JP2001347082A - Reciprocating electric shaver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact reciprocating electric shaver allowing an outer blade cassette to be attached to the main body with a strong holding force, to be stably and securely held for a long period of time and to be attached to/detached from the main body easily. SOLUTION: This reciprocating electric shaver has the outer blade cassette 5 for holding the blade head to be engaged detachably on the main body side. A lateral slit 6 is formed on the bottom side of a shorter side part 5a of the nearly rectangular outer blade cassette 5. The lower part of the slit 6 is an elastic engagement bar 7, and a button part 8 is mounted in the outer blade cassette 5 for pressing the engagement bar 7. An engagement hook 9 is mounted to project on the main body side to be elastically engaged with the engagement bar 7 when the outer blade cassette 5 is pushed down toward the main body. The engagement of the engagement hook 9 and the engagement bar 7 is released with the pressing of the button part 8.

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, and more particularly to a technique for detachably connecting an outer blade cassette holding a blade head to a main body.

[0002]

2. Description of the Related Art Conventionally, as an example of a structure for attaching and detaching an outer blade cassette holding a blade head to a main body side, Japanese Patent Application Laid-Open No. HEI 5-115 / 1993
No. 626, a slit is provided at the lower end of the short side of the outer blade cassette, a hook protruding outward on the lower surface at the center of the lower part of the slit, a button portion is provided on the outer side surface, and the hook is provided on the main body side. A device having a locking receiving portion is disclosed.
In this conventional example, when the outer blade cassette is pushed downward toward the main body side, the hook is elastically engaged with the engagement receiving portion, and the button portion is pressed inward, whereby the hook is elastically displaced below the slit. Moves inward to release the locked state.

[0003]

However, in the above conventional example, when the width of the hook is increased to increase the holding force of the outer blade cassette when the outer blade cassette is attached to the main body, the slit width is increased. The rigidity of the lower part increases, and a large force is required to elastically displace the lower part of the slit, and the power required for attaching and detaching the outer blade cassette to and from the main body is increased, and the operability of attaching and detaching is deteriorated. Problem.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide a compact, high holding force when the outer blade cassette is mounted on the main body of the outer blade cassette. An object of the present invention is to provide an electric razor that can stably and reliably hold a cassette on a main body for a long period of time and that can easily perform an operation of attaching and detaching an outer blade cassette to and from the main body.

[0005]

According to the present invention, there is provided a reciprocating type in which an outer blade cassette holding a blade head is detachably engageable with a main body. A lateral slit 6 is provided on the bottom side of the short side portion 5a of the outer blade cassette 5 which is an electric razor and has a substantially rectangular shape, and a lower portion of the lateral slit 6 is an elastic engaging bar 7 and an outer blade. The cassette 5 is provided with a button portion 8 for pressing the engaging bar 7, and the outer blade cassette 5 is elastically locked by the engaging bar 7 when the outer blade cassette 5 is pushed down toward the main body 1, and the button It is characterized in that the engaging hook 9 which is released from the locked state with the engaging bar 7 by the pressing of the portion 8 is protruded. Is provided not on the engaging bar 7 but on the main body 1 side. By increasing the Kakarigohaba M clauses 9, without increasing the rigidity of the engagement bars 7, it is possible to improve the retention of the body 1 of the outer blade cassette 5. Therefore, it is possible to stably and reliably hold the outer cutter cassette 5 on the main body 1 for a long period of time while improving the operability of attaching and detaching the outer cutter cassette 5 to and from the main body 1.

It is preferable that the engaging hook 9 protrudes from the inner surface 10a of the outer cutter frame 10 fixed to the main body 1 side. In this case, the outer cutter frame 10 holds the engaging portion of the outer cutter cassette 5 with the engaging portion. It becomes possible to integrally configure the unit.

It is preferable to extend the button portion 8 in the upward direction D. In this case, the area to be pushed by the finger of the button portion 8 of the outer cutter cassette 5 increases, and the button portion 8 is easily pushed.

It is preferable that the lower end 40a of the molded product constituting the cover piece 40 of the blade head 2 be overlapped with the upper end 8a of the button portion 8. In this case, the overlap removes whiskers from inside the main body 1. It is possible to prevent spillage to the outside and to prevent damage to the molded product.

The vertical width E of the engaging bar 7 is preferably larger at the center 7a side than at the end 7b of the engaging bar 7. In this case, the holding force of the outer cutter cassette 5 is improved, and When the outer blade cassette 5 is attached or detached, stress can be prevented from being concentrated on the central portion 7a side where the bending allowance of the engaging bar 7 is large.

Preferably, the thickness F of the engaging bar 7 is made larger at the center 7a side than at the end 7b of the engaging bar 7.

It is preferable that the position where the engaging hook 9 is hooked on the engaging bar 7 be inside the width G of the button portion 8.
In this case, the engagement hook 9 can be engaged with the engagement bar 7 in the vicinity of the portion of the engagement bar 7 pressed by the button portion 8, so that the button portion 8 allows the outer blade cassette 5 to be more smoothly attached and detached. Become.

An engaging hook 9 for the engaging bar 7
Of the engaging bar 7 at the center 7 rather than at the end 7b.
It is preferable that a is larger than the above. In this case, the engaging force can be improved in the vicinity of the central portion 7a where the allowance of the engaging bar 7 is large, and the detachability of the outer cutter cassette 5 is deteriorated. Thus, the holding force of the outer cutter cassette 5 on the main body 1 is improved.

It is preferable that the protruding width J of the engaging hook 9 is reduced from the central portion 9a to the end 9b of the engaging hook 9. In this case, the outer cutter cassette 5 to the main body 1 is preferably used.
Can be improved, and the attachment and detachment of the outer blade cassette 5 can be performed more smoothly.

Preferably, the engaging hook 9 is slidable in the vertical direction K of the outer cutter cassette 5, in which case the height position of the outer cutter cassette 5 can be freely adjusted, and the height adjustment of the blade head can be performed. Becomes possible.

The side wall 10b of the outer cutter frame 10
Of the outer blade cassette 5 by extending the end of the
It is preferable to form an extension wall portion 10c opposed to the end of the outer cutter cassette 5, and in this case, the play of the outer cutter cassette 5 can be further reduced by the extension wall portion 10c.
From the lateral slit 6 provided on the front surface 5 of the outer cutter cassette 5
S can be prevented from spilling on c or the rear surface 5d.

A net blade comprising a float support frame 12 mounted on the outer blade cassette 5 so as to be freely floatable, an outer blade frame 13 supported by the float support frame 12, and an outer blade 3 mounted on the outer blade frame 13. Equipped with a cassette 14,
It is preferable that the outer cutter frame 13 be vertically movable with respect to the float support frame 12, and in this case, when the outer cutter cassette 5 is detached from the main body 1 and the outer cutter 3 is pushed downward,
Since no force is applied to the outer blade 3, the outer blade 3 can be prevented from being deformed.

In the float support frame 12, a vertically elongated groove 15 is provided.
It is preferable that the outer cutter frame 13 is provided with a locking rib 16 that is guided by the longitudinal groove 15 to position the outer cutter frame 13 back and forth and to prevent the outer cutter frame 13 from coming off. In this case,
When the outer cutter cassette 5 is removed from the main body 1, deformation of the outer cutter 3 can be prevented, and the outer rib frame 13 does not come off the float support frame 12 by the locking rib 16, thereby improving the assembling property.

A groove 15a is formed in the float support frame 12.
It is preferable to provide the outer blade frame 13 with an elastic arm 17 that elastically engages with the groove 15a. In this case, the deformation of the outer blade 3 can be significantly reduced, and the outer blade 3 When attaching the blade frame 13,
The outer cutter frame 13 is moved by the elastic arm 17 to the float support frame 1.
2, the assemblability is improved.

A slit blade 2A which can be floated up and down by a float spring 18 is disposed adjacent to the outer blade 3 of the net blade cassette 14, and the slit blade 2A is mounted on the float support frame 12 of the net blade cassette 14. Preferably, a spring receiving portion 19 for receiving the end of the float spring 18 is provided, and a tapered portion 20 for guiding is provided around the spring receiving portion 19. In this case, the end of the float spring 18 is connected to the spring receiving portion 19. The assembling property is improved by the guiding effect of the tapered portion 20 when the fitting is performed.

It is preferable that the spring receiving portion 19 is formed by a through hole 21 having a side portion 21a opened.
Instead of fitting the float spring 18 into the spring receiving portion 19 from above, the float spring 18 can be positioned and fitted from the side L.

It is preferable that a step 18a having a small diameter is formed at the end of the float spring 18 and the step 18a is held by a spring receiving portion 19. In this case, the step 18a of the float spring 18 is preferably used. Is positioned vertically with respect to the spring receiving portion 19, so that the float spring 18 can be prevented from coming off in the upward direction.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the accompanying drawings.

As shown in FIGS. 1 to 7, this reciprocating electric shaver has three blade heads 2 arranged in parallel at the upper end of a main body 1, and these three blade heads 2 , Are simultaneously driven by the linear motor 130.

As shown in FIG. 5, the blade head 2 is composed of a slit blade 2A for rough shaving at a central portion and net blades 2B and 2B arranged on both sides thereof. The inner blades corresponding to the outer blades 3 of the blades 2A and 2B are reciprocally driven, and the three blade heads 2 can float in the vertical direction. In FIG. 5, reference numeral 63 denotes a switch, and 64 denotes a storage battery.

FIG. 2 shows a configuration diagram of the blade head 2.
The net blade cassette 14 includes a float support frame 12, a foil-shaped outer blade 3, and an outer blade frame 13. The outer blade 3 is attached to the outer blade frame 13, and the outer blade frame 13 is attached to the float support frame 12. To be integrated from below. Projections 31 are provided on both ends of the rear surface 13a of the outer cutter frame 13. This projection 31 is provided in the slit blade cassette 3.
By hitting the receiving surface 134 (FIG. 3) of the second slit holding member 33, the slit blade cassette 32 floats in conjunction with the upper and lower floats of the net blade cassette 14. Further, as shown in FIG. 7, through holes 2 are provided at both ends of the bottom side of the rear surface 13a of the outer cutter frame 13 so that the end turns 18b provided at the lower end of the float spring 18 of the slit blade 2A enter.
1 are provided respectively.
Further, the side surface 12a and both end surfaces 1a of the float support frame 12
2b respectively protrude downward with an interval on the outer peripheral side of the outer blade cassette 5. Further, as shown in FIG. 6, both end surfaces of the float support frame 12 are connected to the inner wall 1.
2c and an outer wall 12d.
And the outer wall 12d are connected to each other by an engagement piece 12e.

Inner blade 55 in net blade cassette 14
As shown in FIG. 4, is mounted on the upper ends of a pair of drivers 56 projecting from the upper end of the main body 1 while being biased upward by an inner blade push-up spring 57. The inner blade 55 comes into contact with the inner surface of the outer blade 3 of the net blade cassette 14 when the net blade cassette 14 is attached to the main body 1 via the outer blade cassette 5 and the outer blade frame 10. The reciprocating vibration of the linear motor 130 is transmitted to the inner blade 55 via the driver 56. 60 in FIG.
Is a spring stopper. On the other hand, the slit blade cassette 3
The slit inner blade 34 incorporated in the drive 2
Drive rod 58 and slit joint 35 attached to
(FIG. 3) is connected to transmit the motion of the linear motor 130.

FIG. 3 shows a configuration diagram of the slit blade cassette 32. The slit blade cassette 32 includes a slit outer blade 4, a slit inner blade 34, a slit holding member 33, a slit joint 35, and a slit push-up spring 36. The slit outer blade 4 is formed by bending a single plate, and has a bent portion 4a at an upper end of a vertical wall on both sides and a concave portion 4b at a center of an upper wall.

Engaging portions 37 are provided at both ends of the slit outer blade 4, respectively.
The slit holding members 33 are fixed to both ends of the slit outer blade 4 by heat sealing to the heat seal bosses 3. Both slit holding members 33 are
A spring receiver 39 is provided on the inner surface side facing each other, and a cover piece 40 and a vertical rib 41 formed on the inner surface of the cover piece 40 are provided on the outer surface side. Further, the lower end of each slit holding member 33 is provided with a locking portion 42 protruding downward, a spring stopper 43, and a receiving surface 134.

The slit inner blade 34 has a mounting hole 45 at the center of the groove 34b and a protrusion 46 on the upper surface of the slit joint 35, with both sides 34a of the groove 34b being sandwiched by the projecting walls 44 of the slit joint 35. The heat seal boss 47 is fitted and held by heat sealing the heat seal boss 47, and is in sliding contact with the inner surface of the outer blade 3 by driving the slit joint 35. The upper end of the slit push-up spring 36 is fitted into the spring receiver 48 at the lower end of the slit joint 35, and the lower end is engaged with the spring receiver 39 of the slit holding member 33, so that the sliding of the slit inner blade 34 and the slit outer blade 4 is performed. The sharpness can be ensured on the moving surface. The net blade cassette 14 and the slit blade cassette 32 are mounted on the main body 1 having the linear motor 130 via the outer blade cassette 5 and the outer blade frame 10.

The outer blade cassette 5 has a substantially rectangular shape.
As shown in FIG. 1, a plurality of float spring pieces 50 integrally project upward from the upper edges of the front and rear walls along the long side 5b. Short side 5a of outer blade cassette 5
Are formed with a pair of front and rear vertical slits 51 each having an open upper end.
A pair of hooks 52 opposing each other are provided at the upper end of the side wall of the. A pair of front and rear locking hooks 152, 152 project from the inner surface of the center of the short side portion 5 a of the outer blade cassette 5 at a position sandwiched between the vertical slits 51, 51.

Here, the mounting of the net blade cassette 14 to the outer blade cassette 5 is performed by using the net blade cassette 1 shown in FIG.
4 by placing the float support frame 12 and the outer cutter frame 13 integrally on the outer cutter cassette 5 and positioning the engaging piece 12 e of the float support frame 12 in the longitudinal slit 51 of the outer cutter cassette 5. Do. At this time, the hook 52 (FIG. 1) of the outer cutter cassette 5 is engaged with the engagement piece 1 of the float support frame 12.
It is located in a vertically long hole 12f (FIG. 7) provided above 2e.
Thus, the net blade cassette 14 in which the engaging piece 12e is positioned in the vertical slit 51 and the hook 52 prevents the engaging piece 12e from coming off, is held by the outer blade cassette 5 so as to be vertically movable. . Outer blade cassette 5
2 is in contact with the lower surface of the protruding portion of the outer blade frame 13, so that the net blade cassette 14
Is spring-biased upward and can float freely.

On the other hand, the slit blade cassette 32, which is disposed between the front and rear outer blade cassettes 5 and 5 so as to be movable up and down, engages the locking portion 42 (FIG. 3) of the slit holding member 33 with the outer blade cassette 5. Engagement with the stop hook 152 (FIG. 1) prevents the slipping out, and the locking portion 42 of the slit holding member 33 slides up and down in the vertical groove 61 on the inner surface of the outer cutter cassette 5, and the slit holding member The vertical ribs 41 provided on the cover piece 40 located outside the outer blade 33
The slit blade cassette 32 is vertically slidably supported by the outer blade cassette 5 by sliding up and down in the vertical groove 62 on the outer surface.

At this time, in the outer blade cassette 5, the slit blade cassette 32 floats up and down by itself, but when the net blade cassette 14 floats, the outer blade frame 1
The lower surface of the protrusion 31 provided on the side surface of the slit 3 is connected to the receiving surface 134 of the slit holding member 33 so as to be connected.
In conjunction with the upper and lower floats of the net blade cassette 14, the slit blade cassette 32 also floats up and down. As shown in FIG. 7, the slit blade cassette 32 is biased upward by a float spring 18 disposed between the slit blade cassette 32 and a spring receiving portion 19 of one of the outer blade frames 13 so as to be floatable. At the same time, one outer blade frame 13 receiving the float spring 18 is
8 urges the spring downward. With this structure, the net blade cassette 14 having the outer blade frame 13 on the side spring-biased downward by the float spring 18 can be easily floated with a small force, and the skin contact can be improved. . In this example, the switch 6 of the main body 1
A spring receiving portion 19 is provided on the outer blade frame 13 on the 3 (FIG. 4) side to receive the float spring 18. With this structure, the float force of the slit blade cassette 32 can be used as a force for pushing down the net blade cassette 14 on the switch 63 side, and is smaller than the net blade cassette 14 on the opposite side to the switch 63 side. Float is possible with force. Accordingly, when shaving is performed by moving from the net blade cassette 14 on the side opposite to the switch 63 side, the net blade cassette 14 on the switch 63 side that follows later easily floats downward. , Which can further improve the skin contact.

The side wall portion 10b of the outer cutter frame 10
As shown in FIG. 1, one end of the outer blade cassette 5 extends substantially at a right angle, and forms an extension wall 10c facing the end of the long side 5b of the outer cutter cassette 5. The extension wall portion 10c has a function of further reducing the rattling of the outer blade cassette 5, and a function of preventing spillage of whiskers on the rear surface of the outer blade cassette 5 from the lateral slit 6 provided in the outer blade cassette 5. do. The extension wall 10c may be provided on each of the front and rear surfaces on the long side of the outer blade cassette 5.

Next, the mounting structure of the outer blade cassette 5 to the main body 1 will be described. As shown in FIG. 1, FIG. 8, and FIG. 9, the short side 5a
A horizontal slit 6 is provided over substantially the entire length in the width direction, and a lower portion of the horizontal slit 6 is an engagement bar 7 detachably engaged with the main body 1 side. An engaging hook 9 provided on an outer blade frame 10 described later can be detachably engaged with the upper surface of the bar 7. Both end portions 7b of the engaging bar 7 are long side portions 5b on both front and rear sides of the outer cutter cassette 5.
, Respectively, and the central portion 7a side of the engaging bar 7 can be flexed in its thickness direction (the direction indicated by a in FIG. 8). On the outer surface of the central portion 7a of the engagement bar 7, a button portion 8 for pressing the engagement bar 7 inward is provided. Here, the button section 8 is connected to the connecting section 53.
It is integrally connected to the central portion 7a of the engaging bar 7 via (FIG. 8).

On the other hand, the outer blade frame 1 fixed to the main body 1
In the center of the side wall portion 10b, as shown in FIGS.
A vertical notch 54 into which the connecting portion 53 of the button portion 8 provided on the outer blade cassette 5 is inserted from above is provided, and the engaging portions are provided on both sides of the notch 54 on the inner surface of the side wall portion 10b. A pair of front and rear engagement hooks 9 that detachably engage with the bar 7 are protrudingly provided. The upper surface of the engagement hook 9 is an inclined surface 9c that is lower toward the tip, and
Has a horizontal locking surface 9d. In this example, two engaging hooks 9 provided on the outer cutter frame 10 are provided on the inner surface of one side wall 10b, and two engaging hooks 9 are provided on the inner surface of the other side wall 10b. The combined width M (FIG. 8) is increased.

The mounting of the outer blade cassette 5 on the main body 1 is as follows.
The outer cutter cassette 5 is pushed down toward the outer cutter frame 10, and the lower surface of the engaging hook 9 is elastically engaged with the upper surface of the engaging bar 7 of the outer cutter cassette 5. That is, when the outer cutter cassette 5 is pushed down into the outer cutter frame 10, the engaging bar 7 hits the engaging hook 9 and bends over the inclined surface 9c of the engaging hook 9 so that the engaging hook 9 is horizontally locked. It is elastically locked to the surface 9d. On the other hand, the removal of the outer blade cassette 5 from the main body 1 is performed by pressing the button portion 8 of the outer blade cassette 5.
Is pressed inward to elastically displace the engagement bar 7 inward. As a result, the center 7a side of the engaging bar 7 bends inward and disengages from the engaging hook 9, and the engaged state between the engaging bar 7 and the engaging hook 9 is released.

If the engaging hook 9 is provided on the engaging bar 7, the engaging width of the engaging hook 9 is increased in order to increase the holding force of the outer blade cassette 5 in the main body 1. M
If the size of FIG. 8 is increased, the rigidity of the engagement bar 7 is increased, and the operation of attaching and detaching the outer blade cassette 5 to and from the main body 1 becomes difficult. On the other hand, in the present invention, since the engaging hook 9 is provided not on the engaging bar 7 of the outer cutter cassette 5 but on the outer cutter frame 10 fixed to the main body 1, the engaging width M (FIG. Engagement bar 7
Since the rigidity of the outer blade cassette 5 does not increase, the attachment and detachment of the outer blade cassette 5 to and from the main body 1 can be easily performed with an appropriate force, and good operability can be secured. At the same time, since the engagement width M of the engagement hook 9 is large, the holding force of the outer cutter cassette 5 can be increased. Therefore, it is possible to stably and reliably mount the outer blade cassette 5 to the main body 1 over a long period of time while improving the operability of attaching and detaching the outer blade cassette 5 to and from the main body 1.

Further, by providing the engaging hook 9 on the inner surface of the outer cutter frame 10, the engaging portion and the holding portion of the outer cutter cassette 5 can be integrally formed. In other words, the engagement hook 9 serves both as the engagement and the holding of the outer cutter cassette 5, so that when the outer cutter cassette 5 is attached to the main body 1, the holding force is improved, and It is possible to prevent rattling.

Further, since the button 8 of the outer cutter cassette 5 is protruded upward D as shown in FIG. 6, the area pressed by a finger increases, and when the outer cutter cassette 5 is detached from the main body 1, ,
The button section 8 can be easily pushed, and the detachability can be improved. Further, the upper end 8a of the button section 8 of the outer blade cassette 5 is provided with a cover piece 40 of the slit blade cassette 32 at the upper end 8a. The lower end 40a is overlapped,
The overlapping portion 30 can prevent swarf from spilling out of the main body 1 to the outside.
It is possible to prevent the cover piece 40 from being damaged due to the finger being hooked on the cover piece 0 and being peeled off.

Further, the side wall 10b of the outer cutter frame 10
Of the outer blade cassette 5 by extending the end of the
Since the extension wall portion 10c facing the end of the outer blade cassette 5 is formed, the play of the outer blade cassette 5 can be further reduced when the outer blade cassette 5 is mounted, and the lateral direction provided on the outer blade cassette 5 can be further reduced. Spills of whiskers from the slit 6 on the rear surface of the outer cutter cassette 5 can be prevented. When the extension wall 10c is provided at both ends of the side wall 10b, the outer blade cassette 5
Spills from both sides can be prevented.

Another example of the engaging bar 7 provided on the outer cutter cassette 5 is shown in FIGS. First, in the example of FIG. 10, the vertical width E of the engagement bar 7 is set to be larger at the center 7a side than at the end 7b, and in the example of FIG. The central portion 7a is larger than the portion 7b. In each case, the outer blade cassette 5
Can be improved, and the stress applied to the engaging bar 7 at the time of attaching and detaching the outer cutter cassette 5 can be dispersed, so that the stress can be prevented from being concentrated on the central portion 7a having a large bending allowance.

In the example of FIGS. 12 and 13, the engagement hook 9
Is set inside the width G of the button portion 8. In this example, as shown in FIG. 13, each inner end 9 e of the pair of front and rear engaging hooks 9, 9 protrudes inward of the longitudinal notch 54 of the outer cutter frame 10, and gap G ₁ between 9 is smaller than the width G of the button portion 8. Thereby, the engagement hook 9 can be located closer to the central portion where the bending allowance of the engagement bar 7 is large, so that the holding force of the outer blade cassette 5 is improved, and when the outer blade cassette 5 is attached and detached. Thus, the attachment and detachment of the outer blade cassette 5 can be performed more smoothly.

FIG. 14 shows an example in which the hook H of the engaging hook 9 is larger at the center 7a of the engaging bar 7 than at the end 7b. Accordingly, when the outer cutter cassette 5 is attached or detached, the central portion 7 having a large bending allowance of the engagement bar 7 is provided.
The hooking amount H of the engaging hook 9 can be increased by a, and the hooking amount H of the engaging hook 9 can be reduced on the end 7b side where the bending allowance is small. Therefore, the engaging force can be improved in the vicinity of the central portion where the bending allowance of the engaging bar 7 is large, so that the holding force of the outer blade cassette 5 to the main body 1 can be reduced without deteriorating the detachability of the outer blade cassette 5. Can be improved.

In the example shown in FIG. 15, the protrusion width J of the engagement hook 9 is shown.
From the center 9a of the engaging hook 9 to the end 9b. Thereby, when the outer cutter cassette 5 is attached or detached, the engaging margin of the engaging hook 9 can be increased in the central portion 9a where the bending allowance of the engaging bar 7 is large, and the holding force of the outer cutter cassette 5 can be improved. In addition, the amount of engagement between the engaging bar 7 and the engaging hook 9 can be reduced on the side of the end 9b where the bending allowance of the engaging bar 7 is reduced, and the attachment and detachment of the outer cutter cassette 5 can be performed more smoothly.

FIGS. 16 to 21 show a case where the mounting height of the outer blade cassette 5 is made variable by sliding the engaging hook 9 up and down. 17 to 19, an outer blade frame 10 is disposed at an upper end of a blade mounting base 65 on the main body 1 side, and a lower outer periphery of the blade mounting base 65 and a front panel 66 are provided.
And a substantially U-shaped switching plate 6 at a position surrounded by
8 is disposed so as to be movable in the vertical direction K. Switching plate 68
A long track-like long hole 69 is provided at both ends of the upper and lower tracks, and a float round boss 71 provided on a slide hook 70 is fitted into the long hole 69 so as to float in the vertical direction. The slide hook 70 protrudes from the upper surface through an opening hole 72 provided in the bottom side portion on the short side of the outer cutter frame 10, and has an upper end below the horizontal slit 6 of the outer cutter cassette 5 shown in FIG. An engaging hook 9 is provided for engaging with the upper surface of the engaging bar 7 located at the portion, so that the outer cutter cassette 5 can be engaged with the main body 1 without rattling on the outer cutter frame 10. Is to be retained. The configurations of the engaging bar 7 and the lateral slit 6 are the same as those in FIG. As a mechanism for sliding the switching plate 68 in the up-down direction K, a rotary switching dial 73 is used.

The switching dial 73 has a front panel 6
6 and is rotatably arranged on the blade mount 65 through the opening 6. The switching dial 73 sandwiches the blade mount 65 in a U-shape and is restricted from moving in the left-right direction, and can only move in the vertical direction K. As shown in FIG. 21, a cam groove 74 eccentric from the rotation center of the switching dial 73 is provided on the inner surface of the switching dial 73. Then, the round boss 175 protruding from the center of the slide hook 70 is inserted into the cam groove 74 through the hole 76 of the switching plate 68. The round boss 175 serves as a cam shaft, and when the switching dial 73 is turned, the distance between the cam groove 74 and the rotation center changes.
Since the slider 75 slides along the cam groove 74, it receives a vertical force due to the eccentricity of the cam groove 74, transmits power to the switching plate 68, and slides vertically.

By rotating the switching dial 73 in this manner, the engaging hook 9 provided on the slide hook 70 moves up and down, thereby moving the outer blade cassette 5 in the up and down direction. The height of the outer blade cassette 5 can be adjusted vertically. Thus, the vertical slide of the outer blade cassette 5 is
The sliding operation is performed by sliding the engaging hook 9 that engages with the main body 1 up and down.
The slide mechanism of the outer cutter cassette 5 can be realized.

The switching dial 73 is provided with another cam groove 77 inside the cam groove 74, as shown in FIG.
And a round boss 81 of a switch cam 80 shown in FIG.
The switch cam 80 has a round hole 82 provided in the blade mount 65.
, And a tip portion of the round boss 81 is engaged with an engagement groove 84 of a cam lever 83 disposed inside the main body 1. The operation of the switching dial 73 is as follows.
Switch cam 80 → cam lever 75 → switch lever 85 →
The structure is such that the amplitude of the inner blade 55 can be controlled by being transmitted to the changeover switch 86.

Next, an example in which the outer blade frame 13 can be moved up and down with respect to the float support frame 12 of the net blade cassette 14 will be described with reference to FIGS.

In the example shown in FIG. 22, in the net blade cassette 14 which can be attached to the outer blade cassette 5 in a freely floatable manner, a vertically elongated groove 15 whose lower side is opened is provided on the inner surface of the inner wall on the long side of the float support frame 12. Have been. On the other hand, a locking rib 16 guided by the vertically long groove 15 is provided on a long side wall of the outer cutter frame 13. By inserting and locking the locking rib 16 into the vertically elongated groove 15 from below, the front and rear positions of the outer cutter frame 13 with respect to the float support frame 12 are determined, and the outer cutter frame 13 is prevented from coming off. When the outer cutter cassette 5 is detached from the main body 1, the outer cutter frame 13 is movable up and down with respect to the float support frame 12. 13
Can move downward along the longitudinal groove 15, so that the outer cutter 3
And the deformation of the outer blade 3 can be prevented. Further, when assembling the net blade cassette 14, the outer rib frame 13 is not detached from the float support frame 12 by the locking ribs 16, so that the assemblability can be improved.

FIG. 23 shows a state in which the lower surface 15b of the vertically elongated groove 15 provided in the float support frame 12 is closed, the locking rib 16 of the outer cutter frame 13 is positioned back and forth in the vertically elongated groove 15, and the vertical guide is provided. Further, the case where the outer blade frame 13 is prevented from coming off is shown. Thus, when the outer cutter cassette 5 is removed from the main body 1 and the outer cutter 3 is pushed downward, the outer cutter frame 13 moves downward with respect to the float support frame 12 and the outer cutter frame 13 moves. 3 can be prevented and the locking rib 1
6 is prevented from falling off from the lower surface 15b of the vertically elongated groove 15, so that the outer cutter frame 13 does not come off the float support frame 12 at the time of assembling, so that assemblability can be improved.

FIG. 24 shows a case where the engaging rib provided on the outer cutter frame 13 is constituted by an E-shaped elastic arm 17 and the elastic arm 17 is engaged with the groove 15 a provided on the float support frame 12. Is shown. Thereby, when the outer cutter cassette 5 is detached from the main body 1, a force acts on the outer cutter frame 13 in a downward direction, and the outer cutter frame 13 is lowered with respect to the float support frame 12,
Further, when the outer cutter 3 is pushed, the outer cutter frame 13 is further lowered from that position, so that the deformation of the outer cutter 3 can be significantly reduced, and the outer cutter frame 13 is attached to the float support frame 12. When the outer blade frame 13 and the float support frame 12 are connected by the elastic arm 17 at the time of attachment, the outer blade frame 13 does not come off from the float support frame 12, so that the assemblability can be improved.

FIG. 25 shows the outer blade 3 of the net blade cassette 14.
When the slit blade 2A that can be floated up and down by the float spring 18 is disposed adjacent to the spring, the spring that receives the end turn 18b of the float spring 18 of the slit blade 2A on the float support frame 12 of the net blade cassette 14. A case where a receiving portion 19 is provided and a tapered portion 20 for guiding is provided around the spring receiving portion 19 is shown. With this structure, an effect of guiding the end winding portion 18b of the float spring 18 into the spring receiving portion 19 is obtained, the assemblability is improved, and the float spring 18 can be prevented from being detached after the bracket is assembled. . Further, since the side portion 21a of the through hole 21 constituting the spring receiving portion 19 has an open shape, the float spring 18 can be positioned and fitted from the side L instead of being fitted from above. As a result, assemblability can be significantly improved.

FIG. 26 shows a case where the end of the float spring 18 has three step structures, the central step 18 a has the narrowest shape, and this is held by the spring receiving portion 19. With this structure, the outer end portion 18 of the float spring 18
c is by engaging the lower surface of the spring receiving portion 19, the float spring 18 is prevented from deviating upward D _1, it is possible to remarkably improve the assembling property.

[0056]

As described above, according to the first aspect of the present invention, there is provided a reciprocating electric shaver in which an outer blade cassette holding a blade head is detachably engageable with a main body. A button for pressing the engaging bar against the outer blade cassette while providing a lateral slit on the bottom side of the short side of the outer blade cassette having a substantially rectangular shape, and making the lower part of the lateral slit an elastic engaging bar. An engaging portion that is elastically locked by the engaging bar when the outer blade cassette is pressed down toward the main body side and is released from the locked state by the pressing of the button portion. Since the hooks are projected, the engaging force of the engaging hooks with the engaging bar can be increased by increasing the engaging width of the engaging hooks with the engaging bar. Even if you do not increase the width of the hook, It is possible to enhance the holding force of the outer cutter cassette when mounted to the cassette, comprising the outer blade cassette to be reliably held stably for a long period of time relative to the body. In addition, since the engaging hook is provided not on the engaging bar but on the main body side, it is not necessary to increase the rigidity of the engaging bar when increasing the engaging force of the outer cutter cassette to the main body. The force for attaching and detaching the cassette to and from the main body can be reduced, and the attaching and detaching operation can be easily performed.

According to a second aspect of the present invention, in addition to the effect of the first aspect, since the engaging hooks are protruded from the inner surface of the outer cutter frame fixed to the main body, the outer cutter frame is used. The engaging portion and the holding portion of the cassette can be integrally formed. Therefore, when the outer cutter cassette is mounted on the outer cutter frame, the holding force of the outer cutter cassette can be improved, and rattling of the outer cutter cassette can be prevented.

According to a third aspect of the present invention, in addition to the effect of the first aspect, the button portion of the outer blade cassette is pushed upward by a finger because the button portion is extended upward, so that the outer blade cassette can be removed. When detached from the main body, the button portion can be easily pressed.

According to a fourth aspect of the present invention, in addition to the effect of the third aspect, the lower end of the molded product constituting the cover piece of the blade head is overlapped with the upper end of the button portion. It is possible to prevent swarf from spilling from the inside of the main body to the outside, and it is also possible to prevent a finger from being caught on the molded product, peeled off, and damaged.

According to a fifth aspect of the present invention, in addition to the effect of the first aspect, the vertical width of the engaging bar is made larger at the center portion side than at the end portion of the engaging bar. The strength of the center portion of the bar is increased, so that the holding force of the outer blade cassette can be improved, and the stress applied to the engaging bar when the outer blade cassette is attached / detached can be dispersed. It is possible to prevent the stress from being concentrated on the central portion where the margin is large.

According to the sixth aspect of the invention, in addition to the effect of the first aspect, the thickness of the engaging bar is made thicker at the center portion side than at the end portion of the engaging bar. The same effect as that of No. 5 can be obtained.

According to a seventh aspect of the present invention, in addition to the effect of the first aspect, the position where the engaging hook is hooked on the engaging bar is located inside the width of the button portion. The engaging hook can be engaged with the engaging bar in the vicinity of the portion pressed by the button, and the attaching / detaching operation of the outer blade cassette by the button portion can be performed more smoothly.

According to the eighth aspect of the present invention, in addition to the effect of the first aspect, the margin of engagement of the engagement hook with the engagement bar is larger at the center portion than at the end portion of the engagement bar. Therefore, the engaging force can be improved in the vicinity of the central portion where the bending allowance of the engaging bar is large, and the holding force of the outer blade cassette to the main body can be improved without deteriorating the detachability of the outer blade cassette. Can be.

According to the ninth aspect of the present invention, in addition to the effect of the first aspect, the projecting width of the engaging hook is reduced from the center to the end of the engaging hook. The holding force of the outer blade cassette to the main body can be improved in the vicinity of the central portion having a large protrusion width, and the smaller the bending allowance of the engaging bar, the smaller the amount of engagement between the engaging bar and the engaging hook. The attachment and detachment of the outer blade cassette can be performed more smoothly.

According to the tenth aspect of the present invention, in addition to the effect of the first aspect, the engaging hook is slidable in the vertical direction of the outer cutter cassette, so that the height position of the outer cutter cassette can be freely adjusted. The height of the blade head can be adjusted, and the mechanism for vertically sliding the blade head can be realized in a space-saving and compact manner.

According to an eleventh aspect of the present invention, in addition to the effect of the first aspect, the end of the side wall of the outer cutter frame is extended substantially at a right angle, and the end of the long side of the outer cutter cassette is connected to the end. Since the extended wall portions are opposed to each other, the ratchet of the outer blade cassette can be further reduced by the extended wall portions. Spills can be prevented by the extension wall.

According to a twelfth aspect of the present invention, in addition to the effects of the first aspect, in addition to the float supporting frame mounted on the outer blade cassette, the outer blade frame supported by the float supporting frame, and the outer blade A net blade cassette consisting of an outer blade attached to the frame was provided, and the outer blade frame was vertically movable with respect to the float support frame, so when the outer blade cassette was removed from the main body, the outer blade was pushed downward. At this time, by moving the outer cutter frame downward with respect to the float support frame, no force is applied to the outer cutter, and deformation of the outer cutter can be prevented.

According to a thirteenth aspect of the present invention, in addition to the effect of the first aspect, a vertical groove is provided in the float support frame, and the front and rear positioning of the outer blade frame is guided by the vertical groove in the outer blade frame. And the locking ribs that prevent the outer blade frame from coming off are provided, so that the locking ribs are guided along the vertically long grooves, so that when the outer blade cassette is removed from the main body, the outer blade is pushed downward. In this case, since the outer cutter frame moves downward with respect to the float support frame, deformation of the outer cutter can be prevented. In addition, when the outer cutter frame is attached to the float support frame, the outer cutter frame does not come off from the float support frame by the locking ribs, so that assemblability can be improved.

According to a fourteenth aspect of the present invention, in addition to the effect of the first aspect, a groove is provided in the float support frame,
Since the outer blade frame is provided with an elastic arm that elastically engages with the groove, the float support frame and the outer blade frame are connected via an elastically deformable arm. When the outer frame is removed from the float frame, the outer frame is automatically lowered by the force acting on the outer frame downward.
Further, when the outer cutter is pushed, the outer cutter frame is further lowered from that position, so that the deformation of the outer cutter can be significantly reduced. Further, at the time of attaching the outer cutter frame to the float support frame, the outer arm frame is not detached from the float support frame by the elastic arm, so that the assemblability can be improved.

The invention according to claim 15 is the invention according to claim 12.
In addition to the effects described above, a slit blade that can be floated up and down by a float spring is disposed adjacent to the outer blade of the net blade cassette, and the end of the float spring of the slit blade is provided on the float support frame of the net blade cassette. Since the spring receiving portion for receiving the portion is provided, and a tapered portion for guiding is provided around the spring receiving portion, when the end of the float spring is fitted to the spring receiving portion, the assembling effect is improved by the guiding effect by the tapered portion, In addition, it is possible to prevent the float spring from coming off after assembly.

The invention according to claim 16 is based on claim 15
In addition to the effects described, the spring receiving portion is formed by a through hole with an open side, so the through hole of the spring receiving portion that receives the float spring of the slit blade that can float up and down has a shape in which the side is opened. By doing so, the float spring can be positioned and fitted from the side instead of fitting from above, and the assemblability can be significantly improved.

The invention according to claim 17 provides the invention according to claim 16
In addition to the effects described above, since a step having a small diameter is formed at the end of the float spring, and the step is held by the spring receiving portion, the float spring is positioned up and down with respect to the spring receiving portion. This can prevent the float spring from coming off in the upward direction, and can significantly improve the assemblability.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an outer cutter cassette and an outer cutter frame showing an example of an embodiment of the present invention.

FIG. 2 is an exploded perspective view illustrating the blade head according to the first embodiment.

FIG. 3 is an exploded perspective view of the same slit blade cassette.

FIG. 4 is an exploded perspective view of the reciprocating electric shaver according to the first embodiment.

FIG. 5 is a side sectional view of the reciprocating electric shaver according to the first embodiment;

FIG. 6 is a front cross-sectional view of the blade head of the above.

FIG. 7 is an exploded perspective view of the blade head.

FIG. 8 is a plan sectional view of a detachable portion of the outer blade frame and the outer blade cassette according to the first embodiment;

FIG. 9 is an exploded side view of the outer cutter cassette and the outer cutter frame of the above.

FIG. 10 is an exploded side view of another example of the outer cutter cassette and the outer cutter frame of the above.

FIG. 11 is a cross-sectional plan view of the outer cutter cassette of the above.

FIG. 12 is an exploded perspective view of another example of the outer cutter cassette and the outer cutter frame of the above.

FIG. 13 is a plan sectional view of another example of the attaching / detaching portion of the outer cutter frame and the outer cutter cassette of the above.

FIG. 14 is a plan sectional view of still another example of the attachment / detachment portion of the outer cutter frame and the outer cutter cassette in the above.

FIG. 15 is an exploded perspective view of still another example of the outer cutter cassette and the outer cutter frame of the above.

FIG. 16 is an exploded perspective view of another embodiment.

17 is a partially exploded perspective view of FIG.

18 is a partially exploded perspective view of FIG.

19 is a partially exploded perspective view of FIG.

FIG. 20 is an exploded perspective view of the same.

FIGS. 21 (a) and (b) are explanatory diagrams of the operation of the switching dial of the above.

FIG. 22 is an exploded perspective view of still another embodiment.

FIG. 23 is an exploded perspective view of still another embodiment.

FIG. 24 is an exploded perspective view of still another embodiment.

FIG. 25 is an exploded perspective view of still another embodiment.

FIG. 26 is an exploded perspective view of still another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Blade head 3 Outer blade 5 Outer blade cassette 5a Short side part 5b Long side part 6 Horizontal slit 7 Engagement bar 7a Central part 7b End part 8 Button part 8a Upper end 9 Engagement hook 9a Central part 9b End part 10 Outer cutter frame 10a Inner surface 10b Side wall 10c Extension wall 12 Float support frame 13 Outer cutter frame 14 Net blade cassette 15 Vertical groove 15a Groove 16 Locking rib 17 Elastic arm 18 Float spring 18a Step 2A Slit blade 19 Spring receiving part 20 Taper portion 21 Through hole 21a Side portion 40 Cover piece 40a Lower end D Upward direction E Upper and lower width of engaging bar F Thickness of engaging bar G Width of button portion H Allowance for engaging hook J Projection width of engaging hook K Vertical direction L side

Claims (17)

[Claims] 1. A reciprocating electric shaver in which an outer blade cassette holding a blade head is detachably engageable with a main body side, and is provided at a bottom side of a short side portion of the substantially rectangular outer blade cassette. A lateral slit is provided, and a lower portion of the lateral slit is formed as an elastic engaging bar, and a button portion for pressing the engaging bar is provided on the outer blade cassette. A reciprocating electric shaver having an engaging hook which is elastically locked by the engaging bar when pressed down and is released from the locked state by the pressing of the button portion. . 2. The reciprocating electric shaver according to claim 1, wherein the engaging hook is formed to project from an inner surface of the outer cutter frame fixed to the main body. 3. The reciprocating electric shaver according to claim 1, wherein the button portion is extended upward. 4. The reciprocating electric shaver according to claim 3, wherein a lower end of a molded product constituting a cover piece of the blade head is overlapped with an upper end of the button portion. 5. The reciprocating electric shaver according to claim 1, wherein the upper and lower widths of the engaging bar are made larger at a central portion side than at an end portion of the engaging bar. 6. The reciprocating electric shaver according to claim 1, wherein the thickness of the engaging bar is thicker at the center portion side than at the end portion of the engaging bar. 7. The reciprocating electric shaver according to claim 1, wherein a position where the engaging hook is hooked on the engaging bar is located inside a width of the button portion. 8. The reciprocating electric shaver according to claim 1, wherein a margin of engagement of the engagement hook with the engagement bar is larger at a center portion than at an end portion of the engagement bar. 9. The reciprocating electric shaver according to claim 1, wherein the protruding width of the engaging hook is reduced from the center to the end of the engaging hook. 10. The reciprocating electric shaver according to claim 1, wherein the engaging hook is slidable in a vertical direction of the outer cutter cassette. 11. The outer wall portion of the outer cutter frame is extended at a substantially right angle to form an extended wall portion facing the end of the longer side portion of the outer cutter cassette. Reciprocating electric razor. 12. A float support frame, comprising: a float support frame that is attached to the outer cutter cassette so as to float freely; an outer blade frame that is supported by the float support frame; and an outer blade that is attached to the outer cutter frame. 2. The reciprocating electric shaver according to claim 1, wherein the outer cutter frame is vertically movable with respect to the frame. 13. The float support frame is provided with a vertically elongated groove, and the outer cutter frame is provided with a locking rib for guiding the outer cutter frame back and forth while being guided by the vertically elongated groove and for preventing the outer cutter frame from coming off. The reciprocating electric shaver according to claim 12, characterized in that: 14. The reciprocating electric shaver according to claim 13, wherein a groove is provided on the float support frame, and an elastic arm is provided on the outer cutter frame for elastically engaging the groove. 15. Adjacent to the outer blade of the net blade cassette,
A slit blade that can be floated up and down by a float spring is provided, and a spring receiving portion that receives the end of the float spring of the slit blade is provided on the float support frame of the net blade cassette. 13. The reciprocating electric shaver according to claim 12, wherein a tapered portion is provided. 16. The reciprocating electric shaver according to claim 15, wherein the spring receiving portion is formed by a through hole having an open side. 17. The reciprocating electric shaver according to claim 16, wherein a step portion having a small diameter is formed at an end of the float spring, and the step portion is held by a spring receiving portion.