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Extension type film projection rod

A film projection and metal tube technology, applied in projection devices, optics, instruments, etc., to achieve the effects of convenient transportation, shortened length, and convenient replacement

Active Publication Date: 2011-03-09
SHANDONG HUIYING SCI & TECH MEDIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002]The film projecting rod is used when showing the film. The traditional film projecting rod is a steel pipe with a support welded on the lower end. The ring is used to tie the curtain. Due to the large size of the movie screen, the length of the projection rod is long, which is inconvenient to carry, and the parts on the projection rod are welded to the projection rod, which is inconvenient to replace

Method used

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  • Extension type film projection rod
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  • Extension type film projection rod

Examples

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Embodiment Construction

[0020] Examples, as attached figure 1 , 2 As shown, a stretchable film projection rod, the projection rod includes a number of metal tubes that are sequentially socketed and relatively sliding, and the adjacent metal tubes that are socketed with each other are provided with a retaining device, and the retaining device includes A pair of cards 4 oppositely arranged at the bottom of the metal tube 11 nested inside and a bayonet 7 provided on the upper part of the outer metal tube 3, the bottom of the metal tube 11 nested inside is provided with a fixed part 15 and the through hole 6, one end of the card 4 is respectively hinged on the fixing part 15, and the fixing part 15 is connected with the metal pipe 11 sleeved inside by a rivet 17, and the fixing part 15 is a The metal tube 11 is a cylinder corresponding to the shape of the cavity, and the fixed part 15 is provided with a middle groove, and the card 4 is installed in the middle groove, and the card 4 is hinged with the f...

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Abstract

The invention relates to an extension rod structure, in particular to an extension type film projection rod which comprises a plurality of metal tubes which are in socket joint in sequence and oppositely slide. Every two adjacent metal tubes which are in mutual socket joint are provided with fixing devices; each fixing device comprises a pair of cards and a latch notch, wherein the pair of cards is arranged at the bottom of the inner metal tube of every two metal tubes in socket joint, and the latch notch is arranged at the upper part of the outer metal tube; the bottom of each metal tube is provided with a fixing part and a through hole; one end part of each card is hinged on the fixing part; and a spring is arranged between the cards. The extension type film projection rod is provided the metal tubes which are in socket joint in sequence so that the length of the film projection rod is adjustable, and the metal tubes are taken back when not used so as to shorten the length of the film projection rod. The extension type film projection rod is convenient for transportation and the mobile projection of films.

Description

technical field [0001] The invention relates to a stretch rod structure, in particular to a stretch type film projecting rod. Background technique [0002] Movie projection rods are used when showing movies. The traditional movie projection rod is a steel pipe with a low end welded with a support. Therefore, the length of the projection rod is relatively long, which is inconvenient to carry, and the parts on the projection rod are welded on the projection rod, which is inconvenient to replace. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a detachable, easy to carry and transport, and a stretchable film projection rod suitable for film streaming. [0004] In order to achieve the above purpose, the technical solution adopted in the present invention is: a stretchable film projection rod, the projection rod includes several metal tubes which are sequentially socketed and slide relative to each other. There i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/32G03B21/54
Inventor 牟敦箫
Owner SHANDONG HUIYING SCI & TECH MEDIA
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