JPH0919578A - Reciprocation type electric razor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable securing of better assembling performance along with no inevitable increase in thickness involving a base in a type using a cylindrical housing. SOLUTION: This reciprocation type electric razor has a power part and a power source part arranged in an outer shell made up of a cylindrical housing 10 and covers 13 and 15 for closing an opening at an end part of the housing. The power part to be housed in the outer shell is made up of a linear actuator 5 which comprises a stator 51 comprising an electromagnet or a permanent magnet, a mobile element 52 having the permanent magnet or the electromagnet and a frame 50 and vibrates the mobile element in reciprocation by the control of energizing the electromagnet. The power part is housed in the outer shell being linked integrally to a base 6 having the power source part mounted thereon and fixed on the outer shell by a screw 18 piercing the cover 15. The power part linked integrally to the base of the power source part has a highly rigid frame thereby eliminating the need for the base.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reciprocating electric shaver, and more particularly to an assembly structure thereof.

[0002]

2. Description of the Related Art In some reciprocating electric razors, a motor as a drive source and a mechanism for reciprocating drive are housed in a cylindrical housing. Such a housing structure
It is often used in waterproof materials because it is advantageous when it has a waterproof structure.

In the case where various parts are assembled in a cylindrical housing, since the parts are individually assembled in the housing, there is a problem in assembling. Therefore, in the case of using the cylindrical housing, the housing is used. It has been practiced to provide a base having a length substantially equal to the total length of the above, and after assembling each component on this base, the whole base is housed in the housing. The fixing of the base is performed at the same time as the fixing of the member closing the end openings by fixing the member closing the end openings and the base with screws or the like at both ends of the tubular housing.

[0004]

By the way, the motor as a drive source in the reciprocating electric shaver and the mechanism for converting the rotation of the motor into reciprocating motion are fixed to each other. Must have a considerable rigidity to suppress the vibration of the base, and accordingly, the base must have an appropriate thickness, and the thickness of the base must be the same as the thickness of the motor and the above mechanical parts. Since the product added with is stored in the cylindrical housing, the thickness as a whole is inevitably increased.

Further, in the waterproof structure, when the switch handle arranged on the surface of the cylindrical housing is used to turn on / off the contact portion in the housing, a cam member having a shaft portion penetrating the housing is provided. Although the cam member is interlocked with the switch handle to open / close the contact portion, in this case, in addition to the cam member, an O-ring mounted on the shaft portion is required, and many parts are required.

The present invention has been made in view of the above points, and an object of the present invention is to use a cylindrical housing to ensure good assemblability and at the same time to use a base. An object is to provide a reciprocating electric razor that does not cause an increase in thickness.

[0007]

According to the present invention, however, a reciprocating device in which a power unit and a power source unit are arranged in an outer shell formed by a cylindrical housing and a cover closing an end opening of the housing. In the electric shaver, the power unit contained in the outer shell is a stator composed of an electromagnet or a permanent magnet, a mover having a permanent magnet or an electromagnet, and a movable part that supports the stator and can reciprocate the mover. A linear actuator that reciprocally oscillates the mover by controlling the energization of the electromagnet, and the power unit is integrally connected to the base on which the power supply unit is mounted and Its main feature is that it is housed and fixed to the outer shell with a screw penetrating the cover.

At this time, it is preferable to insulate the fixing screw of the linear actuator or to connect the linear actuator and the base with a hook that engages in a direction orthogonal to the screw tightening direction. It is also preferable to form the switch by a reed switch provided in the power source section and a magnet provided on a switch handle arranged on the outer surface of the outer shell to operate the reed switch. When a switch is composed of a magnet and a reed switch, the insertion direction of the power supply section into the housing of the outer shell may be opposite to the ON direction of the switch handle, or the same direction. preferable.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of the present invention will be described. The reciprocating electric shaver of the illustrated example is of two types and three types.
The secondary battery 60 is provided with a plurality of blade heads 21 and 22 and a trimmer block 4, and is used for reciprocating the movable blades of the blade heads 21 and 22 and the trimmer block 4.
Is provided with a linear actuator 5 that operates with the secondary battery 60 and the linear actuator 5 housed in the main body 1, and the trimmer block 4 includes the main body 1.
The blade heads 21 and 22 are disposed on the rear side of the main body 1 so as to be slidable up and down, with the outer blade frame 2 interposed therebetween.

The main body 1 here is, as shown in FIGS. 5 and 6, a cylindrical housing 10 having open upper and lower ends.
A pair of side panels 11, 11 respectively arranged on both side surfaces of the housing 10, a lower cover 13 attached to the lower end opening of the housing 10 via a ring member 12 to close the lower end opening, and an upper end of the housing 10. It is formed by a decorative ring member 14 mounted on the outer periphery of the part and an upper cover 15 which is arranged in the upper end opening of the housing 10 through an O-ring 16 and closes the upper end opening. The trimmer block 4 described above is slidably arranged in the above, and the switch handle 3 is arranged on the front side through a front panel 17. In FIG. 5, 30 is a lock member for locking the slide movement of the switch handle 3 up and down, 31 is a lock button cover, 32 is a magnet attached to the back surface of the switch handle 3, 3
3 is a lamp cover. The magnet 32 is for turning on / off a reed switch 35 arranged on the substrate 7 described later, and the lamp cover 32 is for the lamp arranged on the main body 1 to display the capacity of the secondary battery 60. It is a thing.

The outer blade frame 2 includes the upper cover 15 described above.
A hinge 37 that is locked to a fixed spring 36 attached to the upper cover 15 allows it to be opened and closed with respect to the upper cover 15, and a closed state is maintained by locking a removable button 38 that is mounted on the upper cover 15. The outer blade cassette 20 which is detachable from the outer blade frame 2 includes two blade heads 21 and 21 for finishing shaving and a blade head 22 for rough shaving.
And are attached. In the figure, 26 is a blade protection cap, 2
3 is a movable blade in the blade head 21.

Inside the main body 1, the members shown in FIGS. 7 and 8 including the linear actuator 5, the secondary battery 60, etc. are arranged. The linear actuator 5 here includes a frame 50 made of a non-magnetic metal plate and having high rigidity, and a stator 51 fixed to the lower portion of the frame 50.
And two movable elements 52, 52 suspended and supported by leaf springs 53, 53 from both upper sides of the frame 50. The stator 51 is formed as an electromagnet in which a coil is wound around a yoke. The two movers 52, 52 are each formed with a permanent magnet on the lower surface facing the stator 51. Further, the permanent magnets of the two movers 52, 52 are magnetized in the reciprocating direction of the two movers 52, 52, and by switching the direction of the current flowing through the coil of the stator 51 at an appropriate timing, Movable elements 52, 52
The reciprocating vibration can be performed. In the figure, 55 is a mover 52 for controlling the energization timing,
The sensor 55 detects the position, the moving direction, and the moving speed of the moving element 52.
It is used to reciprocate around its natural frequency. The movable elements 52, 52 are provided with connecting portions 54, 54 penetrating the upper cover 15 and protruding upward, and the movable blades 23, 23 are attached to the connecting portions 54, 54. In FIG. 6, 25 is a connecting member between one connecting portion 54 and the movable blade (not shown) of the blade head 22, 24 is a connecting member between the other connecting portion 54 and the movable blade of the trimmer block 4, and 49 is a static member. It is an electric sheet.

The secondary battery 60 is stored in the main body 1 while being attached to the base 6. The base 6, which is housed in the housing 10 together with the linear actuator 5 and the second base 67, has a battery connecting fitting 70 and a battery negative fitting 71 for connecting three secondary batteries 60 in series on one surface thereof. The battery anode metal fitting 72 and the cathode metal fitting 73 are attached, and the substrate 7 on which the drive circuit and the charging circuit for the linear actuator 5 are mounted is held on the other surface. Slits 79 are provided at both ends of the battery cathode fitting 71, the battery anode fitting 72, and the battery connecting fitting 70.

The secondary battery 60 has an anode terminal 61 on its anode side.
However, the cathode terminal 62 is fixed to the cathode side and is covered with the tube 64 and the cap 63. The anode terminal 61 and the cathode terminal 62 are attached to the base 6 by being inserted into the slit 79. And are connected in series. At this time, the three rechargeable batteries 60 are attached to the base 6 in parallel and in parallel so that the anode terminals 61 face downward. As is apparent from FIG. 3, the secondary batteries 60 are mounted in a state of floating from the surface of the base 6, so that the three secondary batteries 60 are in a stacked state.

This is because while keeping the thickness of the main body 1 within a predetermined value D, the overall width W of the main body 1 is reduced to make the main body 1 easy to grip, and the components are mounted on the substrate 7 held by the base 6. To secure space and switch placement space,
When the central secondary battery 60 contacts the inner surface of the housing 10,
This secondary battery 60 is a base 6 that holds the secondary batteries 60 on both sides.
And the inner surface of both sides of the housing 10 by pressing the secondary battery 6
It is intended to prevent rattling of 0.

Although the mounting position of the central secondary battery 60 on the base 6 is slightly different from the mounting positions of the secondary batteries 60, 60 on both sides, the secondary battery 60 on one side and the secondary battery at the center are different. As shown in FIG. 10, the battery connecting fitting 70 for connecting the battery 60 and the battery connecting fitting 70 for connecting the central secondary battery 60 and the secondary battery 60 on the other side are 180 ° The battery connecting fitting 70 has the shape shown in FIG. 9 so that it can be used upside down, that is, the same one can be used.

A second base 67 accommodated on the lower end side of the main body 1.
Are four charging terminals 75, 75, 75, 76 for convenience of penetrating the lower cover 13 (two of which are for charging control).
The charging terminal 76 of these is
When the battery is connected to the charger, it is pushed inside and the secondary battery 6
The power supply connection between 0 and the linear actuator 5 is cut off. Reference numeral 77 in FIG. 7 is a return spring for the charging terminal 76. The hydrogen gas that may be generated from the anode side of the secondary battery 60 during charging has a pipe-shaped anode terminal 61 fixed to the anode side of each secondary battery 60, and the tips of these anode terminals 61 are attached to the lower cover 61. It is designed to be released to the outside by facing the lower surface of. In addition, the anode terminal 6
It is general in this type of waterproof electric shaver that 1 also serves as a charging terminal, but the separate charging terminal 75 is provided so that the same charger can be shared with other electric shavers. This is because

Next, the assembly of the reciprocating electric shaver will be described. The second base 67 is fixed by screws to the lower end of the base 6 to which the secondary battery 60 and the substrate 7 are attached. In addition, the linear actuator 5 is connected to the upper end of the base 6 by hooking hooks 66, 66 projecting from the upper end of the base 6 to the outer surface of the yoke of the stator 51 of the linear actuator 5, as shown in FIG. The blocks shown in are constructed.

Next, the above block is inserted into the housing 10 of the main body 1 from the upper end opening, and the second base 67 and the lower cover 13 are fixed by the screw 19 inserted from the lower cover 13. Further, the upper cover 1 is provided at the upper end opening of the housing 10.
5, the upper cover 15 and the frame 50 of the linear actuator 5 are fixed with screws 18. Then, the waterproof rubber 45 is provided between the through hole provided in the center of the upper cover 15 and the connecting portion 54 of the mover 52 inserted through the through hole.
After mounting, the rubber pressing plate 47 is screwed to the upper cover 15.

Since the upper cover 15 and the lower cover 13 are mounted on the upper and lower opening edges of the cylindrical housing 10, when the covers 15 and 13 are fixed to the block with screws 18 and 19, the upper cover 15 and the lower cover 13 are fixed. At the same time that the block 13 is fixed to the housing 10 at the same time as 13 is fixed to the housing 10, at this time, the linear actuator 5 has high rigidity due to the frame 50. Therefore, the base 6 is not required for the linear actuator 5, so that the thickness of the linear actuator 5 can be reduced. Further, when the screws 18 and 19 are tightened, the hook 6 which is a connecting portion between the linear actuator 5 and the base 6 is connected.
Although a tightening force is applied to 6, 66, since the engaging direction of the hooks 66, 66 with respect to the stator 51 is orthogonal to the tightening force direction, the linear actuator 5 and the base 6 described above are combined. The connection will not be unstable.

By the way, as shown in FIG. 14, the waterproof rubber 45 has a small-diameter portion 45b attached to the connecting portion 54,
A cylindrical step portion 45c is provided in the middle of a tubular portion connecting the peripheral edge portion 45a fixed on the upper cover 15 with the rubber pressing plate 46. By providing the stepwise step portion 45c, the total length L is sufficiently longer than the total height H thereof, so that the stroke of the reciprocating vibration of the mover 52 can be absorbed. FIG. 15 shows another example of the waterproof rubber 45 having the stepped step portion 45c.

Further, the waterproof rubber 45 here covers the head of the screw 18. This is because static electricity or external noise is generated during charging by driving the screw 18, the frame 50 of the linear actuator 5, the coil, and the linear actuator 5. This is to prevent the circuit, the charging terminals 75, 76, and the charger from passing through, so that static electricity and external noise do not damage or malfunction the drive circuit including the microcomputer. Waterproof rubber 45
Although the insulation is performed by the above, it is a matter of course that the insulation of the screw 18 may be achieved by another insulation member.

Further, the rubber pressing plate 46 is shown not only for fixing the peripheral portion of the waterproof rubber 45 but also for preventing the fin ring 14 which is not a perfect ring for disposing the trimmer block 4 from opening. This is done by engaging the claw 47 with an outer recess (not shown) of the fin ring 14. The side panels 11 and 11 are prevented from opening by the fin ring 14 and the ring member 12 which cover the upper and lower ends of the side panel 11, respectively. Further, the upper portion of the linear actuator 5 has an upper cover 1 on which a detachable button 38 and a fixed spring 36 are arranged on the left and right.
The lower part of the linear actuator 5 is located below the O-ring 16 so that the movable element 21 of the linear actuator 5 can have a small operating space and a small vertical dimension.

The block may be incorporated into the housing 10 from the upper end opening side or the lower end opening side of the housing 10, but in the illustrated example, it is the electric opening that is made to be performed from the upper end opening side. The magnet 32 provided on the switch handle 3 is a switch for the razor.
And the reed switch 35 arranged on the substrate 7, and as shown in FIG.
This is because the linear actuator 5 is prevented from operating during assembly in view of the fact that when the magnet 2 is moved upward, the magnet 32 turns on the reed switch 35 to activate the linear actuator 5. That is, the above block provided with the reed switch 35 is attached to the housing 1.
This is because, if it is fitted into the housing 10 from the upper end opening side of 0, the reed switch 35 will not be turned on by the magnet 32 as shown in FIG. However, it does not hinder the assembly of the block from the lower end opening side of the housing 10. In this case, as shown in FIG.
2 causes the reed switch 35 to be turned on, and this point can be used as an operation confirmation.

Although the cylindrical housing 10 is shown here as having both upper and lower ends opened, it may have a bottomed cylindrical shape with only the upper or lower end opened. Further, as the linear actuator 5, it is possible to use one having a permanent magnet on the side of the stator 51 and an electromagnet on the side of the mover 52.

[0026]

As described above, in the present invention, since the linear actuator provided with the frame having high rigidity is used as the power unit, the power unit does not need the base, and therefore the power unit is not required. The arrangement space does not require a space for the base, and the power unit is connected to the base on which the power supply unit is mounted and is housed in the cylindrical housing, which is favorable. The assemblability can be ensured and at the same time the thickness of the base is not increased.

If the fixing screw of the linear actuator is insulated, it is possible to prevent the occurrence of abnormalities due to external noise or static electricity. The linear actuator and the base are tightened in the screw tightening direction. By connecting with a hook that engages in a direction orthogonal to, the base of the power supply unit and the power unit can be easily and firmly integrated, and the reed switch provided in the power supply unit and the outer surface of the outer shell are arranged. When the switch is formed by a magnet provided on the switch handle for operating the reed switch, it is not necessary to mechanically transmit the movement of the switch handle to the inside of the housing, which is advantageous in terms of the number of parts and waterproofing. When a switch is composed of a magnet and a reed switch, if the insertion direction of the power supply unit into the housing of the outer shell is opposite to the ON direction of the switch handle, the switch will turn ON during assembly. It is possible to prevent the occurrence of such a situation, and when the directions are the same, it is possible to confirm the operation by temporarily turning it on during assembly.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an example of an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the same.

FIG. 3 is a horizontal sectional view of the same.

FIG. 4 is a cutaway front view of the same.

FIG. 5 is an exploded perspective view of the above main body.

FIG. 6 is an exploded perspective view of the same.

FIG. 7 is an exploded perspective view of the same.

FIG. 8 is an exploded perspective view of the same.

FIG. 9 is a perspective view of the above battery connecting fitting.

FIG. 10 is a rear view of the above-mentioned base.

FIG. 11 is a front view of the above-described base and linear actuator.

12 (a) and 12 (b) are operation explanatory views of the switch portion of the above.

13 (a) and 13 (b) are operation explanatory views of a switch portion at the time of assembling.

14 (a) and 14 (b) are cross-sectional views of the above waterproof rubber, and FIG. 14 (c) is an explanatory view.

15 (a) and 15 (b) are a longitudinal sectional view and a lateral sectional view of another example of the waterproof rubber.

[Explanation of symbols]

 5 Linear Actuator 6 Base 10 Housing 13 Lower Cover 15 Upper Cover 18 Screw 50 Frame 51 Stator 52 Mover

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Fumiaki Taniguchi 1048 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works Co., Ltd.

Claims (6)

[Claims] 1. A reciprocating electric shaver in which a power section and a power section are arranged in an outer shell formed by a cylindrical housing and a cover closing an end opening of the housing.
The power unit housed in the outer shell includes a stator made of an electromagnet or a permanent magnet, a mover having a permanent magnet or an electromagnet, a frame that supports the stator and reciprocally supports the mover. It is formed of a linear actuator that reciprocally vibrates the mover by controlling the energization of the electromagnet, and the power unit is integrally connected to the base on which the power source unit is mounted and housed in the outer shell to cover the cover. A reciprocating electric razor characterized by being fixed to the outer shell with a screw penetrating through. 2. The reciprocating electric shaver according to claim 1, wherein the fixing screw of the linear actuator is insulated. 3. The reciprocating electric shaver according to claim 1, wherein the linear actuator and the base are connected by a hook that engages with each other in a direction orthogonal to the screw tightening direction. 4. The switch is formed by a reed switch provided on a power source section and a magnet provided on a switch handle arranged on the outer surface of the outer shell to operate the reed switch. Reciprocating electric razor. 5. The reciprocating electric shaver according to claim 4, wherein the power source is inserted into the housing of the outer shell in a direction opposite to the ON direction of the switch handle. 6. The reciprocating electric shaver according to claim 4, wherein the power source is inserted into the housing of the outer shell in the same direction as the ON direction of the switch handle.