JP2563184B2 - Reciprocating electric razor - Google Patents

Description

TECHNICAL FIELD The present invention relates to an outer blade frame incorporating an outer blade, and a reciprocating electric shaver in which the outer blade frame is elastically locked at both end surfaces.

(Background Art) As a mechanism for attaching and detaching an outer blade frame of a conventional reciprocating electric shaver, there is a technique disclosed in JP-A-61-386. However, the conventional reciprocating electric shaver may have the following problems.

(1) When the outer cutter frame is released, the outer cutter frame and the lock release hook are different components, so the outer cutter frame must be received by hand to release the lock. The body may fall and damage the outer blade frame.

(2) Further, since the outer blade frame and the lock release hook are separate components, the number of parts is large and the number of assembling steps is required, resulting in high cost.

(3) Furthermore, when the outer blade is replaced, only the outer blade is removed from the outer blade frame, and if a new outer blade is installed, the outer blade is easily deformed. Although there is no deformation, the outer cutter frame itself needs to be large in strength, and many of them are made by die casting, for example, and therefore replacement of each outer cutter frame results in high cost.

(Object of the Invention) The present invention is intended to solve the above-mentioned problems, and facilitates operability when the outer blade frame is attached to and detached from the outer blade frame in the inner blade pushing-up direction, and at the time of attachment and detachment. It is an object of the present invention to provide a reciprocating electric razor which has a reduced number of partial points and a reduced cost while improving the damage prevention of the outer blade and the cleaning property of beard scraps.

DISCLOSURE OF THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

1 to 5 show a reciprocating electric shaver showing an embodiment of the present invention, and FIG. 1 is a side view showing a body assembly drawing thereof, and FIGS. 2 (a), 2 (b) and 2 (c). Is an exploded perspective view of each portion, FIG. 3 is a perspective view of an outer blade frame locking portion, FIG. 4 is a perspective view of an outer blade frame fitting portion, and FIG. 5 is a relationship between the outer blade frame body and the outer blade frame. It is sectional drawing explaining a combination operation.

In FIG. 1, reference numeral 1 is a main body portion having a built-in drive source, and the lower portion is omitted. Reference numeral 2 is an outer blade frame for fixing the outer blade block, 3 is an outer blade frame for supporting the outer blade 4, and 5 is an inner blade composed of a plurality of blades. The outer blade frame 3 is elastically locked to the outer blade frame 2 by outer blade frame locking portions 6 provided at both ends thereof, and the outer blade frame 3 and the outer blade frame 2 are attached / detached in the inner blade pushing-up direction. It is installed freely.

In FIG. 2, the outer cutter 4 is supported by the outer cutter frame 3, and includes an engaging hook 7 provided at both ends of the outer cutter frame 3 in the inner cutter reciprocating direction and a detachable arm 9 having a release button 8. The outer blade frame engaging portion 6 is engaged with fitting portions 10 provided at both ends of the outer blade frame 2.

The engaging portion between the outer frame 3 and the outer blade frame 2 will be described with reference to FIGS. 3 to 4.

In FIG. 3, the side wall 11 of the outer cutter frame 3 and the detachable arm 9 are shown.
Is integrated by the head 12, and is generally inverted U as a whole.
A character-shaped outer blade locking portion 6 is configured.

In addition, concave lowering prevention grooves 14 are formed in the lower surface of the head 12 at the upper end of the detachable arm 9, that is, in the inner blade pushing-up direction at both ends, and the outer blade frame 2 and the outer blade frame 2 are provided outside the lower tip of the detachable arm 9. A release button 8 for releasing the engagement with the outer blade frame 3 is formed, and a substantially T-shaped locking hook 7 is formed on the inner side.

The locking hook 7 is integrally formed with the detachable arm 9 via a plate-shaped rib 15, and has an apex 16a at a substantially central portion when viewed from the side on the inner side surface in the mounting direction and has a substantially triangular shape. An inclined surface 17a is formed, and an engaging surface 18a is further formed on the upper surface of the engaging hook 7.

Further, when the outer blade frame 2 and the outer blade frame 3 are released from each other, the tips of the projections come into contact with the side walls 11 of the outer blade frame 3 to restrict the displacement of the detachable arm 9 and prevent the breakage. A cube-shaped stopper 19 is formed on the same plane of the outer blade frame 3 having the locking hooks 7 at a substantially central portion.

Next, referring to FIG. 4, the outer cutter frame engaging portion 6 is adapted to engage with the fitting portion 10 of the outer cutter frame 2 to engage the outer fitting frame body 3. A convex fall prevention rib 20 that fits with the fall prevention groove 14 is formed inside, and a locking protrusion 21 that engages with the locking hook 7 is formed below the fall prevention rib 20. The lower surface of 21 is formed with a locking surface 18b that abuts and locks the locking surface 18a of the locking hook 7.

Further, guide surfaces 22 are formed at intervals so that the ribs 15 can pass through without coming into contact with each other, and in a substantially central portion where the tops 16a and the slopes 17a of the locking hooks 7 slide in the inner blade 5 direction of the locking projections 21. A slope portion 17b forming a top portion 16b and having a substantially triangular shape is formed.

Next, in FIG. 5, the outer blade frame 3 and the outer blade frame 2
The operation at the time of attaching and detaching will be described.

First, FIG. 1A shows a state in which the outer cutter frame 3 is set on the outer cutter frame 2, and a gap is formed between the side wall 11 of the outer cutter frame 3 and the detachable arm 9, and the tilt formed on the detachable arm 9 is collapsed. Prevention groove 14
The fall prevention rib 20 is in contact with the fall prevention rib.
20 prevents the outer blade frame 3 from being deformed toward the inner blade 5, and even if the head 12 of the detachable arm 9 is strongly pressed,
Deformation to the side is prevented.

Further, the locking surface 18a of the prevention hook 7 and the locking surface 18b of the locking projection 21 come into contact with each other and are locked and fixed.

Furthermore, in the process of withdrawal in FIGS.
Locking surface of the locking hook 7 by pressing the release button 8 in the A direction
The attaching / detaching arm 9 is deformed until the state where 18a and the engaging surface 18b of the engaging protrusion 21 are in contact with each other to release the engaging state, and then the attaching / detaching arm 9 is pulled out in the B direction by applying a pulling force.

At this time, the slanted surface portion 17a of the locking hook 7 and the slanted surface portion 17b of the locking projection 21 are slidably moved to be released from the engaged state.

Further, at the time of mounting of FIG. (D), the inclined surface 17a of the locking hook 7 and the locking projection 2 are applied by applying a pressing force in the C direction.
Due to the taper effect with the inclined surface portion 17b of 1, the detachable arm 9 is deformed by smooth sliding contact, and the engaging surface 18a of the engaging hook 7 is deformed.
And the locking surface 18b of the locking projection 21 come into contact with each other to be in a locked state and mounted.

Further, by making the dimension Y between the tops 16a of the locking hooks 7 smaller than the inner dimension X of the fall prevention ribs 20, the detachable arm 9 is displaced only when it is attached / detached due to contact with the retaining hook 7. Is.

This prevents the detachable arm 9 from being permanently attached to the outer blade frame 2 and permanently attached to the outer blade frame 2 when the outer blade frame engaging portion 6 is not completely attached and left in a displaced state.

Furthermore, since the detachable arm 9 is displaced only inside when detached, the stress concentration of the tensile stress is smaller in the head 12 of the detachable arm 9 than when displaced outward.

The stopper 19 may be provided on the side wall 11 of the outer cutter frame 3.

(Effects of the Invention) As described above, according to the reciprocating electric shave of the present invention, the outer blade frame body for mounting the outer blade in an arch shape, the outer blade frame body and the outer blade frame in the inner blade pushing-up direction. In a reciprocating electric shaver that is configured to be detachable, fitting portions are provided at both ends in the inner blade reciprocating direction of the outer blade frame, and the outer blade frame is engaged with the fitting portion. Hook part,
Since the attaching / detaching arm having the releasing button for pressing and releasing the engagement between the locking hook portion and the fitting portion is integrally provided, the following effects or advantages are obtained.

(1) Since the outer blade frame can be attached to and detached from the outer blade frame with the same finger, the attachment and detachment is easy.

(2) The number of parts is reduced, and it can be provided at low cost.

(3) The outer blade frame and the detachable arm can be prevented from being damaged even if they are attached and detached with an abnormal force.

(4) Even if the outer blade frame is incompletely mounted and left unattended, stress does not act on the detachable arm, and it is possible to prevent permanent deformation and unattachability.

[Brief description of drawings]

1 to 5 show a reciprocating electric shaver showing an embodiment of the present invention. FIG. 1 is a side view showing an assembly drawing of the main body, FIG. 2 is an exploded perspective view of each part, and FIG. FIG. 4 is a perspective view of the outer blade frame locking portion, FIG. 4 is a perspective view of the outer blade frame fitting portion, and FIG.
The figure is a cross-sectional view for explaining an engaging operation between the outer cutter frame and the outer cutter frame. 1 ... Main body, 2 ... Outer blade frame, 3 ... Outer blade frame,
4 ... Outer blade, 5 ... Inner blade, 6 ... Outer blade frame locking part, 7 ...
Locking hook, 8 ... release button, 9 ... detachable arm, 10
...... Mating part, 11 ...... Side wall, 12 ...... Head part, 13 …… Arm base part, 14 …… Tilt prevention groove, 15 …… Rib, 16a, 16b …… Top part, 17a, 17b …… Slope surface part , 18a, 18b ... Locking surface, 19 ... Stopper, 20 ... Fall prevention rib, 21 ... Locking protrusion, 22 ...
… Guide surface.

Claims (3)

(57) [Claims] 1. An outer blade frame for mounting an outer blade in an arch shape,
In a reciprocating electric shaver in which the outer blade frame and the outer blade frame are configured to be detachable in the inner blade pushing-up direction, fitting portions are provided at both ends of the outer blade frame in the inner blade reciprocating direction, and A detachable arm having a locking hook portion that engages with the fitting portion and a release button that presses and releases the engagement between the locking hook portion and the fitting portion is integrally formed on the blade frame body. A reciprocating electric razor characterized by being provided. 2. A sliding contact surface between a locking hook and a locking projection that is formed in a fitting portion of the outer cutter frame and that engages with the locking hook has a top at a substantially central portion. The reciprocating electric shaver according to claim 1, characterized in that an inclined surface portion whose bottom portion and the bottom portion form a substantially triangular shape is provided. 3. The reciprocating electric shaver according to claim 1, further comprising a stopper for restricting displacement of the detachable arm by a side wall of the outer blade frame.