DE1925945C - Impact device for a piezoelectric element - Google Patents

Description

The invention relates to a pushing device for a piezoelectric element with at least a hammer for striking the piezoelectric element, with a drive spring for the hammer, with an actuating device for tensioning the drive spring against the hammer and for the subsequent Release of the hammer to move in the direction of impact and with a reset device for the hammer and for the actuator.

It is known that a piezoelectric element generates a high voltage when it is passed through a Impact force is excited. It is also known that an arc discharge between two electrodes at high Voltage generates an electrical signal.

A signal transmitter can be created by using the two above-mentioned certificates. in which two electrodes are arranged at a desired distance from one another and an electrical one Generate signal by arc discharge when so biased by a high voltage generator containing a piezoelectric element.

F. in such signaling devices is often used! in controlling electric toys, and Such an arc discharge is also used to ignite the fuel in a cigarette lighter or from town gas.

By the German utility model 1 929 508 is a pushing device for a piezoelectric Element of A mentioned at the beginning; t known. This device has a piezoelectric element, a hammer, springs and a drive rod. Actuating the actuator stem once triggers a Impact force on the piezoelectric element and creates a single arc discharge. An electric one Signal due to this arc discharge has no specific frequency characteristic that is selective with can be coupled to a receiver circuit in the toy. Therefore, a conventional one, with such a simple signal transmitter coupled receiver circuit inadvertently by any other unwanted signals are actuated by an arc discharge in automotive ignitions or caused by electrical contacts between different electrical devices.

In addition, this single arc discharge is not always sufficient for each actuation of the device ensure the ignition of the gas.

The invention is based on the object of a high-voltage generator with one of a shock device beaten piezoelectric element to create several, in a given time Generate spacing of successive high-voltage pulses. The impact device should generate several high-voltage pulses per operation to strike the piezoelectric element, whose time interval can be set precisely. Furthermore, the shock device is intended for Hitting the piezoelectric element generates a specific electrical signal.

In an arrangement of the type mentioned at the outset, this object is achieved according to the invention by two Hammers released with a drive spring each and a locking device for the second Hammer, such that with each actuation of the actuating device, the second hammer only after the strike release for the first hammer automatically depending on the striking movement of the ci'3'.cn hammer to produce a on the first hammer blow released after a predetermined time following the second hammer blow

On the basis of the drawing, several examples are given the invention explained in more detail.

pig. 1 shows a view of an a according to the invention Embodiment in normal position;

Fig. 2 shows an elevation of the guide housing with partial cutouts, the guide housing of the embodiment according to the invention is removed;

Fig. 3 shows an elevation of the operating member used in the embodiment of the present invention is removed;

F i g. 4 shows an elevation of the actuating part with partial outbreaks;

5 shows a state of the embodiment in which the actuating part is pushed into the guide housing by a predetermined amount A , whereby the energy required to strike the piezoelectric element is provided to it, and one of the hammers is at the point of unlocking;

Fig. 6 shows another state of the same! Execution form in which one of the hammers covers a predetermined amount B and another hammer is at the point of unlocking;

F i g. Figure 7 shows an elevation of another according to the invention Embodiment;

Fig. 8 shows a state of this other embodiment in which the operating part is pushed into the guide housing by a predetermined MaRA ' , thereby imparting the energy required to strike the piezoelectric element, and one of the hammers is at the point of unlocking;

F i g. 9 shows another state of the embodiment, in which one of the hammers travels a predetermined amount B 'and another hammer is at the point of unlocking;

FIG. 10 shows an enlarged section from FIG. 7 along line 10-10;

Fig. 11 shows a further embodiment with Outbreaks;

Fig. 12 shows the course of these embodiments generated voltage pulses;

Fig. 13 shows a schematic view of a Transmitter having the remote control system according to the invention;

Fig. 14 shows a schematic view of a novel Gas igniter having an impact device according to the invention.

Referring to FIGS. 1 through 6, a jogger 20 according to the present invention is illustrated with reference to FIG Construction and operation are explained.

A lower and an upper housing 24 and 26 are connected to one another by means of screws 28 and 30 and form a guide housing 22 in the form of a square body which is slidable with an operating part 60 matches.

The guide housing 22 is provided on the bottom with a ski cover 32 and has a piezoelectric Element 34 trapped therein in such a way that it abuts screw 32. The cylindrical piezoelectric element 34 has attached thereto on the opposite surfaces Metal plates 36, 38 and in the middle a conductor 40. This conductor 40 serves as an electrode, and the

Metal plates 36 or 38 serve as other electrodes, the release pin 74 together with the recess 44 for arc discharge. menwh kt.

One in contact with the piezoelectric element The following description will explain the operation

located return spring 42 is explained by a front of the shock device 20 according to the invention,

jumping portion 41 of the piezoelectric 5 When the actuating part 60 around the in Fig. 5

Element 34 and a protruding portion shown is displaced dimension A , prevent the with

50 of the lower housing 24 out. The guide the recesses 44 and 46 cooperate

Housing 22 hnt recesses 44 and 46 for locking release pins 74 and 76, the hammers from it to

lock and move a fiih formed on one side,

rungskante 48. "io In this state, the first spring 64, the

In Fig. 3 and 4, a side view and a second spring 66 and the return spring 42 together -

Interior view of the slidably pushed into the guide housing 22. The first release pin 74, which is through the

show fitted actuating part 60 is one with rotational force of the first spring 64 to the ground

A block 61 connected to a unit central - the recess 44 is depressed is through

rod 62 by means of the screws 63 and 65 at 15 a formed on the actuating part 60 beveled

attached to one end of the actuating part 60. Edge 78 protruded from the first recess 44

A first drive spring 64 is pushed between one.

The first hammer 68 and the block 61 are arranged and therefore in the next moment the first drive is pushed back on the inside of the actuating part 60 by the _{release: (} release44, hold. The first drive spring 64 is so connected to ao and the first hammer 68 triU inside through the heath ends with two in the first hammer 68 return spring 42 and hits as a result of) zw. the block 61 formed small holes spring force of the first spring 64 force ^: g on that together that the first hammer 68 in F i g. 3 and 4 metal plates 38 of the piezoelectric element laugh to the left and a first release pin 74 downwards 34 on. If the first hammer has moved 68 to the are in pressed down by the rotating force of the first 25 FIGS. Dimension B shown 6, the second • Eder 64. Since the first Ausrückstift 74 with a Ausrückstift 76 of by the beveled edge 70 is. When the first hammer 68 formed in the guide housing 22 cooperates from the second recess 46, the first hammer 68 is pushed out. A moment after the time point of FIG. 6, the normal position shown in FIG. 1, the second hammer 72 becomes old as a result. 30 moves the spring force of the second spring 66 and follows

The central rod 62 has a cylindrical, sliding first hammer 68 and strikes the first

nd attached second hammer 72. The second hammer 68 vigorously on the piezoelectric egg-

;> ammer72 is fixed with a second release pin element 34.

"? 6 provided. A second drive spring 66 is when the compressive force on the actuating part 60

I is removed between the second hammer 72 and the 35, the operating part 60 is through the

Hlock 61 and »v is guided by the central rod 62. Return spring 42 pushed outward. The first

The second drive spring 66 acts in this way on both release pins 74 from that on the actuation part 60

l.nds with two vertical ends 80 formed in the second hammer 72 or respectively and a hurizon-

The small holes formed in each block 61 are guided to the bottom edge 43 and return to the recess 44

together that the second hammer 72 in Figure 4 goes back to 40. The second release pin76 is from a

! inks and the second release pin 76 downward vertical edge 82 and a widened edge 45

: it is depressed by the torsional force that leads and returns to recess 46. Closing

The first release pin 74 and the second fall

Since the second release pin 76 with a second release pin 76 as a result of the rotational force of the first

in the guide housing 22 formed recess 46 45 spring 64 and the second spring 66 into the recess

cooperates, the second hammer 72 in the gene 44 or 46 into it,

normal position of Fig. 1 held. Therefore, the operating part 60 does not have any

The first hammer 68 is slidable on the further outward movement and returns to the in

i wide hammer 72 fitted and has a slot F i g. 1 normal position shown.

69 with a beveled edge 70. which extends along 50.

in the axial direction. The second release housing 22 corresponding to the one shown in FIG. 1 shown

The pin 76 protrudes through the slot 69 and acts with the position being pushed in, the hammer 68

second recess 46 together. The first off and 72 temporarily stopped so that the first

Return pin 74 is fixed to the first hammer 68, spring 64, the second spring 66 and the return spring

bound. 55 42 are squeezed together.

The release pins 74 and 76 are in the manner set out in the explanation above,

Fig. 3 in the state shown in Fig. 2 causes actuation of the actuating part 60 of the

The state shown guide housing 22 impact device 20 that the piezoelectric element

inserted, being hit twice by the leading edge 48.

leads to be. In this way, under the action of hammers 68 and 72, the guide 60 is

housing 22 easily with the actuating part 60 to which the piezoelectric element 34 generates high voltages

in Fig. 1 connected to the normal arrangement shown. gen between the conductor 40 and the metal plates

The return spring 42 extends between the 36 or 38, like the timing diagram of FIG. 12

vertical end 80 of the actuating part 60 and the shows.

protruding portion of the lower housing SO 65 Fig. 12 shows that the first and the second pulse of the guide housing 22 and presses the actuation and have a high voltage of about HkV part to the outside. The actuating part 60 is separated from each other by a time interval of about 4 ms Fig. 1 held normal position shown because are removed.

The output voltage of the piezoelectric section 118 is an amount £ from the center of a

Element 34 can be removed under the control of the impact force screw 116, which is attached to lever arm 106 bc-

become the hammer that is dependent on who is fortified.

Compression force of springs 64 and 66, as in FIG. 5. The reciprocating lever 100 is provided with a

is shown. Because of this, the output voltage can be 5 beveled edge 104 and one horizontal

strand by the local arrangement of the beveled edge 102. One on lever arm 106

Edge 78 can be determined and not restricted by the formed lock 108 the movement of the

Thrust of the operating lever 60. reciprocating lever 100 clockwise

The time interval between two pulses makes sense.

Time interval between the strikes of the two hammers io An actuating part 60 'has a first hammer,

68 and 72. In the case of FIG. 5 given to- a second hammer, a first spring, one in it

stand begins to move the first hammer 68 included second spring has a beveled

and strikes the piezoelectric element 34, edge 78 'and is displaceable in the guide

within a certain time, which is arranged by the housing 22 '.

! Weight of the first hammer 68 and through the 15 release pins 74 and 76 'on the first hammer and

Pressure force of the first spring 64 is predetermined. act on the second hammer with the

■ In the case of the by F i g. 6 state shown begins housing 22 'formed recesses 44' and 46 '

¹ the second hammer 72 to move and strikes together.

within a certain time by means of the first

Hammcrs 68 on the piezoelectric element. The ao direction 20 'is explained.

second hammer 72 starts every time the first when the actuating part 60 'by the amount / i' from

Hammer 68 traveled a certain distance as shown in FIG. 7 compressed position shown

¹ , which is determined by the height of the beveled edge 70, ν 'start the one with the recesses 44' and

is determined. 46 'interacting release pins 74' or 76 '

'Therefore, the time interval between the as cannot cause the two hammers 68' and 72 'to get into

• Strike the first hammer 68 and that of the second movement to set and the first spring 64 '. the ' hammer 72 are kept constant, independently of the second spring 66' and the return spring 42 'together

! from the actuation speed of the actuation to push.

tciIcs60. ^'M the next moment, the first Ausriuk-

'The output voltages of the two pulses and 30 pin 74' through the beveled edge 78 'from the

! the time interval in between show a small recess 44 'pushed out, and then the runs

'Dispersion with repeated actuation of the whole first hammer due to the compressive force of the first

i! Impact device 20. Spring 64 'against piezoelectric element 34'.

'In the case of the by F i g. 1 normal position shown when the first hammer 68 'by the dimension B'

¹ the piezoelectric element 34 is always run through 35, the first release pin 74 'pushes the abc-

I pressed the return spring 42 against the screw 32. beveled edge 104 of the reciprocating

>'The distance between the piezoelectric lever 100 down and expresses the second expression

"Element 34 and hammer 68 can be rotated backwards 76 'out of the second recess 46'.

^: 'of screw 32 can be adjusted. A moment after that shown in FIG

* Usually the first hammer has 68 and 4 ° point in time the second hammer follows the first -i the second hammer 72 a moment after the hammer and hits the piezoelectric E time shown in Fig. 6 different element.

a Movement speeds. If in Fig. 10 the nut 114 is loosened and the

d If the second hammer 72 is rotated a higher eccentric axis of rotation 110 by 180 °,

g has speed than the first hammer 68. be 45 is the beveled edge 104 of the back.

β has the effect of enlarging the range of motion of the movable levers furthest from the horizontal one

1 both hammer that the time interval between the edge 43 * removed. The first Ausröckstift 74 'solves the

t becomes two pulses shorter. When the second hammer second release pin 76 ' out of the second recess

c 72 has a slower speed than the first 46 'after traveling a greater distance

Hammer 68. makes an enlargement of the Bcwc-50 as // '. In this case you can do the longest

1 gungsbcrcielics of the two hammer the time interval time interval between the blow of the first

* longer. Hammer 68 ' and that of the second hammer 72'

J Therefore, a tolerance can be targeted in the time interval.

'7V. ical two pulses due to the properties as set out in the explanation above

ϊ the spring by turning screw 32 less than 55 the time interval between the two high-voltage

'· be made. impulses by turning the eccentric axis

i Referring to Fip. 7. 8. 9 and IO should be set to 110. The setting of the conversation

Another embodiment of the impact direction inteivalls ranges from 3 ms to 6 ms.

20 'are explained. i> ic Fig. 11 shows another embodiment

A Fühningsgchäusc 22 ' with a picznclektri- 60 dci pusher 20 "in the normal position.

The stnfU nt direction has an attached to it

hnlletlcr 42 and recesses 44 ' and 46'. piezoelectric element 34 "and a

Fin Ilehehirm 106 is on the filler housing c22 'bat anoidncten first hook 44 " and second

attached and has an eccentric hook 46 "at ilu Ivlestiptc. A Bcdicnhebcl 60" is together with

Dieh.iehse HO. 65 an ice Schumi hammer 68 " and a second

5 in hin-kik! Iwrbewepüel! · ¹ ·! MvI 100 »si« lirlihai SeliwenLhamiin 1 72 "rotatable on an axis

atil «Ui vx / cnlrtschcn DichaeliM · UO anuenulnet and Ivlestipl. I in the leg spring 64 "is between

(hitch a Seheibe 112 gesieheil 1 in Dteh / aplcn «1> in eisun Sehwenl hammer 68" and the operating

_S t; Ä; Ä =

1 «one two .. ScncnUKedcr 5 68" through the Oiftcren,, gave way to the two mares fä 'lÄÄÄ ^ i.' »De. Stm, 3»

^lial , """' u " ^ _m RoHionhehcl 60 "and the line between the operating unit OT una °.

S «uTto ^ BeSSd 2r and both

lines to oen u Eczeictc

lammer 6β and 72 ind.e> n F.g.ll shown

normal position: f "™ ^! ¹ ™ ¹ · _{cWldctc Spcrrc 149}

. · ^ ^A HR SinebeUO "on the contrary prevents the operating lever 60 from moving contrary to α

Uhrzc.gcrs.nn to turn; ^; " ^s ^» ^{ken 4} J ° ^r J as a result of a spring 144 ι!)
on the first swing! ammeri68

on the first

46 "rotates as a result of one

The operating lever 60

crÄken4?

tikSSTlSSte

Driftbore

Mistake

_{from the}

first SchwcnK, “mmcr 1"

S.Ä..r "^ ^ tnd ^^ TrebSo schiäärauT "d7r" first "" stage of a shift lever 129 nuf the rotatably aTf a shaft 134 is arranged

two high voltage pulses generated by the piezoelectric element. An experiment with the pusher 20 "'of FIG. 1 shows that a Zcitinter-

is vall from 3 ms to 4 ms can be achieved.

_{S pusher device for a} piezoelectric

Element 20 according to the present invention can

be constructed with small dimensions, and

Time interval between the two high voltage _impu | _scn can be easily and sensitively adjusted by turning the screw 32.

_Another advantage of this shock device is that the guide housing 22 and the operating part 60 are separated from one another and both are exchanged

> 5 can be replaced by a new part, if it is not,

An ^ tcrer advantage of the invention is that the Inside of bedicntcil 60

is guided and the second spring 66 ^, the central rod " Such a construction on aer Mouvorr.cn-

prevents the springs from buckling,

^ Ι 34 guess the first hammer 68 and

4o

₄₅

^^^^^: tc, the arrow If the control lever 60 m the ^ by ^ en PeU

is rotated in the direction shown at C (Fig. U), if the leg springs 64 and 66 are bent and the return spring 42 "8" * "^" ^ hammers 68 "and 72 by the hooks 44 and 46" be temporarily stopped Another rotation of the "
through the vertical edge
Direction of the arrow Pzu ^

himself ^de ^^ ^l % ^Sc . ^hw .7t ^ha rSS _u S of PfST F about hook 44 "and 1 rotates in J '™ ¹ ""« ° «' JJ ^ .; _f

The drive pin 148 strikes the piezoelectric? T ^ V hWbewrt like this Element 34 ^^ l ^ 'T J) that the second on the lever I29 aul ^ so aaö °

SStJS SeiSS ScSwenkh ™ er

^^ Äpt ^ rfdiMetanpffittchen38 "after the 72 hits the metaupw

_{first swing} hammer «f am

When the force on the leg lever M subsides the Schwenkhammejr6ff ^ and 72 ^ the SperreSO "r of the R" ^ ^h ^ 42 ° lfede ™ rotate counter dMUhmg from the hooks 44 and 46 in the position shown m recorded.

By pressing a push button. I4iI narfi hnte a pin 138 through a lever 142 "g and pushes the shift lever 129 to the": _{can the Zcilinterva} " _{between the} _

_High - _on ; _{dissolve within wide} limits- ^^ ^ ^^ ^ _{eKcm | ical axis}

_no . _{In addition} , the first hammer of a

with a beveled edge to give away.

_T he pusher 20 "is characterized by _different time intervals between the Hochsnannungsimpulsen. Such a pusher may be used ais a signal generator capable of generating two _{Arlcn e} i _cktris cher signals.

All of these pushing devices make it possible Generate high voltage pulses that are constant Have output voltages and independent of of actuation. «- force and speed by one constant time interval apart.

The following description will be a remote control explain the novel inventions Having high voltage generator.

In Fig. 13, numeral 20 denotes the shock m g _e . _{ne th electrode}

in front ι ^. _Hemen * _{16 (| {st a spark} ^

ξ _recke , _{ond 164} is an ImpedanT. The impedance has the task of causing the emission of an electrical signal from an antenna 168, which with. Electrode of the spark gap 160 over the

If the operating lever is 60

Direction of the ^. _{Spark gap} of about 1 rran length shows ^^ _the y ^, ^ _{v £ m} ^^ _{high voltage} .

pulse an arc discharge and generate an electrical signal with the aid of antenna 168.

SRh an electrical signal can be sent by a

309621/317

is
E.
V
egg
egg

Receivers are selectively received, the one corresponding to such an electrical signal electrical Has circuit. Such remote controls do not require an electrical source and are much cheaper than conventional transmitters.

The following description explains a fuel igniter employing the novel pusher of the present invention having.

In Fig. 14, numeral 20 denotes an inventive one Impact device for a piezoelectric element, and an electrode of the piezoelectric Element is connected to a spark gap 160 via an impedance 194. A grounded Electrode is connected to another electrode of spark gap 196. A fuel container 190 is connected to a nozzle 192 via a valve 188. The nozzle 192 is arranged next to the spark gap 160. The actuating part of the pushing device 20 is provided with a pin 180 to which a lever 182 is coupled, the lever 182 being rotatably mounted about an axis 184.

Movement of the lever 182 is transmitted to the valve 188 via a connector 186. When the actuating part is pressed, a discharge arc is generated between the spark gap 160 as generated. The connector 186 causes the valve 188 to supply the nozzle 192 with fuel, to be lit. One operation of this jar produces multiple sheet charges and ensures perfect ignition 198 of the fuel.

Since the shock device according to the invention is independent of the operating force and speed between several high-voltage pulses with constant output voltage and adjustable time interval generated them, the jar can be adjusted to ignite the fuel and works as an excellent igniter for gas, regardless of the actuation

wise.

Claims (8)

Patent claims: 1. Impact device for a piezoelectric element with at least one hammer for striking the piezoelectric element, with a drive spring for the hammer, with an actuator for tensioning the drive spring against the hammer and to connect ßenden release of the hammer to move in the direction of impact and with a reset device for the hammer and for the operating device, identified by two hammers (68, 72) each with a drive spring (64, 66) and a locking device for the second hammer (72) such that with each actuation of the actuating device the second hammer (72) only after the impact release for the first hammer (68) automatically depending on the striking movement of the first hammer (68) to generate an on the first hammer blow released after a predetermined time following the second hammer blow will. 2. Shock device according to claim 1, characterized by an adjusting device for the Distance between the face of the piezoelectric element (34) and the hammers (68, 72). 3. Shock device according to claim 1, characterized by such storage of the Hammer (68,72) that they can be moved along a straight line. 4. Impact device according to claim 1, characterized by such storage of the Hammer (68 ", 72") that they can pivot. 5. Shock device according to claim 3, characterized in that the locking device for the second hammer (72) one in the striking position of the first hammer (68) of the latter has actuatable lever (100) by means of which the second hammer (72) can be released. 6. Impact device according to claim 5, characterized by an adjusting device for the Pivot point of the lever (ICO), consisting of an adjustable eccentric bearing of the axis of rotation (110) of the lever. 7. Impact device according to one of claims 1 to 6, characterized by the use for the piezoelectric element of a signal transmitter, which is connected to an antenna via a spark gap (160) (168) is connected for signaling. 8. Impact device according to one of claims 1 to 6, characterized by the use for the piezoelectric element of a gas lighter with a spark gap (160) for Gas ignition is connected 1 sheet of drawings