DE1466624C

DE1466624C - Core magnet moving coil instrument

Info

Publication number: DE1466624C
Authority: DE
Inventors: Fritz 8000 München Rumpelein
Original assignee: Agfa AG
Current assignee: Agfa Gevaert NV
Publication date: 1971-01-07

Description

Die Erfindung betrifft ein Kernmagnet-Drehspul- Rückschlußring aufweisen, wobei die Einschiebeinstrument, bei dem der Kernmagnet, der Rück- halterungen einseitig in Richtung der Drehachse der schlußring und der aus Kunststoff hergestellte Träger Drehspule offen sind, und daß der Träger im mittledurch ineinanderschieben zusammengesetzt sind. ren Bereich zwischen den Backen einen den Kern-The invention relates to a core magnet moving coil yoke ring, wherein the insertion instrument, in which the core magnet, the restraints on one side in the direction of the axis of rotation ring and the carrier made of plastic rotating coil are open, and that the carrier in the middle are put together. the core area between the jaws

Ein solches Kernmagnet-Drehspulinstrument ist 5 magneten durchsetzenden, zur Aufnahme der Lager aus der schweizerischen Patentschrift 376 175 be- für die Drehspule dienenden Ansatz aufweist, wobei kannt. Der Kernmagnet ist mit einer Bohrung ver- ein Lager über ein im Ansatz in Achsrichtung versehen, durch welche verstellbare Lagermittel durch- stellbares Lagerteil einstellbar ist. .
greifen, wobei mindestens ein Lagerteil am Kern- Ein so gekennzeichnetes Kernmagnet-Drehspulmagneten befestigt ist. Die Lagerteile dienen zur Auf- ίο instrument weist nun folgende Vorteile auf: Der aus nähme der Lager der Drehspule. Beim Montieren des Kunststoff zu fertigende Träger läßt sich in einfacher bekannten Drehspulinstrumentes wird zunächst ein Weise in seiner einstückigen Ausbildung z. B. im Träger in radialer Richtung des Rückschlußringes auf Spritzverfahren herstellen, was besonders für die denselben geschoben. Sodann wird der Kernmagnet Serienfertigung von Vorteil ist. Ein weiterer Vorteil ebenfalls in radialer Richtung des Rückschlußringes 15" ist darin zu sehen, daß durch das Vorsehen von zwei in eine Ausnehmung des Trägers gebracht, wonach Backen am Träger eine einfache Halterungsmöglichanschließend ein weiterer Träger in Achsrichtung des keit für den Kernmagne'ten gegeben ist, daß durch Rückschlußringes zwischen den Rückschlußring und das Vorsehen von Schlitzen in den Backen eine einden Kernmagnet eingeschoben wird. Danach erfolgt fache Emschiebehalterung für den Rückschlußring die Sicherung des Kernmagneten durch eine Schraube. 20 gegeben ist, und daß durch das Vorsehen eines mitt-Sodann müssen die entsprechenden Lagerteile in die leren Ansatzes am Träger dieser in vorteilhafter zentrische Bohrung des Kernmagneten eingebracht Weise zur Aufnahme der Lagerungen dient, wobei werden. . ein Lagerteil im Ansatz in Achsrichtung verstellbarSuch a core magnet moving coil instrument is 5 magnets penetrating, for receiving the bearings from the Swiss patent 376 175 serving for the moving coil approach, where known. The core magnet is provided with a bore and a bearing via a shoulder in the axial direction through which adjustable bearing means can be adjusted. .
grip, wherein at least one bearing part is attached to the core A so marked core magnet moving coil magnet. The bearing parts are used for recording ίο the instrument now has the following advantages: It would take the bearings of the moving coil. When assembling the plastic to be manufactured carrier can be in a simple known moving coil instrument is first a way in its one-piece design z. B. produce in the carrier in the radial direction of the return ring on injection molding, which is especially pushed for the same. Then the core magnet series production is advantageous. Another advantage also in the radial direction of the yoke ring 15 "is to be seen in the fact that the provision of two is brought into a recess in the carrier, after which the jaws on the carrier provide a simple mounting option, then another carrier in the axial direction of the speed for the core magnet that a core magnet is pushed in through the yoke ring between the yoke ring and the provision of slots in the jaws. After that, the core magnet is secured by a screw 20 with a multiple insertion holder for the yoke ring, and that by providing a mitt-Sodann must the corresponding bearing parts are placed in the leren attachment on the carrier, which is advantageously placed in the central bore of the core magnet and serves to accommodate the bearings, with a bearing part in the attachment being adjustable in the axial direction

Das Zusammenfiigen der einzelnen Teile der be- ist. Durch die einstückige Ausbildung^des zur Aufkannten Vorrichtung erfordert eine große Sorgfalt 25 nähme der besagten Teile des Kernmagnet-Drehspul- und einen relativ großen Zeitaufwand, da eine große Instrumentes dienenden Trägers ist ein Höchstmaß Anzahl von Einzelteilen benötigt wird. Dies ist be- an Herstellungsgenauigkeit gegeben, da die bei mehrsonders für eine Serienfertigung nachteilig. / . teilig hergestellten Bauteilen auftretenden ToleranzenThe assembly of the individual parts of the is. Due to the one-piece training ^ of what is to be recognized Device requires great care 25 would take the said parts of the core magnet moving coil and a relatively large amount of time, since a large instrument-serving carrier is a maximum Number of items is required. This is given in terms of manufacturing accuracy, since the more special disadvantageous for series production. /. partially manufactured components occurring tolerances

Weiterhin ist aus der österreichischen Patentschrift vermieden sind. Ein weiterer Vorteil ist darin zu 169 76.8 ein Drehspulinstrument bekannt, das unter 3° sehen, daß sowohl der Kernmagnet als auch der anderem einen aus Eisen bestehenden, zylindrisch Rückschlußring von der gleichen Seite her auf den ausgebildeten Rückschlußteil aufweist, in dem an Träger geschoben werden. Diese Vorteile sind jedoch zwei gegenüberliegenden Seiten zwei aus magnetisch bei den bekannten Vorrichtungen nicht gegeben,
nicht leitfähigem Material bestehende Distanzstücke Zweckmäßigerweise sitzt das einstellbare Lager an angebracht sind, die jeweils an ihrem einen Ende 35 einem mittels eines Gewindezapfens in den Ansatz einen Ansatz aufweisen, der zur Festlegung des zwi- des Trägers einschraubbaren Lagerflansch,
sehen die beiden Distanzstücke einzuschiebenden Nach einer weiteren Ausgestaltung der Erfindung kreisförmigen Kefnmagneten dient. Im Luftspalt zwi- sind an den Backen Vorsprünge eckigen Querschen Magnet und Eisenring .ist eine bewegliche Spule Schnitts zum Aufstecken von Zuleitungsblechen voruntergebracht, die an Bündchen aufgehängt ist, welche 40 gesehen.Furthermore is avoided from the Austrian patent. Another advantage is known to 169 76.8 a moving coil instrument, which see at 3 ° that both the core magnet and the other have an iron, cylindrical return ring from the same side on the formed return part in which the carrier is pushed . However, these advantages are not given to two opposing sides, two from magnetic in the known devices,
non-conductive material existing spacers. Expediently, the adjustable bearing is attached, each of which has at its one end 35 a projection in the approach by means of a threaded pin, which is used to fix the bearing flange that can be screwed in between the carrier,
see the two spacers to be inserted. According to a further embodiment of the invention, circular key magnets are used. In the air gap between projections of angular transverse magnets and iron ring on the jaws, a movable coil of cut for attaching feed sheets, which is suspended from cuffs, which is seen.

wiederum an zwei Aufhängeorganen befestigt sind, Um eine einwandfreie, gegen Verkanten gesicherteare in turn attached to two suspension organs, to ensure a perfect, secured against tilting

die mit dem Eisenrückschlußring in Verbindung Lagerung für den Rückschlußring zu erzielen, ist dieto achieve the storage for the return ring in connection with the iron return ring, is the

stehen. . . Außenwand des- Schlitzes der einen Backe durchstand. . . Outer wall of the slot through one jaw

Bei-der bekannten Vorrichtung müssen entweder ringabschnittsförmige, den Kernmagneten mit derIn-the known device must either ring segment-shaped, the core magnet with the

die Distanzstücke durch Kleb- oder Schraubverbin- 45 Drehspule teilweise umgreifende, Anlagefiächen für45 moving coil partially encompassing contact surfaces for

dung am Eisenschlußring befestigt werden oder aber die Außenfläche und eine Stirnfläche des Rückschluß-can be attached to the iron shorting ring or the outer surface and one end face of the short-circuit

die Distanzstückc und der Kernmagnet so exakt ge- ringes bildende Wandungen verlängert,the spacer and the core magnet are lengthened to create exactly small walls,

fertigt werden, daß zwischen den einzelnen Teilen Gemäß einer anderen Ausgestaltung der Erfindungbe manufactured that between the individual parts According to another embodiment of the invention

eine genügend starke Haftverbindung gegeben ist. findet ein aus zwei schalenförmigen Magneten zu-there is a sufficiently strong adhesive bond. finds one of two bowl-shaped magnets

Dics ist jedoch für eine Justierung nachteilig. Ein 50 sammengesetzter Kernmagnet Verwendung. DabeiHowever, Dics is disadvantageous for an adjustment. Use a 50 composite core magnet. Included

weiterer Nachteil ist bei der bekannten Vorrichtung kann jede Schale zwischen einer Backe und dem denAnother disadvantage of the known device is each shell between a jaw and the

darin zu sehen, daß die baulichen Abmessungen des Gewindezapfen aufnehmenden Ansatz des Trägersit can be seen that the structural dimensions of the threaded pin receiving approach of the carrier

Drchspulinstrumentes in, axialer Richtung gesehen, festgelegt sein,Be fixed in the axial direction,

relativ groß sind. An dem erfindungsgemäß ausgestalteten Trägerare relatively large. On the carrier designed according to the invention

Der Erfindung liegt nun die Aufgabe zugrunde, 55 können also alle wesentlichen Teile des Instrumentes " unter Vermeidung der bei den bekannten Vorrichtun- in einfacher Weise durch Anstecken angeschlossen gen gegebenen Nachteile ein Kernmagnet-Drehspul-' werden. . .
instrument zu schaffen, das möglichst wenige Einzel- Eine weitere Fertigungsvereinfachung läßt sich teile aufweisen soll und dessen Fertigung, insbeson- dadurch erreichen, daß ein mit einem inneren, etwa dere in Großserien, vereinfacht werden soll. Weiter- 60 ringförmigen Aufnahmeraum versehenes Gehäuse hin sollen die baulichen Abmessungen möglichst ge- vorgesehen ist, in das der Träger mit allen angering gehalten werden. schlossenen Teilen einschiebbar ist. Dabei ist vorteil- The invention is now based on the object that all essential parts of the instrument can become a core magnet moving coil while avoiding the disadvantages associated with the known devices.
To create an instrument that has as few individual parts as possible, and its manufacture, in particular, should be achieved in that one with an inner one, for example those in large series, is to be simplified. A further housing provided with an annular receiving space should, as far as possible, have the structural dimensions in which the carrier and all of them are kept small. closed parts can be inserted. It is advantageous

Dies wird erfindungsgemäß dadurch erreicht, daß haft die offene Ober- und Unterseite des GehäusesThis is achieved according to the invention in that the open top and bottom of the housing stick

der aus Kunststoff hergestellte Träger einstückig aus- mittels je eines Deckels abschließbar und es sind inthe carrier made of plastic can be locked in one piece by means of a cover each and are in

gebildet und zur Bildung der Einschiebehalterung für 65 den der Ober- und Unterseite benachbarten Seiten-and to form the slide-in bracket for 65 side panels adjacent to the top and bottom

mindüstens einen Kernmagneten mit zwei Backen wänden des Gehäuses Durchtrittsöffnungen für je einAt least one core magnet with two jaw walls of the housing through openings for one each

versehen ist, die kreisförmig gebogene Schlitze zur Zuleitungsblech vorgesehen. Durch diese Ausgestal-is provided, the circularly curved slots are provided for the feed sheet. Through this design

Bildung einer weiteren Einschiebehalterung für einen tung können die Zuleitungsbleche gleichzeitig zurFormation of a further slide-in holder for a device can be used for the feed sheets at the same time

Claims

Have drawn down the carrier in the housing. The feed sheets 26, 27 are included

will. expediently by hot deformation of the free

In a preferred embodiment, the ends of the projections 28, 29 have captive thereon Housing a guide for attaching a set by. An angled end of a dovetail-shaped pointer 30 is also attached to the rotating coil 23, formed a scale holder. It therefore consists of a The carrier 1 can be fanned together with the on it Way the possibility, depending on the use, of closed parts in a ring-shaped open-purpose of the instrument differently designed receiving space of an expediently made of plastic he.rge scales to be able to start. Advantageously, the housing 31, which is open on both sides, is pushed in for the locked position Placement of the scale carrier on the housing will be one of these io. The housing 31 has an inner one overlapping, made of transparent material herge- abutment web 32 on which the lower edge 33 of the provided cover cap which comes to rest in grooves of the carrier 1. They are useful Housing is retractable and has the tabs, parts designed so that the carrier without larger Over which edges the force applied to the housing was pushed into the housing 31 grasp. 15 den can.

In a further embodiment of the invention, the housing 31 has a guide 34, which with

seen that the plug connections, as far as necessary, two lateral guides angled by more than 90 °

dig, secured by gluing or welding approximately surfaces 35, 36 is provided. The guide surface

are. 34 forms an abutment for a scale carrier 37,

The drawing shows an exemplary embodiment of FIG. 20 which has two angled ends 38, 39. the

Invention reproduced. It shows ends 38, 30 are when sliding the scale

F i g. 1 shows a perspective exploded support on the guide 34 resiliently on the guide representation of the instrument according to the invention and surfaces 35, 36. To determine the scale holder

2 shows a longitudinal section through this instrument. 37 on the housing31 is also used for the front

The instrument shown comprises a support 1, cap 40 covering .25 the scale playing pointer 30. made of a plastic, for example in injection molding, the cap 40 is made of a transparent, is made. The carrier 1 has two jaws 2, 3 transparent material, preferably also on, whose facing surfaces are circular made of a plastic and can be in grooves 41, ■ are bent. Between these surfaces is a core 42, which is behind the two ends of the guide 34 on magnet 4 inserted. The core magnet can be inserted through 30 housings 31 provided. On Applying spots of adhesive 57 to the cover cap 40 while pushing and shaking, tabs 43 are also pre-secured be connected to the carrier 1, seen via the front edges 44, 45 of lids

The jaws 2, 3 also have a circular shape 46, 47 to terminate the two open sides of the

bend slits 5, 6. A housing 31 engages over these slots. By placing the two

slotted return ring 7 can be inserted. In the one 35 the cover 46, 47 is therefore the cover cap 40

The pushed position are set in the slot of the rear on the housing 31.

Closing ring 7 delimiting edges 8 at one of the. In addition to the slot 6, each of the two covers 46, 47 has an interrupting web 9. The outer wall of the bent-over front edge 44, 45 still engages around the slot 5 of the jaw 3 through the edge 48 and 49 running along the ring section. The shaped edge 49, which partially encompasses the core magnet 4, is extended when the cover 47 is placed on the Ge walls. The walls 10 have housing 31 on a shoulder 50 to rest, while an inner protruding edge 11. At this the edge 48 rests on the contact web 32. A unKante 11 is located after the insertion of Rückschluß- desired rotation of the lid 45, ₄₆ to verhinringes 7 whose end face 12, while its said, are in the edges 48, 49 recesses outer surface to the inner surface of the walls 10 45 51 or 52 provided, the cams 53 of the housing. is applied. . 31 overlap. In addition, in the margins 48,

The carrier 1 has a central extension 13, 49 through openings 54, 55 are provided. On the which extends through a bore 4 of the core magnet, the height of these passage openings, the outer extends. In one end of the extension 13 is an edge of the housing 31 also through openings Bearing block 15 or a metallic bearing shell at 5 ° 56. Pressed out through these outlet openings 54, 55, 56. The approach 13 is with a gene open on one side, the feed sheets 26, 27 therethrough. Through this Provided bore 16 into which a thread 17 is not only a simple connection cut. A thread option for electrical leads can be created in this thread, pin 18 of a bearing flange 19, in which but also the carrier 1 is fixed in the housing 31, a bearing block 20 or a bearing shell is used, 55 instead of that shown in the exemplary embodiment be screwed in. The bearing flange 19 can round core magnets can also create two through a nut 21, which is also used on the threaded magnets. These are pin 18 is screwed, then expediently between a jaw and at the desired height can be determined as F i g. 2 shows. In this position the middle, the threaded pin receiving engage in the jewels 15, 20 bearing tips 22 60 approach 13 set. The use of such a a moving coil 23. The winding of the moving coil divided core magnet facilitates the influence stands over contact and return springs 24, 25 solution of the deflection characteristics of the moving coil, with feed sheets 26, 27, to which further, not in particular their linearization, lines shown can be connected, _ .... in leading connection. The feed sheets 26, 27 65 ratentansprucne. are placed on projections 28, 29 of the carrier 1, 1st core magnet moving coil instrument, in which to avoid unwanted rotations of the core magnet, the return ring and the out of the feed plates 26,27 a square cross-section made of plastic carrier by interlocking

slide are composed, characterized that the "carrier (1) made of plastic is formed in one piece and to form the slide-in bracket for at least one core magnet with two jaws (2,3) is provided, the circularly curved slots (5,6) to form a further slide-in holder for a yoke ring (7), the slide-in brackets on one side in Direction of the axis of rotation of the rotating coil (23) are open, and that the carrier (1) in the central area between the cheeks. (2, 3) a core magnet penetrating, for receiving the bearing (15, 18, 20) for the rotating coil (23) has the shoulder (13) serving, with a bearing can be adjusted via a bearing part (18, 19) that is adjustable in the approach in the axial direction. .

2. Instrument according to claim 1, characterized in that the adjustable bearing on one that can be screwed into the shoulder (13) of the carrier (1) by means of a threaded pin (18) Bearing flange (19) is seated. .

3. Instrument according to one of the preceding claims, characterized in that on Carrier (1), preferably on its jaws (2, 3), projections (28, 29) advantageously of angular cross-section are provided for attaching feed sheets (26, 27).

4. Instrument according to one of the preceding claims, characterized in that the Outer wall of the slot (5) of one jaw (3) by means of an annular segment-shaped core magnet (4) with the moving coil partially encompassing contact surfaces for the outer surface and an end surface of the yoke ring (7) forming walls (10) is extended.

5. Instrument according to one of the preceding claims, characterized in that one off two cup-shaped magnets composite core magnet is used and each Shell between a jaw and the neck of the carrier receiving the threaded pin is fixed. .

6. Instrument according to one of the preceding claims, characterized by a with a inner, approximately annular receiving space provided housing (31) into which the carrier (1) can be inserted is.

7. Instrument according to claim 6, characterized in that that the open top and bottom of the housing (31) by means of a cover each (46 or 47) is lockable and walls in the sides adjacent to the top and bottom of the housing (31) passage openings (54, 55) are provided for one feed sheet each.

8. Instrument according to one of the preceding claims, characterized in that the Housing a guide (34) for attaching a dovetail-shaped through angled ends has formed scale carrier (37).

9. Instrument according to claim 8, characterized in that for defining the scale support (37) on the housing a crossover made of transparent material Cover cap (40) is provided which can be pushed into grooves (41, 42) of the housing (31) and has the tabs (43), over which edges grip the cover placed on the housing.

10. Instrument according to one of the preceding claims, characterized in that the Plug connections are secured by gluing or welding.

1 sheet of drawings