JPS6148392B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an electric shaver, and particularly to a main body that includes an outer cutter, an inner cutter that slides on the inner surface of the outer cutter, a movable case equipped with a motor that drives the inner cutter, and a built-in power supply. The present invention relates to an electric shaver comprising a case and a movable case that is rotatable relative to the main body case.

[Background technology]

The first electric shaver of this kind was in the 1970s.
There is one shown in Publication No. 48871. This has a pair of arms erected from the main case, which has a built-in battery power source, and a movable case attached to the tips of both arms via a shaft, allowing the movable case to rotate freely around this shaft. It is said that By the way, since the battery power source is inside the main case and the motor that drives the inner blade is inside the movable case, there is no need to provide a member to electrically connect the two at the joint between the movable case and the main case. Must not be. For this reason, when making this electric shaver waterproof, it is difficult to waterproof the connecting parts, and as a waterproof type, Japanese Patent Laid-Open No. 56
There was only one in which the power supply, motor, and other components were housed in one housing, such as the one shown in Publication No. 70787.

[Purpose of the invention]

The present invention has been made in view of the above points,
It is an object of the present invention to provide an electric shaver which has an easy-to-use oscillating function and is waterproof so that it can be washed with water.

[Disclosure of the invention]

The present invention rotatably connects a main body case with a built-in power supply and a movable case equipped with a motor, and an annular sealing means is interposed in the connecting rotation shaft, so that a sealed case inside the movable case is provided. It is characterized in that the motor storage chamber and the sealed interior of the main body case are communicated through a space surrounded by the sealing means, and electrical connection parts between the motor and the power source are arranged in the space surrounded by the sealing means. It was designed to do so.

To describe the present invention in detail with reference to embodiments, in the figure, 1 is a main body case, 2 is a movable case, and the main body case 1 has a main body 11 with arm parts 13, 13 erected at positions near the rear of both ends of the upper surface, respectively. , a box-shaped battery holder 3 with an open bottom that fits onto the bottom surface of the main body 11 and is fixed with a tapping screw 20;
and a battery cover 12 which is box-shaped with an open top and is attached to the bottom surface of the main body 11 while covering the battery holder 3. The movable case 2 is rotatable with respect to the main case 1 by being pivotally supported at positions near the back on both sides. The movable case 2 is a motor housing 21
The blade mount 22 is attached to the front opening of the motor housing 21, and the outer blade frame 23 is attached to the blade mount 22. An inner cutter base 24 is attached to the output shaft passing through the joint 60 via a joint 60, and an inner cutter (not shown) attached to the meat cutter base 24 is attached to the inner surface of the net-shaped outer cutter 9 provided on the outer cutter frame 23. comes into contact. The inner cutter, which is rotationally driven by the motor 5, comes into sliding contact with the inner surface of the outer cutter 9.

Now, the pivot structure of the movable case 2 with respect to the main body case 1 is as follows.
That is, flat parts are provided on both sides of the bottomed cylindrical motor housing 21 in the movable case 2, and a boss 56 having a shaft insertion hole in the flat part and a boss 5 are provided.
6, and an approximately 90° arc-shaped groove 53 continuous to the outer periphery of the annular groove 52. A groove 57 is provided on the inner surface of the motor housing 21. The support shaft 6 that passes through the shaft insertion hole of the boss 56 is made of a conductive material and has a rectangular portion 68 at the base end and a square shaft 69 at the tip. 57, the support shaft 6 is attached to the motor housing 21 so as not to rotate around the shaft.

On the other hand, a pair of arm portions 1 in the main body case 1
3 forms a semicircular space between them, but both arm portions 13 are hollow, and inside there are a contact spring 37, a rotating plate 41, and a conductive plate 42, respectively.
and are provided. A bearing hole 58 and an annular rib 14 surrounding the bearing hole 58 are provided on opposing surfaces of both arm portions 13.
and a protrusion 15 protruding from the annular rib 14 in the outer circumferential direction.
and is provided. The support shaft 6 is connected to this bearing hole 5.
At this time, the annular rib 14 of the arm part 13 is inserted into the annular groove 52 of the movable case 2, and at the same time the annular rib 14 of the arm part 13 is inserted into the arc groove 53. Since the protrusion 15 is located and the range of movement of the protrusion 15 is restricted by the arcuate groove 53, the range of rotation of the movable case 2 relative to the main case 1 is set such that the outer cutter 9 faces the front and the outer cutter 10 faces upward. It is said to be within approximately 90 degrees of the position where the object is facing.

Electrical connection between the support shaft 6 and the battery 4 as a power source is made by a battery contact plate 3 attached to the battery holder 3.
2, 34, a contact spring 37 and a conductive plate 42 disposed within the arm portion 13. The battery holder 3 is box-shaped with an open bottom and stores two AAA batteries 4 in parallel.A current-carrying metal fitting 39 is attached to one end of the inner surface, and a contact plate for each battery is attached to the other end of the inner surface. Both battery contact plates 32 and 34 are fixed to the upper surface of the battery holder 3 by heat sealing, and each of the above-mentioned pieces is provided on the upper surface of one end of the battery holder 3. The battery contact plate 34 contacts the cathode of one battery 4 and the battery contact plate 32 contacts the anode of the other battery 4 through a pair of holes 65, 65. Here, the battery contact plate 32 has a protrusion 35 rising upward from the other end of the battery holder 3.
In addition, the battery holder 3
A pair of spring pieces 33, 33 protrude inside the battery holder 3 from holes 62 provided on both sides of the center in the left-right direction.
It is equipped with These spring pieces 33, 33 are in contact with the circumferential surfaces of the two ponds 4, 4 as shown in FIG. This is to prevent the battery 4 from falling out from the battery holder 3 whose bottom surface is open. In the illustrated example, both ends of the holding fitting 36, which is fixed to the upper surface of the battery holder 3 together with the battery contact fitting 32 by heat sealing, are passed through the hole 62 and the opening 64 provided on the circumferential surface of the battery holder 3, so that the battery holder 3 A protruding rib 16 is protruded from the opening edge of the upper surface, and this protruding rib 16 forms a groove 17 on the lower surface of the main body 11.
In the engagement recess 66 on the inner surface of the battery cover 12,
Both ends of the holding fitting 36 are engaged.

Now, like the battery contact plate 32, the battery contact plate 34 is also provided with a protrusion 35 that rises upward. On the other hand, the contact spring 37 is placed inside the main body 11 by press-fitting both sides of its base, and has a cut-out piece 40 at the base, which allows the battery holder 3 to be screwed onto the boss 18 of the main body 1. When fixing with the tapping screws 20, each protrusion 3 of the battery contact plates 32, 34
5, 35 are inserted between the base and the cut and raised piece 40 as shown in FIG.
A pair of contact springs 37, 37 are electrically connected to 34, respectively. The upper end of the contact spring 37 disposed in each arm portion 13 is connected to a pair of opposing contact springs 3, respectively.
It has a bifurcated shape with 8 and 38 points. The conductive plate 42 makes an electrical connection between the contact spring 38 and the support shaft 6, but it is connected to the rotating plate 41.
The arm portion 13 is fixedly fixed to the arm portion 13 and housed within the arm portion 13.
The rotary plate 41 is fitted with a square shaft 69 at the tip of the support shaft 6 fixed to the movable case 2 and rotates together with the support shaft 6, and is located between the pair of contact pieces 38, 38. Here, the conductive plate 42 includes a piece located on the inner peripheral surface of the fitting hole with the square shaft 69 at the center of the rotary plate 41 and in contact with the square shaft 69, and a piece located on the outer peripheral surface of the rotary plate 41 that contacts the click recesses 44, 44. The click recesses 44, 44 have a pair of pieces forming a rotary plate 4.
It is located 180 degrees off the outer circumference of 1. The rotary plate 41 made of an insulating material has a pair of click recesses 4 on its outer circumferential surface which are offset by 90 degrees from the click recesses 44.
3, 43, and when the movable case 2 has its outer blade 9 facing forward, a pair of contact pieces 38, 3 on the contact spring 37 as shown in FIG.
8 are click recesses 43, 43 of the rotating plate 41.
When the movable case 2 is rotated 90 degrees and the outer cutter 9 is directed upward, the rotary plate 41 also rotates, so both contact pieces 38, 38 fit into the click recesses 44, 44 of the conductive plate 42. Contact spring 37 and support shaft 6
and are electrically connected. On the other hand, since the pair of support shafts 6 and both terminals of the motor 5 are always electrically connected by the pair of energizing springs 46 as described later, the support shaft 6 and the contact spring 37 are connected at all times. The above configuration via the conductive plate 42 is the motor 5.
The movable case 2 as a whole functions as the operating section of the switch.

Next, the above-mentioned energizing spring 46 will be explained.
A pair of energizing springs 46, 46, which electrically connect the pair of support shafts 6, 6 and a pair of terminals on the back surface of the motor 5, also serve as mounting members on the back surface of the blade mount 22 of the motor 5. This energizing spring 46 has an engaging portion 48 at one end that hooks onto a protrusion 71 protruding from the inner surface of the back of the blade mount 4.
As shown in FIG. 6, the locking holes 50 are arranged on the flat parts on both sides of the motor 5, and as shown in FIGS. 9 and 10, the locking holes 50 are provided on the other end. The motor 5 is attached to the blade mount 22 by being engaged with a protrusion 72 made of an insulating material that is formed to protrude. A contact piece 49 provided at the other end and formed in an arc shape to provide spring properties comes into contact with a terminal protruding from the back surface of the motor 5. The energizing spring 46 and the support shaft 6 are electrically connected by a contact protrusion 47 located on the side surface of the motor 5 of the energizing spring 46 contacting the support shaft 6 . In the figure, 45 indicates the outer surface of the motor 5 and a pair of energizing springs 4.
6. This is an insulating plate interposed between 6 and 6. In this way, the motor 5 fixed to the back of the blade mount 22 and the blade mount 22 are fixed to the front opening edge of the motor housing 21 to be housed in the motor housing 21. Here, the motor housing 21 is In order to miniaturize the motor 5, the inner diameter is made approximately equal to the outer diameter of the motor 5, and the contact space between the energizing spring 46 and the support shaft 6 is secured by forming a flat part on the outer peripheral surface of the motor 5. As is clear from FIG. 5, since the member forming the groove 57 into which the rectangular portion 68 of the support shaft 6 is fitted is projected, it is difficult to attach the blade mount 22 to which the motor 5 is fixed to the motor housing 21. The structure is a bayonet connection that requires only a few rotations of the blade mount 22. That is, several bayonet protrusions 73 are attached to the blade mounting base 22.
The motor housing 21 is provided with several bayonet grooves on the inner circumferential surface, each consisting of an insertion groove 54 opening at the front opening edge and a coupling groove 55 having one end connected to the insertion groove 54. Insert each bayonet protrusion 73 into the insertion groove 54, and then
2 is slightly rotated to move the bayonet protrusion 73 into the coupling groove 55, the blade mount 22 is fixed to the motor housing 21, and this rotation causes the energizing spring 4 to move.
The contact protrusion 47 of No. 6 moves from the position shown by the imaginary line in FIG. 5 to the contact position with the support shaft 6 shown by the solid line. In the illustrated example, a decorative ring 25 is placed over the outer periphery of the front opening edge of the motor housing 21.
A leg piece 51 that is inserted into an insertion groove 54 in the bayonet groove is protruded from the bayonet groove, and the existence of this leg piece 51 prevents the blade mount 22 from coming off from the motor housing 21 unless the decorative ring 25 is removed. I have to. The reference numeral 7 shown in FIG. 4 is a cap for protecting the outer blade. It has a protrusion 77 that engages with the recess 19 formed therein.

Next, the waterproof structure will be explained. This electric razor can not only be used in the bathroom, but also allows you to shave your beard with soap on your skin.
In addition, it is possible to wash the inner blade and the hair shavings that have accumulated inside it with water, and for this reason it has a waterproof structure.
The storage chamber for the motor 5 surrounded by the blade mounting base 22
The blade is sealed by an O-ring 29 interposed between the outer circumferential surface of the back and the inner circumferential surface of the motor housing 21, and a buckle 28 with an M-shaped cross section located at the center of the blade mount 22 and passing through the output shaft of the motor 5. ing. The inside of the main body case 1 is sealed by an O-ring 31 that is placed in a groove formed in a flange 63 provided on the battery holder 3 on the outer periphery of the lower end of the main body 11 and contacts the inner peripheral surface of the battery cover 12. The sealed spaces between the motor storage section in the movable case 2 and the inside of the main body case 1 are communicated through the inside of an O-ring 30, which is an annular sealing means arranged around the support shaft 6. be. As is clear from FIGS. 5 and 6, this O-ring 30 is connected to the outer peripheral surface of the boss 56 in the movable case 2,
Annular rib 1 in arm portion 13 of main body case 1
The movable case 2 is located between the inner peripheral surface of the movable case 2 and the inner circumferential surface of the main body case 1, and waterproofs the connecting portion between the movable case 2 and the main body case 1.

On the other hand, the outer blade frame 23 in the movable case 2
An inner blade storage chamber between the blade mounting base 22 and the outer blade holder 22 is provided on the outer circumferential surface of the movable case 2 so that the inside can be washed with water with the outer blade 9 attached, that is, without removing the outer blade frame 23. It communicates with the outside through an opening. This opening is an opening 26 shown in FIG. 4 formed on the front peripheral surface of the blade mount 22.
and a notch 59 shown in FIG. 2 formed in the front opening edge of the motor housing 21 located on the outer periphery of the motor housing 21, and hair shavings are not allowed to exit from this opening except when washing with water. The opening can be opened and closed to prevent it from coming out. Here, the opening is closed by the operating handle 27 itself, which is guided by a groove 75 formed on the bottom surface of the notch 59 in the motor housing 21 and the inner surface of the decorative ring 25, as shown in FIG. A sliding handle 27 is aligned with the opening 26 to close it, and positioned to the side of the opening 26 to open it. A spring piece 76 that provides a click against sliding between the handle 27 and the blade mount 22 is attached to the handle 27.
It is formed integrally with the When washing with water,
The movable case 2 is raised, the motor 5 is energized, the handle 27 is operated to open the opening as shown in FIG. 11, and a water stream is applied to the outer cutter 9 as shown in FIG. 12. Water that enters the inner cutter storage chamber through the hole in the outer cutter 9 is circulated around the entire surface of the inner cutter storage chamber by the rotating inner cutter and the inner cutter base 24, and is then discharged through the opening 26. At this time, the internal shavings, etc. are washed out.

〔Effect of the invention〕

In the present invention, as described above, an annular sealing means is interposed in the rotary connecting shaft between the main case and the movable case, and each sealed space in the movable case and the main case is surrounded by the sealing means. Therefore, the power supply inside the main case and the motor inside the movable case can be connected without compromising waterproofness. By adding functionality, it is possible to have a washing function with water.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention, FIGS. 2 and 3 are exploded perspective views of the same, FIG. 4 is a vertical sectional view of the same, FIG. 5 is a cutaway front view of the same, and FIG. is the fifth
A sectional view taken along the line X-X in the figure, FIGS. 7 and 8 are longitudinal sectional views of the arm portion of the above, and FIGS. 9 and 10 are a cutaway side view and rear view of the blade mount and motor of the above,
11 and 12 are a front view and a side view showing the same condition when washed with water, in which 1 indicates the main body case;
2 is a movable case, 4 is a battery as a power source, 5 is a motor, and 30 is an O-ring as annular sealing means.

Claims (1)

[Claims] 1 Consists of an outer cutter, an inner cutter that slides on the inner surface of the outer cutter, a movable case equipped with a motor that drives the inner cutter, and a main case with a built-in power supply, and the movable case is rotatably connected to the main case. An annular sealing means is interposed in the rotation shaft connecting the main body case and the movable case, and the sealed motor storage chamber in the movable case and the sealed main body case are connected by the sealing means. An electric razor characterized by communication through an enclosed space.