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Laser welding for drum base

A drum base, laser beam technology, applied in laser welding equipment, welding equipment, guidance of record carriers, etc., can solve problems such as inaccuracy, save screws, avoid drilling tapping holes and screw holes, and reduce costs.

Inactive Publication Date: 2002-10-16
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this scheme has the disadvantage of being imprecise

Method used

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  • Laser welding for drum base
  • Laser welding for drum base
  • Laser welding for drum base

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Experimental program
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Embodiment Construction

[0018] First of all, it should be pointed out that, for the sake of illustration, the Figure 1~5 In all the drawings, the same or equivalent elements / parts are indicated by the same reference numerals or letters.

[0019] Figure 5 A lower drum assembly of a rotary drum unit of a video tape recorder for recording and / or reproducing signals according to a helical scanning system is schematically illustrated in accordance with the prior art. Figure 5 is a bottom view of the lower drum assembly, as viewed from the VCR deck frame (not shown). The lower drum 1 and drum base 2 are joined together by three screw joints arranged near the periphery of the lower drum 1 assembly. As can be seen from this figure, in order to simplify the assembly process of the lower drum 1 and the drum base 2, index holes 3a, 3b and an index pin 3c and other holes 4a, 4b are provided to pass the screws 5a-5c (put the They are screwed into the lower drum 1) Before combining the lower drum 1 and the dru...

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PUM

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Abstract

It can be clearly seen from the video recorder that the rotating drum consists of a rotating part (upper drum) and a fixed part (lower drum), and forms a drum unit with a drum base (2), through which the drum Configured at an inclination relative to the plane of the VCR deck frame. According to the invention, the lower drum (1) and the drum base (2) are joined together by welding, in particular by laser welding. This solution simplifies the assembly of the lower drum (1) and the drum base (2), and reduces the cost of manufacturing the drum unit.

Description

technical field [0001] In general, the present invention relates to a rotating drum for a video tape recorder for recording and / or reproducing signals according to a helical scanning system, and more particularly to an assembly of a rotating drum. Background technique [0002] It is clear from the video recorder that the rotating drum consists of a rotating part (upper drum) and a fixed part (lower drum), and forms a drum unit with a so-called drum base, through which the drum is pressed Configured at an inclination relative to the plane of the VCR deck frame. In order to combine the drum and the drum base together, practice has proved that the screw joint between the drum base and the lower drum (for example, as Figure 5 ) is ideal. [0003] According to another solution, the inclination can also be obtained by punching the deck frame accordingly. This solution is less expensive as it facilitates mounting the drum directly on the deck frame, ie without the aforementioned...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/7826G11B5/52G11B15/61G11B25/06
CPCG11B15/61G11B25/063G11B5/52
Inventor 菲利浦·波萨德米切尔·帕若特
Owner THOMSON LICENSING SA