JPH0646460Y2 - Electric razor - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to an electric shaver characterized by locking means for an outer blade holder and an outer blade protection cap.

[Conventional technology]

In an electric razor, an outer blade protection cap is detachably fitted on the main body case to cover the outer blade holder in order to protect the outer blade when not in use, but the outer blade protection cap is entirely made of plastic. Many of them are molded products and are elastically engaged with the main body case by utilizing the elastic deformation of the cap itself.

However, in recent years, along with the trend of high-grade users, there are some products in which the surface of the body case is partially decorated with metal or the like, or the whole case is covered with a metal case to give the product a high-class appearance. Correspondingly, the outer blade protection cap has been upgraded and a hard one such as a die-cast one or a deep-drawn metal material such as brass or aluminum has been used.

However, since such a hard outer blade protection cap cannot use its own elastic deformation, a structure in which a lock piece that can be retracted elastically is attached to the main body case and the lock piece is detachably attached is adopted. It is designed to be used.

In this case, the outer blade holder is also generally a hard one such as die-cast, and since locking by the lock piece is required, the outer blade holder and the outer blade protection cap are locked and supported by the common lock piece. Reasonable locking means are conceivable, and for example, the one shown in Japanese Utility Model Publication No. 50-116679 is proposed.

[Problems to be solved by the device]

However, in the above-mentioned conventional example, the lock piece mounted on the main body case is urged outward by the spring, and the lock piece engages the holder engagement claw and the outer blade protection cap that engage with the inner surface of the outer blade holder. By integrally forming cap engaging claws that engage with the inner surface of
This one lock piece simultaneously holds and supports the outer blade holder and the outer blade protection cap, but there is a possibility that the following problems may occur.

That is, in such a lock piece, the holder engaging claw and the cap engaging claw are arranged side by side at substantially the same distance with respect to the engagement biasing spring. If the lock piece retreats against the spring when removing the, the holder engagement claws for the outer blade holder will also be displaced backwards by approximately the same amount, and the engagement depth dimensions of both engagement claws must be strictly controlled. Otherwise, it was easy to accidentally detach the outer blade holder when removing the outer blade protection cap.

Further, even if such a lock piece is manufactured under strict dimensional control, there is a possibility that the above problem may occur due to wear of the engaging claws during repeated use, and there is room for improvement here.

Therefore, the present invention solves the above-mentioned problems by improving the arrangement of the holder engaging claws and the cap engaging formed on the common lock piece and the mounting position of the spring.

[Means for Solving the Problems]

In the electric shaver of the present invention, for example, as shown in FIG. 1, a lock piece 17 biased in an outward projecting direction by a spring 19 is attached to the upper part of the main body case 1.
The outer blade holder 16 as the outer blade holder 16 is attached and detached.
A holder engaging claw 17a that engages and disengages with a projection 16a provided at the lower end of the inner surface of 16 and the outer blade protection cap that projects outward from the lower end of the outer blade holder 16 and is attached and detached by the outer blade protection cap 20.
A cap engaging claw 17b that engages and disengages with a recess 20a provided on the lower portion of the inner surface of 20 is integrally formed by vertically shifting the position, and the spring 19 is incorporated immediately behind the holder engaging claw 17a at the rear part thereof. It is a thing.

[Action]

In that case, when a force in the removing direction is applied to the outer blade protection cap 20, an inward force acts on the cap engaging claw 17b of the lock piece 17 to cause the lock piece 17 to move backward against the spring 19, but Since the spring 19 is in the back portion immediately behind the holder engaging claw 17a and applies a biasing force toward the engaging portion of the holder engaging claw 17a with the protrusion 16a, the lock piece 17 is located near its upper end. The holder engaging claw 17 on the side close to the swing fulcrum is displaced backwards against the spring 19 so as to swing about the fulcrum.
a does not respond to displacement so much and maintains the engagement state with the protrusion 16a.

[Effect of device]

According to the electric shaver of the present invention, the lock piece 17 is urged in the outward protruding direction by the spring 19 on the main body case 1,
Since the holder engaging claw 17a and the cap engaging claw 17b are integrally formed by vertically shifting their positions, and the spring 19 is incorporated immediately rearward of the holder engaging claw 17a, Even if the lock piece 17 is suddenly retracted and displaced due to the outer blade protection cap 20 being removed vigorously, and even if the lock piece 17 is retracted a little excessively, the engagement state of the holder engagement claw 17a may be accidentally released. It was possible to prevent it and to improve the handleability.

〔Example〕

FIG. 1 shows a longitudinal front view of an electric shaver according to the present invention, and FIG. 2 shows its overall appearance.

This electric razor has a structure in which a razor head 2 having reciprocating inner and outer blades 14 and 15 is provided on an upper portion of a main body case 1.

The main body case 1 is externally fitted to a middle case 1a having a front and rear half-split structure, a pair of front and rear decorative cases 1b and 1b covering outer surfaces thereof, a pair of left and right side pieces 1d and 1e, and a lower portion of the middle case 1a. It consists of a cup-shaped bottom case 1f. Middle case
A motor mount 4, which supports the motor 3 with screws, a circuit board 5, a rechargeable battery 6, a charging plug case 7, a vertical slide type switch plate 8, a switch button 9 and the like are incorporated in the interior of 1a.

A vibrator 10 is attached to the upper part of the motor mount 4, and the vibrator 10 and the eccentric cam 11 on the motor output shaft 3a are linked.
The vibrator 10 is connected by 12 and reciprocally drives with a constant stroke in the left-right direction as the motor rotates. Then, the inner blade 14 is attached to the support shaft 10a erected from the vibrator 10 via the inner blade holder 13.

On the upper part of the middle case 1a, an outer blade holder 16 that holds the outer blade 15 in an arch-shaped cross section, and the outer blade 15 and the outer blade holder 16 are provided.
A pair of left and right lock pieces that are detachably fitted to the outer blade protection cap 20 to be covered with the outer blade holder 16 and the outer blade protection cap 20 are engaged with each other at their lower ends.
It is locked to the middle case 1a via 17 via a stopper.

The lock pieces 17 are engaged and supported in recesses 18 formed on the left and right of the upper portion of the middle case 1a so as to be retained, and are constantly urged outward by a spring 19. On the upper outer surface of this lock piece 17, the outer blade holder
A holder engaging claw 17a having a substantially V-shaped cross section that engages with a protrusion 16a having a substantially V-shaped cross section provided on the inner surface of the lower end of 16 is formed, and the spring is provided on the back portion immediately rearward of the holder engaging claw 17a. 19 are attached. Further, a cap engaging claw 17b slightly protruding outward from the lower end of the outer blade holder 16 is provided on the lower outer surface of the lock piece 17, and the cap engaging claw 1
7b has a rounded tip, and is engaged in a recess 20a provided relatively shallowly on the inner surface of the lower end of the outer blade protection cap 20,
The outer blade protection cap 20 is prevented from coming off.

The lock piece 17 for the recess 18 of the main body case 1 described above.
As the engagement support means of the lock piece 17, a retaining collar 17c protruding upward on the upper end of the lock piece 17 is located inside the downward collar 18a provided on the upper edge of the opening of the recess 18, and on the lower end of the cap engaging claw 17b. The formed outward upward sloping surface 17d is formed at the lower edge of the opening of the concave portion 18 at substantially the same slope as that of the outward upward sloping surface 18d.
While slidably abutting on b, the recess between the holder engaging claw 17a and the cap engaging claw 17b on the outer surface of the lock piece 17 is laterally centered between the upper and lower edges of the opening of the recess 18 of the main body case 1. By engaging the wall portion 18c of the passed shape,
The lock piece (17) is inserted and supported in the recess (18) in a retaining manner.

Now, when the outer blade protection cap 20 is pulled upward from the outer blade holder 16, the lock piece 17 serves as a fulcrum at a locking portion of the retaining collar 17c located inside the downward flange 18a at the upper end of the recess 18. Then, the cap engaging claws 17b are reciprocally displaced against the spring 19 so as to swing.
Comes out of the recess 20a. Further, when the outer blade holder 16 is strongly pulled upward, at this time, the lock piece 17 receives the pressing force of the protrusion 16a on the holder engaging claw 17a, and the lock piece 17 as a whole resists the spring 19 linearly. The holder engaging claw 17a is disengaged from the protrusion 16a by the backward displacement.

When the outer blade holder 16 is fitted onto the upper part of the main body case 1, the lock piece 17 pushes the holder engaging claw 17a with the protrusion 16a of the outer blade holder 16 while resisting the spring 19 into the recess 18. After the backward movement, the spring 19 automatically causes the spring 19 to outwardly project and return to engage the holder engaging claw 17a with the upper side of the protrusion 16a. Also, when the outer blade protection cap 20 is fitted onto the outer blade holder 16, the lock piece 17 will be
The tip of the cap engagement claw 17b protruding from the lower end of 16 is once pushed against the lower edge of the outer blade protection cap 20 against the spring 19, and then the spring 19 automatically protrudes and returns outward to move the cap. The engaging claw 17b is engaged in the recess 20a.

[Brief description of drawings]

The drawings show one embodiment of the electric shaver according to the present invention. FIG. 1 is a vertical sectional front view, and FIG. 2 is an overall external perspective view. 1 ... Main body case, 16 ... Outer blade holder, 16a ... Projection, 17 ... Lock piece, 17a ... Holder engaging claw, 17b ... Cap engaging claw, 19 ... Spring, 20a ... Recess .

Claims (1)

[Scope of utility model registration request] 1. A main body case 1, an outer blade holder 16 detachably fitted on the upper part of the main body case 1, and an outer blade detachably fitted on the main body case 1 so as to cover the outer blade holder 16. Blade protection cap 20 and spring 19 on top of body case 1
And a lock piece 17 mounted so as to be urged in an outward protruding direction with the lock piece 17, the lock piece 17 is provided at the lower end of the inner surface of the outer blade holder 16 when the outer blade holder 16 is attached and detached. Protruding part
A holder engaging claw 17a that is engaged with and disengaged from the outer cutter holder 16a, and a concave portion 20a provided on the lower portion of the inner surface of the outer blade protection cap 20 by protruding outward from the lower end of the outer blade holder 16 and attaching and detaching the outer blade protection cap 20. An electric razor characterized in that a cap engaging claw 17b which is engaged with and disengaged from is integrally formed by vertically shifting the position, and the spring 19 is incorporated in a rear back portion immediately behind the holder engaging claw 17a.