JP5576169B2 - Electric razor - Google Patents

Description

  The present invention relates to an electric razor in which a razor head is provided with an inner blade driving structure for converting rotational power of a motor into reciprocating power and transmitting it to the inner blade. In particular, the present invention relates to an electric razor in which an operation conversion mechanism for converting rotational power of a motor into reciprocating power is composed of a sliding piece that reciprocally slides left and right and an eccentric cam that reciprocally drives the sliding piece.

  In the inner blade drive structure, it is well known that the rotational power of a motor is converted into reciprocating power by a vibrator. The vibrator is composed of a pair of left and right elastic arms, a frame portion supported by both elastic arms, a cam groove provided in the frame portion, and the like, and when the cam groove and the frame portion are reciprocated by an eccentric cam. The upper and lower movement components are absorbed by both elastic arms.

  For example, Patent Document 1 discloses that the motion conversion mechanism is configured as a positive mechanism by a sliding piece that reciprocally slides left and right and an eccentric cam that reciprocally drives the sliding piece. There, the sliding piece is supported by a sliding plate attached to the main body case. Four steel balls for reducing sliding resistance are loaded on the lower surface of the sliding piece. The sliding piece is pressed against the sliding plate using a spring that presses the inner blade against the outer blade. In the motion conversion mechanism of Patent Document 2, the eccentric cam is composed of a cam body and a pair of elastic arms arranged in parallel with the cam body interposed therebetween, and the elastic arms are engaged with the cam grooves of the sliding piece. doing.

Japanese Utility Model Publication No.57-36131 (page 2, right column, lines 19 to 28, FIG. 1) Japanese Utility Model Publication No. 57-60787 (page 2, right column, lines 36 to 40, FIG. 7)

  In the known motion conversion mechanism that converts the rotational power of the motor into reciprocating power by the vibrator, it is necessary to secure a space for reciprocating the pair of left and right elastic arms and the frame portion inside the razor head. The razor head is easy to enlarge. In particular, it is inevitable that the vertical dimension of the razor head is increased. Moreover, the power loss at the time of motion conversion is large compared with the motion conversion mechanism comprised as a positive mechanism.

  In that respect, according to the motion conversion mechanism using the sliding piece as the motion conversion element, as in the electric razor of Patent Document 1, the space occupied by the motion conversion mechanism is reduced by the amount of omitting the elastic arm, and the razor head is It can be downsized to some extent. Further, since the sliding piece is supported by the sliding plate via the steel ball, the sliding resistance of the sliding piece can be reduced. However, although the sliding piece is pressed and urged against the sliding plate by a spring, there is room to move and move in the direction of floating away from the sliding plate, so it is not possible to suppress the generation of vibration and noise associated with motion conversion. .

  In the electric razor of Patent Document 2, the cam body and the pair of elastic arms constitute an eccentric cam, and the elastic arms absorb the variation in the gap between the eccentric cam and the cam groove. Can reduce noise caused by collision with the cam groove. On the other hand, since the rotational power is transmitted to the cam groove via the elastic arm, there is a difficulty in that the power loss accompanying the motion conversion becomes larger than that of the motion conversion mechanism of Patent Document 1.

The purpose of the present invention is to reduce the size and size of the razor head by reducing the size and size of the inner blade drive structure using the sliding piece as the conversion element, and at the same time suppress the generation of vibration and noise associated with the operation conversion, Another object of the present invention is to provide an electric razor that can suppress noise propagation and reduce driving noise.
An object of the present invention is to provide an electric razor that can efficiently drive an inner blade by reducing power loss at the time of motion conversion by a sliding piece and an eccentric cam.

The electric razor according to the present invention is provided with an inner blade driving structure for converting the rotational power of the motor 15 into reciprocating power and transmitting it to the inner blade 19b in the razor head 1 having the head frame 9 . Inner cutter drive structure, an eccentric cam 35 which is rotated by a motor 15, is reciprocated in the eccentric cam 35, a sliding piece 37 you transmitted to the inner cutter 19b reciprocating power that occurs with its reciprocating drive, sliding And a sliding structure that guides the movable piece 37 so as to be slidable back and forth in the left-right direction with the moving piece 37 sandwiched vertically. The head frame 9 includes a sliding base portion 16 that supports the sliding piece 37 thereon. An elastic body 38 is provided between the sliding structure and the sliding base portion 16 to absorb the gap between the sliding piece 37 and the structural parts of the sliding structure and prevent the sliding piece 37 from rattling.

  As shown in FIG. 1, the sliding structure includes a pressing body 47 and a sliding guide 48 that sandwich the sliding piece 37 vertically. The elastic body includes a sheet-like elastic mat 38 disposed between the sliding guide 48 and the head frame 9.

  The elastic mat 38, the sliding guide 48, and the sliding piece 37 are assembled to the head frame 9 in the order of description. As shown in FIG. 7, the elastic mat 38 is integrally provided with a sheet-like mat portion 58 and a plurality of bosses 60 provided on the mat portion 58. As shown in FIG. 8, a boss 60 is fitted to a pin 61 provided on the head frame 9, a sliding guide 48 is fitted to the boss 60, and the elastic mat 38 and the sliding guide 48 are integrated with the head frame 9. Turn into. The sliding piece 37 is pressed and held by a pressing body 47 fixed to the head frame 9.

  A guide structure is provided between the slide guide 48 and the slide piece 37 so as to reciprocally slide the slide piece 37 in the left-right direction by engaging with each other. As shown in FIG. 6, the guide structure includes a slide protrusion 53 provided on one of the slide guide 48 and the slide piece 37 and a slide groove 44 provided on the other.

  A friction reducing structure is provided on one of the sliding surfaces of the sliding piece 37 and the pressing body 47. As shown in FIG. 5, the friction reducing structure includes a plurality of protrusions 45 provided on either one of the sliding surfaces of the sliding piece and the 37 pressing body 47.

  A shielding wall 64 that covers the outer surface of the inner blade drive structure and shields noise is provided between the inner blade 19a and the pressing body 47 (see FIG. 5).

  In an electric razor having a rotary main blade 18 that is driven to rotate around a horizontal axis, an inner blade driving structure for the main blade is configured as follows. As shown in FIG. 1, the front gear group 20 that transmits the rotational power of the motor 15 laterally toward one side of the head frame 9 and the rotational power of the front gear group 20 in the vertical direction toward the inner blade 18a. The inner blade drive structure includes the rear gear group 21 that transmits power. An elastic mat 38, a sliding guide 48, a sliding piece 37, and a pressing plate 47 are disposed between the main blade 18 and the front gear group 20.

  The head frame 9 includes a base body 13 and a gear cover 14 attached to the upper surface of the base body 13 (see FIG. 4). The head frame 11 is assembled on the upper surface of the gear cover 14. The outer surface of the front gear group 20 assembled to the base body 13 is covered with a gear cover 14. Further, the outer surface of the gear cover 14 is covered with a shielding wall 64 provided on the head frame 11.

  In the electric shaver according to the present invention, the inner blade driving structure includes an eccentric cam 35, a sliding piece 37 reciprocally driven by the eccentric cam 35, and a sliding structure that slides and guides the sliding piece 37 while being vertically held. Configured. Thus, according to the inner blade drive structure using the sliding piece 37 as the conversion element, the space amount occupied by the inner blade drive structure is reduced compared to the conventional inner blade drive structure using the vibrator as the conversion element. Thus, the inner blade drive structure can be reduced in size and size, and the razor head 1 can be reduced in size. In addition, the elastic body 38 provided between the sliding structure and the head frame 9 absorbs the gap between the sliding piece 37 and the structural parts of the sliding structure, and the sliding piece 37 rattles up and down during operation conversion. Therefore, it is possible to suppress the generation of vibration and noise associated with the operation conversion and reduce the operation noise of the electric razor.

  When the pressing body 47 sandwiching the sliding piece 37 up and down and the sliding guide 48 constitute a sliding structure and the sliding piece 37 is pressed against the pressing body 47 by the elastic force of the sheet-like elastic mat 38, the inner blade is driven. Vibration and noise generated by the structure and the like can be absorbed and attenuated by the elastic mat 38. Therefore, it is possible to well prevent the vibration and noise accompanying the operation conversion, which are inevitable in the reciprocating electric shaver, from being radiated to the outside. Further, since the sliding piece 37 is pressed in a planar shape by the elastic force of the sheet-like elastic mat 38, the sliding piece 37 can always be pressed evenly toward the pressing body 47. Therefore, the sliding piece 37 can be smoothly reciprocated in a more stable posture to reduce the power loss at the time of motion conversion, and the inner blade 19a can be driven efficiently. For example, the space amount occupied by the elastic mat 38 can be reduced as compared with the case where the sliding piece is pressed and urged by a plurality of cantilevered elastic arms. Vibration and noise attenuation can be realized at the same time.

  When the elastic mat 38, the sliding guide 48, and the sliding piece 37 are assembled to the head frame 9 in the order described, and the sliding piece 37 is pressed and held by the pressing body 47 fixed to the head frame 9, each member 37, 38 is obtained. -47 and 48 can be closely attached without gaps. Therefore, it is possible to reliably eliminate the rattling of the sliding piece 37 and to more appropriately suppress the generation of vibration and noise associated with the motion conversion. When the boss 60 of the elastic mat 38 is fitted to the pin 61 provided on the head frame 9 and the sliding guide 48 is attached to the boss 60, the mat portion 58 absorbs the vibration in the vertical direction, and the boss 60 vibrates in the horizontal direction. Can be absorbed. Therefore, vibration generated in the inner blade drive structure can be effectively damped while the elastic mat 38 has a simpler structure. Since the sliding guide 48 is attached to the head frame 9 using the attachment structure of the elastic mat 38, there is an advantage that the structure of the inner blade driving structure can be simplified by omitting the fixing structure of the sliding guide 48.

  If a guide structure is provided between the slide guide 48 and the slide piece 37 so that the slide piece 37 slides and engages with each other, the elastic mat 38 can attenuate the propagation of noise generated in the guide structure. In addition, the operation noise of the electric razor can be further reduced to improve the quietness. In addition, when the guide structure is constituted by the slide protrusion 53 and the slide groove 44 provided between the slide guide 48 and the slide piece 37, the guide structure is compact by sliding the slide piece 37 with a simpler structure. The inner blade drive structure can be further miniaturized.

  When a friction reducing structure is provided on either one of the sliding surfaces of the sliding piece 37 and the pressing body 47, the sliding friction when the sliding piece 37 reciprocally slides is reduced, and the driving load of the sliding piece 37 is reduced. The inner blade 19a can be driven more efficiently. Further, when the friction reducing structure is constituted by a plurality of protrusions 45 provided on either the sliding piece or the sliding surface of the 37 pressing body 47, the structure for reducing friction is prevented from being unnecessarily complicated. However, the sliding friction of the sliding piece 37 can be accurately reduced.

  When a shielding body 64 that covers the outer surface of the inner blade drive structure is provided between the inner blade 19a and the pressing body 47, the sliding sound generated by the inner blade drive structure and noise accompanying vibration are shielded by the shield body 64. Thus, noise can be well prevented from radiating out of the shield 64. In addition, since the outer body of the razor head 1 and the shielding body 64 provided in the razor head 1 jointly block the noise, the leakage of the noise to the outside of the razor head 1 can be effectively reduced, and the electric razor. Can improve the quietness.

  An electric razor including a rotary main blade 18 that is driven to rotate about a horizontal axis includes an front gear group 20 and a rear gear group 21 to form an inner blade driving structure for the main blade. An elastic mat 38, a sliding guide 48, a sliding piece 37, and a pressing plate 47 are disposed between the main blade 18 and the front gear group 20. As described above, when the inner blade driving structure for the center blade or the trimmer blade is provided separately from the inner blade driving structure of the main blade, the inner blade 18a of the main blade and the inner blade 19b other than the main blade are 1 The motors 15 can be driven simultaneously. When an electric razor is used, gear noise is generated in the inner blade driving structure of the main blade. However, because the inner blade drive structure for the center blade or trimmer blade is arranged on the upper and outer surfaces of the inner blade drive structure for the main blade, the previous gear noise is blocked by the components of the latter inner blade drive structure. It is possible to prevent the gear noise from leaking outside the razor head 1.

  If the outer surface of the front gear group 20 is covered with the gear cover 14 and further the outer surface of the gear cover 14 is covered with the shielding wall 64 provided on the head frame 11, the gear noise propagation path is double-blocked by the gear cover 14 and the shielding wall 64. Thus, it is possible to more reliably prevent gear noise from leaking to the outside. Further, by covering the outer surface of the front gear group 20 in multiple layers, the space covered with the gear cover 14 and the shielding wall 64 can be made into a small space that is difficult to resonate, and therefore the noise level increases due to resonance of gear noise. Can be prevented.

It is a principle structure figure showing the outline of the inner blade drive structure concerning the present invention. It is a front view of an electric razor. It is the disassembled sectional view which isolate | separated and fractured | ruptured a part of razor head. It is an exploded sectional view of a head frame and a head frame. It is a vertical side view of a razor head. It is a vertical front view which shows an inner blade drive structure. It is a disassembled perspective view of an inner blade drive structure. It is the sectional view on the AA line in FIG. It is a vertical front view which shows another Example of an inner blade drive structure. It is a vertical front view which shows another Example of an inner blade drive structure. It is a front view which shows another Example of a sliding piece.

(Example) FIG. 1 thru | or 8 shows the Example which applied this invention to the rotary electric shaver. In the present invention, “front / rear”, “left / right”, and “upper / lower” refer to the cross arrows shown in FIG. 2 and FIG. In FIG. 2, the electric razor includes a razor head 1, a main body 2 that supports the razor head 1, and a shaving unit (not shown) disposed on the rear surface side of the main body 2. The main body 2 accommodates electrical components such as the secondary batteries 3 and 3 and the circuit board 4, and a switch button 5 for switching the energization state of the motor 15 and a plurality of switches are provided on the front surface of the main body 2. The light emission display part 6 comprised by these light emission parts is provided (refer FIG. 2).

  3, the razor head 1 has a head frame 9, a motor holder 10 and a head frame 11 fixed to the lower surface and the upper surface of the head frame 9, an outer blade holder 12 attached to and detached from the head frame 11, and the like as outer bodies. It is configured. The head frame 9 includes a base body 13 and a gear cover 14 attached to the upper surface of the base body 13 (see FIG. 4). A motor 15 for driving the main blade 18 and the center blade 19 is disposed inside the motor holder 10. The entire razor head 1 is supported by the main body 2 so as to be able to float in all directions of front and rear, left and right, and up and down.

  As shown in FIG. 5, a pair of front and rear main blades 18 and a center blade 19 are arranged on the upper part of the razor head 1, and both inner blades 18 a and 19 a are connected to the inner blade for the main blade by the power of the motor 15. The blade can be driven via the blade driving structure and the inner blade driving structure for the center blade. In the inner blade driving structure for the main blade, the rotational power of the motor 15 is transmitted to the inner blade 18a of the main blade 18 via the front gear group 20 and the rear gear group 21 (see FIG. 1). The inner blade 18a is formed by fixing a group of small blades around a round shaft blade holder in a spiral shape. The outer blade 18 b is formed of a mesh blade and is assembled to the outer blade holder 12.

  The front gear group 20 includes a first gear 24 fixed to the output shaft of the motor 15, a second gear 25 meshing with the first gear 24, and rotational power of the second gear 25 around the horizontal gear shaft 28. The third gear 26 and the fourth gear 27, which are a pair of bevel gears, are converted to Thus, the front gear group 20 transmits the rotational power of the motor 15 laterally toward the left end of the head frame 9, and its upper outer surface is covered with the gear cover 14 (see FIG. 6). The gear shaft 28 is rotatably supported by a dedicated bearing unit 29.

  As described above, surrounding the front gear group 20 with the base body 13, the gear cover 14, and the bearing unit 29 can prevent the gear noise generated in the front gear group 20 from leaking to the outside. As shown in FIGS. 1 and 3, the rear gear group 21 includes a gear train 30 provided between the gear shaft 28 and the inner blade shaft of the main blade 18, and the rotational power of the front gear group 20 is increased. It is transmitted vertically toward the inner blade 18a.

  As shown in FIG. 3, the inner blades 18 a of the pair of front and rear main blades 18 are rotatably supported by a reverse portal inner blade frame 32. The previous gear train 30 is arranged in a gear chamber 33 provided on one side of the inner blade frame 32 except for the first gear fixed to the gear shaft 28. The inner blade frame 32 is detachably mounted on the upper surface of the head frame 11.

  The inner blade drive structure for the center blade converts the rotational power of the motor 15 into reciprocating power and transmits it to the inner blade 19 a of the center blade 19. Specifically, as shown in FIG. 1, an eccentric cam 35 fixed to the output shaft of the motor 15, a slide piece 37 connected to the eccentric cam 35 via a cam groove 36, and the slide piece 37 are slid left and right. A sliding structure that guides freely and an elastic mat (elastic means) 38 constitute an inner blade driving structure for the center blade. The inner blade 19a of the center blade 19 is formed in a comb shape. The outer blade 19b is formed in a slit blade shape, and is assembled together with the inner blade 19a at the front and rear center of the outer blade holder 12 (see FIG. 3). A passive frame 39 that is engaged with a drive shaft 42 described later and inherits the reciprocating power of the sliding piece 37 is fixed to the inner blade 19a. The inner blade 19a is always pressed against the outer blade 19b by a leaf spring (not shown).

  In FIG. 7, the sliding piece 37 includes a rectangular plate-shaped main wall 41, a drive shaft 42 protruding from the upper surface of the main wall 41, and a drive arm 43 for a shaving blade that is continuously provided from the rear of the main wall 41. It consists of a plastic molded product with A long cam groove 36 in the front-rear direction that engages with the eccentric pin 35 a of the eccentric cam 35 is formed in the center of the lower surface of the main wall 41, and a slide groove 44 that is long in the left-right direction is formed on the left and right sides of the cam groove 36. A dent is formed. At the four corners of the upper surface of the main wall 41, protrusions (friction reducing structures) 45 are integrally formed. The protrusion 45 is in contact with the pressing plate 47 and reduces sliding friction between the sliding piece 37 and the pressing plate 47.

  The sliding structure for slidingly guiding the sliding piece 37 includes a pressing plate (pressing body) 47 and a sliding guide 48 that sandwich the sliding piece 37 vertically. The sliding base portion 16 is provided on the upper surface of the gear cover 14 in order to dispose the motion converting portions such as the sliding piece 37, the elastic mat 38, the pressing plate 47, and the sliding guide 48. The mounting portions 17 and 17 for the pressing plate 47 are provided in a protruding manner. As shown in FIG. 7, the right mounting portion 17 has a long seat wall in the front and rear, and a pilot hole 50 for the screw 49 is formed in the front and rear. The left mounting portion 17 is separately disposed on the front and back of the cover wall covering the upper surface of the fourth gear 27, and a pilot hole 50 for a screw 49 is formed on each of the front and rear seat walls.

  The pressing plate 47 is formed by punching a stainless steel plate into a U shape, and the gear cover 14 is formed by screwing screws 49 into the pilot holes 50 with the four corners of the plate surface being placed on the mounting portions 17 and 17. Fixed to. In this fixed state, the protrusion 45 is received by the pressing arms 56 before and after the pressing plate 47, and the sliding piece 37 is slidably guided in cooperation with the sliding guide 48. As described above, the head frame 9 is composed of the base body 13 and the gear cover 14 mounted on the upper surface of the base body 13, so that the sliding base portion 16 and the mounting portion 17 are formed on the upper portion of the head frame 9. It can be said that it is provided.

  The sliding guide 48 is formed of a square plate-like plastic molded product, and a relief hole 51 for the eccentric cam 35 is formed in a vertically penetrating manner in the center of the plate surface, and connection holes 52 are formed at four locations around the relief hole 51. It is. In addition, a pair of left and right slide projections 53 are formed on the upper surface of the slide guide 48 with the previous clearance hole 51 interposed therebetween, and projections 54 that support the lower surface of the slide piece 37 are formed at the four corners. It is. The slide projection 53 engages with the previous slide groove 44 and guides the slide piece 37 so that only the left and right slides are possible. The slide groove 44 and the slide protrusion 53 constitute a guide structure for slidingly guiding the slide piece 37. The protrusions 54 provided at the four corners support the sliding piece 37 that slides left and right, and reduces sliding friction between the sliding guide 48 and the sliding piece 37.

  A sheet-like elastic mat (elastic body) 38 for absorbing vibration and noise is disposed between the sliding guide 48 and the sliding base portion 16 of the gear cover 14 (head frame 9). The elastic mat 38 is made of a rubber molded product made of butadiene synthetic rubber represented by NBR, and a relief hole 59 for the eccentric cam 35 is formed in a vertically penetrating manner in the center of the sheet-like mat portion 58. Boss 60 is formed at four locations around escape hole 59. The mat portion 58 of the elastic mat 38 absorbs vibration and noise, and at the same time, absorbs a gap between the sliding piece 37 and the structural parts of the sliding structure to prevent the sliding piece 37 from rattling. Function.

  Each part which comprises the inner blade drive structure for center blades is assembled as follows. First, the mat portion 58 is placed on the upper surface of the sliding base portion 16 with each boss 60 of the elastic mat 38 engaging with the four pins 61 provided on the sliding base portion 16 of the gear cover 14 (head frame 9). Assemble. Further, the sliding guide 48 is assembled to the elastic mat 38 in a state where the connecting hole 52 is fitted to each boss 60, and the mat portion 58 and the sliding guide 48 are integrated with the gear cover 14 (head frame 9). Next, the slide groove 44 of the slide piece 37 is engaged with the slide protrusion 53 of the slide guide 48, and the pressing plate 47 provided on the upper surface of the slide piece 37 is fastened to the mounting portion 17, thereby sliding. The piece 37 is clamped up and down by the pressing plate 47 and the sliding guide 48.

  In the assembled state, the slide piece 37 is guided so as to be slidable in the left and right directions, and the eccentric pin 35 a is connected to the cam groove 36 of the slide piece 37. The left and right widths of the cam groove 36 and the diameter of the eccentric pin 35a are set so that no gap is generated between the two 35a and 36. Therefore, it is possible to suppress the occurrence of the collision sound of both the members 35a and 36 at the stroke end when the sliding piece 37 slides left and right.

  The vertical distance H1 (see FIG. 5) between the pressing plate 47 and the sliding base portion 16 of the gear cover 14 that supports the elastic mat 38 is related to the total thickness of the sliding piece 37 and the components of the sliding structure. Set with. The sum of the upper and lower thicknesses of the sliding piece 37 and the components of the sliding structure is the thickness of the mat portion 58 of the elastic mat 38 in the free state, the thickness including the protrusion 54 of the sliding guide 48, This is the total thickness including the protrusions 45. When the sum of the vertical thicknesses is H2, the relationship with the previous vertical interval H1 is (H1 ≦ H2).

  As described above, when the total vertical thickness H2 on the sliding structure side is set to be equal to or larger than the vertical distance H1, the elastic mat 38, the sliding guide 48, the sliding piece 37, and the pressing plate 47 are set. There is no room for gaps between the members. Therefore, it is possible to prevent the sliding piece 37 from rattling up and down when reciprocating. Incidentally, if (H1> H2), a gap is generated between the members of the elastic mat 38, the sliding guide 48, the sliding piece 37, and the pressing plate 47. It cannot prevent the moving piece 37 from shaking up and down. Further, in the case of (H1 <H2), the dimensional variation exceeding the vertical distance H1 can be absorbed by the mat portion 58 and the respective members can be brought into close contact with each other. Therefore, the management of the vertical distance H1 when assembling the respective members is strictly controlled. The sliding piece 37 can be smoothly slid back and forth while preventing rattling.

  The head frame 11 is a structure for attaching the inner blade frame 32 and the outer blade holder 12, and is made of a cap-shaped plastic molded product that opens downward. As shown in FIG. 4, a shielding wall (shielding body) 64 is provided on the upper surface of the head frame 11 to cover the upper surface of the inner blade driving structure for the center blade. And is detachably attached. An opening 65 for the drive shaft 42 of the sliding piece 37 is formed at the center of the shielding wall 64, and a gap between the opening 65 and the drive shaft 42 is sealed with a seal body 66 (see FIG. 5). Therefore, the cut fluff does not enter the inside of the shielding wall 64, and noise generated by the inner blade drive structure for the center blade is radiated out of the shielding wall 64 by the shielding wall 64. Can be blocked. Although not shown, a lock structure for locking the inner blade frame 32 attached to the shield wall 64 is provided inside the shield wall 64.

  According to the electric razor configured as described above, the amount of space occupied by the inner blade drive structure can be reduced compared to the conventional inner blade drive structure using a transducer as a conversion element, and the inner blade drive structure can be made smaller and more compact. Therefore, the razor head 1 can be miniaturized. In addition, the elastic mat 38 absorbs the gaps between the sliding guide 48, the sliding piece 37, and the pressing plate 47, and can reliably eliminate the sliding piece 37 sliding back and forth. Therefore, it is possible to suppress the generation of vibration and noise associated with the rattling of the sliding piece 37, and to reduce the operating noise of the electric razor.

  Since the sliding piece 37 is supported by the rubber elastic mat 38, vibration and noise generated by the inner blade drive structure and the like can be absorbed and attenuated by the elastic mat 38, and at the same time, propagation of vibration and noise can be blocked by the elastic mat 38. . Further, since the sliding piece 37 is pressed and held by the pressing plate 47, vibration generated in the inner blade drive structure and the like can be absorbed and attenuated by the front and rear pressing arms 56, and propagation of vibration via the pressing plate 47 can be blocked. In other words, each component is effective so that the vibration above the sliding piece 37 can be damped by the pressing plate 47 and the mounting portion 17, and the vibration below the sliding piece 37 can be damped by the elastic mat 38. It is arranged in. Therefore, it is possible to well prevent leakage of vibration and noise associated with motion conversion, which cannot be avoided in the reciprocating electric shaver. Further, since the sliding piece 37 is supported by the sheet-like elastic mat 38, the sliding piece 37 can be smoothly slid back and forth in a more stable posture to reduce power loss at the time of motion conversion.

  FIG. 9 shows an embodiment in which the inner blade driving structure of the present invention is applied to a reciprocating electric shaver. In this case, the main blade 18 is composed of an inner blade 71 made of a slit blade and an outer blade 72 made of a mesh blade so that the inner blade 71 can be driven via the inner blade drive structure described in the previous embodiment. did. In this embodiment, the head frame 11, the gear cover 14, the front gear group 20, the rear gear group 21, and the like in the previous embodiment are omitted, so that the base body 13 functions as the head frame 9. Accordingly, the elastic mat 38, the sliding guide 48, and the sliding piece 37 constituting the inner blade driving structure are assembled to the sliding base portion 16 provided on the upper surface of the base body 13, and the seat of the mounting portion 17 is assembled. It is held down by a pressing plate 47 fastened to the wall. In addition, the upper and outer surfaces of the inner blade drive structure are covered with a shield 64 configured as an independent part so that noise can be blocked from being radiated out of the shield 64.

  The inner blade 71 is fixed to an inner blade frame 76 made of a plastic molded product, and a round shaft-shaped passive portion 77 connected to the drive shaft 42 is provided at the lower center of the inner blade frame 76. An elastic arm 78 that engages with the passive portion 77 is formed integrally with the upper portion of the drive shaft 42 of the sliding piece 37. Reference numeral 79 denotes a spring that presses the inner blade 71 against the outer blade 72, and is constituted by a compression coil spring. Since others are the same as the previous embodiment, the same reference numerals are assigned to the same members, and descriptions thereof are omitted. The same applies to the following embodiments.

  FIG. 10 shows an embodiment in which the inner blade driving structure of the present invention is applied to a reciprocating electric shaver as in FIG. 9, but the driving structure of the sliding piece 37 by the eccentric cam 35 is different. The eccentric cam 35 is disposed at a position eccentric from the output shaft of the motor 15, is rotatably supported by the bearing 81, and is rotationally driven via the flexible shaft 82. The eccentric cam 35 and the drive pin 83 provided on the lower surface of the sliding piece 37 are connected via an interlocking arm 84. Boss 85 is provided at each end of the interlocking arm 84, one boss 85 is connected to the eccentric pin 35 a of the eccentric cam 35, and the other boss 85 is connected to the drive pin 83. Thus, when the eccentric cam 35 and the slide piece 37 are connected via the interlocking arm 84, only the left and right slide components of the eccentric rotation operation of the eccentric pin 35a are transmitted to the slide piece 37, and the slide piece 37 is thus transmitted. Can be driven by sliding. The motor 15 is provided in the main body 2.

  As described above, when the rotational power of the motor 15 is transmitted to the eccentric cam via the flexible shaft 82, the razor head 1 can be supported by the main body 2 so as to be able to float in all directions of front and rear, left and right, and up and down. A plurality of floating springs 87 for returning the razor head 1 to the neutral position are disposed between the base body 13 and the main body 1, and the entire periphery thereof is sealed with a seal body 88. In this embodiment, the pressing body 47 is formed in a hat shape, its lower wall is fastened to the sliding base portion 16 of the base body 13, and the sliding piece 37 is moved by the front and rear pressing arms 56 provided on the upper portion thereof. Pressed.

  FIG. 11 shows another embodiment of the sliding piece 37. There, the sliding piece 37 was pressed and urged by an elastic arm (elastic body) 38 instead of the elastic mat. The elastic arm 38 is formed in a cantilevered manner from the four corners of the main wall 41, and slides in a state where the sliding piece 88 provided at the extended end is in contact with the upper wall of the gear cover 14. The whole piece 37 is pushed up and biased. A slide protrusion 53 that engages with the slide groove 44 is provided on the gear cover 14.

  In the above embodiment, the protrusion 45 is provided on the sliding piece 37, but the protrusion 45 can be provided on the pressing plate 47 side. Further, the slide groove 44 can be provided on the slide guide 48, and the slide protrusion 53 can be provided on the slide piece 37. The elastic mat 38 can be bonded to the sliding guide 48 in advance. The boss 60 is engaged with the fitting hole provided in the gear cover 14, the pin provided on the lower surface of the sliding guide 48 is engaged with the boss hole of the boss 60, and the elastic mat 38 and the sliding guide 48 are connected to the gear cover 14. Can be integrated.

DESCRIPTION OF SYMBOLS 1 Razor head 9 Head frame 14 Gear cover 15 Motor 19a Inner blade 20 Front gear group 21 Rear gear group 35 Eccentric cam 37 Sliding piece 38 Elastic body (elastic mat)
42 Drive shaft 44 Slide groove 45 Protrusion 47 Press body (press plate)
48 Sliding guide 53 Slide protrusion 58 Mat portion 64 Shielding wall

Claims (3)

Inside the razor head (1) having the head frame (9), an inner blade drive structure for converting the rotational power of the motor (15) into reciprocating power and transmitting it to the inner blade (19b) is provided.
The inner blade drive structure is driven by the eccentric cam (35) rotated by the motor (15) and reciprocated by the eccentric cam (35), and the reciprocating power generated by the reciprocating drive is transmitted to the inner blade (19b). A sliding piece (37), and a sliding structure that guides the sliding piece (37) so as to be slidable back and forth in the left-right direction with the sliding piece (37) sandwiched vertically.
The head frame (9) includes a sliding base (16) that supports a sliding piece (37) above it,
The gap between the sliding piece (37) and the components of the sliding structure is absorbed between the sliding structure and the sliding base (16) to prevent the sliding piece (37) from rattling. An electric shaver provided with an elastic body (38). The sliding structure is composed of a pressing body (47) and a sliding guide (48) sandwiching the sliding piece (37) up and down,
The electric razor according to claim 1, wherein the elastic body comprises a sheet-like elastic mat (38) disposed between the sliding guide (48) and the head frame (9). The elastic mat (38), the sliding guide (48), the sliding piece (37), and the pressing body (47) are assembled to the head frame (9) in the order of description,
The elastic mat (38) is integrally provided with a sheet-like mat portion (58) and a plurality of bosses (60) provided on the mat portion (58).
A boss (60) is fitted to a pin (61) provided on the head frame (9), and a sliding guide (48) is attached to the boss (60), and an elastic mat (38) and a sliding guide (48) are mounted. ) Is integrated with the head frame (9),
The electric shaver according to claim 2, wherein the sliding piece (37) is pressed and held by a pressing body (47) fixed to the head frame (9).

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