TWI260827B - Electric connector - Google Patents

Abstract

In the present invention, a second connecting point (15) installed from the front side onto a housing (4) is a non-zero insert force (non-ZIF) type. The present invention includes a main unit (41), a fixed beam (43), and a flexible beam (45). The fixed beam (43) extends in parallel along the insertion direction (X) of the main unit (41) towards a connecting unit (2). The flexible beam (45) extends from the main unit (41) towards the inside of an accepting hole (44) on the housing (4) and includes a first plate (47), a second plate (48), and a narrow slot (S). The first plate (47) extends in parallel with the fixed beam (43) and the second plate (48) bends backwards from the first plate (47). The narrow slot (S) is located between the two plates (47, 48) for the insertion of the connecting unit (2). By means of the elastic rebound force of the expanded narrow slot (S) and the force applied by the inclined surface (57) of the space wall (56) for holding the housing (4) on the front end (2a) of the connecting unit (2), pressure is applied on the contact part (49) of the second connecting point (15).

Description

1260827 发明, invention description: [Technical field to which the invention pertains] The present invention relates to connection for, for example, FPC (Flexibie Pnnted)

Circuit: An electrical connector of a flat connecting member such as a bow-shaped printing f-plate. [Prior Art] The private connection is such that a connecting member such as a front insertion member is inserted between the narrow holes of the joint with a specific insertion force through the opening portion of the outer casing, and the contact portion is obtained by the elastic rebound force of the narrow opening. The contact pressure of the point) is called Non-ZIF (Non-Zero lnsert Force). On the other hand, after the connecting member is inserted into the casing with no insertion force, the connecting member is pressed at the contact portion of each contact to ensure the ZIF (Zer〇lnsert) of the pressing (contact pressure) by closing the lid. Force: Zero insertion force type is electrically connected. There is also a so-called IFZIF (D〇uble Zer〇insert Force) type electrical connector in which the contact portions of the second and second contacts which are pressed in from the rear of the casing are deviated from each other (for example) In the electrical connector of the above-mentioned JP-A-2002-252049, the contact point of the second contact is placed on the first side of the ZIF type so that the second contact is pressed in from the front side. The contact portion of the contact is the rear (the insertion direction side of the contact member), and it can be made into the Non-ZIF type. The second contact that is pressed in front of the outer casing is provided with the main 脰 α disposed in front of the outer casing. The first piece extending rearward along the bottom wall of the holding hole of the outer casing and the second piece which is folded back in a U-shape from the front end of the first piece to the front. In order to reduce the size of the electrical connector, In a state in which the connecting member is not inserted,

0 ',) 2 \ 925 76 DOC 1260827 The height of the contact portion of the first piece is dispersed so that the first piece of the second contact is in contact with the bottom wall of the holding hole of the outer casing. The so-called coplanarity of the complex contact portion cannot be achieved. On the other hand, the FPC as the connecting member is basically soft by its name, and is not bent even when it is inserted into the casing, and has a slight hardness (rigidity) which is easy to insert, and is excellent in workability. Therefore, there is a case where a slightly rigid FPC is used. As described above, in the case where the height of the contact portion is dispersed or the case of using a rigid FPC or the like, the contact portion of the second contact portion and the contact member are in good contact with each other. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is possible to reliably connect a small electrical connection in a case where the contact portion of the contact portion is dispersed or when a rigid Fpc or the like is used. For the purpose. In order to achieve the above object, the present invention is characterized in that it has an insulating fixed outer casing which can insert a flat connecting member in a specific insertion direction, and a movable outer casing which is supported by the fixed outer casing at the 2 position into (four) moving operation '· and the i-th and second contacts, the mutual horizontal row is held in the fixed outer casing, and the contact portion of the second contact is disposed at the contact portion of the "妾 point; In the insertion direction side, the movable outer casing is formed in a state in which the connecting member is fitted with the insertion force without the insertion force between the contact point of the first contact and the first contact. The connecting member can be pressed to the contact portion of the first contact, the second contact includes: a main body portion; the fixing beam is extended by the main body portion parallel to the specific insertion direction, and the force shell is solid

Ο \〇2\92576 DOC 1260827 fixed hole press; and elastic beam, which extends from the main body portion into the receiving hole of the outer casing. The elastic beam includes a first sheet portion having a contact portion extending along an opposing wall of the valley hole, and a second sheet portion folded back from the leading end portion of the first sheet portion, and the second portion Between the portions, the narrow hole can be engaged with the connecting member with a specific insertion force. The solid body shell includes: a force applying hand; and the connecting member by inserting the narrow hole of the second joint is narrowed. The position of the hole away from the force can be added to the joint part of the connecting member. In the present invention, the connecting member inserted into the outer casing is inserted into the contact portion of the i-th contact of the type, and then the narrow hole of the r-th contact of the human mZIF type is inserted. Then, the movable casing is operated to the second position to be pressed. w plus the elastic rebound force that is expanded by the narrow hole of the second joint, by the force of the solid outer casing, the joint member can be added to the contact portion of the second joint even if the brother 2 joint When the height of the contact portion is dispersed, or as a connecting member', for example, when a more rigid coffee is used, the connecting member can be surely contacted with all the contact portions of the second contact. Further, the height of the electrical connector can be extremely lowered to achieve a low profile by the one piece of the stalk of the squirrel along the opposite wall of the accommodating hole. Further, the slanting of the opposing wall of the outer casing and the partition wall extending from the opposite side wall toward the side wall of the pair of 7 walls to partition the side of the receiving hole constitute the above-mentioned force by the inclined surface provided on the partition wall of the area In the case of the means, the leading end portion of the connecting member to be inserted is urged toward the (fourth) portion, and the biasing force of the connecting member to the contact portion of the first piece portion is increased, and the butt joint portion pressure (contact pressure) can be surely obtained. Furthermore, the starting point of the inclined surface is disposed on the narrow hole of the second contact point

〇:\92\92576 DOC 1260827 The specific insertion direction side 6 ^ λ ^ " τ The effect of the inclined surface will be connected to the boring hole, there will be no discomfort during insertion. J's first contact is along the above specific insertion direction and the opposite direction: while the clothing is fixed to the outer casing, the second contact is attached to the fixed casing along the specific insertion direction, the younger brother-contact When the lead portion is placed at a position facing the fixed outer casing, the assembly area of the circuit board on which the electrical connector is to be assembled can be remarkably reduced, and the miniaturization can be achieved by complementing the above-described low-profile. [Embodiment] A preferred embodiment of the present invention will be described with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic plan view showing a closed state of a cover of an electrical connector according to an embodiment of the present invention, and Fig. 2 is a schematic front view showing an electrical connector in a closed state of the cover. Referring to Fig. 1 and Fig. 2, an electrical connector 具备 is provided with a casing 4 which is a fixed casing formed of an insulating synthetic resin by inserting and unplugging a connecting space 3 such as an FPC or the like (see Fig. 6) from the front. . The front half of the outer casing 4, as shown in Fig. 6, can be opened upward through the opening portion 6 of the upper plate portion 5 of the outer casing 4. Referring to the drawing, the outer casing 4 is provided with a cover 7 as a movable outer casing which is rotatable around the rotation axis C. The casing 7 is formed of an insulating synthetic resin molded article, as shown in Fig. 6, by rotation. The opening portion 6 is opened and closed. Referring to Fig. 1, the cover 7 is reinforced as a reinforcing member, for example, a reinforcing line 8, 9 having a circular cross section. One of the reinforcing wires 8, 9 is inserted and buried when the resin of the cover 7 is formed. On the other hand, one side of the reinforcing wire 8 series cover 7 is bent to the crank portion 0 N92'92576. The DOC -9-1260827 one-side reinforcing wire 8 is provided at one end portion by the side portion 7a of the cover 7 The projection constitutes the pivoting shaft 10. Each of the pivoting shafts 10 extends along the axis of rotation C of the cover 7 toward the sides 7 . Each of the rotating support shafts 1 is rotatably supported by the metal reinforcing plates 12 respectively fixed by the side plates U corresponding to the outer casing 4. One end portion of the other reinforcing wire 9 is exposed by one of the side portions 7a of the cover 7, and the exposed portion constitutes a pair of locking engaging portions 13. Each of the locking engagement portions b is locked to the reinforcing plate 12 to lock the cover in a closed state. The fine sides are separated from the side plates of the outer casing 4 by the side portions of the above-mentioned insertion space 3. Further, the outer casing 4 has a plurality of plural and second contacts 14, 15 which are alternately arranged in the lateral direction. Referring to FIG. 3 of the cross-sectional view taken along line Ill-Ill of FIG. 2, the reinforcing plate (2) includes a main body portion 16 and a fixing piece portion 18 which is extended from the main body portion 16 in the fixing hole 17 of the outer casing 4. The front side is inserted and fixed via a locking protrusion; the second extending piece 19 is extended upward from the main body portion 16; the second extended piece 2 is extended obliquely upward from the main body portion 16; and the third extension A sheet 21 is provided which is extended from the main body portion downward. The first extension piece 1 9 is a rotation support portion 22 having a groove that supports the rotation support shaft 1 〇 to rotate freely. The detachment restricting portion 23 of the outer casing 4, for example, formed by a projection, prevents the pivot shaft 10 from being detached from the rotation support portion 22. The second extension piece 20 includes a locking portion 24 formed by a circular arc surface. In the state in which the botanical 7 is closed, the lid 7 of the closed state can be locked by engaging the locking portion 13 with the locking portion 24. The third extension piece 2 1 has a fixing portion 26 soldered to the surface 25a of the circuit board 25. Secondly, referring to FIG. 4, which is a cross-sectional view taken along line IV-IV of FIG. 2, the first joint 1 4 0 \9:\9:576 DOC -10- 1260827 is formed by sheet metal and is installed by the rear of the casing 4. . The second contact point ι4 includes: a main body portion 27, and a fixing piece portion 29 which is extended from the upper portion of the main body portion 27 to the front and the fixing portion 28 of the outer portion 4 is fixed via the fastening projection; the elastic piece portion 3〇, It is extended from the lower portion of the main body portion to the front insertion space 3, and the lead portion 31 is welded to the surface 25a of the circuit board 25 from the lower end of the main body portion 27 to the rear portion of the casing 4. 4, the elastic portion 30 is housed by the rear side of the receiving groove 33 formed on the upper surface of the lower portion 32 of the outer casing 4. The rear end portion of the elastic piece portion is supported by the main body portion 27 in a single hand. The front end portion 34 of the elastic piece portion 3 is formed with a contact portion 35 formed by a mountain-shaped projection for securing the contact pressure of the connecting member 2. The contact portion 35 of the elastic piece portion 30 is guided in and out of the insertion space 3. The front end 36 of the fixing piece portion 29 is exposed to the front of the upper plate portion 5 of the outer casing 4, and extends toward the cam portion 37 of the rear edge portion of the cover 7 provided in the closed position. The cam portion 37 has a substantially rectangular cross section, and the cam portion 37 is adjacent to the escape portion 38 formed by the through hole. The escape portion 38 is for avoiding interference of the front end 36 of the fixed piece portion 29 when the cover 7 is opened from the closed state. When the connecting member 2 is inserted into the insertion space 3 without insertion force, the cover 7 is closed, and the connecting member 2 pressurizes the contact portion 35 of the first contact 14 to secure the contact pressure. That is, the first contact 14 is used for the ZIF (zero insertion force) type. Specifically, one surface of the cam portion 37 is formed by the pressure receiving portion 39 received by the front end 36 of the fixing portion 29 in the closed state of the lid 7, and the opposing surface (back surface) of the pressure receiving portion is a pressurizing portion. 40. The pressing portion 4 is attached to the contact portion 35 of the working contact 14 when the cover 7 is closed, and the pressure receiving portion 39 is provided by the front end of the fixing piece portion 29

-1U

0 \92\92576 When the DOC 1260827 is accepted, the connecting member 2 is pressurized to the contact portion % of the first contact 2〇. The cam portion 37 has a surface opposite to the pressurizing portion 4, and has a facing state when the 盍7 is opened as shown in Fig. 6 and a facing surface when the contact portion of the contact 14 is opened. In the open state of the cover 7 between the opposing surface 7 () and the contact portion ^ when opening, the connecting member 2 can be inserted without insertion force, and is equal to or greater than the thickness of the free state of the connecting member 2. A full gap of 8 inches. On the one hand, in the state in which the cover 7 is closed, referring to FIG. 4, between the addition of (4) 4Q and the contact depression, the thickness of the free state of the connection member 2 is insufficient, and the connection members can be pressurized to the contact portion 35. gap. Next, referring to Fig. 5, which is a cross-sectional view taken along line V-V of Fig. 2, the second joint (5) is formed of sheet metal and is mounted by the front side of the outer casing 4. The second contact 15 includes a main body portion 41 and a fixing piece portion 43 which is fixed to the fixing hole 42 of the outer casing 4 in parallel with the insertion direction X of the connecting member 2 by the main body portion 41, and is fixed by the engaging projection. The elastic piece portion 45 extends from the main body portion 41 into the receiving hole of the outer casing 4, and the 'line portion 46 is extended below the main body portion 4'' to the front surface of the outer casing 4 and soldered to the surface 25a of the circuit substrate 25. . The first connection ", i 1 5 ', the connection member 2 inserted into the insertion space 3 in the open state of the crucible 7 is inserted with a specific insertion force between the narrow holes S, and the elastic reaction force of the narrow hole expansion is described later. The contact pressure of the contact portion 49 (contact portion) is N0n-ZIF (non-zero insertion force). The elastic sample 45 includes a first piece portion 47 which is parallel to the above fixed beam. 43 and the second piece 48 are folded back between the first end portion 47a of the first piece portion 47 and the first piece portion 47, and are separated by a narrow hole S into which the contact structure 2 is inserted. The tip end portion 48a of the two-piece portion 48 is provided as shown in FIG.

0 \92W2576 The connecting member 2 of the DOC 1260827 is pressed by the elastic reaction force of the second piece portion 48 at the contact portion 49 of the first piece portion 47, and the pressing portion 5 is formed by a mountain-shaped projection. The second piece #48 includes a slightly orthogonal portion 51 which is bent by the tip end portion 47a of the first piece portion 47 to be slightly orthogonal to the upper plate portion 5 of the outer casing 4; the inclined shape 4 knife 5 2' is bent obliquely forward from the distal orthogonal portion 51 to the contact portion, and the pressurizing portion 50 is provided at the tip end portion of the inclined portion 52. In the state in which the connecting member 2 is inserted into the narrow hole s, as shown in Fig. 5, between the first piece 47 and the facing surface of the opposite wall portion 32 opposite thereto, a minute is provided. The gap 53. The gap amount d is set to, for example, 0·02 to 0·1 mm. It is better to set it to 〇·〇4~0.06 mm. In other words, the elastic beam 45 is elastically deformable by bending the base end portion 47b of the first piece 47 of the main body portion 41 as a fulcrum in a movable range corresponding to the gap amount d. Further, the base end portion 47b of the first piece portion 47 which is the bending fulcrum of the elastic beam 45 is separated by a specific amount L from the edge portion 32b of the receiving surface 32a of the lower plate portion 32, and a space 54 is provided therebetween. Thereby, the elastic beam 45 is easily deformed by bending. The receiving hole 44 of the outer casing 4 accommodates at least a portion 5 5 of the elastic beam 45 which forms a narrow hole s. Referring to Figs. 4 to 6 and 8, a partition wall 56 is provided which is formed by the upper plate portion 5 of the outer casing 4 extending from the side of the lower plate portion 32 to the adjacent receiving hole 44. The partition wall 56 has an inclined surface 57 that urges the tip end portion 2a of the connecting member 2 toward the first sheet portion 47 side of the elastic beam 45. The inclined surface 57 is inclined so as to become lower toward the rear (the insertion direction X of the connecting member 2), i.e., close to the first sheet portion 47. 〇: \9:\92576 DOC -13 - 1260827 ft?, Fig. 8' is provided with a fixing hole 28 for fixing the fixing piece 29 of the first contact 14 to the partition wall 56. Further, the partition wall 56 is provided with a stopper portion 58 which intersects the end portion of the inclined surface 57. As shown in Fig. 7, the blocking portion 58 is determined by the insertion of the tip end portion 2a of the insertion member 2 to determine the insertion position of the connecting member 2. When the connecting member 2 is connected to the connector 1, as shown in Fig. 6, the connecting member 2 is inserted into the insertion space 3 of the casing 4 when the cover 7 is opened. At this time, the tip end portion 2a of the connecting member 2 smoothly passes through the contact portion 35 of the first contact 14 of the ZIF, and the narrow hole S of the second contact 15 for the Non-ZIF on the back side is elastically stretched. The contact portion 49 is opened, and next, as shown in FIG. 7, the first sheet portion 4 7 side and the blocking portion 5 of the contact point 1 5 are urged by the <page slope surface 57 of the partition wall 56. 8 abuts 'by this, the connecting member 2 is positioned at a normal insertion position. Next, when the 7 is closed, the contact between the connecting member 2 and the contact portion 35 of the contact 14 of the first work is achieved by the action of the pressurizing portion 4A. Furthermore, the present invention is not limited to the above embodiment. For example, the present invention can be applied to an FCC (Flexible Flat Cable) or a PCB instead of an FPC (Flexible Printed Circuit). Pnnted Circuit Board: Printed circuit board and other connecting members. Further, the connecting member of the present invention can also be applied to a vertical electrical connector that is not inserted laterally but from above. Industrial Applicability According to the present embodiment, the elastic repulsive force of the narrow hole S of the second joint 15 is expanded to fix the inclined surface 57 of the partition wall 56 of the outer casing 4, and the tip end of the connecting member 2 is attached. The portion 2 urges the side of the first portion 49 of the elastic beam 45 to increase the biasing force applied to the contact portion 49 of the second contact 15 by the second member, so that the contact portion 49 can be reliably pressed.

〇 '92\92576 DOC 14 - 1260827 (contact pressure) for improved reliability. Therefore, even if the height of the contact portion of the plurality of second contacts 15 is dispersed, or as the connecting member 2, {column uses a more rigid coffee case' by the first! And the second portion absorbs this to reliably connect the connection member to the contact of all the contact portions of the second contact 15. Further, the second connector portion 47 of the elastic beam 45 of the second contact 15 is formed as the opposite wall lower plate portion 32 of the receiving hole 44, and the electrical connector can be used! The height is extremely lowered to achieve low back.

The starting point of the inclined surface 57 and the specific insertion direction X. Further, the connecting member 2 is urged toward the contact portion 49 side 57a, and the narrow hole s of the second contact 15 is disposed on the upper side, so that the inclined surface 57 is not provided. The effect of inserting the connecting member 2 into the narrow hole 3 does not cause any discomfort at the time of insertion. Also make the first and second contacts μ,! 5, the lead portions 31 and 46 which are mutually connected to the fixed casing 4' in the opposite direction are disposed at positions facing each other across the fixed casing, so that the assembly area of the circuit board 25 to which the electrical connector is to be assembled can be remarkably reduced. In addition to the above-described low-profile, the electrical connection can be made small, and since the first working piece portion 47 of the elastic beam for the second contact 15 of the N〇n-ZIF can move a small amount of gap d, It is possible to surely connect the connecting member 2 to all the contact portions 49 of the second contact 15 . Further, as long as the small gap amount d as described above, the height of the electrical connector is hardly affected, and the miniaturization is not impaired. In particular, it is preferable to set the gap amount d to ?02 0.1 mm, and it is preferable that the gap amount d is 〇〇4 to 〇〇6 mm, and the connection between the two vertical electrical connectors 1 and the connection of the above-mentioned contact portion 49 can be surely performed. .

〇 '92\〇2576 DOC 1260827 Further, by providing the above-mentioned empty space 54, the elastic beam 45 of the second contact 15 is easily deformed by bending, and the first step can be made more sure! The sheet portion 47 is only moved by the gap amount d. However, a configuration may be adopted in which no gap is provided between the first piece portion 叨 and the lower plate portion 3 2 of the elastic beam 45 of the second contact 15 . Further, although the inclined surface 57 of the partition wall 56 urges the connecting member 2 rearward from the contact portion 49 of the second contact 15 (the inner side in the insertion direction X of the connecting member 2), instead of this, The connection member 2 may be urged toward the first sheet portion 47 at a position forward of the contact portion of the second contact 15 . BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic plan view showing a state in which a lid of an electrical connector according to an embodiment of the present invention is closed. Fig. 2 is a schematic front view of the electrical connector of the 'closed state of the lid. Figure 3 is a section gj along the Πΐ_ΙΠ line of Figure 2. The reinforcing plate is omitted to indicate the hatching of the section. Figure 4 is a section (4) taken along line IV-IV of the ®2. The hatching of the section is omitted for the first contact. Back / σ Figure 2 is a cross-sectional view of the V-V line. The hatching of the cross section is omitted for the second contact. Figure 6 is a step of the cross-sectional member insertion of the electrical connector. Figure 7 is a cross-sectional view of the electrical connector. Fig. 8 is a part of the main part of the casing. [Description of the symbol of the drawing] ’ indicates a state in which the lid is opened.

0 u>:\92576 DOC -16- 1260827 1 Electrical connector 2 Connecting member 2a Front end portion J of connecting member 2 Inserting space 4 Housing 5 Upper plate portion 6 Opening portion 7a Cover 7 side portion 7b Cover 7 rear edge portion 8 Reinforce Line 9 Reinforcement line 10 Rotary support shaft 11 Side plate 12 Reinforcement plate 13 Fastening part 14 Contact point 15 Contact 16 Main body part 17 Fixing 孑L 18 Fixing piece 19 Extension piece 20 Extension piece 21 Extension piece 22 Main body part Rotating support

Ο \92\92576 DOC 17 1260827 23 Pull-out restricting portion 24 Locking portion 25 Circuit board 25a Surface 26 Fixing P 27 Main body portion 28 Fixing 咅P 29 Fixing piece portion 30 Elastic piece portion 31 Lead portion 32 Lower plate portion 3 3 Reception groove 34 Elastic piece portion 30 Front end 35 Contact portion 36 Fixing piece portion 29 Front end 37 Cam portion 38 Hand escape portion 39 Pressure receiving portion 40 Pressing portion 41 Main body portion 42 Fixing pin 43 Fixing beam 44 Receiving hole 45 Elastic Beam 0 '.9:\92576 DOC -18 - Lead end portion of the lead portion portion 47 of the lead portion portion 48 of the tip end portion of the portion of the lead portion portion 47 of the lead portion portion 47 is slightly orthogonal to the portion of the inclined portion Part of the S, the partition wall, the inclined surface, the blocking section, the narrow hole rotation axis -19 -

Claims (1)

1260827 Pickup, patent application scope: l An electrical connector comprising: an insulating fixed outer casing for inserting a flat connecting member along a specific insertion direction; and a movable outer casing supporting the fixed outer casing, which can be used in the second And moving the second position; and the first and second contacts are alternately held in a fixed outer casing; and the contact portion of the second contact is disposed at the contact portion of the first contact at the specific insertion In the state of the first position, the movable casing is formed with a gap between the contact portion of the contact point and the second contact position, and the second member is in the state of the second position. Pressing the connecting member to the contact portion of the second contact; the second contact includes: a main body portion; and a fixing beam extending parallel to the specific insertion direction by the main body portion and pressed into the fixing hole of the outer casing; The elastic beam is extended from the main body portion into the receiving hole of the outer casing; the elastic beam system comprises: a second piece portion having a contact portion extending approximately opposite the opposite wall of the receiving hole; And the second part, the department The front end portion of the first piece portion is folded back, and a narrow hole that can be fitted to the connecting member with a specific insertion force is defined between the first piece portion and the contact portion; the fixed outer casing includes: a force applying means The contact member is pressed against the joint portion by the force of the connecting member that is inserted into the narrow hole of the second contact at a position away from the narrow hole. 2. The electrical connector of claim 2, wherein the partition wall is provided with a partition wall extending from the wall of the fixed outer casing opposite to the opposite wall toward the opposite wall side to partition the side of the receiving hole The above-mentioned means of applying force is formed by the inclination of 0:\92\9:576 DOC 1260827 located at the partition wall of the area. 3. For the electric ^ μ ^ ^ m state of the second item of the patent application, wherein the inclined surface is ", the narrow hole of the rut is disposed on the insertion direction side of the above 4, , ^ ^ meaning symbol. • For example, the power, strict ih, ten, 4± + 4 connections of the scope of the patent scope, wherein the first contact is installed in the opposite direction in the opposite direction; the second contact is installed along the above special insertion direction In the fixed case, the brother 1 and the brother 2 are connected to the fixed line.卜< and the relative position has a guide 5. As in the second paragraph of the patent application scope, 荽盥μ, +1 士 a bite mouth, wherein the first contact system is W ^ Π in the opposite direction is mounted on the fixed casing The 2nd contact is mounted on the fixed outer casing along the upper direction; the younger one and the second joint are in the bridge-line section.疋 Λ Λ Λ 相对 相对 相对 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · The direction is mounted on the fixed outer casing; the first direction is mounted on the fixed outer casing; the wire portion. The larger one is fixed to the outer casing and has a relative position to the O:\92\92576 DOC