JP5028433B2 - Electric razor - Google Patents

Description

  The present invention relates to an electric razor.

  Conventionally, an electric razor is known in which vibration is generated by a vibration generating structure in order to enhance the scissor cutting effect.

JP 2006-230662 A

  However, in the electric razor of the above-mentioned Patent Document 1, since the vibration generating structure is also driven by the motor that drives the inner blade of the shaving part, the place where the vibration generating structure is provided is restricted, and the load at the shaving part is limited. In some cases, it is difficult to obtain the effect due to vibration, for example, because vibration is suppressed by the fluctuation of.

  Then, an object of this invention is to obtain the electric shaver of the novel structure which can improve shaving performance more efficiently by vibration.

According to the first aspect of the present invention, there is provided a shave having a substantially rod-shaped main body portion and a head portion provided at one end portion in the longitudinal direction of the main body portion, and having a pair of blades that move relative to each other. In an electric razor provided with a bristle portion and a drive mechanism that drives at least one of the pair of blades, a vibration generating mechanism that generates vibrations in the vertical direction is provided in the head portion separately from the drive mechanism. An operation switching mechanism for switching between operation and stop of the vibration generating mechanism is provided.

  According to a second aspect of the present invention, a drive detection mechanism that detects an operation state of the drive mechanism is provided, and the operation switching mechanism detects the vibration when the operation of the drive mechanism is detected by the drive detection mechanism. The generation mechanism is operated.

  According to a third aspect of the present invention, there is provided a cleaning detection mechanism for detecting that the electric razor is being cleaned, and the operation switching mechanism is such that the electric razor is being cleaned by the cleaning detection mechanism. The vibration generating mechanism is stopped when detected.

  The invention according to claim 4 is characterized in that a manual switch for switching between operation and stop of the vibration generating mechanism is provided.

  The invention according to claim 5 is provided with a timer for measuring an operation time of the drive mechanism, and the operation switching mechanism operates the vibration generating mechanism when the operation time exceeds a predetermined value. And

  The invention of claim 6 further includes a frequency variable mechanism that changes the frequency of the vibration generating mechanism.

According to the first aspect of the present invention, since the vibration generating mechanism can be operated independently of the drive mechanism, the vibration generating mechanism that generates the vibration in the vertical direction is not easily affected by the drive mechanism. It becomes easy to obtain the shaving performance improvement effect. Further, by providing the operation switching mechanism for switching between the operation and the stop of the vibration generating mechanism, the effect of improving the shaving performance by vibration can be obtained more efficiently.

  According to the second aspect of the present invention, it is possible to operate the vibration generating mechanism by detecting that the shaving process is being performed by the operation of the driving mechanism, and therefore it is possible to reduce useless operations of the vibration generating mechanism.

  According to the third aspect of the present invention, the vibration generation mechanism can be stopped by detecting that the cleaning is being performed by the cleaning detection mechanism, so that the vibration generation mechanism can be operated more efficiently.

  According to the invention of claim 4, since the manual switch is provided, the user can select whether or not to operate the vibration generating mechanism.

  According to the fifth aspect of the present invention, it is possible to obtain the effect of improving the shaving performance by vibration during finishing shaving having a high brushing effect by vibration.

  According to the invention of claim 6, the shaving performance improvement effect by vibration can be obtained more efficiently by changing the frequency of the vibration generating mechanism by the variable frequency mechanism.

FIG. 1 is a perspective view of an electric razor according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the electric razor according to the embodiment of the present invention. FIG. 3 is a perspective view of the head portion of the electric razor according to the embodiment of the present invention, showing a state where the outer case is removed. FIG. 4 is a plan view of the head portion of the electric razor according to the embodiment of the present invention, showing a state where the outer case is removed. FIG. 5 is a perspective view showing components provided in the head part of the electric razor according to the embodiment of the present invention, wherein (a) is a drive mechanism, (b) is a vibration generating mechanism, and (c) is a trimmer. It is a figure which shows a unit. FIG. 6 is a perspective view of a vibration generating mechanism provided in the head portion of the electric razor according to the embodiment of the present invention. FIG. 7 is a side view of a vibration generating mechanism provided in the head portion of the electric razor according to the embodiment of the present invention. FIG. 8 is an exploded perspective view showing a part of the interposition part, the first link mechanism, and the head part included in the electric shaver according to the embodiment of the present invention. FIG. 9 is a perspective view showing a part of the second link mechanism, the interposition part, and the first link mechanism included in the electric shaver according to the embodiment of the present invention. FIG. 10 is a side view (viewed from the Y direction) showing a part of the second link mechanism, the interposition part, the first link mechanism, and the head part included in the electric shaver according to the embodiment of the present invention. . FIG. 11 is a front view (seen from the X direction) showing a part of the second link mechanism, the interposition part, the first link mechanism, and the head part included in the electric shaver according to the embodiment of the present invention. . FIG. 12 is a perspective view showing a part of the second link mechanism, the interposition part, the first link mechanism, and the head part included in the electric shaver according to the embodiment of the present invention (viewed from the main body part side in the Z direction). Figure). FIG. 13 is a diagram schematically illustrating an example of a circuit included in the electric shaver according to the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following, for convenience, the X direction in the figure is referred to as the front-rear direction, the Y direction as the left-right direction, and the Z direction as the up-down direction.

  As shown in FIG. 1, the electric shaver 1 according to this embodiment can swing on a main body 2 formed in a rod shape and an end 2 a on one side in the longitudinal direction of the main body 2 (upward in FIG. 1). And a head portion 3 attached to the head.

  Further, in the present embodiment, as shown in FIGS. 1 and 2, a protruding portion 2 b that bulges sideward (X direction) is formed at one end 2 a in the longitudinal direction of the main body 2. The head portion 3 is attached to the protruding portion 2b. The head portion 3 protrudes from the main body portion 2 in the Z direction in FIG. 1 and FIG. 2 (= projection direction, upper side in FIG. 1 and FIG. 2) in a free state where no swinging force is applied.

  As shown in FIGS. 2 and 3, the head portion 3 has a plurality of shaved portions 4 elongated in one direction (Y direction) substantially orthogonal to the protruding direction (Z direction) (two in this embodiment). Are provided parallel to each other. The shaving portion 4 serves as a pair of blades, an outer blade 4a (FIG. 2) formed in a mesh shape exposed at the protruding end of the head portion 3, and an inner blade 4b reciprocating in sliding contact with the inner surface of the outer blade 4a. (FIG. 3), and the hair introduced into the shaving portion 4 from the mesh opening of the outer blade 4a is sheared between the inner surface of the outer blade 4a and the outer surface of the inner blade 4b. It has become. The outer surface of the outer blade 4a becomes the contact surface 4c. In the present embodiment, the outer blade 4a is fixed to the head portion 3, while the inner blade 4b is reciprocated in the longitudinal direction (that is, the Y direction) of the shaving portion 4 by a drive mechanism 5 including, for example, a linear motor 5b. Driven by this, the outer blade 4a and the inner blade 4b which make a pair move relatively, and the said shearing action arises. In the present embodiment, the two inner blades 4b reciprocate in the Y direction with opposite phases.

  The head portion 3 includes a head case 3b (FIGS. 3 and 4) having a bottomed rectangular tube-shaped recess 3a and an outer case 3c (FIG. 2) covering the open side of the head case 3b. A driving mechanism 5 is accommodated in the recess 3a, and the inner blade 4b is mounted on the movable portion 5a of the driving mechanism 5, while the outer blade 4a is mounted on the outer case 3c. The outer case 3c to which the outer blade 4a is attached is covered and attached to the head case 3b to which the drive mechanism 5 and the inner blade 4b are attached, so that the inner blade 4b is inwardly connected to the outer blade 4a (see FIGS. 2 and 3). It can be pressed from below. The pressing force between the inner blade 4b and the outer blade 4a can be appropriately given by, for example, an urging mechanism 6 such as a coil spring attached to the movable portion 5a.

  As shown in FIGS. 3 and 4, in addition to the drive mechanism 5, a vibration generating mechanism 13 is housed and fixed in the recess 3 a of the head portion 3. As shown in FIGS. 5 to 7, the vibration generating mechanism 13 has a motor 13a for rotating the shaft 13d and a substantially semi-columnar eccentric weight 13b attached to the shaft 13d. It is assembled in a covered state. In such a configuration, by energizing the motor 13a and rotating the eccentric weight 13b, the position of the center of gravity of the vibration generating mechanism 13 can be changed to generate vibration. The vibration generating mechanism 13 has an elongated shape as a whole. In this embodiment, the longitudinal direction of the vibration generating mechanism 13 and the axial direction of the rotation axis Av of the motor 13a are the longitudinal direction of the shaved portion 4 (that is, the inner blade by the drive mechanism 5). 4b is fixed to the head unit 3 in a posture parallel to the reciprocating direction (Y direction). Therefore, the eccentric weight 13b rotates in the XZ plane (direction along the paper surface of FIG. 7) orthogonal to the Y direction, and vibration mainly occurs in the in-plane direction of the XZ plane.

  As shown in FIGS. 4 and 5, a trimmer unit 14 that is mainly used for hair adjustment, that is, for shaving or cutting long hair, is attached to the head portion 3 separately from the shaving portion 4. . The trimmer unit 14 has a generally flat and substantially rectangular shape as a whole. Have. The trimmer unit 14 is in a posture along the outer wall of the head unit 3 when not in use, and on the outer side of the head unit 3 around the rotation axis At along the Y direction with respect to the head unit 3 when used (see FIG. 4). It can be flipped up (upward). At the time of use, the connecting portion 14c is connected to the movable portion 5a of the driving mechanism 5, and at least one of the blades forming the blade unit 14b is reciprocated by the driving mechanism 5 via the connecting portion 14c. The hair introduced into the notch portion (not shown) of the saw blade is sheared.

  In the present embodiment, as shown in FIG. 4, the vibration generating mechanism 13 and the trimmer unit 14 are arranged on the opposite sides of the drive mechanism 5 and the shaving portion 4. Thereby, the weight balance of the head part 3 is improved.

  As shown in FIGS. 1 and 2, an operation unit 7 is provided on the surface of the main body unit 2, and the user operates and stops the drive mechanism 5 by operating the operation unit 7. Can be switched. In the main body 2, a battery as a power source for the drive mechanism 5, a converter for converting AC power into DC power, a circuit 20 (FIG. 13) for operating the drive mechanism 5 and the vibration generating mechanism 13, and the like are housed. . The user operates the operating portion 7 to operate the drive mechanism 5 to reciprocate the inner blade 4b, grip the main body portion 2, and touch the contact surface 4c of the outer blade 4a at the protruding end of the head portion 3. While pressing against the skin as a shaved surface, the electric razor 1 is moved along the skin to shave hair such as a heel. The vibration generating mechanism 13 may operate in conjunction with the drive mechanism 5 or may be provided with an operation unit for switching the operation of the vibration generating mechanism 13 separately.

  In the present embodiment, as shown in FIGS. 2 and 8, etc., the main body 2 is swingably supported between the main body 2 and the head 3, and the head 3 can be swung. A supporting interposition part 8 is provided. The interposition part 8 supports the head part 3 so as to be swingable about a first swing axis Ay substantially parallel to the longitudinal direction (that is, the Y direction) of the shaving part 4, and to the main body part 2, the head part 3. Is supported so as to be able to swing around a second swing axis Ax along a direction (X direction) that is substantially orthogonal to the projecting direction (that is, the Z direction) and perpendicular to the first swing axis Ay.

  The head unit 3 is supported by the interposition unit 8 via the first link mechanism 9. As shown in FIGS. 2 and 8, two first link mechanisms 9 are provided apart from each other in the longitudinal direction of the shaving portion 4 (that is, the Y direction). A substantially T-shaped first support arm 9a that is fixed to and protrudes in the Z direction, and one side of each first support arm 9a in the Z direction (the protruding end side of the head portion 3, the upper side in FIG. 8) And two first link arms 9b that are pivotably separated from each other in the X direction. On the other side in the Z direction (the main body 2 side, the lower side in FIG. 8) of the first link arm 9b, a substantially cylindrical projection 9c that protrudes toward the center side of the head portion 3 in the Y direction is provided. The protrusion 9c is provided with an enlarged diameter portion 9d. As shown in FIG. 12, on the other side in the Z direction of the head portion 3 (front side in FIG. 12), an uneven shape (for example, a semi-cylindrical recessed portion with a step) corresponding to the protrusion 9c and the enlarged diameter portion 9d is formed. A receiving portion 3d is formed. The protrusion 9c, the enlarged diameter portion 9d, and the receiving portion 3d are configured to be fitted while being close to each other in the Z direction while elastically deforming at least one of them, and in the present embodiment, these are fitted. In this state, the protrusion 9c and the enlarged diameter portion 9d are supported by the receiving portion 3d so as to be rotatable around the Y direction. That is, in the present embodiment, the first link arm 9b is rotatably connected to both the interposition part 8 and the main body part 2, respectively.

  Further, as shown in FIG. 8, the two first link mechanisms 9 have a left-right configuration, and the left and right first link mechanisms 9 have an intermediate portion 8 or a main body of the first link arm 9b. The corresponding ones of the connecting axes C11 to C14 along the Y direction with the portion 2 are arranged so as to be concentric.

  Therefore, in the present embodiment, as shown in FIG. 10, the first link mechanism 9 causes the head portion 3, the interposition portion 8 (the first support arm 9 a fixed to the intermediate portion 8), and the two first link arms 9 b. A flat four-joint link mechanism is constructed in which two nodes are rotatably coupled by four connecting shafts C11 to C14 that are all along the Y direction.

  And in this embodiment, as shown in FIG. 10, between the connection shafts C11 and C12 with the interposition part 8 (the 1st support arm 9a fixed to the interposition part 8 in this embodiment) of the 1st link arm 9b. The distance D11 is narrower than the distance D12 between the connecting shafts C13 and C14 with the head portion 3 of the first link arm 9b. Further, the line connecting the connecting axes C11 and C13 of one first link arm 9b and the connecting axes C12 and C14 of the other first link arm 9b with the line of sight from the Y direction (that is, the line of sight in FIG. 10). An intersection point I1 with L12 is a tip portion S in the protruding direction (Z direction) of the contact surface 4c of the outer blade 4a of the shaving portion 4 arranged on the Z direction protruding end side of the head portion 3 (in FIGS. 10 and 11). It is configured so as to be arranged close to the position (shown by a one-dot chain line). In such a configuration, the intersection I1 can be regarded as the first swing axis Ay in the state (free state) of FIG.

  Incidentally, in the first link mechanism 9 according to the present embodiment, as described above, the distance D11 is set to be narrower than the distance D12. However, when these are set to be the same distance, the first link mechanism is a parallelogram link mechanism. As a result, the contact surface 4c of the head portion 3 moves in parallel, and the swinging motion cannot be obtained. On the other hand, if the distance D11 is set larger than the distance D12, the first swing axis Ay is separated from the contact surface 4c, and therefore the contact surface 4c slides with the shaved surface when the head portion 3 swings. As a result, the oscillation resistance increases accordingly. That is, in the present embodiment, the distance D11 is made narrower than the distance D12, so that a smoother swing operation around the first swing axis Ay is obtained.

  As shown in FIG. 10, in the present embodiment, the vibration generating mechanism 13 is provided at a position separated from the first swing axis Ay. Specifically, the rotation axis Av of the vibration generating mechanism 13 is arranged away from the first swing axis Ay in the protruding direction (Z direction) from the main body portion 2 of the head portion 3, and the protruding portion It is also arranged apart from the direction (X direction) perpendicular to the direction (Z direction) and perpendicular to the extending direction (Y direction) of the first swing axis Ay.

  The first swing axis Ay is disposed close to the tip end portion S in the protruding direction (Z direction) of the contact surface 4c (FIGS. 1 and 2) of the outer blade 4a, and the vibration generating mechanism 13 is It is arranged away from the tip end portion S from the swing axis Ay. Further, the first swing axis Ay and the rotation axis Av of the vibration generating mechanism 13 are arranged parallel to each other along the Y direction.

  Therefore, in the present embodiment, the eccentric weight 13b (FIGS. 6, 7 and the like) is rotated in the R direction in FIG. 10 by the operation of the vibration generating mechanism 13, whereby the head portion 3 is moved relative to the main body portion 2. (In this embodiment, with respect to the interposition part 8), as shown by an arcuate arrow V in FIG. As described above, in this embodiment, by swinging and vibrating the head portion 3, the component in the protruding direction (Z direction) of the vibration strength of the head portion 3 can be reduced. Can be relaxed. Moreover, since the contact surface 4c of the outer blade 4a of the shaving part 4 will reciprocately vibrate along a to-be-shaved surface, the effect which raises hair can be heightened and shaving performance can be improved. it can. Furthermore, the effect of reducing the friction between the contact surface 4c and the shaved surface can also be obtained.

  In the present embodiment, as described above, since the vibration generating mechanism 13 is disposed away from the first swing axis Ay in the X direction and the Z direction, a long swing vibration moment arm is ensured. And can generate vibrations efficiently. Here, in order to reduce the sliding resistance associated with the swing of the head portion 3, the first swing shaft Ay is preferably disposed on the protruding end side (one side) of the head portion 3 in the protruding direction (Z direction). Therefore, it is preferable that the vibration generating mechanism 13 is disposed close to the base end side (the other side) in the protruding direction of the head portion 3 and close to the one side in the X direction.

  Furthermore, in this embodiment, the operation direction (Y direction) of the inner blade 4b of the shaving part 4 and the vibration direction (XZ in-plane direction) of the vibration generating mechanism 13 are different. If the operation direction of the inner blade 4b and the vibration direction of the vibration generating mechanism 13 coincide with each other, the reciprocation and vibration of the inner blade 4b may interfere with each other, and either one of the performances may be impaired. In the embodiment, such a phenomenon can be suppressed by making these directions different.

  In the present embodiment, as shown in FIGS. 3, 8, 10, 12, etc., the thin slit 3e that penetrates in the Z direction at both ends of the head case 3b in the Y direction and is substantially orthogonal to the Y direction. The first support arm 9a and the first link arm 9b are inserted through the slit 3e from the other side in the Z direction (the lower side in FIGS. 8 and 10) to penetrate the head case 3b in the Z direction. . With this configuration, the connecting shafts C11 and C13 with the interposition part 8 as described above are arranged on one side in the Z direction (the projecting end side of the head part 3) with respect to the connecting shafts C12 and C14 with the head part 3, and the intersection I1 (the first point) One oscillating shaft Ay) is arranged close to the tip end portion S in the protruding direction (Z direction) of the contact surface 4c (see FIG. 10), and the assembly of the first link mechanism 9 is improved. Yes.

  Furthermore, in this embodiment, as shown in FIG. 12, the first support arm 9a is crossed with a virtual plane Py (see FIG. 12, XZ plane) orthogonal to the first swing axis Ay (in this embodiment, orthogonal). A mounting portion 9e having a flat surface portion (a surface that is the back side of the mounting portion 9e in the line of sight of FIG. 12) is provided. It was fixed using. According to such a configuration, the force acting on the mounting portion of the first support arm 9a along with the swing can be received at the portion where the flat surface portion and the interposition portion 8 abut against each other. Even if the first support arm 9a is fixed with the screw 10, the screw 10 can be prevented from loosening due to the swinging of the head portion 3 by suppressing the displacement of the 9a with respect to the interposition part 8.

  The interposition part 8 is supported by the main body part 2 via the second link mechanism 11. As shown in FIG. 2, the second link mechanism 11 is fixed by being screwed, fitted, or the like to the protrusion 2 b in a state of being accommodated in the recess 2 c formed in the protrusion 2 b of the main body 2. Is done. Further, as shown in FIGS. 2, 9, 12 and the like, the second link mechanism 11 includes a substantially rectangular flat base portion 11a and one side in the Z direction from the both ends in the X direction of the base portion 11a (the head). Two second support arms 11b projecting in a substantially Y shape toward the projecting end side of the portion 3, and two second link arms 11c constructed between the two second support arms 11b. Have. The two second link arms 11c are spaced apart from each other in the Y direction, and can be rotated on the second support arm 11b by connecting shafts C21 and C22 (FIG. 11) along the X direction. It is connected.

  Further, the second link arm 11c is formed in a substantially U shape with a line of sight from the Y direction, and the open side portion of the U shape is rotatably supported by the second support arm 11b. The interposition part 8 is rotatably attached to the bottom part 11d. In the present embodiment, a substantially columnar bottom portion 11d is installed between the pair of side portions 11e of the second link arm 11c so as to be rotatable around its axis, and the bottom portion 11d is connected to the bottom portion of the interposition portion 8. The receiving portion 8a formed as a substantially cylindrical concave portion is brought close to the other side in the Z direction (front side in FIG. 12), and is fitted and attached to the receiving portion 8a. That is, in the present embodiment, the central axis of the bottom portion 11d is the connection axes C23 and C24 (FIG. 11) along the X direction.

  Therefore, in the present embodiment, as shown in FIG. 11, the second link mechanism 11 causes the intervening portion 8, the main body portion 2 (second support arm 11 b fixed to the body portion 2), and the two second link arms 11 c to be four. A flat four-joint link mechanism is constructed in which two nodes are rotatably connected by four connecting shafts C21 to C24 along the X direction.

  As shown in FIG. 11, the second link mechanism 11 also has the main body 2 of the second link arm 11 c (in this embodiment, fixed to the main body 2 in the same manner as the first link mechanism 9). The distance D21 between the connecting shafts C21 and C22 with the two support arms 11b) is narrower than the distance D22 between the connecting shafts C23 and C24 with the interposition part 8 of the second link arm 11c. Further, the line connecting the connecting axes C11 and C13 of the one second link arm 11c and the connecting axes C22 and C24 of the other second link arm 11c with the line of sight from the X direction (that is, the line of sight in FIG. 11). The intersection I2 with L22 is arranged farther from the position of the tip end portion S in the protruding direction (Z direction) of the contact surface 4c of the outer blade 4a of the shaving portion 4 than the intersection I1 related to the first link arm 9b. is there. In such a configuration, the intersection point I2 can be regarded as the second swing axis Ax in the state (free state) of FIG.

  That is, in the present embodiment, the second swing axis Ax (intersection point I2) is disposed away from the tip end portion S in the protruding direction (Z direction) of the contact surface 4c with the shaved surface of the shaved portion 4. When the head unit 3 swings around the second swing axis Ax, the contact surface 4c moves (slids) along the shaved surface, and swing resistance is generated.

  Here, in the electric razor 1 in which the shaving portion 4 is elongated along the Y direction as in the present embodiment, the moment arm Amx (FIG. 11) in the oscillation of the head portion 3 around the second oscillation axis Ax is Since it is longer than the moment arm Amy (FIG. 10) in the swing around one swing axis Ay, the swing torque (rotational moment) Mx (FIG. 11) around the second swing axis Ax is the first swing axis Ay. It tends to be larger than the swing torque (rotational moment) My (FIG. 10). Therefore, in the state where no countermeasures are taken, the head portion 3 is likely to swing around the first swing axis Ay and is less likely to swing around the second swing axis Ax, and the head portion 3 is shaved. When moving along the hair surface, there is a possibility that the followability of the swing of the head unit 3 with respect to the unevenness is lowered.

  In this regard, in the present embodiment, as described above, the second swing axis Ax (intersection point I2) is more in contact with the shaved surface of the shaving portion 4 than the first swing axis Ay (intersection point I1). By disposing the head portion 3 away from the surface 4c, the contact surface 4c and the shaved surface slide with each other as the head portion 3 swings, and the head portion 3 moves around the second swing axis Ax. Since the swinging (sliding) resistance can be increased, it is possible to suppress the head unit 3 from being easily swung only around the second swinging axis Ax, and the followability of the head unit 3 with respect to the shaved surface is improved. Can be increased.

  Furthermore, in the present embodiment, as shown in FIG. 10, a reaction force is applied between the main body 2 (the base portion 11 a in the present embodiment) and the interposition part 8 with respect to the swinging of the head part 3 with respect to the interposition part 8. As the second urging mechanism, a coil spring 12 as an elastic member was installed from one side to the other side in the direction along the second swing axis Ax. Therefore, it is possible to further prevent the head portion 3 from easily swinging only around the second swing axis Ax by securing a required swing reaction force around the second swing axis Ax by the coil spring 12. Further, by arranging the coil spring 12 along the second swing axis Ax, it becomes easy to secure the length of the coil spring 12, and accordingly, the degree of freedom in setting the swing reaction force can be increased.

  Moreover, in this embodiment, since the coil spring 12 as a 2nd biasing mechanism was attached between the base part 11a and the interposition part 8, when the 2nd link mechanism 11 and the interposition part 8 are assembled, the coil spring 12 is attached. A state in which the second urging mechanism is interposed between the main body part 2 and the interposition part 8 by fixing the assembly (the base part 11a of the second link mechanism 11) to the main body part 2 in advance. Can be obtained. With such a configuration, it is possible to reduce the labor of the mounting work as compared with the case where the second urging mechanism is directly interposed between the main body portion 2 and the interposition portion 8.

  Further, in the present embodiment, as shown in FIGS. 2, 8, 9, 11, 12, and the like, the interposition part 8 also has the first link mechanism 9 and the head case 3b as in the case of the first link mechanism 9 and the head case 3b. A slit 8b is formed so as to pass through the second support arm 11b and the second link arm 11c, and the second support arm 11b and the second link arm 11c are moved from the other side in the Z direction (lower side of FIGS. 8, 9, and 11). It is configured to pass through the slit 8b and penetrate the interposition part 8 in the Z direction. With this configuration, the connecting shafts C11 and C13 with the interposition part 8 as described above are arranged on one side in the Z direction (the projecting end side of the head part 3) with respect to the connecting shafts C12 and C14 with the head part 3, and the intersection I1 (the first point) Assembling performance of the first link mechanism 9 is improved while realizing a layout (FIG. 10) in which one swinging shaft Ay) is disposed close to the contact surface 4c.

  Next, the configuration and operation of the circuit 20 will be described with reference to FIG. In the circuit 20, the DC power source 21 is connected in parallel to the linear motor LM (5 b) included in the drive mechanism 5 that drives the inner blade 4 b and the motor RM (13 a) included in the vibration generating mechanism 13. The motor LM (5b) and the motor RM (13a) are shared. The operation and stop of the linear motor LM (5b) are controlled by the control box G2.

  The motor RM (13a) is configured as a DC motor that is rotationally driven by a DC power source 21 such as a battery, and the power supply from the DC power source 21 to the motor RM is switched by the transistor Tr1. That is, when the transistor Tr1 is turned on by the control current output from the control box G1 and a predetermined drive current flows through the motor RM, the motor RM rotates. In the present embodiment, the control box G1 corresponds to an operation switching mechanism that switches operation and stop of the vibration generating mechanism 13. R1 is a fixed resistor.

  In this embodiment, the operation of the control box G1 as the operation switching mechanism can be switched by the manual switch 31, the cleaning detection mechanism 32, the current detection mechanism 33, the timer 34, and the like.

  Regarding the manual switch 31, for example, an operator (not shown) of the manual switch 31 is provided to be exposed on the surface of the case of the main body 2 or the head 3, and the user operates the operator to vibrate. It can be configured so that it can be selected whether or not the generating mechanism 13 is operated.

  The cleaning detection mechanism 32 detects that the electric razor 1 is being cleaned by being attached to a cleaning device (not shown). As an example, the drive current of the linear motor LM is equal to or greater than a predetermined value. A current sensor (not shown) for detecting this and a switch (not shown) for detecting that the electric razor 1 is attached to the cleaning device, and the electric razor 1 attached to the cleaning device is It can be detected that the linear motor LM is operating for cleaning as being cleaned. When the cleaning device includes a cleaning mechanism separately from the linear motor LM, an operation signal of the cleaning mechanism may be transmitted to the electric razor 1. Further, when the cleaning detection mechanism 32 detects that the cleaning is being performed, the motor RM (13a) may be stopped in order to suppress the generation of sound or vibration, and the cleaning effect may be increased. It is also possible to configure the motor RM (13a) to operate.

  As an example, the current detection mechanism 33 is configured to have a current sensor (not shown) that detects the drive current of the linear motor LM, and when a drive current of a predetermined value or more is detected by the current sensor. Assuming that the linear motor LM is in operation, the vibration generating mechanism 13 can be operated in conjunction with the operation of the linear motor LM. In the present embodiment, the current detection mechanism 33 corresponds to a drive detection mechanism.

  In addition, the operation time (elapsed time from the start of operation) of the linear motor LM (5b) is measured by the timer 34, and the vibration generating mechanism 13 is activated when the operation time exceeds a predetermined value (for example, 3 minutes). It can be configured to operate. If it carries out like this, a vibration can be produced by the vibration generation mechanism 13 at the time of finishing shaving with a high raising effect by vibration.

  Further, the circuit 20 includes a drive voltage setting circuit 22 that variably sets the drive voltage of the motor RM (13a). The drive voltage setting circuit 22 is provided in parallel with the motor RM, and a variable resistor VR that can variably set the resistances R2 and R3 (ratio) on both sides of the intermediate point CP by adjusting an operation element such as a dial (not shown). And a transistor Tr2 that is turned on by a current branched from the point CP. When the transistor Tr2 is turned on, a current flows through the bypass 23, and the transistor Tr1 is turned off.

  Accordingly, a pulse-shaped control current having an appropriate constant frequency is output from the control box G1, and the duty ratio of the drive current is changed by changing the setting of the variable resistor VR, thereby changing the drive voltage of the motor RM. Can be set (PWM control). That is, as the resistance R3 is decreased, the transistor Tr2 is less likely to be turned on and the transistor Tr1 is less likely to be turned off, and the potential at the point VM, that is, the driving voltage of the motor RM is increased. Therefore, in this case, the rotational speed of the motor RM is increased. On the other hand, as the resistance R3 is increased, the transistor Tr2 is easily turned on and the transistor Tr1 is easily turned off, and the potential at the point VM, that is, the driving voltage of the motor RM is lowered. Therefore, in this case, the rotation speed of the motor RM is low. In the present embodiment, the operation element and the drive voltage setting circuit 22 correspond to a mechanism that variably sets the rotation number of the motor RM (13a), that is, a frequency variable mechanism that changes the frequency of the vibration generating mechanism 13. The operator may be provided in the case of the main body 2 or may be configured so that the user can adjust it by exposing a knob or the like on the surface of the case. In the latter case, it may be possible to variably set in several predetermined stages, or continuously variably set.

  As described above, according to the present embodiment, since the vibration generating mechanism 13 can be operated independently of the drive mechanism 5, the vibration generating mechanism 13 is hardly affected by the drive mechanism 5. It becomes easy to obtain the effect of improving shaving performance by vibration. Further, by providing the control box G1 as an operation switching mechanism for switching between operation and stop of the vibration generating mechanism 13, the effect of improving the shaving performance by vibration can be obtained more efficiently.

  Further, according to the present embodiment, since the current detection mechanism 33 as the drive detection mechanism can detect that the shaving process is being performed by the operation of the drive mechanism 5 and operate the vibration generation mechanism 13, The useless operation of the mechanism 13 can be reduced.

  Further, according to the present embodiment, the vibration generation mechanism 13 can be stopped by detecting that the cleaning is being performed by the cleaning detection mechanism 32, and thus the vibration generation mechanism 13 can be operated more efficiently.

  According to the present embodiment, since the manual switch 31 is provided, the user can arbitrarily select whether or not to operate the vibration generating mechanism 13.

  Further, according to the present embodiment, since the timer 34 is provided, it is possible to obtain a shaving performance improvement effect due to vibration at the time of finishing shaving with a high brushing effect due to vibration.

  Moreover, according to this embodiment, the shaving performance improvement effect by vibration can be obtained still more efficiently by changing the frequency of the vibration generating mechanism 13 by the drive voltage setting circuit 22 as a frequency variable mechanism. .

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made. For example, in the above-described embodiment, the vibration generating mechanism that rotates the eccentric weight by the rotating motor is provided. However, the vibration generating mechanism is not limited to this, and may be a reciprocating vibration mechanism or a mechanism other than the rotating motor. (For example, an ultrasonic transducer or the like) may be used.

  The vibration generating mechanism is preferably capable of generating a vibration including a circumferential component of the swing shaft from the viewpoint of generating a swing vibration around the swing shaft. In such a case, the vibration may be configured to include vibration in a direction corresponding to the position of the swing shaft and the twist.

  The present invention can also be applied to a type of electric razor in which the head portion does not swing relative to the main body portion, and is a type in which the head portion is supported by the main body portion so as to be directly swingable without the interposition portion. It is also applicable to other electric razors. Further, the blade driving method is not limited to the above embodiment, and the present invention can be applied to, for example, a rotary blade type electric shaver.

  The circuit configuration is not limited to the above embodiment, and various modifications can be made.

DESCRIPTION OF SYMBOLS 1 Electric razor 2 Main-body part 2a End part 3 Head part 4 Shaving part 4a Outer blade (blade)
4b Inner blade (blade)
5 Drive Mechanism 13 Vibration Generation Mechanism 31 Manual Switch 32 Cleaning Detection Mechanism 33 Current Detection Mechanism (Drive Detection Mechanism)
34 Timer 22 Drive voltage setting circuit (frequency variable mechanism)
G1 control box (motion switching mechanism)

Claims (6)

A substantially bar-shaped main body part, and a head part provided at one end in the longitudinal direction of the main body part, and a shaving part having a pair of blades that move relative to the head part, and the pair of blades In an electric razor provided with a drive mechanism for driving at least one of them,
In addition to the drive mechanism, the head unit is provided with a vibration generating mechanism that generates vibrations in the vertical direction ,
An electric shaver comprising an operation switching mechanism for switching between operation and stop of the vibration generating mechanism. A drive detection mechanism for detecting an operation state of the drive mechanism;
The electric shaver according to claim 1, wherein the operation switching mechanism operates the vibration generating mechanism when the operation of the drive mechanism is detected by the drive detection mechanism. A cleaning detection mechanism for detecting that the electric razor is being cleaned;
The electric shaver according to claim 1 or 2, wherein the operation switching mechanism stops the vibration generating mechanism when the cleaning detection mechanism detects that the electric shaver is being cleaned.   The electric shaver according to any one of claims 1 to 3, further comprising a manual switch for switching between operation and stop of the vibration generating mechanism. A timer for measuring the operating time of the drive mechanism;
The electric shaver according to any one of claims 1 to 4, wherein the operation switching mechanism operates the vibration generating mechanism when the operation time exceeds a predetermined value.   The electric shaver according to any one of claims 1 to 5, further comprising a frequency variable mechanism that changes a frequency of the vibration generating mechanism.

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