JPS635789A - Reciprocal 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] 【Technical field】

The present invention relates to a reciprocating electric shaver, and particularly to the structure of a driver that converts rotation of a motor into reciprocating motion.

[Background technology]

In recent years, a driver 1 shown in FIG. 15 has been widely used in reciprocating electric shavers. The driver 1 here has an inverted U-shape and thin elastic pieces 10.1 extending from both ends.
0 is extended, and each tip of these elastic pieces i o and i o is fixed to the housing 2, and the inner cutter block 3 is connected to a boss 11 protruding from the central upper surface, and an elastic arm 12 is further protruded from the inner surface. Eccentric pin 4 attached to the output shaft of motor 4
0, and for the motion component in the direction perpendicular to the plane of the drawing in the rotation of the eccentric pin 40, the elastic arm 1
This is absorbed by the bending of the inner cutter block 3, and the inner cutter block 3 reciprocates by following this while bending both elastic pieces 10 and 10 for the movement component in the left and right directions in the figure. 5 in the diagram
is the outer blade. However, in this configuration, since the entire driver element 1 reciprocates in the same phase, the vibration is relatively large.
Furthermore, there is a problem in that the width becomes wider due to the extension of the pair of elastic pieces 10 and 10, and for this reason, the driver 1 of the form shown in FIG. 16 and subsequent figures has been revised. . This drive element 1, which is called a lever type drive element, is supported at its vertical center by a pin 20 and is rotatable, and has an inner cutter block 3 connected to its upper end.
The engagement groove 13 at the lower end is connected to the eccentric pin 40 attached to the output shaft of the motor 4, and the movement component in the left and right direction in FIG. The inner cutter block 3 is caused to perform a reciprocating motion by performing the swinging motion, and the movement components in other directions are absorbed by sliding the eccentric pin 20 within the engagement groove 13. It is. In this case, the width of the drive element 1 is not required, making it easier to manufacture a narrower electric shaver compared to the one using the drive element 1, and the upper and lower parts of the drive element 1 are separated from each other on both sides. Since the motion in the directions is in reverse phase, it has the advantage of less vibration. However, as shown in FIGS. 17 and 18, the engagement [13] must be long in the direction perpendicular to the direction of mechanical movement of the inner cutter block 3, and the eccentric pin 40 must be inserted into this engagement groove. 13, there is a problem in that noise is generated at the engagement portion between the eccentric pin 40 and the engagement groove 13.

[Purpose of the invention] The present invention has been made in view of these points, and its object is to provide an electric shaver with less vibration and V-noise. [Disclosure of the invention]

Therefore, the present invention includes a driver in which the inner cutter block is connected to the upper part and an eccentric pin rotated by a motor is connected to the lower part, and the inner cutter block is reciprocated by the swinging of the driver. In an electric shaver, an engaging hole with which the eccentric pin engages is provided at the bottom of the driver element, and the opening between the swing support part of the driver element and the retaining hole is made in the same direction as the axial direction of the swing of the driver element. In moving the inner cutter block in the opposite direction to the lower end by swinging the driver as the eccentric pin rotates, The unnecessary movement direction component of the eccentric pin is absorbed by the bending of the bending piece provided on the driver. The present invention will be described in detail below based on the illustrated embodiments.
Figures 5 to 5 show an embodiment of the present invention, in which a motor 4 with an eccentric pin 40 mounted inside a housing 2 to which an outer cutter 5 is attached via an outer cutter frame 50;
In Figure 6, where the drive element 1 is installed, 21 is a retaining ring to prevent the drive element 1 from being removed from the pin 20, 51 is a retaining pin for the outer blade 7 frame 50, and 52 is a retaining ring for the pin 51. It is a biasing spring. The drive element 1 is vertically long in the form of a rod, and its central portion in the vertical direction is pivoted by a pin 20 protruding from the inner surface of the housing 2. The drive element 1 has an inner cutter block 3 at its upper end.
It has a mounting hole 16 for connection, and has an engagement hole 14 at the lower end into which the eccentric pin 40 is inserted, and furthermore, the center part and the lower end part are integral with these and are located on both ends of the pin 20 in the sleeve direction. It is said that it is connected by a pair of thin flexible pieces 15 and 15. The drive element 1 formed in this way and the inner cutter block 3 are connected by inserting the slider 34 connected to the base 30 of the inner cutter block 3 by the glazed pin 33 and the push-up spring 31 into the mounting hole 16. This is done by placing the upper dome pin 33 through a notch formed in the edge of the mounting hole 16. Now, in this electric shaver, when the eccentric pin 40 is rotated by the soter 4, the mech 1 swings around one pin 20, which is similar to the conventional example, but the inner cutter block 3 The motion component of the eccentric pin 40 in a direction other than the direction in which it reciprocates is absorbed by the deflection of the deflection piece 15.15, as is clear from Figure @4. Incidentally, as is clear from FIG. 5, the engagement hole 14 with which the eccentric pin 40 engages has a downward direction only in the swinging direction of the driver element 1 in order to allow the driver element 1 to tilt with respect to the eccentric pin 40. It has a widening taper. WIJ6 to FIG. 9 show other embodiments, in which a hinge piece 17 is further provided in the drive element 1 shown in the above embodiment. - this hinge piece 1 located between the pair of flexible pieces 15.15 and the lower end in which the engagement hole 14 is provided;
7 allows the lower end of the drive element 1 to bend in the swinging direction, and when the eccentric pin 40 swings left and right, the hinge piece 17 bends, so that the eccentric pin 40 engages with the hinge piece 17. There is no need for the hole 14 to have a taper, which results in even less noise generation than that shown in the above embodiment. Still other embodiments are shown in FIGS. 9 to 11J11. This is because, while the driver 1 in the previous embodiment was pivotally supported by the pin 20, a fixed piece 18 is provided that passes through the opening of the flexible piece 15 and 15 of -U, and both ends are fixed to the housing 2. Between the fixed piece 18 and the upper part of the driver 1,
A hinge piece 19 that can be bent in the same direction as the hinge piece 17
As the eccentric pin 40 rotates, the drive element 1 swings by bending the hinge piece 19. Another embodiment is shown in FIGS. 12 to 14. This is basically the same as the embodiment shown in FIG. 9, except that two pairs of left and right bending pieces 15.
There is also a hinge piece I between the inner blade mounting boss 11 and the bending piece 15°15 of each village.
A, I A is different in that A is provided. Hinge piece 1
7,19. IA bends as the drive element 1 swings, and the bending piece 15 bends to absorb unnecessary movement direction components in the eccentric pin 40. In the above two embodiments, although there is no pivoting pin 20, the upper end of the driver 1 to which the inner cutter block 3 is connected and the lower end of the driver 1 to which the eccentric pin 40 is connected are in opposite phase. The point that moves with is the same as when pivoted with pin 20,
Also, for this reason, it is different from the conventional example shown in Fig. 156.

【Effect of the invention】

As described above, in the present invention, the drive element is swung with the rotation of the eccentric pin engaged with the lower end of the drive element, and the inner cutter block connected to the upper part of the drive element is connected to the lower end. When moving in the opposite direction, by bending the flexible piece provided on the drive element, unnecessary movement direction components in the rotation of the eccentric pin are absorbed. There is no need to form a groove on which the eccentric pin slides, and therefore, it is possible to suppress the generation of noise at the engagement portion between the eccentric pin and the driver,
Since the upper end portion and the lower i portion of the driver move in opposite phases, there is little vibration, and an electric shaver that is comfortable to use can be provided.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view of one embodiment of the present invention, Fig. 2 is a longitudinal cross-sectional view of the same as above, Fig. IJS3 is a cross-sectional view of the same as above, Fig. 4 is a cross-sectional view showing the deflection of the bending piece as above, tJS5 The figure is a vertical sectional view showing the swinging of the driver element as above, FIG. 6 is an exploded perspective view of another embodiment, FIGS. 7 and 8 are longitudinal sectional views of the same, and FIG. 9 is a further embodiment of another embodiment. An exploded perspective view of an example, FIGS. 10 and 11 are longitudinal cross-sectional views of the same, FIG. 12 is an exploded perspective view of another example,
PtSi2 and FIG. 14 are longitudinal cross-sectional views of the same as above, FIG. 15 is a longitudinal cross-sectional view of the conventional example, FIG. 16 is a vertical cross-sectional view of yet another conventional example, and FIG. 17 is a perspective view of the driver of the same as above. FIG. 18 is a cross-sectional view of the same as above, in which 1 is an i mover, 2 is a housing,
3 is an inner cutter block, 14 is an engagement hole, 15 is a bending piece, 17
．． 19. IA indicates a hinge piece, and 18 indicates a fixed piece. Agent Patent Attorney Mr. Ishi 1) 7Figure 2Figure 3Figure 4Figure 5Figure 7Figure 8Figure 10Figure 13Figure 14Figure 15Figure 17Figure 18

Claims (6)

[Claims] (1) An electric shaver that is equipped with a driver in which an inner cutter block is connected to the upper part and an eccentric pin that is rotationally driven by a motor is connected to the lower part, and the inner cutter block is driven back and forth by the swing of the driver. In this case, an engaging part with which the eccentric pin engages is provided at the lower part of the driver, and a deflection in the same direction as the axial direction of the rocking of the driver is provided between the swinging support part of the driver and the engaging part. A reciprocating electric shaver characterized by being provided with a flexible piece that is said to be flexible. (2) The reciprocating electric shaver according to claim 1, wherein the flexible piece is integrally formed with the driver. (3) The reciprocating electric shaver according to claim 1, wherein the swing support portion is supported by a pin protruding from the housing. (4) The reciprocating electric shaver according to claim 1, further comprising a hinge piece that can be bent freely in the swinging direction of the drive element between the flexible piece and the engaging part. (5) The reciprocating electric shaver according to claim 1, wherein the swing support portion is a hinge piece integrally formed with the driver. (6) The reciprocating electric shaver according to claim 1, wherein the flexible pieces are provided in pairs in the swinging direction.