JPH01198588A - Electric razor - Google Patents

Abstract

PURPOSE:To obtain the switch mechanism of a simple structure capable of performing a proper lock operation and a moderation operation by dividedly disposing an elastic arm and a positioning arm up and down from the fixing line between a switch knob and a switch operating piece. CONSTITUTION:When the switch knob 17 is pressed by a finger end, an operating member 26 is pushed to an interior side in a case, an engaging part 23 connected through a connecting part 26b to said operating member 26 is pressed and moved to the interior side in the case through the elastic arm 23a, namely, to a lock cancelling direction, the engagement of the engaging part 23 and an engaging step part 25 is cancelled to cancel the sliding lock of the switch knob 17. When the switch knob 17 is slid and operated from an upper switch on position to the off position of a lower step, the engaging part 23 is reengaged with the step part 25 according to the elastic restoring force of the elastic arm 23a to return to the lock state. Since the elastic arm 23a and the positioning arm 22 are dividedly disposed up and down the fixing line of the switch knob 17 and the switch operating piece 20, deformation operating forces operating respectively thereto do not mutually interface.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an electric shaver equipped with a sliding switch knob on the main body case for turning the switch on and off, and a locking mechanism that slides and locks the switch knob in the off position. Has characteristics.

[Problem that the invention seeks to solve]

In the embodiment in which the entire switch operation piece 20 is pressed by the operation member 26, firstly, the pressing operation force becomes excessive, and moreover, lock release failure is likely to occur. Second, deformation and rattling of the switch operating piece 20 can easily cause sliding failures and damage, which can easily lead to unstable on/off operation of the switch and locking failure.

[Purpose of the invention]

An object of the present invention is to provide an electric shaver equipped with a switch mechanism having a simple structure in which a switch knob 17 and a switch operating piece 20 arranged inside and outside a main body case 1 can slide smoothly without wobbling even after continuous use for a long period of time. is to obtain.

An object of the present invention is that the switch knob 17 is connected to the switch operation piece 2.
Can be securely slid and locked in the switch off position via 0,
To obtain an electric shaver equipped with a switch mechanism capable of releasing the sliding lock with a small operating force.

An object of the present invention is to provide an electric shaver equipped with a switch mechanism in which the switch knob 17 and especially the switch operation piece 20 which has a locking function are not easily deformed or damaged in whole or in part.

[Means for solving problems]

In the present invention, the switch knob 17 is mounted on the outer surface of the main body case 1, and the switch operating piece 20 is mounted on the inner surface of the main body case 1 so that they can slide together.
An elastic arm 23a is provided on the free end side with an engaging part 23 for a sliding lock that can be engaged with an engaging step part 25 on the inner surface of the main body case l, and an elastic arm 23a that can be elastically deformed in the inner and outer directions of the main case l. A positioning arm 22 which is elastically deformable in a direction along the inner surface of the case and which produces moderation between a moderation protrusion 24 protruding from the case and a positioning arm 22 extending integrally with the above elastic arm 23a and positioning arm 2
2 and the switch knob 17 and the switch operation piece 20, respectively.
This is a fixed line arranged along the border.

[Effect]

In this case, when the switch knob 17 and the switch operation piece 20 are in the switch off position (in the illustrated example, the lower position), the engaging part 23 abuts and engages with the engaging step part 25, and the switch knob 17 is in the switch position. It is locked from sliding to the on position (downward in the illustrated example).

When operating the switch, when the fingertip is placed on the switch knob 17 and the operating member 26 facing a part of the knob 17 is pushed inward of the case, the engaging portion 23 is pushed in the unlocking direction by the elasticity of the elastic arm 23a. It comes off from the engagement step and the sliding lock is released.

〔Example〕

The drawing shows an embodiment of an electric shaver according to the present invention.

In FIGS. 2 and 3, 1 is a main body case.

The upper part of the main body case 1 includes an inner cutter 2, an inner cutter drive mechanism 3 that reciprocates the inner cutter 2 in the left and right directions with a small constant stroke, and a clipper-shaped fixed blade 4a and a movable blade 4b. A razor 4 is installed, and an outer cutter 5 is detachably attached via an outer cutter holder 6, and the inner cutter 2 is in sliding contact with the inner surface of the outer cutter 5.

In FIG. 3, the inner blade drive mechanism 3 fixes a balance weight 8 to the motor output shaft 7, engages an eccentric pin 9 implanted in the weight 8 with a vibrator 10, and causes the vibrator 10 to vibrate left and right. A holder 12 of an inner cutter 2 is connected to a shaft 11 extending from the vibrator 10, and the inner cutter 2 is elastically abutted against the inner surface of the outer cutter 5 and reciprocated in the left and right directions. A bifurcated protrusion 13 for driving a razor is protruded from the front surface of the vibrator 10. The function of this protrusion 13 will be described later.

In FIGS. 3 and 4, the edge razor 4 is attached to the outer blade holder 6.
The upper end of the razor 4 is swingably supported on the main body case 1 via left and right pins 14, as shown in the imaginary line in FIG. Approximately 9
It can be switched between a posture in which it swings upward by 0 degrees and protrudes forward, and an approach posture shown by a solid line in the figure. Only when the edge razor 4 is in the protruding position, the tongue piece 15 protruding from the upper part of the edge razor 4 faces inward of the case, and the above-mentioned bifurcated protrusion 13
The movable blade 4b of the edge razor 4 is connected to the inner blade drive mechanism 3 and becomes ready to be driven.

Inside the main body case 1, a rechargeable battery 16, an electric motor (not shown) driven by the rechargeable battery 16, and electric circuits for charging and driving the motor are built into the main body case 1. It is equipped with a sliding switch knob 17 that can be operated in stages.

When the switch knob 17 is in the lower position, it becomes a switch knob, and when the knob 17 is pushed up to the middle position, the built-in electric motor is energized and the inner blade drive mechanism 3 is operated, and the knob 17 is then moved to the upper position. When pushed up to the position, the edge razor 4 protrudes forward with the inner blade 2 still driven, and at the same time as the tongue piece 15 engages with the bifurcated protrusion I3, the edge razor 4 protrudes forward.
is driven.

1, 4 and 5 show the switch mechanism, in which a pair of left and right connecting pins 18 are attached to the back of the switch knob 17.
are provided protrudingly, each pin 18 projects into the case through the left and right elongated holes 19 bored in the front wall of the main body case I, and the protruding tip of each pin 18 connects to a switch operation piece 20 installed inside the main case I. The switch knob 17 and the plate-shaped switch operating piece 20 are integrated into each connecting hole 21 formed in the switch knob 17 and fixed thereto.

A positioning arm 22 that can be elastically deformed in the left and right direction is connected to the lower edge of this switch operation piece 20 on the left and right.
Each arm 22 properly positions and holds the switch operating piece 20 and the switch knob 17 integrated therewith in three positions, upper, middle, and lower, by contacting and riding over the upper and lower projections 24 protruding from the inner surface of the case.

A pair of elastic arms 23a, 23a are arranged in a cantilever manner from the left and right upper ends of the switch operating piece 20, and engaging portions 23.23 are integrally formed at the upper ends of each elastic arm 23a, 23a. There is. On the other hand, on the inner surface of the main body case 1 side, an engaging stepped portion 25 is formed at the left and right opening edges of each of the vertically elongated holes 19, and the upper surface thereof has a downwardly sloped surface 25a.
3 in the direction perpendicular to the sliding direction plane. - When the switch knob 17 and the switch operating piece 20 connected thereto are in the lowest switch-off position, each engaging portion 23 abuts and engages with each engaging step portion 25, and the switch knob 17 is moved upward. The switch is locked from sliding into the on position.

The retaining portion 23 swings in and out of the case via the elastic arm 23a between a locked position in which it abuts and engages with the engagement step portion 25 and an unlocked position in which it disengages from the step portion 25. . It has an operating member 26 for pushing and moving the retaining portion 23 from the locked position to the unlocked position. As shown in FIGS. 1 and 5, the operation member 26 on the illustrated side is composed of a left and right horizontally elongated plate-like operation portion 26a and connecting portions 26b, 26b protruding inward from the left and right inside surfaces of the operation portion 26a, and the switch knob 17. The operation part 26a is fitted and engaged with the opening 27 provided transparently in the opening 27 so as to be movable in the inward and outward directions while preventing the outward direction.
The protruding end of each connecting portion 26b is connected to each retaining portion 23 on the switch operation piece 20 side through the vertically elongated hole 19 in abutting state.

In this case, when the switch knob 17 is in the lower switch-off position, upward sliding of the knob 17 is locked in the manner described above. In this state, the operating portion 26a of the operating member 26, which is fitted into the opening 27 of the switch knob 17, slightly protrudes to the outside of the front surface of the knob 17.

In use, when the switch knob 17 is pressed with a fingertip, the operating member 26 is pushed into the inner part of the case. As a result, the retaining part 23, which is connected to the operating member 26 via the connecting part 26b, is pushed to the inner side of the case, that is, in the unlocking direction, through the elastic arm 23a, and engages with the engaging part 23. The engagement with the step portion 25 is released, and the sliding lock of the switch knob 17 is released. Therefore, by lightly pressing the tip of a finger on the switch knob 17 and simultaneously pushing the knob 17 upward, the switch can be slid from the off position to the upper on position with a single touch.

When the switch knob 17 is slid from the upper switch-on position to the lower switch-off position, the engaging part 23 is guided by the downwardly inclined surface 25a of the engaging step part 25, and after climbing over the step part 25, the elastic The engaging portion 2 is moved by the elastic restoring force of the arm 23a.
3 returns to the locked state in which it engages with the stepped portion 25 again.

In addition, to explain the ejection/retraction operation mechanism of the edge razor 4, as shown in FIGS. 4 and 5, a plate-shaped edge razor blade elongation/retraction operation member 30 is arranged inside the main body 1 so as to be movable up and down. and
A hook portion 31a at the tip end of the arm 31 extending upward from the advancing/retracting operation member 30 engages with the upper edge of the side lip 32 of the cutting razor 4. Further, inside the main body case 1, there is a balance arm 34 whose left and right intermediate portions are pivotally supported by a pin 33.
One end of the balance arm 34 is connected to the egress/retraction operation member 30 by a pin 35. In this case, when the switch operation piece 20 is pushed up one step from the lower position to the middle position by operating the switch knob 17, the hook-shaped tip of the abutment arm 36 connected from the operation piece 20 touches the balance arm 34 and other parts. It engages in the notch recess 37 formed at the end, and then the switch knob 1
7 from the middle position to the upper position, the balance arm 34 swings clockwise, and the ejection/retraction operation member 30 is pulled down, causing the razor 4 to protrude.

Further, when the operating piece 20 is pushed down from the upper end position to the middle position, the hook-shaped tip of the abutment arm 36 engages the notch recess 3.
7, the balance arm 34 rotates back in the counterclockwise direction, and the razor 4 is retracted. When the operating piece 20 is further lowered from the middle position to the lower position, the contact arm 36 is automatically removed from the balance arm 34.

An engagement recess 38 is formed on the side edge of the egress/retraction operation member 30, and an operation knob 40 having a protrusion 39 that engages and disengages with the recess 38 slides on the outer surface of the side wall of the main body case l over two upper and lower positions. It is attached freely. The upper end of the operating knob 40 is elastically deformable in the outward and outward directions, and the protrusion 39 is located on the inner surface of the upper end of the knob 40. When the operation knob 40 is slid upward and the egress/retraction operation member 30 is in the pushed-up position, the protrusion 39 is disengaged from the engagement recess 38 and placed in an opposing arrangement.

Now, slide the switch knob 17 to the upper position,
When the razor 4 is projected and driven, the ejection/retraction operation member 30 is pulled down, so the operation knob 40 in the upper position does not engage with the ejection/retraction operation member 30. In this state, the shaving operation is in progress. However, when the operating knob 40 is pushed inward of the case while the switch knob 17 is kept in the lower OFF position, the protrusion 39 engages with the opposing engagement recess 38. If the operation knob 40 is pressed down in this state, the razor 4 can be operated to directly protrude in a non-driving state.

In this state, the edge razor 4 will be cleaned.

When the operation knob 40 is pressed down, the protrusion 39 is engaged with the engagement recess 38, and when the operation knob 40 is pushed up, the razor 4 retracts and the protrusion 39 is removed from the engagement recess 38. becomes the state of Incidentally, if the switch knob 17 is slid to the upper stage while the operation knob 40 is pressed down and the razor 4 protrudes, the razor 4 will be automatically driven.

[Brief explanation of the drawing]

The drawings show an embodiment of the electric shaver according to the present invention, in which Fig. 1 is an enlarged longitudinal sectional side view of the main part showing the switch mechanism, Fig. 2 is a perspective view of the overall appearance, and Fig. 3 is a part thereof. A cutaway side view, Figure 4 is a front view of the internal structure seen from the back side, and Figure 5 is a front view of the internal structure seen from the back side.
The figure is an exploded perspective view, and FIG. 6 is a side view illustrating the protruding operating state of the razor. l...Body case 2...Inner blade 3...Inner blade drive mechanism 5...Outer blade 17...Switch knob 20...Switch operating piece 23...Engaging portion 23a... Elastic arm 25... Engagement step 26... Operation member 27... Opening.

Claims (1)

[Claims] (1) The switch knob 17 is attached to the outer side of the main body case 1, and the switch operating piece 20 is attached to the inner side of the main body case 1 so that they can slide together, and the switch operating piece 20 is attached to
The free end side is provided with an engagement part 23 for a sliding lock that can be engaged with the engagement step part 25 on the inner surface of the main body case 1, and an elastic arm 23a that can be elastically deformed in the inner and outer directions of the main body case and protrudes from the inner surface of the main body case. Moderation is generated between the provided moderation protrusion 24,
A positioning arm 22 that can be elastically deformed in a direction along the inner surface of the case is integrally extended,
An electric shaver characterized in that the elastic arm 23a and the positioning arm 22 are arranged so that the fixing line between the switch knob 17 and the switch operation piece 20 is divided into boundaries.