JPS6258271B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a reciprocating electric shaver, and more particularly to the structure of a drive element that converts rotational motion of a motor into reciprocating motion of an inner cutter block.

Generally, in a reciprocating electric shaver equipped with this type of driver, it is necessary to press the blade surface of the inner cutter block against the outer cutter of the outer cutter block, so as shown in FIG. Connecting cylinder 31 that accommodates 48
The bush 46 protruding from the lower surface of the inner cutter block 3 is housed in the connecting cylinder 31, and the bush 4
6 is brought into pressure contact with a spring 48, and the inner cutter block 3 is brought into pressure contact with the outer cutter 2b of the outer cutter block 2. However, as seen in the figure, the driver 3 used in the conventional reciprocating electric shaver
0, the connecting tube 31 protrudes above the base plate 32 and the bottom of the connecting tube 31 that supports the spring 48 is located on the base plate 32, so that the inner cutter block 3 and the driver 3 are connected to each other.
A large dimension L ₂ is required between the electric shaver and the base plate 32, which has been an obstacle to reducing the height and miniaturization of the electric shaver. The present invention has been made in view of the above points, and its object is to provide a push-up spring on the drive element to press the blade surface of the inner cutter block to the inner surface of the outer cutter of the outer cutter block. To provide a reciprocating electric shaver that can be housed in the inner cutter push-up spring housing of the shaver, while allowing the necessary dimensions between the inner cutter block and the drive element to be shortened and the total height to be lowered to achieve miniaturization. be.

The reciprocating electric shaver of the present invention includes a housing 1 having a blade holder 40 formed on its upper surface and housing a motor 8 therein, an outer cutter block 2 disposed on the blade holder 40, and a housing 1 having a blade holder 40 formed therein and housing a motor 8 therein; Inner cutter block 3 that is reciprocated and slides into contact with the inner surface of outer cutter 2b of outer cutter block 2
, a driver 30 that connects the inner cutter block 3 and the motor 8 and converts the rotational motion of the motor 8 into a reciprocating motion of the inner cutter block 3; and a driver 30 that supports the driver 30 in the housing 1. A pair of elastic legs 33 provided on both sides of the base plate part 32 of the drive element 30, an inner blade push-up spring storage part protruding below the base plate part 32 of the drive element 30, and an inner cutter block stored in the inner cutter push-up spring storage part. A drive transmission mechanism in which the drive from the motor 8 side is transmitted at a position shifted laterally from the spring 48 for pushing up the inner blade. The drive transmission means is characterized in that the bearing 35 of the base plate portion 32 is formed so that the eccentric shaft 9b is exposed in the direction of the blade, and the drive transmission means is configured as described above. By doing so, the above-mentioned object of the present invention is achieved.

The present invention will be explained in detail below with reference to Examples. As shown in Fig. 2, the reciprocating electric shaver consists of a thin housing 1 whose longitudinal length is much shorter than its height and width, and an outer cutter block 2 attached to the upper part of the housing 1. and an inner cutter block 3 which is reciprocated along the inner surface of the outer cutter block 2, and the outer cutter block 2 is covered with a cap 4. As shown in FIG. 3, the housing 1 is formed by connecting a pair of halves 1a, 1a with screws 5, and contains a circuit block equipped with a storage battery 6, a motor 8, and electronic parts 13 for charging. 12 are accommodated. The storage battery 6, motor 8, plug block 10, and circuit block 12 are electrically connected on a chassis 16 built into the housing 1, and a switch terminal 17 formed at one place on the chassis 16 and a switch that slides up and down on the outer surface of the housing 1 are connected. A contact plate 21 provided on the handle 20 constitutes a switch for opening and closing the power supply circuit including the storage battery 6 for the motor 8. On the other hand, the outer cutter block 2 is
Outer blade frame 2a that can be detachably attached to the upper part
It has a semicylindrical shape in which a thin plate-like outer cutter 2b is attached to the outer blade 2b, and is removed from the housing 1 by pressing an attachment/detachment button 24 protruding from one side of the housing 1. The above-mentioned driver 30 is housed in the housing 1 with both ends fixed to the upper end of the housing 1, and a connecting cylinder 3 is formed in a part of the driver 30.
1 protrudes upward through a central opening 41 of a blade holder 40 on the upper surface of the housing 1, and an inner cutter block 3 is detachably connected to this connecting cylinder 31. This driver 30 has approximately U-shaped elastic legs 33 that exhibit elasticity from both longitudinal ends of a rectangular base plate 32 that exhibits rigidity.
It is made of synthetic resin and has a shape in which the elastic legs 33 extend, and is mounted in the housing 1 by fixing mounting pieces 34 showing rigidity formed at the upper end of each elastic leg 33 to protrusions 42 at both ends of the blade holder 40. Then, the eccentric shaft 9b of the eccentric cam 9a connected to the output shaft of the motor 8 is fitted into the bearing 35 formed on one side of the base plate part 32.
As the motor 8 rotates, the base plate 32 is reciprocated left and right while bending both elastic legs 33. Here, a bearing 35 is formed on the base plate portion 32 so that the eccentric shaft 9b is exposed in the direction of the blade (that is, upward in FIG. 4) to constitute a drive transmission means. On the other hand, as shown in FIGS. 3 to 5, the connecting cylinder 31 is integrally formed on the base plate part 32 with a part of its lower end protruding below the base plate part 32, and has an open top surface and a closed bottom surface. A boss 39 protrudes from the center of the inner bottom surface, and a pair of diametrically opposed pin holes 36 consisting of a round hole and an elongated hole are housed in the peripheral wall. serves as the inner blade push-up spring housing. To explain the positional relationship between the spring 48 for pushing up the inner blade placed in the connecting cylinder 31 and the drive transmission means to which the drive from the motor 8 side is transmitted, as shown in FIG. The drive transmission means to which this is transmitted is located at a position laterally offset from the spring 48 for pushing up the inner cutter. On the other hand, inner cutter block 3
is formed by arranging a large number of inner cutters 3b on an inner cutter frame 3a, and as shown in FIGS. A bush 46 is attached to 45, and as shown in the figure, the bush 46 is made to protrude into the connecting cylinder 31 of the driver 30, and
The pin 45 is fitted into the pin hole 36 to be attached to the driver 30. This pin 45 can move up and down within a certain range within the round hole of the pin hole 36, and the entire inner cutter block 3 can be moved up and down within this range, and the push-up pin 45 fits between the bottom of the connecting cylinder 31 and the bush 46. The inner cutter block 3 is biased upward by the spring 48. A coil spring is used for this spring 48, and the spring 48 is connected to the boss 39 which is fitted into the lower end of the spring 48.
It is positioned at the center of the bottom of the connecting cylinder 31, which serves as an inner cutter push-up spring housing section. in this way,
As shown in FIG.
The length of the electric shaver fits within the space below the base plate part 32, and the length _L1 between the base plate part 32 and the inner cutter block 3 can be shortened accordingly, and the height of the entire electric shaver can be lowered. This can contribute to miniaturization. A dustproof cushion 49 is housed between the periphery of the opening 41 of the blade holder 40 from which the connecting tube 31 projects and the base plate 32, and the blade holder 4
0 is prevented from entering the housing 1. The plug block 10 including the plug blade 11 is housed in one half of the inner bottom of the housing 1, and the button 15 exposed on the bottom of the housing 1 is operated to move the plug blade 11 into and out of the housing 1. and a position where the lower side of the plug protrudes through the opening 19, and opens and closes a plug switch arranged in series with a power switch which is opened and closed by the above-mentioned switch handle 20 in the power circuit of the electric shaver. Then, when the plug blade 11 is projected, the plug switch is opened and the storage battery 6 is charged. Incidentally, in this electric shaver, the outer cutter block 2 is protected by a cap 4 when not in use, and the cap 4 having a shape as shown in FIG. 3 is detachably placed on the housing 1.
The cap 4 is composed of a semicylindrical main body 50 that covers the entire circumference of the outer cutter block 2 and a rear piece 53 that covers the rear surface of the housing 1. As shown in FIG. A protrusion 55 on the rear surface of the housing 1 is fitted into the housing 1, and a protrusion 56 on the front surface of the outer cutter frame 2a and a protrusion 57 on the lower end of the front surface of the main body 50 are engaged with each other, thereby being locked to the housing 1. Furthermore, when the cap 4 is attached, the lower front edge of the main body 50 corresponds to the upper edge of the switch handle 20 in the off position, and if the cap 4 is attached, the switch handle 20 will move upward. It prevents the switch from turning on and prevents the electric razor from accidentally starting when you are carrying it. This cap 4 is equipped with a mirror 60 used for shaving and a brush 61 for cleaning beard debris, and the mirror 60 is attached to the inner surface of the rear piece 53.
The brush 61 is removably housed in a housing portion 59 formed on the inner surface of one side piece 52.

As described above, the present invention stores a push-up spring for press-contacting the blade surface of the inner cutter block and the inner surface of the outer cutter in the inner cutter push-up spring accommodating portion protruding below the base plate of the drive element. Since the drive transmission means to which the drive from the motor side is transmitted is provided at a position shifted laterally from the spring for pushing up the blade, the drive transmission means exists on the side of the part below the base plate part to which the drive from the motor is transmitted. By making effective use of the dead space, the push-up spring storage section can be made to protrude downward from the base plate into this dead space. It can be shortened by the length that protrudes downward from the part, which has the advantage of shortening the distance between the base part and the inner cutter block, allowing the overall height of the electric shaver to be set lower, and contributing to overall miniaturization. . Moreover, since the drive transmission means is constructed by forming the bearing of the base plate so that the eccentric shaft is exposed in the direction of the blade, in other words, since the eccentric shaft is exposed in the direction of the blade, the entire length of the base plate in the thickness direction is This also makes it possible to shorten the overall length of the electric shaver and make it more compact.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view showing a conventional example, Fig. 2 is a perspective view showing an embodiment of the present invention, Fig. 3 is an exploded perspective view of the same, Fig. 4 is a longitudinal sectional view of the same, and Fig. 5 is a sectional view taken along line A-A in Figure 4, and Figure 6 is a cross-sectional view taken along line B in Figure 4.
- It is a cross-sectional view taken along line B, where 1 is the housing, 2 is the outer cutter block, 2b is the outer cutter, 3 is the inner cutter block, and 30
3 is a drive element, 31 is a connecting tube, 32 is a base plate, 33 is an elastic leg, 40 is a blade holder, and 48 is a spring.

Claims (1)

[Scope of Claims] 1. A housing that forms a blade holder on its upper surface and houses a motor therein, an outer cutter block that is placed on the blade holder, and a housing that is reciprocally driven on the upper surface of the blade holder and that moves outside the outer cutter block. An inner cutter block that slides on the inner surface of the blade, a drive element that connects the inner cutter block and the motor and converts the rotational motion of the motor into reciprocating motion of the inner cutter block, and a drive element that supports the drive element in the housing. A pair of elastic legs provided on both sides of the base plate, an inner blade push-up spring accommodating part protruding below the base part of the drive element, and a spring accommodating part stored in the inner blade push-up spring accommodating part to push the blade surface of the inner cutter block out. A drive transmission means is provided, which consists of a spring for pushing up to press against the inner blade surface, and transmits the drive from the motor at a position shifted laterally from the spring for pushing up the inner cutter, and the bearing on the base plate is eccentric. 1. A reciprocating electric shaver, characterized in that the drive transmission means is constructed by forming the shaft so as to be exposed in the direction of the blade. 2. The elastic legs are formed into a substantially U-shape that protrudes downward once from both sides of the base plate and then extends upward, and the upper free end of each elastic leg is fixed to the housing, and the upper free end of each elastic leg is fixed to the housing, and 2. The reciprocating electric shaver according to claim 1, wherein the lower portion protrudes from the lower surface of the substrate between both elastic legs.