Patent Publication Number: US-2021178617-A1

Title: Razor assembly

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application Ser. No. 16/197,049, filed on Nov. 20, 2018, which claims the benefit of earlier filing date and right of priority to Korean Patent Application Nos. 10-2017-0155834, filed on Nov. 21, 2017 and 10-2018-0097323, filed on Aug. 21, 2018, the contents of which are all hereby incorporated by reference herein in their entirety. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to a razor assembly. 
     BACKGROUND 
     The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. 
     Generally, conventional razor assemblies known as wet razors include a razor cartridge and a razor handle. A razor cartridge includes a blade housing, a guard bar, a cap, and at least one shaving blade disposed between the guard bar and the cap. 
     The razor cartridge is configured to pivot or rotate about a razor handle between a rest position and a rotational position. The rotational or pivotal motion of the razor cartridge is basically carried out around a parallel rotation axis (hereinafter “parallel axis”) that is parallel to the direction of the arrangement of the shaving blades. 
     Rotational motion about the parallel axis ensures an efficient shaving by providing a seamless contact between the shaving blades and the cutting surface, e.g., the user&#39;s skin. 
     Recently, in addition to a rotating function centered on the parallel axis, a multi-axis pivoting razor has been developed, incorporating therein a rotating function centered on a perpendicular rotation axis (hereinafter, “perpendicular axis”) that is perpendicular to the parallel axis. 
     The multi-axis rotational razor is configured such that a razor cartridge is rotatable about two or more axes, allowing the shaving blade to move along the profile of the user&#39;s skin, promoting a smoother contact therebetween. 
     However, the multi-axis rotating razor may have somewhat complicated rotational structure for providing a rotating function about two axes or more, resulting in somewhat vulnerable rotational structure. 
     Therefore, a simple but reliable new rotational structure capable of providing a multi-axis rotational function is desired. 
     SUMMARY 
     In accordance with some embodiments, a razor assembly includes a razor cartridge, a connecting head, a razor handle and a restoring force provider. The razor cartridge includes at least one shaving blade having a cutting edge, and a blade housing configured to house at least one shaving blade in a transverse direction. The connecting head has one side configured to be detachably coupled with the razor cartridge. The razor handle includes a head adapter coupled with the connecting head to be rotatable about a rotational axis extending perpendicular to a transverse direction, and a grip extending from the head adapter. The restoring force provider includes one or more rotatable or rotary magnets disposed on another side of the connecting head and configured to co-rotate with the connecting head about the rotational axis, and one or more fixed magnets coupled to the razor handle and arranged such that a magnetic force is generated between the rotary magnet and the fixed magnet. 
     The rotary magnet and the fixed magnet are configured to be responsive to rotation of the connecting head about the rotational axis from the rest position, providing a restoring force for returning the connecting head to the rest position. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a plan view of a razor assembly according to a first embodiment as viewed from the front of a razor handle. 
         FIG. 2  is a rear view of the razor assembly according to the first embodiment of the present disclosure. 
         FIG. 3  is a rear perspective view of the razor assembly according to the first embodiment of the present disclosure. 
         FIG. 4  shows a mode in which a blade housing and a head-side connecting member are coupled according to the first embodiment of the present disclosure. 
         FIG. 5  is an exploded perspective view of a razor assembly according to the first embodiment of the present disclosure. 
         FIG. 6  is a perspective view of the razor assembly with a longitudinal portion of the razor handle removed according to the first embodiment of the present disclosure. 
         FIG. 7  is a cross-sectional view showing the shape of a razor assembly with a connecting head being in the rest position according to the first embodiment of the present disclosure. 
         FIG. 8  is a plan view showing the shape of the razor assembly when the connecting head is in a rotated position according to the first embodiment of the present disclosure. 
         FIG. 9  is a cross sectional view showing the shape of a razor assembly with a connecting head being in a rest position according to the second embodiment of the present disclosure. 
         FIG. 10  shows lines of magnetic force acting between a rotatable magnet or rotary magnet and a fixed magnet according to the second embodiment of the present disclosure. 
         FIG. 11  is a perspective cross-sectional view of a pivot space of a connecting head and a rotary magnet accommodated therein according to the second embodiment of the present disclosure. 
         FIG. 12  is a perspective view of the magnet housing and a fixed magnet housing therein according to the second embodiment of the present disclosure. 
         FIG. 13A  is a plan view of a razor assembly according to a third embodiment of the present disclosure as seen from the front of the razor handle,  FIG. 13B  is a rear view of the razor assembly shown in  FIG. 13A , and  FIG. 13C  is a rear perspective view of the razor assembly shown in  FIGS. 13A and 13B . 
         FIG. 14  is an exploded perspective view of the razor assembly of  FIG. 13A . 
         FIG. 15  is a plan view showing the shape of the razor assembly with a connecting head being in the rotated position. 
         FIG. 16A  is a plan view of a razor assembly according to a fourth embodiment of the present disclosure as viewed from the front of the razor handle,  FIG. 16B  is a rear view of the razor assembly shown in  FIG. 16A , and  FIG. 16C  is a rear perspective view of the razor assembly shown in  FIGS. 16A and 16B . 
         FIGS. 17A to 17C  are exploded perspective views of the razor assembly of  FIG. 16A  viewed from different directions. 
         FIG. 18  is a perspective view of a razor assembly in which a longitudinal part of a second receiving member is removed. 
         FIG. 19A  is a plan view showing the shape of the razor assembly of  FIG. 18  when the connecting head is in the rest position and  FIG. 19B  is a plan view showing the shape of the razor assembly of  FIG. 18  when the connecting head is in the rotated position. 
         FIG. 20  is a rear perspective view of a razor assembly according to a fifth embodiment of the present disclosure. 
         FIG. 21A  and  FIG. 21B  are exploded perspective views of the razor assembly of  FIG. 20  viewed from different directions. 
         FIGS. 22A through 22C  are plan and perspective views of laterally cut first and second receiving members of a razor assembly. 
         FIG. 23A  is a plan view of the shape of a razor assembly with a connecting head being in the rest position and  FIG. 23B  is a plan view showing the shape of the razor assembly when the connecting head is in the rotated position. 
         FIG. 24  shows an arrangement of three magnets for providing the repulsive force between adjacent magnets. 
         FIG. 25A  is a plan view of a razor assembly according to a sixth embodiment of the present disclosure as viewed from the front of a blade housing,  FIG. 25B  is a rear view of the razor assembly shown in  FIG. 25A , and  FIG. 25  C is a rear perspective view of the razor assembly shown in  FIGS. 25A and 25C . 
         FIG. 26  is an exploded perspective view of the razor assembly of  FIG. 25A . 
         FIG. 27A  is a plan view showing the shape of the razor assembly with a connecting head being in the rest position and  FIG. 27B  is a plan view showing the shape of the razor assembly when the connecting head is in the rotated position. 
         FIG. 28  is a perspective view of a razor assembly according to a seventh embodiment of the present disclosure, as viewed from one side of the rear of a blade housing. 
         FIG. 29A  is an exploded perspective view of the razor assembly of  FIG. 28  and  FIG. 29B  is a plan view of an exploded perspective view of the razor assembly of  FIG. 29A  as viewed from the rear. 
         FIG. 30A  and  FIG. 30B  are perspective and plan views showing the shape of the razor assembly with a connecting head being in a rest position and  FIG. 30C  is a plan view showing the shape of the razor assembly when the connecting head is in the rotated position. 
         FIG. 31  is an exploded rear perspective view of a razor assembly according to an eighth embodiment of the present disclosure, as viewed from one side of a blade housing. 
         FIG. 32A  and  FIG. 32B  are perspective and plan views showing the shape of the razor assembly with a connecting head being in a rest position and  FIG. 32C  is a plan view showing the shape of the razor assembly when the connecting head is in the rotated position. 
         FIG. 33  shows a stopper of the razor assembly according to the eighth embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     At least one embodiment of the present disclosure seeks to provide a razor assembly capable of providing a rotational movement about the rotation axis perpendicular to the axis parallel to the arrangement direction of the shaving blades. 
     The present disclosure also seeks to provide a razor assembly which has a simpler structure for generating the rotational movement about the rotation axis, and does not deform even after a prolonged use. 
     The technical problems addressed by the present disclosure are not limited to those mentioned above and other unmentioned technical problems may be clearly understood by those skilled in the art from the description below. 
     Hereinafter, some embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In the following description, like reference numerals designate like elements, although the elements are shown in different drawings. Further, in the following description of some embodiments, a detailed description of known functions and configurations incorporated therein will be omitted for the purpose of clarity and for brevity. 
     Additionally, various terms such as first, second, A, B, (a), (b), etc., are used solely for the purpose of differentiating one component from the other, not to imply or suggest the substances, the order or sequence of the components. Throughout this specification, when a part “includes” or “comprises” a component, the part is meant to further include other components, not excluding thereof unless specifically stated to the contrary. 
       FIG. 1  is a plan view of a razor assembly  100  according to the first embodiment of the present disclosure as viewed from the front of a razor handle  30 . Here, the front of the razor handle  30  refers to the working surface of the blade housing  10 . 
     As shown in  FIG. 1 , the razor assembly  100  includes a razor cartridge  6 , a connecting head  20  and a razor handle  30 . 
     The razor cartridge  6  includes a blade housing  10 , a guard bar  1 , a lubricating band  3 , one or more shaving blades  5  and clips  7   a ,  7   b.    
     At one end of the shaving blade  5 , a cutting edge is formed to be used in cutting of the user&#39;s hair, and the other end of the shaving blade  5  is configured to be housed in a seat (not shown) formed in blade housing  10 . The at least one shaving blade  5  may also be accommodated in the seat of the blade housing  10 . 
     The shaving blade  5  is housed in the seat in the transverse direction d 1  perpendicular to the shaving direction. Here, the shaving direction means the direction in which the blade housing  10  moves along the skin of the user when the user shaves the hair with the razor assembly  100 . 
     The shaving blade  5  may be an integrated blade or a welded blade. 
     An integrated blade includes a base, a bend, and a cutting portion. In the integrated blade, the base, bend, and cutting portion are integrally formed. 
     The base is housed in the seat of the blade housing  10 , and the bend extends along a bent line from the base. One end of the cutting portion extends from the bend, and the other end of the cutting portion is provided with a cutting edge. 
     A welded blade includes a metal support and a cutting portion. In the welded blade, the metal support and the cutting portion are constructed as separate parts. 
     The metal support includes a base accommodated in the seat of the blade housing  10 , and a bend extending along a bent line from the base. One end of the cutting portion is welded to the bend, and the other end of the cutting portion is provided with a cutting edge. 
     The shaving blade  5  is generally an integrated blade or a welded blade, but the present disclosure is not limited thereto. For example, the shaving blade  5  may be straight blade that does not include a bent area. 
     The shaving blade  5  may be made of a material such as stainless steel, metal alloy or ceramic. 
     The clips  7   a ,  7   b  secure both ends of the cutting edge of the shaving blade  5  to the blade housing  10 . This can prevent the shaving blade  5  from being separated from the blade housing  10 . 
     The clips  7   a ,  7   b  are generally made of a metallic material such as aluminum, but the present disclosure is not limited thereto. For example, the clips  7   a ,  7   b  may be made of a material such as synthetic resin, synthetic fiber, or ceramic. 
     The clips  7   a ,  7   b  are configured to have their respective one edges inserted into a through hole (not shown) formed in the cartridge frame, and have their respective other ends surround the respective sides of the blade housing  10 , wrapping the cutting edge of the shaving blade  5 . 
     However, the method of fixing the shaving blade  5  via the clips  7   a ,  7   b  is not limited to this. For example, the clips  7   a ,  7   b  may have both of their edges configured so as to respectively surround both sides of the blade housing  10 , or have both of their edges penetrate through holes formed in the blade housing  10 , respectively. Further, no separate fixing members are required such as clips  7   a ,  7   b , and instead both side portions of the shaving blade  5  may be fixed by being clamped in fixing grooves (not shown) formed on the blade housing  10 , respectively. 
     The guard bar  1  is arranged on the underside of the blade housing  10  so that it can come into contact with the user&#39;s skin before the shaving blade  5  can when shaving. As a result, the guard bar  1  may pull the user&#39;s skin in the direction of shaving before the hair is cut by the shaving blade  5 . 
     By pulling the user&#39;s skin with the guard bar  1 , the user&#39;s hair can stand up in a direction perpendicular to the skin surface of the user, to facilitate cutting of the hair with the shaving blade  5 . 
     The guard bar  1  may be made of plastic or rubber, but is not limited thereto. For example, the guard bar  1  may have a form in which a rubber part is partially formed on a frame made of a plastic material. 
     Lubricating band  3  serves to smoothen the skin roughened by the cutting operation and to facilitate the glide of the razor assembly  100  by applying a lubricant material to the user&#39;s skin after cutting. 
     The lubricating band  3  may be made of a flexible material, a porous material having moisture absorption capability or a shaving aid. 
     The lubricating band  3  can expand when exposed to water, and can provide the user&#39;s skin with a water-soluble substance containing a lubricating component, a skin soothing component and the like. 
     Although the lubricating band  3  is illustrated as being disposed on the upper side of the blade housing  10 , the present disclosure is not limited thereto. For example, the lubricating band  3  may be located adjacent to the guard bar  1  on the lower side of the blade housing  10 , and may be placed on both the upper side and the lower side of the blade housing  10 . 
     The razor handle  30  includes a head adapter  32  and a grip  33 . 
     The head adapter  32  is a region connected to the connecting head  20  on the razor handle  30 . The head adapter  32  has a housing space (E in  FIG. 5 ) for accommodating the connecting head  20 . 
     The grip  33  is an area that the user can grasp on the razor handle  30 . The grip  33  extends from the head adapter  32 . 
     Although the razor handle  30  may be formed as one body, it is not so limited. For example, the razor handle  30  may be formed of multiple longitudinal splits. 
     The connecting head  20  is configured to be received in the head adapter  32 , and to be rotatable about the second axis ax 2 . 
       FIG. 2  is a rear view of the razor assembly  100  according to the first embodiment of the present disclosure, as viewed from the rear of the razor handle  30 . 
     As shown in  FIG. 2 , one end of the connecting head  20  is detachably coupled with the blade housing  10  on the backside of the blade housing  10 . 
     The blade housing  10  can rotate about the first axis ax 1  with respect to the one end of the connecting head  20 . The first axis ax 1  is substantially parallel to the transverse direction d 1  which is the orientation of the shaving blades  5 . 
       FIG. 3  is a rear perspective view of the razor assembly  100  according to the first embodiment of the present disclosure. 
     As shown in  FIG. 3 , the connecting head  20  is rotatably coupled to the head adapter  32  about the second axis ax 2 . 
     The second axis ax 2  is perpendicular to both the transverse direction d 1  and the longitudinal direction d 2 . Here, the longitudinal direction d 2  is defined to be perpendicular to both the direction of the second axis ax 2  and the transverse direction d 1 , when the connecting head  20  is in its rest position. 
     Although the longitudinal direction d 2  is illustrated as being parallel to the direction in which the grip  33  extends, the present disclosure is not limited thereto. In some embodiments, the grip  33  extends from the head adapter  32  to have a predetermined curvature for ease of use, in which case the second axis ax 2  is perpendicular to the transverse direction d 1 , but not to the direction in which the grip  33  extends. 
       FIG. 4  is a perspective view showing a mode in which the blade housing  10  and the head-side connecting member  21  are coupled according to the first embodiment of the present disclosure. 
     As shown in  FIG. 4 , the connecting head  20  includes a head-side connecting member  21 , and the razor cartridge  6  includes a housing-side connecting member  11 . 
     The head-side connecting member  21  is disposed at one end of the connecting head  20  and can rotate within a predetermined angular range about the first axis ax 1 . 
     The housing-side connecting member  11  is arranged on the back side of the blade housing  10 , and includes a coupling area F to which the head-side connecting member  21  may be coupled. 
     The housing-side connecting member  11  may be formed as a member separate from the blade housing  10 , where the housing-side connecting member  11  and the blade housing  10  may be fastened so that they do not move relative to each other. However, the present disclosure is not so limited, and the housing-side connecting member  11  and the blade housing  10  may be formed integrally. 
     The head-side connecting member  21  may be inserted into the coupling area F of the housing-side connecting member  11 , where the two members are coupled against mutual movement. Accordingly, the razor cartridge  6  is responsive to the rotation of the head-side connecting member  21  about the first axis ax 1 , for co-rotating with the housing-side connecting member  11  within a predetermined angular range. 
     However, the rotational structure of the razor cartridge  6  with the first axis ax 1  as the center is not limited thereto. 
     For example, the first axis ax 1  may be located on the razor cartridge  6  rather than the connecting head  20 . In this case, the housing-side connecting member  11  may be coupled to the blade housing  10  so as to be rotatable about the first axis ax 1 , and the head-side connecting member  21  may be immovably fixed to the head  20 . 
     In this case, the housing-side connecting member  11  can rotate, when coupled with the head-side connecting member  21 , about the first axis ax 1  with respect to the blade housing  10 , and thereby enables the razor cartridge  6  to rotate about the first axis ax 1  with respect to the handle  30 . 
     The head-side connecting member  21  is illustrated as being coupled to the housing-side connecting member  11  by inserting lateral protrusions formed on both sides of the head-side connecting member  21  in lateral openings (not shown) formed on both side walls of the coupling area F, but the present disclosure is not limited thereto. 
     For example, the coupling between the head-side connecting member  21  and the housing-side connecting member  11  may be achieved by fixedly inserting longitudinal protrusions protruding from the connecting head  20  in the longitudinal direction d 2 , in longitudinal openings formed on the coupling area F. 
       FIG. 5  is an exploded perspective view of the razor assembly  100  according to the first embodiment of the present disclosure. 
     As shown in  FIG. 5 , disposed coaxially with the second axis ax 2  is a fastening member  50  configured to penetrate all the way through holes  3241   a ,  3241   b  formed in the razor handle  30  and through holes  1221   a ,  1221   b  formed in the connecting head  20 . The connecting head  20  can pivot about the second axis ax 2 , when the fastening member  50  passes through the connecting head  20  and the razor handle  30 . 
     Although the fastening member  50  generally has a shape of a fixing pin, it is not limited thereto. For example, the fastening member  50  may also be a shaft-shaped member that allows for a rotational motion between the connecting head  20  and the razor handle  30 . 
     Although the shaft of the connecting head  20  is illustrated as being implemented by a dedicated shaft member such as the fastening member  50 , the present disclosure is not limited thereto. For example, the shaft of the connecting head  20  may be provided by a shaft-shaped member protruding from the head adapter  32 , passing through a through hole of the connecting head  20 . On the contrary, a shaft-shaped member protruding from the connecting head  20  may penetrate a through hole of the head adapter  32 . 
     The razor assembly  100  includes a rotary magnet or magnetic material  40  and a fixed magnet or magnetic material  45 . 
     The rotary magnet or magnetic material  40  and the fixed magnet or magnetic material  45  are configured to provide, when the connecting head  20  rotates about the second axis ax 2  from the neutral or rest position, a restoring force for returning the connecting head  20  to the rest position by utilizing attractive magnetic force acting between the rotary magnet or magnetic material  40  and the fixed magnet or magnetic material  45 . 
     The first embodiment of the present disclosure illustrates the attractive magnetic force acting between the rotary magnet  40  and the fixed magnet  45 , but another embodiment of the present disclosure utilizes repulsive magnetic force acting between the rotary magnet  40  and the fixed magnet  45 . 
     The rotary magnet  40  is housed in a pivot space G formed on the other side of the connecting head  20 . The rotary magnet  40  is responsive to a rotation of the connecting head  20  about the second axis ax 2 , for co-rotating with the connecting head  20  about the second axis ax 2 . 
     Although the pivot space G is illustrated as being formed on the connecting head  20 , the present disclosure is not limited thereto. For example, the pivot space G may be formed in a separate receiving member (not shown), wherein the rotary magnet  40  is received in the receiving member as well as mounted on the connecting head  20 . 
     In addition, the connecting head  20  is illustrated as being composed by two sections divided in the longitudinal direction d 2  to accommodate the rotary magnet  40  in the pivot space G, although the present disclosure is not limited thereto, and it can also be configured as a single unit. 
     The fixed magnet  45  is fixedly arranged on the razor handle  30 . Specifically, the fixed magnet  45  is arranged on the razor handle  30  such that when the connecting head  20  is in the rest position, it exerts an attractive force to the rotary magnet  40  in the longitudinal direction d 2  perpendicular to both the transverse direction d 1  and the direction of the second axis ax 2 . 
     The fixed magnet  45  is accommodated and fixed in a housing space H of the razor handle  30 . Specifically, the fixed magnet  45 , being accommodated in a magnet housing  49 , is detachably housed in the housing space H of the razor handle  30 . 
     The magnet housing  49  includes a magnet seat or magnet receiving portion  492  and a plug  494  extending from the magnet seat  492 . 
     The magnet receiving portion  492  is configured to accommodate the fixed magnet  45 . 
     With the magnet housing  49  being inserted in the housing space H, the plug  494  may be configured to depress both side walls of the housing space H, whereby fixing the magnet housing  49  within the housing space H. To this end, the plug  494  may be made of an elastic material such as plastic. 
     The plug  494  may include protrusions  4922  ( FIG. 7 ) extending from one end of the plug  494 . The protrusions  4922  may be configured, with the magnet housing  49  being inserted in the housing space H, to securely hook onto handle-side locking steps  35  ( FIG. 7 ) formed on both side walls of the housing space H. 
     The grip  33  may include a lid member  332 . 
     With the lid member  332  separated from the grip  33 , the magnet housing  49  may be inserted in or removed from the housing space H. This, in effect, facilitates replacement and maintenance of the fixed magnet  45 . 
     For example, the user can exchange for another fixed magnet having different magnetic force according to his/her preference, whereby the rotational strength of the connecting head  20  may be adjusted. 
     The method of adjusting the rotational strength of the connecting head  20  may include using fixed magnets  45  having different materials, changing the size and shape of the fixed magnet  45 , or adjusting the clearance between the rotary magnet  40  and the fixed magnet  45 . 
     To adjust the clearance between the rotary magnet  40  and the fixed magnet  45 , they may be configured to be movable within the razor assembly  100  in the longitudinal direction d 2 . 
     For example, the plug  494  of the magnet housing  49  may be configured to be selectively fitted and fixed to a plurality of handle-side locking steps  35  configured in multiple stages along the longitudinal direction d 2 . Alternatively, the housing space H may provide a rail member formed in the longitudinal direction d 2 , along which the magnet housing  49  slides. However, the present disclosure is not limited to these configurations. 
     The material forming the rotary magnet  40  and the fixed magnet  45  includes all the substances that cause attractive magnetic force to act between the rotary magnet  40  and the fixed magnet  45 . 
     Therefore, both the rotary magnet or magnetic material  40  and the fixed magnet or magnetic material  45  may be permanent magnets, which, however, is not a limitation. For example, in the first embodiment using attractive magnetic force, either one of the rotary magnet or magnetic material  40  and the fixed magnet or magnetic material  45  is a permanent magnet, and the other may be a magnetic metal. 
     Here, the magnetic metal means a substance to which an attractive magnetic force may be exerted by a permanent magnet. It is desirable but not necessary that ferromagnetic metal such as iron, cobalt and nickel be used as the magnetic metal. Therefore, a substance other than the above-mentioned metal may be used as the magnetic metal as long as it is a substance on which an attractive magnetic force acts by the permanent magnet. 
     In addition, the permanent magnets used for the rotary magnet  40  and the fixed magnet  45  may be replaced with an electromagnet that functions as a magnet only when a current flows. In this case, a battery capable of supplying an electric current to the electromagnet may be built in the connecting head  20  or the handle  30 . 
     Although the rotary magnet  40  and the fixed magnet  45  are illustrated as having a cylindrical shape, they are not limited thereto. For example, the rotary magnet  40  or the fixed magnet  45  may also have a spherical shape or other shapes. 
     The rotational structure using the magnetic force according to the first embodiment of the present disclosure is simpler and more reliable compared with the rotational structure employed by the conventional multiaxial rotational razor, for example, the rotational structure using the cantilever. 
     For example, in the conventional cantilever system, the cantilever is made of an elastic member such as a leaf spring in order to impart the restoring force to the cantilever. Prolonged use of these elastic members is susceptible to deformation or wear issues, resulting in degeneration of restoring force of the cantilever. On the contrary, the rotational structure using the magnetic force according to the first embodiment of the present disclosure has an advantage that a certain restoring force can be permanently provided even after long-term use. 
     In addition, the rotational structure using the magnetic force according to the first embodiment positively provides a smoother pivot over the conventional cantilever system, by using the magnetic force acting between the permanent magnets (or between the permanent magnet and the magnetic metal) as restoring force, rather than the elastic force of the elastic member. 
     Further, in the conventional cantilever method, the elastic member constituting the cantilever is responsible for the restoring force, making it difficult to adjust the magnitude of the restoring force according to the user&#39;s preference. On the contrary, the rotational structure using the magnetic force according to the first embodiment allows the magnitude of the restoring force to be easily adjusted by changing the size, shape, or material of the magnet, or by adjusting the clearance between the magnets. 
       FIG. 6  is a perspective view of the razor assembly  100  with a longitudinal portion of the razor handle  30  removed according to the first embodiment of the present disclosure. 
     As shown in  FIG. 6 , the single rotary magnet  40  is arranged, in its rest position, to face the single fixed magnet  45  in the longitudinal direction d 2 . 
     In the first embodiment of the present disclosure, the rotary magnet  40  and the fixed magnet  45  may be arranged so that attractive magnetic forces act on each other. With attractive magnetic force acting between the rotary magnet  40  and the fixed magnet  45 , such an arrangement can be implemented that the single rotary magnet  40  and the single fixed magnet  45  can pivot from their mutually opposite home positions to the opposite rotational directions. 
     Although the rotary magnet  40  and the fixed magnet  45  are each illustrated as singular, the present disclosure is not limited to this. For example, two or more of the rotary magnet  40  or the fixed magnet  45  may be provided. 
     With a plurality of rotary magnets  40  or fixed magnets  45  provided, the attractive magnetic forces between the rotary magnets  40  and the fixed magnets  45  are desirably symmetrical about the rest position of the connecting head  20 . Therefore, the multiple rotary magnets  40  or the multiple fixed magnets  45  may be disposed symmetrically with respect to the rest position of the connecting head  20 . 
     In this case, the multiple rotary magnets  40  or the multiple fixed magnets  45  may form one group as a whole, functioning as if they were a single magnet. 
       FIG. 7  is a cross-sectional view showing the shape of the razor assembly  100  when the connecting head is in the rest position according to the first embodiment of the present disclosure. 
     As shown in  FIG. 7 , at the rest position, closer from the blade housing  10  are the second axis ax 2 , the rotary magnet  40 , and the fixed magnet  45  in the stated order of arrangement. In addition, the rotary magnet  40  and the fixed magnet  45  are arranged face to face in the longitudinal direction d 2 . 
     Therefore, the distance between the rotation axis ax 2  and the rotary magnet  40  according to the first embodiment of the present disclosure may be made relatively short on the premise of the fixed distance between the rotation axis ax 2  and the fixed magnet  45 . 
     Relative to the case where the rotary magnet  40  is disposed not on the front side of the fixed magnet  45  but on the upper side, the lower side, or the rear side thereof, for example, the distance between the rotation axis ax 2  and the rotary magnet  40  may become shorter. 
     Here, the front side of the fixed magnet  45  means the side of the fixed magnet  45  facing toward the second axis ax 2 , and the upper side of the fixed magnet  45  means the side thereof showing the back surface of the blade housing  10 . 
     As a result, when it is assumed that the rotary magnet  40  moves over a constant span in the transverse direction d 1 , the pivoting angle of the connecting head  20  may be relatively greater with the rotary magnet  40  disposed on the front side of the fixed magnet  45  than when it is disposed elsewhere. 
     Consequently, the arrangement of the magnets  40 ,  45  according to the first embodiment of the present disclosure can advantageously increase the space efficiency of the product by requiring less space to obtain the same rotational range. 
     In the rest position, rotational resistance may occur in the connecting head  20  due to the attractive force between the rotary magnet  40  and the fixed magnet  45 . Therefore, when a force smaller than the rotational resistance acts on the connecting head  20 , the rotation of the connecting head  20  may be restricted. 
     The magnitude of the rotational resistance depends on the size and shape of the rotary magnet  40  and the fixed magnet  45  and the clearance between the rotary magnet  40  and the fixed magnet  45 , etc., and those values may be suitably designed for actual use. 
     For ease of use, it is desirable that the rotational resistance is about 0.015 kgf to about 0.2 kgf, but the present disclosure is not so limited. 
     A surface of the connecting head  20  on its other side opposed to the fixed magnet  45  may have a curved profile P. Here, the center of the curvature radius of the curved profile P is preferably located on the second axis ax 2 . 
     With the curved profile P of one surface on the other side of the connecting head  20 , the connecting head  20  is prevented, when rotating about the second axis ax 2 , from being brought into contact with the fixed magnet  45  or the magnet housing  49 . This, in effect, smoothens the rotation of the connecting head  20 . 
     Although one surface on the other side of the connecting head  20  is illustrated as having a curved profile, the present disclosure is not limited thereto. For example, a curved profile may be formed on the magnet housing  49  at one side opposite to the rotary magnet  40 , or a curved profile may be formed on both opposing surfaces of the connecting head  20  and the magnet housing  49 . 
       FIG. 8  is a plan view showing the shape of the razor assembly  100  when the connecting head is in the rotated position according to the first embodiment of the present disclosure. 
     As shown in  FIG. 8 , when the connecting head  20  rotates about the second axis ax 2 , the rotary magnet  40  may corotate with the connecting head  20  about the second axis ax 2  in the clockwise or counterclockwise direction. 
     When the rotary magnet  40  rotates about the second axis ax 2 , there is an attractive magnetic force  40  acting constantly between the rotary magnet  40  and the fixed magnet  45 . 
     As long as the force of turning the connecting head  20  is greater than the restoring force by the attraction of the rotary magnet  40  and the fixed magnet  45 , the connecting head  20  will rotate within its range of rotation. 
     Conversely, when the force to rotate the connecting head  20  is smaller than the restoring force by attraction of the rotary magnet  40  and the fixed magnet  45 , the connecting head  20  returns to the rest position from the rotated position. 
     The rotational range of the connecting head  20  may be limited to a specific angular range by a stopper. Specifically, when the connecting head  20  rotates, the other side of the connecting head  20  contacts a first rotation restricting portion  326 , and thereby limits the rotation of the connecting head  20  to a specific angular range. 
     A second rotation restricting portion  13  ( FIG. 1 ) is formed on one surface of the connecting head  20 , which is not accommodated in the head adapter  32 . When the connecting head  20  rotates about the second axis ax 2 , the second rotation restricting portion  13  contacts a restricting stepped portion  322  ( FIG. 1 ) formed on the head adapter  32 , whereby halting the rotation of the connecting head  20 . 
     The restricting stepped portion  322  may include a curved surface and the second rotation restricting portion  13  may include a curved surface corresponding to the shape of the restricting stepped portion  322  for smooth contacting therewith. However, the present disclosure is not limited to this. 
     When the connecting head  20  rotates beyond the rotational range defined by the first rotation restricting portion  326 , the second rotation restricting portion  13  serves to further limit the rotation of the connecting head  20 . Therefore, the rotational restriction range by the second rotation restricting portion  13  may be defined larger than the rotational restriction range by the first rotation restricting portion  326 . 
     However, the stopper structure of the connecting head  20  is not limited to this. For example, the razor assembly  100  may include only one of the first rotation restricting portion  326  and the second rotation restricting portion  13 , and it may be configured to have the rotational restriction range by the first rotation restricting portion  326  to be larger than that by the second rotation restricting portion  13 . 
     The second embodiment of the present disclosure illustrated in  FIG. 9  to  FIG. 12 , which is described below, differs from the first embodiment of the present disclosure illustrated in  FIGS. 1 to 8  in that a rotary magnet is a magnetic metal and has a spherical shape. The following focuses on distinctive features of the second embodiment of the present disclosure, and refrains from repetitive description of the configuration substantially the same as the first embodiment of the present disclosure. 
       FIG. 9  is a cross-sectional view showing the shape of a razor assembly  200  with a connecting head  120  being in the rest position according to the second embodiment of the present disclosure. 
     A head adapter  132 , a first rotation restricting portion  1326 , a grip  133 , and a razor handle  130  included in the razor assembly  200 , as shown in  FIG. 9 , correspond to the head adapter  32 , the first rotation restricting portion  326 , the a grip  33 , and the razor handle  30 , respectively, included in the razor assembly  100  shown in  FIGS. 1-3 and 5-8 . 
     As shown in  FIG. 9 , in the second embodiment of the present disclosure, the rotary magnet  40  is made of a magnetic metal and the fixed magnet  45  is made of a permanent magnet. 
     It is desirable that ferromagnetic metals such as iron, cobalt and nickel be used for the magnetic metal constituting the rotary magnet  40 , although the present disclosure is not limited thereto. Therefore, the magnetic metal other than the above-mentioned metals may be used for the rotary magnet  40  as long as an attraction acts thereon by the permanent magnet. 
     The rotary magnet  40  has a spherical shape, and the fixed magnet  45  has a cylindrical shape. 
     The permanent magnet has the N pole and the S pole, which makes it disadvantageous to fabricate the permanent magnet in a spherical shape in terms of the manufacturing process. For example, when a spherical permanent magnet is divided into two hemispherical regions, it is practically difficult to manufacture a permanent magnet such that each hemispherical region has exactly N pole and S pole. 
     Further, manufacturing the permanent magnet in a spherical shape may require an additional process in which the specific poles of the permanent magnets are arranged so as to face a specific direction, which is disadvantageous in terms of the manufacturing process. 
     Manufacturing the spherical shape of permanent magnet is illustrated above, but the problem with the above-mentioned permanent magnet is also applicable to manufacturing a permanent magnet having an unusual shape, for example, a hemisphere, circular cone, poly pyramid, or the like. 
     On the other hand, the magnetic metal has no specific pole unlike the permanent magnet. Therefore, fabricating magnetic metal in the spherical shape or other shapes may be easier than with permanent magnets. 
     In addition, spherical shape or others, a magnetic metal may be placed on a product requiring no procedure for arraying a specific pole to be directed to a specific direction, which is an extra advantage of the magnetic metal in terms of the manufacturing process. 
     Employing a magnetic metal obviates the need for the step of placing a specific pole so as to point in a specific direction, while facilitating the manufacturing thereof in non-cylindrical shapes. 
     Further, the magnetic metal is cheaper than the permanent magnet, which it is advantageous in terms of cost as compared with the case where both the rotary magnet  40  and the fixed magnet  45  are made of permanent magnets. 
     As compared with permanent magnets having the common size and common volume, the magnetic metal may have a relatively small restoring force, which is offset with the advantage of freeform fabrication in implementation. 
     Upon such consideration, the second embodiment of the present disclosure bases the making of the rotary magnet  40  into a spherical magnetic metal. Thereby, the second aspect of the present disclosure complements the issue of the relatively small restoring force of the magnetic metal while encompassing the advantage of the magnetic metal described above. 
       FIG. 10  shows lines of magnetic forces acting between a rotary magnet and a fixed magnet according to the second embodiment of the present disclosure. 
     Specifically,  FIG. 10  shows at (a) lines of magnetic force acting between a rotary magnet  1040  and a fixed magnet  1045  both having cylindrical shapes, and  FIG. 10  shows at (b) lines of magnetic force acting between a rotary magnet  40  having a spherical shape and a fixed magnet  45  having a cylindrical shape. 
     The rotary magnets  1040 ,  40  shown in  FIG. 10  are both made of magnetic metal, and the fixed magnets  1045 ,  45  are both made of permanent magnets. Therefore, the lines of magnetic force between the rotary magnets  1040 ,  40  and the fixed magnet  1045 ,  45  are all lines of magnetic force exhibiting the attractive magnetic force. 
     Additionally, for the sake of convenience of explanation,  FIG. 10  illustrates that one ends of the fixed magnets  1045 ,  45  facing the rotary magnets  1040 ,  40  are N poles, while one ends of the rotary magnets  1040 ,  40  each facing the N pole end of the fixed magnets  1045 ,  45  has their polarity induced by the magnetism of the fixed magnets  1045 ,  45  into S poles. However, the present disclosure is not limited to this, when the one end of the rotary magnets  1040 ,  40  and the one end of the fixed magnets  1045 ,  45  may have an N pole and an S pole, respectively. 
     Additionally, for the sake of convenience of explanation,  FIG. 10  shows only the lines of magnetic force acting face to face between the rotary magnets  1040 ,  40  and the fixed magnets  1045 ,  45 . Accordingly, though not illustrated in  FIG. 10 , it is understood that a magnetic force is exerted elsewhere between the rotary magnets  1040 ,  40  and the fixed magnets  1045 ,  45  besides their opposing faces. 
     As shown in  FIG. 10( a ) , the rotary magnet  1040  and the fixed magnet  1045  are arranged symmetrically with respect to the center line (S) in the rest position. 
     As a result, the lines of magnetic force acting between the rotary magnet  1040  and the fixed magnet  1045  may also be disposed symmetrically with respect to the center line (S). 
     The cylindrical rotary magnet  1040  and the cylindrical fixed magnet  1045 , when in the rest position, have parallel opposing faces. Therefore, the clearance between the rotary magnet  1040  and the fixed magnet  1045  is constant regardless of the distance from the center line (S). 
     The magnitude of the magnetic force acting between two points is inversely proportional to the square of the distance between the two points, and therefore the magnitude of the magnetic force acting between the two opposing faces of the rotary magnet  1040  and the fixed magnet  1045  is substantially constant whether it is measured in the region near the center line (S) or measured in the region away from there. 
     In other words, the magnetic force acting between the rotary magnet  1040  and the fixed magnet  1045  is evenly distributed between the mutually opposed faces of the rotary magnet  1040  and the fixed magnet  1045 . 
     In this case, it is difficult to return or align a connecting head to the correct rest position when the connecting head rotates within a very small angular range from the rest position. 
     In  FIG. 10( b ) , the rotary magnet  40  and the fixed magnet  45  are arranged symmetrically with respect to the center line (S) in a rest position. 
     Thus, the lines of magnetic force acting between the rotary magnet  40  and the fixed magnet  45  may also be disposed symmetrically with respect to the center line (S). 
     The spherical rotary magnet  40  and the cylindrical fixed magnet  45  when in a rest position, have their distance increased gradually away from the center line (S) until the distance between the rotary magnet  40  and the fixed magnet  45  is shortest on the center line (S). 
     Since the magnitude of the magnetic force acting between two points is inversely proportional to the square of the distance between the two points, the magnitude of the applied magnetic force between the opposing faces of the rotary magnet  40  and the fixed magnet  45  is largest in the region in the vicinity of the center line (S) and gradually decreases as it goes away from the center line (S). In other words, the magnetic force acting between the rotary magnet  40  and the fixed magnet  45  is concentrated and distributed near the center line (S). 
     As a result, when a connecting head rotates within a small angular range from the rest position, the attractive magnetic forces most strongly acting on the center line (S) causes the connecting head to accurately return or self-align to the rest position. 
     Although the rotary magnet  40  is illustrated as having a spherical shape, the present disclosure is not limited thereto. As long as the rotary magnet  40  is shaped to apply magnetic force in the rest position stronger in the vicinity of the center line (S) than when in the region away from the center line (S), such contour of the rotary magnet  40  is good to provide the merit of the present disclosure. 
     For example, the rotary magnet  40  may have, only in its portion facing the fixed magnet  45 , the shape of partial hemisphere, circular cone, or poly pyramid. 
       FIG. 11  is a cross-sectional perspective view of a pivot space G of the connecting head  120  and the rotary magnet  40  housed in the pivot space G according to the second embodiment of the present disclosure. 
     As shown in  FIG. 11 , the spherical rotary magnet  40  is accommodated in the pivot space G formed on the other side of the connecting head  120 . 
     The connecting head  120  includes a head-side opening  1222  formed on the connecting head  120  at its other side opposing the fixed magnet  45 . 
     A part of a rotary magnet  40  accommodated in the pivot space G of the connecting head  120  may be exposed outside of the connecting head  120  via the head-side opening  1222 . 
     On the other side of the connecting head  120  opposite the fixed magnet  45 , the remaining part excluding the head-side opening  1222  may provide a head-side locking step  122 . 
     The other unexposed part of the rotary magnet  40  of the head-side opening  1222  is configured to abut the head-side locking step  122 . This prevents the rotary magnet  40  under the attractive magnetic force from passing through the head-side opening  1222  before it breaks free from the connecting head  120 . 
     With the rotary magnet  40  partially exposed through the head-side opening  1222 , the rotary magnet  120  may come closer to the fixed magnet  45  in the longitudinal direction d 2 , whereby increasing the attractive magnetic force acting between the rotary magnet  40  and the fixed magnet  45 . 
     In addition, with the rotary magnet  40  partially exposed externally through the head-side opening  1222 , the rotary magnet  40  and the fixed magnet  45  may keep their interspace unblocked by the other side of the connecting head  120 . This minimizes the reduction of the attractive magnetic force due to, otherwise, blocked space between the two magnets. 
     As a result, the razor assembly  200  according to the second embodiment of the present disclosure includes the head-side opening  1222 , so that, with the equal size or shape of the magnets  40 ,  45  or the equal distance between the pivot space G and a magnet housing  49 , the maximum possible attraction can be provided between the rotary magnet  40  and the fixed magnet  45 . 
     Although the rotary magnet  40  has a spherical shape and the head-side opening  1222  has a circular shape for the purpose of illustration, the present disclosure is not so limited. 
     For example, the rotary magnet  40  may have the shape of a hemisphere, a cone, a polygonal pyramid or other shapes, and the head-side opening  1222  may be contoured as a triangle, square, cross, or other shapes following the shape of the rotary magnet  40 . 
     In addition, although the head-side opening  1222  is illustrated as being formed on the connecting head  120 , the present disclosure is not limited thereto. For example, in some embodiments where the rotary magnet  40  is coupled to the connecting head  120  while being received in another receiving member, the head-side opening  1222  is formed on the receiving member at one side opposing the fixed magnet  45 . 
       FIG. 12  is a perspective view of a magnet housing  49  and the fixed magnet  45  accommodated in the magnet housing  49  according to the second embodiment of the present disclosure. 
     As shown in  FIG. 12 , the cylindrical fixed magnet  45  is accommodated in a magnet housing  49 . Specifically, the fixed magnet  45  is accommodated in a magnet housing portion  494  of the magnet housing  49 . 
     The magnet housing  49  includes a housing-side opening  498  formed in the magnet housing  49  at its one side surface opposed to the rotary magnet  40 . 
     A part of the fixed magnet  45  housed in the magnet housing portion  494  may be exposed to the outside of the magnet housing  49  through the housing-side opening  498 . 
     The remaining part of one side of the magnet housing  49  opposed to the rotary magnet  40  excluding the housing-side opening  498  may provide a housing-side locking step  496 . 
     The other unexposed part of the fixed magnet  45  of the housing-side opening  498  is configured to abut the housing-side locking step  496 . This prevents the fixed magnet  45  under the attractive magnetic force from passing through the housing-side opening  498  before it breaks free from the magnet housing  49 . 
     With the fixed magnet  45  partially exposed externally through the housing-side opening  498 , the rotary magnet  40  and the fixed magnet  45  may keep their interspace unblocked by the one side of the magnet housing  49 . This minimizes reduction of attractive magnetic force due to otherwise blocked space between the two magnets  40 ,  45 . 
     Accordingly, the razor assembly  200  according to the second embodiment of the present disclosure includes the housing-side opening  498 , so that, with the equal size or shape of the magnets  40 ,  45  or the equal distance between the pivot space G and the magnet housing  49 , the maximum possible attraction can be provided between the rotary magnet  40  and the fixed magnet  45 . 
     The housing-side opening  498  is illustrated as having a cross shape, but the present disclosure is not limited thereto. For example, the housing-side opening  498  may also have a polygonal shape, such as a circular shape, a triangle, a square or other shapes. 
       FIG. 13A  is a plan view of a razor assembly  300  according to the third embodiment of the present disclosure as viewed from the front of a razor handle  230  (the side where the front of the blade housing  10  is visible),  FIG. 13B  a rear view of the razor assembly  300 , and  FIG. 13C  is a rear perspective view of the razor assembly  300 . 
     The razor assembly  300  according to the third embodiment of the present disclosure includes a razor cartridge including a shaving blade  5 , a blade housing  10 , and includes a connecting head  220  and a razor handle  230 . The shaving blade  5  has one end provided with a cutting edge, and the other end seated on a seat provided in the blade housing  10 . Here, the shaving blade  5  is housed in the blade housing  10  in the transverse direction d 1  perpendicular to the shaving direction. In addition, the structure of the blade housing  10  is the same as that of  FIG. 1 , and duplicate explanation will be omitted. 
     In  FIG. 13A , the connecting head  220  is detachably coupled to the blade housing  10  at a back side  12  of the blade housing  10 . Here, the blade housing  10  can rotate with respect to the one end of the connecting head, about the first axis ax 1  extending in parallel with the transverse direction d 1  in which the shaving blade  5  is housed. 
     Meanwhile, the connecting head  220  is also coupled to the razor handle  230  at the opposite end so as to be rotatable with respect to a rotation axis ax 2  perpendicular to the transverse direction d 1 . The rotation axis, i.e., second axis ax 2  is formed in a direction perpendicular to both the transverse direction d 1  and the longitudinal direction d 2 . Such linkage is established by a fastening member  50  that passes through both the connecting head  220  and the razor handle  230  at the position of the second axis ax 2 . The fastening member  50  may be implemented as a fixing pin, but it is not limited thereto, and encompasses a shaft-shaped member that allows for a rotational motion between the connecting head  220  and the razor handle  230 . 
       FIG. 14  is an exploded perspective view of the razor assembly  300  of  FIG. 13A . Here, the blade housing  10  and the connecting head  220  are shown connected to each other. 
     The connecting head  220  is rotatably coupled to the razor handle  230  by the fastening member  50 . The razor handle  230  may be formed integrally as shown in  FIG. 14 , although it may be made of two receiving members divided longitudinally. The razor handle  230  provides a housing space  231  for accommodating a pivoting member  224  of the connecting head  220 . Specifically, the pivoting member  224  may be coupled to the inside of a shoulder  236  formed in the housing space  231 . Then, the fastening member  50  passes at the position of the second axis ax 2 , all the way through holes  234   a ,  234   b  of the razor handle  230  and a through hole  222  ( FIG. 15 ) formed in the connecting head  220 . 
       FIG. 15  is a plan view showing the shape of the razor assembly  300  when the connecting head  220  is in the rotated position. Here, for inspection of the inside, the razor handle  230  is illustrated in a longitudinal cutaway view. As described above, the connecting head  220  is formed with a pivoting member  224  at its end opposite to the blade housing  10 . The pivoting member  224  has a receiving recess  225  for accommodating a rotary magnet  40 , and the razor handle  230  has a receiving recess  235  for accommodating a fixed magnet  45  on the inner side thereof where the housing space  231  is formed. Therefore, in the rest position, the rotary magnet  40  and the fixed magnets  45  are accommodated in the respective receiving recesses  225 ,  235 , and are spaced apart so as to face each other in a direction parallel to the longitudinal direction d 2 . In other words, the direction in which the rotary magnet  40  and the fixed magnet  45  are arranged facing each other is in parallel with the second axis ax 2 . Here, the rotary magnet  40  and the fixed magnet  45  are in a facing arrangement, which means that the magnets  40 ,  45  are arranged side by side such that the wide surfaces thereof face each other. At this time, when measured from the blade housing  10 , the distance to the position of the second shaft ax 2  at which the fastening member  50  is fastened is shorter than that to the position of the pivoting member  224  or the rotary magnet  40 . 
     When the connecting head  220  rotates, the rotary magnet  40  rotates clockwise or counterclockwise about the second axis ax 2  from its opposing rest position, moving away from the fixed magnet  45 . At this time, the opposite polarities between the rotary magnet  40  and the fixed magnet  45  generate attractive magnetic force acting therebetween. Accordingly, the pivoting member  224  equipped with the rotary magnet  40  and the connecting head  220  return to the rest position. 
     When the pivoting member  224  thus makes a rotational motion in the housing space  231 , its rotational range is limited within a specific angle by a stopper. This is intended to limit the rotational range about the second axis ax 2  within a comfort range against inducing discomfort to the user when shaving, which serves as a stopper. The stopper function is offered in this embodiment by causing the stepped pivoting member  224  to contact the shoulder  236 . However, this does not limit the present disclosure, where the pivoting member  224  may be limited by both side walls of the housing space  231  of the razor handle  230 . 
       FIG. 16A  is a plan view of a razor assembly  400  according to the fourth embodiment of the present disclosure as viewed from the front of the razor handle  330 ,  FIG. 16B  is a rear view of the razor assembly  400 , and  FIG. 16C  is a rear perspective view of the razor assembly  400 . 
     The razor assembly  400  according to the fourth embodiment includes a blade housing  10 , a connecting head  320  and a razor handle  330 . Here, the shaving blade  5  is housed in the blade housing  10  in the transverse direction d 1  perpendicular to the shaving direction. In addition, the structure of the blade housing  10  is the same as that of  FIG. 1 , and redundant description will be omitted. 
     In  FIG. 16A , the connecting head  320  is detachably coupled to the blade housing  10  at a back side of the blade housing  10 . Here, the blade housing  10  can rotate with respect to the one end of the connecting head  320  about the first axis ax 1  extending in parallel with the transverse direction d 1  in which the shaving blade  5  is housed. 
     Meanwhile, the connecting head  320  is also coupled to the razor handle  330  at its opposite end so as to be rotatable with respect to the rotation axis ax 2  perpendicular to the transverse direction d 1 . The rotation axis, i.e., second axis ax 2  is formed in a direction perpendicular to both the transverse direction d 1  and the longitudinal direction d 2 . Such linkage is established by a fastening member  50  that passes through both the connecting head  320  and the razor handle  330  at the position of the second axis ax 2 . The fastening member  50  may be implemented as a fixing pin, but it is not limited thereto, and encompasses a shaft-shaped member that allows for a rotational motion between the connecting head  320  and the razor handle  330 . 
       FIGS. 17A to 17C  are exploded perspective views of the razor assembly  400  of  FIG. 16A  viewed from different directions. Here, the blade housing  10  and the connecting head  320  are shown in a mutually coupled state. 
     On the opposite side of the blade housing  10 , the connecting head  320  is pivotally connected to the razor handle  330  by the fastening member  50 . Although the razor handle  330  may be formed integrally, this embodiment illustrates that it is made of two receiving members  330   a ,  330   b  divided longitudinally. 
     The first and second receiving members  330   a ,  330   b  that constitute the razor handle  330  provide housing spaces  338   a ,  338   b  for accommodating a pivoting member  324  of the connecting head  320 . 
     Specifically, the pivoting member  324  may be coupled to the inside of a shoulder  336  formed in the housing spaces  338   a ,  338   b . Then, the fastening member  50  passes at the position of the second axis ax 2 , all the way through holes  334   a ,  334   b  of the razor handle  330  and a through hole  322  ( FIG. 15 ) formed in the connecting head  320 . 
       FIG. 18  is a perspective view of the razor assembly  400  in which a longitudinal part of the second receiving member  330   b  is removed. Here, the pivoting member  324  is coupled to the inside of the shoulder  336  formed in the housing spaces  338   a ,  338   b . The pivoting member  324  has a receiving recess  325  for accommodating a rotary magnet  40 , and the razor handle  330  has a receiving recess  335  for accommodating a fixed magnet  45  on the inner side of the shoulder  336 . Therefore, in the rest position, the rotary and fixed magnets  40 ,  45  are accommodated in the respective receiving recesses  325 ,  335 , and are spaced apart so as to face each other in a direction parallel to the longitudinal direction d 2 . 
     In other words, the direction in which the rotary and fixed magnets  40 ,  45  are arranged to face each other is in parallel with the longitudinal direction. At this time, the position of the second axis ax 2  to which the fastening member  50  is fastened, the position of the fixed magnet  45  and the position of the rotary magnet  40  are arranged closer to the blade housing  10  in the stated order of arrangement. 
       FIG. 19A  is a plan view showing the shape of the razor assembly  400  of  FIG. 18  when the connecting head  320  is in a rest position.  FIG. 19B  is a plan view showing the shape of the razor assembly  400  of  FIG. 18  when the connecting head  320  is in the rotated position. 
     As shown in  FIG. 19A , the rotary magnet  40  and the fixed magnet  45  are arranged to face in the longitudinal direction d 2  at the rest position. Here, since the rotary and fixed magnet  40 ,  45  have the same polarity, they exert mutual repulsive forces. 
     As shown in  FIG. 19B , when the connecting head  320  rotates, the rotary magnet  40  moves clockwise or counterclockwise about the second axis ax 2  from its opposite rest position. 
     At this time, a part of the rotary magnet  40  gets closer to the fixed magnet  45 , while some other part of the rotary magnet  40  moves away from the fixed magnet  45 . However, the magnitude of the magnetic force is inversely proportional to the square of the distance between magnets, and therefore the repulsive force between the magnets  40 ,  45  in this rotated position is increased relative to the repulsive force between the magnets  40 ,  45  at the rest position. Therefore, the pivoting member  324  having the rotary magnet  40  and the connecting head  320  return to the rest position. 
     When the pivoting member  324  thus makes a rotational motion in the housing spaces  338   a ,  338   b , the rotational range thereof is limited within a specific angle by a stopper. This is intended to limit the rotational range about the second axis ax 2  within a comfort range against inducing discomfort to the user when shaving, which serves as a stopper. The stopper function is offered in the present embodiment by causing the pivoting member  324  when rotating, to contact both side walls forming the housing spaces  338   a ,  338   b . However, the present disclosure is not limited thereto, and the pivoting member  324  may be brought into contact with the shoulder  336  of the razor handle  330 . 
       FIG. 20  is a rear perspective view of a razor assembly  500  according to the fifth embodiment of the present disclosure as viewed from one side thereof. The razor assembly  500  according to the fifth embodiment of the present disclosure includes a blade housing  10 , a connecting head  420  and a razor handle  430 . 
     Here, the direction in which the shaving blade  5  is housed in the blade housing  110  is the transverse direction d 1  perpendicular to the shaving direction. In addition, the structure of the blade housing  10  is the same as that of  FIG. 1 , and redundant description will be omitted. 
     In  FIG. 20 , the connecting head  420  is detachably coupled to the blade housing  10  at a back side of the blade housing  10 . Here, the blade housing  10  can rotate with respect to the one end of the connecting head, about the first axis ax 1  extending in parallel with the transverse direction d 1  in which the shaving blade  5  is housed. 
     Meanwhile, the connecting head  420  is also coupled to the razor handle  430  at its opposite end so as to be rotatable with respect to the rotation axis ax 2  perpendicular to the transverse direction d 1 . The second axis ax 2  is formed in a direction perpendicular to both the transverse direction d 1  and the longitudinal direction d 2 . Such linkage is established by a fastening member  50  that passes through both the connecting head  420  and the razor handle  430  at the position of the second axis ax 2 . The fastening member  50  may be implemented as a fixing pin, but it is not limited thereto, and encompasses a shaft-shaped member that allows for a rotational motion between the connecting head  420  and the razor handle  430 . 
       FIG. 21A  and  FIG. 21B  are exploded perspective views of the razor assembly  500  of  FIG. 20  viewed from different directions. Here, the blade housing  10  and the connecting head  420  are shown in an intercoupled state. 
     On the opposite side of the blade housing  10 , the connecting head  420  is pivotally connected to the razor handle  430  by the fastening member  50 . Although the razor handle  430  may be formed integrally, the present embodiment illustrates that it is made of two longitudinal parts of receiving members  430   a ,  430   b.    
     The first and second receiving members  430   a ,  430   b  constituting the razor handle  430  provide housing spaces  438   a ,  438   b  for accommodating a pivoting member  424  of the connecting head  420 . 
     Specifically, the pivoting member  424  may be coupled to the inside of a shoulder  436  formed in the housing spaces  438   a ,  438   b . Then, the fastening member  50  passes at the position of the second axis ax 2 , all the way through holes  434   a ,  434   b  of the razor handle  430  and a through hole  422  into its fastened position. 
       FIGS. 22A through 22C  are a plan view and perspective views of the horizontally cut first and second receiving members  430   a ,  430   b  of the razor assembly  500 . 
     Here, the pivoting member  424  is coupled to the inside of a shoulder  336  formed in the housing spaces  438   a ,  438   b . The pivoting member  424  includes a receiving recess  425  for accommodating a rotary magnet  40 , and the razor handle  430  has both side surfaces thereof provided with receiving recesses  435 ,  437  for accommodating a first fixed magnet  45  and a second fixed magnet  47 . 
     At the rest position, the rotary and fixed magnets  40 ,  45 ,  47  are accommodated in the respective receiving recesses  425 ,  435 ,  437  and are spaced apart so as to face each other in a direction parallel to the transverse direction d 1  in which the shaving blade is arranged. In other words, the direction in which the rotary and fixed magnets  40 ,  45 ,  47  are arranged facing each other is in parallel with the transverse direction d 1 . At this time, when measured from the blade housing  10 , the position of the second shaft ax 2  at which the fastening member  50  is fastened is farther than the position where the magnets  40 ,  45 ,  47  face each other. 
       FIG. 23A  is a plan view showing the shape of the razor assembly  500  when the connecting head  420  is in the rest position.  FIG. 23B  is a plan view showing the shape of the razor assembly  500  when the connecting head  420  is in the rotated position. Here, the inside of the housing space  438   a  has been made visible by removing the second receiving member  430   b.    
     As shown in  FIG. 23A , in a rest position, a rotary magnet  40  is provided between the first fixed magnet  45  and the second fixed magnet  47  in an opposing manner to the transverse direction d 1  in which the shaving blade  5  is arranged. Here, repulsive forces act both between the rotary magnet  40  and the first fixed magnet  45 , and between the rotary magnet  40  and the second fixed magnet  47 . Some embodiments may use such arrangement as in  FIG. 13  for providing the repulsive forces exclusively between the magnets in close proximity. In the example of  FIG. 24 , the N poles and the S poles are formed in the fixed magnets  45 ,  47  in the same direction, while the rotary magnet  40  forms the N pole and the S pole in the opposite direction thereto. This generates a repulsive force due to the S-pole repulsion between the rotary magnet  40  and the first fixed magnet  45 , as well as another repulsive force due to the N-pole repulsion between the rotary magnet  40  and the second fixed magnet  47 . 
     Referring again to  FIG. 23B , when the connecting head  420  rotates, the rotary magnet  40  moves from the rest position clockwise or counterclockwise about the second axis ax 2 . When rotating in the counterclockwise direction, the rotary magnet  40  approaches the second fixed magnet  47 , increasing the repulsive force therebetween. Due to such repulsive force, when an external force is removed, the pivoting member  424  equipped with the rotary magnet  40  and the connecting head  420  will return in a clockwise rotation to the rest position. Similarly, when rotating in the clockwise direction, the rotary magnet  40  approaches the first fixed magnet  45 , increasing the repulsive force therebetween. Due to such repulsive force, when an external force is removed, the pivoting member  424  equipped with the rotary magnet  40  and the connecting head  420  will return in a counterclockwise rotation to the rest position. 
     In the present embodiment, the repulsive force increases between the rotary magnet  40  and the other magnets  45 ,  47  as the rotational angle of the rotary magnet  40  increases. This provides the structural stability of the rotation about the second axis ax 2  in that the returning force to the rest position increases as the connecting head  420  makes bigger swing. This provides an elastic restoring mechanism as with the typical spring structure. 
     Meanwhile, when the pivoting member  424  makes a rotational motion in the housing spaces  438   a ,  438   b , its rotational range is limited within a specific angle. This is intended to limit the rotational range about the second axis ax 2  within a comfort range against inducing discomfort to the user when shaving, which serves as a stopper. The stopper function is offered in the present embodiment by causing the pivoting member  424  to contact two fixed magnets  45 ,  47 . However, this does not limit the present disclosure, where the pivoting member  424  may be caused to contact with the shoulder  436  of the razor handle  430 . 
     The aforementioned third to fifth embodiments of the present disclosure discussed the razor assemblies  100 ,  200 ,  300 ,  400  and  500  with the connecting head using the attractive magnetic force or the repulsive force between the plurality of magnets, to be rotatable about the second axis ax 2  perpendicular both to the transverse direction d 1  in which the shaving blades are arranged and to the longitudinal direction d 2 . The following embodiments are in regard to razor assemblies with a connecting head using an attractive magnetic force or repulsive force between a plurality of magnets, to be rotatable about a third axis ax 3  extending in parallel with the longitudinal direction d 2 . 
       FIG. 25A  is a plan view of a razor assembly  600  according to the sixth embodiment of the present disclosure as viewed from the front of the blade housing  10 ,  FIG. 25B  is a rear view of the razor assembly  600 , and  FIG. 25C  is a rear perspective view of the razor assembly  600 . 
     A razor assembly according to the sixth embodiment of the present disclosure includes a razor cartridge including a shaving blade  5  and a blade housing  10 , a connecting head  520 , and a razor handle  530 . The shaving blade  5  has one end provided with a cutting edge, and the other end seated on a seat provided in the blade housing  10 . Here, the shaving blade  5  is housed in the blade housing  10  in the transverse direction d 1  perpendicular to the shaving direction. Further structure of the blade housing  10  is the same as that of  FIG. 1 , and redundant description will be omitted. 
     In  FIG. 25A , the connecting head  520  has its one end detachably coupled to the blade housing  10  at a back side thereof. Here, the blade housing  10  can rotate with respect to the one end of the connecting head, about the first axis ax 1  extending in parallel with the transverse direction d 1  in which the shaving blade  5  is housed. On the other hand, formed on the other end of the connecting head  520 , a central axis  529  is also joined to the razor handle  530  so as to be rotatable with respect to the rotation axis ax 3  perpendicular to the transverse direction d 1 . In addition, the third axis ax 3  is formed in a direction parallel to the longitudinal direction d 2 . 
       FIG. 26  is an exploded perspective view of the razor assembly  600  of  FIG. 25A . Here, the blade housing  10  and the connecting head  520  are shown intercoupled. 
     On the opposite side of the blade housing  10 , the central shaft  529  of the connecting head  520  is coupled to be rotatable about the third axis ax 3  with respect to the razor handle  530 . The razor handle  530  may be formed integrally as shown in  FIG. 26 , although it may be made of two longitudinal parts of receiving members. A pivoting member  524  is provided at the end of the central shaft  529 , and the pivoting member  524  is formed with a receiving recess  525 . The receiving recess  525  accommodates a rotary magnet  40  in the direction of the third axis ax 3 . When the central axis  529  is coupled with the razor handle  530 , the pivoting member  524  is completely housed within the housing space of the razor handle  530 . At this time, the pivoting member  524  may be coupled to the inside of a shoulder  536  ( FIG. 27A ) formed in the razor handle  530 . In particular, the shoulder  536  of the razor handle  530  may be aligned with a stepped groove  526  formed in the pivoting member  524 . 
     Meanwhile, centrally of the rotary magnet  40 , an offset ‘e’ is formed by a predetermined interval between the rotation axis ax 3  of both the central axis  529  and a connecting member  520  and an extension line d 3  extending in a direction in which the rotary magnet  40  is arranged. In other words, to the center of the rotary magnet  40 , eccentricity is established by an offset e′ from the rotation axis ax 3 . The fixed magnet  45  accommodated in a receiving recess  535  (FIG.  27 A) in the razor handle  530  is disposed so as to face the rotary magnet  40  at the rest position. Similarly, the fixed magnet  45  may be eccentric by offset ‘e’ from the rotation axis ax 3 . Such an offset ‘e’ is formed in the anterior-posterior direction of the connecting head  520 , which will no longer be visible in the following  FIG. 27A  and  FIG. 27B . 
       FIG. 27A  is a plan view showing the shape of the razor assembly  600  when the connecting head  520  is in the rest position.  FIG. 27B  is a plan view showing the shape of the razor assembly  600  when the connecting head  520  is in the rotated position. Here, the interior of the housing space  538  has been made visible by removing a longitudinal part of the razor handle  530 . 
     As shown in  FIG. 27A , at a rest position, a rotary magnet  40  is disposed facing the fixed magnet  45  in the longitudinal direction d 2 . Here, the polarities of the rotary magnet  40  and the fixed magnet  45  are different from each other, and an attractive magnetic force acts between them. 
     As shown in  FIG. 27B , when the connecting head  520  pivots about the third axis ax 3 , the pivoting member  524  rotates about the third axis ax 3  clockwise or counterclockwise from the rest position. At this time, since the rotary magnet  40  is eccentric by the offset ‘e’ from the third axis ax 3 , it deviates somewhat from the position facing the fixed magnet  45 . 
     However, with an attractive magnetic force acting between the rotary and fixed magnets  40 ,  45 , when an external force is removed, the rotary magnet  40  will return to its own opposite position. In this way, the pivoting member  524  containing the rotary magnet  40  and the connecting head  520  follow suit in an opposite rotational motion to return to the rest position. 
     Both the rotary magnet  40  and the fixed magnet  45  may be implemented by magnets as illustrated, whereas the sixth embodiment takes advantage of a mutual attraction which can be achieved by replacing one of the rotary magnet  40  and the fixed magnet  45  by a magnetic metal with which an opposing magnet can exerts attractive magnetic force. A ferromagnetic metal such as iron, cobalt and nickel may be used as the magnetic metal, although other substances than these metals may be used as the magnetic metal as long as it is a substance on which an attractive magnetic force acts by the permanent magnet. 
     When the pivoting member  524  makes a rotational motion in the housing space  538 , the rotational range thereof is limited within a specific angle. This is intended to limit the rotational range about the third axis ax 3  within a comfort range against inducing discomfort to the user when shaving, which serves as a stopper. The stopper function is offered in the present embodiment by causing the eccentric pivoting member  524  when rotating, to contact both side walls the housing space  538 . However, the present disclosure is not limited thereto, and the stopper function may be well provided by other methods. 
       FIG. 28  is a rear perspective view of a razor assembly  700  according to the seventh embodiment of the present disclosure as viewed from one side of the blade housing  10 . 
     The razor assembly  700  according to the seventh embodiment of the present disclosure includes a razor cartridge including a shaving blade  5  and a blade housing  10 , a connecting head  620 , and a razor handle  630 . The shaving blade  5  has one end provided with a cutting edge, and the other end seated on a seat provided in the blade housing  10 . Here, the shaving blade  5  is housed in the blade housing  10  in the transverse direction d 1  perpendicular to the shaving direction. Further structure of the blade housing  10  is the same as that of  FIG. 1 , and redundant description will be omitted. 
     In  FIG. 28 , the connecting head  620  has its one end detachably coupled to the blade housing  10  at a back side thereof. Here, the blade housing  10  can rotate with respect to the one end of the connecting head, about the first axis ax 1  extending in parallel with the transverse direction d 1  in which the shaving blade  5  is housed. On the other hand, formed on the other end of the connecting head  620 , a central axis  629  is also joined to the razor handle  630  so as to be rotatable with respect to the rotation axis ax 3  perpendicular to the transverse direction d 1 . In addition, the third axis ax 3  is formed in a direction parallel to the longitudinal direction d 2 . 
       FIG. 29A  is an exploded perspective view of the razor assembly  700  of  FIG. 28 .  FIG. 29B  is a plan view of an exploded perspective view of the razor assembly  700  of  FIG. 29A . Here, the blade housing  10  and the connecting head  620  are shown connected to each other.  FIG. 29B  shows the interior of the housing space  638  by removing a longitudinal part of the razor handle  630 . 
     On the opposite side of the blade housing  10 , the central shaft  629  of the connecting head  620  is coupled to be rotatable about the third axis ax 3  with respect to the razor handle  630 . The razor handle  630  may be formed integrally as shown in  FIG. 29A , although it may be made of two longitudinal parts of receiving members. A pivoting member  624  is provided at the end of the central shaft  629 , and the pivoting member  624  is formed with a receiving recess  625 . The receiving recess  625  is formed in a direction d 4  perpendicular to both the transverse direction d 1  and the third axis ax 3  to accommodate a rotary magnet  40 . When the central axis  629  is coupled with the razor handle  630 , the pivoting member  624  is completely housed within the housing space of the razor handle  630 . At this time, a fixed magnet  45  is attached to a magnet housing portion  636  of the razor handle  63 , so that the rotary magnet  40  and the fixed magnet  45  are spaced apart from each other both facing in the vertical direction d 4  at the rest position. 
       FIG. 30A  and  FIG. 30B  are a perspective view and a plan view, respectively, showing the shape of the razor assembly  700  when the connecting head  620  is in the rest position. FIG.  30 C is a plan view showing the shape of a razor assembly  700  when the connecting head  620  is in a rotated position. Here, the interior of the housing space  638  has been made visible by removing a longitudinal part of the razor handle  630 . 
     As shown in  FIG. 30A  and  FIG. 30B , at the rest position, both the rotary magnet  40  and the fixed magnet  45  are disposed facing the direction d 4  that is perpendicular. Here, the polarities of the rotary magnet  40  and the fixed magnet  45  are the same, and a repulsive force acts between them. 
     As shown in  FIG. 30C , when the connecting head  620  rotates about the third axis ax 3 , the pivoting member  624  moves from its rest position clockwise or counterclockwise about the third axis ax 3 . At this time, at least a part of the rotary magnet  40  approaches the fixed magnet  45 , increasing the repulsive force therebetween. Accordingly, when an external force is removed, the rotary magnet  40  subject to the repulsive force of the fixed magnet  45 , returns to the initial opposing position ( FIG. 30 ). In concert with this movement, the pivoting member  624  holding the rotary magnet  40  and the connecting head  620  return in a reverse rotation to the rest position. 
     When the pivoting member  624  makes a rotational motion in the housing space  638 , its rotational range is limited within a specific angle. This is intended to limit the rotational range about the third axis ax 3  within a comfort range against inducing discomfort to the user when shaving, which serves as a stopper. The stopper function is offered in the present embodiment by causing the eccentric pivoting member  624  when rotating, to contact with the magnet housing portion  636 . However, the present disclosure is not limited thereto, and the stopper function may be well provided by other methods. 
       FIG. 31  is an exploded rear perspective view of a razor assembly  800  according to the eighth embodiment of the present disclosure as viewed from one side of the blade housing  10 . 
     The razor assembly according to the eighth embodiment of the present disclosure includes a razor cartridge including a shaving blade  5  and a blade housing  10 , a connecting head  720 , and a razor handle  730 . The shaving blade  5  has one end provided with a cutting edge, and the other end seated on a seat provided in the blade housing  10 . Here, the shaving blade  5  is housed in the blade housing  10  in the transverse direction d 1  perpendicular to the shaving direction. Further structure of the blade housing  10  is the same as that of  FIG. 1 , and redundant description will be omitted. 
     In  FIG. 31 , the connecting head  720  has its one end detachably coupled to the blade housing  10  at a back side thereof. Here, the blade housing  10  can rotate with respect to the one end of the connecting head, about the first axis ax 1  extending in parallel with the transverse direction d 1  in which the shaving blade  5  is housed. On the other hand, formed on the other end of the connecting head  720 , a central axis  729  is also joined to the razor handle  730  so as to be rotatable with respect to the rotation axis ax 3  perpendicular to the transverse direction d 1 . In addition, the third axis ax 3  is formed in a direction parallel to the longitudinal direction d 2 . 
     The razor handle  730  may be formed integrally as shown in  FIG. 31 , although it may be made of two longitudinal parts of receiving members. A pivoting member  724  is provided at the end of the central shaft  729 , and the pivoting member  724  is formed with a receiving recess  725 . The receiving recess  725  is formed in the same direction as the longitudinal direction d 1  to accommodate a rotary magnet  40 . The arrangement direction of the receiving recess  725  is merely exemplary, and the receiving recess  725  may be arranged in any one of the radial directions of the central shaft  729 . 
     When the central shaft  729  is coupled with the razor handle  730 , the pivoting member  724  is completely housed within the housing space of the razor handle  730 . Here, first and second fixed magnets  45 ,  47  are installed in magnet housing portions  736   a ,  736   b  respectively, so that the rotary magnet  40  is disposed when in the rest position between the first and second fixed magnets  45 ,  47  with a certain space maintained therebetween and in an opposing manner thereto. 
       FIG. 32A  and  FIG. 32B  are perspective and plan views showing the shape of the razor assembly  700  when the connecting head  720  is in the rest position.  FIG. 32C  a plan view showing the shape of the razor assembly  700  when the connecting head  720  is in the rotated position. Here, the interior of the housing space  738  has been made visible by removing a longitudinal part of the razor handle  730 . 
     As shown in  FIGS. 32A and 32B , in a rest position, a rotary magnet  40  is provided between the first fixed magnet  45  and the second fixed magnet  47  in an opposing manner to the transverse direction d 1 . Here, repulsive forces act both between the rotary magnet  40  and the first fixed magnet  45 , and between the rotary magnet  40  and the second fixed magnet  47 . In order to cause such all repulsive forces to be generated between two adjacent magnets among the three magnets  45 ,  40 ,  47 , this embodiment provides the polarity arrangement as illustrated in  FIG. 24 . 
     As shown in  FIG. 32C , as the connecting head  720  pivots about the third axis ax 3 , the pivoting member  724  rotates clockwise or counterclockwise from the rest position about to the third axis ax 3 . At this time, at least a part of the rotary magnet  40  comes close to the first fixed magnet  45  as well as to the second fixed magnet  47 , which accordingly increases both the repulsive force between the rotary magnet  40  and the first fixed magnet  45 , and the repulsive force between the rotary magnet  40  and the second fixed magnet  47 . Therefore, when an external force is removed, the rotary magnet  40  subject to the repulsive force of the first and second fixed magnets  45 ,  47 , returns to its initial the opposing position ( FIG. 32B ). Accordingly, the pivoting member  724  holding the rotary magnet  40  and the connecting head  720  follow suit in a reverse rotation to return to the rest position. 
     When the pivoting member  724  makes a rotational motion within the housing space  738 , the rotational range thereof is preferably limited within a specific angle. This is intended to limit the rotational range about the third axis ax 3  within a comfort range against inducing discomfort to the user when shaving, which serves as a stopper. Although not shown in  FIG. 31  to  FIG. 32C , this embodiment too can offer the stopper function in such form as in  FIG. 33 . As shown in  FIG. 33 , a plurality of protrusions  728   a ,  728   b  may be formed in the circumferential direction of the central shaft  729 . These protrusions  728   a ,  728   b  are accommodated in slot portions  737   a ,  737   b  which are formed in the razor handle  730  at the distal end portion thereof in the circumferential direction so as to correspond to the protrusions  728   a ,  728   b . This provides the stopper function that controls the rotational range of the central shaft  729  as defined by the restricted movement of the protrusions within the slots. 
     The razor assembly according to the above described embodiments has an advantage that it can reliably and stably provide the rotational movement about the rotation axis perpendicular to the axis parallel to the arrangement direction of the shaving blades. 
     Further, according to the razor assembly of the above described embodiments, shaving performance may be improved by the shaving blade smoothly adhering to the skin profile of the user. 
     Although exemplary embodiments of the present disclosure have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the idea and scope of the claimed invention. Therefore, exemplary embodiments of the present disclosure have been described for the sake of brevity and clarity. The scope of the technical idea of the present embodiments is not limited by the illustrations. Accordingly, one of ordinary skill would understand the scope of the claimed invention is not to be limited by the above explicitly described embodiments but by the claims and equivalents thereof