CN102036791B - Electric hair cutting machine - Google Patents

Abstract

The invention discloses an electric hair cutter (1) having a grip (2), a longitudinal axis (17) of the grip (2), a drive (3), a fixed cutting The blade (4), the shearing blade (5) aligned parallel to said stationary shearing blade (4) and adjacent to it in the cutting plane (16) and movable back and forth, and transmitting the rotational movement of the drive shaft (7) A transmission (6) to a movable shearing blade (5), wherein said transmission shaft (7) has a reversing device, preferably an eccentric (8) to convert a rotary motion into a linear forward and backward motion, and has a return A reversing lever (10), which is rotatable around a bearing shaft (9), wherein said reversing lever (10) connects the reversing device to the movable cutting blade (5), and has Slider (11) on the pin (12) of the eccentric (8), said slide (11) is held fixed by a retainer (13) on one end (14) of the reversing lever (10). In order to obtain a mechanical system with optimum handling and smooth running with minimal actuation, it is proposed that the cutting plane (16) forms with the longitudinal axis (17) of the grip (2) 10 to 70°, or preferably 20 to 30° included angle (18), and the slider (11) is designed in the form of a cylinder (19) or a sphere (20) extending in the indicated direction (15).

Description

electric hair cutter

The subject of the invention relates to the beauty industry and electric hair cutters within this industry. the

field of invention

Electric hair cutters are well known. They are used to cut scalp hair and are an alternative to cutting hair with scissors. the

US Patent 3,959,878 discloses a cutting machine for lawn mowing. Its drive technology can be used in hairdressing salons if its dimensions and cutting precision are adapted to the requirements of the hairdressing industry. Such an electric cutter is equipped with a grip (having a longitudinal axis and a drive), a stationary shearing blade, a shearing blade aligned parallel to and adjacent to said stationary shearing blade and movable back and forth in a cutting plane, and A transmission that transmits the rotational motion of the drive shaft to the movable shearing blade. The drive shaft has a reversing device including an eccentric to convert rotary motion into linear forward and backward motion. A reverse lever, rotatable about a carrying axis, connects the reversing unit to the movable shearing blade. connecting a disc in the form of a slider to a pin on the eccentric, wherein said slider is held fixed by a retainer on the end of the reversing rod, and the retainer is designed to be in a direction perpendicular to the drive shaft, Make the slider perform up and down motion in this direction. the

DE 10338401 A1 discloses a hair cutter from the hair salon industry, wherein the cutting plane forms an angle between 10° and 70° with the longitudinal axis of the grip. This included angle allows for easy handling and operation. the

Background of the invention

The known prior art has the disadvantage that there is no specific specifically positioned and smooth-running reversing device for electric hair cutters which are also easy to operate. Thus, the subject of US Patent 3,959,878 requires a higher amount of drive capacity, and the subject of DE10338401A1 has a reversing device that operates less precisely. the

The object of the invention is to further develop the subject-matter of the preamble of claim 1 in such a way that the mentioned disadvantages are eliminated. the

Summary of the invention

This object is achieved by the invention in that the cutting plane forms an angle of 10° to 70° with the longitudinal axis of the grip and the slider is designed in the form of a cylinder extending in a direction perpendicular to the drive shaft Or be designed in the form of a sphere. the

The hair cutter according to the invention has the advantage that it has an advantageous angle since said angle is between 10° and 70°. It is more preferred if said angle is between 20° and 30°, wherein between 20° and 25° is particularly preferred, so that this angle enables a haircut substantially the same as cutting with scissors The hair corresponds, and this is accompanied by ergonomically favorable handling and functionality adapted to the application. The drive capacity (which refers to the size of the drive and optionally the battery life) is minimized because the reversing device transmits the force to be transmitted precisely and profitably, and thus in a low-wear manner. Therefore, in order to ensure a safe and low-wear transmission of force, it is suitable to design the slide as a cylinder. The slider may have a bore in a well known pattern into which a pin is inserted and wherein the slider is rotatably connected to the pin. the

Advantageous embodiments of the proposed innovation are described in claims 2 to 8 . the

This leads to multiple advantages if the slide is designed as a cylinder with at least one flat point ( A2 ). In one aspect, grooves provided on the outer surface of the cylinder, worn along the entire length of the cylinder, are used to define specific positioning references that can be used to calculate relative motion. On the other hand, the non-straight surface area of the cylinder is used for specific positional transfer of force. The flat point ( A3 ) transverse to the central axis of the pin has the advantage that it does not alter any surface area of the cylinder that is important for motion transmission. The same applies to the flat point (A4) parallel to the central axis of the pin shaft. With a flat point transverse to the central axis and a flat point ( A5 ) parallel to the central axis, the slider can be produced particularly precisely and the transmission of forces optimized. When holding the slider at the end of the return lever, the flat points are taken into account and if the slider is held in the holder according to A6 by means of a form-fitting on the curved surface of the slider, the flat points will There is no interference with the rotational movement of the return lever, and the slider can slide along the pin axis. the

In principle, the slider can remain fixed in the holder and can slide along the pin. Alternatively, the technical embodiment can also be designed such that the slide is movable in the holder in the direction of extension of the reversing lever and is fixedly mounted on the pin ( 12 ). the

This embodiment is suitable both for the slider in the form of a sphere and for the slider in the form of a cylinder. In this embodiment, if no flat point parallel to the walls of the holder is provided, the holder has, according to A8, two walls parallel to each other extending in the direction of the reversing lever and adjoining the slider on opposite sides , with a gap between the slider and the wall. The gap is greatest when the return lever is centered, i.e. when it is perfectly aligned. Furthermore, if the backlash is zero when the return lever is rotated to the fullest side to side, this results in the most accurate transfer of the drive to the movable shearing blade. the

Description of drawings

The hair cutter of the present invention is described in more detail below with the aid of figures showing two exemplary embodiments. As follows:

Figure 1 shows a vertical section of a hair cutter with an acute angle between its cutting blades and the longitudinal axis of the grip;

Figure 2 shows a horizontal section of the subject matter of Figure 1;

Fig. 3 shows a perspective view in which the components are separated from each other, the driver, the eccentric which can be placed on the transmission shaft, the cylindrical slider which can be connected to the pin of the eccentric and has a flat point, and has a The reversing lever of the retainer;

Figure 4 is a view showing the subject of Figure 3 as described above, but in the assembled state, in the first rotational state of the eccentric;

Figure 5 is a view of the subject matter of Figure 4 as described above, but with the eccentric rotated an additional 90°;

Figure 6 is a view of the subject matter of Figure 5 as described above, but with the eccentric rotated an additional 90°;

Figure 7 is a view of the subject matter of Figure 6 described above, but with the eccentric rotated an additional 90°;

Figure 8 shows a perspective view in which the components are separated from each other, the driver, the eccentric which can be placed on the transmission shaft, the ball slide with a flat point which can be attached to the pin of the eccentric, and the holder with a retainer for holding the slide Reversing lever of the device;

Figure 9 is a view showing the subject of Figure 8 as described above, but in an assembled state, in the first rotational state of the eccentric;

Figure 10 is a view of the subject matter of Figure 9 described above, but with the eccentric rotated an additional 90°;

Figure 11 is a view of the subject matter of Figure 10 described above, but with the eccentric rotated an additional 90°; and

Figure 12 is a view of the subject matter of Figure 11 described above, but with the eccentric rotated by a further 90°. the

Detailed description of the invention

The electric hair cutter 1 has a grip 2, a longitudinal axis 17 of said grip 2, a drive 3, a fixed clipping blade 4, aligned parallel to the fixed clipping blade 4 and adjoining it on a cutting plane 16 and capable of The shearing blade 5, which moves back and forth, transmits the rotational motion of the transmission shaft 7 to the transmission 6 of the movable shearing blade 5 (Figs. 1 and 2). The transmission shaft 7 has an eccentric 8 as a reversing device ( FIG. 3 ) to convert the rotary motion into a linear back and forth motion ( FIGS. 4 to 7 ). A return lever 10 , rotatable about a bearing shaft 9 , connects the reversing device to the movable shearing blade 5 . A slide 11 is provided on the pin 12 of the eccentric 8 , wherein the slide 11 is held fixed by a holder 13 on one end 14 of the reversing lever 10 . The holder 13 is designed to lie in a direction 15 perpendicular to the drive shaft 7 so that the slider 11 performs an up and down movement in this direction 15 . The cutting plane 16 forms an angle 18 of 23° with the longitudinal axis 17 of the grip 2 . The slider 11 is designed in the form of a cylinder 19 extending vertically in the indicated direction 15 . The grip 2 is designed to accommodate a battery, wherein the hair cutter 1 is designed to charge the battery at a charging station. the

The slider 11 has two flat points 21 on opposite sides of the slider 11 transverse to the central axis 22 of the pin 12 ( FIG. 3 ). Furthermore, a flat point 21 parallel to the central axis 22 is provided. As an alternative to this, a flat point 21 parallel to the central axis 22 can be designed on each of the opposite sides of the slider 11 . The slider 11 is held in the holder 13 by means of a form-fitting 23 on a curved surface 25 . The slider 11 has a bore hole 26 into which the pin shaft 12 is inserted so that the slider 11 can slide along the pin shaft 12 . the

For the exemplary embodiment described in FIGS. 8 to 12 , the slider 11 is designed in the form of a ball 20 . Said ball 20 is movable in the holder 13 in the direction of extension of the reversing lever, since the slider 11 is fixedly mounted on the pin 12 . The holder 13 has two walls 24 which are parallel to each other and which extend in the direction of the return lever 10 and which adjoin the slider 11 on opposite sides with a gap between the slider 11 and the walls 24 . the

As an alternative to both examples, the cylindrical slider 11 of the first example could also be fixedly attached to the pin 12 and held in the holder 13 with parallel walls, and the spherical slider 11 of the second example could slide The way is held on the pin 12 and is limited by the retainer 13 by the surface joint. the

The dimensions and values disclosed herein are not to be understood as being strictly limited to the precise numerical values recited. Instead, unless otherwise specified, each such dimension is intended to mean both the recited value and a functionally equivalent range surrounding that value. For example, a dimension disclosed as "40 mm" is intended to mean "about 40 mm." the

Reference number

1 hair cutter

2 grips

3 drives

4 fixed shearing blades

5 removable shearing blades

6 Transmission

7 drive shaft

8 eccentric parts

9 bearing shaft

10 reciprocating lever

11 sliders

12 pins

13 retainer

14 ends

15 directions

16 cutting planes

17 longitudinal axis

18 angle

19 cylinders

20 spheres

21 flat points

22 The central axis of the pin shaft

Type 23 surface joints

24 walls

25 surfaces

26 holes

Claims (5)

1. A hair cutter (1) having a grip (2), a longitudinal axis (17) of the grip (2), a drive (3), a fixed cutting blade ( 4), a shearing blade (5) aligned parallel to said stationary shearing blade (4) and adjacent to said stationary shearing blade (4) in a cutting plane (16) and movable back and forth, and The rotational movement of the transmission shaft (7) is transmitted to the transmission (6) of the movable shearing blade (5), wherein said transmission shaft (7) has a reversing means in the form of an eccentric (8) in order to transfer the rotational movement Converts to linear fore and aft motion and has a reverse lever (10) which is rotatable about the bearing shaft (9) which connects the reversing device to the movable shearing blade (5) and a slider (11) on the pin shaft (12) of the eccentric (8), wherein the slider (11) passes on one end (14) of the reversing rod (10) The retainer (13) remains fixed, and the retainer (13) is designed to be in the direction (15) perpendicular to the transmission shaft (7), so that the slider (11) in this direction (15) Up and down movement is performed on the top, wherein the cutting plane (16) forms 10° to 70° with the longitudinal axis (17) of the gripper (2), characterized in that the slider (11) is designed to be vertical In the form of a cylinder (19) extending in the direction (15) of the transmission shaft (7), the slider (11) passes through a surface joint on the curved surface (25) of the slider (11) (23) held in the holder (13), the slider (11) can slide along the pin (12), and the slider (11) has at least one flat point (21), the flat point (21) is arranged transversely to the central axis (22) of the pin shaft (12). 2. The hair cutter according to claim 1, characterized in that the flat point (21) is arranged parallel to the flat point (21) of the central axis (22) of the pin shaft (12). 3. The hair cutter according to claim 1 or claim 2, characterized in that a flat point (21 ) transverse to the central axis (22) and a flat point parallel to the central axis (22) are provided. point (21). 4. The hair cutter according to claim 1 or claim 2, characterized in that the slider (11) is movable in the retainer (13) in the extension direction of the reversing rod (10), And said slider (11) is mounted in a fixed position on said pin (12). 5. The hair cutter according to claim 4, characterized in that said holder (13) has two walls (24) parallel to each other and positioned between said reversing lever (10) ) and adjoins the slider (11) on opposite sides with a gap between the slider (11) and the wall (24).

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