the cross rod.
2. The projection screen special for ideological and political theory teaching of claim 1, wherein: the center of the sleeve is provided with a blind hole for inserting a connecting rod; the outer edge of the sleeve is respectively provided with an annular groove near the two ends of the sleeve, a ball plunger is arranged on the connecting seat along the radial direction, and a steel ball of the ball plunger protrudes out of the inner wall of the mounting hole of the connecting seat and is clamped into the corresponding annular groove; when the outer end of the sleeve is withdrawn from the outer side of the connecting seat, the steel ball of the ball plunger is clamped into the other annular groove.
3. The projection screen special for ideological and political theory teaching of claim 1, wherein: the connecting piece is T-shaped, external threaded columns are arranged at three ends of the connecting piece respectively, and the opposite ends of the two connecting rods and the two ends of the cross rod are connected with the corresponding external threaded columns on the connecting piece through connecting nuts respectively through threads.
4. The projection screen special for ideological and political theory teaching of claim 3, wherein: the opposite ends of the two connecting rods and the two ends of the cross rod are respectively provided with an annular boss which is used for being clamped in a stepped hole at the inner end of the connecting nut to realize the limiting of the connecting nut.
5. The projection screen special for ideological and political theory teaching of claim 1, wherein: the metal pressing edge is provided with a strip-shaped groove along the longitudinal direction, and the edges of the upper side and the lower side of the curtain are respectively inserted into and pressed in the strip-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922470200.4U CN211180524U (en) | 2019-12-31 | 2019-12-31 | Special projection screen for ideological and political theory teaching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922470200.4U CN211180524U (en) | 2019-12-31 | 2019-12-31 | Special projection screen for ideological and political theory teaching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211180524U true CN211180524U (en) | 2020-08-04 |
Family
ID=71807407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922470200.4U Expired - Fee Related CN211180524U (en) | 2019-12-31 | 2019-12-31 | Special projection screen for ideological and political theory teaching |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211180524U (en) |
-
2019
- 2019-12-31 CN CN201922470200.4U patent/CN211180524U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200804 Termination date: 20201231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |