JPS5861777A - Electric razor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric shaver, particularly an electric shaver that is equipped with a reciprocating blade section and that can be used by replacing the head section, each of which has blade sections that operate in different directions of reciprocating motion. This is related to shi.

In the case of the above configuration, the member for converting Tanabata rotation into reciprocating motion is provided on the head side, but in this case, the following problems arise. That is, as shown in Fig. 9, on the main case side where the Tanabata is housed, a pair of bushings 1l) (72) fixed to the output shaft (3) of the Tanabata are driven. The shaft (73) is mounted so that it can move vertically and transmit rotation, and the spring (2++) springs the drive shaft (3) upward.On the other hand, on the head side, the shaft (73) is fitted with the drive shaft (73). The connecting rod □□□ to be connected is supported by a bearing bracket, and a component suitable for switching to the direction of reciprocating motion that requires rotation at 0, in the illustrated example, an eccentric shaft and 0-ra C271 are used. By providing 0, the drive shaft 3)
Compared to the case where an eccentric shaft (b) etc. is directly attached to the shaft, it is necessary to align the rotation center of the output shaft V4 and the eccentric shaft (sha) with the axis of the connecting rod. Head part (2
) side, which is supported by a unique bearing 9, and the output shaft 4 on the main body case (1) side, to which this head part (2) is removable, are aligned. Part (2
) and the main body case (1) are impossible in terms of variations in parts and assembly accuracy.

Therefore, the drive shaft and connecting culm may fall due to shaft center runout or eccentricity, resulting in zero drive speed and noise. Also, bearings are required, and the frictional resistance between the bearing and the connecting culm also has an effect. give.

The present invention has been made in view of these points, and its purpose is to provide a member for converting rotation into reciprocating motion on the side of the head that can be attached and detached from the main body case. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention, which aims to provide an electric shaver with little drive loss between the output shaft of the case side and the conversion member, will be described in detail based on illustrated embodiments.

Figure 1 shows the external appearance, and above the main body case (1) there is a head part (2
) is provided. As shown in FIGS. 2 and 3, batteries α and T are arranged in series in the axial direction in a thin cylindrical main body case (1) to which a battery cover 09 is attached to the lower opening. ing. 06) is a battery holder, (63)
is the Tanabata push-up spring, (6 is the anode terminal, ((g) is the battery contact metal fitting, ((to) is the contact metal fitting, (6η is the cathode metal fitting. The main body case (1) is the upper end of the housing 01) The auxiliary housing is constructed by attaching the sill a2 to the auxiliary housing (12), and a switch mechanism is built in between the inner surface of the auxiliary housing (12) and the small diameter cylindrical portion 0 at the upper end of the housing 0
, the switch handle αD is exposed on the outer surface of the auxiliary housing 7a. The connection housing (3) is connected to the main body case (1
It is detachable from the main body case (1), and is divided into two parts, the front and the rear. It protrudes downward, and inside there is a shaft support located approximately at the center in the vertical direction. , +(38) is a drive rod a1 swingably supported.
is provided. The head part (2) is connected to the connection housing (
3) The upper end, the comb-shaped fixed blade kl+ and the movable blade (
44 is arranged on the lower surface, and the blade base (4) is pivoted to the upper end of the connection housing (3) in a detachable and openable/closable manner. A spherical portion t281 at the upper end of the drive rod is fitted and connected to the drive rod.(46) is a button for attaching and detaching the blade base (4).

The inside of the first joint is fixed to the output shaft deer of the t-ter which protrudes into the cylindrical part α crease of the housing 0υ through the waterproof plate (40), and the second joint 4) is further fixed upward in the spring 4). is connected to the first joint (support) so as to be able to move up and down and transmit rotation in a state where it is biased by It can be freely fitted and connected to the second joint threshold. This connecting culm has an eccentric shaft (
A connection that rotates with the output of the eccentric shaft (D-ra (2η) which is supported by the hollow and is transferred and secured to the lower end of the drive rod H #I (21) The culm is the driving rod α
The movable blade (6) is reciprocated by swinging the arm around the pivot hinge.

In the power transmission mechanism as described above, the main body case (1)
The clearance between the first joint (231) and the second joint (Foundation), which are the sides, should be 0.1 m or less, and the length of the joint between them should be at least twice the shaft diameter of the first joint (231). Fittings (24
) The second joint 2 (rolling) is movable up and down while preventing the shaft from falling, and is elastically fitted onto the first joint □□□). On the other hand, the connecting rod located on the head part (2) side is provided with a flange part on its upper surface, and the flange part (31) is located in the space provided on the lower inner surface of the connecting housing (3). ,
Attach the head part (2) to the main body case (11) and connect the connecting culm (
When the connecting culm (2 mm) is fitted to the second joint example and the two fitting surfaces (32 joints) are engaged, the connecting culm (2 mm is the first and second joint A (
It is arranged so that it is positioned by the output shaft of the seventh gear via the motor. In other words, the connected culm (sha) is the head part (2)
When removed from the main body case (1), when it is in good condition, it is in a state where it can move almost freely within the range restricted by the space and the inner surface of the flange (31) and the connecting cylinder part (30), and the second joint (goods) and By connecting these, the shaft center is aligned with the output shaft of the heptad.

Figures 7 and 8 show the state in which the head part (2) is replaced with a different head part (2) and attached to the main body case (1), and the movable blade (6) in this head part (2) is The 0, that is, the connecting culm, which is reciprocally driven by the lighter crank mechanism, is formed as a gear, and its flange (31) is provided with teeth, and the gear that meshes with this connecting culm is attached to the head portion (2).
An eccentric shaft placed inside and protruding from A04) is connected to one end of the drive rod A04). Here, the connecting rod is the base plate 0
Although the shaft (36) provided at 0 is inserted, this shaft (3 (support) only prevents the engagement between the A and the connecting rods (to) from disengaging, and the connecting rod □□ It is inserted into the shaft hole marked □ with considerable clearance, and the position of the connecting rod (b) is determined by the second joint example.

Fig. 6 shows the switch mechanism described above, in which the hinge 08 protruding from the switch handle αD engages with the cam #I (5υ) of the cam plate (5υ) arranged so that it can move up and down on the outer surface of the cylindrical part.・By operating the switch handle αη in the direction of the arrow in the figure, the cam plate − moves downward, and the pin hanging integrally with the cam plate (50) presses the switch terminal (6 to 6) and presses the cathode metal fitting +67. ).

As described above, in the present invention, since the member that converts rotation into reciprocating motion is provided on the head portion side that has a blade portion and is detachable from the main body case, the reciprocating force direction of the blade portion is It is possible to easily replace and use different head parts, and the connecting rod, which is the input part of the conversion member in this head part, is made to be able to move freely with respect to the head part. The position of the connecting rod is determined by being connected to the second joint that can swing freely in the axial direction on the main body case side. Therefore, even though there is a conversion member on the bottom side, the drive in power transmission is Loss and drive noise are small.

[Brief explanation of the drawing]

(Figure 1 is a perspective view of an embodiment of the present invention, Figure 2 is a vertical cross-sectional view of the same as the above, Figure 3 is a cross-sectional view of the same as the above, Figure 4 is an exploded perspective view of the main parts of the same, and Figure 5 is a value) (b) is a vertical cross-sectional view and a cross-sectional view of the head section same as above, and Fig. 6 (a) and (b) are A in Fig. 2.
- A cross-sectional view taken along line A and line B-B, Figure 7 is a perspective view of the head with a different head attached, and Figure 8 (a) and (b) are longitudinal and cross-sectional views of the same head. 91Y1 is a sectional view of a conventional example. (1) is the main body case, (2) is the head part, (7) is the 7-
(1) shows the spring, (24 shows the output shaft, (c) shows the first joint, (goods) shows the second joint, and (b) shows the connecting rod. Figure 2 4241 qxlill, j 58-Gl777 ( 4) Figure 3

Claims (1)

[Scope of Claims] (]) An electric shaver in which a head portion with a reciprocating blade portion is detachably attached to a main body case in which a shaver is installed, which converts rotation into reciprocating motion. A member is provided on the head side, and a connecting rod as a rotational power input part of this conversion member is held in a free state in the head part, and a spring is attached to the first joint fixed to the Tanabata output shaft in the main body case. a second bolt which is fired by the user and is fitted and connected to the connecting rod.
An electric stove P characterized in that a joint is attached so as to be swingable in the axial direction. (2) The electric shaver according to claim 1, wherein the connecting rod has a flange at a local part thereof and is loosely fitted into the space within the head portion. The electric shaver according to claim 1, characterized in that it has an eccentric shaft.