JP3481043B2 - Electric razor - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an electric shaver, and more particularly to an electric shaver in which an outer blade frame is detachably attached to a front end of a case. 2. Description of the Related Art A conventional electric razor shown in FIG. 1 has an outer blade frame 2 detachable so that shavings attached to an outer blade and an inner blade can be easily cleaned after shaving. It is attached to Case 1. This electric razor can remove the outer blade frame 2 from the case and clean the shavings attached to the inner blade and the outer blade. The case 1 is provided with a stopper 4 for mounting the outer blade frame 2 at a fixed position. The stoppers 4 project elastically from both sides of the case 1 to the inner surface of the outer cutter frame 2. The outer cutter frame 2 is provided with a hook 5 at a portion where the stopper 4 is projected. When the outer cutter frame 2 is mounted on the case 1, the stopper 4 is elastically pressed by the hook portion 5, so that the outer cutter frame 2 is prevented from coming off. When the outer cutter frame 2 is detached from the case 1, the stopper 4 is pushed in by the outer cutter frame 2. In the electric shaver having this structure, the outer blade frame 2 can be easily attached to and detached from the case 1, and the outer blade frame 2 can be mounted at a fixed position. In addition, the electric razor shown in FIG. 1 is provided with an opening 2 a in the outer blade frame 2 for inserting a sharp blade 6. The electric razor having this structure allows the sharp blade 6 to approach the outer blade 3. The electric razor in which the sharpening blade 6 approaches the outer blade 3 has a feature that both the sharpening blade 6 and the outer blade 3 can be applied to the skin and shaved conveniently. In the electric razor shown in FIG. 1, the strength of the outer blade frame 2 is reduced at the opening 2a of the sharp blade 6. For this reason, when both sides of the outer cutter frame 2 are elastically pressed by the stopper 4, the outer cutter frame 2 is deformed, and there is a disadvantage that a gap is easily formed between the outer cutter frame 2 and the case 1. Outer blade frame 2 and case 1
If there is any gap between them, the case 1 which is slightly vibrated by the reciprocating inner blade collides with the outer blade frame 2 and causes noise. The outer cutter frame 2 and the case 1 are formed with extremely high precision in order to reduce noise. Even if the molding is performed with high precision, noise is generated when the outer cutter frame is deformed over time. In addition, when the gap between the outer cutter frame and the case is widened, the outer cutter frame is easily detached from the case. Also, if there is a gap between them and play is possible, the image will be a low-quality electric shaver. [0005] In order to reduce this adverse effect, it is necessary to form the outer blade frame thickly, and further, to mold it with strong plastic. When the outer cutter frame is thickened, the manufacturing cost is increased, the weight is increased, and in addition, there is a disadvantage that a neat and beautiful design cannot be obtained. Also, the use of tough plastics has the disadvantage of increasing raw material costs. [0006] The present invention has been developed with a view to solving such a drawback. An important object of the present invention is to provide an electric shaver that has a very simple structure, effectively prevents deformation of the outer cutter frame, and prevents a gap from being formed between the outer cutter frame and the case. [0007] An electric razor according to the present invention comprises an outer blade frame 2 having an opening 2a into which a sharp blade 6 is inserted, which is detachably attached to the tip of a case 1. I have. On both sides of the case 1 are provided stoppers 4 elastically protruding inside the outer cutter frame 2. Further, in the electric shaver of the present invention, a hooking rib 9 and a guide rib 10 are provided on the outer cutter frame 2 and the case 1 in order to prevent the outer cutter frame 2 from being pressed and deformed by the stopper 4. Hooking rib 9, the inner surface of the outer cutter frame 2, along the open mouth 2a, it is provided to extend in the eject direction of the outer cutter frame 2. The guide rib 10 is provided on the case 1 and is located at a position where the guide rib 10 is hooked on the hook rib 9 of the outer cutter frame 2 to prevent the outer cutter frame 2 from being pressed by the stopper 4 and being deformed in the direction in which the opening 2a expands. It is provided in. An embodiment of the present invention will be described below with reference to the drawings. However, the following examples illustrate an electric shaver for embodying the technical idea of the present invention, and the present invention does not specify the electric shaver as follows. Further, in this specification, in order to make it easy to understand the claims, the numbers corresponding to the members shown in the embodiments will be referred to as "claims" and "claims". In the column of “means”.
However, the members described in the claims are not limited to the members of the embodiments. The electric razor shown in FIGS. 2 and 3 has an outer blade frame 2 detachably mounted on the upper end of a case 1. The outer cutter frame 2 has the outer cutter 3 attached in an arched shape.
The outer blade 3 is a thin metal plate having a number of shaving holes. The case 1 is provided with a stopper 4 projecting on both sides and elastically projecting inside the outer cutter frame 2. The stopper 4 holds the outer cutter frame 2 set at the tip of the case 1 at a fixed position. When the outer cutter frame 2 is forcibly pulled out, the stopper 4 is elastically pushed. The stopper 4 is elastically pressed by a pressing spring 7 and protrudes from both sides of the case 1 as shown in a sectional view of FIG. The stopper 4 has a flange 4a at the rear end. The flange 4 a is caught by the opening of the case 1 and prevents the stopper 4 from jumping out of the case 1. The tip of the stopper 4 is the outer blade frame 2
Is shaped like a chevron so that it can be attached and detached smoothly. An upper end of the case 1 is provided with a step portion 1a for mounting the outer blade frame 2. The outer cutter frame 2 has a stepped portion 1a.
Attached to. As shown in FIGS. 2 and 4, a locking portion 8 of the stopper 4 is provided on the inner surface of the outer cutter frame 2. When the outer cutter frame 2 is mounted on the case 1, the stopper 4 is inserted into the locking portion 8 of the outer cutter frame 2, and the outer cutter frame 2 is held at a fixed position of the case 1. The outer blade frame 2 is mounted on the upper part of the case 1, and the upper edge of the case 1 is provided with a sharp blade 6. A portion 2a is provided. The outer blade frame 2 provided with the large opening 2a is easily deformed when pressed by the stopper 4. In order to prevent deformation of the outer cutter frame 2, a hook rib 9 is provided on the outer cutter frame 2, and a guide rib 10 is provided on the case 1. The hooking rib 9 is, as shown in FIGS.
Along the opening 2a of the sharp blade 6, it extends in the attaching / detaching direction of the outer blade frame 2, further protrudes from the inner surface of the outer blade frame 2, and is provided integrally with the outer blade frame 2 made of plastic. Can be The guide rib 10 is provided at a position where the outer cutter frame 2 is prevented from being deformed by being pressed by the stopper 4, that is, located on both sides of the case 1 than the hooking rib 9, and protrudes from the surface of the step portion 1 a. The guide rib 10 is provided integrally with the plastic case 1. Guide rib 10
When the outer cutter frame 2 is mounted on the case 1,
Are provided in parallel with the hooking rib 9 so as to slide along it. The outer cutter frame 2 shown in the figure has openings 2a of sharp blades 6 on both side surfaces, and both surfaces have the same shape.
The outer blade frame 2 of this shape is the case 1
Can be attached to The outer cutter frame 2 having the openings 2a of the sharp blade 6 on both sides is provided with hooking ribs 9 on both sides, and the guide rib 10 on which the hooking ribs 9 are hooked on both sides is a case 1.
At the step portion 1a. However, the electric razor of the present invention does not necessarily need to provide openings for sharp blades on both sides of the outer blade frame. The outer blade frame provided with a sharpening blade opening on one side has hook ribs integrally molded on both sides of the sharpening blade opening, and a guide rib is integrally molded with the case at the position where this hooking rib is hooked I do. When the sharp blade 6 provided at the upper end of the case 1 is not used, as shown in FIG.
Is folded along. When the sharp blade 6 is used, it is raised almost vertically from the case 1 as shown in FIG. The mechanism for tilting the sharp blade 6 is shown in FIGS. The sharp blade 6 shown in this figure is opened and closed by an opening / closing link 11 attached to the case 1 so as to be able to move up and down. When the opening / closing link 11 is lowered, the sharp blade 6
When the opening and closing link 11 is raised, the sharp blade 6 is opened from the case 1. The opening / closing link 11 is moved up and down by a switch knob 12. The electric shaver shown in the figure is provided with a switch knob 12 that can slide up and down in three stages on the front of the case 1. The switch knob 12 is provided so as to be slidable on the surface of the case 1. When the switch knob 12 is raised, the opening / closing link 11 is raised and the sharpening blade 6 is opened. When the switch knob 12 is slid downward, the opening / closing link 11 is pulled down and the sharpening blade is pulled. 6 is folded. Further, the electric razor is placed in the case 1,
As shown in FIG. 3, a mechanism for reciprocating the inner blade 16 is incorporated. FIG. 3 shows a state where the case 1 is opened. The electric razor shown in the figure includes a case 1, a battery 13, a motor 14 driven by the battery 13, a vibrator 15 vibrated by the motor 14, and an inner blade 16 attached to the tip of the vibrator 15. And The case 1 is made of plastic and formed into a shape that can be divided into two parts. The case 1 formed by dividing into two has a peripheral wall 17 of the same shape on the outer periphery, and the peripheral wall 17 is connected to form the case 1 having a closed structure. In order to connect the two divided cases 1, the case 1 is provided with boss holes 18 to be screwed to upper two places and lower two places. The other case (not shown) connected to the case 1 in this figure has a through hole formed at the position of the boss hole 18 to allow a set screw to pass therethrough. The set screw is screwed into the boss hole 18 from the through hole and connects the two divided cases 1. The vibrator 15 to which the inner blade 16 is connected is connected via a connecting rod 19 to a camshaft 20 fixed to the rotating shaft of the motor 14. When the motor 14 is rotated, the vibrator 15 is reciprocated by the camshaft 20 and the connecting rod 19. The electric razor of the present invention has an extremely simple structure and can effectively prevent deformation of the outer cutter frame. For this reason,
Even if the outer cutter frame is pressed by the stopper, there is an excellent feature that a gap between the outer cutter frame and the case can be reliably prevented for a long period of time. This has a feature that a play can be made between the outer cutter frame and the case, and noise can be effectively prevented from being generated by the inner cutter vibrating due to the play. It is very difficult for an electric shaver that vibrates the inner blade to prevent noise from being generated for a long period of time. In particular, an electric razor provided with a large opening for inserting a sharp blade into the outer cutter frame does not have sufficient strength of the outer cutter frame and is easily deformed by being pressed by a stopper. The electric shaver of the present invention has a very simple structure in which a hooking rib is provided on an inner surface of an outer cutter frame and a guide rib is provided on a case. Is effectively prevented from occurring. Also, since there is no play between the outer cutter frame and the case, there is a feature that the outer cutter frame can be accurately mounted at a fixed position of the case without rattling. Further, the electric razor of the present invention has a feature that the play with the case can be reduced without forming the outer blade frame thickly and without specially forming the tough plastic. For this reason, there is a feature that the outer cutter frame can be mass-produced at low cost and can be reduced in weight.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing a conventional electric shaver. FIG. 2 is a front view showing a state in which an outer blade frame of an electric shaver according to an embodiment of the present invention is removed. FIG. 4 is a plan view showing a state in which the case of the electric shaver of the embodiment is opened. FIG. 4 is a perspective view showing a state in which an outer blade frame of the electric shaver of the embodiment of the present invention is removed. FIG. FIG. 6 is a side view showing the razor with its razor blade opened. FIG. 6 is a partially sectional side view showing the razor with its razor blade closed. FIG. 7 is an electric razor shown in FIG. 1. Partial cross-sectional side view showing a state in which the blade is open [Description of References] 1 ... Case 1a ... Stepped portion 2 ... Outer blade frame 2a ... Opening 3 ... Outer blade 4 ... Stopper 4a ... Flange 5 ... Hook Part 6: Cutting blade 7 ... Press spring 8 ... Locking part 9 ... Hook rib 10 ... Guide rib 11 ... Opening / closing link 1 ... Switch hysterectomy 13 ... battery 14 ... Motor 15 ... oscillator 16 ... inner cutter 17 ... peripheral wall 18 ... boss holes 19 ... connecting rod 20 ... cam shaft

Claims (1)

(57) [Claims] [Claim 1] A sharp blade (6) is inserted into the tip of the case (1).
An outer blade frame (2) having an opening (2a) into which the outer blade frame (2) is inserted is detachably mounted.On both sides of the case (1), a stopper ( in the electric shaver 4) is provided, the outer cutter frame (2) along the open mouth (2a), the outer cutter frame (2) hooking rib on the inner surface extends in the eject direction of the (9) When the hook (9) is hooked on the case (1), the outer blade frame (2) is pressed by the stopper (4) and deformed in a direction in which the opening (2a) is expanded. An electric razor having a guide rib (10) for preventing the occurrence of an electric shock.