MXPA96000128A - Afei machine head - Google Patents

Abstract

The invention relates to a razor head for the pivoting attachment of a razor blade unit to a curved plate support, which are arranged on the free ends of two movable arms, located opposite one another, from a fork support for the razor blade unit and with complementary surfaces with curved shape on the underside of the razor blade unit on which they are correspondingly pivoting, whereby a mobile core, constrained by a spring, is guided between the two arms to retain the disengagement movement in the stop position during the attachment of the razor blade unit

Description

HEAD FOR SHAVING AQUINILLA The invention relates to a razor head for the pivoting fastening of a razor blade unit on a curved plate support, which are disposed on the free ends of two movable arms, located opposite, one to the other, a fork support for the razor blade unit and with complementary surfaces with a curved shape on the underside of the razor blade unit on which they are correspondingly pivoted, so that a mobile core, forced by a spring, it is guided between the two arms to retain the separation movement in the stop position during the attachment of the razor blade unit. During the use of wet razors, a single blade or a double razor blade system are permanently embedded in a plastic housing, which can be fixed to the handle by means of a holding device. Such razor blade units, on the one hand, and the mechanism fixed to the handle for the installation, retention and release of the razor blades of the handle constitute the razor head. What is currently considered is to provide a retention device that allows pivotal movement of the razor blade unit during shaving, so that the razor blade unit can follow the contour of the shaving surface in an optimal position for shaving. From US Pat. No. 3935639 a safety razor is known, in which the pivoting capacity of the razor blade unit on the handle is ensured by means of the retention device of the razor blade unit on the handle, described as Curved plate support. The curved plate support is constituted by support segments in the form of a curved plate on the handle which work together with corresponding segments formed as semi-cylindrical on the shaving blade unit and which allow the razor blade unit to pivot on the geometric axis of the handle (an axis parallel to the edges of the razor blades). By means of a leaf spring, disposed between the handle and the razor blade unit, the restoring force, in the direction of the resting position of the pivotal movement of the razor blade unit, is provided from above. and from below. The pivotal movement is limited as a whole by this device to a margin comprised between 20 and 90 degrees. A similar curved plate support is described in US Patent 3938247. Improved pivotal movement is known in response to forces exerted during shaving that is achieved by a curved plate support of a razor head, as described in US Pat. European Patent Application Number 0 291 030 Al. According to this document, the curved plate support for the razor blade unit is formed on the free ends of two opposed, movable arms, which comprise a forked retainer on the handle of the razor and working with complementary surfaces with curved shape on the underside of the razor blade unit to allow the respective pivotal movement. A movable core, forced by spring, is disposed in the handle between the two arms, which keeps the razor blade unit in the rest position. The forward end of the mobile core operates together with a roof-shaped cam on the razor blade unit to return the pivotal movement to the rest position. In the portion of the curved plate regions of the curved plate supports of the arms themselves, lowered hooks are formed in which the projections of the razor blade unit engage to ensure correct positioning on the handle to limit pivotal movement. The object of the present invention is to provide a simple curved plate support for a wet razor head with a retention and release mechanism., functional and perfected, easy to manufacture, designed to install, retain and release a unit of razor blades. The invention resolves, therefore, the problems of the heads of razors of technology prior to this invention, previously mentioned, thanks to two arms that are mutually parallel and movable toward each other against the forces of a spring device that they are disposed in a housing of the handle, the housing of which is essentially rectangular in shape, with both arms being provided with corresponding retaining elements, which are mutually retained as a preparation for the placement of a shaving blade unit and are joined together. to the arms, in a removable manner, when the arms are moved relative to one another, and the razor blade unit is fixed to the curved plate supports by means of the movable core under the action of the blade unit. shave during your placement. The arms of the forked retaining device are preferably fixed articulating arms which are movable with respect to the housing against the force of a spring disposed therebetween, or the arms constitute parts of a molded plastic element in a single piece in shape of U that are elastically movable one with respect to the other. According to a preferred embodiment of the invention, the retaining mechanism is formed in the manner of retaining fingers disposed one in the direction of the other and spaced apart, with retaining parts that engage each other in the closed position, which can be released by medium of the action of the mobile core either directly or indirectly. For example, a retaining finger of the retention mechanism can be formed in a flexible manner or fixed as an articulation arm to the arm of the fork retention device so that it can be released by means of the moving core acting on it. Preferably an elongated groove is formed in each of the retaining fingers and a retaining element in the form of a leaf spring, provided with an elongated projection corresponding to the elongated groove, is placed above the elongated groove of the retaining finger. which, by solicitation and at that moment, engages in the elongated groove of the finger, when both fingers are mutually in the coaxial position (the rest position). The retaining projection of the planar retaining element continues in a transverse projection near the mobile core, acting in conjunction with the retention projection constituted in the movable core. According to a preferred embodiment of the invention, the housing comprises, on its front side, an opening through which the movable core passes.; two openings on each side that are mutually opposite so that the operating arms of the arms pass through, and stop projections for a base plate, which carries the arms with the curved plate support segments and the retaining mechanism and the mobile core requested by spring, as a pre-assembled component. Therefore, it is proposed that the base plate be provided with two transverse wings on each side for the articulation of the arms, as well as a retention fit for the retention element of the sheet spring type, in addition to side walls in the longitudinal direction in which corresponding recesses are formed for the fingers of the retention mechanism, as well as a transverse recess for a coil spring and in which device a transverse connector of the side walls carries a stop support for the spring of the movable core. In addition, an elongated guide for the movable core can be conveniently disposed from opposite guide grooves, into which guide strips fit on each side of the movable core. By this means a preassembled component is provided as a complete module in which the integral support of the razor head for the razor blade unit is constituted. This component allows, by its very nature, to place it and fix it in the housing from above in a single operation in a technically simple definitive manner. Other embodiments, features and advantages of the object of the invention are represented in the following description and in the accompanying drawings of a preferred embodiment of razor head according to the invention. Figure 1 shows a plan view of a razor handle with an open housing of the head of the razor. Figure 2 shows a side view of the handle with the head of the razor of Figure 1. Figure 3 shows a rear view of the handle with the head of the razor of Figure 1. Figure 4 shows a base plate (frame) in a plan view to present all the elements of the head of the razor. Figure 5 shows the frame in a side view. Figure 6 shows the frame, split in half, in a rear view. Figure 7 shows a moving core in a plan view, a side view and a rear view. Figure 8 shows the articulation arms of the fork retention mechanisms with curved plate supports in an external view, a plan view and an interior view. Figure 9 shows the right arm of the fork retention mechanism in corresponding views. Figure 10 shows an alternative embodiment of the fork retention mechanism, with the retention mechanism in perspective. Figure 11 shows a third embodiment of the fork retention mechanism, with the retention mechanism in perspective; and Figure 12 shows a retention element of the sheet spring type in a view taken from below, a side view and a plan view. A wet razor essentially comprises a handle and a razor blade unit attached thereto. The razor blade unit is not illustrated in the drawings. It can be considered as a unit of the known state of the art and only has to be provided with a curved plate supports acting in conjunction with the handle, as will be described in more detail below. Figure 1 of the drawings shows a handle 1 with a housing 2 of a razor head, formed therein, from which housing the cover has been removed in the drawings so that the internal construction can be seen. Therefore, the housing is represented in rectangular form comprising a base plate 3, side walls 4, 5 and an upper opening 6 on the front side, through which the retaining means are freely directed outwards, which maintain the unit of razor blades in the integral assembled state. Two rectangular projections 7, 8 and a cylindrical retention projection 9 are formed in a single piece and are formed in a formation of three corners, on the base plate, and constituting the frame as illustrated in Figure 4.

The opening of the front side 6 is subdivided into a semicircular central section constituting the receiving opening 10 for the movable core illustrated in Figure 7 to pass, as well as open regions 11, 12 to allow the passage of the two arms of the vehicle. fork retention device with the structural supports for the razor blade units (not shown). In addition, in the housing, two lateral openings 13, 14 are formed that are mutually opposite, through which the activation buttons of the arms are projected in the assembled state and which can be operated by the user of the razor. to release or place the razor blade unit. In Figure 2 of the drawings it will be further seen that the razor head housing is formed with a curved configuration in order to keep the razor blade unit in a favorable position. The base plate or frame 15, illustrated in Figure 4 of the drawings, comprises an essentially rectangular body with two wings 16, 17 mutually opposite each side and side walls 18, 19, which form a space 22 for receiving the movable core , requested by spring, illustrated in Figure 7 of the drawings. For this purpose, the side walls 18, 19 are provided with internal guide grooves 20, 22 in which guide strips 24, 25 projecting longitudinally on each side of the movable core 23 are housed. Positioning openings 26 are also formed. , 27, separated one from another, and coaxial transverse recesses 28, 29, in the side walls 18, 19 of the frame 15, in which other parts of the curved plate support, as will be described later, are arranged and guided. Finally, the two side walls 18, 19 are connected to each other by means of a transverse connector at half height 30 on which a stop bracket 31 for a coil spring of the movable core 23 (not shown) is formed. In the two wings 16, 17 recesses 32, 33 are formed to form a joint for rotary movement of the arms of the curved plate support, illustrated in Figures 8 and 9, where the pivots 34, 35 are shown emerging from them. In addition, the frame 15 carries a latching catch 36 for the retention element 37, of the sheet spring type, illustrated in Figure 12. The mobile core 23, illustrated in Figure 7, comprises a movable core button 38, of rectangular cross section, which acts together with the cam surface of the shaving blade unit, not shown. The movable core button 38 is formed into a cylindrical connecting piece 39 which is formed in a rectangular hollow cross-section body 40, on each side of which the two guide strips 24, 25 are formed. A coil spring is disposed in the interior of the hollow body 40, separated between the lower stop bracket 31 of the frame 15 and the upper stop bracket 41 of the movable core. To place a unit of razor blades in the shell support, the movable core moves downwardly against the action of the coil spring; the two cams 42, 43 release the retention of the arms of the curved plate supports, as will be described in more detail below, together with the retention element of the sheet spring type 37, which is illustrated in the Figure 12. Figure 8 shows, in several views, the articulation arm 44 of a curved plate support, with pivots 34 formed at its lower end which are pivotally located in the recesses 32 of the wings 16 of the frame 15 in the assembled state . Approximately in the middle region, the arm 44 comprises an actuating button 45, which protrudes from the housing through the side opening 13 and which allows the user to pivot the arm 44 inwards. The arm 444 protrudes from the housing thanks to the open region 11, so that the segments 46, of the curved plate support, formed at their free ends, may constitute a curved plate support for engagement with the razor blade unit. The supporting surface 47 of the support segment 46 is a completely uniform surface without recesses or protrusions and comprises a ring extension with an outward-pointing semicircular shape, which is coupled behind a corresponding hook-shaped projection on the knife unit razor that grasps and holds the razor blade unit in the shaving position. In this way, the pivotal movement capability of the razor blade unit in the curved plate support is ensured. Approximately at the height of the operating button 45, a retaining finger 49, directed inwards, is formed on the arm 44, at an angle slightly greater than a right angle and with slight upward inclination, due to the pivotal movement of the arms. arms 8. In the region of its free end there is an elongated groove 50, which is a holding mechanism for retaining the two arms of the curved plate support at the distance necessary for pivotal movement with respect to each other. To this end, the right arm 51 of the curved plate support illustrated in Figure 9 is an identical mirror image of the arm 44 already described and comprises a detent finger 52, directed inwardly, with an elongated groove 53. In the position The two elongated grooves 50 and 53 are disposed coaxially with respect to each other and are coupled, by means of their own tension, to a corresponding elongated projection 54 of the retention element 37 of the sheet spring type which retains the arms 37. The retention element 37, of the sheet spring type, is fixed to the retention recess 36 of the frame 15 by means of a fixing device 55, for example by means of adhesive, and extends in the region between the two side walls 18, 19 of the frame 15 below the transverse recess 28, 29 in which, in the assembled state, a transverse helical spring is placed between the arms 44 and 45 and the extensions of stop 56 and 57. The curved region 58, corresponding to this region 38, of the retaining element 37, which constitutes an interlock, comprises an essentially "T" -shaped projection comprising, on the one hand, an elongated projection 54 and, on the other hand, a transverse projection 59. The elongated projection 54 acts, as already described, with the elongated grooves 50, 53 to hold them together, while the transverse projection 59 acts immediately on the retention of the cams of the mobile core 42. , 43 if the mobile core 23 makes contact during the placement of a razor blade unit. Under the action of the heli-coidal spring directed transversely between the arms 44 and 51, these arms 44 and 51 move outwards, whereby the circular extensions 48, 48 'of the support segments 46, 46' of the arms are they engage below the corresponding retention means of the razor blade unit and thus fix it to the head of the razor. Figure 10 and Figure 11 show alternative embodiments of a retention mechanism in which, during retention, the moving core acts directly on a flexible finger, which acts correspondingly on a pivoting finger, Figure 11, and whose fingers are provided with retention heels 60, 61 in the forward region. To place a razor blade unit, the user of the razor drives the two side drive buttons 45, 45 'of the arms 44, 51 of the razor head and pivots them inwardly around the articulation pivots. - part 34, 35 against the action of the coil spring, not shown, which is located between the stop extensions 56 and 57. By this action, the fingers 49, 52 rotate towards each other in the space between the side walls 18, 19 of the frame 15 until its elongated grooves 50, 53 are mutually aligned. The retention of the arms is then produced, because the elongated projection 54 of the retention element of the leaf spring type 37 engages with tension in the two elongated grooves 50, 53, thus retaining. The support segments 46, 46 'of the curved plate support are now located in the region of the movable core 23 and arranged for the positioning of a shaving blade unit. The arms 44, 51 automatically recover their initial initial position when pressure is applied to the movable core 23. This operation is performed when the corresponding camming surfaces of the razor blade unit cooperate with the head of the razor. The movable core 23 is pressed downwardly against the action of a coil spring by means of its guide strips 24, 25 which engage in the guide grooves 20, 21 of the frame and a retention with its cams 42, 43 occurs. by raising the transverse projection 59 of the retaining element 37, whereby the force of the coil spring between the arms 44 and 51 causes them to back outwards. Then, thanks to the circular extensions 48, 48 ', below the corresponding hooks of the razor blade unit, this razor blade unit is attached to the head of the razor. Again the pivotal movement capability of the razor blade unit in the support segment 46, 46 'is thus guaranteed. To remove the razor blade unit, it is only necessary for the user to press the actuating buttons 45, 45 'and thus pivot the arms inwards, so that the curved plate support, for a side, leave the used razor blade unit free and, on the other hand, be ready for use with the next new razor blade unit. List of References 1. Handle 2. Housing 3. Base plate 4. Side wall 5. Side wall 6. Front end opening 7. Retention projection 8. Retention projection 9. Retention projection 10. Housing opening 11. Open area 5 12. Open area 13. Lateral opening 14. Lateral opening 15. Frame 16. Fin 10 17. Fin 18. Side wall 19. Side wall 20. Guide groove 21. Guide groove 15 22. Space 23. Core mobile 24. Guide rail 25. Guide rail 26. Opening 20 27. Opening 28. Transverse recess 29. Transverse recess 30. Transverse connector 31. Stop support 25 32. Hole 33. Hole 34. Pivot 35. Pivot 36. Inlay 5 37. Retaining element 38. Moving core head 39. Connection piece 40. Hollow body 41. Stop bracket 10 42. Cam 43. Cam 44. Arm 45. Actuation button 45 'Actuation button 46. Support segment 46 'Support segment 47. Support surface 47' Support surface 48. Circular extension 20 48 'Circular extension 49. Retaining finger 50. Extended elongation 51. Arm 52. Retaining finger 25 53. Elongated groove 54. Elongated projection 55. Fastening means 56. Stop extension 57. Stop extension 58. Curved region 59. Transverse projection 60. Retaining heel 61. Retaining heel fifteen twenty

Claims (9)

1. CLAIMS 1.- Wet razor head for pivotally retaining a unit of razor blades in a curved plate support that is disposed on the free ends of two arms, movable with respect to each other, of a retention mechanism in fork for the razor blade unit and with complementary surfaces with curved shape on the underside of the razor blade unit on which they are correspondingly pivoting, whereby a mobile core, urged by spring, is guided between the two arms to allow movement of the arms outwards in the holding position during the positioning of the razor blade unit, characterized in that the two arms (44, 51) are arranged mutually parallel and movable with respect to each other against the action of a spring device, in an essentially rectangular housing (2) of the handle (1), and because corresponding retention elements (acanaladu) elongate strips 50, 53, elongated projection 54) that can be held together during preparations for the placement of a razor blade unit and are attached, removably, to the arms (44, 51), when the arms (44, 51) move relative to each other and by means of the movable core, by action of the razor blade unit, during its positioning, the razor blade unit is fixed to the curved plate supports (46, 46 ').
2. 2. Razor head according to clause 1, characterized in that the arms (44, 51) of the fork retention mechanism are fixed link arms (34, 35) which are movable with respect to the housing against the force of a spring disposed between them, or because the arms are parts of a plastic molded element of a single piece in the form of "U" that are mobile one with respect to the other.
3. 3. Razor head according to clause 1 and clause 2, characterized in that a coil spring is used as a spring device between the two arms (44, 51).
4. 4. Razor head according to any of clauses 1 to 3, characterized in that the retention mechanism is formed as retaining fingers (49, 52) disposed toward each other and spaced apart from one another, with retaining portions (50). , 53, 54) as well as 60, 61), which mutually engage in the closed position, which can be released by action of the mobile core (23) either directly or indirectly.
5. 5. Razor head according to clause 4, characterized in that an elongated groove (50, 53) is formed in each of the fingers as a holding mechanism and, disposed above the elongated groove (50, 53) of the finger of retainer, a retention element in the form of sheet spring (37) is provided with an elongated projection (54), corresponding to the elongated groove (54), which by solicitation and at that time is coupled into the elongated groove (50). , 53) of the retaining finger, when the fingers are in coaxial position with respect to each other (resting position).
6. 6. Razor head according to clause 5, characterized in that the retention projection (54) of the flat retaining element (37) continues in a transverse projection (59) close to the mobile core (23), acting in conjunction with the retention with the cams (42, 43) constituted in the mobile core.
7. 7. Razor head according to any of clauses 1 to 5, characterized in that the housing (2) comprises, on its front side, an opening (10) for the passage of the mobile core (23); two openings (13, 14) on each side, which are mutually opposite so that the operating buttons (45, 45 ') of the arms (44, 51) and stop projections (7, 8, 9) pass through for a base plate (15), which carries the arms (44, 51) with the curved plate support segments (46, 46 ') and the retaining mechanism and the spring-loaded movable core (23) as a component preassembled
8. 8. Razor head according to clause 7, characterized in that the base plate (15) is provided with two transverse wings (16, 17) on each side for the articulation of the arms (44, 51), as well as a retaining recess in the middle part for the element of retention of the type of leaf spring (37), as well as side walls (18, 19) in the longitudinal direction, where corresponding recesses (26, 27) are formed for the retention fingers (49, 52) of the retention mechanism as well as a transverse recess (28, 29) for the coil spring, and in that a transverse connector (30) of the side walls (18, 19) carries a stop support (31) for the spring of the movable core.
9. 9. A razor head according to clause 8, characterized in that an elongated guide for the movable core (23) is disposed on the side walls (18, 19) from opposite guide grooves (20, 21) in which they fit the guide strips (24, 25) on each side of the mobile core (23). The invention relates to a razor head for the pivoting attachment of a razor blade unit to a curved plate support, which are disposed on the free ends of two movable arms, located opposite to each other, of a fork support for the razor blade unit and with complementary surfaces with a curved shape on the underside of the razor blade unit on which they are correspondingly pivoting, whereby a mobile core, constrained by a spring, is guided between the two arms to retain the separation movement in the stop position during the attachment of the razor blade unit. = = = = = -. = = = -. = = = =. = = = -. = -. = - = -. = = =