JP2007044300A - Attachment for electric razor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the breakdown or the deformation of the parts which constitute a locking mechanism section when the large load or a strong impact is applied to an attachment during the use of the attachment. <P>SOLUTION: The attachment for an electric razor 9 is so constituted that the locking mechanism section 3 to temporarily hold a sliding comb section 2 at an arbitrary sliding position to a fixing section 1 is equipped with a locking button 5 disposed on the sliding comb section 2 and engagement sections 6 which are disposed in the fixing section 1, are engaged with the locking button 5 and are for holding the sliding comb section 2 temporarily so that the cutting height of a comb blade 4 is not changed, wherein a plurality of engagement sections 6 are provided in a direction almost parallel to a sliding direction A of the sliding comb section 2 with intervals, the locking button 5 can be engaged with one of the engagement sections 6 and the engagement surface 7 between the locking button 5 and the engagement sections 6 is inclined to a locking direction C of the sliding comb section 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an attachment for an electric razor for adjusting the cutting height.

  Conventionally, when hair is cut, the skill of the practitioner is necessary to use only an electric razor to align the length of the finish. Therefore, in order to cut the hair of the user's head to a uniform length, the scalp is provided with comb teeth for adjusting the cutting height, and the comb teeth are temporarily held at any position slid in the blade edge direction. There is known an attachment for an electric shaver.

  However, when the holding power of the comb teeth is weak, there is a problem that the comb teeth are carelessly slid when a strong load is applied to the attachment during use.

In order to solve this problem, for example, Patent Document 1 is known as an attachment for an electric shaver provided with a lock mechanism for increasing the holding force of comb teeth. In this conventional example, by moving the slide button up and down, the comb portion moves up and down along the groove portion provided in a staircase shape, and at this time, the movement of the comb portion is prevented when the gradient of the groove portion disappears. The comb teeth can be prevented from moving and the cutting height fluctuating during use. However, in this conventional example, since the holding strength of the comb portion with respect to the electric razor body is strong, if the comb portion is forcibly pushed in or the electric razor is dropped, a heavy load or a strong impact at the time of use, etc. When this occurs, there is a risk that the parts constituting the means for temporarily holding the comb portion at an arbitrary slide position may be broken or deformed.
Japanese National Patent Publication No. 11-513579

  The present invention has been invented in view of the above-described conventional problems, and can prevent the components constituting the lock mechanism portion from being broken or deformed when a heavy load or a strong impact is applied to the attachment when the attachment is used. It is an object to provide an attachment for an electric razor, and an object to provide an attachment for an electric razor that can be reliably prevented from being disassembled by dropping or excessive pulling operation. .

  In order to solve the above-mentioned problems, the present invention includes a fixing portion 1 attached to the electric razor main body 8, a slide comb portion 2 having comb teeth 4 for adjusting the cutting height that slides in the direction of the blade edge of the electric razor main body 8, In an electric razor attachment including a lock mechanism portion 3 for temporarily holding the slide comb portion 2 at an arbitrary slide position with respect to the fixed portion 1, the lock mechanism portion 3 includes a lock button 5 provided on the slide comb portion 2. And an engaging portion 6 for temporarily holding the slide comb portion 2 so as to be engaged with the lock button 5 and not to change the cutting height of the comb teeth 4 provided on the fixing portion 1. 6 is provided with a space in a direction substantially parallel to the slide direction A of the slide comb portion 2, the lock button 5 can be engaged with any one of the engagement portions 6, and the lock button 5 and the engagement portion 6 and It is characterized by comprising an inclined engagement surface 7 relative to the slide comb second locking direction C.

  With this configuration, the engagement surface 7 between the lock button 5 and the engagement portion 6 has a gradient θ (tapered shape) with respect to the force in the lock direction C, and the load applied in the lock direction C Is held in a locked state when it is below a certain level, for example, when the force in the locking direction C exceeds a certain level, such as when the slide comb portion 2 is forcibly pushed in or the electric razor is dropped, the lock button 5 The force that slides in the taper direction is released and the lock is released, so that the components constituting the lock mechanism portion 3 can be prevented from being broken or deformed.

  Further, an assembly means 10 for assembling the slide comb portion 2 slidably with respect to the fixed portion 1 is provided. The assembly means 10 is provided on the pair of left and right hooks 11 provided on the slide comb portion 2 and the fixed portion 1 described above. The hook 11 includes a pair of left and right engaging grooves 12 that are slidably inserted and locked, and the left and right engaging grooves 12 are arranged so that the cutting height of the slide comb part 2 can be adjusted in at least three stages. 2 is formed long in a direction substantially parallel to the sliding direction A, and the left and right hooks 11 are widened only at an intermediate position P3 excluding both end positions P1, P2 in the length direction of the left and right locking grooves 12 to lock the left and right. It is preferable that the groove 12 can be inserted and locked. In this case, the attachment 9 can be assembled or disassembled only at the intermediate position P3 of the locking groove 12. To become. On the other hand, if an excessive pulling or peeling force is applied to the slide comb portion 2 or an excessive pushing force is applied to the slide comb portion 2 when the attachment 9 is used, the slide comb portion 2 is moved to either of the end positions P1 and P2 of the locking groove 12. The hook 11 moves with great force, and the hook 11 tends to come off from the locking groove 12 with that momentum. However, the hook 11 cannot be spread at both end positions P1 and P2 of the locking groove 12, so that it does not come off from the locking groove 12. Therefore, it is possible to prevent the attachment 9 from being inadvertently disassembled due to dropping or excessive pulling operation.

  In the present invention, the engagement surface between the lock button and the engagement portion is inclined with respect to the lock direction of the slide comb portion, so that when the load applied in the lock direction is below a certain level, the lock button is held in a locked state. When a heavy load or strong impact is applied to the lock button, the lock button is slid in the taper direction and the lock is released, so that the parts that make up the lock mechanism can be prevented from being damaged or deformed. An attachment for an electric shaver that does not break or break can be provided.

  Furthermore, the attachment can be assembled or disassembled only at an intermediate position of the locking groove, and an electric razor attachment that can reliably prevent disassembly at both ends of the locking groove can be provided.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  As shown in FIGS. 9 to 11, a blade block 13 for removing body hair is provided at the tip of the electric razor body 8. The blade block 13 of this example includes a pair of front and rear net blades 14 that are driven to reciprocate, and a pair of front and rear trimmer blades 15 that are disposed on both outer sides of the net blade 14. A trimmer operation button 17 for raising and lowering one trimmer blade 15 is provided on the front portion of the outer cassette 16 that holds the blade block 13, and the outer cassette 16 is attached to the electric razor main body 8 on both sides of the outer cassette 16. An attaching / detaching button 18 for attaching / detaching is provided. Reference numeral 19 in FIG. 11 denotes an operation button for swinging which enables the entire blade block 13 to swing left and right.

  An attachment 9 for adjusting the cutting height is detachably attached to the outer cassette 16. The attachment 9 is connected to the outer cassette 16 and fixed thereto, the slide comb portion 2 provided with comb teeth 4 that slide in the direction of the blade edge of the electric razor main body 8, and the slide comb portion 2 slidably connected to the fixed portion 1. Assembly means 10 (FIGS. 5 and 6), and a lock mechanism portion 3 (FIGS. 1 and 2) for temporarily holding the slide comb portion 2 at an arbitrary slide position with respect to the fixed portion 1.

  The fixing portion 1 of the attachment 9 is formed in a substantially rectangular tube shape, and the front portion 1a of the fixing portion 1 is attached to the outer cassette 16 as shown in FIGS. Are arranged between the operation button 19 and the swinging operation button 19, both side surface parts 1 b of the fixing part 1 are arranged on the upper part of the attaching / detaching button 18, and the rear part 1 c of the fixing part 1 is arranged on the rear surface of the outer cassette 16. As a means for fixing the fixing portion 1 to the outer cassette 16, a method of press-fitting the fixing portion 1 into the outer cassette 16 or a plurality of small protrusions (not shown) projectingly provided on the outer surface of the outer cassette 16 and fixing. A fitting method in which a fitting recess (not shown) in which a small protrusion is fitted to the inner surface of the portion 1 may be provided, and the design can be changed as appropriate.

  As shown in FIG. 3, the slide comb portion 2 of the attachment 9 has a substantially comb-shaped portion 2a having a comb tooth 4 at the tip and a holding portion 2b bent in a substantially L shape from the comb-tooth portion 2a. The holding portion 2 b is assembled to the front surface portion 1 a of the fixed portion 1 by the assembling means 10.

  In this example, a stepped portion 1d that is one step lower is formed on the front surface portion 1a of the fixed portion 1, and a holding portion 2b of the slide comb portion 2 is slidably fitted into the stepped portion 1d. Here, the outlines of the holding portion 2b and the stepped-down portion 1d are bent in a substantially U shape, and when the slide comb portion 2 is at the lowest position P2 (the state shown in FIG. 7A), the holding portion 2b. The stepped portion 1d is closely fitted, and in this state, the tip portion 5a of the lock button 5 comes into contact with and holds the lowermost stopper 40 (FIG. 1). On the other hand, when the slide comb portion 2 is at the uppermost position P1 (the state shown in FIG. 8A), the gap J between the holding portion 2b and the stepped-down portion 1d is small. Even if a force is applied in the direction indicated by, the rattling of the comb teeth 4 can be suppressed to, for example, 0.5 mm or less.

  Next, the assembly means 10 will be described. As shown in FIGS. 4 to 6, the assembling means 10 includes a pair of left and right hooks 11 protruding from the inner surface of the holding portion 2 b of the slide comb portion 2, and a pair of left and right latches drilled in the front surface portion 1 a of the fixing portion 1. It consists of a groove 12. In this example, the left and right hooks 11 are each composed of a ribbed upper claw piece 11a and a lower claw piece 11b.

  As shown in FIG. 4A, the pair of left and right locking grooves 12 are elongated in a direction substantially parallel to the sliding direction A of the slide comb portion 2, and the cutting height of the slide comb portion 2 is at least three levels. It has a length that can be adjusted. Further, as shown in FIGS. 4 (a), 5 and 6, the left and right locking grooves 12 are narrow so that the left and right hooks 11 cannot be inserted and locked at both end positions P1 and P2 in the length direction. On the other hand, the groove width is wide at the intermediate position P3 of the locking groove 12 so that the left and right hooks 11 can be inserted and locked.

  Thus, when the slide comb portion 2 is assembled to the fixed portion 1, the left and right hooks 11 (upper claw pieces 11a and lower claw pieces 11b) of the slide comb portion 2 are positioned at an intermediate position P3 of the locking groove 12 shown in FIG. Insert from. At this time, since the groove width is wide at the intermediate position P3 of the locking groove 12, the left and right hooks 11 are respectively hooked and locked in the left and right locking grooves 12 while being spread outward in the direction indicated by the arrow M. (State of FIG. 5C). That is, the attachment 9 can be assembled or disassembled only at the intermediate position P3 of the locking groove 12. Thereafter, when the slide comb portion 2 is slid up and down, the left and right hooks 11 can freely slide from the intermediate position P3 of the locking groove 12 to the lowermost position P2 or the uppermost position P1 (position of FIG. 5B). The cutting height can be adjusted. Further, in this example, the left and right hooks 11 are respectively composed of the upper claw piece 11a and the lower claw piece 11b, so that the engagement force of the hook 11 with respect to the locking groove 12 is enhanced, which is effective in preventing the slide comb portion 2 from wobbling. Become.

  By the way, when the attachment 9 is used, if an excessive pulling or peeling force (in the direction of arrow G or H in FIG. 8B) acts on the slide comb portion 2, the slide comb portion 2 vigorously moves to the uppermost position P1. To rise. Furthermore, when an unreasonable pushing force (in the direction of arrow F in FIG. 8A) acts due to dropping or the like, the slide comb portion 2 descends vigorously to the lowest position P2. In either case, the hook 11 (upper claw piece 11a, lower claw piece 11b) tends to come off the locking groove 12 with the momentum moved to the uppermost position P1 or the lowermost position P2. In the present invention, FIG. As shown in FIG. 6B, the groove widths of the uppermost position P1 and the lowermost position P2 of the locking groove 12 are narrowed, and the lower claw piece 11b and the upper claw piece 11a are engaged at the lowest position P2 in FIG. The lower claw piece 11b and the rib 11c of the upper claw piece 11a are prevented from coming off the locking groove 12 at the uppermost position P1 in FIG. It is possible to prevent the attachment 9 from being inadvertently disassembled by a pulling operation or the like.

  Next, the lock mechanism unit 3 for holding the slide comb unit 2 so that the height does not change during use at each cutting height will be described. As shown in FIGS. 1 and 2, the lock mechanism portion 3 includes a lock button 5 provided on the holding portion 2 b of the slide comb portion 2, and a laterally trapezoidal engagement portion protruding from the front surface portion 1 a of the fixing portion 1. 6 and the lowermost stopper 40.

  In the upper end of the lock button 5 of this example, an operation portion 5c protruding from a hole provided in the holding portion 2b of the slide comb portion 2 is provided, and a distal end portion 5a engaged with the engaging portion 6 is provided at the lower end portion. A shaft portion 5b is provided between the operation portion 5c and the tip portion 5a. The shaft portion 5b is slidably brought into contact with the inner surface of the fixed portion 1. The lock button 5 is always given a force for pressing the tip portion 5a against the fixed portion 1 side by a spring body (not shown).

  On the other hand, as shown in FIG. 4A, the upper and lower two lateral trapezoidal engaging portions 6 protrude on the inner surface of the fixed portion 1 at intervals in a direction substantially parallel to the sliding direction A of the sliding comb portion 2. The tip portion 5a of the lock button 5 can be engaged with any one of the engaging portions 6, and the slide comb portion 2 can be engaged with the lowermost stopper 40 in a state where the slide comb portion 2 is moved down most. Thereby, the cutting height of the slide comb part 2 can be adjusted in at least three stages. In the example of FIG. 4A, the upper and lower two engaging portions 6 are provided in two rows on the left and right sides, and the tip portion 5a of the lock button 5 can be engaged so as to straddle the engaging portions 6 in each row. ing. In addition, as an example of the cutting height, there are illustrated three stages of the 3 mm position shown in FIG. 7A, the 6 mm position shown by S1 in FIG. 7B, and the 9 mm position shown by S2 in FIG. 8A. Of course, it is not limited to these numerical values.

  Therefore, when adjusting the cutting height of the attachment 9, when the operation portion 5c of the lock button 5 is pushed in with a finger, the tip portion 5a is deformed in the direction of the arrow N in FIG. The engagement with the joint portion 6 is released, and the cutting height can be freely adjusted by sliding the slide comb portion 2 up and down in this state. When the finger is released from the lock button 5 at an arbitrary cutting height, the distal end portion 5a of the lock button 5 is restored to the original state by the spring force and engages with another engagement portion 6.

  Furthermore, in the present invention, as shown in FIG. 2, the engagement surface 7 between the tip portion 5 a of the lock button 5 and the engagement portion 6 has a gradient θ with respect to the lock direction C of the slide comb portion 2. . In FIG. 2, the locking direction C is downward, and the engaging surface 7 has a tapered shape that protrudes forward as it goes downward. As a result, when the force in the locking direction C becomes equal to or greater than a certain level, a force that causes the distal end portion 5a of the lock button 5 to slide in the taper direction C1 works to prevent the components constituting the locking mechanism unit 3 from being broken or deformed. become. In other words, the holding strength of the slide comb portion 2 with respect to the fixed portion 1 is held in a locked state when the load applied in the lock direction C is below a certain level. For example, the slide comb portion 2 is forcibly pushed in or the electric razor is dropped. When a large load of a certain level or a strong impact is applied in the locking direction C as in the case, the lock portion is released by the tip portion 5a of the lock button 5 sliding on the inclined engaging surface 7 of the engaging portion 6. It will be in the state. Thus, by weakening the holding strength of the slide comb portion 2 with respect to the fixed portion 1, it becomes possible to prevent the parts constituting the lock mechanism portion 3 from being broken or deformed, resulting in breakage or breakage. An attachment 9 that does not occur can be provided.

  Further, in this example, since the engaging portion 6 to which the lock button 5 is engaged is arranged using the empty space at the center of the left and right engaging grooves 12 to which the left and right hooks 11 are engaged, There is also an advantage that the assembling means 10 and the lock mechanism portion 3 can be efficiently concentrated and installed in a narrow space, and the attachment 9 can be made compact.

  By the way, when the slide comb portion 2 and the fixed portion 1 are slidably combined, the shavings cut by the net blade 14 and the trimmer blade 15 of the electric razor body 8 are fixed from the arrow U direction in FIG. And the slide comb portion 2 enters into the gap and is left in the gap, and the fuzz is adhering to the periphery of the lock button 5, particularly the gap between the front end portion 5 a of the lock button 5 and the engaging portion 6. If this happens, the lock button 5 slips and cannot be locked. Therefore, in this example, as shown in FIG. 1, a rib-shaped dust-proof wall 30 is projected from the upper edge portion of the front surface portion 1a of the fixed portion 1 in the entire width direction so as to slide on the inner surface of the holding portion 2b of the slide comb portion 2. Touched. Thereby, it is possible to prevent the dust from entering the gap between the slide comb portion 2 and the fixed portion 1 with the dust-proof wall 30 and to reliably prevent the holding strength from being reduced by the dust.

FIG. 9 is a vertical cross-sectional view showing a lock mechanism portion used for an attachment for cutting height adjustment according to an embodiment of the present invention, as viewed from line XX in FIG. It is an expanded sectional view of the B section of FIG. It is a perspective view of the attachment same as the above. The fixing part of the attachment same as the above is shown, (a) is a front view, (b) is a plan sectional view, (c) is a rear view, and (d) is a bottom view. (A) is a cross-sectional view of one half of the attachment of the above, (b) is an enlarged cross-sectional view illustrating a state in which the hook is engaged with the uppermost position and the lowermost position of the locking groove, and (c) is the locking groove. It is an expanded sectional view explaining the state which the hook engaged in the intermediate position. The positional relationship between the locking groove and the hook when adjusting the cutting height of the attachment is shown, (a) is an explanatory view of the positional relationship between the locking groove and the hook when in the uppermost position, (b) FIG. 7 is an explanatory view of the positional relationship between the locking groove and the hook when in the intermediate position, and (c) is an explanatory view of the positional relationship between the locking groove and the hook when in the lowest position. (A) is explanatory drawing in case the cutting height of a slide comb part same as the above is in a 3 mm position, (b) is explanatory drawing in case the cutting height is in a 6 mm position. (A) is explanatory drawing in case the cutting height of a slide comb part same as the above exists in a 9-mm position, (b) is explanatory drawing of the direction of the tensile load concerning a slide comb part same as the above, and the direction of a peeling load. It is a rear view of the electric razor which attached the attachment same as the above. It is a side view of the electric razor which attached the attachment same as the above. It is a front view of the electric shaver which attached the attachment same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fixed part 2 Slide comb part 3 Lock mechanism part 4 Comb tooth 5 Lock button 6 Engagement part 7 Engagement surface 10 Assembling means 11 Hook 12 Locking groove A Sliding direction C Locking direction P1, P2 Both end position of locking groove P3 Intermediate position of stop groove

Claims (2)

  Temporarily hold the sliding comb portion at an arbitrary sliding position with respect to the fixed portion mounted on the electric razor body, the slide comb portion having comb teeth for adjusting the cutting height that slides in the direction of the blade edge of the electric razor main body, and the fixed portion. In the attachment for the electric razor provided with the locking mechanism part for the above, the locking mechanism part is engaged with the locking button provided on the sliding comb part and the locking button provided on the fixing part, and the cutting height of the comb teeth is increased. An engagement portion for temporarily holding the slide comb portion so as not to change, and a plurality of the engagement portions are provided at intervals in a direction substantially parallel to the slide direction of the slide comb portion. And an engagement surface between the lock button and the engagement portion is inclined with respect to the locking direction of the slide comb portion. Attachment for Ri. Assembling means for slidably assembling the slide comb portion with respect to the fixed portion, the assembly means includes a pair of left and right hooks provided on the slide comb portion, and the hook provided on the fixed portion is slidably inserted and locked. The left and right locking grooves are formed in a direction substantially parallel to the sliding direction of the slide comb portion so that the cutting height of the slide comb portion can be adjusted in at least three stages. 2. The electric device according to claim 1, wherein the left and right hooks are widened only at an intermediate position excluding both end positions in the length direction of the left and right locking grooves so that the left and right locking grooves can be inserted and locked. Razor attachment.

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