JPH0363089A - Dry shaver - Google Patents

Abstract

PURPOSE: To surely fix a shaving head onto a housing by mutually combining the vertically extending side surfaces of a plate-like part and a recessed place through a dove tail and elastically supporting one projecting locking element on the side surface of the recessed place within the plate-like part. CONSTITUTION: In the inserting operation of the housing 1 and the shaving head 2, until the locking element 17 or locking elements 37 and 38 are engaged with a recess 25 provided at an inner surface 24 or recesses 43 and 44 provided at side surfaces 31 and 32 by the operation of springs 26 and 39, the head 2 moves the locking elements 17 or 37, 38 into a free space 16 against the pressure of each respective spring 26 or 39. In a state where the housing 1 and the head 2 are locked, the dove tail opposed surfaces of the plate-like part 11 and the recessed place 23 are made into a shape combined state and a so-called closely adhered seat is formed by it.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a dry shaver having a housing and a shaving head removably held in the housing via at least one resilient locking element.

[Conventional technology]

A dry shaver of the type described above is known from German Patent No. 36 31 120 A1. The sides of the housing are stepped inwardly on all sides in the fixation area of the removable shaving head. On the inner surface of the shaving head, this step of the upper housing part is well matched to the configuration. The locking of the shaving head onto the inwardly stepped housing portion is achieved by means of an engagement protrusion provided on the side of the shaving head which fits into an engagement groove in the housing portion, and an engagement protrusion located on the opposite side that fits manually. and a lock release device to be operated. The lock release device is arranged in a chamber provided in the housing and has a spring-loaded locking element protruding from the chamber, the locking protrusion of which fits into an engagement groove on the side of the shaving head. It is crowded. The locking element is provided with an operating element projecting from the wall of the housing for unlocking the shaving head. Since such a lock release device can only be unlocked from one side of the shaving head, the user is forced to reverse lock by rotating and moving the shaving head.

It is known from DE 34 15 121 C2 to arrange spring-loaded locking elements on both sides of the housing for locking and unlocking a removable shaving head. This locking element is moved out of the locking position via an operating element arranged on the side of the shaving head for easy removal of the shaving head.

[Problem to be solved by the invention]

The object of the invention is to obtain a fixing device with which a shaving head is securely fixed on a housing. The fixing device is simple in construction, saves space, can be manufactured at low cost, and is easy and graceful for the user to remove and install the shaving head from the shaver housing. It must be possible.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides the dry shaver mentioned at the beginning, in which at least one of the side surfaces of the housing is provided with a plate-shaped portion having a profile tapering toward the upper housing surface, and the shaving head is A recess corresponding to the contour of the plate is provided in the side surface belonging to the plate, the vertically extending sides of the plate and the recess are connected to each other via a tab tail; At least one locking element protruding from one of the sides of the recess is externally supported.

A simple and cost-effective construction of the inventive shaving head/housing fastening device is obtained by adapting the configurations of at least one wide side of the housing and at least one wide side of the shaving head to one another.

The positive coupling of the recess on the wide side of the shaving head and the plate-like part on the wide side of the housing by means of the tab tails on each vertically extending side ensures that the shaving head is firmly placed on the housing. Guaranteed a good seat. The tapering profile of the plate to the upper housing surface allows problem-free assembly and insertion of the provided tab tails during installation of the shaving head. Locking the shaving head onto the housing
This is done by means of a locking element which is elastically supported within the plate and which engages in a corresponding recess provided in the wide side.

Transferring the locking element into a wider surface of the housing increases the internal space of the housing, which can therefore be better utilized for mounting the electric drive. The locking element can be pushed into the plate from the outside. Assembly can therefore be carried out in a technically simple and cost-effective manner. Sealing means to prevent the ingress of hair and water into the interior of the housing are not required by moving the locking element to the plate.

According to a preferred embodiment of the invention, the plate and the recess have an isosceles trapezoidal contour, the shorter of the unequal length sides being located within the upper housing surface. .

According to another configuration of the present invention, the contours of the plate-shaped portion and the recess are each formed by two mutually extending side surfaces and one side surface formed in an arch shape that connects these two side surfaces. There is.

The side surfaces connecting the sides can advantageously be part of a tabtail.

According to an advantageous embodiment of the invention, the housing is formed stepwise from the upper housing side to the wide side, and the plate-shaped portion is provided on the vertical side surface and terminates on the horizontal stepped side surface.

The tiering 1 thus provides additional support to the mounted shaving head. Furthermore, by suitably defining the wall thickness of the wide side of the shaving head, it is possible to align the transition from the outer surface of the housing to the face of the shaving head, which is desirable for aesthetic reasons.

According to an advantageous embodiment of the invention, the shaving head is designed in a stepped manner and is provided with a recess in a wide surface projecting from the underside of the shaving head, which has an opening directed toward the housing. This configuration makes it possible, for example, to place the long hair cutter on the wide side of the housing opposite the plate.

Preferably, a cavity is provided in the plate-like part, in which a locking element having a locking projection projecting from the cavity is elastically supported. Advantageously, the inner surface of the wide side of the recess is provided with a recess for engagement with the locking projection.

According to another configuration of the invention, the plate-shaped portion includes a cavity and at least one through hole extending from the cavity to the tab tail,
A locking element projecting into the tab tail is slidably supported in the through hole, a spring biasing the locking element is disposed in the cavity, and a recess is provided in the tab tail of the shaving head as an engagement element for the locking element. ing.

According to a preferred embodiment of the invention, the upper/X housing surface is of flat design and the shaving head rests on the upper housing surface with at least three of its sides. This configuration facilitates the removal of shaving-induced lint from the upper housing surface.

In order to prevent hair generated during shaving from coming out from the inside of the shaving head, the side edges of the upper housing surface and the side edges of the shaving head are formed to overlap in a stepped manner.

〔Example〕

Next, the present invention will be described in more detail with reference to embodiments shown in the drawings.

FIG. 1 shows a shaver with a shaving head 2 arranged removably from a housing 1, in which outer cutters 3 are arranged between two sides 20, 21. There is. The front wide side of the housing 1 is 4, and the wide side of the shaving head 2 is 5
is shown. The shape and position of the fastening elements on the wide side 4 of the housing 1 and on the wide side of the shaving head 2, including the horizontally running upper edge 6 of the housing 1, are indicated by dashed lines and are shown in FIGS. This will be explained in detail with reference to FIG.

2 and 4, the upper part of the housing 1 is shown in perspective view. The upper housing surface 7 consists of a plate which is flat and has a hole 8, which plate is removably connected to the side surface of the housing so that, for example, a drive mechanism of a shaver can be inserted into the housing from above. .

A centrally located hole 8 is used for passing a drive pin 10 which drives the inner cutter 9 of the shaver, as can be seen in FIG.

The wide side 4 of the housing 1 is stepped towards the upper housing side 7. The vertical side surface formed by this step is 4.1, and the side surface running horizontally is 4.1.
2. The horizontal side surface 4.2 has a slight slope from the rear vertical side surface 4.1 to the wide side surface 4, as shown in FIG.

A plate-shaped part 11 is formed projecting on the vertical side surfaces 4, 1, the contour of which is defined by a side surface 12, 13 running in the vertical direction and a side surface 1 connecting these sides in the area of the upper edge 6 of the housing 1.
4.

The plate-shaped part 11 has an isosceles trapezoidal contour and its shorter sides running parallel to its longitudinal direction are formed by side surfaces 14 . The side surface 14 is horizontal within the upper housing surface 7;
and extends parallel to the opposite longer side surface 15 on the stepped side surface 4.2. The angle of inclination α of the side surfaces 12 and 13 connecting the two side surfaces 14 and 15 is in the range of 2'' to 10'', preferably 2'' to 4''. The transitions of the ends of the side surfaces 14 to the side surfaces 12.degree. 13 have a slightly arched shape. Plate-shaped part 1
The tapered contour of 1 can also be formed, for example, by two side surfaces 12, 13 extending vertically and parallel to each other and a side surface 14 connecting these two sides in an arched manner.

In the embodiment according to FIG. 2, the depth of the horizontal side surface 4.2 and the thickness of the plate 11 are such that a step-like transition is formed from the outer surface 30 of the plate 11 to the wide side 4. are coordinated with each other.

From each side edge of outer surface 30, side surface 12. 13. 14 extends sloping inwards to the rearward vertical side 4.1, forming a tab tail.

A cavity 16 is formed in the plate-like part 11, and this cavity 1
A locking element 17 is pivotably supported in 6 .

This locking element 17 is provided with a locking protrusion 19 that protrudes from the outer surface 30 of the plate-like portion 11 .

FIG. 3 shows a partial sectional view through the housing 1 and the attached shaving head 2. FIG. shaving head 2
has two sides 1lfIli 20, 21 (see FIG. 1) and a wide surface 22.5 connecting these two sides 1fi 20.21 to each other. Lower side of side 20°21 and wide side 2
2 lies on a horizontal plane E, while the wide side 5 extends vertically downwards (in the direction of the arrow) from this horizontal plane E, so that the shaving head 2 has a stepped cross-sectional shape (
(See also Figure 6).

A recess 23 matching the shape of the plate-like portion 11 is formed in the wide surface 5 . As a result, the recess 23 likewise has a tabtail shape, due to which the side surfaces 31.32
．． 33 as well as the inner surface 24 (see FIG. 7). In the recess 23, on the inner surface 24 facing the outer surface 30, a recess 25 is provided as a fastening element for the locking projection 19 of the locking element 17 (see FIG. 3).

When the shaving head 2 is inserted and integrated onto the housing 1, the lower side of the side surfaces 20.21 and the lower side of the wide side 22 rest on the upper housing surface 7. The wide surface 5 grips the tab tail of the plate-shaped portion 11 by means of a tab tail groove provided in the recess 23 thereof. This interlocking tab tail mechanism ensures that the shaving head 2 seats securely on the housing 1. In order to lock the shaving head 2 onto the housing 1, a locking element 17 is used which is swingably supported in the cavity 16 and is biased by a compression spring 24, the locking element 1
A recess 2 in which a lock protrusion 19 of 7 is provided in the side surface 24.
Locking is achieved by engagement within 5.

In FIG. 4, the upper housing surface 7 is the side surface 27.28
Furthermore, the wide surface 29 facing the plate-like portion 11 is stepped. When the shaving head 2 is installed on the housing 1, the walls of the side surfaces 20.21 and the wide side 22 are supported on stepped sections, which on the one hand further improves the seating of the shaving head 2, and on the other hand the shaving head 2 The interior 34 of the is sealed from the outside.

Other individual parts of the embodiment of FIG. 4 will be explained in more detail with reference to FIG.

In FIG. 5, the upper part of the housing 1, which has a plate-shaped part 11 extending from the vertical side surfaces 4, 1, is shown on the outer surface 3.
0 removed, the cavity 16 molded into the plate-like part 11 can be seen with the locking element arranged within this cavity 16.

A through hole 35.36 is provided in each of the vertically extending side surfaces 12.13 of the plate-shaped part, and these through holes 35.3
A locking element 37, 38 is slidably supported in each case 6. Spring 3 biasing locking element 37, 38
9, the double-ended locking elements 37.38 project from the side surfaces 12.13 of the plate 11 with their roof-shaped locking projections 40.41.

FIG. 6 shows a cross section of a stepped shaving head 2, in which a recess 23 is provided in the wide surface 5 depending from the lower side E of the head. It is provided with an insertion hole accessible from the side 42.

Its upper side surface 33 and vertical inner surface 24 extend at an acute angle to each other and form a tab tail. At the lower end of the side surface 32 within the wide surface 5, there is a lock protrusion 40 shown in FIG.
A recess 44 is attached for engaging the.

FIG. 7 shows a front view of the shaving head of FIG. 6 as viewed in the direction of arrow B. FIG. The side surfaces 31, 32, 33 of the trapezoidal recess 23 formed in the wide surface 5 are connected to the inner surface 2 on the rear side.
4 to form an enclosed tabtail profile. On the side surfaces 31.32 there is a locking element 37. shown in FIG.
Recess 43.44 for lock projection 40.11 of 38
is provided. When the shaving head 2 is mounted on the housing 1, the upper housing surface 7 of the plate-shaped portion 11
The tapering profile in conjunction with the wide insertion hole of the recess 23 present in the lower part 42 of the head ensures a problem-free assembly and insertion of the provided tab tail. During the insertion movement between the housing 1 and the shaving head 2, the locking elements 17 and 37.
38 is a recess 25 provided in the inner surface 24 or a recess 43 provided in the side surface 31, 32 by the action of the spring 26°39.
44, the head 2 moves the locking elements 17 to 37, 38 into the interior of the cavity 16 against the pressure of the respective springs 26 to 39. When the housing 1 and the shaving head 2 are locked, the plate-shaped portion 1
1 and the recess 23 facing each other in a form-locking state, thereby forming a so-called close contact seat. The force of the springs 26, 39 acting on each locking element is such that the locking of the shaving head 2 onto the housing acts in the manner of a bayonet-pull-actuated connection, i.e. the locked shaving head 2 is always in the direction opposite to arrow A. The size is such that it can be unlocked and removed by a tension applied to it.

[Brief explanation of drawings]

FIG. 1 is a front view of a shaver with a shaving head mounted on the housing, FIG. 2 is a perspective view of the upper part of the housing with a locking element swingably supported on a plate, and FIG. 4 is a cross-sectional view of the upper part of the housing and the shaving head attached thereto; FIG. 4 is a perspective view of the upper part of the housing of a dry shaver having a plate portion provided on the wide side; FIG. FIG. 6 is a cross-sectional view of a shaving head with a stepped configuration having a tab tail in a wide surface; FIG. 7 is a front view of the shaving head; . 1...Housing, 2...Shaving head, 4
．． 29... Side surface of the housing, 5... Side surface of the shaving head, 7... Upper housing surface, 11...
Shaving head plate, 12.13° 14.15
...Side surface of the plate-like part, 16... Vacancy of the plate-like part, 17.
18.38.39...Lock element, 19...Lock protrusion, 23...Shaving head recess, 24,
31, 32, 33...Side surface of the recess.

Claims (1)

Claims: 1. A dry shaver having a housing (1) and a shaving head (2) removably held in the housing (1) via at least one resilient locking element (17), comprising: Side surface (4,
29) is provided with a plate-like part (11) having a tapered profile towards the upper housing surface (7), and a side face (5) opposite to the plate-like part (11) of the shaving head (2). ) is provided with a recess (23) corresponding to the contour of the plate-like part (11), and side surfaces (12, 13; 31, 32) extending in the perpendicular direction of the plate-like part (11) and the recess (23). are connected to each other via tab tails, and within the plate (11) there is at least one locking element (17, 38, 3
9) is elastically supported. 2. The plate (11) and the recess (23) have an isosceles trapezoidal profile, and the shorter side (14) of the unequal length sides (14, 15) is connected to the upper housing surface ( 7) The dry shaver according to claim 1, wherein the dry shaver is provided within the range of 7). 3. The outlines of the plate-shaped portion (11) and the recess (23) are formed by two side surfaces (12, 13; 31, 3) extending parallel to each other.
2) and one side surface (14, 33) formed in an arch shape that connects these two side surfaces, respectively. 4. Side (14) connecting side (12, 13; 31, 32)
, 33) are tab tail parts. 5. The housing (1) is formed stepwise from the upper housing surface (7) to the wide surface (4), and has a plate-like part (
11) according to any one of claims 1 to 4, characterized in that the vertical flanks (4, 1) terminate on horizontal stepped flanks (4, 2). dry shaver. 6. The shaving head (2) is stepped and has a wide surface (5) protruding from the lower surface (E) of the shaving head.
5. A dry shaver according to claim 1, further comprising a recess (23) in which a hole (23) faces toward the plate (11). 7. A cavity (16) is provided in the plate-shaped part (11), and a locking element (17) having a lock protrusion (19) protruding from the cavity (16) is provided in the cavity (16) with elasticity. The dry shaver according to any one of claims 1 to 5, characterized in that the dry shaver is supported by the shaver. 8. Claims 1 to 6 characterized in that the inner surface (24) of the wide surface (5) of the recess (23) is provided with a recess (25) as an engaging element for the locking projection (19). A dry shaver according to any one of the above. 9. The plate-shaped portion (11) includes a cavity (16) and at least one through hole (35, 36) extending from the cavity (16) to the tab tail, and the through hole (35, 36) has a hole inside the tab tail. A protruding locking element (37, 38) is slidably supported, the locking element (37, 38)
A spring (39) is arranged in the cavity (16) to bias the
The tab tail of the shaving head (2) has recesses (43, 4) as engagement elements for the locking elements (37, 38).
7. The dry shaver according to claim 1, further comprising: 4). 10. The plate-shaped part (11) includes a cavity (16) and two through holes (35, 36) extending from the cavity (16) to the tab tail, and each through hole (35, 36) has a hole in the tab tail. The protruding locking elements (37, 38) are slidably supported and a spring (3) biasing the locking elements (37, 38).
9) is arranged in the cavity (16) and the tab tail of the shaving head (2) is provided with two recesses (43, 44) as engagement elements for the locking elements (37, 38). A dry shaver according to any one of claims 1 to 6. 11. The upper housing surface (7) is formed flat and the shaving head (2)
Dry shaver according to any one of the preceding claims, characterized in that the at least three sides (20, 21, 22) of the dry shaver rest on the upper housing surface (7). 12. According to any one of claims 1 to 11, characterized in that the side edges of the upper housing surface (7) and the side edges of the shaving head (2) are formed so as to overlap in a stepped manner. dry shaver.