JPS5836582A - Electric razor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to an electric shaver.

Conventionally, as shown in Fig. 1, there is an electric shaver in which an inner cutter (2) is provided inward of an outer cutter (1) curved in an octopus shape so as to be able to move back and forth in a straight line. Since it is perpendicular to the inner surface of the outer cutter (1), there is no rake angle, and the cutting edge is duller than K, and the load is greater.

For this reason, as shown in Figure 2, the inner cutter stand (3
) is rotatably provided with an inner cutter body (5) connected to the outer circumference of the inner cutter body (5) with an inner cutter (4) having an angle (θ) with respect to the inner circumference of the outer cutter (1). Development of p. In this case, in order to bring the inner cutter (4) and outer cutter (1) into close contact, one end (6) of the outer cutter (1) is fixed and the other end (7) is fixed.
The outer cutter (1) is supported with approximately play in the direction of curvature (direction of arrow A). That is, the outer blade (1)
is deflected by the contact pressure of the inner cutter (4), but the inner cutter (4)
When it comes into contact with the rotational direction rear II (one end (6) side of the outer cutter (1)), the outer cutter (1) is stretched in the direction of arrow B KI31, and the one end (6) of the outer cutter (1) is fixed. As a result, the braking action applied to the inner blade body (5) at this time is large and durability is poor. Furthermore, the outer cutter (1) is inhibited from freely moving in response to the contact pressure of the inner cutter (4), and its close contact with the inner cutter (4) is poor, resulting in poor sharpness.

The present invention has been made in consideration of these points, and aims to provide an electric shaver that can improve sharpness and smoothly rotate the inner cutter body, thereby increasing durability.

In this invention, one end of the outer cutter is fixed and the other end is supported with approximately play in the curved direction, so that when the outer cutter is operated by the contact pressure of the inner cutter, a braking action occurs on the fixed side. , by deflecting the inner cutter body toward the advancing side of the rotational direction, which is the direction in which the outer cutter is more likely to move due to the contact pressure of the inner cutter body,
The braking force generated on the fixed end of the outer blade is reduced, and as a result, flexibility is restored to the entire outer blade, allowing the outer and inner blades to adhere evenly, thereby increasing sharpness and durability. In addition, there is a process in which the inner cutter changes its contact position with the outer cutter every moment and does not interfere with the outer cutter, and as a result, the outer cutter causes uneven movement on the surface, but the outer cutter has ribs along the curved direction. By forming the outer cutter, the uneven movement of the outer cutter is minimized and the resistance acting between the inner cutter and the outer cutter is further reduced. Since the other end of the outer cutter is supported with some play, it moves freely, but by gradually increasing the thickness of the outer cutter from the free end toward the fixed end, the attachment of the outer cutter becomes easier. In addition to reinforcing the base, the outer cutter is constructed to prevent excessive local curving movement, curve smoothly, and reduce the difference in the amount of deformation between the parts, thereby further reducing friction.

An embodiment of the present invention will be explained based on FIGS. 8 to 7. First, the motor (8) is built in, and the inner blade body (9) is built in.
) is provided with a main body case (b) having a bearing (g) that rotatably supports the main body case (b). The inner cutter body (9) has a plurality of inner cutters (2) extending tangentially to the outer periphery of the inner cutter stand (6) supported by the bearing (6) and attached with screws α◆. is. These inner cutters (2) are urged in the outer circumferential direction by their own elasticity, but the amount of movement in the outer circumferential direction is limited by a screw stopper screwed into the inner cutter base (6). In addition, these inner cutters (2) K are formed with holes to reduce air resistance. The motor (8) and the inner blade body (9) are connected to each other by a pulley (b), a pulley (b), and a belt (to).

Next, an outer cutter case (2) is provided which is resiliently held by locking claws 4 formed on both sides of the main body case (B). This outer cutter case (2) is maintained in a curved shape by forming a lip 4, and when one end (c) of the nine-nine blade (to) is fixed, the other end of the outer cutter (2) is bent in the curved direction. It is supported with some play along the arrow direction (in the direction of the arrow in Figure 4). As shown in Fig. 7, the thickness of this outer cutter is determined to be the thinnest A at the other end W*, and gradually thickens toward the fixed end (C) to a maximum of 1.5 to 2A. ing. The rotational center axis (C1) of the inner cutter body (9) is positioned approximately 0.3 to 0.8 cm on the advancing side and upward in the rotational direction with respect to the curved center axis (Cm) of the outer cutter. It's a shame.

In such a configuration, a swing t (not shown) is turned ON to rotate the motor (8) and rotate the inner blade body (9) to perform a cut. During rotation, there are processes in which the inner cutter 0 is in contact with the outer cutter (0) and in a process in which it is separated from the outer cutter. In the process of contacting the inner cutter), the inner cutter is urged in the outer circumferential direction by its own elasticity, so it comes into close contact with the outer cutter with a rake angle of θ. This gives good sharpness.

When the inner cutter (to) separates from the outer cutter (to), it deviates toward the outer circumference and rotates on a trajectory D as shown in Figure 1, but the amount of movement is limited by the stopper (A). It does not open too far outward, and when it comes into contact with the outer blade again, 1
4 Maintains rake angle and has low friction.

When the inner blade (2) moves on the trajectory D, the inner blade (6)
is supported by the stopper (to), but when the inner cutter (to) is pushed by the outer cutter (to) and moves away from the stopper, the inner cutter (0) is screwed a.
4, the bendable length becomes longer and the spring constant becomes smaller. Therefore, even if the distance from the center of rotation (cl) of the inner cutter body (9) to the outer cutter changes, the change in contact pressure against the outer cutter is extremely small. In particular, one end of the outer blade (2) is fixed and the inner blade (
2), it is pulled in the direction of arrow B and applies a brake to the inner cutter (2), but the inner cutter (2) moves in the direction of rotation where the outer cutter (to) is easy to move along the direction of the arrow. By moving to the side, the braking force applied by the outer cutter to the inner cutter (6) is reduced, and the flexibility is restored to the entire outer cutter (2) and the inner cutter (2) and the outer cutter are made uniform. It is possible to make it come in close contact with the Therefore, sharpness and durability are improved.

In addition, there is a process in which the inner cutter changes its contact position with the outer cutter at every moment and does not interfere with the outer cutter.This causes uneven movement on the surface of the outer cutter. By forming a lip along the curved direction, it is possible to minimize the uneven movement of the outer cutter to the necessary minimum and further reduce the resistance that acts between the inner cutter and the outer cutter. be.

Furthermore, since the outer cutter (2) is supported with some play in the direction of the arrow entry, the outer cutter (2) moves freely from the center of the curved part to the other end (2), but the outer cutter ( By making the thickness of the outer cutter (2) thinner at the other end and gradually thickening toward one end of the fixed side, the outer cutter (2) is reinforced at its mounting base to the outer cutter case (c), and the outer cutter It is possible to prevent excessive local movement of the blade, curve it smoothly, reduce the difference in deformation between parts, and further reduce the frictional force between the outer blade and the inner blade. It is.

As described above, this invention makes it possible to reduce the braking force applied by the outer cutter to the inner cutter by deviating the inner cutter body toward the forward rotational direction with respect to the central axis of curvature of the outer cutter. It is possible to restore flexibility to the entire blade and bring the outer and inner blades into uniform contact, thereby increasing sharpness and durability.In addition, the outer blade has ribs along the curved direction. By forming the outer cutter, the uneven movement of the outer cutter due to interference with the inner cutter can be kept to the necessary minimum, and the resistance acting between the inner cutter and the outer cutter can be further reduced. By setting the thickness to be thinner on the freely movable side and gradually thicker toward one end of the fixed side, the attachment base of the outer cutter to the outer cutter case is reinforced, and the curved deformation movement of the outer cutter is performed smoothly to further reduce friction. This has the advantage of being able to be made smaller.

[Brief explanation of drawings]

Fig. 1 is a partial vertical sectional side view of a conventional example in which an inner cutter that moves linearly reciprocated faces an outer cutter, and Fig. 2 shows a part of a conventional example in which an inner cutter that moves in a rotational motion faces an outer cutter. Longitudinal front view of 3rd
The figures are a vertical side view showing an embodiment of the present invention, FIG. 4 is a vertical front view of the climbing part, FIG. 5 is a perspective view of the outer cutter, and FIG.
The figure is a perspective view showing the mounting structure of the inner cutter, and FIG. 7 is an enlarged cross-sectional view of the outer cutter. 9... Inner blade body, 12... Inner cutter stand, 13... Inner blade,
21...Outer blade case, 22...Rep, 23...Outer blade ls August 25, 1939 Inventor: Yoshikuni Hirot Miya''-
7″p゛1′ Part-1 Figure-1 A, 107 Figure-5

Claims (1)

[Claims] 1. One end of the outer cutter curved in a kamabob shape is fixed to the outer cutter case, and the other end is supported by the outer cutter case with approximately play along the curved surface, and the outer cutter is fixed to the outer cutter case. An inner cutter body is provided which rotates with an axis parallel to the center axis of curvature of the outer cutter, and the center axis of rotation of the inner cutter body is offset toward the advancing side in the rotational direction with respect to the center axis of curvature of the outer cutter. electric razor. 2. One end of the outer cutter, which is curved into a 1-bore shape, is fixed to the outer cutter case, and the other end is supported by the outer cutter case with approximately play along the curved surface, and the central axis of curvature of the outer cutter is fixed. An inner cutter body is provided that rotates meticulously in parallel with the inner cutter body, and the rotational center axis of the inner cutter body is offset toward the rotational direction advancing side with respect to the curved center axis of the outer cutter, and the thickness of the outer cutter is An electric shaver characterized in that the inner blade is thinner on the advancing side in the rotational direction and gradually thickens toward the rear side in the rotational direction. 3. One end of the outer cutter curved into a bob shape is fixed to the outer cutter case, and the other end is supported on the outer cutter case with approximately play along the curved surface, and the curved center axis of the outer cutter is fixed. An inner cutter body is provided which rotates with an axis parallel to the inner cutter body, and the rotational center axis of the inner cutter body is deviated toward the rotating direction advancing side with respect to the curved center axis of the outer cutter, so that the outer cutter is curved. An electric razor characterized by forming ribs along the direction.