JPH0422388A - Safety shaver - Google Patents

Abstract

PURPOSE:To enable shaving without uneveness even when right and left parts of a blade abuts on an uneven surface of face of a user during shaving operation by giving resilient force to a joint so as to be returned to the center of pivotal movement at all times by means of a resilient member interposed between a gripping body and the joint, and providing a means for enabling the connecting of a replaceable blade unit for use at an upper part of the joint. CONSTITUTION:Inside a recess 10 of a joint 8 an upper part having a notch for gripping member 1 is inserted and fixed to move pivotably around a pivotal shaft. Thereby the joint 8 can move pivotally, but a horizontal restriction face 16 at the front part of joint 8 abuts against a restriction face of 6 of the gripping member, whereby the joint 8 can move pivotally at a specified range of angles. By the action of a cam face 3 at the rear face of the gripping member and a cam follower member 15 of the joint 8, the joint 8 is returned to the center of the original pivotal center normally. Since a replaceable blade unit 20 fitted to the joint 8 swings up and down at its opposed ends by the action of the joint 8, the blade can swings meeting with uneven surface of face of a user to enable shaving without uneveness even at the time when the right and left of the blade abuts on the uneveness of face during shaving operation.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a safety razor used primarily by men to shave their beards.

(Prior Art) The first safety razor invented had a blade completely fixed to the handle, so if you shave while applying it to a slightly uneven face, it will result in uneven shaving. It had become. In order to solve this drawback, safety razors have recently been proposed in which the blade body is supported flexibly so that the blade body can move vertically or diagonally back and forth during use.

(Problems to be Solved by the Present Invention) Conventional products are effective for shaving because the blade body is supported flexibly and can move relatively freely. However, although it is possible to flexibly support the blade in a small and thin replaceable blade unit, the structure would be extremely precise, making it more likely to malfunction, and of course increasing costs. It also has shortcomings.

An object of the present invention is to provide a safety razor that can shave evenly even when there are unevenness on the face on the left and right sides of the blade during shaving.

(Means for Solving the Problems) The present invention consists of a handle, a joint, and a replacement blade unit, and the joint is located at the top of the handle and is pivotable about a pivot axis that extends perpendicularly to the handle in the front-rear direction of the handle. A means is provided between the handle and the joint for restricting the joint from pivoting beyond a certain range of angles;
An elastic member interposed between the handle and the joint provides the joint with an elastic force that constantly returns it to the pivot center, and the upper end of the joint is provided with a means for connecting the replaceable blade unit in the use state. It is characterized by this.

Next, examples of the present invention will be described.

The handle 1 is elongated and has a rectangular cross section at its upper part. A cutout 2 extending to the upper end of the handle is provided on the upper back surface of the handle 1, and the lower surface of the cutout 2 is formed into a cam surface 3 recessed in a dogleg shape. A pivot shaft 4 is provided near the upper end of the notch 2 .

Similarly, the upper front surface of the handle 1 is provided with a notch 5 extending to the upper end of the handle, and the lower surface of the notch 5 is formed with a regulating surface 6 projecting in a figure-eight shape. A pivot shaft 7 is provided near the upper end of the notch 5 .

The base 9 of the joint 8 has a nearly triangular shape, and a recess 10 is bored from its lower surface. This recess 1
A rear surface portion 12 and a front surface portion 13 are formed on the base portion 9 with the boundary at 0 as the boundary. The rear portion 12 is provided with a hole that is pivotally connected to the pivot shaft 4, and the front portion 13 is provided with a hole that is pivotally connected to the pivot shaft 7. Furthermore, a slit 14 is provided in the rear surface portion 12 along the oblique side of the triangle, and a cam follower 15 is formed at the lower end of the rear surface portion. FIG. 5 shows another embodiment of this cam follower, in which a cut 26 is made in the center of the cam follower 15 to separate the cam follower into two pieces.

The lower end of the front portion 13 is formed into a horizontal regulating surface 16 .

A pair of arms 17.17 extend upwardly from opposite ends of the base 9, with inwardly directed journal shafts 18.17 at the ends of the arms.
18 are provided. In addition, at the center of the upper end of the base 9,
An upper end cam surface 19 recessed in a dogleg shape is formed.

The replaceable blade unit 20 has a blade 23 sandwiched between a blade stand 2I and a top plate 22, and is provided with a pair of journal bearings (not shown) in the longitudinal direction, and a journal shaft 18 of the arm.
．． 18, and is attached to the arm so as to be swingable about the journal axis. Spare blade unit 20
In addition, there is a cam follower 25 supported by an elastic piece 24 below the blade stand 21, and this cam follower 25 is cam-coupled with the upper end cam surface 19, so that the replaceable blade unit 20 is always operated. It acts to return to the center of oscillation.

(Operations and Effects) The present invention has the above-described configuration, and the upper part of the handle 1 provided with the notch is inserted into the recess 1o of the joint and is pivotably attached to the pivot shaft. This allows the joint 8 to pivot, but since the horizontal regulating surface 16 provided on the front surface of the joint abuts against the regulating surface 6 of the handle, the joint 8 can pivot within a certain range of angles. In addition, the cam surface 3 provided on the rear surface of the handle and the cam follower 15 of the joint
Due to this action, the pivoted joint always returns to its original pivot center.

Due to the action of the joint described above, both ends of the replaceable blade unit 20 attached to the joint swing up and down, so even when the unevenness of the face is on either side of the blade while shaving, the blade will follow the unevenness of the face. It oscillates, allowing you to shave evenly.

[Brief explanation of the drawing]

Fig. 1 is a rear view of the present invention, Fig. 2 is a rear view showing the state of cam connection between the joint and the handle, Fig. 3 is a front view showing the state in which the joint pivots are restricted, and Fig. 4 is the main body. A sectional view of the invention, FIG. 5 is a rear view showing another embodiment of the invention shown in FIG. 11. Pattern 39. Cam surface 80. Joint 141. Slit 156. cam follower

Claims (1)

[Claims] It consists of a handle, a joint, and a replaceable blade unit.The joint is attached to the top of the handle so that it can pivot about a pivot axis that extends perpendicularly to the handle in the front-back direction of the handle. Means for regulating pivoting is provided between the handle and the joint, and furthermore, an elastic member interposed between the handle and the joint allows the joint to always exert an elastic force to return to the pivot center. A safety razor, characterized in that the upper end of the joint is provided with means for connecting the replaceable blade unit in use.