JPS588861B2 - safety razor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a safety razor having a locking mechanism for locking the swing of a replaceable blade relative to the handle.

Conventionally, safety razors have been proposed in which a replaceable blade cartridge can swing relative to a support portion at the tip of the handle.

Some were also equipped with a locking mechanism that prevented the replacement blade cartridge from swinging depending on the area to be shaved and the quality of the beard.

However, in this type of locking mechanism, the locking member that moves in the front-rear direction and makes it impossible to swing the replaceable blade cartridge is rotatably provided below the direction locking member, and is provided at the rear end of the locking member. The device is moved in the front-back direction by rotating a lever element that is fitted into an engagement hole and has a rotating protrusion.

Therefore, there is a risk that the protrusion that fits into the engagement hole of the locking member and rotates may pry the engagement hole during its rotation.In order to prevent this prying as much as possible, the protrusion should be ) The inner diameter of the engagement hole was made larger so that it could be fitted.

As a result, the play causes a delay in operation and rattling, causing problems in operability, and due to the twisting, the locking position of the locking member relative to the replaceable blade cartridge shifts.
There was a problem with the cartridge not locking completely.

This invention was made by focusing on the problems with conventional safety razors, and its purpose is to provide a simple structure and to reliably lock the swing of the spare blade housing member without delay or rattling. The aim is to provide a safety razor with excellent operability.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS. 1 to 5. Reference numeral 1 denotes a support portion at the tip of the handle of a safety razor, which is made up of an upper support portion 2 and a lower support portion 3. A long elongated hole 2a is formed in the upper surface of the upper support body 2 in a direction perpendicular to the direction from the base end to the distal end of the upper support body 2, and a A guide hole 2b opening in the direction is provided so as to pass through the inside and outside of the support body 2.

Reference numeral 4 denotes a planar ladder-shaped sliding chamber formed on the upper part of the inner surface of the upper support body 2, and arc-shaped fitting recesses 4a, 4a are provided at the center and one side of the inner surface on the base end side, respectively. 4b is recessed.

Reference numeral 5 denotes a through hole opened at the joint portion of the tips of both supporting body members 2 and 3, and an oblique cutout surface is formed on the top surface of the tip.

Reference numeral 6 denotes a stopper member disposed within the support body 2 so as to be movable forward and backward through the guide hole 2b of the support body 2, and a cylindrical engagement protrusion 6a is protruded from the upper surface of the stopper member.

Reference numeral 7 denotes a flat operating member disposed in the sliding chamber 4 so as to be located on the upper surface of the stopper member 6, and has a semicircular fitting protrusion 8a at its base end. At the same time, a stopper arm 8 is extended that has elasticity so as to open in the proximal direction.

Reference numeral 9 denotes an operation protrusion that passes through the elongated hole 2a of the support body 2 and is provided on the upper surface of the operation member 7 so as to protrude upward from the upper surface of the support body 2; 10 is an engagement projection of the stopper member 6; A diagonal guide groove is formed in the lower surface of the operating member 7 so that the protrusion 6a can be slidably engaged with the guide groove, and the tip end thereof is bent parallel to the elongated hole 2a. A stopper portion 10a is formed.

Reference numeral 11 denotes a pair of support arms which are openably and closably attached to the ends of both sides between the support parts 2 and 3, and whose ends are bent inwardly into a hook shape, and are normally urged to close each other. It is formed so that it can be opened by pressing a push button 12 protruding from the base end of the support part 1.

Reference numeral 13 denotes a pressing plate which is attached so as to be able to advance and retreat from the through hole 5 to the outside of the support part 1, and which is always urged to protrude toward the tip side. It is bent obliquely upward in accordance with the inclination of the notch surface of the hole 5.

Reference numeral 14 denotes a replaceable blade cartridge that is swingably supported by the pair of support arms 11, and has a pair of blades 15 disposed on the outside thereof, and a tip of the press plate 13 on the inside thereof. A bent contact surface 14a is formed for resiliently contacting the contact surface 14a, and a pair of stopper portions 14b and 14c are provided at upper and lower positions on the inner side of the contact surface 14a, and a pair of stopper portions 14b and 14c protrude inward from the support portion 1 side. A locking hole 14d is provided in which the tip of the support arm 11 is locked.

16 is a spacer interposed between the pair of blades 15; 17;
is a cleaning plate for cleaning dirt stuck between the pair of blades 15, and is configured to be slidable between the blades 15.

Now, to explain the operation of the embodiment configured as described above, first, as shown in FIG. As shown in FIG. 3, the blade can be swung from the maximum upright position where the blade is normally used, to the maximum tilted position where the upper stopper part 14b is locked to the upper surface of the upper support body 2, and in the maximum upright position. is the pressure plate 1
The tip of the press plate 13 comes into contact with approximately the lowest position of the upper half of the bent contact surface 14a, and at the maximum inclination position, the tip of the press plate 13 comes into contact with the vicinity of the upper end of the contact surface 14a, and the press plate 13 is most retracted into the support part 1.

Since the abutment position of the press plate 13 on the abutting surface 14a is located above the line connecting the support arm 11 and the locking hole 14d, the press plate 13 holds the cartridge 14 as shown in FIG.
In FIG. 3, the force is applied in the clockwise direction.

Therefore, the cartridge 14 is always held in the maximum upright position.

Note that, as described above, as the cartridge 14 is tilted, the pressing plate 13 is moved back, so that the cartridge 1
The biasing force of the press plate 13 against the pressure plate 4 increases.

Now, in order to lock the cartridge 14, which can swing freely in this way, so as not to swing, the operating member 7 in the position shown in FIG. 4 is moved against the fitting force of the stopper arm 8 as shown in FIG. It is slid in the sliding chamber 4 to the position.

In addition, the sliding operation is performed by hooking a finger on the operation protrusion 9 of the operation member 7 that protrudes on the upper support body 2, and inserting the long hole 2 of the support body 2
This is done by sliding inside a.

Then, against the elastic force of the stopper arm 8 of the operating member 7,
The fitting protrusion 8a of the stopper arm 8 separates from the fitting recess 4b on one side of the sliding chamber 4, and stops in the fitted state in the central fitting recess 4a, and the engaging protrusion 6a of the stopper member 6 disengages. slides the guide groove 10 of the operating member 7 from the proximal side to the distal side,
It stops at the stopper portion 10a of the guide groove 10.

As a result, the stopper member 6 protrudes from the solid line position in FIG. 2 to the chain line position (or from the position shown in FIG. 4 to FIG. 5),
As shown in FIG. 2, the upward movement of the cartridge rich is prevented by the stopper member 6 coming into contact with the upper end of the contact surface 14a.
Further, as described above, the downward movement of the cartridge 14 is regulated by the stopper portion 14c of the cartridge 14 being engaged with the lower surface of the lower support body 3, and the swinging of the cartridge 14 is locked.

Note that when the engagement protrusion 6a slides in the guide groove 10 from the proximal end side to the distal end side, there is no play in the engaged state of the engagement protrusion 6a and the guide groove 10, so that the engagement protrusion 6a due to play, that is, There is no delay in the operation of the stopper member 6.

Further, the engaging protrusion 6a only moves forward along the guide groove 10 in response to a force from the left in FIG. 4, and no force is applied in the vertical direction.

As a result, there is no fear that the tip of the stopper member 6 will tilt in the vertical direction, and the cartridge 14 is always locked at a predetermined position, so that an incomplete lock state due to displacement of the locking position does not occur.

Next, to release the oscillation locked in this way,
By sliding the operation projection 9, which has been moved to the position shown by the chain line in FIG. 5, to the position shown by the chain line in FIG. 4, contrary to the locking operation, the operation member 7 is slid and the stopper member 6 is moved back.

Note that the present invention is not limited to the above-mentioned embodiments, and when the stopper arm 8 of the operating member 7 is shaped as shown in FIGS. 6 to 8, or when using another type of locking mechanism, Any changes can be made without departing from the spirit of the invention.

As described in detail above, the present invention has a simple structure, can reliably lock the swing of the replaceable blade housing member without delay or rattling, and has excellent operability, which is preferable for industrial use. It is an invention.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway perspective view showing a state in which a replaceable blade cartridge is supported by a support arm according to an embodiment of the safety razor of the present invention, and FIGS. 2 and 3 are partially cutaway views showing essential parts as well. FIG. 2 is a side view showing the replaceable blade cartridge in a normal state, and FIG. 3 is a side view showing the cartridge in a maximum tilted state. 4 and 5 are partially cutaway plan views showing the main parts, and FIG. 4 shows the stopper member in a retracted state, and FIG.
The figure shows the stopper member in a protruding state. 6 to 8 are plan views showing other embodiments of the operating member. Handle support portion 1, stopper member 6, operating member 7, operating projection 9, guide groove 10, support arm 11, push button 12, press plate 13, replaceable blade cartridge 14, blade 15.

Claims (1)

[Scope of Claims] 1. A safety razor in which a replaceable blade accommodating member 14 is swingably supported with respect to a support portion 1 of the handle, and a blade accommodating member 14 is disposed within the support member 1 so as to be movable in the front and rear direction, and protrudes forward. When this happens, the replaceable blade housing member 14 is locked, and the housing member 14 is fixed to the handle at the maximum upright position, and when the blade is moved backward, the housing member 14 is locked.
a stop member 6 that releases the locking of the housing member 14 and allows the housing member 14 to swing; an engagement protrusion 6a protruding from the upper surface of the stopper member 6; The engaging protrusion 6a is arranged to be movable in the left-right direction perpendicular to the movement direction, and the engaging protrusion 6a is slidable in a guide groove 10 formed obliquely on the lower surface thereof to guide the engaging protrusion 6a in the front-rear direction. engage,
an operating member 7 for moving the stopper member 6 in the front-rear direction; A safety razor comprising: an operating protrusion 9 for moving the razor 7 in the left-right direction;