JP2831245B2 - Electric razor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating electric shaver provided with an outer blade capable of swinging.

[0002]

2. Description of the Related Art This type of electric razor is equipped with a plurality of inner blades arranged in parallel on a reciprocating member reciprocated by a reciprocating drive mechanism provided on a main body casing.
An outer blade holder in which a plurality of outer blades facing the inner blade are arranged and mounted is arranged, and both ends in the longitudinal direction of the outer blade holder are swung by a pair of fixing members provided at intervals in the main body casing. As a result, the outer blade holder swings and swings at the time of shaving, so that a plurality of outer blades simultaneously come into contact with the skin to perform shaving, which is advantageous in shaving efficiency.

Conventionally, in this type of electric razor, in order to support the outer blade holder so that the outer blade holder can be swiveled and pivoted, elastic members are respectively attached to a pair of fixed members, and transparent members are provided at both ends of the outer blade holder. A hole is formed, and a screw is screwed into an elastic member attached to the fixing member from both sides (inside) of the outer blade holder from opposite sides (inside) of the fixing member through through holes at the both ends. There is one that adopts a configuration in which both ends are supported by a fixed member so as to be swingable.

[0004] Here, the screw is for swinging the end of the outer blade holder to a pair of fixing members and supporting the outer blade holder so as not to drop from the fixing member.
The outer blade holder can swing and rotate about the screw as the rotation center. The elastic member applies elastic force toward the center of the outer blade holder in the direction of a line connecting the pair of fixing members to the end of the outer blade holder and presses the end from the outside. The blade holder can be supported between the pair of fixing members without play.

That is, in order to smoothly insert the outer cutter holder into the gap between the pair of fixing members, it is necessary to make the length of the outer cutter holder smaller than the gap between the pair of fixing members. However, when the outer blade holder is inserted between the pair of fixing members, a gap is generated between both ends of the outer blade holder and the pair of fixing members. For this reason, the outer blade holder drops from the fixing member, and the outer blade holder is rattled in the length direction, which hinders the shaving operation. Therefore, the outer blade holder is prevented from falling using screws and is supported, and the outer blade holder is supported without play using an elastic member.

[0006]

However, in such a configuration for supporting the conventional outer blade holder, the outer blade holder is supported between the pair of fixing members so as to be swingable and play without any play. For this purpose, screws and elastic members are required, so that the number of parts is large. Further, since the space inside the outer cutter holder is very narrow, it is very difficult to tighten a screw from the inside of the outer cutter holder through a through hole at an end in order to support the outer cutter holder on the fixing member.

The present invention has been made in view of the above circumstances, and supports a holder between a pair of fixing members so as to be able to swing and rotate without a small number of parts and by an easy operation. With the aim of providing a shaver that can be.

[0008]

SUMMARY OF THE INVENTION An electric razor according to the present invention comprises an electric shaver having an outer blade and an inner blade which reciprocates while contacting the inner surface of the outer blade to perform shaving. A pair of fixing members disposed opposite to each other, a holder disposed between the pair of fixing members and having at least the outer blade attached thereto and having a supported portion at a portion facing the fixing member, and the pair of fixing members A support member provided between the member and the holder, the support member being provided on each of the pair of fixing members, and having a support portion that engages with a supported portion of the holder and rotatably supports the holder. An elastic force is applied to at least one of the support portion of the support member and the supported portion of the holder toward the other side, and the support portion of the support member and the supported portion of the holder are engaged. engagement to Engagement length in the direction along the line connecting the pair of fixing members in minute, the pair of fixing members in the gap formed between the surface of the holder opposite to the surface with the surface of the fixing member length in the direction along the line connecting
It is characterized by being larger.

[0009]

The holder is inserted between the pair of fixing members. Then, at least one of the support portion of the support member and the supported portion of the holder is displaced against the elastic force, and when the entire holder is disposed between the pair of fixed members, the displaced portion is restored by the elastic force. Then, the support portion of the support member and the supported portion of the holder engage with each other. Thereby, both ends of the holder are swingably supported by the support portions of the pair of support members, and the holder is provided so as to be rotatable about a rotation center axis along a direction connecting the pair of fixed members. .

The length of the engaging portion where the supporting portion of the supporting member and the supported portion of the holder are engaged in the direction along the line connecting the pair of fixing members is opposed to the surface of the fixing member. in the direction along the line connecting the pair of fixing members in the gap between the surface of the holder is set long Saya Ri large. Therefore, even when the holder is displaced to the one fixed member side and the surface of the holder comes into contact with the surface of one fixed member, the distance between the surface of the holder and the surface of the other fixed member is enlarged. The holder of the other support member does not come off from the supported portion of the holder, thereby preventing the holder from dropping and reliably supporting the holder.

Further, at least one of the supporting portion of the supporting member and the supported portion of the holder is engaged with each other by utilizing the elastic force applied toward the other side. For this reason, the holder is prevented from being displaced along the direction of the line connecting the pair of fixing members.

Therefore, the supporting portion of the pair of supporting members and the supported portion of the holder can rotate the holder in place of the conventional screw and support the holder so as not to come off from the fixing member. Instead of the elastic member, both ends of the holder are pressed by an elastic force to support the holder between the pair of fixing members without play.

Accordingly, the holder can be swung between the pair of fixing members by a small number of parts and by an easy operation, and can be supported without rattling.

In addition, when the holder is inserted between the pair of fixing members, at least one of the supporting portion of the supporting member and the supported portion of the holder is displaced against the elastic force, and the entire holder is displaced by the pair of fixing members. When it is located between them, the displaced portion returns to its original position by the elastic force, and the support portion of the support member and the supported portion of the holder engage with each other. Therefore, the operation of supporting the holder on the fixing member by the support member can be easily performed without being restricted by the narrow space inside the holder.

[0015]

An embodiment of the present invention will be described below with reference to the drawings. This embodiment shows an example in which an elastic force is applied to the support portion of the support member toward the supported portion of the holder.

In FIG. 1, reference numeral 1 denotes a pair of outer blades. As shown in FIG. 5, each of the outer blades 1 is formed of a flexible thin plate having a mesh-shaped whisker introduction hole 2 formed therein. The outer blade 1 has an arc-shaped cross section, and a mounting hole 3 is formed at an end. One end of each of these outer blades 1 is fixed to a pair of outer blade mounting plates 4 and the other end is fixed to a middle frame 5. As shown in FIGS.
The outer blade mounting hole 3 of the outer blade 1 engages with the outer blade mounting plate 4 and the locking boss 6 of the middle frame 5 to thereby form a pair of outer blades 1. , The outer cutter mounting plate 4 and the middle frame 5 are integrally connected, and these constitute the outer cutter body 7.

The outer cutter body 7 is mounted on an outer cutter holder 8 which is an example of a holder. As shown in FIGS. 1 to 5 and FIGS. 7 to 9 and 13, the outer blade holder 8 has a frame shape, and the outer surface of the outer blade body 7 is mounted on the inner surface as shown in FIGS. Board 4
The holding groove 9 in which the is fitted is formed. This outer blade 7
When the outer blade mounting plate 4 is fitted into the holding groove 9, the outer blade mounting plate 4 can slide up and down in the holding groove 9. The engagement holes 10 formed on both ends of the middle frame 5 are fitted into fitting bosses 11 formed on the lower surface of the end portion of the outer cutter holder 8 shown in FIGS. 7 and 13, and the fitting bosses 11 are swaged. Thereby, it is fixed to the outer blade holder 8. On both surfaces of the outer cutter holder 8 facing the end of the outer cutter case 20, there is formed a hole-shaped supported portion 12 serving as a pivoting center of the swing. The supported portion 12 is an outer blade case 2 described later.
This is along the direction of the line connecting the pair of 0 end portions 20a (the direction of the line connecting the pair of end portions 8a of the outer blade holder 8).

The outer blade holder 8 is rotatably supported by a pair of support members 13. The pair of support members 13 are respectively attached to opposite ends of an outer blade case 20 described later and provided to face each other. The pair of support members 13 are shown in FIGS.
As shown in FIG. 7 to FIG. 9 and FIG. 11 to FIG. 13, it is formed of a synthetic resin, has an upright plate shape, and has an upper portion formed in an arc shape.

A cut 13b is formed in the upper portion of each support member 13, and an elastic portion 13a having an arc shape is formed by the cut 13b. The elastic portion 13a is formed by a pair of end portions of an outer blade case 20 described later. It is elastically deformable along the direction of the line connecting 20a (the direction of the line connecting the pair of ends 8a of the outer blade holder 8), and exerts an elastic force toward the center of the outer blade holder 8.

Each support member 13 is provided at the center of the elastic portion 13a.
Are formed on the inner surfaces facing each other to form a round shaft-shaped support portion 14 fitted into the supported portion 12 formed at the end of the outer blade holder 8.
Are protruded along the direction of the line connecting the pair of ends 20 a of the outer cutter case 20. That is, the elastic portion 13 a applies an elastic force to the support portion 14 toward the center of the outer blade holder 8.

On the outer surfaces of the pair of support members 13, for example, three bosses 18 are formed, respectively. Also,
An elastic tongue 22 is formed on the pair of support members 13, and a locking claw 23 is formed at a lower end of the elastic tongue 22. The elastic tongue piece 22 is a pair of ends 2 of the outer cutter case 20.
0a (the direction of the line connecting the pair of end portions 8a of the outer blade holder 8) can be elastically deformed, and exerts an elastic force on the locking claw 23 toward the outside of the outer blade holder 8. Things.

Here, the pair of supporting members 13 are
The center 0 of 4 and the upper surface 23a of the locking claw 23 are formed while maintaining a constant distance S. The center 0 of the support portion 14 is the central axis of the swinging rotation of the outer blade holder 8,
The upper surface 23a of the main body frame 30
This is a reference position when attaching to the end 34 of the.

That is, the distance S is a reference distance when the pivoting center of the outer blade holder 8 is supported on the main body frame 30. The size of the distance S is such that the inner blade 40 pushed up by the spring 52 comes into contact with a predetermined pressure suitable for shaving, as described later.

The pair of support members 13 are fixed to the outer blade case 20. The outer blade case 20 has a frame shape,
It is made of die-cast, resin whose surface is plated, or made of a high specific gravity material containing lead particles. Three fixing holes 21 are formed at ends 20 a formed at both ends in the longitudinal direction of the outer blade case 20 so as to face three bosses 28 formed on the pair of support members 13, respectively.

The end portions 20a at both ends serve as an example of a fixing member for fixing the pair of support members 13, and the length between the opposed inner end surfaces 20b of the end portions 20a is equal to the length of the outer blade holder. 8 are set to be longer than the length between the outer end surfaces 20 of the end portions 8a at both ends of the wire 8. That is, the outer blade holder 8 can be inserted into and removed from the space between the end portions 20a at both ends through the space between the inner end surfaces 20b of the end portions 20a at both ends.

A concave portion 20c is formed at an inner portion of each of the ends 20a at both ends of the outer cutter case 20, and when the support portion 14 of the support member 13 is elastically deformed outward, the elastically deformed support portion is formed. 14 is made to escape by the concave portion 20c.

Then, as described above, the pair of support members 13
Is attached to the outer cutter case 20, and the outer cutter holder 8 is supported by the support member 13. That is, the pair of support members 13 are separately arranged inside the ends 20 a at both ends of the outer blade case 20. Each of the bosses 18 formed on the pair of support members 13 has a fixing hole 2 formed at an end 20a.
1, each boss 1 protruding outside the end 20a.
The tip of 8 is swaged. Thereby, the fixed boss 18
And the fixing holes 21 are engaged with each other, so that the pair of support members 13 are fixed to the ends 20 a at both ends of the outer cutter case 20.

The elastic tongue pieces 22 of the pair of support members 13 are in contact with the inner surfaces of both ends 20 a of the outer cutter case 20, and the locking claw 23 is located at the center of each end 20 a of the outer cutter case 20. It is locked to an edge 20d formed at the lower end of the portion.

On the other hand, the outer cutter holder 8 has its longitudinal direction extending along the longitudinal direction of the outer cutter case 20 (the direction connecting the pair of ends 20a of the outer cutter case 20). Between both ends of the outer blade holder 8
a is opposed to the ends 20 a at both ends of the outer cutter case 20. Then, the support portions 14 of the pair of support members 13 are pushed by the elastic portions 13a and inserted into the supported portions 12 formed at the end portions 8a at both ends of the outer blade holder 8, respectively. The member 13 is swingably supported by the member 13. The outer cutter holder 8 has a central axis O along the longitudinal direction of the outer cutter case 20.
-O swings around O.

Here, the end face 8b of the end 8a at both ends of the outer cutter holder 8 and the end face 2 of the end 20a at both ends of the outer cutter case 20.
0b gap occurs respectively between, but the length along the longitudinal direction of the outer cutter case 20 of each gap and M. Further, the engagement length along the direction connecting the ends 20a at both ends of the outer cutter case 20 in the engagement portion where the support portion 14 of the pair of support members 13 and the supported portion 12 of the outer cutter holder 8 are engaged with each other. L.
The engagement length L is larger than the gap length M, that is, L> M. This is because the outer blade holder 8 is the outer blade case 2
This is to prevent the escape from zero.

A neutral biasing spring 15 is attached to at least one of the support members 13. The neutral biasing spring 15 extends, for example, by bending a wire into an arc shape and bending both ends thereof so as to be substantially parallel to each other, and these both ends are passed through holes 16 formed in the support member 13. . Both ends of these neutral biasing springs 15
It is in contact with the lower end surface of the outer blade holder 8. When the outer cutter holder 8 swings and swings, one lower end of the outer cutter holder 8 pushes one end of the neutral biasing spring 15 so that the lower end of the outer cutter holder 8 elastically deforms, and when the outer swinging force of the outer cutter holder 8 is released. Then, the elastic restoring force of the neutral urging spring 15 acts on the outer cutter holder 8 to automatically return the outer cutter holder 8 to the neutral position, so that the outer cutter body 7 is always held at the neutral position. I have.

Further, the support member 13 is attached to the main body frame 30.
The outer blade case 20 is supported by the main body frame 30 by the support member 13.
1 is fixed to the cover 32, and the case cover 32 is fixed to the main body case 75 via another fixing screw 33. Ends 34 are formed at both ends of the main body frame 30, and these ends 3 are located between the ends 34.
The outer blade case 20 is fitted along the direction of the line connecting the four.

At the end portions 34, mounting holes 35 are provided which open left and right. When the outer cutter case 20 is fitted between the end portions 34, the support members 13 fixed at both ends of the outer cutter case 20 are provided. Are hooked on the upper side of the mounting hole 35. Thus, the outer cutter case 20 is supported by the main body frame 30 by the pair of support members 13.

A presser 36 is mounted in the mounting hole 35 of the main body frame 30. The pressing elements 36 close the outer opening of the mounting hole 35 and have a pressing projection 37 facing the locking claw 23 hooked on the upper side of the mounting hole 35. When these pressing elements 36 are pushed in, the pressing projections 37 press the locking claws 23 to elastically deform the elastic tongue pieces 22, whereby the locking claws 23 are disengaged from the upper side of the mounting holes 35 and the engagement is released. Therefore, the outer blade case 20 can be removed from the main body frame 30.

The pressing element 36 is pushed outward by a coil spring 38, and the mounting claw 39 is hooked on the main body frame 30 to keep the mounting hole 35 closed.

Reference numeral 40 denotes a pair of inner blades.
Are a number of inner blades 42 along the longitudinal direction of the blade base 41.
Is provided. These inner blades 40 are the outer blades 1
The inner blade is slidably in contact with the inner surface, and the inner blade 42 slides on the inner surface of the outer blade 1, 1 to cut the beard introduced from the outer blade 1 beard introduction hole 2.

A plurality of round bosses 4 are provided on the lower surface of the blade base 41.
The round bosses 43 are fitted in fitting holes 46 formed in the upper surface of the inner blade mounting base 45.
By caulking these round bosses 43, the inner blade 4
Numerals 0 are fixed to the inner blade mounting base 45, respectively.

A pivotal support hole 47 is formed on each side surface of the inner blade mounting base 45.
A pivot 49 formed on the mounting support 48 is fitted. For this reason, the inner blade 40 is supported by the mount support 48 so as to be capable of seesaw movement.

The mounting base support 48 is mounted on the inner blade base 50. A pair of guide pins 51 are provided upright on the inner blade base 50, and the mounting base support 48 is fitted into the guide pins 51 so as to be slidable up and down. Coil springs 52 are mounted on these guide pins 51, and these coil springs 52 press the mount support 48 upward.

Accordingly, the inner cutter 40 is pressed against the outer cutter 1 under the urging force of the coil springs 52. In this case, each of the inner cutters 40 is pushed toward the top of the outer cutter 1 by these independent coil springs 52.

Here, as described above, the pair of support members 1
3 and the upper surface 23 of the locking claw 23
a distance S that is large enough for the inner blade 40 pushed up by the spring 52 to contact the outer blade 1 at a predetermined pressure suitable for shaving.
Therefore, the inner blade 40 comes into contact with the inner surface of the outer blade 1 at a predetermined pressure suitable for shaving.

The inner cutter base 50 is provided with a fulcrum shaft 53 at an end along the longitudinal direction of the inner cutter 40, and is formed with arc-shaped slide surfaces 54, 54. When the inner blade base 50 is installed at a predetermined mounting position, the arc-shaped slide surface 54 has a predetermined radius circle centered on a rotation center O when the outer blade holder 8 swings. It is formed on the circumference.

The inner cutter base 50 is provided with an inner cutter base receiver 55.
It is rotatably attached to. The inner blade support 55 corresponds to the driving member of the present invention, and has a groove 56 for receiving the fulcrum shaft 53 at both ends, and a guide formed of an arc surface on which the slide surface 54 slides. Face 5
7 is formed.

A holding boss 58 is formed on the lower surface of the inner cutter base 50. A shaft portion 61 formed on the reciprocating drive body 60 is fitted to the holding boss 58.

The reciprocating drive body 60 is connected to the main body frame 30.
And the case cover 32, the shaft portion 61 is integrally provided at the center portion, and a fixed flange portion 63 is formed at both ends in the longitudinal direction via flexible thin portions 62. These fixing flange portions 63 are sandwiched between the main body frame 30 and the case cover 32, and are fixed by the fixing screws 31.
Are tightened together.

The shaft portion 61 formed in the center portion passes through a through hole 64 having a large opening formed in the main body frame 30 and engages with a holding boss 58 formed on the lower surface of the inner cutter base 50. . In addition, a packing 65 made of rubber or the like for preventing beard shavings from entering the main body casing is fitted into the through hole 64.

A sliding groove 66 is formed on the lower surface of the reciprocating drive 60. The sliding groove 66 extends perpendicular to the longitudinal direction of the reciprocating drive 60. An eccentric shaft 67 is engaged with the sliding groove 66. The eccentric shaft 67 is formed so as to be eccentric to the eccentric frame 68, and the eccentric frame 68 is attached to the motor shaft 71 of the drive motor 70. Drive motor 7
Reference numeral 0 is housed in a main body case 75, and operates by using a battery (not shown) as a power supply by operating a switch 76 provided on the main body casing 75 as shown in FIG. The eccentric top 68 penetrates through an insertion hole 69 formed in the case cover 32 and engages with the sliding groove 66.

Here, the assembly structure of the outer blade holder 8 provided with the outer blade body 7, the support member 13, and the outer blade case 20, which is a feature of the present invention, will be described.

In a state where the outer cutter holder is not inserted between the two end portions 20a of the outer cutter case 20, each end portion 2
The support portions 14 of the pair of support members 13 attached to the pair 0a protrude toward the center side (inside) of the outer cutter case 20 from the end surfaces 20b of the pair of end portions 20a.

First, at the time of assembling, the outer cutter holder 8 is inserted between the ends 20a with its longitudinal direction aligned with the direction of the line connecting the ends 20a at both ends of the outer cutter case 20.
Then, the end portions 8a at both ends of the outer cutter holder 8 push the support portions 14 of the pair of support members 13 projecting between the end surfaces of the end portions 20a at both ends of the outer cutter case 20 outward, and a pair of The elastic portion 13a of the support member 13 elastically deforms outward. The elastic portions 13a of the pair of support members 13 which have been elastically deformed outward are released by concave portions 20c formed at both ends 20a of the outer blade case 20.

Then, the entire outer cutter holder 8 is formed of the outer cutter case 2.
When inserted between the end surfaces of the end portions 20a at both ends of the outer blade holder 8, the supported portions 12 formed at both end portions 8a of the outer blade holder 8
It comes to a position facing the support portion 14 of the support member 13. Then, the support portions 14 of the pair of support members 13 return to the original positions by the action of the elastic portions 3a, and the both end portions 8a of the outer blade holder 8 are returned.
Engages with the supported portion 12.

In the thus assembled assembly, both ends of the outer blade holder 8 are supported by the support portions 14 of the pair of support members 13.
The outer blade holder 8 is rotatable about a rotation center axis 0 along a line connecting ends 20a at both ends of the outer blade case 20 which is a pair of fixing members. Provided.

Further, an engagement portion where the support portion 14 of the pair of support members 13 and the supported portion 12 of the outer cutter holder 8 engage with each other in a direction along a line connecting both ends 20a of both ends of the outer cutter case 20. The engagement length L is equal to the length of the end portions 20 at both ends of the outer cutter case 20.
a in the direction along the line connecting the ends 20a at both ends of the outer cutter case 20 in the gap formed between the end face 20b of the outer cutter case 20 and the end face 8b of the end 8a at both ends of the outer cutter holder 8 facing the end face 20b. It is set larger than the value of the length M.

For this reason, the outer blade holder 8 is
Length M along the direction of the line connecting the ends 20a at both ends of the
Is displaced toward the one end 20a side with a distance of one end 8a of the outer cutter holder 8 to the one end 2 of the outer cutter case 20.
0a, the end face of the other end 8a of the outer cutter holder 8
8b and the end face 20b of the other end 20a of the outer cutter case 20
Is increased from M to 2M, the other
The support portion 14 of the support member 13 and the other end of the outer blade holder 8
The engagement length of the engaging portion 8a with the supported portion 12 is
L is greater than the displacement distance M (gap length M) of the die 8
Therefore, the supported portion of the other end 8a of the outer blade holder 8 for this reason
12 is removed from the support portion 14 of the other support member 13
To prevent the outer blade holder 8 from dropping and secure the outer blade holder 8
I can really support it. Further explanation will be added. Outer blade holder 8
Is inserted between both ends of the outer blade case 20, the outer blade
Supporting a pair of support members 13 provided at both ends of the case 20
Part 14 and the supported part 12 formed at both ends of the outer blade holder 8
Are engaged, and the outer blade holder 8 is
At the center between the two ends of the outer blade case 20
Supported. Thereby, the end surfaces of both ends of the outer cutter holder 8 are
Gaps are formed between the outer blade case 20 and the end surfaces of both ends.
You. The length of each gap along the longitudinal direction of the outer cutter case 20
Is M. In this state, the outer blade holder 8 holds the outer blade case 2
0 with one end of the gap with the length M of the gap.
It is displaced until it comes into contact with one end of the outer cutter case 20, and
In addition, the length M of the gap toward the other end of the outer cutter case 20 is also increased.
Until the other end contacts the other end of the outer blade case 2
It can be displaced. For this reason, the outer blade holder 8
When moved to one end side or the other end side of the outer blade case 20
And a pair of supported portions 12 at both ends of the outer blade holder 8.
To prevent the member 13 from being disengaged from the support portion 14.
First, the supported portion 12 at the end of the outer blade holder 8 and the supporting member
Length L of the engaging portion with which the support portion 13 of FIG.
Between the end face of the outer cutter holder 8 and the end face of the outer cutter case 20.
Must be set longer than the length M of the gap formed in
It becomes important. Thus, the support portion 12 of the outer cutter holder 8 and the support portion 12 are supported.
Length of the engaging portion of the holding member 13 with which the supporting portion 14 engages
By setting the length L, the outer blade holder 8 is moved to one end.
To the outer blade holder 8
Is the other supported portion 12 of the support member 13
Can maintain the engagement of the two without disengagement
You.

Further, both ends 8a of the outer blade holder 8 are connected to the respective elastic portions 13 via the support portions 14 of the pair of support members 13.
a, a force is applied toward the center of the outer cutter holder 8 in the direction of the line connecting the ends 20a at both ends of the outer cutter case 20, and the ends 20a at both ends of the outer cutter case 20 are removed. Displacement along the direction of the connecting line is restricted .

Therefore, in this embodiment, the support portion 14 of the support member 13 rotatably supports the outer cutter holder 8 instead of the conventional screw, and the outer cutter holder 8 is provided at both ends of the outer cutter case 20. Serves to support the end portion 20a so as not to come off,
The elastic portion 13a of the support member 13 presses both ends of the outer blade holder with elastic force instead of the conventional elastic member, and holds the outer blade holder 14 between the ends 20a at both ends of the outer blade case 20 without rattling. It plays a supporting role.

Therefore, the outer blade holder 8 is connected to the pair of support members 1.
By using a common part for supporting the outer blade holder 13 without rattling and supporting the outer blade holder 13 without rattling, the outer blade holder 8 can be paired with a small number of parts and with a simple operation. The supporting member 13 can be supported between the supporting members 13 so as to be able to swing and swing.

Further, when the outer cutter holder 8 is inserted between the end surfaces 20b of the two end portions 20a of the outer cutter case 20, both ends of the outer cutter holder 8 are connected to the two ends 20 of the outer cutter case 20.
The supporting portion 14 of the supporting member 13 projecting between the end surfaces of the outer blade holder 8 is displaced outward against the elastic force of the elastic portion, and
Is disposed between the end surfaces 20b of the ends 20a at both ends of the outer cutter case 20, the support portion 14 returns to the original position by the action of the elastic portions 13a of the pair of support members 13, and the outer cutter holder 8
Is engaged with the supported portion 12 of the end 8a of the
3, the outer blade holder 8 is moved to the two ends 2 of the outer blade case 20.
The operation of supporting the outer blade holder 0a can be easily performed without being restricted by the narrow space inside the outer blade holder 8.

A description will be given of a case where shaving is performed by an electric shaver having such a configuration. When the motor 70 is rotated by operating the switch 76, the rotation of the motor shaft 71 causes the eccentric shaft 67 of the eccentric frame 68 to eccentrically rotate (swing). Although the rotation of the eccentric shaft 67 is transmitted to the reciprocating drive body 60, the eccentric shaft 67 is engaged with the sliding groove 66, so that the eccentric rotational movement of the eccentric shaft 67 is moved in the front-rear direction by the sliding groove 66. The absorption of the components causes the reciprocating drive 60 to reciprocate in the longitudinal direction (lateral direction = blade width direction).

Since the reciprocating drive body 60 has the flexible thin portions 62 at both ends in the longitudinal direction, when the reciprocating driving force is applied, the flexible thin portions 62 are bent and deformed, and only the central portion is elongated in the longitudinal direction. Reciprocating (left and right). Therefore, the shaft portion 61 formed at the center portion reciprocates in the longitudinal direction. This reciprocating motion drives the inner cutter rest receiver 55 reciprocatingly, so that the inner cutter rest 50
The inner blade 40 is reciprocated in the longitudinal direction via the mounting base support 48.

For this reason, the beard introduced from the beard introduction hole 2 of the outer cutter 1 is cut by the shearing action of the blade 42 of the inner cutter 40 and the beard introduction hole 2.

In this electric shaver, since the outer blade 1 and the outer blade holder 8 are rotatable with respect to the outer blade case 20, the tops of the pair of outer blades 1 simultaneously come into contact with the skin. That is, the outer blade holder 8 is supported by the support shaft 1.
Since the outer blade holder 20 is rotatably supported on the outer blade case 20 with the center 4 as a center O, if one of the pair of outer blades 1 tries to hit the skin, an eccentric load acts and the outer blade holder 8 is, for example, as shown in FIG. The pair of outer blades 1 and 1 are automatically inclined forward and backward from the P position to the Q position, and simultaneously contact the skin. For this reason, the pair of front and rear outer blades 1 can shave with the front and rear pair of blades because the tops of the respective mountains hit the skin, and the shaving is performed twice,
Shaving efficiency is increased.

In this case, the inner blades 4 slidingly contacting each outer blade 1
Numeral 0 is pressed against the outer cutter 1 by a coil spring 52 provided between the inner cutter base 50 and the mounting base support 48, and the inner cutter base 50, the coil spring 52 and the mounting base are Since the support 48 also swings and swings with the inner blade 40, each inner blade 40 is always
Pressed towards the top of the.

Here, since the coil spring 52 rotates integrally with the inner cutter 40, the inner cutter 40 is always in the direction of the top of the outer cutter 1, that is, in the direction perpendicular to the skin as shown at the position Q in FIG. Become pressed to. For this reason, the maximum contact pressure acts on the top of the outer blade 1 and the inner blade 4
0 does not separate from the outer cutter 1, and there is no gap between the blade 42 of the inner cutter 40 and the inner surface of the outer cutter 1. Therefore, good sharpness can be maintained and cutting performance is enhanced.

The inner cutter 40 also rotates in accordance with the swing of the outer cutter holder 8, and the inner cutter 40 is slidably guided by the inner cutter holder 50 with respect to the inner cutter holder holder 55. Allowed by doing. A fulcrum shaft 53 is provided at an end of the inner cutter base 50, and an arc-shaped slide surface 54 is formed. On the other hand, the fulcrum shaft 53 is provided at both ends of the inner cutter base receiver 55. A receiving groove 56 is formed, and a guide surface 57 composed of an arc surface on which the slide surface 54 slides is formed. Then, the fulcrum shaft 53 is guided by the groove 56 and the slide surface 54 is guided by the guide surface. The sliding contact with 57 allows the inner blade base 50 to rotate.

It should be noted that the present invention is not limited to only the above-described embodiment, but can be implemented with various modifications.

In this embodiment, the elastic force is applied to the support portion of the support member toward the supported portion of the holder. However, the present invention is not limited to this, and the elastic force is applied to the supported portion of the holder toward the support portion of the support member. It is also possible to adopt a configuration in which an elastic force is applied to the support portion of the support member and the supported portion of the holder toward the opposing sides.

In the above-described embodiment, the outer blade holder that holds the outer blade is used as the holder. However, the present invention is not limited to this, and the holder may also hold the inner blade in addition to the outer blade. Further, the support member is not limited to the above-described embodiment. In the above-described embodiment, the support member is formed independently and attached to the end wall of the outer blade case, which is an example of the fixing member, but may be formed integrally with the outer blade case. The support member is not limited to the configuration of the embodiment. The fixing member supporting the outer cutter holder is not limited to the end wall of the outer cutter case, but may be another member provided on the main body of the electric shaver.

[0069]

As described above, according to the electric shaver of the present invention, a supporting member is provided between the pair of fixing members and the holder, and the supporting members are provided on the pair of fixing members. The holder is provided with a supported portion to which the support portion engages, and an elastic force is applied to at least one of the support portion and the supported portion toward the other side. The length of the engagement portion where the portion engages is set to be larger than the length of the gap formed between the surface of the fixing member and the surface of the holder facing this surface.

For this reason, the supporting portion of the supporting member and the supported portion of the holder serve to rotate the holder in place of the conventional screw and support the holder so as not to come off from the fixing member. Instead of the elastic member, both ends of the holder are pressed by an elastic force to support the holder between the pair of fixing members without play. Therefore, the holder can be supported between the pair of support members in a swingable manner with a small number of parts and without backlash.

Further, when the holder is inserted between the pair of fixing members, at least one of the supporting portion of the supporting member and the supported portion of the holder is displaced against the elastic force, and the entire holder is displaced by the pair of fixing members. When it is located between them, the displaced portion returns to its original position by the elastic force, and the support portion of the support member and the supported portion of the holder engage with each other. Therefore, the operation of supporting the holder on the fixing member by the support member can be easily performed without being restricted by the narrow space inside the holder. Then, the support portion of the support member and the holder
A pair of fixing members at an engagement portion where the support
The engagement length in the direction along the connecting line is
Fixed in the gap between the surface of the holder facing the
Set the length longer than the length along the line connecting the members.
You. For this reason, the holder is displaced toward one of the fixing members and the holder is displaced.
The surface of the solder contacts the surface of one of the fixing members, and
When the distance between the other fixing member and the surface is enlarged
Also, the support portion of the other support member is separated from the supported portion of the holder.
Prevents the holder from dropping and ensures the holder
I can support it.

[Brief description of the drawings]

FIG. 1 is a sectional view taken along the line AA of FIG. 2 showing a head portion of an electric shaver according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line BB of FIG. 1 in the embodiment.

FIG. 3 is a sectional view taken along the line CC of FIG. 1 in the embodiment.

FIG. 4 is an exploded cross-sectional view showing the head unit in the embodiment.

FIG. 5 is an exemplary exploded perspective view showing a head unit in the embodiment.

FIG. 6 is a front view showing the appearance of the electric shaver in the embodiment.

FIG. 7 is an exploded perspective view showing the outer blade assembly in the embodiment.

FIG. 8 is a sectional view showing the outer blade assembly according to the embodiment.

FIG. 9A is a cross-sectional view showing an outer cutter case to which a support member according to the embodiment is assembled, and FIG. 9B is an end view showing the outer cutter case. FIG. 9C is a sectional view taken along the line DD in FIG.
(D) is a diagram showing a state in which the support member has been elastically deformed.

FIG. 10A is a cross-sectional view showing an outer blade case in the embodiment. (B) is an end view showing an outer cutter case. FIG. 10C is a sectional view taken along the line EE in FIG.

FIG. 11A is a diagram showing a front surface of a support member in the embodiment. (B) is a figure which shows the side surface of a support member. (C) is a diagram showing the back surface of the support member.

FIG. 12A is a perspective view showing a front surface of a support member in the embodiment. (B) is a perspective view showing the back surface of the support member.

FIG. 13A is a cross-sectional view showing an outer blade holder in the embodiment. (B) is an end view which shows an outer blade holder. (C) is FIG.
3A is a cross-sectional view along the line FF.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Outer blade, 7 ... Outer blade body, 8 ... Outer blade holder, 12 ... Supported part, 13 ... Support member,
13a: elastic part, 14: support part,
20 ... outer blade case, 20a ... end (fixing member),
22: elastic tongue piece, 23: locking claw, 30
... body frame, 40 ... inner blade, 42 ...
Blade: 45: Inner blade mount, 48: Mounting base support, 50: Inner blade, 60: Reciprocating drive, 70: Drive motor, 75: Body case.

Claims (1)

(57) [Claims] 1. An electric shaver having an outer blade and an inner blade that reciprocates and shave while being in contact with the inner surface of the outer blade, comprising: a pair of fixed members disposed to face each other at a predetermined interval; A holder disposed between the pair of fixing members and having at least the outer blade attached thereto and having a supported portion at a portion facing the fixing member; and a holder positioned between the pair of fixing members and the holder. A support member provided on each of the pair of fixing members and having a support portion that engages with a supported portion of the holder and rotatably supports the holder; and a support portion of the support member and the holder. at least one of the supported portion is elastic force is applied toward the other side, and the and the supported portion of the holder and the supporting portion of the supporting member
The engaging length of the engaging portion in the direction along the line connecting the pair of fixing members is the gap in the gap formed between the surface of the fixing member and the surface of the holder opposed to this surface. An electric razor having a length greater than a length in a direction along a line connecting a pair of fixing members.