JPH0313979U

JPH0313979U -

Info

Publication number: JPH0313979U
Application number: JP6902490U
Authority: JP
Priority date: 1990-06-28
Filing date: 1990-06-28
Publication date: 1991-02-13
Anticipated expiration: 2005-06-28
Also published as: JPH0729976Y2

Description

[Brief explanation of drawings]

第１図は本考案の一実施例の垂直全回転かま１
０の正面図、第２図は垂直全回転かま１０の斜視
図、第３図は第２図の切断面線−から見た部
分断面図、第４図は典型的な先行技術の斜視図、
第５図は先行技術のオープナ機構を説明するため
の斜視図である。１０…垂直全回転かま、１１…下糸、１２…ボ
ビン、１３…ボビンケース、１４…内かま、１５
…外かま、１８…かま止め凹所、１８ａ…当接面
、１９…回り止め部材、２０…凸部、２０ａ…係
止面、２２…鍔、２２…永久磁石片、２４…磁気
吸引部材、５１…挿通孔、５２…永久磁石片２２
の端面、５３…外向きフランジ２１の表面、５４
…磁気吸引部材２４の対向面、５５…外周面、５
９…円弧面。 Figure 1 shows a vertical full-rotation hook 1 according to an embodiment of the present invention.
2 is a perspective view of the vertical full rotation hook 10, FIG. 3 is a partial sectional view taken along the cutting plane line - of FIG. 2, and FIG. 4 is a perspective view of a typical prior art.
FIG. 5 is a perspective view for explaining the prior art opener mechanism. 10...Vertical full rotation hook, 11...Bobbin thread, 12...Bobbin, 13...Bobbin case, 14...Inner hook, 15
...Outer hook, 18... Hook stopper recess, 18a... Contact surface, 19... Rotating member, 20... Convex portion, 20a... Locking surface, 22... Flange, 22... Permanent magnet piece, 24... Magnetic attraction member, 51...Insertion hole, 52...Permanent magnet piece 22
End face, 53...Surface of outward flange 21, 54
...Opposing surface of the magnetic attraction member 24, 55...Outer peripheral surface, 5
9... Arc surface.

Claims

[Claims for Utility Model Registration] An outer hook 15 that is rotationally driven toward the downstream side in the rotational direction A around a rotational axis l2 perpendicular to the movement path l1 of the needle 50 that is reciprocated up and down, and an outer hook rotation. When the rotation stopper member 1 is fixed at a fixed position
In a vertical full-rotation hook including an inner hook 14 in which a hook locking recess 18 is formed into which a protrusion 20 of No. An insertion hole 51 is formed to be inserted in the thickness direction, and a permanent magnet piece 22 is fitted thereinto, and an end face 5 of this permanent magnet piece 22 on the open end side of the inner hook is formed.
, 2 are in the same plane as the surface 53 of the outward flange 21 on the inner hook open end side, and the needle thread can pass through the surface 52 of the permanent magnet piece 22 at a position near the permanent magnet piece 22. Magnetic attraction members 24 facing each other with an interval L are disposed, and an opposing surface 54 facing the end surface 53 of the permanent magnet piece 22 of the magnetic attraction member 24 is connected to the permanent magnet piece 2.
The outer circumferential surface 5 of the outward flange 21 is magnetized to have a magnetic pole opposite to that of the surface 53 of the outer flange 21.
The magnetic attraction member 24 has a proximal end 56 fixed to the free end 5 of the support member 23 fixed to the body 57 of the sewing machine.
A circular arc surface 59 corresponding to the outer circumferential surface of the bobbin case 13 is formed on the free end portion 58 so as to avoid the movement path of the bobbin case 13 that is attached to and removed from the inner hook 14, and the free end portion 58 is fixed to the inner hook 14. In a state where the member 24 and the permanent magnet piece 22 are magnetically attracted, the abutment surface 18a of the rotary hook recess 18 facing the downstream side in the outer hook rotation direction A and the protrusion 20 of the detent member 19 facing the outer hook rotation direction A upstream side The vertical full-rotation hook is characterized in that the locking surfaces 20a facing the side are spaced apart from each other.