JPS6159155B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an electric shaver with trimmer blades, and more particularly to an electric shaver with trimmer blades in which the trimmer blades protrude outward during use.

[Background technology]

Conventionally, in the case of this type of electric shaver where the trimmer blade protrudes outward during use, when the main blade is in use, the switch handle is integrated with the functions of turning the power on and off and opening and closing the trimmer blade. Also, there was a problem in which the trimmer blade inadvertently flew outward due to excessive sliding of the switch handle, resulting in a state in which the trimmer blade was driven.

[Purpose of the invention]

The present invention has been made in view of the drawbacks of the conventional example described above, and its purpose is to vary the operating force of the switch handle depending on when the trimmer blade block is protruding and when the main blade is driven, and the motor is activated. To provide an electric shaver with a trimmer blade capable of preventing erroneous operation of a switch handle when the trimmer blade protrudes when attempting to input a switch.

[Disclosure of the invention]

Composition of the Invention The present invention provides a click part for clicking the switch handle on a spring part that requires a low switch input time of the motor and has a high spring constant when the trimmer blade block is projected. This article focuses on an electric razor with a trimmer blade that is easy to operate, makes the switch handle heavy to operate when the trimmer blade is protruding, and accentuates the strength and weakness of the three-stage operation of the switch handle.

Example 1 The present invention will be explained in detail based on examples shown in the figures below. The electric shaver with trimmer blades according to the present invention includes a housing 1 in which an inner cutter 3 driven by a motor 2 projects upward, and an outer cutter 4 attached to the upper end of the housing 1 and extending along the inner cutter 3. An outer cutter frame 5, a trimmer blade block 6 which is attached to a part of the housing 1 and can freely protrude outward, and one end of which is connected to the trimmer blade block 6 to move the trimmer blade block 6 across the housing 1. A trimmer lever 8 that moves between two positions within the housing 1 to switch between a retracted position and an outwardly projecting position, and a stop that slides along one side of the outer surface of the housing 1 to stop the motor 2. The switch handle 7 stops at two operating positions: the drive position and the drive position where the inner cutter 3 is driven by the motor 2, and the switch handle 7 moves the trimmer lever 8 to project the trimmer blade block 6 out of the housing 1. The switch handle 7 stops at two operating positions: the trimmer blade block 6 is retracted and the trimmer blade block 6 is retracted.
is a member connected to the motor 2, which is connected to the movable blade 10 of the trimmer blade block 6 when the trimmer blade block 6 protrudes, and converts the rotational movement of the motor 2 into a reciprocating movement of the movable blade 10. The switch handle 7 is equipped with an eccentric cam 28 that is disconnected from the movable blade 10 when the
It is held at this stop position by a plurality of click parts 51 and 61 provided on the switch board 20 which are interlocked with the switch board 20. In the embodiment shown in FIGS. 1 and 2, a switch handle 7 is provided on the front of the housing 1.
A trimmer blade block 6 is attached to the rear surface of the housing 1, and a trimmer lever 8 rotates within the housing 1. An example is shown in which the trimmer blade block 6 protrudes outside the housing 1 when the switch board 20 moves upward. The housing 1 is formed by combining two generally T-shaped half bodies 11, 11 with a wide upper part, and a portion below the wide part 13 serves as a handle part. The switch handle 7 is disposed on the outer surface of the upper end of the handle portion of one half body 11, and as shown in FIG. The switch board 1 is fitted into a locking hole 21 of a switch board 20 in the switch board 1 so as to be vertically movable.
The switch board 20 moves up and down in conjunction with the switch handle 7.
A pair of elastic arms 52 and 62 extend into the upper end and center opening of 0, respectively.
2 and 62 constitute a spring portion 50.
Semicircular click portions 51 and 61 are protruded from the tip of each elastic arm 52 and 62, and a click portion is provided on the switch handle 7 so that the switch handle 7 stops at a fixed position within the half body 11. is given, and the movable contact 26 provided on the switch board 20
The motor 2 is turned on and off by sliding on a fixed contact 25 fixed at a fixed position in the housing 1. That is, the motor 2 is stopped at the lower position of the switch handle 7, which moves in three stages (top, middle, and bottom), and is driven at the middle position, and is connected to the output shaft 27 of the motor via an eccentric cam 28 and a driver 29. By reciprocating the inner cutter block 30 on the blade holder 31, the inner cutters 3 arranged in parallel on the inner cutter block 30 slide along the lower surface of the outer cutter 4 of the outer cutter frame 5, and The beard captured by the beard introduction hole of the blade 4 is shaved. On the other hand, the trimmer blade block 6 is housed in a storage recess 33 provided on the outer surface of the wide part 13 of the half body 11, which is different from the half body 11 to which the switch handle 7 is attached. The arms 34, 34, which are pivotally supported on the half body 11 and protrude from both sides of the upper end, are placed in the storage recess 33.
The trimmer blade block 6 is mounted so as to protrude into the housing 1 through the through holes 35, 35 on the bottom surface, and is rotated by the trimmer lever 8 which rotates within the housing 1, using the rear end as a fulcrum, and pops out from the storage recess 33. It's becoming like that. trimmer labor 8
As shown in FIG. 3, it is formed into a substantially U-shape, and a pivot pin 37 protruding from the longitudinal center of both leg pieces 8a, 8a is pivotally supported by a bearing 38 provided on the inner surface of one half body 11. Connecting pins 39, 39, which are rotatable around a horizontal axis within the housing 1 and protrude from the tips of the respective leg pieces 8a, connect the trimmer blade block 6, respectively.
is connected to arms 34, 34 of. On the other hand, the upper end of the switch board 20, which moves up and down together with the switch handle 7 within the housing 1, is provided with protrusions 40, 40 for abutting the body piece 8b of the trimmer lever 8 and pushing it upward, as shown in FIG. As shown in FIG. 3, when the switch handle 7 is pushed upward, the protrusion 40 pushes up the body piece 8b of the trimmer lever 8 and rotates the trimmer lever 8 around the pivot pin 37, thereby moving the trimmer blade block 6 into the first position. It is rotated in the direction shown by the arrow in the figure and FIG. 4 to make it pop out from the storage recess 33. A torsion coil spring 41 is interposed between the pivot pin 37 and the bearing 38, and the force of this torsion coil spring 41 causes the trimmer lever 8 to move the trimmer blade block 6 into the storage recess 33. If the switch handle 7 is moved from the upper position (trimmer open position) to the middle position (trimmer closed position), the trimmer blade block 6 will automatically move into the storage recess 33 from the protruded position. It's starting to come back. To shave finely using the trimmer blade block 6, push the switch handle 7 up to the upper position to drive the motor 2 as shown in FIG. It makes it stand out,
At this time, the engagement protrusion 44 protruding from the rear end of the movable element 43 of the trimmer blade block 6 fits into the engagement recess 45 of the drive element 29 that is being reciprocated, and the movable element 43
The movable blade 10 held on the fixed blade 46 is driven back and forth on the fixed blade 46. As mentioned above, the switch board 2
A pair of elastic arms 52 and 62 protrude from the upper end and the center opening of 0, respectively, so as to face oppositely to each other with respect to the finger hook 9. A spring portion 50 is constructed by the spring portion 50, and click portions 51, 61 are provided protruding from the free ends of each elastic arm 52, 62. On the other hand, a protruding rib 63 is provided in the center of the housing 1 to engage with a click part 61 in the opening, and two ribs 63 in the wide part 13 are provided in the wide part 13 to engage with a click part 51 on the upper end side. A pair of protruding ribs 54 and 55 are provided in a protruding manner, and a pair of protruding ribs 55 clickly engages with the click parts 51 and 61 at the same time as the central protruding rib 63 as shown in FIGS. 6a and 6b. The protruding rib 54 is adapted to be individually clicked into engagement with the click portion 52, as shown in FIGS. 5b to 5c. Further, protruding ribs 54, 5 protruding from the inner surface of the housing 1
The click part 51 of the switch board 20 is designed to stop before and after the trimmer blade 5, and the protruding rib 63 protruding from the inner surface of the housing 1 prevents the trimmer blade block 6 from being inadvertently removed when only the main blade is used with the trimmer blade block 6 in the closed position. The trimmer blade block 6 is prevented from being in the open position.

As shown in FIGS. 5b and 6b, when the switch handle 7 is pushed up from the lower position of the housing 1 to the middle position, the click part 51 at the tip of the elastic arm 52 tries to climb over the protruding rib 54. Therefore, the elastic arm 52 is bent and climbed over, pressed against the valleys of the protruding ribs 54 and 55 and stopped, and the click portion 61 at the tip of the elastic arm 62 is pressed against both sides of the protruding rib 63 to close the switch board 20 and the switch handle. 7 is prevented from being pushed up to the upper position, and the trimmer blade block 6 is held in the retracted closed position. In addition, in FIGS. 5a and 6a, as a means for holding the trimmer blade block 6 in the open position, when the switch handle 7 is held in the middle position and is pushed up to the upper part of the housing 1, the elastic arm is activated. 52
The elastic arm 52 is moved from the state in which the click 51 at the tip of the elastic arm 52 presses against the valleys of the protruding ribs 54 and 55 and stops.
bend to get over the protruding rib 55, and the protruding rib 5
At the same time, the click part 61 at the tip of the elastic arm 62 also climbs over the protruding rib 63 and is pressed against both sides of the protruding rib 63, so that the switch board 20 and the switch handle 7 are moved to the upper stage of the housing 1. The trimmer blade block 6 is held in the open position to prevent the switch board 20 from returning inadvertently. Fig. 5c Fig. 6c shows the state when the switch handle 7 is located at the lower stage of the housing 1, and the switch handle 7 and the switch board 20 are stopped with the click portion 51 pressed against one side of the protruding rib 54. ing.

In this way, when the switch handle 7 is slid from the off state to the switch input state, only one click part 51 clicks into engagement with the protruding rib 54, so the spring constant of the spring part 50 is relatively small, and the switch handle 7 You can easily operate the
Furthermore, when the switch handle 7 is slid to project the trimmer blade block 6, both the click parts 51 and 61 simultaneously engage with the projecting ribs 55 and 63, so the spring constant of the spring part 50 is relatively large, and the switch handle 7 becomes difficult to operate.
The elastic arm 5 is provided with click parts 51 and 61 for the finger hook part 9 of the switch handle 7.
2 and 62 are provided on both sides, the operating force in the switch input direction and the operating force in the switch off direction cancel each other out in the click force, so the operating force of the switch handle 7 is stabilized, and furthermore, they are mutually guided. This has the advantage of improving operability since they interact with each other.

Embodiment 2 The embodiment shown in FIG. 7 is another embodiment of the present invention, in which a pair of elastic arms 52 are extended upwardly from the upper part of the switch board 20 to form a spring section 50, and both elastic arms 52 Semicircular click portions 51 and 6 are provided at the free end and between the free end and the supporting end, respectively.
1 is provided protrudingly. On the other hand, a pair of protruding ribs 5 are provided in the housing 1 corresponding to the click parts 51 and 61.
4 is provided in a protruding manner, and the click portions 51 and 61 perform a clicking action between the protruding ribs 54 and the protruding ribs 54, respectively.

Next, the operating state of this embodiment will be described.
As shown in FIGS. 8b and 9b, the click portion 5 at the tip of the elastic arm 52 pushes up the switch handle 7 from the lower position to the middle position of the housing 1.
1 tries to get over the protruding rib 54, so it bends the elastic arm 52, gets over the protruding rib 54, comes into pressure contact with the protruding rib 54, and stops. In addition, in FIGS. 8a and 9a, as a means for holding the trimmer blade block 6 in the open position, when the switch handle 7 is held in the middle position, the switch handle 7 is pushed up to the upper position of the housing 1. The intermediate click portion 61 of the elastic arm 52 presses against the protruding rib 54 to prevent the switch handle 7 from returning, and the end face of the switch handle 7 hits the end face of the recessed portion of the housing 1 to stop the switch handle. Furthermore, FIGS. 8c and 9c show a state in which the switch handle 7 is located at the lower stage of the housing 1, and the switch handle 7 is stopped when the click portion 51 at the tip of the elastic arm 52 is pressed against one side of the protruding rib 54. It is being
In this way, since the two types of click parts 51 and 61 are provided at different distances from the supporting end of the elastic arm 52, their spring constants are different, and the middle click part 6
1 has a larger spring constant than the click portion 51 at the free end. Therefore, a stronger operating force is required when operating the trimmer blade block 6 to project it than when switching the motor 2. Furthermore, in this embodiment, a pair of elastic arms 5
The structure is simplified by forming the click parts 51, 61 for the switch and for protruding the trimmer blade on the elastic arm 52, and by changing the shapes of the two types of click parts 51, 61 provided on the elastic arm 52, the spring Pressure and stress can be set freely. Also click part 5
1 and 61 are not pushed against each other and the switch handle 7 is not twisted.
There will be no damage to the switch, and there will be no significant difference in operating force when inputting the switch.

Embodiment 3 Although not shown, a thin elastic arm with a small spring constant may be provided with a click portion that clicks when a switch is input, and a thick elastic arm with a large spring constant may be provided with a click portion that clicks when the trimmer blade is protruded. .

〔Effect of the invention〕

Since the present invention is configured as described above, the click force is greater when operating the switch handle when the trimmer blade is protruding than when operating the switch handle when inputting the switch, and the trimmer blade slides from the off state to the switch input state. When you want to move the trimmer blade, you can easily operate the switch handle with a small amount of force, but when you want the trimmer blade to protrude, the operation is heavy and you have to apply even more force to slide the switch handle. It has strong and weak accents, making it easy to operate, and it never happens when you accidentally let the trimmer blade stick out when trying to input a switch. Furthermore, a plurality of pairs of click parts are provided, and the combination of the protruding ribs and the click parts makes the amount of deflection of the spring part approximately the same when the motor switches and when the trimmer blade block projects. This has the advantage that excessive stress is not generated in the spring part and the life of the spring part can be maintained for a long time.

[Brief explanation of the drawing]

Figure 1 is a side view showing one embodiment of the present invention, Figure 2 is a side view showing one embodiment of the present invention;
The figure is an enlarged sectional view of the same as the above, Fig. 3 is an exploded perspective view of the same as the above, Fig. 4 is an enlarged sectional view showing the trimmer blade part of the same as the above, Figs. Figures a, b, and c are A, B, and C views of Figure 5 a, b, and c, respectively; Figure 7 is an exploded perspective view showing another example of the present invention; Figures a, b, and c are explanatory diagrams of the same action as above, Figure 9 a, b, and c are Figure 8 a,
They are a D arrow view, an E arrow view, and an F arrow view of each of b and c. 2...Motor, 6...Trimmer blade block, 7
...Switch handle, 50...Spring part, 51,
61... Click section.

Claims (1)

[Scope of Claims] 1. An electric shaver that switches from power off to motor switch input and trimmer blade block protrusion operation by three-step operation of one switch handle, in which a protruding rib is protruded from the housing and a spring provided on the switch handle is used. A plurality of pairs of click portions are formed in the trimmer blade portion to be clicked with the protruding ribs when the switch handle is operated, and the combination of the protruding ribs and the click portions reduces the spring constant of the trimmer blade block more than the spring constant of the click operation when inputting the switch of the motor. 1. An electric shaver with trimmer blades, characterized in that the spring constant of the click operation during the ejection operation is increased, and the amount of deflection of the spring portion during each click operation is made substantially the same. 2. A plurality of pairs of click parts are provided on the spring part, and a protruding rib is provided on the housing that clicks into each pair of click parts, so that only one pair of click parts act as a click when the switch is input, and when the trimmer blade block is extended. An electric shaver with trimmer blades according to claim 1, characterized in that the plurality of pairs of click portions are configured to perform a click action. 3 The spring part is composed of two pairs of elastic arms that protrude in opposite directions from the finger hook part of the switch handle, and a click part is provided at the tip of each elastic arm, so that when the switch is input, both pairs of Claims characterized in that the housing is provided with protruding ribs that simultaneously engage with the click portions and protruding ribs that engage with only one of the click portions alone when the trimmer blade block is protruding. The electric shaver with trimmer blades according to item 2. 4. A click part is provided at the free end of the elastic arm constituting the spring part to act as a click when a switch is input, and a click part to act as a click when the trimmer blade block is protruded is provided between the free end and the support end of the elastic arm. An electric shaver with trimmer blades according to claim 1, characterized in that: