Search

DE-102024133192-A1 - Hair cutting device with a cutting length adjustment device

DE102024133192A1DE 102024133192 A1DE102024133192 A1DE 102024133192A1DE-102024133192-A1

Abstract

Hair cutting device (100) comprising a blade assembly (102) with a first longitudinally movable cutting element (104) and a second, transversely movable cutting element (106), a drive device that drives the blade assembly (102), and a cutting length adjustment device that interacts with the first cutting element (104) such that a longitudinal offset can be adjusted between the first cutting element (104) and the second cutting element (106), wherein the cutting length adjustment device has a lever (12) with a pre-tensioned detent lug (14) for adjusting the second, movable cutting element and at least one retaining recess such that the detent lug (14) engages in the retaining recess, wherein the lever (12) further comprises a sliding sleeve (24) which, in a first position, holds the detent lug (14) against the pre-tensioning force, and in a second position (14) releases.

Inventors

  • Dominik Weiss

Assignees

  • WAHL GMBH

Dates

Publication Date
20260513
Application Date
20241113

Claims (11)

  1. Hair cutting device (100) comprising a blade assembly (102) with a first cutting element (104) and a second cutting element (106) which is designed to be movable at least laterally relative to the first cutting element, a drive device which drives the blade assembly (102), and a cutting length adjustment device which interacts with the first cutting element (104) or second cutting element (106) such that a longitudinal offset can be adjusted between the first cutting element (104) and the second cutting element (106), wherein the cutting length adjustment device has a lever (12) with a pre-tensioned detent lug (14) for adjusting the first or second cutting element and at least one retaining element. has a recess so that the locking lug (14) engages in the retaining recess, characterized in that the lever (12) further has a sliding sleeve (24) which in a first position holds the locking lug (14) against the preload force, and in a second position releases the locking lug (14).
  2. Hair cutting device (100) according to Claim 1 , in which the sliding sleeve (24) at least partially surrounds the lever (12).
  3. Hair cutting device (100) according to one of the preceding claims, wherein the sliding sleeve (24) engages in a groove (18) of the lever (12) on the upper and lower sides of the lever.
  4. Hair cutting device (100) according to one of the preceding claims, wherein the locking lug (14) is at least partially conical in shape.
  5. Hair cutting device (100) according to one of the preceding claims, wherein the sliding sleeve (24) has a recess (30) on the side of the locking lug (14).
  6. Hair cutting device (100) according to Claim 5 , in which the recess (30) tapers from one entrance end to the other end.
  7. Hair cutting device (100) according to Claim 5 or 6 , in which the recess at one end is circular in order to provide a seat (34) for the locking lug (14).
  8. Hair cutting device (100) according to one of the Claims 5 until 7 , in which the recess (30) at the inlet end is larger than the diameter of the locking lug (149) that protrudes from the lever (12).
  9. Hair cutting device (100) according to one of the Claims 5 until 8 , in which the sliding sleeve (24) serves as a stop for the locking lug (14) in the second position, so that the locking lug (14) is held by the sliding sleeve in the opening (20).
  10. Hair cutting device (100) according to one of the preceding claims, wherein the sliding sleeve (24) projects beyond the surface of the lever (12) on at least one side of the lever (12).
  11. Hair cutting device (100) according to one of the preceding claims, wherein the lever (12) is at least partially flat on the side facing the hair cutting device (100).

Description

Field of invention The invention relates to a hair cutting device with a cutting length adjustment device with a switching function. State of the art Hair-cutting devices with a cutting length adjustment mechanism are known in the prior art. Typically, a hair-cutting device has a blade arrangement with two cutting elements. A first cutting element is longitudinally displaceable for adjusting the cutting length and is fixed to the rest of the hair-cutting device during the cutting process. A second cutting element is arranged to oscillate laterally relative to the first and is used to cut the hair during the cutting process. Frequently, cutting elements with comb-like cutting edges are used. In this case, the first cutting element is designed as a so-called shearing comb and comes into contact with the skin of the person or animal being treated, or the user. The second cutting element is then designed as a so-called shearing blade. Each cutting element has a series of spaced-apart teeth, which are generally arranged at regular intervals. Such a blade arrangement can be designed to allow for the adjustment of different cutting lengths. The cutting length of such an adjustable blade arrangement is adjusted by longitudinally offsetting the two cutting elements relative to each other, whereby in removable/replaceable blade arrangements, the second, laterally movable cutting element is usually offset longitudinally, while in blade arrangements permanently connected to the hair cutting device, the first cutting element is usually offset longitudinally. Solutions for adjusting the cutting length are known from the prior art, allowing for either stepless or incremental adjustment. Both variants occur with roughly equal frequency, although one or the other is usually preferred depending on the user. This leads to a situation, particularly in hair salons with multiple hairdressers, where both stepless and incrementally adjustable hair cutting devices are present, although most of these variants are not in use. As a result, these salons experience low machine efficiency, which in turn reduces overall profitability. Solutions known from the state of the art are therefore not very economical, inflexible and often do not offer the optimal adjustment options. Description of the invention The object of the present invention is to provide a hair cutting device with a cutting length adjustment device in which it is easy to switch back and forth between a stepless and a stepped adjustment mode. This object is achieved with a hair cutting device according to claim 1. A hair cutting device according to the invention comprises a blade arrangement with a first cutting element and a second cutting element, which is designed to be movable at least laterally relative to the first cutting element, a drive device that drives the blade arrangement, and a cutting length adjustment device that interacts with the first cutting element in such a way that a longitudinal offset can be adjusted between the first cutting element and the second cutting element, wherein the cutting length adjustment device has a lever with a pre-tensioned detent for adjusting the first movable cutting element and at least one retaining recess, such that the detent engages in the retaining recess, making it difficult, in particular preventing, the lever from moving out of the retaining recess, wherein the lever further comprises a sliding sleeve that, in a first position, holds the detent against the pre-tension force, and, in a second position, releases the detent. Because the cutting length adjustment device is located outside the hair clipper and a switching function is provided on the cutting length adjustment device, switching between modes is easy. Furthermore, no complicated mechanics are required inside the hair clipper, since the mode switching device, which includes the locking tab and retaining recess, is located on the cutting length adjustment device outside the hair clipper. The sliding sleeve preferably surrounds the lever at least partially. This ensures a secure hold of the sliding sleeve on the lever. The sliding sleeve can be completely closed, thus enclosing the lever entirely. However, it is preferred that the sliding sleeve completely covers the lever on the side of the locking lug and engages in a groove on the upper and lower sides of the lever. This allows the sliding sleeve to interact securely with the locking lug and simultaneously ensures that the sleeve remains accessible. If the lever has a rectangular or square cross-section, the sleeve extends especially over 2/3 of the top and/or bottom of the lever. The retaining projection is preferably conical in shape and further features a hemispherical end, particularly at its tip. The end may have a flat section. This allows it to slide more easily into the retaining recess, and also enables the sliding sleeve to move the locking lug against the preload force without the need for tools. The