JP2011067421A - Electric shaver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the performance of following the skin of respective screen blocks, in an electric shaver including a configuration capable of two-stage float of the respective screen blocks. <P>SOLUTION: The electric shaver includes: a head portion 11 which has a built-in motor 16 and has a holding frame portion 12; a plurality of screen blocks 13 held by the holding frame portion 12; and a cutter 31 to be driven back and forth on the basis of the drive of the motor 16. The respective screen blocks 13 are floated and supported by the holding frame portion 12, and the holding frame portion 12 is floated and supported by the head portion 11. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electric razor for shaving body hair such as a heel.

  2. Description of the Related Art Conventionally, an electric razor is composed of a head portion incorporating a drive source, a holding frame portion provided on the head portion, an outer blade that is held by the holding frame portion and into which body hair can be introduced, and a support that supports the outer blade. (Plural) An outer blade block and an inner blade which is disposed inside each outer blade and is driven to reciprocate based on the drive of the drive source. In such an electric razor, for example, in Patent Document 1, each outer blade block is supported so as to be movable up and down and is urged upward by a spring (so-called float supported). Thereby, the blade surface comprised by the outer blade of each outer blade block follows the shape of the skin, and the improvement of the introduction rate into the outer blade of the wrinkle which leads to the improvement of shaving performance is aimed at.

  The electric razor is composed of a head portion and a body portion that supports the head portion, and the head portion is movable up and down at the upper end portion of the body portion and is supported by being biased upward by a spring. (Float support). In this way, each outer blade block is float-supported with respect to the head portion (or holding frame portion), and the entire head portion is float-supported with respect to the body portion. As a result, the follow-up performance of the blade surface to the skin is improved.

Japanese Patent No. 3945376

  However, in the electric razor of the above-mentioned Patent Document 1, although the two-stage float of each outer blade block is possible, the head portion has a built-in drive source, a power transmission mechanism to the inner blade, etc. There is a problem that the weight of the part is heavy and the head part is difficult to follow the skin.

  The present invention has been made in order to solve the above-mentioned problems, and its purpose is to follow the skin of each outer blade block to the skin in an electric razor having a configuration capable of two-stage float of each outer blade block. Is to improve.

  In order to solve the above-mentioned problem, the invention described in claim 1 includes a head unit having a built-in drive source and having a holding frame part, an outer blade that is held by the holding frame part and into which body hair can be introduced, and the outer An electric razor comprising a plurality of outer blade blocks made of a support that supports blades, and an inner blade that is disposed inside each outer blade and is driven to reciprocate based on driving of the drive source, Each outer cutter block is float supported with respect to the holding frame portion, and the holding frame portion is float supported with respect to the head portion.

  In the present invention, the outer blade block is float supported with respect to the holding frame portion, and the holding frame portion is float supported with respect to the head portion, thereby enabling two-stage float of each outer blade block. That is, since the two-stage float is possible by floating the holding frame that is a part of the head part, the skin of each outer blade block is compared with the configuration in which the whole head part is floated to realize the two-stage float. It is possible to improve the follow-up performance.

  According to a second aspect of the present invention, in the electric razor according to the first aspect, the float force of each outer blade block with respect to the holding frame portion is set to be smaller than the float force of the holding frame portion with respect to the head portion. It is characterized by that.

  In this invention, since each outer blade block becomes easier to float than the holding frame portion, it becomes possible to cause each outer blade block to follow fine irregularities on the skin before the holding frame portion floats greatly.

  According to a third aspect of the present invention, in the electric shaver according to the first or second aspect, the floatable amount of the holding frame portion relative to the head portion is greater than the floatable amount of each outer blade block relative to the holding frame portion. Is also set large.

In this invention, it becomes possible to make an outer blade block follow a skin more suitably.
According to a fourth aspect of the present invention, in the electric shaver according to any one of the first to third aspects, the inner blade is a biasing member interposed between the inner blade and the outer blade block. The urging force is configured to be pressed against the inner surface of the outer blade.

  In this invention, even when the outer blade is pressed against the skin and the outer blade block is floated, the pressing force of the inner blade against the outer blade is constant without increasing. It is possible to suppress an increase in the load of the drive source.

  Therefore, according to the above-described invention, in the electric razor having a configuration capable of performing the two-stage float of each outer blade block, it is possible to improve the follow-up performance of each outer blade block to the skin.

The perspective view which shows partially the electric shaver of this embodiment. The top view which shows an electric razor typically. The front view which shows an electric razor typically. Sectional drawing which shows the support structure of an outer blade block typically.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
As shown in FIG. 1, the main body portion of the electric shaver 1 according to this embodiment includes a head portion 11 and a body portion (not shown) that supports the head portion 11. The head portion 11 has a holding frame portion 12 at an upper portion thereof, and four outer blade blocks 13 are held in the holding frame portion 12.

  As shown in FIG. 3, the holding frame portion 12 is provided so as to be movable in the direction approaching and separating from the head portion 11 (up and down direction), and is moved upward (by a float compression spring 14 of the holding frame portion 12 ( It is biased in a direction away from the head portion 11. In other words, the holding frame portion 12 is float-supported in the vertical direction with respect to the head portion 11.

  More specifically, attachment portions 15 extending toward the head portion 11 are formed at both ends of the holding frame portion 12 in the left-right direction (width direction), and each attachment portion 15 penetrates in the left-right direction. An engagement hole 15a is formed. Engagement projections 11 a extending from both left and right ends of the head portion 11 are inserted into the engagement holes 15 a of the attachment portions 15, whereby the holding frame portion 12 is detached from the head portion 11. It is supported without.

  The vertical width of the engagement hole 15a is formed to be larger than the vertical width of the engagement convex portion 11a, and the vertical movement of the holding frame portion 12 is allowed. A plurality of float compression springs 14 for the holding frame portion 12 are interposed between the holding frame portion 12 and the head portion 11, and each compression spring 14 extends from the head portion 11 to the holding frame portion 12. An urging force in the direction of separating (upward) is applied. As a result, in a normal state (a state in which no downward load is applied to the outer blade block 13), the engagement convex portion 11a engages with the lower end portion of the engagement hole 15a and the upper end portion of the engagement hole 15a. There is a gap between them.

  As shown in FIGS. 1 and 2, the holding frame portion 12 has a pair of side wall portions 12a facing each other in the left-right direction and a pair of side wall portions 12b facing each other in the front-rear direction, and the side wall portions 12a, 12b. Each outer cutter block 13 is detachably mounted side by side in the front-rear direction on the inside of the frame constituted by

Each outer cutter block 13 is composed of a resin support 21 that is detachably held by the holding frame 12 and an outer cutter 22 supported by the support 21, and has a long shape that is long in the left-right direction. ing.
Each support body 21 is supported by the side wall part 12a which opposes the left-right direction of the holding frame part 12 so that a movement to an up-down direction is possible. Protrusions 21a that are formed on both sides of the support body 21 in the left-right direction are positioned in the recesses 12c formed in each side wall 12a (see FIG. 4). The vertical width of the concave portion 12c of the side wall portion 12a is formed larger than the vertical width of the protruding portion 21a. That is, each outer cutter block 13 is allowed to move in the vertical direction by a width that allows the projection 21 a to move in the vertical direction, and the concave portion 12 c and the projection 21 a serve to prevent the outer cutter block 13 from coming off. .

  Each outer blade block 13 is float supported with respect to the holding frame portion 12. Specifically, as shown in FIG. 4, a plurality of float compression springs 23 for the outer blade block 13 are interposed between the support 21 of each outer blade block 13 and the bottom 12 d of the holding frame portion 12. The compression spring 23 applies an upward biasing force to the outer blade block 13. When each outer blade block 13 receives a load from above, it sinks downward against the urging force of the compression spring 23, and when the load disappears, the urging force of the compression spring 23 causes the normal position (protrusion) shown in FIG. The portion 21a returns to the position where it abuts against the upper end of the recess 12c.

  The urging force of the compression spring 23 for the float of each outer blade block 13 (the float force of each of the outer blade blocks 13) is the urging force of the compression spring 14 for float of the holding frame portion 12 (the float of the holding frame portion 12). Force)). Further, the floatable amount of the holding frame portion 12 with respect to the head portion 11 (the maximum movable amount in the vertical direction) is set to be larger than the floatable amount of each outer blade block 13 with respect to the holding frame portion 12.

  Each outer blade 22 is formed with a large number of introduction holes (not shown) through which hairs can be introduced into a thin metal plate. On the inner side of each outer blade 22, an inner blade 31 that is reciprocally oscillated in the left-right direction by driving of a motor 16 (see FIG. 4) provided in the head portion 11 is provided. The outer cutter 22 is composed of three types, a net outer cutter for rough shaving, a net outer cutter for finishing, and a slit outer cutter suitable for shaving long body hair.

  A plurality of compression springs 32 (biasing members) for pressing the inner blade are interposed between the inner blade 31 and the bottom portion 21 b of the support 21, and the compression spring 32 is directed upward with respect to the inner blade 31. Energizing force is given. Thereby, the inner blade 31 is pressed against the inner surface 22 a of the outer blade 22 by the compression spring 32.

  The motor 16 is driven based on an operation of an operation switch (not shown) provided on the body, and each inner blade 31 is reciprocally oscillated by the driving force. Then, body hair such as wrinkles introduced into each outer blade 22 is cut between the outer blade 22 and the inner blade 31 that reciprocally vibrates.

  In the electric razor 1 as described above, since the float force of each outer blade block 13 is set smaller than the float force of the holding frame portion 12, when the outer blade 22 is pressed against the skin, the holding frame portion. Each outer blade block 13 is easier to float than 12. For this reason, the blade surface constituted by the outer cutter 22 of each outer cutter block 13 follows the skin by the float of each outer cutter block 13 before the holding frame portion 12 floats greatly. And when the load applied to the outer blade block 13 becomes a predetermined value or more, the inclination of the holding frame portion 12 follows the skin in a state where each outer blade block 13 follows the skin, and as a result, a more suitable shaving taste is obtained. It is like that.

Next, characteristic effects of the present embodiment will be described.
(1) In the present embodiment, the head portion 11 having the motor 16 and having the holding frame portion 12, the plurality of outer blade blocks 13 held by the holding frame portion 12, and the motor 16 are driven to reciprocate. The outer cutter block 13 is float-supported with respect to the holding frame portion 12, and the holding frame portion 12 is float-supported with respect to the head portion 11. That is, since the two-stage float of the outer cutter block 13 is possible by floating the holding frame part 12 which is a part of the head part 11, compared with the configuration in which the entire head part 11 is floated to realize the two-stage float. Thus, it is possible to improve the follow-up performance of each outer blade block 13 to the skin.

  (2) In this embodiment, the float force of each outer blade block 13 with respect to the holding frame portion 12 is set to be smaller than the float force of the holding frame portion 12 with respect to the head portion 11. As a result, each outer blade block 13 becomes easier to float than the holding frame portion 12, so that each outer blade block 13 can follow the fine unevenness of the skin before the holding frame portion 12 floats greatly. It becomes.

  (3) In this embodiment, the floatable amount of the holding frame portion 12 with respect to the head portion 11 is set to be larger than the floatable amount of each outer blade block 13 with respect to the holding frame portion 12, so It becomes possible to make it follow more suitably.

  (4) In the present embodiment, each inner blade 31 is pressed against the inner surface of the outer blade 22 by the urging force of the inner blade pressing compression spring 32 interposed between the inner blade 31 and the outer blade block 13. Configured to be As a result, even when the outer blade 22 is pressed against the skin and the outer blade block 13 is floated, the pressing force of the inner blade 31 against the outer blade 22 does not increase and is constant, so that the pressing force is increased. It becomes possible to suppress an increase in temperature and an increase in load on the motor 16.

In addition, you may change embodiment of this invention as follows.
In the above embodiment, the compression spring 32 for pressing the inner blade is interposed between the inner blade 31 and the bottom portion 21b of the support body 21. However, for example, the inner blade 31 and the bottom portion of the holding frame portion 12 can be used. You may interpose between 12d or between the inner blade 31 and the head part 11. FIG.

  In the above-described embodiment, the floatable amount of the holding frame portion 12 with respect to the head portion 11 is set to be larger than the floatable amount of each outer blade block 13 with respect to the holding frame portion 12, but conversely, the float of the holding frame portion 12 The possible amount may be set smaller than the floatable amount of each outer blade block 13.

  In the above embodiment, the float force of each outer blade block 13 with respect to the holding frame portion 12 is set to be smaller than the float force of the holding frame portion 12 with respect to the head portion 11. May be set larger than the float force of the holding frame portion 12. According to this configuration, the holding frame portion 12 is more likely to float than the outer blade blocks 13, and the shaving taste for flat skin can be improved.

  In the above embodiment, the number and arrangement positions of the compression spring 14 for the float of the holding frame 12, the compression spring 23 for the float of each outer blade block 13, and the compression spring 32 for pressing the inner blade depend on the configuration. May be changed as appropriate.

  In the above-described embodiment, the configuration is a so-called four-blade configuration in which four outer cutter blocks 13 are provided. However, the configuration is not particularly limited to this, and there are two-blade, three-blade, or five-blade or more. It is good also as a structure of.

  In the above embodiment, the head portion 11 may be configured to be fixed with respect to the trunk portion, or may be configured to be movable with respect to the trunk portion. When the head portion 11 is configured to be movable in the vertical direction with respect to the body portion, the outer blade block 13 can have a three-stage float operation.

  DESCRIPTION OF SYMBOLS 1 ... Electric razor, 11 ... Head part, 12 ... Holding frame part, 13 ... Outer blade block, 21 ... Support body, 22 ... Outer blade, 22a ... Inner surface of outer blade, 31 ... Inner blade, 32 ... As biasing member Compression spring.

Claims (4)

A head unit that incorporates a drive source and has a holding frame;
A plurality of outer blade blocks comprising an outer blade held by the holding frame and capable of introducing body hair, and a support that supports the outer blade;
An electric razor provided with an inner blade disposed inside each outer blade and driven to reciprocate based on driving of the drive source,
Each of the outer blade blocks is float-supported with respect to the holding frame portion, and the holding frame portion is float-supported with respect to the head portion. The electric razor according to claim 1,
The electric razor according to claim 1, wherein a float force of each outer cutter block with respect to the holding frame portion is set to be smaller than a float force of the holding frame portion with respect to the head portion. The electric shaver according to claim 1 or 2,
The electric razor according to claim 1, wherein a floatable amount of the holding frame portion with respect to the head portion is set larger than a floatable amount of each outer blade block with respect to the holding frame portion. In the electric shaver according to any one of claims 1 to 3,
Each of the inner blades is configured to be pressed against the inner surface of the outer blade by a biasing force of a biasing member interposed between the inner blade and the outer blade block.

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