EP2024147A1 - Swing bridge for converting a rotary motion into an oscillating motion and use of same in an electrical device - Google Patents
Swing bridge for converting a rotary motion into an oscillating motion and use of same in an electrical deviceInfo
- Publication number
- EP2024147A1 EP2024147A1 EP07724092A EP07724092A EP2024147A1 EP 2024147 A1 EP2024147 A1 EP 2024147A1 EP 07724092 A EP07724092 A EP 07724092A EP 07724092 A EP07724092 A EP 07724092A EP 2024147 A1 EP2024147 A1 EP 2024147A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coupling
- swing
- oscillating
- oscillating body
- swing bridge
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
- B26B19/28—Drive layout for hair clippers or dry shavers, e.g. providing for electromotive drive
Definitions
- the invention relates to a swing bridge for converting a rotational movement into an oscillatory movement in an electrical device according to the preamble of patent claim 1.
- swing bridges are known for example from DE 32 24 223 C2 and are used inter alia in electric dry shavers.
- such swing bridges in small electrical appliances are usually made of plastic, moreover, they are usually made in one piece.
- various plastics are suitable as materials for swing bridges, wherein the individual plastics have significantly different properties with respect to the life, the water absorption and thus the manufacturing tolerances, the elasticity and the sliding properties.
- the selection of materials always represented a compromise with respect to the overall desired material properties.
- the loads to which different areas of the swing bridge are exposed differ significantly from one another.
- the elasticity and resulting from the possible load changes lifetime of utmost importance, while it arrives in the coupling, ie the contact point between the rotating drive and the swing bridge in particular wear resistance and low manufacturing tolerances.
- An increase in the manufacturing tolerance in the coupling leads namely directly to increase the noise level, since any game in this area must be taken again at each change of direction of the swing bridge and thus ultimately leads to a constant impact of the drive to the swing bridge.
- the invention is therefore an object of the invention to provide a generic swing bridge, which is optimized both in terms of achievable life and in terms of noise minimization and greatly improved over the previously known swing bridges.
- the solution according to the invention makes it possible in a simple way to form the coupling so that it can be produced with minimal manufacturing tolerance and especially has good sliding properties, while the remaining areas of the swing bridge are optimized in terms of elasticity and service life.
- the two-part design also favors the demolding of the mold, since the complexity of the individual parts is lower.
- a preferred embodiment of the invention provides that the coupling consists of a different material than the vibrating body.
- the coupling and / or the oscillating body has fastening means for connecting these two components.
- Advantageous embodiments of the invention further provide that the coupling of polyoxymethylene (POM) consists, or that the oscillating body and the other parts of the swing bridge to the coupling of polyamide (PA) exist.
- POM is characterized, for example, by particularly good sliding properties, which are particularly advantageous in the area of coupling, in which relative movements always occur between the crank-shaped or eccentric-like section and the corresponding swing-bridge-side guides.
- the material POM is characterized by a very low water absorption, whereby particularly low manufacturing tolerances are possible, which in turn, as already stated above, lead to a reduction in noise. In the coupling area no material deformation takes place, so that the property of the elasticity or the life with respect to load changes is not of primary importance.
- the oscillating body, the at least one oscillating arm and the at least one articulating element are made in one piece and can therefore be produced in a particularly simple manner and without further assembly steps.
- Such a vibration bridge according to the invention is particularly suitable for use in an electric shaver, wherein the working means is at least one shearing element of a shaving system. Especially in this field of small electronic devices high demands are placed on life and low noise at low production costs.
- Fig. 2 is a longitudinal section through a swing bridge according to the invention.
- Fig. 3 the swing bridge according to the invention in a perspective view.
- the dry shaver shown in Fig. 1 has a housing 1, in which an electric motor 2 is fixed to a drive shaft 3.
- On the drive shaft 3 is the eccentric 4, which is rotatably connected and fixed in the axial direction with the drive shaft 3.
- This eccentric section 4 has a relative to the drive shaft 3 eccentrically offset pin 5, which engages in the coupling 6 of the swing bridge 7.
- the coupling 6 for this purpose has a horizontally extending along the plane of the drawing slot 8, whose width corresponds to the diameter of the pin 5.
- the oscillating body 9 is provided in its upper region with a bearing pin 10, on which the lower blade 11 of a shearing system is held.
- the lower blade 11 has, in a manner known per se, a multiplicity of blades 12 arranged in parallel one behind the other, which together with the shearing foil 13 spanning them form the shearing system.
- a swing bridge 7 of the invention is shown in longitudinal section, this is composed of a vibrating body 9 and the associated with this coupling 6, and from articulation elements 15 which are connected via swing arms 16 with the oscillating body 9, together.
- the left and right side of the oscillating body 9 arranged articulation elements 15 serve to attach the swing bridge 7 on the housing 1 of the device.
- the coupling elements 15 are provided with fastening pins 17.
- the oscillating arms 16 are designed as vertically extending, flexurally elastic strips which are connected on the one hand via the bending joints 18 with the articulation elements 15 and on the other hand via the bending joints 19 with the respective lower portion of the oscillating body 9.
- This suspension allows Relatiwerschieben along the oscillation direction A, which is indicated by a double arrow, between the oscillating body 9 and the coupling elements 15.
- the oscillating body 9 has a longitudinal section eetwa C-shaped configuration and is together with the hinge elements 15, the mounting pin 17, the swinging arms 16 and the bending joints 18, 19 executed as a one-piece component.
- the coupling 6 is designed as a box-shaped component and connected via the four retaining bolts 20 with the oscillating body 9.
- the integrally formed with the oscillating body 9 retaining bolts 20 are caulked for the purpose of fixing the coupling 6 at its end projecting through this.
- a hot caulking is suitable for this purpose. This creates a rivet-like connection.
- the perspective view of the oscillating bridge in Fig. 3 again clearly shows the slot 8, which is provided in the coupling 6 and which is perpendicular to the direction of oscillation A.
- the distance between the side walls 21 of the slot 8 is exactly adapted to the diameter of the pin 5 of the eccentric 4, so that relative to the oscillation direction A, a play-free mounting of the pin 5 is realized in the slot 8. This counteracts the occurrence of noise.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006022909A DE102006022909A1 (en) | 2006-05-15 | 2006-05-15 | Rocker bridge for converting a rotary motion into an oscillatory motion and use of such in an electrical device |
PCT/EP2007/003151 WO2007131579A1 (en) | 2006-05-15 | 2007-04-07 | Swing bridge for converting a rotary motion into an oscillating motion and use of same in an electrical device |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2024147A1 true EP2024147A1 (en) | 2009-02-18 |
EP2024147B1 EP2024147B1 (en) | 2011-03-23 |
Family
ID=38171310
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07724092A Active EP2024147B1 (en) | 2006-05-15 | 2007-04-07 | Swing bridge for converting a rotary motion into an oscillating motion and use of same in an electrical device |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2024147B1 (en) |
JP (1) | JP5148599B2 (en) |
CN (2) | CN104029226A (en) |
AT (1) | ATE502740T1 (en) |
DE (2) | DE102006022909A1 (en) |
WO (1) | WO2007131579A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11331821B2 (en) | 2016-09-28 | 2022-05-17 | Braun Gmbh | Electrically driven device |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104801478B (en) * | 2014-01-24 | 2017-07-11 | 赛恩倍吉科技顾问(深圳)有限公司 | Electronic installation and its vibrating mechanism used |
JP6275501B2 (en) * | 2014-02-07 | 2018-02-07 | マクセルホールディングス株式会社 | Electric razor |
CN104802194A (en) * | 2015-05-06 | 2015-07-29 | 浙江美森电器有限公司 | Shaver capable of repairing skin injury caused by shaving |
EP3300862B1 (en) | 2016-09-28 | 2019-10-23 | Braun GmbH | Electrically driven device |
EP3424653A1 (en) * | 2017-07-07 | 2019-01-09 | Koninklijke Philips N.V. | Motion transmission unit, drive train and hair cutting appliance |
EP3542975B1 (en) | 2018-03-23 | 2020-12-30 | Braun GmbH | Electrically driven device |
CN108848932A (en) * | 2018-07-11 | 2018-11-23 | 王利平 | Spindle nose shaking type picking machine |
CN115803160A (en) | 2020-07-01 | 2023-03-14 | 博朗有限公司 | Electric drive device |
EP4175798A1 (en) * | 2020-07-01 | 2023-05-10 | Braun GmbH | Swing bridge and electrically driven device herewith |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT337572B (en) * | 1975-07-28 | 1977-07-11 | Philips Nv | ELECTRIC MOTOR DRIVEN DEVICE |
US4428117A (en) | 1981-06-30 | 1984-01-31 | Matsushita Electric Works, Ltd. | Reciprocating type electric shaver |
DE4341392C1 (en) * | 1993-12-04 | 1994-12-22 | Braun Ag | Eccentric rocking-link drive |
JP2838027B2 (en) * | 1993-12-28 | 1998-12-16 | 株式会社テック | Electric shaver |
US5678312A (en) * | 1994-10-31 | 1997-10-21 | Sanyo Electric Co., Ltd. | Electric shaver with reduced vibration |
JP3699736B2 (en) * | 1995-01-11 | 2005-09-28 | 株式会社泉精器製作所 | Electric razor |
JPH10156067A (en) * | 1996-11-26 | 1998-06-16 | Sanyo Electric Co Ltd | Reciprocation type electric razor |
JP3916509B2 (en) * | 2002-05-29 | 2007-05-16 | 株式会社泉精器製作所 | Electric razor |
-
2006
- 2006-05-15 DE DE102006022909A patent/DE102006022909A1/en not_active Withdrawn
-
2007
- 2007-04-07 CN CN201310652656.7A patent/CN104029226A/en active Pending
- 2007-04-07 EP EP07724092A patent/EP2024147B1/en active Active
- 2007-04-07 AT AT07724092T patent/ATE502740T1/en active
- 2007-04-07 DE DE502007006781T patent/DE502007006781D1/en active Active
- 2007-04-07 WO PCT/EP2007/003151 patent/WO2007131579A1/en active Application Filing
- 2007-04-07 CN CNA2007800180017A patent/CN101448611A/en active Pending
- 2007-04-07 JP JP2009510302A patent/JP5148599B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2007131579A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11331821B2 (en) | 2016-09-28 | 2022-05-17 | Braun Gmbh | Electrically driven device |
Also Published As
Publication number | Publication date |
---|---|
CN104029226A (en) | 2014-09-10 |
DE102006022909A1 (en) | 2007-11-22 |
ATE502740T1 (en) | 2011-04-15 |
JP2009538104A (en) | 2009-10-29 |
JP5148599B2 (en) | 2013-02-20 |
EP2024147B1 (en) | 2011-03-23 |
DE502007006781D1 (en) | 2011-05-05 |
WO2007131579A1 (en) | 2007-11-22 |
CN101448611A (en) | 2009-06-03 |
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