US 9,074,913 B2Granted

Instrument driving device

AssigneeNippon Seiki Co., Ltd.

InventorMasahiro Watanabe

Life of this patent

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Abstract

An instrument driving device includes a magnet which rotates; a driving gear coaxial with the magnet; an output gear driven by the magnet; a needle pointer shaft which has a needle pointer mounted thereon and rotatably supports the output gear; a transmission gear which transmits rotation of the driving gear to the output gear; and a case which accommodates parts of the driving device elements, wherein a stopper and a bearing part which rotatably supports the needle pointer shaft are provided in the case, a protrusion which makes contact with the stopper is formed in the output gear, a contact point with which the needle pointer shaft makes contact is formed in the bearing part, and the end section at the protrusion side of the stopper is in the same position as the contact point in the axial direction of the needle pointer shaft.

Claims4

Dependent claims

An instrument driving device comprising:

a rotating magnet;
a driving gear having the same axis as the magnet;
an output gear driven by the magnet;
a needle pointer shaft having a needle pointer mounted thereon and rotatably supports the output gear;
a transmission gear that transmits rotation of the driving gear to the output gear;
and a case that accommodates the magnet, the driving gear, the output gear, the transmission gear, and a portion of the needle pointer shaft, wherein
the case is provided with a stopper and a bearing portion that rotatably supports the needle pointer shaft,
the output gear is provided with a protrusion that comes into contact with the stopper,
the bearing portion is provided with a contact point with which the needle pointer shaft comes into contact, and
an end at the protrusion side of the stopper is provided at a same position as the contact point in an axial direction of the needle pointer shaft.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/821,023Filed 19 Aug 2011
Priority: JP 2010-20625415 Sep 2010
Published: US 2013/0160582 A127 Jun 2013
Granted: 7 Jul 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

G01D 13/22
Component parts of indicators for measuring arrangements not specially adapted for a specific variable: pointers, e.g. settable pointer
G01D 11/16
Component parts of measuring arrangements not specially adapted for a specific variable: elements for restraining, or preventing the movement of,…
G01D 11/28
Component parts of measuring arrangements not specially adapted for a specific variable: structurally-combined illuminating devices
H02K 7/116
Structural association with clutches, brakes, gears, pulleys or mechanical starters: with gears