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GB2423788A - Piezo ceramic actuator for a lock bolt - Google Patents

Piezo ceramic actuator for a lock bolt Download PDF

Info

Publication number
GB2423788A
GB2423788A GB0504461A GB0504461A GB2423788A GB 2423788 A GB2423788 A GB 2423788A GB 0504461 A GB0504461 A GB 0504461A GB 0504461 A GB0504461 A GB 0504461A GB 2423788 A GB2423788 A GB 2423788A
Authority
GB
United Kingdom
Prior art keywords
piezo ceramic
ceramic actuator
bolt
motion
lock bolt
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.)
Withdrawn
Application number
GB0504461A
Other versions
GB0504461D0 (en
Inventor
Simon Powell
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.)
PBT IP Ltd
Original Assignee
PBT IP Ltd
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 PBT IP Ltd filed Critical PBT IP Ltd
Priority to GB0504461A priority Critical patent/GB2423788A/en
Publication of GB0504461D0 publication Critical patent/GB0504461D0/en
Publication of GB2423788A publication Critical patent/GB2423788A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
    • E05B47/0011—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with piezoelectric actuators
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/85—Piezoelectric or electrostrictive active materials
    • H10N30/853—Ceramic compositions
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B47/02—Movement of the bolt by electromagnetic means; Adaptation of locks, latches, or parts thereof, for movement of the bolt by electromagnetic means
    • E05B47/026—Movement of the bolt by electromagnetic means; Adaptation of locks, latches, or parts thereof, for movement of the bolt by electromagnetic means the bolt moving rectilinearly
    • H01L41/053—
    • H01L41/187—
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/10—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors
    • H02N2/108—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing rotary motion, e.g. rotary motors around multiple axes of rotation, e.g. spherical rotor motors
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/20—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators
    • H10N30/204—Piezoelectric or electrostrictive devices with electrical input and mechanical output, e.g. functioning as actuators or vibrators using bending displacement, e.g. unimorph, bimorph or multimorph cantilever or membrane benders
    • H10N30/2041—Beam type
    • H10N30/2042—Cantilevers, i.e. having one fixed end
    • H10N30/2044—Cantilevers, i.e. having one fixed end having multiple segments mechanically connected in series, e.g. zig-zag type
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/88—Mounts; Supports; Enclosures; Casings
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

A piezo ceramic actuator assembly for controlling the motion of a member 14 in two dimensions comprises two orthogonally mounted piezo ceramic actuator devices 21,22 each provided with a bearing 21a,22a connected to spaced apart portions <WC 1>27,28 of the member to be moved. The bearings 21a,22a are part-spherical and the portions 27,28 are spherical. The actuators move member 14 so as to effect linear movement of a locking bolt 11.

Description

ELECTRICALLY CONTROLLED MOTION
The present invention relates to electrically controlled motion of a member.
There are many mechanisms which require the motion of a member such as a latch or bolt and in many circumstances this can be achieved using one or more solenoids. However, there is a difficulty when one needs to have a complex locus of motion of a member especially where space considerations mean that the overall arrangement must be as compact as possible.
The present invention proposes an electrical control arrangement comprising a pair of orthogonally arranged piezo ceramic actuators each attached to a control member so as to cause a free end of the control member to describe a complex locus of motion in two dimensions.
In use, the free end of the control member can be used to engage a latch or bolt, for example, and after engaging with the bolt move the latch or bolt in a desired manner.
In order that the present invention be more readily understood, an embodiment thereof will now be described with reference to the accompanying drawing in which:- Fig 1 shows a diagrammatic perspective view of an assembly according to the present invention; and Fig 2 shows a part of the arrangement shown in Fig 1.
In order to properly describe the present invention, it is assumed that a member to be moved is in the form of a bolt 11 which should be reciprocated in the bore of a tube 12. It is also assumed that there is little free space around the tube 12. Consequently, the wall of the tube is provided with an axially extending aperture 13 which permits a control member 14 to engage in a recess 16 in the bolt 11 and once engaged in the recess move the bolt axially within the limits defined by the aperture 13.
It will be appreciated that, if the control member 14 is not to be permanently engaged in the recess 16, the free end of the control member 14 has to describe a somewhat complicated locus of movement. This is achieved by means of a piezo ceramic actuator arrangement generally indicated by the reference numeral 20.
The actuator arrangement comprises two piezo ceramic actuators 21 and 22 mounted at right angles to each other on a mounting block 24. In this case, the actuators are each of a hairpin construction with the length dimension of the hairpin being in the same general direction as the length of the control member 14.
In turn, this means that the bight of the hairpins are adjacent the tube 13 and the free end of each of the hairpin actuators is located adjacent the mount 24.
The free end of each of the piezo ceramic actuators 21,22 is provided with a universal mounting and bearing 21a and 22a which in this case comprises simply a part spherical recess which is arranged to receive a spherical portion of the control member 14. This is more clearly shown in Fig 2 where the control member 14 is seen to consist of an elongate lever portion 26 and two spaced apart spherical portions 27 and 28 which are received in the part spherical mounts 22a and 21a respectively. The portions 27 and 28n are located adjacent one end of the control member 14 which consequently means that free end of the elongate level portion moves through a greater distance than the bearings 21 a and 22a. The spacing between the portion can be altered as desired in order to provide the required movement of the bolt.
With this arrangement, the free end 14a of the control member 14 can be controlled by selective operation of one or both of the piezo ceramic actuators in order to describe the required motion and thus move into engagement with the bolt I I and subsequently move the bolt in the bore of the tube 12 in a fully controlled fashion.

Claims (4)

  1. CLAIMS: 1. A piezo ceramic actuator assembly for controlling the motion of
    a member in two dimensions comprising two orthogonally mounted piezo ceramic actuator devices each provided with a bearing connected to spaced apart portions of the member to be moved.
  2. 2. An assembly according to claim 1, wherein the bearings are partspherical and the spaced apart portions are part spherical and arranged adjacent one end of the member.
  3. 3. An assembly according to claim 1 or 2, wherein the actuator devices are elongate and are disposed generally in the same direction as a line joining the bearings of the devices.
  4. 4. A piezo ceramic actuator assembly substantially as hereinbefore described with reference to the accompanying drawing.
GB0504461A 2005-03-02 2005-03-02 Piezo ceramic actuator for a lock bolt Withdrawn GB2423788A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0504461A GB2423788A (en) 2005-03-02 2005-03-02 Piezo ceramic actuator for a lock bolt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0504461A GB2423788A (en) 2005-03-02 2005-03-02 Piezo ceramic actuator for a lock bolt

Publications (2)

Publication Number Publication Date
GB0504461D0 GB0504461D0 (en) 2005-04-13
GB2423788A true GB2423788A (en) 2006-09-06

Family

ID=34451779

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0504461A Withdrawn GB2423788A (en) 2005-03-02 2005-03-02 Piezo ceramic actuator for a lock bolt

Country Status (1)

Country Link
GB (1) GB2423788A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3928778A (en) * 1973-06-26 1975-12-23 Evgeny Alexandrovich Ivanov Device for the precision displacement of an article within a plane
US4678955A (en) * 1986-04-18 1987-07-07 Rca Corporation Piezoelectric positioning device
GB2378573A (en) * 2001-06-20 2003-02-12 Polatis Ltd A piezoelectric actuator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3928778A (en) * 1973-06-26 1975-12-23 Evgeny Alexandrovich Ivanov Device for the precision displacement of an article within a plane
US4678955A (en) * 1986-04-18 1987-07-07 Rca Corporation Piezoelectric positioning device
GB2378573A (en) * 2001-06-20 2003-02-12 Polatis Ltd A piezoelectric actuator

Also Published As

Publication number Publication date
GB0504461D0 (en) 2005-04-13

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)