DE102008024785A1 - Electric hair cutting machine, has retainer whose boundary has continuous curvature that is computed such that boundary lies at pin at angle of lever relative to pin in form-fit manner, and lever connecting deflection device with retainer - Google Patents

Abstract

The machine (1) has a gearbox (6) transmitting rotational movement of a drive shaft (7) to a movable shaving head cutter (5). A deflection lever (10) connects a deflection device with a retainer (13) for a pin (12) of an eccentric (8). The pin is formed in a direction (15) perpendicular to the drive shaft such that the pin implements up and down movement in the direction. A boundary of the retainer has a continuous curvature that is computed such that the boundary lies at the pin at an angle (18) of the lever relative to the pin in a form-fit manner.

Description

Of the Registration subject concerns the barber area and there an electric Hair clipper.

electrical Hair clippers are well known. They serve for cutting the hair and are an alternative to a Haircut using a pair of scissors.

From the DE 10338401 A1 an electric hair clipper according to the preamble of claim 1 is known. This electric hair clipper is formed with a handle portion having a longitudinal axis, further comprising a drive, a fixed shaving head, a parallel to the fixed shaving head aligned and adjoining this, in a cutting plane reciprocally movable shaving head knife, and a transmission, which has a Rotary movement of a drive shaft transmits to the movable shaving head knife. In this case, the drive shaft has a deflection device which has an exciter, in order to convert the rotary movement into a linear reciprocating movement. A pivotable about a bearing axis lever connects the deflection with the movable shaving head knife. It is provided a receptacle for the pin of the eccentric, wherein the pin is received on opposite sides of each of a boundary of the receptacle at one end of the reversing lever, the receptacle in a direction perpendicular to the drive shaft is configured so that the pin in this direction up and down movement performs, and the cutting plane with the longitudinal axis of the handle portion an angle of 10 to 70 degrees, z. From 20 to 30 degrees.

Of the known prior art has the disadvantage that the deflection relatively inaccurate so that it leads to a troubled operation.

It the object underlying the object of the preamble of Claim 1 develop such that the mentioned Disadvantage is eliminated.

Solved the task is characterized by the fact that the boundaries are continuous Curvature calculated such that the Limitations at each angle of the bell crank relative to the pin in abut a positive connection on the pin.

The Design of the boundaries is suitable to a safe and To grant wear-resistant power transmission. This may be due to a game between the pen and the two boundaries be waived to the greatest extent possible Achieve accuracy of power transmission. Or it will a game between the pen and only one of the boundaries provided, depending on the direction in which a movement of the reversing lever, to continue the wear in the area of the limits minimize. Thus, during a movement the shot to the right between the pin and the left boundary a small light gap be given constructive. The same applies to the right limit when moving to the left.

When Curves are particularly circular arcs or Elliptical arcs.

in the Following is the proposed hair clipper to figures, represent an embodiment, closer described. It shows:

1 in a vertical section, a hair clipper with an acute angle between its two Scherkopfmessern one hand and a longitudinal axis of a handle part on the other;

2 in a horizontal section the subject of 1 ;

3 in a perspective view with separate components, a drive, a set on a drive shaft eccentric and a lever with a receptacle for receiving the pin, wherein the receptacle has specially formed boundaries;

4 in a view from above the subject of 3 but in assembled form in a first rotational state of the eccentric;

5 in a view from above the subject of 4 , but with eccentric rotated by 90 degrees;

6 in a view from above the subject of 5 , but with 90 degrees further rotated eccentric, as well

7 in a view from above the subject of 6 , but with 90 degrees further rotated eccentric.

For an electric hair clipper 1 with a handle part 2 , a longitudinal axis 17 of the grip part 2 , a drive 3 , a fixed shaving head knife 4 , one parallel to the fixed shaving head knife 4 aligned and adjoining this, in a sectional plane 16 reciprocating shaving knife 5 , transmits a gearbox 6 a rotational movement of a drive shaft 7 on the movable shaving head knife 5 ( 1 and 2 ). The drive shaft 7 has as a deflection an eccentric 8th ( 3 ) on the Drehbewe to transform it into a linear back and forth movement ( 4 to 7 ). One around a bearing axis 9 swiveling lever 10 connects the diverter with the movable shaving head knife 5 , The handle part 2 is designed to hold a battery, the hair clipper 1 is intended to charge the battery at a charging station.

It is a recording 13 for the pen 12 of the eccentric 8th provided, the pin 12 on opposite sides of each one boundary 11 the recording 13 at one end 14 of the reversing lever 10 is recorded, and the recording 13 in one direction 15 perpendicular to the drive shaft 7 designed so that the pin 12 in this direction 15 one up and down movement performs. Between the cutting plane 16 and the longitudinal axis 17 of the grip part 2 is an angle of 23 degrees.

The limits 11 are designed as semicircles to minimize friction with the stylus 12 to surrender. They therefore have a continuous curvature 19 auf, which was so locally predetermined and calculated with respect to the radius of the semicircle that the boundaries 11 at every angle of the bellcrank relative to the pin 12 in a form fit 23 at the pin 12 issue. At each angular position of the reversing lever 10 relative to the central axis 22 of the pen 12 Both limits are 11 play free on the pen 12 at.

1

Clippers

2

handle part

3

drive

4

Shaving head diameter, fixed

5

Shaving head diameter, movable

6

transmission

7

drive shaft

8th

eccentric

9

bearing axle

10

Umlenkhebel

11

limit

12

pen

13

admission

14

The End

15

direction

16

cutting plane

17

longitudinal axis

18

angle

19

curvature

22

central axis of the pen

23

form-fit

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 10338401 A1 [0003]

Claims (3)

Electric Hair Clipper ( 1 ) with a handle part ( 2 ), a longitudinal axis ( 17 ) of the grip part ( 2 ), a drive ( 3 ), a fixed shaving head knife ( 4 ), parallel to the fixed shaving head knife ( 4 ), and adjacent thereto, in a sectional plane ( 16 ) reciprocating shaving knife ( 5 ), as well as a transmission ( 6 ), which rotational movement of a drive shaft ( 7 ) on the movable shaving head knife ( 5 ) transmits, wherein the drive shaft ( 7 ) a deflection device in the form of an eccentric ( 8th ) in order to convert the rotational movement into a linear reciprocating movement, with one about a bearing axis ( 9 ) swivel lever ( 10 ), which the deflection device with the movable shaving head knife ( 5 ) and a recording ( 13 ) for the pen ( 12 ) of the eccentric ( 8th ), whereby the pen ( 12 ) on opposite sides of each boundary ( 11 ) of the recording ( 13 ) at one end ( 14 ) of the reversing lever ( 10 ), the recording ( 13 ) in one direction ( 15 ) perpendicular to the drive shaft ( 7 ) is designed so that the pin ( 12 ) in this direction ( 15 ) performs an up and down movement, and the cutting plane ( 16 ) with the longitudinal axis ( 17 ) of the grip part ( 2 ) an angle ( 18 ) of 10 to 70 degrees, preferably 20 to 30 degrees, characterized in that the boundaries ( 10 ) a continuous curvature ( 19 ) calculated in such a way that the boundaries ( 11 ) at each angle of the bell crank ( 10 ) relative to the pen ( 12 ) in a positive fit ( 23 ) on the pen ( 12 ) issue. Hair clipper according to claim 1, characterized in that at each angular position of the reversing lever ( 10 ) relative to the central axis ( 22 ) of the pen ( 12 ) both limits ( 11 ) play free on the pen ( 12 ) issue. Hair clipper according to claim 1 or claim 2, characterized in that the curvature ( 19 ) is a circular arc or an elliptical arc.