CN103744261B - A kind of self-locking head structure for screen - Google Patents
A kind of self-locking head structure for screen Download PDFInfo
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- CN103744261B CN103744261B CN201410025520.8A CN201410025520A CN103744261B CN 103744261 B CN103744261 B CN 103744261B CN 201410025520 A CN201410025520 A CN 201410025520A CN 103744261 B CN103744261 B CN 103744261B
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- steel ball
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- rotating shaft
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Abstract
The present invention relates to a kind of self-locking head structure for screen, there is the rotating shaft of screen connecting portion including one end, in rotating shaft, fixed cover is provided with steel ball guide rail, steel ball guide rail has the first track, first track includes the drop-down rail groove and the limit track groove that are positioned at steel ball guide rail outer surface, drop-down rail groove is arranged near screen connecting portion, rotating shaft is rotatably arranged with shell, shell has the movable cavity housing steel ball guide rail, the inwall of cavity is arranged with the second track along the axis direction of rotating shaft, first track and the second track are movably installed with steel ball, shell has the first connecting portion for fixedly mounting screen spring away from one end of screen connecting portion, the other end of rotating shaft runs through and extends shell and forms the second connecting portion.The self-locking head structure for screen of this structure, its structure is unique, it is achieved that the fast self-locking under screen reactive spring force after screen is drop-down, and self-locking stability is relatively strong, thus improve property easy to use, production cost is relatively low simultaneously.
Description
Technical field
The present invention relates to a kind of self-locking head structure for screen, refer specifically to a kind of for realize screen drop-down time fast self-locking self-locking head structure.
Background technology
Screen is commonly used to do the purposes such as teaching demonstration, motion picture projection, development along with society, screen is also developing progressively as one of requisite office appliance of enterprises, and screen product is also progressively towards light, theory development efficiently simultaneously, and automaticity is also more and more higher.
The convenience deposited to meet people's routine use to carry and install, screen product is generally manufactured to rotatably shrink the form of rolling, in use drop-down expansion, forms screen, the screen of this form simultaneously also can reduce accidental injury when not in use, applies relatively broad.Typically requiring for this traditional screen product and use screen spring, screen spring is the critical piece of screen, is the power set that can automatically shrink of screen.
In order to further promote people's convenience in use, generally at the beginning of the design of screen product, just put forward the theory of fast self-locking, namely need to ensure that screen product is when pulling down to the size of demand, due to the existence of the counteracting force of screen spring, the maintenance that the screen of formation can be stable.
For realizing the theory of above-mentioned fast self-locking, the screen product of traditional screen form of springs has often designed manual stopping means, namely manually the form of mechanical position limitation keep screen drop-down after fixing, the mode of this manual locking is comparatively backward undoubtedly, and convenience is poor.Some new screen products are designed to again other multiple self-locking form simultaneously, for instance the self-locking structure of gear forms, but the principle of this self-locking structure is often excessively complicated；The self-locking structure that such as electric motor controls, but the less stable of this self-locking structure.The screen product of these new self-locking structure forms, production cost is generally higher, therefore the screen product of these self-locking forms, is not ideal selection.
Summary of the invention
In order to seek more excellent settling mode, while ensureing convenience demand, the version of tradition screen spring is made further improvement, promotes its convenience, selection best beyond doubt.
It is an object of the invention to overcome above-mentioned problem of the prior art, it is provided that a kind of self-locking head structure for screen, its structure is unique, can realize screen drop-down after fast self-locking under screen reactive spring force, self-locking stability is relatively strong, thus improving property easy to use, production cost is relatively low simultaneously.
Above-mentioned purpose is to be achieved through the following technical solutions:
A kind of self-locking head structure for screen, there is the rotating shaft of screen connecting portion including one end, in described rotating shaft, fixed cover is provided with steel ball guide rail, described steel ball guide rail has the first track, described first track includes the drop-down rail groove and the limit track groove that are positioned at described steel ball guide rail outer surface, described drop-down rail groove is arranged near described screen connecting portion, described rotating shaft is rotatably arranged with shell, described shell has the movable cavity housing described steel ball guide rail, the inwall of described cavity is arranged with the second track along the axis direction of described rotating shaft, described first track and described second track are movably installed with steel ball, described shell has the first connecting portion for fixedly mounting screen spring away from one end of described screen connecting portion, the other end of described rotating shaft runs through and extends described shell and forms the second connecting portion.
Owing to screen adopts the form of spool rolling, being connected for the ease of the spool with screen, described screen connecting portion is square toes.
Shell and the rotating shaft form of being rotatably connected have multiple, and such as two ends all adopt the form of bearing.But in order to save cost and alleviate weight, and also to be easy to the installation of shell, it is preferable that described shell is arranged in described rotating shaft by bearing near one end of described screen connecting portion.
In order to better realize the location and installation of steel ball guide rail, described rotating shaft has installation portion, the connection of steel ball guide rail and installation portion also has more implementation, but the purpose for the ease of removing and installing, described steel ball guide rail is movably set on described installation portion, described steel ball guide rail is fixedly connected with torsion spring away from one end sidepiece of described screen connecting portion by screw, and described torsion spring relies on the reliable fixed cover of self torsion to be located on described installation portion.
Owing to only one end at shell have employed bearing, in order to keep the other end stability when axis of rotation, being close to described installation portion fixed cover in described rotating shaft equipped with pad, simultaneously in order to avoid the motion of rotating shaft interfered by pad, described shell has and the groove of described pad matched in clearance.
In order to ensure the drop-down smoothly of screen, owing to have employed the form of steel ball motion, the design of drop-down rail groove needs the structure relying on self to realize the smooth motion of steel ball, therefore drop-down track needs to optimize further design, preferably, described drop-down rail groove includes continuous connector loop and is wound on two main motion grooves of described steel ball guide rail outer surface, described main motion groove includes the forward arc introduction segment being connected successively along the drop-down direction of motion of described steel ball, the forward section of seamlessly transitting and forward arc derive section, the radian that described forward arc introduction segment and described forward arc derive section is roughly equal and in opposite direction, described screen connecting portion is partial in the radian direction introversion of described forward arc introduction segment.Two main motion grooves are connected the mode of design continuously, and the design fits of the limit track groove of the following stated, contribute to shortening period of motion during steel ball fast self-locking.
In order to realize screen drop-down after fast self-locking under screen reactive spring force, adapt with the design of above-mentioned main motion groove simultaneously, described limit track groove is arranged on the described drop-down rail groove side away from described screen connecting portion, described limit track groove includes main stopper slot corresponding with described main motion groove respectively, described main stopper slot includes the reverse arc introduction segment being mutually linked, reverse changeover portion, screens section, forward is derived section and reverse turns out section, the corresponding described forward arc of the reverse sourcing mouth of described reverse arc introduction segment derives section, described reverse reverse the turning turning out section exports the corresponding described forward section of seamlessly transitting.
In order to ensure motility and the stability that steel ball moves, having gap between the inwall of described steel ball guide rail and described cavity, described second track is semi-circular groove structure, and the groove radius of described second track is slightly larger than the radius of steel ball.
Described first connecting portion is external screw thread.Externally threaded version facilitates implementation the installing/dismounting of screen spring, when mounted, one end of screen spring is fixing with shell to be connected, the other end of screen spring is connected by direct or indirect mode is fixing with the second connecting portion of rotating shaft, thus provide snap back active force when rotating shaft contractile motion, realizing automatically shrinking, when screen spring additionally aids drop-down simultaneously, motion is excessively fierce.
A kind of self-locking head structure for screen of the present invention, there is the rotating shaft of screen connecting portion including one end, in rotating shaft, fixed cover is provided with steel ball guide rail, steel ball guide rail has the first track, first track includes the drop-down rail groove and the limit track groove that are positioned at steel ball guide rail outer surface, drop-down rail groove is arranged near screen connecting portion, rotating shaft is rotatably arranged with shell, shell has the movable cavity housing steel ball guide rail, the inwall of cavity is arranged with the second track along the axis direction of rotating shaft, first track and the second track are movably installed with steel ball, shell has the first connecting portion for fixedly mounting screen spring away from one end of screen connecting portion, the other end of rotating shaft runs through and extends shell and forms the second connecting portion.The self-locking head structure for screen of this structure, its structure is unique, it is achieved that the fast self-locking under screen reactive spring force after screen is drop-down, and self-locking stability is relatively strong, thus improve property easy to use, production cost is relatively low simultaneously.
Accompanying drawing explanation
Fig. 1 is screen schematic diagram in the application in the present invention one specific embodiment；
Fig. 2 is a kind of installation site schematic diagram applied in screen for the self-locking head structure of screen of the present invention；
Fig. 3 is of the present invention a kind of for the axonometric chart in self-locking head structure one specific embodiment of screen；
Fig. 4 is the structural representation of Fig. 3 shaft；
Fig. 5 is the axonometric chart at Fig. 3 housing the first visual angle；
Fig. 6 is the axonometric chart at Fig. 3 housing the second visual angle；
Fig. 7 is the cut-away view after removing shell in Fig. 3；
Fig. 8 is the stereo amplification figure at steel ball guide rail the second visual angle in Fig. 7；
Fig. 9 is the stereo amplification figure at steel ball guide rail the first visual angle in Fig. 7.
Detailed description of the invention
Below according to drawings and Examples, the present invention is described in further detail.
Understanding in order to convenient and set forth the specific embodiment of the present invention, in the downdraw process of screen, being generally understood as and adopt the forward a counterclockwise relatively conventional as shown in Figure 1 mode rotating drop-down screen b, the demonstration audient c of screen is arranged in the left side of Fig. 1 screen b.
Shown in Fig. 2, when demonstrating audient c just to screen b, a kind of self-locking head structure 100 for screen of the present invention is mounted on one end, left side of screen spool d.
Such as Fig. 3, Fig. 5 and Fig. 7, Fig. 8, shown in Fig. 9, a kind of self-locking head structure 100 for screen described in the embodiment of the present invention, there is the rotating shaft 10 of screen connecting portion 11 including one end, in rotating shaft 10, fixed cover is provided with steel ball guide rail 20, steel ball guide rail 20 has the first track 21, first track 21 includes the drop-down rail groove 22 and the limit track groove 23 that are positioned at steel ball guide rail 20 outer surface, drop-down rail groove 22 is arranged near screen connecting portion 11, rotating shaft 10 is rotatably arranged with shell 30, shell 30 has the movable cavity 31 housing steel ball guide rail 20, the inwall of cavity 31 is arranged with the second track 32 along the axis direction of rotating shaft, first track 21 and the second track 32 are movably installed with steel ball 40, shell 30 has the first connecting portion 33 for fixedly mounting screen spring (not shown) away from one end of screen connecting portion 11, the other end of rotating shaft 10 runs through and extends shell 30 and forms the second connecting portion 12.
Shown in Fig. 3, Fig. 4, screen connecting portion 11 is square toes.Shown in Fig. 5, Fig. 6, the first connecting portion 33 is external screw thread.Shown in Fig. 1, Fig. 7, shell 30 is arranged in rotating shaft 10 by bearing 50 near one end of screen connecting portion 11.
Shown in Fig. 4, Fig. 7, rotating shaft 10 has installation portion 13, steel ball guide rail 20 is movably set on installation portion 13, steel ball guide rail 20 is fixedly connected with torsion spring 60 away from one end sidepiece of screen connecting portion 11 by screw (not shown), and torsion spring 60 relies on the reliable fixed cover of self torsion to be located on installation portion 13.Being close to installation portion 13 fixed cover in rotating shaft 10 equipped with pad 70, shown in Fig. 6, shell 30 has and the groove 34 of pad 70 matched in clearance.
Shown in Fig. 1, Fig. 7 to Fig. 9, drop-down rail groove 22 includes continuous connector loop and is wound on two main motion groove 22a of steel ball guide rail 20 outer surface, forward arc introduction segment 221, the forward section of seamlessly transitting 222 and forward arc that main motion groove 22a includes being connected successively along the drop-down direction of motion of steel ball derive section 223, the radian that forward arc introduction segment 221 and forward arc derive section 223 is roughly equal and in opposite direction, and screen connecting portion 11 is partial in the radian direction introversion of forward arc introduction segment 221.
Limit track groove 23 is arranged on the drop-down rail groove 22 side away from screen connecting portion 11, limit track groove 23 includes main stopper slot 23a corresponding with main motion groove 22a respectively, reverse arc introduction segment 231 that main stopper slot 23a includes being mutually linked, reverse changeover portion 232, screens section 233, forward are derived section 234 and reverse turn out section 235, the reverse sourcing mouth 231a correspondence forward arc of reverse arc introduction segment 231 derives section 223, and reverse reverse the turning turning out section 235 exports the 235a correspondence forward section of seamlessly transitting 222.
Having gap between the inwall of steel ball guide rail 20 and cavity 31, the second track 32 is semi-circular groove structure, and the groove radius of the second track 32 is slightly larger than the radius of steel ball 40.First connecting portion 33 is external screw thread.Externally threaded version facilitates implementation the installing/dismounting of screen spring, when mounted, one end of screen spring is fixing with shell to be connected, the other end of screen spring is connected by direct or indirect mode is fixing with the second connecting portion of rotating shaft, thus provide snap back active force when pivot, realizing automatically shrinking, when screen spring additionally aids drop-down simultaneously, motion is excessively fierce.
The foregoing is only explanation embodiments of the present invention; be not limited to the present invention, for a person skilled in the art, all within the spirit and principles in the present invention; any amendment of being made, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (4)
1. the self-locking head structure for screen, it is characterised in that including one end and have the rotating shaft of screen connecting portion, stating screen connecting portion is square toes；
In described rotating shaft, fixed cover is provided with steel ball guide rail, described steel ball guide rail has the first track, described first track includes the drop-down rail groove and the limit track groove that are positioned at described steel ball guide rail outer surface, described drop-down rail groove is arranged near described screen connecting portion, described drop-down rail groove includes continuous connector loop and is wound on two main motion grooves of described steel ball guide rail outer surface, described main motion groove includes the forward arc introduction segment being connected successively along the drop-down direction of motion of described steel ball, the forward section of seamlessly transitting and forward arc derive section, the radian that described forward arc introduction segment and described forward arc derive section is roughly equal and in opposite direction, described screen connecting portion is partial in the radian direction introversion of described forward arc introduction segment；
Described rotating shaft is rotatably arranged with shell, described shell is arranged in described rotating shaft near one end of described screen connecting portion by bearing, described shell has the movable cavity housing described steel ball guide rail, the inwall of described cavity is arranged with the second track along the axis direction of described rotating shaft, described first track and described second track are movably installed with steel ball, described shell has the first connecting portion for fixedly mounting screen spring away from one end of described screen connecting portion, and the other end of described rotating shaft runs through and extends described shell and forms the second connecting portion；
Described rotating shaft has installation portion, described steel ball guide rail is movably set on described installation portion, described steel ball guide rail is fixedly connected with torsion spring away from one end sidepiece of described screen connecting portion by screw, and described torsion spring relies on the reliable fixed cover of self torsion to be located on described installation portion；
Being close to described installation portion fixed cover in described rotating shaft equipped with pad, described shell has and the groove of described pad matched in clearance.
2. the self-locking head structure for screen as claimed in claim 1, it is characterized in that, described limit track groove is arranged on the described drop-down rail groove side away from described screen connecting portion, described limit track groove includes main stopper slot corresponding with described main motion groove respectively, described main stopper slot includes the reverse arc introduction segment being mutually linked, reverse changeover portion, screens section, forward is derived section and reverse turns out section, the corresponding described forward arc of the reverse sourcing mouth of described reverse arc introduction segment derives section, described reverse reverse the turning turning out section exports the corresponding described forward section of seamlessly transitting.
3. the self-locking head structure for screen as claimed in claim 2, it is characterised in that having gap between the inwall of described steel ball guide rail and described cavity, described second track is semi-circular groove structure, and the groove radius of described second track is slightly larger than the radius of steel ball.
4. the self-locking head structure for screen as claimed in claim 3, it is characterised in that described first connecting portion is external screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410025520.8A CN103744261B (en) | 2014-01-20 | 2014-01-20 | A kind of self-locking head structure for screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410025520.8A CN103744261B (en) | 2014-01-20 | 2014-01-20 | A kind of self-locking head structure for screen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103744261A CN103744261A (en) | 2014-04-23 |
| CN103744261B true CN103744261B (en) | 2016-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410025520.8A Active CN103744261B (en) | 2014-01-20 | 2014-01-20 | A kind of self-locking head structure for screen |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203688981U (en) * | 2014-01-20 | 2014-07-02 | 蔡兆和 | Self-locking head structure used for screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2749354B2 (en) * | 1989-03-04 | 1998-05-13 | 株式会社メタコ | Roll screen device |
| JP2006113177A (en) * | 2004-10-13 | 2006-04-27 | Kinki Education Center:Kk | Screen take-up device for projection screen or the like |
| TWI395050B (en) * | 2008-05-20 | 2013-05-01 | Coretronic Suzhou Corp | Projection screen apparatus |
| TWI381241B (en) * | 2008-07-11 | 2013-01-01 | Aixin Technologies Llc | Projection screen apparatus |
| CN101634803B (en) * | 2008-07-22 | 2011-02-09 | 苏州璨宇光学有限公司 | Projection screen device |
| CN202900017U (en) * | 2012-10-22 | 2013-04-24 | 梁焯雄 | Roller reduction gear and automatic rolling-type curtain or window screen thereof |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203688981U (en) * | 2014-01-20 | 2014-07-02 | 蔡兆和 | Self-locking head structure used for screen |
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| CN103744261A (en) | 2014-04-23 |
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