TWI668921B - Floating connector and conductive terminal thereof - Google Patents

Abstract

A floating connector includes a plug cavity and a plurality of conductive terminals. The plug cavity includes a top wall and two side walls on opposite sides, each side wall being provided with a plurality of retaining portions. A plurality of conductive terminals are respectively mounted on the plurality of retaining portions of the plug cavity, each of the conductive terminals being an integrally formed one-piece construction and comprising a contact segment, a curved segment, an elastic segment, and a fixed segment. The contact section is disposed in the plug cavity, one end of the curved section is connected to the contact section, and the other end is fixed to the corresponding retaining portion, the elastic section and the fixed section are located outside the plug cavity, and the two ends of the elastic section are respectively connected to the curved section One end and a fixed section. The plug cavity is movable relative to the plurality of fixed segments such that the plurality of resilient segments are compressed to provide a restoring force to the docking cavity.

Description

Floating connector and its conductive terminal

The invention relates to a connector, in particular to a floating connector and a conductive terminal thereof.

The existing floating connector includes a plug cavity and a plurality of conductive terminals mounted inside the plug cavity. The plug cavity can move relative to the conductive terminal and provide a buffering force through the conductive terminal to achieve a shockproof effect. However, the design of the conductive terminal structure in the existing floating connector does not further enhance its shockproof effect. Furthermore, the manner in which the conductive terminals are mated with the plug cavity (eg, the conductive terminals are disposed inside the plug cavity, and the conductive terminals are fixed to the plug cavity on both sides of the elastic section thereof) also limits the performance of the conductive terminals.

Accordingly, the inventors believe that the above-mentioned defects can be improved, and that the invention has been studied with great interest and with the use of scientific principles, and finally proposes a present invention which is rational in design and effective in improving the above-mentioned defects.

Embodiments of the present invention provide a floating connector and a conductive terminal thereof, which can effectively improve defects that may occur in the existing floating connector.

The embodiment of the invention discloses a floating connector, comprising: an insulating housing, comprising a long insertion cavity, the insertion cavity defining a length direction and comprising a top wall and two side walls on opposite sides Providing a plurality of retaining portions on an outer surface of each of the side walls, a plurality of the retaining portions on each of the side walls being apart from the top wall and arranged in a row along the length direction; and a plurality of conductive terminals Install separately a plurality of the retaining portions of the plug cavity and arranged in two rows parallel to the length direction, each of the conductive terminals being an integrally formed one-piece construction and comprising: a contact segment along a height direction Inserted in the insertion cavity; a curved section, one end is connected to the contact section, the other end of the curved section is fixed to the corresponding holding portion; and an elastic section and a fixed section are located in the The two ends of the elastic section are respectively connected to the other end of the curved section and the fixed section; wherein the plurality of the conductive terminals are substantially corresponding to the plug cavity Mirror-symmetrically disposed, a bottom edge of the plurality of the conductive terminals is substantially on a plane, and the plug cavity is spaced apart from the plane; the insulating housing can be fixed relative to the plurality of The segments are moved such that a plurality of the elastic segments are compressed to provide a restoring force to the insulative housing.

The embodiment of the invention also discloses a floating connector, comprising: a plug cavity comprising a top wall and two side walls on opposite sides, each of the side walls being provided with a plurality of holding portions; and a plurality of conductive terminals, Each of the conductive terminals is integrally formed in a one-piece configuration and includes: a contact segment disposed in the plug cavity; a curved segment, One end is connected to the contact section, the other end of the curved section is fixed to the corresponding retaining portion; and a resilient section and a fixed section are located outside the plugging cavity, and two of the elastic segments The end is respectively connected to the other end of the curved section and the fixed section; wherein the plug cavity is movable relative to the plurality of fixed sections, so that the plurality of elastic sections are pressed to provide a reply Force to the plug cavity.

Another embodiment of the present invention further discloses a conductive terminal of a floating connector, which is an integrally formed one-piece construction and includes: a contact section; a curved section, substantially U-shaped, and one end of the curved section is connected to the contact And a fixed section, the two ends of the elastic section are respectively connected to the other end of the curved section and the fixed section; wherein the elastic section is substantially U-shaped, and the elastic section The center line is formed with an acute angle with the center line of the curved section; wherein the contact section portion adjacent to the curved section is formed extending from the curved section along a first direction, And the fixed segment portion adjacent to the elastic segment is formed to extend from the elastic segment along a second direction, the first direction being substantially parallel to the second direction and opposite to each other.

In summary, the floating connector and the conductive terminal thereof disclosed in the embodiments of the present invention can provide a better anti-shock effect through the structural design of the conductive terminal. Moreover, the matching of the conductive terminal and the plug cavity of the insulating housing can avoid the performance limitation of the insulating shell on the conductive terminal, so as to effectively improve the shockproof effect of the floating connector.

For a better understanding of the features and technical aspects of the present invention, reference should be made to the accompanying claims limit.

100‧‧‧Floating connectors

1‧‧‧Insulated housing

11‧‧‧Drawing cavity

111‧‧‧ top wall

112‧‧‧ side wall

1121‧‧‧ Holding Department

1122‧‧‧ Groove

113‧‧‧Terminal slot

1131‧‧‧ Plug interface

12‧‧‧ positioning cavity

121‧‧‧ Limit slot

1211‧‧‧ Large opening

1212‧‧‧Small opening

1213‧‧‧Limited step

2‧‧‧Electrical terminals

21‧‧‧Contact section

211‧‧‧Extension

212‧‧‧Clamping film

22‧‧‧Bend section

221‧‧‧ inside part

222‧‧‧Outside

223‧‧‧C-section

23‧‧‧ elastic section

24‧‧‧ fixed section

3‧‧‧Positioning column

31‧‧‧Limited

32‧‧‧Support

4‧‧‧End cover

200‧‧‧ boards

L‧‧‧ Length direction

H‧‧‧ Height direction

W‧‧‧Width direction

C22, C23‧‧‧ center line

‧‧‧‧ acute angle

Α1‧‧‧first angle

22‧‧‧second angle

D1‧‧‧ first direction

D2‧‧‧ second direction

1 is a perspective view of a floating connector of the present invention.

Figure 2 is an exploded perspective view of Figure 1.

3 is an exploded perspective view of another perspective of FIG. 1.

4 is a perspective view of a conductive terminal of the floating connector of the present invention.

Figure 5 is a plan view of Figure 4.

Figure 6 is a cross-sectional view taken along line VI-VI of Figure 1.

Figure 7 is a cross-sectional view showing the floating connector of the present invention mounted on a circuit board.

Figure 8 is a cross-sectional view of Figure 1 taken along line VIII-VIII.

Figure 9 is a cross-sectional view of Figure 1 taken along line IX-IX.

Please refer to FIG. 1 to FIG. 9 for an embodiment of the present invention. It should be noted that the related embodiments of the present invention are only used to specifically describe the embodiments of the present invention, so that It is to be understood that the scope of the invention is not intended to limit the scope of the invention.

As shown in FIG. 1 to FIG. 3, the embodiment discloses a floating connector 100 which can be used for plugging in an object connector (not shown) and applied to a moving object (such as a car). . Wherein, when the floating connector 100 and the object connector are relatively moved, the floating connector 100 can stably maintain an electrical connection with the object connector.

The floating connector 100 of the present embodiment includes an insulative housing 1, a plurality of conductive terminals 2 mounted on the insulative housing 1, and two positioning posts 3 movably received in the insulative housing 1, and Two end caps 4 fixed to the above-described insulating housing 1. The respective component configurations of the floating connector 100 of the present embodiment and their connection relationships will be separately described below.

It should be noted that the conductive terminal 2 of the present embodiment is described in conjunction with the above-mentioned insulating case 1. However, the conductive terminal 2 can also be applied separately, and is not limited to the embodiment. Furthermore, in other embodiments not shown in the present invention, the floating connector 100 may also omit the two positioning posts 3, the two end caps 4, and the positioning post 3 and the end cap 4 Insulating housing 1 part.

As shown in FIG. 2 and FIG. 3, the insulative housing 1 includes a long insertion cavity 11 and opposite ends of the insertion cavity 11 (eg, the left end of the insertion cavity 11 in FIG. 2). Two positioning chambers 12 at the right end). In order to facilitate the understanding of the embodiment, the plug cavity 11 defines a length direction L, a height direction H, and a width direction W that are perpendicular to each other.

The insertion cavity 11 includes a top wall 111 and two side walls 112 on opposite sides, and a plurality of terminal slots 113 extending through the cavity 11 in the height direction H are formed in the insertion cavity 11. Each of the terminal slots 113 is formed with a plug interface 1131 at a position corresponding to the top wall 111, and the plurality of plug interfaces 1131 are arranged in two columns parallel to the longitudinal direction L. That is, the plurality of terminal slots 113 are also arranged in parallel. Two columns in the length direction L.

A plurality of holding portions 1121 are disposed on an outer surface of each of the side walls 112, and The plurality of holding portions 1121 on each side wall 112 are apart from the top wall 111 and arranged in a row along the length direction L. In the embodiment, each of the side walls 112 is formed with a rib having a parallel longitudinal direction L, and the rib is away from the top wall 111 and has a plurality of notches formed from the bottom to the top. Each of the notches is defined as a holding. The portion 1121, but the configuration of the holding portion 1121 of the present invention is not limited thereto.

Furthermore, the inner surface of each of the side walls 112 is formed with a plurality of grooves 1122 (such as FIG. 6) away from the top wall 111, and the plurality of grooves 1122 are respectively located in the plurality of terminal slots 113, and Each of the grooves 1122 is recessed in the height direction H on the inner surface of the corresponding side wall 112, but the invention is not limited thereto.

The two positioning cavities 12 are integrally formed from the two short sides of the insertion cavity 11 respectively, and each positioning cavity 12 is formed with a limiting slot extending through the positioning cavity 12 in the height direction H. 121. Each of the limiting slots 121 has a large opening 1211 corresponding to the opposite side portions of the corresponding positioning cavity 12 (eg, the top of the positioning cavity 12 in FIG. 2 and the bottom of the positioning cavity 12 in FIG. 3). With a small opening 1212. Further, as shown in FIG. 8, the head space of each of the limiting slots 121 is larger than the bottom space, and the inner wall surface of each of the limiting slots 121 forms a limiting step surface 1213 between the top space and the bottom space. However, the specific configuration of the positioning cavity 12 of the present invention is not limited thereto.

As shown in FIG. 1 to FIG. 3 , the plurality of conductive terminals 2 are respectively mounted on the plurality of holding portions 1121 of the plug cavity 11 and arranged in two rows parallel to the longitudinal direction L, and the plurality of the embodiments are The conductive terminal 2 is preferably mirror-symmetrically disposed corresponding to the plug cavity 11 , but is not limited thereto. The plurality of conductive terminals 2 are respectively inserted into the plurality of terminal slots 113 of the plug cavity 11 and respectively correspond to the plurality of plug interfaces 1131.

Moreover, since each of the conductive terminals 2 of the present embodiment has substantially the same configuration, for convenience of explanation, the following will be constructed with a single conductive terminal 2 and its corresponding plug cavity 11 (eg, corresponding terminal slot 113). The description will be made with the holding portion 1121). However, in other embodiments not shown in the present invention, the configurations of the plurality of conductive terminals 2 may also differ.

As shown in FIG. 4 to FIG. 6 , the conductive terminal 2 is an integrally formed one-piece construction and sequentially includes a contact section 21 , a curved section 22 , an elastic section 23 , and a fixed section 24 . That is, one end of the curved section 22 (that is, the inner portion 221 of the curved section 22 described below) is connected to the contact section 21, and both ends of the elastic section 23 are respectively connected to the other end of the curved section 22. (that is, the outer portion 222 of the curved section 22 described below) and the fixed section 24.

In more detail, the contact segment 21 is inserted into the corresponding terminal slot 113 of the plug cavity 11 in the height direction H, and the contact segment 21 has a strip-shaped extension piece 211 and extends from the extension The two opposite edges of the sheet 211 are bent to extend the two holding pieces 212 formed. The extending piece 211 is flatly abutted against the inner surface of the corresponding side wall 112, and the bottom of each clamping piece 212 is preferably embedded on the inner wall surface of the corresponding terminal groove 113. Furthermore, the end edge of each of the holding tabs 212 of the conductive terminal 2 and the extending piece 211 are preferably located outside the area along which the insertion interface 1131 of the corresponding terminal slot 113 is projected in the height direction H. (Example: Figure 6 and Figure 9).

The curved section 22 has an inner portion 221 connected to the contact portion 21, an outer portion 222 connected to the elastic portion 23, and a C-shaped portion 223 connecting the inner portion 221 and the outer portion 222. The inner portion 221 and the outer portion 222 of the curved portion 22 are substantially parallel to each other in the present embodiment, so that the curved portion 22 is substantially U-shaped, and the corresponding side wall 112 is partially received. On the inner side of the curved section 22, the invention is not limited thereto.

Further, the inner portion 221 is located in the corresponding terminal slot 113 of the plug cavity 11, and the inner portion 221 faces the recess 1122 in the corresponding terminal slot 113 such that the inner portion 221 and the corresponding side wall 112 is set at intervals. The outer side The portion 222 and the C-shaped portion 223 are both located outside the insertion cavity 11 , and the outer portion 222 (that is, the other end of the curved section 22 described above) is fixed to the corresponding holding portion 1121 and abuts against the corresponding sidewall 112 . The outer surface.

It should be noted that the fixing manner between the outer portion 222 and the corresponding holding portion 1121 is described in the embodiment in which the fixing portion is embedded and fixed, but in actual application, it may be adjusted according to the designer's needs. Variety.

The elastic section 23 is located outside the insertion cavity 11 and the width of the elastic section 23 is the minimum width of the conductive terminal 2 in this embodiment. The elastic section 23 of the embodiment is substantially U-shaped, and the center line C23 of the elastic section 23 is opposite to the center line C22 of the curved section 22 (or the height direction H) with an acute angle α, and The acute angle α is between 30 and 60 degrees.

Furthermore, the elastic section 23 and the curved section 22 are formed with a first angle α1, and the first angle is between 120 and 150 degrees. a second angle α2 formed by the elastic section 23 and the fixed section 24, and the first angle α1 and the second angle α2 are within a range of 5 degrees (for example, the first angle α1 of the embodiment is substantially equivalent to the first angle Two angles α2), but the invention is not limited thereto.

The fixing section 24 is located outside the insertion cavity 11 and the fixing section 24 is an L-shaped structure suitable for surface mounting technology (SMT) welding in this embodiment, but the invention is not Limited to this. For example, in other embodiments not shown in the present invention, the fixing section 24 may also be a configuration suitable for plug welding.

The portion of the contact portion 21 adjacent to the curved portion 22 (eg, the bottom portion of the extending piece 211 in FIG. 5) is formed by extending from the curved portion 22 along a first direction D1, and adjacent to the elastic portion 23. The fixing section 24 (eg, the top of the fixing section 24 in FIG. 5) is formed by extending from the elastic section 23 along a second direction D2, and the first direction D1 and the second direction D2 are substantially in this embodiment. parallel And opposite to each other (eg, the first direction D1 of FIG. 5 is upward, and the second direction D2 is downward, and the first direction D1 and the second direction D2 are both parallel to the height direction H).

The above is a description of the configuration of the single conductive terminal 2 of the present embodiment, and other connection relationships of the conductive terminals 2 of the present embodiment will be described below. As shown in FIG. 7, the bottom edge of the fixing section 24 of the plurality of conductive terminals 2 is substantially on a plane, and the plug cavity 11 is spaced apart from the plane by a distance. That is, the bottom edges of the plurality of the fixed terminals 24 of the conductive terminals 2 can be fixed to a circuit board 200, and the plug cavity 11 is spaced apart from the circuit board 200 by a distance.

Thereby, the insulating housing 1 can be moved relative to the plurality of fixing segments 24 to press the plurality of elastic segments 23 to provide a restoring force to the insulating housing 1. Further, the outer portion of the curved portion 22 of each of the conductive terminals 2 and its corresponding holding portion 1121 can form a fulcrum, thereby enabling passage of the insulating housing 1 and its inner conductive terminal 2 when moving. The restoring force provided by the elastic segments 23 of the plurality of conductive terminals 2 maintains the contact segments 21 of the plurality of conductive terminals 2 in contact with the corresponding terminals of the object connector.

In addition, in each of the conductive terminals 2, away from the corner portion of the elastic section 23 of the insertion cavity 11, a projection area formed by orthographic projection in the height direction H toward the circuit board 200 is located outside the fixing section 24. .

As shown in FIG. 2, FIG. 7, and FIG. 8, the two positioning posts 3 are respectively movably inserted into the two positioning cavities 12, and the bottom edge of each positioning post 3 passes out of the positioning cavity. 12 is used together with the bottom edge of the fixing section 24 of each of the conductive terminals 2 to be fixed to the circuit board 200. It should be noted that the positioning post 3 in this embodiment is preferably made of metal so that the bottom edge of the positioning post 3 can be soldered to the circuit board 200, but the invention is not limited thereto. For example, in other embodiments not shown in the present invention, the material of the positioning post 3 may also be plastic, and the positioning post 3 is fixed to the circuit board 200 by fitting or screwing.

In more detail, in each positioning post 3 and the positioning cavity 12 inserted therein, the positioning post 3 includes a limiting portion 31 and a supporting portion 32 connected to the limiting portion. The cross-sectional area of the above-described stopper portion 31 (refer to the cross section in the vertical height direction H) is larger than the cross-sectional area of the support portion 32 (refer to the cross section in the vertical height direction H). The cross-sectional area of the limiting portion 31 is larger than the small opening 1212 of the positioning cavity 12 and smaller than the large opening 1211 , and the cross-sectional area of the supporting portion 32 is smaller than the small opening 1212 of the positioning cavity 12 .

Accordingly, in each positioning post 3 and its positioning cavity 12, the support portion 32 is disposed substantially in the bottom space of the positioning cavity 12, and a part of the support portion 32 (eg: The bottom portion passes through the small opening 1212 of the positioning cavity 12 described above. The limiting portion 31 is disposed in the head space of the positioning cavity 12 and is limited to the positioning cavity 12 .

Further, when the insulating housing 1 of the floating connector 100 does not have relative movement, the limiting portion 31 of each positioning post 3 is disposed at an interval from the inner wall surface of the corresponding positioning cavity 12; When the floating connector 100 and the object connector are relatively moved, the moving range of the insulating housing 1 is limited by the limiting portions 31 of the two positioning posts 3 described above. That is, when the moving distance of the insulating housing 1 is too large, the inner wall surface of each positioning cavity 12 (for example, the limiting step surface 1213) will abut against the limiting portion 31 of the corresponding positioning post 3, The insulating housing 1 cannot be moved further.

The two end caps 4 are separately detachably mounted to the two positioning cavities 12 of the insulative housing 1 and respectively close the two large openings 1211 to prevent the two positioning posts 3 from passing through the two large The opening 1211 is separated from the two positioning cavities 12. Wherein, the outer surface of each end cap 4 is preferably substantially flush with the outer surface of the adjacent insulating casing 1, but the invention is not limited thereto.

In addition, in other embodiments not shown in the present invention, the insulating housing 1 may be The utility model further comprises a protective shell formed by extending outwardly from the plugging cavity 11 , so that the elastic section 23 of the plurality of conductive terminals 2 is substantially accommodated in the protective shell, thereby achieving the effect of protecting the conductive terminal 2 through the protective shell. However, the above protective case does not contact any one of the conductive terminals 2.

[Technical Effects of Embodiments of the Invention]

In summary, the floating connector and the conductive terminal thereof disclosed in the embodiments of the present invention can provide a better anti-vibration effect through the structural design of the conductive terminal, and the plugging cavity of the conductive terminal and the insulating housing The cooperation (for example, the conductive terminal is fixed on the plug cavity only on one side of the elastic section, and the elastic section is exposed outside the plug cavity), thereby avoiding the performance limitation of the insulating housing on the conductive terminal, so as to effectively Improve the shockproof effect of the floating connector.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. The equivalents and modifications made by the scope of the present invention should fall within the scope of the claims of the present invention. .

Claims (10)

A floating connector comprising: an insulative housing comprising a plug cavity having an elongated shape, the plug cavity defining a length direction and including a top wall and two side walls on opposite sides, each of the a plurality of retaining portions are disposed on an outer surface of the side wall, a plurality of the retaining portions on each of the side walls are apart from the top wall and arranged in a row along the length direction; and a plurality of conductive terminals are respectively mounted on the a plurality of the retaining portions of the plug cavity and arranged in two rows parallel to the length direction, each of the conductive terminals being an integrally formed one-piece construction and comprising: a contact segment interposed in a height direction In the insertion cavity; a curved section, one end is connected to the contact section, the other end of the curved section is fixed to the corresponding holding portion; and a resilient section and a fixed section are located in the insertion cavity And the two ends of the elastic section are respectively connected to the other end of the curved section and the fixed section; wherein, the plurality of the conductive terminals are substantially mirror symmetrical corresponding to the plug cavity Settings, multiple a bottom edge of the fixing portion of the conductive terminal is substantially on a plane, and the plug cavity is spaced apart from the plane; the insulating housing is movable relative to the plurality of the fixed segments to enable a plurality of The elastic section is compressed to provide a restoring force to the insulative housing. The floating connector of claim 1, wherein the insulative housing comprises two positioning cavities respectively located at opposite ends of the plug cavity, the floating connector further comprising two positioning posts Two positioning posts are respectively movably inserted into the two positioning cavities, and a bottom edge of each of the positioning posts passes out of the positioning cavity to be described with each of the conductive terminals The bottom edge of the fixed section is commonly used to be fixed on a circuit board. The floating connector of claim 2, wherein each of the positioning posts and The positioning post includes a limiting portion and a supporting portion connected to the limiting portion, and the positioning cavity has a large opening formed on opposite sides of the positioning cavity. a small opening, the sectional area of the limiting portion is larger than the small opening and smaller than the large opening, the cross-sectional area of the supporting portion is smaller than the small opening, and a part of the supporting portion passes through the positioning cavity The small opening, the limiting portion is limited to the positioning cavity. The floating connector of claim 1, wherein each of the contact segments has an extending piece and two clamping pieces respectively formed by bending and extending from opposite side edges of the extending piece, and each The extension piece abuts flatly against an inner surface corresponding to the side wall; the top wall is formed with a plurality of plug interfaces respectively corresponding to the plurality of the conductive terminals, and each of the conductive terminals The end edge of the clamping piece and the extension piece are located outside the area along which the insertion interface is projected in the height direction. The floating connector of claim 1, wherein an inner surface of each of the side walls is formed with a plurality of grooves away from the top wall, each of the curved segments having a connection to the contact segment The inner side portion and an outer side portion fixed to the holding portion, each of the inner side portions facing one of the grooves, respectively, such that each of the inner side portions is spaced apart from the corresponding side wall. The floating connector according to any one of claims 1 to 5, wherein, in each of the conductive terminals, the elastic section is substantially U-shaped, and a center line of each of the elastic segments is The height direction is sandwiched by an acute angle, and each of the acute angles is between 30 and 60 degrees. The floating connector according to any one of claims 1 to 5, wherein, in each of the conductive terminals, a first angle formed by the elastic segment and the curved segment is compared to The second angle formed by the elastic segment and the fixed segment is within a range of 5 degrees, and the first included angle is between 120 and 150 degrees. A floating connector that includes: a plug cavity comprising a top wall and two side walls on opposite sides, each of the side walls being provided with a plurality of retaining portions; and a plurality of conductive terminals respectively mounted to the plurality of the retaining portions of the plug cavity And each of the conductive terminals is an integrally formed one-piece construction and includes: a contact segment disposed in the plug cavity; a curved segment having one end connected to the contact segment, the curved segment being further One end is fixed to the corresponding holding portion; and a resilient portion and a fixed portion are located outside the insertion cavity, and two ends of the elastic segment are respectively connected to the other end of the curved segment and The fixing section; wherein the insertion cavity is movable relative to the plurality of fixing sections, so that the plurality of elastic sections are pressed to provide a restoring force to the insertion cavity. A conductive connector of a floating connector, in an integrally formed one-piece construction and comprising: a contact segment; a curved segment, generally U-shaped, one end of the curved segment being connected to the contact segment; and an elastic segment And a fixed section, the two ends of the elastic section are respectively connected to the other end of the curved section and the fixed section; wherein the elastic section is substantially U-shaped, and the center line of the elastic section is The center line of the curved section is sandwiched by an acute angle; wherein the contact section adjacent to the curved section is formed from the curved section extending along a first direction, and the fixing adjacent to the elastic section The segment portion is formed extending from the elastic segment along a second direction, the first direction being substantially parallel to the second direction and opposite to each other. The conductive terminal of the floating connector of claim 9, wherein a first angle formed by the elastic segment and the curved segment is compared with a first segment formed by the elastic segment and the fixed segment The angle between the two angles is within 5 degrees, and The first angle is between 120 and 150 degrees.