EP3282193A1

EP3282193A1 - Switch embodiment for cooker units

Info

Publication number: EP3282193A1
Application number: EP17185437.5A
Authority: EP
Inventors: Ali Erkan MAMUR
Original assignee: Ferel Elektronik Sanayi ve Ticaret AS
Current assignee: Ferel Elektronik Sanayi ve Ticaret AS
Priority date: 2016-08-09
Filing date: 2017-08-09
Publication date: 2018-02-14
Also published as: TR201611141A2

Abstract

Invention relates to a switch (60) to be mounted on gas taps (90) of electronically or manually controlled and LPG and NG operated all heater, cooker devices and operating dependant on tap motion and applying electric energy to ignition system, consisting of a main frame (10) whereon all components are mounted, an upper part (20) constituting an upper section of the switch (60) and providing location thereof on the gas tap (90), a hub (30) allowing electrical opening-closing of the switch (60) by motion of a gas tap spindle (93), a contact mechanism (40) controlling electric current passing by means of motion of the said hub (30), a gas tap (90) whereon it is mounted.

Description

THE RELATED ART

Invention relates to switches mounted onto gas taps of electronically or manually controlled LPG and NG operated all heaters, cookers (home and industrial type ovens, furnaces, combi boilers etc.) and driven by tap movement and applying electric energy to ignition system.
The invention particularly relates to enhancement of pressure force between contacts, strengthening contacts touching and stabilizing contact angle between switch and contact by means of providing immediate, quick and impact shape change of contact moving in contact mechanism controlling electric current passing through switch.

BACKGROUND OF THE RELATED ART

Today switches are used in electronically or manually controlled LPG or NG operated heaters, cookers (home and industrial type ovens, furnaces, combi heaters etc.) to supply energy to ignition unit used for igniting gas. The said switches in general consist of contact mechanism located between an upper cover and a lower cover, and gas tap providing motion of the said contact mechanism. Contact mechanism is the mechanism which controls electric current passing by means of contacting and separation of moving parts located therein with each other upon motion of gas tap.
In the present applications, problems of no contact in contacts of switches are experienced. Upon inspection it is seen that adequate pressure is not applied to contacts allowing pass of electric current, that the contacting surfaces of the contacts expose to oxidization, blackening, wearing due to arc occurring during process of switching, and therefore, switches fail to function and such problems are frequently encountered as complained by end users.
In conclusion, new switch embodiments for applying new solutions eliminating the above disadvantages are needed.

PURPOSE OF THE INVENTION

The present invention relates to switches meeting the needs mentioned above, eliminating all disadvantages and providing some additional advantages.
Main purpose of the invention is to enhance pressure force between contacts, to strengthen contacts contact and stabilize contact angle between switch and contact by means of providing immediate, quick and impact shape change of moving contact.
Another purpose of the invention is to increase the pressure force between contacts and thus to prevent problems of no contacting.
A further purpose of the invention is to reduce the contact surface on the fixed contact and thus increase the contact pressure.
Another purpose of the invention is to prevent oxidization, blackening and wearing between contacts by means of providing immediate and impact contact between contacts.
In brief, the purpose of the invention is to disclose a well established switch embodiment preventing the problems arising out of no-contact and metal breaking by help of all those said new characteristics explained above.
The structural and characteristics features of the invention and all advantages will be understood better in detailed descriptions with the figures given below and with reference to the figures, and therefore, the assessment should be made taking into account the said figures and detailed explanations.

BRIEF DESCRIPTION OF FIGURES

In order to make the embodiment and additional members being subject of the present invention as well as the advantages clearer for better understanding, it should be assessed with reference to the fallowing described figures.

Figure 1 is an illustrative view of electric circuit diagram of parallel connected switch of the invention.
Figure 2 is a perspective view of demounted switch of the invention.
Figure 3.1 is view of angular position (β=0') of hub controlling on/off positions of the switch of the invention in the beginning.
Figure 3.2 is view of angular position (β>0 position) of hub controlling on/off positions of the switch of the invention.
Figure 3.3 is the view of the switch of the invention when the moving contact end contacts the fixed contact end.
Figure 3.4 is the view of the switch of the invention when the hub returns to its former position upon springing of the "V" shape terminal extension of the moving contact releasing from pressure due to rotating tap spindle.
Figure 3.5 is the view indicating position when the switch of the invention has no contact during movement of hub in counter direction of tap spindle rotation, that is, no contact when hub is rotated in clockwise direction.
Figure 4 is a detailed view of thrust pins located on internal surface of top part of switch disclosed hereunder.
Figure 5 is a perspective rear view of top part of the switch disclosed hereunder.
Figure 6 is view indicating combination of more than one switch of the invention interconnected in serial.
Figure 7 is general view indicating the position where the switch of the invention is mounted on gas tap.

REFERENCE NUMBERS

10. Main frame	40. Contact mechanism
11. Moving contact housing	41. Cable ducts
12. Hub casing	42. Fixed contact
13. Fixed contact housing	43. Moving contact
14. Cable ducts	44. Moving contact thrust extension/bulge
15. Base extensions	45. V-form thrust extension
16. Locking tabs	46. Moving contact base ends
20. Upper part	47. Moving contact touch end
21. Locking housings	48. Fixed contact touch end
22. Hub casing internal part	49. Narrow surface
23. Thrust pins	60. Switch
30. Hub	70. Sequential switch group
31. Thrust extension	80. Electric cables
32. Gas tap neck	90. Gas tap
34. Thrust extension reaching angle	91. Gas tap frame
	92. Gas tap knob
	93. Gas tap spindle

The drawings are not necessarily to be scaled and the details not necessary for understanding the present invention might have been neglected. In addition, the components which are equivalent to great extent at least or have equivalent functions at least have been assigned the same number.

DETAILED DESCRIPTION OF THE INVENTION

In this detailed description, the preferred embodiments of the igniting switches (60) being subject of the invention have been described in a manner not forming any restrictive effect and only for purpose of better understanding of the matter.
Figure 1 show an illustrative view of electric circuit diagram of more than one switch (60) connected in parallel. The said switch (60) is opened-closed and passing or cutting of electric current between N-L points shown illustratively is provided. The said switches (60) operation is dependant to gas tap (90) motion where it is mounted, and gives electric to ignition system.
Figure 2 shows exploded perspective view of switch (60) disclosed hereunder. Fixed contact (42) made of special alloy phosphorous bronze and supplying electric current is mounted on fixed contact housing (13) located on main frame (10) made of plastic materials resistant against strokes and heating while moving contact (43) is seated on the moving contact housing (11) located on the main frame (10). Silicone coated electric cables (80) conveying electricity sit into cable ducts (14) on the main frame (10) and provides tight connection to cable mounting ducts (41) on the fixed contact (42) and moving contact (43) and thus provide conductivity. Hub (30) exposed to pressure upon rotation of moving contact (43) is sit into hub housing (12) on the main frame (10). Upper part (20) used to fix (position) the switch (60) to gas tap (90) is mounted to press from top to keep all components together. Also thrust pins (23) located on upper part (20) are pressed onto silicone coated electric cables (80) and provide tight contact of fixed contact (42) and moving contact (43) with conductor in the electric cables (80). Figure 4 shows the picture indicating thrust pins (23) located on inner surface of the upper part (20) made of plastic material. Thus, the mounting process of the switch (60) is completed.
Figure 5 shows perspective view of switch (60) disclosed hereunder. Figure 6 shows sequential switch group (70) where it is connected to electric cables (80). Being a component of cooker unit, the gas tap (90) is adapted to tap neck (32) space. Mechanism is triggered by means of hub (30).

Operating principle:

The operation principle of the said switches (60) is as follows: one or more than one switch (60) is mounted in parallel to each other and sequential switches groups (70) are formed as shown in Figure 6. Then switch (60) is fit onto gas tap (90) by means of gas tap neck (32) made in a manner fitting gas taps. Figure 7 is the view of switch (60) disclosed hereunder in the position where it is mounted to gas tap (90). The gas tap spindle (93) of the gas burner desired to be burned is rotated in clockwise direction by means of gas tap knob (92). When the gas tap knob (92) rotates the gas tap spindle (93), it also rotates the hub (30) of the switch (60) having that gas tap (90). The hub (30) rotates together with and in the same direction as the gas tap spindle (93). The angular change occurring in switch (60) hub (30) with rotation of the gas tap spindle (93), positions and shape changes of fixed contact (42) and moving contacts (43) are shown in figures 3.1, 3.2, 3.3, 3.4 and 3.5.
Angular position of the hub (30) in the beginning is shown in Figure 3.1. In the beginning β=0. After hub (30) is over a certain angle (β > 0) upon rotation motion (Figure 3.2) pressure is applied to moving contact (43) through thrust extension (31) on the hub (30) via thrust extension (44) of the moving contact. Meanwhile, it remains in a position where it leans against thrust extensions (15) located on main frame (10) by means of contact touching ends (46) located on terminal extension (45) in V-form of moving contact (43). The moving contact (43) is pressed down as a result of pressure applied via pressure extension (44) of moving contact (43) on the hub (30), and the moving contact (43) standing on base extensions (15) located on the main frame (10) is tightened after springing downwards over the moving contact base ends (46). When rotation is over a given point, it will not resist the pressure and transforms and bends down immediately. Moving contact (43) changes form immediately upon bending motion. As a result of immediate form change, moving contact (43) changes its position and makes an impact contact with fixed contact (42). As shown in figure 3.3 moving contact touch end (47) contacts the fixed contact touch end (48) having narrow surface (49) structure thereunder.
The switch (60) can also be operated together with a gas tap (90) operated in clockwise direction. Way of operation is similar and it is provided by means of making reaching angle (34) of thrust extensions (31) having entrance and exit in and from moving contact thrust extensions (44) in opposite direction.
When the tap spindle (93) is rotated, the gas passes through the pipe and goes to burner, also when the contact is provided, the switch (60) transmits energy to lighter and the operation is completed with gas ignition. After contact is established, the movement of moving contact (43) stops. Movement of the hub (30) continues with motion of tap spindle. After the fixed contact (42) and moving contact (43) contact, the hub (30) moves in a manner to meet the motion space in rotation direction of tap spindle (93). Meanwhile, moving contact (43) released from the pressure thereon (Figure 3.4) returns to its former position and shape upon springing of terminal extension (45) in V-form, and contact ends. If the hub (30) is rotated in the opposite direction (clockwise) from this position, the embodiment of the trust extension (31) on the hub (30) does not allow re-contact between the moving contact (43) and the fixed contact (42). When the hub (30) is rotated in opposite direction, thrust extension (31) on the hub (30) lifts the moving contact thrust extensions (44) of the moving contact (43) in opposite direction of fixed contact (42) and provides no contact when the hub (30) is rotated in clockwise direction (Figure 3.5).

Claims

A switch (60) embodiment to be mounted on gab taps (90) of all heater, cooker devices electronically or manually controlled and LPG and NG operated, consisting of main frame (10), operating dependant on tap motion and applying electric energy to ignition system and having all components mounted thereon, an upper part (20) constituting upper section of the switch (60) and providing location thereof on gas tap (90), a hub (30) allowing electrical opening-closing of the switch (60) by motion of a gas tap spindle (93), a contact mechanism (40) controlling electric current passing by means of motion of the said hub (30), a gas tap (90) whereon it is mounted and it is characterized in comprising;
• a fixed contact (42) positioned in the said contact mechanism (40), sitting into fixed contact housing (13) located on the main frame (10) and made of alloy phosphorous bronze and providing electric current,

• a moving contact (43) positioned in the said contact mechanism (40), sitting into moving contact housing (11) on the main frame (10) and providing electric current upon contact with the said fixed contact (42),

• at least one moving contact thrust extension (44) applying press onto moving contact (43) by means of thrust extension (31) on the hub (30) upon rotation motion (β >0) of the said hub (30),

• v-form thrust extension (45) starting/ending contact with fixed contact (42) by providing springing action of the said moving contact (43),

• at least one moving contact base end (46) starting/ending contact with the fixed contact (42) by providing springing of the said moving contact (43) together with V-form thrust extension (45),

• at least one base extension (15) formed on the main body on which the said V-form thrust extension (45) stands and provides springing.
A switch (60) embodiment according to claim 1 and it is characterized in comprising of a moving contact housing (11) wherein the said main frame (10) is positioned and moving contact (43) sits.
A switch (60) embodiment according to claim 1 and it is characterized in comprising of a hub housing (12) on the main frame (10) wherein the hub (30) sits.
A switch (60) embodiment according to claim 1 and it is characterized in comprising of a fixed contact housing (13) wherein the said main frame (10) is positioned and the fixed contact (42) sits.
A switch (60) embodiment according to claim 1 and it is characterized in that the said moving contact (43) consists of at least one moving contact touch end (47) where the fixed contact (42) touches.
A switch (60) embodiment according to claim 1 and it is characterized in that the said fixed contact (42) comprises of at least one fixed contact touch end (48) where the moving contact (43) touches.
A switch (60) embodiment according to claim 1 and it is characterized in comprising of a narrow surface (49) formed on the said fixed contact (42) for touching.