JPH0646461Y2 - Rotary electric razor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement of a rotary electric shaver, in which an attaching / detaching means of the rotary inner blade is improved.

[Conventional technology]

As a rotary type electric shaver that allows the rotary inner blade to be detached in order to replace and clean the rotary inner blade of this kind, for example, Japanese Utility Model Publication No. 48-42304 and Japanese Patent Publication No. 56-104689. There is something like that shown in.
In the former type, the rotary shaft is laterally supported by the main body case, the final stage gear of the multistage gear that transmits the rotation of the motor is fixed to one end of the rotary shaft, and the rotary inner blade can be freely inserted and removed at the coaxial other end. It is supposed to fit. In the latter type, the rotary inner blade is not supported by a single common shaft in the main body case, but is supported by both left and right separate shafts, and the rotation of one of the left and right motors is received via a multi-stage gear to rotate. On the other hand, the other shaft is a driven shaft that can move in the axial direction, and the rotary inner blade can be inserted into and removed from these two shafts, and by operating the driven shaft to move outward in the axial direction. The rotary inner blade can be removed from both shafts.

[Problems to be solved by the device]

In any of the above-mentioned conventional examples, the rotary inner blade can be freely inserted into and removed from the shaft that supports it, but at the time of this insertion and removal, the rotary inner blade will be grasped with a fingertip,
At this time, there is no choice but to grab the cutting edge of the peripheral surface, so there is a risk of cutting the fingertip with the cutting edge, and there is a great danger especially in the case of a sharp edge, and the hand that the cutting edge adheres to There is some difficulty in handling, such as causing rust due to sweat or oil. Further, in order to allow the rotary inner blade to be easily inserted into and removed from the shaft, it is particularly necessary to facilitate the insertion and removal because there is a relationship of grasping the cutting blade by hand as described above. A certain amount of clearance is required between the bearing hole of the rotary inner blade and the shaft. However, if the clearance is too large, the rotary inner blade tends to rattle, and it is difficult to achieve stable rotation.

Further, in the former case of the former case, since the rotary inner blade is supported by the shaft in a cantilever manner, the rotational runout is likely to occur. Also, in the latter conventional example, the rotary inner blade is supported by both left and right shafts, but if axial misalignment occurs in both shafts, rotational runout is likely to occur even in this case, and both shafts are on the same axis. It is difficult to control the accuracy and to assemble the workability easily.

The present invention has been made to solve these problems, and in the rotary electric shaver as described above,
By devising a device for attaching / detaching the inner blade of the rotary, the safety and simplification of the attaching / detaching operation of the inner blade of the rotary are achieved, and the rotation of the inner blade of the rotary is stabilized.

[Means for Solving the Problems]

In the rotary electric shaver of the present invention, for example, as shown in FIG. 1, a rotary inner blade 20 is provided with a rotary shaft 17 and a shaft 17.
The bearing bosses 19 that support both ends of can be detached together. Therefore, the rotary inner blade 20 and the rotary inner blade
The rotary shaft 17 protruding from both ends of the shaft 20 and the left and right bearing bosses 19 supporting both ends of the shaft 17 are integrally combined to form the inner blade unit 13, while the left and right supported inside the main body case 1 are formed. Of the inner blade support frame 10 of the upper end 10a of the main body case 1 is projected upward from the upper end 10a
The bearing boss 19 of the inner blade unit 13 is detachably coupled to the. A multi-stage gear that transmits the rotation of the motor 14 in the main body case 1 to the rotary shaft 17 is rotatably supported on one of the left and right inner blade support frames 10 and the final stage gear 21 of the multi-stage gear is on the frame 10. Is fixed on the end of the rotary shaft 17 facing the inside of the bearing boss 19 and the final stage gear 21 can be engaged with and disengaged from the intermediate gear 34 of the multistage gear as the bearing boss 19 is attached and detached. It has been meshed like this.

[Action]

At this time, the left and right bearing bosses 19 of the inner blade unit 13 are separated from the respective upper end portions 10a of the left and right inner blade support frames 10 to make the bearing bosses 19, the rotary shaft 17 and the final stage gear.
The rotary inner blade 20 as well as the rotary inner blade 20 can be removed from the main body case 1 and used for cleaning or replacement. After cleaning the rotary inner blade 20 or the new rotary inner blade 20, the left and right bearing bosses 19 are coupled to the respective upper end portions 10a of the left and right inner blade supporting frames 10 so that the final stage gear in the bearing boss 19 is connected. 21 is meshed with the intermediate gear 34 and is drivably mounted.

[Effect of device]

In the rotary electric shaver of the present invention, a rotary inner blade 20 is integrally assembled with a rotary shaft 17, left and right bearing bosses 19 and a final stage gear 21 to form an inner blade unit 13, and a main body case 1
In contrast, the bearing boss 19 of the inner blade unit 13 is attached to and detached from the upper end portion 10a of the inner blade supporting frame 10. Therefore, since the left and right bearing bosses 19 can be sandwiched and held by the thumb and the other fingers when attaching and detaching the bearing bosses 19, the rotary inner blade 20 can be safely and easily attached and detached in a gripping state without touching the blade edge. Also, it can prevent sweat and oil from sticking to the blade edge, and has excellent workability for cleaning and replacement. Further, since the rotary inner blade 20 is detachably attached to the main body case 1 together with the rotary shaft 17 and the bearing boss 19, the rotary inner blade 20 has a space between the rotary shaft 17 and the bearing in the bearing boss 19. When setting the size of the clearance, it is possible to set the clearance as small as possible without considering the workability of inserting and removing the rotary inner blade 20 to and from the rotary shaft 17 in the conventional detaching / attaching mode. It is possible to pre-assemble in a stable and good rotating state without sticking and the like, and it is possible to improve the assembly accuracy and the rotating performance of the rotary inner blade 20. Further, there is also an advantage that the rotary performance of the rotary inner blade 20 can be easily tested before being assembled to the main body case 1. Furthermore, since the inner blade unit 13 protects the last stage gear 21, which is the most important for driving, by covering it with the bearing boss 19, even when this unit 13 is sold as a replacement part,
There is no possibility of damaging the final stage gear 21 during transportation or replacement.

〔Example〕

An embodiment of a rotary type electric shaver according to the present invention
A description will be given with reference to FIGS.

In FIG. 2, in the lower half part of the main body case 1 thereof,
The circuit board 2 and the rechargeable battery 3 are incorporated, and the charging plug 4 is attached to the bottom of the case.

On the upper part of the main body case 1, a knit-shaped outer blade 5 is mounted via a holder 6 while being curved in an arch shape. The right wall portion of the holder 6 of the outer blade 5 is engaged with and supported by a locking claw 7 provided at the upper right end of the main body case 1, and the left wall portion is projected and retracted at the upper left end of the main body case 1 via a spring 8. It is engaged and supported by a locking claw 9 with a knob that is freely mounted. Therefore, when the left side locking claw 9 is pushed against the spring 8, the holder 6 can be removed from the main body case 1 together with the outer blade 5.

Left and right inner blade support frames 10 in the upper half of the body case 1
10 is installed so that the upper end portions 10a, 10a thereof project upward from the slit 12 of the upper wall 11 of the main body case 1 having an upwardly convex cross-section, and the inner surface of the outer blade 5 is provided between the upper end portions 10a, 10a. An inner blade unit 13 having a rotary inner blade 20 that rotates in sliding contact with one another is laterally supported, and a motor 14 in the frame 10 and a multi-gear inner blade for transmitting the rotation of the motor 14 to the inner blade unit 13. A drive mechanism 15 is installed.

The inner blade unit 13 includes a rotary inner blade 20 and a rotary inner blade 20.
The rotating shaft 17 inserted and fixed in the
The right and left bearing bosses 19 that are rotatably supported via 18 are integrally combined, and the right end of the rotary shaft 17 facing the right bearing boss 19 has the final stage of the inner blade drive mechanism 15 to be described later. The gear 21 is fixed, and the lower portion of the peripheral surface of the gear 21 is fixed to the bearing boss 19
Facing the lower opening 22 of the.

The left and right inner blade support frames 10 and 10 are made of zinc die cast or the like, and the bottom parts thereof are integrally joined by a frame bottom plate 23 to be assembled into a U-shape in a front view.
Upper and lower support members elastically deformable in the vertical direction on the bottom side of the
24.25 are integrally overlapped and connected with a screw 26, and the left and right end portions 24a, 24a, 25a, 25a of both supporting members 24.25 are fixed to the inner wall of the main body case 1 to be attached to the main body case 1. On the other hand, the inner blade supporting frame 10 is supported so as to be movable up and down, and the lower supporting member 25 and the spring bearing 27 in the main body case 1 are supported.
The inner blade support frame 10 is constantly pushed upward by the spring 28 hung between
20 is always in close contact with the inner surface of the outer blade 5.

Regarding the inner blade drive mechanism 15, the power source motor 14 is coupled to the bottom surface side of the lower support member 25 by using the screw 26, and a shaft protruding from the upper end of the motor 14 to above the support member 25.
The output gear 30 is fixed to 29, and the input gear 32 fixed at the axial center of the driving shaft 31 that is laid above the frame bottom plate 23 between the inner blade supporting frames 10 and 10 is made orthogonal to the output gear 30. A gear 33 meshed with and fixed to the shaft end on the right side of the drive shaft 31 is a final stage gear 21 fixed to the shaft end of the rotary shaft 17 and an intermediate gear supported in multiple stages on the inner blade support frame 10 on the right side. It is transmitted through the 34th group (see Fig. 3).

The left and right bearing bosses 19, 19 of the inner blade unit 13 are detachably coupled to the respective upper end portions 10a, 10a of the left and right inner blade supporting frames 10, 10. As a concrete connecting means, as shown in FIG. 4, the notch joints 35 and 36 joined to each other at the upper end portion 10a and the lower portion of the bearing boss 10 are projectingly provided, and the joint 35 at the upper end portion 10a is screwed. The screw holes 38 into which 37 are screwed are formed in the joint 36 of the bearing boss 19 and the holes 39 through which the screws 37 pass, respectively.
36 are joined together and the screw 37 is fixed by screwing the screw 37 into the screw hole 38 from the hole 39. However,
A hole 39 and a screw hole 38 are formed in the joint 36 of the right bearing boss 19 containing the final gear 21 and the joint 35 of the right upper end portion 10a joined with the final stage gear 21 and the intermediate gear.
It goes without saying that it will be installed at a position away from 34.

In FIG. 3, a switch operation knob 40 is mounted on the front side of the main body case 1 so as to be slidable in the vertical direction, and the vertical sliding allows the connection between the motor 14 and the battery 3 to be interrupted.

Now, when the motor 14 and the battery 3 are connected by the slide operation of the switch operation knob 40, the motor 14 rotates, and this rotation is transmitted to the rotary shaft 17 via the inner blade drive mechanism 15, and the rotary inner blade 20 is rotated by the rotary shaft 17. Sliding contact rotation with the inner surface of the outer blade 5 around the rotation axis 17.

To clean the rotary inner blade 20 or to replace it with a new one, remove the outer blade 5 together with the holder 6 from the top of the main body case 1 and then remove the screw 37 to remove the rotary inner blade 20. Together with the rotary shaft 17, the bearing boss 19 and the final stage gear 21, the upper end 10 of the inner blade support frame 10
Can be removed from a. At this time, rotary inner blade 2
Since 0 has bearing bosses 19 and 19 integrally at both ends of this, it is possible to hold this bearing boss 19 and 19 with your thumb and other fingers and directly touch the cutting edge of the rotary inner blade 20. No, it can be safely removed.

Rotary inner blade 20 after cleaning or new rotary inner blade 20
The left and right bearing bosses 19 ・ 19 of the inner blade support frame 10
The final stage gear 21 can be attached to the main body case 1 in a state of meshing with the intermediate gear 34 by joining the upper end portions 10a of the 10 and the screws 37 and tightening the screws 37. Even at the time of this mounting, there is no danger of cutting a hand with the cutting edge of the rotary inner blade 20, and the bearing bosses 19 and 19 on the left and right can be clamped and mounted safely.

In FIG. 3, a hair tray 41 and a shaving blade 42 are vertically arranged on the rear surface side of the main body case 1. As shown in FIG. 2, the bristle tray 41 is located between the upper end portions 10a, 10a of the left and right inner blade supporting frames 10, 10 just below the rotary inner blade 20 and on the convex portion 11a of the upper wall 11 of the main body case 1. In contrast, it is slidable in the front-back direction and can be pulled out backward. In addition, the gap between the slit 12 of the upper wall 11 of the main body case 1 and the inner blade support frame 10, 10 is closed by a bristle plate 43 made of rubber or the like, and the dust that falls from the rotary inner blade 20 is the main body. The inside of the case 1 is prevented from entering.

[Another embodiment]

In the above embodiment, the bearing boss 19 of the inner blade unit 13 and the upper end portion 10a of the inner blade support frame 10 are detachably coupled with the screw 37, but both can be detached without using the screw 37. It may be combined. For example, as shown in FIG. 5, a joint projection 44, which can be expanded and contracted by its elasticity, is provided at the lower portion of the bearing boss 19 of the inner blade unit 13, and the joint projection 44 of the inner blade support frame 10 is provided. The joint hole 45 provided in the upper end portion 10a may be press-fitted into the joint hole 45 by utilizing its elasticity so as to be freely inserted and removed.

[Brief description of drawings]

1 to 4 show an embodiment of a rotary electric shaver according to the present invention, and FIG. 1 is a front view showing the outer blade and the inner blade unit removed from the upper part of the main body case. , Fig. 2 is a vertical sectional front view in the assembled state,
3 is a sectional view taken along the line AA in FIG. 2, and FIG. 4 is a perspective view showing the inner blade unit and the upper end portion of the inner blade support frame in a separated state. FIG. 5 is a vertical cross-sectional front view of the essential parts of another embodiment of the present invention. 1 …… Main body case, 5 …… Outer blade, 10 …… Inner blade support frame, 10a …… Upper end of inner blade support frame, 11 …… Upper wall of main body case, 14 …… Motor, 17 …… Rotating shaft , 19 …… Bearing boss, 20 …… Rotary inner blade, 21 …… Final stage gear, 34 …… Intermediate gear.

Claims (1)

[Scope of utility model registration request] 1. An inner blade 5 having an arch shape is detachably mounted above an upper wall 11 of a main body case 1, and a rotary inner blade 20 is slidably contacted with an inner surface of the outer blade 5 to rotate.
And a rotary shaft 17 protruding from both ends of the rotary inner blade 20,
The left and right bearing bosses 19 supporting both ends of the rotary shaft 17 are integrally combined to form the inner blade unit 13, and the left and right inner blade support frames 10 supported in the main body case 1 are formed.
The upper end portions 10a of the main body case 1 are protruded upward from the upper wall 11 of the main body case 1, and the bearing boss 19 of the inner blade unit 13 is detachably coupled to the upper end portion 10a of the main body case 1. Body case 1 on one of the frames 10
The multistage gear that transmits the rotation of the motor 14 inside to the rotary shaft 17 is supported, and the final stage gear 21 of the multistage gear is the frame 10
The rotating shaft 17 which is covered with the upper bearing boss 19 and faces the inside of the bearing boss 19.
The rotary electric shaver is characterized in that the final stage gear 21 is engaged with the intermediate gear 34 of the multistage gear so as to be engaged and disengaged as the bearing boss 19 is attached and detached.