JPS6026782Y2 - Electric razor blade protection cap mounting structure - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in the mounting structure of the blade protection cap of an electric razor.

Conventionally, the blade protection cap for electric razors has been attached by fitting the blade protection cap by engaging the inner circumference of the blade protection cap dimensionally with the blade frame, housing, etc., or by attaching the blade protection cap to the side of the blade protection cap. A projection is formed on the tip of the inner periphery by notching, and the notch is elastically biased to attach the projection to the blade frame,
In the former case, unless the dimensions are extremely strict, the engagement force becomes strong, and conversely, it easily falls off. Many problems arose due to the material (particularly synthetic resin), and the latter had a notch on the side of the blade protection cap, which was unfavorable in terms of appearance, and when the notch was used as an elastic piece. While a material with high strength and elasticity is required, it must also meet the performance requirements of an appearance component, and it is difficult to achieve both. difficult,
On the other hand, if a material with high strength and elasticity (for example, polyacetal resin) is selected, there will be some problems with the appearance, such as color tone and molding distortion.

In order to further improve these, there was a method in which a recess was formed on the inner surface of the blade protection cap, and a retaining protrusion elastically biased from the housing was engaged with this recess, but normally the elastic bias method is used. In order to obtain a stable engagement force, this engagement protrusion requires at least two parts, so a minimum of four parts are required, and since a coil spring is used, it is difficult to incorporate It is also complicated, and the housing has to be divided to make it possible to incorporate it, which is disadvantageous in terms of cost.

Therefore, the present invention attempts to provide a means to solve these problems in terms of functionality, cost, and workability.

The present invention will be described below based on an embodiment shown in the drawings. FIG. 1 is a longitudinal sectional view of the upper part of the main body with the blade protection cap attached, and FIG. 2 is a view A of FIG. 3.

3 is a cross-sectional view of the upper part of FIG. 1, FIG. 4 is a perspective view of the main part, and FIG. 5 is a perspective view of the main part of another embodiment. be.

1 is a blade protection cap, 2 is an upper case forming a housing, a motor 3 is attached to the upper case 2, and a beard waste receptacle formed on the upper case 2 is fixed to the lower surface of the dish part 4 with a screw, and the motor 3 has three axes. An inner cutter 6 is held in the joint 5 fixed to the joint 5, and a shavings receptacle provided below the blade portion consisting of the inner cutter 6 and the outer cutter 7 is attached to the plate portion 4 with a fitting 10.
A storage space 21 is formed, and a pair of fixtures 10 elastically biased by a spring 11 are provided in the storage space 21.

Furthermore, the fixture 10 is engaged with a groove 9 on the lower inner circumference of the blade frame 8 that fixes the outer cutter 7, and the fixture 10 and the spring 1
The bottom surface of the storage space 21 of No. 1 is the lid part 1 of the mounting base 12.
It is covered by 9.

Further, the flat part 20 of the mounting base 12 is sandwiched between the upper surface of the motor 3 and the lower surface of the tray part 4, and is fixed with the screw, and the top of the mounting base 12 is A pair of elastic legs 14 having locking protrusions 13 protruding from an opening 22 provided in the wall of the case 2 are integrally formed.

Furthermore, the locking protrusion 13 is elastically engaged with a locking recess 15 formed in the blade protection cap, so that the blade protection cap 1 is held so as not to fall off.

Furthermore, a large diameter portion 16 and a small diameter portion 17 are formed on the inner surface of the blade protection cap 1, and when the blade protection cap 1 is attached, a guide protrusion 18 formed on the upper case 2 is formed on the large diameter portion. 16.

Further, as shown in FIGS. 3 and 4, the elastic legs 14 and the cover 19 of the mounting base 12 are formed at right angles in a plane, and the elastic legs 14 and the blade protection cap 1 Large diameter part 1
6 is also arranged in the right angle direction, and the blade protection cap 1 is positioned in the rotational direction by engagement of the large diameter portion 16 and the guide protrusion 18.

In this structure, the blade protection cap 1 can be attached easily because the locking protrusion 13 elastically biased by the elastic legs 14 is pressed into engagement with the locking recess 15 formed in the blade protection cap 1. Since the mounting base 12 is made of synthetic resin, the blade protection cap 1 is less likely to be damaged, and the elastic force of the elastic legs 14 is designed to have a considerable degree of freedom in terms of length, thickness, etc. Therefore, appropriate mounting force can be obtained.

In addition, since the mounting base 12 can be used as a single component for mounting the blade protection cap 1, it is cost-effective, and as in this embodiment, the outer blade can be attached and detached with a single touch, and the attachment 10 can be guided and operated. It can also serve as a lid member, and the elastic legs 14 can be assembled from the opening of the upper case 2.
If you slightly deform and assemble it, the locking protrusion 13 will be attached to the upper case 2.
Because it protrudes from the housing provided on the wall, it can be temporarily assembled in this state, and like when using a coil spring,
The spring does not fly off and assembly is extremely simple.

After that, install the motor 3 into the upper case 2, and
The mounting base 12 (in this embodiment, the flat surface 20, see FIG. 2) is held between the upper surface of the mounting base 12 and the beard debris receptacle by the dish portion 4, and the positions thereof are determined accurately.

In addition, as in this embodiment, the space occupied by the mounting base 12 is limited to the space between the motor 3 and the dust tray, and the space between the motor 3 and the wall of the upper case 2. There is almost no need to do so.

Also, in terms of appearance, the blade protection cap 1 has no cutouts and has a good-looking shape, and the blade protection cap 1 has an extremely pleasant feeling of wearing as the locking protrusion 13 gives a click feeling. It has advantages such as good operability.

In this embodiment, a large-diameter portion 16 is provided on the inner surface of the blade protection cap 1, and the position in the rotational direction is determined by the guide protrusion 18 of the upper case 2, but this is not provided for functional reasons. However, the purpose of the present invention is achieved, and it is also a derivative effect of the present invention that the mounting base 12 can also serve as a lid to prevent the fixture 10 from falling off and a sliding guide thereof.

Further, as shown in FIG. 5, due to the structure, the mounting base 12, the elastic legs 14, and the locking projection 13 are not integrated,
Of course, it is also conceivable that the blade be attached separately, the elastic legs 14 be selected for their elasticity and strength, and the locking protrusion 13 be chosen to be less abrasive to the blade protection cap 1 and preferable in terms of appearance.

In addition, although the locking protrusions 13 were provided at two locations in the above embodiment,
It is not limited to that.

Further, in the embodiment, the mounting base 12 is integrally formed with the elastic legs 14 on both sides of the plane part 20, but for example, it can be divided into two parts in the direction B-B in FIG. The beard debris receptacle may be held between the plate portion and the upper surface of the motor 3.

As described above, according to the present invention, the elastic legs 14 and the locking protrusions 13 can be formed as one part of the mounting base 12 integrally formed as a member for attaching the blade protection cap, which is advantageous in terms of cost.

Furthermore, the mounting base 12 can be assembled by inserting it from the bottom of the upper case 2, deforming the elastic legs 14 to some extent, and making the locking protrusion 13 protrude from the opening 22 provided in the wall of the upper case 2. Temporary assembly can be performed in this state, and the assembly is extremely simple since the spring does not fly off unlike when using a coil spring.

After doing this, insert the motor 3 from below into the bottom surface of the mounting base 12, and screw the screw into the motor 3 from the top surface of the upper case 2, so that the mounting base 12 is connected to the top surface of the motor 3 and the beard debris receiver is in the dish part. 4, it is easy to assemble, and the height position of the locking protrusion 13 is determined, so that the blade protection cap can be properly fixed.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of the upper part of the main body showing an embodiment of the present invention, Fig. 2 is a longitudinal cross-sectional view taken in the direction A-A of Fig. 3, and Fig. 3 is a cross-sectional view of the main part of the upper part of Fig. 1. It is a front view. FIG. 4 is a perspective view showing the relationship between the main parts shown in FIGS. 1 to 3. FIG. 5 is a sectional view of the main parts of another embodiment of the present invention. 1... Blade protection cap, 2... Upper case (housing), 3... Motor 4...
...The beard debris receptacle is a plate part, 12...Mounting base, 1
3... Locking protrusion, 14... Elastic leg part,
15... Locking recess, 19... Closing part,
20... Flat portion, 22... Opening.

Claims (1)

[Scope of utility model registration request] Below the blade part of the housing having a blade part on the upper part, a beard scraps tray forms a dish part, and the whisker scraps tray fixes and supports the motor on the lower surface of the dish part, and covers the blade part and the housing. A plurality of locking recesses are formed on the inner surface of the blade protection cap to be attached to the blade, and a plurality of locking protrusions that lock with the locking recesses are made to protrude from the opening of the nozzing,
The beard debris receptacle is arranged such that the upper part of the mounting base integrally includes the locking protrusion and the legs that apply an elastic force to the locking protrusion, between the lower surface of the dish part and the upper surface of the motor. Electric razor blade protection cap mounting structure.