EP0365507A2 - Device in foot-operated switches - Google Patents
Device in foot-operated switches Download PDFInfo
- Publication number
- EP0365507A2 EP0365507A2 EP89850353A EP89850353A EP0365507A2 EP 0365507 A2 EP0365507 A2 EP 0365507A2 EP 89850353 A EP89850353 A EP 89850353A EP 89850353 A EP89850353 A EP 89850353A EP 0365507 A2 EP0365507 A2 EP 0365507A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- switch
- base plate
- casing
- cord
- operating means
- 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- Withdrawn
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
- H01H3/14—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for operation by a part of the human body other than the hand, e.g. by foot
Definitions
- the present invention relates to foot-operated switches and more particularly to an operating housing for a switch arranged on the electric cord itself (hereinafter designated "cord switch") whereby a foot-operated switch is achieved.
- a type of cord switch which is generally available is of the push-type, where a spring-biassed pin projects from a housing, current being switched off and on for alternate depressions of the pin.
- the conductors In the actual switch constituting a part of the cord switch, the conductors must be fastened in the complicated way mentioned above for foot-operated switches, and even though there are such cord switches built into different types of housings for operation as foot-operated switches, there are many work operations which must be carried out, which results in a comparatively expensive final product.
- the cord switch which is at present most usual is of the push-button type with an actuating part inserted in a small housing, this part being rocked about 30° for each operation, such as to close in one position and open in the other position to interrupt the current through the switch.
- This type of switch is simply made and is molded or heat-sealed directly on to the cord purely mechanically and it is not openable or exchangeable. A cord with such a switch will thus be easy to mass produce and it will be very cheap, although without the least reduction of strength and electrically safety.
- the present invention has the object of mitigating the disadvantages found in previously known foot-operated switches and to provide such a switch of the mentioned type, which satisfies the above-mentioned desires.
- the device in accordance with the invention includes three parts, a base plate 1, an operating means 2 and a casing 3. These parts are suitably produced in plastics, e.g. by injection moulding.
- the base plate 1 has a generally rectangular shape and at its outer peripheral edge an upwardly projecting wall 4, outside which there is a narrow edge 5, which is intended to join up against the casing 3 when the parts have been assembled.
- the wall 4 has an outwardly directed ridge 6 on the outside, which is intended to snap into a corresponding recess 7 in the inner wall of the casing 3 when the parts are assembled.
- openings 8 In the two opposing short sides there are openings 8, through which a cord is intended to pass. These openings 8 are placed somewhat closer to one long side. In this long side there are a pair of upstanding projections 9, which in coaction with corresponding projections 10 on the walls of the short sides, one on either side of the respective opening 8, are intended to locate the cord switch 11, which is to be enclosed in the inventive device.
- In the base plate 1 there is also a short, upwardly projecting ridge 12 extending transverse the base plate 1 and terminated with a pair of projecting flanges 13. This ridge 12 is intended to be the fulcrum
- the operating means 2 comprises an elongate, relatively thin body which can be hollow or solid. At its lower end the means 2 has a V-shaped recess 14, the apex 15 of which is intended to rest against the ridge 12 of the base plate 1 such as to permit pivoting of the means 2. On either side of the V-shaped recess 14 the bottom edge the operating means 2 extends obliquely upwards in either direction at an angle of ap proximately 15° from the plane of the base plate 1. This means that the operating means 2 can be pivoted a total 30° between the end positions.
- the apex 15 thus constitutes the fulcrum of the operating means 2, and the ends 16 are given an arcuate curve with a radius from this fulcrum so that they lie on the same arcuate line the whole time when the operating means 2 is pivoted.
- bosses 17, 18 project out at right angles to the body on either side.
- the boss 17 is intended to guide the means 2 in the casing 3 while the boss 18 projects out over the cord switch 11 such as to operate it.
- the casing 3 is a rectangular box-shaped member with generally the same form as the base plate 1. It has a pheripheral vertical wall 20, the lower end edge 21 which is intended to rest against the narrow edge 5 on the base plate 1 on assembly, and on the inside of the wall 20 there are recesses co-acting with the outwardly directed ridges 6 on the walls 4 of the base plate 1.
- the upper side has its greatest height at the centre and slopes downwardly towards the short sides, thus being similar to a gable roof.
- In the walls of the short sides of the casing 3 there are openings 23, complemental to the openings 8 in the walls on the short sides of the bottom plate 1, so that a cord can be passed through them.
- FIGs 8-9 illustrate the inventive device in an assembled, operative state. It will be seen how the push-button type cord switch 11 is kept in place on the bottom plate 11 with the aid of the projections 9, 10 and how it is kept down against the bottom plate 1 by the projections 26. Assembling the device is readily accomplished, since it contains so few parts and since there are now screws or other elements requir ing special treatment.
- the cord switch 11 is thus laid on the base plate 1, the operating means 2 is placed over the ridge 12 and the casing 3 is then put into place and pressed downward with a light pressure so that the ridges 6 snap into the recesses 7, the cord switch thus being converted to a foot-operated switch.
- the inventive device should fall apart or be broken apart, something which is not likely per se, the cord switch 11 is still intact and there is no risk of anyone being injured by exposed, live parts. If it is desired to definitely prevent opening the inventive device, glue can be applied between the connecting walls 4, 20.
- the casing is so strong that if it is trodden on it withstands the pressure thus occurring without being damaged. If the operating means 2 is trod on too hard, all that happens is that the lower edge of the means 2 is pressed against the base plate 1 without the boss 18 being pressed in any injurious way against the press button 25.
Landscapes
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Tumbler Switches (AREA)
- Switch Cases, Indication, And Locking (AREA)
Abstract
Description
- The present invention relates to foot-operated switches and more particularly to an operating housing for a switch arranged on the electric cord itself (hereinafter designated "cord switch") whereby a foot-operated switch is achieved.
- Foot-operated switches which are in use today are comparatively complicated structures. The reason for this is that sufficient strength must be obtained so that the switching unit is not broken in operation, even if it is stepped on, and it must also be mounted securely on the cord so that the cord conductors cannot be pulled out and exposed.
- It is most usual to use specially designed foot-operated switches. Such require that the cord on which they are to be mounted is cut, the wires stripped and fastened in the switch itself, parts of the cord projecting from the switch being fastened to the housing itself, after which the housing is screwed together. However, it has become more and more usual to provide cords to different kinds of lamps and the like with both a plug and core switch from the factory. Such cord switches can neither be used nor permitted to be used as foot-operated switches.
- A type of cord switch which is generally available is of the push-type, where a spring-biassed pin projects from a housing, current being switched off and on for alternate depressions of the pin. In the actual switch constituting a part of the cord switch, the conductors must be fastened in the complicated way mentioned above for foot-operated switches, and even though there are such cord switches built into different types of housings for operation as foot-operated switches, there are many work operations which must be carried out, which results in a comparatively expensive final product.
- The cord switch which is at present most usual is of the push-button type with an actuating part inserted in a small housing, this part being rocked about 30° for each operation, such as to close in one position and open in the other position to interrupt the current through the switch. This type of switch is simply made and is molded or heat-sealed directly on to the cord purely mechanically and it is not openable or exchangeable. A cord with such a switch will thus be easy to mass produce and it will be very cheap, although without the least reduction of strength and electrically safety.
- For some time it has therefore been desirable to utilize such a switch in a foot-operated structure, i.e. to achieve a foot-operated switch of the push-button type and simultaneously produce one which is simple, reliable and cheap.
- The present invention has the object of mitigating the disadvantages found in previously known foot-operated switches and to provide such a switch of the mentioned type, which satisfies the above-mentioned desires.
- This object is achieved by a device of the kind disclosed in the claims, from which the characterizing features of the invention will be apparent.
- The invention will now be described in more detail in the following and with reference to the accompanying drawings, where
- Figure 1 is a view from above of a bottom plate including a device in accordance with invention,
- Figure 2 is a section taken along the line II-II in figure 1,
- Figure 3 is a side view of an operating means included in a device in accordance with the invention,
- Figure 4 is a view from above of a casing included in a device in accordance with the invention,
- Figure 5 is a section taken along the line V-V in Figure 4,
- Figure 6 is a section taken along the line VI-VI in Figure 4,
- Figure 7 is a view from above illustrating a cord switch and an operating means mounted on a base plate,
- Figure 8 is a partially sectioned view taken along the line VIII-VIII in Figure 7 with a casing placed over the cord switch and operating means, and
- Figure 9 is a partially sectioned end view taken along the line IX-IX in Figure 8.
- The device in accordance with the invention, with the aid of which a cord switch can be utilized in a foot-operated switch, includes three parts, a
base plate 1, an operating means 2 and acasing 3. These parts are suitably produced in plastics, e.g. by injection moulding. - The
base plate 1 has a generally rectangular shape and at its outer peripheral edge an upwardly projecting wall 4, outside which there is anarrow edge 5, which is intended to join up against thecasing 3 when the parts have been assembled. The wall 4 has an outwardly directedridge 6 on the outside, which is intended to snap into acorresponding recess 7 in the inner wall of thecasing 3 when the parts are assembled. In the two opposing short sides there areopenings 8, through which a cord is intended to pass. Theseopenings 8 are placed somewhat closer to one long side. In this long side there are a pair ofupstanding projections 9, which in coaction withcorresponding projections 10 on the walls of the short sides, one on either side of therespective opening 8, are intended to locate thecord switch 11, which is to be enclosed in the inventive device. In thebase plate 1 there is also a short, upwardly projectingridge 12 extending transverse thebase plate 1 and terminated with a pair of projectingflanges 13. Thisridge 12 is intended to be the fulcrum of the operating means 2. - The operating means 2 comprises an elongate, relatively thin body which can be hollow or solid. At its lower end the
means 2 has a V-shaped recess 14, theapex 15 of which is intended to rest against theridge 12 of thebase plate 1 such as to permit pivoting of themeans 2. On either side of the V-shaped recess 14 the bottom edge the operating means 2 extends obliquely upwards in either direction at an angle of ap proximately 15° from the plane of thebase plate 1. This means that the operating means 2 can be pivoted a total 30° between the end positions. - The
apex 15 thus constitutes the fulcrum of theoperating means 2, and theends 16 are given an arcuate curve with a radius from this fulcrum so that they lie on the same arcuate line the whole time when theoperating means 2 is pivoted. Directly above theapex 15bosses boss 17 is intended to guide themeans 2 in thecasing 3 while theboss 18 projects out over thecord switch 11 such as to operate it. - The
casing 3 is a rectangular box-shaped member with generally the same form as thebase plate 1. It has a pheripheralvertical wall 20, thelower end edge 21 which is intended to rest against thenarrow edge 5 on thebase plate 1 on assembly, and on the inside of thewall 20 there are recesses co-acting with the outwardly directedridges 6 on the walls 4 of thebase plate 1. The upper side has its greatest height at the centre and slopes downwardly towards the short sides, thus being similar to a gable roof. There is alongitudinal slot 22 in the upper side, through which the upper part of theoperating means 2 is intended to project. The highest part of the upper side is directly above theridge 12, thus providing space for theunderlying bosses means 2. In the walls of the short sides of thecasing 3 there areopenings 23, complemental to theopenings 8 in the walls on the short sides of thebottom plate 1, so that a cord can be passed through them. - Figures 8-9 illustrate the inventive device in an assembled, operative state. It will be seen how the push-button
type cord switch 11 is kept in place on thebottom plate 11 with the aid of theprojections bottom plate 1 by theprojections 26. Assembling the device is readily accomplished, since it contains so few parts and since there are now screws or other elements requir ing special treatment. Thecord switch 11 is thus laid on thebase plate 1, theoperating means 2 is placed over theridge 12 and thecasing 3 is then put into place and pressed downward with a light pressure so that theridges 6 snap into therecesses 7, the cord switch thus being converted to a foot-operated switch. - If the inventive device should fall apart or be broken apart, something which is not likely per se, the
cord switch 11 is still intact and there is no risk of anyone being injured by exposed, live parts. If it is desired to definitely prevent opening the inventive device, glue can be applied between the connectingwalls 4, 20. - The casing is so strong that if it is trodden on it withstands the pressure thus occurring without being damaged. If the
operating means 2 is trod on too hard, all that happens is that the lower edge of themeans 2 is pressed against thebase plate 1 without theboss 18 being pressed in any injurious way against thepress button 25. - The present invention has thus achieved the object set forth in the introduction. Certain modifications are possible to one skilled in the art however, but such are intended to lie within the scope of the accompanying claims.
Claims (4)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8803700A SE462635B (en) | 1988-10-17 | 1988-10-17 | DEVICE FOR DIFFICULTY OF FOOT MANUAL OF A PIPE TYPE INTERMEDIATE SWITCH |
SE8803700 | 1988-10-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0365507A2 true EP0365507A2 (en) | 1990-04-25 |
EP0365507A3 EP0365507A3 (en) | 1991-06-12 |
Family
ID=20373658
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890850353 Withdrawn EP0365507A3 (en) | 1988-10-17 | 1989-10-16 | Device in foot-operated switches |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0365507A3 (en) |
SE (1) | SE462635B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4322310A1 (en) * | 1993-07-05 | 1995-01-12 | Murjahn Kg Vlm | Electrical foot-operated switch |
FR2725829A1 (en) * | 1994-10-18 | 1996-04-19 | Murjahn Kg Vlm | Electrical pedal switch incorporating two-position rocker switch |
WO1998031030A1 (en) * | 1997-01-09 | 1998-07-16 | Linak A/S | Contact and control module |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4172217A (en) * | 1978-04-04 | 1979-10-23 | Mercury Electric Products Mfg. Corp. | Foot pedal for a motor control device |
FR2515864A1 (en) * | 1981-10-30 | 1983-05-06 | Lublin Aron | Foot-action two-position electrical rocker switch - has V=shaped restoring springs which can flip from one stable position to another by vertical movement |
-
1988
- 1988-10-17 SE SE8803700A patent/SE462635B/en not_active IP Right Cessation
-
1989
- 1989-10-16 EP EP19890850353 patent/EP0365507A3/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4172217A (en) * | 1978-04-04 | 1979-10-23 | Mercury Electric Products Mfg. Corp. | Foot pedal for a motor control device |
FR2515864A1 (en) * | 1981-10-30 | 1983-05-06 | Lublin Aron | Foot-action two-position electrical rocker switch - has V=shaped restoring springs which can flip from one stable position to another by vertical movement |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4322310A1 (en) * | 1993-07-05 | 1995-01-12 | Murjahn Kg Vlm | Electrical foot-operated switch |
DE4322310C2 (en) * | 1993-07-05 | 1999-10-28 | Murjahn Kg Vlm | Electric foot switch |
FR2725829A1 (en) * | 1994-10-18 | 1996-04-19 | Murjahn Kg Vlm | Electrical pedal switch incorporating two-position rocker switch |
WO1998031030A1 (en) * | 1997-01-09 | 1998-07-16 | Linak A/S | Contact and control module |
US6313421B1 (en) | 1997-01-09 | 2001-11-06 | Linak A/S | Contact and control module |
Also Published As
Publication number | Publication date |
---|---|
SE462635B (en) | 1990-07-30 |
SE8803700D0 (en) | 1988-10-17 |
EP0365507A3 (en) | 1991-06-12 |
SE8803700L (en) | 1990-05-21 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU599769B2 (en) | Two-piece face plate for wall box mounted device | |
US5595289A (en) | Rocker-type electrical switch | |
CA2041098C (en) | Electro-mechanical interlock and module system for lawn mower or other electrical device | |
US4665290A (en) | Trigger operated portable electric tool switch | |
US5573430A (en) | Pressure connector | |
US5269709A (en) | Battery terminal post clamp adapted for connection to an external electric power source or consumer | |
MXPA00000178A (en) | Novel gene and method for producing l-amino acids. | |
JPH0637557Y2 (en) | Switch device | |
US5762517A (en) | Press-connecting joint connector | |
WO1988003322A1 (en) | Modular watertight switch for use in personal care appliances | |
EP0632473A1 (en) | Electric switch with welded contact sensor lockout | |
EP0365507A2 (en) | Device in foot-operated switches | |
US4387282A (en) | Electrical switch assembly | |
JPS62184719A (en) | Switching device | |
WO1980001858A1 (en) | Illuminated sealed rocker switch | |
EP0101958B1 (en) | Push button switch | |
US5436421A (en) | Progressive switch | |
US4202590A (en) | Interlock arrangement for an electrical terminal enclosure | |
US4210791A (en) | Slide switch | |
US4496802A (en) | Single in-line package switch | |
CA2302910C (en) | Projections on face of electrical receptacle for preventing inadvertent tripping of test switch by oversized electrical plug | |
EP0056694B1 (en) | Portable electric power tools | |
CA2306770A1 (en) | Foot switches | |
GB2190800A (en) | Electric plug with switch, fuse and neon lamp | |
JPH08508607A (en) | Actuator or sensor for connecting to the bus line |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH DE ES FR GB IT LI NL SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH DE ES FR GB IT LI NL SE |
|
17P | Request for examination filed |
Effective date: 19910909 |
|
17Q | First examination report despatched |
Effective date: 19931111 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19950628 |