JPH0337582Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electric shaver equipped with a seesaw type switch.

[Prior Art] Generally, a slide type switch or a push type switch is often used as a switch for an electric shaver, and a seesaw type switch is rarely used. By the way, the seesaw type switch has a pair of pressing parts and is designed to moderate the operation of the switch operating body that seesaws.
With this moderation, when one pressing part is turned ON, the pair of leaf spring switch contacts are elastically deformed and kept in contact, and when the other pressing part is turned OFF, the switch contacts are brought into a non-contact state. It is designed to be held in place.

[Problem that the invention attempts to solve]

However, in the past, the switch operating body was kept in the ON or OFF operating state by the moderation structure in any state, so for example, when the outer blade was removed for cleaning, By mistake
When the ON operation is performed, the inner blade operates, and this operation of the inner blade continues until the OFF operation is performed.
The problem is that the dangerous state remains for a long time. Therefore, in order to eliminate such a fear, a safety switch that is linked to the attachment and detachment of the outer cutter body may be provided, but such a measure would be impractical because it would increase the cost.

[Means for solving problems]

In the present invention, a switch operating body having a pair of pressing portions is attached to a main body case to which an outer blade is detachably attached, and the switch operating body is mounted in the main body case by the seesaw movement of the switch operating body. At the same time, the pair of opposing leaf spring switch contact pieces are brought into contact and separated, and the elastically deformable articulation piece provided on the switch operating body is engaged with the moderation part provided on the main body case, thereby operating the switch. This is carried out in an electric shaver in which the operation of the operating body is moderated. The present invention also provides an intermediate member that is movable in the axial direction and non-rotatable in the circumferential direction, and is fitted to the support shaft that rotatably supports the switch operating body within the main body case. The intermediate member includes an outer cutter receiving portion that protrudes and retracts from the outer cutter abutment surface of the main body case, and an elastically deformable outer cutter receiving portion that is elastically deformable so that when the outer cutter is attached, the above-mentioned joint is supported. a spring portion that presses the movable piece against the moderation portion and causes the tip side of the outer blade receiving portion to protrude outward from the outer blade contact surface when the outer blade is removed; It is characterized by being integrated.

[Effect]

In an electric shaver equipped with the above solution,
When the outer cutter body is attached to the main body case, the outer cutter receiving portion protruding from the outer cutter contact surface of the main body case is pushed in by the outer cutter body. At the same time, the intermediate member comes close to or comes into contact with the switch operating body, and the spring portion of the intermediate member is bent to press the moderation piece of the switch operation body against the moderation portion of the main body case. In this state, the switch operating body can be operated in a see-saw manner with a sense of moderation, and the engagement between the moderating piece and the moderating portion can be disengaged, and the switch operating body can be inadvertently pushed back to the OFF side. This is prevented by the repulsive force of a pair of switch contacts that are elastically deformed by the ON operation. Further, when the outer cutter body is removed from the main body case for cleaning or the like, the intermediate member is simultaneously moved away from the switch operating body by the elastic force of the spring portion. As a result, the outer blade receiving portion protrudes outward from the outer blade contacting surface of the main body case, and the pressing action of the spring portion against the articulating piece disappears or becomes slight. Therefore, if you accidentally remove the outer blade during use, or if you turn it ON while cleaning and then immediately take your hand off the switch operation body,
The switch operating body is pushed back to the OFF side by the repulsive force of the pair of elastically deformed switch contacts, and the switch is automatically turned OFF.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is a main case made of synthetic resin made by connecting a front case member 2 and a rear case member 3 with connecting screws 4, etc., and its size fits in the palm of your hand as shown in Figures 6 and 7. A battery storage section 5 (see FIG. 5) is formed at the lower part. A battery (not shown) can be removably stored in the storage portion 5 by removing a lid 6 (see FIG. 4) that is removably attached to the lower rear surface of the rear case member 3. An outer blade mounting portion 7 having, for example, a threaded groove on the outer periphery is integrally provided on the upper part of the main body case 1 in a protruding manner. A front case member 2 surrounds the attachment portion 7 at the portion where the outer blade attachment portion 7 protrudes.
The upper plane of the blade serves as an outer blade contact surface 8. An outer cutter body 9 is removably screwed into the outer cutter mounting portion 7, and is positioned by abutting against the outer cutter contact surface 8.

As shown in FIG. 5, a motor 10 is built into the upper part of the main body case 1 and is screwed to the front case member 2, for example. A rotating shaft 10a of this motor 10 passes through the front case member 2 and projects to the inner center of the mounting portion 7 as shown in FIG. It is designed to be installed in Further, as shown in FIG. 8, metal lead plates 11 to 13 having spring properties are attached to the inner surface of the rear case member 3. The lower end of the lead plate 11 is inserted into the battery storage portion 5 as a battery contact piece, and the upper end is adapted to be elastically pressed into contact with a terminal 10b protruding from the rear surface of the motor 10. The lower end of the other lead plate 12 also enters into the battery storage portion 5 as a battery contact piece, and the upper part is formed as a switch contact piece 14. The lower end of the other lead plate 13 is adapted to be elastically pressed against a terminal 10c protruding from the rear surface of the motor 10, and the upper part is formed as a switch contact piece 15. Switch contact piece 1 in free state
4 and 15 are arranged to face each other in a substantially parallel state.

A support shaft 16 is integrally provided on the upper inner surface of the rear case member 3 and projects forward. This axis 16
is formed from a cylindrical portion and a square shaft portion connected to the tip of the cylindrical portion. A fitting tube part 18 of a switch operation body 17 is rotatably fitted into the cylindrical part of the support shaft 16, so that the switch operation body 17 is attached to be able to see-saw freely around the support shaft 16. . This switch operating body 17 forms a seesaw type switch together with the switch contacts 14 and 15.

The switch operation body 17 is an integrally molded product made of elastic synthetic resin such as polyacetal, and as shown in FIGS. The fitting cylindrical part 18 is provided in the center, and the pressing parts 19 and 2 are paired at both upper left and right ends of the flat plate part.
0, and an articulating piece 21 at the bottom of the flat plate part.
In addition, a pin-shaped contact piece operating portion 22 is provided at the intermediate portion in the height direction of the flat plate portion. The joint piece 21 is elastically deformable,
The rear surface thereof has an engaging protrusion 25 that is engaged with and disengaged from a pair of moderation parts 23 and 24 formed on the inner surface of the upper part of the rear case member 3. In addition, the moderation part 23, 2
Although 4 is formed by a pair of concave holes in this embodiment, it may be formed by a protrusion instead. Further, the contact piece operation part 22 is for moving the switch contact pieces 14 and 15 into and out of contact with each other, and is arranged close to one of the switch contact pieces 14 as shown in FIG. 18 when the switch is in the OFF state. . Moreover, this operation section 2
2 is centered on the support shaft 16 and each pressing portion 1
The switch contact pieces 13 and 20 are provided so as to be located substantially on a radial line passing through the switch contact pieces 13 and 20, thereby eliminating the risk of excessive force acting on the switch.
14 to prevent poor contact.

An intermediate member 26 is fitted and supported on the support shaft 16 so as to be movable along the axial direction of the support shaft 16 and prevented from rotating in the circumferential direction. In this embodiment, the square hole 26a of the intermediate member 26 is formed in the square shaft portion of the support shaft 16.
(see Fig. 2), but instead of this, a square hole is provided in the support shaft 16, and a square shaft protruding from the intermediate member 26 is slidably fitted into this square hole. May be combined. The intermediate member 26 is an integrally molded product of elastic synthetic resin such as polyacetal, and as shown in FIGS. 1 and 2, the outer blade receiving portion 2
7 and a spring portion 28, and in this embodiment further includes a pair of arm portions 29 and ring-shaped pressing portions 30, 31. The outer blade receiving portion 27 has a shaft shape and projects forward, and is inserted into an opening 32 provided in the upper part of the front case member 2 to project against the outer blade contact surface 8. I'm becoming completely incapacitated. The spring portion 28 has a plate shape and is elastically deformable, and its tip portion contacts the tip side of the articulation piece 21, and when the outer cutter body 9 is attached, the spring portion 28 is elastically deformable. The piece 21 is pressed against the moderation part 23 or 24, and the tip side of the outer blade receiving part 27 is made to protrude from the outer blade contact surface 8 when the outer blade 9 is removed. Further, the pair of arm portions 29 are each elastically deformable and are provided facing in opposite directions, and the ring-shaped pressing portions 30 and 31 provided at their tips are specially fitted into the pressing portions 19 and 20, respectively. are combined.

The pressing parts 19 and 30 are fitted into each other.
are exposed outside the main body case 1 by passing through a pair of continuous semicircular grooves 33 provided in the front and rear case members 2 and 3, respectively. At the same time, each of the pressing parts 19 and 30 that are fitted into each other is provided with a matching character for legibly forming the character "ON" across these surfaces when the surfaces thereof become flush. ing. Further, each of the other pressing portions 20 and 31 that are fitted to each other is inserted into the main body case 1 by passing through another pair of continuous semicircular grooves 34 provided in the front and rear case members 2 and 3, respectively. exposed to the outside. At the same time, when the surfaces of the pressing parts 20 and 31 that are fitted together are flush with each other, a signal is applied across these surfaces, for example, "OFF".
A matching character is provided to form a semi-readable character. Furthermore, the switch operating body 17
The outer surface of the fitting tube 18 is provided with "ON" and "OFF" indications, and a concave groove 35 (no. 1) is covered by a display lens 36. This lens 34 is made of transparent synthetic resin and is formed in a convex shape, so that the "ON" or "OFF" display facing the lens can be magnified and seen through.

In addition, numeral 37 in FIGS. 13 to 15 is a protective cap made of synthetic resin that is removably fitted to the front portion of the main body case 1. This cap 37 has engaging protrusions 38 provided on the inner surfaces of both sides as shown in FIGS. 3 and 4.
It is designed to be attached by engaging with an engaging recess 39 on the outer surface of the main body case 1 shown in the figure. The upper part of the protective cap 37 has a pair of cover parts 40, 41 that cover the respective sets of pressing parts 19, 30 and 20, 31. As shown in FIGS. 14 and 15, the cover section 40 that covers the ON operation side press sections 19 and 30 is arranged such that its ceiling surface is in contact with the top surface of the ring-shaped press section 30.
It has a structure that covers the pressing parts 19 and 30 on the ON operation side, and a tapered surface is provided on the inlet side.

In the electric shaver having the above structure, when the outer cutter body 9 is attached to the outer cutter attachment portion 7 of the main body case 1, the outer cutter body 9 is positioned by coming into contact with the outer cutter body contacting surface 8 of the main body case 1. As a result, the outer cutter receiving portion 27 of the intermediate member 26 protruding from the outer cutter contact surface 8 as shown in FIGS. 9 and 11 changes as shown in FIGS. pushed into. As the intermediate member 26 moves rearward due to such pushing, the intermediate member 26 comes close to or comes into contact with the front end surface of the fitting cylindrical portion 18 of the switch operation body 17, and the intermediate member 26
The spring portion 28 of 6 is bent to move the articulating piece 21 of the switch operating body 17 to the articulating portions 23 and 2 on the inner surface of the rear case member 3
Press it to 4.

In this state, the user turns on or off the switch operating body 17 of the seesaw type switch. These switch operations are performed by simultaneously pushing in each pair of pressing parts 19, 30 or 20, 31 which are projected from the outer surface of the main body case 1 and fitted into each other. The switch operating body 17 can be operated in a see-saw manner with a sense of moderation.

In other words, when the electric shaver is OFF, the 16th
As shown in FIG.
0, since the pressing part 19 protrudes from the ring-shaped pressing part 30, the pressing part 19 is moved while elastically deforming the arm part 29 having the pressing part 30 at the tip.
At the same time, by pushing in the ring-shaped pressing portion 30, the switch operating body 17 is rotated in the clockwise direction in FIG. Then, while the articulation piece 21 is elastically deformed while resisting the pressing force of the spring part 28, the engagement protrusion 25 is moved to the OFF articulation part 24.
The moderation part 23 for ON is separated from and adjacent to this.
This provides a sense of moderation. By the above operation, each pressing part 20, 31 of the OFF side group
In this relationship, the pressing part 20 is the ring-shaped pressing part 3.
1, and an "ON" display provided on the fitting cylinder portion 18 of the switch operation body 17 is exactly opposite to the display lens 36. At the same time, due to the rotation of the switch operating body 17, the armature operating section 22 pushes the switch armature 14 to contact the switch armature 15, and elastically deforms them. That is, the seesaw type switch is switched to the ON state.

In this ON state, the repulsive force of the pair of elastically deformed switch contact pieces 14 and 15 acts to push the switch operating body 17 back to the OFF side, but this force is due to the pressing force of the spring portion 28. Since the engagement force between the articulation piece 21 and the moderation part 23 is greater, the switch operating body 17 may be accidentally
This can prevent it from being pushed back to the OFF side.
Moreover, when the finger is removed from each of the pressing parts 19 and 30 which are flush with each other after the above-mentioned ON operation, the arm part 29 immediately returns to its original position due to its elastic force. The state in which the switch is turned ON as described above is shown in FIGS. 17 and 19.

Also, when switching the switch to OFF,
It is only necessary to press the pressing parts 20 and 31 of the OFF side group at the same time, thereby switching to the OFF state by the same operation as the above-mentioned switching to ON. The state in which the switch is turned off is shown in FIGS. 16 and 18.
In this state, the pressing part 19 of the ON side is protruded from the ring-shaped pressing part 30, and the contact piece operating part 22
As the switch leaves the switch contact piece 15, the switch contact pieces 14 and 15 also separate, and the fitting cylinder part 18
The OFF display is exactly opposite the display lens 36.
This OFF state is maintained by engagement between the articulating piece 21 biased by the spring portion 28 and the OFF-side moderating portion 24.

Further, when the outer blade body 9 is removed from the main body case 1 for cleaning or the like, at the same time, the elastic force of the spring portion 28 causes the intermediate member 26 to move away from the fitting cylinder portion 18 of the switch operation body 17 toward the front side. will be moved to As a result, the outer blade receiving portion 27 protrudes from the outer blade contact surface 8 of the front case member 2, and the pressing action of the spring portion 28 against the articulation piece 21 disappears or becomes slight.

Therefore, if you accidentally remove the outer blade body 9 during use, or if you release your hand from the pressing part 19 of the switch operating body 17 immediately after turning the ON button while cleaning, the pair of elastically deformed blades The switch operating body 17 is moved by the repulsive force of the switch contacts 14 and 15.
It is rotated so that it is pushed back to the OFF side, and the switch is automatically turned OFF. Therefore, even if the inner blade is mishandled during cleaning or the like, the inner blade will not operate, and the work can be carried out safely.

As described above, the engagement force of the articulation piece 21 with the moderation parts 23 and 24 is not obtained by the elastic force of the moderation piece 21 itself, but in the front-back direction in conjunction with the attachment and detachment of the outer blade body 9. Spring portion 28 of the moving intermediate member 26
Since the elastic force is obtained by the elastic force, there is no force acting that would cause the fitting cylinder portion 17 fitted to the support shaft 16 to become oblique due to the elastic force. Therefore, the rotation of the fitting cylinder 18 with respect to the support shaft 16, that is, the seesaw movement of the switch operating body 17 can be smoothly performed.

Further, the elastically deformable arm portion 29 provided in the intermediate member 26 allows the ring-shaped pressing portions 30, 3
1 is immediately exposed from the groove 33 or 34 after the pushing is released, so the thickness of the groove 33 or 34 is not visually recognized and the appearance is good. In addition, the state of the seesaw type switch can be easily determined by whether the pressing portion 19 or 20 of the switch operating body 17 is flush with the ring-shaped pressing portion 30 or 31 or protrudes from the ring-shaped pressing portion 30 or 31.

In addition, after use, please remove the protective cap 3 of the main body case 1.
7, even if the electric shaver is in the operating state, the ON side cover part 40 presses the pressing part 19, so that the switch can be turned to the OFF state. And like this protect cap 3
The switch is always turned OFF when 7 is mated, so if the power source is a storage battery, the protective cap 3
By attaching 7 and charging, it is possible to prevent charging while operating the inner blade by mistake.

Although the above embodiment has been constructed as described above, it goes without saying that the present invention can also be applied to a reciprocating electric shaver. Specific structures, shapes, positions, materials, etc. of the body contact surface, switch operation body, pressing part, support shaft, switch contact piece, articulation piece, moderation part, intermediate member, outer blade receiving part, spring part, etc. Of course, the present invention is not limited to the one embodiment described above, and can be implemented in various configurations.

[Effect of idea]

According to the present invention, the gist of which is the configuration described in the above claims, when the outer blade is removed, the moderation holding force of the switch operating body of the seesaw switch is lost, and the pair of leaf spring switch contacts are removed. Since the operating body is pushed back by the spring force on one side and the seesaw switch is automatically turned off, there is no need to install a special safety switch, so if the outer blade is removed by mistake during use or while cleaning Even if you accidentally turn on the switch, it will immediately turn off, making it safe to use.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an exploded perspective view of the main parts, FIG. 2 is an exploded perspective view of a partially assembled state of the main parts, and FIGS. 3 and 4 are respectively 5 is an exploded perspective view of the entire structure excluding the switch operating body and intermediate members; FIGS. 6 and 7 are perspective views showing how it is used; and FIG. 8 is the outer cutter. A perspective view of the upper part showing the state with the body removed, FIG. 9 is a plan view of the state with the outer blade removed, FIG. 10 is a plan view of the state with the outer blade attached,
11 is a sectional view of the upper part taken along line - in FIG. 9, FIG. 12 is a sectional view of the upper part taken along line - in FIG.
Figures 4 and 15 are diagrams showing the relationship between the pressing part of the switch operating body and the protective cap in different states, Figure 16 is a perspective view of the upper part in the OFF state as seen from the rear side, and Figure 17 is the ON state. FIG. 18 is a front view of the main parts in the OFF state, and FIG. 19 is a front view of the main parts in the ON state. 1...Main body case, 8...Outer blade contact surface, 9...
...Outer blade body, 14, 15...Switch contact piece, 16
...Spindle, 17...Switch operating body, 19,20
. . . Pressing portion, 21 . . . Articulation piece, 23, 24 .

Claims (1)

[Scope of Claim for Utility Model Registration] A switch operating body having a pair of pressing parts is attached to a main body case to which an outer blade is detachably attached so that it can freely see-saw, and the seesaw movement of the switch operating body causes the above-mentioned main body to be moved. A pair of opposing leaf spring switch contact pieces provided in the case are brought into contact and separated, and an elastically deformable articulation piece provided on the switch operating body is engaged with a moderation portion provided on the main body case. In the electric shaver in which the operation of the switch operating body is moderated, the switch operating body is movable along the axial direction of the spindle that rotatably supports the switch operating body within the main body case. An intermediate member is fitted and supported while being prevented from rotating in the circumferential direction. When the outer blade body is attached, the articulating piece is pressed against the moderation part, and when the outer blade body is removed, the tip side of the outer blade receiving part is pressed against the outer blade body. An electric shaver characterized in that each spring part is integrally provided with a spring part that projects outward from a contact surface.