JP2023168506A - Reciprocating electric shaver - Google Patents

Abstract

To provide a reciprocating electric shaver capable of widening a contact area with the skin by increasing the number of outer blades.SOLUTION: The reciprocating electric shaver includes outer blades and inner blades reciprocating right and left while sliding on inner surfaces of the outer blades. The outer blades comprise a plurality of first outer blades and a plurality of second outer blades having different shapes from the first outer blades. The inner blades comprise first inner blades corresponding to the first outer blades and second inner blades corresponding to the second outer blades. The first outer blades and the first inner blades constitute cutting blades, and the second outer blades and the second inner blades constitute trimmer blades. Six of the cutting blade, trimmer blade, cutting blade, cutting blade, trimmer blade, and cutting blade are aligned in this order.SELECTED DRAWING: Figure 4

Description

The present invention relates to a reciprocating electric shaver.

In recent years, efforts have been made to increase the number of outer blades in the head of reciprocating electric shavers in order to increase the contact area with the skin. The outer cutter is used in combination with the corresponding inner cutter, and the inner cutter is reciprocated by two oscillators. The outer cutter is generally composed of a combination of a cutter blade and a trimmer blade.

BACKGROUND ART Conventionally, a reciprocating electric shaver having a configuration in which a head portion is provided with five outer cutters has been known (Patent Document 1: Japanese Patent Laid-Open No. 2011-067420).

JP2011-067420A

SUMMARY OF THE INVENTION An object of the present invention is to provide a reciprocating electric shaver that can increase the number of outer blades and widen the area of contact with the skin.

The reciprocating electric shaver according to the present invention is a reciprocating electric shaver that includes an outer cutter and an inner cutter that reciprocates from side to side while slidingly contacting the inner surface of the outer cutter. The outer cutters include a plurality of first outer cutters and a plurality of second outer cutters having a shape different from the first outer cutters. The inner cutter includes a first inner cutter corresponding to the first outer cutter and a second inner cutter corresponding to the second outer cutter. The first outer cutter and the first inner cutter constitute a cut blade, and the second outer cutter and the second inner cutter constitute a trimmer blade. The cutting blade, the trimmer blade, the cut blade, the cut blade, the trimmer blade, and the cut blade are provided in six rows in the order of description. Further, the cut blade and the trimmer blade are provided so as to be movable up and down. Among the six cut blades, the trimmer blade, the cut blade, the cut blade, the trimmer blade, and the cut blade arranged in the order of description, the trimmer is arranged second in line compared to the cut blade arranged first. The elevation amount of the blade is set to be small, and the elevation amount of the fifth trimmer blade is set to be smaller than that of the sixth cutting blade.

According to this configuration, the six outer blades are arranged side by side on the upper surface side of the main body, so that the area of contact with the skin can be increased. Also, since the six outer blades are arranged symmetrically in the front and back, you can get the same shaving experience from either the front or the back, regardless of how you hold the main body.

FIG. 1 is a schematic perspective view showing an example of a reciprocating electric shaver according to a first embodiment of the present invention. FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG. FIG. 3 is a schematic structural development diagram of FIG. 1. FIG. 4 is a schematic cross-sectional view showing an example of the arrangement of the outer cutter and the inner cutter in the first embodiment. FIG. 5A is a schematic side view showing an example of an arm section in the first oscillator, and FIG. 5B is a schematic side view showing an example of the arm section in the second oscillator. FIG. 6 is a schematic side view showing an example of an outer cutter holding frame to which an outer cutter is attached. FIG. 7 is a schematic perspective view showing an example of an outer cutter holding frame to which an outer cutter is attached. 8A to 8E are schematic perspective views showing examples of arrangement of reinforcing portions in the first oscillator, respectively. FIG. 9 is a schematic structural development diagram showing an example of a reciprocating electric shaver according to a second embodiment of the present invention. FIG. 10 is a schematic cross-sectional view showing an example of the arrangement of the outer cutter and the inner cutter in the second embodiment. FIG. 11A is a schematic side view showing an example of a first oscillator, and FIG. 11B is a schematic side view showing an example of a second oscillator. FIG. 12A is a schematic side view showing an example of an arm portion in the first oscillator, and FIG. 11B is a schematic side view showing an example of the arm portion in the second oscillator. FIG. 13A is a schematic side view showing an example of a first oscillator, and FIG. 13B is a schematic side view showing an example of a second oscillator. FIG. 14A is a schematic side view showing an example of an arm portion in the first oscillator, and FIG. 14B is a schematic side view showing an example of the arm portion in the second oscillator.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The present embodiment is a reciprocating electric shaver 1 in which a motor 5, a power supply section 22, and a control section 23 are built into the main body 2, and the inner cutter 12 is reciprocated by the driving force of the motor 5. Known techniques can be applied to the motor 5, power supply section 22, and control section 23. In addition, in all the figures for explaining the embodiment, members having the same function are given the same reference numerals, and repeated explanation thereof may be omitted.

(First embodiment)
As shown in FIGS. 1 to 3, a reciprocating electric shaver 1 includes, for example, a main body 2 formed with a grip portion to be held by a user, a power switch 21 disposed on the front of the main body 2, and a main body 2. The blade frame 3 is attached to the upper head portion 2a of the blade 2. A plurality of outer cutters 11 are arranged in the cutter frame 3, and the outer cutters 11 are used in combination with the corresponding inner cutters 12. In this example, six or more outer cutters 11 are arranged on the upper surface side of the main body 2, and each inner cutter 12 is configured to reciprocate in the longitudinal direction of the outer cutter 11 while slidingly contacting the inner surface of the outer cutter 11. It has become. The outer cutter 11 is attached to the outer cutter holding frame 4 so as to be able to follow the vertical movement of each inner cutter 12, and the outer cutter holding frame 4 is detachably attached to the cutter frame 3.

The outer cutter 11 includes a plurality of first outer cutters 11a and a plurality of second outer cutters 11b having a different shape from the first outer cutters 11a. Further, the inner cutter 12 includes a first inner cutter 12a that corresponds one-to-one to the first outer cutter 11a, and a second inner cutter 12b that corresponds one-to-one to the second outer cutter 11b. The first outer cutter 11a and the first inner cutter 12a constitute a wide-angle cutting blade 10a, and the second outer cutter 11b and the second inner cutter 12b constitute a trimmer blade 10b. 10b is arranged adjacent to the cutting blade 10a. By arranging the trimmer blade 10b adjacent to the cutting blade 10a, the spacing between the outer blades is narrowed, and the size of the head portion 2a can be suppressed from increasing. In order to make it easier to explain the positional relationship of each part of the reciprocating electric shaver 1, the directions are indicated by arrows in the drawings, and in this specification, the front of the main body 2 is referred to as "front", The back side is sometimes written as "rear".

The examples shown in FIGS. 1 to 3 have a structure in which the head portion 2a swings left and right or front and back with the main body 2 as a reference. Further, the main body 2 has a structure in which a scraping blade 13 and a slide switch 25 are arranged on the back side. The scraping blade 13 has a third outer cutter made of a metal plate processed into a comb shape on one side, which is attached to a resin frame, and a third inner cutter corresponding to the third outer cutter is attached to the inner surface of the third outer cutter. It is configured to reciprocate in the longitudinal direction of the third outer cutter while making sliding contact. Then, when the slide switch 25 is slid upward to raise the scraping blade 13, the fourth arm 18d of the arm portion 8d of the second oscillator 8 is connected, and the second oscillator 8 and the scraping blade 13 can be interlocked. The inner cutter of the scraping blade 13 is reciprocated by the driving force of the motor 5. In other words, the second oscillator 8 and the scraping blade 13 are configured to be able to interlock with each other when the slide switch 25 is slid upward and the scraping blade 13 is erected. A known technique can be applied to the scraping blade 13. Note that the present invention is not limited to the above-mentioned configuration, and for example, the main body 2 and the head portion 2a may be integrally formed, or the scraping blade 13 may be omitted.

As shown in FIG. 2, the main body 2 includes a crank part 6 that converts the rotational motion of the drive shaft 5a of the motor 5 into linear motion, and the inner cutter 12 is reciprocated by the driving force of the motor 5 via the crank part 6. A first oscillator 7 and a second oscillator 8 are provided, and a presser plate 24 is attached and fixed to the head portion 2a. Here, the first oscillator 7 is arranged near the front of the main body 2, and the second oscillator 8 is arranged near the back of the main body 2. The drive shaft 5a is connected to an elongated hole 7e formed in the movable base 7a of the first oscillator 7 and an elongated hole 8e formed in the movable base 8a of the second oscillator 8 through the crank portion 6. . As an example, a known technique such as that described in Japanese Patent Laid-Open No. 2018-187045 can be applied to the crank portion 6.

FIG. 4 is a schematic diagram showing an example of the arrangement of the outer cutter 11 and the inner cutter 12 in FIG. It is. As an example, in the outer cutter 11, four first outer cutters 11a are arranged symmetrically in the front and back, two second outer cutters 11b having a different shape from the first outer cutter 11a are arranged symmetrically in the front and back, and adjacent The first outer cutter 11a and the second outer cutter 11b, which are arranged to meet each other, are connected to each other so as to be movable up and down.

As an example, the first outer cutter 11a has a structure in which a metal plate in which fine holes are formed has an inverted U-shaped cross section and is attached to a resin frame. As an example, the second outer cutter 11b is constructed by attaching a pair of metal plates, each of which has a comb shape on one side, to a resin frame. The inner cutters 12 are arranged in one-to-one correspondence with the outer cutters 11, with a first inner cutter 12a having an inverted U-shaped cross section corresponding to the first outer cutter 11a, and a cross section corresponding to the second outer cutter 11b. The second inner cutter 12b has an inverted L shape and is arranged symmetrically in the front and rear. As an example, the first inner cutter 12a is biased by a coil spring 12j and reciprocates in the longitudinal direction of the first outer cutter 11a while slidingly contacting the inner surface of the first outer cutter 11a. The second inner cutter 12b is attached inside the second outer cutter 11b and reciprocates in the longitudinal direction of the second outer cutter 11b while slidingly contacting the inner surface of the second outer cutter 11b. The first outer cutter 11a and the first inner cutter 12a constitute a wide-angle cutting blade 10a, and have a so-called arch shape when viewed in cross section. The second outer cutter 11b and the second inner cutter 12b constitute a trimmer blade 10b, and have a so-called T-shape when viewed in cross section. The composition ratio of the cut blade 10a and the trimmer blade 10b in the outer blade 11 is arbitrary. Known techniques can be applied to the outer cutter 11 and the inner cutter 12.

As shown in FIG. 1, six or more outer cutters 11 of this embodiment are arranged. With this configuration, it is possible to more reliably shave areas with large undulations, such as the chin, while increasing the area of contact with the skin compared to conventional products. Furthermore, since the plurality of outer blades 11 are arranged symmetrically in the front and back, the same shaving quality can be obtained from either the front or the back, regardless of how the main body 2 is held. Further, it is possible to arrange a large number of outer cutters 11 while suppressing an increase in the size of the head portion 2a.

As shown in FIG. 4, the first outer cutter 11a, the second outer cutter 11b, the first outer cutter 11a, the first outer cutter 11a, the second outer cutter 11b, and the first outer cutter 11a are arranged symmetrically in the order of front and rear. There is. Thereby, the first inner cutter 12a, the second inner cutter 12b and the first inner cutter 12a are reciprocated by the first oscillator 7, and the first inner cutter 12a and the second inner cutter are reciprocated by the second oscillator 8. 12b and the first inner cutter 12a can be in the same combination. Therefore, it is possible to easily maintain the balance between the driving forces that drive the first oscillator 7 and the second oscillator 8. Furthermore, since the T-shaped trimmer blade 10b is arranged to fill the gap between the arch-shaped cutting blades 10a, the size of the head portion 2a can be minimized.

As an example, in the case of a configuration in which six outer cutters 11 are arranged on the upper surface side of the main body 2, the number of inner cutters 12 distributed to the first oscillator 7 is 2, 3, or 4.

In the example shown in FIGS. 3, 5A, and 5B, the number of inner blades 12 distributed to the first oscillator 7 is set to 3, and the number of inner blades 12 distributed to the second oscillator 8 is set to 3. , the configuration maintains a balance between the driving forces that drive the first oscillator 7 and the second oscillator 8.

5A is a schematic side view showing an example of the arm portion 7d in the first oscillator 7, and FIG. 5B is a schematic side view showing an example of the arm portion 8d in the second oscillator 8. The arm portion 7d includes a first arm 17a, a second arm 17b, a third arm 17c, an arm support portion 17e, and an arm attachment portion 17f that are integrally molded. Further, the arm portion 8d includes a first arm 18a, a second arm 18b, a third arm 18c, a fourth arm 18d, an arm support portion 18e, and an arm attachment portion 18f that are integrally molded.

The first arm 17a, the second arm 17b, and the third arm 17c of the arm portion 7d are erected upward at equal intervals, and the arm attachment portion 17f is attached and fixed to the arm receiving portion of the first oscillator 7. The first arm 18a, the second arm 18b, and the third arm 18c of the arm part 8d are arranged upwardly at equal intervals, the fourth arm 18d is attached downwardly, and the arm attachment part 18f is attached to the second arm 18d. It is attached and fixed to the arm receiving part of the oscillator 8.

One of the inner cutters 12 is attached to the arm portion 7d of the first oscillator 7 on the first center line P1 in the vertical direction. Here, the first inner cutter 12a is attached to the first arm 17a, the second inner cutter 12b is attached to the second arm 17b, and the first inner cutter 12a is attached to the third arm 17c. Further, the arm attachment portion 17f is disposed at a position directly below the second arm 17b via the arm support portion 17e. According to this configuration, in the first oscillator 7, the three inner cutters 12 are arranged symmetrically in the front and back with respect to the first center line P1, so that the load balance of the first oscillator 7 can be maintained.

One of the inner cutters 12 is attached to the arm portion 8d of the second oscillator 8 on a second center line P2 that is parallel to the first center line P1. Here, the first inner cutter 12a is attached to the first arm 18a, the second inner cutter 12b is attached to the second arm 18b, and the first inner cutter 12a is attached to the third arm 18c. Thereby, in the second oscillator 8, the three inner cutters 12 are arranged symmetrically in the front and rear with respect to the second center line P2 in the vertical direction. On the other hand, the arm attachment portion 18f is disposed at a position in front of the position directly below the second arm 17b via the arm support portion 17e. Thereby, the load balance of the second oscillator 8 can be maintained.

That is, the arm portion 7d of the first oscillator 7 has one of the second inner cutters 12b attached on or near the first center line P1 in the vertical direction of the first oscillator 7. In addition, one of the second inner cutters 12b is attached to the arm portion 8d of the second oscillator 8 on or near the second center line P2 in the vertical direction of the second oscillator 8. This is the configuration that is used. According to this configuration, one of the second inner cutters 12b, which has a larger load when reciprocating while making sliding contact than the first inner cutter 12a, is located on the first center line P1 or at the first center in the vertical direction. Since one of the second inner cutters 12b is installed on the second center line P2 or closer to the second center line P2 in the vertical direction, the first oscillator It is possible to easily maintain a balance between the driving forces that drive the oscillator 8 and the second oscillator 8.

As shown in FIGS. 3 and 5A, the arm portion 7d of the first oscillator 7 has a first arm 17a, a second arm 17b, and a third arm 17c arranged at equal intervals directly above the arm support portion 17e. , the arm attachment portion 17f is disposed directly below the arm support portion 17e, and the arm attachment portion 17f is erected and fixed on the movable base 7a, and the arm attachment portion 17f of the first oscillator 7, The second arm 17b to which the second inner cutter 12b is attached is arranged at a position that overlaps with the second arm 17b in plan view. Furthermore, as shown in FIGS. 3 and 5B, the arm portion 8d of the second oscillator 8 has a first arm 18a, a second arm 18b, and a third arm 18c arranged at equal intervals directly above the arm support portion 18e. The arm mounting portion 18f is disposed directly below the arm support portion 18e, the arm mounting portion 18f is erected and fixed on the movable base 8a, and the arm mounting portion of the second oscillator 8 18f and the second arm 18b to which the second inner cutter 12b is attached are arranged at positions that overlap in plan view. This makes it easy to maintain a balance between the driving forces that drive the first oscillator 7 and the second oscillator 8.

As shown in FIG. 2, the axis P3 of the drive shaft 5a of the motor 5 is located at a rear position within a range that does not reach the first arm 18a, with the position exactly intermediate between the third arm 17c and the first arm 18a as a reference. Become. As an example, the axis P3 of the drive shaft 5a is located at the rear within a range of 0.5 [mm] or more and 1.5 [mm] or less with respect to the exact middle position between the third arm 17c and the first arm 18a. Be in position. Thereby, the load balance between the first oscillator 7 and the second oscillator 8 can be easily maintained. Note that when the configuration does not include the scraping blade 13, the second oscillator 8 has the same arrangement as the first oscillator 7, so the axis P3 of the drive shaft 5a is aligned with the third arm 17c and the first arm 18a. It will be exactly in the middle position.

FIG. 6 is a schematic side view showing an example of the outer cutter holding frame 4 to which the first outer cutter 11a and the second outer cutter 11b are attached. The outer blade holding frame 4 has a first window section 14a, a second window section 14b, a third window section 14c, a fourth window section 14d, a fifth window section 14e, and a sixth window section at predetermined intervals from the front to the rear. Portions 14f are formed on both sides. Convex portions 11d formed on both sides of the first outer cutter 11a and the second outer cutter 11b are attached to each window, and the first outer cutter 11a and the second outer cutter 11b are attached to each window. Each convex part is configured to be able to move up and down within the range in which it can slide up and down.

The first outer cutter 11a and the second outer cutter 11b are configured to be able to move up and down independently. Here, the first outer cutter 11a has a configuration in which the amount of elevation at a position near the front of the main body 2 and the amount of elevation at a position near the back of the main body 2 are both larger than the amount of elevation at a position near the center of the main body 2. It is. As a result, when shaving an area with large undulations such as the chin, the first outer blade 11a near the front of the main body 2 or the first outer blade 11a near the back of the main body 2, which tends to hit the area with large undulations first, Since the stroke can be made larger than that of the first outer cutter 11a located closer to the center, the beard can be captured and shaved more reliably. Here, the amount of elevation of the second outer cutter 11b is the same as that of the first outer cutter 11a at a position near the front of the main body 2 and the amount of elevation at a position near the back of the main body 2. Note that, without being limited to the above configuration, the first outer cutter 11a and the second outer cutter 11b are arranged so that the amount of elevation thereof gradually decreases from the front side of the main body 2 toward the center, and also increases and decreases from the back side of the main body 2 toward the center. In some cases, the amount of elevation is gradually reduced.

FIG. 7 is a schematic perspective view showing an example of the outer cutter holding frame 4 to which the first outer cutter 11a and the second outer cutter 11b are attached. The outer cutter holding frame 4 includes a shaft-shaped member 9 that guides the first outer cutter 11a and the second outer cutter 11b to move up and down and restricts the range in which the first outer cutter 11a and the second outer cutter 11b can move up and down. have. The shaft member 9 is disposed at a predetermined position in the longitudinal direction of the outer cutter holding frame 4, and the axis of the shaft member 9 is oriented in the lateral direction of the outer cutter holding frame 4. Here, the first outer cutter 11a and the second outer cutter 11b, which are arranged adjacent to each other, are connected to each other so as to be movable up and down. According to this configuration, by disposing the shaft member 9, it is possible to prevent the vertical movement of the outer cutter 11 from becoming erratic. In other words, the shaft-like member 9 guides the plurality of outer cutters 11 to move up and down smoothly, and also restricts the range in which they can move up and down, so even if the number of outer cutters 11 in the head section 2a is increased, the outer cutters 11 can be moved smoothly. The configuration allows for easy lifting and lowering operations. In addition, since the guide plate that partitions the first outer cutter 1 and the first outer cutter, which is the case with conventional products, is eliminated, the head portion 2a is configured to be further miniaturized. In other words, by arranging the shaft member 9, the range in which the first outer cutter 11a and the second outer cutter 11b can move up and down is regulated within an appropriate range for shaving, and smooth up and down movement is possible. Becomes a composition. Moreover, the reciprocating electric shaver 1 is provided with a small and easy-to-use head portion 2a.

The shaft member 9 is made of resin, metal, ceramics, or a composite material thereof. The shaft portion of the shaft member 9 has a guide function, and is, for example, pin-shaped or rod-shaped. The cross-sectional shape of the shaft portion of the shaft member 9 is circular, elliptical, square, rectangular, triangular, or polygonal.

The shaft-like member 9 has an axis in the lateral direction of the outer cutter holding frame 4, is disposed at a predetermined position in the longitudinal direction of the outer cutter holding frame 4, and is attached to the first outer cutter 11a and the second outer cutter 11b. The range in which the robot can move up and down is regulated. According to this configuration, even if the number of outer cutters 11 is greater than that of conventional products, smooth lifting and lowering operations are possible. As an example, the shaft-like member 9 is disposed at a position closer to the left or a position closer to the right in the longitudinal direction of the outer cutter holding frame 4 . This provides a configuration in which each of the outer cutters 11 has a high degree of freedom in raising and lowering movements. As an example, sharpened portions formed at both ends of the shaft-like member 9 are fitted into through holes 14g formed on both sides of the outer cutter holding frame 4. Note that the configuration is not limited to the above configuration, and it is also possible to have a configuration in which flanges are attached to both ends of the shaft-like member 9 and the flanges of the shaft-like member 9 are attached to guide grooves formed on the inner walls on both sides of the outer cutter holding frame 4. It is.

The first outer cutter 11a has a slit 11c formed upward from the bottom surface. The shaft-like member 9 passes through the slit 11c, and the slit 11c is configured to slide on the shaft-like member 9. Here, the shaft member 9 is fitted into the slit 11c. As a result, the first outer cutter 11a and the second outer cutter 11b can be tilted left and right, and can be moved up and down, so the outer cutter 11 and the inner cutter 12 can have a high degree of freedom of movement. Become. Furthermore, the assembly when attaching the first outer cutter 11a, the second outer cutter 11b, and the shaft-shaped member 9 to the outer cutter holding frame 4 becomes easier, and maintenance becomes easier.

As shown in FIG. 3, the first oscillator 7 is arranged near the front of the main body 2, and the second oscillator 8 is arranged near the back of the main body 2. The first oscillator 7 includes a movable base 7a that can reciprocate, a support part 7b disposed at both ends of the movable base 7a to suspend the movable base 7a, and a support part 7b disposed at both ends of the support part 7b to support the main body 2. It has a mounting part 7c which is mounted inside by a fixing means such as a screw, and an arm part 7d which is erected and fixed on the movable table 7a and whose upper end part is removably attached to the inner cutter 12. Further, the second oscillator 8 includes a movable base 8a capable of reciprocating, a support portion 8b disposed at both ends of the movable base 8a to suspend the movable base 8a, and a main body disposed at both ends of the support portion 8b. 2, and an arm portion 8d which is fixedly erected on the movable base 8a and whose upper end is removably attached to the inner cutter 12. The support portions 7b and 8b are U-shaped (including substantially U-shaped) when viewed from the front. The movable base 7a and the movable base 8a are reciprocated left and right by crank portions 6 connected to the elongated holes 7e and 8e, respectively.

For example, the conventional product has a structure in which five outer cutters are provided in the head part, and an arm part is fixed upright on a movable table in one oscillator and the upper end is removably attached to the inner cutter. The position is further away from the axis of the drive shaft of the motor than the position of the arm part of the other oscillator, which is erected and fixed on the movable table and whose upper end is removably attached to the inner cutter. Therefore, there is a problem in that lateral vibration is likely to occur in the arm portion, and when lateral vibration occurs, the oscillator vibrates abnormally. If the number of outer cutters is increased further than before, abnormal vibrations will become more likely. Therefore, the upper limit of the number of outer cutters provided in the head portion was five.

Therefore, as shown in FIG. 2, in this embodiment, the distance between the axis P3 of the drive shaft 5a and the first center line of the arm part 7d is smaller than the distance between the axis P3 of the drive shaft 5a and the second center line P2 of the arm part 8d. By increasing the distance from the line P1, the number of outer cutters 11 can be increased compared to conventional products.

As shown in FIGS. 8A to 8E, the first oscillator 7 of this embodiment has a reinforcing portion 7f that reinforces the connection between the movable base 7a and the support portion 7b, extending from the support portion 7b toward the elongated hole 7e. Ru. The reinforcing portion 7f is a portion surrounded by a broken line in the figure. According to this configuration, since the reinforcing portion 7f can prevent horizontal vibration of the arm portion 7d, abnormal vibration of the first oscillator 7 can be prevented. Thereby, the arm portion 7d of the first oscillator 7 can be positioned farther from the drive shaft 5a of the motor 5 than the arm portion 8d of the second oscillator 8. Therefore, the degree of freedom in combining the outer cutters 11 is increased, and even if the number of outer cutters 11 is greater than that of the conventional product, smooth reciprocation of the first oscillator 7 and the second oscillator 8 is possible. The second oscillator 8 can also have the same configuration as the first oscillator 7.

The first oscillator 7 connects the movable table 7a and the support part 7b to one side of the support part 7b and the support part 7b, mainly for the purpose of increasing the rigidity and improving the durability when reciprocating left and right at high speed. A rectangular and plate-shaped first beam portion 7h directly connects one side of the portion 7b, and a triangular and plate-shaped first connecting portion 7g extending from the other side of the support portion 7b to the other side of the support portion 7b. It is set up. The second oscillator 8 can also have the same configuration as the first oscillator 7.

When the number of outer blades 11 is increased compared to the conventional product, the position of the elongated hole 7e of the first oscillator 7 is located away from the position of the attachment part 7d1 to which the arm part 7d is attached, and the peripheral part of the elongated hole 7e is located at the support part. 7b and the first connecting portion 7g. As a result, there is a problem in that the arm portion 7d is prone to lateral wobbling, and when lateral wobbling occurs, the oscillator vibrates abnormally. As shown in FIGS. 8A to 8E, when the elongated hole 7e is located at a position protruding from the first connecting portion 7g, lateral wobbling occurs in the arm portion 7d. On the other hand, if the width of the support portion 7b is increased, the load increases, making it difficult to reciprocate at high speed. Therefore, in this embodiment, a reinforcing part 7f that reinforces the connection between the movable base 7a and the support part 7b is extended from the support part 7b toward the elongated hole 7e to prevent twisting of the elongated hole 7e, and the arm part It has a structure that prevents the horizontal shake of 7d. The second oscillator 8 can also have the same configuration as the first oscillator 7.

The reinforcing portion 7f has an overhanging structure. Thereby, it is possible to prevent twisting of the elongated hole 7e while reducing the weight load. A pair of reinforcing portions 7f are provided on the left and right sides. As an example, the reinforcing portion 7f has a rib structure. For example, the overhang structure is formed by vertical ribs, horizontal ribs, or a combination of vertical ribs and horizontal ribs.

In the example of FIG. 8A, the reinforcing portion 7f is configured by a triangular plate-shaped second connecting portion and a plate-shaped second beam portion directly connected to the first connecting portion 7g on the side surface side. Thereby, the driving force from the crank portion 6 connected to the elongated hole 7e can be efficiently converted into reciprocating motion. In the example of FIG. 8B, the reinforcing part 7f includes a triangular plate-shaped second connecting part, a plate-shaped second beam part directly connected to the first connecting part 7g on the side, and a first connecting part 7g on the top side. It is constituted by a plate-shaped third beam portion that is directly connected to the third beam portion. Thereby, the driving force from the crank portion 6 connected to the elongated hole 7e can be efficiently converted into reciprocating motion. In the example of FIG. 8C, the reinforcing portion 7f is configured by a trapezoidal plate-shaped second connecting portion. Thereby, it is possible to prevent twisting of the elongated hole 7e while reducing the weight load.

In the example of FIG. 8D, the reinforcing portion 7f is constituted by a rectangular plate-shaped second connecting portion. Thereby, it is possible to prevent twisting of the elongated hole 7e while reducing the weight load. In the example of FIG. 8E, the reinforcing portion 7f has a configuration in which the movable base 7a is extended toward the elongated hole 7e. Thereby, it is possible to prevent twisting of the elongated hole 7e while minimizing the weight load.

As an example, the first oscillator 7 is made of a relatively lightweight engineering plastic such as polyacetal. The configurations of FIGS. 8A to 8C are particularly preferred because the weight load is reduced. Further, as an example, the first oscillator 7 is formed of a material such as a higher density engineering plastic such as a liquid crystal polymer or a highly elastic metal. The configurations shown in FIGS. 8D to 8E are particularly preferred because of their increased rigidity. The second oscillator 8 can also have the same configuration as the first oscillator 7. In addition, in the structure in which the shaft-like member 9 is arranged, a guide plate is provided to partition the first outer cutters 11a and the first outer cutters 11a arranged next to each other. It is also possible to adopt a configuration in which the outer cutters 11a are partitioned by the guide plate and connected to each other in a sliding structure so as to be movable up and down. As an example, in the case of a configuration in which six outer cutters 11 are arranged on the upper surface side of the main body 2, the number of inner cutters 12 distributed to the first oscillator 7 is 2, 3, or 4. Further, in the case of a configuration in which six outer cutters 11 are arranged on the upper surface side of the main body 2, the number of inner cutters 12 distributed to the second oscillator 8 is 4, 3, or 2.

(Second embodiment)
FIG. 9 is a schematic structural development view showing an example of the reciprocating electric shaver 1 according to the second embodiment, and FIG. 10 is a schematic cross-sectional view showing an example of the arrangement of the outer cutter 11 and the inner cutter 12. The second embodiment will be explained mainly on the points that are different from the first embodiment.

As shown in FIGS. 9 and 10, the outer cutter holding frame 4 has a guide plate 19 that restricts the range in which the first outer cutter 11a can move up and down. In the second embodiment, the shaft-like member 9 is not provided. Here, the first outer cutter 11a and the second outer cutter 11b, which are arranged adjacent to each other, are connected to each other so that they can move up and down, and the first outer cutter 11a and the first outer cutter 11b, which are arranged next to each other, are connected to each other so that they can move up and down. 11a and is partitioned by a guide plate 19, and connected to each other in a sliding structure so as to be movable up and down. Therefore, the range in which the second outer cutter 11b can be moved up and down by the guide plate 19 is regulated within an appropriate range for shaving.

In the examples shown in FIGS. 11A, 11B, 12A, and 12B, the number of inner blades 12 allocated to the first oscillator 7 is 4, and the number of inner blades 12 allocated to the second oscillator 8 is 2. In addition, this configuration maintains a balance between the driving forces that drive the first oscillator 7 and the second oscillator 8.

That is, the arm portion 7d of the first oscillator 7 has one of the second inner cutters 12b attached on or near the first center line P1 in the vertical direction of the first oscillator 7. In addition, one of the second inner cutters 12b is attached to the arm portion 8d of the second oscillator 8 on or near the second center line P2 in the vertical direction of the second oscillator 8. This is the configuration that is used. According to this configuration, one of the second inner cutters 12b, which has a larger load when reciprocating while making sliding contact than the first inner cutter 12a, is located on the first center line P1 or at the first center in the vertical direction. One of the second inner cutters 12b is attached on the second center line P2 or closer to the second center line P2 in the vertical direction, so that the first oscillator 7 and the second inner cutter 12b are attached closer to the line P1. The balance between the driving forces driving the two oscillators 8 can be easily maintained.

As shown in FIGS. 11A and 12A, the arm portion 7d of the first oscillator 7 includes a first arm 17a, a second arm 17b, and a third arm 17c arranged at equal intervals directly above the arm support portion 17e. At the same time, the fourth arm 17d is arranged directly above the arm support part 17e at a larger interval than the interval between the second arm 17b and the third arm 17c or at an interval equal to the interval between the second arm 17b and the third arm 17c. The arm mounting portion 17f is disposed directly below the arm support portion 17e, the arm mounting portion 17f is erected and fixed on the movable base 7a, and the arm mounting portion 17f of the first oscillator 7 and the second arm 17b to which the second inner cutter 12b is attached are arranged at positions that overlap in plan view. Furthermore, as shown in FIGS. 11B and 12B, the arm portion 8d of the second oscillator 8 has the second arm 18b and the third arm 18c spaced at the same distance as the distance between the second arm 17b and the third arm 17c. The arm mounting portion 18f is arranged directly above the arm support portion 18e, and the arm mounting portion 18f is vertically fixed to the movable base 8a, and , the arm attachment portion 18f of the second oscillator 8 and the second arm 18b to which the second inner cutter 12b is attached are arranged at overlapping positions in a plan view. This makes it easy to maintain a balance between the driving forces that drive the first oscillator 7 and the second oscillator 8.

In the examples shown in FIGS. 13A, 13B, 14A, and 14B, the number of inner blades 12 allocated to the first oscillator 7 is 2, and the number of inner blades 12 allocated to the second oscillator 8 is 4. This configuration maintains a balance between the driving forces that drive the first oscillator 7 and the second oscillator 8 when this happens.

That is, the arm portion 7d of the first oscillator 7 has one of the second inner cutters 12b attached on or near the first center line P1 in the vertical direction of the first oscillator 7. In addition, one of the second inner cutters 12b is attached to the arm portion 8d of the second oscillator 8 on or near the second center line P2 in the vertical direction of the second oscillator 8. This is the configuration that is used. According to this configuration, one of the second inner cutters 12b, which has a larger load when reciprocating while making sliding contact than the first inner cutter 12a, is located on the first center line P1 or at the first center in the vertical direction. One of the second inner cutters 12b is attached on the second center line P2 or closer to the second center line P2 in the vertical direction, so that the first oscillator 7 and the second inner cutter 12b are attached closer to the line P1. The balance between the driving forces driving the two oscillators 8 can be easily maintained.

As shown in FIGS. 13B and 14B, the arm portion 8d of the second oscillator 8 has a first arm 18a, a second arm 18b, and a third arm 18c arranged at equal intervals directly above the arm support portion 18e. At the same time, the fifth arm 18g is arranged directly above the arm support portion 18e at a distance greater than the distance between the first arm 18a and the second arm 18b or at the same distance as the distance between the first arm 18a and the second arm 18b. The arm mounting portion 18f is disposed directly below the arm support portion 17e, the arm mounting portion 18f is erected and fixed on the movable base 8a, and the arm mounting portion 18f of the second oscillator 8 and the second arm 18b, to which the second inner cutter 12b is attached, are arranged at overlapping positions in a plan view. Furthermore, as shown in FIGS. 13A and 14A, the arm portion 7d of the first oscillator 7 has the first arm 17a and the second arm 17b at the same interval as the interval between the second arm 18b and the third arm 18c. The arm mounting part 17f is arranged directly above the arm support part 17e, the arm mounting part 18f is fixed to the movable table 8a, and , the arm attachment portion 17f of the first oscillator 7 and the second arm 17b to which the second inner cutter 12b is attached are arranged at overlapping positions in a plan view. This makes it easy to maintain a balance between the driving forces that drive the first oscillator 7 and the second oscillator 8.

According to the above-described reciprocating electric shaver 1 of the present embodiment, the size of the head portion 2a can be reduced, the degree of freedom in combination of the outer cutters 11 can be increased, and the number of outer cutters 11 can be increased compared to conventional products. Even if the first oscillator 7 and the second oscillator 8 move back and forth smoothly, it is possible to configure the structure.

In the above-described embodiment, an example in which six outer blades 11 are disposed on the head portion 2a of the main body 2 has been described, but the invention is not limited to this example. The number of outer cutters 11 may be seven or eight, and the number of outer cutters 11 may be four or five to make the head portion smaller. The specifications of the above-mentioned reciprocating electric shaver 1 may be changed as appropriate depending on specifications and the like.

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the scope of the present invention.

1 Reciprocating electric shaver 2 Main body, 2a Head part 3 Blade frame 4 Outer blade holding frame 5 Motor, 5a Drive shaft 6 Crank part 7 First oscillator (oscillator), 7a Movable base, 7b Support part, 7c Mounting part, 7d Arm part, 7e elongated hole, 7f reinforcing part 8 second oscillator (oscillator), 8a movable base, 8b support part, 8c mounting part, 8d arm part, 8e elongated hole 9 shaft-like member 10a cut blade, 10b trimmer blade 11 outer blade , 11a first outer cutter, 11b second outer cutter, 11c slit, 11d convex portion 12 inner cutter, 12a first inner cutter, 12b second inner cutter, 12j coil spring 13 crease blade 14a first window portion, 14b second window Part, 14c Third window part, 14d Fourth window part, 14e Fifth window part, 14f Sixth window part, 14g Through hole 17a First arm, 17b Second arm, 17c Third arm, 17e Arm support part, 17f Arm attachment part 18a First arm, 18b Second arm, 18c Third arm, 18d Fourth arm, 18e Arm support part, 18f Arm attachment part, 18g Fifth arm 19 Guide plate 21 Power switch 22 Power supply part 23 Control part 24 Holding plate 25 Slide switch P1 First center line P2 Second center line

Claims (2)

A reciprocating electric shaver comprising an outer cutter and an inner cutter that reciprocates from side to side while slidingly contacting the inner surface of the outer cutter,
The outer cutter includes a plurality of first outer cutters and a plurality of second outer cutters having a shape different from the first outer cutter,
The inner cutter includes a first inner cutter corresponding to the first outer cutter and a second inner cutter corresponding to the second outer cutter,
The first outer cutter and the first inner cutter constitute a cut blade, and the second outer cutter and the second inner cutter constitute a trimmer blade,
A reciprocating electric shaver characterized in that six of the cut blade, the trimmer blade, the cut blade, the cut blade, the trimmer blade, and the cut blade are arranged in the order of description. The cut blade and the trimmer blade are provided so as to be movable up and down,
Among the six cut blades, the trimmer blade, the cut blade, the cut blade, the trimmer blade, and the cut blade arranged in the order of description, the trimmer is arranged second in line compared to the cut blade arranged first. The amount of elevation of the blade is set to be small, and the amount of elevation of the trimmer blade that is placed fifth in line is set to be smaller than the amount of elevation of the trimmer blade that is placed fifth in line compared to the cut blade that is placed sixth in line. The reciprocating electric shaver according to claim 1.

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