JP6478772B2 - Electric razor - Google Patents

Description

  The present invention relates to an electric razor including a vibration generating structure that vibrates a cutting blade provided in a razor head.

  This type of electric shaver is known, for example, from Patent Document 1 according to the proposal of the present applicant. There, a vibration generating mechanism is constituted by hemispherical minute protrusions provided on both side surfaces of the rotary inner blade and guide pins provided on a bearing wall facing the minute protrusions. The microprotrusions are arranged at regular intervals in the circumferential direction. When one microprotrusion gets over the corresponding guide pin, the inner blade moves to the right away from the guide pin, and the other microprotrusion is the corresponding guide pin. When moving over, the inner blade moves to the left in the direction away from the guide pin. In this way, the inner blade is moved left and right while being driven to rotate, thereby causing the inner blade to exert a cutting action and improving the sharpness.

JP 2006-81710 A (paragraph number 0027, FIG. 1)

  In the electric razor of Patent Document 1, a rotating microprojection is relatively pushed out by a guide pin, and the inner blade is mechanically and forcibly moved left and right. In such a vibration generating mechanism, a large frictional resistance is generated between the minute projection and the guide pin, so the guide pin and the minute projection are likely to be worn relatively early, and the moving stroke of the inner blade in the left-right direction gradually decreases. The drawing effect tends to fade. Compared to an electric razor that does not have an oscillating mechanism, the amount of power consumption increases by the rotational resistance of the oscillating mechanism, and there is also a problem in which a tapping sound is generated continuously when a microprojection collides with a guide pin. .

  An object of the present invention is to provide an electric razor capable of effectively cutting a whisker by vibrating an inner blade while reducing frictional resistance when vibration is generated.

  The electric razor according to the present invention has a main body case 1 that also serves as a grip and a razor head 2, and includes a cutting blade 7 that is driven by motor power to the razor head 2, and a vibrator 170 that applies vibration to the cutting blade 7. It is provided. A part of the vibration generator 170 is in sliding contact with the sliding contact surface 7A of the cutting blade 7, and elastic deformation caused by sliding resistance between the vibration generator 170 and the sliding contact surface 7A and a deformation releasing operation by its own elastic force. Provide for vibration. The beard cutting is performed by transmitting the vibration of the vibrator 170 to the cutting blade 7.

  The vibration exciter 170 includes a fixing portion 171 provided at one end thereof, an intermediate arm 172 extending from the fixing portion 171, and a sliding contact portion 173 provided at an end portion of the intermediate arm 172 and pressed against the sliding contact surface 7A. It is formed in a strip shape. The fixing portion 171 is fixed to the mounting wall 153 facing the cutting blade 7.

  When a virtual center line connecting the fixed portion 171 and the sliding contact portion 173 at the shortest distance is assumed, the middle portion of the intermediate arm 172 is formed in a non-linear shape via a position away from the virtual center line. For example, the intermediate arm 172 is formed in a curved shape as shown in FIG. 1, or is formed in a mountain-like shape as shown in FIG.

  A rotary inner blade 7 and an outer blade 8 are arranged on the razor head 2. The sliding contact portion 173 of the vibrating body 170 is pressed against the sliding contact surface 7A provided on the side end surface of the inner blade 7.

  One end of the inner blade shaft 7a of the inner blade 7 is pivotally supported by the inner blade holder 9 (see FIG. 7). The fixing portion 171 of the vibrator 170 is fixed to the inner blade holder 9.

  As shown in FIG. 15, the inner blade holder 9 includes a holder frame 151 that supports the inner blade shaft 7 a and a frame cover 152 that covers the outer surface of the holder frame 151. A fixing portion 171 and an intermediate arm 172 of the vibration generating body 170 are disposed along the surface of the holder frame 151 facing the frame cover 152.

  A sliding contact 163 is formed on the wall surface of the holder frame 151 that faces the side end surface of the inner blade 7. The sliding contact portion 173 of the vibration generator 170 is brought into pressure contact with the sliding contact surface 7 </ b> A provided on the side end surface of the inner blade 7 through the sliding contact port 163.

  The intermediate arm 172 of the vibrator 170 is formed in a curved shape along a concentric circle concentric with the inner blade shaft 7 a of the inner blade 7.

  The sliding contact portion 173 of the vibration generator 170 includes a sliding contact arm 180 that is bent toward the side end surface of the inner blade 7 continuously to the intermediate arm 172, and a distal end of the sliding contact arm 180 is bent into a V shape. The sliding contact claw 181 is formed (see FIG. 17). The sliding contact claw 181 is pressed against the sliding contact surface 7 </ b> A on the side end surface of the inner blade 7.

  The fixed portion 171 and the sliding contact portion 173 of the vibration generator 170 are arranged on the diameter line of the inner blade 7 passing through the inner blade shaft 7a with the inner blade shaft 7a facing each other. The sliding contact portion 173 of the vibration generator 170 is disposed on the upper side in the rotational direction of the inner blade 7 from the fixed portion 171.

  The sliding contact portion 173 of the vibration generator 170 is in pressure contact with the periphery of the end wall 7 b provided on the side end surface of the inner blade 7.

  A rotation stopper piece 174 is folded and formed on the fixing portion 171 of the vibration generator 170. The rotation stop piece 174 is joined to the horizontal frame portion 154 of the holder frame 151, and the vibration generator 170 is held and fixed so as not to rotate (see FIG. 1).

  A rotation recess 176 is formed on the periphery of the fixing portion 171 of the vibration generator 170. The rotation recess 176 is engaged with the rotation protrusion 165 of the holder frame 151 to hold and fix the vibration generator 170 in a non-rotatable manner.

  Between the vibration generator 170 and the sliding contact surface 7A of the cutting blade 7, a buffer sheet 182 for relaxing the sound pressure level of the hitting sound is disposed.

  One end of the inner blade shaft 7a of the inner blade 7 is pivotally supported by the inner blade holder 9, the buffer sheet 182 is formed in a circular shape, and an insertion hole 183 is formed in the center of the inner blade shaft 7a.

  An intermediate arm 172 and a sliding contact portion 173 are provided integrally with the fixing portion 171 of the vibration generator 170. As shown in FIG. 20, the sliding contact portion 173 is in pressure contact with the sliding contact surface 7 </ b> A of the peripheral surface of the inner blade shaft 7 a of the inner blade 7.

  The razor head 2 is provided with a drive unit T2 that transmits rotational power to the cutting blade 7. One end of the inner blade shaft 7a is engaged and connected to the final stage drive body 111 of the drive unit T2, and the rotational power of the final stage drive body 111 is transmitted to the inner blade 7. As shown in FIG. 7, the inner blade holder 9 is detachably attached to a head block 28 provided on the razor head 2. The other end of the inner blade shaft 7 a and the vibrating body 170 are attached to the inner blade holder 9. As a result, the inner blade 7 and the vibrator 170 can be attached to and detached from the head block 28 together with the inner blade holder 9.

  The final stage drive body 111 of the drive unit T2 is rotatably supported by the bearing body 57. A shaft coupling that connects the inner blade shaft 7a and the final stage drive body 111 is constituted by a joint shaft portion 116 provided on the inner blade shaft 7a and a joint hole 118 provided inside the final stage drive body 111 (FIG. 13). reference). The joint shaft portion 116 and the joint hole portion 118 are engaged at the inner center corresponding to the meshing peripheral surface of the final stage drive body 111. When the power transmission element is a timing belt, the meshing peripheral surface means the peripheral surface on which the pulley gear of the final stage drive body 111 that meshes with the belt is formed, and the power transmission element is a gear. Means the gear formation peripheral surface of the final stage drive body 111 which meshes with a gear.

  A bearing hole 117 and a joint hole 118 for supporting the inner blade shaft 7 a are formed in the final stage drive body 111. On the opening end side of the bearing hole 117, an introduction guide hole 119 for engaging and guiding the shaft end of the inner blade shaft 7a toward the bearing hole 117 is formed in a tapered shape.

  The head block 28 includes an upper frame 35. An inner blade lock structure is provided between the inner blade holder 9 and the upper frame 35 to prevent the inner blade 7 and the inner blade holder 9 from moving away from the final stage driving body 111 (see FIG. 5).

  An inner blade engagement structure is provided between the inner blade holder 9 and the head block 28 for slidingly mounting the inner blade holder 9 in a state where the inner blade 7 is cantilevered. The inner blade engaging structure includes a pair of front and rear support frames 122 provided on the upper surface of the upper frame 35, a frame support 123 formed on the opposing surface of the support frame 122, and an inner blade holder disposed below the inner blade 7. 9 is provided with a connecting body 124 protruding in parallel with the inner blade shaft 7a. The coupling body 124 inserted from one side of the support frame 122 is engaged with the frame support body 123 to integrate the inner blade holder 9 with the upper frame 35. A dimension L from the inner blade holder 9 to the protruding end of the coupling body 124 is set smaller than a dimension L1 from the inner blade holder 9 to the protruding end of the joint shaft portion 116 of the inner blade shaft 7a (see FIG. 7).

  The dimension L from the inner blade holder 9 to the protruding end of the coupling body 124 is set to be smaller than the left and right length L2 of the cutting blade surface of the inner blade 7.

  As shown in FIG. 11, the drive unit T2 that transmits rotational power to the cutting blade 7 includes a drive pulley 110, a driven pulley 111, a belt 112 wound around both the pulleys 110 and 111, and both pulleys 110 and 111. The restriction plate 113 is disposed on the outer surface and restricts the lateral movement of the belt 112.

  A pulley receiving wall 140 is provided on the restriction plate 113. At least one outer surface of the driving pulley 110 and the driven pulley 111 is received by the pulley receiving wall 140.

  Pulley receiving walls 140 are provided above and below the restriction plate 113. A heat radiating hole 142 is opened at the center of the pulley receiving wall 140 that receives the outer surfaces of the driving pulley 110 and the driven pulley 111.

  As shown in FIG. 12, the side frame 30 fixed to one side of the head block 28 includes a frame frame 30a and a frame cover 30b. The outer side of the winding transmission mechanism arranged on the outer surface of the frame 30a is covered with a frame cover 30b. A heat radiating hole 146 is formed in the wall surface of the frame cover 30 b that faces the heat radiating hole 142.

  The front and rear edges of the sheet-like outer cutter 8 are fixed to the outer cutter frame 61. The outer blade 8 is supported by the outer blade holder 31 via the outer blade frame 61 so as to be floatable up and down. Outer blade springs 62 that place the outer blade 8 in close contact with the inner blade 7 are arranged between the both side ends of the outer blade frame 61 and the outer blade holder 31.

  As shown in FIGS. 18 and 19, a compression coil type outer blade spring 62 is provided between upper and lower opposed spring receivers 194 and 196 provided on both inner surface sides of the outer blade holder 31 and both sides of the outer blade frame 61. Deploy. Stoppers 195 that are received by the spring receivers 196 of the outer blade holder 31 are provided on both sides of the outer blade frame 61.

  Portal stopper arms 192 that are elastically deformable in the left-right direction are provided on both sides of the outer cutter frame 61. A stopper 195 is provided at the free end of the stopper arm 192.

  The spring receiver 196 of the outer blade holder 31 engages with the internal space of the portal stopper arm 192 to guide the outer blade frame 61 so as to be slidable up and down.

  In the electric razor according to the present invention, the cutting blade 7 and the vibrator 170 are provided on the razor head 2. Further, a part of the vibration generator 170 is in sliding contact with the sliding contact surface 7A of the cutting blade 7, elastic deformation accompanying sliding contact resistance between the vibration generator 170 and the cutting blade 7, and a deformation releasing operation by its own elastic force. Enabled to vibrate. Thus, when the vibration generator 170 is vibrated by the action of the sliding contact resistance between the vibration generator 170 and the sliding contact surface 7A and its own elastic force, the cutting blade 7 is mechanically and forcibly moved left and right. Compared to the conventional vibration generating structure, the inner blade 7 can be vibrated while remarkably reducing the frictional resistance at the time of vibration occurrence, and there is almost no need to consider deterioration over time. Since the whiskers can be cut while the cutting blade 7 is forced to vibrate by the vibration applied from the vibrator 170, the cutting blade 7 can be cut more than when the whiskers are cut only by the shearing action of the cutting blade 7. By making the movement of the blade portion complex, it is possible to effectively perform whisker cutting. Depending on the vibration direction of the vibrator 170 applied to the cutting blade 7, the cutting blade 7 can perform whisker cutting effectively while exhibiting a cutting effect.

  The vibration generator 170 is formed in a band shape including the fixing portion 171 and the intermediate arm 172, and the sliding contact portion 173 pressed against the sliding contact surface 7A, and the vibration generator 170 fixes the fixing portion 171 to the mounting wall 153 facing the cutting blade 7. According to the structure, since the sliding contact portion 173 and the intermediate arm 172 can be vibrated in a state where the vibrator 170 is securely fixed to the mounting wall 153, strong energy vibration can be applied to the cutting blade 7. Further, the exciter 170 can be reduced in size and made compact as much as vibrations with stronger energy can be applied.

  According to the vibrator 170 that forms the middle part of the intermediate arm 172 in a non-linear manner via a position away from the virtual center line that connects the fixed part 171 and the sliding contact part 173 at the shortest distance, the fixed part 171 By increasing the total length of the intermediate arm 172 and the sliding contact portion 173, the vibration generator 170 can be easily vibrated. Further, the total weight of the portion that vibrates by the larger total length from the fixed portion 171 to the sliding contact portion 173 via the intermediate arm 172 can be increased, and stronger vibration can be applied to the cutting blade 7.

  According to the vibration generating structure in which the rotary inner blade 7 and the outer blade 8 are arranged on the razor head 2 and the sliding contact portion 173 of the vibration generating body 170 is pressed against the sliding contact surface 7A provided on the side end surface of the inner blade 7. The whisker can be cut while vibrating the inner blade 7 in the axial direction of the inner blade shaft 7a. In such a cutting form, since the inner blade 7 performs the whisker cutting while exhibiting the cutting action, the sharpness at the time of cutting the beard is improved as compared with the case of performing the whisker cutting only by the shearing action of the inner blade 7, Further, the beard cutting can be performed effectively.

  When the fixing portion 171 of the vibration generator 170 is fixed to the inner blade holder 9 that pivotally supports one end of the inner blade shaft 7a of the inner blade 7, the structure and the fixing structure of the vibration generator 170 can be simplified. Further, since the vibration generator 170 may be assembled to the inner blade holder 9 facing the inner blade 7, the position and shape of the vibration generator 170 can be freely selected, and the assembly can be performed easily.

  When the inner blade holder 9 is constituted by the holder frame 151 and the frame cover 152, and the fixing portion 171 and the intermediate arm 172 of the vibration generator 170 are arranged on the holder frame 151, the inner frame is assembled after the vibration generator 170 is assembled to the holder frame 151. Since the blade 7 and the holder frame 151 may be assembled, the vibration generator 170 can be assembled easily and accurately.

  When the sliding contact 163 is formed on the wall surface of the holder frame 151 and the sliding contact portion 173 of the vibrating body 170 is brought into pressure contact with the sliding contact surface 7A from the sliding contact 163 toward the side surface of the inner blade 7, the sliding contact 163 and the holder Since the vibrating body 170 can be arranged using the space in the frame 151, the vibrating structure can be arranged compactly. Further, the length of the sliding contact portion 173 is increased by the thickness of the vertical wall 153 of the holder frame 151, and the sliding contact portion 173 can be effectively vibrated.

  When the intermediate arm 172 of the vibrator 170 is formed in a curved shape, the total length from the fixed portion 171 to the sliding contact portion 173 via the intermediate arm 172 is increased using the space around the inner blade shaft 7a. can do. Further, the fixed portion 171 and the intermediate arm 172 having the vibration generating structure can be disposed without waste by using the internal space of the holder frame 151.

  According to the vibration generating structure in which the sliding contact portion 173 of the vibration generating body 170 is formed by the sliding contact arm 180 and the sliding contact claw 181 bent in a V shape, and the sliding contact claw 181 is pressed against the sliding contact surface 7A. The vibration of the sliding contact portion 173 and the intermediate arm 172 accompanying the sliding contact resistance between the contact claw 181 and the sliding contact surface 7A can be promoted, and vibration can be applied to the inner blade 7 in a stable state at all times.

  With the fixed portion 171 and the sliding contact portion 173 facing each other with the inner blade shaft 7a therebetween, on the diameter line of the inner blade 7 passing through the inner blade shaft 7a, the fixing portion 171 is located on the upper side in the rotational direction of the inner blade 7. If it arrange | positions, the distance of the fixing | fixed part 171 and the sliding contact part 173 can be enlarged, and the sliding contact part 173 can be vibrated effectively. Further, the vibrator 170 is elastically deformed in the driving direction of the inner blade 7, but the stress at that time is received by the fixed portion 171 at the position opposite to the sliding contact portion 173, so that the sliding contact portion 173 has a smaller sliding contact friction. Can be effectively vibrated. Incidentally, when the fixed portion 171 is in the vicinity of the sliding contact portion 173, it is necessary to increase the pressure of contact between the sliding contact portion 173 and the sliding contact surface 7A to vibrate, so that the sliding contact portion 173 or the sliding contact surface 7A is Easy to wear early.

  When the sliding contact portion 173 of the vibrator 170 is pressed against the peripheral edge of the end wall 7b of the inner blade 7, the sliding contact portion 173 can be pressed against the sliding contact surface 7A having a large peripheral speed. Can be vibrated.

  When the rotation stop piece 174 formed on the fixing portion 171 is joined to the horizontal frame portion 154 of the holder frame 151 and the exciter 170 is held and fixed so as not to rotate, the fixing portion 171 is fixed when the sliding contact portion 173 is elastically deformed. The moment acting on the second frame 154 is received by the horizontal frame portion 154, so that the fixing portion 171 can be securely fixed. Further, since the rotation stop piece 174 is received by the horizontal frame portion 154 of the holder frame 151, it is not necessary to provide the holder frame 151 with a structure for receiving the rotation stop piece 174, and the rotation stop structure can be simplified.

  When the rotation recess 176 formed on the periphery of the fixing portion 171 is engaged with the rotation protrusion 165 of the holder frame 151 and the vibration generator 170 is held and fixed in a non-rotatable manner, the temporarily assembled state of the holder frame 151 is raised. Since the vibrator 170 can be positioned, the vibrator 170 can be fixed to the holder frame 151 accurately. Further, when the sliding contact portion 173 and the intermediate arm 172 are elastically deformed or the deformation is released by their own elastic force, the rotation of the vibration generating body 170 due to the movement inertia force and the rotation-retaining concave portion 176 is prevented. By restricting by the protrusion 165, the vibration generator 170 can be vibrated in a stable state.

  The buffer sheet 182 is disposed between the vibrating body 170 and the sliding contact surface 7A of the cutting blade 7 when the sliding contact portion 173 and the intermediate arm 172 are elastically deformed or when the deformation is released by its own elastic force. This is because the impact pressure is reduced to reduce the sound pressure level of the tapping sound, and the quietness of the electric razor provided with the vibration generating structure is improved.

  In the electric razor in which one end of the inner blade shaft 7a of the inner blade 7 is pivotally supported by the inner blade holder 9, the buffer sheet 182 is formed in a circular shape and an insertion hole 183 is formed in the center thereof. By simply inserting the hole 183 into the inner blade shaft 7a, it is not necessary to pay attention to the assembling direction, the position after the assembly, and the like, and the buffer sheet 182 can be easily assembled to the inner blade 7.

  According to the vibration generating structure in which the intermediate arm 172 and the slidable contact portion 173 are provided integrally with the fixed portion 171 and the slidable contact portion 173 is pressed against the slidable contact surface 7A of the peripheral surface of the inner blade shaft 7a, the slidable contact portion 173 and the slidable contact portion 173 are slid. The sliding contact friction of the contact surface 7A can be reduced, and the vibrator 170 can be vibrated in a stable state.

  According to the electric razor in which the inner blade holder 9 is detachably attached to the head block 28 and the other end of the inner blade shaft 7a and the vibration generator 170 are attached to the inner blade holder 9, the inner blade 7 and the vibration member 170 are attached. Since it can be attached to and detached from the head block 28 together with the inner blade holder 9, the exciter 170 can be replaced at the same time when the inner blade 7 is replaced. In addition, since the vibration generator 170 is provided on the inner blade holder 9 that supports the other end of the inner blade shaft 7a, the sliding contact surface 7A of the inner blade 7 and the vibration generator 170 are brought into sliding contact with high accuracy and in a stable state. Thus, the vibrator 170 can be vibrated.

  When the final stage drive body 111 of the drive unit T2 is rotatably supported by the bearing body 57, the inner blade shaft 7a and the final stage drive body 111 are connected by a shaft joint composed of the joint shaft part 116 and the joint hole 118. Since the center of rotation of the final stage drive body 111 can be accurately defined by the bearing body 57, the torsional stress when the inner blade 7 is rotationally driven can be reduced. Further, by engaging the joint shaft portion 116 and the joint hole 118 at the inner center corresponding to the meshing peripheral surface of the final stage drive body 111, the strength of the final stage drive body 111 is reinforced by the inner blade shaft 7a. Thus, the structural strength of the power transmission structure of the final stage drive body 111 and the inner blade shaft 7a can be increased.

  When the bearing hole 117 and the joint hole 118 are formed inside the final stage drive body 111 and the tapered introduction guide hole 119 is formed on the opening end side of the bearing hole 117, the shaft end is placed in the introduction guide hole 119. By inserting and operating the inner cutter shaft 7a, the shaft end can be engaged and guided toward the bearing hole 117, so that the inner cutter 7 can be easily assembled to the final stage drive body 111.

  If the inner blade lock structure is provided between the inner blade holder 9 and the upper frame 35 of the head block 28, the inner blade 7 and the inner blade holder 9 are connected to the final stage driver 111 even when a drop impact is applied. The reliability of the electric razor can be improved by reliably preventing separation from the razor. When the inner blade 7 is rotationally driven, the inner blade holder 9 can be reliably prevented from moving in the axial dimension of the inner blade 7, and power transmission from the final stage driving body 111 to the inner blade 7 can be performed reliably.

  When the inner blade engaging structure is constituted by a pair of support frames 122 provided on the head block 28, a frame support 123 formed on the support frame 122, a connecting body 124 disposed below the inner blade 7, and the like, the support frame 122 is formed. The inner blade holder 9 can be integrated with the head block 28 by engaging the connecting body 124 inserted from one side with the frame support 123. In addition, since the inner blade holder 9 can be positioned and fixed by engaging the connecting body 124 and the frame support 123, the inner blade 7 that is cantilevered can be appropriately rotated and supported by the inner blade holder 9. Setting the dimension L from the inner blade holder 9 to the protruding end of the coupling body 124 smaller than the dimension L1 from the inner blade holder 9 to the protruding end of the joint shaft portion 116 of the inner blade shaft 7a facilitates replacement of the inner blade. Because. Specifically, when the inner blade shaft 7 a of the new inner blade 7 is connected to the final stage drive body 111, the inner blade shaft 7 a is connected to the frame support body 123 while the inner blade shaft 7 a is connected to the final stage drive body 111. Since the insertion guide hole 119 can be inserted into the bearing hole 117 and connected, the inner blade can be replaced easily and reliably.

  The dimension L from the inner blade holder 9 to the protruding end of the coupling body 124 is set to be smaller than the left and right length L2 of the cutting blade surface of the inner blade 7 because the inner blade 7 supported in a cantilever manner is loosely coupled. This is to prevent you from getting in contact. According to such an inner blade engaging structure, even if the joint shaft 116 side wobbles when the inner blade 7 is assembled, the cutting blade surface of the inner blade 7 contacts the connecting body 124 and the blade surface is damaged. Can be eliminated.

  According to the drive unit T2 configured by the drive pulley 110, the driven pulley 111, the belt 112 wound around these pulleys 110 and 111, and the restriction plate 113 that restricts the lateral swing of the belt 112, the power transmission By restricting the swinging of the linear transition portion of the belt 112 in the left-right direction by the restriction plate 113, the transmission efficiency of the winding transmission mechanism can be improved. Further, even when the cutting load at the time of cutting the beard is large, the driven pulley 111 and the inner blade 7 can be smoothly rotated to effectively cut the beard. Since the rotational power is transmitted to the driven pulley 111 using the belt 112 as a transmission element, the transmission noise can be reduced and the noise can be reduced as compared with the case where a gear is used as the transmission element.

  When the pulley receiving wall 140 is provided on the restriction plate 113 and at least one outer surface of the driving pulley 110 and the driven pulley 111 is received by the pulley receiving wall 140, the axial movement of the driving pulley 110 or the driven pulley 111 is restricted. Further, the transmission efficiency of the winding transmission mechanism can be further improved.

  When pulley receiving walls 140 are provided above and below the restriction plate 113 and a heat radiating hole 142 is opened at the center of the pulley receiving wall 140 for receiving the outer surfaces of the driving pulley 110 and the driven pulley 111, the pulley receiving wall 140 and each of the pulleys 110 and 111 are provided. It is possible to efficiently release the frictional heat generated between the heat dissipation holes 142 and prevent the pulleys 110 and 111 from being overheated.

  In the electric razor constituting the side frame 30 with the frame frame 30a and the frame cover 30b, if the heat radiating hole 146 is formed in the wall surface of the frame cover 30b facing the heat radiating hole 142, the frictional heat released from the heat radiating hole 142 is absorbed by the heat radiating hole. It can be discharged out of the frame cover 30b via 146. Therefore, heat can be prevented from being accumulated in the peripheral portion of the pulley receiving wall 140, and the pulleys 110 and 111 can be more reliably prevented from being overheated.

  When the outer blade frame 61 fixed to the front and rear edges of the outer blade 8 is supported by the outer blade holder 31 so that it can float up and down, and the outer blade springs 62 are arranged between both side ends of the outer blade frame 61 and the outer blade holder 31, The blade 8 can always be in close contact with the inner blade 7. Further, even when the outer blade 8 and the outer blade frame 61 sink into the right or left and tilt, the outer blade 8 can be brought into close contact with the inner blade 7 to accurately cut the beard.

  In the electric razor in which the outer blade spring 62 is disposed between the upper and lower opposed spring receivers 194 and 196 provided on the outer blade holder 31 and the outer blade frame 61, the outer blade holder 31 is provided on both sides of the outer blade frame 61. When the stopper 195 that is received by the spring receiver 196 is provided, the stopper 195 is received by the spring receiver 196 of the outer blade holder 31 when the outer blade 8 and the outer blade frame 61 sink and tilt to the right or left. Further, the outer blade 8 and the outer blade frame 61 can be prevented from sinking and separating from the outer blade holder 31. Further, since the stopper 195 is received using the spring receiver 196 of the outer blade holder 31, there is no need to provide a separate structure for restricting the sinking of the stopper 195, and the inner structure of the outer blade holder 31 is complicated. Can be eliminated.

  When a portal-shaped stopper arm 192 that can be elastically deformed is provided on both sides of the outer blade frame 61, and a stopper 195 is provided at the free end of the stopper arm 192, the stopper arm 192 is bent and deformed toward the inner surface side of the outer blade frame 61. The stopper 195 can be assembled on the upper surface side of the spring receiver 196 of the outer blade holder 31. Therefore, the outer blade 8 and the outer blade frame 61 can be more easily assembled to the outer blade holder 31.

  When the outer blade holder 31 is engaged with the inner space of the portal stopper arm 192 and the outer blade frame 61 is guided so as to be slidable up and down, the outer blade 8 and the outer blade frame 61 sway back and forth. The outer cutter 8 and the outer cutter frame 61 can be floated up and down while regulating the above. Therefore, the upper and lower float operations of the outer blade 8 and the outer blade frame 61 can be stabilized.

It is a vertical side view of the electric shaver provided with the vibration generating structure which concerns on this invention. It is a front view of the electric razor which concerns on this invention. It is a side view of the electric razor which concerns on this invention. It is a decomposition | disassembly side view which shows schematic structure of an electric shaver. It is a vertical front view of a razor head. It is a vertical side view of a razor head. It is a disassembled front view of a razor head. It is a disassembled perspective view of a head block. It is a disassembled front view which shows the drive structure of an inner blade. It is a disassembled front view which shows a front | former stage drive part. It is a side view which shows a next stage drive part. It is the sectional view on the AA line in FIG. It is a vertical side view which shows the joint structure of a driven pulley and an inner blade axis | shaft. It is a side view which shows the joint structure of a driven pulley. It is a disassembled perspective view which shows an inner blade and a vibrating structure. It is the BB sectional view taken on the line in FIG. It is CC sectional view taken on the line in FIG. It is a vertical side view which shows the float structure of an outer blade. It is the disassembled front view which fractured | ruptured a part of outer blade and outer blade holder. It is a vertical side view which shows another Example of a vibration generating structure. It is a vertical side view which shows another Example of a vibration generating structure. It is sectional drawing which shows another Example of an oscillation structure. It is a front view of only the principal part which shows another Example of a vibration generating structure. It is the DD sectional view taken on the line in FIG. It is a vertical side view which shows the Example which applied the vibration generating structure to the reciprocating type electric shaver. It is the EE sectional view taken on the line in FIG. It is a vertical side view which shows the Example which applied the vibration generating structure to the rotary electric shaver. It is a side view which shows another Example of a vibration body.

(Example) FIG. 1 thru | or FIG. 19 shows the Example of the electric shaver which concerns on this invention. In the present invention, “front / rear”, “left / right”, and “upper / lower” follow the crossing arrows shown in FIG. 2 and FIG. 2 and 3, the electric razor 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 so as to tilt forward and backward, and is configured to be washable with water. In the main body case 1, electrical components such as a motor 3, a secondary battery 4, and a control board 5 are arranged. The control board 5 is mounted with a switch 6 for switching the energization state of the motor 3 and an LED for displaying the remaining battery level. The razor head 2 is provided with a rotary inner blade (cutting blade) 7 that is driven to rotate about a horizontal axis (horizontal axis), and an inverted U-shaped outer blade 8 that circumscribes the inner blade 7. As shown in FIG. 7, the inner blade 7 includes an inner blade shaft 7a, five disks 7b fixed to the inner blade shaft 7a, and a mesh-shaped cutting blade 7c fixed to the peripheral surface of the disk 7b. It is configured. In order to facilitate replacement, the inner blade 7 is cantilevered by the inner blade holder 9 and is supported by both ends in a state where the inner blade shaft 7a is assembled to a driven pulley (final stage drive body) 111 described later. .

(Schematic structure of the main body case)
In FIG. 4, the main body case 1 includes a front case 13 and a rear case 14 that are divided in the front and rear directions, and a grip case 15 that covers the front surface of the front case 13, and grips along the dividing line of the front and rear cases 13 and 14. A case 15 covers the surface of the front case 13. The front case 13 includes a front upper case 16 and a front lower case 17 that are divided into upper and lower parts, and is fixed to the rear case 14 with screws 18. The grip case 15 is fixed to the rear case 14 with screws 19 screwed from the rear case 14 side with the upper and middle portions of the grip case 15 engaged with the front case 13. A boat-shaped switch panel 21 with a sharp upper and lower part is arranged at the lower part of the grip case 15, and a switch button 22 for switching the previous switch 6 is arranged near the upper end (see FIG. 2). On the rear surface side of the main body case 1, there are provided a shaving blade 23 and a slide knob 24 that pushes up the shaving blade 23 to a driving position.

(Schematic structure of razor head)
In FIG. 7, the razor head 2 includes a head block 28, side frames 29 and 30 fixed to the left and right of the block 28, inner blades 7 and outer blades 8, and an inner blade holder 9 that is attached to and detached from the head block 28. And an outer blade holder 31 that is attached to and detached from the side frames 29 and 30. As shown in FIG. 8, the head block 28 includes a square plate-shaped light source holder 33, a metal plate reinforcing plate 34 disposed on the upper surface of the light source holder 33, an upper frame 35 covering the upper surface of the reinforcing plate 34, and a light source The light source substrate 36 and the light guide 37 accommodated in the holder 33, three light emitting sources (LEDs) 38 mounted on the light source substrate 36, a light source packing 50, and the like. The three light emitting sources 38 irradiate visible light when using an electric razor to excite the visible light responsive photocatalyst coated on the inner blade 7 or the outer blade 8, and thereby the organic matter is produced by the strong redox action of the photocatalyst. And the generation of off-flavors associated with organic decay. The reinforcing plate 34 is provided with three light-transmitting windows 39 that allow the light emitted from the light source 38 to pass therethrough, corresponding to each light source 38. As the light source 38, an LED that emits ultraviolet light or infrared light in addition to visible light can be used, and a UVB-LED or UVC-LED that emits deep ultraviolet light having excellent bactericidal properties can be used.

  As shown in FIG. 8, the light guide 37 is formed of a transparent plastic material (polypropylene) in a flat plate shape, and spacer protrusions 43 that support the lower surface of the reinforcing plate 34 are formed in a rib shape along the peripheral edge of the upper surface. It is formed. In this way, by providing the spacer protrusion 43, a discharge path 44 for washing away hair chips and sebum is formed between the reinforcing plate 34 and the light guide 37, and the hair adhering to the upper surface of the light guide 37 is formed. Waste and sebum can be washed with water. The light guide 37 refracts visible light incident on the inside by internal reflection, and radiates light from the surface of the light guide 37 that is not covered with fuzz or sebum to the fuzz chamber.

  The light source holder 33 and the upper frame 35 are made of smoke-like translucent (transparent material) polypropylene. Therefore, a part of the light emitted from the light emission source 38 is applied to the fuzz chamber through the upper frame 35, so that the fuzz chamber R can be illuminated brightly together with the light that has passed through the translucent window 39. . Accordingly, the organic substance can be decomposed more effectively by activating the redox action by the photocatalyst. Further, the light radiated to the fuzz chamber leaks from the blade hole of the outer blade 8 and becomes a streak-like light. Furthermore, since the front surface of the light source holder 33 is exposed to a cleaning space U described later, a part of the light emitted from the light source 38 is emitted from a water guide surface 134 described later to illuminate the cleaning space U brightly. be able to. The light that illuminates the cleaning space U becomes soft and semi-bright light emitted from the translucent light source holder 33. As described above, since the razor head 2 in use emits streak-like light and dim light, a fantastic atmosphere can be created and the electric razor can be interesting.

  The reinforcing plate 34 is provided to enhance the structural strength of the head block 28 and to correct distortion and deformation of the light source holder 33 and the light guide 37. By firmly supporting the pair of left and right side frames 29, 30 with the head block 28 including the reinforcing plate 34, the structural strength of the side frames 29, 30 can be enhanced. Further, by enhancing the structural strength of the side frames 29 and 30, the inner blade 7 supported by the inner blade holder 9 and the right side frame 30 can be smoothly rotated. As shown in FIG. 7, the side ends of the upper frame 35 and the reinforcing plate 34 are fastened and fixed to the light source holder 33 with screws 49. Along with this, the light guide 37 is brought into close contact with the light source packing 50 disposed on the lower surface thereof, and the inside of the light source holder 33 is sealed. The light source substrate 36 is fastened and fixed to the lower surface side of the light guide 37 with screws 51 (see FIG. 6).

  As shown in FIG. 9, the left and right side frames 29 and 30 are frame frames 29 a and 30 a that are fastened and fixed to the left and right side surfaces of the light source holder 33 with screws 52, respectively, and frame covers 29 b and 30 b that cover the outer surfaces of the frames. It is configured in a hollow case shape. The frame covers 29b and 30b are fixed to the frame frames 29a and 30a with screws 53 (see FIG. 12). In a state where the side frames 29 and 30 are fixed to the light source holder 33, the lower sides of the frame frames 29 a and 30 a protrude downward from the light source holder 33. Thereby, the three of the head block 28 and the side frames 29 and 30 form a gate-shaped connecting recess 54 that sandwiches the upper part of the main body case 1 from the left and right (see FIG. 7).

  On the opposing surfaces of the left and right side frames 29 and 30, bearing portions 56 connected to a rotation shaft 55 described later are formed. 9, the upper half of the right side frame 30 protrudes upward from the light source holder 33, and a bearing body (boss) 57 for rotatably supporting the driven pulley 111 at the upper part of the protruding portion. Is attached. The bearing body 57 is made of polyacetal resin. A lock claw 58 and a lock spring 59 for locking and holding the outer blade holder 31 are assembled to the side frames 29 and 30. The lock claw 58 is urged by a lock spring 59 in a direction to engage with an engagement recess 60 (see FIG. 7) provided on the inner surface of the side wall of the outer blade holder 31. The outer blade frame 61 is fixed to the front and rear edges of the outer blade 8, and the outer blade frame 61 is pushed and urged by the outer blade spring 62 made of a compression spring so that the outer blade 8 can be floated in the vertical direction. The blade 7 is in close contact. Details thereof will be described later.

(Swing structure)
The razor head 2 is supported so as to be tiltable in the front-rear direction about a rotation shaft 55 provided on the main body case 1 side, and is tilted by a return spring 65 disposed between the main body case 1 and the razor head 2. The return bias is applied toward the position (the state shown in FIG. 6). The central axis of the rotary shaft 55 is horizontal when viewed from the front, and when the razor head 2 is in the tilt standby position, the rotary shaft 55 is seen from the direction (side) facing the shaft end. The head 2 is offset to the rear side with respect to the head central axis P1. The head central axis P1 of the razor head 2 is inclined forward with respect to the grip central axis P2 of the main body case 1 when viewed from the direction facing the shaft end of the rotation shaft 55.

  The return spring 65 is a torsion coil spring, and is fixed to the front upper case 16 with a screw 67 while being attached to the spring holder 66. In the state where the return spring 65 is assembled to the spring holder 66, the upper part of the spring arm 68 protrudes above the spring holder 66 and comes into contact with a spring receiving seat 69 protruding from the center of the lower surface of the light source holder 33, so that the razor head 6 is returned to the clockwise direction in FIG. As described above, when the rotation shaft 55 is arranged on the lower side of the razor head 2, the distance from the cutting blade surface of the razor head 2 to the center of the rotation shaft 55 can be increased. The tilting moment acting on can be increased. Therefore, the razor head 2 can be lightly tilted so that the cutting blade surface can follow the change of the skin surface with good response, and the beard cutting can be performed effectively.

  The razor head 2 can be tilted back and forth by connecting the bearing portions 56 provided on the side frames 29 and 30 to the rotation shaft 55, but the rotation shaft 55 and the bearing portion 56 are fitted to define the tilting range. Tilt regulation structure is provided on the surface. Specifically, as shown in FIG. 9, a rectangular rib-shaped restricting projection 72 is provided on the peripheral surface of the rotating shaft 55, and a restricting groove 73 that defines the tilting range of the side frames 29 and 30 is provided in the bearing portion 56. . When the razor head 2 is tilted forward, the side frames 29 and 30 are tilted together. However, when the groove end of the regulation groove 73 comes into contact with the regulation protrusion 72, the side frames 29 and 30 cannot tilt further. Incidentally, the tilt angle of the razor head 2 is 15 degrees. When the tilt restricting structure is provided as described above, it is possible to restrict the razor head 2 from tilting excessively. Further, since the tilt range of the razor head 2 is defined by the tilt restricting structure, the razor head 2 can always be properly returned to the tilt standby position without excessive force acting on the return spring 65.

(Inner blade drive structure)
As described above, in order to rotationally drive the inner blade 7 of the razor head 2 supported so as to be able to swing, the inner blade driving structure is arranged from the upper part of the main body case 1 to the inner blade shaft 7a. The inner blade drive structure includes a front-stage drive unit T1 provided inside the main body case 1 and a next-stage drive unit T2 that transmits the rotational power of the front-stage drive unit T1 to the inner blade shaft 7a.

(Structure of the front drive unit)
In FIG. 10, the front drive unit T <b> 1 includes a motor 3, a motor holder 76 that supports the motor 3, a pair of drive unit frames 77 that are fixed to the left and right of the motor holder 76, and the motor holder 76 and the drive unit frame 77. It consists of an assembled gear train. Connection seats 79 having positioning pins 78 are formed on the left and right sides of the motor holder 76, and the drive unit frame 77 is brought into contact with the connection seat 79 and fastened with two screws 80, thereby driving the drive unit. The frame 77 is integrated with the motor holder 76. Most of the fixed drive unit frame 77 protrudes upward from the motor holder 76. In order to enhance the overall structural strength of the drive unit frame 77 and further improve the structural strength of the rotating shaft 55, the drive unit frame 77 is made of a metal (stainless plate) frame base 81 and a plastic molded product. The frame frame 82 is integrally formed, and the frame base 81 is insert-fixed when the frame frame 82 is formed. A rotating shaft 55 is integrally formed on the upper portion of the outer surface of the frame 82.

  In order to seal the motor 3 in a watertight manner, as shown in FIG. 10, an output shaft packing (not shown) is mounted on the upper portion of the motor holder 76, and a bottomed cylindrical motor is mounted on the lower portion of the motor holder 76. A packing 88 is attached. Fastening seats 89 are provided on the left and right side surfaces of the motor holder 76, and the motor holder 76 is fastened and fixed to the rear case 14 together with the front upper case 16 with screws 18 inserted through the fastening seats 89.

  The gear train is configured as a reduction gear mechanism that decelerates motor power, and includes six gears 92 to 97, a horizontal first shaft 98, and a second shaft 99 as shown in FIG. Specifically, the first gear 92 is fixed to the output shaft of the motor 3, and the second gear 93 and the third gear 94 are integrally formed and supported by the motor holder 76 so as to be rotatable about the vertical axis. . The fourth gear 95 and the fifth gear 96 are fixed to the first shaft 98, and the sixth gear 97 is fixed to the second shaft 99. The third gear 94 and the fourth gear 95 are bevel gears, and the rotational power of the motor 3 is converted into rotational power around the horizontal first shaft 98 by both gears 94 and 95.

  Both ends of the first shaft 98 are rotatably supported by the left and right drive unit frames 77, and the second shaft 99 is rotated by a bearing body (bush) 102 provided on the right drive unit frame 77 toward FIG. The shaft end is supported freely and protrudes outward of the rotation shaft 55. This protruding shaft portion becomes the output shaft 103 of the gear train. An eccentric cam 104 is provided on the upper surface of the first gear 92, and the vibrator 105 is reciprocated by the cam 104 so that the movable blade of the shaving blade 23 can be reciprocated. The bearing body 102 is made of an oil-impregnated metal made of copper alloy or a bearing. As described above, if the gear train of the front drive unit T1 is configured by using the motor 3 and the motor holder 76 having high structural strength and the drive unit frame 77 as a support structure, the meshing accuracy of the gears constituting the gear train is enhanced. The rotational power of the motor 3 can be efficiently transmitted to the inner blade 7

(Structure of the next stage drive unit)
The next-stage drive unit (drive unit) T2 includes a winding transmission mechanism disposed on the outer surface of the right side frame 30 as viewed in FIG. Specifically, as shown in FIG. 11, a drive pulley 110 fixed to the output shaft 103, a driven pulley 111 connected to the inner blade shaft 7a, and a timing belt wound around these pulleys 110 and 111. A winding transmission mechanism is configured by the (belt) 112 and the restriction plate 113 that covers the outer surface of the timing belt 112, and the outer side thereof is covered by the frame cover 30b.

  As described above, according to the drive structure in which the structural strength of the light source holder 33 and the side frames 29 and 30 is increased by the metal reinforcing plate 34, the structural strength of the light source holder 33 and the side frames 29 and 30 is increased. As a result, the rotation of the drive pulley 110 and the driven pulley 111 can be smoothed and stabilized, so that the rotational power can be accurately transmitted in the next-stage drive unit T2, and the inner blade 7 can be driven with little transmission loss.

  As shown in FIG. 11, the regulation plate 113 is made of a press-molded product made of a stainless steel plate material. The regulation plate 113 presses the outer surfaces of the pulleys 110 and 111 with the plate surface, and simultaneously regulates the lateral movement of the timing belt 112. To do. For this purpose, pulley receiving walls 140 for receiving the outer surfaces of both pulleys 110 and 111 are provided at the upper and lower ends of the plate plate surface, and belt receiving walls 141 are provided before and after the plate plate surface. The belt receiving wall 141 receives the outer surface of the linear transition portion of the timing belt 112 and restricts the timing belt 112 from swinging in the left-right direction. In this way, if the pulley receiving wall 140 restricts the movement of the driving pulley 110 and the driven pulley 111 in the axial direction and further the belt receiving wall 141 restricts the swing of the timing belt 112 in the left-right direction, the transmission loss is reduced. The transmission efficiency of the winding transmission mechanism can be improved. Further, even when the cutting load at the time of cutting the beard is large, the driven pulley 111 and the inner blade 7 can be smoothly rotated to effectively cut the beard.

  In the center of the upper and lower pulley receiving walls 140, there are opened heat radiating holes 142 for releasing frictional heat generated between the pulley receiving walls 140 and the pulleys 110 and 111, respectively, in the middle of the upper and lower sides of the plate plate surface. Is formed with a clearance hole 143 for avoiding a screw boss for the screw 53 (see FIG. 12). The restriction plate 113 is assembled so that the upper and lower heat radiating holes 142 are fitted into the shaft portion 144 and the output shaft 103 via a gap, and is fastened and fixed by screws 145 screwed into the frame frame 30a. The upper and lower central portions of the plate plate surface fastened with screws 145 are recessed in a stepped manner with respect to the upper and lower pulley receiving walls 140. A heat radiating hole 146 is formed in the side wall of the frame cover 30 b that faces the upper heat radiating hole 142. By providing the heat radiating hole 146, it is possible to eliminate heat from being accumulated in the peripheral portion of the pulley receiving wall 140 and reliably prevent the pulleys 110 and 111 from being overheated.

(Fitting structure)
In order to transmit the rotational power of the driven pulley 111 to the inner blade shaft 7a and further facilitate the exchange of the inner blade 7, both 111 and 7a are connected by a shaft coupling that engages with each other. As shown in FIG. 12 to FIG. 14, the shaft joint is a cross formed with a joint shaft portion 116 having a parallel flat surface provided at the shaft end of the inner blade shaft 7 a and a bearing hole 117 in the driven pulley 111. It is comprised by the joint hole part 118 of a shape. In this embodiment, as shown in FIGS. 13 and 14, triangular projections 120 are provided at four locations on the inner surface of the bearing hole 117, and joint hole portions 118 are formed between the opposing surfaces of the projections 120. did. On the opening end side of the bearing hole 117, an introduction guide hole 119 for engaging and guiding the shaft end of the inner blade shaft 7a toward the bearing hole 117 is formed in a tapered shape. In addition, an introduction guide surface 121 that engages and guides the joint shaft portion 116 toward the joint hole portion 118 is formed on the projection 120. According to the joint structure described above, the inner blade 7 and the driven pulley 111 can be simply connected by simply inserting the joint shaft portion 116 into the bearing hole 117 inside the driven pulley 111 and engaging with the joint hole 118. When the joint shaft portion 116 is inserted into the bearing hole 117, the shaft end of the joint shaft portion 116 can be guided to the bearing hole 117 through the introduction guide hole 119, and the shaft end of the joint shaft portion 116 is further guided by the introduction guide surface 121. Since it can be guided and engaged with the joint hole 118, the inner blade shaft 7a and the driven pulley 111 can be easily connected. Further, by providing the introduction guide surface 121, it is possible to well prevent the corner on the opening end side of the protrusion 120 from being damaged.

  When removing the inner blade 7 from the driven pulley 111, the inner blade shaft 7a is pulled out from the bearing hole 117 by simply pulling the inner blade holder 9 in a direction to separate it from the driven pulley 111, and the inner blade 7 is removed from the driven pulley. Since it can be easily separated from 111, the inner blade 7 can be easily replaced. Further, since the joint shaft 116 and the joint hole 118 are engaged at the inner center corresponding to the meshing peripheral surface of the driven pulley 111, the strength of the driven pulley 111 is reinforced by the inner blade shaft 7a, and the driven pulley 111 is strengthened. And the structural strength of the power transmission structure of the inner blade shaft 7a can be enhanced. When the positional relationship between the bearing body 57 that pivotally supports the driven pulley 111 and the joint structure is arranged, the introduction guide hole 119 and the bearing hole 117 are sequentially formed from the side end of the pulley boss 114 of the driven pulley 111 supported by the bearing body 57. The joint shaft portion 116 and the joint hole portion 118 are engaged with each other inside the bearing hole 117. That is, the joint shaft portion 116 and the joint hole portion 118 are engaged inward from the bearing peripheral surface of the bearing body 57.

(Inner blade engagement structure)
As shown in FIG. 7, the inner blade 7 before being mounted is cantilevered by the inner blade holder 9 as described above. In order to properly position the inner blade 7 in this state with respect to the driven pulley 111 and the head block 28, an inner blade engaging structure is provided between the inner blade holder 9 and the upper frame 35 of the head block 28. As shown in FIG. 8, the inner blade engaging structure includes a pair of front and rear support frames 122 provided on the upper surface of the upper frame 35, and three horizontally long rib-shaped frame supports 123 formed on the opposing surface of the support frame 122. The connecting member 124 (see FIG. 15) is disposed below the inner blade 7 and projects from the inner blade holder 9 in parallel with the inner blade shaft 7a. Of the three frame supports 123, the left and right frame supports 123 are formed along the upper edge of the support frame 122, and the central frame support 123 is formed along the lower edge of the support frame 122. The connecting body 124 slides and engages with the frame support 123 in the upper and lower gap portions 125 of the frame support 123 (see FIG. 6).

  As shown in FIG. 9, the connecting body 124 is a press-molded product made of a stainless steel plate having a gate shape as viewed from above, and its base end portion is inserted when the inner blade holder 9 is formed, and integrated with the inner blade holder 9. It has become. In order to facilitate the replacement of the inner blade, as shown in FIG. 7, the dimension L from the inner blade holder 9 to the protruding end of the coupling body 124 is set from the inner blade holder 9 to the protruding end of the joint shaft portion 116 of the inner blade shaft 7a. Is set smaller than the dimension L1. Furthermore, the dimension from the inner blade holder 9 to the protruding end of the coupling body 124 is set to be smaller than the left and right length L2 of the cutting blade surface of the inner blade 7.

  As described above, when the relationship between each dimension and length is set to L <L2 <L1, the connecting body 124 is inserted into the gap portion between the frame supports 123 of the upper frame 35 and is slid from the side. The joint shaft portion 116 can be engaged with the bearing hole 117 and further can be engaged with the joint hole portion 118. Further, in the process of slidingly engaging the coupling body 124 with the frame support 123, even if the free end side of the inner blade 7 may wobble, the cutting blade surface of the inner blade 7 contacts the coupling body 124 and the blade It can eliminate the damage to the surface. In a state where the inner blade shaft 7a is completely connected to the driven pulley 111, the inner blade shaft 7a is pivotally supported by the pulley boss 114 of the driven pulley 111 and the inner blade holder 9 in a doubly supported manner.

  As described above, in order to prevent the inner blade holder 9 attached to the upper frame 35 from separating and moving away from the driven pulley 111, an inner blade lock structure is provided between the inner blade holder 9 and the upper frame 35. Provided. In FIG. 5, the inner blade lock structure has an inner blade lock claw 128 assembled inside the inner blade holder 9, a biasing spring 129 that urges the inner blade lock claw 128 to advance downward, and a recess formed in the upper frame 35. The engaging recess 130 is configured. In a state in which the inner blade holder 9 is assembled to the upper frame 35, the inner blade lock claw 128 engages with the engaging recess 130, and holds the inner blade 7 and the inner blade holder 9 in a position where they cannot be separated and moved. When removing the inner blade 7, the inner blade holder 9 is pulled out, and the inner blade lock claw 128 engaged with the engaging recess 130 is retracted upward against the biasing spring 129 to lock the inner blade 7. Release the state. Further, the inner blade 7 can be removed from the upper frame 35 by extracting the connecting body 124 from the frame support 123. By providing the inner blade lock structure in this way, it is possible to reliably prevent the inner blade 7 and the inner blade holder 9 from being separated from the driven pulley 111 even when a drop impact is applied.

  As shown in FIG. 6, a gap corresponding to the tilt angle is secured between the main body case 1 and the razor head 2 in order to tilt the razor head 2 forward from the tilt standby position. Specifically, a tapered gap toward the return spring 65 is formed between the lower surface of the light source holder 33 and the upper surface of the front case 13. Since the dust and dust easily enter the gap, the gap is used as the cleaning space U in order to wash away the dust and dust that have entered the gap. Further, an oblique water guide surface 134 is formed facing the front portion of the cleaning space U, and water guide surfaces 135 for guiding the cleaning water toward the center of the cleaning space U are formed obliquely on both side ends thereof. By providing the cleaning space U, the chips and dust that have entered the space U can be easily washed away with the washing water, and at the same time, the washing water is caused to flow around the return spring 65 and the return spring 65 is also washed. Can be done.

  As shown in FIGS. 1 and 15, the inner blade holder 9 includes a holder frame 151 that supports the inner blade shaft 7 a and a frame cover 152 that covers the outer surface of the holder frame 151. The holder frame 151 is integrally provided with an arch-shaped vertical wall (mounting wall) 153, a horizontal frame portion 154 projecting laterally along the periphery of the vertical wall 153, and a bottom wall 155. A bearing body (bush) 156 that supports the inner blade shaft 7a is fixed at the center. On the vertical wall 153, a spring receiving frame 157 for receiving the biasing spring 129 protrudes in the horizontal direction, and on the upper side thereof, a stopper rib 159 for receiving the washer 158 fixed to the shaft end of the inner blade shaft 7a protrudes. (See FIG. 16). Further, a sliding contact 163 is opened in the vertical wall on the rear side of the bearing body 156, and a welding pin 164 and a locking pin 165 are provided in the vertical wall on the front side of the bearing body 156. Engagement claws 166 are formed at three inner surfaces of the joining edge of the frame cover 152. By engaging these claws 166 with engagement holes 167 provided in the horizontal frame part 154, the frame cover 152 is held in the holder. It can be integrated with the frame 151. The washer 158 and the stopper rib 159 are provided to restrict the inner blade 7 from moving in the axial direction toward the driven pulley 111.

  According to the inner blade engaging structure configured as described above, the inner blade 7 and a vibration body 170 to be described later can be attached to and detached from the head block 28 together with the inner blade holder 9. The vibrator 170 can also be replaced at the same time. In addition, since the vibration generator 170 is provided on the inner blade holder 9 that supports the other end of the inner blade shaft 7a, the sliding contact surface 7A of the inner blade 7 and the vibration generator 170 are brought into sliding contact with high accuracy and in a stable state. Thus, the vibrator 170 can be vibrated.

(Vibration structure)
In order to effectively perform whisker cutting by applying vibration to the inner blade 7, a vibration generating structure is provided between the disc 7 b at the side end constituting the inner blade 7 and the inner blade holder 9. Specifically, the vibration generator 170 is provided on the vertical wall 153 of the holder frame 151 facing the frame cover 152, and when the inner blade 7 is rotationally driven, the vibration generator 170 is vibrated to impart vibration to the inner blade 7. doing. In FIG. 1, the vibrating body 170 includes a fixed portion 171 fixed to the vertical wall 153, an intermediate arm 172 extending from the fixed portion 171, a sliding contact portion 173 provided at an end of the intermediate arm 172, and a fixed portion 171. It consists of a metal leaf spring body integrally provided with a turning stop piece 174 that is folded and formed at the front corner. A pin hole 175 for the welding pin 164 is formed on the plate surface of the fixing portion 171, and a rotation recessed portion 176 for the rotation stop pin (rotation protrusion) 165 is formed on the peripheral edge adjacent to the rotation stop piece 174. is there.

  The intermediate arm 172 is formed in a curved shape along a concentric circle with the rotation center axis of the inner blade 7 as the center. As described above, when the intermediate arm 172 is formed in a curved shape, the total length of the fixed portion 171, the intermediate arm 172, and the sliding contact portion 173 can be increased, and the vibrator 170 can be easily vibrated. Further, the total weight of the portion that vibrates by the larger total length from the fixed portion 171 to the sliding contact portion 173 via the intermediate arm 172 can be increased, and stronger vibration can be applied to the cutting blade 7.

  As shown in FIG. 17, the slidable contact portion 173 includes a slidable contact arm 180 bent toward a disc (end wall) 7b provided on the side end of the inner blade 7 continuously to the intermediate arm 172, and a slidable contact portion 180. A sliding contact claw 181 formed by bending the front end of the contact arm 180 into a V shape is provided. While the sliding contact portion 173 is inserted into the sliding contact port 163, the pin hole 175 and the locking recess 176 are engaged with the welding pin 164 and the locking pin 165, and the locking piece 174 is applied to the inner surface of the horizontal frame portion 154. The vibrator 170 can be fixed to the vertical wall 153 by melting and deforming the tip of the welding pin 164.

  The intermediate arm 172 in a state in which the sliding contact claw 181 is in pressure contact with the sliding contact surface 7A of the disk (end wall) 7b on the side end via the cushioning sheet 182 is elastically deformed while being slightly separated from the vertical wall 153. doing. Further, the sliding contact claw 181 is pressed against the periphery of the sliding contact surface 7A close to the periphery, so that the frequency of the sliding contact claw 181 increases while the inner blade 7 rotates once. In each figure, an arrow a indicates the rotation direction of the inner blade 7.

  As described above, when the state in which the vibration generator 170 is mounted on the vertical wall 153 is viewed from the side, the sliding contact portion 173 is disposed on the upper side in the rotational direction of the inner blade 7 from the fixed portion 171 as shown in FIG. The sliding contact claw 181 is in pressure contact with the buffer sheet 182. Further, the center of the welding pin 164 and the center of pressure contact of the sliding claw 181 are such that the fixed portion 171 and the sliding contact portion 173 face each other with the inner blade shaft 7a therebetween, and the inner blade 7 passing through the inner blade shaft 7a. Are located at the 3 o'clock and 9 o'clock positions of the dial of the watch.

  The buffer sheet (buffer body) 182 is formed by punching a polyamide resin sheet into a circular shape, and the central insertion hole 183 is fitted around the inner blade shaft 7a so as to be integrated with the inner blade 7. When the inner blade 7 is rotationally driven, the buffer sheet 182 basically does not rotate and remains stationary, but it may rotate slowly in the direction of rotation of the inner blade 7.

  The vibration generating structure configured as described above has an elastic deformation operation in which the sliding contact portion 173 is dragged in the driving direction by the sliding contact resistance of the inner blade 7, and the elastically deformed vibrating body 170 is the sliding contact portion 173 and the inner blade 7. Vibration is generated by a deformation release operation that is restored by its own elastic force against the frictional resistance of the body. The inner blade 7 during shaving is rotationally driven at about 2000 rpm, but the elastic deformation operation and the deformation release operation of the vibration exciter 170 are performed about 10 times during one rotation of the inner blade 7. Therefore, a slight vibration (vibration) of 300 to 330 Hz acts on the inner blade 7, and the inner blade 7 cuts the whiskers while receiving the previous minute vibration. Therefore, compared with the case where the whisker is cut only by the shearing operation of the inner blade 7, the cutting resistance can be reduced and the whisker can be cut effectively.

(Outer blade structure)
18 and 19 show the float structure of the outer cutter 8. As described above, the sheet-like outer blade 8 is supported by the outer blade holder 31 so as to be vertically floatable via the outer blade frame 61 fixed to both ends thereof. As shown in FIG. 18, the outer cutter frame 61 is formed of a frame body whose front and rear surfaces are inclined in a tapered shape, and blade receiving recesses 185 for assembling the outer cutter 8 are formed on the front and rear surfaces thereof. A spring receiver 186 is provided. Four welding pins 187 are provided in the blade receiving recess 185, and the outer blade 8 is moved by engaging the outer blade 8 and the holding frame 188 with the pin 187 and melting and deforming the protruding end of the welding pin 187. It is integrated with the outer blade frame 61. Three slide grooves 189 are formed below the blade receiving recess 185, and the grooves 189 are guided by a guide rib 190 provided on the inner surface of the outer blade holder 31 so as to be vertically slidable.

  As shown in FIG. 19, the spring receiving portion 186 is provided with a gate-shaped stopper arm 192 that can be elastically deformed in the left-right direction, and is engaged with the lower end of the outer blade spring 62 at the front-rear center of the base end of the stopper arm 192. A mating spring receiving pin (spring receiving body) 194 protrudes upward. Moreover, the free end (upper end) of the stopper arm 192 is bulged outwardly, and a stopper 195 is provided. The stopper 195 is provided to restrict excessive sinking of the outer blade frame 61 and further to prevent the outer blade frame 61 from being separated from the outer blade holder 31. On the inner surface of the outer blade holder 31, a spring receiving pin (spring receiving body) 196 that engages with the upper end of the outer blade spring 62 protrudes downward. The outer blade spring 62 is a compression coil spring. Thus, the compression coil type outer blade springs 62 are disposed on the vertically opposite spring receivers 194 and 196 provided on both inner surface sides of the outer blade holder 31 and both sides of the outer blade frame 61.

  Since the inner cutter 7 of this embodiment does not float up and down, the meaning of supporting the outer cutter 8 so that it can float up and down is exclusively for bringing the outer cutter 8 into close contact with the inner cutter 7. However, when the inner blade 7 can float up and down, the outer blade 8 can be floated up and down following the inner blade 7 so that the outer blade 8 can be brought into close contact with the inner blade 7. The meaning of providing the stopper 195 in the electric razor in which the inner blade 7 does not float up and down is to restrict the outer blade frame 61 from being separated from the outer blade holder 31 when the outer blade holder 31 is separated from the head block 28. . However, when the inner blade 7 can float up and down, the stopper 195 can also exhibit the effect of restricting excessive sinking of the outer blade frame 61.

  According to the outer cutter structure configured as described above, the outer cutter 8 can always be in close contact with the inner cutter 7. Further, even when the outer blade 8 and the outer blade frame 61 sink into the right or left and tilt, the outer blade 8 can be brought into close contact with the inner blade 7 to accurately cut the beard. In the state where the outer blade spring 62 is assembled to the spring receiving pin 194 of the outer blade frame 61, the outer blade frame 61 is assembled to the outer blade holder 31 from the lower opening side, and one stopper arm 192 is attached to the spring receiving pin 196. The outer cutter 8 and the outer cutter frame 61 are attached to the outer cutter holder 31 by engaging the upper end of the spring receiving pin 196 while elastically deforming the other stopper arm 192 toward the inner surface of the outer cutter frame 61. (See FIG. 7). As described above, when the portal-shaped stopper arm 192 that can be elastically deformed is provided on the outer cutter frame, the outer cutter 8 and the outer cutter frame 61 can be more easily assembled to the outer cutter holder 31.

  Since the outer blade frame 61 in the assembled state is pressed and biased by the outer blade spring 62, the left and right stoppers 195 are received by the upper ends of the spring receiving pins 196 of the outer blade holder 31, as shown in FIG. . Further, when the outer blade holder 31 is mounted on the head block 28, the inner surface of the outer blade 8 is received by the peripheral surface of the inner blade 7, so that the left and right stoppers 195 are provided on the outer blade holder 31 as shown in FIG. The inner blade 7 receives the urging force of the outer blade spring 62 from the upper end of the spring receiving pin 196.

  When the inner blade 7 is driven to rotate, the sliding claw 181 of the vibration generator 170 is elastically deformed and deformed while sliding on the buffer sheet 182 and the sliding contact surface 7A of the side end disk 7b. repeat. That is, the vibration generator 170 undergoes a sliding contact resistance from the sliding contact surface 7A of the inner blade 7 that is rotationally driven and vibrates by itself. Therefore, the sliding contact claw 181 only slides with respect to the sliding contact surface 7A as compared with the conventional vibration generating structure in which the rotating minute protrusion moves over the guide pin and mechanically and forcibly moves the inner blade to the left and right. Therefore, the inner blade 7 can be smoothly vibrated while reducing the frictional resistance when the vibration is generated. There is little need to consider aging. Since the whiskers can be sheared while the cutting blades 7 are forcibly vibrated by the vibration applied from the vibrator 170, the cutting blades 7 can be sheared compared to the case where the whiskers are sheared only by the shearing action of the cutting blades 7. The beard cutting can be effectively performed by combining the movement of the cutting blade portion in a complex manner.

  When the buffer sheet 182 is not disposed between the sliding contact claw 181 and the disc 7b at the side end, the fine vibration of the sliding contact claw 181 is directly transmitted to the inner blade 7 so that the stronger vibration is transmitted to the inner blade. 7 can be told. However, a stronger minute vibration can be transmitted to the inner blade 7, but when the sliding contact claw 181 switches from the elastic deformation operation to the deformation release operation, the sliding contact claw 181 bounces and strikes the disk 7b, generating a hitting sound. Cheap. In order to mitigate the occurrence of such a beating sound, a buffer sheet 182 is interposed between the sliding contact claw 181 and the disc 7b. As described above, if the whisker is cut while applying vibration to the inner blade 7 with the vibration generator 170, the inner blade 7 performs the whisker cutting while exhibiting a pulling action, so that only the shearing action of the inner blade 7 is achieved. Compared with the case of cutting the whiskers with, the sharpness at the time of cutting the whiskers can be improved and the whiskers can be cut more effectively.

20 to 28 show another embodiment of the vibration generating structure. In addition, in each different Example, the same code | symbol is attached | subjected to the same member as said Example, and the description is abbreviate | omitted.
In the vibration generating structure shown in FIG. 20, the vibration generator 170 is constituted by a fixed portion 171, an intermediate arm 172 formed by folding from the fixed portion 171, and a V-shaped sliding contact portion 173 provided at the tip of the intermediate arm 172. did. In this case, the sliding contact portion 173 is in pressure contact with the sliding contact surface 7A of the peripheral surface of the inner blade shaft 7a, and the elastic contact operation in which the sliding contact portion 173 is dragged in the driving direction by the sliding contact resistance of the inner blade shaft 7a. Then, the elastically deformed vibrator 170 generates vibration by a deformation releasing operation that is restored by its own elastic force. Thus, when the sliding contact portion 173 is brought into pressure contact with the sliding contact surface 7A of the peripheral surface of the inner blade shaft 7a, the diameter of the inner blade shaft 7a is small and the peripheral speed is small. Is a vibration smaller than the amplitude of the fine vibration described in the previous embodiment. Further, fine vibration in the vertical direction (the direction in which the outer blade 8 contacts the skin surface) acts on the inner blade 7. For this reason, the skin surface can be vibrated with the outer blade 8 that is vibrated by the inner blade 7, and the whiskers can be cut in a state where the whiskers are pushed out of the skin surface. When the driving direction of the inner blade 7 is opposite to the arrow A direction, vibration does not occur, but the inner blade shaft 7a can be prevented from shaking.

  In the vibration generating structure shown in FIG. 21, the vibration generator 170 is configured by a fixed portion 171, an intermediate arm 172 formed by folding from the lower edge side of the fixed portion 171, and a sliding contact portion 173 provided at the tip of the intermediate arm 172. . Further, an elastic piece 177 was bent and formed from the upper edge side of the fixed portion 171, and a pressing claw 178 provided at the tip thereof was pressed against the upper peripheral surface of the inner blade shaft 7a. The intermediate arm 172 is curved along the lower peripheral surface of the inner blade shaft 7 a, and the sliding contact portion 173 is in pressure contact with the sliding contact surface 7 A at the side end of the inner blade 7. The rotation direction of the inner blade 7 is the counterclockwise rotation direction in FIG.

  In the vibration generating structure of FIG. 21, the vibration of the vibration generator 170 can be generated, and the elastic blade 177 can press the inner blade shaft 7 a to suppress the vibration of the inner blade 7. It can be rotated in the state. Further, at the time of cutting the whiskers, the whisker can be cut while the inner blade 7 is vibrated in the axial direction of the inner blade shaft 7a by the vibration of the vibrator 170. Since the inner blade 7 at this time performs beard cutting while exhibiting a cutting action, the sharpness at the time of cutting the beard is further improved compared to the case where the beard cutting is performed only by the shearing action of the inner blade 7. The beard cutting can be performed effectively.

In the vibration generating structure shown in FIG. 22 (a), the buffer sheet 182 is bonded and fixed to the outer surface of the disc 7b so that the buffer sheet 182 can be rotated along with the inner blade 7. The buffer sheet 182 in the previous embodiment is different from the buffer sheet 182 of FIG. 22A in that it is not bonded and fixed to the disk 7b.
In the vibration generating structure shown in FIG. 22 (b), the buffer sheet 182 is bonded and fixed from the sliding contact arm 180 constituting the sliding contact portion 173 to the sliding contact claw 181 so that the sliding contact claw 181 and the buffer sheet 182 are fixed to the disc 7b. The sliding contact surface 7A was slidably contacted.
In the vibration generating structure shown in FIG. 22 (c), the buffer sheet 182 is omitted, and the sliding contact claw 181 is directly pressed against the sliding contact surface 7A of the disk 7b. If the buffer sheet 182 is omitted in this manner, a hitting sound may be generated, but the sound pressure level of the generated hitting sound is low due to differences in the overall structure of the vibration generating structure and the formation material of each component. In that case, there is no problem even if the buffer sheet 182 is omitted.

  23 and 24 show still another embodiment of the vibration generating structure. In this case, the cutting edge 7c having a constant width is omitted at one side end of the inner cutter 7, and the sliding contact surface 7A that is smoothly continuous with the peripheral surface of the inner cutter 7 is formed. Further, the vibrator 170 is mounted on the outer surface of the vertical wall 153 of the holder frame 151 so that the sliding contact portion 173 is pressed against the previous sliding contact surface 7A. The intermediate arm 172 in this embodiment is formed by folding from the lower edge of the fixed portion 171, and a sliding contact portion 173 is formed at the tip thereof. The intermediate arm 172 is formed in a partial arc shape along the sliding contact surface 7A.

  As described above, when the sliding contact claw 181 of the vibration generator 170 is pressed against the sliding contact surface 7A provided on the peripheral surface of the inner blade 7, the vibration generator 170 has a larger peripheral speed than the sliding contact surface 7A. The frequency of the fine vibration can be further increased, and vibration in the vertical direction (direction in which the outer blade 8 contacts the skin surface) can be applied to the inner blade 7. Therefore, similarly to the vibration generating structure described with reference to FIG. 20, the skin surface can be vibrated with the vibrating outer blade 8, and the whiskers can be cut in a state where the whiskers are pushed out from the skin surface, thereby improving the shaving effect. . Moreover, since the vibrator 170 should just be assembled | attached to the outer surface of the vertical wall 153, the structure can be simplified and a fine vibration can be generated in the stable state.

  25 and 26 show another embodiment in which the vibration generating structure is applied to an electric razor having a reciprocating inner blade 7. In this case, the inner blade 7 is held in an inverted U shape by the inner blade frame 198, and a sliding contact surface 7 A is provided on the rear surface of the inner blade frame 198. Similarly, the outer blade 8 is held in an inverted U shape by the outer blade holder 31, and a vibrating body 170 is disposed on the inner surface of the outer blade holder 31 facing the sliding contact surface 7A. The vibration exciter 170 is integrally provided with a fixed portion 171, an intermediate arm 172, and a sliding contact portion 173, but each portion is formed by bending a leaf spring material in the thickness direction. The sliding contact claw 181 was formed continuously with the intermediate arm 172. According to such a vibrator 170, the overall structure of the vibrator 170 can be further simplified as compared with the vibrator 170 described with reference to FIG. Incidentally, the inner blade 7 is reciprocated in the direction of the arrow shown in FIG. The vibrator 170 vibrates a plurality of times while the inner blade 7 moves in one direction, and promotes cutting of the beard by the inner blade 7. In FIG. 25, reference numeral 199 is a drive shaft for reciprocatingly driving the inner blade 7.

  FIG. 27 shows an embodiment in which the vibration generating structure is applied to a rotary electric shaver in which the inner blade 7 is driven to rotate about a vertical axis (vertical axis). In this case, a partially spherical outer cutter 8 is supported by a cylindrical outer cutter holder 31 screwed into the upper peripheral surface of the main body case 1. Further, the inner blade 7 is configured by supporting a plurality of cutting blades 202 by an inner blade holder 201 fixed to the output shaft 3a of the motor. The inner blade holder 201 is provided with a cylindrical tube wall 203, and a vibrating body 170 is in pressure contact with the sliding contact surface 7A on the inner surface thereof. The vibrator 170 includes a fixing portion 171 fixed to the upper end surface of the main body case 1 with a welding pin 164, an intermediate arm 172 that is folded from the fixing portion 171 and extends along the sliding contact surface 7A, and a sliding contact surface. A sliding contact portion 173 that press-contacts 7A is integrally provided. The inner blade 7 is rotationally driven in the direction of arrow a, and the sliding contact portion 173 is disposed on the upper side of the rotation direction of the inner blade 7 from the fixed portion 171. The vibration exciter 170 in this embodiment vibrates a plurality of times while the inner blade 7 makes one rotation, and promotes the beard cutting by the inner blade 7. According to the electric razor having the above-described configuration, since the vibration generator 170 is disposed in the projection plane of the inner blade holder 201, the razor head 2 can be made compact.

  In the above-described embodiment, the intermediate arm 172 is attached to the inner blade 7 in order to avoid the vibrator 170 from abutting and interfering with the inner blade shaft 7a, and to further increase the total length from the fixed portion 171 to the sliding contact portion 173. Although it was formed in a curved shape along a concentric circle concentric with the inner blade shaft 7a, it is not necessary. For example, as shown in FIG. 28, the intermediate arm 172 can be formed in a mountain-valley shape to increase the total length of the intermediate arm 172. In short, when assuming a virtual center line connecting the fixed portion 171 and the sliding contact portion 173 at the shortest distance, the middle part of the intermediate arm 172 may be formed in a non-linear shape via a position away from the virtual center line. That's fine.

  In the above embodiment, the motor power is decelerated and output to the drive pulley 110 by the front drive unit T1, but depending on the output specifications of the motor 3, the drive pulley 110 is fixed to the output shaft, and the rotational power is supplied to the next stage. You may transmit directly to the drive part T2. The present invention is not limited to a rotary electric shaver, but can be applied to a reciprocating electric shaver and an electric shaver not provided with an outer blade. The next stage drive unit T2 can be configured with a gear as a transmission element. In this case, the final stage drive body 111 may be constituted by a gear, and a gear train may be provided between the output shaft 103 and the final stage drive body 111.

1 Body case 2 Razor head 7 Cutting blade (inner blade)
7a Inner blade shaft 7b End wall (disc)
9 Inner blade holder 28 Head block 151 Holder frame 153 Mounting wall (vertical wall)
163 Sliding contact hole 170 Exciter 171 Fixing part 172 Intermediate arm 173 Sliding contact part

Claims (15)

A cutting blade (7) that has a main body case (1) that also serves as a grip and a razor head (2), is driven by motor power to the razor head (2), and a vibrator that applies vibration to the cutting blade (7). (170) provided with an electric razor,
A part of the vibrating body (170) is in sliding contact with the sliding contact surface (7A) of the cutting blade (7), and elastic deformation accompanying sliding contact resistance between the vibrating body (170) and the sliding contact surface (7A) is obtained. It is provided so that it can vibrate by the deformation release operation by its own elastic force,
The cutting blade (7) is configured to transmit the vibration of the vibrator (170) to cut the whiskers ,
The vibration exciter (170) is provided at a fixed portion (171) provided at one end thereof, an intermediate arm (172) extending from the fixed portion (171), and an end portion of the intermediate arm (172). 7A) including a sliding contact portion (173) that is in pressure contact with
When a virtual center line connecting the fixed part (171) and the sliding contact part (173) at the shortest distance is assumed, the middle part of the intermediate arm (172) is formed in a non-linear shape via a position away from the virtual center line. An electric razor characterized by that . The vibration exciter (170) is provided at a fixed portion (171) provided at one end thereof, an intermediate arm (172) extending from the fixed portion (171), and an end portion of the intermediate arm (172). 7A) is formed in a band shape including a sliding contact portion (173) that press-contacts to 7A),
The electric shaver according to claim 1, wherein the fixing portion (171) is fixed to the mounting wall (153) facing the cutting blade (7). A rotary inner blade (7) and an outer blade (8) are arranged on the razor head (2),
The electric shaver according to claim 2, wherein the sliding contact portion (173) of the vibrator (170) is in pressure contact with a sliding contact surface (7A) provided on a side end surface of the inner blade (7) . One end of the inner blade shaft (7a) of the inner blade (7) is pivotally supported by the inner blade holder (9),
The electric shaver according to claim 3, wherein the fixing portion (171) of the vibrator (170) is fixed to the inner blade holder (9) . The inner blade holder (9) includes a holder frame (151) that supports the inner blade shaft (7a), and a frame cover (152) that covers the outer surface of the holder frame (151).
The electric razor according to claim 4, wherein a fixing portion (171) and an intermediate arm (172) of the vibrator (170) are arranged along a surface of the holder frame (151) facing the frame cover (152). . The inner blade holder (9) includes a holder frame (151) that pivotally supports the inner blade shaft (7a),
A sliding contact (163) is formed on the wall surface of the holder frame (151) facing the side end surface of the inner blade (7),
The sliding contact portion (173) of the oscillator (170) is in pressure contact with a sliding contact surface (7A) provided on a side end surface of the inner blade (7) through the sliding contact opening (163). Electric razor as described in The intermediate arm (172) of the vibrator (170) is formed in a curved shape along a concentric circle concentric with the inner blade shaft (7a) of the inner blade (7). The described electric razor. A sliding contact arm (180) in which a sliding contact portion (173) of the oscillator (170) is bent toward the side end surface of the inner blade (7) continuously to the intermediate arm (172), and a sliding contact arm ( 180) and a sliding contact claw (181) formed by bending the tip end of the portion 180 into a V shape,
The electric shaver according to claim 7, wherein the sliding contact claw (181) is in pressure contact with the sliding contact surface (7A) of the side end surface of the inner blade (7) . The inner blade (7) passing through the inner blade shaft (7a) with the fixed portion (171) and the sliding contact portion (173) of the vibrator (170) facing each other with the inner blade shaft (7a) therebetween. Arranged on the diameter line,
The electric shaver according to claim 7 or 8, wherein the sliding contact portion (173) is arranged on the upper side in the rotational direction of the inner blade (7) with respect to the fixed portion (171) . The sliding contact portion (173) of the vibration generator (170) is in pressure contact with the peripheral edge of the end wall (7b) provided on the side end surface of the inner blade (7). The described electric razor. A rotation stop piece (174) is folded and formed on the fixed portion (171) of the vibration generator (170),
The rotating stop piece (174) is joined to the horizontal frame portion (154) of the holder frame (151), and the vibration generator (170) is held and fixed so as not to rotate. The described electric razor. A rotation recess (176) is formed on the periphery of the fixed portion (171) of the vibration generator (170),
12. The rotating body (170) is held and fixed in a non-rotatable manner by engaging the locking recess (176) with the locking protrusion (165) of the holder frame (151). Electric razor as described in The buffer sheet (182) for reducing the sound pressure level of the tapping sound is disposed between the vibrating body (170) and the sliding contact surface (7A) of the cutting blade (7). The electric razor described in one . One end of the inner blade shaft (7a) of the inner blade (7) is pivotally supported by the inner blade holder (9),
The electric shaver according to claim 13, wherein the buffer sheet (182) is formed in a circular shape, and an insertion hole (183) is formed in the center thereof so as to be fitted to the inner blade shaft (7a) . The intermediate arm (172) and the sliding contact portion (173) are provided integrally with the fixed portion (171) of the vibration generator (170),
The electric shaver according to any one of claims 1 to 14, wherein the sliding contact portion (173) is in pressure contact with the sliding contact surface (7A) of the peripheral surface of the inner blade shaft (7a) of the inner blade (7) .

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