JPH0822344B2 - Electric razor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an electric shaver having a side cutter,
The present invention relates to a drive mechanism for connecting the side cutter to a motor built in a main body case when the side cutter is used.

(B) Conventional technology In Japanese Utility Model Publication No. 61-36220, a main body case with a built-in motor, and a vibrating blade unit pivotally attached to the main body case so as to stand up and down and projecting a joint for blade drive, A slide plate slidably attached to the main body case for rotating the vibrating blade unit from its inverted position to its upright position, a cam attached to the rotary shaft of the motor, and swingable on the slide plate. Has a cam fitting portion that fits in the cam only when the slide plate is moved to a position where the vibrating blade unit is erected upright, and a fitting fitting portion that fits in the fitting of the vibrating blade unit. In an electric shaver in which a blade of a vibrating blade unit is driven by swinging a swinging arm having a swing arm, the swing arm and a fixing portion on the main body case side facing the swing arm. On one side, and on the other side, a projection that fits to the projection only when the slide plate is moved to a position where the cam is disengaged from the cam fitting portion, and prevents the swing arm from swinging. The thing which provided the fitting part is disclosed.

However, according to the above configuration, the swing arm can be held at an appropriate position when the vibrating blade unit is not used, but it is necessary to form the protrusion of the fixing member of the motor and the protrusion fitting portion of the swing arm. As the cost increases, the distance from the vibrating blade unit to the cam fitted to the rotary shaft of the motor becomes long, resulting in a large transmission loss of the driving force.

(C) Problems to be Solved by the Invention A problem to be solved by the present invention is that the side cutter is provided without providing the protrusion and the protrusion fitting portion other than the joint fitting portion of the swing arm as in the above-described conventional technique. This is to prevent the generation of noise due to unnecessary swinging when the motor is driven by holding the swinging arm at an appropriate position when not in use.

(D) Means for solving the problem A main body case with a built-in motor, a side cutter mounted on the main body case so that it can stand up and down, and a side cutter slidably mounted on the main body case. A side cutter knob that rotates from the lying position to the standing position, a vibrator that is provided in the main body case to convert the rotational motion of the motor into a reciprocating motion, and the side cutter and the vibrator in the main body case. A drive lever selectively connectable through an opening formed, the drive lever being pivotally supported by the side cutter knob so as to be swingable so that the upper end of the side cutter is in an upright position. While engaging with the side cutter, the opening portion of the main body case is formed in a tapered shape downward, and the drive lever of the drive lever is stopped at a lower stop position of the side cutter knob. Allowed to hold the end in the minimum width portion of the opening.

(E) Action When the side cutter is used, the drive lever penetrates the upper portion of the opening of the main body case and is connected to the motor, and the driving lever can swing on the upper portion of the opening. Therefore, the driving force of the motor is transmitted to the side cutter, and the side cutter reciprocates at the standing position.

When the side cutter is not used, the lower end of the drive lever is held by the minimum width portion of the opening portion, so that even if vibration during driving the motor is transmitted to the drive lever, the drive lever does not cause unnecessary vibration.

(F) Example Hereinafter, an electric shaver of the present invention will be described in detail with reference to an example of the drawings.

2 to 4 are external views of the electric razor,
(1) is a front case (1a) and a rear case (1) divided into two.
It is a main body case made of synthetic resin obtained by combining b), and a start switch (2) slidable in an oblique direction is provided on the outer surface of the front case (1a), and a charging indicator is displayed below the switch. And two indicator lamps (3a) and (3b) for displaying the current state are installed, and the side cutter knob (4) that moves up and down is slidably mounted on the outer surface of one rear case (1b). An upper side of this knob (4) is a side cutter (5) which can be erected and laid down and which horizontally projects from the storage position along the outer surface of the rear case (1b) by the upward movement of the knob (4). It is pivotal.

(6) is an outer die frame made of aluminum die-casting which is detachably mounted and engaged on the upper part of the main body case (1). A large number of arched frames are formed in the upper opening. A nickel electroformed outer blade (7) having a beard introduction hole is replaceably attached.

6 and 7 are vertical views showing the internal structure of the electric razor.
It is a cross-sectional view, (8) is a motor screwed and fixed to a motor holding plate (9) held in the main body case (1), and (10) supplies a driving current to the motor (8). A rechargeable nickel-cadmium battery, (11) is a composite that is suspended from the main body case (1) in the space between the upper end of the main body case (1) and the moder holding plate (9). This is a vibration driver made of resin. This vibration driver (11) has thin leg pieces (11a) (11b) on both sides, and the thin leg pieces (11a)
The free end of (11b) is fixed to the main body case (1), and has a drive rod (12) extending upward, and the drive rod (12) is formed on the upper end surface of the main body case (1). The main body case (1) is projected and positioned through the through hole (13). Further, the vibration driver (11) is loosely fitted to an eccentric pin (14) fixed to the rotation shaft of the motor (8) on the lower surface of the vibration driver (11) so that the rotational movement of the motor (8) is reciprocated by the driver (11). A drive converter (15) having an elliptical hole (15a) for converting to a drive unit and a drive transmission unit (16) for transmitting the drive from the motor (8) to the side cutter (5).

(17) is an inner blade body detachably engaged with an inner blade mounting base made of synthetic resin mounted on the top of the drive rod (12), and the outer blade frame (6) and the main body case ( 1) is provided so as to be driven by an appropriate pressure contact force with respect to the inner surface of the outer blade (7) fixed to the outer blade frame (6) in a space for storing a beard waste formed between the outer blade frame (6) and It consists of a large number of stainless steel crescent-shaped blades planted on a synthetic resin base.

The side cutter (5) and the side cutter pick (4)
Is slidably disposed in a recess (18) formed in the outer surface of the rear case (1b) shown in FIGS. 1 and 5, and the side cutter (5) is a side cutter knob ( 4) Horizontal ribs (19a) (19b) in the vertical direction formed on the upper part of
And is rotatably held between both side walls (20a) (20b) of the recess (18). Reference numeral (21) is a drive lever pivotally supported about a boss (22) as a support projection formed by projecting in the horizontal direction on the inner surface side of the side cutter knob (4) so as to be swingable. Its upper end facing (21
a) is engageable with the rear end of the movable blade of the side cutter (5) in the standing position through a through hole (4a) formed in the upper part of the side cutter knob (4), ) Side, the lower end (21b) of the rear case (1
The bifurcated drive conversion part () of the vibrator (21) at the upper stop position of the side cutter knob (4) through the opening (23) formed in the upper part of the recess (18) of b). 16) can be engaged. The lower end portion (21b) of the drive lever (21) is located at the bottom of the opening (23) at the lower stop position of the side cutter knob (4) when the side cutter (5) is not used. The hole portion (23) has an inverted triangular shape and is formed in a taper shape toward the lower side, and the bottom portion thereof has the lower end portion (21
The minimum width (23a) is such that b) barely fits in.
Therefore, the drive lever (21) whose lower end portion (21b) is held by the minimum width portion (23a) cannot perform the swinging motion around the boss (22).

In the electric shaver having the above configuration, when the start switch (2) is slid to the ON position (obliquely upward), when the battery (10) supplies power to the motor (8), the motor (8) is driven to cause eccentricity. The pin (14) rotates, which causes the new driver (11) to reciprocate. At this time, when the side cutter knob (4) is in the downward stop position and the side cutter (5) is also in the lying state, the upper end (21a) and the lower end (21b) of the drive lever (21) and the side cutter (5). Also, the vibration driver (21) is not engaged with the drive converter (16), and therefore the side cutter (5) is not driven. On the other hand, the motor (8) is being driven, and the vibration caused by the motor (8) is transmitted to the drive lever (21) through the main body case (1),
Since both ends (21a) and (21b) of the drive lever (21) are free, there is a possibility that the drive lever (21) may freely swing around the boss (22) to generate unpleasant noise. Since the lower end portion (21b) of the lever (21) is held by the minimum width portion (23a) of the opening portion (23) of the rear case (1b), the fine movement of the drive lever (21) is prevented, and It is positioned and held at an appropriate position (central position).

Next, while the motor (8) is still driving, the side cutter knob (4) is moved up to the upper stop position, and the side cutter (5) is rotated to the upright position.
The upper end part (21a) of 1) is engaged with the movable blade of the side cutter (5), and the lower end part (21b) is engaged with the drive conversion part (16) to reciprocate the vibration driver (11). It is transmitted to the side cutter (5) via the drive lever (21). The width of the upper part of the opening (23) and the through hole (4a) of the side cutter knob (4) is set larger than the swing range of the drive lever (21). 21) does not hit both parts and emits strange noise.

(G) Effect of the Invention As described above, the present invention includes a main body case having a built-in motor, a side cutter mounted on the main body case so as to be upright and inclinable, and slidably attached to the main body case. A side cutter knob for rotating the side cutter from its fallen position to a standing position, a vibrator provided in the main body case for converting the rotational motion of the motor into a reciprocating motion, the side cutter and the vibrator. A drive lever selectively connectable via an opening formed in the main body case, the drive lever engaging the upper end of the side cutter with the side cutter at the standing position of the side cutter, The opening of the body case is tapered downward, and the lower end of the drive lever is held at the minimum width of the opening at the stop position below the side cutter knob. By tightening it, the drive lever can be positioned without providing a protrusion for fitting the drive lever or the main body case, and the connection between the drive lever and the vibrator is always smooth when switching from when the side cutter is not used to when it is used. In addition, the drive lever firmly held in the minimum width portion of the opening does not cause fine movement due to the vibration generated by the motor even when the side cutter is not used, and an unpleasant noise can be prevented from being generated.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a side cutter pick and a body case of an electric shaver according to the present invention, FIG. 2 is a front view of the electric shaver, FIG. 3 is a side view of the same, FIG. 4 is a rear view, and FIG. Is a front view of the rear case (with the side cutter removed), FIG. 6 is a vertical sectional view taken along the line vi-vi ′ of FIG. 4, and FIG.
FIG. 6 is a cross-sectional view taken along the line vii-vii ′ of FIG. (8) …… Motor, (1) …… Main body case, (5) ……
Side cutter, (4) …… Side cutter pick, (11)…
… Vibrator, (23) …… opening, (21) …… drive lever,
(23a) …… Minimum width part.

Claims (1)

[Claims] 1. A main body case having a built-in motor, and a side cutter mounted on the main body case so as to stand and fall freely.
A side cutter knob slidably attached to the main body case for rotating the side cutter from its fallen position to an upright position, and a vibrator provided in the main body case for converting rotational movement of the motor into reciprocating movement. And a drive lever capable of selectively connecting the side cutter and the vibrator through an opening formed in the main body case, the drive lever being swingable by the side cutter knob. Is pivotally supported by the side cutter to engage the upper end of the side cutter with the side cutter at the same time, and the opening of the main body case is formed in a tapered shape downward, and the side cutter is stopped at the lower stop position. An electric shaver in which the lower end of the drive lever is held in the minimum width portion of the opening.