JPH0919572A - Reciprocation type electric razor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a float with a smooth touch by arranging a spring receiving part on a base member to hold a mobile blade pushup spring and a spring receiving part to hold a coil spring for the float so that the springs are positioned to overlap each other in the direction of upper and lower floats. SOLUTION: A coarsely shaving blade head 2 of a reciprocation type electric razor has an outer blade 20 as a fixed blade which has a plurality of slit-like blade shaped blade bores to both sides on the top surface thereof, a pair of outer blade holding members 25 and 26 as a base member fixed on both ends along the length of the outer blade 20 and an inner blade 22 as mobile blade kept in sliding contact with the internal surface of the outer blade 20. Pushup springs 24 and 24 are interposed between the top surface of lower pieces of the outer blade holding members 25 and 26 and both end undersurfaces of a slit joint 23. A float spring 27 is mounted from below the blade frame 3. In this case, the upper end of the float spring 27 is so arranged as to come above the lower end of the pushup spring 24 overlapping it by a dimension (a).

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 having a floatable blade.

[0002]

2. Description of the Related Art In recent years, electric razors have been provided in which an outer blade floats up and down for the purpose of improving the feel on the skin and reducing irritation. As one example, JP-A-55
In Japanese Patent Laid-Open No. 86490/86, an inner blade and an inner blade pushing-up spring are incorporated in an outer blade frame to be integrally floated.

In this device, the spring for the outer blade float is constructed independently of the inner blade pushing-up spring, so the float spring can be set relatively freely, so that the float is soft to some extent. A blade head having the same can be configured.

[0004]

However, in the conventional example as described above, since the inner blade pushing-up spring and the float spring are mounted side by side in the vertical direction, a vertical space for mounting the spring is provided. However, since the mounting height of each spring is reduced, the float amount is small and the spring constant is large, resulting in a rugged feel.

Further, since the float spring is incorporated in the main body, it is difficult to remove the outer blade block, which makes it difficult to clean or replace the blade.
Further, as another embodiment, as shown in FIG. 7, there is an elastic molded thin-wall spring 102 provided on the side surface of the blade frame 101. In this one, the blade frame 1
Since the thin spring 102 is provided at 01, the blade can be replaced relatively easily, but due to space limitations, the spring constant is more than double that of the coil spring and the float has a hard feel. In addition to the above, the thin spring 102 of the molded product has a drawback that the shaving blade head 103 itself vibrates up and down during driving because a stable upward pushing load cannot be obtained in the initial state due to creep or the like. There is.

The present invention is intended to solve the above problems, and an object of the present invention is to provide a reciprocating electric shaver in which a float having a smooth feel can be obtained and the blade can be easily removed.

[0007]

In order to achieve the above object, in the invention of claim 1, a spring receiving portion for holding the movable blade pushing-up spring and a spring receiving portion for holding the float coil spring are provided on the base member. It is characterized in that each spring receiving portion is provided so that each spring has a positional relationship such that the respective springs overlap each other in the vertical float direction.

According to a second aspect of the present invention, the spring receiving portion for receiving the lower side of the float coil spring in the first aspect is provided on the blade frame which is detachable from the main body. According to a third aspect of the present invention, in the second aspect, a spring receiving member for holding the lower side of the float coil spring is provided separately from the blade frame, and the blade frame is provided with a hole portion for fixing the spring receiving member. It is a thing.

According to a fourth aspect of the invention, in the third aspect, the protrusion for guiding the float coil spring is arranged on the upper side,
The spring receiving member is configured by disposing a hook portion for fixing to the blade frame on the lower side. According to a fifth aspect of the present invention, in the third aspect, the spring receiving portion of the base member is provided in the extending direction of the hole of the blade frame.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A reciprocating electric shaver according to the present invention is arranged between a pair of finishing shaving blade heads 1 and 1 at an upper end of a main body 5 and both finishing shaving blade heads 1 as shown in FIG. The three shaving blade heads 2 are arranged in parallel and in parallel, and these three blade heads 1, 1, 2 are simultaneously driven by a motor 4. 6 in the figure
Is a trimmer block, and 7 is a switch unit.

Of the blade heads 1, 1 and 2, the finish shaving blade heads 1 and 1 are formed of a thin metal plate as shown in FIG. 2 and have a large number of blade holes formed therein.
0, an outer blade frame 11 that holds the outer blade 10, and an outer blade 10
The outer blade frame 11 comprises a plurality of heat-sealing projections 53 for mounting the outer blade 10 on both outer surfaces along the longitudinal direction, and a smoother 9. And an engaging protrusion 54 that is engaged with the protruding portion 55 and an E-shaped elastic arm 56 are integrally provided on both end surfaces orthogonal to the longitudinal direction. The portion is provided with an engagement protrusion 57. The outer blade 10 is fitted along the upper portion of the outer blade frame 11 by engaging the heat sealing protrusions 53 with the locking holes 51 formed at both ends along the longitudinal direction to heat seal the heat sealing protrusions 53. It can be installed.

The smoother 9 which is floatably attached to the outside of the blade heads 1 and 1 is a plate-like member having a plurality of elastic fins 63 on the upper portion thereof, and an engaging hole 61 provided on the lower portion thereof and an outer portion. Elastic arm 5 on one outer surface of the blade frame 11
By heat-sealing with an attachment projection 59 provided at the tip of the outer blade 8, the outer blade frame 11 is attached in a vertically floatable state. Here, the engagement protrusion 54 is engaged in the engagement hole 61.

As shown in FIG. 4, the rough shaving blade head 2 has an outer blade 20 as a fixed blade having a plurality of slit-shaped blade holes extending to both side surfaces on the upper surface, and both ends of the outer blade 20 in the longitudinal direction. From a pair of outer blade holding members 25 and 26 as base members fixed by heat sealing, an inner blade 22 as a movable blade slidably contacting the inner surface of the outer blade 20, and a slit joint 23 fixed to the inner blade 22. The outer blade holding member 2
Push-up springs 24, 24 as movable blade push-up springs are provided between the upper surfaces of the lower pieces of 5, 26 and the lower surfaces of both ends of the slit joint 23, respectively. The push-up springs 24, 24 are attached to the outer blade holding member 25, by the spring receiving portion.
26 and the slit joint 23, the lower end is fitted to the spring receiving projection 75 protruding from the outer blade holding members 25, 26, and the upper end is located below both ends of the slit joint 23. The spring receiving projection 78 protrudingly provided on the slit joint 23 and the outer blade holding member 25 so as to apply upward biasing force to the slit joint 23.
It is installed between 26 and.

Heat seal holes 8 for the outer blade 20 and the inner blade 22
1 and 80 have a shape that opens to the lower side, and the heat seal protrusions 76 and 79 can be inserted from the lower side as they are during assembly. It is possible to prevent the 20 from being deformed. At this time, the leg portions 82 of the outer blade 20 are fitted into the outer blade guide grooves 77 provided in the outer blade holding members 25 and 26 without rattling, so that sufficient holding force can be secured even in a small number of heat-sealed portions. .

The blade heads 1, 1 and 2 are attached to the upper end of the main body 5 via the blade frame 3 and the sub-frame 8. As shown in FIG. 2, the blade frame 3 is formed in a rectangular frame shape by molding synthetic resin, and has two engaging holes 33 on the outer side and outer blades on the inner side on both longitudinal end surfaces thereof. Two frame guide grooves 31 and one rough shaving blade guide groove 32 are provided in the center, and a protrusion 34 having a locking hole 35 projects inward at the lower end of the center. In addition, guide grooves 40 are respectively provided from below on both end surfaces of the blade frame 3 so as to reach the engaging holes 33.

Assembling the finishing shaving blade heads 1, 1
Engagement protrusions 57 provided at the ends of the elastic arms 56 at both ends
Is attached by being engaged with the engagement hole 33 via the guide groove 40 of the blade frame 3. Also,
On the inner surface side of the blade frame 3, each of the above-mentioned engaging holes 33 is connected to the upper end of a guide groove 40 whose lower end reaches the bottom surface of the blade frame 3, and the position of the engaging protrusion 57 when the finishing shaving blade head 1 is assembled. To guide and make it easier to assemble.

The protrusion 55 provided at the longitudinal end of the outer blade frame 11 is provided with the outer blade frame guide groove 3 provided on the inner surface of the blade frame 3.
It corresponds to No. 1 and positions the outer cutter frame 11 in the front-rear direction and at the same time serves as an upper stopper.
It is a place to receive the pushing force of 2. At this time, the engaging ribs 54 projecting from the side surfaces of the outer blade frame 11 penetrate through the guide holes 62 of the smoother 9 and engage with the guide ribs 38 provided on both side surfaces of the blade frame 3, It is possible to stop looseness in the longitudinal direction of the shaving blade head 1 and the smoother 9.

Next, assembling of the rough shaving blade head 2 is performed by the following procedure as shown in FIGS. An engaging protrusion 71 provided at one end of the shaving blade head 2 projects beyond the width of the shaving blade head 2, and the engaging protrusion 71 is inserted into the guide groove 39 of the blade frame 3 from below. It

By this fitting, the rough shaving blade head 2 is allowed to float while preventing rattling in the longitudinal direction even when the inner blade is driven, and it is possible to prevent adverse effects on skin contact due to unpleasant noise or vibration. ing. Here, the cross-sectional shape of the engaging protrusion 71 is circular, and by engaging this with the guide groove 39 formed of a flat surface only on one side, it is possible to smoothly perform even a float on only one side.

At this time, the outer shaving blade holding members 25, 26 and the guide groove 32 of the blade frame 3 are fitted to each other, whereby the rough shaving blade head 2 is also restricted in the front-back direction. In this state, the rough shaving blade head 2 is attached to the blade frame 3 so as to be movable up and down. Next, in order to apply an urging force from below, a float spring 27 as a coil spring for float and The spring receiving member 28 is attached from below the blade frame 3. The lower end of the float spring 27 is received by a guide portion 83 provided as a protrusion on the spring receiving member 28, and the upper end thereof is fitted to a spring guide protrusion 74 protruding below the outer blade holding members 25 and 26. It

A protrusion 34 extending from the lower side of the blade frame 3
The float spring 27 and the spring receiving member 28 are sequentially inserted into the locking hole 35 as a hole provided in the
The hook portion 84 of the spring receiving member 28 prevents the spring receiving member 28 from coming off. At this time, the spring guide protrusions 74 protruding below the outer blade holding members 25 and 26 are engaged with the locking holes 35.
Since the float spring 27 is provided in the extension direction, the upper end of the float spring 27 is naturally drawn into the spring guide protrusion 74 as a spring receiving portion, which facilitates assembling the float spring 27.

In this state, as shown in FIG. 1, since the spring receiving surfaces of the outer blade holding members 25 and 26 are stepped, the upper end of the float spring 27 is larger than the lower end of the push-up spring 24 in the dimension a in the figure. It overlaps only by the amount and it is on the upper side. As a result, the vertical mounting dimensions of the push-up spring 24 and the float spring 27 can be made large.
The stress can be suppressed to a small value even with respect to the amplitude in the left-right direction of 2, and the float spring 27 can realize a soft float because the float amount of the rough shaving blade head 2 can be increased and the spring constant can be decreased. It gives a smooth skin touch to.

Further, the upper and lower stoppers 72, 73 provided at both ends of the rough shaving blade head 2 are regulated in the downward direction of the rough shaving blade head 2 by the stopper receiving surfaces 41 provided on both sides of the blade frame 3 after assembling. Is for doing. With this, even when the rough shaving blade head 2 is strongly pressed downward, a strong force acts on the float spring 27 to prevent the float spring 27 from being damaged or the spring receiving member 28 coming off. Is.

Here, the upper and lower stoppers 72 on one side
The elastic shape of the shaving blade head 2
This is because it is easy to get over the stopper receiving surface 41 at the time of assembling. The blade frame 3 has hook portions 36, 36 having buttons 37 on the outer surfaces of both ends thereof.

These hook portions 36, 36 are for detachably attaching the blade frame 3 to the sub-frame 8. On the other hand, an eccentric shaft and a pair of driver elements 14 and 15 for converting the rotation of the eccentric shaft into reciprocating motion are connected to the output shaft of the motor 4 disposed inside the main body 5, and the upper surface of the main body 5 is connected. As shown in FIG. 6, the inner blades 12 and 12 of the blade heads 1 and 1 are connected to the driver elements 14 and 15 of which the upper portions protrude.

At this time, the drivers 14, 15 and the inner blades 12, 1
2, push-up springs 19 and 19 for urging the inner blade 12 upward, and a spring stopper 1 for preventing the spring from coming off.
8, 18 and an inner blade joint 13 for connecting the inner blade 12,
13 is provided, and the push-up springs 19 and 19 are the driver elements 1.
It is inserted and attached to the drive pin 92 which is erected on Nos. 4 and 15. The inner blade joint 13 and the inner blade 12 are integrated by a locking hook 91 protruding from the inner blade joint 13. Further, the slit driver 17 is attached to one of the driver elements 14 by the attachment hook 93.
Attached by

The upper portion of the slit driver 17 is engaged with the slit joint 23 of the rough shaving blade head 2. Thus, three blade heads 1, 2 of two kinds are arranged in parallel and in parallel, and a pair of blade heads 1, 1 suitable for finish shaving are arranged on both sides of the blade head 2 suitable for rough shaving. In the reciprocating electric shaver, if the motor 4 is driven,
The rotation of the motor 4 is converted into reciprocating motion by the drivers 14 and 15, and the reciprocating motion reciprocally drives the inner blades 12 and 12 of the finishing shaving blade heads 1 and 1 and the inner blade 22 of the rough shaving blade head 2. It is a thing. In addition, these blade heads 1, 1, on the skin
When 2 is pressed, the finishing shaving blade head 1 floats because the elastic arm 56 in the outer blade frame 11 bends,
The shaving blade head 2 floats as the float spring 27 bends.

[0028]

According to the first aspect of the present invention, the base member is provided with the spring receiving portion for holding the movable blade pushing-up spring and the spring receiving portion for holding the float coil spring, and the respective springs overlap in the vertical float direction. Since each spring receiving portion is arranged so as to have a positional relationship such as that, it is possible to take a large space in the vertical direction of the spring, and the float amount is large without increasing the overall size, A float with a low spring constant and a smooth feel can be obtained.

According to a second aspect of the present invention, in the first aspect, the spring receiving portion for receiving the lower side of the float coil spring is provided in the blade frame which is detachable from the main body.
In addition to the above effect, the blade portion can be easily attached and detached by cleaning or exchanging the blade. According to a third aspect of the invention, in the second aspect, the spring receiving member for holding the lower side of the float coil spring is provided separately from the blade frame, and the blade frame is provided with the hole portion for fixing the spring receiving member. Two
In addition to the above effect, the spring receiving member can be fixed after the spring is inserted from the lower side of the hole portion, and the float coil spring can be easily and surely attached.

According to a fourth aspect of the invention, in the third aspect, the protrusion for guiding the float coil spring is arranged on the upper side, and the hook portion for fixing to the blade frame is arranged on the lower side to constitute the spring receiving member. Therefore, in addition to the effect of claim 3, a large spring guide portion can be secured, and even when the spring is bent, the spring can be securely held without buckling. .

According to the invention of claim 5, the spring receiving portion of the base member is provided in the extending direction of the hole of the blade frame in claim 3, so that in addition to the effect of claim 3, the spring is inserted into the hole. At times, it is possible to automatically fit into the spring receiving portion of the base member and easily assemble without the need for positioning.

[Brief description of the drawings]

1A and 1B show an example of the present invention, in which FIG. 1A is a partially cutaway front view, and FIG. 1B is a plan view with a blade frame omitted.

FIG. 2 is an exploded perspective view of the same, partially broken away.

FIG. 3 is an exploded perspective view for explaining installation sites of the movable blade pushing-up spring and the float coil spring of the above.

FIG. 4 is an exploded perspective view of the above rough shaving blade head.

FIG. 5 is an exploded perspective view showing an inner blade of the above with a part thereof omitted.

FIG. 6 is a side sectional view of the above.

FIG. 7 is an exploded perspective view showing a conventional example.

[Explanation of symbols]

 20 Outer Blade 22 Inner Blade 24 Push-up Spring 25 Outer Blade Holding Member 26 Outer Blade Holding Member 27 Float Spring 28 Spring Receiving Member 74 Spring Guide Protrusion 75 Spring Receiving Protrusion 78 Spring Receiving Protrusion

Claims (5)

[Claims] 1. A reciprocating electric shaver in which a fixed blade, a movable blade, and a movable blade push-up spring are integrally block via a base member to support a blade frame to float freely on a blade frame. A spring receiving part for holding the push-up spring and a spring receiving part for holding the float coil spring are provided, and the spring receiving parts are arranged so that the respective springs have a positional relationship such that they overlap in the vertical float direction. A reciprocating electric razor characterized by being made. 2. A reciprocating electric shaver according to claim 1, wherein a spring receiving portion for receiving a lower side of the float coil spring is provided on a blade frame which is detachable from the main body. 3. The spring receiving member for holding the lower side of the float coil spring is provided separately from the blade frame, and the blade frame is provided with a hole for fixing the spring receiving member. Reciprocating electric razor. 4. A spring receiving member is configured by arranging a protrusion for guiding a float coil spring on an upper side and a hook for fixing to a blade frame on a lower side. Reciprocating electric razor described in 3. 5. The spring receiving portion of the base member is provided in the extending direction of the hole portion of the blade frame.
Reciprocating electric razor as described.