JPH0813315B2 - Reciprocating electric razor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a reciprocating electric shaver.

(Prior Art) Recently, in a reciprocating electric shaver, a shape in which a thin plate-shaped inner blade is attached to an inner blade base is adopted as the inner blade that is reciprocated by being pressed against the blade of the outer blade. There is something I did.

Conventionally, in the reciprocating electric razor using this thin plate-shaped inner blade, the configuration described below is adopted to attach the inner blade to the inner blade base. One of them is that the inner blade is curved in a circular arc shape (kamaboko shape) and attached to the inner blade base, and a plurality of inner blade support parts are formed on the inner blade base at intervals along the base length direction. The inner blade, which is curved in an arc shape, is brought into close contact with and supported by the inner blade supporting portion from the outside. Another configuration is a configuration in which a thin plate-shaped inner blade is curved and attached to the inner blade base without forming the inner blade support portion on the inner blade base.

(Problems to be Solved by the Invention) In the configuration in which such a thin plate-shaped inner blade is attached to the inner blade base, there are the following problems.

In the latter configuration, since there is nothing to support the inner blade, when a large external force is applied to the outer blade, the inner blade may not be able to support the external force by itself and may be largely deformed and damaged.

Further, in the latter configuration, since the inner blade is closely supported by the plurality of supporting portions formed at intervals in the length direction of the inner blade base,
The inner blade has a portion supported by the support portion and a portion not supported by the support portion. However, if the inner blade is thus divided into both the portion that is closely supported by the support portion and the portion that is not supported by the support portion, when shaving, the hard portion and the soft portion of the inner blade against the human skin are soft. There was a case where the inner blade had a bad feel when hit.

The present invention has been made based on the above circumstances, and an object of the present invention is to provide a reciprocating electric shaver that prevents damage to a thin plate-shaped inner blade due to an external force and has a good feel when shaving. Is.

(Means for Solving the Problem) In order to achieve the above object, the reciprocating electric shaver of the present invention has an outer blade body having a thin plate-shaped outer blade, a thin plate-shaped inner blade, and an inner blade having an arc shape. And an inner blade body having an inner blade base provided with an inner blade deformation regulating member that receives the inner blade from the inside when the inner blade is deformed by being applied with an external force. A gap is formed between the inner blade and the inner blade deformation restricting member of the inner blade base.

Further, the reciprocating electric shaver of the present invention is such that the gap between the side portion of the inner blade curved in an arc shape and the inner blade deformation regulating member facing the side portion of the inner blade is the top of the inner blade. Is set to be smaller than the gap between the top of the inner blade and the inner blade deformation restricting member that faces the inner blade.

(Working) When the inner blade is deformed by the force of applying the outer blade to human skin during normal shaving, the inner blade does not contact the inner blade deformation regulating member. Therefore, when shaving normally, the entire inner blade is in a uniform state where it does not come into contact with the inner blade deformation regulating member, so the contact of the inner blade with the skin is uniform over the entire inner blade. Good shaving feel.

When an excessively large external force is applied to the outer blade, the inner blade deformed by this outer force is received by the inner blade deformation regulation member of the inner blade base to regulate the deformation of the inner blade, preventing the inner blade from deforming. it can.

Since the gap between the side portion of the inner blade curved in an arc shape and the inner blade deformation regulation member is small, the side portion of the inner blade is smaller than the deformation amount of the top of the inner blade when deformed by an external force. Contact the inner blade deformation regulating member with a small amount of deformation. Therefore, it is possible to prevent damage to the side portions of the inner blade near the fixed portion of the inner blade and the inner blade base.

(Example) Hereinafter, one example of the present invention will be described with reference to the drawings.

1 and 2 are sectional views of a reciprocating electric shaver, and FIGS. 3 and 4 show exploded parts of the electric shaver shown in FIGS. 1 and 2.

In the figure, reference numeral 1 is a main body of an electric shaver having a bottomed cylindrical shape formed by combining a pair of synthetic resin cases, and an outer blade case 2 and a thin plate-shaped outer blade 3 are provided at an upper open portion of the main body 1. The blade body 4 is detachably attached. Outer blade case 2
Has an upper end and a lower end opened, and an outer blade 3 is attached to the upper end open portion so as to be curved in an arcuate shape (a semi-cylindrical shape) and detachably attached. The lower open portion of the outer blade case 2 is attachable to and detachable from the main body 1. Is fitted to. The main body 1 and the outer blade case 2 are attached and detached by using an appropriate means (not shown). The outer blade 3 has a large number of thin blades formed in a mesh shape.

A battery, an electric motor, and an eccentric cam mechanism for converting the rotation of the electric motor into an eccentric rotation are provided inside the main body 1. Further, the eccentric rotation of the eccentric cam mechanism is provided in the left and right directions inside the main body 1 in the figure. A drive member 5 is provided which converts the reciprocating motion along the drive member. The drive member 5 has elastic leg portions on both sides, and the elastic leg portions are supported by the main body 1 so as to be reciprocally movable. A drive shaft 6 is formed upright in the upper center of the control member 5, and a compression coil spring 7 is wound around the drive shaft 6. A spring bearing 8 mounted on a compression coil spring 7 is provided on the drive shaft 6 so as to be movable up and down, and a connecting tool 9 is pivotally mounted on the spring bearing 8 so as to swing in a vertical plane.

Further, inside the outer blade body 4, an inner blade base 10 and an inner blade body 12 having a thin plate-shaped inner blade 11 are arranged. Inner Blade 10
Is a body in which a pair of beam members 13 arranged in parallel and a plurality of inner blade deformation restricting members 14 are integrally formed as shown in FIGS. The inner blade deformation restricting member 14 is a disc with a part cut out, which is erected vertically so that the notch is located on the lower side, and is arranged in a direction perpendicular to the length direction over both the pair of beam members 13. The lower part of the disk to the pair of beam members 13
It refers to the structure connected to. These inner blade deformation restricting members 14 are formed at both ends of the pair of beam members 13 and at positions spaced in the length direction, respectively. In addition, the thickness t _{1 of the} upper end of each inner blade deformation regulating member 14 is set smaller than the thickness t _{2 of the} lower end. Further, the edge portion 14a at the upper end of each inner blade deformation regulating member 14 has an arc shape (so-called R shape).

The inner blade 11 is a thin square plate with a number of thin blades formed in a mesh shape. The inner blade 11 has a circular arc shape (kamaboko shape).
The inner blade base 10 is curved so as to cover the inner blade base 10 along its length, and both side edges are fixed to the pair of beam members 13 of the inner blade base 10. That is, the inner blade 11 curved in a circular arc shape (kamaboko shape) is attached to the inner blade base 10 so as to surround each inner blade deformation restriction member 14 of the inner blade base 10 from the outside. The inner blade 11 and the inner blade base 10 are fixed to each other by, for example, forming a plurality of pins 15 on the outer surfaces of a pair of beam members 13 at intervals in the lengthwise direction.
Holes are formed on both side edges of 11 respectively, and the pins 15 formed on the beam member 13 are inserted into the holes formed on the inner blade 11, and the pins 15 are caulked or welded. .

Here, the relationship between the inner blade 11 curved in an arc shape and the inner blade deformation restricting member 14 having the arc shape of the inner blade base 10 will be described. A gap is formed between the inner blade 12 and the inner blade deformation restricting member 14 of the inner blade base 11. That is, when the inner blade 11 curved in an arc shape and attached to the inner blade base 10 is in a natural state, a gap is formed between the inner blade 12 and the inner blade deformation restricting member 14 of the inner blade base 11. There is. This gap is provided by the inner blade 11 with a force enough to apply the outer blade 3 to human skin when shaving normally.
In the deformation of, the inner blade 11 does not contact the inner blade deformation regulating member 14,
Moreover, if an excessively large external force is applied to the outer blade 3,
The inner blade 11 deformed by the external force hits the inner blade deformation regulating member 14 to regulate the deformation of the inner blade 11. Further, the size A ₂ of the gap between the side portion of the inner blade 11 and the side portion of the inner blade deformation regulating member 14 which are curved in an arc shape is set to the summit of the inner blade and the top of the inner blade deformation regulating member 14. It is set smaller than the size A ₁ of the gap between the parts. The size of the arc of the inner blade deformation regulation member 14 of the inner blade base 10 is set in consideration of these conditions.

In the inner blade body 12 thus configured, the inner blade base 10 is connected to the connecting tool 9. For connecting the inner blade base 10 and the connecting tool 9, for example, the following structure is adopted. The connector 9 has arm portions at both ends. The two inner blade deformation restricting members 14 on the top of the inner blade base 10 have crosspiece members 16 formed on the surfaces facing each other along a direction orthogonal to the beam member 13, and Notches 17 are formed in the lower portions, respectively. Then, the top of the connector 9 is inserted and fixed in the gap between the crosspiece members 16 of the pair of inner blade deformation restricting members 14 in the inner blade base 10, and the arm portion of the connector 9 has the inner blade base 10.
In, a pair of inner blade deformation restricting members 14 are inserted and fixed in respective notch portions 17. Then, the inner blade body 12 is pushed up by the coil spring 7 provided on the drive shaft 6 via the connector 9, and the inner blade 11 is pressed against the outer blade 3 of the outer blade body 4.

Reference numeral 18 in the drawing denotes a shaving unit mounted on the main body 1, which is driven by the driving body 5.

In the reciprocating electric shaver of this embodiment configured as described above, the driving member 5 is driven by the electric motor through the eccentric cam mechanism.
Reciprocating, the drive shaft 6 reciprocates the inner blade body 12, and the inner blade 11 of the inner blade body 12 reciprocates along the length direction of the outer blade 3 of the outer blade body 4. Shaving is performed by this operation.

When shaving, the outer blade 3 of the outer blade body 4 is brought into contact with human skin. The inner blade body by contacting the outer blade 3 with the skin
The inner blade 11 of 12 also elastically deforms together with the outer blade 3. Here, the relationship between the inner blade 11 and the inner blade deformation regulating member 14 of the inner blade base 10 will be considered. Between the inner blade 12 and the inner blade deformation restricting member 14 of the inner blade base 11, when the inner blade 11 is deformed by the force of applying the outer blade 3 to human skin during normal shaving, A gap having a size such that 11 does not come into contact with the inner blade deformation regulating member 14 is formed. Therefore, when the inner blade 11 is deformed by a force such that the outer blade is applied to the human skin during normal shaving, the inner blade 11 does not contact the outer peripheral surface of the inner blade deformation restricting member 14. Therefore, when shaving normally, the entire inner blade 11 is in a uniform state where it does not come into contact with the inner blade deformation regulating member 14, so that the contact of the inner blade 11 with respect to the skin is uniform over the entire inner blade and the shaving feel is obtained. Is good.

Further, when an excessively large external force is applied to the outer blade 3 of the outer blade body 4 and the outer blade 3 is largely deformed, the inner blade 11 is also largely deformed together with the outer blade 3. Here, the gap between the inner blade 12 and the inner blade deformation restricting member 14 of the inner blade base 11 is such that when an external force larger than necessary is applied to the outer blade 3, the inner blade 11 deformed by this external force deforms the inner blade. The size is set so that the deformation of the inner blade 11 can be restricted by hitting the restriction member 14. For this reason, the inner blade 11 that has been deformed significantly by receiving an excessively large external force is
The inner blade deformation regulating member (14) is brought into contact with the outer peripheral portion of the inner blade deformation regulating member (14) and its deformation is regulated, and damage due to large deformation can be prevented. That is, the inner blade deformation regulating member 14 receives the deformed inner blade 11 and regulates the deformation to prevent the inner blade 11 from being damaged.

Furthermore, since a force is applied from the direction of the top of the inner blade 11 during normal shaving, the size A ₁ of the gap between the arc top of the inner blade 11 and the top of the inner blade deformation regulating member 14 is It's big. Since it is an abnormal case that an external force is applied from the side direction of the inner blade 11, the size A ₂ of the gap between the inner blade 11 and the side portion of the inner blade deformation restricting member 14 should be reduced. 11 and the outer blade 3 are prevented from being damaged. That is, when the side portion of the inner blade 11 is deformed by an external force, the side portion of the inner blade 11 comes into contact with the side portion of the inner blade deformation regulating member 14 with a smaller deformation amount than the deformation amount of the top portion of the inner blade 11. Therefore, it is possible to prevent the side portion of the inner blade 11 near the fixed portion between the inner blade 11 and the inner blade base 10 from being damaged. The side of the inner blade 11 has an inner blade 11 and an inner blade base.
The movement of the inner blade 11 is restricted by the fixed portion with 10, and the inner blade 11 is easily damaged by a small amount of deformation compared to the top portion.

In addition, the thickness t _{1 of the} upper end of each inner blade deformation regulating member 14 is set smaller than the thickness t _{2 of the} lower end. Therefore, the strength of each inner blade deformation regulating member 14 is increased. Further, the edge 14a at the upper end of each inner blade deformation regulating member 14 has an arc shape (so-called R
It is in a state. Therefore, whiskers are prevented from adhering to the edge portion 14a at the upper end of each inner blade deformation regulating member 14, and the adhered whiskers are easily dropped. Further, by making the edge 14a at the upper end of each inner blade deformation regulating member 14 into an arc shape, when a large external force is applied to the outer blade 3 and the inner blade 11 is deformed and supported by the inner blade deformation regulating member 14, It is possible to prevent the inner blade 11 from being damaged by the edge portion 14a at the upper end of the blade deformation regulating member 14.

It should be noted that the present invention is not limited to the above-described embodiment, but can be modified in various ways. For example, if the gap between the inner blade and the inner blade deformation restricting member is large at the top and small at the side, the change in the size of the space may be continuous or stepwise. Further, the inner blade deformation regulating member is not limited to the configuration of the embodiment. For example, needle-shaped objects along the length direction of the inner blade may be arranged side by side on an arc.

(Effects of the Invention) As described above, according to the reciprocating electric shaver of the present invention, a gap is formed between the inner blade and the inner blade deformation restricting member of the inner blade base. The blade can be prevented from being damaged by an external force, and the contact of the inner blade with the skin can be made uniform to improve the feel when shaving.

Further, when an external force is applied from the side portion of the inner blade, even if the inner blade of this external force is smaller than the external force applied from the top, the inner blade inner blade deformation regulating member deformed by this external force is Since it supports, it is possible to reliably prevent damage to the inner blade.

[Brief description of drawings]

The drawings show one embodiment of the present invention, FIG. 1 is a side sectional view of an electric razor, FIG. 2 is a front sectional view of an electric razor,
3 and 4 are exploded views of the electric shaver,
5 and 6 are side sectional views showing the inner blade body, and FIG. 7 is a front sectional view showing the inner blade base. 1 ... Main body, 2 ... Outer blade case, 3 ... Outer blade, 4 ... Outer blade body, 10 ... Inner blade base, 11 ... Inner blade, 12 ... Inner blade base.

Claims (2)

[Claims] 1. An outer blade body having a thin plate-shaped outer blade, a thin plate-shaped inner blade, and the inner blade curved and attached in an arc shape, and when the inner blade is deformed by an external force applied thereto, the inner blade is deformed. And an inner cutter body having an inner cutter base provided with an inner cutter deformation restricting member that receives the inner cutter, and a gap is formed between the inner cutter and the inner cutter deformation restricting member of the inner cutter base. A reciprocating electric razor characterized in that. 2. A gap between a side portion of the inner blade curved in an arc shape and an inner blade deformation regulating member facing the side portion of the inner blade is such that a top portion of the inner blade and a top portion of the inner blade. The reciprocating electric shaver according to claim 1, wherein the gap is smaller than the gap between the inner blade deformation restricting member and the inner blade deformation restricting member.