EP0305713A1 - Ouvre-boîtes électrique - Google Patents

Ouvre-boîtes électrique Download PDF

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Publication number
EP0305713A1
EP0305713A1 EP88111488A EP88111488A EP0305713A1 EP 0305713 A1 EP0305713 A1 EP 0305713A1 EP 88111488 A EP88111488 A EP 88111488A EP 88111488 A EP88111488 A EP 88111488A EP 0305713 A1 EP0305713 A1 EP 0305713A1
Authority
EP
European Patent Office
Prior art keywords
knife
opener according
actuating member
resilient element
shaft
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.)
Granted
Application number
EP88111488A
Other languages
German (de)
English (en)
Other versions
EP0305713B1 (fr
Inventor
Reinhard Kurz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Braun GmbH
Original Assignee
Braun GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Braun GmbH filed Critical Braun GmbH
Priority to AT88111488T priority Critical patent/ATE63290T1/de
Publication of EP0305713A1 publication Critical patent/EP0305713A1/fr
Application granted granted Critical
Publication of EP0305713B1 publication Critical patent/EP0305713B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
    • B67B7/00—Hand- or power-operated devices for opening closed containers
    • B67B7/38—Power-operated cutting devices

Definitions

  • the invention relates to an electrically driven can opener with a housing accommodating a drive motor and a drive mechanism, a transport wheel arranged on the outside of a housing wall and drivable by the drive motor and the drive mechanism, and a can lid of a tin can rotatably mounted on the housing wall at a distance from the transport wheel separating knife and a manually operated and mounted on the housing actuator through which the knife can be pivoted from a position to a cutting position and the drive motor can be switched on by a switch
  • a known can opener of the type specified (DE-OS 30 48 063)
  • the knife is simultaneously mounted on the actuating member actuating the switch. Both parts are arranged on the outside of the housing wall.
  • the actuating member is first pivoted with the knife and the switch actuated which switches on the drive motor for the transport wheel.
  • the insertion and removal of a can lid is then carried out automatically with the aid of the electric drive, the actuating member being automatically pivoted into the can, ie into the cutting position, with the knife.
  • the knife In the cutting position, the knife is supported on the actuating member, so that the actuating member automatically remains in the switch-on position until the cutting process has ended.
  • the known can opener has the disadvantage that an interruption of a cutting process once started is not possible without further ado, since that during the cutting process from the knife to the actuator Acting torque keeps the switch in the ON position. The consumer must therefore put up with the fact that the can lid is completely cut off if he does not want to forcefully pull the actuator back into the starting position. Furthermore, it is to be regarded as less advantageous that the knife has to be inserted into the can lid by the actuating member before the drive motor is rotated by the switch. This concept inevitably leads to the fact that a relatively long lever has to be used as the actuating member in order to apply the piercing force. The rigid connection between the actuator and the knife, including the long lever, leads to large actuation paths of the actuator and to the undesired application of force to the actuator by the knife, which makes handling of the can opener considerably more difficult.
  • the object of the invention is therefore to provide a can opener of the type mentioned, which is simple and inexpensive to manufacture, which is safe and easy to use, in which the actuator remains unaffected by the forces on the knife and in which the cutting process is interrupted at any time can. Furthermore, it is to be achieved with the invention that the can opener can only be switched on when a tin can is placed on the transport wheel.
  • a resilient element is formed in the transmission area from the actuator to the knife and that the switch is arranged relative to the element that switches it on so that only after the knife is placed on the can lid and only after deformation of the resilient element as a result further actuation of the actuator, the switch can be turned on.
  • the transport wheel is only set in rotation when it is ensured that the knife lies with sufficient pressing force on the can lid. Only then will the knife automatically stick into the can lid when the drive motor is switched on.
  • the can opener can only be switched on when the resilient element is deformed, i.e. when a can is actually attached to the can opener and thus by the deformation of the spring-elastic element of the switch is switched on.
  • Another advantage is that, after the knife rests on the can lid, upon further actuation of the element actuating the switch, the resilient element is prestressed with a low pretensioning force, so that the knife is also pretensioned against the can lid. With the appropriate cutting geometry, this pretensioning force alone is sufficient to automatically insert the knife into the can lid as soon as the transport wheel sets the can in rotation, without restoring forces acting on the switch-actuating element. This requires a particularly short lever as an actuator.
  • the invention furthermore makes it possible that only a single actuating element is required to actuate the knife and to actuate the switch.
  • An equally important advantage according to the invention is that the resilient element is relaxed at any time during the cutting process by pivoting the actuating element back, and it is therefore possible to switch off the drive motor even though the knife remains in its cutting position. Subsequent removal of the can from the knife and the transport wheel is then easily possible at any time if the can lid has not yet been completely separated from the can.
  • the element actuating the switch is the actuating element and that the actuating element is mechanically connected to the knife via the spring-elastic element.
  • the resilient element forms an automatic component, so that the knife can be locally separated from the actuator.
  • the mounting of the actuating member can be arranged at a distance from the knife mounting, as a result of which the lever on the housing of the can opener can be placed cheaply, both from an ergonomic point of view and for safety reasons.
  • the can opener according to the invention therefore enables a particularly handy and practical housing design.
  • the actuating member for example designed as a lever, can be arranged within a handle formed by a closed frame, so that the risk of inadvertent actuation of the can opener is low.
  • the resilient element By designing the resilient element as a separate component, it can be manufactured particularly precisely in terms of strength and the spring characteristic. This allows a more sensitive actuation of the actuator and thus a better handling of the can opener.
  • actuating member is preferably connected directly to the knife, so that no elastic deformation occurs when the actuating member is actuated in this area; the elastic deformation then arises rather on the actuating element designed as an elastic lever, in that after the knife rests on the can lid, when the actuating element is pulled further, it no longer rotates, but only deforms along the lever length until the switch is actuated.
  • the resilient element can be produced particularly easily and inexpensively if it consists of spring wire and if ends bent at approximately right angles engage in eccentric bores in the actuating member and in the knife. Due to the eccentric holes, the movement initiated on the lever is transferred to the knife as a rotary movement.
  • the spring-elastic element present in the transmission path between the lever and the knife when correctly designed, enables the drive motor to be switched on before the knife is inserted into the can lid.
  • the actuating member consists of a lever rotatably mounted on the housing, the resilient element being coupled to a connecting part mounted in the housing, which is connected to a shaft carrying the knife.
  • a sliding member can also be used, so that an eccentric bore is only arranged on the connecting part.
  • a further development of the invention provides that the connecting part is detachably connected to the shaft. Disassembly allows easy cleaning and replacement of the knife.
  • one or both ends of the resilient element are Z-shaped.
  • the coupling rod formed by the spring wire bends after the knife comes to rest on the edge of the can lid when the lever is pivoted further into the switch-on position.
  • At least one end of the resilient element can additionally be bent several times.
  • the central region of the spring-elastic element can be shaped into a single or multiple spiral.
  • the helix can be arranged eccentrically to the longitudinal axis of one or both lateral areas of the resilient element.
  • the resilient element can preferably be made of metal and / or plastic. Rubber-elastic plastics can also be used here. When combining the materials metal / plastic, it is conceivable that the two edge ends are connected to one another via a rubber-elastic element.
  • the distance between the actuating member and the switch must be such that when the actuating member is actuated, this only after Placing the knife on the can lid switches on the switch and thus the drive motor by deforming the spring-elastic element.
  • the invention further provides that the knife, the connecting part, the spring-elastic element and the actuating member can be moved into the starting position by a return spring.
  • these parts are basically in the starting position in the rest position. The starting position enables easy opening and operation of the can opener with one hand.
  • the end of the shaft provided with a flattened portion engages in a non-rotatable manner in a flattened portion correspondingly formed in a bore in the connecting part.
  • the connecting part is designed as a flat circular disk with a radial lever arm having an eccentric bore.
  • the circular disk can be produced particularly easily as a stamped part if it is made of metal or as a molded part if it is made of plastic.
  • the connecting part can be permanently connected to the shaft.
  • the connecting part In the case of a knife which can be removed from the can opener, however, the connecting part must be releasably connected to the shaft.
  • an unlockable bolt is provided which engages in a groove formed in the shaft. The unlockable bolt is held in the starting position by a spring which acts counter to the release direction of the bolt and thus always ensures that the shaft is held securely in the can opener.
  • an actuating button secured in the housing for actuating the bolt is held in its initial position.
  • the rotatability of the knife beyond an extreme cutting position is limited by a stop and that when the actuating member is actuated into the end position of the knife defined by the stop without a can being cut open, the actuating member can only be moved further by tensioning the spring-elastic element arranged between the actuating member and the shaft into a position in which the switch is then closed.
  • the actuating member can only be moved further by tensioning the spring-elastic element arranged between the actuating member and the shaft into a position in which the switch is then closed.
  • the knife first rotates to its end position at the stop, covering the transport wheel from the side and from the front. A risk of injury in this position is now completely excluded by the knife, even if the other hand turns the actuator further - the knife remains in its end position - the drive motor is switched on and the transport wheel is set in rotation. Childproofing is achieved by this inventive design.
  • the invention provides that Actuator from the knife on the resilient element can not be brought into a position in which it actuates the switch. This arrangement also prevents the risk of injury (additional child protection), since the drive motor is not switched on and the transport wheel does not turn.
  • switching on the drive motor by turning the knife can also be avoided in that the switch is closed in a pivoting range of the actuating member in which one end of the resilient element is in a dead center position.
  • the can opener shown consists of a substantially cuboid housing 1, in which there is a gear, not shown, with an electric drive motor (also not shown) for a transport wheel 2.
  • the transport wheel 2 is located on the outside of a housing wall 3 and is screwed to a drive shaft 4, which the housing penetrates wall 3 and which is mounted in this and an opposite housing wall 5.
  • a spacer 6 is provided on the drive shaft 4, which transmits the pressure force occurring during the cutting process to the housing wall 3.
  • the outer diameter of the spacer 6 is larger than the outer diameter of the toothed transport wheel 2 and in this way forms an additional side guide for the can rim 41, which counteracts tipping of the can or, if the can 46 is held tight, tipping of the can opener.
  • a shaft 7 is mounted in the housing 1 parallel to the drive shaft 4 and carries a knife 8 at its end protruding from the housing wall 3.
  • the knife 8 is fixed by a screw 9 on the end face of the shaft 7 in a rotationally fixed and axially immovable manner.
  • an intermediate disk 10 is provided, on which a compression spring 11 is supported, which rests on the housing wall 3.
  • the end of the shaft 7 engages in a bore 37 of a sleeve 12 which is designed as a connecting part and which is mounted in a bearing eye 13 on the housing wall 5.
  • a sleeve 12 which is designed as a connecting part and which is mounted in a bearing eye 13 on the housing wall 5.
  • the end of the shaft 7 engaging in the sleeve 12 is provided with a flat 14, with which a flat 15 formed in the sleeve 12 in the bore 37 is in engagement.
  • the sleeve 12 has an arm 16 with a bore 17 into which the bent end 18 of a spring-elastic element made of spring wire engages in the form of a coupling rod 19.
  • the other bent end 20 of the coupling rod 19 engages in a bore 21 in one of FIG. 1 behind the sectional plane lying in the housing 1 rotatably mounted lever 22 which serves to actuate the can opener.
  • a cam 23 for actuating a switch 38 is also provided on the lever 22 (FIG. 2).
  • the shaft 7 is held by a bolt 24 designed as a plate, which is mounted on the inside of the housing wall 3 on pins 25 from top to bottom and vice versa.
  • a bore 26 is provided in the plate 24, through which the shaft 7 is inserted.
  • the edge of the bore 26 engages in a groove 27 formed in the shaft 7 and thereby forms an axial bearing which holds the shaft 7 on the housing 1 in the axial direction.
  • the plate 24 engages with a forked end 50 in a groove 28 which is formed on a stop 29 which is screwed into the housing wall 3 and is designed as a guide pin.
  • the distance between the plate 24 and the housing wall 3 can be varied by the screwing depth of the guide pin 29 into the housing 1. In this way, the axial position of the shaft 7 and thus the distance a of the knife 8 relative to the transport wheel 2 can be set precisely with the aid of the guide pin 29.
  • the plate 24 is pressed in its locking position shown (Fig. 1) by a spring clip 30 in the drawing upwards.
  • a pushbutton 31 which penetrates the housing 1 is provided on the top of the housing 1 and rests on an angled portion 32 formed on the plate 24 at the edge thereof. If the push button 31 is actuated in the direction of the shaft 7, the plate 24 can be pushed downward against the force of the spring clip 30 until the edge of the bore 26 out of the groove 28 emerges and the bore 26 is aligned with the shaft 7. Due to the action of the compression spring 11, the shaft 7 is then automatically shifted to the right, so that the plate 24 can no longer snap into the groove 26.
  • the knife 8 and the shaft 7 can now be removed from the housing 1 together even after the pushbutton has been released, for example for cleaning purposes.
  • the end of the shaft 7 is provided with a chamfer 40, the smallest diameter of which engages in the bore 26 even when the plate 24 is not depressed, and the plate 24 when the shaft 7 is displaced further pulls down.
  • the knife 8 If the knife 8 is in the cutting position (shown in dashed lines in FIG. 4), its cutting edge 43 is in front of the latter in the direction of rotation 42 of the transport wheel 2. In order to achieve this position, the knife 8 must be pivoted by actuating the lever 22 (FIGS. 1 and 2) against a return spring 33 engaging the sleeve 12.
  • the coupling rod 19 transmits the rotary movement of the lever 22 to the sleeve 12, which takes the shaft 7 with it in its movement via the flat 15.
  • the torque that can be generated here is not sufficient to insert the knife 8 with its piercing tip 44 into the can lid 45 at the start of a cutting process.
  • the coupling rod 19 is therefore elastically deformable (see dashed line in Fig.
  • the can 46 (FIG. 4) is driven via its can edge 41 by the transport wheel 2 and thereby rotated, and at the same time the cover 45 becomes the knife 8 cut, as long as the lid 45 is not completely separated from the rest of the can 46.
  • the lever 22 If the lever 22 is moved back to the starting position after the cutting process has ended, it first actuates the switch 38, which switches off the drive motor of the can opener. At the same time, the spring-elastic element 19 is relaxed and pulls the sleeve 19 into its starting position, which in turn pivots the shaft 7 together with the knife 8 back into its starting position. The automatic return process is only guaranteed by the return spring 33.
  • the switch-on pressure on the lever 22 must first be released.
  • the lever 22 rotates back into its initial position to the extent that it is moved back in the direction of the initial position by the movement released when the spring-elastic element 19 is released.
  • the switch 38 is actuated, which switches off the drive motor.
  • the knife 8 is held in the cutting position.
  • the can opener is pivoted slightly upward while holding the can 46.
  • the knife 8 is released from the cutting gap and is moved back into its starting position by the return spring 33.
  • FIG. 3 shows a variant of the coupling rod 19 formed from spring wire, in which, in order to increase the elasticity, the central region of the spring-elastic element 19 is bent into a twisted spiral 34.
  • Essentially straight sections 35 lead from the helix 34 to the two bent ends 18, 20 of the coupling rod 19.
  • the sections 35 lie on a common longitudinal axis which affects the turns of the eccentrically arranged helix 34.
  • the bent ends 18, 20 lie in a common plane, and the spirals 34 are essentially above this plane in the drawing.
  • the extent of the elasticity and the direction of the buckling can be predetermined in the desired manner by the number and position of the turns of the helix 34.
  • the design of the coupling rod 19 according to FIG. 3 therefore offers the designer a wide scope for designing the power transmission from the lever 22 to the sleeve 12 and from there to the shaft 7 of the knife bearing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Opening Bottles Or Cans (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Discharge Heating (AREA)
  • Glass Compositions (AREA)
  • Lock And Its Accessories (AREA)
EP88111488A 1987-09-02 1988-07-16 Ouvre-boîtes électrique Expired - Lifetime EP0305713B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88111488T ATE63290T1 (de) 1987-09-02 1988-07-16 Elektrisch angetriebener dosenoeffner.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19873729259 DE3729259A1 (de) 1987-09-02 1987-09-02 Elektrisch angetriebener dosenoeffner
DE3729259 1987-09-02

Publications (2)

Publication Number Publication Date
EP0305713A1 true EP0305713A1 (fr) 1989-03-08
EP0305713B1 EP0305713B1 (fr) 1991-05-08

Family

ID=6335021

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88111488A Expired - Lifetime EP0305713B1 (fr) 1987-09-02 1988-07-16 Ouvre-boîtes électrique

Country Status (7)

Country Link
US (1) US4922617A (fr)
EP (1) EP0305713B1 (fr)
JP (1) JPH0641319B2 (fr)
AT (1) ATE63290T1 (fr)
CA (1) CA1321471C (fr)
DE (2) DE3729259A1 (fr)
ES (1) ES2021799B3 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5313708A (en) * 1992-12-04 1994-05-24 The Rival Company Can opener
CA2135114C (fr) * 1993-11-22 2004-08-24 Richard B. Kosten Ouvre-boite avec dispositif de retenue mobile pour couvercle
US5992026A (en) * 1998-01-09 1999-11-30 The Rival Company Kitchen appliance with pivotal mounting
USD411789S (en) * 1998-01-09 1999-07-06 The Rival Company Can opener
US6189221B1 (en) 1998-12-31 2001-02-20 The Rival Company Can opener appliance having a side-cutting mechanism
US6510613B1 (en) 2000-07-20 2003-01-28 The Holmes Group, Inc. Ergonomic can opener
US6505405B2 (en) * 2001-04-05 2003-01-14 Main Power Electrical Factory Limited Electric can opener
TWI353360B (en) 2005-04-07 2011-12-01 Nippon Catalytic Chem Ind Production process of polyacrylic acid (salt) wate
EP1837348B9 (fr) 2006-03-24 2020-01-08 Nippon Shokubai Co.,Ltd. Résine absorbant l'eau et son procédé de fabrication
US9221665B1 (en) * 2013-12-05 2015-12-29 Gregory Mark Adamczak Manual left or right hand can opener with tilt and rotating spherical joint
US20180265341A1 (en) * 2017-03-17 2018-09-20 Gregory Mark Adamczak Electric can opener with rotating spherical joint

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3277570A (en) * 1964-08-03 1966-10-11 Rival Mfg Company Electric can opener with power pierce means
US3550271A (en) * 1968-05-29 1970-12-29 Oster Mfg Co John Automatic can opener
US3881247A (en) * 1972-09-08 1975-05-06 Aichi Electric Mfg Electrically powered can opener

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2979815A (en) * 1959-05-08 1961-04-18 Burgess Vibrocrafters Electric can opener
US3706135A (en) * 1969-11-08 1972-12-19 Matsushita Electric Ind Co Ltd An electrically powered can opener
DE3048063A1 (de) * 1980-12-19 1982-07-08 Hermann Mellert GmbH & Co KG Fabrik für Feinmechanik und Elektrotechnik, 7518 Bretten Elektrischer dosenoeffner
JPS6055396B2 (ja) * 1982-09-06 1985-12-04 株式会社愛知電機工作所 電気缶切機

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3277570A (en) * 1964-08-03 1966-10-11 Rival Mfg Company Electric can opener with power pierce means
US3550271A (en) * 1968-05-29 1970-12-29 Oster Mfg Co John Automatic can opener
US3881247A (en) * 1972-09-08 1975-05-06 Aichi Electric Mfg Electrically powered can opener

Also Published As

Publication number Publication date
JPS6470397A (en) 1989-03-15
DE3862721D1 (de) 1991-06-13
EP0305713B1 (fr) 1991-05-08
US4922617A (en) 1990-05-08
ATE63290T1 (de) 1991-05-15
JPH0641319B2 (ja) 1994-06-01
ES2021799B3 (es) 1991-11-16
DE3729259A1 (de) 1989-03-23
CA1321471C (fr) 1993-08-24

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