DE1591515B2 - Holding device for disc-shaped piezoelectric bodies - Google Patents

Description

Devices according to the invention for disk-shaped piezoelectric bodies of different sizes shown. The piezoelectric body are provided on both sides with contact surfaces 4, which up to Edge of the body have reaching approach. The holding devices for these bodies consist essentially of straight lines or the curvature of the disk-shaped body 1 adapted sheet metal strips 2, the free ends 7 of which are so-called clips are slotted. With the edge points covered by the projections 5, the piezoelectric bodies 1 are inserted into the slot-shaped clips of the holding devices and electrically connected to them by means of an electrically connected conductive putty. This makes both an elastic mechanical and a good one causes electrical connection between body and holding device.

The piezoelectric bodies are in evacuated or filled with protective gas housings, of which only a side wall or base plate 8 is shown in the figure. This side wall is penetrated by contact pins 3. The contact pins are in this wall, for. B. by means of Glass seal attached. The piezoelectric body is connected via the contact pins to an electrical voltage source.

ίο The straight or curved sheet metal strips 2 that the actual mounting elements for the piezoelectric body are made up of the contact pins shaped in such a way that they each have a one-piece body together with such a pin form. There is therefore no need for any welded or soldered connection between a contact pin 3 and the actual mounting element.

1 sheet of drawings

Claims (1)

1 2 Additional brackets for quartz crystals are included Claim: which also the connecting wires at the same time as Holding organs for the quartz find use, Holding device for a substantially can be found in U.S. Patents 2,635,199 and disc-shaped piezoelectric bodies in 5,2677,064. In the holder known from the first both sides with electrically conductive concentric patent specification mentioned, contact surfaces are occupied, the diameter of which is the connecting wires, in order to be able to use them as holding elements at the same time as the disk diameter and to be able to use them, one end in a loop on each side up to Edge of the piezo-curved at least two screw turns, and electrical body-reaching approach aufwei- io it is the quartz disk with edge sections between sen, which is directed to the other approach opposite the turns of the connecting wires inserted, set with two made of sheet metal strips touching turn sections of the Connection-formed holding elements, which with their ends facing away from the wire electrically conductive coatings of the quartz, so piezoelectric body in that this is held by the connecting wires at the same time mechadically on a housing wall penetrating niche and electrically contacted,
and for the electrical connection of the piezoelectric device in US Pat. No. 2,677,064 Trical body with a voltage source previously known holder, angled ends of the contact pins seen are attached, so that each connecting wires nose-like in radially extending identity a holding element together with accessories of a quartz disk. The recesses in the contact pin of a one-piece body 20 are filled with silver paste which form the connections, characterized in that the connection between the connecting wires and the quartz produces the sheet metal strips (2) at their free ends (7) with washers. Two such connecting wires, one of which is facing the piezoelectric body (1), cooperate in this way with the th bend and in the angled quartz crystal between their ends,
chain area have slots into which the 25. like sections or the screw turns or the recesses on the quartz, relatively complex manufacturing steps. 30 In contrast, it is the object of the invention, of starting from these known brackets, a bracket that is further simplified in terms of manufacture The invention relates to a holding device which, in particular, has extensive tolerances is insensitive to a substantially disk-shaped. piezoelectric body, which is covered on both sides with electrically 35. To solve this problem, such a holding conductive concentric contact surfaces is provided, device according to the invention is designed in such a way, the diameter of which is smaller than the disk diameter, that the sheet metal strip is at its free ends with a knife and that on each Side a downward draft of the piezoelectric body facing the edge of the piezoelectric body are provided and have in the angled area, the opposite to the other approach 40 slots into which the body is directed with the two from Sheet metal strips gebil- approaches covered edge areas is inserted.
deten holding elements, which with their from the piezo In this way a holder is created, Electrical body facing away ends in the manner in which to form the capture the quartz a housing wall penetrating and only uncomplicated manufacturing trays to the electrical holding elements Connection of the piezoelectric body 45 steps are required, namely compared to the z. B. with a voltage source provided contact known from British patent specification 836 630 pins are attached that each have a holding element bracket, just a simple punching process for together with the associated contact pin, a generation of the slots in the sheet metal strips and a form lumpy bodies. this punching process subsequent kinking of the A holding device of this type is, for. B. from the 50 holding elements in the area of the slots, while at British Patent 836630 known. In this the known bracket in an arcuate known Holding devices are one of the curved areas of the holding organs, a channel housing wall effective bottom plate penetrating shaped formation of these organs, which manufacturing connecting wires for a quartz crystal, on the other hand, it is technically difficult to manufacture within Housing end to channel-like sections 55 must be seen. th molded and form with these sections un- The holding device according to the invention brings indirectly suitable for holding a quartz oscillator with the further advantage that by Abnete Organs in which the side walls of the gutter-like strips of a spatula-like tool, which with Grip around the edge of the quartz in sections. a conductive adhesive has been applied to the In this way, in addition to the region of the holding elements angled as a holding device 60, a single element is formed effective connecting wires no further fold introduction of conductive adhesive in this than additional holding means for the quartz needed, where-effective receiving space from the piezoelectric by a substantial simplification these bodies turned away from the thighs of the Abwin known Quartz holder with respect to such a holder is enclosed area and thus an unrung results in which the electrical connection 65 complicated conductive adhesive connection between Haltedes Quartz and its mechanical support of elements and piezoelectric body is possible. different elements made from one another. The invention is described below with reference to several will. Figures explained in more detail. In the figures are holding