AU4590602A - Hairdressing scissor assembly having detachable dovetail connection - Google Patents

Description

Regulation 3.2

AUSTRALIA

PATENTS ACT 1990 COMPLETE SPECIFICATION FOR A STANDARD PATENT

ORIGINAL

Name of Applicant: Wen-Ya Yeh Actual Inventors: Wen-Ya Yeh Address for Service: MADDERNS, 1st Floor, 64 Hindmarsh Square, Adelaide, South Australia, Australia Invention title: HAIRDRESSING SCISSOR ASSEMBLY HAVING DETACHABLE DOVETAIL CONNECTION The following statement is a full description of this invention, including the best method of performing it known to me.

I PatAU132 1 Hairdressing Scissor Assembly Having Detachable Dovetail Connection 2 Background of the Invention 3 1. Field of the Invention 4 The present invention relates to a hairdressing scissor assembly comprising plural pairs of scissors that are detachably engaged together by 6 detachable dovetail connection to proceed with special haircutting.

7 2. Description of the Related Art 8 A hairstylist cuts a customer's hair with several techniques, including 9 trimming, thinning, layering, etc. Sometimes the hairstylist has to hold plural pairs of scissors in the same hand for proceeding with the thinning or layering 11 of the hair to obtain the desired special hairstyle.

12 During operation of the plural pairs of scissors in the same hand, the user 13 must keep the plural pairs of scissors be spaced at regular intervals and operate 14 them with the same operating condition. The plural pairs of scissors must open and close synchronously to obtain a tidy, beautiful hairstyle. However, the 16 plural pairs of scissors are simply held by the index finger and the thumb of 17 the user such that the plural pairs of scissors cannot be operated synchronously 18 due to touchy control of the plural pairs of scissors by the fingers. Thus, the 19 plural pairs of scissors often become skew to one another and the spacing therebetween may be different from one another. The haircutting result is 21 adversely affected, and this problem is aggravated if the user is inexperienced.

22 The user often feels pain when operating the plural pairs of scissors in addition 23 to numerous limitations to and difficulties in operation.

24 U.S. Patent No. 6,192,590 to Applicant issued on Feb. 27, 2001 and Applicant's U.S. Patent Application No. 09/617,713 disclose hairdressing 26 scissor assemblies to solve the above-mentioned problems. However, 27 formation of the L-shaped engaging member and the L-shaped slot of the 1 connecting block for connecting the plural pairs of scissors is troublesome and 2 costly.

3 Summary of the Invention 4 An object of the present invention is to provide a hairdressing scissor assembly comprising plural pairs of scissors that are detachably engaged 6 together by detachable dovetail connection to proceed with special haircutting.

7 A hairdressing scissor assembly in accordance with the present invention 8 comprises plural pairs of hairdressing scissors. Each pair of hairdressing 9 scissors comprises two cutting members pivotally connected together. Each cutting member comprises a handle at a first end thereof and a blade at a 11 second end thereof. A through-hole is defined in at least one of the handles. A 12 connecting block is securely mounted in the through-hole and comprises a 13 dovetail groove in a first side thereof and a dovetail block in a second side 14 thereof. The dovetail block of the connecting block of one pair of hairdressing scissors is releasably engaged with the dovetail groove of the connecting block 16 of another pair of hairdressing scissors.

17 Other objects, advantages, and novel features of the invention will become 18 more apparent from the following detailed description when taken in 19 conjunction with the accompanying drawings.

Brief Description of the Drawings 21 Fig. 1 is an exploded perspective view of a first embodiment of a 22 hairdressing scissor assembly in accordance with the present invention.

23 Fig. 2 is a perspective view of two connecting blocks respectively of two 24 pairs of hairdressing scissors in Fig. 1.

Fig. 3 is a side view, partly sectioned, illustrating the assembly procedure 26 of the first embodiment of the hairdressing scissor assembly in Fig. 1.

1 Fig. 4 is a side view similar to Fig. 3, wherein the tips of the scissors are 2 aligned along a straight line and located at the same level.

3 Fig. 5 is a view similar to Fig. 3, wherein the tips of scissors are aligned 4 along an inclined line and located at different levels.

Fig. 6 is an exploded perspective view of a second embodiment of the 6 hairdressing scissor assembly in accordance with the present invention.

7 Fig. 7 is a perspective view of two connecting blocks respectively of two 8 pairs of hairdressing scissors in Fig. 6.

9 Fig. 8 is a bottom view of the connecting block in Fig. 7.

Fig. 9 is a side view, partly sectioned, illustrating the assembly procedure 11 of the hairdressing scissor assembly in Fig. 6.

12 Fig. 10 is a side view similar to Fig. 9, wherein the tips of scissors are 13 aligned along a straight line and located at the same level.

14 Fig. 11 is an exploded perspective view of a third embodiment of the hairdressing scissor assembly in accordance with the present invention.

16 Fig. 12 is a perspective view of two connecting blocks respectively of two 17 pairs of hairdressing scissors in Fig. 11.

18 Fig. 13 is a side view, partly sectioned, illustrating the assembly procedure 19 of the hairdressing scissor assembly in Fig. 11.

Fig. 14 is a side view similar to Fig. 13, wherein the tips of scissors are 21 aligned along an inclined line and located at different levels.

22 Detailed Description of the Preferred Embodiments 23 Referring to Fig. 1, a first embodiment of a hairdressing scissor assembly 24 in accordance with the present invention generally comprises plural pairs of scissors 1 each having first and second cutting members that are pivoted 26 together by a pivot 30. The first cutting member comprises a first handle 11 on 27 an end thereof and a first blade 10 on the other end thereof. The second cutting 1 member comprises a second handle 21 on an end thereof and a second blade 2 20 on the other end thereof. Each blade 10, 20 has a tip 16, 26. The first and 3 second cutting members are pivoted together at intermediate portions thereof.

4 Of course, each handle 11, 21 has an opening (not labeled) for the thumb or index finger of the user.

6 At least one of the first handle 11 and the second handle 21 has a 7 through-hole 12 defined therein and extending from a first side 1 a, 21 a to a 8 second side 11 b, 21b opposite to the first side 11 a, 21a. At least one 9 connecting block 40 is securely mounted in the through-hole 12 to allow engagement of two pairs of scissors 1. In this embodiment, each of the first 11 handle 11 and the second handle 12 has a through-hole 12 defined therein for 12 receiving a respective connecting block 13 Referring to Fig. 2, each connecting block 40 comprises a dovetail 14 groove 41 in a first side thereof and two dovetail blocks 43 and 45 formed on a second side thereof opposite to the first side. In addition, two spaced 16 transverse grooves 42 are defined in the first side of each connecting block 17 and intersect with the dovetail groove 41, thereby dividing the dovetail groove 18 41 into a first engaging section 41a, a first insertion section 41b, a second 19 engaging section 41c, a second insertion section 41d, and a third engaging section 41e in sequence. When each connecting block 40 is mounted in the 21 respective through-hole 12, the dovetail blocks 43 and 45 protrude beyond the 22 second side 1 b, 21 b of the respective handle 11, 21 while the first side of the 23 connecting block 40 is flush with the first side 11la, 21a of the respective 24 handle 11, 21, best shown in Fig. 1.

When engaging one pair of scissors 1 with another pair of scissors 1, the 26 dovetail blocks 43 and 45 of each connecting block 40 of one pair of scissors 1 27 are respectively inserted into the insertion grooves 41b and 41d of the 1 respective connecting block 40 of another pair of scissors 1, as shown in Fig. 3.

2 Then, the right one of two adjacent pairs of scissors 1 may be moved upward 3 relative to the left one of the two adjacent pairs of scissors 1 until the dovetail 4 blocks 43 and 45 of each connecting block 40 of the right one of the two adjacent pairs of scissors 1 are engaged with and thus retained in the first and 6 second engaging sections 41a and 41c of the respective connecting block 40 of 7 the left one of the two adjacent pairs of scissors 1, thereby forming a 8 hairdressing scissor assembly shown in Fig. 4, in which the tips 16 and 26 of 9 the hairdressing scissors 1 are aligned along a straight line and located at the same level. Alternatively, the right one of two adjacent pairs of scissors 1 may 11 be moved downward relative to the left one of the two adjacent pairs of 12 scissors 1 until the dovetail blocks 43 and 45 of each connecting block 40 of 13 the right one of the two adjacent pairs of scissors 1 are engaged with and thus 14 retained in the second and third second engaging sections 41c and 41e of the respective connecting block 40 of the left one of the two adjacent pairs of 16 scissors 1, thereby forming a hairdressing scissor assembly shown in Fig. 5, in 17 which the tips 16 and 26 of the hairdressing scissors 1 are aligned along an 18 inclined line and located at different levels.

19 Fig. 6 illustrates a second embodiment of the hairdressing scissor assembly which differs from the first embodiment in the connecting block. In 21 this embodiment, as illustrated in Fig. 7, each connecting block (now 22 designated by 50) comprises a dovetail groove 51 in a first side thereof and a 23 dovetail block 53 formed on an upper end of a second side thereof opposite to 24 the first side. The dovetail groove 51 comprises a dovetail engaging section and an insertion section 52 located below the dovetail engaging section 55 and 26 having a width the same as the maximum width of the dovetail engaging 27 section 55, as shown in Fig. 8.

1 When engaging one pair of scissors 1 with another pair of scissors 1, the 2 dovetail block 53 of each connecting block 50 of one pair of scissors 1 is 3 inserted into the insertion groove 52 of the respective connecting block 50 of 4 another pair of scissors 1, as shown in Fig. 9. Then, the right one of two adjacent pairs of scissors 1 may be moved upward relative to the left one of the 6 two adjacent pairs of scissors 1 until the dovetail block 53 of each connecting 7 block 50 of the right one of the two adjacent pairs of scissors 1 are engaged 8 with and thus retained in the dovetail engaging section 55 of the respective 9 connecting block 50 of the left one of the two adjacent pairs of scissors 1, thereby forming a hairdressing scissor assembly shown in Fig. 10, in which the 11 tips 16 and 26 of the hairdressing scissors I are aligned along a straight line 12 and located at the same level.

13 Fig. 11 illustrates a third embodiment of the hairdressing scissor 14 assembly which differs from the second embodiment in the connecting block.

In this embodiment, as illustrated in Fig. 12, each connecting block (now 16 designated by 60) comprises a dovetail groove 61 in a first side thereof and a 17 dovetail block 63 formed on a lower end of a second side thereof opposite to 18 the first side. The dovetail groove 61 comprises a dovetail engaging section 19 and an insertion section 62 located above the dovetail engaging section 62 and having a width the same as the maximum width of the dovetail engaging 21 section 22 When engaging one pair of scissors 1 with another pair of scissors 1, the 23 dovetail block 63 of each connecting block 60 of one pair of scissors 1 is 24 inserted into the insertion groove 62 of the respective connecting block 60 of another pair of scissors 1, as shown in Fig. 13. Then, the right one of two 26 adjacent pairs of scissors 1 may be moved upward relative to the left one of the 27 two adjacent pairs of scissors 1 until the dovetail block 63 of each connecting 1 block 60 of the right one of the two adjacent pairs of scissors 1 are engaged 2 with and thus retained in the dovetail engaging section 65 of the respective 3 connecting block 60 of the left one of the two adjacent pairs of scissors 1, 4 thereby forming a hairdressing scissor assembly shown in Fig. 14, in which the tips 16 and 26 of the hairdressing scissors 1 are aligned along an inclined line 6 and located at different levels.

7 According to the above description, it is appreciated that the hairdressing 8 scissors 1 in accordance with the present invention can be releasably engaged 9 with one another to form a hairdressing scissor assembly with the tips of the scissors located at the same level or different levels to proceed with different 11 haircutting functions.

12 Although the invention has been explained in relation to its preferred 13 embodiment, it is to be understood that many other possible modifications and 14 variations can be made without departing from the scope of the invention as hereinafter claimed.

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