JP6803705B2 - Electric razor - Google Patents

Description

The present invention relates to an electric razor including a cylindrical fixed blade and a rotary driven movable blade.

This type of electric razor is disclosed in, for example, Patent Document 1. In the electric razor of Patent Document 1, a cylindrical net-like outer blade (fixed blade) is provided on the upper part of the main body case, and an inner blade (movable blade) that is rotationally driven is provided inside the net-like outer blade. The inner blade has a support structure of a pair of end plates and intermediate plates fixed above and below the rotation axis, and two rectangular inner blade pieces are mounted around the end plates and intermediate plates, and the pair of ends. Each inner blade piece is pressed against the mesh outer blade by a leaf spring piece mounted on the facing surface of the plate. When the switch provided on the main body case is turned on, the motor is activated and the inner blade is rotationally driven, and the whiskers that have entered through the blade holes of the mesh outer blade can be cut by the inner blade.

Jikkai Sho 56-54068 (page 2, line 12 to page 4, line 6, Fig. 2)

According to the electric razor of Patent Document 1, since the net-like outer blade is held in a cylindrical shape, whiskers can be cut on an arbitrary peripheral surface of the net-like outer blade. However, the hair dust accumulated inside the reticulated outer blade is blown off by the inner blade piece and scattered to the outside of the reticulated outer blade. For example, when the net-like outer blade is pressed against the skin surface in a sideways posture, the hair debris accumulated at the bottom of the inner surface of the net-like outer blade moves to the rotation region of the inner blade piece, so that a large amount of hair is reticulated. It scatters out of the outer blade and adheres to the skin surface. The only way to prevent such hair dust from scattering is to remove the reticulated outer blade from the main body case after each shaving and clean the hair debris accumulated inside the reticulated outer blade, but it takes time and effort to clean. troublesome.

An object of the present invention is to provide an electric razor that can hold hair that has been cut by a movable blade and prevent the hair from scattering out of the fixed blade, thus allowing shaving in a hygienic condition at all times. To do.

The electric razor according to the present invention includes a main body case 1 and a razor head 2 supported by the main body case 1. The razor head 2 is provided with a movable blade 14 and a fixed blade 15 surrounding the movable blade 14. As shown in FIG. 1, the movable blade 14 includes a movable blade shaft 18 that is rotationally driven, and a small blade 19 that is mounted around the movable blade shaft 18. A hair dust accumulating portion 27 that stores hair cut by the small blade 19 between the tip of the small blade 19 that is in sliding contact with the fixed blade 15 and the mounting base end 19a of the small blade 19 that is fixed to the movable blade shaft 18. It is characterized by forming a dent. The fixed blade 15 that surrounds the circumference of the movable blade 14 includes a case where the fixed blade 15 surrounds the entire circumference of the movable blade 14 and a case where the fixed blade 15 surrounds a part of the circumference of the movable blade 14.

The mounting base end 19a of the small blade 19 fixed to the movable blade shaft 18 is formed on a plane along the tangent line T of the peripheral surface of the movable blade shaft 18.

Assuming a virtual reference line Q that is orthogonal to the tangent line T of the peripheral surface of the movable blade shaft 18 and passes through the contact point of the tangent line T, the hair dust accumulating portion 27 is on the better side of the movable blade 14 in the rotation direction than the virtual reference line Q. It is formed by a curved surface that is recessed.

The tip of the small blade 19 is projected from the virtual reference line Q toward the lower side in the rotation direction of the movable blade 14.

The small blade 19 is fixed from one end to the other end of the movable blade shaft 18. The hair dust accumulating portion 27 is inclined from one end side to the other end side of the movable blade shaft 18.

As shown in FIG. 5, the tip of the small blade 19 is provided parallel to the axis of the movable blade shaft 18. The cutting edge 25 provided at the tip of the small blade 19 is formed into a continuous waveform.

An opening 26 is formed in the small blade wall continuous with the cutting edge of the small blade 19. A cutting edge 28 is formed on the opening edge of the opening 26 on the side of the hair dust accumulating portion 27.

The opening 26 is tilted with respect to the axis of the movable blade shaft 18, and the cutting edge 28 formed on the opening edge of the opening 26 is tilted with respect to the axis of the movable blade shaft 18.

Cutting blades 25 and 28 are formed at the tip of the small blade 19 and the opening edge of the opening 26 on the side of the hair dust accumulating portion 27, respectively.

The cutting edge angle θ1 of the cutting edge 25 provided at the tip of the small blade 19 is set to be larger than the cutting edge angle θ2 of the cutting edge 28 formed in the opening 26 (see FIG. 1).

A movable blade 14 is provided inside the fixed blade 15 formed in a cylindrical shape. A cutting region having a cutting blade 44 and a blade hole 45 is provided on the entire peripheral surface of the fixed blade 15.

The razor head 2 is arranged on the extension of the axis P of the main body case 1 that also serves as a grip, and the fixed blade 15 is formed in a long cylindrical shape in the axial direction. A plurality of cutting regions having different formation patterns of the cutting blade 44 and the blade hole 45 are provided in the circumferential direction of the peripheral surface of the fixed blade 15.

As shown in FIGS. 6 and 7, the cutting region includes a short hair cutting region Z1 that mainly cuts short hair and a stump hair cutting region Z2 that mainly cuts stump hair shorter than the short hair.

The cutting region includes a short hair cutting region Z1 that mainly cuts short hair, a stump hair cutting region Z2 that mainly cuts stump hair shorter than the short hair, and a long hair cutting region Z3 that mainly cuts curly hair and long hair. I have.

On the peripheral surface of the fixed blade 15 formed in a cylindrical shape, a plurality of cutting regions having different formation patterns of the cutting blade 44 and the blade hole 45 are provided over the entire circumference of the fixed blade 15. The cutting region includes a short hair cutting region Z1 that mainly cuts short hair and a long hair cutting region Z3 that mainly cuts curly hair and long hair. As shown in FIG. 14, the long hair cutting region Z3 is formed at one end of the fixed blade 15 in the axial direction, and the short hair cutting region Z1 is formed on the peripheral surface of the remaining fixed blade 15.

As shown in FIG. 3, a reinforcing ring 43 for reinforcing the blade body 42 is provided at at least one end of the fixed blade 15 in the axial direction of the blade body 42.

The reinforcing ring 43 is made of a plastic molded product. The blade body 42 is insert-fixed to the reinforcing ring 43.

As shown in FIG. 11, a reinforcing portion 80 that bends in the radial direction is formed at at least one end in the axial direction of the fixed blade 15.

As shown in FIG. 3, at one end of the main body case 1, a movable blade support shaft 16 projecting inside the razor head 2 along the axis P of the case 1 is provided. The movable blade shaft 18 of the movable blade 14 is formed in a hollow tubular shape, and is rotatably supported by the movable blade support shaft 16.

A head cap 17 that can be attached to and detached from the movable blade support shaft 16 is provided at the tip of the razor head 2. Both ends of the fixed blade 15 in the axial direction are supported by the head cap 17 attached to the movable blade support shaft 16 and the main body case 1.

As shown in FIG. 12, a tapered guide portion 82 is formed at least at the lower end of the upper and lower ends of the fixed blade 15, and the outer surface thereof is reinforced by the reinforcing ring 43.

The movable blade 14 attached to the movable blade support shaft 16 and the fixed blade 15 attached to the main body case 1 are removed and fixed by the head cap 17 attached to the movable blade support shaft 16. With the head cap 17 removed from the movable blade support shaft 16, the fixed blade 15 and the movable blade 14 are configured to be separable from the main body case 1 and the movable blade support shaft 16.

As shown in FIG. 2, the main body case 1 is composed of a base case 3 and a head side case 5 which is swingably connected to the base case 3 by a bending shaft 4. The head side case 5 can be swung between a first posture that is linearly continuous with the base case 3 along the axis P of the main body case 1 and a second posture that is bent and displaced by a predetermined angle from the first posture. Constitute.

The bending shaft 4 provided in either the base case 3 or the head side case 5 is supported by the bearing portion 12 provided in the other so as to be relatively swingable. An elastic moderation structure for holding the head side case 5 in the first posture and the second posture is provided between the bending shaft 4 and the bearing portion 12. The elastic moderation structure includes a ring-shaped moderation spring 60 fixed to either the bending shaft 4 or the bearing portion 12, a plurality of first moderators 61 provided on the moderation spring 60, and the bending shaft 4 and the bearing portion 12. The other side of the bearing is provided with a plurality of second moderators 62 that elastically deform the moderator spring 60 and engage with the first moderator 61. Razor between the second posture in which the first moderator 61 and the second moderator 62 engage with each other and the dead point at which the first moderator 61 and the second moderator 62 are disengaged in the second posture. The head 2 is configured to float against the spring force of the moderation spring 60.

The number of the first moderator 61 and the second moderator 62 engaged in the first posture is set to be larger than the number of the first moderator 61 and the second moderator 63 engaged in the second posture.

A power transmission structure for transmitting the rotational power of the motor 8 to the movable blade 14 is provided between the motor 8 provided inside the base case 3 and the movable blade shaft 18 provided inside the head side case 5. The power transmission structure is such that the drive gear 85 that transmits the rotational power of the motor 8 and the passive gear 86 fixed to the movable blade shaft 18 are simultaneously meshed with the drive gear 85 and the passive gear 86 to passively transmit the power of the drive gear 85. The face gear 84 transmitted to the gear 86 is included.

The motor 8 and the power transmission structure for transmitting the rotational power of the motor 8 to the movable blade 14 are provided in the head side case 5 of the main body case 1.

The central axis of the motor 8 provided on the head side case 5 is tilted with respect to the axis P of the main body case 1. As shown in FIG. 3, the power transmission structure includes a flexible shaft 69 fixed to the output shaft of the motor 8, a drive gear 70 fixed to the output end of the flexible shaft 69, and a drive gear 70 fixed to the movable blade shaft 18. It is composed of a driven gear 20 that meshes.

An illuminating body 75 that illuminates the skin surface is arranged at the end of the main body case 1. The optical axis of the illuminating body 75 faces the outside of the peripheral surface of the razor head 2 and is directed.

A rib-shaped finger hook protrusion 11 along the axis P of the main body case 1 is formed on the peripheral surface of the main body case 1.

In the present invention, the movable blade 14 is composed of the movable blade shaft 18 and the small blade 19 mounted on the movable blade shaft 18, and the hair dust accumulating portion 27 is recessed between the tip of the small blade 19 and the mounting base end 19a. It was formed so that the hair dust cut by the small blade 19 could be held and stored in the hair waste accumulating portion 27. According to such an electric razor, as long as the movable blade 14 is rotationally driven, the hair chips cut by the movable blade 14 are continuously held in the hair dust accumulating portion 27, and the hair dust is blown off by the small blade 19. It is possible to prevent the fixed blade 15 from scattering outside, and therefore the shaving can be performed in a hygienic condition at all times. The hair dust held in the hair dust accumulation portion 27 can be removed by washing with water. If washing with water is not possible, the fixed blade 15 and the movable blade 14 are separated from the main body case 1 with the drive of the movable blade 14 stopped, and then the hair dust is scraped out from the hair dust accumulating portion 27 using a brush or the like. It can be removed by.

When the mounting base end 19a of the small blade 19 is formed on a plane along the tangent line T of the peripheral surface of the movable blade shaft 18, when the moment associated with the cutting resistance at the time of cutting the whiskers acts on the mounting base end 19a, the mounting base end 19a Since the movable blade shaft 18 is elastically deformed toward the peripheral surface side, the previous moment (the moment associated with the cutting resistance at the time of cutting the whiskers) can be absorbed and released. Therefore, it is possible to prevent the fixed structure of the mounting base end 19a from being fatigued and broken by the action of the previous moment.

If the hair dust accumulating portion 27 is formed by a curved surface that is recessed from the virtual reference line Q toward the upper side in the rotation direction of the movable blade 14, the recessed shape and recess depth of the hair dust accumulating portion 27 can be freely selected as needed. , The hair dust accumulation portion 27 can be easily formed. Further, the volume of the hair dust collecting portion 27 can be increased to hold a larger amount of hair dust inside the hair dust collecting portion 27. Further, it is possible to prevent the cut hair dust from jumping out of the hair dust accumulating portion 27 by receiving the centrifugal force of the small blade 19.

When the tip of the small blade 19 is projected from the virtual reference line Q to the lower side in the rotation direction of the movable blade 14, the tip of the small blade 19 shifts to the upper side in the rotation direction of the movable blade 14 due to the cutting resistance at the time of cutting the whiskers. Even so, it is possible to reliably prevent the tip of the small blade 19 from moving beyond the virtual reference line Q to the upper side in the rotation direction of the movable blade 14. Therefore, it is possible to prevent the tip of the small blade 19 from hitting the inner surface of the fixed blade 15 and damaging either the tip of the small blade 19 or the fixed blade 15. Further, the length of the small blade 19 that is in sliding contact with the fixed blade 15 can be increased, and the elastic force and suppleness of the small blade 19 can be improved accordingly.

When the hair dust collecting portion 27 is tilted from the lower end side to the upper end side of the movable blade shaft 18, the hair dust is made to flow together with the washing water along the tilted hair dust collecting portion 27 at the time of washing with water, and the razor head 2 The hair dust can be surely and easily washed away toward the head cap 17 at the upper end of the.

When the cutting edge 25 having a continuous waveform is formed at the tip of the small blade 19, the tip of the small blade 19 can be brought into close contact with the fixed blade 15, and further, the cutting can be performed with the inclined blade portion of the cutting blade 25, so that the whiskers can be cut. Can be done effectively.

When the opening 26 is formed in the small blade wall continuous with the cutting edge of the small blade 19, the hair dust adhering to the inner surface of the fixed blade 15 can be introduced from the opening 26 and held in the hair dust accumulating portion 27. Therefore, it is possible to prevent the hair dust from being discharged to the outside of the cutting blade 25 and scattered from the blade hole 45 of the fixed blade 15. Further, if the cutting edge 28 is formed on the opening edge of the opening 26 on the side of the hair dust accumulating portion 27, the chance of capturing the whiskers by the cutting edge 25 provided at the cutting edge of the small blade 19 and the cutting edge 28 provided at the opening 26 increases. , The beard can be cut more effectively.

When the cutting blade 28 formed on the opening edge of the opening 26 is tilted with respect to the axis of the movable blade shaft 18, pulling can be performed at the tilted blade portion of the cutting blade 28, so that whisker cutting can be effectively performed. ..

If cutting blades 25 and 28 are formed on the tip of the small blade 19 and the opening edge of the opening 26 on the hair dust accumulating portion 27 side, respectively, the chances of capturing the whiskers by both cutting blades 25 and 28 increase. You can do it effectively.

When the cutting edge angle θ1 of the cutting edge 25 is set to be larger than the cutting edge angle θ2 of the cutting edge 28 formed in the opening 26, the whiskers that are difficult to cut are captured by the cutting edge 25 at the tip of the small blade 19 and inside the fixed blade 15. Since the beard in this state can be cut by the cutting blade 28 on the side of the sharper opening 26 after dragging, a deep shave can be performed as compared with the case where the beard is cut only by the cutting blade 25.

When a movable blade 14 is provided inside the cylindrical fixed blade 15 and a cutting region having a cutting blade 44 and a blade hole 45 is provided on the entire peripheral surface of the fixed blade 15, any of the entire peripheral surfaces of the fixed blade 15 is provided. You can cut the beard on the peripheral surface of the blade. Therefore, as compared with the case where the cutting region is partially provided on the peripheral surface of the fixed blade 15, the whiskers can be cut by simply applying an arbitrary peripheral surface of the fixed blade 15 to the skin surface, and the fixed blade that hits the skin surface. Even when the peripheral surface position of 15 changes, whiskers can be continuously cut.

When the fixed blade 15 is formed in a long cylindrical shape in the axial direction and a plurality of cutting regions having different formation patterns of the cutting blade 44 and the blade hole 45 are provided in the circumferential direction of the fixed blade 15, the length of the whiskers and the dense growth of whiskers are provided. By properly using each cutting area according to the difference in degree, whisker cutting can be performed quickly and effectively.

When the fixed blade 15 is provided with a short hair cutting region Z1 that mainly cuts short hair and a stump hair cutting region Z2 that mainly cuts stump hair shorter than short hair, after rough shaving in the short hair cutting region Z1, A finish shave can be performed at the stump hair cutting area Z2. Therefore, as compared with the case where only the short hair cutting region Z1 or only the stump hair cutting region Z2 is formed on the fixed blade 15, the whiskers can be cut efficiently in a shorter time and the burden on the skin surface can be reduced.

When the fixed blade 15 is provided with a short hair cutting region Z1, a stump hair cutting region Z2, and a long hair cutting region Z3 that mainly cuts curly hair and long hair, each of them is provided according to the difference in whiskers length and the degree of beard density. By properly using the cutting regions Z1 to Z3, whisker cutting can be performed quickly and effectively.

When a long hair cutting region Z3 is formed at one end of the fixed blade 15 in the axial direction and a short hair cutting region Z1 is formed on the peripheral surface of the remaining fixed blade 15, the position of the fixed blade 15 that hits the skin surface is set to the axis P of the main body case 1. The cut region that hits the skin surface can be quickly changed between the short hair cut region Z1 and the long hair cut region Z3 simply by shifting along the line. When the short hair cutting region Z1 and the long hair cutting region Z3 are provided adjacent to each other in the circumferential direction of the fixed blade 15, the gripping position of the main body case 1 is changed in the circumferential direction to cut the hair so as to hit the skin surface. Since it is necessary to change the area, it takes time and effort accordingly.

When the reinforcing ring 43 is provided at least at one end in the axial direction of the blade main body 42, the reinforcing ring 43 can regulate that the blade main body 42 applied to the skin surface tends to be deformed in an inwardly concave shape. Therefore, even when the blade body 42 is strongly pressed against the skin surface, the outer shape of the blade body 42 can be kept in a cylindrical shape to accurately cut the whiskers.

If the blade main body 42 is inserted and fixed at the time of forming the reinforcing ring 43, it is not necessary to separately provide a structure for integrating the blade main body 42 and the reinforcing ring 43, and the structure of the fixed blade 15 can be simplified.

When a reinforcing portion 80 that bends in the radial direction is formed at at least one end in the axial direction of the fixed blade 19, the reinforcing portion 80 regulates the blade body 42 from elastically deforming inward in the radial direction, and the structure of the fixed blade 15 The strength can be further increased. Along with this, when the structural strength of the fixed blade 15 is kept constant, the thickness of the fixed blade 15 can be made thinner to perform deep shaving.

When the movable blade support shaft 16 is provided at one end of the main body case 1 and the movable blade shaft 18 formed in a hollow tubular shape is rotatably supported by the movable blade support shaft 16, the vertically long movable blade 14 is in a light and stable state. It can be rotatably supported, and the drive load of the motor 8 can be reduced to reduce power consumption. Further, since the movable blade 14 can be rotationally driven in a stable state, whisker cutting can be performed uniformly.

When both ends of the fixed blade 15 in the axial direction are supported by the head cap 17 mounted on the movable blade support shaft 16 and the main body case 1, the cylindrical fixed blade 15 is firmly fixed by the head cap 17 and the main body case 1. Can be retained. Therefore, it is possible to prevent the fixed blade 15 pressed against the skin surface from tilting due to the reaction force of the skin or shifting in the direction of the central axis, and the whiskers can be cut appropriately. Further, the sliding contact resistance of the movable blade 14 and the fixed blade 15 in the axial direction can be made constant, and the whiskers cutting action of the fixed blade 15 in the axial direction can be made uniform.

When a tapered guide portion 82 is formed at least at the lower end of the fixed blade 15 and the outer surface thereof is reinforced by the reinforcing ring 43, the reinforcing ring 43 restricts the blade body 42 from elastically deforming inward in the radial direction. Therefore, the structural strength of the blade body 42 can be improved. Further, since the fixed blade 15 can be assembled to the movable blade 14 by using the guide portion 82 formed at least on the lower side of the fixed blade 15 as a guide, the fixed blade 15 can be assembled to the movable blade 14. It can be done easily. Maintenance of the movable blade 14 and the fixed blade 15 can be facilitated.

If the movable blade 14 and the fixed blade 15 are fixed by the head cap 17 attached to the movable blade support shaft 16, the fixed blade 15 can be attached to the main body case 1 simply by removing the head cap 17 from the movable blade support shaft 16. The movable blade 14 can be separated from the movable blade support shaft 16. Therefore, the assembly and maintenance of the movable blade 14 and the fixed blade 15 can be facilitated.

As shown in FIG. 2, according to an electric razor in which the main body case 1 is composed of the base case 3 and the head side case 5 so that the head side case 5 can swing between the first posture and the second posture. The beard can be cut by changing the posture of the head side case 5 according to the condition of the skin surface of the beard cutting portion. For example, when cutting the beard on the sideburns or the lower surface of the chin, the head side case 5 is bent to cut the beard, so that the base case 3 does not need to be frequently gripped and the beard is in a more comfortable posture. Can be disconnected.

When an elastic moderation structure including a moderation spring 60, a first moderator 61, and a second moderator 62 is provided between the bending shaft 4 and the bearing portion 12, the head side case 5 is placed in the first and second postures. Since it can be held, the beard can be cut in a stable state in each posture. Further, in the state where the head side case 5 is switched to the second posture, the razor head 2 floats between the dead points against the spring force of the moderation spring 60, so that the fixed blade 15 is excessively pressed against the skin surface. It is possible to eliminate the heavy burden on the skin surface.

When the number of the first moderator 61 and the second moderator 62 engaged in the first posture is set to be larger than the number of the first moderator 61 and the second moderator 63 engaged in the second posture, the head side case 5 can be returned from the second posture to the first posture with a smaller force. On the contrary, when switching the head side case 5 from the first posture to the second posture, a larger force is required. Therefore, contrary to the user's intention during shaving, the posture of the head side case 5 is the second posture. It is possible to prevent switching to the posture. Therefore, when shaving is performed with the head side case 5 in the first posture, the beard can be cut in a stable state.

When a power transmission structure is provided between the motor 8 provided in the base case 3 and the movable blade shaft 18 provided in the head side case 5, the head side case 5 is held in a bent state in the second posture. It can be resolved. Further, when the power transmission structure is configured by the drive gear 85 and the passive gear 86 and the face gear 84 that meshes with both gears 85 and 86 at the same time, the motor lead that supplies the drive current to the motor 8 provided in the base case 3 becomes Since it is not bent, it is possible to eliminate the disconnection of the motor lead.

When the motor 8 and the power transmission structure for transmitting the rotational power of the motor 8 to the movable blade 14 are provided in the head side case 5 of the main body case 1, for example, the motor 8 and the movable blade shaft 18 are directly connected, or the motor 8 or the deceleration The drive gear 70 fixed to the output shaft of the unit 9 can drive the driven gear 20 of the movable blade shaft 18 to rotationally drive the movable blade 14. Therefore, the power transmission structure for the movable blade 14 can be remarkably simplified and its cost can be reduced.

The central axis of the motor 8 provided on the head-side case 5 is tilted with respect to the axis P of the main body case 1 in order to avoid the head-side case 5 from becoming large and heavy. .. Further, when the central axis of the motor 8 and the central axis of the drive gear 70 are parallel, the flexible shaft 69 is curved in a gentle S shape to form a convex curved portion and a concave curved portion, and between the two curved portions. It is inevitable that an inflection point will be formed. However, when the motor 8 is tilted, the bending angle of the flexible shaft 69 can be reduced to avoid the formation of the inflection point, so that the transmission loss of the rotational power between the motor 8 and the drive gear 70 can be avoided. Can be made smaller.

When the illuminating body 75 is arranged at the end of the main body case 1 and its optical axis is directed toward the outside of the peripheral surface of the razor head 2, the illuminating light emitted from the illuminating body 75 illuminates the skin surface and the whiskers. You can cut the beard. Therefore, it is possible to accurately cut the whiskers while accurately grasping the state of the whiskers and the cutting status of the whiskers.

When a plurality of cutting areas having a cutting blade 44 and a blade hole 45 are provided on the peripheral surface of the fixed blade 15, the gripping position of the main body case 1 is changed in the circumferential direction to match the cutting area according to the state of the whiskers. Cut the beard with. In such a case, if a rib-shaped finger hook protrusion 11 along the axis P of the main body case 1 is formed on the peripheral surface of the main body case 1, the posture of the main body case 1 can be changed by using the rib-shaped finger hook protrusion 11. As a result, the posture can be changed appropriately, so that it becomes possible to more easily cut the whiskers in the cutting region suitable for the state of the whiskers.

It is sectional drawing which shows the cutting edge structure of the electric razor which concerns on Example 1 of this invention. It is a side view of the electric razor which concerns on Example 1. FIG. It is a longitudinal side view of the razor head of the electric razor which concerns on Example 1. FIG. It is an exploded sectional view of the razor head of the electric razor which concerns on Example 1. FIG. It is a front view of the movable blade of the electric razor which concerns on Example 1. FIG. FIG. 3 is a sectional view taken along line AA in FIG. It is a development view of the fixed blade of the electric razor which concerns on Example 1. FIG. It is explanatory drawing which shows the manufacturing process of the fixed blade of the electric razor which concerns on Example 1. FIG. It is a longitudinal side view of the elastic moderation structure of the electric razor which concerns on Example 1. FIG. It is a longitudinal side view which shows another operation of the elastic moderation structure. It is sectional drawing of the fixed blade of the electric razor which concerns on Example 2. FIG. It is sectional drawing of the fixed blade of the electric razor which concerns on Example 3. FIG. It is a front view of the fixed blade of the electric razor which concerns on Example 4. FIG. It is a front view of the fixed blade of the electric razor which concerns on Example 5. FIG. It is a side view of the electric razor which concerns on Example 6. It is a schematic side view which shows the power transmission structure of the electric razor which concerns on Example 6. It is sectional drawing which shows the cutting blade structure of the electric razor which concerns on Example 7. FIG. It is a front view of the movable blade and the sleeve of the electric razor which concerns on Example 7. FIG. It is an exploded perspective view of the movable blade and the sleeve of the electric razor which concerns on Example 7. FIG. It is a side view of the reciprocating drive type electric razor to which this invention is applied. It is a longitudinal side view which shows the power transmission structure in the electric razor of FIG.

(Example 1) FIGS. 1 to 10 show Example 1 in which the present invention is applied to a cylinder-type electric razor. The front / rear, left / right, and up / down in this embodiment follow the crossing arrows shown in FIG. 2 and the front / rear, left / right, and up / down indications shown in the vicinity of each arrow. As shown in FIG. 2, the electric razor according to the present embodiment includes a main body case 1 that also serves as a grip, and a razor head 2 that is supported by the main body case 1. The main body case 1 is composed of a base case 3 and a head side case 5 that is swingably connected to the base case 3 by a bending shaft 4, and a battery 6 and a control board 7 are housed inside the base case 3. The motor 8 and the reduction unit 9 are arranged inside the head-side case 5. A switch button 10 for starting or stopping the motor 8 is provided on the front surface of the base case 3. Ribbed finger hooks 11 along the axis P of the main body case 1 are formed on the left and right side surfaces of the base case 3 and the head side case 5. Although not shown, the reduction unit 9 is composed of a planetary gear type reduction unit, and reduces the rotational power of the motor 8 to a quarter and outputs the speed.

As shown in FIGS. 3 and 6, the razor head 2 has a movable blade 14, a cylindrical fixed blade 15 that surrounds the movable blade 14, and a movable blade support shaft 16 that pivotally supports the movable blade 14. A head cap 17 or the like that is attached to the blade support shaft 16 to retain and hold the movable blade 14 and the fixed blade 15 is provided. The movable blade 14 includes a cylindrical movable blade shaft 18 that is rotationally driven by the power of the motor 8 and four small blades 19 that are mounted and fixed around the movable blade shaft 18 from one end to the other. A driven gear 20 fixed to the lower end of the movable blade shaft 18 and a thrust ring 21 fixed to the upper end of the movable blade shaft 18 are provided. The movable blade shaft 18 and the small blade 19 are each made of stainless steel, and a plurality of mounting base ends 19a of each small blade 19 are welded and fixed to the movable blade shaft 18. The welded portion (fixed structure) is indicated by reference numeral 22. As described above, in the electric razor in this embodiment, the movable blade 14 is provided inside the fixed blade 15 formed in a cylindrical shape (cylinder shape), and the tip of the small blade 19 is directed with respect to the inner surface of the fixed blade 15. The whiskers are cut by sliding. The fixing structure of the mounting base end 19a of each small blade 19 may be a screw fastening structure or a caulking fixing structure other than welding. The driven gear 20 does not have to be separate from the movable blade shaft 18, and may be integrally formed with the movable blade shaft 18.

As shown in FIGS. 4 and 5, a continuous corrugated cutting edge 25 is formed at the tip of the small blade 19, and a curved opening 26 is intermittently formed in the small blade wall continuous with the concave edge of the cutting edge 25. Another cutting edge 28 is formed on the opening edge of the opening 26 on the side of the hair dust accumulating portion 27. Most of the curved cutting edge 28 is inclined with respect to the axis P of the movable blade axis 18. The line connecting the ridge ends (tips) of the continuous corrugated cutting edge 25 is provided parallel to the axis P of the movable blade axis 18. When the cutting edge 25 having a continuous waveform is formed at the tip of the small blade 19, the tip of the small blade 19 can be brought into close contact with the fixed blade 15, and further, the cutting can be performed with the inclined blade portion of the cutting blade 25, so that the whiskers can be cut. Can be done effectively. Similarly, since the whiskers can be cut off by the curved cutting edge 28, the whiskers can be cut sharply and sharply. Further, when the curved opening 26 is formed along the concave edge of the cutting blade 25, the hair dust adhering to the inner surface of the fixed blade 15 can be introduced from the opening 26 and held in the hair dust accumulating portion 27. Therefore, it is possible to prevent the hair dust from being discharged to the outside of the cutting blade 25 and scattered from the blade hole 45 of the fixed blade 15. Further, since the cutting edge 25 provided at the cutting edge of the small blade 19 and the cutting edge 28 provided at the opening 26 increase the chances of capturing the whiskers, the whiskers can be cut more effectively.

As described above, when the cutting blades 25 and 28 are formed at the tip of the small blade 19 and the opening edge of the opening 26 on the hair dust accumulating portion 27 side, respectively, the cutting blade 25 is provided only at the tip of the small blade 19. Compared with, the chance of cutting the beard can be increased, and the beard can be cut effectively accordingly. As shown in FIG. 1, the cutting edge angle θ1 of the cutting edge 25 provided at the tip of the small blade 19 is set to be larger than the cutting edge angle θ2 of the cutting edge 28 on the opening 26 side (see FIG. 1). In this method, the whiskers that are difficult to cut are captured by the cutting blade 25 at the tip of the small blade 19 and dragged into the fixed blade 15, and the whiskers in this state are cut by the cutting blade 28 on the side of the sharper opening 26. , To enable deep shaving.

In the above electric razor, in order to prevent the hair dust cut by the movable blade 14 from scattering to the outside of the fixed blade 15, the tip of the small blade 19 sliding in contact with the inner surface of the fixed blade 15 and the movable blade shaft 18 A hair dust accumulating portion 27 for storing the hair cut by the small blade 19 is formed as a recess between the mounting base ends 19a of the small blade 19 fixed to the small blade 19. As shown in FIG. 1, when assuming a virtual reference line Q that is orthogonal to the tangent line T of the front peripheral surface of the movable blade shaft 18 and passes through the contact point of the tangent line T, the hair dust accumulating portion 27 is movable from the virtual reference line Q. It is formed by a curved surface that dents toward the upper side in the rotation direction of the blade 14, whereas the tip of the small blade 19 including the cutting blade 25 is moved from the virtual reference line Q to the lower side in the rotation direction of the movable blade 14 by the dimension a. It is protruding. Further, as shown in FIGS. 5 and 6, the hair dust accumulating portion 27 is inclined from the lower end side to the upper end side of the movable blade shaft 18, and the hair dust accumulating portion 27 approaches the upper end of the movable blade shaft 18. The depth of the dent is increased. Further, the mounting base end 19a of the small blade 19 fixed to the movable blade shaft 18 is formed in a plane along the tangent line T of the peripheral surface of the movable blade shaft 18.

In FIG. 3, the movable blade support shaft 16 is made of a stainless steel round shaft, and a flange wall 16a provided at the lower end thereof is inserted and fixed to the upper wall of the head side case 5. Bearings 31 are mounted on the upper and lower parts of the movable blade support shaft 16 so as not to move up and down, and the movable blade shaft 18 is rotatably supported by the bearings 31. In this way, when the movable blade shaft 18 of the movable blade 14 is pivotally supported by the movable blade support shaft 16 fixed to the head side case 5 via the bearing 31, the vertically long movable blade 14 rotates in a light and stable state. Since it can be supported as much as possible, the drive load of the motor 8 can be reduced and the power consumption can be reduced. The rotation center axis of the movable blade 14 does not tilt during rotation. Further, since the movable blade 14 can be rotationally driven in a stable state, whisker cutting can be performed uniformly.

The head cap 17 is composed of a cap body 32 made of a plastic molded product and a shutter 33 made of a stainless steel plate material arranged on the upper surface of the cap body 32. Cleaning openings 34 for discharging cleaning water are formed at a plurality of locations on the upper wall of the cap body 32, and the cleaning openings 34 can be opened and closed by rotating the shutter 33 around the shutter shaft 35. A screw shaft 36 is integrally provided at the center of the inner surface of the cap body 32, and a cylinder wall 37 for holding and holding the thrust ring 21 is formed around the screw shaft 36. Further, a mounting seat 38 for holding the fixed blade 15 is recessed on the inner surface of the cap body 32. The head cap 17 is integrated with the movable blade support shaft 16 by screwing the screw shaft 36 into the screw hole 39 provided in the movable blade support shaft 16, and the movable blade 14 and the fixed blade 15 assembled to the head side case 5. Remove and fix. At this time, the cylinder wall 37 holds the thrust ring 21 in place to prevent the movable blade 14 from moving upward. When the head cap 17 is removed from the movable blade support shaft 16, the fixed blade 15 and the movable blade 14 can be separated from the head side case 5 and the movable blade support shaft 16. In this way, the fixed blade 15 and the movable blade 14 can be attached to and detached from the head side case 5 and the movable blade support shaft 16 by inserting and removing them along the movable blade support shaft 16.

The fixed blade 15 is composed of a vertically long endless cylindrical blade body 42 and reinforcing rings 43 fixed to both upper and lower ends of the blade body 42. A plurality of cutting regions having different formation patterns of the cutting blade 44 and the blade hole 45 are provided in the circumferential direction of the peripheral surface of the blade main body 42. In this embodiment, as shown in the developed view of FIG. 7, a short hair cutting region Z1 that mainly cuts short hair, a stump hair cutting region Z2 that mainly cuts stump hair shorter than short hair, and mainly curly hair. And three types of cutting regions of the long hair cutting region Z3 for cutting the long hair are formed on the peripheral surface of the blade body 42. The blade holes 45 in the short hair cutting region Z1 are formed in a horizontally long hexagonal shape, the blade holes 45 in the stump hair cutting region Z2 are formed in a regular hexagonal shape, and the individual opening areas of the blade holes 45 in the stump hair cutting region Z2. Is smaller than the individual opening area of the blade hole 45 in the short hair cutting region Z1. The blade hole 45 of the long hair cutting region Z3 is formed in a long groove shape long in the circumferential direction, and curly hair and long hair can be effectively introduced. (Z2> = Z1> Z3) can be satisfied with respect to the circumferential length of each cutting region Z1 to Z3. According to such a fixed blade 15, the area areas of the short hair cutting region Z1 and the stump hair cutting region Z2, which are frequently used, can be increased to increase the cutting opportunity of the short hair and the stump hair, so that the whiskers can be cut in a shorter time. Can be done effectively with. In addition, (Z3> Z1> Z2) can be satisfied with respect to the thickness of each cutting region Z1 to Z3. The outer surfaces of the regions Z1 to Z3 can be coated with different colors, and in that case, it is possible to clarify which cut region is in contact with the skin surface, so that the usability of the user can be improved.

A bell mouth-shaped guide portion 81 continuous with the inner surface of the blade body 42 is formed on the inner surface of the upper reinforcing ring 43, and a bell mouth continuous with the inner surface of the blade body 42 is formed on the inner surface of the lower reinforcing ring 43. A shaped guide portion 82 is formed. According to such a fixed blade 15, the structural strength of the blade body 42 can be improved by restricting the blade body 42 from elastically deforming inward in the radial direction with the reinforcing ring 43. Further, since the fixed blade 15 can be assembled to the movable blade 14 by using the guide portion 82 formed on the lower side of the fixed blade 15 as a guide, the fixed blade 15 can be easily assembled to the movable blade 14. Can be done. Similarly, since the movable blade 14 can be assembled to the fixed blade 15 by using the guide portion 81 formed on the upper side of the fixed blade 15 as a guide, the movable blade 14 can be easily assembled to the fixed blade 15. .. Therefore, maintenance of the movable blade 14 and the fixed blade 15 can be facilitated.

The blade body 42 is formed into a vertically long endless cylinder through the electroforming treatment shown in FIGS. 8 (a) to 8 (d). First, a glass cylindrical base material 46 is prepared, and a copper plating layer is formed on the peripheral surface thereof. Next, a photoresist layer was formed on the surface of the base material 46, and the upper surface of the photoresist layer was exposed in close contact with the photomask, developed and dried, and the unexposed portion was dissolved and removed to provide a resist opening 47. A resist pattern 48 is formed on the surface of the base material 46. The shape of the resist pattern 48 matches the patterns of the cutting edge 44 and the cutting edge hole 45 in each of the cutting regions Z1 to Z3. Next, the base metal 46 is immersed in the electroforming liquid to grow the electrodeposited metal (copper) on the plating layer exposed in the resist opening 47 to form the primary electroforming layer 49. At this time, the primary electroformed layer 49 is grown until it slightly exceeds the thickness of the resist pattern 48.

Next, the base material 46 is immersed in another electroforming liquid to grow an electrodeposited metal (nickel-cobalt alloy) on the outer surface of the primary electroforming layer 49 to form the secondary electroforming layer 50. Finally, the base material 46 is crushed to separate the cylindrical blank from the base material 46, and the photoresist layer and the primary electrocasting layer 49 are melted and removed to obtain a front blank of the blade body 42. , The front blank is ground to complete the blade body 42.

The reinforcing ring 43 is made of a plastic molded product, and the reinforcing ring 43 can be integrated with the blade body 42 by inserting the blade body 42 at the time of molding. In this way, if the blade body 42 is inserted and fixed at the time of forming the reinforcing ring 43, it is not necessary to separately provide a structure for integrating the blade body 42 and the reinforcing ring 43, so that the structure of the fixed blade 15 can be simplified. As shown in FIGS. 3 and 4, a step portion 53 that fits into the mounting seat 38 of the head cap 17 is formed on the upper peripheral edge of the upper reinforcing ring 43, and the lower peripheral edge of the lower reinforcing ring 43 is formed. A step portion 55 that fits into the mounting seat 54 of the head side case 5 is formed. Further, the stepped portion 55 of the lower reinforcing ring 43 and the mounting seat 54 of the head side case 5 are formed with protrusions 56 and recesses 57 that engage with each other to fix and hold the fixing blade 15 so as not to rotate. There is. When the reinforcing rings 43 are provided above and below the blade body 42 as described above, the upper and lower reinforcing rings 43 can regulate that the blade body 42 applied to the skin surface tends to be deformed in an inwardly concave shape. Therefore, even when the blade body 42 is strongly pressed against the skin surface, the outer shape of the blade body 42 can be kept in a cylindrical shape to accurately cut the whiskers. Further, it is possible to prevent the contact area between the skin surface and the blade body 42 from becoming unnecessarily large, and reduce the burden on the skin surface.

As shown in FIG. 2, the head-side case 5 is connected to the base case 3 by a bending shaft 4 so as to swing back and forth, and is linearly continuous with the base case 3 along the axis P of the main body case 1. It is possible to swing between the first posture (the state shown by the solid line in FIG. 2) and the second posture (the state shown by the imaginary line in FIG. 2) in which the first posture is bent and displaced 90 degrees forward. The user can perform shaving while holding the razor head 2 in the first posture, and can also perform shaving while holding the razor head 2 in the second posture when necessary. In order to hold the head side case 5 in the first posture and the second posture, an elastic moderation structure is provided between the bending shaft 4 and the bearing portion 12 that pivotally supports the coaxial 4.

In FIG. 9, a connecting arm 58 is projected from the lower surface of the head-side case 5, and a connecting groove 59 for accommodating the connecting arm 58 is formed in the base case 3 from the upper surface of the case to the front surface of the case. The bending shaft 4 is integrally formed with the head side case 5. In FIGS. 9 and 10, the elastic moderation structure consists of a plastic ring-shaped moderation spring 60 fixed to the bending shaft 4 and two moderation protrusions (first moderation body) provided at positions facing the periphery of the moderation spring 60. It is provided with 61 and moderation recesses (second moderation bodies) 62 and 63 provided at three locations on the inner surface of the bearing portion 12. The moderation recesses 62 and 63 are formed between two arc protrusions formed adjacent to each other, and two moderation recesses 62 are provided at positions facing each other in the front-rear direction on the inner surface of the bearing portion 12, and the moderation recesses 62 and 63 are provided on the inner surface of the bearing portion 12. A third moderation recess 63 is formed in the center of the lower surface. A pair of connecting pieces 65 are projected from the inner surface of the moderation spring 60, and each connecting piece 65 is engaged and fixed to a connecting groove 66 formed in the bending shaft 4, and the moderating spring 60 is integrated with the bending shaft 4. Has been transformed.

In the state where the head-side case 5 is displaced to the first posture, as shown in FIG. 9, two moderation protrusions 61 are engaged with two moderation recesses 62 provided on the front and rear of the inner surface of the bearing portion 12. .. Further, when the head side case 5 is displaced from the first posture to the second posture, as shown in FIG. 10, only one moderation protrusion 61 is provided in the center of the lower surface of the bearing portion 12, and one moderation recess is provided. It is engaged with 63. By providing the elastic moderation structure in this way, the head side case 5 can be held in the first posture and the second posture, so that the whiskers can be cut in a stable state in each posture.

Further, when the razor head 2 is pressed against the skin surface in the state where the head side case 5 is switched to the second posture, the razor head 2 receives the skin reaction force and tries to rotate in the counterclockwise rotation direction in FIG. .. However, the moderation spring 60 is elastically deformed as the moderation protrusion 61 tries to get over the arc protrusion on the right side of the moderation recess 63 toward FIG. 10, and the razor head 2 rotates in the counterclockwise rotation direction due to the deformation stress. As the skin reaction force becomes smaller, the razor head 2 returns to the horizontal second posture. When the razor head 2 rotates in the counterclockwise rotation direction against the deformation stress of the moderation spring 60, the lower surface of the connecting arm 58 is received by the front end of the connecting groove 59, so that the razor head 2 tilts further. The moderation protrusion 61 does not get over the top (dead point) of the arc protrusion of the moderation recess 63. Similarly, in the state where the head side case 5 is switched to the first posture, when the razor head 2 is pressed against the skin surface, the razor head 2 receives the skin reaction force and tries to rotate in the clockwise direction in FIG. To do. In this case, the moderation protrusion 61 tries to get over the lower arc protrusion of the right arc protrusion toward FIG. 9 and the upper arc protrusion of the left arc protrusion toward FIG. 9. Along with this, the moderation spring 60 is elastically deformed, and the deformation stress restricts the razor head 2 from rotating in the clockwise rotation direction. Therefore, as the skin reaction force becomes smaller, the razor head 2 is in the first vertical posture. Return to. When the razor head 2 rotates in the clockwise direction against the deformation stress of the moderation spring 60, the inclined lower surface of the connecting arm 58 is received by the upper end of the connecting groove 59, so that the razor head 2 swings backward. It does not move, and the moderation protrusion 61 does not get over the top (dead point) of the arc protrusion of the moderation recess 62. As described above, since the razor head 2 is float-supported by the base case 3 so as to be swingable back and forth, it is possible to eliminate the excessive pressing of the fixed blade 15 against the skin surface and place a heavy burden on the skin surface. Can be resolved. In the first posture, the two moderation protrusions 61 engage with the moderation recess 62, and in the second posture, one moderation protrusion 61 engages with the moderation recess 63. Therefore, the deformation of the moderation spring 60 in the first posture. The stress is sufficiently larger than the deformation stress of the moderation spring 60 in the second posture.

Further, since the number of the moderation protrusions 61 and the moderation recesses 62 engaged in the first posture is set to be larger than the number of the moderation protrusions 61 and the moderation recesses 63 engaged in the second posture, the head side case 5 is subjected to a smaller force. It is possible to return from the second posture to the first posture. On the contrary, when switching the head side case 5 from the first posture to the second posture, a larger force is required. Therefore, contrary to the user's intention during shaving, the posture of the head side case 5 is the second posture. It is possible to prevent switching to the posture. Therefore, when shaving is performed with the head side case 5 in the first posture, the beard can be cut in a stable state.

As shown in FIG. 3, between the motor 8 provided inside the head side case 5 and the movable blade shaft 18 provided inside the razor head 2, the rotational power of the motor 8 is transmitted to the movable blade 14. A transmission structure is provided. The power transmission structure includes a flexible shaft 69 fixed to the output shaft of the reduction unit 9, a drive gear 70 fixed to the output end of the flexible shaft 69, and a driven gear 20 fixed to the movable blade shaft 18 and meshing with the drive gear 70. It is composed of. The gear shaft 71 of the drive gear 70 is rotatably supported by a bearing 72 fixed to the head-side case 5, and the upper side of the portion supported by the bearing 72 projects above the head-side case 5. The motor 8 and the reduction unit 9 are inclined with respect to the axis P of the main body case 1 in a state where the output shaft is located at the upper end of the inclination in order to prevent the head side case 5 from becoming large and heavy. Further, by arranging the motor 8 and the reduction unit 9 in an inclined manner, the bending angle of the flexible shaft 69 is reduced so that the transmission loss of the rotational power of the motor 8 can be reduced. Incidentally, when the central axis of the motor 8 and the central axis of the drive gear 70 are parallel, the flexible shaft 69 is curved in a gentle S shape to form a convex curved portion and a concave curved portion, and between the two curved portions. It is inevitable that an inflection point will be formed. However, when the motor 8 is tilted, the bending angle of the flexible shaft 69 can be reduced to avoid the formation of the inflection point, so that the transmission loss of the rotational power between the motor 8 and the drive gear 70 can be avoided. Can be made smaller.

In FIG. 3, an illuminating body 75 for illuminating the skin surface at the time of shaving is arranged at the upper end of the front portion of the head side case 5. In this embodiment, the illuminating body 75 is composed of a cannonball-shaped LED, and its optical axis is directed toward the outside of the peripheral surface of the razor head 2. Reference numeral 76 is a transparent diffusion block that diffuses a part of the light emitted from the illuminator 75. At the time of use, the beard is cut while illuminating the skin surface and the beard with the illumination light emitted from the illuminating body 75, so that the beard is cut accurately while accurately grasping the condition of the beard and the cutting condition of the beard. be able to.

When using an electric razor, for example, with the head side case 5 in the first posture, the short hair cutting region Z1 of the fixed blade 15 is applied to the skin surface to cut the whiskers. Further, after rough shaving in the short hair cutting region Z1, the gripping position of the main body case 1 is changed in the circumferential direction, and the stump hair cutting region Z2 is applied to the skin surface to cut the stump hair shorter than the short hair. be able to. Further, by changing the grip position of the main body case 1 again in the circumferential direction and applying the long hair cutting region Z3 to the skin surface, it is possible to cut curly hair and long hair. In this way, when the gripping position of the main body case 1 is changed in the circumferential direction, the posture can be changed appropriately by changing the posture of the main body case 1 by using the finger hook protrusion 11.

According to the electric razor configured as described above, since the hair dust cut by the movable blade 14 can be held in the hair waste accumulating portion 27, the hair dust is blown off by the small blade 19 and scattered to the outside of the fixed blade 15. Can be prevented from doing so. Therefore, shaving can always be performed in a hygienic condition. In addition, the cleaning interval of the hair debris accumulated inside the fixed blade 15 can be increased to reduce the labor required for cleaning.
Since the mounting base end 19a of the movable blade shaft 18 is formed on a plane along the tangent line T of the peripheral surface of the movable blade shaft 18, when the moment associated with the cutting resistance at the time of cutting the whiskers acts on the mounting base end 19a, the mounting base The end 19a is elastically deformed toward the peripheral surface side of the movable blade shaft 18, so that the previous moment can be absorbed and released. Therefore, it is possible to prevent the fixed structure of the mounting base end 19a, that is, the welded portion 22, from fatigue fracture due to the action of the above moment.

Since the hair dust accumulating portion 27 is formed by a curved surface recessed from the virtual reference line Q toward the upper side in the rotation direction of the movable blade 14, the hair dust accumulating portion 27 can be easily formed. Further, the volume of the hair dust accumulating portion 27 can be increased to hold a larger amount of hair dust inside the hair dust accumulating portion 27, and the cut hair dust receives the centrifugal force of the small blade 19 to accumulate hair dust. It is possible to prevent it from jumping out of the portion 27. Further, the deformation stress of the hair dust accumulating portion 27 can closely urge the peripheral surface of the small blade 19 on the cutting edge 25 side to the inner surface of the fixed blade 15.
Since the tip of the small blade 19 protrudes from the virtual reference line Q toward the lower side in the rotation direction of the movable blade 14 by the dimension a, the tip of the small blade 19 protrudes in the rotation direction of the movable blade 14 due to the cutting resistance at the time of cutting the whiskers. Even if it shifts to the upper side, it is possible to reliably prevent the cutting blade 25 at the tip of the small blade 19 from moving beyond the virtual reference line Q to the upper side in the rotation direction of the movable blade 14. Therefore, it is possible to prevent the cutting blade 25 from hitting the inner surface of the fixed blade 15 and damaging either the cutting blade 25 or the fixed blade 15. Further, the length of the small blade 19 that is in sliding contact with the fixed blade 15 can be increased, and the elastic force and suppleness of the small blade 19 can be improved accordingly.

The hair dust accumulated in the hair dust accumulating portion 27 can be washed away by washing with water. In that case, as shown in FIG. 4, the shutter 33 provided on the head cap 17 is rotated to open the cleaning opening 34. In this state, the electric razor is diagonally supported so that the head cap 17 is located at the lower end of the inclination, and the movable blade 14 is rotationally driven, and tap water is flowed from the peripheral surface of the fixed blade 15 to remove hair dust. It can be discharged from the cleaning opening 34 of the head cap 17 together with the cleaning water. At this time, if the hair dust accumulating portion 27 is inclined from the lower end side to the upper end side of the movable blade shaft 18, the hair dust is washed together with the washing water along the spiral hair dust collecting portion 27 at the time of washing with water. The hair can be made to flow and the hair dust can be surely and easily washed away toward the head cap 17.

Since the fixed blade 15 in the used state is supported by the mounting seat 38 of the head cap 17 whose upper and lower ends are fixed to the movable blade support shaft 16 and the mounting seat 54 of the head side case 5, it is a cylindrical fixed blade. 15 can be firmly fixed and held by the head cap 17 and the main body case 1. Therefore, it is possible to prevent the fixed blade 15 pressed against the skin surface from tilting due to the reaction force of the skin or shifting in the direction of the central axis, and the whiskers can be cut appropriately. Further, the sliding contact resistance of the movable blade 14 and the fixed blade 15 in the axial direction can be made constant, and the whiskers cutting action of the fixed blade 15 in the axial direction can be made uniform.
Further, since three types of cutting regions, a short hair cutting region Z1, a stump hair cutting region Z2, and a long hair cutting region Z3, are formed on the peripheral surface of the fixed blade 15, the length of the whiskers and the degree of density of the whiskers can be different. By properly using each of the cutting regions Z1 to Z3, the whiskers can be cut quickly and effectively.

When the head cap 17 is removed from the movable blade support shaft 16, the movable blade 14 and the fixed blade 15 can be easily removed from the head side case 5, so that the movable blade 14 and the fixed blade 15 can be easily replaced. .. Further, after removing the movable blade 14 from the head side case 5, the hair dust adhering to the inner surface of the hair dust accumulating portion 27, the inner surface of the movable blade shaft 18, the blade surface of the driven gear 20, etc. is cleaned or washed. , The movable blade 14 can be kept in a hygienic state. The fixed blade 15 removed from the head-side case 5 can be similarly maintained in a hygienic state.

When a cutting region having a cutting blade 44 and a blade hole 45 is provided on the entire peripheral surface of the fixed blade 15, whiskers can be cut on an arbitrary peripheral surface of the entire peripheral surface of the fixed blade 15. Therefore, as compared with the form in which the cutting region is partially provided on the peripheral surface of the fixed blade 15, the whiskers can be cut by simply applying an arbitrary peripheral surface of the fixed blade 15 to the skin surface, and the fixed blade 15 that hits the skin surface. Even if the peripheral surface position changes, whiskers can be cut continuously.

In the first embodiment, the hair dust accumulating portion 27 is formed by one curved surface, but the hair dust accumulating portion 27 may be formed by a U-shaped, V-shaped, or W-shaped recess, and the recess is formed. At least one may be provided. Further, the cutting blade 25 does not have to be a continuously corrugated blade, and may have a saw blade shape or a blade shape in which a saw blade and a corrugated blade coexist. The fixed blade 15 does not need to have a cutting region having a cutting blade 44 and a blade hole 45 on the entire peripheral surface, and is limited to, for example, one-fourth to two-thirds of the peripheral surface of the fixed blade 15. A cut region may be partially formed, such as by providing a cut region. Further, after providing a cutting region on the entire peripheral surface of the fixed blade 15, a part of the peripheral surface is covered with a head cap 17 and a cover wall provided integrally with the head side case 5, and the circumference of the fixed blade 15 is peripherally covered. The cut region may be exposed on a portion of the surface. Regarding the elastic moderation structure, the bending shaft 4 can be provided on the base case 3 side, and the bearing portion 12 can be provided on the head side case 5. Further, in Example 1, three types of cutting regions, a short hair cutting region Z1, a stump hair cutting region Z2, and a long hair cutting region Z3, were formed, but they are not necessary and correspond to the length and growth of the whiskers. Therefore, four or more types of cutting regions can be formed, or two types of cutting regions, a short hair cutting region Z1 and a long hair cutting region Z3, can be formed. The hair dust accumulating portion 27 in the small blade 19 can be formed of a mesh-like, punching metal-like, or expanded metal-like perforated plate material. When the hair dust accumulating portion 27 is formed of the perforated plate material in this way, when the movable blade 14 is rotationally driven, air escapes from the hole opening of the perforated plate material, so that the hair held in the hair dust accumulating portion 27 scatters. You can often prevent it from happening.

(Example 2) FIG. 11 shows Example 2 of the present invention in which a part of the structure of the fixed blade 15 is modified. There, a reinforcing portion 80 that bends in the radial direction is formed on the inner surface of the upper end of the blade main body 42 in a flange shape, and the upper end of the blade main body 42 and the reinforcing portion 80 are reinforced by the upper reinforcing ring 43. .. According to such a fixed blade 15, the structural strength of the fixed blade 15 can be further enhanced by restricting the elastic deformation of the blade main body 42 inward in the radial direction by the reinforcing portion 80 as compared with the blade main body 42 of the first embodiment. .. If necessary, the reinforcing portion 80 can also be provided on the inner surface of the lower end of the blade body 42. According to the fixed blade 15 having improved structural strength as described above, when the structural strength of the fixed blade 15 is constant, the thickness of the fixed blade 15 can be made thinner, so that a deep shave can be performed. Others are the same as the fixed blade 15 of the first embodiment, so the same members are designated by the same reference numerals and the description thereof will be omitted. The same shall apply in the following examples.

(Example 3) FIG. 12 shows Example 3 of the present invention in which a part of the structure of the fixed blade 15 is modified. There, the upper end and the lower end of the blade body 42 are provided with tapered guide portions 81 and 82, respectively, and the upper end and the guide portions 81 and 82 of the blade body 42 are reinforced by the upper and lower reinforcing rings 43. .. According to such a fixed blade 15, similarly to the fixed blade 15 of the second embodiment, the guide portions 81 and 82 restrict the blade main body 42 from elastically deforming inward in the radial direction, and the structural strength of the blade main body 42 is increased. Can be improved. Further, since the fixed blade 15 can be assembled to the movable blade 14 by using the guide portion 82 formed on the lower side of the fixed blade 15 as a guide, the fixed blade 15 can be easily assembled to the movable blade 14. Can be done. Similarly, since the movable blade 14 can be assembled to the fixed blade 15 by using the guide portion 81 formed on the upper side of the fixed blade 15 as a guide, the movable blade 14 can be easily assembled to the fixed blade 15. .. Therefore, maintenance of the movable blade 14 and the fixed blade 15 can be facilitated.

(Example 4) FIG. 13 shows Example 4 of the present invention in which a part of the structure of the fixed blade 15 is modified. There, the blade body 42 is formed in a tapered crown shape so that the structural strength of the upper and lower middle portions of the blade body 42 can be enhanced. In addition, when using, the blade body 42 formed in the shape of a tapered crown can be pressed while denting the skin surface on the curved surface of the upper and lower parts of the blade body 42, so that when cutting the whiskers while pulling the skin surface with one hand and raising the hair. Similarly, short hairs, curly hairs and long hairs that have fallen along the skin surface can be effectively raised to preferably perform beard cutting.

(Example 5) FIG. 14 shows Example 5 of the present invention in which a part of the structure of the fixed blade 15 is modified. There, the blade body 42 is provided with a short hair cutting region Z1 that mainly cuts short hair and a long hair cutting region Z3 that mainly cuts curly hair and long hair. Specifically, the long hair cutting region Z3 was formed in a circular shape at the upper end of the fixed blade 15 in the axial direction, and the short hair cutting region Z1 was formed in a circular shape on the peripheral surface of the remaining fixed blade 15. (Z1> Z3) was made satisfactory with respect to the length of each cutting region Z1 and Z3 in the axial direction. According to such a fixed blade 15, the position of the fixed blade 15 that hits the skin surface is simply shifted along the axis P of the main body case 1, and the cutting region that hits the skin surface is quickly moved between the short hair cutting region Z1 and the long hair cutting region Z3. Can be changed to. Incidentally, in the electric razor of the first embodiment, it takes time and effort as much as it is necessary to change the gripping position of the main body case 1 in the circumferential direction to change the cutting area in contact with the skin surface. Further, since the long hair cutting region Z3 is provided on the upper end side (free end side) of the fixed blade 15, the posture and angle of the long hair cutting region Z3 when the long hair cutting region Z3 is applied to the portion where the long hair grows can be freely selected. it can. Therefore, the long hair that has fallen on the skin surface can be appropriately attracted to the blade hole 45, and the long hair can be cut more reliably. When the long hair cutting region Z3 is provided on the lower end side of the fixed blade 15, the short hair cutting region Z1 may hit the skin surface first and become an obstacle. Further, since the length of each cutting region Z1 and Z3 in the axial direction is (Z1> Z3), the region area of the frequently used short hair cutting region Z1 can be increased to increase the chance of cutting short hair. Therefore, the beard cutting can be performed effectively in a shorter time.

(Example 6) FIGS. 15 and 16 show Example 6 of the present invention in which the power transmission structure for transmitting the rotational power of the motor 8 to the movable blade 14 is modified. There, the motor 8 is arranged inside the base case 3, and the rotational power of the motor 8 is transmitted to the head side case 5 via the face gear 84 arranged on the central axis of the bending shaft 4. Specifically, as shown in FIG. 16, the drive gear 85 fixed to the output shaft of the reduction unit 9 is meshed with the face gear 84, and the passive gear 86 provided on the input end side of the flexible shaft 69 is meshed with the face gear 84. , The movable blade 14 can be rotationally driven. The rotational power of the passive gear 86 is transmitted to the driven gear 20 of the movable blade shaft 18 via the flexible shaft 69 and the drive gear 70. In the electric razor according to the sixth embodiment, since the motor 8 is arranged inside the base case 3 that also serves as a grip, the head side case 5 is not held in a state of being bent in the second posture. Further, when the head side case 5 swings and displaces between the first posture and the second posture, the motor lead that supplies the drive current to the motor 8 is not bent, so that the motor lead is not disconnected. it can.

In the sixth embodiment, the motor 8 is arranged inside the base case 3, but it is not necessary, and the power transmission structure for transmitting the rotational power of the motor 8 and the motor 8 to the movable blade 14 is the head of the main body case 1. It can be provided on the side case 5. In that case, for example, the drive gear 70 that directly connects the motor 8 and the movable blade shaft 18 or is fixed to the output shaft of the motor 8 or the reduction unit 9 drives the driven gear 20 of the movable blade shaft 18 to drive the movable blade 14 Can be rotationally driven, so that the power transmission structure for the movable blade 14 can be remarkably simplified and its cost can be reduced.

(Example 7) FIGS. 17 to 19 show an electric razor according to a seventh embodiment of the present invention. In this embodiment, the structure of the movable blade 14 is changed and the hair dust accumulating portion 27 is formed on the sleeve 89 assembled to the movable blade 14, which is significantly different from the electric razor of the first embodiment. The movable blade 14 includes a movable blade shaft 18 that supports three small blades 19, a driven gear 20 that is fixed to the lower end of the movable blade shaft 18, and a thrust ring 21 that is fixed to the upper end of the movable blade shaft 18. ing. The movable blade shaft 18 is made of a plastic molded product integrally provided with a cylindrical shaft main body 90 and a small blade mounting arm 91 projecting at three positions around the shaft main body 90, and is formed by a tip of the small blade mounting arm 91. The small blade 19 is caulked and fixed together with the U-shaped urging spring 93 to the small blade shafts 92 provided at four upper and lower positions. The small blade mounting arm 91 is inclined with respect to the rotation center axis of the movable blade 14, and its upper end is located on the upper side in the rotation direction from the lower end. The small blade 19 is formed of a flat plate-shaped blade body formed in a vertically long parallel quadrilateral shape, and a linear cutting blade 25 is formed on the lower side in the rotation direction thereof.

As shown in FIG. 19, the sleeve 89 includes a donut-shaped base end wall 94, three hair dust pockets 95 provided on the lower surface of the base end wall 94, and a bottom wall 96 continuous with the lower end of the hair dust pocket 95. It consists of a plastic molded product provided integrally. The hair dust pocket 95 integrally includes a partially arcuate peripheral wall 95a and a radial wall 95b that is continuous on the lower side in the rotational direction of the peripheral wall 95a, and is between the peripheral wall 95a and the radial wall 95b facing each other. The hair dust accumulation portion 27 has a V-shaped cross section. The hair dust pocket 95 of the sleeve 89 is inserted between the adjacent small blade mounting arms 91 from above the movable blade 14, and the base end wall 94 is received by the small blade mounting arm 91 and the upper ends of the small blade 19, and is a radial wall. By receiving the 95b with the small blade mounting arm 91, the sleeve 89 can be integrated with the movable blade 14. The cutting edge 25 of the small blade 19 in this state faces the free end of the peripheral wall 95a via a small gap E, and the hair cut by the small blade 19 is from the previous gap E to the hair dust accumulating portion 27. Get inside.

As described above, according to the movable blade 14 composed of the movable blade shaft 18 and the flat plate-shaped small blade 19, only the tip of the cutting blade 25 is in sliding contact with the fixed blade 15 on the inner surface to cut the whiskers. Compared with the movable blade of 1, the frictional resistance of the small blade 19 can be reduced to reduce the cutting load acting on the motor 8. Since the cutting edge 25 of the small blade 19 is inclined obliquely, the whiskers can be cut off, and therefore the whiskers can be cut sharply and sharply. Further, since the hair dust accumulating portion 27 is formed on the separately provided sleeve 89, the head cap 17 is separated from the movable blade support shaft 16 and the sleeve 89 is further removed from the movable blade 14 to be held by the hair dust accumulating portion 27. Most of the hair that has been removed can be easily washed away. Further, since the gap E between the cutting edge 25 and the free end of the peripheral wall 95a is small, it is possible to prevent the hair dust held in the hair dust accumulating portion 27 from jumping out from the gap E. In the electric razors of Examples 1 to 7 in which the movable blade 14 is composed of a rotary blade, the fixed blade 15 may be formed in a truncated cone shape.

In each of the above embodiments, the case where the movable blade 14 is a rotary blade has been described, but the electric razor can be carried out in a form in which the movable blade 101 is reciprocally driven to cut the whiskers. Specifically, as shown in FIGS. 20 and 21, the movable blade 101 is composed of a vertically long straight rod-shaped movable blade shaft 102 and six small blades 103 fixed at regular intervals along the movable blade shaft 102. To do. The movable blade shaft 102 is vertically slidably supported by a boss 104 provided at the center of the inner surface of the head cap 17 and a boss 105 provided on the upper wall of the head side case 5. The small blade 103 is formed in a disk shape, and cutting blades 106 are formed on the upper and lower edges of the peripheral surface thereof, and the peripheral surfaces other than the cutting blade 106 are recessed inward in the radial direction and are fixed blades. It has a structure that does not slide in contact with 15. The fixed blade 15 is composed of a blade main body 42 and a reinforcing ring 43 fixed to the lower end of the blade main body 42, and a screw portion 111 provided on the reinforcing ring 43 is provided in a screw hole on the inner peripheral surface of the mounting seat 54. By screwing into 112, it is integrated with the head side case 5. Since a group of cutting blades 44 and blade holes 45 is formed on the entire peripheral surface of the fixed blade 15, the disc-shaped small blade 103 and the cutting blade 44 cooperate with each other to make a whiskers on the entire peripheral surface of the fixed blade 15. Can be disconnected.

Similar to the electric razor of the sixth embodiment, the motor 8 is arranged inside the base case 3, and the rotational power of the motor 8 is transmitted to the head side case 5 via the face gear 84 arranged on the central axis of the bending shaft 4. To be transmitted to. Specifically, as shown in FIG. 21, the drive gear 85 fixed to the output shaft of the reduction unit 9 is meshed with the face gear 84, the rotational movement of the face gear 84 is converted into a reciprocating movement by the crankshaft 107, and the movable blade 101 Can be driven back and forth. The upper end of the crankshaft 107 is connected to the lower end of the movable blade shaft 102 by a pin 108 so as to be relatively tiltable, and the lower end of the crankshaft 107 is connected to the gear end surface of the face gear 84 by an eccentric pin 109 so as to be relatively tiltable. .. In order to allow the head-side case 5 to tilt back and forth, a relief groove 110 that tilts relative to the gear shaft of the drive gear 85 is formed on the side of the connecting arm 58. In FIGS. 20 and 21, the same members as those in each of the above embodiments are designated by the same reference numerals, and the description thereof will be omitted.

The electric razor configured as described above can perform whiskers cutting in the same manner as the electric razor described in each of the above embodiments, but since the whiskers are cut by reciprocating a large number of small blades 103, the whiskers are cut. The chance of contact between the small blade 103 and the whiskers can be increased, and the whiskers can be effectively cut.

1 Body case 2 Razor head 3 Base case 4 Bending shaft 5 Head side case 8 Motor 11 Finger hook protrusion 12 Bearing part 14 Movable blade 15 Fixed blade 16 Movable blade Support shaft 17 Head cap 18 Movable blade shaft 19 Small blade 19a Mounting base end 20 Driven gear 25 Cutting edge 26 Opening 27 Hair dust accumulation part 28 Cutting edge 31 Bearing
42 Blade body 43 Reinforcing ring 44 Cutting blade 45 Blade hole 60 Moderation spring 61 First moderator (moderation protrusion)
62 Second moderation body (moderation recess)
69 Flexible shaft 70 Drive gear 75 Illuminator 80 Reinforcement part 81 Guide part 82 Guide part 84 Face gear 85 Drive gear 86 Passive gear P Axis line Q Virtual reference line Z1 Short hair cutting area Z2 Cut hair cutting area Z3 Long hair cutting area θ1 Cutting edge angle θ2 Cutting edge angle

Claims (10)

It is equipped with a main body case (1) and a razor head (2) supported by the main body case (1).
The razor head (2) is provided with a movable blade (14) and a fixed blade (15) that surrounds the movable blade (14) in a sliding contact state .
The movable blade (14) includes a movable blade shaft (18) that is rotationally driven, and a plurality of small blades (19) that are mounted around the movable blade shaft (18).
An intermediate portion of the small blade (19) between the tip of the small blade (19) that is in sliding contact with the fixed blade (15) and the mounting base end (19a) of the small blade (19) that is fixed to the movable blade shaft (18). An electric razor characterized in that a hair dust accumulating portion (27) for storing hair chips cut by a small blade (19) is formed in the dent having a curved cross section . The first aspect of claim 1, wherein the mounting base end (19a) of the small blade (19) fixed to the movable blade shaft (18) is formed in a plane along the tangent line (T) of the peripheral surface of the movable blade shaft (18). Electric razor. When assuming a virtual reference line (Q) that is orthogonal to the tangent line (T) of the peripheral surface of the movable blade axis (18) and passes through the contact point of the tangent line (T).
Shaving debris accumulation section (27), the virtual reference line (Q) from the movable blade (14) electric shaver according to claim 1 or 2 are formed in concave free curved surface in the rotational direction opposite the direction of. The tip of the cutter blades (19), the electric shaver of claim 3, which issued collision rotational direction to direction of the virtual reference line (Q) from the movable blade (14). The small blade (19) is fixed from one end to the other end of the movable blade shaft (18).
The electric razor according to any one of claims 1 to 4, wherein the hair dust collecting portion (27) is inclined from one end side to the other end side of the movable blade shaft (18). The tip of the small blade (19) is provided parallel to the axis of the movable blade shaft (18).
The electric razor according to any one of claims 1 to 4, wherein the cutting blade (25) provided at the tip of the small blade (19) is formed in a continuous waveform. An opening (26) is formed in the small blade wall continuous with the cutting edge of the small blade (19).
The electric razor according to any one of claims 1 to 6, wherein a cutting edge (28) is formed on the opening edge of the opening (26) on the hair dust accumulating portion (27) side. The opening (26) is inclined with respect to the axis of the movable blade shaft (18).
The electric razor according to claim 7, wherein the cutting edge (28) formed on the opening edge of the opening (26) is inclined with respect to the axis of the movable blade axis (18). The seventh or eighth aspect of the present invention, wherein the cutting edge (25.28) is formed at the tip of the small blade (19) and the opening edge of the opening (26) on the hair dust accumulating portion (27) side, respectively. Electric razor. Claim that the cutting edge angle (θ1) of the cutting edge (25) provided at the tip of the small blade (19) is set to be larger than the cutting edge angle (θ2) of the cutting edge (28) formed in the opening (26). The electric razor according to 9.

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