Press and methods for cutting and folding a safety razor to form a 2-blade system for a razor head, and assembly
Patent Information
- Authority / Receiving Office
- TW · TW
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2022-01-17
- Publication Date
- 2022-10-01
Smart Images
Figure TWG2TA000877396_001 
Figure TWG2TA000877396_002 
Figure TWG2TA000877396_003
Abstract
Description
[Previous Technology]
[0001] Razors (often referred to as safety razors) have been used for shaving for over a century. They typically utilize a replaceable double-edged safety razor blade, configured to allow a user to shave one side of the blade at a time, targeting the stubble of a single blade. These products have the advantage of using a replaceable blade, which is inexpensive compared to other alternatives, while providing less irritation and a shave similar to a straight razor. However, they have the disadvantage of requiring more skill and practice to achieve a safe and close shave in a multi-blade magazine-type razor design. Multi-blade razors with replaceable magazine blades are also widely used, with the number of cutting blades ranging from two to five. These razors have the advantage of requiring less skill and practice to use due to the geometry of their multi-blade design. Multi-blade razors have the disadvantage of being expensive due to their design complexity. Disposable razors and razors with replaceable blade cartridges are known to be discarded, and their plastic and metal parts eventually end up in landfills, thus creating a global waste management problem. [Summary of the Invention]
[0002] This document discloses a shaving head assembly comprising a front shaving head assembly and a rear shaving head assembly, a replaceable handle, and a blade loading device. This blade loading device provides the quality and economic advantages of a double-edged safety razor shave with the advantages of a multi-blade cartridge shave requiring less skill and practice. The two-piece shaving head design, combining this blade loading device with a standard double-edged safety razor blade (also referred to as a blade), safely breaks the blade into two parts while folding those parts into place to achieve a user-loadable and reusable double-blade cartridge razor head. For the action of loading a blade, the geometry of the front shaving head assembly acts as a punch and blade spacer, while the rear shaving head assembly acts as a die and blade holder. The blade loading device functions to align an unbroken double-edged safety razor blade and hold it in place during the breaking and loading actions. In some embodiments, the blade loading device can also function as a breaking device. The assembled front and rear shaving head components are positioned with the broken blades in a specific orientation and position to achieve an assembly that allows shaving to be performed simultaneously with both cutting edges of the double-edged safety shaving razor blade.
[0003] The non-exhaustive objectives of various embodiments of the present invention include: a. using a portion of a shaving head assembly as an assembly for breaking a double-edged safety razor blade into two pieces; b. using a pressure clamp as a separating tool to break the double-edged safety razor blade and then assembling the two broken pieces of the blade into a shaving head; c. using a shaving head assembly assembly as a braking pressure tool to break a double-edged safety razor blade into two pieces (in the configuration of a punch and die); d. using a shaving head assembly assembly and a breaking device together to break a double-edged safety razor blade into two pieces; e. to facilitate the breaking of a double-edged safety razor blade, a "knob" or "bending point" may be provided in a head assembly or in a pressure clamp; Ÿ a shaving head assembly having a clip design for holding one of the broken double-edged safety razor blades into two pieces; The double-edged safety razor blade is slightly off-center along its long axis, to a certain distance or percentage away from the center line. The distance off-center is related to the angle of attack (shaving angle) of the blade on the skin when in the operating position.
Implementation Method
[0064] Cross-reference to related applications
[0065] This application claims priority and benefit to U.S. Provisional Patent Application No. 63 / 138,434, filed January 16, 2021, entitled “Press and Methods for Cutting and Folding a Safety Razor to Form a 2-Blade System for a Razor Head, and Assembly,” and U.S. Provisional Patent Application No. 63 / 232,565, filed August 12, 2021, entitled “Press and Methods for Cutting and Folding a Safety Razor to Form a 2-Blade System for a Razor Head, and Assembly,” the entire contents of which are incorporated herein by reference.
[0066] Referring to Figures 1A to 1D, various views of the rear shaving head assembly 109 are shown. The rear shaving head assembly refers to the assembly attached to the handle of a razor. Generally, "rear" refers to an area or direction facing the handle, while "front" refers to an area or direction away from the handle facing a shaving interface with a user's skin. An angular positioning surface 114 is positioned normally in a handle insertion recess 111, thereby providing the operator with a visual cue for properly inserting one of several handle options. An undercut recess 112 is positioned to lock the handle into one of its operating positions via an insertion and retention mechanism shown in Figures 10A, 10B, and 11. Notch details 121 and 122 are relief details that interface with the front shaving head assembly 108 shown in Figures 2A to 2D. The front shaving head assembly refers to the component inserted into the rear shaving head assembly 109 when the shaving razor is loaded with one of the double-edged safety shaving blades 140 as shown in FIG. 14. The rear block 110 and the front block 113 form a slot 120 for multiple functions. First, the slot and its adjacent details can serve as a die side for a double-edged safety shaving blade breaking process. Second, the slot and its adjacent details can serve as an inlet or guide for inserting a double-edged safety shaving blade element and the front shaving head assembly 108 into their respective operating positions. Third, the slot and its corresponding details serve as a retaining detail for a double-edged safety shaving blade element 140, as shown in FIG. 14, and are positioned together with the front shaving head assembly 108 in their respective operating positions.
[0067] Referring now to Figures 2A to 2D, various views of the shaving head front assembly 108 are shown. A retaining guide and punch 117 serve as the punch side of a double-edged safety razor blade breaking procedure. It also serves as a positioning surface for the operating position of the double-edged safety razor blade elements and a spacer for controlling the space between the double-edged safety razor blade elements. Two double-edged safety razor blade element operating position stops 115 and 116 are positioned, as shown, to position the cutting edge of the blade elements relative to the blade guard side member 107, the blade guard front member 118, and the blade clearance member 119.
[0068] Referring now to Figures 3A to 3E and Figures 4A to 4B, a shaving head front assembly and a shaving head rear assembly without a double-edged safety razor blade element are shown. Interfacing surfaces are shown where the guide and punch 117 intersect with and rest in their respective operating positions (wherein they function to hold the blade element). Blade element operating position stops 115 and 116 intersect with notch details 121 and 122.
[0069] Referring now to Figures 5A to 5E and Figure 6, a shaving head front assembly and a shaving head rear assembly 108, 109 are shown assembled with a standard double-edged safety razor blade 140 broken in two halves. The double-edged safety razor blade 140 typically includes a slit pattern 154 similar to the slit pattern shown in Figure 4, but in other embodiments, the razor blade 140 may have a different longitudinal slit pattern or several patterns (e.g., multiple holes) passing through the central portion of the blade 140. The double-edged safety razor blade 140 includes a first sharp edge 155a and a second sharp edge 155b on opposite sides of the blade 140 (shown in Figure 14). The long half 123 and short half 124 of the safety razor, also referred to as blade elements or double-edged safety razor blade elements, are held by a blade groove 120 and a retaining guide and punch 117, respectively. A typical height (or width, as distinguished from length) of a conventional double-edged safety razor blade is 21.9 mm, which is the distance between the two blade edges. An example of the height h1 of the long half 123 (shown in Figure 14) is approximately 11.6 mm, and an example of the height h2 of the short half 124 is approximately 10.3 mm (if the blade breaks at approximately 52.5% / 47.5%), such that the sum of the heights of the long half 123 and the short half 124 (i.e., h1 + h2) substantially corresponds to the height H1 of a double-edged safety razor blade in an unbroken configuration (as seen in Figure 14), resulting in a shaving angle β of approximately 30 degrees (see Figure 24). Due to the slight bending that may occur at the breakage point, the heights h1 and h2 of the long and short halves 123 and 124 may be slightly smaller by a few millimeters compared to their unbroken form. In one alternative configuration, blade 140 can be precisely broken in half lengthwise (each half having a width of 50% / 50% compared to the original width), resulting in a 90-degree angle of attack β. In a further configuration, blade 140 can be broken at 53.5% / 46.5%, resulting in h1 = 11.75 mm and h2 = 10.15 mm, resulting in a shaving angle β of approximately 20 degrees. In yet another further configuration, blade 140 can be broken at 66% / 34%, resulting in h1 = 14.45 mm and h2 = 7.45 mm, resulting in an angle of attack β of approximately 5 degrees. Therefore, when blade 140 is broken into two parts, the first part can be between 50% and 66% of the entire original width of blade 140, and the second part can be correspondingly between 50% and 34%. The position and orientation of the blade elements relative to the handle interface surface 114, as well as the blade guard and blade clearance details, control their proximity to the skin and the intensity of shaving. A variation of this embodiment changes the angle of attack β of the two blade elements relative to the skin from approximately 5 degrees to approximately 30 degrees.
[0070] Referring now to Figures 7A to 7C, examples of shaving head front and rear assemblies 108 and 109 with handle designs are shown. The blade interface 128 is a common detail used to position the assembled shaving head 129 at one of the most ergonomic angles of attack for different areas of the body. The blade interface 128 allows for the universal use of the shaving head assembly 129 on any future handle design, which has the property of changing the angle of the shaving head assembly while holding it in your hand. Figure 7A illustrates a straight, conventional handle 125 for general purposes, where the operator has more shaving angle controls than other options. Figure 7B illustrates a curved handle 126 specifically designed for shaving the face. Figure 7C illustrates an ergonomic handle specifically designed for shaving the legs, with a sharper angle relative to the shaving head assembly 129.
[0071] Referring now to Figures 8A to 8B and 9A to 9B, examples of shaving head front and rear assemblies assembled with a specific final operating position (such as handles 126 and 127) are shown. Handle interface detail 130 is locked into the operating position shown in Figures 8A and 9A. Handle interface detail 130 and handles 126 and 127 are rotated 90 degrees relative to the assembly head 129 about a concentric axial receiving recess 135 for inserting or removing the handles.
[0072] Referring now to Figures 10A and 10B, one embodiment of a straight conventional handle 125 with interface details is shown, which includes a handle interface axial tube 131 with a directional protruding detail 132 and a spring-loaded plunger 133.
[0073] Referring now to FIG11, a cross-sectional detail of one embodiment of the interface detail shown in FIG10 is displayed. The interface axial tube 131 is pressed into a recess in the handle 125. The interface axial tube 131 includes an undercut detail that captures the plunger 133 in its extended position when a compression spring 134 is applied. In addition, a protruding detail 132 is shown protruding from one side of the interface axial tube 131.
[0074] Referring now to Figures 12A and 12B, the connecting details on the rear side of the shaving head assembly of the operating assembly are shown from the handle insertion side. An axial receiving recess 135 interfaces with an axial tube 131, wherein a protruding detail 132 aligns with an indexing recess 136. The handle 125 and interface details 131, 132, 133, and 134 are pressed downwards into the axial receiving recess 135 until the protruding detail is below the undercut surface 137 of the interface locking recess 112. This movement presses the plunger inwards, thereby loading the compression spring 134. The handle 125, now under tension, rotates 90 degrees about an axis concentric with the axial receiving recess 135 until the protruding detail 132 reaches the side of the interface locking recess 112 and touches the bottom. The loaded compression spring 134, which is pressed against the plunger 133, pushes the handle 125 outward along the bottom of the connecting interface recess 111 and pushes the protruding part 132 into the positioning part stop 138, thereby holding the protruding part 132 in the operating position under tension.
[0075] Referring now to Figures 13A and 13B, the undercut details of the shaving head assembly (rear) side of the operating assembly are shown from the normal direction to the bottom of the interface locking recess.
[0076] Referring now to FIG. 14, an embodiment of a blade breaking assembly, referred to as a manual blade holding block 139, is shown from top, in which a standard double-edged safety razor blade 140 rests in its initial position. The manual blade holding block 139 is configured to hold an uncut standard double-edged safety razor blade 140 in a fixed position while the blade 140 is broken to form a double-blade razor head. The bending and breaking centerline 141 is located at the center between the bend points 143. The position of the centerline 141 relative to the midpoint between the two cutting surfaces of the blade 140 will have a direct influence on the blade's offset, angle of attack β, and alignment in its operating position. The blade's initial position and the bending and breaking centerline will change to achieve an operating angle range between 5 degrees and 30 degrees.
[0077] Referring now to FIG15A, an embodiment of a blade breaking assembly, referred to as a manual blade holding block 139, is shown from the side, wherein a standard double-edged safety razor blade 140 rests in its starting position. A shaving head front assembly 108 is positioned in its starting position for blade breaking. This position centers the upper holding guide and punch 117 above the centerline 141 of the bent and broken blade. A length L1 of a first tilting guide 142a differs from a length L2 of a second tilting guide 142b. Example dimensions of L1 and L2 are 11.3 mm (0.445 inches) (L1=L2). The first tilting guide surface 142a has a first end and a second end, and the second tilting guide surface 142b also has a corresponding first end and a second end. The second ends of the first inclined guide surface 142a and the second ends of the second inclined guide surface 142b converge to form a channel 151 (as seen in FIG. 15B) below the second ends of the first inclined guide surface 142a and the second inclined guide surface 142b. An angle α formed by the first inclined guide surface 142a and the second inclined guide surface 142b is between 75 degrees and 120 degrees, or between 45 degrees and 179 degrees, or approximately 84 degrees to 96 degrees. The channel 151 has relatively parallel surfaces 152a and 152b orthogonal to a plane defined by the first ends of the first inclined guide surface 142a and the second inclined guide surface 142b. The channel is eccentrically positioned relative to a midpoint between the first end of the first inclined guide surface 142a and the first end of the second inclined guide surface 142b (see Figure 14), such that the lengths L1 and L2 between the first and second ends of the first inclined guide surface 142a and the first and second ends of the second inclined guide surface 142b are not equal.
[0078] Registration members 153a, 153b, 153c, 154d (as seen in FIG14) are configured relative to the first inclined guide surface 142a and the second inclined guide surface 142b to receive a double-edged safety razor blade 140 across an opening 149 formed by the inclined guide surfaces 142a, 142b (shown in FIG15A).
[0079] Now continuing with Figure 16, it is shown that the front assembly 108 of the shaving head moves downward and presses down on the double-edged safety razor blade 140 until it reaches a bent position against one of the blade bending guide surfaces 142 of the manual blade holding block 139.
[0080] Continuing with Figure 17, the front shaving head assembly 108 is shown moving past or beyond the depressor inflection point and breaking the double-edged safety razor blade into blade elements 123 and 124, i.e., a long side 123 and a short side 124. This action also involves a rotational movement that holds the guide and punch 117 upward and rests directly below their operating positions to engage the blade elements. This is the position where the blade breaking process ends when using the manual brake embodiment of the invention. In this embodiment, the front shaving head assembly with the blade elements must be manually inserted into the rear shaving head assembly, as shown in its final position in Figure 24. In other embodiments, the blade breaking process can be implemented using an automatic braking device so that the operator does not contact the safety blade when it is broken into two pieces and secured in the head assembly.
[0081] Continuing with Figures 18A and 18B, an alternative embodiment of a blade breaking and alignment assembly, referred to as an automatic blade holding block, is shown at the same blade breakage position as in Figure 17. In this embodiment, there are separate clamping blocks: a long-side block or set of blocks 144 and a short-side block or set of blocks 145. The geometry of the pre-breakage step is the same as in the manual embodiment, and Figure 18 shows the automatic clamping device at the post-breakage step. The long block 144 and the short block 145 serve both as a punch side for a mechanism for breaking and as retainers for the long side 123 and short side 124 of the razor blade passing through the additional unsupported portion of the insertion process. A detailed view, Figure 18B, details the resulting broken razor tip. After being broken, the normally hardened steel blade element will remain in a slightly bent deformation residing directly below the retaining guide and punch 117. The rear assembly 109 of the shaving head is positioned below the bend point 143, wherein the blade groove 120 is located at the center of the retaining guide and the punch 117.
[0082] Continuing with Figure 19A, an embodiment of an automatic blade holding block is shown, wherein the blade continues downward toward the blade slot 120 of the shaving head rear assembly. In this position, the short side 145 and long side 144 of the block abut against a braking die and a holding guide and punch 117 to hold the broken blade element. Figure 19B illustrates a detailed view showing pressure from the short and long sides of the block causing the long and short blade halves to move upward relative to the holding guide and punch 117 at the front of the shaving head, wherein the two blade elements stop abutting against operating position stops 115 and 116.
[0083] Now continuing with Figure 20, a blade is shown in the same position as shown in Figure 19, wherein the long side 144 of the automatic pressing block slides away from the head, thereby transferring the holding function of the blade element from this block to the lower braking die and blade groove 120 behind the shaving head.
[0084] Now continuing with Figures 20 and 21, it is shown that while the short half 124 of the blade is held in place by the short side 145 of the pressure block, the blade element moves downward toward the front of the blade groove 120.
[0085] Now continuing with Figure 22, a blade is shown in the same position as in Figure 21, wherein the short side 145 of the automatic pressure block slides away from the head, thereby transferring the blade holding function to the lower braking die and blade groove 120 behind the shaving head.
[0086] Referring to Figure 23, the blade element and the front assembly of the shaving head are shown moving downward to their final operating positions.
[0087] Referring to Figure 24, a detailed view of the head assembly with blades is shown. The broken razor tip detail 147 has been pressed downward into the blade groove 120. The shape obtained from the broken, normally hardened steel double-edged safety razor blade acts as a spring steel abutting against the blade groove 120 and retaining the guide and punch 117. This pressure is used to hold the front and rear razor head assemblies together in their operating states.
[0088] Referring to Figures 25, 26 and 27, an alternative embodiment of an automatic blade breaking method is shown, which uses only the front shaving head assembly 108 and the rear shaving head assembly 109 for one of the functions of blade positioning, blade breaking and blade insertion.
[0089] Referring to Figures 28A to 28C, 29A to 29B, and 30A to 30B, an alternative embodiment of an automatic blade breaking method is shown, in which the front shaving head assembly 108 and the rear shaving head assembly 109 are used for blade breaking and insertion functions, while a separate blade alignment assembly 159 is used for blade positioning and alignment. A pressure block 159 has one or more registration members 160 configured to hold the double-edged safety razor blade in its original, flat, unbroken, and unbent form 140 relative to the pressure block 159. For example, the registration member 160 may be a recess formed by a vertical wall or several segmented vertical walls that are aligned with the two cutting edges of the double-edged safety razor blade to align the blade in the short axis direction. The registration component 160 may also include one or more vertical walls or segments aligned with and perpendicular to the cutting edge of the double-edged safety razor blade on both sides for alignment of the blade along its long axis. The depressor block 159 includes a conformal recess 161 configured to comfortably receive the rear shaving head assembly 109 to hold it in a fixed position, while movement of the front shaving head assembly 108 toward the rear shaving head assembly 109 breaks the double-edged safety razor blade 140 into two components, as shown in Figures 29 and 30. The inclined guide surface 142 and the depressor block forming angle α are integrated into the rear shaving head assembly 109 (refer to Figure 15B). The bend point 143 is integrated into the rear shaving head assembly 109. As the shaving head front assembly 108 and the unbroken double-edged safety razor blade 140 move past the turning point 143, the blade breaks and rotates relative to the shaving head front assembly 108 into its operating position. As the shaving head front assembly continues to descend into its operating position, the long half 123 and the short half 124 of the safety razor are held in place by the blade groove 120 and the blade retaining guide and punch 117.
[0090] Referring to Figures 31A to 31C, an alternative embodiment of the shaving head rear assembly 109' is shown, wherein a vertical positioning tab 162 is added to the handle side of the shaving head rear assembly 109'. The vertical positioning tab 162 is formed on a surface parallel to one of the long axes of the blade groove 120.
[0091] Referring to Figures 32A to 32C, an alternative embodiment of a pressure block 159' is shown, which has the same razor blade and shaving head rear assembly retaining member as found in Figures 28A to 2C, 29A to 29B, and 30A to 30B, and adds a pressure block protrusion 163, which is positioned to stabilize the pressure block 159' while the shaving head rear assembly 109' and handle are mounted on the pressure block 159'. An alternative embodiment of a registration member 166 is also shown, wherein a draft is added to the vertical surface of the registration member 166.
[0092] Referring to Figures 33 and 34, a pressure block 159' is shown as an alternative embodiment of the shaving head rear assembly 109', wherein the vertical positioning tab 162 is in the pre-blade loading position. The bottom surface 165 of the pressure block head retaining groove serves as a base plate for one of the horizontal surfaces 164 of the shaving head rear assembly. Although the bottom surface 165 of the pressure block head retaining groove coincides with the horizontal surface 164 of the shaving head rear assembly, the vertical positioning tab 162 is parallel to and coincides with the vertical surface 162 of the pressure block head retaining groove, thereby resulting in the shaving head rear assembly 109' being held in an accurate pre-blade loading position.
[0093] Referring to Figures 35A to 35C, an alternative embodiment of a razor blade and shaving head rear assembly retaining member with a pressure block 171 having the same pressure block 159 as found in Figures 28A to 2C, 29A to 29B, and 30A to 30B is shown. The pressure block 171 includes the addition of guide pins 168, which are made of a material different from that of the pressure block 171 and the shaving head front retaining ring 172, such that the difference in material facilitates the registration of the pressure block 171 relative to the shaving head front alignment assembly 172.
[0094] Referring to Figures 36A and 36B, a shaving head front alignment assembly 172 is shown, wherein the guide rail detail 169 is integrated into the front alignment assembly 172. There is also a shaving head front retaining detail or recess 170 for properly aligning the shaving head front 177 (see Figure 38A) for blade loading.
[0095] Referring to Figure 37A, a shaving head front assembly alignment ring 172 is shown, having been held in a pre-loaded temporary position by the shaving head front assembly 177, wherein the guide rail detail 169 is aligned above the guide pin 168 in the retaining pressure block 171 after integration into the shaving head. The shaving head front alignment assembly 172 is configured to be manually pushed toward the pressure block 171 in a downward direction (e.g., parallel to gravity when placed on a horizontal surface relative to the earth) by aligning the guide pin 168 and the corresponding guide rail detail 169. This ensures a continuous, straight downward movement without wobbling or misalignment so that new blades 140 are consistently snapped into the same position on the shaving head front assembly 177, even after repeated use.
[0096] Referring to FIG37B, a shaving head front assembly alignment assembly 172 is shown having a shaving head front assembly 177 held in one of the loading positions, wherein the guide rail detail 169 engages with the guide pin 168.
[0097] Referring to Figures 38A-38B and 39A-39C, an alternative embodiment of a shaving head front assembly 177 is shown, which can be used in conjunction with any shaving head rear assembly 109 and pressure block 159 disclosed herein. The shaving head front assembly 177 retains all components from the shaving head front assembly 108 by adding a punch (see Figures 2A-2D) and a retaining guide 178, which is a multi-thickness retaining guide along its length. The break-off thickness 173 towards the thinner blade of the blade 140 is optimized to cleanly break off a standard double-edged safety razor blade 140. The thicker blade retainer portion 174 of one of the front components of the shaving head (exposed during installation) is optimized to retain a standard double-edged safety razor blade 140 by controlling the clearance between the retaining guide and punch 178, the blade groove 120, the long half 123 of the safety razor, and the short half 124 of the safety razor to an optimal size. This ensures that the safety razor blade front component 177 is retained when the razor is loaded and ready for shaving. Example dimensions are as follows: the thicker portion 174 can be 0.0265 + / - 0.0005 inches, and the thinner portion 173 can be 0.0225 + / - 0.0005 inches. These dimensions are relative to the rear groove 120 of the shaving head, which in this example is 0.035 + / - 0.0005 inches. The clearance between the thicker section and the rear groove is important for retaining the blade. A blade movement limiting component is integrated into the blade break-off edge 175. This component can be achieved, depending on the application, with a different finish or by adding a different coating or material that generates additional friction between the blade break-off edge 175 and a standard double-edged safety razor blade 140. The additional friction generated between these two components reduces or eliminates the tendency of a standard double-edged safety razor blade 140 to move in any direction parallel to the surface of the break-off edge 175. Movement in any direction parallel to the surface of the break-off edge 175 during the blade loading process may result in inaccurate and improper loading of the final loading position of the long half 123 and the short half 124 of the safety razor.
[0098] Referring to Figures 41A to 41C, a shaving head front assembly 177 with an added blade retainer is shown, which can be used in conjunction with any of the pressure blocks 159 disclosed above. A blade retainer 179 is shown to be overmolded at two locations on the shaving head front assembly 177 using the cross-sectional shape of two countersunk through-holes 180 (see Figure 38A) on both sides for retention. The retainer 179 is made of a material different from that of a standard double-edged safety razor blade and the shaving head front assembly 177, which has the effect of introducing additional friction to a standard double-edged safety razor blade. In addition, the blade retainer may be made of a flexible material, thereby allowing the blade retainer to compress when the razor is loaded (see Figure 39C). Once compressed, the blade retaining member 179 generates greater tension between the retaining guide and punch 178, blade groove 120, the long half 123 of the safety razor, and the short half 124 of the safety razor, thereby holding all parts together while the razor is used for shaving. In an alternative configuration, the shape of these retaining members can be any shape when viewed from the axial direction of the through-hole 180, but they must be maintained at an optimal height above the surrounding surface. [Simplified Explanation of the Diagram]
[0004] Figure 1A is a front view of one of the rear components of the shaving head.
[0005] Figure 1B is a top view of one of the rear components of the shaving head.
[0006] Figure 1C is a rear view of one of the rear components of the shaving head.
[0007] Figure 1D is a right-side view of one of the rear components of the shaving head.
[0008] Figure 2A is a top view of one of the front components of the shaving head.
[0009] Figure 2B is a front view of one of the front components of the shaving head.
[0010] Figure 2C is a right-side view of one of the front components of the shaving head.
[0011] Figure 2D is a cross-sectional view of one of the front components of the shaving head.
[0012] Figure 3A is a front view of one of the front and rear shaving head components of the shaving head without the double-edged safety shaving blades assembled.
[0013] Figure 3B is a left-side view of one of the front and rear shaving head components of the shaving head without the double-edged safety shaving blades assembled.
[0014] Figure 3C is a top view of one of the front and rear shaving head components of the shaving head without the double-edged safety shaving blades assembled.
[0015] Figure 3D is a cross-sectional view of the front and rear shaving head components of the shaving head without the double-edged safety shaving blades assembled.
[0016] Figure 3E is a rear view of one of the front and rear shaving head components without a blade assembled.
[0017] Figure 4A is an isometric bottom side view of one of the front and rear shaving head components of the shaving head without the double-edged safety shaving blade element assembled.
[0018] Figure 4B is an isometric top-side view of one of the front and rear shaving head components of the shaving head without the double-edged safety shaving blade element assembled.
[0019] Figure 5A is a front view of one of the front and rear shaving head assemblies of a shaving head with a double-edged safety shaving blade component.
[0020] Figure 5B is a left-side view of one of the front and rear shaving head components of a shaving head assembled with a double-edged safety shaving blade element.
[0021] Figure 5C is a top view of one of the front and rear shaving head assemblies of a double-edged safety razor blade assembly.
[0022] Figure 5D is a cross-sectional view of the front and rear shaving head components of a shaving head assembled with a double-edged safety shaving blade element.
[0023] Figure 5E is a rear view of one of the front and rear shaving head assemblies of a double-edged safety razor blade assembly.
[0024] Figure 6 is an isometric front view of one of the front and rear shaving head components of a shaving head assembled with a double-edged safety shaving blade element.
[0025] Figure 7A is a side view of one of the front and rear components of a shaving head assembled with a straight handle.
[0026] Figure 7B is a side view of a shaving head front assembly and a shaving head rear assembly assembled with an angled curved handle for shaving.
[0027] Figure 7C is a side view of a shaving head front assembly and a shaving head rear assembly assembled with an angled curved handle for shaving legs.
[0028] Figure 8A is a top view of a front shaving head assembly and a rear shaving head assembly with an angled curved handle positioned in its connection and operation position for shaving.
[0029] Figure 8B is a top view of a front and rear shaving head assembly with a curved handle that is angled for shaving, rotated 90 degrees around the handle connection interface axis and aligned with the insertion details of the shaving head.
[0030] Figure 9A is a front isometric view of one of the front and rear shaving head assemblies of a shaving head with an angled curved handle positioned in its connection and operation position for shaving legs.
[0031] Figure 9B is a front isometric view of one of the shaving head front assembly and shaving head rear assembly, which are assembled with a curved handle that is angled for shaving legs, rotates 90 degrees around the connecting shaft, and is aligned with the insertion part of the shaving head.
[0032] Figure 10A is a top view of one of the details of the connection between the straight handle and the head assembly.
[0033] Figure 10B is a side view of one of the details of the connection between the straight handle and the head assembly.
[0034] Figure 11 is a cross-sectional view of a straight handle with a head assembly connection mechanism.
[0035] Figure 12A is a view of the handle connection interface axis on the rear assembly of the shaving head.
[0036] Figure 12B is a detailed view of the hidden line of the handle connection interface axis normal to the rear assembly of the shaving head.
[0037] Figure 13A is a view of the locking recess of the handle connection interface on the rear assembly of the shaving head.
[0038] Figure 13B is a detailed view of a hidden line of a handle connection interface locking recess normal to the rear assembly of the shaving head.
[0039] Figure 14 is a top view of a manual brake pressure block for one of the double-edged safety razor blades set to the starting position.
[0040] Figure 15A is a side view of a manual brake block of a double-edged safety razor blade set to the starting position and a cross-sectional view of the front assembly of the razor head in its starting position.
[0041] Figure 15B is an enlarged view of the lower part of one of the manual brake pressure blocks shown in Figure 15A.
[0042] Figure 16 is a side view of a manual brake press block and a cross-sectional view of the outline of the front shaving head assembly abutting against the manual brake press, pressing the double-edged safety razor blade into a bent position.
[0043] Figure 17 is a side view of a manual brake pressing block and a cross-sectional view of the center outline of the front shaving head assembly abutting against the manual brake pressing device, pressing the double-edged safety razor blade to the breakage position.
[0044] Figure 18A is a side view of the automatic braking depressor block and a cross-sectional view of the front shaving head assembly in the broken position of the double-edged safety razor blade and the rear shaving head assembly in the receiving position.
[0045] Figure 18B is a side view of the automatic braking pressure block and a close-up of a cross-sectional view of the front shaving head assembly in the broken position of the double-edged safety razor blade and the rear shaving head assembly in the receiving position.
[0046] Figure 19A is a side view of one of the automatic braking pressure blocks and a cross-sectional view of one of the front shaving head components positioned directly above the insertion position of the double-edged safety shaving blade element in the rear shaving head assembly, wherein the double-edged safety shaving blade element slides upward to its operating position.
[0047] Figure 19B is a side view of the automatic braking pressure block and a close-up cross-sectional view of the front shaving head assembly positioned directly above the insertion position of the double-edged safety razor blade element in the rear shaving head assembly, wherein the double-edged safety razor blade element slides upward to its operating position.
[0048] Figure 20 is a side view of one of the automatic braking pressure blocks and a cross-sectional view of one of the shaving head front components after the double-edged safety razor blade element is inserted into the rear shaving head assembly, wherein the double-edged safety razor blade element slides upward to its operating position and the rear braking pressure block moves away from the head.
[0049] Figure 21 is a side view of one of the automatic braking pressure blocks and a cross-sectional view of one of the shaving head front components, which is positioned after the double-edged safety razor blade element is inserted into the shaving head rear assembly, wherein the double-edged safety razor blade portion slides upward to its operating position.
[0050] Figure 22 is a side view of one of the automatic braking pressure blocks and a cross-sectional view of one of the shaving head front components, which is positioned after the double-edged safety razor blade element has been inserted into the rear shaving head assembly, wherein the double-edged safety razor blade element slides upward to its operating position and the front braking pressure block moves away from the head.
[0051] Figure 23 is a side view of one of the automatic braking pressure blocks and a cross-sectional view of one of the front shaving head components positioned in the final operating insertion position of the double-edged safety razor blade element in the rear shaving head assembly, wherein the double-edged safety razor blade element slides upward to its operating position and the front and rear braking pressure blocks move away from the head.
[0052] Figure 24 is a side view of one of the automatic braking pressure blocks and a cross-sectional view of one of the front shaving head components, which is positioned in the final operating insertion position of the double-edged safety razor blade element in the rear shaving head assembly, wherein the double-edged safety razor blade element slides upward to its operating position.
[0053] Figures 25, 26 and 27 show an alternative embodiment of a double-edged safety razor blade breaking method and device that uses only the front and rear shaving head components for one of the blade positioning, breaking and insertion functions of all double-edged safety razors.
[0054] Figures 28, 28A to 28C, 29, 29A to 29B and 30, 30A to 30B show an alternative embodiment of a double-edged safety razor blade breaking method and apparatus, in which a front razor head assembly and a rear razor head assembly are used for the double-edged safety razor blade breaking and insertion function, and a separate double-edged safety razor blade alignment assembly is used for the positioning and alignment of the double-edged safety razor blade.
[0055] Figures 31A to 31C show an alternative embodiment of a shaving head assembly, which is added to the handle side of the assembly to form a protruding shape of a vertical surface.
[0056] Figures 32A to 32C show one alternative embodiment of a separate double-edged safety razor blade alignment assembly.
[0057] Figure 33 shows, from a top view, one alternative embodiment of a double-edged safety razor blade alignment assembly in which the shaving head rear assembly and handle are positioned in a pre-loaded resting position.
[0058] Figure 34 shows an alternative embodiment of a double-edged safety razor blade alignment assembly in which the shaving head rear assembly and handle are positioned in a pre-loaded stationary position.
[0059] Figures 35A to 35C show one alternative embodiment of a separate double-edged safety razor blade and a shaving head alignment assembly.
[0060] Figures 36A and 36B show a top view and an isometric view of one of the components of a shaving head front assembly alignment assembly.
[0061] Figures 37A and 37B show an alternative embodiment of a separate double-edged safety razor blade and a razor head rear alignment assembly that interfaces with a razor head front assembly alignment assembly on which a razor head front assembly is mounted. When used together, the assembly reduces the amount of blade breakage and loading variation between the razor head front assembly and the razor head rear assembly.
[0062] Figures 38A to 38B and Figures 39A to 39C show an alternative embodiment of a shaving head front assembly having separate blade break-off and blade holding features and one of different materials or finishes.
[0063] Figures 40A to 40B and Figures 41A to 41C show an alternative embodiment of a shaving head front assembly with an additional retaining component of a different material and hardness.
Claims
1. A blade breaking assembly, comprising: A first inclined guide surface having a first end and a second end, and a second inclined guide surface having a first end and a second end, wherein the first end of the first inclined guide surface and the first end of the second inclined guide surface form an opening, and the second end of the first inclined guide surface and the second end of the second inclined guide surface converge to form a channel below the second end of the first inclined guide surface and the second inclined guide surface, wherein an angle formed by the first inclined guide surface and the second inclined guide surface is between approximately 45 degrees and 179 degrees, and the channel has relatively parallel surfaces orthogonal to a plane defined by the opening, and the channel is eccentrically positioned relative to a midpoint between the first end of the first inclined guide surface and the first end of the second inclined guide surface.
2. The blade breaking assembly of claim 1, wherein the angle is between 84 degrees and 96 degrees, the assembly further includes a plurality of registration members configured relative to the first and second inclined guide surfaces to receive a double-edged safety razor blade across an opening defined by the first and second inclined guide surfaces.
3. The blade breaking assembly of claim 1, further comprising a plurality of guide pins disposed outside the channel and extending above the first inclined guide surface and the second inclined guide surface.
4. The blade breaking assembly of claim 1, which is combined with a pressure block comprising a plurality of guide pins disposed outside the channel, and combined with a shaving head front assembly alignment assembly, the alignment assembly further comprising a plurality of recesses configured to receive the counterparts of the plurality of guide pins therein in response to the alignment assembly being received in the pressure block.
5. The blade breaking assembly as claimed in claim 4, wherein the plurality of guide pins are made of a material different from that of the pressure block to facilitate their alignment with the alignment assembly.
6. A razor head, comprising: A front assembly having a retaining guide, a first position stop, and a second position stop offset from the first position stop by a distance; and a rear assembly having a blade slot configured to receive a first blade portion and a second blade portion formed by breaking off a double-edged safety razor blade, such that the first blade portion and the second blade portion have different widths, the retaining guide being configured to retain the first blade portion and the second blade portion in the blade slot in response to at least partial insertion of the retaining guide into the blade slot.
7. As in claim 6, the retaining guide has a thickness along one of its length, such that the thickness of the retaining guide thins toward the razor blade to cleanly break the double-edged safety razor blade.
8. The shaving head of claim 6, combined with the double-edged safety razor blade having a first sharp edge and a second sharp edge, the first sharp edge extending beyond the second sharp edge along a plane parallel to the main surfaces of the first blade portion and the second blade portion, such that the first sharp edge and the second sharp edge form a shaving angle between 5 degrees and 30 degrees.
9. The shaving head of claim 6, wherein the rear assembly includes a bend point and a first inclined guide surface on a first side of an opening adjacent to the blade groove and a second inclined guide surface on a second side of the opening opposite to the first side, the first inclined guide surface and the second inclined guide surface being formed at an angle between 45 degrees and 179 degrees.
10. The shaving head of claim 9, combined with a retaining block having a conformal recess configured to receive the rear component therein, the retaining block including a registration member configured to hold the double-edged safety razor blade in a non-breakable manner relative to the retaining block.
11. The blade break-off assembly of claim 1, which is combined with the shaving head of claim 6.
12. The blade break-off assembly of claim 1, which is combined with the shaving head of claim 7.
13. The blade break-off assembly of claim 1, which is combined with the shaving head of claim 8.
14. The shaving head of claim 6, which is combined with the blade break-off assembly of claim 1 and / or with the double-edged safety razor blade of claim 8.
15. The blade breaking assembly of claim 4, which is combined with the shaving head assembly of claim 6.