JP4134276B2 - Flush-type electric razor - Google Patents

Description

  The present invention relates to a water-washing type electric shaver.

  This type of electric shaver is known, for example, from US Pat. In order to prevent water from entering during washing, a seal rubber is interposed between the case and the blade mounting base, and another seal rubber is interposed between the blade mounting base and the presser plate.

  Regarding the present invention, an electric razor in which a head incorporating two inner blades is swingable is known from Patent Document 2. In this electric razor, a seal rubber is provided between the main body case and the head case, but this seal is provided to prevent dust from entering the main body case and is intended to be washed with water. is not.

Japanese Examined Patent Publication No. 62-58755 JP-A-9-38354

  In the conventional electric shaver, no seal rubber is provided on the output shaft of the motor.

  As shown in FIG. 2, the electric razor according to the present invention is housed in a main body case (1) having an assembly port (2) open at least at the upper end and a main body case (1) from the side of the assembly port (2). A razor unit (3). The razor unit (3) includes a chassis unit (10) and a head unit (11). The chassis unit (10) includes a motor (12) and a motor housing portion that can house the motor (12). A main frame (23) with (22) is included. The head unit (11) includes a base (30), an inverted portal head frame (29) positioned above the base (30), and a swing frame supported by the head frame (29) so as to be able to swing back and forth. (31), an inner blade (15) assembled to the swing frame (31), and an outer blade holder (47) having an outer blade (16) fitted and fitted to the swing frame (31). It is out. It is configured so that fuzz accumulates in the internal space formed by the swing frame (31) and the outer blade holder (47). The chassis unit (10) and the head unit (11) are combined to be joined together in the vertical direction, and the first waterproof seal (70) is provided between the chassis unit (10) and the head unit (11). ) To seal the gap between the output shaft (12a) of the motor (12) and the head unit (11), and the periphery of the joint portion between the chassis unit (10) and the head unit (11) In the state where the second waterproof seal (71) is provided and the razor unit (3) is inserted and loaded into the main body case (1) and fixed, the gap between the main body case (1) and the razor unit (3) is It is sealed at the peripheral edge of the second waterproof seal (71).

  By installing and inserting a structure in which the head unit 11 and the chassis unit 10 are combined from above the main body case 1, waterproofing by the first waterproof seal 70 and the second waterproof seal 71 can be achieved.

  1 to 13 show an embodiment applied to a rotary electric shaver according to the present invention. In FIG. 2, the electric razor has a cylindrical main body case 1 whose upper and lower surfaces are open, and the razor unit 3 is assembled into the case from the side of the upper assembly port 2, before and after the outer surface of the main body case 1. A switch knob 4 for starting the motor and a switching knob 5 for raising and lowering the shaving blade are arranged, and a lock knob 6 for swinging lock is provided on one side of the main body case 1. A charging bottom case 8 is assembled to the lower assembly port 7 of the main body case 1.

(Razor unit)
In FIG. 3, the razor unit 3 is roughly divided into a chassis unit 10 and a head unit 11, and electric components such as a motor 12, a battery (secondary battery) 13, and a circuit board 14 are collectively arranged on the chassis unit 10 side. A rotary inner blade (inner blade) 15, an outer blade 16 (see FIG. 2) and a transmission mechanism 17 (see FIG. 4) for transmitting the power of the motor 12 to the rotary inner blade 15 on the head unit 11 side, and a sharp shaving blade system The transmission mechanism 18 and the transmission mechanism 19 of the center blade system are centrally arranged.

(Chassis unit)
3, the chassis unit 10 includes a main frame 23 having a loading recess 21 for the battery 13 on the lower half side and a motor housing portion 22 on the upper side, and a motor case 24 in which the motor 12 is loaded and held. Constitute. The motor case 24 is supported by the motor housing portion 22 so as to be movable up and down, and is supported by a compression coil spring 25 interposed between the main frame 23 and the motor case 24. By engaging the four engaging claws 26 provided integrally with the motor case 24 with the engaging portion on the main frame 23 side, the upper limit of the floating of the motor case 24 is defined, and the escape is prevented. Yes. Thus, the motor case 24 is floatingly supported in order to allow the head unit 11 to move up and down during use, to soften the skin contact, and to ensure follow-up to the skin surface.

(Head unit)
The head unit 11 includes an inverted portal head frame 29 having a gear chamber 28 on the lower surface side, a base 30 that closes the bottom opening of the gear chamber 28, and a swing frame 31 that is supported by the head frame 29 so as to be able to swing back and forth. And the like, and the inner blade 15, the outer blade 16, the transmission mechanisms 17 to 19, etc. are assembled with them.

(Inner blade transmission system)
In FIG. 4, the transmission mechanism 17 for the rotating inner blade 15 is disposed on one side of a head group 29 and a gear group G <b> 1 to G <b> 3 that is housed in the gear chamber 28 shown in FIG. 3 and decelerates the power of the motor 12. Gear groups G4 to G6, and gear groups G7 to G9 that are disposed on the swing frame 31 side and transmit the rotational force of the final gear G6 of the latter gear group to the pair of rotary inner blades 15 and the like. Of the gear groups G <b> 1 to G <b> 3 in the gear chamber 28, the first-stage gear G <b> 1 includes an internal gear, and a driving gear G <b> 20 fixed to the output shaft 12 a of the motor 12 is engaged with the internal gear. By the driving gear G20 and the internal gear, the rotation speed (8000 to 9000 rpm) of the motor 12 is reduced to 2500 to 3000 rpm, which is substantially the same rotation speed as the rotation inner blade 15 at the time of driving. Therefore, compared with a conventional rotary electric shaver that is gradually reduced by a plurality of reduction gears, vibration during use can be reduced and noise can be reduced. Camera shake is unlikely to occur. Note that the final gear G3 and the next gear G4 of the gear group in the gear chamber 28 change their rotational directions to orthogonal via face gear teeth protruding from the side surface of the latter gear G4.

(Kiwasha shaving transmission system)
The front gear G1 also serves as a drive gear for the transmission mechanism 18 for the sharp shaving blade and the transmission mechanism 19 for the center blade system, and an eccentric cam 33 for the former transmission mechanism 18 and the latter transmission mechanism 19 on the upper part thereof. The eccentric pin 34 is integrally provided (see FIG. 4). As shown in FIG. 5, the eccentric cam 33 reciprocates the vibrator 35 disposed on the upper surface of the upper wall of the gear chamber 28 to drive the hair clipper type shaving blade unit 36. One end of the vibrator 35 is pivotally supported, and the other end has a bifurcated continuous portion 37. The sharp shaving blade unit 36 is mounted on the upper part of the switching knob 5. When the switching knob 5 is slid upward from the lower standby position, the entire unit 36 jumps up around the shaft 38 as shown by an imaginary line. The passive piece 99 that swings and is fixed to the movable blade engages with the connecting portion 37 to inherit the reciprocating motion of the vibrator 35.

(Swing mechanism and center blade drive system)
In FIG. 3, the swing frame 31 includes a reverse portal-shaped upper frame 41, a lower frame 42 that is press-fitted and engaged with the upper frame 41 from the lower surface side, and a lid 46 that closes the upper surface opening of the lower frame 42. (Refer to FIG. 5), and the rotary inner blade 15 is rotatably supported around the upper and lower sides of the both side walls of the upper frame 41. The lower frame 42 can swing back and forth about a shaft 43 that is pivotally supported at the upper end of the head frame 29, thereby enabling the swinging motion of the swing frame 31. A second vibrator 44 for reciprocating the center blade 48 (see FIG. 5) to the left and right is provided in the chamber between the upper frame 41 and the lower frame 42 (see FIG. 4). The eccentric pin 34 can be driven to reciprocate. The passive groove 45 that engages with the eccentric pin 34 shown in FIG. 4 is formed as an arc-shaped groove that is long in the front-rear direction corresponding to the front-back swing range of the swing frame 31 (see FIG. 5).

(Center blade)
4 and 5, the outer blade 16 for each rotating inner blade 15 is mounted on the outer blade holder 47 that is externally fitted to the swing frame 31, and the center blade 48 is further interposed between the outer blades 16, 16. Provide. The center blade 48 is composed of an outer fixed blade 49 formed in a comb blade shape and a movable blade 50 that reciprocally slides inside as a single unit component. In a state where the outer blade holder 47 is mounted on the swing frame 31, the connecting piece 51 provided at the lower portion of the movable blade 50 is engaged with the drive shaft 52 protruding from the upper surface of the previous vibrator 44, and the vibrator 44 reciprocal motions are inherited. Therefore, the rotational speed of the rotating inner blade 15 and the reciprocating frequency of the center blade 48 during driving are driven at approximately the same 2500 to 3000 times / minute. A gap between the drive shaft 52 and the upper frame 41 is sealed with a rubber packing 53 that prevents intrusion of hair chips.

(Swing lock)
As shown in FIG. 6, a lock knob 6 is provided for restricting the swing motion of the swing frame 31. A lock bar 54 projects from the upper part of the inner surface of the lock knob 6. The upper end of the lock bar 54 penetrates the head frame 29 up and down and faces the lower surface of the swing frame 31. Therefore, when the lock knob 6 is slid upward from the lower standby position, the lock rod 54 comes into contact with and engages with the engagement groove 58 provided in the lower portion of the side wall of the lower frame 42, so that the back-and-forth swing can be restricted.

(Lock and safety switch for outer blade holder)
When the outer blade holder 47 is removed from the swing frame 31, the two rotating inner blades 15 are exposed, and if the switch knob 4 is turned on in this state, the rotating inner blade 15 is driven, which is dangerous. In order to avoid such a situation, as shown in FIG. 7, a lock piece 55 is arranged inside the swing frame 31, and the lock piece 55 is unlocked by an unlock button 56 attached to the side cover of the head frame 29. It can be operated. Further, a safety switch 57 for preventing energization of the motor 12 (see FIG. 4) is arranged in the previous motor case 24 in conjunction with the removal operation of the outer blade holder 47.

(Rock piece)
In FIG. 8, the lock piece 55 includes an elastic frame 60 having a thin hinge 59 in the middle, and a pair of claw arms 61 provided on both side ends of the elastic frame 60. A total of four lock claws 62 are projected in the front and rear. When the previous button 56 is pushed in against the urging force of the spring, the operation pin 63 enters the frame through the pin hole formed in the side wall of the swing frame 31 (see FIG. 3). The claw arm 61 is pushed in and operated. As a result, the engagement between the two lock claws 62 and the outer blade holder 47 on the pushed side is released. At this time, since the mountain-shaped side short portion 60a of the elastic frame 60 is received by the inner wall surface of the swing frame 31, the elastic frame 60 is bent at the thin hinge portion 59, and as a result, the other claw arm 61 is The button 56 is pulled in the direction opposite to the pushing direction, and the engagement between the lock claw 62 provided on the side surface and the outer blade holder 47 is released.

(Safety switch)
A safety switch 57 is arranged in series between the battery 13 in the circuit (see FIG. 3) and the motor 12, as shown in FIG. 7, in addition to the power switch for on / off control. In FIG. 7, the safety switch 57 is switched by the operation of the relay piece 65 for operation relay assembled in the gear chamber 28 and the interlocking piece 66 slidably mounted on the side surface of the swing frame 31. The relay piece 65 is pushed upward and biased by a spring 67, and its upper end is always in contact with the lower surface of the interlocking piece 66. Further, the interlocking piece 66 is received by the lower end of the side wall of the outer blade holder 47 and the upward sliding is restricted. Therefore, when the outer blade holder 47 is removed from the swing frame 31, the interlocking piece 66 and the relay piece 65 are slid upward as shown in FIG. 6, and as a result, the safety switch 57 is switched from the on state to the off state. Reference numeral 68 denotes a switching piece that passes through the bottom wall of the base 30 and faces the safety switch 57 in the vertical direction.

(Waterproof seal)
In order to make the head unit 11 configured as described above washable, a first waterproof seal 70 is provided between the output shaft 12a of the motor 12 and the base 30 as shown in FIG. Intrusion to the motor 12 and the motor case 24 side is prevented. Further, a second waterproof seal 71 is provided between the lower surface (joint surface) of the base 30 and the upper peripheral edge of the chassis unit 10 so that the cleaning water enters the main frame 23, the motor case 24, and the main body case 1. Is preventing.

(First waterproof seal)
In FIG. 9, the first waterproof seal 70 is made of a rubber or synthetic rubber circular cap-shaped molded packing, and has a peripheral side wall 72 that fits outside the boss portion of the motor 12 and an upper wall 73 having a corrugated cross section. A seal hole 74 is provided in the center of the upper wall 73, and a lip that is in close contact with the output shaft 12 a is provided on the inner surface of the seal hole 74. On the lower surface of the base 30, there is provided a loading recess 75 that holds the first waterproof seal 70 in cooperation with the motor 12.

(Second waterproof seal)
In FIG. 10, the second waterproof seal 71 is made of rubber or synthetic rubber molded packing, and includes an upper seal portion 77 that seals the gap between the motor case 24 and the base 30, the main body case 1, and the main frame 23. A peripheral seal portion 78 that seals the gap between them and a membrane wall 79 that connects both seal portions 77 and 78 are formed in a cap shape. In order to properly position the second waterproof seal 71 or prevent the peripheral seal portion 78 from being turned over or displaced when the chassis unit 11 is inserted and loaded into the main body case 1, an endless annular outer seal frame 81 is provided at the upper end of the main frame 23. The engaging groove 82 is formed in a circular shape along the peripheral side surface. Further, an endless annular inner seal frame 83 is provided at the upper end of the motor case 24, and an engaging step portion 84 is formed in a circular shape along the inner peripheral surface thereof. On the lower inner edge of the peripheral seal portion 78, a rib 85 that is fitted in the engagement groove 82 in a close contact state is provided. On the lower surface of the upper seal portion 77, a groove 86 is provided that is received by the engagement step portion 84 and is externally fitted to the inner seal frame 84.

  After the first waterproof seal 70 and the second waterproof seal 71 are assembled on the chassis unit 10 side as described above, the base 30 is assembled to the motor case 24 and fastened and fixed with screws, so that both seals 70 and 71 are attached to the base. 30 is fixed between the motor 12 and the motor case 24. The base 30 and the head frame 29 are fastened and fixed by screws screwed from the upper surface side of the gear chamber 28. The safety switch 57 and the switching piece 68 are vertically opposed to each other through the membrane wall 79 of the second waterproof seal 71 (see FIG. 7). The motor case 24 can move up and down with respect to the main frame 23. In order to absorb this vertical movement, the wall surface of the membrane wall 79 adjacent to the upper seal portion 77 is formed in an L-shaped cross section so that the membrane wall 79 can be bent and deformed in the vertical direction.

(Relationship between the second waterproof seal and the body case)
The chassis unit 10 is inserted and loaded into the main body case 1 and the peripheral edge seal portion 78 is brought into close contact with the inner surface of the case, thereby sealing the gap between the two 10. In order to ensure this sealing action and facilitate the assembly at the same time, the inner surface of the assembly port 2 of the main body case 1 is formed in a tapered shape, and a sealing wall 90 inclined downward is provided at the lower end. ing. Thus, when the downwardly inclined sealing surface wall 90 is provided, the main frame 23 and the main body 23 are screwed into the screw boss at the lower end of the main frame 23 by screwing the screws 91 from the lower surface side of the bottom case 8 as shown in FIG. The case 1 is fixed so as not to be separable, and the tightness of the peripheral seal portion 78 with respect to the seal surface wall of the main body case 1 is strengthened and the adhesion is improved. In order to prevent the cleaning water from entering the inside of the case from the joint surface between the bottom case 8 and the main body case 1, a plug seal 92 made of molded packing is sandwiched and fixed between the joint surfaces of the both 1 and 8. Further, a seal ring 93 is sandwiched and fixed between the joint surfaces of the previous screw boss and the bottom case 8.

(Switch knob and vent port)
As shown in FIG. 2, the switch knob 4 is supported by a decorative frame 94 fixed to the outer surface of the case so as to be slidable up and down. A lock button 95 is provided in the center of the plate surface of the switch knob 4. The switch knob 4 can be slid upward and operated only when the button 95 is depressed. The sliding movement of the switch knob 4 is transmitted to the connection terminal via an interlocking piece provided on the inner surface of the decorative frame 94 and a switching piece provided on the main body case 1. A waterproof oil ring is also sandwiched and fixed to the shaft portion of the switching piece that penetrates the peripheral wall of the main body case 1 in and out. As shown in FIG. 11, a gas vent 100 for releasing hydrogen gas that may be generated during abnormal charging such as overcharging of the battery 13 is opened on the lower side of the case body 1. The gas vent 100 is closed with a separation sheet 101 that allows only gas to pass and does not allow moisture to pass through, and a gap between the outer peripheral edge and the packing retainer 102 is sealed with an oil ring 103. The packing presser 102 is press-fitted to the main body case 1.

(Washing method)
When cleaning the rotating inner blade 15 of the head unit 11 and its periphery, the outer blade holder 47 is removed, the safety switch 57 is turned off, and running water is poured onto the rotating inner blade 15. Alternatively, instead of the outer blade holder 47, the cleaning case 105 containing the cleaning brush 104 shown in FIG. 12 is attached to the swing frame 31, and cleaning is performed while running water. In this case, since the safety switch 57 is turned on, the switch knob 4 can be turned on to perform cleaning while rotating the rotary inner blade 15. Since the cleaning brush 104 rotates with the rotating inner blade 15 while partially slipping, the fouling adhered to the blade bottom portion can be reliably removed.

(Drainage structure)
During cleaning, cleaning water enters each part of the head unit 11. In order to effectively discharge the washing water that has entered the gear chamber 28, drainage ports 106 (see FIG. 5) are opened near one side of the bottom wall of the base 30, in detail, around the surface wall on the side where the relay piece 65 is disposed. is doing. Further, the upper surface of the bottom wall of the base 30 is inclined upward from the drain port 106 toward the gear group at the other end, so that all the cleaning water that has entered the gear chamber 28 can be discharged from the drain port 106. I am doing so. The drainage flowing out from the discharge port 106 is guided to the outside of the case through the drainage port 107 provided in the case peripheral wall on the side where the switching knob 5 is disposed, while passing along the upper surface of the second waterproof seal 71. Flows down the case along the gap between the main body case 1 and the main body case 1.

(Charging part structure)
Charging the battery 13 can be performed by either the charging adapter 109 or the charging stand 110 as shown in FIG. For this purpose, as shown in FIG. 13, the bottom case 8 is provided with a pair of two connection terminals 112 and 113 one by one. One connection terminal 112 is insert-fixed when the bottom case 8 is molded, and its lower end is exposed on the lower surface of the bottom case 8. The connection terminals 112 are provided corresponding to the connection terminals of the charging stand 110, and the pitch between the terminals is larger than the connection terminals 113 described later. The other connection terminal 113 is fixed to the lower end of the circuit board 14 (see FIG. 3), and is fitted into the bottom case 8 in a state of projecting into a connecting recess 114 formed in a bottom surface of the bottom case 8. A seal ring is sandwiched between the connection terminal 113 and the inner wall of the bottom case 8. The direct current converted by the charging adapter 109 can be applied to the battery 13 by inserting and engaging the connector 116 led out from the charging adapter 109 into the connecting recess 114. When the charging stand 110 is used, the connector 116 is inserted into and engaged with the connecting recess 117 of the charging stand 110.

  If the battery 13 can be charged by either the charging adapter 109 or the charging stand 110 as described above, for example, when carrying an electric razor during travel, only the charging adapter 109 needs to be carried. Moreover, when using it at home etc., it can charge easily only by inserting an electric razor in the charging stand 110 and loading. The electric razor loaded on the charging stand 110 is held upright while being tilted backward toward the switching knob 5 side (the side of the shaving blade). Therefore, even if the head part is washed with water immediately before charging, the drainage flows down from the switching knob 5 side, so that the drainage liquid can be prevented from flowing down to the front side of the stand.

(Another embodiment)
As a rotary electric shaver, an embodiment in which one rotating inner blade 15 is provided, one rotating inner blade 15 and the center blade 48 in the above embodiment are disposed adjacent to each other is adopted. Can do. The present invention can also be applied to an electric razor in which the inner blade 15 is driven to reciprocate. In that case, a mechanism for converting rotational motion into reciprocating motion is disposed above the output shaft 12a of the motor 12. The transmission mechanism 17 for the inner blade 15 in the above embodiment can be configured by a transmission element other than the gear group.

It is a schematic explanatory drawing which shows the sealing structure of an electric razor. It is a front view of an electric razor. It is an exploded view of a razor unit. It is explanatory drawing which shows a power transmission mechanism. It is a vertical side view of a head unit. It is a vertical side view which shows a swing lock mechanism. It is explanatory drawing which shows the locking mechanism of an outer blade holder, and its related member. It is an internal top view of the locking mechanism of an outer blade holder. It is sectional drawing of a 1st waterproof seal. It is sectional drawing of a 2nd waterproof seal. It is a vertical front view which shows the lower part structure of a main body case. It is sectional drawing of a washing | cleaning case. It is explanatory drawing of a charger.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body case 2 Assembly port 3 Razor unit 10 Chassis unit 11 Head unit 12 Motor 12a Output shaft 13 Battery 14 Circuit board 15 Inner blade 16 Outer blade 17 Transmission mechanism 70 1st waterproof seal 71 2nd waterproof seal

Claims (1)

A main body case (1) having an assembly port (2) open at least at the upper end, and a razor unit (3) installed in the main body case (1) from the assembly port (2) side;
The razor unit (3) is composed of a chassis unit (10) and a head unit (11).
The chassis unit (10) includes a main frame (23) including a motor (12) and a motor accommodating portion (22) capable of accommodating the motor (12).
The head unit (11) includes a base (30), an inverted portal head frame (29) positioned above the base (30), and a swing frame supported by the head frame (29) so as to be able to swing back and forth. (31), an inner blade (15) assembled to the swing frame (31), and an outer blade holder (47) having an outer blade (16) attached and fitted to the swing frame (31). ,
It is configured such that fuzz accumulates in the internal space formed by the swing frame (31) and the outer blade holder (47),
The chassis unit (10) and the head unit (11) are joined together in a vertical structure .
A first waterproof seal (70) is provided between the chassis unit (10) and the head unit (11) to seal the gap between the output shaft (12a) of the motor (12) and the head unit (11). And stop
In the state where the second waterproof seal (71) is provided at the periphery of the joint portion between the chassis unit (10) and the head unit (11), and the razor unit (3) is inserted into the main body case (1) and fixed, A water-washing type electric razor in which the gap between the case (1) and the razor unit (3) is sealed by the peripheral edge of the second waterproof seal (71).

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