JPH04231991A - Electric razor - Google Patents

Abstract

PURPOSE:To smooth the simultaneous use of a net blade and a trimmer blade by constituting the razor so that the net blade, and the trimmer blade supported by a float so that the vertical motion can be executed freely are provided on the upper end and both the blades can come into contact simultaneously. CONSTITUTION:As for a trimmer base 54 attached to a frame 7, the movement to the upper part is limited or a click is given by an engagement of a hook 58 and a stopper 75. Simultaneously, the tip of a float spring 57 comes into contact elastically with the upper face of a root part of a hook 70, by which spring force for energizing the trimmer base 54 to the upper part is given to the frame 7. Therefore, a shaft 71 is positioned on the lower side of a shaft hole 90 provided on a trimmer driver 9, and when a trimmer blade 5 is pressed against the skin, this trimmer blade 5 can sink by a vertical clearance alpha portion of the shaft 71 and the shaft hole 90 against the float spring 57. The trimmer blade 5 slides to the upper part, and fixed by a click in a position where the lower end edge of the hook 58 is detained to the upper end edge of the stopper 75.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric shaver, and more particularly to an electric shaver which is equipped with a net blade and a trimmer blade, and which is capable of applying both types of blades to the skin at the same time.

0002

2. Description of the Related Art There is an electric shaver in which both a net blade and a trimmer blade are arranged at approximately the same height so that both types of blades can be applied to the skin at the same time. An example of the head section 2 is shown in FIG. At the center of the upper opening of the frame 7 formed into a rectangular tube shape, there is an outer cutter 21 having a large number of cutter holes;
A net blade 20 consisting of an inner blade 22 that is in sliding contact with the inner surface of the outer blade 21 is disposed, and the net blade 20 is provided within the opening.
Trimmer blades 5, 5 are disposed on both sides of the blade, respectively. In the figure, 3 is a driver for reciprocating the inner cutter 22, and 38 is a joint connecting the driver 3 and the trimmer blade 5.

[0003] In this electric shaver, as shown in the figure,
The net blade 20 and both trimmer blades 5, 5 can be applied to the skin S at the same time, and when the electric razor is moved in the direction shown by the white arrow in the figure in this state, long hair and curly hair are first cut by the trimmer blade 5. , short hair or hair shortened by cutting with the trimmer blade 5 is cut by the net blade 20.

0004

[Problem to be Solved by the Invention] The trimmer blade in a conventional electric shaver has a fixed vertical position, so when applying both the trimmer blade and the net blade to the skin at the same time, the tip of the trimmer blade and the net blade have to be aligned. The line connecting the two is uniquely determined, and this poses a problem in that it is difficult to move it to match the various uneven shapes of the human skin. Although there are some devices in which the vertical position of the trimmer blade can be switched, the trimmer blade in the switched position is actually the same as in the fixed case, and has the same problem.

The present invention has been made in view of these points, and its object is to provide an electric shaver that allows simultaneous use of a net blade and a trimmer blade simultaneously.

[0006]

[Means for Solving the Problems] The present invention provides an electric shaver that is equipped with a net blade and a trimmer blade at the upper end so that both types of blades can be brought into contact with the skin at the same time. It is characterized by being float-supported so that it can move up and down. According to the present invention, since the trimmer blade moves up and down according to the unevenness of the skin and the pressing force against the skin, it is easy to apply both the trimmer blade and the net blade to the skin.

[0007]

[Example] The present invention will be described in detail below based on the illustrated embodiment. The illustrated example is a reciprocating electric shaver that uses dry batteries as a power source and is waterproof.The overall structure will first be explained with reference to FIG. 1 in the figure is the main body, which includes a cylindrical battery cover 1a with a bottom and a cylindrical upper housing 1b.
and a lid 1d that closes the upper end opening of the upper housing 1b that is oriented diagonally.
A motor 10 is disposed within the upper housing 1b. In addition, a battery storage section 1 is provided at the lower end of the upper housing 1b.
A holder 15 equipped with 3 is connected with screws,
The battery cover 1a covers this holder 15. In the figure, 1c is an accent ring attached to the outer circumferential surface of the upper end of the lower housing 1a, and 16 is an accent ring provided on the holder 15, which engages with the engagement recess 18 on the inner surface of the battery cover 1a under the force of a spring 17. An engaging piece that stops the
1g is a waterproof O-ring.

On the front side of the main body 1, there is a switch handle 60 that can freely slide up and down with respect to the main body 1, a lock handle 61 for locking the upward movement (on operation) of this switch handle 60, and a switch handle. A cam 62 rotates as the cam 60 is moved up and down, and this cam 6
A switch 6 consisting of a contact portion that is turned on and off at 2 is provided.

On the other hand, the head portion 2 provided obliquely on the upper end of the main body 1 includes a rectangular cylindrical frame 7, a net blade 20 disposed in an opening on the upper end surface of the frame 7, and a net blade 20. The inner cutter 22 of the net cutter 20 consists of a pair of trimmer blades 5, 5 arranged on both sides, and the inner cutter 22 of the net cutter 20 consists of an outer cutter 21 and an inner cutter 22 that slides on the inner surface of the outer cutter 21. The motor 10 is connected to the motor 10 via the motor 10. The driver 3 converts the rotational motion of the eccentric shaft 12 with a balancer attached to the output shaft of the motor 10 into reciprocating motion, thereby causing the inner cutter 22 to perform reciprocating motion. 39 in the figure is the inner blade 22
A push-up spring 1e urges the outer blade 21 toward the outer blade 21, and 1e is a dustproof (waterproof)
1f is a holding plate for fixing the packing 1e.

The head section 2 will be explained in more detail. The lower edge of one end of the frame 7 is connected to the main body 1 via a hinge, and a slide button 8 is provided on one surface side so as to be slidable up and down. As shown in FIG. 5, on the inner surface of this frame 7, ribs 72, 73, 74 are provided for guiding the vertical movement of the trimmer blade 5.
a shaft 71 for pivotally supporting a trimmer drive element 9, which will be described later;
A hook 70 for holding the outer cutter 21 and a stopper 75
is formed. In addition, slide button 8
On the side where the slide button 8 is provided, a vertically elongated guide hole is provided between the ribs 73 and 74, and a vertically elongated guide hole is also provided at the shaft 71, and the shaft 71 is provided protruding from the inner surface of the slide button 8. .

On the other hand, the trimmer blade 5 includes a blade base 50, a push-up spring 51, a movable blade 52, a fixed blade 53, a trimmer base 54, and a trimmer driver 9 formed integrally with the trimmer base 54. The trimmer base 54, on which the fixed blade 53, movable blade 52, and push-up spring 51 are attached between the upper edge and the blade base 50, is inserted between the rib 72 of the frame 7 and the inner surface of the frame 7. guide piece 5
5, a guide piece 56 inserted between the ribs 73 and 74, and a float spring 57 and a hook 58 protruding from the guide piece 55. The trimmer driver 9 has a vertically elongated shaft hole 90 through which a shaft 71 is passed, and the upper end thereof is connected to the movable blade 52. The lower end is provided with an engagement groove 91 that engages with the joint 38 for connection with the drive element 3. When the driver 3 is caused to reciprocate, the trimmer driver 9 supported by the shaft 71 via the joint 38 is driven to swing.

The trimmer base 54 attached to the frame 7 in this way is attached to the hook 5 as shown in FIG.
8 and the stopper 75 restricts or clicks the upward movement, and the tip of the float spring 57 comes into elastic contact with the upper surface of the base of the hook 70, so that the trimmer base is fixed against the frame 7. A spring force is provided that biases 54 upwardly. For this reason, the shaft 71 is located below the shaft hole 90 provided in the trimmer driver 9, and when the trimmer blade 5 is pressed against the skin, the trimmer blade 5 resists the float spring 57. It is possible to sink down by the vertical gap α between the shaft 71 and the shaft hole 90.

Note that the trimmer driver 9 is connected to the shaft 71 provided on the slide button 8 on the side where the slide button 8 is disposed.
The trimmer blade 5, which is pivoted, also performs the same movement. Furthermore, when the slide button 8 is slid upward, the trimmer blade 8 is connected to the shaft 71 provided on the slide button 8 and to each guide piece 56 of the trimmer base 54. Since the pin 82 is provided, the trimmer blade 5 also slides upward at the same time, as shown in FIGS. 6 and 7.
When the lower end edge of the hook 58 engages with the upper end edge of the stopper 75, it is click-fixed. At this time, the float spring 57 separates from the hook 70, so the trimmer blade 5 does not float.

The joint 38 that connects the driver 3 and the trimmer driver 9 is provided with engaging portions with the trimmer driver 9 at two locations, upper and lower, and normally the lower engaging portion 38a is connected to the trimmer driver 9. When the trimmer blade 9 moves upward, the trimmer blade 5 is driven in the same manner so that the upper engaging portion 38b is engaged with the engaging groove 91. However, as shown in FIG. 8, since the distance a between the upper and lower engaging portions 38a and 38b is larger than the vertical movement amount b of the trimmer driver 9, that is, the trimmer blade 5 is moved upward. At this time, since the distance D from the part that engages with the joint 38 to the shaft 71 is made shorter, the trimmer blade 5 is moved upward more than when the trimmer blade 5 is positioned downward. The amplitude of the movable blade 52 at is large, and the cutting ability is high.

Note that when the frame 7 is attached to the main body 1 so as to rotate around the point X in FIG.
The presence of the two upper and lower engaging portions 38a and 38b causes a catch between the engaging groove 91 and the frame 7 to become difficult to rotate, but when this is noticeable, the upper engaging portion 38b in the figure It is preferable to set it at a position shifted to the left side.

FIG. 9 shows another embodiment. This uses the force of a push-up spring 39 provided in the driver 3 that pushes the inner cutter 22 of the net cutter 20 toward the outer cutter 21 as the spring force that pushes the trimmer blade 5 upward. A hook 70 for attaching the outer cutter 21 of the net cutter 20 is provided not on the frame 7 but on the trimmer base 54 of the trimmer cutter 5. The force of the push-up spring 39 pushing up the outer cutter 21 via the inner cutter 22 causes the trimmer blade 5 to
This also applies an upward force.

However, on the side where the trimmer blade 5 moves upward by operating the slide button 8, as shown in FIG. When the trimmer blade 5 is moved upward by operating the slide button 8, the trimmer blade 5 is engaged with the outer cutter 21 and the force of the push-up spring 39 is engaged with the outer cutter 21, and when the trimmer blade 5 is moved upward by operating the slide button 8, As shown in b),
The engagement piece 70' is designed to come out upward from the engagement position with the outer cutter 21.

Still other embodiments are shown in FIGS. 11 to 13. This is done by integrally forming a float spring 57 at the lower end of the guide piece 55 of the trimmer base 54, which comes into contact with the upper surface of the spring receiver 77 formed on the inner surface of the frame 7, and
An auxiliary spring 95 that engages with a spring receiver 78 formed on the inner surface of the frame 7 is integrally formed at the lower end of the guide piece 56. In the normal position, the float spring 57
By not only touching the upper surface of the spring receiver 77 without being deformed in any way, but also by inserting the spring receiver 78 into the opening of the auxiliary spring 95 forming an inverted V shape, an upward initial holding spring force is generated. Left and right rattling is eliminated, and when the trimmer blade 5 sinks, a spring force is generated between the float spring 57 and the spring receiver 77 to urge the trimmer blade 5 upward. When the trimmer blade 5 has not sunk in, the deflection of the float spring 57 is made zero, thereby eliminating creep deformation of the float spring 57.

[0019]

As described above, according to the present invention, since the trimmer blade moves up and down in accordance with the unevenness of the skin, it is easy to apply both the trimmer blade and the net blade to the skin. Therefore, simultaneous use of the net blade and the trimmer blade can be performed smoothly and comfortably.

[Brief explanation of the drawing]

FIG. 1 is a cutaway front view of one embodiment of the present invention, (a)
(b) shows the normal state, and (b) shows the floating state.

FIG. 2 is a longitudinal sectional view of the entire electric shaver.

FIG. 3 shows the head part, (a) is a plan view, (b)
) is a front view.

FIG. 4 is a vertical cross-sectional view of the head, showing a state in which the trimmer blade on the right side is floating.

FIG. 5 is a cutaway exploded front view.

FIG. 6 is a longitudinal cross-sectional view with one trimmer blade protruding upward.

FIG. 7 is a cutaway front view with one trimmer blade protruding upward.

FIG. 8 is an explanatory diagram of an engaged state of the trimmer driver and the joint.

FIG. 9 is a cutaway front view of another embodiment.

FIG. 10 is a sectional view showing the supporting state of the outer cutter in yet another example, where (a) shows the normal state and (b) shows the floating state.

FIG. 11 is a cutaway exploded front view of another embodiment.

FIG. 12 is a cutaway front view in a normal state.

FIG. 13 is a front view showing the action of the auxiliary spring.

FIG. 14 is a vertical cross-sectional view of a conventional example.

[Explanation of symbols]

2 Head part 5 Trimmer blade 20 Net blade

Claims (1)

[Claims] [Claim 1] An electric shaver that is equipped with a net blade and a trimmer blade at the upper end so that both types of blades can be brought into contact with the skin at the same time, wherein the trimmer blade is float-supported so as to be movable up and down. An electric razor featuring