JP4575517B2 - Electric razor - Google Patents

Description

  The present invention relates to an electric razor having a motor for driving a blade.

  As this type of electric shaver, there is, for example, Patent Document 1. There, a motor, a power transmission mechanism, an inner blade, an outer blade, and the like are incorporated on the razor head side, and the entire razor head is supported so as to be floatable in all directions with respect to the main body. The main body portion accommodates electrical components such as a circuit board and a secondary battery constituting the control circuit, and a seal between the main body portion and the razor head is sealed with a molded packing to waterproof them. . The motor is housed in a cylindrical motor holder, and is waterproofed by sealing between the cover that closes the opening and the output shaft with a packing. The cover and the motor holder are integrated by screwing flanges to be joined to each other.

  On the lower surface of the motor holder, a conductor opening is opened facing the inside of the sealing surface of the molded packing, and the motor and electrical components in the main body are connected by a power supply lead passing through the conductor opening. In the electric razor of Patent Document 2, a razor head and a main body are connected by a rubber tube, and a power supply lead is inserted through the inside thereof. In either case, the entire razor can be washed with water.

Japanese Patent Laying-Open No. 2004-209116 (paragraph number 0050, FIG. 9) JP 2004-16519 A (paragraph number 0027, FIG. 8)

  An object of the present invention is to provide an electric razor in which a sealing structure of a power supply lead for a motor is simplified.

Electric shaver of the present invention includes a main body portion which also serves as a grip, and a head portion which is disposed above the body portion, the head portion includes a blade reciprocating type or rotary-driven, the blades A motor for driving and a housing for housing the motor are included. The motor of the power supply lead, the are derived from lead hole formed in the housing, between the lead hole and the power supply lead of the housing is sealed watertight form in packing. Wherein the housing compartment provided in the body portion, the electrical component and a circuit board and a battery for control is housed, the partition wall of the housing compartment is formed lead hole. Between the lead hole and the power supply lead of the partition wall is sealed in a watertight form in a separate packing and sealed packing between the lead hole and the power supply lead of the housing.

Further, the head portion, said being supported by a pair of support arms provided in the upper portion of the main body portion, the power feeding lead extending from the lead hole of the housing, and in said support arm, said partition wall It is connected to an electrical component in the accommodation compartment through a lead hole.

According to the above configuration, the sealing structure can be simplified as compared with the case where all of the wiring paths of the power feed leads from the head portion to the main body portion are sealed. Since there is no restriction on the wiring path between the housing and the partition wall , even when a partial structure is added or changed, it can be flexibly handled.

Further, the head portion, said being supported by a pair of support arms provided in the upper portion of the main body portion, said housing formed feed lead derived from the lead hole, and in said support arm, said compartment By being connected to an electrical component in the housing compartment through a lead hole in the wall, the feeding lead can be prevented from being exposed to the outer surface of the electric razor and can be protected.

It is a disassembled perspective view which shows the periphery structure of a motor. It is a front view of an electric razor. It is a vertical front view of an electric razor. It is a vertical side view of an electric razor. It is a vertical front view of a head part. It is a cross-sectional top view of a head part. It is a disassembled perspective view of a main-body part. It is a rear view of an electric razor. It is a cross-sectional plan view of a main-body part. It is a vertical side view which shows the wiring structure of a feed lead. It is a vertical side view which shows a switch structure. It is sectional drawing which shows the structure of an inner blade and an outer blade. It is a vertical front view which shows another embodiment of a head part. It is the DD sectional view taken on the line in FIG.

(Example) FIGS. 1-12 shows the Example of the electric shaver based on this invention. 2 to 4, the electric razor is float-supported by an egg-shaped main body 1 that also serves as a grip, a pair of left and right support arms 2 projecting upward from the main body 1, and a support arm 2. And a head portion 3. The support arm 2 is slightly curved rearward. As a result, the head portion 3 is slightly tilted forward with respect to the central axis P of the main body portion 1 (see FIG. 4).

  In FIG. 7, the main body 1 includes a front case 1a in which a support arm 2 is integrally formed, a rear case 1b that covers the rear surface of the front case 1a, a decorative cover 1c that covers the rear surface of the rear case 1b, and a front case. The decorative panel 1d is mounted on the front surface of 1a. Most parts of each support arm 2 are formed integrally with the front case 1a, but the lower rear surface of each support arm 2 is formed integrally with the rear case 1b. This is because, as will be described later, a guide hole 75 for supporting the support leg 25 of the head portion 3 is formed integrally with the support arm 2 to improve the structural strength of the guide hole 75. The lower portions of the left and right support arms 2 are continuously U-shaped and smoothly merged with the upper portions of the front and rear cases 1a and 1b.

  The front case 1a and the rear case 1b are joined via a packing 4 fitted in the rear case 1b. A circuit board 6 and two secondary batteries (batteries) 7 are housed in a watertight housing section 5 formed between the two 1a and 1b. The two secondary batteries 7 are arranged so as to be vertically adjacent to each other along the central axis P of the main body 1. The inside of the support arm 2 is hollow, and this hollow portion is adjacent to the previous storage compartment 5 via a compartment wall (peripheral wall) 8.

  A push button type switch button 11 is provided on the upper curved surface of the decorative panel 1d. By pressing the switch button 11, the switch 12 mounted on the circuit board 6 can be turned on / off to start or stop a motor 22 described later. As described above, when the switch button 11 is arranged on the upper curved surface of the decorative panel 1d, the sinking direction of the switch button 11 matches the bending direction of the thumb when the push-in operation is performed. Easy switching operation with natural movement.

  As described above, when the switch button 11 is arranged on the upper curved surface of the decorative panel 1d, the sinking direction Q of the switch button 11 and the switching direction R of the switch 12 do not match as shown in FIG. May not be turned on and off properly. This is because the sinking direction Q of the switch button 11 is greatly inclined downward toward the rear of the case. In order to avoid such inconvenience, the circuit board 6 is inclined so that the upper end of the circuit board 6 is inclined rearward of the case, and the switching direction R of the switch 12 is inclined to approach the sinking direction Q of the switch button 11. Further, the push button type switch button 11 is tilted and displaced so as to swing, so that the switch 12 can be appropriately turned on and off.

  As shown in FIG. 11, the switch button 11 is integrally provided with a disk-shaped operation portion 11a, an operation shaft 11b projecting from the inner surface of the operation portion 11a, and a flange 11c protruding from the periphery of the operation portion 11a. In addition, a restriction projection 11d is formed at the center of the upper and lower portions of the flange 11c. A packing 15 is attached to the front case 1 a facing the switch button 11, and the entire switch button 11 is pushed and biased by receiving the protruding end of the operating shaft 11 b with the packing 15.

  The switch button 11 in the normal state is received by the inner peripheral edge of the switch window 9 whose flange 11c is opened in the decorative panel 1d, and the operation portion 11a is exposed to the front surface of the panel through the switch window 9. On the top and bottom of the outer surface of the front case 1a facing the flange 11c, a protrusion 16 for receiving the flange 11c and a rib 17 for guiding the previous restricting protrusion 11d are formed.

  When the switch button 11 is pushed in against the elastic force of the packing 15, the upper part of the flange 11 c comes into contact with the protrusion 16 in advance. Thereafter, the flange 11c sinks while being tilted in the counterclockwise direction while being received by the protrusion 16. Therefore, in a state where the switch 12 is pushed and operated via the packing 15, the operation shaft 11b faces the plate surface of the circuit board 8, so that the switch 12 can be appropriately turned on / off. When the pushing operation force is released, the switch button 11 returns to the standby posture by the elastic force of the packing 15. At this time, the displacement of the switch button 11 can be restricted by guiding the restriction protrusion 11d with the rib 17. In FIG. 4, reference numeral 13 denotes a first indicator lamp that lights up when the switch button 11 is turned on, and reference numeral 14 denotes a second indicator lamp that lights up during charging.

  3 to 6, the head unit 3 houses a head case 18, an inner blade 19 incorporated in the head case 18, an outer blade 20 and an outer blade holder 21, an inner blade driving motor 22, and a motor 22. A housing 23 and a gear mechanism for transmitting motor power to the inner blade 19 are included.

  The head case 18 is configured by joining a semi-cylindrical front half 18a and a rear half 18b, which are divided into front and rear, in a cover-to-cover shape (see FIG. 4). A mounting seat 24 for externally mounting the outer blade holder 21 is bulged on the upper surface of the head case 18, and a pair of left and right support legs 25 project from both sides of the lower surface. The support leg 25 is formed in a hollow cylindrical shape, and is open on the inner peripheral surface of the case. On both the left and right sides of the front half 18a, ring-shaped side walls 26 for receiving a lock release button 68, which will be described later, are integrally formed.

  The inner blade 19 is a rotary blade, and shaft portions at both ends thereof are rotatably supported by an inner blade support base 29 and a bearing piece 30. The outer blade 20 is formed of a mesh blade and is supported in an arch shape by an outer blade holder 21. The motor 22 has a flat front and rear circumferential surface, has an output shaft 31 on one side, and a power supply lead 32 is led out from the other side.

  In order to make the head portion 3 washable, the motor 22 is accommodated in the housing 23 and sealed in a watertight manner. In FIG. 1, the housing 23 sandwiches a first case 35 having a bottomed cylindrical shape that is divided in the left-right direction (axial direction), a second case 36 that closes the opening of the first case 35, and the opposing peripheral surfaces of both. The clip 37 is configured. The motor 22 is incorporated in the first case 35 with its output shaft 31 protruding from the side end wall, and the gap between the output shaft 31 and the opening of the first case 35 is sealed with a second packing 39 (FIG. 5). And FIG. 6). A joint portion between the first case 35 and the cover 35 is sealed with a first packing 38 attached to the inner surface of the cover 35. Both packings 38 and 39 are formed packing.

  The first case 35 has a drum-shaped cross section that matches the outer shape of the motor 22, and has a pair of upper and lower guide ribs (guide bodies) 42 on each of the front and rear flat surfaces and an engagement protrusion 43 for the clip 37. And formed. On the upper surface of the first case 35 on the output shaft side, an inner blade bracket 44 that supports the inner blade support base 29 is integrally formed. The first case 35 is dimensioned to have a left and right length that can accommodate the entire motor 22 and the second packing 39.

  The second case 36 is formed in a shallow dish shape, and an inner blade bracket 45 similar to the inner blade bracket 44 is integrally formed on the upper surface thereof. The inner blade support base 29 is placed on the inner blade brackets 44 and 45 in a bridging manner, and the bottom frame portion of the inner blade support base 29 is fastened with screws 46 as shown in FIG. The base 29 can be integrated with the housing 23.

  As shown in FIGS. 6 and 10, the previous power supply lead 32 is led out of the housing 23 through a pair of upper and lower lead holes 50 opened in the side end wall of the second case 36. A space between the power supply lead 32 and the lead hole 50 is sealed in a watertight manner with a packing 51 attached to the lead hole 50. In the vicinity of the lead hole 50, a lateral wall is projected, and a holding groove (holding tool) 52 is cut out above and below the wall. By inserting the power supply lead 32 led out from the lead hole 50 into the holding groove 52, the power supply lead 32 can be captured and fixed in a non-movable manner. The packing 51 is formed in a cylindrical shape having both ends open. After the feeding lead 32 is inserted into the lead hole 50 from the inside of the second case 36, the packing 51 is inserted into the feeding lead 32, and the packing 51 is further inserted into the lead hole. 50 and press-fit into the second case 36.

  The clip 37 is made of a press-molded product made of a stainless steel plate material, and integrally includes a pair of front and rear elastic holding arms 54 and an end wall 55 that connects the side ends of the elastic holding arms 54 as shown in FIG. . An inclined wall 56 that facilitates the insertion operation into the first case 35 is bent outwardly at the protruding ends of the pair of elastic clamping arms 54, and the previous engaging protrusion 43 is adjacent to the bent base end. An engagement window 57 for engaging with is opened. The engagement protrusion 43 and the engagement window 57 constitute engagement means for holding and fixing the clip 37 to the first case 35. The facing interval in the vicinity of the engagement window 57 of the elastic clamping arm 54 in the free state is formed to be smaller than the front-rear facing interval of the flat surface of the housing 23. Therefore, in a state where the clip 37 is inserted and loaded into the housing 23 as will be described later, the pair of elastic clamping arms 54 are expanded so that the first and second cases 35 and 36 can be clamped at the same time. 23 can be firmly fixed.

  An adjustment wall 58 is formed between the end wall 55 formed in a square frame shape and the elastic clamping arm 54 so as to be inclined downward from the proximal end of the elastic clamping arm 54 toward the end wall 55. The adjustment wall 58 is provided in order to absorb the molding error of the first case 35 and the second case 36, and to keep the cases 35 and 36 in close contact with each other. The variation in the left-right spacing (spacing in the axial direction) can be absorbed by the elastic deformation of the adjustment wall 58. The vertical width of the elastic clamping arm 54 is slightly smaller than the vertical spacing between the pair of guide ribs 42.

  As described above, after the motor 22 is loaded in the first case 35 and the second case 36 is put on the first case 35, the clip 37 is inserted and loaded from the second case 36 side toward the first case 35. By doing so, the engagement protrusion 43 and the engagement window 57 are engaged, and the first case 35 and the second case 36 are engaged and fixed so as not to be separated, and the motor 22 is clamped and fixed by both cases 35 and 36. it can. The adjustment wall 58 in this state is in an elastically deformed state. Therefore, the second case 36 can always be tightly bonded to the first case 35. The guide rib 42 and the engaging protrusion 43 in a state where both cases 35 and 36 are joined cooperate to regulate the position of the elastic clamping arm 54. Therefore, the elastic force due to the adjustment wall 58 is also applied, and the clip 37 receiving the external force does not come off from the first case 35.

  As described above, the housing 23 in which the motor 22 is accommodated is sandwiched between the front half 18a and the rear half 18b, engages the joining edges of the both halves 18a and 18b, and further, the left and right sides of the upper joining surface are paired with each other. The housing 23 can be integrated with the head case 18 by fastening with the screws 60. In this assembled state, since the joint surface fastened with the screw 60 fits between the pair of inner blade brackets 44 and 45, the movement of the housing 23 in the left-right direction can be restricted.

  In FIG. 5, the gear mechanism includes a driving gear 61 fixed to the output shaft 31, a final gear 62 fixed to the inner blade 19, and three intermediate gears 63, 64. 65. The three intermediate gears 63 to 65 are rotatably supported by a side surface of the inner blade bracket 44 of the first case 35 and a gear cover 66 that covers the side surface of the inner blade bracket 44.

  In order to lock and hold the outer blade holder 21 mounted on the mounting seat 24 of the head case 18, an unlock button 68 is arranged on the inner surface of the side wall 26 of the head case 18 and is urged to be locked by a compression coil spring 69. Yes. As shown in FIG. 5, a lock claw 70 is integrally formed on the inner upper surface of the lock release button 68, and the lock claw 70 is engaged with a lock recess 71 provided on the inner surface of the side wall of the outer blade holder 21. The outer blade holder 21 can be locked and held. When the lock release button 68 is pushed in against the urging force of the spring 69, the engagement state between the lock recess 71 and the lock claw 70 is released, so that the outer blade holder 21 can be removed from the mounting seat 24.

  The head portion 3 having the above-described configuration is supported by a pair of support arms 2 so as to be tiltable in the left-right direction. Specifically, as shown in FIG. 5, the support legs 25 protruding from the left and right sides of the lower surface of the head case 18 are guided and supported by the guide holes 75 provided in the left and right support arms 2 so as to be slidable up and down. The entire head portion 3 is pushed up and biased by the compression coil spring 76. The lower end side of the spring 76 is received by the upper peripheral wall of the guide hole 75. A stopper claw 78 is formed near the lower end of the support leg 25, and the stopper claw 78 is received by the lower peripheral wall of the guide hole 75, so that the head portion 3 can be held without being detached.

  As described above, when the head unit 3 is floated and supported by the pair of support arms 2, the head unit 3 tilts left and right or floats up and down simultaneously, so that the head unit 3 can tilt following the change in the skin surface, The beard cutting can be performed more appropriately. Does not hurt the skin. In addition, since the guide holes 75 that support the support legs 25 of the head portion 3 are formed integrally with the left and right support arms 2, the front-rear direction external force acting on the head portion 3 can be reliably received by the support arms 2. Incidentally, when all the parts of each support arm 2 are divided into the front and rear, the front and rear cases 1a and 1b open back and forth at the joint part of the support arm 2 when an external force in the front and rear direction acts on the head portion 3. There is a possibility that the head unit 3 rattles during use or a smooth floating operation cannot be performed.

  The power supply lead 32 led out from the housing 23 is wired to the main body 1 using the internal space of one spring 76. Actually, the feeding lead 32 is wired using the inner space of the hollow cylindrical support leg 25, and the housing section 5 is connected through the lead hole 81 opened in the partition wall 8 of the housing section 5 as shown in FIG. 3. Introduce into. A space between the power supply lead 32 and the lead hole 81 is sealed in a watertight manner with a packing 82 attached to the lead hole 81.

  In order to more effectively perform whisker cutting during use, the inner blade 19 and the outer blade 20 are configured as shown in FIG. 12, and the peripheral speed of the inner blade 19 is made higher than that of a conventional rotary blade. . The inner blade 19 is formed by inserting and fixing a large number of blades 19a arranged in a spiral shape on a round bar-shaped blade body 19b, and the rake angle θ of the blade 19a is set to 10 degrees. Further, the group of cutting blades 20a constituting the outer blade 20 are formed in the shape of an outer dent shell by electroforming, but the inclination angle α of the blade tip 20b on the upper rotation side is set to 45 degrees, and the blade back surface 20c of the cutting blade 20a. Is set to 60 degrees, and the former inclination angle α is set to be 10 degrees or more smaller than the latter inclination angle β. As described above, in order to make the angles α and β of the blade tip 20b and the blade back surface 20c different from each other, the cylinder-type electroforming mother mold immersed in the electroforming tank is electroformed while rotating at high speed in the same direction. Incidentally, the rake angle θ of the blade in the conventional rotary blade was 5 degrees. Further, the inclination angle α of the cutting edge of the conventional cutting edge of the outer blade was 65 degrees, and the inclination angle β of the back face of the blade was 65 degrees.

  Regarding the peripheral speed of the inner blade 19, the peripheral side degree of the blade tip in the conventional rotary blade was 1.0 to 1.27 m / sec. In this embodiment, the diameter dimension of the rotation locus of the blade tip is When it was 8 mm, the driving rotational speed was 3500 rpm, and the peripheral speed was 1.47 m / sec. The peripheral speed of the blade tip can be selected within the range of 1.3 to 1.5 m / sec, and more preferably 1.4 to 1.5 m / sec. When the peripheral speed of the blade tip is less than 1.3 m / sec, it takes time to cut the whiskers. When the peripheral speed of the blade tip exceeds 1.5 m / sec, the surface temperature of the outer blade 20 is 20. Since it exceeds ℃, it does not satisfy the provisions of the law.

  When the inner blade 19 and the outer blade 20 have the above-described blade structure, and the peripheral speed of the blade 19a is increased to 1.47 m / sec, the whisker can be cut quickly by the amount of opportunity for cutting the whiskers. Further, in the conventional rotary shaver, it is necessary to shave by moving the razor head in the direction opposite to the rotation direction of the inner blade, for example, upward from the jaw side toward the lips, but the peripheral speed of the blade 19a is increased. As a result, when cutting the head unit 3 in the direction opposite to the direction of rotation of the inner blade 19 as well as when moving the head unit 3 in the same direction as the direction of rotation of the inner blade 19, the beard cutting is performed accurately. be able to.

  As described above, by making the whiskers cut in the reciprocating direction, the whiskers can be cut more effectively and the usability of the electric razor can be improved. Further, in this embodiment, the head part 3 is slightly tilted forward with respect to the central axis P of the main body part 1, so that the main body part 1 is gripped in a state where it is flipped back and forth, and a recessed part such as under the neck or chin. Can be shaved from the bottom to the top, and the beard cutting can be performed more effectively than the conventional rotary shaver.

  13 and 14 show another embodiment of the present invention. In this case, the housing 23 is divided into a rectangular box-shaped first case 35 divided in the front-rear direction (divided in the axial direction of the housing 23) and a rectangular lid-shaped second case 36 that closes the opening surface of the first case 35. In this configuration, both of these 35 and 36 are engaged and fixed by a clip 37 so as not to be separated. The housing 23 accommodates the motor 22 and a vibrator 85 that converts the rotational power of the motor 22 into reciprocating power. Therefore, unlike the previous embodiment, the second packing 39 seals between the drive shaft 86 provided on the upper surface of the vibrator 85 and the upper wall of the first case 35. The power supply lead 32 is led out from a lead hole 50 provided in the lower wall of the first case 35, and the space between the lead hole 50 and the power supply lead 32 is sealed with a packing 51.

  The power of the motor 22 is transmitted to the vibrator 85 through an eccentric cam 87 fixed to the output shaft 31, and the reciprocating power of the vibrator 85 is transmitted to the inner blade 19 through the drive shaft 86. The inner blade 19 is composed of a slit blade, and is supported by a plastic inner blade support base 29 to maintain an inverted U-shaped bending posture. The clip 37 attached to the housing 23 absorbs variations in the dimensions of the cases 35 and 36 in the front-rear direction (axial direction) by elastically deforming the adjusting wall 58. Since the others are substantially the same as the previous embodiment, the same reference numerals are assigned to the same members and the description thereof is omitted. As can be understood from this embodiment, the housing 23 can be divided in the front-rear direction. Furthermore, power transmission components other than the motor 22 can be accommodated in the housing 23. If necessary, the housing 23 in this embodiment can be divided in the left-right direction or diagonally as in the previous embodiment.

  In the above embodiment, the case where the motor 22 is horizontally disposed has been described. However, the present invention can also be applied to the case where the motor 22 is vertically disposed. Of course, the inner blade 19 does not need to be a rotary blade, and may be a reciprocating inner blade 19. The present invention can also be applied to an electric razor in which the inner blade 19 is driven to rotate about the vertical axis. The housing 23 can be composed of first and second cases 35 and 36 each formed in a bottomed cylindrical shape.

  Three or more elastic clamping arms 54 of the clip 37 can be provided. If necessary, the clip 37 may be configured by inserting and fixing an elastic clamping arm 54 formed of a metal plate material to an end wall 55 made of plastic. Of course, the clip 37 may be formed of a plastic molded product. Only one guide rib 42 of the first case 35 can be provided, and if necessary, three or more guide ribs 42 can be provided. The guide body 42 can be formed in a groove shape, and a protrusion or a wall that fits into the guide body 37 can be formed on the clip 37 side.

  The engaging means is not limited to the embodiment as long as it has a structure capable of engaging with each other. For example, the engaging protrusions 43 may be integrally formed on each of the opposing surfaces of the guide rib 42. The lead hole 81 only needs to be provided on the peripheral wall of the storage compartment 5, and can be formed on the rear surface of the rear case 1b, for example. The holder 52 does not need to have a groove structure, and can be constituted by a plurality of pins arranged close to each other, for example.

DESCRIPTION OF SYMBOLS 1 Main-body part 2 Support arm 3 Head part 5 Accommodating section 6 Circuit board 7 Battery 18 Head case 19 Inner blade 20 Outer blade 22 Motor 23 Housing 29 Inner blade support stand 31 Motor output shaft 32 Feed lead 35 First case 36 Second Case 37 Clip 38 First packing 39 Second packing 42 Guide rib 43 Engagement protrusions 44 and 45 Inner blade bracket 50 Lead hole 51 Packing 52 Holder 54 Elastic clip clamping arm 55 Clip end wall 57 Engagement window 58 Adjustment wall 76 Spring 81 Lead hole

Claims (1)

It has a main body that also serves as a grip, and a head that is arranged above the main body.
The head portion includes a reciprocating drive type or rotary drive type blade, a motor that drives the blade, and a housing that houses the motor.
The power feed lead of the motor is led out from a lead hole formed in the housing;
The space between the lead hole of the housing and the power supply lead is sealed in a watertight manner with packing,
The housing section provided in the main body contains electrical components including a control circuit board and a battery,
A lead hole is formed in the partition wall of the storage compartment,
Between the lead hole of the partition wall and the power supply lead, the seal between the lead hole of the housing and the power supply lead is sealed in a watertight manner with a packing different from the packing,
The head part is supported by a pair of support arms provided on the upper part of the main body part,
The housing of the power supply lead extending from the lead hole, and in said support arm, through the lead hole of the partition wall, characterized in that it is connected to the electrical component in said receiving compartment Electric razor.

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