CN100341076C

CN100341076C - Coaxial cable

Info

Publication number: CN100341076C
Application number: CNB2004100351377A
Authority: CN
Inventors: 下泽胜雄
Original assignee: JUN KINUNUI KOSO CO Ltd
Current assignee: JUN KINUNUI KOSO CO Ltd
Priority date: 2003-04-25
Filing date: 2004-04-23
Publication date: 2007-10-03
Anticipated expiration: 2024-04-23
Also published as: KR20040092384A; TW200428413A; JP2004327345A; KR101056649B1; JP4409202B2; CN1540683A; TWI279814B

Abstract

Provided is a very thin coaxial cable excellent in a noise-blocking shielding property which can be used in a small space like an antenna lead wire of a foldable portable telephone or an interface cable connecting a display and a main body of a notebook-sized computer, having sufficient flexibility even in case a switching operation is frequently made corresponding to using states of the foldable portable telephone or the notebook-sized computer. The coaxial cable is formed by covering a central conductor by an insulation body, and arranging a lateral winding shield layer around the insulation body, around which an outer cover is fitted. The shield layer is formed into a double lateral winding shield layer by forming a first lateral winding shield layer by winding an elemental wire made of a shield material around the insulation body, and forming a second lateral winding shield layer around the first lateral winding shield layer in the same direction as the winding direction of the elemental wire forming the first lateral winding shield layer, and an outer cover is arranged after compressing the first lateral winding shield layer and the second lateral winding shield layer.

Description

Coaxial cable

Technical field

The present invention relates to coaxial cable, particularly relate to the superfine superfine coaxial cable of the external diameter clamshell phone that frequently carries out on-off action, that use as the lead of antenna or bear with high frequency on-off action notebook computer, connect the superfine superfine coaxial cable of external diameter that interface cable between body and the display etc. uses.

Background technology

Traditional above-mentioned clamshell phone comprises: what have antenna and display part is subjected to words portion; And by signals such as voice signal or operation keys, transmission mail send words portion, by hinge portion with this be subjected to words portion with send words portion rotationally mechanical type combine.In this hinge portion, dispose the antenna that will be subjected to words portion and voice signal or with signal takes place accordingly in the operation of operation keys the signal that send words portion the stube cable that the electric property in loop is connected takes place, this stube cable has used and has been used to interdict the coaxial cable that external noise is used in the past.And, be provided in the distolateral of stube cable in the hinge portion, be fixedly arranged on the antenna that is subjected to words portion, another distolateral signal that is installed in takes place in the loop, this clamshell phone is in when work, and the antenna by being subjected to words portion can the loop take place from signal and send signal or accept signal from the outside.

In order to make this clamshell phone work, when frequently carrying out the on-off action of clamshell phone when using in use or not etc., be fixedly arranged on antenna and signal and stube cable between the loop takes place be subjected to bending or distortion in hinge portion etc.

At this moment, the external conductor layer of the coaxial cable that uses as stube cable, used the marshalling screen that around the insulator that coats center conductor, copper single cord marshalling is formed, perhaps with copper single cord horizontal around shape reel to form horizontal in screen, but promptly organize into groups in the coaxial cable of screen having the external conductor layer, although the shielding character of blocking noise is good, but bear when using in use or not in the clamshell phone of frequent on-off action, the coaxial cable that is fixedly arranged between antenna and signal generation loop is bent or twists, and there is the problem of pliability difference in its result.And, when forming the marshalling screen, also exist the problem of activity duration length and productivity aspect.

On the other hand, the external conductor layer of the coaxial cable that uses as stube cable, horizontal in the structure of screen in employing, carry out the occasion of on-off action continually at clamshell phone, although better than the structure of using the marshalling screen on the pliability this point, can not say so fully aspect the shielding character of blocking noise.

To this, in order further to improve the shielding character of blocking noise, setting the horizontal dual horizontal occasion of dual formation around screen around screen, generally be to make the coiling direction of the copper single cord of each layer differently be wound into cross mutually, plesiomorphism with the marshalling screen, though good from the viewpoint of the shielding character of blocking noise, exist pliability and inadequate problem.And, even in this occasion, form horizontally when screen, because of the coiling direction of copper single cord differently is wound into cross mutually, also exist the problem (for example, with reference to patent documentation 1) of long and productivity aspect of this activity duration.

In addition, for further improve the shielding character of blocking noise, also have consider to set dual horizontal more than screen for example, 3 heavy horizontal occasions around screen, but this occasion, the problem of existence are as superfine coaxial cable, can cause external diameter to increase, weight also increases, and impairs pliability.

[patent documentation 1]

Japanese patent laid-open 6-349345

For this reason, in view of above problem, the object of the invention is, provide following a kind of superfine coaxial cable promptly, be used for lead or the display of notebook computer and interface cable of body and so on of the antenna of clamshell phone, external diameter is thin, can be used for short space, even frequently carry out the occasion of on-off action with the use of clamshell phone or notebook computer the time or when not using, also have sufficient pliability, and have the shielding character of good blocking noise.

Summary of the invention

Above-mentioned purpose can realize by adopting superfine coaxial cable of the present invention.Promptly, say inductively, superfine coaxial cable of the present invention, be around center conductor, to be coated with insulator, around this insulator, be equipped with horizontal around screen, at this horizontal coaxial cable that around screen, is equipped with surrounding layer and is constituted, it is characterized in that, described horizontal be dual horizontal around screen around screen, its structure is the shielding material single cord of reeling around described insulator, form the 1st horizontal around screen, horizontal around screen the 1st again, with form the 1st horizontal on the identical direction of the shielding material single cord of screen coiling shielding material single cord, form the 2nd horizontally, these the 1st are horizontally horizontally being set surrounding layer around screen and the 2nd after the screen compression around screen.

Effect

Adopt superfine coaxial cable of the present invention, owing to be around center conductor, to be coated with insulator, set horizontal around this insulator around screen, at this horizontal coaxial cable that around screen, is equipped with surrounding layer and is constituted, described horizontal be dual horizontal around screen around screen, its structure is the shielding material single cord of reeling around described insulator, form the 1st horizontal around screen, horizontal around screen the 1st again, with form the 1st horizontal on the same direction of shielding material single cord of screen coiling shielding material single cord, form the 2nd horizontal around screen, these the 1st are horizontally horizontally being set surrounding layer around screen and the 2nd after screen compression, therefore, frequently carry out the stube cable of clamshell phone of on-off action or the desired bendabilities such as interface cable of notebook computer during use or when not using, the pliability aspect, and aspect shield effectiveness, can in desirable scope, fully be met.

Description of drawings

Fig. 1 is the approximate three-dimensional map of the most preferred embodiment of superfine coaxial cable of the present invention.

Fig. 2 is the profile of superfine coaxial cable shown in Figure 1.

Fig. 3 is the diagrammatic illustration figure of the clamshell phone of use superfine coaxial cable shown in Figure 1.

Fig. 4 is the key diagram of the Apparatus for Bending at low-temp of use during the resistance to bend(ing) of coaxial cable is tested.

Fig. 5 is superfine coaxial cable of the present invention and has traditional marshalling screen and horizontal in the figure of screen as the shield effectiveness of the coaxial cable of external conductor layer.

Fig. 6 has the profile of traditional marshalling screen as the coaxial cable of external conductor layer.

Embodiment

With reference to the accompanying drawings, the most preferred embodiment to superfine coaxial cable of the present invention describes.

Fig. 1 is the approximate three-dimensional map of the most preferred embodiment of superfine coaxial cable of the present invention, Fig. 2 is the profile of superfine coaxial cable shown in Figure 1, Fig. 3 is the diagrammatic illustration figure of the clamshell phone of use superfine coaxial cable shown in Figure 1, Fig. 4 is the key diagram of the Apparatus for Bending at low-temp of use during the resistance to bend(ing) of coaxial cable is tested, Fig. 5 is a superfine coaxial cable of the present invention, and have traditional marshalling screen and horizontal in the figure of screen as the shield effectiveness of the coaxial cable of external conductor layer, Fig. 6 has the profile of traditional marshalling screen as the coaxial cable of external conductor layer.In addition, accompanying drawing only is used for most preferred embodiment of the present invention is made an explanation, and should understand the yardstick that it had not considered each several part.

Fig. 1 and Fig. 2 represent superfine coaxial cable 10 of the present invention, this superfine coaxial cable 10 for example, around with the center conductor 1 of the stranded formation of copper alloy wire of the silver-plated stanniferous of 7 about 50 μ m of external diameter, coat the insulator 2 of tetrafluoroethene perfluoroalkyl-vinyl ether copolymers (PFA) of the about 45 μ m of thickness, around this insulator 2, as the shielding material single cord that external conductor is used, have copper alloy wire with the zinc-plated stanniferous of the about 50 μ m of external diameter many (present embodiment is 28) be wound into helical form and form the 1st horizontal around screen 3.

The 1st horizontal around screen 3, be the shielding material single cord of using as external conductor equally, have copper alloy wire with the zinc-plated stanniferous of the about 50 μ m of external diameter many (present embodiment is 34) be wound into helical form and form the 2nd horizontal around screen 4.By these the 1st horizontal around screen 3 and the 2nd horizontal formed around screen 4 dual horizontal around screen 5.Thus, coat form around the insulator 2 of center conductor 1 the 1st horizontal, compress by not shown mould around screen 3 and the 2nd horizontal around screen 4.The result makes driving fit between the dual horizontal shielding material single cord on screen 5.

Thereafter, the 1st horizontal scroll shielding the 3 and the 2nd horizontal around screen 4 promptly, compressed dual horizontal around screen, as surrounding layer, formed the surrounding layer 6 of the superfine coaxial cable 10 that is coated with PFA.With this above-mentioned superfine coaxial cable 10 for example be provided in, in the clamshell phone 30 shown in Figure 3.

Clamshell phone 30 shown in Figure 3 comprises: what have antenna 31 and display part 32 etc. is subjected to words portion 33; And by signals such as voice signal or operation keys, transmission mail send words portion 34, by hinge portion 35 with this be subjected to words portion 33 with send words portion 34 rotationally mechanical type combine.In this hinge portion 34, have the signal of mounting on printed base plate loop 36 takes place, signal takes place accordingly with the operation of voice signal or operation keys.

The stube cable of loop 36 usefulness takes place as antenna that is subjected to words portion 33 31 in this clamshell phone 30 of connection and the signal that send words portion 34 that signal takes place, in order to set superfine coaxial cable 10 of the present invention, coaxial cables 10 that will be by configuration in the hinge portion 35 one distolateral, be installed on the antenna 31 that is subjected to words portion 33, another distolateral signal that is installed in takes place in the loop 36, during the work of this clamshell phone 30 after energized, loop 36 can take place from signal and send signal or accept signal from the outside in the antenna 31 by being subjected to words portion 33.

For this clamshell phone 30, use the testing machine 40 that bends right and left shown in Fig. 4 (a) and Fig. 4 (b), the resistance to bend(ing) of the of the present invention superfine coaxial cable 10 that promptly sets as the lead of antenna as stube cable has been done investigation.

Promptly, distolateral upper end side 41 that is fixed on the testing machine 40 that bends right and left with superfine coaxial cable 10 of the present invention, between the axle 42 of this another distolateral bend 43 by having a center roller 42 separately, and at its suspension load w (127gf) bottom, under this state, with bend 43 with about 90 the degree angle of bend carry out bending, superfine coaxial cable 10 then of the present invention bends right and left because of axle 42.According to said method carried out the bend test (bending radius 7.5mm) of superfine coaxial cable 10 of the present invention.In this resistance to bend(ing) test, obtain the number of times of inner conductor or not conducting of external conductor.

As a comparative example 1, use the copper alloy wire of the zinc-plated stanniferous of the about 50 μ m of external diameter, with stube cable is the external conductor of coaxial cable, make number 6 (Japanese: hold number), beat the marshalling shielding structure of counting (Japanese: beat number) 8, other structure makes the coaxial cable identical with the structure of coaxial cable 10 of the present invention.

As a comparative example 2, use the copper alloy wire of zinc-plated stanniferous of the about 50 μ m of external diameter many (28), be the external conductor of coaxial cable with stube cable, be wound into helical form and form and horizontally construct around screen.Other structure makes the coaxial cable identical with the structure of superfine coaxial cable 10 of the present invention.

Adopt said method, the resistance to bend(ing) of the coaxial cable of coaxial cable of the present invention and comparative example 1 and comparative example 2 has been done investigation, its result sees table 1 for details.

[table 1] the life test result that bends right and left

	The life-span number of times bends right and left
	The life-span number of times bends right and left	Coaxial cable with external conductor of the present invention	129000 times
The coaxial cable (comparative example 1) that has the marshalling shielding as external conductor	89000 times		129000 times
	89000 times	As external conductor have horizontal around coaxial cable (comparative example 2)	138000 times

As can be seen from Table 1, have the coaxial cable of external conductor of the present invention, its flex life is to have traditional marshalling structure about 1.5 times as the coaxial cable of external conductor.

Again, Fig. 5 represents the investigation result to the shield effectiveness of the coaxial cable of coaxial cable of the present invention and comparative example 1 and comparative example 2.What A represented comparative example 1 has the shield effectiveness of the coaxial cable of marshalling screen structure as outer lead, B represents to have the shield effectiveness of the coaxial cable of outer lead of the present invention, C be expression comparative example 2 have the shield effectiveness of the coaxial cable of horizontal scroll screen structure as outer lead.

The mensuration of shield effectiveness is to implement according to the absorption clamping method that is defined as benchmark with CISPR Pub.16.

From table 1 and Fig. 5 as can be seen, the shield effectiveness A of the coaxial cable of comparative example 1 is good, but bendability and pliability are also insufficient, and the bendability of the coaxial cable of comparative example 2 and pliability still can, but shield effectiveness C is insufficient, compare with it, coaxial cable of the present invention, bendability, pliability or shield effectiveness in comparative example 1 and the comparative example 2 no matter good property of which invention all possesses, therefore, can in desirable scope, satisfy the desired bendability of clamshell phone or notebook computer, pliability and shield effectiveness fully.

In sum, adopt superfine coaxial cable of the present invention, owing to around center conductor, be coated with insulator, set horizontal around this insulator around screen, horizontal in the coaxial cable that is equipped with surrounding layer and is constituted around the screen at this, it is characterized in that, described horizontal be dual horizontal around screen around screen, its structure is the shielding material single cord of reeling around described insulator, form the 1st horizontal around screen, horizontal around screen the 1st again, with form the 1st horizontal on the same direction of shielding material single cord of screen coiling shielding material single cord, form the 2nd horizontal around screen, these the 1st are horizontally horizontally being set surrounding layer around screen and the 2nd after screen compression, therefore, frequently carry out the stube cable of clamshell phone of on-off action or the desired bendabilities such as interface cable of notebook computer during use or when not using, the pliability aspect, and aspect shield effectiveness, can in desirable scope, fully be met.

Claims

1. superfine coaxial cable, around center conductor, be coated with insulator, around this insulator, be equipped with horizontal around screen, at this horizontal surrounding layer that around screen, is equipped with, it is characterized in that, described horizontal be dual horizontal around screen around screen, its structure is the shielding material single cord of reeling around described insulator, form the 1st horizontal around screen, horizontal around screen the 1st again, forming the 2nd horizontally with forming the 1st horizontal coiling shielding material single cord on the identical direction of the shielding material single cord of screen, these the 1st are horizontally horizontally being set surrounding layer around screen and the 2nd after the screen compression around screen.