Hair-cutting appliance and cutting unit for a hair-cutting appliance
Patent Information
- Application Number
- EP2023798988
- Authority / Receiving Office
- EP · EP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2022-11-07
- Filing Date
- 2023-11-07
- Publication Date
- 2025-09-17
AI Technical Summary
Existing hair cutting devices lack flexibility and economic efficiency due to limited adjustment options, with most devices being either continuously or step-adjustable, but not both, leading to low machine efficiency in salons.
A hair cutting device with a blade arrangement and a selection device that allows for both continuous and stepped adjustments of cutting length, enabling two modes of operation and improving flexibility and economic efficiency.
The device provides a cost-effective, flexible solution by allowing adjustable cutting lengths in both continuous and stepped modes, enhancing machine efficiency and usability in salons.
Smart Images
Figure 1.1
Abstract
Description
[0001] Hair clipper and cutting set for a hair clipper
[0002] Field of the invention
[0003] The invention relates to a hair cutting device and a cutting set for a hair cutting device.
[0004] State of the art
[0005] Hair cutting devices are known from the prior art and include, among other things, a blade arrangement provided at a front end of the hair cutting device and suitable for cutting hair.
[0006] The blade arrangement generally comprises two cutting elements, the first of which is fixedly connected to the rest of the hair-cutting device, and the second of which is arranged to be movable relative to the first. Cutting elements with comb-like cutting edges are frequently used, with the first cutting element being designed as a so-called shearing comb and coming into contact with the skin of the person or animal being treated, or the user. The second cutting element is then designed as a shearing blade. Each cutting element has a row of spaced-apart teeth, with the teeth generally being arranged at equal intervals from one another. Such a blade arrangement can be designed to allow different cutting lengths to be set.The cutting length of such an adjustable blade arrangement is adjusted by longitudinally offsetting the two cutting elements relative to each other, whereby the movable cutting element is usually offset longitudinally.
[0007] State-of-the-art solutions for adjusting the cutting length are known, allowing for either continuous or step-by-step adjustment. Both variants are used with roughly equal frequency, although one or the other is usually preferred depending on the user. This leads, particularly in hair salons with multiple hairdressers, to both continuously adjustable hair clippers and step-by-step adjustable hair clippers being available, although the majority of these two variants are not in use. As a result, the hair salons in question have low machine efficiency, which reduces overall profitability. State-of-the-art solutions are therefore not very cost-effective, inflexible, and often do not offer optimal adjustment options.
[0008] Description of the invention
[0009] The object of the present invention is therefore to overcome the problems known from the prior art, ie to provide a cost-effective, flexible and easily adjustable solution.
[0010] The object is achieved by a hair cutting device according to patent claim 1 and a cutting set for a hair cutting device according to patent claim 2. Further features embodying the invention are contained in the dependent patent claims.
[0011] A hair cutting device according to the invention comprises a blade arrangement with a first cutting element and a second, movable cutting element, a drive device which drives the blade arrangement, and a cutting length adjustment device which cooperates with the second cutting element in such a way that a longitudinal offset can be set between the first cutting element and the second cutting element, wherein the hair cutting device further comprises a selection device with which the cutting length adjustment device can be adjusted between at least one first length adjustment mode and at least one second length adjustment mode, wherein in the first length adjustment mode the longitudinal offset can be adjusted stepwise or continuously, i.e. continuously, and in the second length adjustment mode the longitudinal offset can be adjusted stepwise.Furthermore, a cutting set according to the invention for a hair cutting device has a blade arrangement with a first cutting element and a second, movable cutting element and a cutting length adjustment device which interacts with the second cutting element in such a way that a longitudinal offset can be set between the first cutting element and the second cutting element, wherein the cutting set further has a selection device with which the cutting length adjustment device can be adjusted between at least one first length adjustment mode and at least one second length adjustment mode, wherein in the first length adjustment mode the longitudinal offset can be adjusted stepwise or continuously, i.e. continuously, and in the second length adjustment mode the longitudinal offset can be adjusted stepwise. Such a selection device has the advantage that at least two different adjustment modes can be provided with one hair cutting device (e.g.continuous and stepped) and therefore enables an extremely flexible hair clipper or a flexible cutting set for a hair clipper. Furthermore, a cutting set with this selection device can also be retrofitted to a hair clipper. The cutting elements are preferably comb-shaped, i.e. they have corresponding teeth, with the first cutting element being designed in particular as a fixed shearing comb which comes into contact with the skin of the person or animal to be treated or the user. The second cutting element can also be designed as a movable shearing blade. The cutting elements are adjusted between a maximum longitudinal offset (maximum cutting length) and a minimum longitudinal offset (minimum cutting length), which, for example, in the case of comb-shaped cutting elements, leads to a minimum or maximum overlap of the cutting elements.The blade assembly preferably further comprises a tensioning element (e.g., a coupling spring) for pre-tensioning the cutting elements against each other, and a support device that serves as a housing for the blade assembly. The support device is preferably firmly connected to the first cutting element (e.g., with screws), so that the tensioning device can then be supported on the support device. The blade assembly can also preferably comprise a guide carriage, which can then displace the movable cutting element.
[0012] Preferably, the selection device can further comprise a selector switch, particularly designed as a slide or toggle switch. Such a selector switch, particularly a slide switch, is particularly space-saving and can be designed inconspicuously.
[0013] The selection device preferably further comprises a locking device, wherein the locking device has a plurality of locking positions and wherein the locking device is engaged or disengaged in the first length adjustment mode and engaged in the second length adjustment mode. The locking device is preferably designed in the manner of a gear or rack on the cutting length adjustment device or the guide shaft. This locking device is then preferably provided complementarily on the selector switch. These teeth or locking beads preferably have a triangular or trapezoidal cross-section, in particular with rounded corners or edges. Furthermore, the teeth on the cutting length adjustment device or the guide shaft and the teeth of the selector switch can slide over one another by applying force, thus enabling a stepped adjustment of the longitudinal offset.
[0014] The selection device can be designed such that the longitudinal offset can be adjusted in steps in the first length adjustment mode and continuously in the second length adjustment mode. The locking device is preferably disengaged in the first length adjustment mode.
[0015] The cutting length adjustment device further comprises, in particular, an adjustment lever which is connected to the second cutting element and with which the second cutting element can be displaced in the longitudinal direction relative to the first cutting element.
[0016] The adjustment lever is preferably reversibly connected to the cutting length adjustment device, so that it is designed to be detachable from the cutting length adjustment device. The adjustment lever is connected to the cutting length adjustment device, in particular, magnetically. This allows the adjustment lever to be easily removed and reattached to the hair clipper, so that the lever no longer interferes with use and can be quickly reattached when the cutting length needs to be adjusted.
[0017] The adjustment lever can be connected to the cutting length adjustment device at two different positions, in particular at the two opposite ends of the cutting length adjustment device. This allows a hair cutting device to be used by both right- and left-handed people, as the adjustment lever can be removed on one side and attached to the other. For this purpose, the adjustment lever is designed, in particular, symmetrically along a central plane. It can also have a plug-in device on each of its two sides with which the adjustment lever can be plugged onto the cutting length adjustment device. This eliminates the need to turn the lever when changing sides of the cutting length adjustment device, and other, possibly more ergonomic, non-symmetrical adjustment lever designs can also be used.
[0018] The adjustment lever is movable in particular within a range of 0° to 120°, preferably within a range of 0° to 90°, and particularly preferably within a range of 0° to 70°, in particular up to 62°. Furthermore, the cutting length adjustment device can be designed such that when the adjustment lever is moved toward a cutting area, the longitudinal offset is reduced, and when the adjustment lever is moved in the opposite direction, the longitudinal offset is increased.
[0019] The cutting length adjustment device is designed, in particular, as a guide shaft rotatable about an axis. Furthermore, the cutting length adjustment device preferably has at least one or two receptacles, which extend, in particular, radially to the axis. A plug-in cylinder of the guide carriage then preferably engages in each of these receptacles, with the plug-in cylinders being mounted for radial movement in the receptacle(s). Thus, the rotational movement of the cutting length adjustment device can be converted into a translational movement of the guide carriage.
[0020] The blade assembly preferably further comprises a guide carriage which interacts with the guide shaft of the cutting length adjustment device in such a way that a longitudinal movement of the guide carriage is generated by rotating the guide shaft.
[0021] The cutting length adjustment device can further include a longitudinal offset indicator. This can be formed by markings (e.g., lines) or numbers and is located in particular in the area of the lever. The longitudinal offset indicator is preferably designed as a scale, with the lever position at a specific point on the scale allowing a conclusion to be drawn about a specific longitudinal offset.
[0022] Furthermore, the hair-cutting device preferably comprises a coupling spring, wherein the cutting length adjustment device is coupled to the second cutting element by means of the coupling spring. Preferably, the coupling spring is further configured to transmit the adjustment of the longitudinal offset from the cutting length adjustment device to or to the second cutting element. In particular, the coupling spring is formed by the tensioning element, so that the coupling spring is configured to press the second cutting element against the first cutting element.
[0023] The longitudinal offset is the distance between two reference elements along a longitudinal axis of the hair-cutting device or cutting set. The longitudinal axis corresponds to an axis that extends from the operator to a position where hair is cut during operation of the hair-cutting device or cutting set. A transverse axis runs perpendicular to the longitudinal axis and parallel to a cutting edge. The cutting edge results from the arrangement of the first and second cutting elements and corresponds to the edge or line at which the cutting effect caused by the relative movement of the first and second cutting elements occurs.
[0024] The hair-cutting device or the cutting set preferably has a selection device comprising a locking plate that is biased toward the locking device and is movable with the selection slide. In particular, the locking plate is brought into and out of engagement with the locking device by means of a ramp. For this purpose, the locking plate preferably has a spring clip. The end of the locking plate is preferably latched into a recess in the freewheel position.
[0025] Short description of the characters
[0026] Fig. 1 a shows a hair cutting device in an isometric exploded view.
[0027] Fig. 1 b shows the hair cutting device shown in Fig. 1 a in a top view.
[0028] Fig. 2a shows a cutting set in an isometric view.
[0029] Fig. 2b shows the cutting set shown in Fig. 2a in a top view.
[0030] Fig. 2c shows the cutting set shown in Figs. 2a and 2b without carrier device in an isometric view and in a first length adjustment mode.
[0031] Fig. 2d shows the cutting set shown in Fig. 2c in a second length adjustment mode.
[0032] Fig. 2e shows the cutting set shown in Fig. 2d with carrier device and without first cutting element in a view from below.
[0033] Fig. 2f shows the cutting set shown in Fig. 2c in a side sectional view.
[0034] Fig. 2g shows the cutting set shown in Figs. 2d and 2e in a side sectional view.
[0035] Fig. 3a shows a selector switch in an isometric view.
[0036] Fig. 3b shows the selector switch shown in Fig. 3a in a side view.
[0037] Fig. 3c shows the selector switch shown in Figs. 3a and 3b in a top view.
[0038] Fig. 3d shows the selector switch shown in Figs. 3a to 3c in a view from below.
[0039] Fig. 3e shows the selector switch shown in Figs. 3a to 3d in a front view.
[0040] Fig. 4a shows a guide shaft in a front view. Fig. 4b shows the guide shaft shown in Fig. 4a in a top view.
[0041] Fig. 4c shows the guide shaft shown in Figs. 4a and 4b in a sectional view from the front.
[0042] Fig. 4d shows a cross section through a plug-in cylinder and a guide carriage holder;
[0043] Fig. 5a shows the guide shaft shown in Figs. 4a to 4c with an adjustment lever in a front view.
[0044] Fig. 5b shows the guide shaft with adjustment lever shown in Fig. 5a in a top view.
[0045] Fig. 5c shows the guide shaft with adjustment lever shown in Figs. 5a and 5b in a sectional view from the front.
[0046] Fig. 6 shows a locking device with a part of a selector switch complementary to this.
[0047] Fig. 7a shows a further locking device with a part of a selector switch complementary to this.
[0048] Fig. 7b shows a further locking device with a part of a selector switch complementary to this.
[0049] Fig. 7c shows another locking device with a part of a selector switch complementary to this.
[0050] Fig. 8a shows another cutting set with an adjustment lever in an isometric view.
[0051] Fig. 8b shows another cutting set with two adjustment levers in an isometric view.
[0052] Fig. 9a shows the cutting set shown in Figs. 2c and 2f with a small longitudinal offset in an isometric view. Fig. 9b shows the cutting set shown in Fig. 9a with a large longitudinal offset in an isometric view.
[0053] Fig. 10a shows a spring clip from a selection device in an isometric view with the selector switch in a first position.
[0054] Fig. 10b shows a spring clip from a selection device in an isometric view with the selector switch in a second position.
[0055] Fig. 1 1 a shows different views of a cutting set with an adjustment lever in a position for a long cutting position.
[0056] Fig. 1 1 b shows different views of a cutting set with an adjustment lever in a position for a middle cutting position.
[0057] Fig. 1 1c shows different views of a cutting set with an adjustment lever in a position for a short cutting position.
[0058] Fig. 12a shows different views of a cutting set with an adjustment lever in a position for a long cutting position.
[0059] Fig. 12b shows different views of a cutting set with an adjustment lever in a position for a middle cutting position.
[0060] Fig. 12c shows different views of a cutting set with an adjustment lever in a position for a short cutting position.
[0061] Description of the preferred embodiments
[0062] Fig. 1a shows a hair-cutting device 100 in an isometric exploded view. The hair-cutting device 100 has a drive device 105. The drive device 105 typically has an electric motor powered by a rechargeable battery or via a cable. Furthermore, the hair-cutting device 100 has a blade assembly 250, which preferably comprises a first cutting element 110, a second cutting element 112, a guide carriage 120, a support device 170, and a coupling spring 180. Furthermore, a cutting-length adjustment device is also provided, which is designed to adjust the longitudinal displacement between the first and second cutting elements. In the form shown here, this cutting-length adjustment device has an adjustment lever 140, a selection device 150 with a guide shaft 130, and a selection switch 160. The drive device 105 serves to drive the second cutting element 112.For this purpose, a drive receptacle 114 is provided on the second cutting element 112, which can be coupled to the drive device 105. Here, the drive receptacle 114 is designed as a double wing, between which an eccentrically rotating pin of the drive device is received. The second cutting element 112 can be moved or driven relative to the first cutting element 110 along and counter to a transverse direction 402 by means of the drive device 105. The second cutting element 112 can also be moved relative to the first cutting element 110 along and counter to a longitudinal direction 401 by means of the adjusting lever 140.
[0063] Fig. 1 b shows the hair cutting device 100 shown in Fig. 1 a in a plan view in a completely assembled state.
[0064] Fig. 2a shows an isometric view of a cutting set 200. With the exception of the drive device 105, the cutting set 200 has the same components as the hair cutting device 100 shown in Figs. 1a and 1b. In contrast to the hair cutting device 100 shown in Fig. 1a, the components shown are in the assembled, i.e., ready-to-use state. The carrier device 170 covers the second cutting element 112, the coupling spring 180, the guide carriage 120, and the guide shaft 130, or fixes them against the first cutting element 110 (cf. Fig. 1a). The selector switch 160 is exposed and thus easily accessible to an operator. However, the selector switch 160 can also be covered, at least during operation, to prevent unintentional adjustment or displacement.In the area of the drive receptacle 114, the support device 170 has a recess so that the drive device 105 can be coupled to the drive receptacle 114.
[0065] Fig. 2b shows the cutting set 200 shown in Fig. 2a in a plan view.
[0066] Fig. 2c shows the cutting set 200 shown in Figs. 2a and 2b without the support device 170 in an isometric view and in a first length adjustment mode 301. The selector switch 160 is displaced counter to the transverse direction 402 on the guide shaft 130. Fig. 2d shows the cutting set 200 shown in Fig. 2c in a second length adjustment mode 302. The selector switch 160 is displaced along the transverse direction 402 on the guide shaft 130.
[0067] Fig. 2e shows the cutting set 200 shown in Fig. 2d with the support device 170 and without the first cutting element 112 in a bottom view. The guide shaft 130 has a coupling spring receptacle 136 in which the coupling spring 180 is received. The coupling spring 180 is also connected to the second cutting element 112. The coupling spring 180 is guided along or counter to the longitudinal direction 401 by means of the guide slide 120. In this way, the second cutting element 112 can also be moved along or counter to the longitudinal direction.
[0068] Fig. 2f shows the cutting set 200 shown in Fig. 2c in a lateral sectional view 500-500. The sectional view 500-500 corresponds to the section line shown in Fig. 2e and designated by reference numeral 500. The selection device 150 (see Fig. 1a) has a locking device 132 arranged on the guide shaft 130. The locking device 132 is engaged with the selection switch 160. This configuration corresponds to the first length adjustment mode 301 (see Fig. 2c), in which the longitudinal offset of the first and second cutting elements 110, 112 relative to one another can be adjusted in steps.
[0069] Fig. 2g shows the cutting set 200 shown in Figs. 2d and 2e in the lateral sectional view 500-500 also shown in Fig. 2f. The cutting set 200 is in the second length adjustment mode 302 (see Fig. 2d), ie the selector switch 160 is not engaged with the locking device 132. In the second length adjustment mode 302, the longitudinal offset of the first and second cutting elements 110, 112 relative to one another is continuously adjustable.
[0070] Fig. 3a shows an isometric view of a selector switch 160. The selector switch 160 has two snap bulges 162, only one of which is visible in Fig. 3a. The selector switch 160 can also have only one snap bulge 162, more than two snap bulges 162, or no snap bulge 162 at all. The snap bulge 162 or the snap bulges 162 serve to lock the selector switch 160 in a selection position, which then corresponds to a length adjustment mode, e.g., the first or second length adjustment mode 301, 302. The locking of the selector switch 160 can be implemented, in particular, with the aid of the support device 170. For this purpose, the support device 170 can have one or more recesses matching the snap bead 162 or the snap beads 162, into which the snap bead 162 or snap beads 162 snap and thus lock a positioning of the selector switch 160 on the guide shaft 130.In order to move the selector switch 160 out of its respective position, i.e., to move it opposite to or along the transverse direction 402, the operator must first overcome the resistance of the snap bead 162 or the snap beads 162. The selector switch 160 also has three locking beads 164 designed to interact with the locking device 132. If the hair cutting device 100 or the cutting set 200 is in the first length adjustment mode 301, the three locking beads 164 prevent the guide shaft 130 from being continuously rotated. Rather, the three locking beads 164 ensure that the guide shaft 130 can only be rotated in steps, i.e., from locking bead 164 to locking bead 164. Accordingly, the longitudinal offset of the first and second cutting elements 110, 112 relative to one another, ie along the longitudinal direction 401, can also only be adjusted in steps.The fineness of the adjustability of the longitudinal offset corresponds to the distance between the individual locking beads 164. Furthermore, fewer locking beads 164 can be provided, for example, one locking bead 164 or two locking beads 164, but also more than three locking beads 164, for example, five, ten, or fifteen locking beads 164.
[0071] Fig. 3b shows a side view of the selector switch 160 shown in Fig. 3a. The three locking bulges 164 are arranged essentially on a circular segment and are thus arranged facing the locking device 132, which is located on the essentially round guide shaft 130. The two snap bulges 162 protrude from the selector switch 160 counter to the longitudinal direction 401. Further orientations of the snap bulges 162 are also possible, for example, that they protrude from the selector switch 160 along the longitudinal direction 401, or protrude from the selector switch 160 along or counter to the transverse direction 402, or from an upper side of the selector switch 160.
[0072] Fig. 3c shows the selector switch 160 shown in Figs. 3a and 3b in a top view. In Fig. 3c, both snap beads 162 are visible. Fig. 3d shows the selector switch 160 shown in Figs. 3a to 3c in a bottom view. In Fig. 3d it can be seen that the selector switch 160 here has three additional locking beads 164, each arranged opposite one of the three locking beads 164 visible in Figs. 3a and 3b. There is a free space between the opposing locking beads 164. Fig. 3e shows the selector switch 160 shown in Figs. 3a to 3d in a front view. In principle, the locking beads 164 are not fixed. Preferably, a plurality of locking ridges 164 are formed on the guide shaft 130 or the selector switch, so that a plurality of setting stages are possible.Fewer locking beads are provided on the complementary counter element, preferably one to five locking beads, but in particular the three locking beads shown here. Three is the best number in terms of a compromise between wear, the force required for adjustment, and haptic feedback. Preferably, the locking beads of the guide shaft 130 and the selector switch can each have a different geometry, so that, for example, the selector switch has locking elements twice as large as the guide shaft. Finer gradation can then be achieved using finer locking elements. However, the geometry of the locking elements should be coordinated so that the locking elements can engage with one another simultaneously.
[0073] Fig. 4a shows a guide shaft 130 in a front view. The guide shaft 130 has two adjustment lever receptacles 134 arranged at each lateral end. An adjustment lever 140 can be received in each of the adjustment lever receptacles 134 such that the guide shaft 130 can be rotated by means of the adjustment lever 140. The guide shaft 130 further has two guide carriage receptacles 138, into which in particular two plug-in cylinders of the guide carriage 120 can be received. These plug-in cylinders 124 are in particular arranged on each arm of the guide carriage 120, which extends in the direction of the guide shaft 130. If the guide shaft 130 is rotated, the guide carriage 120 and thus the second cutting element 112 are displaced along or counter to the longitudinal direction 401. The guide shaft 130 also has two locking devices 132.Directly along the transverse direction 402, adjacent to a locking device 132, the guide shaft 130 has a smooth surface. If the selector switch 160 or its locking ridges 164 are located above the smooth surface, the longitudinal offset is continuously adjustable. The smooth surfaces are each essentially as wide as the free space between the locking ridges 164 visible in Fig. 3d.
[0074] Fig. 4b shows a top view of the guide shaft 130 shown in Fig. 4a. In Fig. 4b, it can be seen that the two guide carriage receptacles 138 are each limited at the end with respect to the longitudinal direction 401. This allows the guide carriage 120 to be guided securely both along and against the longitudinal direction 401.
[0075] Fig. 4c shows the guide shaft 130 shown in Figs. 4a and 4b in a sectional view 510-510 from the front. The sectional view 510-510 corresponds to the section line shown in Fig. 4b and designated by reference numeral 510. It can be seen that the two adjustment lever receptacles 134 each extend into the guide shaft 130 with respect to the transverse direction 402. This allows the adjustment lever 140 to be securely received in the respective adjustment lever receptacle 134.
[0076] Figure 4d shows a cross-section through a guide carriage receptacle 138 in which a plug-in cylinder 125 is arranged. The guide carriage receptacle 138 is radially longer than the plug-in cylinder 125, so that the plug-in cylinder 125 can move radially to the axis of the guide shaft 130. When the guide shaft 130 rotates, the plug-in cylinder is displaced toward or away from the cutting elements 110, 112 (see arrow A) and slides radially in the guide carriage receptacle 138.
[0077] Fig. 5a shows the guide shaft 130 shown in Figs. 4a to 4d with an adjustment lever 140 in a front view. The adjustment lever 140 is received at its lower end in the adjustment lever receptacle 134 shown on the left in the view. The adjustment lever 140 further has a first actuating region 141, via which the adjustment lever 140 can be actuated or rotated along the longitudinal direction 401 (i.e., rotates about the axial direction 402). Upon corresponding actuation of the adjustment lever 140, the guide shaft 130 is also rotated along the longitudinal direction 401 or about the axial direction 402 of the longitudinal axis of the guide shaft.
[0078] Fig. 5b shows a top view of the guide shaft 130 shown in Fig. 5a with the adjustment lever 140. The adjustment lever 140 further has a second actuation region 142, with which the adjustment lever 140 can be actuated counter to the longitudinal direction 401. Upon corresponding actuation of the adjustment lever 140, the guide shaft 130 is also rotated counter to the longitudinal direction 401.
[0079] Fig. 5c shows the guide shaft 130 with the adjustment lever 140 shown in Figs. 5a and 5b in a sectional view 520-520 from the front. The sectional view 520-520 corresponds to the section line shown in Fig. 4b and designated by reference numeral 520.
[0080] Fig. 6 shows a locking device 132 with a part of a selector switch 160 that is complementary to it. Fig. 6 shows the part of the selector switch 160 in or on which the locking beads 164 are arranged. The locking device 132 has a plurality of locking teeth 133, whereby only two locking teeth 133 are identified in Fig. 6. The locking teeth 133 are designed to be complementary to the locking beads 164. When the selector switch 160 is engaged with the locking device 132, a locking bead 164 is arranged between two locking teeth 133 or a locking tooth 133 is arranged between two locking beads 164, whereby an outer surface of a locking tooth 133 touches an outer surface of a locking bead 164. The fineness of the step-by-step adjustment of the longitudinal offset in the first length adjustment mode 301 can be adjusted by means of the distance between the locking beads 164 or locking teeth 133. With small distances between the locking beads 164 orThe relative positioning of the locking teeth 133 results in a fine adjustment of the longitudinal offset, while large distances result in a correspondingly coarse adjustment. It is also possible for both the first and the second length adjustment modes 301, 302 to enable a step-by-step adjustment of the longitudinal offset. For this purpose, a selection device 150 can be provided (cf. Fig. 1 a), with which the selector switch 160 can be displaced between two differently configured locking devices 132, wherein the two locking devices 132 are designed with different configurations of the locking teeth 133, each with a different spacing of the locking teeth 133 from one another.
[0081] Fig. 7a shows another locking device 132 with a complementary part of a selector switch 160. The locking device 132 has a plurality of locking teeth 133 distributed over the entire circumference of the locking device 132. This allows the guide shaft 130 to be rotated at least once completely around its longitudinal axis. Of the locking teeth 133, only two are identified by reference numerals. The illustrated part of the selector switch 160, in contrast, has only four adjacent locking ridges 164, of which only two are identified by reference numerals in the illustration.
[0082] Fig. 7b shows another locking device 132 with a complementary part of a selector switch 160. In contrast to the locking device 132 shown in Fig. 7a, the locking device 132 shown in Fig. 7b has locking teeth 133 distributed only around approximately half its circumference. This allows the guide shaft 130 to be rotated approximately 180°.
[0083] Fig. 7c shows another locking device 132 with a complementary part of a selector switch 160. The illustrated part of the selector switch 160 has a plurality of locking ridges 164 or locking teeth 133 distributed around its entire circumference. The locking device 132, like the locking device 132 shown in Fig. 7b, has locking teeth 133 distributed around approximately half its circumference. Fig. 8a shows another cutting set 200 with an adjustment lever 140 in an isometric view. In contrast to the cutting sets 200 shown in Figs. 2a to 2e, in the cutting set 200 shown in Fig. 8a the adjusting lever is arranged on the opposite side, ie along the transverse direction 402 at the far end of the cutting set 200 or on the right side of the cutting set 200 viewed in the longitudinal direction 401. The guide shaft 130 has two opposing adjusting lever receptacles 134 for this purpose, as shown in Figs. 4a to 4c.In this way, it can be made possible for the adjustment lever 134 to be arranged on the left or right side of the cutting set 200 depending on the operator's preference, for example on the right side for a right-handed operator as shown in Fig. 8a or on the left side for a left-handed operator as shown in Figs. 2a to 2e.
[0084] Fig. 8b shows an isometric view of another cutting set 200 with two adjustment levers 140. Such a cutting set is easy to handle by both right-handed and left-handed operators.
[0085] Fig. 9a shows the cutting set 200 shown in Figs. 2c and 2f with a slight longitudinal offset in an isometric view. The adjustment lever 140 is offset very far forward along the longitudinal direction 401. Thus, the guide shaft 130 is rotated along the longitudinal direction 401, and the front edges of the first and second cutting elements 110, 112 are arranged close together.
[0086] Fig. 9b shows the cutting set 200 shown in Fig. 9a with a large longitudinal offset in an isometric view. In contrast to the configuration shown in Fig. 9a, the adjustment lever 140 is offset very far rearward relative to the longitudinal direction 401. Thus, the guide shaft 130 is rotated relative to the longitudinal direction 401, and the front edges of the first and second cutting elements 110, 112 are arranged far apart.
[0087] Fig. 10a and 10b show a locking plate 152 for a selection device in which the selector switch 160 is formed separately from the locking bead 164. In this embodiment, switching between a step-by-step and continuous setting is achieved by a locking bead 164 locking into the locking device 132 (e.g., between the locking teeth 133 or into a recess formed on the guide shaft 130) or being moved away from the locking device 132. In principle, one locking device 132 is sufficient for the locking plate 152, but several locking devices 132 can also be provided on the guide shaft 130 and, preferably, complementary thereto, several laterally offset locking beads 164 on the locking plate. Likewise, several locking beads can be arranged one behind the other on the locking plate. For the locking of the locking bead 164, the locking plate 152 has a spring clip 156 which is pre-tensioned in the direction of the locking device.The selector switch 160 can be in a detent position and a freewheel position. In the detent position, the selector switch 160 is not engaged with the detent plate 152. The spring clip 156 of the detent plate is engaged with the detent device 132 due to the pretension and signals the stepped length adjustment of the cutting blades, for example via the interaction of the detent bead 164 with the detent teeth 133 of the detent device 132. When the selector switch 160 is then pushed into a freewheel position, the spring clip of the detent plate is lifted out of engagement with the detent device 132, and the continuous length adjustment mode is provided. Here, this is accomplished in such a way that a ramp 161 on the selector switch 160 lifts the end 154 of the spring clip 156 out of engagement with the detent device 132 by sliding the selector switch 160.The end 154 of the spring clip 156 can then preferably engage in a depression 163 in the freewheel position, so that accidental or spontaneous slipping of the selector switch 160 can be avoided.
[0088] Figures 11a, 11b, 11c, 12a, 12b and 12c each show two side views, a top view and a sectional view of a cutting set 200 with a locking plate 152. The cutting set 200 has the same components as the cutting sets shown in Figures 2a and 2b, except for the different design of the selector switch 160 and the locking plate 152. In Figures 11a, 11b and 11c, the selector switch is in a locking position so that the spring clip 156 is engaged in the locking device 132 of the guide shaft 130. In Figure 11a, a long cutting length is set, in which the cutting blades are spaced apart by a large distance. In Figure 11b, a medium cutting length is set, and in Figure 11c, a short cutting length. In the sections of Figures 11 b and 11 c it can be seen that the locking bead 164 has jumped one locking tooth 133 further.
[0089] In Figures 12a, 12b, and 12c, the selector switch is in a freewheel position, so that the spring clip 156 is lifted out of the locking device 132 of the guide shaft 130. In Figure 12a, a long cutting length is set, in which the cutting blades are spaced apart by a large distance. In Figure 12b, a medium cutting length is set, and in Figure 12c, a short cutting length. The locking bead 164 is lifted away from the locking device here, since the cutting length adjustment is continuous. The locking plate 152 can be combined as desired with the previously described embodiments (one or two locking devices, all lever designs, etc.), provided that the locking and extending movement described in connection with the locking plate 152 can be used instead of a lateral displacement of the locking bead 164.
[0090] List of reference symbols
[0091] 100 hair clippers
[0092] 105 Drive device
[0093] 110 first cutting element
[0094] 112 second cutting element
[0095] 114 Drive mount
[0096] 120 guide carriages
[0097] 124 plug-in cylinders
[0098] 130 leadership
[0099] 132 locking device
[0100] 133 locking tooth
[0101] 134 Adjustment lever holder
[0102] 136 Coupling spring holder
[0103] 138 Guide carriage holder
[0104] 140 adjustment lever
[0105] 141 first operating area
[0106] 142 second operating area
[0107] 150 voting facilities
[0108] 152 locking plate
[0109] 156 spring clips
[0110] 160 selector switches
[0111] 161 Ramp
[0112] 162 Snap bead
[0113] 163 depression
[0114] 164 locking bead
[0115] 166 sliding bodies
[0116] 170 carrier device
[0117] 180 coupling spring
[0118] 200 cutting set
[0119] 250 Blade arrangement 301 first length adjustment mode
[0120] 302 second length adjustment mode
[0121] 401 Longitudinal direction
[0122] 402 Transverse direction 500-500 Sectional view
[0123] 510-510 Sectional view
[0124] 520-520 sectional view
Claims
Hair cutting device (100), comprising a blade arrangement (250) with a first cutting element (110) and a second, movable cutting element (112), a drive device which drives the blade arrangement (200), and a cutting length adjustment device (130) which cooperates with the second cutting element (112) in such a way that a longitudinal offset can be set between the first cutting element (110) and the second cutting element (112), characterized in that the hair cutting device (100) further comprises a selection device (150) with which the cutting length adjustment device (130) can be adjusted between at least one first length adjustment mode (301) and at least one second length adjustment mode (302), wherein in the first length adjustment mode (301) the longitudinal offset can be adjusted stepwise or continuously and in the second length adjustment mode (302) the longitudinal offset can be adjusted in steps.Cutting set (200) for a hair cutting device, comprising a blade arrangement (250) with a first cutting element (110) and a second, movable cutting element (112), and a cutting length adjustment device (130) which cooperates with the second cutting element () in such a way that a longitudinal offset can be set between the first cutting element () and the second cutting element (), characterized in that the cutting set (200) further comprises a selection device (150) with which the cutting length adjustment device (130) can be adjusted between at least one first length adjustment mode (301) and at least one second length adjustment mode (302), wherein in the first length adjustment mode (301) the longitudinal offset can be adjusted stepwise or continuously and in the second length adjustment mode (302) the longitudinal offset can be adjusted stepwise.
3. Hair cutting device (100) or cutting set (200) according to one of the preceding claims, wherein the selection device (150) further comprises a selection switch (160).
4. Hair cutting device (100) or cutting set (200) according to one of the preceding claims, wherein the selection device (150) further comprises a locking device (132), wherein the locking device (132) has a plurality of locking positions, and wherein the locking device (132) is locked or unlocked in the first length adjustment mode (301) and is locked in the second length adjustment mode (302).
5. Hair cutting device (100) or cutting set (200) according to one of the preceding claims, wherein the cutting length adjustment device is designed as a guide shaft (130) rotatable about an axis.
6. Hair cutting device (100) or cutting set (200) according to claims 4 or 5, wherein the locking device (132) is disengaged in the first length adjustment mode (301).
7. Hair cutting device (100) or cutting set (200) according to one of the preceding claims, wherein the cutting length adjustment device further comprises an adjustment lever (140).
8. Hair cutting device (100) or cutting set (200) according to claim 7, wherein the adjusting lever (140) is reversibly connected to the cutting length adjusting device.
9. Hair cutting device (100) or cutting set (200) according to claim 8, wherein the Adjustment lever (132) at two different positions with the Cutting length adjustment device can be connected.
10. Hair cutting device (100) or cutting set (200) according to one of claims 7 to 9, wherein the adjusting lever () is movable in a range from 0° to 120°, preferably in a range from 0° to 90° and particularly preferably in a range from 0° to 70°, in particular 62°.
11. Hair cutting device (100) or cutting set (200) according to one of claims 7 to 10, wherein the cutting length adjustment device is designed such that Moving the adjusting lever (140) toward a cutting area reduces the longitudinal offset, and moving the adjusting lever (132) in the opposite direction increases the longitudinal offset. Hair-cutting device (100) or cutting set (200) according to one of claims 7 to 11, wherein the blade arrangement further comprises a guide carriage which interacts with the guide shaft of the cutting-length adjusting device such that rotating the guide shaft (130) produces a longitudinal movement of the guide carriage. Hair-cutting device (100) or cutting set (200) according to one of the preceding claims, in particular according to one of claims 7 to 12, wherein the cutting-length adjusting device further comprises a longitudinal offset indicator.Hair-cutting device (100) or cutting set (200) according to one of the preceding claims, further comprising a coupling spring (180), wherein the cutting length adjustment device is coupled to the second cutting element (112) by means of the coupling spring (180). Hair-cutting device (100) or cutting set (200) according to claim 14, wherein the coupling spring (180) is further configured to press the second cutting element (112) against the first cutting element (110). Hair-cutting device (100) or cutting set (200) according to one of the preceding claims, wherein the selection device (150) has a locking plate (152) which is pretensioned in the direction of the locking device (132) and is movable with the selection slide (160).