JPS56142608A - Plunger device - Google Patents

Plunger device

Info

Publication number
JPS56142608A
JPS56142608A JP4550380A JP4550380A JPS56142608A JP S56142608 A JPS56142608 A JP S56142608A JP 4550380 A JP4550380 A JP 4550380A JP 4550380 A JP4550380 A JP 4550380A JP S56142608 A JPS56142608 A JP S56142608A
Authority
JP
Japan
Prior art keywords
coil
speed
yoke
drive coil
bobbins
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP4550380A
Other languages
Japanese (ja)
Inventor
Satoru Kusaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Priority to JP4550380A priority Critical patent/JPS56142608A/en
Publication of JPS56142608A publication Critical patent/JPS56142608A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/066—Electromagnets with movable winding

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

PURPOSE:To decrease sounds in case of working and enable the control of operating speed by a method wherein a drive coil and a speed sensor are mounted, currents supplied to the drive coil are controlled by the detecting output of the speed sensor and speed-servo is applied. CONSTITUTION:A discoid yoke 2 is disposed at an approximate central section of a cylindrical yoke 1 toward the inside, center yokes 3, 4 are mounted at a central section of the yoke 2 and ringed magnets 5, 6 are installed at both sides of the yoke 2. Bobbins 9, 10 are each fitted to the center yokes 3, 4 in slide-possible shapes. A drive coil 11 and a speed detecting coil 12 are each wound on the bobbins 9, 10, and the bibbins 9, 10 are connected by several connecting rods 14 penetrating a through hole 13 of the yoke 2. When the drive coil 11 is conducted, the coil 11 is moved in the axis direction, the speed detecting coil 12 is also moved together with the coil 11, and current, proportional to the speed flow through the coil 12, thus allowing speed-servo by the output.
JP4550380A 1980-04-07 1980-04-07 Plunger device Pending JPS56142608A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4550380A JPS56142608A (en) 1980-04-07 1980-04-07 Plunger device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4550380A JPS56142608A (en) 1980-04-07 1980-04-07 Plunger device

Publications (1)

Publication Number Publication Date
JPS56142608A true JPS56142608A (en) 1981-11-07

Family

ID=12721202

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4550380A Pending JPS56142608A (en) 1980-04-07 1980-04-07 Plunger device

Country Status (1)

Country Link
JP (1) JPS56142608A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7327054B2 (en) * 2005-03-25 2008-02-05 Asm Technology Singapore Pte. Ltd. Linear actuator comprising velocity sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7327054B2 (en) * 2005-03-25 2008-02-05 Asm Technology Singapore Pte. Ltd. Linear actuator comprising velocity sensor

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