JP2008307132A - Electric razor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively cut a beard by restraining unnecessary tilting of a cut face of the beard while making a blade surface smoothly follow the complicated unevenness of the skin surface. <P>SOLUTION: A shaving head 2 having a cutter 18a and a foil 18b is supported in a body case 1 serving also as a grip in such a way as tiltable forward/backward or to the left/right. The shaving head 2 to be tilted forward/backward is energized to return to the neutral position by a pair of front and rear first springs 38, and the shaving head 2 to be tilted to the left/right is energized to return to the neutral position by a second spring 39. The spring load F1 of the first springs 38 is set larger than the spring load F2 of the second spring 39, so that the shaving head 2 is restrained from swinging forward/backward while the whisker cutting face is following the unevenness of the skin surface when whiskers are cut. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electric razor in which a razor head is supported by a main body case so as to be tiltable back and forth and left and right.

  With respect to the present invention, it is known, for example, in Patent Document 1 to support a razor head so that it can tilt and float up and down. There, the main body case supports the floating frame so that it can float up and down, and the razor head is supported so that it can tilt forward and backward with the left and right shafts provided on the left and right floating frames. The left and right floating frames are each urged by a compression coil spring and can be moved up and down at the same time or independently. In addition, in order to return the razor head tilted back and forth to the neutral position, the razor head is urged to return by a pair of diagonally arranged tension springs.

  With respect to the electric razor of the present invention, it is known in Patent Document 2 that a razor head is floated and supported in all directions including front and rear, left and right, up and down, and oblique directions, and returned to a neutral position by a plurality of springs. There, a float frame provided on the upper part of the inner frame supports the float table so that it can float in the front, rear, left and right directions, and a pair of left and right compression coil springs arranged between the float frame and the float table. The float base and the razor head are urged to return to the neutral position. That is, the pair of springs serves as a return spring for returning and biasing the razor head tilted forward and backward and a return spring for returning and biasing the razor head tilted left and right.

JP-A-8-187373 (paragraph number 0011, FIGS. 1 and 3) Japanese Patent Laying-Open No. 2005-218608 (paragraph number 0027, FIG. 1)

  The electric razor that floats and supports the razor head as described above can tilt the whisker cutting surface following the unevenness of the skin surface, but the razor head tilts unnecessarily and is prone to wobbling, making it difficult to cut the beard effectively. Tend. In particular, in the electric razor of Patent Document 1, the razor head is tilted and displaced by the forward / backward tilting motion around the left / right axis and the left / right tilting motion by the vertical movement of the floating frame.

  An object of the present invention is to provide an electric razor that can effectively cut a beard by restricting unnecessary tilting of the razor head even though the blade surface can smoothly follow complex irregularities on the skin surface. It is in.

  In the electric razor of the present invention, a razor head 2 having an inner blade 18a and an outer blade 18b is supported so as to be tiltable in the front-rear direction and the left-right direction with respect to the main body case 1 also serving as a grip. The razor head 2 tilting forward and backward is urged to return to the neutral position by the first spring 38, and the razor head 2 tilting left and right is urged to return to the neutral position by the second spring 39. The spring load F1 of the first spring 38 is set larger than the spring load F2 of the second spring 39.

  The razor head 2 is supported so as to float up and down with respect to the main body case 1, and is pushed up and biased by a third spring 40. The spring load F3 of the third spring 40 is set smaller than the spring load F1 of the first spring 38 and larger than the spring load F2 of the second spring 39.

  The razor head 2 is provided with a lock structure for holding the outer blade holder 17 so that it cannot be separated. The lock structure includes a lock release tool 24 that is exposed on the outer surface of the razor head 2 and a lock spring 27 that holds the lock release tool 24 in a locked posture. The spring load F4 of the lock spring 27 is set larger than the spring load F2 of the second spring 39.

  The spring load F4 of the lock spring 27 is set larger than the spring load F1 of the first spring 38.

  In the present invention, in the electric razor supported by the razor head 2 so as to be tiltable in the front-rear direction and the left-right direction, the razor head 2 tilting back and forth is urged to return to the neutral position by the first spring 38 and tilts left and right. The razor head 2 was urged to return to the neutral position by the second spring 39. In addition, the spring load F1 of the first spring 38 is set to be larger than the spring load F2 of the second spring 39 so that the forward / backward tilting operation can be more strongly suppressed as compared to the left / right tilting operation.

  Therefore, according to the head support structure of the present invention, the whisker cutting surface can be made to follow the unevenness of the skin surface while preventing the razor head 2 from tilting in the front-rear direction. An electric shaver capable of effectively cutting the whiskers can be obtained by restricting unnecessary tilting of the cut surface. Since the razor head 2 is prevented from tilting in the front-rear direction, it is possible to prevent the razor head 2 from being greatly tilted when an external force such as a drop impact is applied and a part of the razor head 2 comes into contact with the main body case 1.

  In the head support structure in which the razor head 2 supported so as to float up and down is pushed up and biased by the third spring 40, the spring load F3 of the third spring 40 is smaller than the spring load F1 of the first spring 38, and the second spring 39 When set larger than the spring load F2, in addition to preventing the razor head 2 from tilting in the front-rear direction as described above, the razor head 2 is submerged when the beard cutting surface is strongly pressed against the skin surface. While regulating, the whisker cutting surface can be tilted to the left and right following the change of the skin surface. Therefore, whisker cutting can be efficiently performed by regulating the wobbling of the razor head 2 at the time of cutting the beard while further making the beard cutting surface follow the unevenness of the skin surface.

  When the spring load F4 of the lock spring 27 is set larger than the spring load F2 of the second spring 39 in the electric razor in which the lock release tool 24 constituting the lock structure for the outer blade holder 17 is urged by the lock spring 27, Even when an electric razor is carried in the bag, even if an external force is applied to the lock release button 24, the entire razor head 2 can be tilted left and right to release the external force. Accordingly, it is possible to prevent the lock release button 24 that has received an external force from being unlocked in the bag, and to prevent the outer blade holder 17 from being lifted off from the head frame 15 and scattering of the internal fluff into the bag. it can.

  When the spring load F4 of the lock spring 27 is set larger than the spring load force F1 of the first spring 38, the lock load 27 is larger than the spring loads F1 to F3 of the springs 38 to 40 for returning the razor head 2 to the neutral position. Since the spring load F4 of the spring 27 is the strongest, no matter which direction the external force is applied to the razor head 2, the razor head 2 is tilted back and forth and left and right, or displaced up and down to release the external force. Can do. Therefore, the unlocking operation of the lock release button 24 can be wiped out, so that the outer blade holder 17 can be prevented from being detached from the head frame 15 and the internal fluff leaking out.

(Embodiment) FIGS. 1 to 10 show an embodiment of a rotary electric shaver to which the present invention is applied. 2 and 3, the electric razor is composed of a main body case 1 that also serves as a grip, a razor head 2 provided on the upper portion thereof, an electrical component unit 3 accommodated in the main body case 1, and the like. On the front surface of the main body case 1, a switch button 4 for starting the motor, a select button 5 for switching the operation state of the motor, and an LED display unit 6 are provided. On the rear surface of the main body case 1, there are provided a sliding blade 7 and a slide knob 8 that pushes up the sliding blade 7 to a use posture. The central axis of the razor head 2 is inclined toward the front side of the case with respect to the central axis of the main body case 1 (see FIG. 3).

  In FIG. 3, the electrical component unit 3 is mounted on the inner case 10, a power supply unit such as the circuit board 11 and the secondary battery 12 disposed in the inner case 10, and the switching operation is performed with the previous buttons 4 and 5. And a plurality of display LEDs. The upper end surface of the inner case 10 is formed with an engagement frame 13 for engaging and mounting a bridge portion 43 described later and a pair of left and right brackets 14 (see FIG. 1).

  4, the razor head 2 includes a head frame 15, a motor holder 16 fastened and fixed to the lower surface of the head frame 15, an outer blade holder 17 that can be attached to and detached from the head frame 15, and the like as outer shells. A pair of front and rear main blades 18 and a center blade 19 are disposed above the upper surface of 15, and both of these inner blades can be driven by the power of a motor 20 accommodated in a motor holder 16. The rotational power of the motor 20 arranged vertically is transmitted to the inner blade 18a of the main blade 18 via a gear transmission mechanism 21 provided on the head frame 15, and simultaneously converted into reciprocating power by a vibrator (not shown). It is transmitted to the inner blade of the blade 19 and the movable blade of the kirizori blade 8. The outer blade 18 b of the main blade 18 is assembled to the outer blade holder 17.

  The outer blade holder 17 is detachably attached to the head frame 15 and is locked so as not to be separated by a lock structure. In FIG. 5, the lock structure has a pair of left and right lock release buttons 24 that are guided and supported by the head frame 15 so as to be able to move in and out. A lock lever 25 that switches to the lock lever 25, a lock hole 26 of the outer blade holder 17 that locks and engages with the lock lever 25, a lock spring 27 that biases the lock release button 24 forward and holds it in a locked position. The lock lever 25 is integrally provided with a pair of front and rear lock claws 28 (see FIG. 1) that engage with the lock hole 26 and an interlocking arm 29 that moves together with the lock release button 24, and the upper and lower middle portions thereof are shafts 30. It is pivotally supported so that it can swing left and right. When the lock release button 24 is pushed against the urging force of the lock spring 27, the engagement state between the lock claw 28 of the lock lever 25 and the lock hole 26 is released, so that the outer blade holder 17 is removed from the head frame 15. Can be removed.

  A head support structure is provided between the razor head 2 and the main body case 1 in order to support the razor head 2 so as to be tiltable in the front-rear and left-right directions and to support the razor head 2 so that it can float up and down. In FIG. 6, the head support structure includes a frame 33 that is fixed to the inner case 10, a head frame 34 that is supported by the frame 33 so as to be relatively swingable, and a first tilt provided between the frame 33 and the head frame 34. The shaft 35, the second tilting shaft 36 provided between the head frame 34 and the razor head 2, the pair of left and right spring receiving frames 37 attached to the frame 33, the head frame 34 and the razor head 2 are returned to the neutral position. The first spring 38 and the second spring 39 are configured to be biased.

  The frame 33 is made of a reverse portal stainless steel plate integrally provided with a pair of left and right support arms 42 that are opposed to each other with the motor holder 16 therebetween and a bridging portion 43 that connects the lower ends of the support arms 42. It consists of press fittings. The support arm 42 is continuous to the left and right side edges of the bridging portion 43, the vertical wall 44 that is bent upward, the reinforcing wall 45 that is continuously bent outward from the upper portion of the vertical wall 44, and the reinforcing wall 45. The connecting wall 46 is bent upward. As shown in FIG. 6, the vertical wall 44 as viewed from the side is stamped and formed in a state of being refracted in the order of upward, obliquely rearward, upward, and obliquely forward, whereby the connecting wall 46 is aligned with the central axis of the razor head 2. Inclined in the same direction at the same angle. The reinforcing wall 45 and the wall surface of the connecting wall 46 are in a relationship orthogonal to each other.

  The bridging portion 43 is formed in a flat plate shape, and quadrangular connection pieces 47 are formed on the front and rear edges thereof. As shown in FIGS. 4 and 10, these connecting pieces 47 are inserted into and engaged with the engaging frame 13 of the inner case 10, and the lower part of the left and right vertical walls 44 is attached to the front case 1 a together with the brackets 14 with screws 48. The frame 33 is integrated with the main body case 1 by fastening to the main body case 1. When the lower part of the left and right vertical walls 44 and the bracket 14 are fastened and fixed to the front case 1a with screws 48 in this manner, the frame 33 and the inner case 10 can be integrated with the main body case 1 with a simpler structure. In FIG. 10, reference numeral 1b represents a rear case.

  As shown in FIGS. 6 to 9, the head frame 34 includes a ring-shaped frame body 51 that surrounds the motor holder 16, a spring receiving block 52 that projects laterally from the left and right sides of the frame body 51, and a spring support. The bearing arm 53 is provided so as to project upward from the side end of the block 52, and the tilting frame 54 provided on the front and rear surfaces of the frame body 51 is integrally formed of a plastic molded product. The frame main body 51 is formed in a drum shape with a flat front portion and a rear portion that match the cross-sectional shape of the motor holder 16 (see FIG. 9), and a circular ring-shaped tilting frame 54 is integrated with these flat portions. Is formed. A circular space surrounded by the tilting frame 54 functions as a floating hole 56 for moving the razor head 2 up and down and tilting it further left and right. Spring receiving projections 57 project from the upper surface and front and rear surfaces of the spring receiving block 52, respectively.

  By joining the bearing arm 53 of the head frame 34 to the inner surface of the connecting wall 46 of the support arm 42 and connecting both 33 and 41 with the first tilting shaft 35, the head frame 34 is supported by the frame 33 so as to tilt forward and backward. Is done. Further, by receiving the second tilting shaft 36 protruding from the front and rear surfaces of the motor holder 16 by the upper inner surface of the tilting frame 54, that is, the upper surface of the floating hole 56, the entire razor head 2 tilts the second tilting shaft 36. It can tilt left and right as a fulcrum, and the entire razor head 2 can float up and down. In addition, the raising / lowering operation | movement of the razor head 2 turns into a diagonal raising / lowering operation | movement along the center axis line.

  As described above, in the state in which the head frame 34 to which the razor head 2 is assembled is assembled to the frame 33 by the first tilting shaft 35, the first tilting shaft 35 and the second tilting shaft 36 have their respective axial centers. The lines are orthogonal to each other. As a result, the razor head 2 is supported so as to be tiltable in the front-rear and left-right directions with respect to the main body case 1 and is supported so as to be able to float in the vertical and diagonal directions.

  The spring receiving frame 37 includes a base portion 60 that is engaged with the reinforcing walls 45 of the left and right support arms 42 and a spring receiving arm 61 that protrudes upward from the front and rear ends of the base portion 60. It consists of a long plastic molded product. As shown in FIG. 1, in a state where the base portion 60 is engaged with the reinforcing wall 45, the front and rear spring receiving arms 61 face the spring receiving projections 57 provided on the front and rear surfaces of the spring receiving block 52. A spring receiving projection 62 similar to the spring receiving projection 57 is also formed on the arm 61 side. Engagement pins 63 project from the front and rear surfaces of each spring receiving arm 61 (see FIG. 6).

  As shown in FIG. 1 and FIG. 7, the base portion 60 having a cross-shaped L-shaped cross section is applied to the inner corner portion between the lower surface of the reinforcing wall 45 and the vertical wall 44 and is press-fitted into the reinforcing wall 45. The spring receiving frame 37 can be integrated with the frame 33. The spring receiving frame 37 in this assembled state is in a relationship orthogonal to the first tilting shaft 35.

  In order to urge the head frame 34 and the razor head 2 supported so as to be able to float and tilt as described above to return to the neutral position, four compression coil-shaped springs are provided between the head frame 34 and the spring receiving frame 37. A first spring 38 is disposed, and two second springs 39 made of a compression coil spring are disposed between the razor head 2 and the head frame 34. Specifically, as shown in FIG. 1, the first is between the spring receiving projections 57 provided before and after the spring receiving block 52 of the head frame 34 and the spring receiving projections 62 provided on the spring receiving arms 61 before and after the spring receiving frame 37. A spring 38 is arranged. Further, a spring receiving projection 67 is provided on the lower surface of a seat wall 66 (see FIG. 7) that projects to the left and right of the upper end of the motor holder 16, and is provided on the upper surface of the spring receiving block 67 of the head frame 34. A second spring 39 is disposed between the second spring receiving projection 57 and the second spring receiving projection 57. The left and right second springs 39 also serve as a third spring 40 that pushes back the razor head 2 that has been pushed down.

  As described above, the frame 33 has the bridge portion 43 engaged with the engagement frame 13 of the inner case 10, and the left and right vertical walls 44 together with the bracket 14 are fastened to the front case 1 a with the screws 48. It is integrated with the case 1. In addition to this fixing structure, the head support structure is more firmly fixed to the main body case 1 by fixing the upper left and right sides of the frame 33 and the front and rear of the pair of left and right spring receiving frames 37 to the main body case 1. So that it can be improved.

  Specifically, as shown in FIG. 7, the shaft end of the first tilting shaft 35 is supported by an engagement hole 70 provided at the joining edge of the front case 1a and the rear case 1b, and is connected to the first tilting shaft 35. The wall 46 and the bearing arm 53 are fixedly held. Further, as shown in FIGS. 1 and 9, the engagement pin 63 provided on the spring receiving arm 61 on the front side of each spring receiving frame 37 is supported by a boss 71 provided on the inner surface of the front case 1a, and each spring receiving frame is further supported. An engagement pin 63 provided on the spring receiving arm 61 on the rear side of 37 is supported by a boss 72 provided on the rear case 1b, and the spring receiving frame 37 and the reinforcing wall 45 are fixedly held. Between the connecting wall 46 and the engagement hole 70, a spacer 73 that is externally fitted to the first tilt shaft 35 is disposed, and the side end of the first tilt shaft 35 is covered with the side cover 1c (FIG. 7). reference).

  In the head support structure configured as described above, the urging force by the first spring 38, the second spring 39, and the third spring 40 is set as follows, so that the blade surface of the razor head 2 has a complex skin surface. The razor head 2 is restricted from unnecessary tilting so that the whiskers can be cut effectively while smoothly following uneven surfaces.

  Specifically, the spring load F1 by the first spring 38 is set to be larger than the spring load F2 of the second spring 39, and the spring load F3 of the third spring 40 is smaller than the spring load F1 of the first spring 38. The spring load of each of the springs 38 to 40 is adjusted so as to satisfy the inequality (F1> F3> F2). The spring load F1 of the first spring 38 in this case means the total spring load of the pair of left and right first springs 38 disposed on the front side or the rear side of the head frame 34, and the spring load F2 of the second spring 39. Means the spring load of the left or right second spring 39. Further, since the third spring 40 serves as the left and right second springs 39, the spring load F3 of the third spring 40 means the total spring load of the pair of left and right second springs 39.

  Further, the spring load F4 of the lock spring 27 described above is set larger than the spring load F1 of the first spring 38, and the springs 27 and 38 to satisfy the inequality (F4> F1> F3> F2). Adjust the spring load of 40. In this case, the spring load F4 of the lock spring 27 means the spring load of either the left or right lock spring 27. Thus, when the spring load F4 of the lock spring 27 is set in relation to the spring loads F1 to F3 of the first to third springs 38 to 40, the electric razor is carried in a state of being accommodated in the bag. In this case, even if an external force acts on the lock release button 24, the entire razor head 2 can be tilted left and right to release the external force. That is, it is possible to prevent the lock release button 24 from being pushed against the spring load of the lock spring 27 and the outer blade holder 17 to be lifted away from the head frame 15 to scatter the internal fluff.

  When not in use, the razor head 2 is held in a neutral position by receiving the spring loads of the first and second first springs 38 facing each other, and the spring loads of the front and rear first springs 38 are balanced. At this time, although each first spring 38 exhibits a set spring load, the tilting moment received by the razor head 2 in the neutral position is zero. When an external force in either direction is applied to the razor head 2 in this state, the balance of the spring load is lost, so that the razor head 2 tilts in the same direction as the external force and is located on the opposite side to the tilt direction. Is compressed and its spring load increases. In addition, the first spring 38 located on the same side as the tilting direction is extended and deformed, and the spring load is reduced. Further, the pair of left and right second springs 39 bend and deform in the same direction as the external force.

  Therefore, although the razor head 2 held in the neutral position starts to tilt with a very small external force in the front-rear direction, the razor head 2 is compressed and deformed as the tilt angle increases beyond the initial tilt range near the neutral position. The spring load of the first spring 38 increases rapidly. Therefore, although the razor head 2 near the neutral position is easily tilted back and forth, the razor head 2 in the tilted state is less likely to wobble due to a spring load of a magnitude balanced with the external force. As described above, the spring load that the razor head 2 receives from the first spring 38 within the initial tilt range in the front-rear direction is smaller than the spring loads of the second spring 39 and the third spring, but tilts beyond the initial tilt range. The spring load that the razor head 2 receives from the first spring 38 is stronger than the spring loads of the second spring 39 and the third spring. When the razor head 2 tilts left and right, the spring load of the second spring 39 also changes in the same manner. Therefore, the razor head 2 near the neutral position is easily tilted left and right, but the razor head 2 in the tilted state is subjected to external force and fishing. It becomes difficult to wobble under the spring load of the matching size. As described above, whisker cutting can be efficiently performed by regulating the wobbling in the front-rear direction of the razor head 2 at the time of cutting the beard while making the whisker cutting surface follow the unevenness of the skin surface.

  FIG. 11 shows another embodiment of the head support structure according to the present invention. Here, out of the four first springs 38 arranged between the head frame 34 and the spring receiving frame 37, the left and right first springs 38 arranged on the front side of the head frame 34 are omitted, and the spring receiving frame 37 is omitted. The razor head 2 in a state of being held at the neutral position is provided rearward with the first tilting shaft 35 as a center. Restricted tilting. In other words, the razor head 2 in this embodiment is limited in its forward / backward tilt range between the neutral position and the forward tilt limit position. 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.

  As described above, the electric razor provided with the restricting projection 77 to restrict the rearward tilt of the razor head 2 is limited in the range of the forward / backward tilt between the neutral position and the forward tilt limit. Thus, the razor head 2 tilting back and forth in the present invention includes a case where the range of tilting of the razor head 2 is limited between the neutral position and the tilt limit position of either one of the front and rear. To do. Incidentally, since the razor head 2 in this embodiment is not affected by the first spring 38 on the front side, it receives the spring load of the first spring 38 on the rear side in the neutral position. Therefore, the razor head 2 is urged to return by the spring load of the first spring 38 at the same time as it begins to tilt backward. At this time, the spring load of the first spring 38 is larger than the spring loads of the second spring 39 and the third spring. Therefore, the wobbling of the razor head 2 can be prevented from the initial tilting stage.

  FIG. 12 shows still another embodiment of the head support structure. The head support structure includes a U-shaped frame 81 fixed to the main body case 1 and a pair of left and right first springs 38 and second springs 39 that urge the razor head 2 back to the neutral position. The first spring 38 is formed by a leaf spring, the upper end of which is fixed to the head frame 15, and the slide piece 90 that is formed to protrude at the lower end is only slid up and down by the slide groove 83 formed in the vertical wall 82 of the frame 81. The guide is supported as possible. The second spring 39 is formed of the same compression coil spring as that of the above-described embodiment, and is disposed between the spring seat 84 and the head frame 15 that are formed to protrude from the upper end of the vertical wall 82. The motor 20 is mounted on the bottom wall of the frame 81, and its rotational power can be transmitted to the power transmission structure inside the head frame via the flexible shaft 92. When the razor head 2 tilts back and forth or in the left-right direction, the flexible shaft 92 transmits rotational power while being deformed following the tilting operation of the razor head 2.

  When the razor head 2 tilts forward or backward from the neutral position, the first spring 38 formed of a leaf spring is deflected back and forth to exhibit a spring load. In this case, in a state where the razor head 2 is tilted forward or backward from the neutral position, the first spring 38 exerts a large spring load and can prevent the razor head 2 from wobbling. That is, in the razor head 2 in this embodiment, the spring load of the first spring 38 in the initial tilting stage is made stronger than the spring loads of the second spring 39 and the third spring, similarly to the head support structure described in FIG. Thus, the wobbling of the razor head 2 can be prevented from the initial tilting stage.

  In the above embodiment, the second spring 39 also serves as the third spring 40, but a dedicated third spring 40 can be provided separately. Moreover, although the case where the inner blade 18a of the main blade 18 was comprised with the rotary type inner blade was demonstrated, the main blade may be a cutting blade provided with a reciprocating inner blade. The motor 20 does not need to be placed vertically and can be placed horizontally. The central axis P2 of the razor head 2 need not be inclined with respect to the central axis P1 of the main body case 1.

It is a vertical side view of an electric razor. It is a front view of an electric razor. It is a partially broken side view of an electric razor. It is a partially broken front view of the electric razor principal part. It is sectional drawing which shows the lock structure of an outer blade holder. It is a disassembled side view of a head support structure. It is a vertical front view of a head support structure. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is CC sectional view taken on the line in FIG. It is a vertical side view which shows another Example of a head support structure. It is a vertical side view which shows another Example of a head support structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body case 2 Razor head 17 Outer blade holder 18a Inner blade 18b Outer blade 24 Lock release tool 27 Lock spring 35 First tilt shaft 36 Second tilt shaft 38 First spring 39 Second spring 40 Third spring

Claims (4)

A razor head (2) having an inner blade (18a) and an outer blade (18b) is supported so as to be tiltable in the front-rear direction and the left-right direction with respect to the main body case (1) also serving as a grip,
The razor head (2) tilting back and forth is urged to return to the neutral position by the first spring (38), and the razor head (2) tilting left and right is urged to return to the neutral position by the second spring (39),
An electric shaver characterized in that the spring load (F1) of the first spring (38) is set larger than the spring load (F2) of the second spring (39). The razor head (2) is supported so as to be able to float up and down with respect to the main body case (1), and is pushed up and biased by a third spring (40).
The spring load (F3) of the third spring (40) is set smaller than the spring load (F1) of the first spring (38) and larger than the spring load (F2) of the second spring (39). The described electric razor. The razor head (2) is provided with a lock structure for holding the outer blade holder (17) in an inseparable manner,
The lock structure includes a lock release tool (24) provided in an exposed state on the outer surface of the razor head (2), and a lock spring (27) that holds the lock release tool (24) in a locked posture.
The electric shaver according to claim 1 or 2, wherein the spring load (F4) of the lock spring (27) is set larger than the spring load (F2) of the second spring (39).   The electric shaver according to claim 1, 2 or 3, wherein the spring load (F4) of the lock spring (27) is set larger than the spring load (F1) of the first spring (38).

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