JPH05189A - Drive section of reciprocatory electric razor - Google Patents

Abstract

PURPOSE:To provide a drive section excellent in the efficiency of transmitting a force, measures against noises and assembling property. CONSTITUTION:An eccentric shaft 32 rotated eccentrically is connected to a shaft 42 provided on a reciprocatory drive piece 41 through a link 35. The shaft 42 provided on the drive piece 41 is formed of a bifurcate elastic hook having an engaging projection 48 on the tip, while the dividing line is parallel to the link.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive unit for a reciprocating electric shaver, and more particularly to a drive unit for converting the movement of an eccentric shaft for eccentric rotation into a reciprocating movement of a driver.

[0002]

2. Description of the Related Art In transmitting the movement of an eccentric shaft for eccentric rotation to a reciprocating drive element, an E-shaped elastic arm is driven as disclosed in Japanese Patent Publication No. 56-47782. There are one that is formed as a part of the child and has an eccentric shaft connected to this arm, and one that has a shaft protruding from the driver and an eccentric shaft connected by a link.

[0003]

In the former case, there is a problem that the eccentric rotary motion is not efficiently transmitted to the reciprocating motion of the driver due to the deflection of the arm, and the amplitude is attenuated. In the latter case, rattling at the connecting point between the shaft and the link is a cause of noise. The present invention has been made in view of the above points, and an object of the present invention is to provide a reciprocating electric razor drive unit that is excellent in force transmission efficiency and excellent in noise countermeasures and assembly. It is in.

[0004]

SUMMARY OF THE INVENTION In the present invention, however, an eccentric shaft for performing eccentric rotation and a shaft provided on a reciprocating drive element are connected by a link, and the eccentric axis is provided on the drive element. It is characterized in that the shaft is formed by a split elastic hook having a locking projection at the tip and the dividing line is parallel to the link.

According to the present invention, since the shaft is formed as the elastic hook, and the dividing line is made parallel to the link when dividing the shaft into the elastic hooks, the shaft and the link are separated from each other. There is no rattling.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the illustrated embodiments. In this reciprocating electric shaver, two blade heads 1 and 1 are parallel to the upper end of a main body 2 as shown in FIGS. The trimmer blades 6 are arranged in parallel and are vertically movable along the surface of the main body 2, and the trimmer blade 6 is attached to the upper end of the trimmer handle 60.

The blade head 1 arranged on the upper end of the main body 2
5, is attached to the main body 2 via a frame 18 and a holding frame 15, and an outer blade 12 bent in an arch shape is attached to a carrier 10 having a rectangular frame shape. And the two blade heads 1, 1 are housed inside a rectangular frame-shaped holding frame 15, and the carrier 1 in each blade head 1 is
By engaging the projections 11 and 11 projecting from the end surface of 0 with the elastic portions 16 formed in the holding frame 15 and having elasticity in the vertical direction, the double-edged heads 1 and 1 float up and down independently of each other. It is free. Reference numeral 17 in the drawing denotes a hook for detachably locking the holding frame 15 to the frame 18.

On the other hand, inside the main body 2, as shown in FIG. 4, a motor 3 and a driver element 41 for converting the rotation of the motor 3 into a reciprocating motion, a battery 30, etc. are disposed via a mounting base 20. The inner blade 13 that is in sliding contact with the inner surface of the outer blade 12 of each blade head 1, 1 is connected to a pair of connecting cylinders 43, 43 protruding from the upper surface of the driver 41 via push-up springs 44, 44, respectively. There is.

An eccentric shaft 32 is provided on the output shaft of the motor 3 via a base 31, and the eccentric shaft 32 and a shaft 42 projecting from the lower surface of the driver 41 are connected by a link 35. ing. As shown in FIGS. 6 to 8, the shaft 42 here is formed as a halved elastic hook having a large diameter portion 49 at the base end and a locking protrusion 48 at the tip, and is divided for halving. The line is made to be parallel to the link 35, and the link 35 and the shaft 42 can be simply inserted by inserting the shaft 42 into the shaft hole 36 at one end of the link 35.
It is connected without rattling. In particular, since the dividing line is parallel to the link 35, when the link 35 transmits the movement of the eccentric shaft 32 to the reciprocating drive element 41, the direction of transmitting force, that is, the drive element 41.
In the reciprocating direction of the shaft 42, the shaft 42 exhibits rigidity and does not bend, so that the movement of the eccentric shaft 32 is efficient.
It is something that is transmitted to 1.

The recesses 46, 47 provided at both ends of the driver 41, which are sandwiched and fixed between the mounting base 20 and the inner surface of the main body 2 by the screws 39, have projections 201, 202 projecting from the mounting base 20. Is about to be engaged.
In FIGS. 4 and 5, reference numeral 25 is a metal fitting for receiving the hinge plate 26 attached to the frame 18, and 27 is the hinge plate 2.
A hook for locking the other end of the frame 18 whose one end is rotatably connected to the main body 2 by 6, a spring 28 for urging the hook 27, and a driver 41, 42 in the main body 2. The packing 71 for dust-proofing the upper surface opening through which each of the connecting cylinders 43 is inserted, and 71 is a metal fitting for the packing 70. The screw 39 for fixing the driving element 41 also serves as a fixing for the pressing metal fitting 71. Further, 7 in FIG. 2 is a switch handle.

The trimmer blade 6 is, as described above, a trimmer handle 6 which is arranged on the surface of the main body 2 so as to be vertically slidable.
It is provided at the upper end of 0, and the trimmer driver 62 is axially supported by the shaft 61 protruding from the back surface between the cover 63 and the cover 63 attached to the back surface of the trimmer handle 60. The trimmer driver 62 has a lower end engaging portion 620 protruding backward from an elongated hole 630 provided in the cover 63 and an upper end connected to a movable blade of the trimmer blade.
When the trimmer handle 60 is moved upward, the driver 41
The lower end engaging portion 63 engages with the joint 45 attached to the connecting cylinder 43, and the reciprocating motion of the driver 42 is transmitted to the movable blade.

[0012]

As described above, in the present invention, since the shaft is formed as the elastic hook, rattling does not occur between the shaft and the link, there is no noise, and the assemblability is improved. It is excellent, and because the dividing line is parallel to the link when dividing the shaft into elastic hooks, the shaft exhibits rigidity in the direction in which the link transmits the movement of the eccentric shaft to the driver. Although it is an elastic hook, the flexure of the shaft does not pose a problem and the transmission efficiency is excellent.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

FIG. 2 is a vertical sectional view.

FIG. 3 is a cross-sectional view.

FIG. 4 is an exploded perspective view.

FIG. 5 is an exploded perspective view of a blade portion.

FIG. 6 is a perspective view of a shaft and a link.

FIG. 7 is a front view of a shaft.

FIG. 8 is a sectional view of the shaft.

[Explanation of symbols]

 32 eccentric shaft 35 link 41 driver 42 axis

Claims (1)

Claim: What is claimed is: 1. An eccentric shaft for eccentric rotation and a shaft provided on a reciprocating drive element are linked by a link, wherein the shaft provided on the drive element is at the tip. A drive unit for a reciprocating electric shaver, characterized in that it is formed by a split elastic hook having a locking projection, and the dividing line is parallel to the link.